Dart
Outlook -- List Mail Folders

Uses the Microsoft Graph API to list Outlook mail folders.
Note: This example requires Chilkat v9.5.0.67 or greater.
Chilkat Dart Downloads

Dart
import 'package:chilkat/chilkat.dart';

void main() {
  var success = false;

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

  final http = CkHttp();

  // Use your previously obtained access token here:
  // See the following examples for getting an access token:
  //    Get Microsoft Graph OAuth2 Access Token (Azure AD v2.0 Endpoint).
  //    Get Microsoft Graph OAuth2 Access Token (Azure AD Endpoint).
  //    Refresh Access Token (Azure AD v2.0 Endpoint).
  //    Refresh Access Token (Azure AD Endpoint).

  http.authToken = 'MICROSOFT_GRAPH_ACCESS_TOKEN';

  final sbResponse = CkStringBuilder();

  // Sends:  GET /users/{id | userPrincipalName}/mailFolders
  // Note: It is also possible to use the literal string "me" for the current logged-on user.
  // For example: GET /me/mailFolders
  http.clearUrlVars();
  http.setUrlVar('userPrincipalName', 'chilkatsoft@outlook.com');
  success = true;
  try {
    http.quickGetSb('https://graph.microsoft.com/v1.0/users/{\$userPrincipalName}/mailFolders', sbResponse);
  } on ChilkatException {
    success = false;
  }
  if ((!success) && (http.lastStatus == 0)) {
    print(http.lastErrorText);
    return;
  }

  final json = CkJsonObject();
  json.loadSb(sbResponse);
  json.emitCompact = false;

  print('Status code = ${http.lastStatus}');
  if (http.lastStatus != 200) {
    print(json.emit());
    print('Failed.');
  }

  print(json.emit());
  print('----');

  // In my test case, this is the result (see below)
  // Apparently, this lists folders without listing subfolders (aka child folders)
  // There's another REST API call to list child folders.

  // To iterate over the folders:
  var i = 0;
  final numFolders = json.sizeOfArray('value');
  while (i < numFolders) {
    json.i = i;
    print(json.stringOf('value[i].displayName'));
    i++;
  }

  // The output from the above loop:

  // 	Archive
  // 	Deleted Items
  // 	Drafts
  // 	Inbox
  // 	Junk Email
  // 	Outbox
  // 	Sent Items

  // ------------------------------------------------------------------------------------
  // The raw JSON response: 

  // {
  //   "@odata.context": "https://graph.microsoft.com/v1.0/$metadata#users('chilkatsoft%40outlook.com')/mailFolders",
  //   "value": [
  //     {
  //       "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAG8XunwAAAA=",
  //       "displayName": "Archive",
  //       "parentFolderId": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEIAAAA",
  //       "childFolderCount": 0,
  //       "unreadItemCount": 0,
  //       "totalItemCount": 0
  //     },
  //     {
  //       "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEKAAAA",
  //       "displayName": "Deleted Items",
  //       "parentFolderId": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEIAAAA",
  //       "childFolderCount": 0,
  //       "unreadItemCount": 0,
  //       "totalItemCount": 0
  //     },
  //     {
  //       "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEPAAAA",
  //       "displayName": "Drafts",
  //       "parentFolderId": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEIAAAA",
  //       "childFolderCount": 0,
  //       "unreadItemCount": 0,
  //       "totalItemCount": 0
  //     },
  //     {
  //       "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEMAAAA",
  //       "displayName": "Inbox",
  //       "parentFolderId": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEIAAAA",
  //       "childFolderCount": 2,
  //       "unreadItemCount": 0,
  //       "totalItemCount": 4
  //     },
  //     {
  //       "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEiAAAA",
  //       "displayName": "Junk Email",
  //       "parentFolderId": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEIAAAA",
  //       "childFolderCount": 0,
  //       "unreadItemCount": 0,
  //       "totalItemCount": 0
  //     },
  //     {
  //       "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgELAAAA",
  //       "displayName": "Outbox",
  //       "parentFolderId": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEIAAAA",
  //       "childFolderCount": 0,
  //       "unreadItemCount": 0,
  //       "totalItemCount": 0
  //     },
  //     {
  //       "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEJAAAA",
  //       "displayName": "Sent Items",
  //       "parentFolderId": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEIAAAA",
  //       "childFolderCount": 0,
  //       "unreadItemCount": 0,
  //       "totalItemCount": 14
  //     }
  //   ]
  // }
  // 

  // ------------------------------------------------------------------------------------------------------
  // This example applies to: Exchange Online | Office 365 | Hotmail.com | Live.com | MSN.com | Outlook.com | Passport.com
  // 
  // The Microsoft Graph Outlook Mail API lets you read, create, and send messages and attachments, 
  // view and respond to event messages, and manage folders that are secured by Azure Active Directory 
  // in Office 365. It also provides the same functionality in Microsoft accounts specifically 
  // in these domains: Hotmail.com, Live.com, MSN.com, Outlook.com, and Passport.com.
}