91 lines
1.8 KiB
Go
91 lines
1.8 KiB
Go
package link
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import (
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apperrors "cgnolink/errors"
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"github.com/patrickmn/go-cache"
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)
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type Service interface {
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Create(link *Link) error
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GetById(id string) (*Link, error)
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GetAll(limit int, offset int) (Links, error)
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Update(data *Link) error
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DeleteById(id string) error
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}
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type PgService struct {
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rep Repository
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cache *cache.Cache
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}
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func NewService(rep Repository) Service {
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return &PgService{
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rep: rep,
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cache: cache.New(cache.NoExpiration, 0),
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}
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}
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func (s *PgService) Create(link *Link) error {
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existingLink, err := s.rep.FindById(link.Id)
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if err != nil {
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return apperrors.UnknownError{Err: err}
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}
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if existingLink != nil {
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return apperrors.AlreadyExistsError{Message: "Link with given ID already exists."}
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}
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if err = s.rep.Save(link); err != nil {
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return apperrors.UnknownError{Err: err}
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}
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return nil
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}
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func (s *PgService) GetById(id string) (*Link, error) {
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if v, found := s.cache.Get(id); found {
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if link, ok := v.(*Link); ok {
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return link, nil
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}
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}
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link, err := s.rep.FindById(id)
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if err != nil {
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return nil, apperrors.UnknownError{Err: err}
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}
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if link == nil {
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return nil, apperrors.NotFoundError{Message: "Link with given ID was not found."}
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}
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s.cache.Set(id, link, cache.DefaultExpiration)
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return link, nil
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}
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func (s *PgService) GetAll(limit int, offset int) (Links, error) {
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links, err := s.rep.FindAll(limit, offset)
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if err != nil {
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return nil, apperrors.UnknownError{Err: err}
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}
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return links, nil
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}
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func (s *PgService) Update(data *Link) error {
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if err := s.rep.Update(data); err != nil {
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return apperrors.UnknownError{Err: err}
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}
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return nil
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}
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func (s *PgService) DeleteById(id string) error {
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s.cache.Delete(id)
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if err := s.rep.DeleteById(id); err != nil {
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return apperrors.UnknownError{Err: err}
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}
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return nil
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}
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