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unit frmmain;
{$mode objfpc}{$H+}
// Define USESYNAPSE if you want to force use of synapse
{ $DEFINE USESYNAPSE}
// For version 2.6.4, synapse is the only option.
{$IFDEF VER2_6}
{$DEFINE USESYNAPSE}
{$ENDIF}
interface
uses
Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, StdCtrls,
synautil, IniFiles, googlebase, googleservice, googleclient, googletasks;
type
{ TMainForm }
TAccessTokenState = (acsWaiting,acsOK,acsCancel);
TMainForm = class(TForm)
BCancel: TButton;
BSetAccess: TButton;
BFetchTaskLists: TButton;
BFetchTasks: TButton;
EAccessCode: TEdit;
GBAccess: TGroupBox;
LTasks: TLabel;
LEAccess: TLabel;
LBTaskLists: TListBox;
LBTasks: TListBox;
procedure BCancelClick(Sender: TObject);
procedure BFetchTasksClick(Sender: TObject);
procedure BSetAccessClick(Sender: TObject);
procedure BFetchTaskListsClick(Sender: TObject);
Procedure DoUserConsent(Const AURL : String; Out AAuthCode : String) ;
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
procedure LBTaskListsSelectionChange(Sender: TObject; User: boolean);
private
{ private declarations }
FAccessState : TAccessTokenState;
FClient : TGoogleClient;
FTasksAPI: TTasksAPI;
FTaskLists: TTaskLists;
FCurrentList: TTaskList;
FTasks : TTasks;
procedure LoadAuthConfig;
procedure SaveRefreshToken;
public
{ public declarations }
end;
var
MainForm: TMainForm;
implementation
uses {$ifdef windows}windows,{$endif}
jsonparser, // needed
fpoauth2,
{$IFDEF USESYNAPSE}
ssl_openssl,
synapse,webclient
{$ELSE}
fphttpwebclient,
{$ENDIF}
lclintf;
{$R *.lfm}
{ TMainForm }
procedure TMainForm.FormCreate(Sender: TObject);
begin
// Register Tasks resources.
TTasksAPI.RegisterAPIResources;
// Set up google client.
FClient:=TGoogleClient.Create(Self);
{$IFDEF USESYNAPSE}
FClient.WebClient:=TSynapseWebClient.Create(Self);
{$ELSE}
FClient.WebClient:=TFPHTTPWebClient.Create(Self);
{$ENDIF}
FClient.WebClient.RequestSigner:=FClient.AuthHandler;
FClient.WebClient.LogFile:='requests.log';
FClient.AuthHandler.WebClient:=FClient.WebClient;
FClient.AuthHandler.Config.AccessType:=atOffLine;
// We want to enter a code.
FClient.OnUserConsent:=@DoUserConsent;
// Create a Tasks API and connect it to the client.
FTasksAPI:=TTasksAPI.Create(Self);
FTasksAPI.GoogleClient:=FClient;
end;
procedure TMainForm.FormDestroy(Sender: TObject);
begin
FreeAndNil(FTaskLists);
FreeAndNil(FTasks);
end;
procedure TMainForm.LBTaskListsSelectionChange(Sender: TObject; User: boolean);
begin
BFetchTasks.Enabled:=User and (LBTaskLists.ItemIndex<>-1);
if BFetchTasks.Enabled then
begin
FCurrentList:=LBTaskLists.Items.Objects[LBTaskLists.ItemIndex] as TTaskList;
LTasks.Caption:='Tasks for list : '+FCurrentList.Title;
end
else
begin
LTasks.Caption:='Tasks for list : <select as tasklist>';
LBTasks.Items.Clear;
FCurrentList:=Nil;
end;
end;
procedure TMainForm.LoadAuthConfig;
Var
ini:TIniFile;
begin
ini:=TIniFile.Create('google.ini');
try
// Registered application needs tasks scope
FClient.AuthHandler.Config.ClientID:=ini.ReadString('Credentials','ClientID','');;
FClient.AuthHandler.Config.ClientSecret:=ini.ReadString('Credentials','ClientSecret','');
FClient.AuthHandler.Config.AuthScope:=ini.ReadString('Credentials','Scope','https://www.googleapis.com/auth/tasks');
// We are offline.
