From e1cbca31e556ffc48c0ccd66ef2a7ed46e5f81c7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?V=C3=ADctor=20Sanz?= <vsanzc@alumnos.nebrija.es>
Date: Tue, 22 Apr 2025 15:31:22 +0200
Subject: [PATCH 01/21] Commit inicial

---
 .gitattributes                                |   2 +
 .gitignore                                    |  34 +++
 .mvn/wrapper/maven-wrapper.properties         |  19 ++
 mvnw                                          | 259 ++++++++++++++++++
 mvnw.cmd                                      | 149 ++++++++++
 pom.xml                                       |  63 +++++
 .../HomeworkLibratyApplication.java           |  13 +
 src/main/resources/application.properties     |   5 +
 .../HomeworkLibratyApplicationTests.java      |  13 +
 9 files changed, 557 insertions(+)
 create mode 100644 .gitattributes
 create mode 100644 .gitignore
 create mode 100644 .mvn/wrapper/maven-wrapper.properties
 create mode 100644 mvnw
 create mode 100644 mvnw.cmd
 create mode 100644 pom.xml
 create mode 100644 src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
 create mode 100644 src/main/resources/application.properties
 create mode 100644 src/test/java/com/example/homework_libraty/HomeworkLibratyApplicationTests.java

diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 00000000..3b41682a
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,2 @@
+/mvnw text eol=lf
+*.cmd text eol=crlf
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 00000000..b6a95e78
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,34 @@
+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
diff --git a/.mvn/wrapper/maven-wrapper.properties b/.mvn/wrapper/maven-wrapper.properties
new file mode 100644
index 00000000..d58dfb70
--- /dev/null
+++ b/.mvn/wrapper/maven-wrapper.properties
@@ -0,0 +1,19 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+wrapperVersion=3.3.2
+distributionType=only-script
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.9/apache-maven-3.9.9-bin.zip
diff --git a/mvnw b/mvnw
new file mode 100644
index 00000000..19529ddf
--- /dev/null
+++ b/mvnw
@@ -0,0 +1,259 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Apache Maven Wrapper startup batch script, version 3.3.2
+#
+# Optional ENV vars
+# -----------------
+#   JAVA_HOME - location of a JDK home dir, required when download maven via java source
+#   MVNW_REPOURL - repo url base for downloading maven distribution
+#   MVNW_USERNAME/MVNW_PASSWORD - user and password for downloading maven
+#   MVNW_VERBOSE - true: enable verbose log; debug: trace the mvnw script; others: silence the output
+# ----------------------------------------------------------------------------
+
+set -euf
+[ "${MVNW_VERBOSE-}" != debug ] || set -x
+
+# OS specific support.
+native_path() { printf %s\\n "$1"; }
+case "$(uname)" in
+CYGWIN* | MINGW*)
+  [ -z "${JAVA_HOME-}" ] || JAVA_HOME="$(cygpath --unix "$JAVA_HOME")"
+  native_path() { cygpath --path --windows "$1"; }
+  ;;
+esac
+
+# set JAVACMD and JAVACCMD
+set_java_home() {
+  # For Cygwin and MinGW, ensure paths are in Unix format before anything is touched
+  if [ -n "${JAVA_HOME-}" ]; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ]; then
+      # IBM's JDK on AIX uses strange locations for the executables
+      JAVACMD="$JAVA_HOME/jre/sh/java"
+      JAVACCMD="$JAVA_HOME/jre/sh/javac"
+    else
+      JAVACMD="$JAVA_HOME/bin/java"
+      JAVACCMD="$JAVA_HOME/bin/javac"
+
+      if [ ! -x "$JAVACMD" ] || [ ! -x "$JAVACCMD" ]; then
+        echo "The JAVA_HOME environment variable is not defined correctly, so mvnw cannot run." >&2
+        echo "JAVA_HOME is set to \"$JAVA_HOME\", but \"\$JAVA_HOME/bin/java\" or \"\$JAVA_HOME/bin/javac\" does not exist." >&2
+        return 1
+      fi
+    fi
+  else
+    JAVACMD="$(
+      'set' +e
+      'unset' -f command 2>/dev/null
+      'command' -v java
+    )" || :
+    JAVACCMD="$(
+      'set' +e
+      'unset' -f command 2>/dev/null
+      'command' -v javac
+    )" || :
+
+    if [ ! -x "${JAVACMD-}" ] || [ ! -x "${JAVACCMD-}" ]; then
+      echo "The java/javac command does not exist in PATH nor is JAVA_HOME set, so mvnw cannot run." >&2
+      return 1
+    fi
+  fi
+}
+
+# hash string like Java String::hashCode
+hash_string() {
+  str="${1:-}" h=0
+  while [ -n "$str" ]; do
+    char="${str%"${str#?}"}"
+    h=$(((h * 31 + $(LC_CTYPE=C printf %d "'$char")) % 4294967296))
+    str="${str#?}"
+  done
+  printf %x\\n $h
+}
+
+verbose() { :; }
+[ "${MVNW_VERBOSE-}" != true ] || verbose() { printf %s\\n "${1-}"; }
+
+die() {
+  printf %s\\n "$1" >&2
+  exit 1
+}
+
+trim() {
+  # MWRAPPER-139:
+  #   Trims trailing and leading whitespace, carriage returns, tabs, and linefeeds.
+  #   Needed for removing poorly interpreted newline sequences when running in more
+  #   exotic environments such as mingw bash on Windows.
+  printf "%s" "${1}" | tr -d '[:space:]'
+}
+
+# parse distributionUrl and optional distributionSha256Sum, requires .mvn/wrapper/maven-wrapper.properties
+while IFS="=" read -r key value; do
+  case "${key-}" in
+  distributionUrl) distributionUrl=$(trim "${value-}") ;;
+  distributionSha256Sum) distributionSha256Sum=$(trim "${value-}") ;;
+  esac
+done <"${0%/*}/.mvn/wrapper/maven-wrapper.properties"
+[ -n "${distributionUrl-}" ] || die "cannot read distributionUrl property in ${0%/*}/.mvn/wrapper/maven-wrapper.properties"
+
+case "${distributionUrl##*/}" in
+maven-mvnd-*bin.*)
+  MVN_CMD=mvnd.sh _MVNW_REPO_PATTERN=/maven/mvnd/
+  case "${PROCESSOR_ARCHITECTURE-}${PROCESSOR_ARCHITEW6432-}:$(uname -a)" in
+  *AMD64:CYGWIN* | *AMD64:MINGW*) distributionPlatform=windows-amd64 ;;
+  :Darwin*x86_64) distributionPlatform=darwin-amd64 ;;
+  :Darwin*arm64) distributionPlatform=darwin-aarch64 ;;
+  :Linux*x86_64*) distributionPlatform=linux-amd64 ;;
+  *)
+    echo "Cannot detect native platform for mvnd on $(uname)-$(uname -m), use pure java version" >&2
+    distributionPlatform=linux-amd64
+    ;;
+  esac
+  distributionUrl="${distributionUrl%-bin.*}-$distributionPlatform.zip"
+  ;;
+maven-mvnd-*) MVN_CMD=mvnd.sh _MVNW_REPO_PATTERN=/maven/mvnd/ ;;
+*) MVN_CMD="mvn${0##*/mvnw}" _MVNW_REPO_PATTERN=/org/apache/maven/ ;;
+esac
+
+# apply MVNW_REPOURL and calculate MAVEN_HOME
+# maven home pattern: ~/.m2/wrapper/dists/{apache-maven-<version>,maven-mvnd-<version>-<platform>}/<hash>
+[ -z "${MVNW_REPOURL-}" ] || distributionUrl="$MVNW_REPOURL$_MVNW_REPO_PATTERN${distributionUrl#*"$_MVNW_REPO_PATTERN"}"
+distributionUrlName="${distributionUrl##*/}"
+distributionUrlNameMain="${distributionUrlName%.*}"
+distributionUrlNameMain="${distributionUrlNameMain%-bin}"
+MAVEN_USER_HOME="${MAVEN_USER_HOME:-${HOME}/.m2}"
+MAVEN_HOME="${MAVEN_USER_HOME}/wrapper/dists/${distributionUrlNameMain-}/$(hash_string "$distributionUrl")"
+
+exec_maven() {
+  unset MVNW_VERBOSE MVNW_USERNAME MVNW_PASSWORD MVNW_REPOURL || :
+  exec "$MAVEN_HOME/bin/$MVN_CMD" "$@" || die "cannot exec $MAVEN_HOME/bin/$MVN_CMD"
+}
+
+if [ -d "$MAVEN_HOME" ]; then
+  verbose "found existing MAVEN_HOME at $MAVEN_HOME"
+  exec_maven "$@"
+fi
+
+case "${distributionUrl-}" in
+*?-bin.zip | *?maven-mvnd-?*-?*.zip) ;;
+*) die "distributionUrl is not valid, must match *-bin.zip or maven-mvnd-*.zip, but found '${distributionUrl-}'" ;;
+esac
+
+# prepare tmp dir
+if TMP_DOWNLOAD_DIR="$(mktemp -d)" && [ -d "$TMP_DOWNLOAD_DIR" ]; then
+  clean() { rm -rf -- "$TMP_DOWNLOAD_DIR"; }
+  trap clean HUP INT TERM EXIT
+else
+  die "cannot create temp dir"
+fi
+
+mkdir -p -- "${MAVEN_HOME%/*}"
+
+# Download and Install Apache Maven
+verbose "Couldn't find MAVEN_HOME, downloading and installing it ..."
+verbose "Downloading from: $distributionUrl"
+verbose "Downloading to: $TMP_DOWNLOAD_DIR/$distributionUrlName"
+
+# select .zip or .tar.gz
+if ! command -v unzip >/dev/null; then
+  distributionUrl="${distributionUrl%.zip}.tar.gz"
+  distributionUrlName="${distributionUrl##*/}"
+fi
+
+# verbose opt
+__MVNW_QUIET_WGET=--quiet __MVNW_QUIET_CURL=--silent __MVNW_QUIET_UNZIP=-q __MVNW_QUIET_TAR=''
+[ "${MVNW_VERBOSE-}" != true ] || __MVNW_QUIET_WGET='' __MVNW_QUIET_CURL='' __MVNW_QUIET_UNZIP='' __MVNW_QUIET_TAR=v
+
+# normalize http auth
+case "${MVNW_PASSWORD:+has-password}" in
+'') MVNW_USERNAME='' MVNW_PASSWORD='' ;;
+has-password) [ -n "${MVNW_USERNAME-}" ] || MVNW_USERNAME='' MVNW_PASSWORD='' ;;
+esac
+
+if [ -z "${MVNW_USERNAME-}" ] && command -v wget >/dev/null; then
+  verbose "Found wget ... using wget"
+  wget ${__MVNW_QUIET_WGET:+"$__MVNW_QUIET_WGET"} "$distributionUrl" -O "$TMP_DOWNLOAD_DIR/$distributionUrlName" || die "wget: Failed to fetch $distributionUrl"
+elif [ -z "${MVNW_USERNAME-}" ] && command -v curl >/dev/null; then
+  verbose "Found curl ... using curl"
+  curl ${__MVNW_QUIET_CURL:+"$__MVNW_QUIET_CURL"} -f -L -o "$TMP_DOWNLOAD_DIR/$distributionUrlName" "$distributionUrl" || die "curl: Failed to fetch $distributionUrl"
+elif set_java_home; then
+  verbose "Falling back to use Java to download"
+  javaSource="$TMP_DOWNLOAD_DIR/Downloader.java"
+  targetZip="$TMP_DOWNLOAD_DIR/$distributionUrlName"
+  cat >"$javaSource" <<-END
+	public class Downloader extends java.net.Authenticator
+	{
+	  protected java.net.PasswordAuthentication getPasswordAuthentication()
+	  {
+	    return new java.net.PasswordAuthentication( System.getenv( "MVNW_USERNAME" ), System.getenv( "MVNW_PASSWORD" ).toCharArray() );
+	  }
+	  public static void main( String[] args ) throws Exception
+	  {
+	    setDefault( new Downloader() );
+	    java.nio.file.Files.copy( java.net.URI.create( args[0] ).toURL().openStream(), java.nio.file.Paths.get( args[1] ).toAbsolutePath().normalize() );
+	  }
+	}
+	END
+  # For Cygwin/MinGW, switch paths to Windows format before running javac and java
+  verbose " - Compiling Downloader.java ..."
+  "$(native_path "$JAVACCMD")" "$(native_path "$javaSource")" || die "Failed to compile Downloader.java"
+  verbose " - Running Downloader.java ..."
+  "$(native_path "$JAVACMD")" -cp "$(native_path "$TMP_DOWNLOAD_DIR")" Downloader "$distributionUrl" "$(native_path "$targetZip")"
+fi
+
+# If specified, validate the SHA-256 sum of the Maven distribution zip file
+if [ -n "${distributionSha256Sum-}" ]; then
+  distributionSha256Result=false
+  if [ "$MVN_CMD" = mvnd.sh ]; then
+    echo "Checksum validation is not supported for maven-mvnd." >&2
+    echo "Please disable validation by removing 'distributionSha256Sum' from your maven-wrapper.properties." >&2
+    exit 1
+  elif command -v sha256sum >/dev/null; then
+    if echo "$distributionSha256Sum  $TMP_DOWNLOAD_DIR/$distributionUrlName" | sha256sum -c >/dev/null 2>&1; then
+      distributionSha256Result=true
+    fi
+  elif command -v shasum >/dev/null; then
+    if echo "$distributionSha256Sum  $TMP_DOWNLOAD_DIR/$distributionUrlName" | shasum -a 256 -c >/dev/null 2>&1; then
+      distributionSha256Result=true
+    fi
+  else
+    echo "Checksum validation was requested but neither 'sha256sum' or 'shasum' are available." >&2
+    echo "Please install either command, or disable validation by removing 'distributionSha256Sum' from your maven-wrapper.properties." >&2
+    exit 1
+  fi
+  if [ $distributionSha256Result = false ]; then
+    echo "Error: Failed to validate Maven distribution SHA-256, your Maven distribution might be compromised." >&2
+    echo "If you updated your Maven version, you need to update the specified distributionSha256Sum property." >&2
+    exit 1
+  fi
+fi
+
+# unzip and move
+if command -v unzip >/dev/null; then
+  unzip ${__MVNW_QUIET_UNZIP:+"$__MVNW_QUIET_UNZIP"} "$TMP_DOWNLOAD_DIR/$distributionUrlName" -d "$TMP_DOWNLOAD_DIR" || die "failed to unzip"
+else
+  tar xzf${__MVNW_QUIET_TAR:+"$__MVNW_QUIET_TAR"} "$TMP_DOWNLOAD_DIR/$distributionUrlName" -C "$TMP_DOWNLOAD_DIR" || die "failed to untar"
+fi
+printf %s\\n "$distributionUrl" >"$TMP_DOWNLOAD_DIR/$distributionUrlNameMain/mvnw.url"
+mv -- "$TMP_DOWNLOAD_DIR/$distributionUrlNameMain" "$MAVEN_HOME" || [ -d "$MAVEN_HOME" ] || die "fail to move MAVEN_HOME"
+
+clean || :
+exec_maven "$@"
diff --git a/mvnw.cmd b/mvnw.cmd
new file mode 100644
index 00000000..249bdf38
--- /dev/null
+++ b/mvnw.cmd
@@ -0,0 +1,149 @@
+<# : batch portion
+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    http://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Apache Maven Wrapper startup batch script, version 3.3.2
+@REM
+@REM Optional ENV vars
+@REM   MVNW_REPOURL - repo url base for downloading maven distribution
+@REM   MVNW_USERNAME/MVNW_PASSWORD - user and password for downloading maven
+@REM   MVNW_VERBOSE - true: enable verbose log; others: silence the output
+@REM ----------------------------------------------------------------------------
+
+@IF "%__MVNW_ARG0_NAME__%"=="" (SET __MVNW_ARG0_NAME__=%~nx0)
+@SET __MVNW_CMD__=
+@SET __MVNW_ERROR__=
+@SET __MVNW_PSMODULEP_SAVE=%PSModulePath%
+@SET PSModulePath=
+@FOR /F "usebackq tokens=1* delims==" %%A IN (`powershell -noprofile "& {$scriptDir='%~dp0'; $script='%__MVNW_ARG0_NAME__%'; icm -ScriptBlock ([Scriptblock]::Create((Get-Content -Raw '%~f0'))) -NoNewScope}"`) DO @(
+  IF "%%A"=="MVN_CMD" (set __MVNW_CMD__=%%B) ELSE IF "%%B"=="" (echo %%A) ELSE (echo %%A=%%B)
+)
+@SET PSModulePath=%__MVNW_PSMODULEP_SAVE%
+@SET __MVNW_PSMODULEP_SAVE=
+@SET __MVNW_ARG0_NAME__=
+@SET MVNW_USERNAME=
+@SET MVNW_PASSWORD=
+@IF NOT "%__MVNW_CMD__%"=="" (%__MVNW_CMD__% %*)
+@echo Cannot start maven from wrapper >&2 && exit /b 1
+@GOTO :EOF
+: end batch / begin powershell #>
+
+$ErrorActionPreference = "Stop"
+if ($env:MVNW_VERBOSE -eq "true") {
+  $VerbosePreference = "Continue"
+}
+
+# calculate distributionUrl, requires .mvn/wrapper/maven-wrapper.properties
+$distributionUrl = (Get-Content -Raw "$scriptDir/.mvn/wrapper/maven-wrapper.properties" | ConvertFrom-StringData).distributionUrl
+if (!$distributionUrl) {
+  Write-Error "cannot read distributionUrl property in $scriptDir/.mvn/wrapper/maven-wrapper.properties"
+}
+
+switch -wildcard -casesensitive ( $($distributionUrl -replace '^.*/','') ) {
+  "maven-mvnd-*" {
+    $USE_MVND = $true
+    $distributionUrl = $distributionUrl -replace '-bin\.[^.]*$',"-windows-amd64.zip"
+    $MVN_CMD = "mvnd.cmd"
+    break
+  }
+  default {
+    $USE_MVND = $false
+    $MVN_CMD = $script -replace '^mvnw','mvn'
+    break
+  }
+}
+
+# apply MVNW_REPOURL and calculate MAVEN_HOME
+# maven home pattern: ~/.m2/wrapper/dists/{apache-maven-<version>,maven-mvnd-<version>-<platform>}/<hash>
+if ($env:MVNW_REPOURL) {
+  $MVNW_REPO_PATTERN = if ($USE_MVND) { "/org/apache/maven/" } else { "/maven/mvnd/" }
+  $distributionUrl = "$env:MVNW_REPOURL$MVNW_REPO_PATTERN$($distributionUrl -replace '^.*'+$MVNW_REPO_PATTERN,'')"
+}
+$distributionUrlName = $distributionUrl -replace '^.*/',''
+$distributionUrlNameMain = $distributionUrlName -replace '\.[^.]*$','' -replace '-bin$',''
+$MAVEN_HOME_PARENT = "$HOME/.m2/wrapper/dists/$distributionUrlNameMain"
+if ($env:MAVEN_USER_HOME) {
+  $MAVEN_HOME_PARENT = "$env:MAVEN_USER_HOME/wrapper/dists/$distributionUrlNameMain"
+}
+$MAVEN_HOME_NAME = ([System.Security.Cryptography.MD5]::Create().ComputeHash([byte[]][char[]]$distributionUrl) | ForEach-Object {$_.ToString("x2")}) -join ''
+$MAVEN_HOME = "$MAVEN_HOME_PARENT/$MAVEN_HOME_NAME"
+
+if (Test-Path -Path "$MAVEN_HOME" -PathType Container) {
+  Write-Verbose "found existing MAVEN_HOME at $MAVEN_HOME"
+  Write-Output "MVN_CMD=$MAVEN_HOME/bin/$MVN_CMD"
+  exit $?
+}
+
+if (! $distributionUrlNameMain -or ($distributionUrlName -eq $distributionUrlNameMain)) {
+  Write-Error "distributionUrl is not valid, must end with *-bin.zip, but found $distributionUrl"
+}
+
+# prepare tmp dir
+$TMP_DOWNLOAD_DIR_HOLDER = New-TemporaryFile
+$TMP_DOWNLOAD_DIR = New-Item -Itemtype Directory -Path "$TMP_DOWNLOAD_DIR_HOLDER.dir"
+$TMP_DOWNLOAD_DIR_HOLDER.Delete() | Out-Null
+trap {
+  if ($TMP_DOWNLOAD_DIR.Exists) {
+    try { Remove-Item $TMP_DOWNLOAD_DIR -Recurse -Force | Out-Null }
+    catch { Write-Warning "Cannot remove $TMP_DOWNLOAD_DIR" }
+  }
+}
+
+New-Item -Itemtype Directory -Path "$MAVEN_HOME_PARENT" -Force | Out-Null
+
+# Download and Install Apache Maven
+Write-Verbose "Couldn't find MAVEN_HOME, downloading and installing it ..."
+Write-Verbose "Downloading from: $distributionUrl"
+Write-Verbose "Downloading to: $TMP_DOWNLOAD_DIR/$distributionUrlName"
+
+$webclient = New-Object System.Net.WebClient
+if ($env:MVNW_USERNAME -and $env:MVNW_PASSWORD) {
+  $webclient.Credentials = New-Object System.Net.NetworkCredential($env:MVNW_USERNAME, $env:MVNW_PASSWORD)
+}
+[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
+$webclient.DownloadFile($distributionUrl, "$TMP_DOWNLOAD_DIR/$distributionUrlName") | Out-Null
+
+# If specified, validate the SHA-256 sum of the Maven distribution zip file
+$distributionSha256Sum = (Get-Content -Raw "$scriptDir/.mvn/wrapper/maven-wrapper.properties" | ConvertFrom-StringData).distributionSha256Sum
+if ($distributionSha256Sum) {
+  if ($USE_MVND) {
+    Write-Error "Checksum validation is not supported for maven-mvnd. `nPlease disable validation by removing 'distributionSha256Sum' from your maven-wrapper.properties."
+  }
+  Import-Module $PSHOME\Modules\Microsoft.PowerShell.Utility -Function Get-FileHash
+  if ((Get-FileHash "$TMP_DOWNLOAD_DIR/$distributionUrlName" -Algorithm SHA256).Hash.ToLower() -ne $distributionSha256Sum) {
+    Write-Error "Error: Failed to validate Maven distribution SHA-256, your Maven distribution might be compromised. If you updated your Maven version, you need to update the specified distributionSha256Sum property."
+  }
+}
+
+# unzip and move
+Expand-Archive "$TMP_DOWNLOAD_DIR/$distributionUrlName" -DestinationPath "$TMP_DOWNLOAD_DIR" | Out-Null
+Rename-Item -Path "$TMP_DOWNLOAD_DIR/$distributionUrlNameMain" -NewName $MAVEN_HOME_NAME | Out-Null
+try {
+  Move-Item -Path "$TMP_DOWNLOAD_DIR/$MAVEN_HOME_NAME" -Destination $MAVEN_HOME_PARENT | Out-Null
+} catch {
+  if (! (Test-Path -Path "$MAVEN_HOME" -PathType Container)) {
+    Write-Error "fail to move MAVEN_HOME"
+  }
+} finally {
+  try { Remove-Item $TMP_DOWNLOAD_DIR -Recurse -Force | Out-Null }
+  catch { Write-Warning "Cannot remove $TMP_DOWNLOAD_DIR" }
+}
+
+Write-Output "MVN_CMD=$MAVEN_HOME/bin/$MVN_CMD"
diff --git a/pom.xml b/pom.xml
new file mode 100644
index 00000000..97a955f9
--- /dev/null
+++ b/pom.xml
@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>3.4.4</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+	<groupId>com.example</groupId>
+	<artifactId>homework_libraty</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>homework_libraty</name>
+	<description>Demo project for Spring Boot</description>
+	<url/>
+	<licenses>
+		<license/>
+	</licenses>
+	<developers>
+		<developer/>
+	</developers>
+	<scm>
+		<connection/>
+		<developerConnection/>
+		<tag/>
+		<url/>
+	</scm>
+	<properties>
+		<java.version>21</java.version>
+	</properties>
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-jpa</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>com.mysql</groupId>
+			<artifactId>mysql-connector-j</artifactId>
+			<scope>runtime</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java b/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
new file mode 100644
index 00000000..d625b469
--- /dev/null
+++ b/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
@@ -0,0 +1,13 @@
+package com.example.homework_libraty;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class HomeworkLibratyApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(HomeworkLibratyApplication.class, args);
+	}
+
+}
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
new file mode 100644
index 00000000..d84b6b97
--- /dev/null
+++ b/src/main/resources/application.properties
@@ -0,0 +1,5 @@
+spring.application.name=homework_libraty
+spring.datasource.url=jdbc:mysql://localhost:3306/lab_library?serverTimezone=UTC
+spring.datasource.username=root
+spring.datasource.password=admin
+spring.jpa.hibernate.ddl-auto=update
diff --git a/src/test/java/com/example/homework_libraty/HomeworkLibratyApplicationTests.java b/src/test/java/com/example/homework_libraty/HomeworkLibratyApplicationTests.java
new file mode 100644
index 00000000..e358d86e
--- /dev/null
+++ b/src/test/java/com/example/homework_libraty/HomeworkLibratyApplicationTests.java
@@ -0,0 +1,13 @@
+package com.example.homework_libraty;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class HomeworkLibratyApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}

