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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 = {}) => {
let rtn = '';
for (;;) {
let match, i = 0, tag;
while (i < str.length && (tag = '<&:'.indexOf(str[i])) === -1 && !(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) {
replacement = `<img draggable="false" class="emojione" alt="${shortname}" title="${shortname}" src="${customEmojis[shortname]}" />`;
return true;
}
return false;
})()) rend = ++i;
} else if (tag >= 0) { // <, &
rend = str.indexOf('>;'[tag], i + 1) + 1;
if (!rend) break;
i = rend;
} else { // matched to unicode emoji
const { filename, shortCode } = unicodeMapping[match];
const title = shortCode ? `:${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 = 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;
};
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