London | ITP-May-2025 | Seddiq Azam | Module-Data-Flows | Book Library

debugging/book-library/index.html

@@ -23,23 +23,25 @@ <h1>Library</h1>
       <p>Add books to your virtual library</p>
     </div>
 
-    <button data-toggle="collapse" data-target="#demo" class="btn btn-info">
-      Add new book
-    </button>
+    <div class="text-center mb-3">
+      <button class="btn btn-info" data-toggle="collapse" data-target="#demo">Add New Book</button>
+      <button class="btn btn-success" onclick="viewReadBooks()">View Read Books</button>
+      <button class="btn btn-secondary" onclick="render()">View All Books</button>
+    </div>
 
     <div id="demo" class="collapse">
       <div class="form-group">
         <label for="title">Title:</label>
         <input
-          type="title"
+          type="text"
           class="form-control"
           id="title"
           name="title"
           required
         />
         <label for="author">Author: </label>
         <input
-          type="author"
+          type="text"
           class="form-control"
           id="author"
           name="author"

debugging/book-library/script.js

@@ -1,22 +1,15 @@
 let myLibrary = [];
 
-window.addEventListener("load", function (e) {
+window.addEventListener("load", function () {
   populateStorage();
   render();
 });
 
 function populateStorage() {
   if (myLibrary.length == 0) {
-    let book1 = new Book("Robison Crusoe", "Daniel Defoe", "252", true);
-    let book2 = new Book(
-      "The Old Man and the Sea",
-      "Ernest Hemingway",
-      "127",
-      true
-    );
-    myLibrary.push(book1);
-    myLibrary.push(book2);
-    render();
+    let book1 = new Book("Robinson Crusoe", "Daniel Defoe", "252", true);
+    let book2 = new Book("The Old Man and the Sea", "Ernest Hemingway", "127", true);
+    myLibrary.push(book1, book2);
   }
 }
 
@@ -25,79 +18,97 @@ const author = document.getElementById("author");
 const pages = document.getElementById("pages");
 const check = document.getElementById("check");
 
-//check the right input from forms and if its ok -> add the new book (object in array)
-//via Book function and start render function
 function submit() {
-  if (
-    title.value == null ||
-    title.value == "" ||
-    pages.value == null ||
-    pages.value == ""
-  ) {
-    alert("Please fill all fields!");
+  const titleValue = title.value.trim();
+  const authorValue = author.value.trim();
+  const pagesValue = pages.value.trim();
+
+  if (!titleValue || !authorValue || !pagesValue) {
+    alert("Please fill in all fields before submitting!");
+    return false;
+  }
+  if (isNaN(pagesValue) || parseInt(pagesValue) <= 0) {
+    alert("Please enter a valid number of pages!");
     return false;
-  } else {
-    let book = new Book(title.value, title.value, pages.value, check.checked);
-    library.push(book);
-    render();
   }
+
+  const book = new Book(titleValue, authorValue, pagesValue, check.checked);
+  myLibrary.push(book);
+
+  render();
+
+  // Clear the form
+  title.value = "";
+  author.value = "";
+  pages.value = "";
+  check.checked = false;
+
+  return false;
 }
 
 function Book(title, author, pages, check) {
   this.title = title;
   this.author = author;
-  this.pages = pages;
+  this.pages = parseInt(pages) || 0;
   this.check = check;
 }
 
-function render() {
+function clearTable() {
   let table = document.getElementById("display");
-  let rowsNumber = table.rows.length;
-  //delete old table
-  for (let n = rowsNumber - 1; n > 0; n-- {
-    table.deleteRow(n);
+  while (table.rows.length > 1) {
+    table.deleteRow(1);
   }
-  //insert updated row and cells
-  let length = myLibrary.length;
-  for (let i = 0; i < length; i++) {
+}
+
+function render() {
+  clearTable();
+  let table = document.getElementById("display");
+
+  myLibrary.forEach((book, i) => {
     let row = table.insertRow(1);
     let titleCell = row.insertCell(0);
     let authorCell = row.insertCell(1);
     let pagesCell = row.insertCell(2);
     let wasReadCell = row.insertCell(3);
     let deleteCell = row.insertCell(4);
-    titleCell.innerHTML = myLibrary[i].title;
-    authorCell.innerHTML = myLibrary[i].author;
-    pagesCell.innerHTML = myLibrary[i].pages;
-
-    //add and wait for action for read/unread button
-    let changeBut = document.createElement("button");
-    changeBut.id = i;
-    changeBut.className = "btn btn-success";
-    wasReadCell.appendChild(changeBut);
-    let readStatus = "";
-    if (myLibrary[i].check == false) {
-      readStatus = "Yes";
-    } else {
-      readStatus = "No";
-    }
-    changeBut.innerText = readStatus;
-
-    changeBut.addEventListener("click", function () {
-      myLibrary[i].check = !myLibrary[i].check;
+
+    titleCell.innerText = book.title;
+    authorCell.innerText = book.author;
+    pagesCell.innerText = book.pages;
+
+    let changeBtn = document.createElement("button");
+    changeBtn.className = "btn btn-success";
+    changeBtn.innerText = book.check ? "Yes" : "No";
+    changeBtn.onclick = () => {
+      book.check = !book.check;
       render();
-    });
+    };
+    wasReadCell.appendChild(changeBtn);
 
-    //add delete button to every row and render again
-    let delButton = document.createElement("button");
-    delBut.id = i + 5;
-    deleteCell.appendChild(delBut);
-    delBut.className = "btn btn-warning";
-    delBut.innerHTML = "Delete";
-    delBut.addEventListener("clicks", function () {
-      alert(`You've deleted title: ${myLibrary[i].title}`);
+    let delBtn = document.createElement("button");
+    delBtn.className = "btn btn-warning";
+    delBtn.innerText = "Delete";
+    delBtn.onclick = () => {
+      alert(`You've deleted title: ${book.title}`);
       myLibrary.splice(i, 1);
       render();
-    });
-  }
+    };
+    deleteCell.appendChild(delBtn);
+  });
 }
+
+function viewReadBooks() {
+  clearTable();
+  let table = document.getElementById("display");
+
+  myLibrary
+    .filter(book => book.check)
+    .forEach(book => {
+      let row = table.insertRow(1);
+      row.insertCell(0).innerText = book.title;
+      row.insertCell(1).innerText = book.author;
+      row.insertCell(2).innerText = book.pages;
+      row.insertCell(3).innerText = "Yes";
+      row.insertCell(4).innerText = "-";
+    });
+}

debugging/book-library/style.css

@@ -1,12 +1,14 @@
 .form-group {
-  width: 400px;
-  height: 300px;
-  align-self: left;
-  padding-left: 20px;
+  max-width: 400px;
+  padding: 20px;
+  margin: auto;
 }
 
-.btn {
-  display: block;
+button.btn {
+  margin: 10px;
+}
+.row .btn {
+  margin-right: 10px;
 }
 
 .form-check-label {