feat(purchase): 생산소모품 구매 관리 시스템 구현

tkuser: 업체(공급업체) CRUD + 소모품 마스터 CRUD (사진 업로드 포함)
tkfb: 구매신청 → 구매 처리 → 월간 분석/정산 전체 워크플로
설비(equipment) 분류 구매 시 자동 등록 + 실패 시 admin 알림

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

system1-factory/api/controllers/purchaseController.js

@@ -0,0 +1,104 @@
+const PurchaseModel = require('../models/purchaseModel');
+const PurchaseRequestModel = require('../models/purchaseRequestModel');
+const logger = require('../utils/logger');
+
+const PurchaseController = {
+  // 구매 처리 (신청 → 구매)
+  create: async (req, res) => {
+    try {
+      const { request_id, item_id, vendor_id, quantity, unit_price, purchase_date, update_base_price, notes } = req.body;
+
+      if (!item_id) return res.status(400).json({ success: false, message: '소모품을 선택해주세요.' });
+      if (!unit_price) return res.status(400).json({ success: false, message: '구매 단가를 입력해주세요.' });
+      if (!purchase_date) return res.status(400).json({ success: false, message: '구매일을 입력해주세요.' });
+
+      // 구매 내역 생성
+      const purchaseId = await PurchaseModel.createFromRequest({
+        request_id: request_id || null,
+        item_id,
+        vendor_id: vendor_id || null,
+        quantity: quantity || 1,
+        unit_price,
+        purchase_date,
+        purchaser_id: req.user.id,
+        notes
+      });
+
+      // 기준가 업데이트 요청 시
+      if (update_base_price) {
+        const items = await PurchaseModel.getConsumableItems(false);
+        const item = items.find(i => i.item_id === parseInt(item_id));
+        if (item) {
+          await PurchaseModel.updateBasePrice(item_id, unit_price, item.base_price, req.user.id);
+        }
+      }
+
+      // 설비 자동 등록 (category='equipment')
+      let equipmentResult = null;
+      if (request_id) {
+        const requestData = await PurchaseRequestModel.getById(request_id);
+        if (requestData && requestData.category === 'equipment') {
+          equipmentResult = await PurchaseModel.tryAutoRegisterEquipment({
+            item_name: requestData.item_name,
+            maker: requestData.maker,
+            vendor_name: null,
+            unit_price,
+            purchase_date,
+            purchase_id: purchaseId,
+            purchaser_id: req.user.id
+          });
+        }
+      } else {
+        // 직접 구매 시에도 category 확인
+        const items = await PurchaseModel.getConsumableItems(false);
+        const item = items.find(i => i.item_id === parseInt(item_id));
+        if (item && item.category === 'equipment') {
+          const vendors = await PurchaseModel.getVendors();
+          const vendor = vendors.find(v => v.vendor_id === parseInt(vendor_id));
+          equipmentResult = await PurchaseModel.tryAutoRegisterEquipment({
+            item_name: item.item_name,
+            maker: item.maker,
+            vendor_name: vendor ? vendor.vendor_name : null,
+            unit_price,
+            purchase_date,
+            purchase_id: purchaseId,
+            purchaser_id: req.user.id
+          });
+        }
+      }
+
+      const result = { purchase_id: purchaseId };
+      if (equipmentResult) result.equipment = equipmentResult;
+
+      res.status(201).json({ success: true, data: result, message: '구매 처리가 완료되었습니다.' });
+    } catch (err) {
+      logger.error('Purchase create error:', err);
+      res.status(500).json({ success: false, message: '서버 오류가 발생했습니다.' });
+    }
+  },
+
+  // 구매 내역 목록
+  getAll: async (req, res) => {
+    try {
+      const { vendor_id, category, from_date, to_date, year_month } = req.query;
+      const rows = await PurchaseModel.getAll({ vendor_id, category, from_date, to_date, year_month });
+      res.json({ success: true, data: rows });
+    } catch (err) {
+      logger.error('Purchase getAll error:', err);
+      res.status(500).json({ success: false, message: '서버 오류가 발생했습니다.' });
+    }
+  },
+
+  // 가격 변동 이력
+  getPriceHistory: async (req, res) => {
+    try {
+      const rows = await PurchaseModel.getPriceHistory(req.params.itemId);
+      res.json({ success: true, data: rows });
+    } catch (err) {
+      logger.error('PriceHistory get error:', err);
+      res.status(500).json({ success: false, message: '서버 오류가 발생했습니다.' });
+    }
+  }
+};
+
+module.exports = PurchaseController;