text: /*
   * This file is part of the SDWebImage package.
   * (c) Olivier Poitrey <rs@dailymotion.com>
   *
   * For the full copyright and license information, please view the LICENSE
   * file that was distributed with this source code.
   */
  
  #import <Foundation/Foundation.h>
  #import "SDWebImageCompat.h"
  
  typedef NSData * _Nullable(^SDWebImageCacheSerializerBlock)(UIImage * _Nonnull image, NSData * _Nullable data, NSURL * _Nullable imageURL);
  
  /**
   This is the protocol for cache serializer.
   We can use a block to specify the cache serializer. But Using protocol can make this extensible, and allow Swift user to use it easily instead of using `@convention(block)` to store a block into context options.
   */
  @protocol SDWebImageCacheSerializer <NSObject>
  
  /// Provide the image data associated to the image and store to disk cache
  /// @param image The loaded image
  /// @param data The original loaded image data
  /// @param imageURL The image URL
  - (nullable NSData *)cacheDataWithImage:(nonnull UIImage *)image originalData:(nullable NSData *)data imageURL:(nullable NSURL *)imageURL;
  
  @end
  
  /**
   A cache serializer class with block.
   */
  @interface SDWebImageCacheSerializer : NSObject <SDWebImageCacheSerializer>
  
  - (nonnull instancetype)initWithBlock:(nonnull SDWebImageCacheSerializerBlock)block;
  + (nonnull instancetype)cacheSerializerWithBlock:(nonnull SDWebImageCacheSerializerBlock)block;
  
  @end
  