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https://github.com/CompeyDev/fxtwitter-docker.git
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336 lines
12 KiB
TypeScript
336 lines
12 KiB
TypeScript
import { Constants } from './constants';
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import { handleQuote } from './helpers/quote';
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import { sanitizeText } from './helpers/utils';
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import { Strings } from './strings';
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import { getAuthorText } from './helpers/author';
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import { statusAPI } from './api';
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export const returnError = (error: string): StatusResponse => {
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return {
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text: Strings.BASE_HTML.format({
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lang: '',
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headers: [
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`<meta content="${Constants.BRANDING_NAME}" property="og:title"/>`,
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`<meta content="${error}" property="og:description"/>`
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].join('')
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})
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};
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};
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/* Handler for Twitter statuses (Tweets).
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Like Twitter, we use the terminologies interchangably. */
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export const handleStatus = async (
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status: string,
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mediaNumber?: number,
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userAgent?: string,
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flags?: InputFlags,
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language?: string,
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event?: FetchEvent
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// eslint-disable-next-line sonarjs/cognitive-complexity
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): Promise<StatusResponse> => {
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console.log('Direct?', flags?.direct);
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const api = await statusAPI(status, language, event as FetchEvent);
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const tweet = api?.tweet as APITweet;
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/* Catch this request if it's an API response */
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if (flags?.api) {
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return {
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response: new Response(JSON.stringify(api), {
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headers: { ...Constants.RESPONSE_HEADERS, 'content-type': 'application/json' },
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status: api.code
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})
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};
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}
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/* If there was any errors fetching the Tweet, we'll return it */
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switch (api.code) {
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case 401:
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return returnError(Strings.ERROR_PRIVATE);
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case 404:
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return returnError(Strings.ERROR_TWEET_NOT_FOUND);
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case 500:
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return returnError(Strings.ERROR_API_FAIL);
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}
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/* Catch direct media request (d.fxtwitter.com, or .mp4 / .jpg) */
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if (flags?.direct && tweet.media) {
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let redirectUrl: string | null = null;
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if (tweet.media.videos) {
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const { videos } = tweet.media;
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redirectUrl = (videos[(mediaNumber || 1) - 1] || videos[0]).url;
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} else if (tweet.media.photos) {
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const { photos } = tweet.media;
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redirectUrl = (photos[(mediaNumber || 1) - 1] || photos[0]).url;
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}
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if (redirectUrl) {
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return { response: Response.redirect(redirectUrl, 302) };
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}
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}
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/* Use quote media if there is no media in this Tweet */
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if (!tweet.media && tweet.quote?.media) {
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tweet.media = tweet.quote.media;
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tweet.twitter_card = tweet.quote.twitter_card;
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}
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/* At this point, we know we're going to have to create a
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regular embed because it's not an API or direct media request */
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let authorText = getAuthorText(tweet) || Strings.DEFAULT_AUTHOR_TEXT;
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const engagementText = authorText.replace(/ {4}/g, ' ');
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let siteName = Constants.BRANDING_NAME;
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let newText = tweet.text;
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/* Base headers included in all responses */
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const headers = [
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`<meta content="${tweet.color}" property="theme-color"/>`,
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`<meta name="twitter:card" content="${tweet.twitter_card}"/>`,
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`<meta name="twitter:site" content="@${tweet.author.screen_name}"/>`,
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`<meta name="twitter:creator" content="@${tweet.author.screen_name}"/>`,
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`<meta name="twitter:title" content="${tweet.author.name} (@${tweet.author.screen_name})"/>`
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];
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/* This little thing ensures if by some miracle a FixTweet embed is loaded in a browser,
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it will gracefully redirect to the destination instead of just seeing a blank screen.
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Telegram is dumb and it just gets stuck if this is included, so we never include it for Telegram UAs. */
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if (userAgent?.indexOf('Telegram') === -1) {
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headers.push(
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`<meta http-equiv="refresh" content="0;url=https://twitter.com/${tweet.author.screen_name}/status/${tweet.id}"/>`
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);
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}
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/* This Tweet has a translation attached to it, so we'll render it. */
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if (tweet.translation) {
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const { translation } = tweet;
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const formatText =
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language === 'en'
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? Strings.TRANSLATE_TEXT.format({
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language: translation.source_lang_en
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})
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: Strings.TRANSLATE_TEXT_INTL.format({
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source: translation.source_lang.toUpperCase(),
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destination: translation.target_lang.toUpperCase()
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});
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newText = `${formatText}\n\n` + `${translation.text}\n\n`;
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}
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/* This Tweet has a video to render.
