Sindbad~EG File Manager
// 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/>.
//
/**
* Tiny Record RTC type.
*
* @module tiny_recordrtc/base_recorder
* @copyright 2022 Stevani Andolo <stevani@hotmail.com.au>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
import {get_string as getString, get_strings as getStrings} from 'core/str';
import {component} from './common';
import Pending from 'core/pending';
import {getData} from './options';
import uploadFile from 'editor_tiny/uploader';
import {add as addToast} from 'core/toast';
import * as ModalEvents from 'core/modal_events';
import * as ModalFactory from 'core/modal_factory';
import * as Templates from 'core/templates';
import {saveCancelPromise} from 'core/notification';
import {prefetchStrings, prefetchTemplates} from 'core/prefetch';
/**
* The RecordRTC base class for audio, video, and any other future types
*/
export default class {
stopRequested = false;
/**
* Constructor for the RecordRTC class
*
* @param {TinyMCE} editor The Editor to which the content will be inserted
* @param {Modal} modal The Moodle Modal that contains the interface used for recording
*/
constructor(editor, modal) {
this.ready = false;
if (!this.checkAndWarnAboutBrowserCompatibility()) {
return;
}
this.editor = editor;
this.config = getData(editor).params;
this.modal = modal;
this.modalRoot = modal.getRoot()[0];
this.startStopButton = this.modalRoot.querySelector('button[data-action="startstop"]');
this.uploadButton = this.modalRoot.querySelector('button[data-action="upload"]');
// Disable the record button untilt he stream is acquired.
this.setRecordButtonState(false);
this.player = this.configurePlayer();
this.registerEventListeners();
this.ready = true;
this.captureUserMedia();
this.prefetchContent();
}
/**
* Check whether the browser is compatible.
*
* @returns {boolean}
*/
isReady() {
return this.ready;
}
// Disable eslint's valid-jsdoc rule as the following methods are abstract and mnust be overridden by the child class.
/* eslint-disable valid-jsdoc, no-unused-vars */
/**
* Get the Player element for this type.
*
* @returns {HTMLElement} The player element, typically an audio or video tag.
*/
configurePlayer() {
throw new Error(`configurePlayer() must be implemented in ${this.constructor.name}`);
}
/**
* Get the list of supported mimetypes for this recorder.
* @see {@link https://developer.mozilla.org/en-US/docs/Web/API/MediaRecorder/isTypeSupported}
*
* @returns {string[]} The list of supported mimetypes.
*/
getSupportedTypes() {
throw new Error(`getSupportedTypes() must be implemented in ${this.constructor.name}`);
}
/**
* Get any recording options passed into the MediaRecorder.
* Please note that the mimeType will be fetched from {@link getSupportedTypes()}.
*
* @see {@link https://developer.mozilla.org/en-US/docs/Web/API/MediaRecorder/MediaRecorder#options}
* @returns {Object}
*/
getRecordingOptions() {
throw new Error(`getRecordingOptions() must be implemented in ${this.constructor.name}`);
}
/**
* Get a filename for the generated file.
*
* Typically this function will take a prefix and add a type-specific suffix such as the extension to it.
*
* @param {string} prefix The prefix for the filename generated by the recorder.
* @returns {string}
*/
getFileName(prefix) {
throw new Error(`getFileName() must be implemented in ${this.constructor.name}`);
}
/**
* Get a list of constraints as required by the getUserMedia() function.
* @see {@link https://developer.mozilla.org/en-US/docs/Web/API/MediaDevices/getUserMedia#constraints}
*
* @returns {Object}
*/
getMediaConstraints() {
throw new Error(`getMediaConstraints() must be implemented in ${this.constructor.name}`);
}
/**
* Whether to start playing the recording as it is captured.
* @returns {boolean} Whether to start playing the recording as it is captured.
*/
playOnCapture() {
return false;
}
/**
* Get the time limit for this recording type.
*
* @returns {number} The time limit in seconds.
*/
getTimeLimit() {
throw new Error(`getTimeLimit() must be implemented in ${this.constructor.name}`);
}
/**
* Get the name of the template used when embedding the URL in the editor content.
