//
  //  VKBatchRequest.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.
  
  #import "VKObject.h"
  #import "VKRequest.h"
  
  /**
  Used for execution bunch of methods at time, and receive results of that methods in array
  */
  @interface VKBatchRequest : VKObject {
  @private
  
      NSMutableArray *_requests;
      NSMutableArray *_responses;
      BOOL _canceled;
  }
  /// Specify completion block for request
  @property(nonatomic, copy) void (^completeBlock)(NSArray *responses);
  /// Specity error (HTTP or API) block for request.
  @property(nonatomic, copy) void (^errorBlock)(NSError *error);
  
  /**
  Initializes batch processing with requests
  @param firstRequest ,... A comma-separated list of requests should be loaded, ending with nil.
  @return Prepared request
  */
  - (instancetype)initWithRequests:(VKRequest *)firstRequest, ...NS_REQUIRES_NIL_TERMINATION;
  
  /**
  Initializes batch processing with requests array
  @param requests Array of requests should be loaded.
  @return Prepared request
  */
  - (instancetype)initWithRequestsArray:(NSArray *)requests;
  
  /**
  Executes batch request
  @param completeBlock will receive result of passed requests
  @param errorBlock called if any request did fail
  */
  - (void)executeWithResultBlock:(void (^)(NSArray *responses))completeBlock errorBlock:(void (^)(NSError *))errorBlock;
  
  /**
  Cancel current batch operation
  */
  - (void)cancel;
  @end