(Delphi ActiveX) Get the Photos for a User

Demonstrates how to get the photos that the user has uploaded.

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
oauth2: TChilkatOAuth2;
rest: TChilkatRest;
success: Integer;
responseJson: WideString;
json: TChilkatJsonObject;
dtime: TCkDateTime;
bLocalTime: Integer;
dt: IDtObj;
i: Integer;
numItems: Integer;
name: WideString;

begin
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// This example assumes a previously obtained an access token
oauth2 := TChilkatOAuth2.Create(Self);
oauth2.AccessToken := 'FACEBOOK-ACCESS-TOKEN';

rest := TChilkatRest.Create(Self);

// Connect to Facebook.
success := rest.Connect('graph.facebook.com',443,1,1);
if (success <> 1) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;

// Provide the authentication credentials (i.e. the access key)
rest.SetAuthOAuth2(oauth2.ControlInterface);

// Indicate that we only want the photos the user has personally uploaded.
rest.AddQueryParam('type','uploaded');

// We could limit the number of photos by setting a limit.
rest.AddQueryParam('limit','5');

// Gets the 1st page of photos. (Not the actual image data, but the information about each photo.)
// See https://developers.facebook.com/docs/graph-api/reference/user/photos/ for more information.
responseJson := rest.FullRequestNoBody('GET','/v2.7/me/photos');
if (rest.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;

json := TChilkatJsonObject.Create(Self);
json.EmitCompact := 0;
json.Load(responseJson);
Memo1.Lines.Add(json.Emit());

// A sample JSON response is shown below.  
// This is the code to parse the JSON response.

dtime := TCkDateTime.Create(Self);
bLocalTime := 1;

i := 0;
numItems := json.SizeOfArray('data');
while i < numItems do
  begin
    json.I := i;
    Memo1.Lines.Add('--- ' + IntToStr(i));
    name := json.StringOf('data[i].name');
    if (json.LastMethodSuccess = 1) then
      begin
        Memo1.Lines.Add('name: ' + name);
      end;
    Memo1.Lines.Add('id: ' + json.StringOf('data[i].id'));

    // We can load the created_time into a CkDateTime...
    dtime.SetFromTimestamp(json.StringOf('data[i].created_time'));
    dt := dtime.GetDtObj(bLocalTime);
    Memo1.Lines.Add(IntToStr(dt.Month) + '/' + IntToStr(dt.Day) + '/' + IntToStr(dt.Year) + '  ' + IntToStr(dt.Hour)
         + ':' + IntToStr(dt.Minute));

    i := i + 1;
  end;

// We can get the paging information as follows:
Memo1.Lines.Add('URL for next page: ' + json.StringOf('paging.next'));
Memo1.Lines.Add('before cursor: ' + json.StringOf('paging.cursors.before'));
Memo1.Lines.Add('after cursor: ' + json.StringOf('paging.cursors.after'));

// This is a sample JSON response:
// { 
//   "data": [
//     {
//       "created_time": "2016-09-29T20:46:18+0000",
//       "name": "Ignore my posts -- I'm doing some testing for Facebook related programming...",
//       "id": "10210199026347451"
//     },
//     { 
//       "created_time": "2016-09-19T02:00:42+0000",
//       "id": "10210091531240138"
//     },
//     { 
//       "created_time": "2016-09-19T02:00:42+0000",
//       "id": "10210091520620125"
//     },
//     { 
//       "created_time": "2016-09-19T01:59:46+0000",
//       "name": "I would've went for a swim had it not been for the sign",
//       "id": "10210091522299917"
//     },
//     { 
//       "created_time": "2016-09-12T00:37:35+0000",
//       "id": "10210023316834798"
//     }
//   ],
//   "paging": { 
//     "cursors": { 
//       "before": "MTAyMTAxOTkwMjYzNDc0NTEZD",
//       "after": "MTAyMTAwMjMzMTU4MzQ3OTgZD"
//     },
//     "next": "https:\/\/graph.facebook.com\/v2.7\/10224048320139890\/photos?type=uploaded&limit=5&after=MTAyMTAwMjMzMTU4MzQ3OTgZD"
//   }
// }
// 
end;