https://cas.lehigh.edu/core/misc/progress.js?v=10.6.15

1/**
2 * @file
3 * Progress bar.
4 */
5
6(function ($, Drupal) {
7  /**
8   * Theme function for the progress bar.
9   *
10   * @param {string} id
11   *   The id for the progress bar.
12   *
13   * @return {string}
14   *   The HTML for the progress bar.
15   */
16  Drupal.theme.progressBar = function (id) {
17    const escapedId = Drupal.checkPlain(id);
18    return (
19      `<div id="${escapedId}" class="progress" aria-live="polite">` +
20      '<div class="progress__label">&nbsp;</div>' +
21      '<div class="progress__track"><div class="progress__bar"></div></div>' +
22      '<div class="progress__percentage"></div>' +
23      '<div class="progress__description">&nbsp;</div>' +
24      '</div>'
25    );
26  };
27
28  /**
29   * A progressbar object. Initialized with the given id. Must be inserted into
30   * the DOM afterwards through progressBar.element.
31   *
32   * Method is the function which will perform the HTTP request to get the
33   * progress bar state. Either "GET" or "POST".
34   *
35   * @example
36   * pb = new Drupal.ProgressBar('myProgressBar');
37   * some_element.appendChild(pb.element);
38   *
39   * @constructor
40   *
41   * @param {string} id
42   *   The id for the progressbar.
43   * @param {function} updateCallback
44   *   Callback to run on update.
45   * @param {string} method
46   *   HTTP method to use.
47   * @param {function} errorCallback
48   *   Callback to call on error.
49   */
50  Drupal.ProgressBar = function (id, updateCallback, method, errorCallback) {
51    this.id = id;
52    this.method = method || 'GET';
53    this.updateCallback = updateCallback;
54    this.errorCallback = errorCallback;
55
56    // The WAI-ARIA setting aria-live="polite" will announce changes after
57    // users
58    // have completed their current activity and not interrupt the screen
59    // reader.
60    this.element = $(Drupal.theme('progressBar', id));
61  };
62
63  $.extend(
64    Drupal.ProgressBar.prototype,
65    /** @lends Drupal.ProgressBar# */ {
66      /**
67       * Set the percentage and status message for the progressbar.
68       *
69       * @param {number} percentage
70       *   The progress percentage.
71       * @param {string} message
72       *   The message to show the user.
73       * @param {string} label
74       *   The text for the progressbar label.
75       */
76      setProgress(percentage, message, label) {
77        if (percentage >= 0 && percentage <= 100) {
78          $(this.element)
79            .find('div.progress__bar')
80            .each(function () {
81              this.style.width = `${percentage}%`;
82            });
83          $(this.element)
84            .find('div.progress__percentage')
85            .html(`${percentage}%`);
86        }
87        $('div.progress__description', this.element).html(message);
88        $('div.progress__label', this.element).html(label);
89        if (this.updateCallback) {
90          this.updateCallback(percentage, message, this);
91        }
92      },
93
94      /**
95       * Start monitoring progress via Ajax.
96       *
97       * @param {string} uri
98       *   The URI to use for monitoring.
99       * @param {number} delay
100       *   The delay for calling the monitoring URI.
101       */
102      startMonitoring(uri, delay) {
103        this.delay = delay;
104        this.uri = uri;
105        this.sendPing();
106      },
107
108      /**
109       * Stop monitoring progress via Ajax.
110       */
111      stopMonitoring() {
112        clearTimeout(this.timer);
113        // This allows monitoring to be stopped from within the callback.
114        this.uri = null;
115      },
116
117      /**
118       * Request progress data from server.
119       */
120      sendPing() {
121        if (this.timer) {
122          clearTimeout(this.timer);
123        }
124        if (this.uri) {
125          const pb = this;
126          // When doing a post request, you need non-null data. Otherwise a
127          // HTTP 411 or HTTP 406 (with Apache mod_security) error may result.
128          let uri = this.uri;
129          if (!uri.includes('?')) {
130            uri += '?';
131          } else {
132            uri += '&';
133          }
134          uri += '_format=json';
135          $.ajax({
136            type: this.method,
137            url: uri,
138            data: '',
139            dataType: 'json',
140            success(progress) {
141              // Display errors.
142              if (progress.status === 0) {
143                pb.displayError(progress.data);
144                return;
145              }
146              // Update display.
147              pb.setProgress(
148                progress.percentage,
149                progress.message,
150                progress.label,
151              );
152              // Schedule next timer.

153              pb.timer = setTimeout(() => {
154                pb.sendPing();
155              }, pb.delay);
156            },
157            error(xmlhttp) {
158              const e = new Drupal.AjaxError(xmlhttp, pb.uri);
159              pb.displayError(`<pre>${e.message}</pre>`);
160            },
161          });
162        }
163      },
164
165      /**
166       * Display errors on the page.
167       *
168       * @param {string} string
169       *   The error message to show the user.
170       */
171      displayError(string) {
172        const error = $('<div class="messages messages--error"></div>').html(
173          string,
174        );
175        $(this.element).before(error).hide();
176
177        if (this.errorCallback) {
178          this.errorCallback(this);
179        }
180      },
181    },
182  );
183})(jQuery, Drupal);