feat: add prototype for Proofreading Tool lab

fullstack-cert/js-projects/lab-signal-pattern-detector/script.js

@@ -0,0 +1,49 @@
+function findRepeatedPhrases(words, phraseLength) {
+  const repeatedWordsIndecies = []
+
+  for (let i = 0; i <= words.length - phraseLength; i++) {
+    for (let j = i + 1; j <= words.length - phraseLength; j++) {
+      let match = true
+
+      for (let k = 0; k < phraseLength; k++) {
+        if (words[i + k] !== words[j + k]) {
+          match = false
+          break
+        }
+      }
+
+      if (match) {
+        repeatedWordsIndecies.push(i)
+        break
+      }
+    }
+  }
+
+  return repeatedWordsIndecies
+}
+
+function findPalindromeBreaks(words) {
+  const palindromesBroken = []
+
+  for (let i = 0; i < Math.floor(words.length / 2); i++) {
+    const palindromeIndex = words.length - 1 - i
+
+    if (words[i] !== words[palindromeIndex]) {
+      palindromesBroken.push(i)
+    }
+  }
+
+  return palindromesBroken
+}
+
+function analyseTexts(texts, phraseLength) {
+  let results = []
+  for (let i = 0; i < texts.length; i++) {
+    const repeatedPhrases = findRepeatedPhrases(texts[i], phraseLength)
+    const palindromeBreaks = findPalindromeBreaks(texts[i])
+
+    results.push({ repeatedPhrases, palindromeBreaks })
+  }
+
+  return results
+}

fullstack-cert/js-projects/lab-signal-pattern-detector/user-stories.md

@@ -0,0 +1,9 @@
+In this lab, you will create a proofreading tool, a tool that checks text for repeated phrases and palindrome breaks.
+
+**Objective**: Fulfill the user stories below and get all the tests to pass to complete the lab.
+
+**User Stories**:
+
+1. You should implement `findRepeatedPhrases(words, phraseLength)` - given an array of words and a phrase length, find the starting indices of any repeated word sequences. Use nested loops with early exit `break` flags.
+2. You should implement `findPalindromeBreaks(words)` — given an array of words, find the indices where the word-level palindrome is broken.
+3. You should implement `analyseTexts(texts, phraseLength)` — run both checks on each text in an array and return an array of result objects.