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app.js
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app.js
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const electron = require("electron");
const remote = electron.remote;
const dialog = remote.dialog;
const BrowserWindow = remote.BrowserWindow;
const fs = require("fs");
const prompt = require("dialogs")((opts = {}));
const mkdirp = require("mkdirp");
const homedir = require("os").homedir();
const sanitize = require("sanitize-filename");
const vtt2srt = require("node-vtt-to-srt");
var Downloader = require("mt-files-downloader");
var shell = require("electron").shell;
var https = require("https");
var app = require("http").createServer();
var io = require("socket.io")(app);
var headers;
const $loginAuthenticator = $(".ui.login.authenticator");
var awaitingLogin = false;
app.listen(50490);
io.on("connect", function(socket) {
$loginAuthenticator.removeClass("disabled");
socket.on("disconnect", function() {
$loginAuthenticator.addClass("disabled");
$(".ui.authenticator.dimmer").removeClass("active");
awaitingLogin = false;
});
$loginAuthenticator.click(function() {
$(".ui.authenticator.dimmer").addClass("active");
awaitingLogin = true;
socket.emit("awaitingLogin");
});
socket.on("newLogin", function(data) {
if (awaitingLogin) {
settings.set("access_token", data.access_token);
settings.set("subdomain", data.subdomain);
checkLogin();
}
});
});
electron.ipcRenderer.on("saveDownloads", function() {
saveDownloads(true);
});
var subDomain = settings.get("subdomain") || "www";
var $subDomain = $(".ui.login #subdomain");
$(".ui.dropdown").dropdown();
$(document).ajaxError(function(event, request) {
$(".dimmer").removeClass("active");
});
var downloadTemplate = `
<div class="ui tiny icon action buttons">
<button class="ui basic blue download button"><i class="download icon"></i></button>
<button class="ui disabled basic red pause button"><i class="pause icon"></i></button>
<button class="ui disabled basic green resume button"><i class="play icon"></i></button>
<button class="ui basic yellow browser button open-in-browser"><i class="desktop icon"></i></button>
</div>
<div class="ui horizontal divider"></div>
<div class="ui tiny indicating individual progress">
<div class="bar"></div>
</div>
<div class="ui horizontal divider"></div>
<div class="ui small indicating combined progress">
<div class="bar">
<div class="progress"></div>
</div>
<div class="label">${translate("Building Course Data")}</div>
</div>
`;
$(".ui.login #business").change(function() {
if ($(this).is(":checked")) {
$subDomain.show();
} else {
$subDomain.hide();
}
});
checkLogin();
$(".ui.dashboard .content").on("click", ".download-success", function() {
$(this).hide();
$(this)
.parents(".course")
.find(".download-status")
.show();
});
$(".ui.dashboard .content").on("click", ".open-in-browser",function() {
const link = `https://www.udemy.com${$(this).parents(".course.item").attr('course-url')}`;
shell.openExternal(link);
});
$(".ui.dashboard .content").on("click", ".load-more.button", function() {
var $this = $(this);
var $courses = $this.prev(".courses.items");
$.ajax({
type: "GET",
url: $this.data("url"),
beforeSend: function() {
$(".ui.dashboard .courses.dimmer").addClass("active");
},
headers: headers,
success: function(response) {
$(".ui.dashboard .courses.dimmer").removeClass("active");
$.each(response.results, function(index, course) {
$(`<div class="ui course item" course-id="${course.id}" course-url="${
course.url
}">
<div class="ui tiny label download-quality grey"></div>
<div class="ui tiny grey label download-speed"><span class="value">0</span> KB/s</div>
<div class="ui tiny image">
<img src="${course.image_240x135}">
</div>
<div class="content">
<span class="coursename">${
course.title
}</span>
<div class="ui tiny icon green download-success message">
<i class="check icon"></i>
<div class="content">
<div class="headers">
${translate(
"Download Completed"
)}
</div>
<p>${translate(
"Click to dismiss"
)}</p>
</div>
</div>
<div class="ui tiny icon red download-error message">
<i class="power icon"></i>
<div class="content">
<div class="headers">
