Implement server-side order persistence with SQLite and Flask API

backend/order-service.py

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+from flask import Flask, request, jsonify
+import sqlite3
+import os
+import json
+from datetime import datetime
+
+app = Flask(__name__)
+
+# Database setup
+DB_PATH = '/data/services-order.db'
+os.makedirs('/data', exist_ok=True)
+
+def init_db():
+    """Initialize the database with orders table"""
+    conn = sqlite3.connect(DB_PATH)
+    cursor = conn.cursor()
+    cursor.execute('''
+        CREATE TABLE IF NOT EXISTS service_order (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            user_id TEXT NOT NULL DEFAULT 'default',
+            order_data TEXT NOT NULL,
+            updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+        )
+    ''')
+    conn.commit()
+    conn.close()
+
+# Initialize database on startup
+init_db()
+
+@app.route('/api/order', methods=['GET'])
+def get_order():
+    """Get the saved service order"""
+    user_id = request.args.get('user_id', 'default')
+    
+    try:
+        conn = sqlite3.connect(DB_PATH)
+        cursor = conn.cursor()
+        cursor.execute(
+            'SELECT order_data FROM service_order WHERE user_id = ? ORDER BY updated_at DESC LIMIT 1',
+            (user_id,)
+        )
+        row = cursor.fetchone()
+        conn.close()
+        
+        if row:
+            return jsonify(json.loads(row[0])), 200
+        else:
+            return jsonify({}), 200
+    except Exception as e:
+        return jsonify({'error': str(e)}), 500
+
+@app.route('/api/order', methods=['POST'])
+def save_order():
+    """Save the service order"""
+    user_id = request.json.get('user_id', 'default')
+    order_data = request.json.get('order', {})
+    
+    if not order_data:
+        return jsonify({'error': 'No order data provided'}), 400
+    
+    try:
+        conn = sqlite3.connect(DB_PATH)
+        cursor = conn.cursor()
+        
+        # Check if user already has an order
+        cursor.execute('SELECT id FROM service_order WHERE user_id = ?', (user_id,))
+        existing = cursor.fetchone()
+        
+        if existing:
+            # Update existing order
+            cursor.execute(
+                'UPDATE service_order SET order_data = ?, updated_at = CURRENT_TIMESTAMP WHERE user_id = ?',
+                (json.dumps(order_data), user_id)
+            )
+        else:
+            # Insert new order
+            cursor.execute(
+                'INSERT INTO service_order (user_id, order_data) VALUES (?, ?)',
+                (user_id, json.dumps(order_data))
+            )
+        
+        conn.commit()
+        conn.close()
+        
+        return jsonify({'success': True, 'message': 'Order saved'}), 200
+    except Exception as e:
+        return jsonify({'error': str(e)}), 500
+
+@app.route('/api/order', methods=['DELETE'])
+def delete_order():
+    """Delete saved order (reset to default)"""
+    user_id = request.args.get('user_id', 'default')
+    
+    try:
+        conn = sqlite3.connect(DB_PATH)
+        cursor = conn.cursor()
+        cursor.execute('DELETE FROM service_order WHERE user_id = ?', (user_id,))
+        conn.commit()
+        conn.close()
+        
+        return jsonify({'success': True, 'message': 'Order deleted'}), 200
+    except Exception as e:
+        return jsonify({'error': str(e)}), 500
+
+@app.route('/health', methods=['GET'])
+def health():
+    """Health check endpoint"""
+    return jsonify({'status': 'ok'}), 200
+
+if __name__ == '__main__':
+    app.run(host='0.0.0.0', port=8082)