cialloo
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85 lines
2.2 KiB
Go
85 lines
2.2 KiB
Go
package logic
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import (
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"context"
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"database/sql"
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"fmt"
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"git.cialloo.com/CiallooWeb/Blog/app/internal/svc"
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"git.cialloo.com/CiallooWeb/Blog/app/internal/types"
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"github.com/zeromicro/go-zero/core/logx"
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)
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type DeletePostLogic struct {
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logx.Logger
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ctx context.Context
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svcCtx *svc.ServiceContext
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}
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// Delete a blog post
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func NewDeletePostLogic(ctx context.Context, svcCtx *svc.ServiceContext) *DeletePostLogic {
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return &DeletePostLogic{
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Logger: logx.WithContext(ctx),
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ctx: ctx,
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svcCtx: svcCtx,
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}
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}
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func (l *DeletePostLogic) DeletePost(req *types.DeletePostReq) (resp *types.DeletePostResp, err error) {
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// Start a transaction
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tx, err := l.svcCtx.DB.BeginTx(l.ctx, nil)
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if err != nil {
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l.Errorf("Failed to begin transaction: %v", err)
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return nil, err
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}
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defer tx.Rollback()
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// Get cover_id before deleting the post
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var coverID sql.NullInt64
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getCoverQuery := `SELECT cover_id FROM posts WHERE id = $1`
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err = tx.QueryRowContext(l.ctx, getCoverQuery, req.PostId).Scan(&coverID)
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if err != nil {
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if err == sql.ErrNoRows {
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l.Errorf("Post not found with id: %s", req.PostId)
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return nil, fmt.Errorf("post not found")
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}
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l.Errorf("Failed to get post: %v", err)
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return nil, err
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}
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// Delete hashtag associations (post_hashtags will be deleted by CASCADE)
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deleteHashtagsQuery := `DELETE FROM post_hashtags WHERE post_id = $1`
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_, err = tx.ExecContext(l.ctx, deleteHashtagsQuery, req.PostId)
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if err != nil {
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l.Errorf("Failed to delete hashtag associations: %v", err)
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return nil, err
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}
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// Delete post from database
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deleteQuery := `DELETE FROM posts WHERE id = $1`
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_, err = tx.ExecContext(l.ctx, deleteQuery, req.PostId)
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if err != nil {
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l.Errorf("Failed to delete post: %v", err)
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return nil, err
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}
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// Delete cover file if exists
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if coverID.Valid {
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deleteFileQuery := `DELETE FROM files WHERE id = $1`
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_, err = tx.ExecContext(l.ctx, deleteFileQuery, coverID.Int64)
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if err != nil {
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l.Errorf("Failed to delete cover file: %v", err)
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// Don't fail the whole operation for this
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}
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}
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// Commit transaction
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if err = tx.Commit(); err != nil {
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l.Errorf("Failed to commit transaction: %v", err)
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return nil, err
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}
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return &types.DeletePostResp{}, nil
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}
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