${translate("Download Failed")}
</div>
<p>${translate(
"Click to retry"
)}</p>
</div>
</div>
<div class="extra download-status">
${downloadTemplate}
</div>
</div>
</div>
`).appendTo($courses);
});
if (!response.next) {
$this.remove();
} else {
$this.data("url", response.next);
}
}
});
});
$(".ui.dashboard .content").on("click", ".check-updates", function() {
$(".ui.dashboard .about.dimmer").addClass("active");
$.getJSON(
"https://api.github.com/repos/FaisalUmair/udemy-downloader-gui/releases/latest",
function(response) {
$(".ui.dashboard .about.dimmer").removeClass("active");
if (response.tag_name != `v${appVersion}`) {
$(".ui.update-available.modal").modal("show");
} else {
prompt.alert(translate("No updates available"));
}
}
);
});
$(".ui.dashboard .content .courses.section .search.form").submit(function(e) {
e.preventDefault();
var keyword = $(e.target)
.find("input")
.val();
if (validURL(keyword)) {
if (keyword.search(new RegExp("^(http|https)"))) {
keyword = "http://" + keyword;
}
$.ajax({
type: "GET",
url: keyword,
beforeSend: function() {
$(".ui.dashboard .course.dimmer").addClass("active");
},
headers: headers,
success: function(response) {
$(".ui.dashboard .course.dimmer").removeClass("active");
var keyword = $(".main-content h1.clp-lead__title", response)
.text()
.trim();
if (typeof keyword != "undefined" && keyword != "") {
search(keyword, headers);
} else {
$(".ui.dashboard .courses.dimmer").removeClass("active");
$(".ui.dashboard .ui.courses.section .disposable").remove();
$(".ui.dashboard .ui.courses.section .ui.courses.items").empty();
$(".ui.dashboard .ui.courses.section .ui.courses.items").append(
`<div class="ui yellow message disposable">${translate(
"No Courses Found"
)}</div>`
);
}
},
error: function() {
$(".ui.dashboard .courses.dimmer").removeClass("active");
$(".ui.dashboard .ui.courses.section .disposable").remove();
$(".ui.dashboard .ui.courses.section .ui.courses.items").empty();
$(".ui.dashboard .ui.courses.section .ui.courses.items").append(
`<div class="ui yellow message disposable">${translate(
"No Courses Found"
)}</div>`
);
}
});
} else {
search(keyword, headers);
}
});
$(".ui.dashboard .content").on(
"click",
".download.button, .download-error",
function(e) {
e.stopImmediatePropagation();
var $course = $(this).parents(".course");
var courseid = $course.attr("course-id");
$course.find(".download-error").hide();
$course.find(".download-status").show();
var settingsCached = settings.getAll();
var skipAttachments = settingsCached.download.skipAttachments;
var skipSubtitles = settingsCached.download.skipSubtitles;
$.ajax({
type: "GET",
url: `https://${subDomain}.udemy.com/api-2.0/courses/${courseid}/cached-subscriber-curriculum-items?page_size=100000`,
beforeSend: function() {
$(".ui.dashboard .course.dimmer").addClass("active");
},
headers: headers,
success: function(response) {
$(".ui.dashboard .course.dimmer").removeClass("active");
$course.find(".download.button").addClass("disabled");
$course.css("padding-bottom", "25px");
$course.find(".ui.progress").show();
var coursedata = [];
coursedata["chapters"] = [];
coursedata["name"] = $course.find(".coursename").text();
var chapterindex = -1;
var lectureindex = -1;
var remaining = response.count;
coursedata["totallectures"] = 0;
var availableSubs = [];
if (response.results[0]._class == "lecture") {
chapterindex++;
lectureindex = 0;
coursedata["chapters"][chapterindex] = [];
coursedata["chapters"][chapterindex]["name"] = "Chapter 1";
coursedata["chapters"][chapterindex]["lectures"] = [];
remaining--;
}
$.each(response.results, function(i, v) {
if (v._class == "chapter") {
chapterindex++;
lectureindex = 0;
coursedata["chapters"][chapterindex] = [];
coursedata["chapters"][chapterindex]["name"] = v.title;
coursedata["chapters"][chapterindex]["lectures"] = [];
remaining--;
} else if (
v._class == "lecture" &&
(v.asset.asset_type == "Video" ||
v.asset.asset_type == "Article" ||
v.asset.asset_type == "File" ||
v.asset.asset_type == "E-Book")
) {
if (v.asset.asset_type != "Video" && skipAttachments) {
remaining--;
if (!remaining) {
if (Object.keys(availableSubs).length) {
askforSubtile(
