Enhance FalukantService with character caching and optimized city retrieval: Introduce caching for cities with branch types to reduce database queries, and streamline character retrieval logic. Update product and knowledge fetching to improve performance and maintainability.

backend/services/falukantService.js

@@ -4541,36 +4541,47 @@ class FalukantService extends BaseService {
         const priceByProduct = new Map(items.map(i => [i.productId, i.currentPrice]));
 
         const user = await this.getFalukantUserByHashedId(hashedUserId);
-        const character = await FalukantCharacter.findOne({ where: { userId: user.id } });
+        const character = user.character || await FalukantCharacter.findOne({ where: { userId: user.id }, attributes: ['id'] });
         if (!character) {
             throw new Error(`No FalukantCharacter found for user with id ${user.id}`);
         }
+        const characterId = character.id;
 
-        const [products, knowledges, cities, townWorths] = await Promise.all([
+        let citiesWithBranchType = FalukantService._citiesBatchCache?.get(user.id);
+        const now = Date.now();
+        if (citiesWithBranchType && citiesWithBranchType.expires > now) {
+            citiesWithBranchType = citiesWithBranchType.data;
+        } else {
+            const cityRows = await sequelize.query(
+                `SELECT r.id, r.name,
+  MAX(CASE WHEN bt.label_tr IN ('store','fullstack') THEN 2 WHEN bt.label_tr = 'production' THEN 1 ELSE 0 END) AS branch_type_sort
+FROM falukant_data.region r
+INNER JOIN falukant_type.region rt ON r.region_type_id = rt.id AND rt.label_tr = 'city'
+LEFT JOIN falukant_data.branch b ON b.region_id = r.id AND b.falukant_user_id = :userId
+LEFT JOIN falukant_type.branch bt ON b.branch_type_id = bt.id
+GROUP BY r.id, r.name
+ORDER BY r.id`,
+                { replacements: { userId: user.id }, type: sequelize.QueryTypes.SELECT }
+            );
+            const branchTypeByCityId = new Map();
+            const cities = [];
+            for (const row of cityRows) {
+                cities.push({ id: row.id, name: row.name });
+                const sort = row.branch_type_sort ?? 0;
+                branchTypeByCityId.set(row.id, sort === 2 ? 'store' : sort === 1 ? 'production' : null);
+            }
+            citiesWithBranchType = { cities, branchTypeByCityId };
+            if (!FalukantService._citiesBatchCache) FalukantService._citiesBatchCache = new Map();
+            FalukantService._citiesBatchCache.set(user.id, { data: citiesWithBranchType, expires: now + 60000 });
+        }
+        const { cities, branchTypeByCityId } = citiesWithBranchType;
+
+        const [products, knowledges, townWorths] = await Promise.all([
             ProductType.findAll({ where: { id: { [Op.in]: productIds } }, attributes: ['id', 'sellCost'] }),
             Knowledge.findAll({
-                where: { characterId: character.id, productId: { [Op.in]: productIds } },
+                where: { characterId: characterId, productId: { [Op.in]: productIds } },
                 attributes: ['productId', 'knowledge']
             }),
-            RegionData.findAll({
-                attributes: ['id', 'name'],
-                include: [
-                    {
-                        model: RegionType,
-                        as: 'regionType',
-                        where: { labelTr: 'city' },
-                        attributes: ['labelTr']
-                    },
-                    {
-                        model: Branch,
-                        as: 'branches',
-                        where: { falukantUserId: user.id },
-                        include: [{ model: BranchType, as: 'branchType', attributes: ['labelTr'] }],
-                        attributes: ['branchTypeId'],
-                        required: false
-                    }
-                ]
-            }),
             TownProductWorth.findAll({
                 where: { productId: { [Op.in]: productIds } },
                 attributes: ['productId', 'regionId', 'worthPercent']
@@ -4578,12 +4589,7 @@ class FalukantService extends BaseService {
         ]);
 
         const knowledgeByProduct = new Map(knowledges.map(k => [k.productId, k.knowledge || 0]));
-        const worthByProductRegion = new Map();
+        const worthByProductRegion = new Map(townWorths.map(tw => [`${tw.productId}-${tw.regionId}`, tw.worthPercent]));
-        for (const tw of townWorths) {
-            const key = `${tw.productId}-${tw.regionId}`;
-            worthByProductRegion.set(key, tw.worthPercent);
-        }
-        const productById = new Map(products.map(p => [p.id, p]));
 
         const PRICE_TOLERANCE = 0.01;
         const out = {};
@@ -4604,18 +4610,11 @@ class FalukantService extends BaseService {
                 const priceInCity = calcRegionalSellPriceSync(product, knowledgeFactor, worthPercent);
                 if (priceInCity == null) continue;
                 if (priceInCity <= currentRegionalPrice - PRICE_TOLERANCE) continue;
-
-                let branchType = null;
-                if (city.branches && city.branches.length > 0) {
-                    const branchTypes = city.branches.map(b => b.branchType?.labelTr).filter(Boolean);
-                    if (branchTypes.includes('store') || branchTypes.includes('fullstack')) branchType = 'store';
-                    else if (branchTypes.includes('production')) branchType = 'production';
-                }
                 results.push({
                     regionId: city.id,
                     regionName: city.name,
                     price: priceInCity,
-                    branchType
+                    branchType: branchTypeByCityId.get(city.id) ?? null
                 });
             }
             results.sort((a, b) => b.price - a.price);