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| const _ = require('lodash');
const request = require('superagent');
/** Link to Twitch Emotes API. */
const TWITCH_EMOTES = 'https://twitchemotes.com/api_cache/v2/images.json';
/** Image template for Twitch emotes. */
const LINK_TEMPLATE = [
'https://static-cdn.jtvnw.net/emoticons/v1/{imageID}/1.0',
'https://static-cdn.jtvnw.net/emoticons/v1/{imageID}/2.0',
'https://static-cdn.jtvnw.net/emoticons/v1/{imageID}/3.0'
];
/** Link to BTTV global emotes. */
const BTTV_EMOTES = 'https://api.betterttv.net/2/emotes';
/** Link to BTTV channels. */
const BTTV_CHANNELS = 'https://api.betterttv.net/2/channels/{channelName}';
/** Image template for BTTV emotes. */
const BTTV_TEMPLATE = [
'https://cdn.betterttv.net/emote/{imageID}/1x',
'https://cdn.betterttv.net/emote/{imageID}/2x',
'https://cdn.betterttv.net/emote/{imageID}/3x'
];
/** For use in parsing, a big regex. */
const PUNCTUATIONS = "([\\w\\d]+)|(\\s)|([\\$\\uFFE5\\^\\+=`~<>{}\\[\\]|\\u3000-\\u303F!-#%-\\x2A,-\\/:;\\x3F@\\x5B-\\x5D_\\x7B}\\u00A1\\u00A7\\u00AB\\u00B6\\u00B7\\u00BB\\u00BF\\u037E\\u0387\\u055A-\\u055F\\u0589\\u058A\\u05BE\\u05C0\\u05C3\\u05C6\\u05F3\\u05F4\\u0609\\u060A\\u060C\\u060D\\u061B\\u061E\\u061F\\u066A-\\u066D\\u06D4\\u0700-\\u070D\\u07F7-\\u07F9\\u0830-\\u083E\\u085E\\u0964\\u0965\\u0970\\u0AF0\\u0DF4\\u0E4F\\u0E5A\\u0E5B\\u0F04-\\u0F12\\u0F14\\u0F3A-\\u0F3D\\u0F85\\u0FD0-\\u0FD4\\u0FD9\\u0FDA\\u104A-\\u104F\\u10FB\\u1360-\\u1368\\u1400\\u166D\\u166E\\u169B\\u169C\\u16EB-\\u16ED\\u1735\\u1736\\u17D4-\\u17D6\\u17D8-\\u17DA\\u1800-\\u180A\\u1944\\u1945\\u1A1E\\u1A1F\\u1AA0-\\u1AA6\\u1AA8-\\u1AAD\\u1B5A-\\u1B60\\u1BFC-\\u1BFF\\u1C3B-\\u1C3F\\u1C7E\\u1C7F\\u1CC0-\\u1CC7\\u1CD3\\u2010-\\u2027\\u2030-\\u2043\\u2045-\\u2051\\u2053-\\u205E\\u207D\\u207E\\u208D\\u208E\\u2329\\u232A\\u2768-\\u2775\\u27C5\\u27C6\\u27E6-\\u27EF\\u2983-\\u2998\\u29D8-\\u29DB\\u29FC\\u29FD\\u2CF9-\\u2CFC\\u2CFE\\u2CFF\\u2D70\\u2E00-\\u2E2E\\u2E30-\\u2E3B\\u3001-\\u3003\\u3008-\\u3011\\u3014-\\u301F\\u3030\\u303D\\u30A0\\u30FB\\uA4FE\\uA4FF\\uA60D-\\uA60F\\uA673\\uA67E\\uA6F2-\\uA6F7\\uA874-\\uA877\\uA8CE\\uA8CF\\uA8F8-\\uA8FA\\uA92E\\uA92F\\uA95F\\uA9C1-\\uA9CD\\uA9DE\\uA9DF\\uAA5C-\\uAA5F\\uAADE\\uAADF\\uAAF0\\uAAF1\\uABEB\\uFD3E\\uFD3F\\uFE10-\\uFE19\\uFE30-\\uFE52\\uFE54-\\uFE61\\uFE63\\uFE68\\uFE6A\\uFE6B\\uFF01-\\uFF03\\uFF05-\\uFF0A\\uFF0C-\\uFF0F\\uFF1A\\uFF1B\\uFF1F\\uFF20\\uFF3B-\\uFF3D\\uFF3F\\uFF5B\\uFF5D\\uFF5F-\\uFF65])+";
/** Template for parse formats. */
const FORMAT_TEMPLATE = {
HTML: '<img class="twitch-emote twitch-emote-{size} src={link}">',
MARKDOWN: '',
BBCODE: '[img]{link}[/img]',
PLAIN: '{link}'
};
/** Channel name for global Twitch emotes. */
const TWITCH_GLOBAL = 'global/twitch';
/** Channel name for global BTTV emotes. */
const BTTV_GLOBAL = 'global/bttv';
/** Utility class. Extends Map. */
class Cache extends Map {
/**
* Creates a new Cache.
