feat: v2 (#599)

Read https://github.com/filebrowser/filebrowser/pull/575.

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Former-commit-id: 0c7d925a38a68ccabdf2c4bbd8c302ee89b93509 [formerly a6173925a1382955d93b334ded93f70d6dddd694]
Former-commit-id: e032e0804dd051df86f42962de2b39caec5318b7

share/storage.go

@@ -0,0 +1,74 @@
+package share
+
+import (
+	"time"
+
+	"github.com/filebrowser/filebrowser/v2/errors"
+)
+
+// StorageBackend is the interface to implement for a share storage.
+type StorageBackend interface {
+	GetByHash(hash string) (*Link, error)
+	GetPermanent(path string, id uint) (*Link, error)
+	Gets(path string, id uint) ([]*Link, error)
+	Save(s *Link) error
+	Delete(hash string) error
+}
+
+// Storage is a storage.
+type Storage struct {
+	back StorageBackend
+}
+
+// NewStorage creates a share links storage from a backend.
+func NewStorage(back StorageBackend) *Storage {
+	return &Storage{back: back}
+}
+
+// GetByHash wraps a StorageBackend.GetByHash.
+func (s *Storage) GetByHash(hash string) (*Link, error) {
+	link, err := s.back.GetByHash(hash)
+	if err != nil {
+		return nil, err
+	}
+
+	if link.Expire != 0 && link.Expire <= time.Now().Unix() {
+		s.Delete(link.Hash)
+		return nil, errors.ErrNotExist
+	}
+
+	return link, nil
+}
+
+// GetPermanent wraps a StorageBackend.GetPermanent
+func (s *Storage) GetPermanent(path string, id uint) (*Link, error) {
+	return s.back.GetPermanent(path, id)
+}
+
+// Gets wraps a StorageBackend.Gets
+func (s *Storage) Gets(path string, id uint) ([]*Link, error) {
+	links, err := s.back.Gets(path, id)
+
+	if err != nil {
+		return nil, err
+	}
+
+	for i, link := range links {
+		if link.Expire != 0 && link.Expire <= time.Now().Unix() {
+			s.Delete(link.Hash)
+			links = append(links[:i], links[i+1:]...)
+		}
+	}
+
+	return links, nil
+}
+
+// Save wraps a StorageBackend.Save
+func (s *Storage) Save(l *Link) error {
+	return s.back.Save(l)
+}
+
+// Delete wraps a StorageBackend.Delete
+func (s *Storage) Delete(hash string) error {
+	return s.back.Delete(hash)
+}