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

public/lab9/task3/cart.html
517 строк17 KB
darkvoid6@mail.ru
ЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫЫ
18 дек 2025, 07:59
18 дек 2025, 07:59f2c4f06
<!DOCTYPE html>
<html lang="ru">
<head>
    <meta charset="UTF-8">
    <title>ЛР9 - Моя корзина</title>
    <style>
        body {
            font-family: "Segoe UI", system-ui, sans-serif;
            max-width: 1100px;
            margin: 2em auto;
            padding: 0 20px;
            background: #0a0e14;
            color: #b0bec5;
        }

        .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 {
            color: #7ee787;
            margin: 0 0 10px 0;
        }

        .back-link {
            color: #7ee787;
            text-decoration: none;
            font-weight: 500;
            border: 1px solid #238636;
            padding: 8px 16px;
            border-radius: 6px;
            transition: all 0.3s;
        }
        .back-link:hover {
            background: rgba(46, 160, 67, 0.1);
            border-color: #3fb950;
        }

        .cart-table {
            width: 100%;
            border-collapse: collapse;
            background: linear-gradient(145deg, #161b22 0%, #0d1117 100%);
            border-radius: 10px;
            overflow: hidden;
            border: 1px solid #30363d;
            margin-bottom: 20px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
        }

        .cart-table th {
            background: linear-gradient(135deg, #238636 0%, #2ea043 100%);
            color: #f0f6fc;
            padding: 18px;
            text-align: left;
            font-weight: 600;
            font-size: 16px;
        }

        .cart-table td {
            padding: 18px;
            border-bottom: 1px solid #30363d;
            vertical-align: middle;
        }

        .cart-table tr:hover {
            background: rgba(46, 160, 67, 0.05);
        }

        .cart-table tr:last-child td {
            border-bottom: none;
        }

        .quantity-controls {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .quantity-btn {
            width: 36px;
            height: 36px;
            border: 1px solid #3fb950;
            background: rgba(46, 160, 67, 0.1);
            color: #7ee787;
            border-radius: 6px;
            cursor: pointer;
            font-weight: bold;
            font-size: 18px;
            transition: all 0.3s;
        }

        .quantity-btn:hover:not(:disabled) {
            background: rgba(46, 160, 67, 0.2);
            transform: translateY(-2px);
        }

        .quantity-btn:disabled {
            border-color: #30363d;
            color: #484f58;
            cursor: not-allowed;
            background: transparent;
        }

        .quantity-display {
            min-width: 36px;
            text-align: center;
            font-weight: 600;
            font-size: 18px;
            color: #7ee787;
        }

        .remove-btn {
            background: linear-gradient(135deg, #da3633 0%, #f85149 100%);
            color: #f0f6fc;
            border: none;
            padding: 10px 18px;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 500;
            transition: all 0.3s;
            border: 1px solid #f85149;
        }

        .remove-btn:hover {
            background: linear-gradient(135deg, #f85149 0%, #ff6b6b 100%);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(248, 81, 73, 0.3);
        }

        .summary {
            background: linear-gradient(145deg, #161b22 0%, #0d1117 100%);
            padding: 25px;
            border-radius: 10px;
            border: 1px solid #30363d;
            margin-bottom: 30px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
        }

        .summary-row {
            display: flex;
            justify-content: space-between;
            margin-bottom: 15px;
            font-size: 17px;
        }

        .summary-total {
            font-size: 24px;
            font-weight: bold;
            color: #3fb950;
            border-top: 2px solid #30363d;
            padding-top: 20px;
            margin-top: 20px;
            text-shadow: 0 2px 8px rgba(63, 185, 80, 0.3);
        }

        .actions {
            display: flex;
            gap: 20px;
            justify-content: flex-end;
        }

        .action-btn {
            padding: 16px 32px;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            transition: all 0.3s;
            border: 1px solid;
        }

        .checkout-btn {
            background: linear-gradient(135deg, #1f6feb 0%, #2ea043 100%);
            color: #f0f6fc;
            border-color: #3fb950;
        }
        .checkout-btn:hover:not(:disabled) {
            transform: translateY(-3px);
            box-shadow: 0 8px 24px rgba(46, 160, 67, 0.4);
        }

