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1 | import { getDefaultSanitizeOptions, getTextOnlySanitizeOptions, TEXT_WITH_HTML_RULES } from '@shared/core-utils' | |
2 | ||
3 | const defaultSanitizeOptions = getDefaultSanitizeOptions() | |
4 | const textOnlySanitizeOptions = getTextOnlySanitizeOptions() | |
5 | ||
6 | const sanitizeHtml = require('sanitize-html') | |
7 | const markdownItEmoji = require('markdown-it-emoji/light') | |
8 | const MarkdownItClass = require('markdown-it') | |
9 | ||
10 | const markdownItWithHTML = new MarkdownItClass('default', { linkify: true, breaks: true, html: true }) | |
11 | const markdownItWithoutHTML = new MarkdownItClass('default', { linkify: true, breaks: true, html: false }) | |
12 | ||
13 | const toSafeHtml = (text: string) => { | |
14 | if (!text) return '' | |
15 | ||
16 | // Restore line feed | |
17 | const textWithLineFeed = text.replace(/<br.?\/?>/g, '\r\n') | |
18 | ||
19 | // Convert possible markdown (emojis, emphasis and lists) to html | |
20 | const html = markdownItWithHTML.enable(TEXT_WITH_HTML_RULES) | |
21 | .use(markdownItEmoji) | |
22 | .render(textWithLineFeed) | |
23 | ||
24 | // Convert to safe Html | |
25 | return sanitizeHtml(html, defaultSanitizeOptions) | |
26 | } | |
27 | ||
28 | const mdToOneLinePlainText = (text: string) => { | |
29 | if (!text) return '' | |
30 | ||
31 | markdownItWithoutHTML.use(markdownItEmoji) | |
32 | .use(plainTextPlugin) | |
33 | .render(text) | |
34 | ||
35 | // Convert to safe Html | |
36 | return sanitizeHtml(markdownItWithoutHTML.plainText, textOnlySanitizeOptions) | |
37 | } | |
38 | ||
39 | // --------------------------------------------------------------------------- | |
40 | ||
41 | export { | |
42 | toSafeHtml, | |
43 | mdToOneLinePlainText | |
44 | } | |
45 | ||
46 | // --------------------------------------------------------------------------- | |
47 | ||
48 | // Thanks: https://github.com/wavesheep/markdown-it-plain-text | |
49 | function plainTextPlugin (markdownIt: any) { | |
50 | let lastSeparator = '' | |
51 | ||
52 | function plainTextRule (state: any) { | |
53 | const text = scan(state.tokens) | |
54 | ||
55 | markdownIt.plainText = text.replace(/\s+/g, ' ') | |
56 | } | |
57 | ||
58 | function scan (tokens: any[]) { | |
59 | let text = '' | |
60 | ||
61 | for (const token of tokens) { | |
62 | if (token.children !== null) { | |
63 | text += scan(token.children) | |
64 | continue | |
65 | } | |
66 | ||
67 | if (token.type === 'list_item_close') { | |
68 | lastSeparator = ', ' | |
69 | } else if (/[a-zA-Z]+_close/.test(token.type)) { | |
70 | lastSeparator = ' ' | |
71 | } else if (token.content) { | |
72 | text += lastSeparator | |
73 | text += token.content | |
74 | } | |
75 | } | |
76 | ||
77 | return text | |
78 | } | |
79 | ||
80 | markdownIt.core.ruler.push('plainText', plainTextRule) | |
81 | } |