*
* @returns {string}
*/
getEmbedTemplateName() {
throw new Error(`getEmbedTemplateName() must be implemented in ${this.constructor.name}`);
}
/**
* Fetch the Class of the Modal to be displayed.
*
* @returns {Modal}
*/
static getModalClass() {
throw new Error(`getModalClass() must be implemented in ${this.constructor.name}`);
}
/* eslint-enable valid-jsdoc, no-unused-vars */
/**
* Get the options for the MediaRecorder.
*
* @returns {object} The options for the MediaRecorder instance.
*/
getParsedRecordingOptions() {
const requestedTypes = this.getSupportedTypes();
const possibleTypes = requestedTypes.reduce((result, type) => {
result.push(type);
// Safari seems to use codecs: instead of codecs=.
// It is safe to add both, so we do, but we want them to remain in order.
result.push(type.replace('=', ':'));
return result;
}, []);
const compatTypes = possibleTypes.filter((type) => window.MediaRecorder.isTypeSupported(type));
const options = this.getRecordingOptions();
if (compatTypes.length !== 0) {
options.mimeType = compatTypes[0];
}
window.console.info(
`Selected codec ${options.mimeType} from ${compatTypes.length} options.`,
compatTypes,
);
return options;
}
/**
* Start capturing the User Media and handle success or failure of the capture.
*/
async captureUserMedia() {
try {
const stream = await navigator.mediaDevices.getUserMedia(this.getMediaConstraints());
this.handleCaptureSuccess(stream);
} catch (error) {
this.handleCaptureFailure(error);
}
}
/**
* Prefetch some of the content that will be used in the UI.
*
* Note: not all of the strings used are pre-fetched.
* Some of the strings will be fetched because their template is used.
*/
prefetchContent() {
prefetchStrings(component, [
'uploading',
'recordagain_title',
'recordagain_desc',
'discard_title',
'discard_desc',
'confirm_yes',
'recordinguploaded',
'maxfilesizehit',
'maxfilesizehit_title',
'uploadfailed',
]);
prefetchTemplates([
this.getEmbedTemplateName(),
'tiny_recordrtc/timeremaining',
]);
}
/**
* Display an error message to the user.
*
* @param {Promise<string>} title The error title
* @param {Promise<string>} content The error message
* @returns {Promise<Modal>}
*/
async displayAlert(title, content) {
const pendingPromise = new Pending('core/confirm:alert');
const ModalFactory = await import('core/modal_factory');
const modal = await ModalFactory.create({
type: ModalFactory.types.ALERT,
title: title,
body: content,
removeOnClose: true,
});
modal.show();
pendingPromise.resolve();
return modal;
}
/**
* Handle successful capture of the User Media.
*
* @param {MediaStream} stream The stream as captured by the User Media.
*/
handleCaptureSuccess(stream) {
// Set audio player source to microphone stream.
this.player.srcObject = stream;
if (this.playOnCapture()) {
// Mute audio, distracting while recording.
this.player.muted = true;
this.player.play();
}
this.stream = stream;
this.setupPlayerSource();
this.setRecordButtonState(true);
}
/**
* Setup the player to use the stream as a source.
*/
setupPlayerSource() {
if (!this.player.srcObject) {
this.player.srcObject = this.stream;
// Mute audio, distracting while recording.
this.player.muted = true;
this.player.play();
}
}
/**
* Enable the record button.
*
* @param {boolean|null} enabled Set the button state
*/
setRecordButtonState(enabled) {
this.startStopButton.disabled = !enabled;
}
/**
* Configure button visibility for the record button.
*
* @param {boolean} visible Set the visibility of the button.
*/
setRecordButtonVisibility(visible) {
const container = this.getButtonContainer('start-stop');
container.classList.toggle('hide', !visible);
}
/**
* Enable the upload button.
*
* @param {boolean|null} enabled Set the button state
*/
setUploadButtonState(enabled) {
this.uploadButton.disabled = !enabled;
}
/**
* Configure button visibility for the upload button.
*
* @param {boolean} visible Set the visibility of the button.
*/
setUploadButtonVisibility(visible) {
const container = this.getButtonContainer('upload');
container.classList.toggle('hide', !visible);
}
/**
* Handle failure to capture the User Media.
