recommender/internal/service/user/posts.go

package user

import (
	"context"
	"leafdev.top/Ecosystem/recommender/internal/entity"
	"leafdev.top/Ecosystem/recommender/internal/schema"
	"time"
)

const TaskProcessing = "user_likes"

var LockTTL = time.Minute * 10

func (s *Service) HasLiked(c context.Context, externalUserEntity *entity.ExternalUser, applicationEntity *entity.Application, postEntity *entity.Post) (bool, error) {
	count, err := s.dao.WithContext(c).UserLike.Where(s.dao.UserLike.ExternalUserId.Eq(externalUserEntity.Id.Uint())).
		Where(s.dao.UserLike.PostId.Eq(postEntity.Id.Uint())).
		Where(s.dao.UserLike.ApplicationId.Eq(applicationEntity.Id.Uint())).Count()

	if err != nil {
		return false, err
	}

	return count > 0, nil
}

func (s *Service) UpdateLike(c context.Context, externalUserEntity *entity.ExternalUser, applicationEntity *entity.Application, postEntity *entity.Post, likeType schema.UserLikeType) error {
	count, err := s.dao.WithContext(c).UserLike.Where(s.dao.UserLike.ExternalUserId.Eq(externalUserEntity.Id.Uint())).
		Where(s.dao.UserLike.PostId.Eq(postEntity.Id.Uint())).
		Where(s.dao.UserLike.ApplicationId.Eq(applicationEntity.Id.Uint())).Count()

	if err != nil {
		return err
	}

	if count > 0 {
		//	update
		_, err = s.dao.WithContext(c).UserLike.Where(s.dao.UserLike.ExternalUserId.Eq(externalUserEntity.Id.Uint())).
			Where(s.dao.UserLike.PostId.Eq(postEntity.Id.Uint())).
			Where(s.dao.UserLike.ApplicationId.Eq(applicationEntity.Id.Uint())).
			Update(s.dao.UserLike.Type, likeType)
		return err
	}

	var userLike = &entity.UserLike{
		ApplicationId:  applicationEntity.Id,
		ExternalUserId: externalUserEntity.Id,
		PostId:         postEntity.Id,
		Type:           likeType,
	}

	err = s.dao.WithContext(c).UserLike.Create(userLike)

	return err
}

func (s *Service) LikePost(c context.Context, externalUserEntity *entity.ExternalUser, applicationEntity *entity.Application, postEntity *entity.Post) error {
	//// 检测是否有
	//var cacheKey = s.redis.Prefix(TaskProcessing)
	//lock, err := s.redis.Locker.Obtain(c, cacheKey, LockTTL, nil)
	//if err != nil {
	//	return err
	//}

	//defer func(lock *redislock.Lock, ctx context.Context) {
	//	err := lock.Release(ctx)
	//	if err != nil {
	//		s.logger.Sugar.Error(err)
	//	}
	//}(lock, c)

	// get tags
	postTags, err := s.postService.GetPostTags(c, postEntity)
	if err != nil {
		return err
	}

	hasLike, err := s.HasLiked(c, externalUserEntity, applicationEntity, postEntity)
	if err != nil {
		return err
	}

	if hasLike {
		return nil
	}

	err = s.UpdateLike(c, externalUserEntity, applicationEntity, postEntity, schema.UserLikeTypeLike)
	if err != nil {
		return err
	}

	err = s.BindTags(context.Background(), externalUserEntity, applicationEntity, postTags)
	if err != nil {
		s.logger.Sugar.Error(err)
	}

	return nil
}

func (s *Service) DislikePost(c context.Context, externalUserEntity *entity.ExternalUser, applicationEntity *entity.Application, postEntity *entity.Post) error {
	// 检测是否有
	//var cacheKey = s.redis.Prefix(TaskProcessing)
	//lock, err := s.redis.Locker.Obtain(c, cacheKey, LockTTL, nil)
	//if err != nil {
	//	return err
	//}
	//
	//defer func(lock *redislock.Lock, ctx context.Context) {
	//	err := lock.Release(ctx)
	//	if err != nil {
	//		s.logger.Sugar.Error(err)
	//	}
	//}(lock, c)

	// get tags
	postTags, err := s.postService.GetPostTags(c, postEntity)
	if err != nil {
		return err
	}

	hasLike, err := s.HasLiked(c, externalUserEntity, applicationEntity, postEntity)
	if err != nil {
		return err
	}

	if !hasLike {
		return nil
	}

	err = s.UpdateLike(c, externalUserEntity, applicationEntity, postEntity, schema.UserLikeTypeDislike)
	if err != nil {
		return err
	}

	_, err = s.dao.WithContext(c).UserLike.Where(s.dao.UserLike.ExternalUserId.Eq(externalUserEntity.Id.Uint())).
		Where(s.dao.UserLike.PostId.Eq(postEntity.Id.Uint())).
		Where(s.dao.UserLike.ApplicationId.Eq(applicationEntity.Id.Uint())).Count()

	if err != nil {
		return err
	}

	err = s.RemoveTags(context.Background(), externalUserEntity, applicationEntity, postTags)
	if err != nil {
		s.logger.Sugar.Error(err)
	}

	return nil
}