availableSubs,
initDownload,
$course,
coursedata
);
} else {
initDownload($course, coursedata);
}
}
return;
}
function getLecture(lecturename, chapterindex, lectureindex) {
$.ajax({
type: "GET",
url: `https://${subDomain}.udemy.com/api-2.0/users/me/subscribed-courses/${courseid}/lectures/${v.id}?fields[asset]=stream_urls,download_urls,captions,title,filename,data,body&fields[lecture]=asset,supplementary_assets`,
headers: headers,
success: function(response) {
if (v.asset.asset_type == "Article") {
if (response.asset.data) {
var src = response.asset.data.body;
} else {
var src = response.asset.body;
}
var videoQuality = v.asset.asset_type;
var type = "Article";
} else if (
v.asset.asset_type == "File" ||
v.asset.asset_type == "E-Book"
) {
var src =
response.asset.download_urls[v.asset.asset_type][0].file;
var videoQuality = v.asset.asset_type;
var type = "File";
} else {
var type = "Video";
var lecture = response.asset.stream_urls;
var qualities = [];
var qualitySrcMap = {};
lecture.Video.forEach(function(val) {
if (val.label == "Auto") return;
qualities.push(val.label);
qualitySrcMap[val.label] = val.file;
});
var lowest = Math.min(...qualities);
var highest = Math.max(...qualities);
var videoQuality = settingsCached.download.videoQuality;
if (!videoQuality || videoQuality == "Auto") {
var src = lecture.Video[0].file;
videoQuality = lecture.Video[0].label;
} else {
switch (videoQuality) {
case "Highest":
var src = qualitySrcMap[highest];
videoQuality = highest;
break;
case "Lowest":
var src = qualitySrcMap[lowest];
videoQuality = lowest;
break;
default:
videoQuality = videoQuality.slice(0, -1);
if (qualitySrcMap[videoQuality]) {
var src = qualitySrcMap[videoQuality];
} else {
var src = lecture.Video[0].file;
videoQuality = lecture.Video[0].label;
}
}
}
}
coursedata["chapters"][chapterindex]["lectures"][
lectureindex
] = {
src: src,
name: lecturename,
quality: videoQuality,
type: type
};
if (!skipSubtitles && response.asset.captions.length) {
coursedata["chapters"][chapterindex]["lectures"][
lectureindex
].caption = [];
response.asset.captions.forEach(function(caption) {
caption.video_label in availableSubs
? (availableSubs[caption.video_label] =
availableSubs[caption.video_label] + 1)
: (availableSubs[caption.video_label] = 1);
coursedata["chapters"][chapterindex]["lectures"][
lectureindex
].caption[caption.video_label] = caption.url;
});
}
if (
response.supplementary_assets.length &&
!skipAttachments
) {
coursedata["chapters"][chapterindex]["lectures"][
lectureindex
]["supplementary_assets"] = [];
var supplementary_assets_remaining =
response.supplementary_assets.length;
$.each(response.supplementary_assets, function(a, b) {
$.ajax({
type: "GET",
url: `https://${subDomain}.udemy.com/api-2.0/users/me/subscribed-courses/${courseid}/lectures/${v.id}/supplementary-assets/${b.id}?fields[asset]=download_urls,external_url,asset_type`,
headers: headers,
success: function(response) {
if (response.download_urls) {
coursedata["chapters"][chapterindex]["lectures"][
lectureindex
]["supplementary_assets"].push({
src:
response.download_urls[response.asset_type][0]
.file,
name: b.title,
quality: "Attachment",
type: "File"
});
} else {
coursedata["chapters"][chapterindex]["lectures"][
lectureindex
]["supplementary_assets"].push({
src: `<script type="text/javascript">window.location = "${response.external_url}";</script>`,
name: b.title,
quality: "Attachment",
type: "Url"
});
}
supplementary_assets_remaining--;
if (!supplementary_assets_remaining) {
remaining--;
coursedata["totallectures"] += 1;
if (!remaining) {
if (Object.keys(availableSubs).length) {
askforSubtile(
availableSubs,
initDownload,
$course,
coursedata
);
} else {
initDownload($course, coursedata);
}
}
}
}
});
});
} else {
remaining--;
coursedata["totallectures"] += 1;
if (!remaining) {
if (Object.keys(availableSubs).length) {
askforSubtile(
availableSubs,
initDownload,
$course,
coursedata
);
} else {
initDownload($course, coursedata);
}
}
}
}
});
}
getLecture(v.title, chapterindex, lectureindex);
lectureindex++;
} else if (!skipAttachments) {
coursedata["chapters"][chapterindex]["lectures"][lectureindex] = {
