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like_comment.go
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/
like_comment.go
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package hotrank
import (
"context"
"github.com/go-redis/redis/v8"
"log"
"strconv"
)
// 作品的一级操作 不计入热度 仅记录操作
// 作品redis前缀
var workRedisPrefix = map[string]string{
"like": "s:like:",
"comment": "s:comment:",
}
// GenLikeRedisKey 生成动态点赞key
func GenLikeRedisKey(mid string) string {
return workRedisPrefix["like"] + mid
}
// GenCommentRedisKey 评论计数key
func GenCommentRedisKey(mid string) string {
return workRedisPrefix["comment"] + mid
}
// RunCommentRedisChange 评论计数变更
func (c *WorkCall) RunCommentRedisChange(ctx context.Context, mid string, add bool, count int64) error {
rKey := GenCommentRedisKey(mid)
var err error
if add {
err = c.Rdb.IncrBy(ctx, rKey, count).Err()
} else {
err = c.Rdb.DecrBy(ctx, rKey, count).Err()
}
if err != nil {
log.Printf("[comment] 新增评论计数失败 错误:%v", err)
return err
}
return nil
}
// GetCommentCount 获取评论计数
func (c *WorkCall) GetCommentCount(ctx context.Context, mid string) uint64 {
rKey := GenCommentRedisKey(mid)
val, err := c.Rdb.Get(ctx, rKey).Result()
if err != nil {
if err != redis.Nil {
log.Printf("[redis][comment] 获取评论失败 错误:%v", err)
}
return 0
}
if len(val) > 0 {
count, err := strconv.ParseUint(val, 10, 64)
if err != nil {
log.Printf("[redis][comment] %s获取评论数量失败 错误:%v", mid, err)
}
return count
}
return 0
}
// ChangeLike 点赞变更
// 考虑是否变更为bitmap方式
func (c *WorkCall) ChangeLike(ctx context.Context, mid string, userId string, add bool) error {
rKey := GenLikeRedisKey(mid)
has := c.Rdb.SIsMember(ctx, rKey, userId).Val()
if add {
if has {
return LikeExists
}
err := c.Rdb.SAdd(ctx, rKey, userId).Err()
if err != nil {
return err
}
} else {
if has {
err := c.Rdb.SRem(ctx, rKey, userId).Err()
if err != nil {
return err
}
} else {
return LikeNotExists
}
}
return nil
}
// HasLike 获取是否点赞
func (c *WorkCall) HasLike(ctx context.Context, mid string, userId string) bool {
rKey := GenLikeRedisKey(mid)
has := c.Rdb.SIsMember(ctx, rKey, userId).Val()
return has
}