diff options
Diffstat (limited to 'src/classes/MessageFormatting.ts')
| -rw-r--r-- | src/classes/MessageFormatting.ts | 118 |
1 files changed, 117 insertions, 1 deletions
diff --git a/src/classes/MessageFormatting.ts b/src/classes/MessageFormatting.ts index 88df999..a05351d 100644 --- a/src/classes/MessageFormatting.ts +++ b/src/classes/MessageFormatting.ts @@ -1,4 +1,5 @@ import {MessageFormattingRule} from "./MessageFormattingRule"; +import {marked} from "marked"; /** * A collection of rules to apply formatting styles to a message @@ -38,5 +39,120 @@ export class MessageFormatting { return mf; } - //public static fromMarkdown() {} + /** + * Transform a Markdown-formatted text into a plain text string + * that can be easily displayed. + * + * @param text - The text to use + */ + public static plainFromMarkdown(text: string) { + let renderer = {}; + text = text.replaceAll(/(?<!\n)<br>/gmi, "\n").replaceAll("<br>", "").replace(/(```)(.*)(\n)/gm, "$1$3").replace(/#+( |)(.*)/gm, "**$2**"); + + renderer['strong'] = renderer['em'] = renderer['codespan'] = renderer['code'] = renderer['del'] = renderer['tablerow'] = renderer['tablecell'] = renderer['heading'] = renderer['blockquote'] = (text) => text; + renderer['hr'] = () => "—————————"; + renderer['link'] = (href, title, text) => (title ?? text) + ": " + href; + renderer['text'] = (text) => text.replace(/^( *)\* *(.*)/gm, "$1- $2"); + + marked.use({ + async: false, + mangle: false, + headerIds: false, + renderer + }); + + return marked.parseInline(text).replaceAll("<br>", "\n").replace(/&#(\d+);/g, function(match, dec) { + return String.fromCharCode(dec); + }).replaceAll("<u>", "").replaceAll("</u>", "").replaceAll("\\<u>", "<u>").replaceAll("\\</u>", "</u>"); + } + + /** + * Transform a Markdown-formatted text into a {@link MessageFormatting}, + * converting the compatible formatting options. + * + * @param text - The text to use + * @experimental + */ + public static fromMarkdown(text: string) { + let plain = MessageFormatting.plainFromMarkdown(text); + let styles = []; + text = text.replaceAll(/(?<!\n)<br>/gmi, "\n").replaceAll("<br>", "").replace(/(```)(.*)(\n)/gm, "$1$3").replace(/#+( |)(.*)/gm, "**$2**"); + + let renderer = {}; + renderer['strong'] = (text) => { + let start = -1; + // @ts-ignore + while (plain.replace(text, (_, offset) => { start = offset; return '\x00'.repeat(text.length); }) !== plain) { + start = -1; + plain = plain.replace(text, (_, offset) => { start = offset; return '\x00'.repeat(text.length); }); + + styles.push({ + style: "BOLD", + start, + length: text.length + }); + + start = -1; + } + }; + renderer['em'] = (text) => { + let start = -1; + // @ts-ignore + while (plain.replace(text, (_, offset) => { start = offset; return '\x00'.repeat(text.length); }) !== plain) { + start = -1; + plain = plain.replace(text, (_, offset) => { start = offset; return '\x00'.repeat(text.length); }); + + styles.push({ + style: "ITALIC", + start, + length: text.length + }); + + start = -1; + } + }; + renderer['codespan'] = renderer['code'] = (text) => { + let start = -1; + // @ts-ignore + while (plain.replace(text, (_, offset) => { start = offset; return '\x00'.repeat(text.length); }) !== plain) { + start = -1; + plain = plain.replace(text, (_, offset) => { start = offset; return '\x00'.repeat(text.length); }); + + styles.push({ + style: "MONOSPACE", + start, + length: text.length + }); + + start = -1; + } + }; + renderer['del'] = () => { + let start = -1; + // @ts-ignore + while (plain.replace(text, (_, offset) => { start = offset; return '\x00'.repeat(text.length); }) !== plain) { + start = -1; + plain = plain.replace(text, (_, offset) => { start = offset; return '\x00'.repeat(text.length); }); + + styles.push({ + style: "STRIKETHROUGH", + start, + length: text.length + }); + + start = -1; + } + }; + + marked.use({ + async: false, + mangle: false, + headerIds: false, + renderer + }); + + marked.parseInline(text); + styles = styles.filter(i => i.start !== -1); + return new MessageFormatting(plain, styles); + } }
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