feat(nutrition): 新增营养产品推荐Controller

cfc-backend/src/main/java/com/etotem/cfc/controller/nutrition/NutritionProductController.java

@@ -0,0 +1,81 @@
+package com.etotem.cfc.controller.nutrition;
+
+import com.etotem.cfc.common.Result;
+import com.etotem.cfc.dto.NutritionRecommendDTO;
+import com.etotem.cfc.entity.NutritionCategory;
+import com.etotem.cfc.entity.NutritionPlatformListing;
+import com.etotem.cfc.entity.NutritionProduct;
+import com.etotem.cfc.service.NutritionProductService;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import javax.annotation.Resource;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * 营养产品（益生菌/益生元/营养素）推荐接口
+ * 提供分类/品牌/产品搜索/详情/推荐/比价
+ */
+@Tag(name = "营养产品推荐")
+@Slf4j
+@RestController
+@RequestMapping("/api/nutrition/product")
+public class NutritionProductController {
+
+    @Resource
+    private NutritionProductService nutritionProductService;
+
+    @Operation(summary = "分类列表")
+    @PostMapping("/category/list")
+    public Result<List<NutritionCategory>> listCategories() {
+        return Result.success(nutritionProductService.listCategories());
+    }
+
+    @Operation(summary = "品牌列表（含产品数）")
+    @PostMapping("/brand/list")
+    public Result<List<Map<String, Object>>> listBrands() {
+        return Result.success(nutritionProductService.listBrands());
+    }
+
+    @Operation(summary = "产品搜索")
+    @PostMapping("/search")
+    public Result<List<NutritionProduct>> search(@RequestBody NutritionRecommendDTO.SearchQuery query) {
+        return Result.success(nutritionProductService.search(query));
+    }
+
+    @Operation(summary = "产品详情")
+    @PostMapping("/detail")
+    public Result<Map<String, Object>> detail(@RequestBody Map<String, Long> params) {
+        Long productId = params.get("productId");
+        if (productId == null) {
+            return Result.error("productId 不能为空");
+        }
+        Map<String, Object> detail = nutritionProductService.detail(productId);
+        if (detail == null) {
+            return Result.error("产品不存在");
+        }
+        return Result.success(detail);
+    }
+
+    @Operation(summary = "产品推荐")
+    @PostMapping("/recommend")
+    public Result<List<Map<String, Object>>> recommend(@RequestBody NutritionRecommendDTO.RecommendQuery query) {
+        return Result.success(nutritionProductService.recommend(query));
+    }
+
+    @Operation(summary = "平台比价")
+    @PostMapping("/price-compare")
+    public Result<List<NutritionPlatformListing>> priceCompare(@RequestBody Map<String, Long> params) {
+        Long productId = params.get("productId");
+        if (productId == null) {
+            return Result.error("productId 不能为空");
+        }
+        return Result.success(nutritionProductService.priceCompare(productId));
+    }
+}