hometown/app/javascript/mastodon/features/emoji/emoji_compressed.js

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// @preval
// http://www.unicode.org/Public/emoji/5.0/emoji-test.txt
// This file contains the compressed version of the emoji data from
// both emoji_map.json and from emoji-mart's emojiIndex and data objects.
// It's designed to be emitted in an array format to take up less space
// over the wire.
const { unicodeToFilename } = require('./unicode_to_filename');
const { unicodeToUnifiedName } = require('./unicode_to_unified_name');
const emojiMap = require('./emoji_map.json');
const { emojiIndex } = require('emoji-mart');
const { default: emojiMartData } = require('emoji-mart/dist/data');
const excluded = ['®', '©', '™'];
const skins = ['🏻', '🏼', '🏽', '🏾', '🏿'];
const shortcodeMap = {};
const shortCodesToEmojiData = {};
const emojisWithoutShortCodes = [];
Object.keys(emojiIndex.emojis).forEach(key => {
shortcodeMap[emojiIndex.emojis[key].native] = emojiIndex.emojis[key].id;
});
const stripModifiers = unicode => {
skins.forEach(tone => {
unicode = unicode.replace(tone, '');
});
return unicode;
};
Object.keys(emojiMap).forEach(key => {
if (excluded.includes(key)) {
delete emojiMap[key];
return;
}
const normalizedKey = stripModifiers(key);
let shortcode = shortcodeMap[normalizedKey];
if (!shortcode) {
shortcode = shortcodeMap[normalizedKey + '\uFE0F'];
}
const filename = emojiMap[key];
const filenameData = [key];
if (unicodeToFilename(key) !== filename) {
// filename can't be derived using unicodeToFilename
filenameData.push(filename);
}
if (typeof shortcode === 'undefined') {
emojisWithoutShortCodes.push(filenameData);
} else {
if (!Array.isArray(shortCodesToEmojiData[shortcode])) {
shortCodesToEmojiData[shortcode] = [[]];
}
shortCodesToEmojiData[shortcode][0].push(filenameData);
}
});
Object.keys(emojiIndex.emojis).forEach(key => {
const { native } = emojiIndex.emojis[key];
const { short_names, search, unified } = emojiMartData.emojis[key];
if (short_names[0] !== key) {
throw new Error('The compresser expects the first short_code to be the ' +
'key. It may need to be rewritten if the emoji change such that this ' +
'is no longer the case.');
}
short_names.splice(0, 1); // first short name can be inferred from the key
const searchData = [native, short_names, search];
if (unicodeToUnifiedName(native) !== unified) {
// unified name can't be derived from unicodeToUnifiedName
searchData.push(unified);
}
shortCodesToEmojiData[key].push(searchData);
});
// JSON.parse/stringify is to emulate what @preval is doing and avoid any
// inconsistent behavior in dev mode
module.exports = JSON.parse(JSON.stringify([
shortCodesToEmojiData,
emojiMartData.skins,
emojiMartData.categories,
emojiMartData.short_names,
emojisWithoutShortCodes,
]));