139 lines
2.8 KiB
Go
139 lines
2.8 KiB
Go
package repository
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import (
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"context"
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"database/sql"
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"errors"
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"fmt"
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"tailly_back_v2/internal/domain"
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)
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var (
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ErrPostNotFound = errors.New("post not found")
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)
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type PostRepository interface {
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Create(ctx context.Context, post *domain.Post) error
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GetByID(ctx context.Context, id int) (*domain.Post, error)
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GetAll(ctx context.Context) ([]*domain.Post, error)
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GetByAuthorID(ctx context.Context, authorID int) ([]*domain.Post, error)
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Update(ctx context.Context, post *domain.Post) error
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Delete(ctx context.Context, id int) error
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}
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type postRepository struct {
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db *sql.DB
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}
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func (r *postRepository) GetByAuthorID(ctx context.Context, authorID int) ([]*domain.Post, error) {
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//TODO implement me
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panic("implement me")
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}
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func (r *postRepository) Update(ctx context.Context, post *domain.Post) error {
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//TODO implement me
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panic("implement me")
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}
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func (r *postRepository) Delete(ctx context.Context, id int) error {
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query := `
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DELETE FROM posts
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WHERE id = $1
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`
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result, err := r.db.ExecContext(ctx, query, id)
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if err != nil {
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return fmt.Errorf("failed to delete post: %w", err)
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}
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rowsAffected, err := result.RowsAffected()
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if err != nil {
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return fmt.Errorf("failed to get rows affected: %w", err)
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}
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if rowsAffected == 0 {
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return ErrPostNotFound
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}
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return nil
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}
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func NewPostRepository(db *sql.DB) *postRepository {
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return &postRepository{db: db}
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}
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func (r *postRepository) Create(ctx context.Context, post *domain.Post) error {
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query := `
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INSERT INTO posts (title, content, author_id, created_at, updated_at)
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VALUES ($1, $2, $3, $4, $5)
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RETURNING id
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`
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err := r.db.QueryRowContext(ctx, query,
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post.Title,
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post.Content,
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post.AuthorID,
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post.CreatedAt,
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post.UpdatedAt,
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).Scan(&post.ID)
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return err
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}
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func (r *postRepository) GetByID(ctx context.Context, id int) (*domain.Post, error) {
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query := `
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SELECT id, title, content, author_id, created_at, updated_at
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FROM posts
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WHERE id = $1
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`
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post := &domain.Post{}
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err := r.db.QueryRowContext(ctx, query, id).Scan(
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&post.ID,
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&post.Title,
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&post.Content,
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&post.AuthorID,
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&post.CreatedAt,
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&post.UpdatedAt,
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)
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if err == sql.ErrNoRows {
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return nil, ErrPostNotFound
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}
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return post, err
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}
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func (r *postRepository) GetAll(ctx context.Context) ([]*domain.Post, error) {
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query := `
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SELECT id, title, content, author_id, created_at, updated_at
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FROM posts
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ORDER BY created_at DESC
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`
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rows, err := r.db.QueryContext(ctx, query)
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if err != nil {
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return nil, err
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}
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defer rows.Close()
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var posts []*domain.Post
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for rows.Next() {
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post := &domain.Post{}
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err := rows.Scan(
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&post.ID,
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&post.Title,
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&post.Content,
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&post.AuthorID,
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&post.CreatedAt,
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&post.UpdatedAt,
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)
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if err != nil {
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return nil, err
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}
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posts = append(posts, post)
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}
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return posts, nil
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}
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