backend fitur produk dan transaki

lib/services/ml_service.dart

@@ -237,15 +237,26 @@ class MLService {
       } else if (response.statusCode == 409) {
         final result = jsonDecode(response.body);
         return result;
-      } else {
+      } else if (response.statusCode == 400) {
+        final result = jsonDecode(response.body);
         return {
           'status': 'error',
-          'message': 'Server error: ${response.statusCode}',
+          'message': result['message'] ?? 'Bad request'
+        };
+      } else {
+        print('Create product error - Status: ${response.statusCode}');
+        print('Response body: ${response.body}');
+        return {
+          'status': 'error',
+          'message': 'Server error: ${response.statusCode}'
         };
       }
     } catch (e) {
-      print('Create product error: $e');
+      print('Create product exception: $e');
-      return {'status': 'error', 'message': 'Connection error: $e'};
+      return {
+        'status': 'error',
+        'message': 'Connection error: $e'
+      };
     }
   }
 

ml_model/setup_database.sql

@@ -0,0 +1,121 @@
+-- Create Database and Tables for Prediksi Stok Bahan Kue
+-- Run this in MySQL to setup the database
+
+-- Create Database
+CREATE DATABASE IF NOT EXISTS prediksi_stok_db;
+USE prediksi_stok_db;
+
+-- Create Products Table
+CREATE TABLE IF NOT EXISTS products (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    name VARCHAR(255) NOT NULL UNIQUE,
+    category VARCHAR(100) NOT NULL,
+    price INT NOT NULL,
+    current_stock INT NOT NULL DEFAULT 0,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+-- Create Transactions Table
+CREATE TABLE IF NOT EXISTS transactions (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    product_name VARCHAR(255) NOT NULL,
+    category VARCHAR(100) NOT NULL,
+    quantity INT NOT NULL,
+    unit_price INT NOT NULL,
+    total_price INT NOT NULL,
+    transaction_date DATE NOT NULL,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+-- Create Predictions Table
+CREATE TABLE IF NOT EXISTS predictions (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    product_name VARCHAR(255) NOT NULL,
+    category VARCHAR(100) NOT NULL,
+    unit_price INT NOT NULL,
+    prediction_date DATE NOT NULL,
+    predicted_quantity INT NOT NULL,
+    raw_value FLOAT,
+    estimated_total_price INT,
+    accuracy_r2 FLOAT,
+    error_mae FLOAT,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+-- Create Recipes Table
+CREATE TABLE IF NOT EXISTS recipes (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    recipe_name VARCHAR(255) NOT NULL,
+    description TEXT,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+-- Create Recipe Ingredients Table
+CREATE TABLE IF NOT EXISTS recipe_ingredients (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    recipe_id INT NOT NULL,
+    product_name VARCHAR(255) NOT NULL,
+    quantity_needed FLOAT NOT NULL,
+    unit VARCHAR(50) NOT NULL,
+    FOREIGN KEY (recipe_id) REFERENCES recipes(id) ON DELETE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+-- Insert Initial Products (8 items)
+INSERT INTO products (name, category, price, current_stock) VALUES
+('Tepung Terigu 1kg', 'Tepung', 15000, 50),
+('Telur 1kg', 'Telur', 25000, 30),
+('Gula Pasir 1kg', 'Gula', 12000, 40),
+('Susu Bubuk', 'Susu', 20000, 20),
+('Cokelat Bubuk 250gr', 'Cokelat', 18000, 15),
+('Mentega 500gr', 'Mentega', 22000, 25),
+('Keju Parut 250gr', 'Keju', 28000, 10),
+('Baking Powder', 'Bahan Tambahan', 8000, 35);
+
+-- Insert Sample Recipes
+INSERT INTO recipes (recipe_name, description) VALUES
+('Donat', 'Resep donat lezat'),
+('Roti Putih', 'Resep roti putih'),
+('Kue Brownies', 'Resep brownies cokelat'),
+('Kue Tart', 'Resep kue tart');
+
+-- Insert Recipe Ingredients
+-- Donat
+INSERT INTO recipe_ingredients (recipe_id, product_name, quantity_needed, unit) VALUES
+(1, 'Tepung Terigu 1kg', 0.5, 'kg'),
+(1, 'Telur 1kg', 2, 'butir'),
+(1, 'Gula Pasir 1kg', 0.1, 'kg'),
+(1, 'Mentega 500gr', 0.05, 'kg'),
+(1, 'Baking Powder', 0.005, 'kg');
+
+-- Roti Putih
+INSERT INTO recipe_ingredients (recipe_id, product_name, quantity_needed, unit) VALUES
+(2, 'Tepung Terigu 1kg', 0.8, 'kg'),
+(2, 'Telur 1kg', 3, 'butir'),
+(2, 'Gula Pasir 1kg', 0.08, 'kg'),
+(2, 'Mentega 500gr', 0.08, 'kg'),
+(2, 'Susu Bubuk', 0.05, 'kg'),
+(2, 'Baking Powder', 0.008, 'kg');
+
+-- Kue Brownies
+INSERT INTO recipe_ingredients (recipe_id, product_name, quantity_needed, unit) VALUES
+(3, 'Tepung Terigu 1kg', 0.3, 'kg'),
+(3, 'Cokelat Bubuk 250gr', 0.1, 'kg'),
+(3, 'Telur 1kg', 4, 'butir'),
+(3, 'Gula Pasir 1kg', 0.2, 'kg'),
+(3, 'Mentega 500gr', 0.15, 'kg'),
+(3, 'Baking Powder', 0.005, 'kg');
+
+-- Kue Tart
+INSERT INTO recipe_ingredients (recipe_id, product_name, quantity_needed, unit) VALUES
+(4, 'Tepung Terigu 1kg', 0.4, 'kg'),
+(4, 'Telur 1kg', 5, 'butir'),
+(4, 'Gula Pasir 1kg', 0.15, 'kg'),
+(4, 'Mentega 500gr', 0.2, 'kg'),
+(4, 'Keju Parut 250gr', 0.1, 'kg'),
+(4, 'Susu Bubuk', 0.08, 'kg');
+
+-- Verify tables created
+SELECT 'Tables created successfully!' as status;
+SELECT COUNT(*) as total_products FROM products;
+SELECT COUNT(*) as total_recipes FROM recipes;