* @param iterable - An iterable.
*/
constructor(iterable){
super(iterable);
}
/**
* Finds first matching value by property or function.
* @param propOrFunc - Property or function to test.
* @param value - Value to find.
* @return The first match.
*/
find(propOrFunc, value){
if (typeof propOrFunc === 'string'){
if (typeof value === 'undefined') return null;
for (const item of this.values()){
if (item[propOrFunc] === value) return item;
}
return null;
}
if (typeof propOrFunc === 'function'){
for (const [key, val] of this){
if (propOrFunc(val, key, this)) return val;
}
return null;
}
return null;
}
/**
* Filters cache by function.
* @param func - Function to test.
* @return Cache containing matches.
*/
filter(func, thisArg){
if (thisArg) func = func.bind(thisArg);
const results = new Cache();
for (const [key, val] of this) {
if (func(val, key, this)) results.set(key, val);
}
return results;
}
/**
* Maps cache by function.
* @param func - Function to use.
* @return Array containing results.
*/
map(func, thisArg){
Iif (thisArg) func = func.bind(thisArg);
const array = new Array(this.size);
let i = 0;
for (const [key, val] of this) array[i++] = func(val, key, this);
return array;
}
}
/** A Twitch channel. */
class Channel {
/**
* Creates a new Channel.
* @param name - Name of channel.
* @param emotes - Caches of emotes.
*/
constructor(name, emotes = new Cache()){
/** Name of the Twitch channel. */
this.name = name;
/** Emotes belonging to this channel. */
this.emotes = emotes;
}
/** Same as name property. */
toString(){
return this.name;
}
}
/** An emote. */
class Emote {
/**
* Creates a new Emote.
* @param id - ID of emote.
* @param name - Name of emote.
* @param channel - Channel this emote belongs to.
* @param set - Set this emote belongs to.
* @param description - Description of emote.
* @param bttv - If this emote is BTTV.
* @param gif - If this emote is a GIF.
*/
constructor(id, name, channel, set, description, bttv = false, gif = false){
/** ID of the emote. */
this.id = id;
/** Name of the emote. */
this.name = name;
/** Channel this emote belongs to. Null for non-global BTTV emotes. */
this.channel = channel;
/** Set ID of the emote. For BTTV emotes, this would be the original channel's name. */
this.set = set;
/** Description of the emote. Only available for Twitch global emotes. */
this.description = description;
/** If this is a BTTV emote. */
this.bttv = bttv;
/** If this emote is a GIF. */
this.gif = gif;
}
/**
* Gets the image link for this emote.
* @param size - Image size, 0 to 2, default 0.
* @return Link to emote image.
*/
toLink(size = 0){
if (this.bttv) return (BTTV_TEMPLATE[size] || BTTV_TEMPLATE[0]).replace('{imageID}', this.id);
return (LINK_TEMPLATE[size] || LINK_TEMPLATE[0]).replace('{imageID}', this.id);
}
/** Same as name property. */
toString(){
return this.name;
}
}
/** Cached channels. */
let channels = new Cache();
/** Cached emotes. */
let emotes = new Cache();
/** Cached BTTV emotes. */
let bttv = new Cache();
/**
* Gets all emotes from Twitch Emotes.
* @return All emotes data.
*/
function getEmoteList(){
return new Promise((resolve, reject) => {
request(TWITCH_EMOTES).end((err, res) => {
Iif (err) return reject(err);
resolve(res.body.images);
});
});
}
/**
* Gets emotes from BTTV.
* @param channelName - Name of channel.
* @return BTTV channel data.
*/
function getBTTVEmoteList(channelName){
return new Promise((resolve, reject) => {
let name = channelName ? BTTV_CHANNELS.replace('{channelName}', channelName) : BTTV_EMOTES;
request(name).end((err, res) => {
if (err) return reject(err);
if (!res.body.emotes) return reject('Channel "' + channelName + '" not found.');
resolve(res.body.emotes);
});
});
}
/**
* Adds a channel and its emotes.
* @param channel - Channel object.
* @param bttv - If this channel is BTTV.
