93 lines
2.7 KiB
JavaScript
93 lines
2.7 KiB
JavaScript
import { execPipe, asyncFilter, asyncMap } from 'iter-tools'
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import { share } from '/src/routes.js'
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const intersection = (xs, ys) => xs.filter(x => ys.includes(x))
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const difference = (xs, ys) => xs.filter(x => !ys.includes(x))
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const symmetricDifference = (xs, ys) => [...difference(xs, ys), ...difference(ys, xs)]
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export const mapNullable = (nullable, f) => nullable === null ? nullable : f(nullable)
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export const tap = f => x => {
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f(x)
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return x
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}
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export const defer = () => {
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let resolve
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let reject
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const promise = new Promise((res, rej) => {
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resolve = res
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reject = rej
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})
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return { resolve, reject, promise }
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}
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export const queue = () => {
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const deferred = defer()
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let promise = deferred.promise
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const enqueue = f => {
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promise = promise.then(tap(f))
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return promise
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}
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return { enqueue, run: deferred.resolve }
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}
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export const secondsToElapsedTime = (seconds) => {
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const parts = [
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Math.floor(seconds / 3600),
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Math.floor(seconds / 60) % 60,
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Math.floor(seconds) % 60
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]
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return parts
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.filter((value, index) => value > 0 || index > 0)
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.map(value => value < 10 ? '0' + value : value)
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.join(':')
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}
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export async function* tracksIterator(partialTrackGenerator, cache) {
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const notKnow = (values) => {
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if (cache.has(values)) {
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console.log(`Drop already processed ${values.join(':')}`)
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return false
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} else {
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cache.add(values)
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return true
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}
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}
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try {
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yield* execPipe(
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partialTrackGenerator,
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asyncFilter(({ referer: { credentials: { domain, id } } }) => notKnow(['referer', 'mastodon', domain, id])),
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asyncFilter(({ partialMedia: { credentials: { id } } }) => notKnow(['media', 'youtube', id])),
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asyncMap(async ({ referer, partialMedia }) => {
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const metadata = await fetchMetadata(partialMedia.credentials)
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return {
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shareUrl: `${location.origin}${share.reverse({ domain: referer.credentials.domain, id: referer.credentials.id })}`,
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referer,
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media: {
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title: metadata.title,
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url: partialMedia.url,
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cover: `https://img.youtube.com/vi/${partialMedia.credentials.id}/mqdefault.jpg`,
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credentials: partialMedia.credentials
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}
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}
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})
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)
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} finally {
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partialTrackGenerator.return()
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}
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}
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const fetchMetadata = (credentials) => {
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return fetch(`https://noembed.com/embed?url=https://www.youtube.com/watch?v=${credentials.id}`)
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.then(response => response.json())
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}
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