{
  $Project$
  $Workfile$
  $Revision$
  $DateUTC$
  $Id$

  This file is part of the Indy (Internet Direct) project, and is offered
  under the dual-licensing agreement described on the Indy website.
  (http://www.indyproject.org/)

  Copyright:
   (c) 1993-2005, Chad Z. Hower and the Indy Pit Crew. All rights reserved.
}
{
  $Log$
}
{
  Rev 1.5    2004.02.03 4:17:14 PM  czhower
  For unit name changes.

  Rev 1.4    2004.01.20 10:03:28 PM  czhower
  InitComponent

  Rev 1.3    2003.10.17 6:15:54 PM  czhower
  Upgrades

  Rev 1.2    2003.10.14 1:27:08 PM  czhower
  Uupdates + Intercept support

  Rev 1.1    6/16/2003 10:39:02 AM  EHill
  Done: Expose Open/Close as public in TIdLogBase

  Rev 1.0    11/13/2002 07:55:58 AM  JPMugaas
}

unit IdLogBase;

interface

uses
  IdIntercept, IdGlobal, IdSocketHandle, IdObjs, IdBaseComponent;

type
  TIdLogBase = class(TIdConnectionIntercept)
  protected
    FActive: Boolean;
    FLogTime: Boolean;
    FReplaceCRLF: Boolean;
    FStreamedActive: Boolean;
    //
    procedure InitComponent; override;
    procedure LogStatus(const AText: string); virtual; abstract;
    procedure LogReceivedData(const AText, AData: string); virtual; abstract;
    procedure LogSentData(const AText, AData: string); virtual; abstract;
    procedure SetActive(AValue: Boolean); virtual;
    procedure Loaded; override;
    function ReplaceCR(const AString : String) : String;
  public
    procedure Open; virtual;
    procedure Close; virtual;
    procedure Connect(AConnection: TIdNativeComponent); override;
    destructor Destroy; override;
    procedure Disconnect; override;
    procedure Receive(var ABuffer: TIdBytes); override;
    procedure Send(var ABuffer: TIdBytes); override;
  published
    property Active: Boolean read FActive write SetActive default False;
    property LogTime: Boolean read FLogTime write FLogTime default True;
    property ReplaceCRLF: Boolean read FReplaceCRLF write FReplaceCRLF default true;
  end;

implementation

uses
  IdResourceStringsCore, IdSys;

const
  LOldStr : array [0..2] of string =
    ( EOL,  CR,
      LF);
  LNewStr : array [0..2] of string =
     (RSLogEOL,
     RSLogCR,
     RSLogLF);
{ TIdLogBase }

procedure TIdLogBase.Close;
begin
end;

procedure TIdLogBase.Connect(AConnection: TIdNativeComponent);
begin
  if FActive then begin
    inherited Connect(AConnection);
    LogStatus(RSLogConnected);
  end;
end;

destructor TIdLogBase.Destroy;
begin
  Active := False;
  inherited Destroy;
end;

procedure TIdLogBase.Disconnect;
begin
  if FActive then begin
    LogStatus(RSLogDisconnected);
    inherited Disconnect;
  end;
end;

procedure TIdLogBase.InitComponent;
begin
  inherited InitComponent;
  FLogTime := True;
  ReplaceCRLF := True;
end;

procedure TIdLogBase.Loaded;
begin
  inherited Loaded;
  Active := FStreamedActive;
end;

procedure TIdLogBase.Open;
begin
end;

procedure TIdLogBase.Receive(var ABuffer: TIdBytes);
var
  s: string;
  LMsg: string;
begin
  if FActive then begin
    inherited Receive(ABuffer);
    LMsg := '';
    if LogTime then begin
      LMsg := Sys.DateTimeToStr(Sys.Now);
    end;
    s := BytesToString(ABuffer);
    if FReplaceCRLF then begin
      s :=  ReplaceCR(S);
    end;
    LogReceivedData(LMsg, s);
  end;
end;

function TIdLogBase.ReplaceCR(const AString: String): String;
begin
  Result := Sys.StringReplace(AString,LOldStr,LNewStr);
end;

procedure TIdLogBase.Send(var ABuffer: TIdBytes);
var
  s: string;
  LMsg: string;
begin
  if FActive then begin
    inherited Send(ABuffer);
    LMsg := '';
    if LogTime then begin
      LMsg := Sys.DateTimeToStr(Sys.Now);
    end;
    s := BytesToString(ABuffer);
    if FReplaceCRLF then begin
      s := ReplaceCR(S);
    end;
    LogSentData(LMsg, s);
  end;
end;

procedure TIdLogBase.SetActive(AValue: Boolean);
begin
  if IsLoading then
    FStreamedActive := AValue
  else
    if FActive <> AValue then
    begin
      FActive := AValue;
      if FActive then
        Open
      else
        Close;
    end;
end;

end.


