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main.js
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main.js
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(async () =>
{
const TTDB = {}, API = {}, EXPR = {}, UTIL = {}, SPLASH = {};
TTDB.timers = {};
TTDB.observers = {};
/**
* Interval object
*
* Sets the amount of update attempts that should be done
*/
TTDB.interval = {
counter: 50,
delay: 250
};
/**
* Different item modes (mode="X")
*/
TTDB.MODE = {
FEED: '0',
GRID: '1',
BROWSER: '2',
SWIPER_SLIDE: '3', /** Is this an obsolete mode? */
BASIC_PLAYER: '4'
};
/**
* Sets the amount of item checks to do
*
* @param {integer} count
*/
TTDB.setInterval = (count) => {
if (TTDB.interval.counter < count) {
TTDB.interval.counter = count
}
};
/**
* Log to console
*
* @param {...any} args
*/
const pipe = (...args) => {
console.info('[TTDB]', ...args)
};
/**
* Dipatches an event on an element
*
* @param {HTMLElement} element
* @param {class} eventType
* @param {string} event
*/
UTIL.dispatchEvent = (element, eventType, event) => {
element.dispatchEvent(new eventType(event, {
bubbles: true,
cancelable: true,
view: window
}));
};
/**
* Truncates a string
*
* @param {string} string
* @param {integer} n
*/
UTIL.truncateString = (string, n) => {
return (string.length > n) ? string.substr(0, n - 1) : string;
};
/**
* Generates a random string from a character set
*
* @param {string} characters
* @param {integer} length
*/
UTIL.ranGen = (charSet, length = 16) => {
let result = '';
const setLength = charSet.length;
for(let i = 0; i < length; i++) {
result += charSet.charAt(Math.floor(Math.random() * setLength));
} return result;
};
/**
* Generates a random integer between min and max
*
* @param {integer} min
* @param {integer} max
*/
UTIL.ranInt = (min, max) => {
return Math.floor(Math.random() * (max - min + 1) + min);
};
/**
* Attempts to sanitize a filename
*
* @param {string} string
*/
UTIL.sanitizeFilename = (string) => {
/**
* Regex ranges and characters:
*
* \u3040-\u30ff — Hiragana and katakana
* \u3400-\u4dbf — CJK unified ideographs extension A
* \u4e00-\u9fff — CJK unified ideographs
* \uf900-\ufaff — CJK compatibility ideographs
* \uff66-\uff9f — Half-width katakana
* \wа-я — Cyrillic
* 0-9a-zA-Z — Numbers and latin letters
* -._ #()\[\] — Other characters
*/
string = string.replace(
/[^\u3040-\u30ff\u3400-\u4dbf\u4e00-\u9fff\uf900-\ufaff\uff66-\uff9f\wа-я0-9a-zA-Z-._ #()\[\]]/g, ''
).replace(/\s\s+/g, ' ').trim();
// Remove any leading dots
while(string[0] === '.') {
string = string.substring(1);
}
// Filename limit is about 250, so we'll shorten any super long filenames
return (string.length - 4) >= 246 ? `${string.replace('.mp4', '').substring(0, 246).trim()}.mp4` : string;
}
/**
* Checks the existance of a key in an object
*
* @param {object} obj
* @param {string} level
* @param {...any} rest
* @returns
*/
UTIL.checkNested = (obj, level, ...rest) => {
if (obj === undefined) {
return false;
}
if (rest.length == 0 && obj.hasOwnProperty(level)) {
return true;
}
return UTIL.checkNested(obj[level], ...rest);
};
/**
* Traverses an object for a key, then gets that value
*
* Returns an undefined value if not found
*
* @param {object} obj
* @param {string} needle
*/
UTIL.traverseObj = (obj, needles, index = 0) => {
if (obj !== null && typeof obj === "object" && index < needles.length) {
const needle = needles[index];
for (const key of Object.keys(obj)) {
if (key === needle) {
if (index === needles.length - 1) {
return obj[key];
}
return UTIL.traverseObj(obj[key], needles, index + 1);
}
}
for (const key of Object.keys(obj)) {
const result = UTIL.traverseObj(obj[key], needles, index);
if (result !== undefined) {
return result;
}
}
