Node.js
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.
Chilkat Node.js Downloads

Download Chilkat for Node.js
Node.js
NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

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

    var http = new chilkat.Http();

    // 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 chilkat.StringBuilder();

    // 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 chilkat.JsonObject();
    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 chilkat.Hashtable();
    var sbMap = new chilkat.StringBuilder();
    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..

}

chilkatExample();