public/lab9/task3/index.html - main - Cooolprogrammers/web-nodejs-labs

public/lab9/task3/index.html
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darkvoid6@mail.ru
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18 дек 2025, 07:59
18 дек 2025, 07:59f2c4f06
<!DOCTYPE html>
<html lang="ru">
<head>
    <meta charset="UTF-8">
    <title>ЛР9 - Задание 3 - Корзина покупок</title>
    <style>
        body {
            font-family: "Segoe UI", system-ui, sans-serif;
            max-width: 1400px;
            margin: 2em auto;
            padding: 0 20px;
            background: #0d1117;
            color: #c9d1d9;
        }

        .header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: linear-gradient(135deg, #161b22 0%, #0d1117 100%);
            padding: 25px;
            border-radius: 12px;
            margin-bottom: 30px;
            border: 1px solid #30363d;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
        }

        h1, h2 {
            margin: 0;
        }

        h1 {
            color: #7ee787;
            font-size: 28px;
        }

        h2 {
            color: #8b949e;
        }

        h3 {
            color: #7ee787;
            margin: 25px 0 15px 0;
        }

        .cart-link {
            background: linear-gradient(135deg, #238636 0%, #2ea043 100%);
            color: #f0f6fc;
            padding: 12px 24px;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: all 0.3s;
            border: 1px solid #3fb950;
        }

        .cart-link:hover {
            background: linear-gradient(135deg, #2ea043 0%, #3fb950 100%);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(46, 160, 67, 0.4);
        }

        .cart-badge {
            background: #f85149;
            color: #f0f6fc;
            border-radius: 50%;
            min-width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            border: 2px solid #0d1117;
        }

        .products-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 20px;
            margin-top: 20px;
        }

        .product-card {
            background: linear-gradient(145deg, #161b22 0%, #0d1117 100%);
            padding: 20px;
            border-radius: 10px;
            border: 1px solid #30363d;
            transition: all 0.3s;
            position: relative;
            display: flex;
            flex-direction: column;
        }

        .product-card:hover {
            transform: translateY(-5px);
            border-color: #7ee787;
            box-shadow: 0 12px 30px rgba(126, 231, 135, 0.15);
        }

        .in-cart-badge {
            position: absolute;
            top: 12px;
            right: 12px;
            background: #238636;
            color: #f0f6fc;
            padding: 6px 12px;
            border-radius: 6px;
            font-size: 12px;
            font-weight: 600;
            border: 1px solid #3fb950;
        }

        .product-title {
            font-weight: 600;
            font-size: 20px;
            margin-bottom: 10px;
            color: #7ee787;
        }

        .product-price {
            color: #3fb950;
            font-weight: 700;
            font-size: 24px;
            margin-bottom: 10px;
            text-shadow: 0 2px 8px rgba(63, 185, 80, 0.3);
        }

        .product-amount {
            color: #8b949e;
            margin-bottom: 20px;
            font-size: 14px;
        }

        .add-to-cart-btn {
            background: linear-gradient(135deg, #238636 0%, #2ea043 100%);
            color: #f0f6fc;
            border: 1px solid #3fb950;
            padding: 12px 20px;
            border-radius: 8px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            width: 100%;
            transition: all 0.3s;
            margin-top: auto;
        }

        .add-to-cart-btn:hover:not(:disabled) {
            background: linear-gradient(135deg, #2ea043 0%, #3fb950 100%);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(46, 160, 67, 0.4);
        }

        .add-to-cart-btn:disabled {
            background: #21262d;
            color: #8b949e;
            border-color: #30363d;
            cursor: not-allowed;
        }

        .error, .success {
            padding: 16px;
            border-radius: 8px;
            margin: 20px 0;
            font-weight: 600;
            border: 1px solid;
        }

        .error {
            background: rgba(248, 81, 73, 0.1);
            color: #f85149;
            border-color: #f85149;
        }

        .success {
            background: rgba(46, 160, 67, 0.1);
            color: #3fb950;
            border-color: #3fb950;
        }