From c39f9f45b44ec72f99b5ec37738bcfa0e8141be0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?V=C3=ADctor=20Sanz?= <vsanzc@alumnos.nebrija.es>
Date: Tue, 22 Apr 2025 16:43:55 +0200
Subject: [PATCH 02/21] Modelos y repositorios definidos

---
 .../homework_libraty/models/Author.java       | 73 ++++++++++++++++
 .../example/homework_libraty/models/Book.java | 72 ++++++++++++++++
 .../homework_libraty/models/Issue.java        | 86 +++++++++++++++++++
 .../homework_libraty/models/Student.java      | 47 ++++++++++
 .../repositories/AuthorRepository.java        |  7 ++
 .../repositories/BookRepository.java          |  8 ++
 .../repositories/IssuesRepository.java        |  7 ++
 .../repositories/StudentRepository.java       |  7 ++
 .../homework_libraty/models/StudentTest.java  | 25 ++++++
 9 files changed, 332 insertions(+)
 create mode 100644 src/main/java/com/example/homework_libraty/models/Author.java
 create mode 100644 src/main/java/com/example/homework_libraty/models/Book.java
 create mode 100644 src/main/java/com/example/homework_libraty/models/Issue.java
 create mode 100644 src/main/java/com/example/homework_libraty/models/Student.java
 create mode 100644 src/main/java/com/example/homework_libraty/repositories/AuthorRepository.java
 create mode 100644 src/main/java/com/example/homework_libraty/repositories/BookRepository.java
 create mode 100644 src/main/java/com/example/homework_libraty/repositories/IssuesRepository.java
 create mode 100644 src/main/java/com/example/homework_libraty/repositories/StudentRepository.java
 create mode 100644 src/test/java/com/example/homework_libraty/models/StudentTest.java

diff --git a/src/main/java/com/example/homework_libraty/models/Author.java b/src/main/java/com/example/homework_libraty/models/Author.java
new file mode 100644
index 00000000..336a7b33
--- /dev/null
+++ b/src/main/java/com/example/homework_libraty/models/Author.java
@@ -0,0 +1,73 @@
+package com.example.homework_libraty.models;
+
+import jakarta.persistence.*;
+
+import java.awt.print.Book;
+
+@Entity
+@Table(name = "author")
+public class Author {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "author_id")
+    private int id;
+
+    private String name;
+
+    private String email;
+
+    @Column(name = "author_book")
+    private Book authorBook;
+
+    public Author() {
+    }
+
+    public Author(String name, String email, Book authorBook) {
+        this.name = name;
+        this.email = email;
+        this.authorBook = authorBook;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    public Book getAuthorBook() {
+        return authorBook;
+    }
+
+    public void setAuthorBook(Book authorBook) {
+        this.authorBook = authorBook;
+    }
+
+    @Override
+    public String toString() {
+        return "Author{" +
+                "id=" + id +
+                ", name='" + name + '\'' +
+                ", email='" + email + '\'' +
+                ", authorBook=" + authorBook +
+                '}';
+    }
+}
diff --git a/src/main/java/com/example/homework_libraty/models/Book.java b/src/main/java/com/example/homework_libraty/models/Book.java
new file mode 100644
index 00000000..416d0488
--- /dev/null
+++ b/src/main/java/com/example/homework_libraty/models/Book.java
@@ -0,0 +1,72 @@
+package com.example.homework_libraty.models;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+
+@Entity
+@Table(name = "books")
+public class Book {
+
+    @Id
+    private String isbn;
+
+    private String tittle;
+
+    private String category;
+
+    private int quantity;
+
+    public Book() {
+    }
+
+    public Book(String isbn, String tittle, String category, int quantity) {
+        this.isbn = isbn;
+        this.tittle = tittle;
+        this.category = category;
+        this.quantity = quantity;
+    }
+
+    public String getIsbn() {
+        return isbn;
+    }
+
+    public void setIsbn(String isbn) {
+        this.isbn = isbn;
+    }
+
+    public String getTittle() {
+        return tittle;
+    }
+
+    public void setTittle(String tittle) {
+        this.tittle = tittle;
+    }
+
+    public String getCategory() {
+        return category;
+    }
+
+    public void setCategory(String category) {
+        this.category = category;
+    }
+
+    public int getQuantity() {
+        return quantity;
+    }
+
+    public void setQuantity(int quantity) {
+        this.quantity = quantity;
+    }
+
+    @Override
+    public String toString() {
+        return "Book{" +
+                "isbn='" + isbn + '\'' +
+                ", tittle='" + tittle + '\'' +
+                ", category='" + category + '\'' +
+                ", quantity=" + quantity +
+                '}';
+    }
+}
diff --git a/src/main/java/com/example/homework_libraty/models/Issue.java b/src/main/java/com/example/homework_libraty/models/Issue.java
new file mode 100644
index 00000000..ada8df77
--- /dev/null
+++ b/src/main/java/com/example/homework_libraty/models/Issue.java
@@ -0,0 +1,86 @@
+package com.example.homework_libraty.models;
+
+import jakarta.persistence.*;
+
+@Entity
+@Table(name = "issues")
+public class Issue {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "issue_id")
+    private int issueId;
+
+    @Column(name = "issue_date")
+    private String issueDate;
+
+    @Column(name = "return_date")
+    private String returnDate;
+
+    @Column(name = "issue_book")
+    private Book issueBook;
+
+    @Column(name = "issue_student")
+    private Student issueStudent;
+
+    public Issue() {
+    }
+
+    public Issue(String issueDate, String returnDate, Book issueBook, Student issueStudent) {
+        this.issueDate = issueDate;
+        this.returnDate = returnDate;
+        this.issueBook = issueBook;
+        this.issueStudent = issueStudent;
+    }
+
+    public int getIssueId() {
+        return issueId;
+    }
+
+    public void setIssueId(int issueId) {
+        this.issueId = issueId;
+    }
+
+    public String getIssueDate() {
+        return issueDate;
+    }
+
+    public void setIssueDate(String issueDate) {
+        this.issueDate = issueDate;
+    }
+
+    public String getReturnDate() {
+        return returnDate;
+    }
+
+    public void setReturnDate(String returnDate) {
+        this.returnDate = returnDate;
+    }
+
+    public Book getIssueBook() {
+        return issueBook;
+    }
+
+    public void setIssueBook(Book issueBook) {
+        this.issueBook = issueBook;
+    }
+
+    public Student getIssueStudent() {
+        return issueStudent;
+    }
+
+    public void setIssueStudent(Student issueStudent) {
+        this.issueStudent = issueStudent;
+    }
+
+    @Override
+    public String toString() {
+        return "Issue{" +
+                "issueId=" + issueId +
+                ", issueDate='" + issueDate + '\'' +
+                ", returnDate='" + returnDate + '\'' +
+                ", issueBook=" + issueBook +
+                ", issueStudent=" + issueStudent +
+                '}';
+    }
+}
diff --git a/src/main/java/com/example/homework_libraty/models/Student.java b/src/main/java/com/example/homework_libraty/models/Student.java
new file mode 100644
index 00000000..af78eb21
--- /dev/null
+++ b/src/main/java/com/example/homework_libraty/models/Student.java
@@ -0,0 +1,47 @@
+package com.example.homework_libraty.models;
+
+import jakarta.persistence.*;
+
+@Entity
+@Table(name = "students")
+public class Student {
+
+    @Id
+    private String usn;
+
+    private String name;
+
+    public Student() {
+    }
+
+    public Student(String usn, String name) {
+        this.usn = usn;
+        this.name = name;
+    }
+
+    public String getUsn() {
+        return usn;
+    }
+
+    public void setUsn(String usn) {
+        this.usn = usn;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    @Override
+    public String toString() {
+        return "Student{" +
+                "usn='" + usn + '\'' +
+                ", name='" + name + '\'' +
+                '}';
+    }
+
+
+}
diff --git a/src/main/java/com/example/homework_libraty/repositories/AuthorRepository.java b/src/main/java/com/example/homework_libraty/repositories/AuthorRepository.java
new file mode 100644
index 00000000..17007b63
--- /dev/null
+++ b/src/main/java/com/example/homework_libraty/repositories/AuthorRepository.java
@@ -0,0 +1,7 @@
+package com.example.homework_libraty.repositories;
+
+import com.example.homework_libraty.models.Author;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface AuthorRepository extends JpaRepository<Author, Integer> {
+}
diff --git a/src/main/java/com/example/homework_libraty/repositories/BookRepository.java b/src/main/java/com/example/homework_libraty/repositories/BookRepository.java
new file mode 100644
index 00000000..e1846a95
--- /dev/null
+++ b/src/main/java/com/example/homework_libraty/repositories/BookRepository.java
@@ -0,0 +1,8 @@
+package com.example.homework_libraty.repositories;
+
+import com.example.homework_libraty.models.Author;
+import com.example.homework_libraty.models.Book;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface BookRepository extends JpaRepository<Book, String> {
+}
diff --git a/src/main/java/com/example/homework_libraty/repositories/IssuesRepository.java b/src/main/java/com/example/homework_libraty/repositories/IssuesRepository.java
new file mode 100644
index 00000000..f75d0dba
--- /dev/null
+++ b/src/main/java/com/example/homework_libraty/repositories/IssuesRepository.java
@@ -0,0 +1,7 @@
+package com.example.homework_libraty.repositories;
+
+import com.example.homework_libraty.models.Issue;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface IssuesRepository extends JpaRepository<Issue, Integer> {
+}
diff --git a/src/main/java/com/example/homework_libraty/repositories/StudentRepository.java b/src/main/java/com/example/homework_libraty/repositories/StudentRepository.java
new file mode 100644
index 00000000..5912af42
--- /dev/null
+++ b/src/main/java/com/example/homework_libraty/repositories/StudentRepository.java
@@ -0,0 +1,7 @@
+package com.example.homework_libraty.repositories;
+
+import com.example.homework_libraty.models.Student;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface StudentRepository extends JpaRepository<Student, String> {
+}
diff --git a/src/test/java/com/example/homework_libraty/models/StudentTest.java b/src/test/java/com/example/homework_libraty/models/StudentTest.java
new file mode 100644
index 00000000..e95e434e
--- /dev/null
+++ b/src/test/java/com/example/homework_libraty/models/StudentTest.java
@@ -0,0 +1,25 @@
+package com.example.homework_libraty.models;
+
+import com.example.homework_libraty.repositories.StudentRepository;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+@SpringBootTest
+class StudentTest {
+
+    @Autowired
+    StudentRepository studentRepository;
+
+    @Test
+    @DisplayName("Guardo un estudiante en la base de datos")
+    void saveStudent(){
+        Student student = new Student("32e2r4frf", "Victor Sanz");
+
+        studentRepository.save(student);
+    }
+
+}
\ No newline at end of file

From 06f5f101ad7f02a1133758bc25bb01884aa3a484 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?V=C3=ADctor=20Sanz?= <vsanzc@alumnos.nebrija.es>
Date: Tue, 22 Apr 2025 16:49:38 +0200
Subject: [PATCH 03/21] Relaciones establecidas

---
 .../java/com/example/homework_libraty/models/Author.java    | 3 ++-
 .../java/com/example/homework_libraty/models/Issue.java     | 6 ++++--
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/main/java/com/example/homework_libraty/models/Author.java b/src/main/java/com/example/homework_libraty/models/Author.java
index 336a7b33..05152de3 100644
--- a/src/main/java/com/example/homework_libraty/models/Author.java
+++ b/src/main/java/com/example/homework_libraty/models/Author.java
@@ -17,7 +17,8 @@ public class Author {
 
     private String email;
 
-    @Column(name = "author_book")
+    @OneToOne
+    @JoinColumn(name = "author_book", referencedColumnName = "isbn")
     private Book authorBook;
 
     public Author() {
diff --git a/src/main/java/com/example/homework_libraty/models/Issue.java b/src/main/java/com/example/homework_libraty/models/Issue.java
index ada8df77..5da02c80 100644
--- a/src/main/java/com/example/homework_libraty/models/Issue.java
+++ b/src/main/java/com/example/homework_libraty/models/Issue.java
@@ -17,10 +17,12 @@ public class Issue {
     @Column(name = "return_date")
     private String returnDate;
 
-    @Column(name = "issue_book")
+    @OneToOne
+    @JoinColumn(name = "issue_book", referencedColumnName = "isbm")
     private Book issueBook;
 
-    @Column(name = "issue_student")
+    @OneToOne
+    @JoinColumn(name = "issue_student", referencedColumnName = "usn")
     private Student issueStudent;
 
     public Issue() {

From 65e42f522e24fd8e19f1c766a70565b982f75aec Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?V=C3=ADctor=20Sanz?= <vsanzc@alumnos.nebrija.es>
Date: Tue, 22 Apr 2025 16:50:16 +0200
Subject: [PATCH 04/21] Errata corregida

---
 src/main/java/com/example/homework_libraty/models/Issue.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/java/com/example/homework_libraty/models/Issue.java b/src/main/java/com/example/homework_libraty/models/Issue.java
index 5da02c80..e0311f34 100644
--- a/src/main/java/com/example/homework_libraty/models/Issue.java
+++ b/src/main/java/com/example/homework_libraty/models/Issue.java
@@ -18,7 +18,7 @@ public class Issue {
     private String returnDate;
 
     @OneToOne
-    @JoinColumn(name = "issue_book", referencedColumnName = "isbm")
+    @JoinColumn(name = "issue_book", referencedColumnName = "isbn")
     private Book issueBook;
 
     @OneToOne

From c10c8de1dea7ef53d1f82e5097cd0b5d801b9878 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?V=C3=ADctor=20Sanz?= <vsanzc@alumnos.nebrija.es>
Date: Tue, 22 Apr 2025 17:25:54 +0200
Subject: [PATCH 05/21] Fallo tecnico ejemplo

---
 .../homework_libraty/models/Author.java       | 10 ++++----
 .../models/{Book.java => BookExample.java}    |  7 +++---
 .../homework_libraty/models/Issue.java        |  8 +++---
 .../repositories/BookRepository.java          |  5 ++--
 src/main/resources/application.properties     |  6 +++--
 .../homework_libraty/models/BookTest.java     | 25 +++++++++++++++++++
 .../homework_libraty/models/StudentTest.java  |  2 +-
 7 files changed, 44 insertions(+), 19 deletions(-)
 rename src/main/java/com/example/homework_libraty/models/{Book.java => BookExample.java} (89%)
 create mode 100644 src/test/java/com/example/homework_libraty/models/BookTest.java

diff --git a/src/main/java/com/example/homework_libraty/models/Author.java b/src/main/java/com/example/homework_libraty/models/Author.java
index 05152de3..e748d6d3 100644
--- a/src/main/java/com/example/homework_libraty/models/Author.java
+++ b/src/main/java/com/example/homework_libraty/models/Author.java
@@ -2,7 +2,7 @@
 
 import jakarta.persistence.*;
 
-import java.awt.print.Book;
+//import java.awt.print.Book;
 
 @Entity
 @Table(name = "author")
@@ -19,12 +19,12 @@ public class Author {
 
     @OneToOne
     @JoinColumn(name = "author_book", referencedColumnName = "isbn")
-    private Book authorBook;
+    private BookExample authorBook;
 
     public Author() {
     }
 
-    public Author(String name, String email, Book authorBook) {
+    public Author(String name, String email, BookExample authorBook) {
         this.name = name;
         this.email = email;
         this.authorBook = authorBook;
@@ -54,11 +54,11 @@ public void setEmail(String email) {
         this.email = email;
     }
 
-    public Book getAuthorBook() {
+    public BookExample getAuthorBook() {
         return authorBook;
     }
 
-    public void setAuthorBook(Book authorBook) {
+    public void setAuthorBook(BookExample authorBook) {
         this.authorBook = authorBook;
     }
 
diff --git a/src/main/java/com/example/homework_libraty/models/Book.java b/src/main/java/com/example/homework_libraty/models/BookExample.java
similarity index 89%
rename from src/main/java/com/example/homework_libraty/models/Book.java
rename to src/main/java/com/example/homework_libraty/models/BookExample.java
index 416d0488..214c1165 100644
--- a/src/main/java/com/example/homework_libraty/models/Book.java
+++ b/src/main/java/com/example/homework_libraty/models/BookExample.java
@@ -1,13 +1,12 @@
 package com.example.homework_libraty.models;
 
-import jakarta.persistence.Column;
 import jakarta.persistence.Entity;
 import jakarta.persistence.Id;
 import jakarta.persistence.Table;
 
 @Entity
 @Table(name = "books")
-public class Book {
+public class BookExample {
 
     @Id
     private String isbn;
@@ -18,10 +17,10 @@ public class Book {
 
     private int quantity;
 
-    public Book() {
+    public BookExample() {
     }
 
-    public Book(String isbn, String tittle, String category, int quantity) {
+    public BookExample(String isbn, String tittle, String category, int quantity) {
         this.isbn = isbn;
         this.tittle = tittle;
         this.category = category;
diff --git a/src/main/java/com/example/homework_libraty/models/Issue.java b/src/main/java/com/example/homework_libraty/models/Issue.java
index e0311f34..5be25165 100644
--- a/src/main/java/com/example/homework_libraty/models/Issue.java
+++ b/src/main/java/com/example/homework_libraty/models/Issue.java
@@ -19,7 +19,7 @@ public class Issue {
 
     @OneToOne
     @JoinColumn(name = "issue_book", referencedColumnName = "isbn")
-    private Book issueBook;
+    private BookExample issueBook;
 
     @OneToOne
     @JoinColumn(name = "issue_student", referencedColumnName = "usn")
@@ -28,7 +28,7 @@ public class Issue {
     public Issue() {
     }
 
-    public Issue(String issueDate, String returnDate, Book issueBook, Student issueStudent) {
+    public Issue(String issueDate, String returnDate, BookExample issueBook, Student issueStudent) {
         this.issueDate = issueDate;
         this.returnDate = returnDate;
         this.issueBook = issueBook;
@@ -59,11 +59,11 @@ public void setReturnDate(String returnDate) {
         this.returnDate = returnDate;
     }
 
-    public Book getIssueBook() {
+    public BookExample getIssueBook() {
         return issueBook;
     }
 
-    public void setIssueBook(Book issueBook) {
+    public void setIssueBook(BookExample issueBook) {
         this.issueBook = issueBook;
     }
 
diff --git a/src/main/java/com/example/homework_libraty/repositories/BookRepository.java b/src/main/java/com/example/homework_libraty/repositories/BookRepository.java
index e1846a95..3d39111f 100644
--- a/src/main/java/com/example/homework_libraty/repositories/BookRepository.java
+++ b/src/main/java/com/example/homework_libraty/repositories/BookRepository.java
@@ -1,8 +1,7 @@
 package com.example.homework_libraty.repositories;
 
-import com.example.homework_libraty.models.Author;
-import com.example.homework_libraty.models.Book;
+import com.example.homework_libraty.models.BookExample;
 import org.springframework.data.jpa.repository.JpaRepository;
 