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Twitter supports multiple videos in a Tweet now. But we have no mechanism to embed more than one.
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You can still use /video/:number to get a specific video. Otherwise, it'll pick the first. */
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if (tweet.media?.videos) {
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authorText = newText || '';
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if (tweet?.translation) {
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authorText = tweet.translation?.text || '';
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}
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const { videos } = tweet.media;
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const video = videos[(mediaNumber || 1) - 1];
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/* This fix is specific to Discord not wanting to render videos that are too large,
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or rendering low quality videos too small.
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Basically, our solution is to cut the dimensions in half if the video is too big (> 1080p),
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or double them if it's too small. (<400p)
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We check both height and width so we can apply this to both horizontal and vertical videos equally*/
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let sizeMultiplier = 1;
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if (video.width > 1920 || video.height > 1920) {
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sizeMultiplier = 0.5;
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}
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if (video.width < 400 && video.height < 400) {
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sizeMultiplier = 2;
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}
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/* Like photos when picking a specific one (not using mosaic),
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we'll put an indicator if there are more than one video */
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if (videos.length > 1) {
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const videoCounter = Strings.VIDEO_COUNT.format({
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number: String(videos.indexOf(video) + 1),
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total: String(videos.length)
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});
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authorText =
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authorText === Strings.DEFAULT_AUTHOR_TEXT
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? videoCounter
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: `${authorText}${authorText ? ' ― ' : ''}${videoCounter}`;
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siteName = `${Constants.BRANDING_NAME} - ${videoCounter}`;
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if (engagementText) {
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siteName = `${Constants.BRANDING_NAME} - ${engagementText} - ${videoCounter}`;
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}
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}
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/* Push the raw video-related headers */
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headers.push(
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`<meta name="twitter:player:stream:content_type" content="${video.format}"/>`,
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`<meta name="twitter:player:height" content="${video.height * sizeMultiplier}"/>`,
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`<meta name="twitter:player:width" content="${video.width * sizeMultiplier}"/>`,
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`<meta name="og:video" content="${video.url}"/>`,
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`<meta name="og:video:secure_url" content="${video.url}"/>`,
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`<meta name="og:video:height" content="${video.height * sizeMultiplier}"/>`,
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`<meta name="og:video:width" content="${video.width * sizeMultiplier}"/>`,
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`<meta name="og:video:type" content="${video.format}"/>`,
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`<meta name="twitter:image" content="0"/>`
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);
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}
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/* This Tweet has one or more photos to render */
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if (tweet.media?.photos) {
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const { photos } = tweet.media;
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let photo = photos[(mediaNumber || 1) - 1];
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/* If there isn't a specified media number and we have a
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mosaic response, we'll render it using mosaic */
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if (typeof mediaNumber !== 'number' && tweet.media.mosaic) {
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photo = {
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/* Telegram is dumb and doesn't support webp in opengraph embeds */
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url:
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userAgent?.indexOf('Telegram') === -1
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? tweet.media.mosaic.formats.webp
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: tweet.media.mosaic.formats.jpeg,
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width: tweet.media.mosaic.width,
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height: tweet.media.mosaic.height,
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type: 'photo'
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};
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/* If mosaic isn't available or the link calls for a specific photo,
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we'll indicate which photo it is out of the total */
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} else if (photos.length > 1) {
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const photoCounter = Strings.PHOTO_COUNT.format({
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number: String(photos.indexOf(photo) + 1),
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total: String(photos.length)
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});
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authorText =
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authorText === Strings.DEFAULT_AUTHOR_TEXT
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? photoCounter
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: `${authorText}${authorText ? ' ― ' : ''}${photoCounter}`;
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siteName = `${Constants.BRANDING_NAME} - ${photoCounter}`;
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if (engagementText) {
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siteName = `${Constants.BRANDING_NAME} - ${engagementText} - ${photoCounter}`;
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}
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}
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/* Push the raw photo-related headers */
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headers.push(
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`<meta name="twitter:image" content="${photo.url}"/>`,
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`<meta name="twitter:image:width" content="${photo.width}"/>`,
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`<meta name="twitter:image:height" content="${photo.height}"/>`,
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`<meta name="og:image" content="${photo.url}"/>`,
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`<meta name="og:image:width" content="${photo.width}"/>`,
