101 lines
3.0 KiB
HTML
101 lines
3.0 KiB
HTML
<!doctype html>
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<html lang="en">
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<head>
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<meta charset="UTF-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.8/dist/css/bootstrap.css" />
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<title>Exercise: Nested If-Statements</title>
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</head>
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<body>
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<main>
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<div class="container py-5">
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<h1>Exercise: Nested If-Statements</h1>
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<hr />
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<div class="alert alert-primary">
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<h2>Übung 2: Bibliotheksverwaltung – Extraktion</h2>
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<p>
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Diese Übung setzt voraus, dass du die Übung Bibliotheksverwaltung abgeschlossen hast. Du kannst deine eigene
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Lösung oder eine Musterlösung für die Übung verwenden.
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</p>
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<p>
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Diesmal machst du den Code lesbarer und übersichtlicher, indem du die Kernlogik in separate Funktionen
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extrahierst. Erstelle eine neue Datei, kopiere den Code hinein und wende das Extraktionskonzept an.
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</p>
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</div>
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</div>
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</main>
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<script>
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'use strict';
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(() => {
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let isLibraryUpdating = false;
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let isUserLoggedIn = true;
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let hasLibrarianPermissions = false;
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let hasBookEditCapability = true;
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let hasBookAccess = true;
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const bookCollection = [
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{ title: 'Book A', price: 150, quantity: 5 },
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{ title: 'Book B', price: 250, quantity: 0 },
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{ title: 'Book C', price: 350, quantity: 10 },
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];
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// init
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const init = () => {
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handleLibraryOperations();
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};
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// Functions =======
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const handleLibraryOperations = () => {
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if (isLibraryUpdating) {
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console.log('Library system is currently updating.');
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return;
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}
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if (!isUserLoggedIn) {
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console.log('Please log in to manage books.');
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return;
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}
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if (!hasPermissions()) {
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console.log('Insufficient rights to manage books.');
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return;
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}
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bookCollection.forEach(logBook);
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};
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const logBook = (book) => {
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console.log(`Book Title: ${book.title}`);
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logBookPrice(book);
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logBookAvailability(book);
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console.log('---');
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};
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const logBookPrice = (book, threshold = 200) => {
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if (book.price > threshold) {
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console.log(`Book price is greater than ${threshold}.`);
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} else {
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console.log(`Book price is less than or equal to ${threshold}.`);
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}
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};
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const logBookAvailability = (book, stockAmount = 0) => {
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if (book.quantity > stockAmount) {
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console.log('Book is available.');
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} else {
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console.log('Book is unavailable.');
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}
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};
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const hasPermissions = () => {
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return hasLibrarianPermissions || (hasBookEditCapability && hasBookAccess);
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};
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init();
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})();
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</script>
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</body>
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</html>
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