feat(product): 添加产品配料库存信息展示功能

- 将batchQueryMaterialInventory方法从私有改为公共以支持外部调用
- 在产品-配料关联服务中新增重复绑定校验逻辑
- 实现产品详情页面显示配料的在途、计划和已入库数量信息
- 扩展MatProductWithMaterialsVo数据传输对象增加库存相关字段
- 在产品服务中集成物料库存批量查询并填充到响应结果中

gear-mat/src/main/java/com/gear/mat/domain/vo/MatProductWithMaterialsVo.java

@@ -77,5 +77,8 @@ public class MatProductWithMaterialsVo {
         private BigDecimal materialNum; // 单产品所需配料数量
         private Long sort; // 配料排序
         private String remark;
+        private BigDecimal inTransitNum; // 在途数量（未完成入库的采购数量）
+        private BigDecimal planNum; // 计划采购总数量
+        private BigDecimal receivedNum; // 已入库数量
     }
 }

gear-mat/src/main/java/com/gear/mat/service/impl/MatMaterialServiceImpl.java

@@ -189,7 +189,7 @@ public class MatMaterialServiceImpl implements IMatMaterialService {
      * 批量查询物料库存信息
      * 避免N+1查询问题
      */
-    private Map<Long, MaterialInventoryVo> batchQueryMaterialInventory(List<Long> materialIds) {
+    public Map<Long, MaterialInventoryVo> batchQueryMaterialInventory(List<Long> materialIds) {
         if (materialIds == null || materialIds.isEmpty()) {
             return Collections.emptyMap();
         }

gear-mat/src/main/java/com/gear/mat/service/impl/MatProductMaterialRelationServiceImpl.java

@@ -73,6 +73,9 @@ public class MatProductMaterialRelationServiceImpl implements IMatProductMateria
      */
     @Override
     public Boolean insertByBo(MatProductMaterialRelationBo bo) {
+        // 校验是否已存在相同的绑定关系
+        validBindingExists(bo);
+
         MatProductMaterialRelation add = BeanUtil.toBean(bo, MatProductMaterialRelation.class);
         validEntityBeforeSave(add);
         boolean flag = baseMapper.insert(add) > 0;
@@ -82,6 +85,26 @@ public class MatProductMaterialRelationServiceImpl implements IMatProductMateria
         return flag;
     }
 
+    /**
+     * 校验绑定关系是否存在
+     */
+    private void validBindingExists(MatProductMaterialRelationBo bo) {
+        if (bo.getProductId() == null || bo.getMaterialId() == null) {
+            throw new RuntimeException("产品ID和物料ID不能为空");
+        }
+
+        // 查询是否已存在相同的绑定关系
+        LambdaQueryWrapper<MatProductMaterialRelation> lqw = Wrappers.lambdaQuery();
+        lqw.eq(MatProductMaterialRelation::getProductId, bo.getProductId())
+            .eq(MatProductMaterialRelation::getMaterialId, bo.getMaterialId())
+            .eq(MatProductMaterialRelation::getDelFlag, 0); // 只查询未删除的记录
+
+        MatProductMaterialRelation existing = baseMapper.selectOne(lqw);
+        if (existing != null) {
+            throw new RuntimeException("该产品已绑定此配料，不能重复绑定");
+        }
+    }
+
     /**
      * 修改产品-配料关联中间
      */

gear-mat/src/main/java/com/gear/mat/service/impl/MatProductServiceImpl.java

@@ -13,6 +13,7 @@ import org.springframework.stereotype.Service;
 import com.gear.mat.domain.bo.MatProductBo;
 import com.gear.mat.domain.vo.MatProductVo;
 import com.gear.mat.domain.vo.MatProductWithMaterialsVo;
+import com.gear.mat.domain.vo.MaterialInventoryVo;
 import com.gear.mat.domain.MatProduct;
 import com.gear.mat.mapper.MatProductMapper;
 import com.gear.mat.service.IMatProductService;
@@ -40,6 +41,7 @@ public class MatProductServiceImpl implements IMatProductService {
     private final MatProductMapper baseMapper;
     private final IMatMaterialService matMaterialService;
     private final IMatProductMaterialRelationService productMaterialRelationService;
+    private final MatMaterialServiceImpl matMaterialServiceImpl;
 
     /**
      * 查询产品基础信息
@@ -137,6 +139,25 @@ public class MatProductServiceImpl implements IMatProductService {
             }
         }
 
+        // 批量查询所有物料的库存信息
+        if (!materials.isEmpty()) {
+            List<Long> materialIds = materials.stream()
+                .map(MatProductWithMaterialsVo.MaterialInfo::getMaterialId)
+                .distinct()
+                .collect(Collectors.toList());
+            Map<Long, MaterialInventoryVo> inventoryMap = matMaterialServiceImpl.batchQueryMaterialInventory(materialIds);
+
+            // 填充库存信息到MaterialInfo
+            materials.forEach(material -> {
+                MaterialInventoryVo inventory = inventoryMap.get(material.getMaterialId());
+                if (inventory != null) {
+                    material.setInTransitNum(inventory.getInTransitNum());
+                    material.setPlanNum(inventory.getPlanNum());
+                    material.setReceivedNum(inventory.getReceivedNum());
+                }
+            });
+        }
+
         productWithMaterialsVo.setMaterials(materials);
 
         return productWithMaterialsVo;