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// Copyright (c) 2016 Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
import AppDispatcher from '../dispatcher/app_dispatcher.jsx';
import Constants from 'utils/constants.jsx';
import EventEmitter from 'events';
import * as Emoji from 'utils/emoji.jsx';
const ActionTypes = Constants.ActionTypes;
const CHANGE_EVENT = 'changed';
// Wrap the contents of the store so that we don't need to construct an ES6 map where most of the content
// (the system emojis) will never change. It provides the get/has functions of a map and an iterator so
// that it can be used in for..of loops
class EmojiMap {
constructor(customEmojis) {
this.customEmojis = customEmojis;
// Store customEmojis to an array so we can iterate it more easily
this.customEmojisArray = [...customEmojis];
}
has(name) {
return Emoji.EmojiIndicesByAlias.has(name) || this.customEmojis.has(name);
}
get(name) {
if (Emoji.EmojiIndicesByAlias.has(name)) {
return Emoji.Emojis[Emoji.EmojiIndicesByAlias.get(name)];
}
return this.customEmojis.get(name);
}
[Symbol.iterator]() {
const customEmojisArray = this.customEmojisArray;
return {
systemIndex: 0,
customIndex: 0,
next() {
if (this.systemIndex < Emoji.Emojis.length) {
const emoji = Emoji.Emojis[this.systemIndex];
this.systemIndex += 1;
return {value: [emoji.aliases[0], emoji]};
}
if (this.customIndex < customEmojisArray.length) {
const emoji = customEmojisArray[this.customIndex][1];
this.customIndex += 1;
return {value: [emoji.name, emoji]};
}
return {done: true};
}
};
}
}
class EmojiStore extends EventEmitter {
constructor() {
super();
this.dispatchToken = AppDispatcher.register(this.handleEventPayload.bind(this));
this.setMaxListeners(600);
this.receivedCustomEmojis = false;
this.customEmojis = new Map();
this.map = new EmojiMap(this.customEmojis);
}
addChangeListener(callback) {
this.on(CHANGE_EVENT, callback);
}
removeChangeListener(callback) {
this.removeListener(CHANGE_EVENT, callback);
}
emitChange() {
this.emit(CHANGE_EVENT);
}
hasReceivedCustomEmojis() {
return this.receivedCustomEmojis;
}
setCustomEmojis(customEmojis) {
customEmojis.sort((a, b) => a.name.localeCompare(b.name));
this.customEmojis = new Map();
for (const emoji of customEmojis) {
this.addCustomEmoji(emoji);
}
this.map = new EmojiMap(this.customEmojis);
}
addCustomEmoji(emoji) {
this.customEmojis.set(emoji.name, emoji);
}
removeCustomEmoji(id) {
for (const [name, emoji] of this.customEmojis) {
if (emoji.id === id) {
this.customEmojis.delete(name);
break;
}
}
}
hasSystemEmoji(name) {
return Emoji.EmojiIndicesByAlias.has(name);
}
getCustomEmojiMap() {
return this.customEmojis;
}
getEmojis() {
return this.map;
}
has(name) {
return this.map.has(name);
}
get(name) {
return this.map.get(name);
}
hasUnicode(codepoint) {
return Emoji.EmojiIndicesByUnicode.has(codepoint);
}
getUnicode(codepoint) {
return Emoji.Emojis[Emoji.EmojiIndicesByUnicode.get(codepoint)];
}
getEmojiImageUrl(emoji) {
if (emoji.id) {
// must match Client.getCustomEmojiImageUrl
return `/api/v3/emoji/${emoji.id}`;
}
const filename = emoji.filename || emoji.aliases[0];
return Constants.EMOJI_PATH + '/' + filename + '.png';
}
handleEventPayload(payload) {
const action = payload.action;
switch (action.type) {
case ActionTypes.RECEIVED_CUSTOM_EMOJIS:
this.setCustomEmojis(action.emojis);
this.receivedCustomEmojis = true;
this.emitChange();
break;
case ActionTypes.RECEIVED_CUSTOM_EMOJI:
this.addCustomEmoji(action.emoji);
this.emitChange();
break;
case ActionTypes.REMOVED_CUSTOM_EMOJI:
this.removeCustomEmoji(action.id);
this.emitChange();
break;
}
}
}
export default new EmojiStore();
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