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✏️ Editing: videomodule.js

// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
//

/**
 * Atto recordrtc library functions
 *
 * @package    atto_recordrtc
 * @author     Jesus Federico (jesus [at] blindsidenetworks [dt] com)
 * @author     Jacob Prud'homme (jacob [dt] prudhomme [at] blindsidenetworks [dt] com)
 * @copyright  2017 Blindside Networks Inc.
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

// ESLint directives.
/* eslint-disable camelcase, spaced-comment */

// Scrutinizer CI directives.
/** global: M */
/** global: Y */

M.atto_recordrtc = M.atto_recordrtc || {};

// Shorten access to module namespaces.
var cm = M.atto_recordrtc.commonmodule,
    am = M.atto_recordrtc.abstractmodule,
    ccm = M.atto_recordrtc.compatcheckmodule;

M.atto_recordrtc.videomodule = {
    init: function(scope) {
        // Assignment of global variables.
        cm.editorScope = scope; // Allows access to the editor's "this" context.
        cm.alertWarning = Y.one('div#alert-warning');
        cm.alertDanger = Y.one('div#alert-danger');
        cm.player = Y.one('video#player');
        cm.playerDOM = document.querySelector('video#player');
        cm.startStopBtn = Y.one('button#start-stop');
        cm.uploadBtn = Y.one('button#upload');
        cm.recType = 'video';
        cm.maxUploadSize = scope.get('maxrecsize');

// Show alert and close plugin if WebRTC is not supported.
        ccm.check_has_gum();
        // Show alert and redirect user if connection is not secure.
        ccm.check_secure();

// Run when user clicks on "record" button.
        cm.startStopBtn.on('click', function() {
            cm.startStopBtn.set('disabled', true);

// If button is displaying "Start Recording" or "Record Again".
            if ((cm.startStopBtn.get('textContent') === M.util.get_string('startrecording', 'atto_recordrtc')) ||
                (cm.startStopBtn.get('textContent') === M.util.get_string('recordagain', 'atto_recordrtc')) ||
                (cm.startStopBtn.get('textContent') === M.util.get_string('recordingfailed', 'atto_recordrtc'))) {
                // Make sure the upload button is not shown.
                cm.uploadBtn.ancestor().ancestor().addClass('hide');

// Change look of recording button.
                cm.startStopBtn.replaceClass('btn-outline-danger', 'btn-danger');

// Empty the array containing the previously recorded chunks.
                cm.chunks = [];
                cm.blobSize = 0;
                cm.uploadBtn.detach('click');

// Initialize common configurations.
                var commonConfig = {
                    // When the stream is captured from the microphone/webcam.
                    onMediaCaptured: function(stream) {
                        // Make video stream available at a higher level by making it a property of the common module.
                        cm.stream = stream;

cm.start_recording(cm.recType, cm.stream);
                    },

// Revert button to "Record Again" when recording is stopped.
                    onMediaStopped: function(btnLabel) {
                        cm.startStopBtn.set('textContent', btnLabel);
                        cm.startStopBtn.set('disabled', false);
                        cm.startStopBtn.replaceClass('btn-danger', 'btn-outline-danger');
                    },

// Handle recording errors.
                    onMediaCapturingFailed: function(error) {
                        am.handle_gum_errors(error, commonConfig);
                    }
                };

// Show video tag without controls to view webcam stream.
                cm.player.ancestor().ancestor().removeClass('hide');
                cm.player.set('controls', false);

// Capture audio+video stream from webcam/microphone.
                M.atto_recordrtc.videomodule.capture_audio_video(commonConfig);
            } else { // If button is displaying "Stop Recording".
                // First of all clears the countdownTicker.
                window.clearInterval(cm.countdownTicker);

// Disable "Record Again" button for 1s to allow background processing (closing streams).
                window.setTimeout(function() {
                    cm.startStopBtn.set('disabled', false);
                }, 1000);

// Stop recording.
                cm.stop_recording(cm.stream);

// Change button to offer to record again.
                cm.startStopBtn.set('textContent', M.util.get_string('recordagain', 'atto_recordrtc'));
                cm.startStopBtn.replaceClass('btn-danger', 'btn-outline-danger');
            }

// Get dialogue centered.
            cm.editorScope.getDialogue().centered();
        });
    },

// Setup to get audio+video stream from microphone/webcam.
    capture_audio_video: function(config) {
        cm.capture_user_media(
            // Media constraints.
            {
                audio: true,
                video: {
                    width: {ideal: 640},
                    height: {ideal: 480}
                }
            },

// Success callback.
            function(audioVideoStream) {
                // Set video player source to microphone+webcam stream, and play it back as it's recording.
                cm.playerDOM.srcObject = audioVideoStream;
                cm.playerDOM.play();

config.onMediaCaptured(audioVideoStream);
            },

// Error callback.
            function(error) {
                config.onMediaCapturingFailed(error);
            }
        );
    }
};

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