feat: add post buy count

backend/app/http/admin/posts.go

@@ -23,7 +23,32 @@ type posts struct{}
 // @Bind query query
 func (ctl *posts) List(ctx fiber.Ctx, pagination *requests.Pagination, query *ListQuery) (*requests.Pager, error) {
 	cond := models.Posts.BuildConditionWithKey(query.Keyword)
-	return models.Posts.List(ctx.Context(), pagination, cond)
+	pager, err := models.Posts.List(ctx.Context(), pagination, cond)
+	if err != nil {
+		return nil, err
+	}
+
+	postIds := lo.Map(pager.Items.([]model.Posts), func(item model.Posts, _ int) int64 {
+		return item.ID
+	})
+	if len(postIds) > 0 {
+		postCntMap, err := models.Posts.BoughtStatistics(ctx.Context(), postIds)
+		if err != nil {
+			return pager, err
+		}
+
+		items := lo.Map(pager.Items.([]model.Posts), func(item model.Posts, _ int) PostItem {
+			cnt := int64(0)
+			if v, ok := postCntMap[item.ID]; ok {
+				cnt = v
+			}
+
+			return PostItem{Posts: &item, BoughtCount: cnt}
+		})
+
+		pager.Items = items
+	}
+	return pager, err
 }
 
 type PostForm struct {
@@ -142,7 +167,8 @@ func (ctl *posts) Delete(ctx fiber.Ctx, id int64) error {
 
 type PostItem struct {
 	*model.Posts
-	Medias []*model.Medias `json:"medias"`
+	Medias      []*model.Medias `json:"medias"`
+	BoughtCount int64           `json:"bought_count"`
 }
 
 // Show posts by id
@@ -165,3 +191,22 @@ func (ctl *posts) Show(ctx fiber.Ctx, id int64) (*PostItem, error) {
 		Medias: medias,
 	}, nil
 }
+
+// SendTo
+// @Router			/v1/admin/posts/:id/send-to/:userId [post]
+// @Bind id path
+// @Bind userId path
+func (ctl *posts) SendTo(ctx fiber.Ctx, id, userId int64) error {
+	if _, err := models.Posts.GetByID(ctx.Context(), id); err != nil {
+		return err
+	}
+
+	if _, err := models.Users.GetByID(ctx.Context(), userId); err != nil {
+		return err
+	}
+
+	if err := models.Posts.SendTo(ctx.Context(), id, userId); err != nil {
+		return err
+	}
+	return nil
+}