program SRLUpdater;
var
  MainMenuItem, MenuCheck, MenuUpdate,AutoUpdate : TMenuItem;
  started: Boolean;
  Timer : TTimer;
  Updating : boolean;
  LocalP,LocalS,OnlineP,OnlineS: Integer;

  F: TForm;
  Memo: TMemo;
  but: TButton;


function GetNumbers(const str : string) : string;
var
  i : integer;
begin;
  for i := 1 to length(str) do
    case str[i] of
      '0'..'9': result := result + str[i];
    end;
end;
  
procedure GetOnlineVersion(out PluginsVersion,SRLVersion : integer);
begin
  PluginsVersion := strtointdef(GetNumbers(getpage('http://wizzup.org/static/srl/plugins_version')),-1);  
  SRLVersion := strtointdef(GetNumbers(getpage('http://wizzup.org/static/srl/srl_version')),-1);
end;

procedure GetLocalVersion(out PluginsVersion,SRLVersion : integer);
begin
  PluginsVersion := StrToIntDef(Settings.GetKeyValueDef('PluginsVersion','-1'),-1);
  SRLVersion := StrToIntDef(Settings.GetKeyValueDef('SRLVersion','-1'),-1);  
end;

function UpdatePlugins: Boolean;
var
  I : integer;
  Contents : String;
  DeContents : string;
  Files : TStringArray;
  Failed,OverWrite : boolean;
begin
  Memo.Lines.Add('Downloading the plugins...');
	Contents := GetPage('http://wizzup.org/static/srl/simba_plugins.tar.bz2');
  Memo.Lines.Add('Uncompressing the plugins...');
	Failed := True;
	if DecompressBZip2(Contents,DeContents,4096) then
	  if ForceDirectories(IncludePath + 'SRL/SimbaPlugins/') then
	    if UnTarEx(DeContents,IncludePath + 'SRL/SimbaPlugins/',true) then
		begin;
		  Files := GetFiles(IncludePath + 'SRL/SimbaPlugins/','dll');
		  for i := 0 to high(Files) do
		    if FileExists(PluginPath + Files[i]) then
			  OverWrite := True;
		  if OverWrite then
		  begin;
		    case MessageDlg('SRL Updater', 'Do you want to overwrite the plugins?' ,mtConfirmation, [mbNo,mbYes],0) of
		      mrYes : Failed := not UnTarEx(DeContents,PluginPath,True)
		    else
		      Failed := not UnTarEx(DeContents,PluginPath,false);
			end;
			Writeln('A restart is necessary to activate the new plugins.');
		  end else
		    Failed := not UnTarEx(DeContents,PluginPath,false);
		end;
	if Failed then
    begin
	  Writeln('Failed to update the plugins');
      Memo.Lines.Add('Failed to update the plugins');
    end
	else
    begin
	  Writeln('Succesfully updated your plugins.');
      Memo.Lines.Add('Succesfully updated your plugins.');
    end;
	DeContents := '';
	Contents := '';
	Result := Failed;
	if not Failed then
	  Settings.SetKeyValue('PluginsVersion',inttostr(OnlineP));
end;

function UpdateSRL: boolean;
var
  Contents : String;
  DeContents : string;
  Failed : boolean;
begin
    Memo.Lines.Add('Downloading SRL...');
	Contents := GetPage('http://wizzup.org/static/srl/srl.tar.bz2');
	Failed := True;
    Memo.Lines.Add('Uncompressing SRL...');
	if DecompressBZip2(Contents,DeContents,4096) then
      if UnTarEx(DeContents,IncludePath,true) then
	    Failed := False;
	if not Failed then
	  Settings.SetKeyValue('SRLVersion',inttostr(OnlineS));
	if Result then
	  Result := Failed;
	if not Failed then
    begin
      Memo.Lines.Add('Succesfully updated your SRL!');
	  Writeln('Succesfully updated your SRL!');
    end;
end;

procedure DoUpdate(Sender: TObject);
begin
  if LocalP < OnlineP then
  begin
    Memo.Lines.Add('Plugins update. Old version: ' + IntToStr(LocalP) +
                   ' New version: ' + IntToStr(OnlineP));
    UpdatePlugins;
  end;
  if LocalS < OnlineS then
  begin
    Memo.Lines.Add('SRL update. Old version: ' + IntToStr(LocalS) +
                   ' New version: ' + IntToStr(OnlineS));
    UpdateSRL;
  end;
  F.ModalResult := mrOk;
end;


function Update : boolean;
var
   OpenForm: Boolean;
begin
  Result := false;
  if Updating then
    Exit;
  Updating := True;


  if (LocalP < OnlineP) or (LocalS < OnlineS) then
  begin
	case MessageDlg('SRL Updater', 'Updates are available. '+
                    'Do you want to open the Updater now?',
                    mtConfirmation, [mbNo,mbYes],0) of
	  mrYes : OpenForm := True;
 	else
	  OpenForm := False;
 	end;
    if not OpenForm then
    begin
      Updating := False;
      Exit;
    end;
    Result := True;
    f.ShowModal;
  end else
  begin
    writeln('No SRL update / Plugins update available!');
  end;

