/
service_impl.go
97 lines (80 loc) · 2.01 KB
/
service_impl.go
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package app
import (
"errors"
"fmt"
"github.com/fabiante/persurl/app/models"
"gorm.io/gorm"
)
// service implements ServiceInterface based on a SQL database, acessed via gorm.DB
//
// The given gorm.DB instance is expected to have enabled error translation. This is required for properly
// mapping errors onto application specific errors.
type service struct {
db *gorm.DB
}
func NewService(db *gorm.DB) ServiceInterface {
return &service{db: db}
}
func (s *service) Resolve(domain, name string) (string, error) {
purl := &models.PURL{}
err := s.db.Model(&models.PURL{}).
Joins("join domains on domains.id = purls.domain_id").
Where("domains.name = ?", domain).
Where("purls.name = ?", name).
Take(purl).Error
switch {
case err == nil:
return purl.Target, nil
case errors.Is(err, gorm.ErrRecordNotFound):
return "", ErrNotFound
default:
return "", mapDBError(err)
}
}
func (s *service) CreateDomain(name string) (*models.Domain, error) {
domain := &models.Domain{
Name: name,
}
err := s.db.Create(domain).Error
switch {
case err != nil:
return nil, mapDBError(err)
default:
return domain, nil
}
}
func (s *service) GetDomain(name string) (*models.Domain, error) {
domain := &models.Domain{}
err := s.db.Where("name", name).Take(domain).Error
if err != nil {
switch {
case errors.Is(err, gorm.ErrRecordNotFound):
return nil, fmt.Errorf("%w: domain does not exist", ErrNotFound)
case err != nil:
return nil, mapDBError(err)
}
}
return domain, nil
}
func (s *service) SavePURL(domain *models.Domain, name, target string) error {
err := s.db.FirstOrCreate(&models.PURL{
DomainID: domain.ID,
Name: name,
Target: target,
}).Error
switch {
case errors.Is(err, gorm.ErrRecordNotFound):
return fmt.Errorf("%w: domain does not exist", ErrBadRequest)
case err != nil:
return mapDBError(err)
}
return nil
}
func mapDBError(err error) error {
switch {
case errors.Is(err, gorm.ErrDuplicatedKey):
return fmt.Errorf("%w: %s", ErrBadRequest, err)
default:
return err
}
}