lab 02

labs/02/css/style.css

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+/*
+    Chat Gipity glossed over some CSS for me
+    so I dont have to claw out my eyes looking
+    at my own hot garbage styling
+*/
+
+:root {
+    color: #172033;
+    background-color: #f5f7fb;
+    font-family: Arial, Helvetica, sans-serif;
+}
+
+* {
+    box-sizing: border-box;
+}
+
+body {
+    margin: 0;
+    min-height: 100vh;
+}
+
+main {
+    width: min(92%, 48rem);
+    margin: 3rem auto;
+}
+
+h1 {
+    margin: 0;
+    font-size: clamp(1.8rem, 5vw, 2.6rem);
+}
+
+.landing-page {
+    padding: 3rem;
+    text-align: center;
+    background-color: white;
+    border: 1px solid #d8deea;
+    border-radius: 0.75rem;
+    box-shadow: 0 0.75rem 2rem rgb(23 32 51 / 8%);
+}
+
+.student-name {
+    margin: 0.75rem 0 2rem;
+    color: #536078;
+    font-size: 1.15rem;
+}
+
+.page-links {
+    display: flex;
+    justify-content: center;
+    flex-wrap: wrap;
+    gap: 1rem;
+}
+
+.button-link,
+.back-link {
+    display: inline-block;
+    color: white;
+    background-color: #315fc4;
+    padding: 0.75rem 1.2rem;
+    border-radius: 0.4rem;
+    text-decoration: none;
+}
+
+.notes-page {
+    min-height: 36rem;
+    padding: 2rem;
+    background-color: white;
+    border: 1px solid #b9c4d8;
+    border-radius: 0.5rem;
+}
+
+.page-header {
+    display: flex;
+    align-items: flex-start;
+    justify-content: space-between;
+    gap: 1rem;
+    margin-bottom: 2rem;
+}
+
+.status {
+    min-height: 1.2rem;
+    margin: 0.4rem 0 0;
+    color: #536078;
+    white-space: nowrap;
+}
+
+.notes {
+    display: grid;
+    gap: 1rem;
+}
+
+.note {
+    display: grid;
+    grid-template-columns: minmax(0, 1fr) auto;
+    align-items: center;
+    gap: 1rem;
+}
+
+.note textarea {
+    min-height: 7rem;
+    padding: 0.8rem;
+    color: #172033;
+    background-color: #eef3ff;
+    border: 1px solid #8398c2;
+    border-radius: 0.35rem;
+    font: inherit;
+    resize: vertical;
+}
+
+button {
+    padding: 0.65rem 1rem;
+    border: 0;
+    border-radius: 0.35rem;
+    font: inherit;
+    font-weight: 600;
+    cursor: pointer;
+}
+
+.remove-button {
+    color: white;
+    background-color: #c43e45;
+}
+
+.add-button-control {
+    margin-top: 1rem;
+    color: white;
+    background-color: #2f7a42;
+}
+
+.back-link {
+    margin-top: 2rem;
+    background-color: #536078;
+}
+
+.reader-note {
+    min-height: 5rem;
+    margin: 0;
+    padding: 1rem;
+    color: white;
+    background-color: #315fc4;
+    border-radius: 0.35rem;
+    white-space: pre-wrap;
+    overflow-wrap: anywhere;
+}
+
+.empty-message {
+    color: #536078;
+}
+
+@media (max-width: 36rem) {
+    main {
+        margin: 1rem auto;
+    }
+
+    .landing-page,
+    .notes-page {
+        padding: 1.25rem;
+    }
+
+    .page-header,
+    .note {
+        grid-template-columns: 1fr;
+        flex-direction: column;
+    }
+
+    .status {
+        white-space: normal;
+    }
+
+    .remove-button {
+        justify-self: start;
+    }
+}

labs/02/index.html

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+<!DOCTYPE html>
+<html lang="en">
+    <head>
+        <meta charset="utf-8">
+        <meta name="viewport" content="width=device-width, initial-scale=1.0">
+
+        <link rel="stylesheet" href="./css/style.css">
+    </head>
+    <body>
+        <main class="landing-page">
+            <h1 id="page-title"></h1>
+            <br>
+
+            <nav class="page-links" aria-label="Lab pages">
+                <a id="writer-link" class="button-link" href="./writer.html"></a>
+                <a id="reader-link" class="button-link" href="./reader.html"></a>
+            </nav>
+        </main>
+
+        <script type="module" src="./js/script.js"></script>
+    </body>
+</html>