*
* @param {Error} error
*/
handleCaptureFailure(error) {
// Changes 'CertainError' -> 'gumcertain' to match language string names.
var subject = `gum${error.name.replace('Error', '').toLowerCase()}`;
this.displayAlert(
getString(`${subject}_title`, component),
getString(subject, component)
);
}
/**
* Close the modal and stop recording.
*/
close() {
// Closing the modal will destroy it and remove it from the DOM.
// It will also stop the recording via the hidden Modal Event.
this.modal.hide();
}
/**
* Register event listeners for the modal.
*/
registerEventListeners() {
this.modalRoot.addEventListener('click', this.handleModalClick.bind(this));
this.modal.getRoot().on(ModalEvents.outsideClick, this.outsideClickHandler.bind(this));
this.modal.getRoot().on(ModalEvents.hidden, () => {
this.cleanupStream();
this.requestRecordingStop();
});
}
/**
* Prevent the Modal from closing when recording is on process.
*
* @param {MouseEvent} event The click event
*/
async outsideClickHandler(event) {
if (this.isRecording()) {
// The user is recording.
// Do not distract with a confirmation, just prevent closing.
event.preventDefault();
} else if (this.hasData()) {
// If there is a blobsize then there is data that may be lost.
// Ask the user to confirm they want to close the modal.
// We prevent default here, and then close the modal if they confirm.
event.preventDefault();
try {
await saveCancelPromise(
await getString("discard_title", component),
await getString("discard_desc", component),
await getString("confirm_yes", component),
);
this.modal.hide();
} catch (error) {
// Do nothing, the modal will not close.
}
}
}
/**
* Handle a click within the Modal.
*
* @param {MouseEvent} event The click event
*/
handleModalClick(event) {
const button = event.target.closest('button');
if (button && button.dataset.action) {
const action = button.dataset.action;
if (action === 'startstop') {
this.handleRecordingStartStopRequested();
}
if (action === 'upload') {
this.uploadRecording();
}
}
}
/**
* Handle the click event for the recording start/stop button.
*/
handleRecordingStartStopRequested() {
if (this.mediaRecorder?.state === 'recording') {
this.requestRecordingStop();
} else {
this.startRecording();
}
}
/**
* Handle the media stream after it has finished.
*/
async onMediaStopped() {
// Set source of audio player.
this.blob = new Blob(this.data.chunks, {
type: this.mediaRecorder.mimeType
});
this.player.srcObject = null;
this.player.src = URL.createObjectURL(this.blob);
// Change the label to "Record again".
this.setRecordButtonTextFromString('recordagain');
// Show audio player with controls enabled, and unmute.
this.player.muted = false;
this.player.controls = true;
this.getButtonContainer('player')?.classList.toggle('hide', false);
// Show upload button.
this.setUploadButtonVisibility(true);
this.setUploadButtonState(true);
}
/**
* Upload the recording and insert it into the editor content.
*/
async uploadRecording() {
// Trigger error if no recording has been made.
if (this.data.chunks.length === 0) {
this.displayAlert('norecordingfound');
return;
}
const fileName = this.getFileName((Math.random() * 1000).toString().replace('.', ''));
// Upload recording to server.
try {
// Once uploading starts, do not allow any further changes to the recording.
this.setRecordButtonVisibility(false);
// Disable the upload button.
this.setUploadButtonState(false);
// Upload the recording.
const fileURL = await uploadFile(this.editor, 'media', this.blob, fileName, (progress) => {
this.setUploadButtonTextProgress(progress);
});
this.insertMedia(fileURL);
this.close();
addToast(await getString('recordinguploaded', component));
} catch (error) {
// Show a toast and unhide the button.
this.setUploadButtonState(true);
addToast(await getString('uploadfailed', component, {error}), {
type: 'error',
});
}
}
/**
* Helper to get the container that a button is in.
*
* @param {string} purpose The button purpose
* @returns {HTMLElement}
*/
getButtonContainer(purpose) {
return this.modalRoot.querySelector(`[data-purpose="${purpose}-container"]`);
}
/**
* Check whether the browser is compatible with capturing media.
