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MessageReaction.js
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MessageReaction.js
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'use strict';
const GuildEmoji = require('./GuildEmoji');
const ReactionEmoji = require('./ReactionEmoji');
const ReactionUserManager = require('../managers/ReactionUserManager');
const Util = require('../util/Util');
/**
* Represents a reaction to a message.
*/
class MessageReaction {
/**
* @param {Client} client The instantiating client
* @param {APIReaction} data The data for the message reaction
* @param {Message} message The message the reaction refers to
*/
constructor(client, data, message) {
/**
* The client that instantiated this message reaction
* @name MessageReaction#client
* @type {Client}
* @readonly
*/
Object.defineProperty(this, 'client', { value: client });
/**
* The message that this reaction refers to
* @type {Message}
*/
this.message = message;
/**
* Whether the client has given this reaction
* @type {boolean}
*/
this.me = data.me;
/**
* A manager of the users that have given this reaction
* @type {ReactionUserManager}
*/
this.users = new ReactionUserManager(this);
this._emoji = new ReactionEmoji(this, data.emoji);
this._patch(data);
}
_patch(data) {
// eslint-disable-next-line eqeqeq
if (this.count == undefined) {
/**
* The number of people that have given the same reaction
* @type {?number}
*/
this.count = data.count;
}
}
/**
* Removes all users from this reaction.
* @returns {Promise<MessageReaction>}
*/
async remove() {
await this.client.api
.channels(this.message.channelId)
.messages(this.message.id)
.reactions(this._emoji.identifier)
.delete();
return this;
}
/**
* The emoji of this reaction, either an GuildEmoji object for known custom emojis, or a ReactionEmoji
* object which has fewer properties. Whatever the prototype of the emoji, it will still have
* `name`, `id`, `identifier` and `toString()`
* @type {GuildEmoji|ReactionEmoji}
* @readonly
*/
get emoji() {
if (this._emoji instanceof GuildEmoji) return this._emoji;
// Check to see if the emoji has become known to the client
if (this._emoji.id) {
const emojis = this.message.client.emojis.cache;
if (emojis.has(this._emoji.id)) {
const emoji = emojis.get(this._emoji.id);
this._emoji = emoji;
return emoji;
}
}
return this._emoji;
}
/**
* Whether or not this reaction is a partial
* @type {boolean}
* @readonly
*/
get partial() {
return this.count === null;
}
/**
* Fetch this reaction.
* @returns {Promise<MessageReaction>}
*/
async fetch() {
const message = await this.message.fetch();
const existing = message.reactions.cache.get(this.emoji.id ?? this.emoji.name);
// The reaction won't get set when it has been completely removed
this._patch(existing ?? { count: 0 });
return this;
}
toJSON() {
return Util.flatten(this, { emoji: 'emojiId', message: 'messageId' });
}
_add(user) {
if (this.partial) return;
this.users.cache.set(user.id, user);
if (!this.me || user.id !== this.message.client.user.id || this.count === 0) this.count++;
if (!this.me) this.me = user.id === this.message.client.user.id;
}
_remove(user) {
if (this.partial) return;
this.users.cache.delete(user.id);
if (!this.me || user.id !== this.message.client.user.id) this.count--;
if (user.id === this.message.client.user.id) this.me = false;
if (this.count <= 0 && this.users.cache.size === 0) {
this.message.reactions.cache.delete(this.emoji.id ?? this.emoji.name);
}
}
}
module.exports = MessageReaction;
/**
* @external APIReaction
* @see {@link https://discord.com/developers/docs/resources/channel#reaction-object}
*/