-public interface BookRepository extends JpaRepository<Book, String> {
+public interface BookRepository extends JpaRepository<BookExample, String> {
 }
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
index d84b6b97..d9691582 100644
--- a/src/main/resources/application.properties
+++ b/src/main/resources/application.properties
@@ -1,5 +1,7 @@
 spring.application.name=homework_libraty
-spring.datasource.url=jdbc:mysql://localhost:3306/lab_library?serverTimezone=UTC
+spring.datasource.url=jdbc:mysql://localhost:3306/lab_library
 spring.datasource.username=root
 spring.datasource.password=admin
-spring.jpa.hibernate.ddl-auto=update
+spring.jpa.hibernate.ddl-auto=none
+spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQLDialect
+
diff --git a/src/test/java/com/example/homework_libraty/models/BookTest.java b/src/test/java/com/example/homework_libraty/models/BookTest.java
new file mode 100644
index 00000000..e302d0d2
--- /dev/null
+++ b/src/test/java/com/example/homework_libraty/models/BookTest.java
@@ -0,0 +1,25 @@
+package com.example.homework_libraty.models;
+
+import com.example.homework_libraty.repositories.BookRepository;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+@SpringBootTest
+class BookTest {
+
+    /*@Autowired
+    BookRepository bookRepository;
+
+    @Test
+    @DisplayName("Save book")
+    void saveBook(){
+        Book book = new Book("32fs4r", "El señor de los anillos", "accion", 42);
+        bookRepository.save(book);
+
+    }*/
+
+}
\ No newline at end of file
diff --git a/src/test/java/com/example/homework_libraty/models/StudentTest.java b/src/test/java/com/example/homework_libraty/models/StudentTest.java
index e95e434e..caec7664 100644
--- a/src/test/java/com/example/homework_libraty/models/StudentTest.java
+++ b/src/test/java/com/example/homework_libraty/models/StudentTest.java
@@ -17,7 +17,7 @@ class StudentTest {
     @Test
     @DisplayName("Guardo un estudiante en la base de datos")
     void saveStudent(){
-        Student student = new Student("32e2r4frf", "Victor Sanz");
+        Student student = new Student("843t", "Daniel");
 
         studentRepository.save(student);
     }

From adcb47db293a36f402b551ac3718c1725e127ba1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?V=C3=ADctor=20Sanz?= <vsanzc@alumnos.nebrija.es>
Date: Tue, 22 Apr 2025 17:28:59 +0200
Subject: [PATCH 06/21] Fallo tecnico resuelto

---
 .../com/example/homework_libraty/models/Author.java    | 10 ++++------
 .../models/{BookExample.java => Book.java}             |  6 +++---
 .../com/example/homework_libraty/models/Issue.java     |  8 ++++----
 .../homework_libraty/repositories/BookRepository.java  |  4 ++--
 .../com/example/homework_libraty/models/BookTest.java  |  4 ++--
 5 files changed, 15 insertions(+), 17 deletions(-)
 rename src/main/java/com/example/homework_libraty/models/{BookExample.java => Book.java} (90%)

diff --git a/src/main/java/com/example/homework_libraty/models/Author.java b/src/main/java/com/example/homework_libraty/models/Author.java
index e748d6d3..cfe8abba 100644
--- a/src/main/java/com/example/homework_libraty/models/Author.java
+++ b/src/main/java/com/example/homework_libraty/models/Author.java
@@ -2,8 +2,6 @@
 
 import jakarta.persistence.*;
 
-//import java.awt.print.Book;
-
 @Entity
 @Table(name = "author")
 public class Author {
@@ -19,12 +17,12 @@ public class Author {
 
     @OneToOne
     @JoinColumn(name = "author_book", referencedColumnName = "isbn")
-    private BookExample authorBook;
+    private Book authorBook;
 
     public Author() {
     }
 
-    public Author(String name, String email, BookExample authorBook) {
+    public Author(String name, String email, Book authorBook) {
         this.name = name;
         this.email = email;
         this.authorBook = authorBook;
@@ -54,11 +52,11 @@ public void setEmail(String email) {
         this.email = email;
     }
 
-    public BookExample getAuthorBook() {
+    public Book getAuthorBook() {
         return authorBook;
     }
 
-    public void setAuthorBook(BookExample authorBook) {
+    public void setAuthorBook(Book authorBook) {
         this.authorBook = authorBook;
     }
 
diff --git a/src/main/java/com/example/homework_libraty/models/BookExample.java b/src/main/java/com/example/homework_libraty/models/Book.java
similarity index 90%
rename from src/main/java/com/example/homework_libraty/models/BookExample.java
rename to src/main/java/com/example/homework_libraty/models/Book.java
index 214c1165..a2abcf69 100644
--- a/src/main/java/com/example/homework_libraty/models/BookExample.java
+++ b/src/main/java/com/example/homework_libraty/models/Book.java
@@ -6,7 +6,7 @@
 
 @Entity
 @Table(name = "books")
-public class BookExample {
+public class Book {
 
     @Id
     private String isbn;
@@ -17,10 +17,10 @@ public class BookExample {
 
     private int quantity;
 
-    public BookExample() {
+    public Book() {
     }
 
-    public BookExample(String isbn, String tittle, String category, int quantity) {
+    public Book(String isbn, String tittle, String category, int quantity) {
         this.isbn = isbn;
         this.tittle = tittle;
         this.category = category;
diff --git a/src/main/java/com/example/homework_libraty/models/Issue.java b/src/main/java/com/example/homework_libraty/models/Issue.java
index 5be25165..e0311f34 100644
--- a/src/main/java/com/example/homework_libraty/models/Issue.java
+++ b/src/main/java/com/example/homework_libraty/models/Issue.java
@@ -19,7 +19,7 @@ public class Issue {
 
     @OneToOne
     @JoinColumn(name = "issue_book", referencedColumnName = "isbn")
-    private BookExample issueBook;
+    private Book issueBook;
 
     @OneToOne
     @JoinColumn(name = "issue_student", referencedColumnName = "usn")
@@ -28,7 +28,7 @@ public class Issue {
     public Issue() {
     }
 
-    public Issue(String issueDate, String returnDate, BookExample issueBook, Student issueStudent) {
+    public Issue(String issueDate, String returnDate, Book issueBook, Student issueStudent) {
         this.issueDate = issueDate;
         this.returnDate = returnDate;
         this.issueBook = issueBook;
@@ -59,11 +59,11 @@ public void setReturnDate(String returnDate) {
         this.returnDate = returnDate;
     }
 
-    public BookExample getIssueBook() {
+    public Book getIssueBook() {
         return issueBook;
     }
 
-    public void setIssueBook(BookExample issueBook) {
+    public void setIssueBook(Book issueBook) {
         this.issueBook = issueBook;
     }
 
diff --git a/src/main/java/com/example/homework_libraty/repositories/BookRepository.java b/src/main/java/com/example/homework_libraty/repositories/BookRepository.java
index 3d39111f..28aa2a3d 100644
--- a/src/main/java/com/example/homework_libraty/repositories/BookRepository.java
+++ b/src/main/java/com/example/homework_libraty/repositories/BookRepository.java
@@ -1,7 +1,7 @@
 package com.example.homework_libraty.repositories;
 
-import com.example.homework_libraty.models.BookExample;
+import com.example.homework_libraty.models.Book;
 import org.springframework.data.jpa.repository.JpaRepository;
 
-public interface BookRepository extends JpaRepository<BookExample, String> {
+public interface BookRepository extends JpaRepository<Book, String> {
 }
diff --git a/src/test/java/com/example/homework_libraty/models/BookTest.java b/src/test/java/com/example/homework_libraty/models/BookTest.java
index e302d0d2..b9c2ee28 100644
--- a/src/test/java/com/example/homework_libraty/models/BookTest.java
+++ b/src/test/java/com/example/homework_libraty/models/BookTest.java
@@ -11,7 +11,7 @@
 @SpringBootTest
 class BookTest {
 
-    /*@Autowired
+    @Autowired
     BookRepository bookRepository;
 
     @Test
@@ -20,6 +20,6 @@ void saveBook(){
         Book book = new Book("32fs4r", "El señor de los anillos", "accion", 42);
         bookRepository.save(book);
 
-    }*/
+    }
 
 }
\ No newline at end of file

From 41b75b7e98ffe8ec27a920e8b0ab507c79881ce0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?V=C3=ADctor=20Sanz?= <vsanzc@alumnos.nebrija.es>
Date: Tue, 22 Apr 2025 17:37:17 +0200
Subject: [PATCH 07/21] todo message

---
 .../example/homework_libraty/HomeworkLibratyApplication.java    | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java b/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
index d625b469..717f8b40 100644
--- a/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
+++ b/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
@@ -6,6 +6,8 @@
 @SpringBootApplication
 public class HomeworkLibratyApplication {
 
+	//TODO: implementaciones 3 y 4 de git hub
+
 	public static void main(String[] args) {
 		SpringApplication.run(HomeworkLibratyApplication.class, args);
 	}

From 007ab79da5ce820e4acb1a9a067d1fb9339d7c68 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?V=C3=ADctor=20Sanz?= <vsanzc@alumnos.nebrija.es>
Date: Tue, 22 Apr 2025 17:56:33 +0200
Subject: [PATCH 08/21] Aplicacion prueba

---
 .../HomeworkLibratyApplication.java           | 160 +++++++++++++++++-
 .../repositories/BookRepository.java          |   4 +
 src/main/resources/application.properties     |   2 +-
 3 files changed, 164 insertions(+), 2 deletions(-)

diff --git a/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java b/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
index 717f8b40..80438ad0 100644
--- a/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
+++ b/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
@@ -1,15 +1,173 @@
 package com.example.homework_libraty;
 
+import com.example.homework_libraty.models.Author;
+import com.example.homework_libraty.models.Book;
+import com.example.homework_libraty.repositories.AuthorRepository;
+import com.example.homework_libraty.repositories.BookRepository;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.ConfigurableApplicationContext;
+
+import java.util.NoSuchElementException;
+import java.util.Scanner;
 
 @SpringBootApplication
 public class HomeworkLibratyApplication {
 
+	@Autowired
+	private BookRepository bookRepository;
+
+	@Autowired
+	private AuthorRepository authorRepository;
+
+	// ANSI CODES for colors
+	public static final String RESET = "\u001B[0m";
+	public static final String GREEN = "\u001B[32m";
+	public static final String CYAN = "\u001B[36m";
+	public static final String YELLOW = "\u001B[33m";
+	public static final String RED = "\u001B[31m";
+
+	private final Scanner scanner = new Scanner(System.in);
+
+	public void addBook() {
+		System.out.print("Enter the isbn: ");
+		String isbn = scanner.nextLine().trim();
+		if (isbn.isEmpty()) {
+			throw new IllegalArgumentException("ISBN cannot be empty.");
+		}
+
+		System.out.print("Enter the title of the book: ");
+		String title = scanner.nextLine().trim();
+		if (title.isEmpty()) {
+			throw new IllegalArgumentException("Book title cannot be empty.");
+		}
+
+		System.out.print("Enter the category of the book: ");
+		String category = scanner.nextLine().trim();
+		if (category.isEmpty()) {
+			throw new IllegalArgumentException("Book category cannot be empty.");
+		}
+
+		System.out.print("Enter the author of the book: ");
+		String authorName = scanner.nextLine().trim();
+		if (authorName.isEmpty()) {
+			throw new IllegalArgumentException("Author cannot be empty.");
+		}
+
+		System.out.print("Enter the mail of the author: ");
+		String mail = scanner.nextLine().trim();
+		if (mail.isEmpty()) {
+			throw new IllegalArgumentException("Author mail cannot be empty.");
+		}
+
+		System.out.print("Enter the number of books: ");
+		int booksNumber = Integer.parseInt(scanner.nextLine().trim());
+		if (booksNumber <= 0) {
+			throw new IllegalArgumentException("Book number cannot be 0 or less.");
+		}
+
+		Book book = new Book(isbn, title, category, booksNumber);
+		Author author = new Author(authorName, mail, book);
+
+		bookRepository.save(book);
+		authorRepository.save(author);
+
+		System.out.println("Record created successfully!");
+	}
+
+	public void searchBook() {
+		System.out.print("Enter the title of the book: ");
+		String title = scanner.nextLine().trim();
+		if (title.isEmpty()) {
+			throw new IllegalArgumentException("Book title cannot be empty.");
+		}
+
+		Book book = bookRepository.findByTitle(title);
+		if (book != null) {
+			System.out.println("Book found: " + book);
+		} else {
+			System.out.println("Book not found.");
+		}
+	}
+
+	public void menuDisplay() {
+		System.out.println(GREEN + "\n======== 📖 Iron Library ========" + RESET);
+		System.out.println(CYAN + "1. 📕 Add a book" + RESET);
+		System.out.println(CYAN + "2. 🔎 Search book by title" + RESET);
+		System.out.println(CYAN + "3. 🗂️ Search book by category" + RESET);
+		System.out.println(CYAN + "4. 🖋️ Search book by author" + RESET);
+		System.out.println(CYAN + "5. 📚 List all books along with author" + RESET);
+		System.out.println(CYAN + "6. 🎓 Issue book to student" + RESET);
+		System.out.println(CYAN + "7. 🆔 List books by USN" + RESET);
+		System.out.println(GREEN + "---------------------------------" + RESET);
+		System.out.println(RED + "8. 🚪 Exit" + RESET);
+		System.out.println(GREEN + "=================================" + RESET);
+		System.out.print("Choose an option: ");
+	}
+
+	public void runMenu() {
+		boolean running = true;
+
+		while (running) {
+			try {
+				menuDisplay();
+				String option = scanner.nextLine();
+
+				switch (option) {
+					case "1":
+						addBook();
+						break;
+					case "2":
+						searchBook();
+						break;
+					case "3":
+						// TODO
+						break;
+					case "4":
+						// TODO
+						break;
+					case "5":
+						// TODO
+						break;
+					case "6":
+						// TODO
+						break;
+					case "7":
+						// TODO
+						break;
+					case "8", "exit":
+						running = false;
+						break;
+					default:
+						System.out.println("Invalid option. Please try again.");
+				}
+			} catch (IllegalArgumentException e) {
+				System.out.println("Incorrect argument: " + e.getMessage());
+			} catch (NoSuchElementException e) {
+				System.out.println("Element not found: " + e.getMessage());
+			} catch (Exception e) {
+				System.out.println("An unexpected error occurred: " + e.getMessage());
+			}
+		}
+
+		scanner.close();
+	}
+
 	//TODO: implementaciones 3 y 4 de git hub
 
 	public static void main(String[] args) {
-		SpringApplication.run(HomeworkLibratyApplication.class, args);
+
+		// Run the Spring Boot application
+		ConfigurableApplicationContext context = SpringApplication.run(HomeworkLibratyApplication.class, args);
+
+		// Get the IronlibraryApplication bean from the context
+		HomeworkLibratyApplication app = context.getBean(HomeworkLibratyApplication.class);
+
+		app.runMenu();
+
+		// Close the application context
+		SpringApplication.exit(context);
 	}
 
 }
diff --git a/src/main/java/com/example/homework_libraty/repositories/BookRepository.java b/src/main/java/com/example/homework_libraty/repositories/BookRepository.java
index 28aa2a3d..360a9c9c 100644
--- a/src/main/java/com/example/homework_libraty/repositories/BookRepository.java
+++ b/src/main/java/com/example/homework_libraty/repositories/BookRepository.java
@@ -2,6 +2,10 @@
 
 import com.example.homework_libraty.models.Book;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
 
+@Repository
 public interface BookRepository extends JpaRepository<Book, String> {
+
+    Book findByTitle(String tittle);
 }
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
index d9691582..02e7fc6a 100644
--- a/src/main/resources/application.properties
+++ b/src/main/resources/application.properties
@@ -2,6 +2,6 @@ spring.application.name=homework_libraty
 spring.datasource.url=jdbc:mysql://localhost:3306/lab_library
 spring.datasource.username=root
 spring.datasource.password=admin
-spring.jpa.hibernate.ddl-auto=none
+spring.jpa.hibernate.ddl-auto=update
 spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQLDialect
 

From 073c29c7c5fa81f44ce3c2f6f616ab4d37e67965 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?V=C3=ADctor=20Sanz?= <vsanzc@alumnos.nebrija.es>
Date: Wed, 23 Apr 2025 12:16:50 +0200
Subject: [PATCH 09/21] =?UTF-8?q?git=20example=20a=C3=B1adido?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .gitignore                                        | 2 ++
 src/main/resources/application.properties.example | 6 ++++++
 2 files changed, 8 insertions(+)
 create mode 100644 src/main/resources/application.properties.example

diff --git a/.gitignore b/.gitignore
index b6a95e78..1d249e99 100644
--- a/.gitignore
+++ b/.gitignore
@@ -32,3 +32,5 @@ build/
 
 ### VS Code ###
 .vscode/
+application.properties
+
diff --git a/src/main/resources/application.properties.example b/src/main/resources/application.properties.example
new file mode 100644
index 00000000..64ae825d
--- /dev/null
+++ b/src/main/resources/application.properties.example
@@ -0,0 +1,6 @@
+spring.application.name=myNameExample
+spring.datasource.url=jdbc:mysql://localhost:3306/myDatabaseExample
+spring.datasource.username=myUser
+spring.datasource.password=myPassword
+spring.jpa.hibernate.ddl-auto=validate
+spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQLDialect
\ No newline at end of file

From 4eb20de6f0ce155e8573fc194ac84b600fc0c199 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?V=C3=ADctor=20Sanz?= <vsanzc@alumnos.nebrija.es>
Date: Wed, 23 Apr 2025 12:28:20 +0200
Subject: [PATCH 10/21] Prueba bases de datos remota

---
 pom.xml                                       | 16 ++++--
 .../homework_libraty/models/Author.java       | 35 ++++++------
 .../example/homework_libraty/models/Book.java | 41 +++++++------
 .../homework_libraty/models/Issue.java        | 57 ++++++++++---------
 .../homework_libraty/models/Student.java      | 30 +++++-----
 src/main/resources/application.properties     | 11 ++--
 6 files changed, 103 insertions(+), 87 deletions(-)

diff --git a/pom.xml b/pom.xml
index 97a955f9..d184802e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<parent>
 		<groupId>org.springframework.boot</groupId>
@@ -9,10 +9,10 @@
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>com.example</groupId>
-	<artifactId>homework_libraty</artifactId>
+	<artifactId>ironlibrary</artifactId>
 	<version>0.0.1-SNAPSHOT</version>
-	<name>homework_libraty</name>
-	<description>Demo project for Spring Boot</description>
+	<name>ironlibrary</name>
+	<description> Library Management System</description>
 	<url/>
 	<licenses>
 		<license/>
@@ -49,6 +49,12 @@
 			<artifactId>spring-boot-starter-test</artifactId>
 			<scope>test</scope>
 		</dependency>
+		<dependency>
+			<groupId>org.mariadb.jdbc</groupId>
+			<artifactId>mariadb-java-client</artifactId>
+			<version>3.3.1</version>
+		</dependency>
+
 	</dependencies>
 
 	<build>
@@ -60,4 +66,4 @@
 		</plugins>
 	</build>
 
-</project>
+</project>
\ No newline at end of file
diff --git a/src/main/java/com/example/homework_libraty/models/Author.java b/src/main/java/com/example/homework_libraty/models/Author.java
index cfe8abba..1cc38146 100644
--- a/src/main/java/com/example/homework_libraty/models/Author.java
+++ b/src/main/java/com/example/homework_libraty/models/Author.java
@@ -7,12 +7,13 @@
 public class Author {
 
     @Id
-    @GeneratedValue(strategy = GenerationType.IDENTITY)
-    @Column(name = "author_id")
-    private int id;
+    @GeneratedValue(strategy = jakarta.persistence.GenerationType.IDENTITY)
+    private int authorId;
 
+    @Column(name = "name")
     private String name;
 
+    @Column(name = "email")
     private String email;
 
     @OneToOne
@@ -23,17 +24,17 @@ public Author() {
     }
 
     public Author(String name, String email, Book authorBook) {
-        this.name = name;
-        this.email = email;
-        this.authorBook = authorBook;
+        setName(name);
+        setEmail(email);
+        setAuthorBook(authorBook);
     }
 
-    public int getId() {
-        return id;
+    public int getAuthorId() {
+        return authorId;
     }
 
-    public void setId(int id) {
-        this.id = id;
+    public void setAuthorId(int authorId) {
+        this.authorId = authorId;
     }
 
     public String getName() {
@@ -62,11 +63,11 @@ public void setAuthorBook(Book authorBook) {
 
     @Override
     public String toString() {
-        return "Author{" +
-                "id=" + id +
-                ", name='" + name + '\'' +
-                ", email='" + email + '\'' +
-                ", authorBook=" + authorBook +
-                '}';
+        return "Author {\n" +
+                "    authorId=" + authorId + ",\n" +
+                "    name='" + name + "',\n" +
+                "    email='" + email + "',\n" +
+                "    authorBook=" + authorBook + "\n" +
+                "}";
     }
-}
+}
\ No newline at end of file
diff --git a/src/main/java/com/example/homework_libraty/models/Book.java b/src/main/java/com/example/homework_libraty/models/Book.java
index a2abcf69..a80fccf4 100644
--- a/src/main/java/com/example/homework_libraty/models/Book.java
+++ b/src/main/java/com/example/homework_libraty/models/Book.java
@@ -1,30 +1,35 @@
 package com.example.homework_libraty.models;
 
+import jakarta.persistence.Column;
 import jakarta.persistence.Entity;
 import jakarta.persistence.Id;
 import jakarta.persistence.Table;
 
 @Entity
-@Table(name = "books")
+@Table(name = "book")
 public class Book {
 
     @Id
     private String isbn;
 
-    private String tittle;
+    @Column(name = "title")
+    private String title;
 
+    @Column(name = "category")
     private String category;
 
+    @Column(name = "quantity")
     private int quantity;
 
     public Book() {
+
     }
 
-    public Book(String isbn, String tittle, String category, int quantity) {
-        this.isbn = isbn;
-        this.tittle = tittle;
-        this.category = category;
-        this.quantity = quantity;
+    public Book(String isbn, String title, String category, int quantity) {
+        setIsbn(isbn);
+        setTitle(title);
+        setCategory(category);
+        setQuantity(quantity);
     }
 
     public String getIsbn() {
@@ -35,12 +40,12 @@ public void setIsbn(String isbn) {
         this.isbn = isbn;
     }
 
-    public String getTittle() {
-        return tittle;
+    public String getTitle() {
+        return title;
     }
 
-    public void setTittle(String tittle) {
-        this.tittle = tittle;
+    public void setTitle(String title) {
+        this.title = title;
     }
 
     public String getCategory() {
@@ -61,11 +66,11 @@ public void setQuantity(int quantity) {
 
     @Override
     public String toString() {
-        return "Book{" +
-                "isbn='" + isbn + '\'' +
-                ", tittle='" + tittle + '\'' +
-                ", category='" + category + '\'' +
-                ", quantity=" + quantity +
-                '}';
+        return "Book {\n" +
+                "    isbn='" + isbn + "',\n" +
+                "    title='" + title + "',\n" +
+                "    category='" + category + "',\n" +
+                "    quantity=" + quantity + "\n" +
+                "}";
     }
-}
+}
\ No newline at end of file
diff --git a/src/main/java/com/example/homework_libraty/models/Issue.java b/src/main/java/com/example/homework_libraty/models/Issue.java
index e0311f34..09c16fdc 100644
--- a/src/main/java/com/example/homework_libraty/models/Issue.java
+++ b/src/main/java/com/example/homework_libraty/models/Issue.java
@@ -2,13 +2,14 @@
 
 import jakarta.persistence.*;
 
