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import { unicodeMapping } from './emojione_light';
import Trie from 'substring-trie';
const trie = new Trie(Object.keys(unicodeMapping));
const assetHost = process.env.CDN_HOST || '';
const emojify = (str, customEmojis = {}) => {
let rtn = '';
for (;;) {
let match, i = 0, tag;
while (i < str.length && (tag = '<&'.indexOf(str[i])) === -1 && str[i] !== ':' && !(match = trie.search(str.slice(i)))) {
i += str.codePointAt(i) < 65536 ? 1 : 2;
}
if (i === str.length)
break;
else if (tag >= 0) {
const tagend = str.indexOf('>;'[tag], i + 1) + 1;
if (!tagend)
break;
rtn += str.slice(0, tagend);
str = str.slice(tagend);
} else if (str[i] === ':') {
try {
// if replacing :shortname: succeed, exit this block with "continue"
const closeColon = str.indexOf(':', i + 1) + 1;
if (!closeColon) throw null; // no pair of ':'
const lt = str.indexOf('<', i + 1);
if (!(lt === -1 || lt >= closeColon)) throw null; // tag appeared before closing ':'
const shortname = str.slice(i, closeColon);
if (shortname in customEmojis) {
rtn += str.slice(0, i) + `<img draggable="false" class="emojione" alt="${shortname}" title="${shortname}" src="${customEmojis[shortname]}" />`;
str = str.slice(closeColon);
continue;
}
} catch (e) {}
// replacing :shortname: failed
rtn += str.slice(0, i + 1);
str = str.slice(i + 1);
} else {
const [filename, shortCode] = unicodeMapping[match];
rtn += str.slice(0, i) + `<img draggable="false" class="emojione" alt="${match}" title=":${shortCode}:" src="${assetHost}/emoji/${filename}.svg" />`;
str = str.slice(i + match.length);
}
}
return rtn + str;
};
export default emojify;
export const buildCustomEmojis = customEmojis => {
const emojis = [];
customEmojis.forEach(emoji => {
const shortcode = emoji.get('shortcode');
const url = emoji.get('url');
const name = shortcode.replace(':', '');
emojis.push({
id: name,
name,
short_names: [name],
text: '',
emoticons: [],
keywords: [name],
imageUrl: url,
custom: true,
});
});
return emojis;
};
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