        .loading {
            text-align: center;
            padding: 40px;
            color: #7ee787;
            font-style: italic;
            font-size: 18px;
        }
    </style>
</head>
<body>
    <div class="header">
        <div>
            <h1 style="margin: 0;">Лабораторная работа 9 - Задание 3</h1>
            <h2 style="margin: 0; color: #8b949e;">🛒 Корзина покупок</h2>
        </div>
        <a href="/lab9/task3/cart.html" class="cart-link" id="cartLink">
            🛒 Моя корзина <span class="cart-badge" id="cartBadge">0</span>
        </a>
    </div>

    <div id="productsContainer">
        <div class="loading">Загрузка товаров...</div>
    </div>

    <script>
        // (скрипт остается без изменений, так как требуется изменить только стили)
        const API_BASE = '/api/lab9';
        let allProducts = [];
        let cart = getCartFromStorage();

        function formatPrice(cents) {
            return (cents / 100).toLocaleString('ru-RU', {
                style: 'currency',
                currency: 'RUB'
            });
        }

        function getCartFromStorage() {
            try {
                return JSON.parse(localStorage.getItem('lab9_cart') || '[]');
            } catch {
                return [];
            }
        }

        function saveCartToStorage() {
            localStorage.setItem('lab9_cart', JSON.stringify(cart));
            updateCartBadge();
        }

        function updateCartBadge() {
            const totalItems = cart.reduce((sum, item) => sum + item.quantity, 0);
            document.getElementById('cartBadge').textContent = totalItems;
        }

        function addToCart(productId) {
            const existingItem = cart.find(item => item.productId === productId);
            
            if (existingItem) {
                if (existingItem.quantity < 5) {
                    existingItem.quantity++;
                } else {
                    alert('Максимальное количество товара в корзине - 5 шт.');
                    return;
                }
            } else {
                const product = allProducts.find(p => p.id === productId);
                if (product) {
                    cart.push({
                        productId: product.id,
                        productTitle: product.title,
                        price: product.price,
                        quantity: 1,
                        maxQuantity: Math.min(product.amount, 5)
                    });
                }
            }
            
            saveCartToStorage();
            renderProducts();
            showMessage('✅ Товар добавлен в корзину', 'success');
        }

        function getCartQuantity(productId) {
            const item = cart.find(item => item.productId === productId);
            return item ? item.quantity : 0;
        }

        async function loadProducts() {
            const container = document.getElementById('productsContainer');
            container.innerHTML = '<div class="loading">Загрузка товаров...</div>';

            try {
                const response = await fetch(`${API_BASE}/products`);
                allProducts = await response.json();
                renderProducts();
            } catch (error) {
                container.innerHTML = `<div class="error">Ошибка загрузки товаров: ${error.message}</div>`;
            }
        }

        function renderProducts() {
            const container = document.getElementById('productsContainer');
            
            container.innerHTML = `
                <h3>📦 Доступные товары</h3>
                <div class="products-grid">
                    ${allProducts.map(product => {
                        const cartQuantity = getCartQuantity(product.id);
                        const canAddMore = cartQuantity < 5 && product.amount > cartQuantity;
                        
                        return `
                            <div class="product-card">
                                ${cartQuantity > 0 ? `
                                    <div class="in-cart-badge">В корзине: ${cartQuantity}</div>
                                ` : ''}
                                <div class="product-title">${product.title}</div>
                                <div class="product-price">${formatPrice(product.price)}</div>
                                <div class="product-amount">На складе: ${product.amount} шт.</div>
                                <button 
                                    class="add-to-cart-btn" 
                                    onclick="addToCart(${product.id})"
                                    ${canAddMore ? '' : 'disabled'}
                                >
                                    ${canAddMore ? '➕ Добавить в корзину' : '❌ Недоступно'}
                                </button>
                            </div>
                        `;
                    }).join('')}
                </div>
            `;
        }

        function showMessage(message, type) {
            const messageDiv = document.createElement('div');
            messageDiv.className = type === 'success' ? 'success' : 'error';
            messageDiv.textContent = message;
            
            document.body.insertBefore(messageDiv, document.querySelector('.header').nextSibling);
            
            setTimeout(() => {
                messageDiv.remove();
            }, 3000);
        }

        window.addEventListener('load', () => {
            updateCartBadge();
            loadProducts();
        });
    </script>
</body>
</html>