feat(merc): 添加促销活动接口

src/main/java/com/xynet/marketing/controller/merc/PromotionController.java

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+package com.xynet.marketing.controller.merc;
+
+import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
+import com.xynet.marketing.service.PromotionService;
+import com.xynet.marketing.utils.MercAuthUtils;
+import com.xynet.marketing.utils.R;
+import com.xynet.marketing.utils.collections.map.JHashMap;
+import com.xynet.marketing.utils.collections.map.JMap;
+import com.xynet.marketing.utils.redis.utils.RedisService;
+import lombok.AllArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.Map;
+
+/**
+ * @author hechunping
+ * @date 2025/2/12
+ */
+@RestController
+@RequestMapping("merc/promotion")
+@AllArgsConstructor
+@Slf4j
+public class PromotionController {
+
+    private PromotionService promotionService;
+    private RedisService redisService;
+
+    @PostMapping("page")
+    private R page(@RequestBody Map<String, Object> param, @RequestHeader Map<String, String> headers) {
+        //获取token
+        String token = headers.get("token");
+        String providerId = headers.get("provider_id");
+        Integer mercId = MercAuthUtils.getMercId(token, providerId);
+        JMap<String, Object> jParam = new JHashMap<>(param);
+        jParam.put("mercId", mercId);
+        Page<Map<String, Object>> data = promotionService.page(jParam);
+        return R.ok(data);
+    }
+
+}