}
return undefined;
}
/**
* Fetches a stored setting
*
* @param {string} key
*/
const getStoredSetting = async (key) => {
const stored = await chrome.storage.local.get(key);
if (stored && stored.hasOwnProperty(key)) {
return stored[key];
}
return null;
};
/** Matches `https://www.tiktok.com/@user/video/123456789` URLs */
EXPR.vanillaVideoUrl = (haystack, options = {}) => {
let expression = ('https?:\/\/(?:www\.)?tiktok\.com\/@([^\/]+)\/video\/([0-9]+)');
if (options.strict) {
expression = ('^' + expression + '$');
}
const matches = new RegExp(expression).exec(haystack);
return matches ? matches : null;
};
/**
* Create splash elements
*/
SPLASH.create = () => {
const body = document.body;
// Create splash elements
const wrapper = document.createElement('div');
const content = document.createElement('div');
wrapper.classList.add('ttdb_splash-wrapper');
content.classList.add('ttdb_splash-content');
content.textContent = '';
wrapper.appendChild(content);
if (body) {
body.appendChild(wrapper);
// Store references
SPLASH.wrapper = wrapper;
SPLASH.content = content;
SPLASH.content.addEventListener('click', (_) => {
chrome.runtime.sendMessage(chrome.runtime.id, {
task: 'fileShow'
});
});
}
return wrapper;
};
/**
* Display a splash message
*
* @param {string} message
* @param {integer} duration
*/
SPLASH.message = (message, options = {}, callback = null) => {
const state = options.state ? options.state : 0;
if (SPLASH.wrapper && SPLASH.content) {
clearTimeout(TTDB.timers.splash);
if (state === 0 || state === 1) {
if (SPLASH.content.classList.contains('state-warn'))
SPLASH.content.classList.remove('state-warn');
if (!SPLASH.content.classList.contains('state-success'))
SPLASH.content.classList.add('state-success');
} else if (state > 1) {
if (SPLASH.content.classList.contains('state-success'))
SPLASH.content.classList.remove('state-success');
if (!SPLASH.content.classList.contains('state-warn'))
SPLASH.content.classList.add('state-warn');
}
SPLASH.content.textContent = message;
DOM.setStyle(SPLASH.wrapper, {
'opacity': 1,
'pointer-events': 'auto'
});
TTDB.timers.splash = setTimeout(() => {
DOM.setStyle(SPLASH.wrapper, {
'opacity': 0,
'pointer-events': 'none'
});
if (callback) {
callback();
}
}, options.duration || 3000);
return true;
}
};
/**
* Different environments
*
* Default: `APP` is the main environment (most regions)
* `__NEXT` has a different HTML structure, region-based and maybe obsolete now?
*/
TTDB.ENV = {
APP: Symbol(true),
__NEXT: Symbol(true),
};
TTDB.DEFAULT_ENV = TTDB.ENV.APP;
/**
* `fetch` headers for requests
*
* https://developer.mozilla.org/en-US/docs/Web/API/fetch
*/
TTDB.headers = {
method: 'GET',
mode: 'cors',
cache: 'no-cache',
credentials: 'include',
redirect: 'follow'
};
/**
* API variables
*/
API.AID = 0;
API.APP_NAME = 'musical_ly';
API.HOSTNAME = 'api22-normal-c-useast2a.tiktokv.com';
API.API_V = 'v1';
API.FORMATS = [
'play_addr',
'play_addr_h264',
'play_addr_bytevc1',
'download_addr'
];
/**
* Builds an API query URL
*
* @param {string} videoId
*/
API.constructApiQuery = (videoId) => {
const fetchType = 'feed';
const ts = Math.round(Date.now() / 1000);
const parameters = {
'aweme_id': videoId,
'version_name': '34.1.2',
'version_code': '2023401020',
'build_number': '34.1.2',
'manifest_version_code': '2023401020',
'update_version_code': '2023401020',
'openudid': UTIL.ranGen('0123456789abcdef', 16),
'uuid': UTIL.ranGen('0123456789', 16),
'_rticket': ts * 1000,
'ts': ts,
'device_brand': 'Google',
'device_type': 'ASUS_Z01QD',
'device_platform': 'android',
"iid": "7318518857994389254",
"device_id": UTIL.ranInt(7250000000000000000, 7351147085025500000),
'resolution': '1080*1920',
'dpi': 420,
'os_version': '10',
'os_api': '29',
