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// Copyright (c) 2015 Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
import $ from 'jquery';
import Constants from './constants.jsx';
import emojis from './emoji.json';
const emoticonPatterns = {
slightly_smiling_face: /(^|\s)(:-?\))(?=$|\s)/g, // :)
wink: /(^|\s)(;-?\))(?=$|\s)/g, // ;)
open_mouth: /(^|\s)(:o)(?=$|\s)/gi, // :o
scream: /(^|\s)(:-o)(?=$|\s)/gi, // :-o
smirk: /(^|\s)(:-?])(?=$|\s)/g, // :]
grinning: /(^|\s)(:-?d)(?=$|\s)/gi, // :D
stuck_out_tongue_closed_eyes: /(^|\s)(x-d)(?=$|\s)/gi, // x-d
stuck_out_tongue: /(^|\s)(:-?p)(?=$|\s)/gi, // :p
rage: /(^|\s)(:-?[\[@])(?=$|\s)/g, // :@
slightly_frowning_face: /(^|\s)(:-?\()(?=$|\s)/g, // :(
cry: /(^|\s)(:['’]-?\(|:'\(|:'\()(?=$|\s)/g, // :`(
confused: /(^|\s)(:-?\/)(?=$|\s)/g, // :/
confounded: /(^|\s)(:-?s)(?=$|\s)/gi, // :s
neutral_face: /(^|\s)(:-?\|)(?=$|\s)/g, // :|
flushed: /(^|\s)(:-?\$)(?=$|\s)/g, // :$
mask: /(^|\s)(:-x)(?=$|\s)/gi, // :-x
heart: /(^|\s)(<3|<3)(?=$|\s)/g, // <3
broken_heart: /(^|\s)(<\/3|</3)(?=$|\s)/g, // </3
thumbsup: /(^|\s)(:\+1:)(?=$|\s)/g, // :+1:
thumbsdown: /(^|\s)(:\-1:)(?=$|\s)/g // :-1:
};
let emoticonsByName;
let emoticonsByCodePoint;
function initializeEmoticons() {
emoticonsByName = new Map();
emoticonsByCodePoint = new Set();
for (const emoji of emojis) {
const unicode = emoji.emoji;
let filename = '';
if (unicode) {
// this is a unicode emoji so the character code determines the file name
let codepoint = '';
for (let i = 0; i < unicode.length; i += 2) {
const code = fixedCharCodeAt(unicode, i);
// ignore variation selector characters
if (code >= 0xfe00 && code <= 0xfe0f) {
continue;
}
// some emoji (such as country flags) span multiple unicode characters
if (i !== 0) {
codepoint += '-';
}
codepoint += pad(code.toString(16));
}
filename = codepoint;
emoticonsByCodePoint.add(codepoint);
} else {
// this isn't a unicode emoji so the first alias determines the file name
filename = emoji.aliases[0];
}
for (const alias of emoji.aliases) {
emoticonsByName.set(alias, {
alias,
path: getImagePathForEmoticon(filename)
});
}
}
}
// Pads a hexadecimal number with zeroes to be at least 4 digits long
function pad(n) {
if (n.length >= 4) {
return n;
}
// http://stackoverflow.com/questions/10073699/pad-a-number-with-leading-zeros-in-javascript
return ('0000' + n).slice(-4);
}
// Gets the unicode character code of a character starting at the given index in the string
// Adapted from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/charCodeAt
function fixedCharCodeAt(str, idx = 0) {
// ex. fixedCharCodeAt('\uD800\uDC00', 0); // 65536
// ex. fixedCharCodeAt('\uD800\uDC00', 1); // false
const code = str.charCodeAt(idx);
// High surrogate (could change last hex to 0xDB7F to treat high
// private surrogates as single characters)
if (code >= 0xD800 && code <= 0xDBFF) {
const hi = code;
const low = str.charCodeAt(idx + 1);
if (isNaN(low)) {
console.log('High surrogate not followed by low surrogate in fixedCharCodeAt()'); // eslint-disable-line
}
return ((hi - 0xD800) * 0x400) + (low - 0xDC00) + 0x10000;
}
if (code >= 0xDC00 && code <= 0xDFFF) { // Low surrogate
// We return false to allow loops to skip this iteration since should have
// already handled high surrogate above in the previous iteration
return false;
}
return code;
}
export function getEmoticonsByName() {
if (!emoticonsByName) {
initializeEmoticons();
}
return emoticonsByName;
}
export function getEmoticonsByCodePoint() {
if (!emoticonsByCodePoint) {
initializeEmoticons();
}
return emoticonsByCodePoint;
}
export function handleEmoticons(text, tokens) {
let output = text;
function replaceEmoticonWithToken(fullMatch, prefix, matchText, name) {
if (getEmoticonsByName().has(name)) {
const index = tokens.size;
const alias = `MM_EMOTICON${index}`;
const path = getEmoticonsByName().get(name).path;
tokens.set(alias, {
value: `<img align="absmiddle" alt="${matchText}" class="emoticon" src="${path}" title="${matchText}" />`,
originalText: fullMatch
});
return prefix + alias;
}
return fullMatch;
}
output = output.replace(/(^|\s)(:([a-zA-Z0-9_-]+):)(?=$|\s)/g, (fullMatch, prefix, matchText, name) => replaceEmoticonWithToken(fullMatch, prefix, matchText, name));
$.each(emoticonPatterns, (name, pattern) => {
// this might look a bit funny, but since the name isn't contained in the actual match
// like with the named emoticons, we need to add it in manually
output = output.replace(pattern, (fullMatch, prefix, matchText) => replaceEmoticonWithToken(fullMatch, prefix, matchText, name));
});
return output;
}
export function getImagePathForEmoticon(name) {
return Constants.EMOJI_PATH + '/' + name + '.png';
}
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