// Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
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//
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// You are hereby granted a non-exclusive, worldwide, royalty-free license to use,
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// copy, modify, and distribute this software in source code or binary form for use
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// in connection with the web services and APIs provided by Facebook.
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//
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// As with any software that integrates with the Facebook platform, your use of
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// this software is subject to the Facebook Developer Principles and Policies
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// [http://developers.facebook.com/policy/]. This copyright notice shall be
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// included in all copies or substantial portions of the software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#import <Foundation/Foundation.h>
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/**
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Class to contain common utility methods.
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*/
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@interface FBSDKUtility : NSObject
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- (instancetype)init NS_UNAVAILABLE;
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+ (instancetype)new NS_UNAVAILABLE;
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/**
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Parses a query string into a dictionary.
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@param queryString The query string value.
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@return A dictionary with the key/value pairs.
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*/
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+ (NSDictionary *)dictionaryWithQueryString:(NSString *)queryString;
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/**
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Constructs a query string from a dictionary.
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@param dictionary The dictionary with key/value pairs for the query string.
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@param errorRef If an error occurs, upon return contains an NSError object that describes the problem.
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@return Query string representation of the parameters.
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*/
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+ (NSString *)queryStringWithDictionary:(NSDictionary *)dictionary error:(NSError *__autoreleasing *)errorRef;
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/**
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Decodes a value from an URL.
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@param value The value to decode.
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@return The decoded value.
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*/
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+ (NSString *)URLDecode:(NSString *)value;
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/**
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Encodes a value for an URL.
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@param value The value to encode.
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@return The encoded value.
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*/
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+ (NSString *)URLEncode:(NSString *)value;
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/**
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Creates a timer using Grand Central Dispatch.
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@param interval The interval to fire the timer, in seconds.
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@param block The code block to execute when timer is fired.
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@return The dispatch handle.
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*/
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+ (dispatch_source_t)startGCDTimerWithInterval:(double)interval block:(dispatch_block_t)block;
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/**
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Stop a timer that was started by startGCDTimerWithInterval.
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@param timer The dispatch handle received from startGCDTimerWithInterval.
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*/
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+ (void)stopGCDTimer:(dispatch_source_t)timer;
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/**
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Get SHA256 hased string of NSString/NSData
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@param input The data that needs to be hashed, it could be NSString or NSData.
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*/
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+ (NSString *)SHA256Hash:(NSObject *)input;
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@end
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