*/
function addChannel(channel, bttv){
channels.set(channel.name, channel);
// Only adds if it's not BTTV non-global emotes, because BTTV emotes can be in more than one channel.
Eif (!bttv) channel.emotes.forEach(e => emotes.set(e.name, e));
}
/**
* Parses and caches data.
* @param data - Data of emotes.
* @param channelName - Name of channel to cache.
* @return Channel cached.
*/
function cacheChannelData(data, channelName){
// Defaults to global Twitch.
let channel = channels.get(channelName || TWITCH_GLOBAL) || new Channel(channelName || TWITCH_GLOBAL);
_.forEach(data, (val, key) => {
let emote = new Emote(key, val.code, channel, val.set, val.description ? val.description : null);
channel.emotes.set(emote.name, emote);
});
addChannel(channel);
return channel;
}
/**
* Loads a channel and its emotes.
* @param channelName - Name of channel, keep as null for global emotes.
* @return Promise containing channel.
*/
function loadChannel(channelName){
return new Promise((resolve, reject) => {
// Lowercase channel names.
let name = channelName ? channelName.toLowerCase() : null;
getEmoteList().then(emoteRes => {
let channelEmotes = _.pickBy(emoteRes, (val, key) => val.channel === name);
if (_.size(channelEmotes) === 0) return reject('Channel "' + name + '" not found.');
let channel = cacheChannelData(channelEmotes, name);
resolve(channel);
}).catch(reject);
});
}
/**
* Loads multiple channels and their emotes.
* @param channelNames - Array of channel names.
* @return Promise containing Array of channels.
*/
function loadChannels(channelNames){
return new Promise((resolve, reject) => {
if (channelNames.length === 0) return reject('Channel names must be defined.');
let names = new Set(channelNames);
getEmoteList().then(emoteRes => {
let finishedChannels = [];
names.forEach(channelName => {
// Lowercase channel names.
let name = channelName ? channelName.toLowerCase() : null;
let channelEmotes = _.pickBy(emoteRes, (val, key) => val.channel === name);
if (_.size(channelEmotes) === 0) return reject('Channel "' + name + '" not found.');
let channel = cacheChannelData(channelEmotes, name);
finishedChannels.push(channel);
});
resolve(finishedChannels);
}).catch(reject);
});
}
/**
* Loads all Twitch channels. Takes a long time.
* @return Promise containing Array of channels.
*/
function loadAllChannels(){
return new Promise((resolve, reject) => {
getEmoteList().then(emoteRes => {
let emotesByChannel = _.groupBy(emoteRes, obj => obj.channel);
let channelNames = [];
_.forEach(_.sampleSize(emotesByChannel, 3), (val, key) => {
channelNames.push(val[0].channel);
});
let finishedChannels = [];
channelNames.forEach(channelName => {
let channelEmotes = _.pickBy(emoteRes, (val, key) => val.channel === channelName);
Iif (_.size(channelEmotes) === 0) return reject('Channel "' + channelName + '" not found.');
let channel = cacheChannelData(channelEmotes, channelName);
finishedChannels.push(channel);
});
resolve(finishedChannels);
}).catch(reject);
});
}
/**
* Loads a Twitch channel's BTTV emotes.
* @param channelName - Name of channel, keep as null for global emotes.
* @return Promise containing channel.
*/
function loadBTTVChannel(channelName){
return new Promise((resolve, reject) => {
// Lowercase channel names.
let name = channelName ? channelName.toLowerCase() : null;
getBTTVEmoteList(name).then(emoteRes => {
// Defaults to global BTTV.
let channel = channels.get(name || BTTV_GLOBAL) || new Channel(name || BTTV_GLOBAL);
if (channel.name === BTTV_GLOBAL){
emoteRes.forEach(emote => {
let e = new Emote(emote.id, emote.code, BTTV_GLOBAL, emote.channel, null, true, emote.imageType === 'gif');
channel.emotes.set(emote.code, e);
});
addChannel(channel);
return resolve(channel);
}
emoteRes.forEach(emote => {
let e = new Emote(emote.id, emote.code, null, emote.channel, null, true, emote.imageType === 'gif');
channel.emotes.set(emote.code, e);
bttv.set(emote.code, e);
});
addChannel(channel, true);
resolve(channel);
}).catch(reject);
});
}
/**
* Loads multiple BTTV channels and their emotes.
* @param channelNames - Array of channel names.
* @return Promise containing Array of channels.
