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from flask import Flask, request, redirect |
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import json |
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import os |
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app = Flask(__name__) |
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DB_FILE = 'data.json' |
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def initialize_db(): |
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try: |
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with open(DB_FILE, 'w') as f: |
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json.dump([], f) |
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print(f"Файл {DB_FILE} успешно создан.") |
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except Exception as e: |
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print(f"Ошибка при создании файла {DB_FILE}: {e}") |
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def load_products(): |
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if not os.path.exists(DB_FILE): |
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initialize_db() |
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try: |
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with open(DB_FILE, 'r') as f: |
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products = json.load(f) |
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print(f"Данные успешно загружены из {DB_FILE}: {products}") |
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return products |
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except (json.JSONDecodeError, Exception) as e: |
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print(f"Ошибка при чтении файла {DB_FILE}: {e}") |
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return [] |
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def save_products(products): |
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try: |
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with open(DB_FILE, 'w') as f: |
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json.dump(products, f, indent=4) |
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print(f"Данные успешно сохранены в {DB_FILE}: {products}") |
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except Exception as e: |
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print(f"Ошибка при записи в файл {DB_FILE}: {e}") |
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def html_wrapper(content): |
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return f''' |
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<!DOCTYPE html> |
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<html> |
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<head> |
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<title>Каталог</title> |
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<style> |
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body {{ font-family: Arial, sans-serif; margin: 20px; }} |
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.header {{ font-size: 24px; margin-bottom: 20px; }} |
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.products {{ display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }} |
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.product {{ border: 1px solid #ddd; padding: 15px; border-radius: 5px; }} |
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form {{ max-width: 500px; margin: 20px auto; }} |
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input, textarea {{ width: 100%; margin: 5px 0; padding: 8px; }} |
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button {{ background: #4CAF50; color: white; padding: 10px; border: none; cursor: pointer; }} |
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nav {{ margin-bottom: 20px; }} |
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a {{ margin-right: 15px; text-decoration: none; color: #333; }} |
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</style> |
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</head> |
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<body> |
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<nav> |
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<a href="/">Каталог</a> |
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<a href="/admin">Админка</a> |
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</nav> |
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{content} |
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</body> |
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</html> |
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''' |
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@app.route('/') |
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def catalog(): |
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products = load_products() |
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if not products: |
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return html_wrapper('<div class="header">Каталог товаров пуст</div>') |
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products_html = ''.join([ |
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f'''<div class="product"> |
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<h3>{p['name']}</h3> |
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<p>{p['description']}</p> |
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<p>Цена: {p['price']} руб.</p> |
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</div>''' |
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for p in products |
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]) |
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return html_wrapper(f''' |
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<div class="header">Каталог товаров</div> |
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<div class="products">{products_html}</div> |
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''') |
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@app.route('/admin', methods=['GET', 'POST']) |
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def admin(): |
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if request.method == 'POST': |
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products = load_products() |
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try: |
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new_product = { |
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'name': request.form['name'], |
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'description': request.form['description'], |
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'price': float(request.form['price']) |
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} |
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products.append(new_product) |
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save_products(products) |
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print(f"Добавлен новый товар: {new_product}") |
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return redirect('/admin') |
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except ValueError as e: |
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print(f"Ошибка при добавлении товара: {e}") |
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return html_wrapper(f'<div class="header">Ошибка: {e}</div>') |
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return html_wrapper(''' |
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<div class="header">Админ-панель</div> |
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<form method="POST"> |
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<input type="text" name="name" placeholder="Название" required> |
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<textarea name="description" placeholder="Описание" required></textarea> |
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<input type="number" name="price" placeholder="Цена" required> |
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<button type="submit">Добавить товар</button> |
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</form> |
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''') |
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if __name__ == '__main__': |
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if not os.path.exists(DB_FILE): |
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initialize_db() |
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app.run(host='0.0.0.0', port=7860, debug=True) |