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`<meta name="og:image:height" content="${photo.height}"/>`
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);
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}
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/* We have external media available to us (i.e. YouTube videos) */
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if (tweet.media?.external) {
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const { external } = tweet.media;
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authorText = newText || '';
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headers.push(
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`<meta name="twitter:player" content="${external.url}">`,
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`<meta name="twitter:player:width" content="${external.width}">`,
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`<meta name="twitter:player:height" content="${external.height}">`,
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`<meta property="og:type" content="video.other">`,
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`<meta property="og:video:url" content="${external.url}">`,
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`<meta property="og:video:secure_url" content="${external.url}">`,
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`<meta property="og:video:width" content="${external.width}">`,
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`<meta property="og:video:height" content="${external.height}">`
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);
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}
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/* This Tweet contains a poll, so we'll render it */
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if (tweet.poll) {
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const { poll } = tweet;
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let barLength = 36;
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let str = '';
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/* Telegram Embeds are smaller, so we use a smaller bar to compensate */
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if (userAgent?.indexOf('Telegram') !== -1) {
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barLength = 24;
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}
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/* Render each poll choice */
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tweet.poll.choices.forEach(choice => {
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const bar = '█'.repeat((choice.percentage / 100) * barLength);
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// eslint-disable-next-line no-irregular-whitespace
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str += `${bar}\n${choice.label} (${choice.percentage}%)\n`;
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});
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/* Finally, add the footer of the poll with # of votes and time left */
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str += `\n${poll.total_votes} votes · ${poll.time_left_en}`;
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/* And now we'll put the poll right after the Tweet text! */
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newText += `\n\n${str}`;
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}
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/* This Tweet quotes another Tweet, so we'll render the other Tweet where possible */
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if (api.tweet?.quote) {
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const quoteText = handleQuote(api.tweet.quote);
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newText += `\n${quoteText}`;
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}
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/* If we have no media to display, instead we'll display the user profile picture in the embed */
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if (!tweet.media?.video && !tweet.media?.photos) {
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headers.push(
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/* Use a slightly higher resolution image for profile pics */
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`<meta property="og:image" content="${tweet.author.avatar_url?.replace(
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'_normal',
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'_200x200'
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)}"/>`,
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`<meta name="twitter:image" content="0"/>`
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);
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}
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/* Notice that user is using deprecated domain */
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if (flags?.deprecated) {
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siteName = Strings.DEPRECATED_DOMAIN_NOTICE;
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}
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/* Push basic headers relating to author, Tweet text, and site name */
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headers.push(
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`<meta content="${tweet.author.name} (@${tweet.author.screen_name})" property="og:title"/>`,
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`<meta content="${sanitizeText(newText)}" property="og:description"/>`,
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`<meta content="${siteName}" property="og:site_name"/>`
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);
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/* Special reply handling if authorText is not overriden */
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if (tweet.replying_to && authorText === Strings.DEFAULT_AUTHOR_TEXT) {
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authorText = `↪ Replying to @${tweet.replying_to}`;
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/* We'll assume it's a thread if it's a reply to themselves */
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} else if (tweet.replying_to === tweet.author.screen_name) {
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authorText = `↪ A part @${tweet.author.screen_name}'s thread`;
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}
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/* The additional oembed is pulled by Discord to enable improved embeds.
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Telegram does not use this. */
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headers.push(
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`<link rel="alternate" href="${Constants.HOST_URL}/owoembed?text=${encodeURIComponent(
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authorText.substring(0, 200)
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)}${flags?.deprecated ? '&deprecated=true' : ''}&status=${encodeURIComponent(
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status
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)}&author=${encodeURIComponent(
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tweet.author?.screen_name || ''
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)}" type="application/json+oembed" title="${tweet.author.name}">`
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);
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/* When dealing with a Tweet of unknown lang, fall back to en */
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const lang = tweet.lang === null ? 'en' : tweet.lang || 'en';
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/* Finally, after all that work we return the response HTML! */
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return {
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text: Strings.BASE_HTML.format({
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lang: `lang="${lang}"`,
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headers: headers.join('')
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})
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};
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};
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