src: `<script type="text/javascript">window.location = "https://${subDomain}.udemy.com${$course.attr(
"course-url"
)}t/${v._class}/${v.id}";</script>`,
name: v.title,
quality: "Attachment",
type: "Url"
};
remaining--;
coursedata["totallectures"] += 1;
if (!remaining) {
if (Object.keys(availableSubs).length) {
askforSubtile(availableSubs, initDownload, $course, coursedata);
} else {
initDownload($course, coursedata);
}
}
lectureindex++;
} else {
remaining--;
if (!remaining) {
if (Object.keys(availableSubs).length) {
askforSubtile(availableSubs, initDownload, $course, coursedata);
} else {
initDownload($course, coursedata);
}
}
}
});
},
error: function(error) {
$(".ui.dashboard .course.dimmer").removeClass("active");
if (error.status == 403) {
prompt.alert(
translate("You do not have permission to access this course")
);
}
}
});
}
);
function initDownload($course, coursedata, subtitle = false) {
var $clone = $course.clone();
var $downloads = $(".ui.downloads.section .ui.courses.items");
var $courses = $(".ui.courses.section .ui.courses.items");
if ($course.parents(".courses.section").length) {
$downloadItem = $downloads.find(
"[course-id=" + $course.attr("course-id") + "]"
);
if ($downloadItem.length) {
$downloadItem.replaceWith($clone);
} else {
$downloads.prepend($clone);
}
} else {
$courseItem = $courses.find(
"[course-id=" + $course.attr("course-id") + "]"
);
if ($courseItem.length) {
$courseItem.replaceWith($clone);
}
}
$course.push($clone[0]);
var timer;
var downloader = new Downloader();
var $downloadStatus = $course.find(".download-status");
var $actionButtons = $course.find(".action.buttons");
var $downloadButton = $actionButtons.find(".download.button");
var $pauseButton = $actionButtons.find(".pause.button");
var $resumeButton = $actionButtons.find(".resume.button");
var lectureChaperMap = {};
var qualityColorMap = {
"144": "red",
"240": "orange",
"360": "blue",
"480": "teal",
"720": "olive",
"1080": "green",
Attachment: "pink",
Subtitle: "black"
};
var currentLecture = 0;
coursedata["chapters"].forEach(function(lecture, chapterindex) {
lecture["lectures"].forEach(function(x, lectureindex) {
currentLecture++;
lectureChaperMap[currentLecture] = {
chapterindex: chapterindex,
lectureindex: lectureindex
};
});
});
var course_name = sanitize(coursedata["name"]);
var totalchapters = coursedata["chapters"].length;
var totallectures = coursedata["totallectures"];
var $progressElemCombined = $course.find(".combined.progress");
var $progressElemIndividual = $course.find(".individual.progress");
var settingsCached = settings.getAll();
var download_directory =
settingsCached.download.path || homedir + "/Downloads";
var $download_speed = $course.find(".download-speed");
var $download_speed_value = $download_speed.find(".value");
var $download_quality = $course.find(".download-quality");
var downloaded = 0;
var downloadStart = settingsCached.download.downloadStart;
var downloadEnd = settingsCached.download.downloadEnd;
var enableDownloadStartEnd = settingsCached.download.enableDownloadStartEnd;
var autoRetry = settingsCached.download.autoRetry;
$course
.css("cssText", "padding-top: 35px !important")
.css("padding-bottom", "25px");
$pauseButton.click(function() {
downloader._downloads[downloader._downloads.length - 1].stop();
$pauseButton.addClass("disabled");
$resumeButton.removeClass("disabled");
});
$resumeButton.click(function() {
downloader._downloads[downloader._downloads.length - 1].resume();
$resumeButton.addClass("disabled");
$pauseButton.removeClass("disabled");
});
if (enableDownloadStartEnd) {
if (downloadStart > downloadEnd) {
downloadStart = downloadEnd;
}
if (downloadStart < 1) {
downloadStart = 1;
} else if (downloadStart > totallectures) {
downloadStart = totallectures;
}
if (downloadEnd < 1 || downloadEnd > totallectures) {
downloadEnd = totallectures;
}
var toDownload = downloadEnd - downloadStart + 1;
downloadChapter(
lectureChaperMap[downloadStart].chapterindex,
lectureChaperMap[downloadStart].lectureindex
);
} else {
var toDownload = totallectures;
downloadChapter(0, 0);
}
$progressElemCombined.progress({
total: toDownload,
text: {
active: `${translate("Downloaded")} {value} ${translate(
