change institution list

app/service/course/institution.js

@@ -13,7 +13,7 @@ class InstitutionService extends Service {
 
     const { ctx } = this;
     const user_uuid = ctx.userUuid;
-    const { cats, ages, lat, lng, address } = input;
+    const { cats, ages, lat, lng, address, page } = input;
     const where_institutions = input.institutions;
     // 保存定位记录
     if (address && lat && lng) {
@@ -50,9 +50,24 @@ class InstitutionService extends Service {
 
     const institution_area_list = await this.getInstitutionAreaList(institutions);// 将校区表处理成数组
     // const from = { lat, lng };
-    const area_lbs = await this.computeDistance(institution_area_list, { lat, lng });// 计算距离信息
-    const institution_areas = await this.findShortestDistanceAreas(institution_area_list, area_lbs);// 查找最短距离并输出
-    const ret = await this.formatInstitutions(institution_areas);
+    // const area_lbs = await this.computeDistance(institution_area_list, { lat, lng });// 计算距离信息
+    const area_distance = await this.calcDistance(institution_area_list, { lat, lng }, page);
+    const institution_areas = await this.computeDistance(area_distance, { lat, lng });
+    for (const i in institution_areas) {
+      area_distance[i].distance = Number(institution_areas[i].distance) === 0 ? 999999999.0 : parseFloat(institution_areas[i].distance);
+      area_distance[i].duration = institution_areas[i].duration;
+      area_distance[i].travel_method = institution_areas[i].travel_method;
+      area_distance[i].travel_tips = `距我${area_distance[i].distance}km,开车${area_distance[i].duration}分钟`;
+      if (area_distance[i].travel_method === 'walking') {
+        area_distance[i].travel_tips = `距我${area_distance[i].distance}km,步行${area_distance[i].duration}分钟`;
+      }
+      if (Number(institution_areas[i].distance) === 0 && institution_areas[i].duration === 0) {
+        area_distance[i].travel_tips = '暂无法计算出距离';
+      }
+    }
+    // const institution_areas = await this.findShortestDistanceAreas(institution_area_list, area_lbs);// 查找最短距离并输出
+    // const ret = await this.formatInstitutions(institution_areas);
+    const ret = await this.formatInstitutions(area_distance);
 
     return ret;
   }
@@ -385,6 +400,57 @@ class InstitutionService extends Service {
 
   }
 
+  // 先本地用公式计算距离，然后分页，取对应的再去调腾讯接口
+  async calcDistance(lbs_array, from_gps, page = 1) {
+    const { ctx } = this;
+
+    if (!Array.isArray(lbs_array) || lbs_array.length === 0) {
+      return [];
+    }
+
+    const calcHandle = [];
+    for (const v of lbs_array) {
+      calcHandle.push(ctx.service.course.lbs.getDistance(v, from_gps));
+    }
+    const result = await Promise.all(calcHandle).then(result => {
+      return result;
+    }).catch(error => {
+      ctx.failed(error);
+    });
+
+    let ret = [];
+    for (const i in result) {
+      const tmp = lbs_array[i];
+      tmp.distance = result[i];
+      ret.push(tmp);
+    }
+
+    const sort = function(a, b) {
+      return a.distance - b.distance;
+    };
+    ret = R.sort(sort)(ret);
+
+    const institutions = [];
+    for (const v of ret) {
+      if (!institutions[v.id] && !ctx.isEmpty(v)) {
+        institutions[v.id] = v;
+      }
+    }
+
+    const results = [];
+    for (const v of institutions) {
+      if (!ctx.isEmpty(v)) {
+        results.push(v);
+      }
+    }
+
+    if (results.length <= (page - 1) * 10) {
+      return [];
+    }
+    const end = page * 10 > results.length ? results.length : page * 10;
+    return R.slice((page - 1) * 10, end)(results);
+  }
+
   /**
      *
      * @param {*} institution_areas 校区列表
@@ -456,6 +522,9 @@ class InstitutionService extends Service {
       ctx.failed(error);
     });
 
+    const userCollect = await ctx.classModel.CourseUserCollection.findAll({ where: { user_uuid: ctx.userUuid, is_deleted: 0 } });
+    const ids = R.pluck('institution_id', userCollect);
+
     let ret = [];
     for (const i in institutions) {
       const institution = institutions[i];
@@ -497,6 +566,7 @@ class InstitutionService extends Service {
         travel_tips: institution.travel_tips, // TODO
         characteristic: institution.characteristic ? institution.characteristic : '',
         distance: institution.distance,
+        is_collected: ids.includes(institution.id) ? 1 : 0,
       });
     }