FClient.AuthHandler.Config.RedirectUri:='urn:ietf:wg:oauth:2.0:oob';
// Session data
FClient.AuthHandler.Session.RefreshToken:=ini.ReadString('Session','RefreshToken','');
FClient.AuthHandler.Session.AccessToken:=ini.ReadString('Session','AccesToken','');
FClient.AuthHandler.Session.AuthTokenType:=ini.ReadString('Session','TokenType','');
FClient.AuthHandler.Session.AuthExpires:=ini.ReadDateTime('Session','AuthExpires',0);
FClient.AuthHandler.Session.AuthExpiryPeriod:=Ini.ReadInteger('Session','AuthPeriod',0);
finally
Ini.Free;
end;
end;
procedure TMainForm.SaveRefreshToken;
Var
ini:TIniFile;
begin
// We save the refresh token for later use.
if FClient.AuthHandler.Session.RefreshToken<>'' then
begin
ini:=TIniFile.Create('google.ini');
try
ini.WriteString('Session','RefreshToken',FClient.AuthHandler.Session.RefreshToken);
ini.WriteString('Session','AccessToken',FClient.AuthHandler.Session.AccessToken);
ini.WriteString('Session','TokenType',FClient.AuthHandler.Session.AuthTokenType);
ini.WriteDateTime('Session','AuthExpires',FClient.AuthHandler.Session.AuthExpires);
ini.WriteInteger('Session','AuthPeriod',FClient.AuthHandler.Session.AuthExpiryPeriod);
finally
Ini.Free;
end;
end;
end;
procedure TMainForm.BFetchTaskListsClick(Sender: TObject);
var
Entry: TTaskList;
Resource : TTaskListsResource;
EN : String;
i:integer;
begin
LBTaskLists.Items.Clear;
FreeAndNil(FTaskLists);
Resource:=Nil;
try
LoadAuthConfig;
Resource:=FTasksAPI.CreateTaskListsResource;
FTaskLists:=Resource.list('');
SaveRefreshToken;
if assigned(FTaskLists) then
for i:= 0 to Length(FTaskLists.items)-1 do
begin
Entry:=FTaskLists.items[i];
EN:=Entry.title;
LBTaskLists.Items.AddObject(IntToStr(i)+': '+EN,Entry);
end;
BFetchTasks.Enabled:=LBTaskLists.Items.Count>0;
finally
FreeAndNil(Resource);
end;
end;
procedure TMainForm.BSetAccessClick(Sender: TObject);
begin
FAccessState:=acsOK;
GBAccess.Visible:=False;
end;
procedure TMainForm.BCancelClick(Sender: TObject);
begin
FAccessState:=acsCancel;
GBAccess.Visible:=False;
end;
procedure TMainForm.BFetchTasksClick(Sender: TObject);
var
Entry: TTask;
EN : String;
i:integer;
begin
if LBTaskLists.ItemIndex<0 then
Exit;
LBTasks.Items.Clear;
FreeAndNil(FTasks);
FTasks:=FTasksAPI.TasksResource.list(FCurrentList.id,'');
SaveRefreshToken;
if assigned(FTasks) then
for i:= 0 to Length(FTasks.items)-1 do
begin
Entry:=FTasks.items[i];
EN:=Entry.title;
if EN='' then
EN:=Entry.id+' ('+Entry.Status+')';
if Entry.Completed<>0 then
EN:=EN+' (Completed :'+DateToStr(Entry.Completed)+')';
LBTasks.Items.AddObject(IntToStr(i)+': '+EN,Entry);
end;
end;
Procedure TMainForm.DoUserConsent(Const AURL: String; Out AAuthCode: String);
begin
GBAccess.Visible:=True;
EAccessCode.Text:='<enter code here>';
FAccessState:=acsWaiting;
OpenUrl(AURL);
While (FAccessState=acsWaiting) do
Application.ProcessMessages;
if FAccessState=acsOK then
AAuthCode:=EAccessCode.Text;
GBAccess.Visible:=False;
end;
end.
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