https://www.karnatakabank.bank.in/modules/custom/captcha_audio/js/captcha-audio.js?v=1.x

1/**
2 * @file
3 * Plays Image CAPTCHA characters via the Web Speech API.
4 *
5 * Speaks values like: "capital A, small b, number 3".
6 */
7
8(function ($, Drupal, once) {
9  "use strict";
10
11  const getCaptchaForm = ($el) => $el.closest("form");
12
13  const getSessionData = ($form) => ({
14    sid: String($form.find('input[name="captcha_sid"]').val() || ""),
15    token: String($form.find('input[name="captcha_token"]').val() || ""),
16  });
17
18  const buildSpeakUrl = (button, sid) => {
19    const template =
20      button.getAttribute("data-audio-url-template") ||
21      "/captcha-audio/123456789";
22    return template.replace("123456789", encodeURIComponent(sid));
23  };
24
25  const speakText = (text) => {
26    if (
27      !window.speechSynthesis ||
28      typeof window.SpeechSynthesisUtterance === "undefined"
29    ) {
30      return false;
31    }
32
33    window.speechSynthesis.cancel();
34    const utterance = new window.SpeechSynthesisUtterance(text);
35    utterance.rate = 0.85;
36    utterance.pitch = 1;
37    utterance.lang = document.documentElement.lang || "en-IN";
38    window.speechSynthesis.speak(utterance);
39    return true;
40  };
41
42  Drupal.behaviors.captchaAudioPlay = {
43    attach: function (context) {
44      once("captcha-audio-play", ".captcha-audio-play", context).forEach(
45        function (button) {
46          const $button = $(button);
47
48          $button.on("click", function (event) {
49            event.preventDefault();
50
51            const $form = getCaptchaForm($button);
52            const session = getSessionData($form);
53
54            if (!session.sid || !session.token) {
55              window.alert(
56                Drupal.t("CAPTCHA audio is not available right now.")
57              );
58              return;
59            }
60
61            if (!window.speechSynthesis) {
62              window.alert(
63                Drupal.t(
64                  "Audio playback is not supported in this browser. Please enter the characters you see in the image."
65                )
66              );
67              return;
68            }
69
70            $button.prop("disabled", true).attr("aria-busy", "true");
71
72            const url =
73              buildSpeakUrl(button, session.sid) +
74              "?token=" +
75              encodeURIComponent(session.token);
76
77            $.getJSON(url)
78              .done(function (response) {
79                if (!response || response.status !== 1 || !response.speech) {
80                  window.alert(
81                    (response && response.message) ||
82                      Drupal.t("Unable to play CAPTCHA audio.")
83                  );
84                  return;
85                }
86
87                if (!speakText(response.speech)) {
88                  window.alert(
89                    Drupal.t(
90                      "Audio playback is not supported in this browser. Please enter the characters you see in the image."
91                    )
92                  );
93                }
94              })
95              .fail(function () {
96                window.alert(Drupal.t("Unable to play CAPTCHA audio."));
97              })
98              .always(function () {
99                $button.prop("disabled", false).removeAttr("aria-busy");
100              });
101          });
102        }
103      );
104    },
105  };
106})(jQuery, Drupal, once);