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34 lines
1.3 KiB
TypeScript
34 lines
1.3 KiB
TypeScript
/*
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* SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
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*
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* SPDX-License-Identifier: AGPL-3.0-only
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*/
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import type { RegexOptions } from '../../../../external-types/markdown-it-regex/interface'
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import { YoutubeMarkdownExtension } from './youtube-markdown-extension'
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import markdownItRegex from 'markdown-it-regex'
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import type MarkdownIt from 'markdown-it'
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const protocolRegex = /(?:http(?:s)?:\/\/)?/
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const subdomainRegex = /(?:www.)?/
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const pathRegex = /(?:youtube(?:-nocookie)?\.com\/(?:[^\\/]+\/.+\/|(?:v|e(?:mbed)?)\/|.*[?&]v=)|youtu\.be\/)/
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const idRegex = /([^"&?\\/\s]{11})/
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const tailRegex = /(?:[?&#].*)?/
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const youtubeVideoUrlRegex = new RegExp(
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`(?:${protocolRegex.source}${subdomainRegex.source}${pathRegex.source}${idRegex.source}${tailRegex.source})`
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)
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const linkRegex = new RegExp(`^${youtubeVideoUrlRegex.source}$`, 'i')
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/**
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* Replacer for youtube links.
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*/
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export const replaceYouTubeLinkMarkdownItPlugin: MarkdownIt.PluginSimple = (markdownIt: MarkdownIt) =>
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markdownItRegex(markdownIt, {
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name: 'youtube-link',
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regex: linkRegex,
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replace: (match) => {
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// ESLint wants to collapse this tag, but then the tag won't be valid html anymore.
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// noinspection CheckTagEmptyBody
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return `<${YoutubeMarkdownExtension.tagName} id="${match}"></${YoutubeMarkdownExtension.tagName}>`
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}
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} as RegexOptions)
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