*
* @returns {boolean}
*/
static isBrowserCompatible() {
return this.checkSecure() && this.hasUserMedia();
}
static async display(editor) {
const ModalClass = this.getModalClass();
const modal = await ModalFactory.create({
type: ModalClass.TYPE,
templateContext: {},
large: true,
});
// Set up the VideoRecorder.
const recorder = new this(editor, modal);
if (recorder.isReady()) {
modal.show();
}
return modal;
}
/**
* Check whether the browser is compatible with capturing media, and display a warning if not.
*
* @returns {boolean}
*/
checkAndWarnAboutBrowserCompatibility() {
if (!this.constructor.checkSecure()) {
getStrings(['insecurealert_title', 'insecurealert'].map((key) => ({key, component})))
.then(([title, message]) => addToast(message, {title, type: 'error'}))
.catch();
return false;
}
if (!this.constructor.hasUserMedia) {
getStrings(['nowebrtc_title', 'nowebrtc'].map((key) => ({key, component})))
.then(([title, message]) => addToast(message, {title, type: 'error'}))
.catch();
return false;
}
return true;
}
/**
* Check whether the browser supports WebRTC.
*
* @returns {boolean}
*/
static hasUserMedia() {
return (navigator.mediaDevices && window.MediaRecorder);
}
/**
* Check whether the hostname is either hosted over SSL, or from a valid localhost hostname.
*
* The UserMedia API can only be used in secure contexts as noted.
* @see {@link https://developer.mozilla.org/en-US/docs/Web/API/MediaDevices/getUserMedia#privacy_and_security}
*
* @returns {boolean} Whether the plugin can be loaded.
*/
static checkSecure() {
// Note: We can now use window.isSecureContext.
// https://developer.mozilla.org/en-US/docs/Web/Security/Secure_Contexts#feature_detection
// https://developer.mozilla.org/en-US/docs/Web/API/isSecureContext
return window.isSecureContext;
}
/**
* Update the content of the stop recording button timer.
*/
async setStopRecordingButton() {
const {html, js} = await Templates.renderForPromise('tiny_recordrtc/timeremaining', this.getTimeRemaining());
Templates.replaceNodeContents(this.startStopButton, html, js);
this.buttonTimer = setInterval(this.updateRecordButtonTime.bind(this), 500);
}
/**
* Update the time on the stop recording button.
*/
updateRecordButtonTime() {
const {remaining, minutes, seconds} = this.getTimeRemaining();
if (remaining < 0) {
this.requestRecordingStop();
} else {
this.startStopButton.querySelector('[data-type="minutes"]').textContent = minutes;
this.startStopButton.querySelector('[data-type="seconds"]').textContent = seconds;
}
}
/**
* Set the text of the record button using a language string.
*
* @param {string} string The string identifier
*/
async setRecordButtonTextFromString(string) {
this.startStopButton.textContent = await getString(string, component);
}
/**
* Set the upload button text progress.
*
* @param {number} progress The progress
*/
async setUploadButtonTextProgress(progress) {
this.uploadButton.textContent = await getString('uploading', component, {
progress: Math.round(progress * 100) / 100,
});
}
async resetUploadButtonText() {
this.uploadButton.textContent = await getString('upload', component);
}
/**
* Clear the timer for the stop recording button.
*/
clearButtonTimer() {
if (this.buttonTimer) {
clearInterval(this.buttonTimer);
}
this.buttonTimer = null;
}
/**
* Get the time remaining for the recording.
*
* @returns {Object} The minutes and seconds remaining.
*/
getTimeRemaining() {
// All times are in milliseconds
const now = new Date().getTime();
const remaining = Math.floor(this.getTimeLimit() - ((now - this.startTime) / 1000));
const formatter = new Intl.NumberFormat(navigator.language, {minimumIntegerDigits: 2});
const seconds = formatter.format(remaining % 60);
const minutes = formatter.format(Math.floor((remaining - seconds) / 60));
return {
remaining,
minutes,
seconds,
};
}
/**
* Get the maximum file size that can be uploaded.
*
* @returns {number} The max byte size
*/
getMaxUploadSize() {
return this.config.maxrecsize;
}
/**
* Stop the recording.
* Please note that this should only stop the recording.
* Anything related to processing the recording should be handled by the
* mediaRecorder's stopped event handler which is processed after it has stopped.
