/*
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* This file is part of the SDWebImage package.
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* (c) Olivier Poitrey <rs@dailymotion.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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#import <Foundation/Foundation.h>
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#import "SDWebImageCompat.h"
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typedef NSString * _Nullable(^SDWebImageCacheKeyFilterBlock)(NSURL * _Nonnull url);
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/**
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This is the protocol for cache key filter.
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We can use a block to specify the cache key filter. 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.
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*/
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@protocol SDWebImageCacheKeyFilter <NSObject>
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- (nullable NSString *)cacheKeyForURL:(nonnull NSURL *)url;
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@end
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/**
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A cache key filter class with block.
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*/
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@interface SDWebImageCacheKeyFilter : NSObject <SDWebImageCacheKeyFilter>
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- (nonnull instancetype)init NS_UNAVAILABLE;
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+ (nonnull instancetype)new NS_UNAVAILABLE;
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- (nonnull instancetype)initWithBlock:(nonnull SDWebImageCacheKeyFilterBlock)block;
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+ (nonnull instancetype)cacheKeyFilterWithBlock:(nonnull SDWebImageCacheKeyFilterBlock)block;
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@end
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