(JavaScript) Outlook -- Get Number of Emails

Gets the number of emails in an Outlook folder. This uses the OData $count system query option. See OData System Query Option $count for general information.

This example first gets the combined total number of messages across all folders.

Note: This example requires Chilkat v9.5.0.68 or greater.

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

var success = false;

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

var http = new 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";

var sbResponse = new CkStringBuilder();

// This gets the combined total number of emails in all folders.
success = http.QuickGetSb("https://graph.microsoft.com/v1.0/me/messages/$count",sbResponse);
if ((success !== true) && (http.LastStatus == 0)) {
    console.log(http.LastErrorText);
    return;
}

var json = new CkJsonObject();
json.EmitCompact = false;

// If the status code was not 200, then it failed and the response is likely JSON:
if (http.LastStatus !== 200) {
    console.log("Status code = " + http.LastStatus);
    json.LoadSb(sbResponse);
    console.log(json.Emit());
    console.log("Failed.");
    return;
}

// A success response payload contains just the integer value (it is not JSON)
console.log("Combined Total Number of Emails = " + sbResponse.GetAsString());
console.log("--");

// ---------------------------------------------------------------------------
// To get the number of emails in a particular folder, we need to use the folder id.
// 

// In this example, we'd like to get number of messages in the folder "/Inbox/abc",
// but we must specify the corresponding folder_id.  The best way to do this is to create
// a local map of folderPaths-to-folderIds.
// We'll use the map created by this example:  Create Outlook Folder Map)
var htFolderMap = new CkHashtable();
var sbMap = new CkStringBuilder();
sbMap.LoadFile("qa_data/outlook/folderMap.xml","utf-8");
htFolderMap.AddFromXmlSb(sbMap);

// Get the ID for the "/Inbox/abc" folder:
var folderId = htFolderMap.LookupStr("/Inbox/abc");
if (htFolderMap.LastMethodSuccess !== true) {
    console.log("Folder ID not found");
    return;
}

http.SetUrlVar("folder_id",folderId);

// Send the request get the folder information.
// In this case we are NOT using the $count system query option.
success = http.QuickGetSb("https://graph.microsoft.com/v1.0/me/mailFolders/{$folder_id}",sbResponse);
if ((success !== true) && (http.LastStatus == 0)) {
    console.log(http.LastErrorText);
    return;
}

json.LoadSb(sbResponse);
console.log(json.Emit());
console.log("--");

if (http.LastStatus !== 200) {
    console.log("Status code = " + http.LastStatus);
    console.log("Failed.");
    return;
}

// The successful JSON response looks like this;

// 	{
// 	  "@odata.context": "https://graph.microsoft.com/v1.0/$metadata#users('me')/mailFolders/$entity",
// 	  "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAL8huv8AAAA=",
// 	  "displayName": "abc",
// 	  "parentFolderId": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEMAAAA",
// 	  "childFolderCount": 2,
// 	  "unreadItemCount": 0,
// 	  "totalItemCount": 3
// 	}
// 

// Get the integer value from the JSON like this:
var totalItemCount = json.IntOf("totalItemCount");
console.log("totalItemCount = " + totalItemCount);

var childFolderCount = json.IntOf("childFolderCount");
console.log("childFolderCount = " + childFolderCount);

// etc..