misskey/src/web/app/common/scripts/text-compiler.js

import * as riot from 'riot';
const pictograph = require('pictograph');
import CONFIG from './config';

const escape = text =>
	text
		.replace(/>/g, '>')
		.replace(/</g, '&lt;');

export default (tokens, shouldBreak) => {
	if (shouldBreak == null) {
		shouldBreak = true;
	}

	const me = riot.mixin('i').me;

	let text = tokens.map(token => {
		switch (token.type) {
			case 'text':
				return escape(token.content)
					.replace(/(\r\n|\n|\r)/g, shouldBreak ? '<br>' : ' ');
			case 'bold':
				return `<strong>${escape(token.bold)}</strong>`;
			case 'url':
				return `<mk-url href="${escape(token.content)}" target="_blank"/>`;
			case 'link':
				return `<a class="link" href="${escape(token.url)}" target="_blank" title="${escape(token.url)}">${escape(token.title)}</a>`;
			case 'mention':
				return `<a href="${CONFIG.url + '/' + escape(token.username)}" target="_blank" data-user-preview="${token.content}" ${me && me.username == token.username ? 'data-is-me' : ''}>${token.content}</a>`;
			case 'hashtag': // TODO
				return `<a>${escape(token.content)}</a>`;
			case 'code':
				return `<pre><code>${token.html}</code></pre>`;
			case 'inline-code':
				return `<code>${token.html}</code>`;
			case 'emoji':
				return pictograph.dic[token.emoji] || token.content;
		}
	}).join('');

	// Remove needless whitespaces
	text = text
		.replace(/ <code>/g, '<code>').replace(/<\/code> /g, '</code>')
		.replace(/<br><code><pre>/g, '<code><pre>').replace(/<\/code><\/pre><br>/g, '</code></pre>');

	return text;
};