Blizzard
40 lines
1.3 KiB
Go
40 lines
1.3 KiB
Go
package logic
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import (
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"context"
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"errors"
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"github.com/zeromicro/go-zero/core/logx"
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"gorm.io/gorm"
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plantModel "sundynix-micro-go/app/plant/model"
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"sundynix-micro-go/app/plant/rpc/internal/svc"
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"sundynix-micro-go/app/plant/rpc/plant"
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)
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type StarPostLogic struct {
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ctx context.Context
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svcCtx *svc.ServiceContext
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logx.Logger
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}
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func NewStarPostLogic(ctx context.Context, svcCtx *svc.ServiceContext) *StarPostLogic {
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return &StarPostLogic{ctx: ctx, svcCtx: svcCtx, Logger: logx.WithContext(ctx)}
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}
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func (l *StarPostLogic) StarPost(in *plant.LikePostReq) (*plant.CommonResp, error) {
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var existing plantModel.UserStar
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err := l.svcCtx.DB.Where("user_id = ? AND target_id = ? AND type = ?", in.UserId, in.PostId, "post").First(&existing).Error
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if errors.Is(err, gorm.ErrRecordNotFound) {
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// 新增收藏
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star := plantModel.UserStar{UserID: in.UserId, TargetID: in.PostId, Type: "post"}
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if err2 := l.svcCtx.DB.Create(&star).Error; err2 != nil {
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return nil, err2
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}
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l.svcCtx.DB.Model(&plantModel.Post{}).Where("id = ?", in.PostId).UpdateColumn("star_count", gorm.Expr("star_count + 1"))
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} else {
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// 取消收藏
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l.svcCtx.DB.Delete(&existing)
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l.svcCtx.DB.Model(&plantModel.Post{}).Where("id = ?", in.PostId).UpdateColumn("star_count", gorm.Expr("GREATEST(star_count - 1, 0)"))
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}
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return &plant.CommonResp{Code: 0, Msg: "ok"}, nil
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}
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