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@vogelbeere
Created April 13, 2018 14:05
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Authenticate with Moodle from a mobile app using jQuery
My mobile app needs to log in to Moodle to get Json data from a webservice and display it using Angular.
In order to do that, I need to pass in a username and password and get a Moodle webservice token back, so my app doesn't need to log in again (at least until the token expires).
//Step 1. Check if a token already exists
jQuery(document).ready(function () {
/* when the user clicks log-out button, destroy the session */
$('#btn_logout').on('click', function () {
$('.pane').hide(); /* hide all screens */
$('#menu').toggleClass('ui-panel-open ui-panel-closed');
$.jStorage.deleteKey('session');
makeUserLogin();
});
var session = $.jStorage.get('session', ''); // syntax: $.jStorage.get(keyname, "default value")
if (session) { // if there is already a session, redirect to landing pane
showApp();
} else { // if there is no session *then* redirect to the login pane
makeUserLogin();
}
});
//Step 2. create functions to show app & redirect to login page
function showApp() {
$('#home-pane').show(); /* show home screen */
$('#system-message').hide();
$('#login-pane').hide(); /* hide login screen*/
$('#menu_btn').removeClass('hidden'); /* show menu button so user can see rest of app */
}
function makeUserLogin() {
$('#btn_login').click(function () {
console.log('click event for login_button');
var username = $('#username').val();
var password = $('#password').val();
postCredentials(username, password, createSession);
});
$('#menu_btn').addClass('hidden'); /* hide menu button so user cannot see rest of app */
$('#home-pane').hide(); /* hide home screen */
$('#login-pane').show(); /* show login screen */
}
function postCredentials(username, password, callback) {
if ((username.length && password.length) && (username !== '' && password !='')) {
var url = 'https://moodle.yourcompany.com/local/login/token.php';
$.post(url, {
username: username,
password: password,
service: 'webservice_ws' // your webservice name
}).done(function (data) {
token = data.token;
dataString = JSON.stringify(data);
if (dataString.indexOf('error') > 0) {
showErrorDialog('<p class="error">Invalid user credentials, please try again</p>');
}
else {
createSession(token);
}
}).fail(function () {
showErrorDialog('<p class="error">Login failed</p>');
});
} else {
showErrorDialog('<p class="error">Please enter a username and password</p>');
}
}
function createSession(token) {
// syntax: $.jStorage.set('keyname', 'keyvalue', {TTL: milliseconds}); // {TTL... is optional time, in milliseconds, until key/value pair expires}
$.jStorage.set('session', token, { TTL: 28800000 });
// redirect to whatever page you need after a successful login
showApp();
}
function showErrorDialog(errorMsg) {
$('#system-message').html(errorMsg);
$('#system-message').fadeIn();
}
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