'carrier_region': 'US',
'sys_region': 'US',
'region': 'US',
'app_name': API.APP_NAME,
'app_version': '34.1.2',
'app_language': 'en',
'manifest_app_version': '2023401020',
'language': 'en',
'timezone_name': 'America/New_York',
'timezone_offset': '-14400',
'channel': 'googleplay',
'ac': 'wifi',
'mcc_mnc': '310260',
'is_my_cn': 0,
'aid': API.AID,
'ssmix': 'a',
'as': 'a1qwert123',
'cp': 'cbfhckdckkde1'
};
return `https://${API.HOSTNAME}/aweme/${API.API_V}/${fetchType}/` + Object.keys(parameters).map(
(key, index) => `${index > 0 ? '&' : '?'}${key}=${parameters[key]}`
).join('');
};
/**
* Attempts to get id from API data
*
* @param {object} data
*/
API.extractId = (data, fallback = null) => {
let id = { user: null, description: null };
/** Attempt to get the video description */
if (UTIL.checkNested(data, 'aweme_detail', 'desc')) {
id.description = data.aweme_detail.desc;
}
/** Attempt to get the channel of the video */
(['unique_id', 'nickname', 'ins_id']).forEach((key) => {
if (!id.user && UTIL.checkNested(data, 'aweme_detail', 'author', key)) {
id.user = data.aweme_detail.author[key];
}
});
if (!id.description) {
id = {
user: id.user,
description: fallback
? fallback
: (data.videoId ? data.videoId : Date.now())
};
}
return id;
};
API.extractVideoUrls = (data) => {
const urls = [];
// Iterate over formats
(API.FORMATS).forEach((format) =>
{
// Check if format is available
if (data.aweme_detail.video.hasOwnProperty(format) &&
data.aweme_detail.video[format].hasOwnProperty('data_size') &&
data.aweme_detail.video[format].hasOwnProperty('url_list') &&
data.aweme_detail.video[format].url_list.length > 0)
{
const videoUrl = data.aweme_detail.video[format].url_list[0];
const videoSize = data.aweme_detail.video[format].data_size;
const videoRes = data.aweme_detail.video[format].height * data.aweme_detail.video[format].width;
urls.push([videoRes, videoSize, videoUrl]);
}
});
// Iterate over bit_rate data
if (data.aweme_detail.video.hasOwnProperty('bit_rate') && Array.isArray(data.aweme_detail.video.bit_rate)) {
let bestItem = null, bestQuality = null;
for(const videoItem of data.aweme_detail.video.bit_rate) {
if (bestQuality === null || videoItem.quality_type < bestQuality) {
bestItem = videoItem;
bestQuality = videoItem.quality_type;
}
}
if (bestItem.hasOwnProperty('play_addr') && bestItem.play_addr.hasOwnProperty('url_list')) {
const videoUrl = bestItem.play_addr.url_list[0];
const videoSize = bestItem.play_addr.data_size;
const videoRes = bestItem.play_addr.height * bestItem.play_addr.width;
urls.unshift([videoRes, videoSize, videoUrl]);
}
}
urls.sort((a, b) => (a[0] !== b[0]) ? b[0] - a[0] : b[1] - a[1]);
return urls;
}
/**
* Attempts to get a response from the API
*
* @param {string} videoId
*/
API.getResponse = (videoId) => {
let videoData = {
success: false,
description: null,
user: null,
url: null
};
return new Promise(async (resolve, reject) => {
const urlQuery = API.constructApiQuery(videoId);
try {
const response = await chrome.runtime.sendMessage(
chrome.runtime.id, { task: 'fetch', url: urlQuery }
);
const data = response.data; // Get JSON data
if (response.error) {
pipe('API Response failed', '@', urlQuery);
} else if (data) {
pipe('API Response:', data);
}
let videoUrl = null;
// Extract potential fallback data if available
if (data && UTIL.checkNested(data, 'aweme_list')) {
const awemeList = data.aweme_list;
const awemeEntries = Object.keys(awemeList);
for(let index = 0; index < awemeEntries.length; index++) {
const item = awemeList[awemeEntries[index]];
const awemeId = item.aweme_id ? parseInt(item.aweme_id) : null;
if (awemeId === parseInt(videoId)) {
// Set list item as `aweme_detail` because the structure is the same as the default fetch method
