Delphi DLL Google Drive: List Changes to a TeamDrive

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Download a list of changes to a teamdrive. This example lists the changes for the team drive having id = "0AEd3EhGff2SaUk9PVA". The "pageToken" is obtained from a previous call to /drive/v3/changes/startPageToken or from the "nextPageToken" member of the previous call to list changes.

Documentation: https://developers.google.com/drive/v3/reference/changes/list

var
rest: HCkRest;
success: Boolean;
oauth2: HCkOAuth2;
sbJson: HCkStringBuilder;
json: HCkJsonObject;
kind: PWideChar;
newStartPageToken: PWideChar;
i: Integer;
count_i: Integer;
type: PWideChar;
time: PWideChar;
removed: Boolean;
fileId: PWideChar;
fileKind: PWideChar;
fileName: PWideChar;
fileMimeType: PWideChar;
fileTeamDriveId: PWideChar;

begin
rest := CkRest_Create();

//   Provide a previously obtained OAuth2 access token.
oauth2 := CkOAuth2_Create();
CkOAuth2_putAccessToken(oauth2,'OAUTH2_ACCESS_TOKEN');
CkRest_SetAuthOAuth2(rest,oauth2);

success := CkRest_Connect(rest,'www.googleapis.com',443,True,True);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkRest__lastErrorText(rest));
    Exit;
  end;

CkRest_AddQueryParam(rest,'teamDriveId','0AEd3EhGff2SaUk9PVA');
CkRest_AddQueryParam(rest,'pageToken','13');
CkRest_AddQueryParam(rest,'includeTeamDriveItems','true');
CkRest_AddQueryParam(rest,'supportsTeamDrives','true');

sbJson := CkStringBuilder_Create();
success := CkRest_FullRequestNoBodySb(rest,'GET','/drive/v3/changes',sbJson);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkRest__lastErrorText(rest));
    Exit;
  end;

if (CkRest_getResponseStatusCode(rest) <> 200) then
  begin
    Memo1.Lines.Add('Received error response code: ' + IntToStr(CkRest_getResponseStatusCode(rest)));
    Memo1.Lines.Add('Response body:');
    Memo1.Lines.Add(CkStringBuilder__getAsString(sbJson));
    Exit;
  end;

json := CkJsonObject_Create();
CkJsonObject_LoadSb(json,sbJson);

//  The following code parses the JSON response.
//  A sample JSON response is shown below the sample code.

kind := CkJsonObject__stringOf(json,'kind');
newStartPageToken := CkJsonObject__stringOf(json,'newStartPageToken');
i := 0;
count_i := CkJsonObject_SizeOfArray(json,'changes');
while i < count_i do
  begin
CkJsonObject_putI(json,i);
    kind := CkJsonObject__stringOf(json,'changes[i].kind');
    type := CkJsonObject__stringOf(json,'changes[i].type');
    time := CkJsonObject__stringOf(json,'changes[i].time');
    removed := CkJsonObject_BoolOf(json,'changes[i].removed');
    fileId := CkJsonObject__stringOf(json,'changes[i].fileId');
    fileKind := CkJsonObject__stringOf(json,'changes[i].file.kind');
    fileId := CkJsonObject__stringOf(json,'changes[i].file.id');
    fileName := CkJsonObject__stringOf(json,'changes[i].file.name');
    fileMimeType := CkJsonObject__stringOf(json,'changes[i].file.mimeType');
    fileTeamDriveId := CkJsonObject__stringOf(json,'changes[i].file.teamDriveId');
    i := i + 1;
  end;

Memo1.Lines.Add('Example Completed.');

CkRest_Dispose(rest);
CkOAuth2_Dispose(oauth2);
CkStringBuilder_Dispose(sbJson);
CkJsonObject_Dispose(json);

Sample JSON Response Body

{
  "kind": "drive#changeList",
  "newStartPageToken": "16",
  "changes": [
    {
      "kind": "drive#change",
      "type": "file",
      "time": "2017-11-13T17:04:47.470Z",
      "removed": false,
      "fileId": "1lT4TbeSSMtxgB2MmwE7-5i7vQaxhr6Ze",
      "file": {
        "kind": "drive#file",
        "id": "1lT4TbeSSMtxgB2MmwE7-5i7vQaxhr6Ze",
        "name": "starfish2.jpg",
        "mimeType": "image/jpeg",
        "teamDriveId": "0AEd3EhGff2SaUk9PVA"
      }
    },
    {
      "kind": "drive#change",
      "type": "file",
      "time": "2017-11-13T17:05:01.095Z",
      "removed": false,
      "fileId": "16MsxSRSz6ISRx1D_PXyA5Sj6aNFSEd4e",
      "file": {
        "kind": "drive#file",
        "id": "16MsxSRSz6ISRx1D_PXyA5Sj6aNFSEd4e",
        "name": "seahorse.jpg",
        "mimeType": "image/jpeg",
        "teamDriveId": "0AEd3EhGff2SaUk9PVA"
      }
    }
  ]
}