+import jakarta.persistence.*;
+
 @Entity
-@Table(name = "issues")
+@Table(name = "issue")
 public class Issue {
 
     @Id
-    @GeneratedValue(strategy = GenerationType.IDENTITY)
-    @Column(name = "issue_id")
+    @GeneratedValue(strategy = jakarta.persistence.GenerationType.IDENTITY)
     private int issueId;
 
     @Column(name = "issue_date")
@@ -17,22 +18,22 @@ public class Issue {
     @Column(name = "return_date")
     private String returnDate;
 
-    @OneToOne
-    @JoinColumn(name = "issue_book", referencedColumnName = "isbn")
-    private Book issueBook;
-
     @OneToOne
     @JoinColumn(name = "issue_student", referencedColumnName = "usn")
     private Student issueStudent;
 
+    @OneToOne
+    @JoinColumn(name = "issue_book", referencedColumnName = "isbn")
+    private Book issueBook;
+
     public Issue() {
     }
 
-    public Issue(String issueDate, String returnDate, Book issueBook, Student issueStudent) {
-        this.issueDate = issueDate;
-        this.returnDate = returnDate;
-        this.issueBook = issueBook;
-        this.issueStudent = issueStudent;
+    public Issue(String issueDate, String returnDate, Student issueStudent, Book issueBook) {
+        setIssueDate(issueDate);
+        setReturnDate(returnDate);
+        setIssueStudent(issueStudent);
+        setIssueBook(issueBook);
     }
 
     public int getIssueId() {
@@ -59,14 +60,6 @@ public void setReturnDate(String returnDate) {
         this.returnDate = returnDate;
     }
 
-    public Book getIssueBook() {
-        return issueBook;
-    }
-
-    public void setIssueBook(Book issueBook) {
-        this.issueBook = issueBook;
-    }
-
     public Student getIssueStudent() {
         return issueStudent;
     }
@@ -75,14 +68,22 @@ public void setIssueStudent(Student issueStudent) {
         this.issueStudent = issueStudent;
     }
 
+    public Book getIssueBook() {
+        return issueBook;
+    }
+
+    public void setIssueBook(Book issueBook) {
+        this.issueBook = issueBook;
+    }
+
     @Override
     public String toString() {
-        return "Issue{" +
-                "issueId=" + issueId +
-                ", issueDate='" + issueDate + '\'' +
-                ", returnDate='" + returnDate + '\'' +
-                ", issueBook=" + issueBook +
-                ", issueStudent=" + issueStudent +
-                '}';
+        return "Issue {\n" +
+                "    issueId=" + issueId + ",\n" +
+                "    issueDate='" + issueDate + "',\n" +
+                "    returnDate='" + returnDate + "',\n" +
+                "    issueStudent=" + issueStudent + ",\n" +
+                "    issueBook=" + issueBook + "\n" +
+                "}";
     }
-}
+}
\ No newline at end of file
diff --git a/src/main/java/com/example/homework_libraty/models/Student.java b/src/main/java/com/example/homework_libraty/models/Student.java
index af78eb21..d2b4b197 100644
--- a/src/main/java/com/example/homework_libraty/models/Student.java
+++ b/src/main/java/com/example/homework_libraty/models/Student.java
@@ -1,28 +1,32 @@
 package com.example.homework_libraty.models;
 
-import jakarta.persistence.*;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
 
 @Entity
-@Table(name = "students")
+@Table(name = "student")
 public class Student {
 
     @Id
     private String usn;
 
+    @Column(name = "name")
     private String name;
 
     public Student() {
     }
 
-    public Student(String usn, String name) {
-        this.usn = usn;
-        this.name = name;
-    }
-
     public String getUsn() {
         return usn;
     }
 
+    public Student(String usn, String name) {
+        setUsn(usn);
+        setName(name);
+    }
+
     public void setUsn(String usn) {
         this.usn = usn;
     }
@@ -37,11 +41,9 @@ public void setName(String name) {
 
     @Override
     public String toString() {
-        return "Student{" +
-                "usn='" + usn + '\'' +
-                ", name='" + name + '\'' +
-                '}';
+        return "Student {\n" +
+                "    usn='" + usn + "',\n" +
+                "    name='" + name + "'\n" +
+                "}";
     }
-
-
-}
+}
\ No newline at end of file
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
index 02e7fc6a..755d30cd 100644
--- a/src/main/resources/application.properties
+++ b/src/main/resources/application.properties
@@ -1,7 +1,8 @@
-spring.application.name=homework_libraty
-spring.datasource.url=jdbc:mysql://localhost:3306/lab_library
-spring.datasource.username=root
-spring.datasource.password=admin
+spring.application.name=ironlibrary
 spring.jpa.hibernate.ddl-auto=update
-spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQLDialect
+spring.jpa.show-sql=true
+spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MariaDBDialect
+spring.datasource.url=jdbc:mariadb://tommy.heliohost.org:3306/dsuarezg_ironhack
+spring.datasource.username=dsuarezg_ironhack
+spring.datasource.password=ironlibrary
 

From a4e91046787ec9016d489015f93b5bab4ac5a56d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?V=C3=ADctor=20Sanz?= <vsanzc@alumnos.nebrija.es>
Date: Wed, 23 Apr 2025 12:48:30 +0200
Subject: [PATCH 11/21] =?UTF-8?q?Funcionalidades=20Daniel=20Suarez=20a?=
 =?UTF-8?q?=C3=B1adidas?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../HomeworkLibratyApplication.java           | 26 +++++++++++++++++--
 .../repositories/BookRepository.java          |  4 +++
 2 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java b/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
index 80438ad0..6783582c 100644
--- a/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
+++ b/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
@@ -9,6 +9,7 @@
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.context.ConfigurableApplicationContext;
 
+import java.util.List;
 import java.util.NoSuchElementException;
 import java.util.Scanner;
 
@@ -122,7 +123,7 @@ public void runMenu() {
 						searchBook();
 						break;
 					case "3":
-						// TODO
+						searchBookByCategory();
 						break;
 					case "4":
 						// TODO
@@ -154,7 +155,28 @@ public void runMenu() {
 		scanner.close();
 	}
 
-	//TODO: implementaciones 3 y 4 de git hub
+	public void searchBookByCategory() {
+		List<Book> books;
+		System.out.print("Enter the category of the book: ");
+		String category = scanner.nextLine().trim();
+		if (category.isEmpty()) {
+			throw new IllegalArgumentException("Book category cannot be empty.");
+		}
+
+		books = bookRepository.findByCategory(category);
+		if (!books.isEmpty()) {
+			System.out.println("Books found in category " + category + ":");
+			for (Book book : books) {
+				System.out.println(book);
+			}
+		} else {
+			System.out.println("Book category not found.");
+		}
+	}
+
+
+
+	//TODO: hacer el 5 (List all books along with author) y la 7 (List all books along with author)
 
 	public static void main(String[] args) {
 
diff --git a/src/main/java/com/example/homework_libraty/repositories/BookRepository.java b/src/main/java/com/example/homework_libraty/repositories/BookRepository.java
index 360a9c9c..c8b8a6c7 100644
--- a/src/main/java/com/example/homework_libraty/repositories/BookRepository.java
+++ b/src/main/java/com/example/homework_libraty/repositories/BookRepository.java
@@ -4,8 +4,12 @@
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 
+import java.util.List;
+
 @Repository
 public interface BookRepository extends JpaRepository<Book, String> {
 
     Book findByTitle(String tittle);
+
+    List<Book> findByCategory(String category);
 }

From 60f9caf853897b0d96a5bd7d08f7fc73864ab8a9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?V=C3=ADctor=20Sanz?= <vsanzc@alumnos.nebrija.es>
Date: Wed, 23 Apr 2025 12:54:50 +0200
Subject: [PATCH 12/21] Errata corregida en el parametro title de
 BookRepository

---
 .../example/homework_libraty/HomeworkLibratyApplication.java   | 2 ++
 .../example/homework_libraty/repositories/BookRepository.java  | 3 ++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java b/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
index 6783582c..1ade21f8 100644
--- a/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
+++ b/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
@@ -176,6 +176,8 @@ public void searchBookByCategory() {
 
 
 
+
+
 	//TODO: hacer el 5 (List all books along with author) y la 7 (List all books along with author)
 
 	public static void main(String[] args) {
diff --git a/src/main/java/com/example/homework_libraty/repositories/BookRepository.java b/src/main/java/com/example/homework_libraty/repositories/BookRepository.java
index c8b8a6c7..de393836 100644
--- a/src/main/java/com/example/homework_libraty/repositories/BookRepository.java
+++ b/src/main/java/com/example/homework_libraty/repositories/BookRepository.java
@@ -9,7 +9,8 @@
 @Repository
 public interface BookRepository extends JpaRepository<Book, String> {
 
-    Book findByTitle(String tittle);
+    Book findByTitle(String title);
 
     List<Book> findByCategory(String category);
+
 }

From 2b24d845afd09d34e4e49434adc424ee502c4959 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?V=C3=ADctor=20Sanz?= <vsanzc@alumnos.nebrija.es>
Date: Wed, 23 Apr 2025 15:46:07 +0200
Subject: [PATCH 13/21] busqueda libros realizada

---
 .../HomeworkLibratyApplication.java           | 411 ++++++++++--------
 .../repositories/BookRepository.java          |   4 +
 .../repositories/StudentRepository.java       |   2 +
 .../homework_libraty/models/BookTest.java     |  13 +
 4 files changed, 249 insertions(+), 181 deletions(-)

diff --git a/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java b/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
index 1ade21f8..513ee1fe 100644
--- a/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
+++ b/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
@@ -1,9 +1,7 @@
 package com.example.homework_libraty;
 
-import com.example.homework_libraty.models.Author;
-import com.example.homework_libraty.models.Book;
-import com.example.homework_libraty.repositories.AuthorRepository;
-import com.example.homework_libraty.repositories.BookRepository;
+import com.example.homework_libraty.models.*;
+import com.example.homework_libraty.repositories.*;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
@@ -16,182 +14,233 @@
 @SpringBootApplication
 public class HomeworkLibratyApplication {
 
-	@Autowired
-	private BookRepository bookRepository;
-
-	@Autowired
-	private AuthorRepository authorRepository;
-
-	// ANSI CODES for colors
-	public static final String RESET = "\u001B[0m";
-	public static final String GREEN = "\u001B[32m";
-	public static final String CYAN = "\u001B[36m";
-	public static final String YELLOW = "\u001B[33m";
-	public static final String RED = "\u001B[31m";
-
-	private final Scanner scanner = new Scanner(System.in);
-
-	public void addBook() {
-		System.out.print("Enter the isbn: ");
-		String isbn = scanner.nextLine().trim();
-		if (isbn.isEmpty()) {
-			throw new IllegalArgumentException("ISBN cannot be empty.");
-		}
-
-		System.out.print("Enter the title of the book: ");
-		String title = scanner.nextLine().trim();
-		if (title.isEmpty()) {
-			throw new IllegalArgumentException("Book title cannot be empty.");
-		}
-
-		System.out.print("Enter the category of the book: ");
-		String category = scanner.nextLine().trim();
-		if (category.isEmpty()) {
-			throw new IllegalArgumentException("Book category cannot be empty.");
-		}
-
-		System.out.print("Enter the author of the book: ");
-		String authorName = scanner.nextLine().trim();
-		if (authorName.isEmpty()) {
-			throw new IllegalArgumentException("Author cannot be empty.");
-		}
-
-		System.out.print("Enter the mail of the author: ");
-		String mail = scanner.nextLine().trim();
-		if (mail.isEmpty()) {
-			throw new IllegalArgumentException("Author mail cannot be empty.");
-		}
-
-		System.out.print("Enter the number of books: ");
-		int booksNumber = Integer.parseInt(scanner.nextLine().trim());
-		if (booksNumber <= 0) {
-			throw new IllegalArgumentException("Book number cannot be 0 or less.");
-		}
-
-		Book book = new Book(isbn, title, category, booksNumber);
-		Author author = new Author(authorName, mail, book);
-
-		bookRepository.save(book);
-		authorRepository.save(author);
-
-		System.out.println("Record created successfully!");
-	}
-
-	public void searchBook() {
-		System.out.print("Enter the title of the book: ");
-		String title = scanner.nextLine().trim();
-		if (title.isEmpty()) {
-			throw new IllegalArgumentException("Book title cannot be empty.");
-		}
-
-		Book book = bookRepository.findByTitle(title);
-		if (book != null) {
-			System.out.println("Book found: " + book);
-		} else {
-			System.out.println("Book not found.");
-		}
-	}
-
-	public void menuDisplay() {
-		System.out.println(GREEN + "\n======== 📖 Iron Library ========" + RESET);
-		System.out.println(CYAN + "1. 📕 Add a book" + RESET);
-		System.out.println(CYAN + "2. 🔎 Search book by title" + RESET);
-		System.out.println(CYAN + "3. 🗂️ Search book by category" + RESET);
-		System.out.println(CYAN + "4. 🖋️ Search book by author" + RESET);
-		System.out.println(CYAN + "5. 📚 List all books along with author" + RESET);
-		System.out.println(CYAN + "6. 🎓 Issue book to student" + RESET);
-		System.out.println(CYAN + "7. 🆔 List books by USN" + RESET);
-		System.out.println(GREEN + "---------------------------------" + RESET);
-		System.out.println(RED + "8. 🚪 Exit" + RESET);
-		System.out.println(GREEN + "=================================" + RESET);
-		System.out.print("Choose an option: ");
-	}
-
-	public void runMenu() {
-		boolean running = true;
-
-		while (running) {
-			try {
-				menuDisplay();
-				String option = scanner.nextLine();
-
-				switch (option) {
-					case "1":
-						addBook();
-						break;
-					case "2":
-						searchBook();
-						break;
-					case "3":
-						searchBookByCategory();
-						break;
-					case "4":
-						// TODO
-						break;
-					case "5":
-						// TODO
-						break;
-					case "6":
-						// TODO
-						break;
-					case "7":
-						// TODO
-						break;
-					case "8", "exit":
-						running = false;
-						break;
-					default:
-						System.out.println("Invalid option. Please try again.");
-				}
-			} catch (IllegalArgumentException e) {
-				System.out.println("Incorrect argument: " + e.getMessage());
-			} catch (NoSuchElementException e) {
-				System.out.println("Element not found: " + e.getMessage());
-			} catch (Exception e) {
-				System.out.println("An unexpected error occurred: " + e.getMessage());
-			}
-		}
-
-		scanner.close();
-	}
-
-	public void searchBookByCategory() {
-		List<Book> books;
-		System.out.print("Enter the category of the book: ");
-		String category = scanner.nextLine().trim();
-		if (category.isEmpty()) {
-			throw new IllegalArgumentException("Book category cannot be empty.");
-		}
-
-		books = bookRepository.findByCategory(category);
-		if (!books.isEmpty()) {
-			System.out.println("Books found in category " + category + ":");
-			for (Book book : books) {
-				System.out.println(book);
-			}
-		} else {
-			System.out.println("Book category not found.");
-		}
-	}
-
-
-
-
-
-	//TODO: hacer el 5 (List all books along with author) y la 7 (List all books along with author)
-
-	public static void main(String[] args) {
-
-		// Run the Spring Boot application
-		ConfigurableApplicationContext context = SpringApplication.run(HomeworkLibratyApplication.class, args);
-
-		// Get the IronlibraryApplication bean from the context
-		HomeworkLibratyApplication app = context.getBean(HomeworkLibratyApplication.class);
-
-		app.runMenu();
-
-		// Close the application context
-		SpringApplication.exit(context);
-	}
+    @Autowired
+    private BookRepository bookRepository;
+
+    @Autowired
+    private AuthorRepository authorRepository;
+
+    @Autowired
+    private StudentRepository studentRepository;
+
+    @Autowired
+    private IssuesRepository issuesRepository;
+
+    // ANSI CODES for colors
+    public static final String RESET = "\u001B[0m";
+    public static final String GREEN = "\u001B[32m";
+    public static final String CYAN = "\u001B[36m";
+    public static final String YELLOW = "\u001B[33m";
+    public static final String RED = "\u001B[31m";
+
+    private final Scanner scanner = new Scanner(System.in);
+
+    public void addBook() {
+        System.out.print("Enter the isbn: ");
+        String isbn = scanner.nextLine().trim();
+        if (isbn.isEmpty()) {
+            throw new IllegalArgumentException("ISBN cannot be empty.");
+        }
+
+        System.out.print("Enter the title of the book: ");
+        String title = scanner.nextLine().trim();
+        if (title.isEmpty()) {
+            throw new IllegalArgumentException("Book title cannot be empty.");
+        }
+
+        System.out.print("Enter the category of the book: ");
+        String category = scanner.nextLine().trim();
+        if (category.isEmpty()) {
+            throw new IllegalArgumentException("Book category cannot be empty.");
+        }
+
+        System.out.print("Enter the author of the book: ");
+        String authorName = scanner.nextLine().trim();
+        if (authorName.isEmpty()) {
+            throw new IllegalArgumentException("Author cannot be empty.");
+        }
+
+        System.out.print("Enter the mail of the author: ");
+        String mail = scanner.nextLine().trim();
+        if (mail.isEmpty()) {
+            throw new IllegalArgumentException("Author mail cannot be empty.");
+        }
+
+        System.out.print("Enter the number of books: ");
+        int booksNumber = Integer.parseInt(scanner.nextLine().trim());
+        if (booksNumber <= 0) {
+            throw new IllegalArgumentException("Book number cannot be 0 or less.");
+        }
+
+        Book book = new Book(isbn, title, category, booksNumber);
+        Author author = new Author(authorName, mail, book);
+
+        bookRepository.save(book);
+        authorRepository.save(author);
+
+        System.out.println("Record created successfully!");
+    }
+
+    public void searchBook() {
+        System.out.print("Enter the title of the book: ");
+        String title = scanner.nextLine().trim();
+        if (title.isEmpty()) {
+            throw new IllegalArgumentException("Book title cannot be empty.");
+        }
+
+        Book book = bookRepository.findByTitle(title);
+        if (book != null) {
+            System.out.println("Book found: " + book);
+        } else {
+            System.out.println("Book not found.");
+        }
+    }
+
+    public void issueBook() {
+        System.out.print("Enter the title of the book: ");
+        String title = scanner.nextLine().trim();
+        if (title.isEmpty()) {
+            throw new IllegalArgumentException("Book title cannot be empty.");
+        }
+
+        Book book = bookRepository.findByTitle(title);
+        if (book != null) {
+            System.out.println("Book found: " + book);
+        } else {
+            System.out.println("Book not found.");
+        }
+        System.out.print("Enter student name: ");
+        String studentName = scanner.nextLine().trim();
+        if (studentName.isEmpty()) {
+            throw new IllegalArgumentException("Book title cannot be empty.");
+        }
+        Student student = studentRepository.findByName(studentName);
+        Issue issue = new Issue("23-05-2025", "15-05-2025", student, book);
+        //String issueDate, String returnDate, Student issueStudent, Book issueBook
+        issuesRepository.save(issue);
+
+    }
+
+
+    public void listAllBooks() {
+
+
+        List<Book> allBooks = bookRepository.findAllBooksAndAuthors(); // Devuelve una lista de objetos Book
+
+        System.out.println("===========================================================");
+        System.out.printf("%-20s %-20s %-15s %-15s%n",
+                "Book ISBN", "Book Title", "Category", "Quantity");
+        System.out.println("===========================================================");
+
+        for (Book book : allBooks) {
+            System.out.printf("%-20s %-20s %-15s %-15d%n",
+                    book.getIsbn(), book.getTitle(), book.getCategory(), book.getQuantity());
+        }
+
+        System.out.println("===========================================================");
+
+
+    }
+
+
+
+    public void menuDisplay() {
+        System.out.println(GREEN + "\n======== 📖 Iron Library ========" + RESET);
+        System.out.println(CYAN + "1. 📕 Add a book" + RESET);
+        System.out.println(CYAN + "2. 🔎 Search book by title" + RESET);
+        System.out.println(CYAN + "3. 🗂️ Search book by category" + RESET);
+        System.out.println(CYAN + "4. 🖋️ Search book by author" + RESET);
+        System.out.println(CYAN + "5. 📚 List all books along with author" + RESET);
+        System.out.println(CYAN + "6. 🎓 Issue book to student" + RESET);
+        System.out.println(CYAN + "7. 🆔 List books by USN" + RESET);
+        System.out.println(GREEN + "---------------------------------" + RESET);
+        System.out.println(RED + "8. 🚪 Exit" + RESET);
+        System.out.println(GREEN + "=================================" + RESET);
+        System.out.print("Choose an option: ");
+    }
+
+    public void runMenu() {
+        boolean running = true;
+
+        while (running) {
+            try {
+                menuDisplay();
+                String option = scanner.nextLine();
+
+                switch (option) {
+                    case "1":
+                        addBook();
+                        break;
+                    case "2":
+                        searchBook();
+                        break;
+                    case "3":
+                        searchBookByCategory();
+                        break;
+                    case "4":
+                        // TODO
+                        break;
+                    case "5":
+                        listAllBooks();
+                        break;
+                    case "6":
+                        issueBook();
+                        break;
+                    case "7":
+                        // TODO
+                        break;
+                    case "8", "exit":
+                        running = false;
+                        break;
+                    default:
+                        System.out.println("Invalid option. Please try again.");
+                }
+            } catch (IllegalArgumentException e) {
+                System.out.println("Incorrect argument: " + e.getMessage());
+            } catch (NoSuchElementException e) {
+                System.out.println("Element not found: " + e.getMessage());
+            } catch (Exception e) {
+                System.out.println("An unexpected error occurred: " + e.getMessage());
+            }
+        }
+
+        scanner.close();
+    }
+
+    public void searchBookByCategory() {
+        List<Book> books;
+        System.out.print("Enter the category of the book: ");
+        String category = scanner.nextLine().trim();
+        if (category.isEmpty()) {
+            throw new IllegalArgumentException("Book category cannot be empty.");
+        }
+
+        books = bookRepository.findByCategory(category);
+        if (!books.isEmpty()) {
+            System.out.println("Books found in category " + category + ":");
+            for (Book book : books) {
+                System.out.println(book);
+            }
+        } else {
+            System.out.println("Book category not found.");
+        }
+    }
+
+
+    //TODO: hacer el 5 (List all books along with author) y la 7 (List all books along with author)
+
+    public static void main(String[] args) {
+
+        // Run the Spring Boot application
+        ConfigurableApplicationContext context = SpringApplication.run(HomeworkLibratyApplication.class, args);
+
+        // Get the IronlibraryApplication bean from the context
+        HomeworkLibratyApplication app = context.getBean(HomeworkLibratyApplication.class);
+
+        app.runMenu();
+
+        // Close the application context
+        SpringApplication.exit(context);
+    }
 
