tercul-backend/internal/repositories/edition_repository.go

package repositories

import (
	"context"
	"errors"
	"gorm.io/gorm"
	"tercul/internal/models"
)

// EditionRepository defines CRUD methods specific to Edition.
type EditionRepository interface {
	BaseRepository[models.Edition]
	ListByBookID(ctx context.Context, bookID uint) ([]models.Edition, error)
	FindByISBN(ctx context.Context, isbn string) (*models.Edition, error)
}

type editionRepository struct {
	BaseRepository[models.Edition]
	db *gorm.DB
}

// NewEditionRepository creates a new EditionRepository.
func NewEditionRepository(db *gorm.DB) EditionRepository {
	return &editionRepository{
		BaseRepository: NewBaseRepositoryImpl[models.Edition](db),
		db:             db,
	}
}

// ListByBookID finds editions by book ID
func (r *editionRepository) ListByBookID(ctx context.Context, bookID uint) ([]models.Edition, error) {
	var editions []models.Edition
	if err := r.db.WithContext(ctx).Where("book_id = ?", bookID).Find(&editions).Error; err != nil {
		return nil, err
	}
	return editions, nil
}

// FindByISBN finds an edition by ISBN
func (r *editionRepository) FindByISBN(ctx context.Context, isbn string) (*models.Edition, error) {
	var edition models.Edition
	if err := r.db.WithContext(ctx).Where("isbn = ?", isbn).First(&edition).Error; err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			return nil, ErrEntityNotFound
		}
		return nil, err
	}
	return &edition, nil
}