        .purchase-btn {
            background: linear-gradient(135deg, #238636 0%, #3fb950 100%);
            color: #f0f6fc;
            border-color: #3fb950;
        }
        .purchase-btn:hover:not(:disabled) {
            transform: translateY(-3px);
            box-shadow: 0 8px 24px rgba(46, 160, 67, 0.4);
        }

        .action-btn:disabled {
            background: #21262d;
            color: #8b949e;
            border-color: #30363d;
            cursor: not-allowed;
            transform: none !important;
            box-shadow: none !important;
        }

        .empty-cart {
            text-align: center;
            padding: 60px;
            color: #7ee787;
            font-size: 18px;
        }
        .empty-cart h3 {
            margin-bottom: 20px;
            font-size: 28px;
            color: #7ee787;
        }

        .error, .success, .warning {
            padding: 18px;
            border-radius: 8px;
            margin: 15px 0;
            font-weight: 500;
            border: 1px solid;
            background: transparent;
        }

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

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

        .warning {
            color: #e3b341;
            border-color: #e3b341;
            background: rgba(227, 179, 65, 0.1);
        }

        .loading {
            text-align: center;
            padding: 40px;
            color: #7ee787;
            font-style: italic;
            font-size: 18px;
        }

        strong {
            color: #7ee787;
        }
    </style>
</head>
<body>
    <div class="header">
        <div>
            <h1 style="margin: 0;">🛒 Моя корзина</h1>
            <a href="/lab9/task3/" class="back-link">← Вернуться к товарам</a>
        </div>
        <div id="cartStats"></div>
    </div>

    <div id="cartContainer">
        <div class="loading">Загрузка корзины...</div>
    </div>

    <script>
        // (скрипт остается без изменений)
        const API_BASE = '/api/lab9/task3';
        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));
            renderCart();
        }

        function updateQuantity(productId, delta) {
            const item = cart.find(item => item.productId === productId);
            if (item) {
                const newQuantity = item.quantity + delta;
                if (newQuantity >= 1 && newQuantity <= 5 && newQuantity <= item.maxQuantity) {
                    item.quantity = newQuantity;
                    saveCartToStorage();
                }
            }
        }

        function removeFromCart(productId) {
            if (confirm('Удалить товар из корзины?')) {
                cart = cart.filter(item => item.productId !== productId);
                saveCartToStorage();
                showMessage('🗑️ Товар удален из корзины', 'success');
            }
        }

        function calculateTotal() {
            return cart.reduce((total, item) => total + (item.price * item.quantity), 0);
        }

        function calculateTotalItems() {
            return cart.reduce((total, item) => total + item.quantity, 0);
        }

        function renderCart() {
            const container = document.getElementById('cartContainer');
            const stats = document.getElementById('cartStats');

            if (cart.length === 0) {
                container.innerHTML = `
                    <div class="empty-cart">
                        <h3>😔 Корзина пуста</h3>
                        <p>Добавьте товары из каталога, чтобы сделать покупку</p>
                        <a href="/lab9/task3/" style="color: #7ee787; text-decoration: none; font-weight: bold; border: 1px solid #238636; padding: 10px 20px; border-radius: 6px; display: inline-block; margin-top: 20px;">
                            → Перейти к товарам
                        </a>
                    </div>
                `;
                stats.innerHTML = '';
                return;
            }

            const totalPrice = calculateTotal();
            const totalItems = calculateTotalItems();

            stats.innerHTML = `
                <div style="text-align: right;">
                    <div style="font-size: 24px; font-weight: bold; color: #3fb950;">${formatPrice(totalPrice)}</div>
                    <div style="color: #8b949e; font-size: 14px;">${totalItems} товар(ов)</div>
                </div>
            `;

