80 lines
2.4 KiB
Go
80 lines
2.4 KiB
Go
package redisdao
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import (
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"context"
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"fmt"
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"time"
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"git.lzcwy.cn/zhengchiliu/zt-closet-backend/global"
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"git.lzcwy.cn/zhengchiliu/zt-closet-backend/internal/redismodel"
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"github.com/redis/go-redis/v9"
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)
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// collectSetTTL 收藏集合 key 的过期时间，避免长期驻留导致与 MySQL 弱一致漂移。
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const collectSetTTL = 7 * 24 * time.Hour
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// CollectAdd 用户收藏（collect_type + target_id 分桶，成员为 user_id）
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func CollectAdd(ctx context.Context, collectType int8, targetID, userID int64) error {
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ctx, span := global.Tracer.Start(ctx, "redisdao.CollectAdd")
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defer span.End()
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key := fmt.Sprintf(redismodel.KeyCollectSet, collectType, targetID)
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if err := global.RedisEngine.SAdd(ctx, key, userID).Err(); err != nil {
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span.RecordError(err)
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return err
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}
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// 设置 TTL（best-effort）。
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_ = global.RedisEngine.Expire(ctx, key, collectSetTTL).Err()
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return nil
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}
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// CollectRemove 用户取消收藏
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func CollectRemove(ctx context.Context, collectType int8, targetID, userID int64) error {
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ctx, span := global.Tracer.Start(ctx, "redisdao.CollectRemove")
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defer span.End()
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key := fmt.Sprintf(redismodel.KeyCollectSet, collectType, targetID)
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if err := global.RedisEngine.SRem(ctx, key, userID).Err(); err != nil {
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span.RecordError(err)
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return err
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}
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return nil
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}
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// CollectIsMember 判断用户是否已收藏；集合 key 不存在（缓存过期/冷启动）时返回 redis.Nil，
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// 由调用方回落 MySQL 以区分「未命中」与「确实未收藏」。
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func CollectIsMember(ctx context.Context, collectType int8, targetID, userID int64) (bool, error) {
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ctx, span := global.Tracer.Start(ctx, "redisdao.CollectIsMember")
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defer span.End()
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key := fmt.Sprintf(redismodel.KeyCollectSet, collectType, targetID)
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exists, err := global.RedisEngine.Exists(ctx, key).Result()
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if err != nil {
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span.RecordError(err)
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return false, err
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}
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if exists == 0 {
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return false, redis.Nil
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}
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ok, err := global.RedisEngine.SIsMember(ctx, key, userID).Result()
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if err != nil {
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span.RecordError(err)
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return false, err
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}
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return ok, nil
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}
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// CollectCount 获取收藏总数
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func CollectCount(ctx context.Context, collectType int8, targetID int64) (int64, error) {
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ctx, span := global.Tracer.Start(ctx, "redisdao.CollectCount")
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defer span.End()
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key := fmt.Sprintf(redismodel.KeyCollectSet, collectType, targetID)
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cnt, err := global.RedisEngine.SCard(ctx, key).Result()
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if err != nil {
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span.RecordError(err)
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return 0, err
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}
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return cnt, nil
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}
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