 }
diff --git a/src/main/java/com/example/homework_libraty/repositories/BookRepository.java b/src/main/java/com/example/homework_libraty/repositories/BookRepository.java
index de393836..b2c2c149 100644
--- a/src/main/java/com/example/homework_libraty/repositories/BookRepository.java
+++ b/src/main/java/com/example/homework_libraty/repositories/BookRepository.java
@@ -2,6 +2,7 @@
 
 import com.example.homework_libraty.models.Book;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
 import org.springframework.stereotype.Repository;
 
 import java.util.List;
@@ -13,4 +14,7 @@ public interface BookRepository extends JpaRepository<Book, String> {
 
     List<Book> findByCategory(String category);
 
+    @Query("SELECT b FROM Book b")
+    List<Book> findAllBooksAndAuthors();
+
 }
diff --git a/src/main/java/com/example/homework_libraty/repositories/StudentRepository.java b/src/main/java/com/example/homework_libraty/repositories/StudentRepository.java
index 5912af42..153fedcd 100644
--- a/src/main/java/com/example/homework_libraty/repositories/StudentRepository.java
+++ b/src/main/java/com/example/homework_libraty/repositories/StudentRepository.java
@@ -4,4 +4,6 @@
 import org.springframework.data.jpa.repository.JpaRepository;
 
 public interface StudentRepository extends JpaRepository<Student, String> {
+
+    Student findByName(String studentName);
 }
diff --git a/src/test/java/com/example/homework_libraty/models/BookTest.java b/src/test/java/com/example/homework_libraty/models/BookTest.java
index b9c2ee28..e19d38a0 100644
--- a/src/test/java/com/example/homework_libraty/models/BookTest.java
+++ b/src/test/java/com/example/homework_libraty/models/BookTest.java
@@ -6,6 +6,8 @@
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 
+import java.util.List;
+
 import static org.junit.jupiter.api.Assertions.*;
 
 @SpringBootTest
@@ -22,4 +24,15 @@ void saveBook(){
 
     }
 
+    @Test
+    @DisplayName("Buscar todos los libros")
+    void listAllBooks(){
+        List<Book> allBooks = bookRepository.findAllBooksAndAuthors();
+
+        System.out.println("============================");
+        System.out.println("Los libros que hemos encontrado son: ");
+        System.out.println(allBooks);
+        System.out.println("===================");
+    }
+
 }
\ No newline at end of file

From 93ba2fca1f6138a6635a923f30276ad24830e143 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?V=C3=ADctor=20Sanz?= <vsanzc@alumnos.nebrija.es>
Date: Wed, 23 Apr 2025 16:02:50 +0200
Subject: [PATCH 14/21] metodos auxiliares para formatear realizados

---
 .../HomeworkLibratyApplication.java            | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java b/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
index 513ee1fe..fd064c20 100644
--- a/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
+++ b/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
@@ -7,6 +7,8 @@
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.context.ConfigurableApplicationContext;
 
+import java.time.LocalDate;
+import java.time.format.DateTimeFormatter;
 import java.util.List;
 import java.util.NoSuchElementException;
 import java.util.Scanner;
@@ -96,6 +98,7 @@ public void searchBook() {
         }
     }
 
+    //daniM entregar libro
     public void issueBook() {
         System.out.print("Enter the title of the book: ");
         String title = scanner.nextLine().trim();
@@ -115,11 +118,24 @@ public void issueBook() {
             throw new IllegalArgumentException("Book title cannot be empty.");
         }
         Student student = studentRepository.findByName(studentName);
-        Issue issue = new Issue("23-05-2025", "15-05-2025", student, book);
+
+        Issue issue = new Issue(getDate(), getExpiredDate(), student, book);
         //String issueDate, String returnDate, Student issueStudent, Book issueBook
         issuesRepository.save(issue);
 
     }
+    public String getDate(){
+        LocalDate actualDate = LocalDate.now();
+        DateTimeFormatter formatter =DateTimeFormatter.ofPattern("yyyy-mm-aa");
+        String dateString = actualDate.format(formatter);
+        return dateString;
+    }
+    public String getExpiredDate(){
+        LocalDate actualDate = LocalDate.now();
+        LocalDate datePlusWeek=actualDate.plusWeeks(1);
+        DateTimeFormatter formatter =DateTimeFormatter.ofPattern("yyyy-mm-dd");
+        return datePlusWeek.format(formatter);
+    }
 
 
     public void listAllBooks() {

From 2d27e9e516377e6cc963a2f7e7c464a619c5762f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?V=C3=ADctor=20Sanz?= <vsanzc@alumnos.nebrija.es>
Date: Wed, 23 Apr 2025 17:02:10 +0200
Subject: [PATCH 15/21] Funcionalidades mejoradas

---
 .../HomeworkLibratyApplication.java           | 39 ++++++++++++-------
 .../repositories/BookRepository.java          |  4 ++
 2 files changed, 28 insertions(+), 15 deletions(-)

diff --git a/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java b/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
index fd064c20..be39fe09 100644
--- a/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
+++ b/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
@@ -100,28 +100,36 @@ public void searchBook() {
 
     //daniM entregar libro
     public void issueBook() {
-        System.out.print("Enter the title of the book: ");
-        String title = scanner.nextLine().trim();
-        if (title.isEmpty()) {
-            throw new IllegalArgumentException("Book title cannot be empty.");
+        System.out.print("Enter usn: ");
+        String usn = scanner.nextLine().trim();
+        if (usn.isEmpty()) {
+            throw new IllegalArgumentException("usn cannot be empty.");
         }
+        //Student student = studentRepository.findByName(usn);
 
-        Book book = bookRepository.findByTitle(title);
-        if (book != null) {
-            System.out.println("Book found: " + book);
+        System.out.print("Enter name: ");
+        String name = scanner.nextLine().trim();
+        if (name.isEmpty()) {
+            throw new IllegalArgumentException("name cannot be empty.");
+        }
+        Student student = studentRepository.findByName(name);
+
+
+
+        System.out.print("Enter ISBN: ");
+        String isbn = scanner.nextLine().trim();
+        if (isbn.isEmpty()) {
+            System.out.println("Book found: " + isbn);
         } else {
             System.out.println("Book not found.");
         }
-        System.out.print("Enter student name: ");
-        String studentName = scanner.nextLine().trim();
-        if (studentName.isEmpty()) {
-            throw new IllegalArgumentException("Book title cannot be empty.");
-        }
-        Student student = studentRepository.findByName(studentName);
+        Book book = bookRepository.findByIsbn(isbn);
 
         Issue issue = new Issue(getDate(), getExpiredDate(), student, book);
         //String issueDate, String returnDate, Student issueStudent, Book issueBook
+
         issuesRepository.save(issue);
+        System.out.println("Book issued. Return date" + getExpiredDate());
 
     }
     public String getDate(){
@@ -133,8 +141,9 @@ public String getDate(){
     public String getExpiredDate(){
         LocalDate actualDate = LocalDate.now();
         LocalDate datePlusWeek=actualDate.plusWeeks(1);
-        DateTimeFormatter formatter =DateTimeFormatter.ofPattern("yyyy-mm-dd");
-        return datePlusWeek.format(formatter);
+        //DateTimeFormatter formatter =DateTimeFormatter.ofPattern("yyyy-mm-dd");
+        //return datePlusWeek.format(formatter);
+        return datePlusWeek.toString();
     }
 
 
diff --git a/src/main/java/com/example/homework_libraty/repositories/BookRepository.java b/src/main/java/com/example/homework_libraty/repositories/BookRepository.java
index b2c2c149..5338742d 100644
--- a/src/main/java/com/example/homework_libraty/repositories/BookRepository.java
+++ b/src/main/java/com/example/homework_libraty/repositories/BookRepository.java
@@ -17,4 +17,8 @@ public interface BookRepository extends JpaRepository<Book, String> {
     @Query("SELECT b FROM Book b")
     List<Book> findAllBooksAndAuthors();
 
+    Book findByIsbn(String isbn);
+
+
+
 }

From fd264bc129f0a215172b576a175fbeeafce48823 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?V=C3=ADctor=20Sanz?= <vsanzc@alumnos.nebrija.es>
Date: Wed, 23 Apr 2025 17:06:08 +0200
Subject: [PATCH 16/21] Salida formateada

---
 .../example/homework_libraty/HomeworkLibratyApplication.java  | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java b/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
index be39fe09..fd6c3fa0 100644
--- a/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
+++ b/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
@@ -153,12 +153,12 @@ public void listAllBooks() {
         List<Book> allBooks = bookRepository.findAllBooksAndAuthors(); // Devuelve una lista de objetos Book
 
         System.out.println("===========================================================");
-        System.out.printf("%-20s %-20s %-15s %-15s%n",
+        System.out.printf("%-25s %-30s %-20s %-10s%n",
                 "Book ISBN", "Book Title", "Category", "Quantity");
         System.out.println("===========================================================");
 
         for (Book book : allBooks) {
-            System.out.printf("%-20s %-20s %-15s %-15d%n",
+            System.out.printf("%-25s %-30s %-20s %-10d%n",
                     book.getIsbn(), book.getTitle(), book.getCategory(), book.getQuantity());
         }
 

From b06b90ef8e1a62db2108f00c60424e87efb8b547 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Su=C3=A1rez=20Garc=C3=ADa?= <dsuarezg@uoc.edu>
Date: Wed, 23 Apr 2025 17:40:46 +0200
Subject: [PATCH 17/21] Refactor Name

---
 .../HomeworkLibraryApplication.java}                 | 12 ++++++------
 .../models/Author.java                               |  2 +-
 .../models/Book.java                                 |  2 +-
 .../models/Issue.java                                |  4 +---
 .../models/Student.java                              |  2 +-
 .../repositories/AuthorRepository.java               |  4 ++--
 .../repositories/BookRepository.java                 |  4 ++--
 .../repositories/IssuesRepository.java               |  4 ++--
 .../repositories/StudentRepository.java              |  4 ++--
 .../HomeworkLibraryApplicationTests.java}            |  4 ++--
 .../models/BookTest.java                             |  6 ++----
 .../models/StudentTest.java                          |  6 ++----
 12 files changed, 24 insertions(+), 30 deletions(-)
 rename src/main/java/com/example/{homework_libraty/HomeworkLibratyApplication.java => homework_library/HomeworkLibraryApplication.java} (96%)
 rename src/main/java/com/example/{homework_libraty => homework_library}/models/Author.java (97%)
 rename src/main/java/com/example/{homework_libraty => homework_library}/models/Book.java (97%)
 rename src/main/java/com/example/{homework_libraty => homework_library}/models/Issue.java (96%)
 rename src/main/java/com/example/{homework_libraty => homework_library}/models/Student.java (95%)
 rename src/main/java/com/example/{homework_libraty => homework_library}/repositories/AuthorRepository.java (58%)
 rename src/main/java/com/example/{homework_libraty => homework_library}/repositories/BookRepository.java (82%)
 rename src/main/java/com/example/{homework_libraty => homework_library}/repositories/IssuesRepository.java (58%)
 rename src/main/java/com/example/{homework_libraty => homework_library}/repositories/StudentRepository.java (64%)
 rename src/test/java/com/example/{homework_libraty/HomeworkLibratyApplicationTests.java => homework_library/HomeworkLibraryApplicationTests.java} (65%)
 rename src/test/java/com/example/{homework_libraty => homework_library}/models/BookTest.java (84%)
 rename src/test/java/com/example/{homework_libraty => homework_library}/models/StudentTest.java (75%)

diff --git a/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java b/src/main/java/com/example/homework_library/HomeworkLibraryApplication.java
similarity index 96%
rename from src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
rename to src/main/java/com/example/homework_library/HomeworkLibraryApplication.java
index fd6c3fa0..575596c4 100644
--- a/src/main/java/com/example/homework_libraty/HomeworkLibratyApplication.java
+++ b/src/main/java/com/example/homework_library/HomeworkLibraryApplication.java
@@ -1,7 +1,7 @@
-package com.example.homework_libraty;
+package com.example.homework_library;
 
-import com.example.homework_libraty.models.*;
-import com.example.homework_libraty.repositories.*;
+import com.example.homework_library.models.*;
+import com.example.homework_library.repositories.*;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
@@ -14,7 +14,7 @@
 import java.util.Scanner;
 
 @SpringBootApplication
-public class HomeworkLibratyApplication {
+public class HomeworkLibraryApplication {
 
     @Autowired
     private BookRepository bookRepository;
@@ -257,10 +257,10 @@ public void searchBookByCategory() {
     public static void main(String[] args) {
 
         // Run the Spring Boot application
-        ConfigurableApplicationContext context = SpringApplication.run(HomeworkLibratyApplication.class, args);
+        ConfigurableApplicationContext context = SpringApplication.run(HomeworkLibraryApplication.class, args);
 
         // Get the IronlibraryApplication bean from the context
-        HomeworkLibratyApplication app = context.getBean(HomeworkLibratyApplication.class);
+        HomeworkLibraryApplication app = context.getBean(HomeworkLibraryApplication.class);
 
         app.runMenu();
 
diff --git a/src/main/java/com/example/homework_libraty/models/Author.java b/src/main/java/com/example/homework_library/models/Author.java
similarity index 97%
rename from src/main/java/com/example/homework_libraty/models/Author.java
rename to src/main/java/com/example/homework_library/models/Author.java
index 1cc38146..2a8d50a5 100644
--- a/src/main/java/com/example/homework_libraty/models/Author.java
+++ b/src/main/java/com/example/homework_library/models/Author.java
@@ -1,4 +1,4 @@
-package com.example.homework_libraty.models;
+package com.example.homework_library.models;
 
 import jakarta.persistence.*;
 
diff --git a/src/main/java/com/example/homework_libraty/models/Book.java b/src/main/java/com/example/homework_library/models/Book.java
similarity index 97%
rename from src/main/java/com/example/homework_libraty/models/Book.java
rename to src/main/java/com/example/homework_library/models/Book.java
index a80fccf4..8d3b4a46 100644
--- a/src/main/java/com/example/homework_libraty/models/Book.java
+++ b/src/main/java/com/example/homework_library/models/Book.java
@@ -1,4 +1,4 @@
-package com.example.homework_libraty.models;
+package com.example.homework_library.models;
 
 import jakarta.persistence.Column;
 import jakarta.persistence.Entity;
diff --git a/src/main/java/com/example/homework_libraty/models/Issue.java b/src/main/java/com/example/homework_library/models/Issue.java
similarity index 96%
rename from src/main/java/com/example/homework_libraty/models/Issue.java
rename to src/main/java/com/example/homework_library/models/Issue.java
index 09c16fdc..a67b14c5 100644
--- a/src/main/java/com/example/homework_libraty/models/Issue.java
+++ b/src/main/java/com/example/homework_library/models/Issue.java
@@ -1,6 +1,4 @@
-package com.example.homework_libraty.models;
-
-import jakarta.persistence.*;
+package com.example.homework_library.models;
 
 import jakarta.persistence.*;
 
diff --git a/src/main/java/com/example/homework_libraty/models/Student.java b/src/main/java/com/example/homework_library/models/Student.java
similarity index 95%
rename from src/main/java/com/example/homework_libraty/models/Student.java
rename to src/main/java/com/example/homework_library/models/Student.java
index d2b4b197..0d5229ea 100644
--- a/src/main/java/com/example/homework_libraty/models/Student.java
+++ b/src/main/java/com/example/homework_library/models/Student.java
@@ -1,4 +1,4 @@
-package com.example.homework_libraty.models;
+package com.example.homework_library.models;
 
 import jakarta.persistence.Column;
 import jakarta.persistence.Entity;
diff --git a/src/main/java/com/example/homework_libraty/repositories/AuthorRepository.java b/src/main/java/com/example/homework_library/repositories/AuthorRepository.java
similarity index 58%
rename from src/main/java/com/example/homework_libraty/repositories/AuthorRepository.java
rename to src/main/java/com/example/homework_library/repositories/AuthorRepository.java
index 17007b63..ea2ef93a 100644
--- a/src/main/java/com/example/homework_libraty/repositories/AuthorRepository.java
+++ b/src/main/java/com/example/homework_library/repositories/AuthorRepository.java
@@ -1,6 +1,6 @@
-package com.example.homework_libraty.repositories;
+package com.example.homework_library.repositories;
 
-import com.example.homework_libraty.models.Author;
+import com.example.homework_library.models.Author;
 import org.springframework.data.jpa.repository.JpaRepository;
 
 public interface AuthorRepository extends JpaRepository<Author, Integer> {
diff --git a/src/main/java/com/example/homework_libraty/repositories/BookRepository.java b/src/main/java/com/example/homework_library/repositories/BookRepository.java
similarity index 82%
rename from src/main/java/com/example/homework_libraty/repositories/BookRepository.java
rename to src/main/java/com/example/homework_library/repositories/BookRepository.java
index 5338742d..cbb27682 100644
--- a/src/main/java/com/example/homework_libraty/repositories/BookRepository.java
+++ b/src/main/java/com/example/homework_library/repositories/BookRepository.java
@@ -1,6 +1,6 @@
-package com.example.homework_libraty.repositories;
+package com.example.homework_library.repositories;
 
-import com.example.homework_libraty.models.Book;
+import com.example.homework_library.models.Book;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.Query;
 import org.springframework.stereotype.Repository;
diff --git a/src/main/java/com/example/homework_libraty/repositories/IssuesRepository.java b/src/main/java/com/example/homework_library/repositories/IssuesRepository.java
similarity index 58%
rename from src/main/java/com/example/homework_libraty/repositories/IssuesRepository.java
rename to src/main/java/com/example/homework_library/repositories/IssuesRepository.java
index f75d0dba..37158c4e 100644
--- a/src/main/java/com/example/homework_libraty/repositories/IssuesRepository.java
+++ b/src/main/java/com/example/homework_library/repositories/IssuesRepository.java
@@ -1,6 +1,6 @@
-package com.example.homework_libraty.repositories;
+package com.example.homework_library.repositories;
 
-import com.example.homework_libraty.models.Issue;
+import com.example.homework_library.models.Issue;
 import org.springframework.data.jpa.repository.JpaRepository;
 
 public interface IssuesRepository extends JpaRepository<Issue, Integer> {
diff --git a/src/main/java/com/example/homework_libraty/repositories/StudentRepository.java b/src/main/java/com/example/homework_library/repositories/StudentRepository.java
similarity index 64%
rename from src/main/java/com/example/homework_libraty/repositories/StudentRepository.java
rename to src/main/java/com/example/homework_library/repositories/StudentRepository.java
index 153fedcd..db3e1255 100644
--- a/src/main/java/com/example/homework_libraty/repositories/StudentRepository.java
+++ b/src/main/java/com/example/homework_library/repositories/StudentRepository.java
@@ -1,6 +1,6 @@
-package com.example.homework_libraty.repositories;
+package com.example.homework_library.repositories;
 
-import com.example.homework_libraty.models.Student;
+import com.example.homework_library.models.Student;
 import org.springframework.data.jpa.repository.JpaRepository;
 
 public interface StudentRepository extends JpaRepository<Student, String> {
diff --git a/src/test/java/com/example/homework_libraty/HomeworkLibratyApplicationTests.java b/src/test/java/com/example/homework_library/HomeworkLibraryApplicationTests.java
similarity index 65%
rename from src/test/java/com/example/homework_libraty/HomeworkLibratyApplicationTests.java
rename to src/test/java/com/example/homework_library/HomeworkLibraryApplicationTests.java
index e358d86e..e889a16b 100644
--- a/src/test/java/com/example/homework_libraty/HomeworkLibratyApplicationTests.java
+++ b/src/test/java/com/example/homework_library/HomeworkLibraryApplicationTests.java
@@ -1,10 +1,10 @@
-package com.example.homework_libraty;
+package com.example.homework_library;
 
 import org.junit.jupiter.api.Test;
 import org.springframework.boot.test.context.SpringBootTest;
 
 @SpringBootTest
-class HomeworkLibratyApplicationTests {
+class HomeworkLibraryApplicationTests {
 
 	@Test
 	void contextLoads() {
diff --git a/src/test/java/com/example/homework_libraty/models/BookTest.java b/src/test/java/com/example/homework_library/models/BookTest.java
similarity index 84%
rename from src/test/java/com/example/homework_libraty/models/BookTest.java
rename to src/test/java/com/example/homework_library/models/BookTest.java
index e19d38a0..55bfb5ea 100644
--- a/src/test/java/com/example/homework_libraty/models/BookTest.java
+++ b/src/test/java/com/example/homework_library/models/BookTest.java
@@ -1,6 +1,6 @@
-package com.example.homework_libraty.models;
+package com.example.homework_library.models;
 
-import com.example.homework_libraty.repositories.BookRepository;
+import com.example.homework_library.repositories.BookRepository;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -8,8 +8,6 @@
 
 import java.util.List;
 
-import static org.junit.jupiter.api.Assertions.*;
-
 @SpringBootTest
 class BookTest {
 
diff --git a/src/test/java/com/example/homework_libraty/models/StudentTest.java b/src/test/java/com/example/homework_library/models/StudentTest.java
similarity index 75%
rename from src/test/java/com/example/homework_libraty/models/StudentTest.java
rename to src/test/java/com/example/homework_library/models/StudentTest.java
index caec7664..6ac66349 100644
--- a/src/test/java/com/example/homework_libraty/models/StudentTest.java
+++ b/src/test/java/com/example/homework_library/models/StudentTest.java
@@ -1,13 +1,11 @@
-package com.example.homework_libraty.models;
+package com.example.homework_library.models;
 
-import com.example.homework_libraty.repositories.StudentRepository;
+import com.example.homework_library.repositories.StudentRepository;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 
-import static org.junit.jupiter.api.Assertions.*;
-
 @SpringBootTest
 class StudentTest {
 

From 171483cf4cab50eb9715229e1f00ed7a25c0ec93 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Su=C3=A1rez=20Garc=C3=ADa?= <dsuarezg@uoc.edu>
Date: Tue, 29 Apr 2025 11:49:39 +0200
Subject: [PATCH 18/21] Improved Main Functions

