2026-11-03 11:40:59 +01:00
parent a885cd9550
commit baf557f666
17 changed files with 1158 additions and 19 deletions
@@ -0,0 +1,100 @@
+<!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="https://cdn.jsdelivr.net/npm/bootstrap@5.3.8/dist/css/bootstrap.css" />
+    <title>Exercise: Nested If-Statements</title>
+  </head>
+  <body>
+    <main>
+      <div class="container py-5">
+        <h1>Exercise: Nested If-Statements</h1>
+        <hr />
+        <div class="alert alert-primary">
+          <h2>Übung 2: Bibliotheksverwaltung – Extraktion</h2>
+          <p>
+            Diese Übung setzt voraus, dass du die Übung Bibliotheksverwaltung abgeschlossen hast. Du kannst deine eigene
+            Lösung oder eine Musterlösung für die Übung verwenden.
+          </p>
+          <p>
+            Diesmal machst du den Code lesbarer und übersichtlicher, indem du die Kernlogik in separate Funktionen
+            extrahierst. Erstelle eine neue Datei, kopiere den Code hinein und wende das Extraktionskonzept an.
+          </p>
+        </div>
+      </div>
+    </main>
+
+    <script>
+      'use strict';
+      (() => {
+        let isLibraryUpdating = false;
+        let isUserLoggedIn = true;
+        let hasLibrarianPermissions = false;
+        let hasBookEditCapability = true;
+        let hasBookAccess = true;
+
+        const bookCollection = [
+          { title: 'Book A', price: 150, quantity: 5 },
+          { title: 'Book B', price: 250, quantity: 0 },
+          { title: 'Book C', price: 350, quantity: 10 },
+        ];
+
+        // init
+        const init = () => {
+          handleLibraryOperations();
+        };
+
+        // Functions =======
+
+        const handleLibraryOperations = () => {
+          if (isLibraryUpdating) {
+            console.log('Library system is currently updating.');
+            return;
+          }
+
+          if (!isUserLoggedIn) {
+            console.log('Please log in to manage books.');
+            return;
+          }
+
+          if (!hasPermissions()) {
+            console.log('Insufficient rights to manage books.');
+            return;
+          }
+
+          bookCollection.forEach(logBook);
+        };
+
+        const logBook = (book) => {
+          console.log(`Book Title: ${book.title}`);
+          logBookPrice(book);
+          logBookAvailability(book);
+          console.log('---');
+        };
+
+        const logBookPrice = (book, threshold = 200) => {
+          if (book.price > threshold) {
+            console.log(`Book price is greater than ${threshold}.`);
+          } else {
+            console.log(`Book price is less than or equal to ${threshold}.`);
+          }
+        };
+
+        const logBookAvailability = (book, stockAmount = 0) => {
+          if (book.quantity > stockAmount) {
+            console.log('Book is available.');
+          } else {
+            console.log('Book is unavailable.');
+          }
+        };
+
+        const hasPermissions = () => {
+          return hasLibrarianPermissions || (hasBookEditCapability && hasBookAccess);
+        };
+
+        init();
+      })();
+    </script>
+  </body>
+</html>