test_backend.py

@@ -0,0 +1,93 @@
+#!/usr/bin/env python3
+"""
+Simple backend connectivity test
+Run: python test_backend.py
+"""
+
+import requests
+import json
+from datetime import datetime
+
+# Change this to your backend URL
+BACKEND_URL = "http://192.168.1.2:5000"
+
+def test_health():
+    """Test if backend is running"""
+    try:
+        print("\n[TEST 1] Health Check")
+        print(f"URL: {BACKEND_URL}/health")
+        response = requests.get(f"{BACKEND_URL}/health", timeout=5)
+        print(f"Status: {response.status_code}")
+        print(f"Response: {response.json()}")
+        return response.status_code == 200
+    except Exception as e:
+        print(f"❌ Error: {e}")
+        return False
+
+def test_get_products():
+    """Test get products endpoint"""
+    try:
+        print("\n[TEST 2] Get Products")
+        print(f"URL: {BACKEND_URL}/products")
+        response = requests.get(f"{BACKEND_URL}/products", timeout=5)
+        print(f"Status: {response.status_code}")
+        data = response.json()
+        print(f"Total products: {data.get('total', 0)}")
+        if data.get('products'):
+            print(f"First product: {data['products'][0]}")
+        return response.status_code == 200
+    except Exception as e:
+        print(f"❌ Error: {e}")
+        return False
+
+def test_create_product():
+    """Test create product endpoint"""
+    try:
+        print("\n[TEST 3] Create Product")
+        print(f"URL: {BACKEND_URL}/products")
+
+        payload = {
+            "name": f"Test Produk {datetime.now().strftime('%H%M%S')}",
+            "category": "Test",
+            "price": 10000,
+            "current_stock": 5
+        }
+        print(f"Payload: {json.dumps(payload, indent=2)}")
+
+        response = requests.post(
+            f"{BACKEND_URL}/products",
+            json=payload,
+            headers={"Content-Type": "application/json"},
+            timeout=5
+        )
+        print(f"Status: {response.status_code}")
+        print(f"Response: {response.json()}")
+        return response.status_code in [201, 409]
+    except Exception as e:
+        print(f"❌ Error: {e}")
+        return False
+
+if __name__ == "__main__":
+    print("="*80)
+    print(f"Backend Connectivity Test - {BACKEND_URL}")
+    print("="*80)
+
+    tests = [
+        ("Health Check", test_health()),
+        ("Get Products", test_get_products()),
+        ("Create Product", test_create_product()),
+    ]
+
+    print("\n" + "="*80)
+    print("SUMMARY:")
+    for test_name, result in tests:
+        status = "✅ PASS" if result else "❌ FAIL"
+        print(f"  {status}: {test_name}")
+
+    print("="*80)
+
+    all_passed = all(result for _, result in tests)
+    if all_passed:
+        print("\n✅ Backend is working correctly!")
+    else:
+        print("\n❌ Some tests failed. Check your backend connection.")