/
ReactionCollector.js
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/
ReactionCollector.js
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'use strict';
const { Collection } = require('@discordjs/collection');
const Collector = require('./interfaces/Collector');
const { Events } = require('../util/Constants');
/**
* @typedef {CollectorOptions} ReactionCollectorOptions
* @property {number} max The maximum total amount of reactions to collect
* @property {number} maxEmojis The maximum number of emojis to collect
* @property {number} maxUsers The maximum number of users to react
*/
/**
* Collects reactions on messages.
* Will automatically stop if the message ({@link Client#event:messageDelete messageDelete} or
* {@link Client#event:messageDeleteBulk messageDeleteBulk}),
* channel ({@link Client#event:channelDelete channelDelete}),
* thread ({@link Client#event:threadDelete threadDelete}), or
* guild ({@link Client#event:guildDelete guildDelete}) is deleted.
* @extends {Collector}
*/
class ReactionCollector extends Collector {
/**
* @param {Message} message The message upon which to collect reactions
* @param {ReactionCollectorOptions} [options={}] The options to apply to this collector
*/
constructor(message, options = {}) {
super(message.client, options);
/**
* The message upon which to collect reactions
* @type {Message}
*/
this.message = message;
/**
* The users that have reacted to this message
* @type {Collection}
*/
this.users = new Collection();
/**
* The total number of reactions collected
* @type {number}
*/
this.total = 0;
this.empty = this.empty.bind(this);
this._handleChannelDeletion = this._handleChannelDeletion.bind(this);
this._handleThreadDeletion = this._handleThreadDeletion.bind(this);
this._handleGuildDeletion = this._handleGuildDeletion.bind(this);
this._handleMessageDeletion = this._handleMessageDeletion.bind(this);
const bulkDeleteListener = messages => {
if (messages.has(this.message.id)) this.stop('messageDelete');
};
this.client.incrementMaxListeners();
this.client.on(Events.MESSAGE_REACTION_ADD, this.handleCollect);
this.client.on(Events.MESSAGE_REACTION_REMOVE, this.handleDispose);
this.client.on(Events.MESSAGE_REACTION_REMOVE_ALL, this.empty);
this.client.on(Events.MESSAGE_DELETE, this._handleMessageDeletion);
this.client.on(Events.MESSAGE_BULK_DELETE, bulkDeleteListener);
this.client.on(Events.CHANNEL_DELETE, this._handleChannelDeletion);
this.client.on(Events.THREAD_DELETE, this._handleThreadDeletion);
this.client.on(Events.GUILD_DELETE, this._handleGuildDeletion);
this.once('end', () => {
this.client.removeListener(Events.MESSAGE_REACTION_ADD, this.handleCollect);
this.client.removeListener(Events.MESSAGE_REACTION_REMOVE, this.handleDispose);
this.client.removeListener(Events.MESSAGE_REACTION_REMOVE_ALL, this.empty);
this.client.removeListener(Events.MESSAGE_DELETE, this._handleMessageDeletion);
this.client.removeListener(Events.MESSAGE_BULK_DELETE, bulkDeleteListener);
this.client.removeListener(Events.CHANNEL_DELETE, this._handleChannelDeletion);
this.client.removeListener(Events.THREAD_DELETE, this._handleThreadDeletion);
this.client.removeListener(Events.GUILD_DELETE, this._handleGuildDeletion);
this.client.decrementMaxListeners();
});
this.on('collect', (reaction, user) => {
/**
* Emitted whenever a reaction is newly created on a message. Will emit only when a new reaction is
* added to the message, as opposed to {@link Collector#collect} which will
* be emitted even when a reaction has already been added to the message.
* @event ReactionCollector#create
* @param {MessageReaction} reaction The reaction that was added
* @param {User} user The user that added the reaction
*/
if (reaction.count === 1) {
this.emit('create', reaction, user);
}
this.total++;
this.users.set(user.id, user);
});
this.on('remove', (reaction, user) => {
this.total--;
if (!this.collected.some(r => r.users.cache.has(user.id))) this.users.delete(user.id);
});
}
/**
* Handles an incoming reaction for possible collection.
* @param {MessageReaction} reaction The reaction to possibly collect
* @param {User} user The user that added the reaction
* @returns {?(Snowflake|string)}
* @private
*/
collect(reaction) {
/**
* Emitted whenever a reaction is collected.
* @event ReactionCollector#collect
* @param {MessageReaction} reaction The reaction that was collected
* @param {User} user The user that added the reaction
*/
if (reaction.message.id !== this.message.id) return null;
return ReactionCollector.key(reaction);
}
/**
* Handles a reaction deletion for possible disposal.
* @param {MessageReaction} reaction The reaction to possibly dispose of
* @param {User} user The user that removed the reaction
* @returns {?(Snowflake|string)}
*/
dispose(reaction, user) {
/**
* Emitted when the reaction had all the users removed and the `dispose` option is set to true.
* @event ReactionCollector#dispose
* @param {MessageReaction} reaction The reaction that was disposed of
* @param {User} user The user that removed the reaction
*/
if (reaction.message.id !== this.message.id) return null;
/**
* Emitted when the reaction had one user removed and the `dispose` option is set to true.
* @event ReactionCollector#remove
* @param {MessageReaction} reaction The reaction that was removed
* @param {User} user The user that removed the reaction
*/
if (this.collected.has(ReactionCollector.key(reaction)) && this.users.has(user.id)) {
this.emit('remove', reaction, user);
}
return reaction.count ? null : ReactionCollector.key(reaction);
}
/**
* Empties this reaction collector.
*/
empty() {
this.total = 0;
this.collected.clear();
this.users.clear();
this.checkEnd();
}
/**
* The reason this collector has ended with, or null if it hasn't ended yet
* @type {?string}
* @readonly
*/
get endReason() {
if (this.options.max && this.total >= this.options.max) return 'limit';
if (this.options.maxEmojis && this.collected.size >= this.options.maxEmojis) return 'emojiLimit';
if (this.options.maxUsers && this.users.size >= this.options.maxUsers) return 'userLimit';
return null;
}
/**
* Handles checking if the message has been deleted, and if so, stops the collector with the reason 'messageDelete'.
* @private
* @param {Message} message The message that was deleted
* @returns {void}
*/
_handleMessageDeletion(message) {
if (message.id === this.message.id) {
this.stop('messageDelete');
}
}
/**
* Handles checking if the channel has been deleted, and if so, stops the collector with the reason 'channelDelete'.
* @private
* @param {GuildChannel} channel The channel that was deleted
* @returns {void}
*/
_handleChannelDeletion(channel) {
if (channel.id === this.message.channelId || channel.id === this.message.channel.parentId) {
this.stop('channelDelete');
}
}
/**
* Handles checking if the thread has been deleted, and if so, stops the collector with the reason 'threadDelete'.
* @private
* @param {ThreadChannel} thread The thread that was deleted
* @returns {void}
*/
_handleThreadDeletion(thread) {
if (thread.id === this.message.channelId) {
this.stop('threadDelete');
}
}
/**
* Handles checking if the guild has been deleted, and if so, stops the collector with the reason 'guildDelete'.
* @private
* @param {Guild} guild The guild that was deleted
* @returns {void}
*/
_handleGuildDeletion(guild) {
if (guild.id === this.message.guild?.id) {
this.stop('guildDelete');
}
}
/**
* Gets the collector key for a reaction.
* @param {MessageReaction} reaction The message reaction to get the key for
* @returns {Snowflake|string}
*/
static key(reaction) {
return reaction.emoji.id ?? reaction.emoji.name;
}
}
module.exports = ReactionCollector;