  Updating := False;

end;

procedure OnSRLCheckClick(Sender: TObject);
var
  LocalP,LocalS,OnlineP,OnlineS : integer;
begin
  GetLocalVersion(LocalP,LocalS);
  GetOnlineVersion(OnlineP,OnlineS);
  if (OnlineP > LocalP) or (OnlineS > LocalS) then
  begin;
    Writeln('A new SRL version is available');
    Update;
  end;
end;

procedure SetAutoUpdate(Sender: TObject);
begin
  AutoUpdate.Checked := not AutoUpdate.Checked;
  Timer.Enabled := AutoUpdate.Checked;
  if LowerCase(Settings.GetKeyValueDef('AutoUpdate','True')) = 'true' then
    Settings.SetKeyValue('AutoUpdate', 'False')
  else
    Settings.SetKeyValue('AutoUpdate', 'True');
end;

procedure OnSRLUpdateClick(Sender: TObject);
begin
  GetLocalVersion(LocalP,LocalS);
  GetOnlineVersion(OnlineP,OnlineS);
  if (OnlineP <= LocalP) and (OnlineS <= LocalS) then
    MessageDlg('SRL Updater', 'No SRL update / Plugins update available!', mtConfirmation, [mbYes], 0)
  else
    Update;
end;

procedure OnUpdateTimer(Sender: TObject);
begin;
  Timer.Interval := 30 * 60 * 1000; //Every half hour
  GetLocalVersion(LocalP,LocalS);
  GetOnlineVersion(OnlineP,OnlineS);
  Update;
end;

procedure Init;
begin;
  MainMenuItem := TMenuItem.Create(Simba_MainMenu);  
  MainMenuItem.Caption := 'SRL';
  Simba_MainMenu.Items.Add(MainMenuItem);

  MenuCheck := TMenuItem.Create(MainMenuItem);
  MenuCheck.Caption := 'Check for new SRL';
  MenuCheck.OnClick := @OnSRLCheckClick;
  MainMenuItem.Add(MenuCheck);

  MenuUpdate := TMenuItem.Create(MainMenuItem);
  MenuUpdate.Caption := 'Update SRL';
  MenuUpdate.OnClick := @OnSRLUpdateClick;
  MainMenuItem.Add(MenuUpdate);

  AutoUpdate := TMenuItem.Create(MainMenuItem);
  AutoUpdate.Caption := 'Automatically update';
  AutoUpdate.OnClick := @SetAutoUpdate;
  AutoUpdate.Checked := LowerCase(Settings.GetKeyValueDef('AutoUpdate','True')) = 'true';
  MainMenuItem.Add(AutoUpdate);
 
  Timer := TTimer.Create(Simba);
  Timer.Interval := 5000;
  Timer.OnTimer := @OnUpdateTimer;
  Timer.Enabled :=AutoUpdate.Checked;

  F := TForm.Create(nil);
  With F Do
    begin
      Visible := False;
      Width := 300;
      Height := 300;
      BorderStyle := bsSingle;
      Caption := 'SRL Updater - Updates Available';
    end;

  but := TButton.Create(F);

  with but do
    begin
      Parent := F;
      Left := 10;
      Top := 10;
      Caption := 'Update';
      Width := 280;

      OnClick := @DoUpdate;
    end;

  Memo := TMemo.Create(F);

  with Memo do
    begin
      Parent := F;
      Left := 10;
      Top := 40;
      Width := 280;
      Height := 250;
    end;

  started := True;
end;

procedure Free;
begin
  if (started) then
     Timer.Enabled := False;//Freeing the components is not needed, as they will be freed upon the freeing of Simba.
 { if F <> nil then
    F.Free; }
end;

procedure Attach;
begin;
  Writeln('From now on, you shall be alerted as to when your SRL is out of date!');
  MainMenuItem.Visible := True;
  Timer.Enabled := AutoUpdate.Checked;
end;

Procedure Detach;
begin
  Timer.Enabled := False;
  MainMenuItem.Visible := False;
end;

function GetName : string;
begin;
  result := 'SRL Updater';
end;

function GetVersion : string;
begin;
  result := '1.0';
end;
begin
end.