*/
function loadBTTVChannels(channelNames){
return new Promise((resolve, reject) => {
if (channelNames.length === 0) return reject('Channel names must be defined.');
let names = new Set(channelNames);
let promises = [];
names.forEach(channelName => {
promises.push(loadBTTVChannel(channelName));
});
Promise.all(promises).then(resolve).catch(reject);
});
}
/**
* Loads the channel that the emote belongs to, Twitch and global BTTV only.
* @param emoteName - Name of emote.
* @return Promise containing emote.
*/
function loadByEmote(emoteName){
return new Promise((resolve, reject) => {
if (!emoteName) return reject('Emote name must be defined.');
getEmoteList().then(emoteRes => {
let emote = _.find(emoteRes, obj => obj.code === emoteName);
if (_.size(emote) === 0){
// Can't search through all BTTV channels, so only global BTTV.
return getBTTVEmoteList().then(bttvRes => {
let emote = bttvRes.find(e => e.code === emoteName);
if (!emote) reject('Emote ' + emoteName + ' not found.');
loadBTTVChannel().then(c => resolve(c.emotes.get(emoteName))).catch(reject);
}).catch(reject);
}
let channelEmotes = _.pickBy(emoteRes, (val, key) => val.channel === emote.channel);
let channelName = channelEmotes[Object.keys(channelEmotes)[0]].channel;
// Defaults to global Twitch.
let channel = cacheChannelData(channelEmotes, channelName);
if (channel.name === TWITCH_GLOBAL) resolve(channel.emotes.get(emoteName));
// Also load BTTV emotes for this channel as well.
loadBTTVChannel(channel.name).then(() => resolve(channel.emotes.get(emoteName))).catch(reject);
}).catch(reject);
});
}
/**
* Get Twitch channel by name.
* @param name - Name of channel.
* @return Promise containing channel.
*/
function channel(channelName){
return new Promise((resolve, reject) => {
// Lowercase channel names.
let name = channelName ? channelName.toLowerCase() : TWITCH_GLOBAL;
// Defaults to global Twitch.
let channelObj = channels.get(name || TWITCH_GLOBAL);
if (channelObj) return resolve(channelObj);
if (name === TWITCH_GLOBAL){
return loadChannel().then(resolve).catch(reject);
}
if (name === BTTV_GLOBAL){
return loadBTTVChannel().then(resolve).catch(reject);
}
// Load both.
let twitch = loadChannel(name);
let bttv = loadBTTVChannel(name);
// Ignore Promise rejects.
Promise.all([twitch, bttv].map(p => p.catch(e => e))).then(() => {
getChannel(name) ? resolve(getChannel(name)) : reject('Channel "' + name + '" not found.');
}).catch(reject);
});
}
/**
* Get Twitch channel by name, as long as it is in the cache.
* @param name - Name of channel.
* @return Channel object.
*/
function getChannel(channelName){
// Lowercase channel names.
let name = channelName ? channelName.toLowerCase() : TWITCH_GLOBAL;
// Defaults to global Twitch.
let channelObj = channels.get(name || TWITCH_GLOBAL);
return channelObj;
}
/**
* Get emote by name.
* @param emoteName - Name of emote.
* @param Promise containing emote.
*/
function emote(emoteName){
return new Promise((resolve, reject) => {
if (!emoteName) return reject('Emote name must be defined.');
let emoteObj = emotes.get(emoteName);
let bttvObj = bttv.get(emoteName);
if (emoteObj || bttvObj) return resolve(emoteObj || bttvObj);
// If this a channel:emote name.
if (/:/.test(emoteName)){
let cName = emoteName.split(':')[0];
let eName = emoteName.split(':')[1];
if (!eName) return reject('Emote name must be defined.');
let emoteObj = emotes.get(eName);
let bttvObj = bttv.get(eName);
if (emoteObj || bttvObj) return resolve(emoteObj || bttvObj);
if (cName === TWITCH_GLOBAL || cName === BTTV_GLOBAL){
return loadByEmote(eName).then(resolve).catch(reject);
}
return channel(cName).then(() => resolve(getEmote(eName))).catch(reject);
}
loadByEmote(emoteName).then(resolve).catch(reject);
});
}
/**
* Get emote by name, as long as it is in the cache.
* @param emoteName - Name of emote.
* @param Emote object.
*/
function getEmote(emoteName){
if (!emoteName) return null;
let emoteObj = emotes.get(emoteName);
let bttvObj = bttv.get(emoteName);
if (emoteObj || bttvObj) return (emoteObj || bttvObj);
// If this a channel:emote name.
if (/:/.test(emoteName)){
let eName = emoteName.split(':')[1];
if (!eName) return null;
let emoteObj = emotes.get(eName);
let bttvObj = bttv.get(eName);
return (emoteObj || bttvObj);
}
}
/**
* Parses text into one with the emotes formatted in. Emotes are only parsed if they are cached.
