init: radio init commit

service/radio/channel_service.go

@@ -0,0 +1,127 @@
+package radio
+
+import (
+	"errors"
+
+	"sundynix-go/global"
+	"sundynix-go/model/radio"
+	radioReq "sundynix-go/model/radio/request"
+
+	"gorm.io/gorm"
+)
+
+type ChannelService struct{}
+
+// GetChannelList 获取频道列表
+func (s *ChannelService) GetChannelList(userId string, info radioReq.GetChannelList) ([]radio.RadioChannel, int64, error) {
+	db := global.DB.Model(&radio.RadioChannel{})
+	var list []radio.RadioChannel
+	var total int64
+
+	if info.CategoryId != "" {
+		db = db.Where("category_id = ?", info.CategoryId)
+	}
+	if info.Name != "" {
+		db = db.Where("name LIKE ?", "%"+info.Name+"%")
+	}
+	if info.Status > 0 {
+		db = db.Where("status = ?", info.Status)
+	}
+
+	err := db.Count(&total).Error
+	if err != nil {
+		return nil, 0, err
+	}
+
+	offset := (info.Current - 1) * info.PageSize
+	err = db.Offset(offset).Limit(info.PageSize).Order("sort ASC").Find(&list).Error
+	if err != nil {
+		return nil, 0, err
+	}
+
+	// 批量查询用户订阅的频道，避免N+1问题
+	if userId != "" {
+		subService := &SubscriptionService{}
+		subscribedChannelIds, _ := subService.GetUserSubscriptionHistory(userId)
+		// 转换为map以便快速查找
+		subscribedMap := make(map[string]bool)
+		for _, cid := range subscribedChannelIds {
+			subscribedMap[cid] = true
+		}
+		// 填充HasSubscribed字段
+		for i := range list {
+			if subscribedMap[list[i].Id] {
+				list[i].HasSubscribed = 1
+			} else {
+				list[i].HasSubscribed = 0
+			}
+		}
+	}
+
+	return list, total, nil
+}
+
+// GetChannelById 获取频道详情
+func (s *ChannelService) GetChannelById(userId, id string) (radio.RadioChannel, error) {
+	var channel radio.RadioChannel
+	err := global.DB.Where("id = ?", id).Preload("Cover").First(&channel).Error
+	if err != nil {
+		return channel, err
+	}
+
+	// 填充HasSubscribed字段
+	if userId != "" {
+		subService := &SubscriptionService{}
+		hasSub, _ := subService.HasSubscription(userId, channel.Id)
+		if hasSub {
+			channel.HasSubscribed = 1
+		} else {
+			channel.HasSubscribed = 0
+		}
+	}
+
+	return channel, nil
+}
+
+// SaveChannel 保存频道
+func (s *ChannelService) SaveChannel(req radioReq.SaveChannel) error {
+	channel := radio.RadioChannel{
+		CategoryId:  req.CategoryId,
+		Name:        req.Name,
+		Description: req.Description,
+		CoverId:     req.CoverId,
+		Tags:        req.Tags,
+		IsVipOnly:   req.IsVipOnly,
+		Sort:        req.Sort,
+		Status:      req.Status,
+	}
+	return global.DB.Create(&channel).Error
+}
+
+// UpdateChannel 更新频道
+func (s *ChannelService) UpdateChannel(req radioReq.UpdateChannel) error {
+	updates := map[string]interface{}{
+		"category_id": req.CategoryId,
+		"name":        req.Name,
+		"description": req.Description,
+		"cover_id":    req.CoverId,
+		"tags":        req.Tags,
+		"is_vip_only": req.IsVipOnly,
+		"sort":        req.Sort,
+		"status":      req.Status,
+	}
+	return global.DB.Model(&radio.RadioChannel{}).Where("id = ?", req.Id).Updates(updates).Error
+}
+
+// DeleteChannel 删除频道
+func (s *ChannelService) DeleteChannel(id string) error {
+	return global.DB.Transaction(func(tx *gorm.DB) error {
+		// 检查是否有节目使用此频道
+		var count int64
+		tx.Model(&radio.RadioProgram{}).Where("channel_id = ?", id).Count(&count)
+		if count > 0 {
+			return errors.New("该频道下存在节目，无法删除")
+		}
+		return tx.Where("id = ?", id).Delete(&radio.RadioChannel{}).Error
+	})
+}