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Introduce Markdown extensions (#1614)

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* Introduce markdown extensions

Signed-off-by: Tilman Vatteroth <git@tilmanvatteroth.de>
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Tilman Vatteroth 2021-11-15 17:04:49 +01:00 • committed by GitHub
parent e9defd60dc
commit 8a8bacc0aa
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src/components/markdown-renderer/markdown-extension/youtube/replace-youtube-link.ts Normal file
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/*
* SPDX-FileCopyrightText: 2021 The HedgeDoc developers (see AUTHORS file)
*
* SPDX-License-Identifier: AGPL-3.0-only
*/
import type { RegexOptions } from '../../../../external-types/markdown-it-regex/interface'
import { YoutubeMarkdownExtension } from './youtube-markdown-extension'
const protocolRegex = /(?:http(?:s)?:\/\/)?/
const subdomainRegex = /(?:www.)?/
const pathRegex = /(?:youtube(?:-nocookie)?\.com\/(?:[^\\/]+\/.+\/|(?:v|e(?:mbed)?)\/|.*[?&]v=)|youtu\.be\/)/
const idRegex = /([^"&?\\/\s]{11})/
const tailRegex = /(?:[?&#].*)?/
const youtubeVideoUrlRegex = new RegExp(
`(?:${protocolRegex.source}${subdomainRegex.source}${pathRegex.source}${idRegex.source}${tailRegex.source})`
)
const linkRegex = new RegExp(`^${youtubeVideoUrlRegex.source}$`, 'i')
export const replaceYouTubeLink: RegexOptions = {
name: 'youtube-link',
regex: linkRegex,
replace: (match) => {
// ESLint wants to collapse this tag, but then the tag won't be valid html anymore.
// noinspection CheckTagEmptyBody
return `<${YoutubeMarkdownExtension.tagName} id="${match}"></${YoutubeMarkdownExtension.tagName}>`
}
}