feat(video): add like/unlike/isliked/getlikescount APIs for videos

internal/video/like_repo.go

@@ -0,0 +1,47 @@
+package video
+
+import (
+	"context"
+
+	"gorm.io/gorm"
+)
+
+type LikeRepository struct {
+	db *gorm.DB
+}
+
+func NewLikeRepository(db *gorm.DB) *LikeRepository {
+	return &LikeRepository{db: db}
+}
+
+func (r *LikeRepository) Like(ctx context.Context, like *Like) error {
+	return r.db.WithContext(ctx).Create(like).Error
+}
+
+func (r *LikeRepository) Unlike(ctx context.Context, like *Like) error {
+	return r.db.WithContext(ctx).
+		Where("video_id = ? AND account_id = ?", like.VideoID, like.AccountID).
+		Delete(&Like{}).Error
+}
+
+func (r *LikeRepository) IsLiked(ctx context.Context, videoID, accountID uint) (bool, error) {
+	var count int64
+	err := r.db.WithContext(ctx).Model(&Like{}).
+		Where("video_id = ? AND account_id = ?", videoID, accountID).
+		Count(&count).Error
+	if err != nil {
+		return false, err
+	}
+	return count > 0, nil
+}
+
+func (r *LikeRepository) GetLikesCount(ctx context.Context, videoID uint) (int64, error) {
+	var count int64
+	err := r.db.WithContext(ctx).Model(&Like{}).
+		Where("video_id = ?", videoID).
+		Count(&count).Error
+	if err != nil {
+		return 0, err
+	}
+	return count, nil
+}