(Node.js) Paging User Photos with Cursor

Demonstrates how to iterate over the pages of user photos using a cursor.

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

    // 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
    var oauth2 = new chilkat.OAuth2();
    oauth2.AccessToken = "FACEBOOK-ACCESS-TOKEN";

    var rest = new chilkat.Rest();

    // Connect to Facebook.
    var success = rest.Connect("graph.facebook.com",443,true,true);
    if (success !== true) {
        console.log(rest.LastErrorText);
        return;
    }

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

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

    // We could limit the number of photos per page using the "limit" field.
    rest.AddQueryParam("limit","20");

    // Get 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.
    var responseJson = rest.FullRequestNoBody("GET","/v2.7/me/photos");
    if (rest.LastMethodSuccess !== true) {
        console.log(rest.LastErrorText);
        return;
    }

    var json = new chilkat.JsonObject();
    json.EmitCompact = false;
    json.Load(responseJson);
    console.log(json.Emit());

    // 
    // See Parsing the Facebook User Photos for code showing how to parse the JSON photos content.
    // 

    // Get the "after" cursor.
    var afterCursor = json.StringOf("paging.cursors.after");
    while (json.LastMethodSuccess == true) {

        console.log("after cursor: " + afterCursor);

        // Prepare for getting the next page of photos.
        // We can continue using the same REST object.
        // If already connected, we'll continue using the existing connection.
        // Otherwise, a new connection will automatically be made if needed.
        rest.ClearAllQueryParams();
        rest.AddQueryParam("type","uploaded");
        rest.AddQueryParam("limit","20");
        rest.AddQueryParam("after",afterCursor);

        responseJson = rest.FullRequestNoBody("GET","/v2.7/me/photos");
        if (rest.LastMethodSuccess !== true) {
            console.log(rest.LastErrorText);
            return;
        }

        json.Load(responseJson);
        // See Parsing the Facebook User Photos for code showing how to parse the JSON photos content.

        console.log(json.Emit());

        // Get the cursor for the next page.
        afterCursor = json.StringOf("paging.cursors.after");
    }

    console.log("No more pages of photos.");

}

chilkatExample();