"out of"
)} {total} ${translate("items")}`
}
});
$progressElemCombined.progress("reset");
$download_speed.show();
$download_quality.show();
function downloadChapter(chapterindex, lectureindex) {
var num_lectures = coursedata["chapters"][chapterindex]["lectures"].length;
var chapter_name = sanitize(
chapterindex + 1 + ". " + coursedata["chapters"][chapterindex]["name"]
);
mkdirp(
download_directory + "/" + course_name + "/" + chapter_name,
function() {
downloadLecture(chapterindex, lectureindex, num_lectures, chapter_name);
}
);
}
function downloadLecture(
chapterindex,
lectureindex,
num_lectures,
chapter_name
) {
if (downloaded == toDownload) {
resetCourse($course.find(".download-success"));
return;
} else if (lectureindex == num_lectures) {
downloadChapter(++chapterindex, 0);
return;
}
function dlStart(dl, callback) {
// Change retry options to something more forgiving and threads to keep udemy from getting upset
dl.setRetryOptions({
retryInterval: 5000
});
dl.setOptions({
threadsCount: 5
});
dl.start();
// To track time and restarts
let notStarted = 0;
let reStarted = 0;
timer = setInterval(function() {
switch (dl.status) {
case 0:
// Wait a reasonable amount of time for the download to start and if it doesn't then start another one.
// once one of them starts the errors from the others will be ignored and we still get the file.
if (reStarted <= 5) {
notStarted++;
if (notStarted >= 15) {
dl.start();
notStarted = 0;
reStarted++;
}
}
$download_speed_value.html(0);
break;
case 1:
var stats = dl.getStats();
$download_speed_value.html(
parseInt(stats.present.speed / 1000) || 0
);
$progressElemIndividual.progress(
"set percent",
stats.total.completed
);
break;
case 2:
break;
case -1:
var stats = dl.getStats();
$download_speed_value.html(
parseInt(stats.present.speed / 1000) || 0
);
$progressElemIndividual.progress(
"set percent",
stats.total.completed
);
if (
dl.stats.total.size == 0 &&
dl.status == -1 &&
fs.existsSync(dl.filePath)
) {
dl.emit("end");
clearInterval(timer);
break;
} else {
$.ajax({
type: "HEAD",
url: dl.url,
error: function(error) {
if (error.status == 401 || error.status == 403) {
fs.unlinkSync(dl.filePath);
}
resetCourse($course.find(".download-error"));
},
success: function() {
resetCourse($course.find(".download-error"));
}
});
clearInterval(timer);
break;
}
default:
$download_speed_value.html(0);
}
}, 1000);
dl.on("error", function(dl) {
// Prevent throwing uncaught error
});
dl.on("start", function() {
$pauseButton.removeClass("disabled");
});
dl.on("end", function() {
callback();
});
}
function downloadAttachments(index, total_assets) {
$progressElemIndividual.progress("reset");
var lectureQuality =
coursedata["chapters"][chapterindex]["lectures"][lectureindex][
"supplementary_assets"
][index]["quality"];
var lastClass = $download_quality
.attr("class")
.split(" ")
.pop();
$download_quality
.html(lectureQuality)
.removeClass(lastClass)
.addClass(qualityColorMap[lectureQuality] || "grey");
if (
coursedata["chapters"][chapterindex]["lectures"][lectureindex][
"supplementary_assets"
][index]["type"] == "Article" ||
coursedata["chapters"][chapterindex]["lectures"][lectureindex][
"supplementary_assets"
][index]["type"] == "Url"
) {
fs.writeFile(
download_directory +
"/" +
course_name +
"/" +
chapter_name +
"/" +
sanitize(
lectureindex +
1 +
"." +
(index + 1) +
" " +
coursedata["chapters"][chapterindex]["lectures"][lectureindex][
"supplementary_assets"
][index]["name"].trim() +
".html"
),
coursedata["chapters"][chapterindex]["lectures"][lectureindex][
"supplementary_assets"
][index]["src"],
function() {
index++;
if (index == total_assets) {
$progressElemCombined.progress("increment");
downloaded++;
downloadLecture(
chapterindex,
++lectureindex,
num_lectures,
chapter_name
);
} else {
downloadAttachments(index, total_assets);
}
}
);
} else {
var lecture_name = sanitize(
lectureindex +
1 +
"." +
(index + 1) +
" " +
coursedata["chapters"][chapterindex]["lectures"][lectureindex][
"supplementary_assets"
][index]["name"].trim() +
(coursedata["chapters"][chapterindex]["lectures"][lectureindex][
"supplementary_assets"
][index]["name"]
.split(".")
