github.com/readium/readium-lcp-server@v0.0.0-20240101192032-6e95190e99f1/storage/nostore.go (about)

     1  // Copyright (c) 2022 Readium Foundation
     2  // Use of this source code is governed by a BSD-style license
     3  // that can be found in the LICENSE file exposed on Github (readium) in the project repository.
     4  
     5  package storage
     6  
     7  import (
     8  	"io"
     9  )
    10  
    11  // void storage, created to avoid breaking interfaces in case the storage is handled by the encryption tool.
    12  
    13  type noStorage struct {
    14  }
    15  
    16  type noItem struct {
    17  	name string
    18  }
    19  
    20  // noItem functions
    21  
    22  func (i noItem) Key() string {
    23  	return i.name
    24  }
    25  
    26  func (i noItem) PublicURL() string {
    27  	return ""
    28  }
    29  
    30  func (i noItem) Contents() (io.ReadCloser, error) {
    31  	return nil, ErrNotFound
    32  }
    33  
    34  // noStorage functions
    35  
    36  func (s noStorage) Add(key string, r io.ReadSeeker) (Item, error) {
    37  	return &noItem{name: key}, nil
    38  }
    39  
    40  func (s noStorage) Get(key string) (Item, error) {
    41  	return nil, ErrNotFound
    42  }
    43  
    44  func (s noStorage) Remove(key string) error {
    45  	return ErrNotFound
    46  }
    47  
    48  func (s noStorage) List() ([]Item, error) {
    49  	return nil, ErrNotFound
    50  }
    51  
    52  // NoStorage creates a new void storage
    53  //
    54  func NoStorage() Store {
    55  	return noStorage{}
    56  }