---
 .../HomeworkLibraryApplication.java           | 87 ++++++++++++-------
 .../repositories/AuthorRepository.java        | 15 ++++
 .../repositories/BookRepository.java          |  5 ++
 .../repositories/IssuesRepository.java        | 10 +++
 .../repositories/StudentRepository.java       |  4 +
 .../homework_library/models/StudentTest.java  | 15 +++-
 6 files changed, 104 insertions(+), 32 deletions(-)

diff --git a/src/main/java/com/example/homework_library/HomeworkLibraryApplication.java b/src/main/java/com/example/homework_library/HomeworkLibraryApplication.java
index 575596c4..c4f92554 100644
--- a/src/main/java/com/example/homework_library/HomeworkLibraryApplication.java
+++ b/src/main/java/com/example/homework_library/HomeworkLibraryApplication.java
@@ -28,7 +28,6 @@ public class HomeworkLibraryApplication {
     @Autowired
     private IssuesRepository issuesRepository;
 
-    // ANSI CODES for colors
     public static final String RESET = "\u001B[0m";
     public static final String GREEN = "\u001B[32m";
     public static final String CYAN = "\u001B[36m";
@@ -98,51 +97,54 @@ public void searchBook() {
         }
     }
 
-    //daniM entregar libro
     public void issueBook() {
         System.out.print("Enter usn: ");
         String usn = scanner.nextLine().trim();
-        if (usn.isEmpty()) {
+        if (usn.isEmpty() || findIssueWithUSN(usn) != null) {
             throw new IllegalArgumentException("usn cannot be empty.");
         }
-        //Student student = studentRepository.findByName(usn);
-
-        System.out.print("Enter name: ");
-        String name = scanner.nextLine().trim();
-        if (name.isEmpty()) {
-            throw new IllegalArgumentException("name cannot be empty.");
-        }
-        Student student = studentRepository.findByName(name);
 
+        Student student = studentRepository.findStudentByUsn(usn);
 
 
         System.out.print("Enter ISBN: ");
         String isbn = scanner.nextLine().trim();
-        if (isbn.isEmpty()) {
-            System.out.println("Book found: " + isbn);
-        } else {
-            System.out.println("Book not found.");
+        if (isbn.isEmpty() || findIssueWithISBN(isbn) != null) {
+            throw new IllegalArgumentException("isbn cannot be empty.");
         }
+
         Book book = bookRepository.findByIsbn(isbn);
 
-        Issue issue = new Issue(getDate(), getExpiredDate(), student, book);
-        //String issueDate, String returnDate, Student issueStudent, Book issueBook
+        issuesRepository.save(new Issue(getDate(), getExpiredDate(), student, book));
+        System.out.println("Book issued. Return date: " + getExpiredDate());
+    }
+
+    public Student findIssueWithUSN(String usn) {
+        if (usn.isEmpty()) {
+            throw new IllegalArgumentException("usn cannot be empty.");
+        }
+        return issuesRepository.findIssuesByIssueStudent_Usn(usn).getIssueStudent();
+
+    }
+
 
-        issuesRepository.save(issue);
-        System.out.println("Book issued. Return date" + getExpiredDate());
+    public Book findIssueWithISBN(String isbn) {
+        if (isbn.isEmpty()) {
+            throw new IllegalArgumentException("isbn cannot be empty.");
+        }
+        return issuesRepository.findIssuesByIssueBook_Isbn(isbn).getIssueBook();
 
     }
-    public String getDate(){
+
+    public String getDate() {
         LocalDate actualDate = LocalDate.now();
-        DateTimeFormatter formatter =DateTimeFormatter.ofPattern("yyyy-mm-aa");
-        String dateString = actualDate.format(formatter);
-        return dateString;
+        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
+        return actualDate.format(formatter);
     }
-    public String getExpiredDate(){
+
+    public String getExpiredDate() {
         LocalDate actualDate = LocalDate.now();
-        LocalDate datePlusWeek=actualDate.plusWeeks(1);
-        //DateTimeFormatter formatter =DateTimeFormatter.ofPattern("yyyy-mm-dd");
-        //return datePlusWeek.format(formatter);
+        LocalDate datePlusWeek = actualDate.plusWeeks(1);
         return datePlusWeek.toString();
     }
 
@@ -167,7 +169,32 @@ public void listAllBooks() {
 
     }
 
+    public void listAllBooksByUSN() {
+        System.out.print("Enter usn: ");
+        String usn = scanner.nextLine().trim();
+        Issue issue = issuesRepository.findIssuesByIssueStudent_Usn(usn);
+        if (issue != null) {
+            System.out.println("Book found: " + issue.getIssueBook());
+        } else {
+            System.out.println("Book not found.");
+        }
+    }
 
+    public void findBookByAuthor() {
+        System.out.print("Enter the author of the book: ");
+        String authorName = scanner.nextLine().trim();
+        if (authorName.isEmpty()) {
+            throw new IllegalArgumentException("Author cannot be empty.");
+        }
+
+        Book book = authorRepository.findByName(authorName).getAuthorBook();
+        if (book != null) {
+            System.out.println("Book found: " + book);
+        } else {
+            System.out.println("Book not found.");
+        }
+
+    }
 
     public void menuDisplay() {
         System.out.println(GREEN + "\n======== 📖 Iron Library ========" + RESET);
@@ -203,7 +230,7 @@ public void runMenu() {
                         searchBookByCategory();
                         break;
                     case "4":
-                        // TODO
+                        findBookByAuthor();
                         break;
                     case "5":
                         listAllBooks();
@@ -212,7 +239,7 @@ public void runMenu() {
                         issueBook();
                         break;
                     case "7":
-                        // TODO
+                        listAllBooksByUSN();
                         break;
                     case "8", "exit":
                         running = false;
@@ -252,8 +279,6 @@ public void searchBookByCategory() {
     }
 
 
-    //TODO: hacer el 5 (List all books along with author) y la 7 (List all books along with author)
-
     public static void main(String[] args) {
 
         // Run the Spring Boot application
diff --git a/src/main/java/com/example/homework_library/repositories/AuthorRepository.java b/src/main/java/com/example/homework_library/repositories/AuthorRepository.java
index ea2ef93a..b94646b3 100644
--- a/src/main/java/com/example/homework_library/repositories/AuthorRepository.java
+++ b/src/main/java/com/example/homework_library/repositories/AuthorRepository.java
@@ -1,7 +1,22 @@
 package com.example.homework_library.repositories;
 
 import com.example.homework_library.models.Author;
+import com.example.homework_library.models.Book;
+
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+import java.util.List;
 
+@Repository
 public interface AuthorRepository extends JpaRepository<Author, Integer> {
+
+   // Book findByIsbn(String isbn);
+    Author findByName(String authorName);
+
+
+
+
+
 }
+
diff --git a/src/main/java/com/example/homework_library/repositories/BookRepository.java b/src/main/java/com/example/homework_library/repositories/BookRepository.java
index cbb27682..d6daf452 100644
--- a/src/main/java/com/example/homework_library/repositories/BookRepository.java
+++ b/src/main/java/com/example/homework_library/repositories/BookRepository.java
@@ -1,5 +1,6 @@
 package com.example.homework_library.repositories;
 
+import com.example.homework_library.models.Author;
 import com.example.homework_library.models.Book;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.Query;
@@ -21,4 +22,8 @@ public interface BookRepository extends JpaRepository<Book, String> {
 
 
 
+
+
+
+
 }
diff --git a/src/main/java/com/example/homework_library/repositories/IssuesRepository.java b/src/main/java/com/example/homework_library/repositories/IssuesRepository.java
index 37158c4e..ca64efbe 100644
--- a/src/main/java/com/example/homework_library/repositories/IssuesRepository.java
+++ b/src/main/java/com/example/homework_library/repositories/IssuesRepository.java
@@ -1,7 +1,17 @@
 package com.example.homework_library.repositories;
 
 import com.example.homework_library.models.Issue;
+import com.example.homework_library.models.Student;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
 
+import java.util.List;
+
+@Repository
 public interface IssuesRepository extends JpaRepository<Issue, Integer> {
+
+    //List<Issue> findIssuesByIssueStudent_Usn(String issueStudentUsn);
+    Issue findIssuesByIssueStudent_Usn(String issueStudentUsn);
+    Issue findIssuesByIssueBook_Isbn(String issueBookIsbn);
+
 }
diff --git a/src/main/java/com/example/homework_library/repositories/StudentRepository.java b/src/main/java/com/example/homework_library/repositories/StudentRepository.java
index db3e1255..a65f3d74 100644
--- a/src/main/java/com/example/homework_library/repositories/StudentRepository.java
+++ b/src/main/java/com/example/homework_library/repositories/StudentRepository.java
@@ -1,9 +1,13 @@
 package com.example.homework_library.repositories;
 
 import com.example.homework_library.models.Student;
+import jdk.jfr.Registered;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
 
+@Repository
 public interface StudentRepository extends JpaRepository<Student, String> {
 
     Student findByName(String studentName);
+    Student findStudentByUsn(String usn);
 }
diff --git a/src/test/java/com/example/homework_library/models/StudentTest.java b/src/test/java/com/example/homework_library/models/StudentTest.java
index 6ac66349..f8aeeb7b 100644
--- a/src/test/java/com/example/homework_library/models/StudentTest.java
+++ b/src/test/java/com/example/homework_library/models/StudentTest.java
@@ -1,10 +1,12 @@
 package com.example.homework_library.models;
 
 import com.example.homework_library.repositories.StudentRepository;
+import jakarta.transaction.Transactional;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.annotation.Rollback;
 
 @SpringBootTest
 class StudentTest {
@@ -14,10 +16,21 @@ class StudentTest {
 
     @Test
     @DisplayName("Guardo un estudiante en la base de datos")
+    @Transactional
+    @Rollback(false)
     void saveStudent(){
-        Student student = new Student("843t", "Daniel");
+        Student student = new Student("123a", "Daniel");
 
         studentRepository.save(student);
     }
 
+    @Test
+    @DisplayName("Listar todos los estudiantes")
+    void findAll(){
+        System.out.println("============================");
+        System.out.println("Los estudiantes que hemos encontrado son: ");
+        System.out.println(studentRepository.findAll());
+        System.out.println("===================");
+    }
+
 }
\ No newline at end of file

From 1e878a2c0f90b2e66fe65e8709de0f06b3020110 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Su=C3=A1rez=20Garc=C3=ADa?= <dsuarezg@uoc.edu>
Date: Wed, 30 Apr 2025 13:33:24 +0200
Subject: [PATCH 19/21] Final Version

---
 Instructions.md                               | 188 ++++++++++
 README.md                                     | 194 +++--------
 pom.xml                                       |  19 +-
 .../HomeworkLibraryApplication.java           | 323 ++++++------------
 .../repositories/IssuesRepository.java        |   2 +
 .../services/AuthorService.java               |  25 ++
 .../services/BookService.java                 |  53 +++
 .../services/IssueService.java                |  70 ++++
 .../services/StudentService.java              |  25 ++
 .../HomeworkLibraryApplicationTests.java      |  13 -
 .../homework_library/models/BookTest.java     |  36 --
 .../homework_library/models/StudentTest.java  |  36 --
 .../services/BookServiceTest.java             |  99 ++++++
 .../services/IssueServiceTest.java            |  61 ++++
 .../services/StudentServiceTest.java          |  49 +++
 15 files changed, 742 insertions(+), 451 deletions(-)
 create mode 100644 Instructions.md
 create mode 100644 src/main/java/com/example/homework_library/services/AuthorService.java
 create mode 100644 src/main/java/com/example/homework_library/services/BookService.java
 create mode 100644 src/main/java/com/example/homework_library/services/IssueService.java
 create mode 100644 src/main/java/com/example/homework_library/services/StudentService.java
 delete mode 100644 src/test/java/com/example/homework_library/HomeworkLibraryApplicationTests.java
 delete mode 100644 src/test/java/com/example/homework_library/models/BookTest.java
 delete mode 100644 src/test/java/com/example/homework_library/models/StudentTest.java
 create mode 100644 src/test/java/com/example/homework_library/services/BookServiceTest.java
 create mode 100644 src/test/java/com/example/homework_library/services/IssueServiceTest.java
 create mode 100644 src/test/java/com/example/homework_library/services/StudentServiceTest.java

diff --git a/Instructions.md b/Instructions.md
new file mode 100644
index 00000000..df676c12
--- /dev/null
+++ b/Instructions.md
@@ -0,0 +1,188 @@
+![logo_ironhack_blue 7](https://user-images.githubusercontent.com/23629340/40541063-a07a0a8a-601a-11e8-91b5-2f13e4e6b441.png)
+
+# HW | Java IronLibrary (Unit 3 homework)
+
+## Introduction
+
+For this homework, you will be building a Library Management System, that will help managing and acquiring data about the books that are being used by students.
+
+## Instructions
+
+Let's walk through the details of the homework:
+
+### Classes
+
+Four main classes are necessary to complete this homework.
+
+These classes will be called **Author**, **Book**, **Student** and **Issue**.
+
+<br>
+
+**Book class**
+
+This class will have:
+
+- Variable called `isbn` of data type `string`, representing the **International Standard Book Number** and acting as the unique identifier for the table book (Private member)
+- Variable called `title` of data type `string` (Private member)
+- Variable called `category` of data type `string` (Private member)
+- Variable called `quantity` of data type `integer` (Private member)
+- A parameterized constructor that takes `isbn`, `title`, `category` and a `quantity`
+- Public Getter functions to access these variables
+- Public Setter functions to change these variables
+- Optional attributes are accepted if needed based on the code structure
+
+<br>
+
+**Author class**
+
+This class will have:
+
+- Variable called `authorId` of data type `integer`, auto-incremented (Private member)
+- Variable called `name` of data type `string` (Private member)
+- Variable called `email` of data type `string` (Private member)
+- Variable called `authorBook` of data type `Book`, representing a One-to-One relationship with `Book` (Private member)
+- A parameterized constructor that takes `name`, `email` and `authorBook`
+- Public Getter functions to access these variables
+- Public Setter functions to change these variables
+- Optional attributes are accepted if needed based on the code structure
+
+<br>
+
+**Issue class**
+
+This class will have:
+
+- Variable called `issueId` of data type `integer`, auto-incremented (Private member)
+- Variable called `issueDate` of data type `string` (Private member)
+- Variable called `returnDate` of data type `string` (Private member)
+- Variable called `issueStudent` of data type `Student`, representing a One-to-One relationship with `Student`(Private member)
+- Variable called `issueBook` of data type `Book`, representing a One-to-One relationship with `Book` (Private member)
+- A parameterized constructor that takes `issueDate`, `returnDate`, `issueStudent` and `issueBook`
+- Public Getter functions to access these variables
+- Public Setter functions to change these variables
+- Optional attributes are accepted if needed based on the code structure
+
+<br>
+
+**Student class**
+
+This class will have:
+
+- Variable called `usn` of data type `string`, representing the **Universal Student Number** and acting as the unique identifier for the table student (Private member)
+- Variable called `name` of data type `string` (Private member)
+- A parameterized constructor that takes `usn` and `name`
+- Public Getter functions to access these variables
+- Public Setter functions to change these variables
+- Optional attributes are accepted if needed based on the code structure
+
+## How the application works
+
+After starting this application, a list of options will pop up for the user. The user will be asked to input a number based on the list of options displayed, such as adding a book, searching for a book, issuing a book for a student, etc.
+After a certain action is executed, the menu is re-displayed for the user automatically.
+
+The menu should have the following options:
+
+1. Add a book
+2. Search book by title
+3. Search book by category
+4. Search book by Author
+5. List all books along with author
+6. Issue book to student
+7. List books by usn
+8. Exit
+
+## Actions
+
+1. **Add a book**: This action is responsible of adding a book and its author in the system. The user will be prompted to enter the details of both the book and the author in the following format:
+
+```
+Enter your choice: 1
+Enter isbn : 978-3-16-148410-0
+Enter title : The Notebook
+Enter category : Romance
+Enter Author name : Nicholas Sparks
+Enter Author mail : nicholassparks@gmail.com
+Enter number of books : 4
+```
+
+2. **Search book by title**: This action is responsible for searching a book by title.
+
+```
+Enter your choice: 2
+Enter title : The Notebook
+
+Book ISBN               Book Title          Category    No of Books
+978-3-16-148410-0       The Notebook        Romance     4
+```
+
+3. **Search book by category**: This action is responsible for searching a book by category.
+
+```
+Enter your choice: 3
+Enter category : Romance
+
+Book ISBN               Book Title          Category    No of Books
+978-3-16-148410-0       The Notebook        Romance     4
+```
+
+4. **Search book by author**: This action is responsible for searching a book by author name.
+
+```
+Enter your choice: 4
+Enter name : Nicholas Sparks
+
+Book ISBN               Book Title          Category    No of Books
+978-3-16-148410-0       The Notebook        Romance     4
+```
+
+5. **List all books along with author**: This action is responsible for listing all the books available and there corresponding authors.
+
+```
+Enter your choice: 5
+
+Book ISBN               Book Title          Category    No of Books     Author name         Author mail
+978-3-16-148410-0       The Notebook        Romance     4               Nicholas Sparks     nicholassparks@gmail.com
+978-3-17-148410-0       Da Vinci Code       Mystery     5               Dan Brown           danbrown@gmail.com
+```
+
+6. **Issue book to student**: This action is responsible for creating a student and issuing him/her the specified book. The date issued represent the current date and the return date should be after 7 days.
+
+```
+Enter your choice: 6
+Enter usn : 09003688800
+Enter name : John Doe
+Enter book ISBN : 978-3-17-148410-0
+
+Book issued. Return date : Mon Aug 01 19:45:40 EEST 2022
+```
+
+7. **List books by usn**: This action is responsible for listing all books rented by the specified student.
+
+```
+Enter your choice: 7
+Enter usn : 09003688800
+
+Book Title          Student Name    Return date
+Da Vinci Code       John Doe        2022-08-01 16:45:40.636000
+```
+
+## Requirements
+
+For this project, you must accomplish all of the following:
+
+1.  Navigate through a text-based menu using Standard Input and Output.
+2.  Create unit tests for every method other than basic getters, setters and constructors (getters and setters with logic do require unit tests).
+3.  Handle all exceptions gracefully (incorrect input should not crash the program).
+4.  All data should be stored in a normalized SQL database.
+
+### Bonus
+
+1. Add more options that can help display more information such as **List books to be returned today**, etc.
+
+## Important Notes
+
+- Everyone in the squad should contribute equally to the project in time and lines of code written.
+- All code must be reviewed before it is merged into the `master` branch.
+- All squad members must participate in code review.
+- Every repository should have a README file with clear instructions, demo files, or any documentation needed so other teams don't have problems with the review.
+- This is intended to be a challenging assignment. You will have to rely heavily on your teammates and independent research. Learning independently is a hallmark of a good developer and our job is to turn you into good developers. This process may be frustrating but you will learn a ton!
diff --git a/README.md b/README.md
index df676c12..6dba3d52 100644
--- a/README.md
+++ b/README.md
@@ -1,101 +1,61 @@
-![logo_ironhack_blue 7](https://user-images.githubusercontent.com/23629340/40541063-a07a0a8a-601a-11e8-91b5-2f13e4e6b441.png)
+# IronLibrary
 
-# HW | Java IronLibrary (Unit 3 homework)
+## Introducción
 
-## Introduction
+Este proyecto consiste en un sistema de gestión de biblioteca que permite administrar y obtener datos sobre los libros utilizados por los estudiantes. A continuación, se detallan las instrucciones para ejecutar y probar la aplicación.
 
-For this homework, you will be building a Library Management System, that will help managing and acquiring data about the books that are being used by students.
+---
 
-## Instructions
+## Requisitos previos
 
-Let's walk through the details of the homework:
+1. **Java**: Java 21.
+2. **Maven**: correctamente configurado.
+3. **Base de datos**:  MySQL o MariaDB (ajustando las credenciales en el archivo `application.properties`).
 
-### Classes
+---
 
-Four main classes are necessary to complete this homework.
+## Instalación
 
-These classes will be called **Author**, **Book**, **Student** and **Issue**.
+1. Clona el repositorio:
+   ```bash
+   git clone https://github.com/VAlexS/homework-java-ironlibrary
+   cd homework-java-ironlibrary
+   ```
 
-<br>
+2. Compila el proyecto:
+   ```bash
+   mvn clean install
+   ```
 
-**Book class**
+3. Ejecuta la aplicación:
+   ```bash
+   mvn spring-boot:run
+   ```
 
-This class will have:
+---
 
-- Variable called `isbn` of data type `string`, representing the **International Standard Book Number** and acting as the unique identifier for the table book (Private member)
-- Variable called `title` of data type `string` (Private member)
-- Variable called `category` of data type `string` (Private member)
-- Variable called `quantity` of data type `integer` (Private member)
-- A parameterized constructor that takes `isbn`, `title`, `category` and a `quantity`
-- Public Getter functions to access these variables
-- Public Setter functions to change these variables
-- Optional attributes are accepted if needed based on the code structure
+## Uso
 
-<br>
+Al iniciar la aplicación, se mostrará un menú interactivo en la consola. A continuación, se presentan capturas de pantalla y ejemplos de uso.
 
