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100644 --- a/rust_session/student_registry/Cargo.toml +++ b/rust_session/student_registry/Cargo.toml @@ -2,3 +2,8 @@ name = "student_registry" version = "0.1.0" edition = "2021" + +[dependencies.uuid] +version = "1.23.3" +# Lets you generate random UUIDs +features = ["v4"] diff --git a/rust_session/student_registry/src/main.rs b/rust_session/student_registry/src/main.rs index 7ae18ff7..135cde6b 100644 --- a/rust_session/student_registry/src/main.rs +++ b/rust_session/student_registry/src/main.rs @@ -1,3 +1,4 @@ +// A Rust program to manage a student registry without UUIDs. mod grade; mod registry; mod student_struct; @@ -8,36 +9,80 @@ use registry::Registry; use student_struct::Student; fn main() { - // let g = Grade::Second; - // println!("{}", g.as_str()); // "2nd Year" - // println!("{:?}", g); - - // let ss = Student::new(); - // println!("stund") - - // let mut reg = Registry::new(); - - // reg.add("Victor", 20, Grade::First, 78.5); - // reg.add("Kosi", 22, Grade::Second, 64.0); - // reg.add("Yusrah", 21, Grade::First, 91.0); - - // reg.list_all();] + fn print_separator() { + println!(" "); + println!("=========================================================="); + println!("=========================================================="); + println!(" "); + } let sex = Sex::Male; println!("sex: {:?}", sex.to_str()); - // let s: Student = Student::new(1, String::from("Testimony"), 16, Sex::Female, Grade::Third, 40.5); let s: Student = Student::new( 1, - "Testimony".to_string(), + String::from("Testimony"), 16, Sex::Female, Grade::Third, 40.5, ); - println!("student here: {:#?}", s); - println!("student id: {}", s.id); - println!("student name: {}", s.name); - println!("student age: {}", s.age); + let mut registry = Registry::new(); + registry.add("Testimony", 16, Sex::Female, Grade::Third, 40.5); + registry.add("John", 17, Sex::Male, Grade::First, 88.0); + registry.add("James", 17, Sex::Male, Grade::First, 75.0); + registry.add("Fin", 17, Sex::Female, Grade::First, 12.0); + registry.list_all(); + registry.add("Mark", 20, Sex::Male, Grade::First, 72.0); + registry.add("Janet", 20, Sex::Female, Grade::First, 82.0); + let custom_id = registry.students[2].id; + print_separator(); + registry.list_all(); + let updated_student: Student = + Student::new(3, "Fin".to_string(), 17, Sex::Female, Grade::First, 12.0); + print_separator(); + registry.update(3, updated_student); + print_separator(); + registry.list_all(); + print_separator(); + registry.delete(3); + print_separator(); + registry.list_all(); + registry.delete(custom_id); + print_separator(); + registry.list_all(); } + +// A Rust program to manage a student registry with UUIDs. + +// mod grade; +// mod registry_uuid; +// mod student_struct_uuid; +// mod utils; + +// use grade::{Grade, Sex}; +// use registry_uuid::Registry; +// use student_struct_uuid::Student; + +// fn main() { +// let sex = Sex::Male; +// println!("sex: {:?}", sex.to_str()); + +// let s: Student = Student::new("Testimony".to_string(), 16, Sex::Female, Grade::Third, 40.5); + +// let mut registry = Registry::new(); +// registry.add("Testimony", 16, Sex::Female, Grade::Third, 40.5); +// registry.add("John", 17, Sex::Male, Grade::First, 88.0); +// registry.add("James", 17, Sex::Male, Grade::First, 75.0); +// registry.add("Fin", 17, Sex::Female, Grade::First, 12.0); +// registry.list_all(); +// registry.add("Mark", 20, Sex::Male, Grade::First, 72.0); +// registry.add("Janet", 20, Sex::Female, Grade::First, 82.0); +// let custom_id = registry.students[2].id; +// registry.list_all(); +// let updated_student: Student = +// Student::new("Fin".to_string(), 18, Sex::Female, Grade::Third, 40.5); +// registry.list_all(); +// registry.delete(custom_id); +// } diff --git a/rust_session/student_registry/src/registry.rs b/rust_session/student_registry/src/registry.rs index 146dc186..2885f089 100644 --- a/rust_session/student_registry/src/registry.rs +++ b/rust_session/student_registry/src/registry.rs @@ -1,12 +1,20 @@ use crate::grade::{Grade, Sex}; use crate::student_struct::Student; +#[derive(Debug)] pub struct Registry { pub students: Vec, next_id: u32, } impl Registry { + pub fn new() -> Self { + Registry { + students: Vec::new(), + next_id: 0, + } + } + pub fn add(&mut self, name: &str, age: u8, sex: Sex, grade: Grade, score: f32) { let id = self.next_id; let student = Student::new(id, name.to_string(), age, sex, grade, score); @@ -36,4 +44,47 @@ impl Registry { ); } } + + pub fn find_student_by_id(&self, id: u32) -> Option<&Student> { + match self.students.iter().find(|s| s.id == id) { + Some(s) => Some(s), + None => None, + } + } + + pub fn update(&mut self, id: u32, student: Student) { + let Some(s) = self.students.iter().find(|s| s.id == id) else { + println!