import { Injectable } from '@angular/core'
-
+import { buildVideoLink } from '../../../assets/player/utils'
+import { HtmlRendererService } from '@app/shared/renderer/html-renderer.service'
import * as MarkdownIt from 'markdown-it'
+type MarkdownParsers = {
+ textMarkdownIt: MarkdownIt
+ textWithHTMLMarkdownIt: MarkdownIt
+
+ enhancedMarkdownIt: MarkdownIt
+ enhancedWithHTMLMarkdownIt: MarkdownIt
+
+ completeMarkdownIt: MarkdownIt
+}
+
+type MarkdownConfig = {
+ rules: string[]
+ html: boolean
+ escape?: boolean
+}
+
+type MarkdownParserConfigs = {
+ [id in keyof MarkdownParsers]: MarkdownConfig
+}
+
@Injectable()
export class MarkdownService {
static TEXT_RULES = [
'newline',
'list'
]
+ static TEXT_WITH_HTML_RULES = MarkdownService.TEXT_RULES.concat([ 'html_inline', 'html_block' ])
+
static ENHANCED_RULES = MarkdownService.TEXT_RULES.concat([ 'image' ])
+ static ENHANCED_WITH_HTML_RULES = MarkdownService.TEXT_WITH_HTML_RULES.concat([ 'image' ])
- private textMarkdownIt: MarkdownIt.MarkdownIt
- private enhancedMarkdownIt: MarkdownIt.MarkdownIt
+ static COMPLETE_RULES = MarkdownService.ENHANCED_WITH_HTML_RULES.concat([ 'block', 'inline', 'heading', 'paragraph' ])
- constructor () {
- this.textMarkdownIt = this.createMarkdownIt(MarkdownService.TEXT_RULES)
- this.enhancedMarkdownIt = this.createMarkdownIt(MarkdownService.ENHANCED_RULES)
+ private markdownParsers: MarkdownParsers = {
+ textMarkdownIt: null,
+ textWithHTMLMarkdownIt: null,
+ enhancedMarkdownIt: null,
+ enhancedWithHTMLMarkdownIt: null,
+ completeMarkdownIt: null
}
+ private parsersConfig: MarkdownParserConfigs = {
+ textMarkdownIt: { rules: MarkdownService.TEXT_RULES, html: false },
+ textWithHTMLMarkdownIt: { rules: MarkdownService.TEXT_WITH_HTML_RULES, html: true, escape: true },
- textMarkdownToHTML (markdown: string) {
- if (!markdown) return ''
+ enhancedMarkdownIt: { rules: MarkdownService.ENHANCED_RULES, html: false },
+ enhancedWithHTMLMarkdownIt: { rules: MarkdownService.ENHANCED_WITH_HTML_RULES, html: true, escape: true },
+
+ completeMarkdownIt: { rules: MarkdownService.COMPLETE_RULES, html: true }
+ }
+
+ constructor (private htmlRenderer: HtmlRendererService) {}
- const html = this.textMarkdownIt.render(markdown)
- return this.avoidTruncatedTags(html)
+ textMarkdownToHTML (markdown: string, withHtml = false) {
+ if (withHtml) return this.render('textWithHTMLMarkdownIt', markdown)
+
+ return this.render('textMarkdownIt', markdown)
+ }
+
+ enhancedMarkdownToHTML (markdown: string, withHtml = false) {
+ if (withHtml) return this.render('enhancedWithHTMLMarkdownIt', markdown)
+
+ return this.render('enhancedMarkdownIt', markdown)
+ }
+
+ completeMarkdownToHTML (markdown: string) {
+ return this.render('completeMarkdownIt', markdown)
+ }
+
+ async processVideoTimestamps (html: string) {
+ return html.replace(/((\d{1,2}):)?(\d{1,2}):(\d{1,2})/g, function (str, _, h, m, s) {
+ const t = (3600 * +(h || 0)) + (60 * +(m || 0)) + (+(s || 0))
+ const url = buildVideoLink({ startTime: t })
+ return `<a class="video-timestamp" href="${url}">${str}</a>`
+ })
}
- enhancedMarkdownToHTML (markdown: string) {
+ private async render (name: keyof MarkdownParsers, markdown: string) {
if (!markdown) return ''
- const html = this.enhancedMarkdownIt.render(markdown)
- return this.avoidTruncatedTags(html)
+ const config = this.parsersConfig[ name ]
+ if (!this.markdownParsers[ name ]) {
+ this.markdownParsers[ name ] = await this.createMarkdownIt(config)
+ }
+
+ let html = this.markdownParsers[ name ].render(markdown)
+ html = this.avoidTruncatedTags(html)
+
+ if (config.escape) return this.htmlRenderer.toSafeHtml(html)
+
+ return html
}
- private createMarkdownIt (rules: string[]) {
- const markdownIt = new MarkdownIt('zero', { linkify: true, breaks: true })
+ private async createMarkdownIt (config: MarkdownConfig) {
+ // FIXME: import('...') returns a struct module, containing a "default" field
+ const MarkdownItClass: typeof import ('markdown-it') = (await import('markdown-it') as any).default
+
+ const markdownIt = new MarkdownItClass('zero', { linkify: true, breaks: true, html: config.html })
- for (let rule of rules) {
+ for (const rule of config.rules) {
markdownIt.enable(rule)
}
return markdownIt
}
- private setTargetToLinks (markdownIt: MarkdownIt.MarkdownIt) {
+ private setTargetToLinks (markdownIt: MarkdownIt) {
// Snippet from markdown-it documentation: https://github.com/markdown-it/markdown-it/blob/master/docs/architecture.md#renderer
const defaultRender = markdownIt.renderer.rules.link_open || function (tokens, idx, options, env, self) {
return self.renderToken(tokens, idx, options)
private avoidTruncatedTags (html: string) {
return html.replace(/\*\*?([^*]+)$/, '$1')
.replace(/<a[^>]+>([^<]+)<\/a>\s*...((<\/p>)|(<\/li>)|(<\/strong>))?$/mi, '$1...')
- .replace(/\[[^\]]+\]?\(?([^\)]+)$/, '$1')
-
+ .replace(/\[[^\]]+\]\(([^\)]+)$/m, '$1')
+ .replace(/\s?\[[^\]]+\]?[.]{3}<\/p>$/m, '...</p>')
}
}