labs/02/js/script.js

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+import { STRINGS } from "../lang/messages/en/user.js";
+
+const STORAGE_KEY = "comp4537-lab2-notes";
+const UPDATE_INTERVAL = 2000;
+
+class NoteButton {
+  constructor(label, className, clickHandler) {
+    this.element = document.createElement("button");
+    this.element.type = "button";
+    this.element.classList.add(className);
+    this.element.textContent = label;
+    this.element.addEventListener("click", clickHandler);
+  }
+
+  getElement() {
+    return this.element;
+  }
+}
+
+class Note {
+  constructor(id, content, removeHandler) {
+    this.id = id;
+    this.container = document.createElement("article");
+    this.textArea = document.createElement("textarea");
+    this.removeButton = new NoteButton(
+      STRINGS.REMOVE_BUTTON,
+      "remove-button",
+      () => removeHandler(this)
+    );
+
+    this.container.classList.add("note");
+    this.textArea.value = content;
+    this.textArea.placeholder = STRINGS.NOTE_PLACEHOLDER;
+    this.textArea.setAttribute("aria-label", STRINGS.NOTE_PLACEHOLDER);
+
+    this.container.append(
+      this.textArea,
+      this.removeButton.getElement()
+    );
+  }
+
+  getElement() {
+    return this.container;
+  }
+
+  getData() {
+    return {
+      id: this.id,
+      content: this.textArea.value,
+    };
+  }
+
+  remove() {
+    this.container.remove();
+  }
+}
+
+class NoteStorage {
+  load() {
+    const storedNotes = localStorage.getItem(STORAGE_KEY);
+
+    if (storedNotes === null) {
+      return [];
+    }
+
+    try {
+      const notes = JSON.parse(storedNotes);
+      return Array.isArray(notes) ? notes : [];
+    } catch {
+      return [];
+    }
+  }
+
+  save(notes) {
+    localStorage.setItem(STORAGE_KEY, JSON.stringify(notes));
+  }
+}
+
+class Writer {
+  constructor(storage) {
+    this.storage = storage;
+    this.notes = [];
+    this.notesElement = document.getElementById("notes");
+    this.statusElement = document.getElementById("status");
+    this.addButtonElement = document.getElementById("add-button");
+  }
+
+  init() {
+    document.title = STRINGS.WRITER_TITLE;
+    document.getElementById("page-title").textContent = STRINGS.WRITER_TITLE;
+    document.getElementById("back-link").textContent = STRINGS.BACK_LINK;
+
+    const addButton = new NoteButton(
+      STRINGS.ADD_BUTTON,
+      "add-button-control",
+      () => this.addNote()
+    );
+
+    this.addButtonElement.replaceWith(addButton.getElement());
+
+    for (const noteData of this.storage.load()) {
+      this.createNote(noteData.id, noteData.content);
+    }
+
+    window.setInterval(() => this.saveNotes(), UPDATE_INTERVAL);
+  }
+
+  addNote() {
+    const id = `${Date.now()}-${Math.random()}`;
+    this.createNote(id, "");
+  }
+
+  createNote(id, content) {
+    const note = new Note(id, content, (selectedNote) => {
+      this.removeNote(selectedNote);
+    });
+
+    this.notes.push(note);
+    this.notesElement.appendChild(note.getElement());
+  }
+
+  removeNote(note) {
+    this.notes = this.notes.filter((currentNote) => currentNote !== note);
+    note.remove();
+    this.saveNotes();
+  }
+
+  saveNotes() {
+    const noteData = this.notes.map((note) => note.getData());
+    this.storage.save(noteData);
+    this.statusElement.textContent = STRINGS.STORED_AT + this.getCurrentTime();
+  }
+
+  getCurrentTime() {
+    return new Date().toLocaleTimeString();
+  }
+}
+
+class Reader {
+  constructor(storage) {
+    this.storage = storage;
+    this.notesElement = document.getElementById("notes");
+    this.statusElement = document.getElementById("status");
+  }
+
+  init() {
+    document.title = STRINGS.READER_TITLE;
+    document.getElementById("page-title").textContent = STRINGS.READER_TITLE;
+    document.getElementById("back-link").textContent = STRINGS.BACK_LINK;
+
+    this.updateNotes();
+    window.setInterval(() => this.updateNotes(), UPDATE_INTERVAL);
+    window.addEventListener("storage", (event) => {
+      if (event.key === STORAGE_KEY) {
+        this.updateNotes();
+      }
+    });
+  }
+
+  updateNotes() {
+    const notes = this.storage.load();
+    this.notesElement.replaceChildren();
+
+    if (notes.length === 0) {
+      const message = document.createElement("p");
+      message.classList.add("empty-message");
+      message.textContent = STRINGS.EMPTY_NOTES;
+      this.notesElement.appendChild(message);
+    } else {
+      for (const note of notes) {
+        const noteElement = document.createElement("p");
+        noteElement.classList.add("reader-note");
+        noteElement.textContent = note.content;
+        this.notesElement.appendChild(noteElement);
+      }
+    }
+
+    this.statusElement.textContent = STRINGS.UPDATED_AT + this.getCurrentTime();
+  }
+
+  getCurrentTime() {
+    return new Date().toLocaleTimeString();
+  }
+}
+
+class LandingPage {
+  init() {
+    document.title = STRINGS.INDEX_TITLE;
+    document.getElementById("page-title").textContent   = STRINGS.INDEX_TITLE;
+    document.getElementById("writer-link").textContent  = STRINGS.WRITER_LINK;
+    document.getElementById("reader-link").textContent  = STRINGS.READER_LINK;
+  }
+}
+
+const storage = new NoteStorage();
+const pageName = window.location.pathname.split("/").pop() || "index.html";
+
+if (pageName === "writer.html") {
+  new Writer(storage).init();
+} else if (pageName === "reader.html") {
+  new Reader(storage).init();
+} else {
+  new LandingPage().init();
+}

