//
  //  VKUtil.h
  //
  //  Copyright (c) 2014 VK.com
  //
  //  Permission is hereby granted, free of charge, to any person obtaining a copy of
  //  this software and associated documentation files (the "Software"), to deal in
  //  the Software without restriction, including without limitation the rights to
  //  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
  //  the Software, and to permit persons to whom the Software is furnished to do so,
  //  subject to the following conditions:
  //
  //  The above copyright notice and this permission 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.
  
  #define VK_SYSTEM_VERSION_EQUAL_TO(v)                  ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedSame)
  #define VK_SYSTEM_VERSION_GREATER_THAN(v)              ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedDescending)
  #define VK_SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(v)  ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedAscending)
  #define VK_SYSTEM_VERSION_LESS_THAN(v)                 ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedAscending)
  #define VK_SYSTEM_VERSION_LESS_THAN_OR_EQUAL_TO(v)     ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedDescending)
  #define VK_COLOR                                       [UIColor colorWithRed:85.0f / 255 green:133.0f / 255 blue:188.0f / 255 alpha:1.0f]
  #define VK_IS_DEVICE_IPAD                               (UIUserInterfaceIdiomPad == [[UIDevice currentDevice] userInterfaceIdiom])
  
  #import <UIKit/UIKit.h>
  
  /**
  Various functions
  */
  @interface VKUtil : NSObject
  /**
  Breaks key=value string to dictionary
  @param queryString string with key=value pairs joined by & symbol
  @return Dictionary of parameters
  */
  + (NSDictionary *)explodeQueryString:(NSString *)queryString;
  
  + (NSString *)generateGUID;
  
  + (NSNumber *)parseNumberString:(id)number;
  
  + (UIColor *)colorWithRGB:(NSInteger)rgb;
  
  + (NSString *)queryStringFromParams:(NSDictionary *)params;
  @end
  
  
  @interface UIImage (RoundedImage)
  - (UIImage *)vks_roundCornersImage:(CGFloat)cornerRadius resultSize:(CGSize)imageSize;
  @end
  
  static inline NSNumber *VK_ENSURE_NUM(id obj) {
      return [obj isKindOfClass:[NSNumber class]] ? obj : nil;
  }
  
  static inline NSDictionary *VK_ENSURE_DICT(id data) {
      return [data isKindOfClass:NSDictionary.class] ? data : nil;
  }
  
  static inline NSArray *VK_ENSURE_ARRAY(id data) {
      return [data isKindOfClass:NSArray.class] ? data : nil;
  }