-**Author class**
+### Menú principal
 
-This class will have:
-
-- Variable called `authorId` of data type `integer`, auto-incremented (Private member)
-- Variable called `name` of data type `string` (Private member)
-- Variable called `email` of data type `string` (Private member)
-- Variable called `authorBook` of data type `Book`, representing a One-to-One relationship with `Book` (Private member)
-- A parameterized constructor that takes `name`, `email` and `authorBook`
-- Public Getter functions to access these variables
-- Public Setter functions to change these variables
-- Optional attributes are accepted if needed based on the code structure
-
-<br>
-
-**Issue class**
-
-This class will have:
-
-- Variable called `issueId` of data type `integer`, auto-incremented (Private member)
-- Variable called `issueDate` of data type `string` (Private member)
-- Variable called `returnDate` of data type `string` (Private member)
-- Variable called `issueStudent` of data type `Student`, representing a One-to-One relationship with `Student`(Private member)
-- Variable called `issueBook` of data type `Book`, representing a One-to-One relationship with `Book` (Private member)
-- A parameterized constructor that takes `issueDate`, `returnDate`, `issueStudent` and `issueBook`
-- Public Getter functions to access these variables
-- Public Setter functions to change these variables
-- Optional attributes are accepted if needed based on the code structure
-
-<br>
-
-**Student class**
-
-This class will have:
-
-- Variable called `usn` of data type `string`, representing the **Universal Student Number** and acting as the unique identifier for the table student (Private member)
-- Variable called `name` of data type `string` (Private member)
-- A parameterized constructor that takes `usn` and `name`
-- Public Getter functions to access these variables
-- Public Setter functions to change these variables
-- Optional attributes are accepted if needed based on the code structure
-
-## How the application works
-
-After starting this application, a list of options will pop up for the user. The user will be asked to input a number based on the list of options displayed, such as adding a book, searching for a book, issuing a book for a student, etc.
-After a certain action is executed, the menu is re-displayed for the user automatically.
-
-The menu should have the following options:
-
-1. Add a book
-2. Search book by title
-3. Search book by category
-4. Search book by Author
-5. List all books along with author
-6. Issue book to student
-7. List books by usn
-8. Exit
-
-## Actions
+```plaintext
+=========== 📖 Iron Library ===========
+1. 📕 Add a book
+2. 🔎 Search book by title
+3. 🗂️ Search book by category
+4. 🖋️ Search book by author
+5. 📚 List all books along with author
+6. 🎓 Issue book to student
+7. 🆔 List books by USN
+8. 🚪 Exit
+Choose an option:
+```
 
-1. **Add a book**: This action is responsible of adding a book and its author in the system. The user will be prompted to enter the details of both the book and the author in the following format:
+### Ejemplo: Agregar un libro
 
-```
+```plaintext
 Enter your choice: 1
 Enter isbn : 978-3-16-148410-0
 Enter title : The Notebook
@@ -103,11 +63,12 @@ Enter category : Romance
 Enter Author name : Nicholas Sparks
 Enter Author mail : nicholassparks@gmail.com
 Enter number of books : 4
+Record created successfully!
 ```
 
-2. **Search book by title**: This action is responsible for searching a book by title.
+### Ejemplo: Buscar un libro por título
 
-```
+```plaintext
 Enter your choice: 2
 Enter title : The Notebook
 
@@ -115,74 +76,25 @@ Book ISBN               Book Title          Category    No of Books
 978-3-16-148410-0       The Notebook        Romance     4
 ```
 
-3. **Search book by category**: This action is responsible for searching a book by category.
-
-```
-Enter your choice: 3
-Enter category : Romance
-
-Book ISBN               Book Title          Category    No of Books
-978-3-16-148410-0       The Notebook        Romance     4
-```
-
-4. **Search book by author**: This action is responsible for searching a book by author name.
-
-```
-Enter your choice: 4
-Enter name : Nicholas Sparks
-
-Book ISBN               Book Title          Category    No of Books
-978-3-16-148410-0       The Notebook        Romance     4
-```
-
-5. **List all books along with author**: This action is responsible for listing all the books available and there corresponding authors.
+### Ejemplo: Emitir un libro a un estudiante
 
-```
-Enter your choice: 5
-
-Book ISBN               Book Title          Category    No of Books     Author name         Author mail
-978-3-16-148410-0       The Notebook        Romance     4               Nicholas Sparks     nicholassparks@gmail.com
-978-3-17-148410-0       Da Vinci Code       Mystery     5               Dan Brown           danbrown@gmail.com
-```
-
-6. **Issue book to student**: This action is responsible for creating a student and issuing him/her the specified book. The date issued represent the current date and the return date should be after 7 days.
-
-```
+```plaintext
 Enter your choice: 6
 Enter usn : 09003688800
 Enter name : John Doe
 Enter book ISBN : 978-3-17-148410-0
 