* @param text - Text to parse.
* @param type - One of: 'html', 'markdown', 'bbcode', or 'plain'.
* @param size - Image size, 0 to 2, default 0.
* @param start - Opening character.
* @param end - Closing character.
* @param custom - A custom format.
* @return The formatted string.
*/
function parse(text, type = 'html', size = 0, start = '', end = start, custom = ''){
if (!text) return null;
if (!/html|markdown|bbcode|plain/i.test(type)) type = 'html';
if (size < 0 || size > 2) size = 0;
let s = start;
let e = end;
if (s && !/^[a-zA-Z]/.test(s)) s = '\\' + s;
if (e && !/^[a-zA-Z]/.test(e)) e = '\\' + e;
// Regex that splits the string into words, symbols, spaces, and emote pattern e.g. :Kappa:
let reg = new RegExp('(' + s + '[\\w\\d\\(\\)]+' + e + ')|' + PUNCTUATIONS, 'g');
let words = text.match(reg);
let emotes = [];
// Regex to test if this is an emote pattern.
let emoteReg = new RegExp('(' + s + '[\\w\\d\\(\\)]+' + e + ')', 'g');
// Regex to replace the limiters.
let limitReg = new RegExp('^' + s + '|' + e + '$', 'g');
words.forEach(w => {
if (emoteReg.test(w)){
let emote = getEmote(w.replace(limitReg, ''));
return emotes.push(emote);
}
emotes.push('');
});
let template = custom || FORMAT_TEMPLATE[type.toUpperCase()];
return words.map((w, i) => emotes[i] instanceof Emote ? template.replace(/{size}/g, size).replace(/{name}/g, emotes[i].name).replace(/{link}/g, emotes[i].toLink(size)) : w).join('');
}
/**
* Parses text into one with the emotes formatted in. This can take a long time, as all words are checked.
* @param text - Text to parse.
* @param type - One of: 'html', 'markdown', 'bbcode', or 'plain'.
* @param size - Image size, 0 to 2, default 0.
* @param start - Opening character.
* @param end - Closing character.
* @param custom - A custom format.
* @return Promise containing formatted string.
*/
function parseAll(text, type = 'html', size = 0, start = '', end = start, custom = ''){
return new Promise((resolve, reject) => {
if (!text) return reject('text must be defined');
if (!/html|markdown|bbcode|plain/i.test(type)) type = 'html';
if (size < 0 || size > 2) size = 0;
let s = start;
let e = end;
if (s && !/^[a-zA-Z]/.test(s)) s = '\\' + s;
if (e && !/^[a-zA-Z]/.test(e)) e = '\\' + e;
// Regex that splits the string into words, symbols, spaces, and emote pattern e.g. :Kappa:
let reg = new RegExp('(' + s + '[\\w\\d\\(\\)]+' + e + ')|' + PUNCTUATIONS, 'g');
let words = text.match(reg);
let emotes = [];
// Regex to test if this is an emote pattern.
let emoteReg = new RegExp('(' + s + '[\\w\\d\\(\\)]+' + e + ')', 'g');
// Regex to replace the limiters.
let limitReg = new RegExp('^' + s + '|' + e + '$', 'g');
words.forEach(w => {
if (emoteReg.test(w)){
let emotePromise = emote(w.replace(limitReg, ''));
return promises.push(emotePromise);
}
promises.push(Promise.resolve(''));
});
Promise.all(promises.map(p => p.catch(e => e))).then(emotes => {
let template = custom || FORMAT_TEMPLATE[type.toUpperCase()];
resolve(words.map((w, i) => emotes[i] instanceof Emote ? template.replace(/{size}/g, size).replace(/{name}/g, emotes[i].name).replace(/{link}/g, emotes[i].toLink(size)) : w).join(''));
}).catch(reject);
});
}
/** Clears the caches. */
function clearCache(){
channels.clear();
emotes.clear();
bttv.clear();
}
/**
* Gets a copy of the caches.
* @return Object with Caches.
*/
function cache(){
return {
channels: new Cache(channels),
emotes: new Cache(emotes),
bttvEmotes: new Cache(bttv)
};
}
module.exports = {
Channel, channel, getChannel,
Emote, emote, getEmote,
TWITCH_GLOBAL, loadChannel, loadChannels,
BTTV_GLOBAL, loadBTTVChannel, loadBTTVChannels,
loadAllChannels,
Cache, cache, clearCache,
parse, parseAll
}; |