element-web-Github/src/emoji.js

/*
Copyright 2019 The Matrix.org Foundation C.I.C.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

import EMOJIBASE from 'emojibase-data/en/compact.json';

export const VARIATION_SELECTOR = String.fromCharCode(0xFE0F);

// The unicode is stored without the variant selector
const UNICODE_TO_EMOJI = new Map(); // not exported as gets for it are handled by getEmojiFromUnicode
export const EMOTICON_TO_EMOJI = new Map();
export const SHORTCODE_TO_EMOJI = new Map();

export const getEmojiFromUnicode = unicode => UNICODE_TO_EMOJI.get(unicode.replace(VARIATION_SELECTOR, ""));

const EMOJIBASE_GROUP_ID_TO_CATEGORY = [
    "people", // smileys
    "people", // actually people
    "control", // modifiers and such, not displayed in picker
    "nature",
    "foods",
    "places",
    "activity",
    "objects",
    "symbols",
    "flags",
];

export const DATA_BY_CATEGORY = {
    "people": [],
    "nature": [],
    "foods": [],
    "places": [],
    "activity": [],
    "objects": [],
    "symbols": [],
    "flags": [],
};

// Store various mappings from unicode/emoticon/shortcode to the Emoji objects
EMOJIBASE.forEach(emoji => {
    if (emoji.unicode.includes(VARIATION_SELECTOR)) {
        // Clone data into variation-less version
        emoji = Object.assign({}, emoji, {
            unicode: emoji.unicode.replace(VARIATION_SELECTOR, ""),
        });
    }

    const categoryId = EMOJIBASE_GROUP_ID_TO_CATEGORY[emoji.group];
    if (DATA_BY_CATEGORY.hasOwnProperty(categoryId)) {
        DATA_BY_CATEGORY[categoryId].push(emoji);
    }
    // This is used as the string to match the query against when filtering emojis
    emoji.filterString = `${emoji.annotation}\n${emoji.shortcodes.join('\n')}}\n${emoji.emoticon || ''}`.toLowerCase();

    // Add mapping from unicode to Emoji object
    UNICODE_TO_EMOJI.set(emoji.unicode, emoji);

    if (emoji.emoticon) {
        // Add mapping from emoticon to Emoji object
        EMOTICON_TO_EMOJI.set(emoji.emoticon, emoji);
    }

    if (emoji.shortcodes) {
        // Add mapping from each shortcode to Emoji object
        emoji.shortcodes.forEach(shortcode => {
            SHORTCODE_TO_EMOJI.set(shortcode, emoji);
        });
    }
});