Add product price history model and database schema: Implement associations for ProductPriceHistory with ProductType and RegionData. Update FalukantService to utilize active character for user-related operations. Ensure product price history table exists in the database with appropriate structure and indexing.

backend/models/associations.js

@@ -421,6 +421,13 @@ export default function setupAssociations() {
   DaySell.belongsTo(FalukantUser, { foreignKey: 'sellerId', as: 'user' });
   FalukantUser.hasMany(DaySell, { foreignKey: 'sellerId', as: 'daySells' });
 
+  // Produkt-Preishistorie (Zeitreihe für Preiskurven)
+  ProductPriceHistory.belongsTo(ProductType, { foreignKey: 'productId', as: 'productType' });
+  ProductType.hasMany(ProductPriceHistory, { foreignKey: 'productId', as: 'priceHistory' });
+
+  ProductPriceHistory.belongsTo(RegionData, { foreignKey: 'regionId', as: 'region' });
+  RegionData.hasMany(ProductPriceHistory, { foreignKey: 'regionId', as: 'productPriceHistory' });
+
   Notification.belongsTo(FalukantUser, { foreignKey: 'userId', as: 'user' });
   FalukantUser.hasMany(Notification, { foreignKey: 'userId', as: 'notifications' });
 

backend/models/falukant/log/product_price_history.js

@@ -0,0 +1,44 @@
+import { Model, DataTypes } from 'sequelize';
+import { sequelize } from '../../../utils/sequelize.js';
+
+/**
+ * Preishistorie pro Produkt und Region (Zeitreihe für Preis-Graphen).
+ * Aktuell wird diese Tabelle noch nicht befüllt; sie dient nur als Grundlage.
+ */
+class ProductPriceHistory extends Model { }
+
+ProductPriceHistory.init({
+    productId: {
+        type: DataTypes.INTEGER,
+        allowNull: false
+    },
+    regionId: {
+        type: DataTypes.INTEGER,
+        allowNull: false
+    },
+    price: {
+        type: DataTypes.DECIMAL(12, 2),
+        allowNull: false
+    },
+    recordedAt: {
+        type: DataTypes.DATE,
+        allowNull: false,
+        defaultValue: sequelize.literal('CURRENT_TIMESTAMP')
+    }
+}, {
+    sequelize,
+    modelName: 'ProductPriceHistory',
+    tableName: 'product_price_history',
+    schema: 'falukant_log',
+    timestamps: false,
+    underscored: true,
+    indexes: [
+        {
+            name: 'product_price_history_product_region_recorded_idx',
+            fields: ['product_id', 'region_id', 'recorded_at']
+        }
+    ]
+});
+
+export default ProductPriceHistory;
+

backend/models/index.js

@@ -89,6 +89,7 @@ import Learning from './falukant/data/learning.js';
 import Credit from './falukant/data/credit.js';
 import DebtorsPrism from './falukant/data/debtors_prism.js';
 import HealthActivity from './falukant/log/health_activity.js';
+import ProductPriceHistory from './falukant/log/product_price_history.js';
 
 // — Match3 Minigame —
 import Match3Campaign from './match3/campaign.js';
@@ -239,6 +240,7 @@ const models = {
   Credit,
   DebtorsPrism,
   HealthActivity,
+  ProductPriceHistory,
   RegionDistance,
   VehicleType,
   Vehicle,