// Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
//
// You are hereby granted a non-exclusive, worldwide, royalty-free license to use,
// copy, modify, and distribute this software in source code or binary form for use
// in connection with the web services and APIs provided by Facebook.
//
// As with any software that integrates with the Facebook platform, your use of
// this software is subject to the Facebook Developer Principles and Policies
// [http://developers.facebook.com/policy/]. This copyright notice shall be
// included in all copies or substantial portions of the software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>

/*
  simple class to manage image downloads

 this class is not smart enough to dedupe identical requests in flight.
 */
@interface FBSDKImageDownloader : NSObject

+ (instancetype)sharedInstance;

/*
  download an image or retrieve it from cache
 - Parameter url: the url to download
 - Parameter ttl: the amount of time (in seconds) that using a cached version is acceptable.
 - Parameter completion: the callback with the image - for simplicity nil is returned rather than surfacing an error.
 */
- (void)downloadImageWithURL:(NSURL *)url ttl:(NSTimeInterval)ttl completion:(void(^)(UIImage* image))completion;

- (void)removeAll;

@end
