Blizzard
98 lines
2.7 KiB
Go
98 lines
2.7 KiB
Go
package radio
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import (
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"errors"
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"sundynix-go/global"
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"sundynix-go/model/radio"
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radioReq "sundynix-go/model/radio/request"
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"gorm.io/gorm"
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)
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type CategoryService struct{}
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// GetCategoryList 获取分类列表
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func (s *CategoryService) GetCategoryList(info radioReq.GetCategoryList) ([]radio.RadioCategory, int64, error) {
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db := global.DB.Model(&radio.RadioCategory{})
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var list []radio.RadioCategory
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var total int64
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if info.Name != "" {
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db = db.Where("name LIKE ?", "%"+info.Name+"%")
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}
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if info.Status > 0 {
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db = db.Where("status = ?", info.Status)
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}
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err := db.Count(&total).Error
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if err != nil {
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return nil, 0, err
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}
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offset := (info.Current - 1) * info.PageSize
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err = db.Offset(offset).Limit(info.PageSize).Order("sort ASC").Find(&list).Error
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return list, total, err
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}
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// GetCategoryTree 返回带频道的分类树
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func (s *CategoryService) GetCategoryTree() ([]radio.RadioCategory, error) {
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var res []radio.RadioCategory
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// 1. 查询分类并预加载关联的频道
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// Preload("Channels") 会自动根据 CategoryId 匹配
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// Preload("Icon") 和 Preload("Cover") 用于加载 OSS 信息
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err := global.DB.Model(&radio.RadioCategory{}).
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Preload("Channels", "status = ?", 1). // 只加载启用的频道
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Order("sort desc").
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Find(&res).Error
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return res, err
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}
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func (s *CategoryService) GetAllCategory() ([]radio.RadioCategory, error) {
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var res []radio.RadioCategory
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err := global.DB.Find(&res).Error
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return res, err
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}
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// GetCategoryById 获取分类详情
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func (s *CategoryService) GetCategoryById(id string) (*radio.RadioCategory, error) {
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var category radio.RadioCategory
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err := global.DB.Where("id = ?", id).First(&category).Error
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return &category, err
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}
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// SaveCategory 保存分类
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func (s *CategoryService) SaveCategory(req radioReq.SaveCategory) error {
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category := radio.RadioCategory{
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Name: req.Name,
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Description: req.Description,
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Sort: req.Sort,
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Status: req.Status,
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}
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return global.DB.Create(&category).Error
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}
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// UpdateCategory 更新分类
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func (s *CategoryService) UpdateCategory(req radioReq.UpdateCategory) error {
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updates := map[string]interface{}{
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"name": req.Name,
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"description": req.Description,
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"sort": req.Sort,
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"status": req.Status,
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}
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return global.DB.Model(&radio.RadioCategory{}).Where("id = ?", req.Id).Updates(updates).Error
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}
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// DeleteCategory 删除分类
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func (s *CategoryService) DeleteCategory(id string) error {
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return global.DB.Transaction(func(tx *gorm.DB) error {
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// 检查是否有频道使用此分类
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var count int64
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tx.Model(&radio.RadioChannel{}).Where("category_id = ?", id).Count(&count)
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if count > 0 {
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return errors.New("该分类下存在频道，无法删除")
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}
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return tx.Where("id = ?", id).Delete(&radio.RadioCategory{}).Error
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})
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}
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