labs/02/lang/messages/en/user.js

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+export const STRINGS = {
+  INDEX_TITLE:      "Lab 1: JSON, Object Constructor, localStorage",
+  WRITER_LINK:      "Write Notes",
+  READER_LINK:      "Read Notes",
+  WRITER_TITLE:     "Writer",
+  READER_TITLE:     "Reader",
+  ADD_BUTTON:       "Add Note",
+  REMOVE_BUTTON:    "Remove",
+  BACK_LINK:        "Back to Home",
+  NOTE_PLACEHOLDER: "Enter a note...",
+  EMPTY_NOTES:      "There are no notes to display.",
+  STORED_AT:        "Stored at: ",
+  UPDATED_AT:       "Updated at: ",
+};

labs/02/reader.html

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+<!DOCTYPE html>
+<html lang="en">
+    <head>
+        <meta charset="utf-8">
+        <meta name="viewport" content="width=device-width, initial-scale=1.0">
+
+        <link rel="stylesheet" href="./css/style.css">
+    </head>
+    <body>
+        <main class="notes-page">
+            <header class="page-header">
+                <h1 id="page-title"></h1>
+                <p id="status" class="status" aria-live="polite"></p>
+            </header>
+
+            <section id="notes" class="notes reader-notes" aria-label="Notes"></section>
+
+            <a id="back-link" class="back-link" href="./index.html"></a>
+        </main>
+
+        <script type="module" src="./js/script.js"></script>
+    </body>
+</html>

labs/02/writer.html

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+<!DOCTYPE html>
+<html lang="en">
+    <head>
+        <meta charset="utf-8">
+        <meta name="viewport" content="width=device-width, initial-scale=1.0">
+
+        <link rel="stylesheet" href="./css/style.css">
+    </head>
+    <body>
+        <main class="notes-page">
+            <header class="page-header">
+                <h1 id="page-title"></h1>
+                <p id="status" class="status" aria-live="polite"></p>
+            </header>
+
+            <section id="notes" class="notes" aria-label="Notes"></section>
+            <button id="add-button" class="add-button" type="button"></button>
+
+            <a id="back-link" class="back-link" href="./index.html"></a>
+        </main>
+
+        <script type="module" src="./js/script.js"></script>
+    </body>
+</html>