unit EditTextU;
   (* 
   WorldVistA Configuration Utility
   (c) 8/2008 Kevin Toppenberg
   Programmed by Kevin Toppenberg, Eddie Hagood  
   
   Family Physicians of Greeneville, PC
   1410 Tusculum Blvd, Suite 2600
   Greeneville, TN 37745
   kdtop@yahoo.com
                                                 
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with this library; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  *)   

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, Buttons, ExtCtrls;

type
  TEditTextForm = class(TForm)
    Panel1: TPanel;
    Memo: TMemo;
    RevertBtn: TBitBtn;
    ApplyBtn: TBitBtn;
    DoneBtn: TBitBtn;
    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
    procedure RevertBtnClick(Sender: TObject);
    procedure ApplyBtnClick(Sender: TObject);
    procedure DoneBtnClick(Sender: TObject);
    procedure MemoChange(Sender: TObject);
    procedure FormHide(Sender: TObject);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
  private
    { Private declarations }
    FCachedText : TStringList;
    FFileNum,FFieldNum,FIENS : String;
    function GetWPField(FileNum,FieldNum,IENS : string) : TStringList;
    procedure PostWPField(Lines: TStrings; FileNum,FieldNum,IENS : string);
  public
    { Public declarations }
    procedure PrepForm(FileNum,FieldNum,IENS : string);
  end;

var
  EditTextForm: TEditTextForm;

implementation

uses FMErrorU, ORNet, ORFn,
     Trpcb ;  //needed for .ptype types

{$R *.dfm}

  procedure TEditTextForm.PrepForm(FileNum,FieldNum,IENS : string);
  begin
    FFileNum := FileNum;
    FFieldNum := FieldNum;
    FIENS := IENS;
    Memo.Lines.Clear;
    Memo.Lines.Assign(GetWPField(FileNum,FieldNum,IENS));
    ApplyBtn.Enabled := false;
    RevertBtn.Enabled := false;
  end;

  procedure TEditTextForm.FormCreate(Sender: TObject);
  begin
    FCachedText := TStringList.Create;

  end;

  procedure TEditTextForm.FormDestroy(Sender: TObject);
  begin
    FCachedText.Free;
  end;


  function TEditTextForm.GetWPField(FileNum,FieldNum,IENS : string) : TStringList;
  var   RPCResult: string;
        cmd : string;
        lastLine : string;
  begin
    FCachedText.clear;
    RPCBrokerV.Results.Clear;
    RPCBrokerV.remoteprocedure := 'TMG CHANNEL';
    RPCBrokerV.param[0].ptype := list;
    cmd := 'GET ONE WP FIELD^' + FileNum + '^' + FieldNum + '^' + IENS;
    RPCBrokerV.Param[0].Mult['"REQUEST"'] := cmd; 
    //RPCBrokerV.Call;
    CallBroker;
    RPCResult := RPCBrokerV.Results[0];    //returns:  error: -1;  success=1
    if piece(RPCResult,'^',1)='-1' then begin
      FMErrorForm.Memo.Lines.Assign(RPCBrokerV.Results);
      FMErrorForm.PrepMessage;
      FMErrorForm.ShowModal;
    end else begin
      FCachedText.Assign(RPCBrokerV.Results);
      FCachedText.Delete(0);
      lastLine := FCachedText.Strings[FCachedText.Count-1];
      //I can't figure out where these are coming from...
      if (lastLine='WORD-PROCESSING') or (lastLine = 'POINTER') 
      or (lastLine='FREE TEXT') then begin
        FCachedText.Delete(FCachedText.Count-1);
      end;
    end;
    result := FCachedText;
  end;


  procedure TEditTextForm.PostWPField(Lines: TStrings; FileNum,FieldNum,IENS : string);
  var   RPCResult: string;
        cmd : string;
        lastLine : string;
        i : integer;
  begin
    RPCBrokerV.Results.Clear;
    RPCBrokerV.remoteprocedure := 'TMG CHANNEL';
    RPCBrokerV.param[0].ptype := list;
    cmd := 'POST WP FIELD^' + FileNum + '^' + FieldNum + '^' + IENS;
    RPCBrokerV.Param[0].Mult['"REQUEST"'] := cmd;
    for i := 0 to Lines.Count-1 do begin
      RPCBrokerV.Param[0].Mult['"' + IntToStr(i+1) + '"'] := Lines.Strings[i];
    end;
    //RPCBrokerV.Call;
    CallBroker;
    RPCResult := RPCBrokerV.Results[0];    //returns:  error: -1;  success=1
    if piece(RPCResult,'^',1)='-1' then begin
      FMErrorForm.Memo.Lines.Assign(RPCBrokerV.Results);
      FMErrorForm.PrepMessage;
      FMErrorForm.ShowModal;
    end else begin
      FCachedText.Assign(Lines);
    end;
  end;
  
  
  procedure TEditTextForm.RevertBtnClick(Sender: TObject);
  begin
    if MessageDlg('Abort editing changes and revert to original?',mtWarning,mbOKCancel,0) = mrOK then begin
      Memo.Lines.Assign(FCachedText);
    end;
  end;

  procedure TEditTextForm.ApplyBtnClick(Sender: TObject);
  begin
    if FCachedText.Text <> Memo.Lines.Text then begin
      //MessageDlg('Here I will post changes',mtInformation,[mbOK],0);
      PostWPField(Memo.Lines,FFileNum,FFieldNum,FIENS);     
    end;
    ApplyBtn.Enabled := false;
    RevertBtn.Enabled := false;
  end;

  procedure TEditTextForm.DoneBtnClick(Sender: TObject);
  begin
    ApplyBtnClick(self);
    ModalResult := mrOK;
  end;

  procedure TEditTextForm.MemoChange(Sender: TObject);
  begin
    ApplyBtn.Enabled := true;
    RevertBtn.Enabled := true;
  end;

  procedure TEditTextForm.FormHide(Sender: TObject);
  begin
    ApplyBtnClick(self);
  end;

  procedure TEditTextForm.FormClose(Sender: TObject; var Action: TCloseAction);
  begin
    ApplyBtnClick(self);
  end;

end.