-Book issued. Return date : Mon Aug 01 19:45:40 EEST 2022
+Book issued. Return date : 2023-10-15
 ```
 
-7. **List books by usn**: This action is responsible for listing all books rented by the specified student.
+---
 
-```
-Enter your choice: 7
-Enter usn : 09003688800
+## Pruebas
 
-Book Title          Student Name    Return date
-Da Vinci Code       John Doe        2022-08-01 16:45:40.636000
-```
+El proyecto incluye pruebas unitarias para todos los servicios principales. Para ejecutarlas, utiliza el siguiente comando:
 
-## Requirements
-
-For this project, you must accomplish all of the following:
-
-1.  Navigate through a text-based menu using Standard Input and Output.
-2.  Create unit tests for every method other than basic getters, setters and constructors (getters and setters with logic do require unit tests).
-3.  Handle all exceptions gracefully (incorrect input should not crash the program).
-4.  All data should be stored in a normalized SQL database.
-
-### Bonus
-
-1. Add more options that can help display more information such as **List books to be returned today**, etc.
+```bash
+mvn test
+```
 
-## Important Notes
 
-- Everyone in the squad should contribute equally to the project in time and lines of code written.
-- All code must be reviewed before it is merged into the `master` branch.
-- All squad members must participate in code review.
-- Every repository should have a README file with clear instructions, demo files, or any documentation needed so other teams don't have problems with the review.
-- This is intended to be a challenging assignment. You will have to rely heavily on your teammates and independent research. Learning independently is a hallmark of a good developer and our job is to turn you into good developers. This process may be frustrating but you will learn a ton!
diff --git a/pom.xml b/pom.xml
index d184802e..4e3c38af 100644
--- a/pom.xml
+++ b/pom.xml
@@ -54,7 +54,24 @@
 			<artifactId>mariadb-java-client</artifactId>
 			<version>3.3.1</version>
 		</dependency>
-
+		<dependency>
+			<groupId>org.junit.jupiter</groupId>
+			<artifactId>junit-jupiter</artifactId>
+			<version>5.11.4</version>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.junit.platform</groupId>
+			<artifactId>junit-platform-launcher</artifactId>
+			<version>1.11.4</version>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.mockito</groupId>
+			<artifactId>mockito-junit-jupiter</artifactId>
+			<version>5.5.0</version>
+			<scope>test</scope>
+		</dependency>
 	</dependencies>
 
 	<build>
diff --git a/src/main/java/com/example/homework_library/HomeworkLibraryApplication.java b/src/main/java/com/example/homework_library/HomeworkLibraryApplication.java
index c4f92554..4efb79fb 100644
--- a/src/main/java/com/example/homework_library/HomeworkLibraryApplication.java
+++ b/src/main/java/com/example/homework_library/HomeworkLibraryApplication.java
@@ -1,14 +1,14 @@
 package com.example.homework_library;
 
-import com.example.homework_library.models.*;
-import com.example.homework_library.repositories.*;
+import com.example.homework_library.models.Book;
+import com.example.homework_library.models.Issue;
+import com.example.homework_library.services.BookService;
+import com.example.homework_library.services.IssueService;
+import com.example.homework_library.services.StudentService;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
-import org.springframework.context.ConfigurableApplicationContext;
 
-import java.time.LocalDate;
-import java.time.format.DateTimeFormatter;
 import java.util.List;
 import java.util.NoSuchElementException;
 import java.util.Scanner;
@@ -17,79 +17,84 @@
 public class HomeworkLibraryApplication {
 
     @Autowired
-    private BookRepository bookRepository;
+    private BookService bookService;
 
     @Autowired
-    private AuthorRepository authorRepository;
+    private StudentService studentService;
 
     @Autowired
-    private StudentRepository studentRepository;
-
-    @Autowired
-    private IssuesRepository issuesRepository;
+    private IssueService issueService;
 
     public static final String RESET = "\u001B[0m";
     public static final String GREEN = "\u001B[32m";
     public static final String CYAN = "\u001B[36m";
-    public static final String YELLOW = "\u001B[33m";
     public static final String RED = "\u001B[31m";
 
     private final Scanner scanner = new Scanner(System.in);
 
-    public void addBook() {
-        System.out.print("Enter the isbn: ");
-        String isbn = scanner.nextLine().trim();
-        if (isbn.isEmpty()) {
-            throw new IllegalArgumentException("ISBN cannot be empty.");
-        }
-
-        System.out.print("Enter the title of the book: ");
-        String title = scanner.nextLine().trim();
-        if (title.isEmpty()) {
-            throw new IllegalArgumentException("Book title cannot be empty.");
-        }
+    public static void main(String[] args) {
+        SpringApplication.run(HomeworkLibraryApplication.class, args).getBean(HomeworkLibraryApplication.class).runMenu();
+    }
 
-        System.out.print("Enter the category of the book: ");
-        String category = scanner.nextLine().trim();
-        if (category.isEmpty()) {
-            throw new IllegalArgumentException("Book category cannot be empty.");
-        }
+    public void runMenu() {
+        boolean running = true;
 
-        System.out.print("Enter the author of the book: ");
-        String authorName = scanner.nextLine().trim();
-        if (authorName.isEmpty()) {
-            throw new IllegalArgumentException("Author cannot be empty.");
-        }
+        while (running) {
+            try {
+                menuDisplay();
+                String option = scanner.nextLine().trim();
 
-        System.out.print("Enter the mail of the author: ");
-        String mail = scanner.nextLine().trim();
-        if (mail.isEmpty()) {
-            throw new IllegalArgumentException("Author mail cannot be empty.");
+                switch (option) {
+                    case "1" -> addBook();
+                    case "2" -> searchBook();
+                    case "3" -> searchBookByCategory();
+                    case "4" -> findBookByAuthor();
+                    case "5" -> listAllBooks();
+                    case "6" -> issueBook();
+                    case "7" -> listAllBooksByUSN();
+                    case "8", "exit" -> running = false;
+                    default -> System.out.println("Invalid option. Please try again.");
+                }
+            } catch (IllegalArgumentException e) {
+                System.out.println("Incorrect argument: " + e.getMessage());
+            } catch (NoSuchElementException e) {
+                System.out.println("Element not found: " + e.getMessage());
+            } catch (Exception e) {
+                System.out.println("An unexpected error occurred: " + e.getMessage());
+            }
         }
 
-        System.out.print("Enter the number of books: ");
-        int booksNumber = Integer.parseInt(scanner.nextLine().trim());
-        if (booksNumber <= 0) {
-            throw new IllegalArgumentException("Book number cannot be 0 or less.");
-        }
+        scanner.close();
+    }
 
-        Book book = new Book(isbn, title, category, booksNumber);
-        Author author = new Author(authorName, mail, book);
+    private void menuDisplay() {
+        System.out.println(GREEN + "\n=========== 📖 Iron Library ===========" + RESET);
+        System.out.println(CYAN + "1. 📕 Add a book" + RESET);
+        System.out.println(CYAN + "2. 🔎 Search book by title" + RESET);
+        System.out.println(CYAN + "3. 🗂️ Search book by category" + RESET);
+        System.out.println(CYAN + "4. 🖋️ Search book by author" + RESET);
+        System.out.println(CYAN + "5. 📚 List all books along with author" + RESET);
+        System.out.println(CYAN + "6. 🎓 Issue book to student" + RESET);
+        System.out.println(CYAN + "7. 🆔 List books by USN" + RESET);
+        System.out.println(RED + "8. 🚪 Exit" + RESET);
+        System.out.print("Choose an option: ");
+    }
 
-        bookRepository.save(book);
-        authorRepository.save(author);
+    private void addBook() {
+        String isbn = prompt("Enter the ISBN: ");
+        String title = prompt("Enter the title of the book: ");
+        String category = prompt("Enter the category of the book: ");
+        String authorName = prompt("Enter the author of the book: ");
+        String mail = prompt("Enter the mail of the author: ");
+        int booksNumber = Integer.parseInt(prompt("Enter the number of books: "));
 
+        bookService.addBook(isbn, title, category, authorName, mail, booksNumber);
         System.out.println("Record created successfully!");
     }
 
-    public void searchBook() {
-        System.out.print("Enter the title of the book: ");
-        String title = scanner.nextLine().trim();
-        if (title.isEmpty()) {
-            throw new IllegalArgumentException("Book title cannot be empty.");
-        }
-
-        Book book = bookRepository.findByTitle(title);
+    private void searchBook() {
+        String title = prompt("Enter the title of the book: ");
+        Book book = bookService.searchBookByTitle(title);
         if (book != null) {
             System.out.println("Book found: " + book);
         } else {
@@ -97,200 +102,70 @@ public void searchBook() {
         }
     }
 
-    public void issueBook() {
-        System.out.print("Enter usn: ");
-        String usn = scanner.nextLine().trim();
-        if (usn.isEmpty() || findIssueWithUSN(usn) != null) {
-            throw new IllegalArgumentException("usn cannot be empty.");
-        }
-
-        Student student = studentRepository.findStudentByUsn(usn);
-
-
-        System.out.print("Enter ISBN: ");
-        String isbn = scanner.nextLine().trim();
-        if (isbn.isEmpty() || findIssueWithISBN(isbn) != null) {
-            throw new IllegalArgumentException("isbn cannot be empty.");
-        }
-
-        Book book = bookRepository.findByIsbn(isbn);
-
-        issuesRepository.save(new Issue(getDate(), getExpiredDate(), student, book));
-        System.out.println("Book issued. Return date: " + getExpiredDate());
-    }
-
-    public Student findIssueWithUSN(String usn) {
-        if (usn.isEmpty()) {
-            throw new IllegalArgumentException("usn cannot be empty.");
+    private void searchBookByCategory() {
+        String category = prompt("Enter the category of the book: ");
+        List<Book> books = bookService.searchBooksByCategory(category);
+        if (!books.isEmpty()) {
+            System.out.println("Books found in category " + category + ":");
+            books.forEach(System.out::println);
+        } else {
+            System.out.println("Book category not found.");
         }
-        return issuesRepository.findIssuesByIssueStudent_Usn(usn).getIssueStudent();
-
     }
 
-
-    public Book findIssueWithISBN(String isbn) {
-        if (isbn.isEmpty()) {
-            throw new IllegalArgumentException("isbn cannot be empty.");
+    private void findBookByAuthor() {
+        String authorName = prompt("Enter the author of the book: ");
+        Book book = bookService.findBookByAuthor(authorName);
+        if (book != null) {
+            System.out.println("Book found: " + book);
+        } else {
+            System.out.println("Book not found.");
         }
-        return issuesRepository.findIssuesByIssueBook_Isbn(isbn).getIssueBook();
-
-    }
-
-    public String getDate() {
-        LocalDate actualDate = LocalDate.now();
-        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
-        return actualDate.format(formatter);
     }
 
-    public String getExpiredDate() {
-        LocalDate actualDate = LocalDate.now();
-        LocalDate datePlusWeek = actualDate.plusWeeks(1);
-        return datePlusWeek.toString();
-    }
-
-
-    public void listAllBooks() {
+    private void listAllBooks() {
+        List<Book> books = bookService.listAllBooks();
 
+        String separator = String.format("%-90s", "").replace(' ', '=');
 
-        List<Book> allBooks = bookRepository.findAllBooksAndAuthors(); // Devuelve una lista de objetos Book
-
-        System.out.println("===========================================================");
+        System.out.println(separator);
         System.out.printf("%-25s %-30s %-20s %-10s%n",
                 "Book ISBN", "Book Title", "Category", "Quantity");
-        System.out.println("===========================================================");
+        System.out.println(separator);
 
-        for (Book book : allBooks) {
+        for (Book book : books) {
             System.out.printf("%-25s %-30s %-20s %-10d%n",
                     book.getIsbn(), book.getTitle(), book.getCategory(), book.getQuantity());
         }
 
-        System.out.println("===========================================================");
-
-
-    }
-
-    public void listAllBooksByUSN() {
-        System.out.print("Enter usn: ");
-        String usn = scanner.nextLine().trim();
-        Issue issue = issuesRepository.findIssuesByIssueStudent_Usn(usn);
-        if (issue != null) {
-            System.out.println("Book found: " + issue.getIssueBook());
-        } else {
-            System.out.println("Book not found.");
-        }
-    }
-
-    public void findBookByAuthor() {
-        System.out.print("Enter the author of the book: ");
-        String authorName = scanner.nextLine().trim();
-        if (authorName.isEmpty()) {
-            throw new IllegalArgumentException("Author cannot be empty.");
-        }
-
-        Book book = authorRepository.findByName(authorName).getAuthorBook();
-        if (book != null) {
-            System.out.println("Book found: " + book);
-        } else {
-            System.out.println("Book not found.");
-        }
-
-    }
-
-    public void menuDisplay() {
-        System.out.println(GREEN + "\n======== 📖 Iron Library ========" + RESET);
-        System.out.println(CYAN + "1. 📕 Add a book" + RESET);
-        System.out.println(CYAN + "2. 🔎 Search book by title" + RESET);
-        System.out.println(CYAN + "3. 🗂️ Search book by category" + RESET);
-        System.out.println(CYAN + "4. 🖋️ Search book by author" + RESET);
-        System.out.println(CYAN + "5. 📚 List all books along with author" + RESET);
-        System.out.println(CYAN + "6. 🎓 Issue book to student" + RESET);
-        System.out.println(CYAN + "7. 🆔 List books by USN" + RESET);
-        System.out.println(GREEN + "---------------------------------" + RESET);
-        System.out.println(RED + "8. 🚪 Exit" + RESET);
-        System.out.println(GREEN + "=================================" + RESET);
-        System.out.print("Choose an option: ");
+        System.out.println(separator);
     }
 
-    public void runMenu() {
-        boolean running = true;
 
-        while (running) {
-            try {
-                menuDisplay();
-                String option = scanner.nextLine();
+    private void issueBook() {
+        String usn = prompt("Enter USN: ");
+        String isbn = prompt("Enter ISBN: ");
 
-                switch (option) {
-                    case "1":
-                        addBook();
-                        break;
-                    case "2":
-                        searchBook();
-                        break;
-                    case "3":
-                        searchBookByCategory();
-                        break;
-                    case "4":
-                        findBookByAuthor();
-                        break;
-                    case "5":
-                        listAllBooks();
-                        break;
-                    case "6":
-                        issueBook();
-                        break;
-                    case "7":
-                        listAllBooksByUSN();
-                        break;
-                    case "8", "exit":
-                        running = false;
-                        break;
-                    default:
-                        System.out.println("Invalid option. Please try again.");
-                }
-            } catch (IllegalArgumentException e) {
-                System.out.println("Incorrect argument: " + e.getMessage());
-            } catch (NoSuchElementException e) {
-                System.out.println("Element not found: " + e.getMessage());
-            } catch (Exception e) {
-                System.out.println("An unexpected error occurred: " + e.getMessage());
-            }
+        try {
+            issueService.issueBook(usn, isbn);
+            System.out.println("Book issued successfully!");
+        } catch (IllegalArgumentException | IllegalStateException e) {
+            System.out.println("Error: " + e.getMessage());
         }
-
-        scanner.close();
     }
 
-    public void searchBookByCategory() {
-        List<Book> books;
-        System.out.print("Enter the category of the book: ");
-        String category = scanner.nextLine().trim();
-        if (category.isEmpty()) {
-            throw new IllegalArgumentException("Book category cannot be empty.");
-        }
-
-        books = bookRepository.findByCategory(category);
-        if (!books.isEmpty()) {
-            System.out.println("Books found in category " + category + ":");
-            for (Book book : books) {
-                System.out.println(book);
-            }
+    private void listAllBooksByUSN() {
+        String usn = prompt("Enter USN: ");
+        Issue issue = issueService.findIssueByStudentUsn(usn);
+        if (issue != null) {
+            System.out.println("Book found: " + issue.getIssueBook());
         } else {
-            System.out.println("Book category not found.");
+            System.out.println("No books found for this USN.");
         }
     }
 
-
-    public static void main(String[] args) {
-
-        // Run the Spring Boot application
-        ConfigurableApplicationContext context = SpringApplication.run(HomeworkLibraryApplication.class, args);
-
-        // Get the IronlibraryApplication bean from the context
-        HomeworkLibraryApplication app = context.getBean(HomeworkLibraryApplication.class);
-
-        app.runMenu();
-
-        // Close the application context
-        SpringApplication.exit(context);
+    private String prompt(String message) {
+        System.out.print(message);
+        return scanner.nextLine().trim();
     }
-
 }
diff --git a/src/main/java/com/example/homework_library/repositories/IssuesRepository.java b/src/main/java/com/example/homework_library/repositories/IssuesRepository.java
index ca64efbe..eb321d3c 100644
--- a/src/main/java/com/example/homework_library/repositories/IssuesRepository.java
+++ b/src/main/java/com/example/homework_library/repositories/IssuesRepository.java
@@ -13,5 +13,7 @@ public interface IssuesRepository extends JpaRepository<Issue, Integer> {
     //List<Issue> findIssuesByIssueStudent_Usn(String issueStudentUsn);
     Issue findIssuesByIssueStudent_Usn(String issueStudentUsn);
     Issue findIssuesByIssueBook_Isbn(String issueBookIsbn);
+    boolean existsByIssueStudent_Usn(String usn);
+    boolean existsByIssueBook_Isbn(String isbn);
 
 }
diff --git a/src/main/java/com/example/homework_library/services/AuthorService.java b/src/main/java/com/example/homework_library/services/AuthorService.java
new file mode 100644
index 00000000..e95b81ba
--- /dev/null
+++ b/src/main/java/com/example/homework_library/services/AuthorService.java
@@ -0,0 +1,25 @@
+package com.example.homework_library.services;
+
+import com.example.homework_library.models.Author;
+import com.example.homework_library.models.Book;
+import com.example.homework_library.repositories.AuthorRepository;
+import org.springframework.stereotype.Service;
+
+@Service
+public class AuthorService {
+
+    private final AuthorRepository authorRepository;
+
+    public AuthorService(AuthorRepository authorRepository) {
+        this.authorRepository = authorRepository;
+    }
+
+    public Author addAuthor(String name, String email, Book book) {
+        Author author = new Author(name, email, book);
+        return authorRepository.save(author);
+    }
+
+    public Author findAuthorByName(String name) {
+        return authorRepository.findByName(name);
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/example/homework_library/services/BookService.java b/src/main/java/com/example/homework_library/services/BookService.java
new file mode 100644
index 00000000..b24beccb
--- /dev/null
+++ b/src/main/java/com/example/homework_library/services/BookService.java
@@ -0,0 +1,53 @@
+package com.example.homework_library.services;
+
+import com.example.homework_library.models.Author;
+import com.example.homework_library.models.Book;
+import com.example.homework_library.repositories.AuthorRepository;
+import com.example.homework_library.repositories.BookRepository;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+public class BookService {
+
+    private final BookRepository bookRepository;
+    private final AuthorRepository authorRepository;
+
+    public BookService(BookRepository bookRepository, AuthorRepository authorRepository) {
+        this.bookRepository = bookRepository;
+        this.authorRepository = authorRepository;
+    }
+
+    public void addBook(String isbn, String title, String category, String authorName, String mail, int booksNumber) {
+        Book book = new Book(isbn, title, category, booksNumber);
+        Author author = new Author(authorName, mail, book);
+
+        bookRepository.save(book);
+        authorRepository.save(author);
+    }
+
+    public Book searchBookByTitle(String title) {
+        return bookRepository.findByTitle(title);
+    }
+
+    public List<Book> listAllBooks() {
+        return bookRepository.findAllBooksAndAuthors();
+    }
+
+    public List<Book> searchBooksByCategory(String category) {
+        return bookRepository.findByCategory(category);
+    }
+
+    public Book findBookByAuthor(String authorName) {
+        Author author = authorRepository.findByName(authorName);
+        if (author != null) {
+            return author.getAuthorBook();
+        }
+        return null;
+    }
+
+    public Book searchBookByIsbn(String isbn) {
+        return bookRepository.findByIsbn(isbn);
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/example/homework_library/services/IssueService.java b/src/main/java/com/example/homework_library/services/IssueService.java
new file mode 100644
index 00000000..a434761c
--- /dev/null
+++ b/src/main/java/com/example/homework_library/services/IssueService.java
@@ -0,0 +1,70 @@
+package com.example.homework_library.services;
+
+import com.example.homework_library.models.Book;
+import com.example.homework_library.models.Issue;
+import com.example.homework_library.models.Student;
+import com.example.homework_library.repositories.BookRepository;
+import com.example.homework_library.repositories.IssuesRepository;
+import com.example.homework_library.repositories.StudentRepository;
+import org.springframework.stereotype.Service;
+
+import java.time.LocalDate;
+import java.time.format.DateTimeFormatter;
+
+@Service
+public class IssueService {
+
+    private final IssuesRepository issuesRepository;
+    private final StudentRepository studentRepository;
+    private final BookRepository bookRepository;
+
+    public IssueService(IssuesRepository issuesRepository,StudentRepository studentRepository, BookRepository bookRepository) {
+        this.issuesRepository = issuesRepository;
+        this.studentRepository = studentRepository;
+        this.bookRepository = bookRepository;
+    }
+
+    public void issueBook(String usn, String isbn) {
+        // Buscar el estudiante por USN
+        Student student = studentRepository.findStudentByUsn(usn);
+        if (student == null) {
+            throw new IllegalArgumentException("Student not found with USN: " + usn);
+        }
+
+        // Buscar el libro por ISBN
+        Book book = bookRepository.findByIsbn(isbn);
+        if (book == null) {
+            throw new IllegalArgumentException("Book not found with ISBN: " + isbn);
+        }
+
+        // Validar si ya existe un préstamo asociado al estudiante o al libro
+        if (issuesRepository.existsByIssueStudent_Usn(usn)) {
+            throw new IllegalStateException("There is already an issue associated with this USN.");
+        }
+
+        if (issuesRepository.existsByIssueBook_Isbn(isbn)) {
+            throw new IllegalStateException("There is already an issue associated with this ISBN.");
+        }
+
+        // Crear y guardar el préstamo
+        Issue issue = new Issue(getDate(), getExpiredDate(), student, book);
+        issuesRepository.save(issue);
+    }
+
+
+    public Issue findIssueByStudentUsn(String usn) {
+        return issuesRepository.findIssuesByIssueStudent_Usn(usn);
+    }
+
+    private String getDate() {
+        LocalDate actualDate = LocalDate.now();
+        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
+        return actualDate.format(formatter);
+    }
+
+    private String getExpiredDate() {
+        LocalDate actualDate = LocalDate.now();
+        LocalDate datePlusWeek = actualDate.plusWeeks(1);
+        return datePlusWeek.toString();
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/example/homework_library/services/StudentService.java b/src/main/java/com/example/homework_library/services/StudentService.java
new file mode 100644
index 00000000..a0a0e22a
--- /dev/null
+++ b/src/main/java/com/example/homework_library/services/StudentService.java
@@ -0,0 +1,25 @@
+package com.example.homework_library.services;
+
+import com.example.homework_library.models.Student;
+import com.example.homework_library.repositories.StudentRepository;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+public class StudentService {
+
+    private final StudentRepository studentRepository;
+
+    public StudentService(StudentRepository studentRepository) {
+        this.studentRepository = studentRepository;
+    }
+
+    public Student findStudentByUsn(String usn) {
+        return studentRepository.findStudentByUsn(usn);
+    }
+
+    public List<Student> listAllStudents() {
+        return studentRepository.findAll();
+    }
+}
\ No newline at end of file
diff --git a/src/test/java/com/example/homework_library/HomeworkLibraryApplicationTests.java b/src/test/java/com/example/homework_library/HomeworkLibraryApplicationTests.java
deleted file mode 100644
index e889a16b..00000000
--- a/src/test/java/com/example/homework_library/HomeworkLibraryApplicationTests.java
+++ /dev/null
@@ -1,13 +0,0 @@
-package com.example.homework_library;
-
-import org.junit.jupiter.api.Test;
-import org.springframework.boot.test.context.SpringBootTest;
-
-@SpringBootTest
-class HomeworkLibraryApplicationTests {
-
-	@Test
-	void contextLoads() {
-	}
-
-}
diff --git a/src/test/java/com/example/homework_library/models/BookTest.java b/src/test/java/com/example/homework_library/models/BookTest.java
deleted file mode 100644
index 55bfb5ea..00000000
--- a/src/test/java/com/example/homework_library/models/BookTest.java
+++ /dev/null
@@ -1,36 +0,0 @@
-package com.example.homework_library.models;
-
-import com.example.homework_library.repositories.BookRepository;
-import org.junit.jupiter.api.DisplayName;
-import org.junit.jupiter.api.Test;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.boot.test.context.SpringBootTest;
-
-import java.util.List;
-
-@SpringBootTest
-class BookTest {
-
-    @Autowired
-    BookRepository bookRepository;
-
-    @Test
-    @DisplayName("Save book")
-    void saveBook(){
-        Book book = new Book("32fs4r", "El señor de los anillos", "accion", 42);
-        bookRepository.save(book);
-
-    }
-
-    @Test
-    @DisplayName("Buscar todos los libros")
-    void listAllBooks(){
-        List<Book> allBooks = bookRepository.findAllBooksAndAuthors();
-
-        System.out.println("============================");
-        System.out.println("Los libros que hemos encontrado son: ");
-        System.out.println(allBooks);
-        System.out.println("===================");
-    }
-
-}
\ No newline at end of file
diff --git a/src/test/java/com/example/homework_library/models/StudentTest.java b/src/test/java/com/example/homework_library/models/StudentTest.java
deleted file mode 100644
index f8aeeb7b..00000000
--- a/src/test/java/com/example/homework_library/models/StudentTest.java
+++ /dev/null
@@ -1,36 +0,0 @@
-package com.example.homework_library.models;
-
-import com.example.homework_library.repositories.StudentRepository;
-import jakarta.transaction.Transactional;
-import org.junit.jupiter.api.DisplayName;
-import org.junit.jupiter.api.Test;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.boot.test.context.SpringBootTest;
-import org.springframework.test.annotation.Rollback;
-
-@SpringBootTest
-class StudentTest {
-
-    @Autowired
-    StudentRepository studentRepository;
-
-    @Test
-    @DisplayName("Guardo un estudiante en la base de datos")
-    @Transactional
-    @Rollback(false)
-    void saveStudent(){
-        Student student = new Student("123a", "Daniel");
-
-        studentRepository.save(student);
-    }
-
-    @Test
-    @DisplayName("Listar todos los estudiantes")
-    void findAll(){
-        System.out.println("============================");
-        System.out.println("Los estudiantes que hemos encontrado son: ");
-        System.out.println(studentRepository.findAll());
-        System.out.println("===================");
-    }
-
-}
\ No newline at end of file
diff --git a/src/test/java/com/example/homework_library/services/BookServiceTest.java b/src/test/java/com/example/homework_library/services/BookServiceTest.java
new file mode 100644
index 00000000..eff308f8
--- /dev/null
+++ b/src/test/java/com/example/homework_library/services/BookServiceTest.java
@@ -0,0 +1,99 @@
+package com.example.homework_library.services;
+
+import com.example.homework_library.models.Author;
+import com.example.homework_library.models.Book;
+import com.example.homework_library.repositories.AuthorRepository;
+import com.example.homework_library.repositories.BookRepository;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.ArgumentCaptor;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.*;
+
+class BookServiceTest {
+
+    @Mock
+    private BookRepository bookRepository;
+
+    @Mock
+    private AuthorRepository authorRepository;
+
+    @InjectMocks
+    private BookService bookService;
+
+    @BeforeEach
+    void setUp() {
+        MockitoAnnotations.openMocks(this);
+    }
+
+    @Test
+    void testAddBook() {
+        // Arrange
+        String isbn = "123";
+        String title = "Test Book";
+        String category = "Fiction";
+        String authorName = "John Doe";
+        String mail = "john@example.com";
+        int booksNumber = 10;
+
+        // Act
+        bookService.addBook(isbn, title, category, authorName, mail, booksNumber);
+
+        // Assert
+        ArgumentCaptor<Book> bookCaptor = ArgumentCaptor.forClass(Book.class);
+        ArgumentCaptor<Author> authorCaptor = ArgumentCaptor.forClass(Author.class);
+
+        verify(bookRepository, times(1)).save(bookCaptor.capture());
+        verify(authorRepository, times(1)).save(authorCaptor.capture());
+
+        Book capturedBook = bookCaptor.getValue();
+        Author capturedAuthor = authorCaptor.getValue();
+
+        assertEquals(isbn, capturedBook.getIsbn());
+        assertEquals(title, capturedBook.getTitle());
+        assertEquals(category, capturedBook.getCategory());
+        assertEquals(booksNumber, capturedBook.getQuantity());
+
+        assertEquals(authorName, capturedAuthor.getName());
+        assertEquals(mail, capturedAuthor.getEmail());
+        assertEquals(capturedBook, capturedAuthor.getAuthorBook());
+    }
+
+    @Test
+    void testSearchBookByTitle() {
+        Book book = new Book("123", "Test Book", "Fiction", 10);
+        when(bookRepository.findByTitle("Test Book")).thenReturn(book);
+
+        Book result = bookService.searchBookByTitle("Test Book");
+
+        assertNotNull(result);
+        assertEquals("Test Book", result.getTitle());
+    }
+
+    @Test
+    void testListAllBooks() {
+        when(bookRepository.findAllBooksAndAuthors()).thenReturn(List.of(new Book("123", "Test Book", "Fiction", 10)));
+
+        List<Book> books = bookService.listAllBooks();
+
+        assertFalse(books.isEmpty());
+        assertEquals(1, books.size());
+    }
+
+    @Test
+    void testSearchBookByIsbn() {
+        Book book = new Book("123", "Test Book", "Fiction", 10);
+        when(bookRepository.findByIsbn("123")).thenReturn(book);
+
+        Book result = bookService.searchBookByIsbn("123");
+
+        assertNotNull(result);
+        assertEquals("123", result.getIsbn());
+    }
+}
\ No newline at end of file
diff --git a/src/test/java/com/example/homework_library/services/IssueServiceTest.java b/src/test/java/com/example/homework_library/services/IssueServiceTest.java
new file mode 100644
index 00000000..b126969b
--- /dev/null
+++ b/src/test/java/com/example/homework_library/services/IssueServiceTest.java
@@ -0,0 +1,61 @@
+package com.example.homework_library.services;
+
+import com.example.homework_library.models.Book;
+import com.example.homework_library.models.Issue;
+import com.example.homework_library.models.Student;
+import com.example.homework_library.repositories.BookRepository;
+import com.example.homework_library.repositories.IssuesRepository;
+import com.example.homework_library.repositories.StudentRepository;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.*;
+
+class IssueServiceTest {
+
+    @Mock
+    private IssuesRepository issuesRepository;
+
+    @Mock
+    private StudentRepository studentRepository;
+
+    @Mock
+    private BookRepository bookRepository;
+
+    @InjectMocks
+    private IssueService issueService;
+
+    @BeforeEach
+    void setUp() {
+        MockitoAnnotations.openMocks(this);
+    }
+
+    @Test
+    void testIssueBook() {
+        Student student = new Student("USN123", "John Doe");
+        Book book = new Book("123", "Test Book", "Fiction", 10);
+
+        when(studentRepository.findStudentByUsn("USN123")).thenReturn(student);
+        when(bookRepository.findByIsbn("123")).thenReturn(book);
+        when(issuesRepository.existsByIssueStudent_Usn("USN123")).thenReturn(false);
+        when(issuesRepository.existsByIssueBook_Isbn("123")).thenReturn(false);
+
+        issueService.issueBook("USN123", "123");
+
+        verify(issuesRepository, times(1)).save(any(Issue.class));
+    }
+
+    @Test
+    void testFindIssueByStudentUsn() {
+        Issue issue = new Issue("2023-10-01", "2023-10-08", new Student(), new Book());
+        when(issuesRepository.findIssuesByIssueStudent_Usn("USN123")).thenReturn(issue);
+
+        Issue result = issueService.findIssueByStudentUsn("USN123");
+
+        assertNotNull(result);
+    }
+}
\ No newline at end of file
diff --git a/src/test/java/com/example/homework_library/services/StudentServiceTest.java b/src/test/java/com/example/homework_library/services/StudentServiceTest.java
new file mode 100644
index 00000000..d018dfe8
--- /dev/null
+++ b/src/test/java/com/example/homework_library/services/StudentServiceTest.java
@@ -0,0 +1,49 @@
+package com.example.homework_library.services;
+
+import com.example.homework_library.models.Student;
+import com.example.homework_library.repositories.StudentRepository;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.*;
+
+class StudentServiceTest {
+
+    @Mock
+    private StudentRepository studentRepository;
+
+    @InjectMocks
+    private StudentService studentService;
+
+    @BeforeEach
+    void setUp() {
+        MockitoAnnotations.openMocks(this);
+    }
+
+    @Test
+    void testFindStudentByUsn() {
+        Student student = new Student("USN123", "John Doe");
+        when(studentRepository.findStudentByUsn("USN123")).thenReturn(student);
+
+        Student result = studentService.findStudentByUsn("USN123");
+
+        assertNotNull(result);
+        assertEquals("USN123", result.getUsn());
+    }
+
+    @Test
+    void testListAllStudents() {
+        when(studentRepository.findAll()).thenReturn(List.of(new Student("USN123", "John Doe")));
+
+        List<Student> students = studentService.listAllStudents();
+
+        assertFalse(students.isEmpty());
+        assertEquals(1, students.size());
+    }
+}
\ No newline at end of file

From a28a4d179226186b4d97a99ad1592793577c65e8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Su=C3=A1rez=20Garc=C3=ADa?= <dsuarezg@uoc.edu>
Date: Wed, 30 Apr 2025 14:19:54 +0200
Subject: [PATCH 20/21] Minor Corrections

---
 .../HomeworkLibraryApplication.java           | 64 +++++++++++++++++--
 .../repositories/AuthorRepository.java        |  2 +
 .../services/AuthorService.java               |  6 ++
 3 files changed, 66 insertions(+), 6 deletions(-)

diff --git a/src/main/java/com/example/homework_library/HomeworkLibraryApplication.java b/src/main/java/com/example/homework_library/HomeworkLibraryApplication.java
index 4efb79fb..d7659b88 100644
--- a/src/main/java/com/example/homework_library/HomeworkLibraryApplication.java
+++ b/src/main/java/com/example/homework_library/HomeworkLibraryApplication.java
@@ -1,13 +1,17 @@
 package com.example.homework_library;
 
+import com.example.homework_library.models.Author;
 import com.example.homework_library.models.Book;
 import com.example.homework_library.models.Issue;
+import com.example.homework_library.models.Student;
+import com.example.homework_library.services.AuthorService;
 import com.example.homework_library.services.BookService;
 import com.example.homework_library.services.IssueService;
 import com.example.homework_library.services.StudentService;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.ConfigurableApplicationContext;
 
 import java.util.List;
 import java.util.NoSuchElementException;
@@ -25,6 +29,9 @@ public class HomeworkLibraryApplication {
     @Autowired
     private IssueService issueService;
 
+    @Autowired
+    private AuthorService authorService;
+
     public static final String RESET = "\u001B[0m";
     public static final String GREEN = "\u001B[32m";
     public static final String CYAN = "\u001B[36m";
@@ -32,10 +39,6 @@ public class HomeworkLibraryApplication {
 
     private final Scanner scanner = new Scanner(System.in);
 
-    public static void main(String[] args) {
-        SpringApplication.run(HomeworkLibraryApplication.class, args).getBean(HomeworkLibraryApplication.class).runMenu();
-    }
-
     public void runMenu() {
         boolean running = true;
 
@@ -52,7 +55,9 @@ public void runMenu() {
                     case "5" -> listAllBooks();
                     case "6" -> issueBook();
                     case "7" -> listAllBooksByUSN();
-                    case "8", "exit" -> running = false;
+                    case "8" -> listAllStudents();
+                    case "9" -> listAllAuthors();
+                    case "0", "exit" -> running = false;
                     default -> System.out.println("Invalid option. Please try again.");
                 }
             } catch (IllegalArgumentException e) {
@@ -76,7 +81,11 @@ private void menuDisplay() {
         System.out.println(CYAN + "5. 📚 List all books along with author" + RESET);
         System.out.println(CYAN + "6. 🎓 Issue book to student" + RESET);
         System.out.println(CYAN + "7. 🆔 List books by USN" + RESET);
-        System.out.println(RED + "8. 🚪 Exit" + RESET);
+        System.out.println(CYAN + "8. 👩‍🎓 List all students" + RESET);
+        System.out.println(CYAN + "9. ✍️ List all authors" + RESET);
+        System.out.println(GREEN + "-----------------------------------------" + RESET);
+        System.out.println(RED + "0. 🚪 Exit" + RESET);
+        System.out.println(GREEN + "=========================================" + RESET);
         System.out.print("Choose an option: ");
     }
 
@@ -141,6 +150,38 @@ private void listAllBooks() {
         System.out.println(separator);
     }
 
+    private void listAllStudents() {
+        List<Student> students = studentService.listAllStudents();
+
+        String separator = String.format("%-50s", "").replace(' ', '=');
+
+        System.out.println(separator);
+        System.out.printf("%-20s %-30s%n", "USN", "Student Name");
+        System.out.println(separator);
+
+        for (Student student : students) {
+            System.out.printf("%-20s %-30s%n", student.getUsn(), student.getName());
+        }
+
+        System.out.println(separator);
+    }
+
+    private void listAllAuthors() {
+        List<Author> authors = authorService.findAll();
+
+        String separator = String.format("%-60s", "").replace(' ', '=');
+
+        System.out.println(separator);
+        System.out.printf("%-30s %-30s%n", "Author Name", "Email");
+        System.out.println(separator);
+
+        for (Author author : authors) {
+            System.out.printf("%-30s %-30s%n", author.getName(), author.getEmail());
+        }
+
+        System.out.println(separator);
+    }
+
 
     private void issueBook() {
         String usn = prompt("Enter USN: ");
@@ -168,4 +209,15 @@ private String prompt(String message) {
         System.out.print(message);
         return scanner.nextLine().trim();
     }
+    public static void main(String[] args) {
+        ConfigurableApplicationContext context = SpringApplication.run(HomeworkLibraryApplication.class, args);
+
+        HomeworkLibraryApplication app = context.getBean(HomeworkLibraryApplication.class);
+
+        app.runMenu();
+
+        SpringApplication.exit(context);
+
+    }
+
 }
diff --git a/src/main/java/com/example/homework_library/repositories/AuthorRepository.java b/src/main/java/com/example/homework_library/repositories/AuthorRepository.java
index b94646b3..7891bc73 100644
--- a/src/main/java/com/example/homework_library/repositories/AuthorRepository.java
+++ b/src/main/java/com/example/homework_library/repositories/AuthorRepository.java
@@ -14,6 +14,8 @@ public interface AuthorRepository extends JpaRepository<Author, Integer> {
    // Book findByIsbn(String isbn);
     Author findByName(String authorName);
 
+    List<Author> findAll();
+
 
 
 
diff --git a/src/main/java/com/example/homework_library/services/AuthorService.java b/src/main/java/com/example/homework_library/services/AuthorService.java
index e95b81ba..572bbd4d 100644
--- a/src/main/java/com/example/homework_library/services/AuthorService.java
+++ b/src/main/java/com/example/homework_library/services/AuthorService.java
@@ -5,6 +5,8 @@
 import com.example.homework_library.repositories.AuthorRepository;
 import org.springframework.stereotype.Service;
 
+import java.util.List;
+
 @Service
 public class AuthorService {
 
@@ -19,6 +21,10 @@ public Author addAuthor(String name, String email, Book book) {
         return authorRepository.save(author);
     }
 
+    public List<Author> findAll() {
+        return authorRepository.findAll();
+    }
+
     public Author findAuthorByName(String name) {
         return authorRepository.findByName(name);
     }

From e01d420e6de5dc0cb70918328418d6f0bc9dffc4 Mon Sep 17 00:00:00 2001
From: dsuarezg <45487729+dsuarezg@users.noreply.github.com>
Date: Wed, 30 Apr 2025 14:24:31 +0200
Subject: [PATCH 21/21] Delete src/main/resources directory

---
 src/main/resources/application.properties         | 8 --------
 src/main/resources/application.properties.example | 6 ------
 2 files changed, 14 deletions(-)
 delete mode 100644 src/main/resources/application.properties
 delete mode 100644 src/main/resources/application.properties.example

diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
deleted file mode 100644
index 755d30cd..00000000
--- a/src/main/resources/application.properties
+++ /dev/null
@@ -1,8 +0,0 @@
-spring.application.name=ironlibrary
-spring.jpa.hibernate.ddl-auto=update
-spring.jpa.show-sql=true
-spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MariaDBDialect
-spring.datasource.url=jdbc:mariadb://tommy.heliohost.org:3306/dsuarezg_ironhack
-spring.datasource.username=dsuarezg_ironhack
-spring.datasource.password=ironlibrary
-
diff --git a/src/main/resources/application.properties.example b/src/main/resources/application.properties.example
deleted file mode 100644
index 64ae825d..00000000
--- a/src/main/resources/application.properties.example
+++ /dev/null
@@ -1,6 +0,0 @@
-spring.application.name=myNameExample
-spring.datasource.url=jdbc:mysql://localhost:3306/myDatabaseExample
-spring.datasource.username=myUser
-spring.datasource.password=myPassword
-spring.jpa.hibernate.ddl-auto=validate
-spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQLDialect
\ No newline at end of file