InlineRefactoringAfter.pas

//  Copyright (c) 2017, Jordi Corbilla
//  All rights reserved.
//
//  Redistribution and use in source and binary forms, with or without
//  modification, are permitted provided that the following conditions are met:
//
//  - Redistributions of source code must retain the above copyright notice,
//    this list of conditions and the following disclaimer.
//  - Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
//  - Neither the name of this library nor the names of its contributors may be
//    used to endorse or promote products derived from this software without
//    specific prior written permission.
//
//  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
//  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
//  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
//  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
//  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
//  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
//  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
//  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
//  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
//  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
//  POSSIBILITY OF SUCH DAMAGE.

type
  TOperator<T, U> = reference to function(value : T): U;
  TFactory<T> = reference to function(value : T) : T;

  TRequest<T, U> = class(TObject)
    function ResultsInlineRefactoring(value : T; factory : TFactory<T>; operation : TOperator<T, U>) : U;
  end;

implementation

function TRequest<T, U>.ResultsInlineRefactoring(value : T; factory : TFactory<T>; operation : TOperator<T, U>) : U;
begin
  result := operation(factory(value));
end;

function TMyQuery.ResultsFuncInlineRefactoring(url: string): TList<string>;
var
  request : TRequest<String, TList<string>>;
  return : TList<string>;
begin
  request := TRequest<String, TList<string>>.create();
  try
    return := request.ResultsInlineRefactoring(url, GetContent, ParseHTML);
  finally
    request.Free;
  end;
  result := return;
end;

function TMyQuery.GetContent(url: string) : string;
var
  IdHTTP: TIdHTTP;
  IdIOHandler: TIdSSLIOHandlerSocketOpenSSL;
begin
  CoInitialize(nil);
  IdIOHandler := TIdSSLIOHandlerSocketOpenSSL.Create(nil);
  try
    IdIOHandler.ReadTimeout := IdTimeoutInfinite;
    IdIOHandler.ConnectTimeout := IdTimeoutInfinite;
    IdHTTP := TIdHTTP.Create(nil);
    try
      IdHTTP.IOHandler := IdIOHandler;
      result := IdHTTP.Get(url);
    finally
      IdIOHandler.Free;
      IdHTTP.Free;
    end;
  finally
    CoUninitialize;
  end;
end;