            container.innerHTML = `
                <table class="cart-table">
                    <thead>
                        <tr>
                            <th>Товар</th>
                            <th>Цена</th>
                            <th>Количество</th>
                            <th>Стоимость</th>
                            <th>Действия</th>
                        </tr>
                    </thead>
                    <tbody>
                        ${cart.map(item => `
                            <tr>
                                <td>
                                    <strong>${item.productTitle}</strong>
                                    ${item.quantity > item.maxQuantity ? `
                                        <div style="color: #f85149; font-size: 13px; margin-top: 8px;">
                                            ⚠️ Максимум: ${item.maxQuantity} шт.
                                        </div>
                                    ` : ''}
                                </td>
                                <td>${formatPrice(item.price)}</td>
                                <td>
                                    <div class="quantity-controls">
                                        <button 
                                            class="quantity-btn" 
                                            onclick="updateQuantity(${item.productId}, -1)"
                                            ${item.quantity <= 1 ? 'disabled' : ''}
                                        >-</button>
                                        <span class="quantity-display">${item.quantity}</span>
                                        <button 
                                            class="quantity-btn" 
                                            onclick="updateQuantity(${item.productId}, 1)"
                                            ${item.quantity >= 5 || item.quantity >= item.maxQuantity ? 'disabled' : ''}
                                        >+</button>
                                    </div>
                                </td>
                                <td><strong>${formatPrice(item.price * item.quantity)}</strong></td>
                                <td>
                                    <button class="remove-btn" onclick="removeFromCart(${item.productId})">
                                        🗑️ Удалить
                                    </button>
                                </td>
                            </tr>
                        `).join('')}
                    </tbody>
                </table>

                <div class="summary">
                    <div class="summary-row">
                        <span>Количество товаров:</span>
                        <span>${totalItems} шт.</span>
                    </div>
                    <div class="summary-row summary-total">
                        <span>Общая стоимость:</span>
                        <span>${formatPrice(totalPrice)}</span>
                    </div>
                </div>

                <div class="actions">
                    <button class="action-btn checkout-btn" onclick="checkAvailability()">
                        ✅ Проверить наличие
                    </button>
                    <button class="action-btn purchase-btn" onclick="makePurchase()">
                        🎉 Купить
                    </button>
                </div>
            `;
        }

        async function checkAvailability() {
            const btn = document.querySelector('.checkout-btn');
            btn.disabled = true;
            btn.textContent = '⏳ Проверка...';

            try {
                const response = await fetch(`${API_BASE}/purchase`, {
                    method: 'POST',
                    headers: {
                        'Content-Type': 'application/json',
                    },
                    body: JSON.stringify({ cart })
                });

                if (response.ok) {
                    showMessage('✅ Все товары в наличии! Можно оформлять покупку.', 'success');
                } else {
                    const errorData = await response.json();
                    if (errorData.unavailableItems) {
                        let message = '❌ Недостаточно товара на складе:\n';
                        errorData.unavailableItems.forEach(item => {
                            message += `• ${item.productTitle}: нужно ${item.requested}, доступно ${item.available}\n`;
                        });
                        showMessage(message, 'error');
                    } else {
                        showMessage('❌ Ошибка при проверке наличия', 'error');
                    }
                }
            } catch (error) {
                showMessage(`❌ Ошибка сети: ${error.message}`, 'error');
            } finally {
                btn.disabled = false;
                btn.textContent = '✅ Проверить наличие';
            }
        }

        async function makePurchase() {
            const btn = document.querySelector('.purchase-btn');
            btn.disabled = true;
            btn.textContent = '⏳ Оформление...';

            try {
                const response = await fetch(`${API_BASE}/purchase`, {
                    method: 'POST',
                    headers: {
                        'Content-Type': 'application/json',
                    },
                    body: JSON.stringify({ cart })
                });

                if (response.ok) {
                    const result = await response.json();
                    showMessage('🎉 Покупка успешно оформлена! Товары списаны со склада.', 'success');
                    
                    cart = [];
                    saveCartToStorage();
                    
                    setTimeout(() => {
                        window.location.href = '/lab9/task3/';
                    }, 2000);
                    
                } else {
                    const errorData = await response.json();
                    showMessage(`❌ Ошибка: ${errorData.error}`, 'error');
                }
            } catch (error) {
                showMessage(`❌ Ошибка сети: ${error.message}`, 'error');
            } finally {
                btn.disabled = false;
                btn.textContent = '🎉 Купить';
            }
        }

        function showMessage(message, type) {
            const messageDiv = document.createElement('div');
            messageDiv.className = type === 'success' ? 'success' : 'error';
            messageDiv.style.whiteSpace = 'pre-line';
            messageDiv.textContent = message;
            
            document.body.insertBefore(messageDiv, document.getElementById('cartContainer'));
            
            setTimeout(() => {
                messageDiv.remove();
            }, 5000);
        }

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