data.aweme_detail = { ...item }; break;
}
}
}
if (data && UTIL.checkNested(data, 'aweme_detail', 'video')) {
const extractedUrls = API.extractVideoUrls(data);
if (extractedUrls.length > 0) {
pipe("Extracted URLs", extractedUrls);
videoUrl = extractedUrls[0][2];
} else {
pipe("No URLs could be extracted from the response.");
}
}
if (videoUrl) {
videoData.success = true;
videoData.url = videoUrl;
videoData = {
...videoData,
...API.extractId({
...data,
...{
videoId: videoId
}
}),
apiFullResponse: data
}; resolve(videoData);
} else {
reject('No `videoUrl` was found in the API response.');
}
} catch(error) {
reject(error);
}
});
}
/**
* Attempts to fetch video URL through the API
*
* @param {string} videoId
*/
API.getVideoData = async (videoId) => {
return new Promise(async (resolve, reject) => {
await API.getResponse(videoId).then((response) => {
if (response.success) {
resolve({ ...{
success: false,
description: null,
user: null,
url: null
}, ...response })
}
}).catch((error) => {
pipe('API Attempt failed:', error);
});
reject(null);
});
};
/**
* Attempts to extract video data from the share popup
*
* @param {HTMLElement} element
*/
const findVideoUrls = (element) => {
let data = false;
if (element) {
/** Get shareable `a` elements */
const anchors = element.querySelectorAll('a[href]');
for(let i = 0; i < anchors.length; i++) {
const matches = EXPR.vanillaVideoUrl(decodeURIComponent(anchors[i].getAttribute('href')));
/** If any matches */
if (matches) {
const [, username, videoId] = matches;
data = { username, videoId }; break;
}
}
}
return data;
}
/**
* Attempts to get the `app` container
*/
const getAppContainer = () => {
return document.querySelector(DOM.multiSelector({
APP: 'div#app', __NEXT: 'div#main'
}));
};
/**
* Attempts to fetch the web API data for a video
*
* @param {object} videoData
*/
const getWebApiData = (videoData) => {
return new Promise((resolve, reject) => {
if (!videoData.videoApiId) {
reject('No video ID found in object');
}
const reqUrl = `https://www.tiktok.com/@${videoData.user}/video/${videoData.videoApiId}`;
fetch(reqUrl).then((res) => res.text()).then((body) => {
let status = null, webappDetail = null;
const webDocument = (new DOMParser()).parseFromString(body, 'text/html');
const UDScript = webDocument.querySelector('script#__UNIVERSAL_DATA_FOR_REHYDRATION__');
if (UDScript) {
try {
const UD = JSON.parse(UDScript.innerText);
status = UTIL.traverseObj(UD, ['webapp.video-detail', 'statusCode']) || 0
webappDetail = UTIL.traverseObj(UD, ['webapp.video-detail', 'itemInfo', 'itemStruct']);
} catch (error) {
reject('Error parsing web data: ' + error);
}
}
pipe('Got web API response', { status }, webappDetail);
if (webappDetail && ![10216].includes(status)) { // Video data is OK
resolve(webappDetail);
} else if (status === 10216) { // Status indicates a private video
reject('Video is private');
}
reject(`Video is not available (status code: ${status})`);
}).catch((error) => {
reject('Error fetching web data: ' + error);
});
});
}
/**
* Downloads a file
*
* @param {string} url
* @param {string} filename
*/
const downloadFile = async (url, filename, buttonElement = null) => {
// Sanitize filename
filename = UTIL.sanitizeFilename(filename), hasFallbacked = false;
if (filename.length > 250) { // Truncate any super long strings
filename = UTIL.truncateString(filename, 250);
}
/**
* Reverts the state of the progress button
*
* @param {HTMLElement} buttonElement
*/
const revertState = (buttonElement) => {
if (buttonElement) {
buttonElement.classList.remove('loading');
}
}
/**
* TikTok will sometimes return an invalid response (`TCP_MISS` || Code: 416)
* This causes the downloaded items to be 0 bytes.