.pop() ==
coursedata["chapters"][chapterindex]["lectures"][lectureindex][
"supplementary_assets"
][index]["src"]
.split("/")
.pop()
.split(".")
.pop()
.split("?")
.shift()
? ""
: "." +
coursedata["chapters"][chapterindex]["lectures"][lectureindex][
"supplementary_assets"
][index]["src"]
.split("/")
.pop()
.split(".")
.pop()
.split("?")
.shift())
);
if (
fs.existsSync(
download_directory +
"/" +
course_name +
"/" +
chapter_name +
"/" +
lecture_name +
".mtd"
)
) {
var dl = downloader.resumeDownload(
download_directory +
"/" +
course_name +
"/" +
chapter_name +
"/" +
lecture_name
);
if (
!fs.statSync(
download_directory +
"/" +
course_name +
"/" +
chapter_name +
"/" +
lecture_name +
".mtd"
).size
) {
dl = downloader.download(
coursedata["chapters"][chapterindex]["lectures"][lectureindex][
"supplementary_assets"
][index]["src"],
download_directory +
"/" +
course_name +
"/" +
chapter_name +
"/" +
lecture_name
);
}
} else if (
fs.existsSync(
download_directory +
"/" +
course_name +
"/" +
chapter_name +
"/" +
lecture_name
)
) {
endDownload();
return;
} else {
var dl = downloader.download(
coursedata["chapters"][chapterindex]["lectures"][lectureindex][
"supplementary_assets"
][index]["src"],
download_directory +
"/" +
course_name +
"/" +
chapter_name +
"/" +
lecture_name
);
}
dlStart(dl, endDownload);
function endDownload() {
index++;
$pauseButton.addClass("disabled");
clearInterval(timer);
if (index == total_assets) {
$progressElemCombined.progress("increment");
downloaded++;
downloadLecture(
chapterindex,
++lectureindex,
num_lectures,
chapter_name
);
} else {
downloadAttachments(index, total_assets);
}
}
}
}
function checkAttachment() {
$progressElemIndividual.progress("reset");
if (
coursedata["chapters"][chapterindex]["lectures"][lectureindex][
"supplementary_assets"
]
) {
var total_assets =
coursedata["chapters"][chapterindex]["lectures"][lectureindex][
"supplementary_assets"
].length;
var index = 0;
downloadAttachments(index, total_assets);
} else {
$progressElemCombined.progress("increment");
downloaded++;
downloadLecture(
chapterindex,
++lectureindex,
num_lectures,
chapter_name
);
}
}
function downloadSubtitle() {
$progressElemIndividual.progress("reset");
var lastClass = $download_quality
.attr("class")
.split(" ")
.pop();
$download_quality
.html("Subtitle")
.removeClass(lastClass)
.addClass(qualityColorMap["Subtitle"] || "grey");
$download_speed_value.html(0);
var lecture_name = sanitize(
lectureindex +
1 +
". " +
coursedata["chapters"][chapterindex]["lectures"][lectureindex][
"name"
].trim() +
".vtt"
);
if (
fs.existsSync(
download_directory +
"/" +
course_name +
"/" +
chapter_name +
"/" +
lecture_name.replace(".vtt", ".srt")