import { autoPlayGif } from '../../initial_state'; import unicodeMapping from './emoji_unicode_mapping_light'; import Trie from 'substring-trie'; const trie = new Trie(Object.keys(unicodeMapping)); const assetHost = process.env.CDN_HOST || ''; const emojify = (str, customEmojis = {}) => { const tagCharsWithoutEmojis = '<&'; const tagCharsWithEmojis = Object.keys(customEmojis).length ? '<&:' : '<&'; let rtn = '', tagChars = tagCharsWithEmojis, invisible = 0; for (;;) { let match, i = 0, tag; while (i < str.length && (tag = tagChars.indexOf(str[i])) === -1 && (invisible || !(match = trie.search(str.slice(i))))) { i += str.codePointAt(i) < 65536 ? 1 : 2; } let rend, replacement = ''; if (i === str.length) { break; } else if (str[i] === ':') { if (!(() => { rend = str.indexOf(':', i + 1) + 1; if (!rend) return false; // no pair of ':' const lt = str.indexOf('<', i + 1); if (!(lt === -1 || lt >= rend)) return false; // tag appeared before closing ':' const shortname = str.slice(i, rend); // now got a replacee as ':shortname:' // if you want additional emoji handler, add statements below which set replacement and return true. if (shortname in customEmojis) { const filename = autoPlayGif ? customEmojis[shortname].url : customEmojis[shortname].static_url; replacement = `<img draggable="false" class="emojione" alt="${shortname}" title="${shortname}" src="${filename}" />`; return true; } return false; })()) rend = ++i; } else if (tag >= 0) { // <, & rend = str.indexOf('>;'[tag], i + 1) + 1; if (!rend) { break; } if (tag === 0) { if (invisible) { if (str[i + 1] === '/') { // closing tag if (!--invisible) { tagChars = tagCharsWithEmojis; } } else if (str[rend - 2] !== '/') { // opening tag invisible++; } } else { if (str.startsWith('<span class="invisible">', i)) { // avoid emojifying on invisible text invisible = 1; tagChars = tagCharsWithoutEmojis; } } } i = rend; } else { // matched to unicode emoji const { filename, shortCode } = unicodeMapping[match]; const title = shortCode ? `:${shortCode}:` : ''; replacement = `<img draggable="false" class="emojione" alt="${match}" title="${title}" src="${assetHost}/emoji/${filename}.svg" />`; rend = i + match.length; } rtn += str.slice(0, i) + replacement; str = str.slice(rend); } return rtn + str; }; export default emojify; export const buildCustomEmojis = (customEmojis) => { const emojis = []; customEmojis.forEach(emoji => { const shortcode = emoji.get('shortcode'); const url = autoPlayGif ? emoji.get('url') : emoji.get('static_url'); const name = shortcode.replace(':', ''); emojis.push({ id: name, name, short_names: [name], text: '', emoticons: [], keywords: [name], imageUrl: url, custom: true, }); }); return emojis; };