("Student with ID {} not found", id); + return; + }; + + if student.name == s.name + && student.age == s.age + && student.grade == s.grade + && student.score == s.score + { + println!("No updates found, cannot make update."); + return; + } + + match self.students.iter_mut().find(|s| s.id == id) { + Some(s) => { + *s = student; + println!("Student with ID {} updated", id); + } + None => println!("Student with ID {} not found", id), + } + } + + pub fn delete(&mut self, id: u32) { + let position = self.students.iter().position(|s| s.id == id); + + match position { + Some(position_index) => { + self.students.remove(position_index); + println!("Student with ID {} has been deleted", id); + } + None => println!("Student with ID {} not found", id), + } + } } diff --git a/rust_session/student_registry/src/registry_uuid.rs b/rust_session/student_registry/src/registry_uuid.rs new file mode 100644 index 00000000..ef202712 --- /dev/null +++ b/rust_session/student_registry/src/registry_uuid.rs @@ -0,0 +1,89 @@ +use crate::grade::{Grade, Sex}; +use crate::student_struct_uuid::Student; +// use crate::student_struct_uuid::Students; +use uuid::Uuid; + +#[derive(Debug)] +pub struct Registry { + pub students: Vec, + next_id: Uuid, +} + +impl Registry { + pub fn new() -> Self { + Registry { + students: Vec::new(), + next_id: Uuid::new_v4(), + } + } + + pub fn add(&mut self, name: &str, age: u8, sex: Sex, grade: Grade, score: f32) { + let student = Student::new(name.to_string(), age, sex, grade, score); + println!("Added: {} (ID {})", student.name, student.id); + self.students.push(student); + self.next_id = Uuid::new_v4(); + } + + pub fn list_all(&self) { + if self.students.is_empty() { + println!(" (no students enrolled yet)"); + return; + } + println!( + " {:>20} {:<20} {:<6} {:<10} {}", + "ID", "Name", "Age", "Grade", "Score" + ); + println!(" {}", "-".repeat(85)); + for student in &self.students { + println!( + " {:>20} {:<20} {:>6} {:<10} {:.1}", + student.id, + student.name, + student.age, + student.grade.as_str(), + student.score, + ); + } + } + + pub fn find_student_by_id(&self, id: Uuid) -> Option<&Student> { + match self.students.iter().find(|s| s.id == id) { + Some(s) => Some(s), + None => None, + } + } + + pub fn update(&mut self, id: Uuid, student: Student) { + let Some(s) = self.students.iter().find(|s| s.id == id) else { + println!("Student with ID {} not found", id); + return; + }; + + if student.name == s.name + || student.age == s.age + || student.grade == s.grade + || student.score == s.score + { + println!("No updates found, cannot make update."); + return; + } + + match self.students.iter_mut().find(|s| s.id == id) { + Some(s) => { + *s = student; + } + None => println!("Student with ID {} not found", id), + } + } + + pub fn delete(&mut self, id: Uuid) { + let position = self.students.iter().position(|s| s.id == id); + match position { + Some(position_index) => { + self.students.remove(position_index); + println!("Student with ID {} has been deleted", id); + } + None => println!("Student with ID {} not found", id), + } + } +} diff --git a/rust_session/student_registry/src/student_struct_uuid.rs b/rust_session/student_registry/src/student_struct_uuid.rs new file mode 100644 index 00000000..678c7825 --- /dev/null +++ b/rust_session/student_registry/src/student_struct_uuid.rs @@ -0,0 +1,43 @@ +use crate::grade::{Grade, Sex}; +use uuid::Uuid; + +// A struct groups related pieces of data under one name. +// Think of it as a custom data type you design yourself. + +#[derive(Debug)] +pub struct Student { + pub id: Uuid, // u32 = unsigned 32-bit integer (no negatives) + pub name: String, // String = heap-allocated, growable text + pub age: u8, + pub sex: Sex, + pub grade: Grade, // our own enum type from above + pub score: f32, +} + +// This is the implementation of the student struct with its corresponding methods +impl Student { + pub fn new(name: String, age: u8, sex: Sex, grade: Grade, score: f32) -> Student { + Student { + id: Uuid::new_v4(), + name, + age, + sex, + grade, + score, + } + } +} + +#[derive(Debug)] +pub enum Status { + Pending, + Ongoing, + Completed, +} + +pub struct Todo { + id: Uuid, + title: String, + description: String, + status: Status, +}