*/
requestRecordingStop() {
if (this.mediaRecorder && this.mediaRecorder.state !== 'inactive') {
this.stopRequested = true;
} else {
// There is no recording to stop, but the stream must still be cleaned up.
this.cleanupStream();
}
}
stopRecorder() {
this.mediaRecorder.stop();
// Unmute the player so that the audio is heard during playback.
this.player.muted = false;
}
/**
* Clean up the stream.
*
* This involves stopping any track which is still active.
*/
cleanupStream() {
if (this.stream) {
this.stream.getTracks()
.filter((track) => track.readyState !== 'ended')
.forEach((track) => track.stop());
}
}
/**
* Handle the mediaRecorder `stop` event.
*/
handleStopped() {
// Handle the stream data.
this.onMediaStopped();
// Clear the button timer.
this.clearButtonTimer();
}
/**
* Handle the mediaRecorder `start` event.
*
* This event is called when the recording starts.
*/
handleStarted() {
this.startTime = new Date().getTime();
this.setStopRecordingButton();
}
/**
* Handle the mediaRecorder `dataavailable` event.
*
* @param {Event} event
*/
handleDataAvailable(event) {
if (this.isRecording()) {
const newSize = this.data.blobSize + event.data.size;
// Recording stops when either the maximum upload size is reached, or the time limit expires.
// The time limit is checked in the `updateButtonTime` function.
if (newSize >= this.getMaxUploadSize()) {
this.stopRecorder();
this.displayFileLimitHitMessage();
} else {
// Push recording slice to array.
this.data.chunks.push(event.data);
// Size of all recorded data so far.
this.data.blobSize = newSize;
if (this.stopRequested) {
this.stopRecorder();
}
}
}
}
async displayFileLimitHitMessage() {
addToast(await getString('maxfilesizehit', component), {
title: await getString('maxfilesizehit_title', component),
type: 'error',
});
}
/**
* Check whether the recording is in progress.
*
* @returns {boolean}
*/
isRecording() {
return this.mediaRecorder?.state === 'recording';
}
/**
* Whether any data has been recorded.
*
* @returns {boolean}
*/
hasData() {
return !!this.data?.blobSize;
}
/**
* Start the recording
*/
async startRecording() {
if (this.mediaRecorder) {
// Stop the existing recorder if it exists.
if (this.isRecording()) {
this.mediaRecorder.stop();
}
if (this.hasData()) {
const resetRecording = await this.recordAgainConfirmation();
if (!resetRecording) {
// User cancelled at the confirmation to reset the data, so exit early.
return;
}
this.setUploadButtonVisibility(false);
}
this.mediaRecorder = null;
}
// The options for the recording codecs and bitrates.
this.mediaRecorder = new MediaRecorder(this.stream, this.getParsedRecordingOptions());
this.mediaRecorder.addEventListener('dataavailable', this.handleDataAvailable.bind(this));
this.mediaRecorder.addEventListener('stop', this.handleStopped.bind(this));
this.mediaRecorder.addEventListener('start', this.handleStarted.bind(this));
this.data = {
chunks: [],
blobSize: 0
};
this.setupPlayerSource();
this.stopRequested = false;
// Capture in 50ms chunks.
this.mediaRecorder.start(50);
}
/**
* Confirm whether the user wants to reset the existing recoring.
*
* @returns {Promise<boolean>} Whether the user confirmed the reset.
*/
async recordAgainConfirmation() {
try {
await saveCancelPromise(
await getString("recordagain_title", component),
await getString("recordagain_desc", component),
await getString("confirm_yes", component)
);
return true;
} catch {
return false;
}
}
/**
* Insert the HTML to embed the recording into the editor content.
*
* @param {string} source The URL to view the media.
*/
async insertMedia(source) {
const {html} = await Templates.renderForPromise(
this.getEmbedTemplateName(),
this.getEmbedTemplateContext({
source,
})
);
this.editor.insertContent(html);
}
/**
* Add or modify the template parameters for the specified type.
*
* @param {Object} templateContext The Tempalte context to use
* @returns {Object} The finalised template context
*/
getEmbedTemplateContext(templateContext) {
return templateContext;
}
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Sindbad File Manager Version 1.0, Coded By Sindbad EG ~ The Terrorists