package noticerecdmod

import "time"

// 动态类型
type TrendType string

const (
	Fans TrendType = "fans" //粉丝
	Like TrendType = "like" //点赞
	Cmet TrendType = "cmet" //评论
	Itte TrendType = "itte" //互动
)

// UpdateTrendReadTime 更新动态的阅读时间
func UpdateTrendReadTime(trend TrendType, uid uint64, readAt time.Time) error {
	filter := M{
		"uid":        uid,
		"noticeCode": trend,
	}
	noticeRecord := NoticeRecord{}
	if err := coll(nil).FindOne(&noticeRecord, filter); err != nil {
		return err
	}
	if noticeRecord.LastReadAt.After(readAt) {
		return nil
	}
	filter["lastReadAt"] = M{"$lt": readAt}
	update := M{
		"$setOnInsert": M{
			"uid":        uid,
			"noticeCode": trend,
			"createdAt":  time.Now(),
		},
		"$set": M{
			"lastReadAt": readAt,
			"updatedAt":  time.Now(),
		},
	}
	_, err := coll(nil).UpsertOne(filter, update)
	return err
}