/** * @file * Progress bar. */ (function ($, Drupal) { /** * Theme function for the progress bar. * * @param {string} id * The id for the progress bar. * * @return {string} * The HTML for the progress bar. */ Drupal.theme.progressBar = function (id) { return `
` + '
 
' + '
' + '
' + '
 
' + '
'; }; /** * A progressbar object. Initialized with the given id. Must be inserted into * the DOM afterwards through progressBar.element. * * Method is the function which will perform the HTTP request to get the * progress bar state. Either "GET" or "POST". * * @example * pb = new Drupal.ProgressBar('myProgressBar'); * some_element.appendChild(pb.element); * * @constructor * * @param {string} id * The id for the progressbar. * @param {function} updateCallback * Callback to run on update. * @param {string} method * HTTP method to use. * @param {function} errorCallback * Callback to call on error. */ Drupal.ProgressBar = function (id, updateCallback, method, errorCallback) { this.id = id; this.method = method || 'GET'; this.updateCallback = updateCallback; this.errorCallback = errorCallback; // The WAI-ARIA setting aria-live="polite" will announce changes after // users // have completed their current activity and not interrupt the screen // reader. this.element = $(Drupal.theme('progressBar', id)); }; $.extend(Drupal.ProgressBar.prototype, /** @lends Drupal.ProgressBar# */{ /** * Set the percentage and status message for the progressbar. * * @param {number} percentage * The progress percentage. * @param {string} message * The message to show the user. * @param {string} label * The text for the progressbar label. */ setProgress(percentage, message, label) { if (percentage >= 0 && percentage <= 100) { $(this.element).find('div.progress__bar').css('width', `${percentage}%`); $(this.element).find('div.progress__percentage').html(`${percentage}%`); } $('div.progress__description', this.element).html(message); $('div.progress__label', this.element).html(label); if (this.updateCallback) { this.updateCallback(percentage, message, this); } }, /** * Start monitoring progress via Ajax. * * @param {string} uri * The URI to use for monitoring. * @param {number} delay * The delay for calling the monitoring URI. */ startMonitoring(uri, delay) { this.delay = delay; this.uri = uri; this.sendPing(); }, /** * Stop monitoring progress via Ajax. */ stopMonitoring() { clearTimeout(this.timer); // This allows monitoring to be stopped from within the callback. this.uri = null; }, /** * Request progress data from server. */ sendPing() { if (this.timer) { clearTimeout(this.timer); } if (this.uri) { const pb = this; // When doing a post request, you need non-null data. Otherwise a // HTTP 411 or HTTP 406 (with Apache mod_security) error may result. let uri = this.uri; if (uri.indexOf('?') === -1) { uri += '?'; } else { uri += '&'; } uri += '_format=json'; $.ajax({ type: this.method, url: uri, data: '', dataType: 'json', success(progress) { // Display errors. if (progress.status === 0) { pb.displayError(progress.data); return; } // Update display. pb.setProgress(progress.percentage, progress.message, progress.label); // Schedule next timer. pb.timer = setTimeout(() => { pb.sendPing(); }, pb.delay); }, error(xmlhttp) { const e = new Drupal.AjaxError(xmlhttp, pb.uri); pb.displayError(`
${e.message}
`); }, }); } }, /** * Display errors on the page. * * @param {string} string * The error message to show the user. */ displayError(string) { const error = $('
').html(string); $(this.element).before(error).hide(); if (this.errorCallback) { this.errorCallback(this); } }, }); }(jQuery, Drupal));