*
* This is a workaround for now.
*/
const fallback = async (url) => {
if (hasFallbacked) {
return;
}
pipe('File could not be fetched — opening instead.');
SPLASH.message(
'[Fallback] Opened video in new tab [reason: fetch not allowed]', {
duration: 3500, state: 2
}
);
const tabActive = await getStoredSetting('download-fallback-tab-focus');
chrome.runtime.sendMessage(
chrome.runtime.id, {
task: 'windowOpen',
url,
active: tabActive === null ? true : tabActive
}
);
revertState(buttonElement);
hasFallbacked = true;
};
let subFolder = await getStoredSetting('download-subfolder-path');
if (!(typeof subFolder === 'string' || subFolder instanceof String)) {
subFolder = '';
}
// Attempt download using chrome API (@ `service.js`)
chrome.runtime.sendMessage(
chrome.runtime.id, {
task: 'fileDownload',
filename, url, subFolder
}).then((response) => {
if (response.success) {
pipe(`Downloaded ${url}`);
revertState(buttonElement);
SPLASH.message(`[Success] Downloaded file (ID: ${response.itemId})`, {
duration: 2500, state: 1
});
} else {
// Attempt download using .blob()
// We can't use a subfolder here since this is not using the browser API
fetch(url, TTDB.headers).then((t) => {
if (t.ok) {
return t.blob().then((b) => {
const anchor = document.createElement('a');
anchor.href = URL.createObjectURL(b);
anchor.setAttribute('download', filename);
UTIL.dispatchEvent(anchor, MouseEvent, 'click');
anchor.remove(); revertState(buttonElement);
SPLASH.message(`[Success] Downloaded file`, { duration: 2500 });
});
} else {
fallback(url);
}
}).catch(() => fallback(url));
}
});
};
/**
* DOM manipulation functions
*/
const DOM = {
/**
* Creates a basic polygon svg element
*
* @param {object} values
*/
createPolygonSvg: (values) => {
const w3Url = 'http://www.w3.org/2000/svg';
const [width, height] = values.dimensions;
const elementSvg = document.createElementNS(w3Url, 'svg');
const elementPolygon = document.createElementNS(w3Url, 'polygon');
DOM.setAttributes(elementSvg, {
width, height,
viewBox: `0 0 ${width} ${height}`
});
elementPolygon.setAttribute('points', values.points.join(' '));
elementSvg.appendChild(elementPolygon);
if (values.style) {
DOM.setStyle(elementSvg, values.style);
}
return elementSvg;
},
/**
* Sets the CSS style of an element
*
* @param {HTMLElement} element
* @param {object} values
*/
setStyle: (element, values) => {
Object.keys(values).forEach((key) => {
element.style[key] = values[key];
});
},
/**
* Sets the attributes of an element
*
* @param {HTMLElement} element
* @param {object} attributes
*/
setAttributes: (element, attributes) => {
Object.keys(attributes).forEach((key) => {
element.setAttribute(key, attributes[key]);
});
return element;
},
/**
* Creates a multi-selector out of an object
*
* @param {object} values
*/
multiSelector: (values) => {
return Object.keys(values).map((key) => values[key]).join(', ');
},
selectorNamed: (values) => {
for (const [name, value] of Object.entries(values)) {
values[name] = document.querySelector(value) || null;
}
return values;
},
/**
* Base function for creating button elements
*
* @param {object} values
*/
createButton: (values) => {
const container = document.createElement('a');
const inner = document.createElement(values.innerType ? values.innerType : 'span');
if (values.content) {
const [contentMode, content] = values.content || ['textContent', 'Download'];
if (content instanceof Element) {
inner[contentMode](content);
} else {
inner[contentMode] = content;
}
}
container.appendChild(inner);
container.setAttribute('class', values.class || '');
return container;
}
};
/**
* Creates different buttons for the different modes
*/
const createButton = {
/** Basic player (theater view) */
BASIC_PLAYER: () => {
