AJAX invisible recaptcha for uestla/recaptchacontrol

recaptcha.invisible.ajax.js

/**
 * This file is part of the ReCaptchaControl package
 * 
 * !!! needs polyfill for FormData in IE11 and Edge !!!
 * https://github.com/jimmywarting/FormData
 *
 * @license  MIT
 * @author   Petr Kessler (https://kesspess.cz)
 * @link     https://github.com/uestla/ReCaptchaControl
 */

;
(function (window, $) {

	if (!$ || typeof $.nette === 'undefined') {
		console.error('nette.ajax.js library is required, please load it.');
	}

	var clientIDs = {};

	// renders all recaptcha elements on page
	var renderAll = function () {
		$('.g-recaptcha').each(function () {
			var el = $(this);
			
			if (el.children().length) { // already rendered -> skip
				return;
			}

			clientIDs[this.id] = grecaptcha.render(this, {
				size: 'invisible',
				badge: 'inline',
				callback: function (token) {
					el.closest('form').off('submit.recaptcha').trigger('submit');
				}
			}, true);
		});

		$(function () {
			$('form').on('submit.recaptcha', function (event) {
				event.preventDefault();
				var form = $(this);
				if (Nette.validateForm(this, true)) {
					// execute only reCAPTCHAs in submitted form
					$('.g-recaptcha', form).each(function () {
						grecaptcha.execute(clientIDs[this.id]);
					});
				}
			});
		});
	};

	// set global onload callback (used in library loading below)
	var callbackName = 'g_onRecaptchaLoad';

	window[callbackName] = function () {
		renderAll();
		$.nette.ext('recaptcha', {
			load: function () {
				renderAll();
			},
			before: function (jqXHR, settings) {
                		if ((settings.hasOwnProperty('data')) && (settings.data instanceof FormData)) {
					var formData = settings.data;
					var formDataKeys = formData.keys();
					var iterationDone = false;
					var formDataKeysArray = [];
					while (!iterationDone) {
						try {
							var keyItem = formDataKeys.next();
							iterationDone = keyItem.done;
							if (!iterationDone) {
								formDataKeysArray.push(keyItem.value);
							}
						} catch (error) {
							iterationDone = true
						}
					}
					for (var index in formDataKeysArray) {
						if (formDataKeysArray[index] === 'g-recaptcha-response') {
							var formDataValue = formData.get(formDataKeysArray[index]);
							if (formDataValue === '' || formDataValue === undefined) {
								var formEl = settings.nette.form;
								formEl.trigger('submit.recaptcha')
								return false;
							}
						}
					}
				}
			},
			complete: function () {
				renderAll();
			}
		});
	};

	// load official library with explicit rendering
	$('<script />', {
		src: 'https://www.google.com/recaptcha/api.js'
				+ '?onload=' + callbackName
				+ '&render=explicit'
				+ '&hl=' + ($('html').attr('lang') || 'en'),
		async: true,
		defer: true
	}).insertAfter('script:last');

})(window, window.jQuery || false);

Další fix!! FormData nemá podporu v IE 11 a Edge. Musí se polyfillovat: https://github.com/jimmywarting/FormData

https://gist.github.com/tvaliasek/83a166e5c773cece3b5c7d49a964e030#file-recaptcha-invisible-ajax-js-L37 form.reCaptcha aby se to nevázalo na každý formulář.

Diky, kdyby nekdo chtel aby fungovalo i pro nove nactene formy napr. po nacteni snippetu, tak do $.nette.ext('recaptcha')... pridejte

init: function () {
  this.ext('snippets', true).after($.proxy(function ($el) {
	  renderAll();
  }, this));
},