migrate from github

internal/repository/attachment_repo/attachment_repo.go

@@ -0,0 +1,47 @@
+package attachment_repo
+
+import (
+	"github.com/XingfenD/yoresee_doc/internal/model"
+	"gorm.io/gorm"
+)
+
+type AttachmentRepository struct {
+	db *gorm.DB
+}
+
+func NewAttachmentRepository(db *gorm.DB) *AttachmentRepository {
+	return &AttachmentRepository{db: db}
+}
+
+func (r *AttachmentRepository) Create(attachment *model.Attachment) error {
+	return r.db.Create(attachment).Error
+}
+
+func (r *AttachmentRepository) ListByDocumentID(documentID int64) ([]*model.Attachment, error) {
+	attachments := make([]*model.Attachment, 0)
+	if err := r.db.
+		Where("document_id = ?", documentID).
+		Order("created_at desc").
+		Find(&attachments).Error; err != nil {
+		return nil, err
+	}
+	return attachments, nil
+}
+
+func (r *AttachmentRepository) GetByExternalIDAndDocumentID(externalID string, documentID int64) (*model.Attachment, error) {
+	attachment := &model.Attachment{}
+	if err := r.db.
+		Where("external_id = ? AND document_id = ?", externalID, documentID).
+		First(attachment).Error; err != nil {
+		return nil, err
+	}
+	return attachment, nil
+}
+
+func (r *AttachmentRepository) DeleteByID(id int64) error {
+	return r.db.Delete(&model.Attachment{}, id).Error
+}
+
+func IsNotFound(err error) bool {
+	return err == gorm.ErrRecordNotFound
+}