const wrapper = document.createElement('div');
wrapper.classList.add('ttdb__button_basic-player_wrapper');
/** Create download button */
const button = DOM.createButton({
content: ['textContent', 'Download'],
class: 'ttdb__button_basic-player'
});
/** Set directly, as this makes it more compatible with dark mode addons */
DOM.setStyle(button, {
'border': '1px solid rgba(254, 44, 85, 1.0)',
'background-color': 'rgba(254, 44, 85, 0.08)'
});
wrapper.appendChild(button);
return wrapper;
},
/** Swiper slide items */
SWIPER_SLIDE: () => {
/** Create download button */
const button = DOM.createButton({
content: ['appendChild', DOM.createPolygonSvg({
dimensions: [24, 24],
points: [
'13', '17.586', '13', '4', '11', '4',
'11', '17.586', '4.707', '11.293', '3.293',
'12.707', '12', '21.414', '20.707', '12.707',
'19.293', '11.293', '13', '17.586'
],
style: {
color: '#161823'
},
})],
innerType: 'div',
class: 'ttdb__button_swiper_slide'
});
/** Set directly, as this makes it more compatible with dark mode addons */
DOM.setStyle(button, {
'background-color': 'rgba(0, 0, 0, 0.25)',
'color': '#000'
});
return button;
},
/** Browser items (full-view items) */
BROWSER: () => {
/** Create download button */
return DOM.createButton({
content: ['textContent', 'Download'],
class: 'ttdb__button_browser'
});
},
/** Feed items */
FEED: () => {
/** Create download button */
return DOM.createButton({
content: ['appendChild', DOM.createPolygonSvg({
dimensions: [24, 24],
points: [
'13', '17.586', '13', '4', '11', '4',
'11', '17.586', '4.707', '11.293', '3.293',
'12.707', '12', '21.414', '20.707', '12.707',
'19.293', '11.293', '13', '17.586'
]
})],
innerType: 'div',
class: 'ttdb__button_feed'
});
},
/** Grid items (videos/liked items) */
GRID: () => {
/** Create download button */
return DOM.createButton({
content: false,
class: 'ttdb__button_grid'
});
}
};
/**
* Attempts to extract the description/tags to use as an ID (for when no number ID is available)
*
* @param {HTMLElement} container
* @param {string} env
*/
const extractDescriptionId = (container, env = TTDB.ENV.APP) => {
let identifier = null;
let extracted = null;
if (env === TTDB.ENV.APP) {
const description = container.querySelector('span[class*="-SpanText "]');
if (description) {
extracted = description.parentElement.textContent;
}
} else if (env === TTDB.ENV.__NEXT) {
const metaTitle = container.querySelector('div[class*="video-meta-caption"]');
if (metaTitle) {
extracted = metaTitle.textContent;
}
}
if (extracted) {
extracted = extracted.replace(/[/\\?%*:|"<>]/g, '-').toLowerCase().trim();
if (extracted && extracted.length > 0) {
identifier = extracted;
}
}
return identifier;
};
/**
* Hacky way of retrieving the videoId of a `For You` item
*
* We need the ID to query the API correctly.
*
* @param {HTMLElement} element
* @param {function} callback
* @param {integer} timeout
*/
const feedShareExtractId = (element, callback, timeout = 500) => {
let timer = null;
const shareButton = element.querySelector('button:last-child');
const shareButtonSvg = shareButton.querySelector('span > svg');
// None of the required elements are defined — return `false`
if (!shareButtonSvg || !shareButton) {
callback(false);
}
// Callback wrapper
const respond = (response, existing = false) => {
if (!existing) {
setTimeout(() => shareButton.classList.remove('extract'), 500);
clearTimeout(timer);
UTIL.dispatchEvent(shareButtonSvg, MouseEvent, 'click');
} callback(response);
};
/**
* Called on mutation
*
* @param {array} mutationsList
*/
const onMutate = (mutationsList) => {
for (let mutation of mutationsList) {
if (mutation.type === 'childList') {
const attempt = findVideoUrls(element.querySelector('div[class*="-DivContainer "]'));