Add reference counting for emote sets so that we know when to unload them. Create a class for Users so that we can use ref counting with them.

src/modules/chat/emotes.js

@@ -65,6 +65,8 @@ export default class Emotes extends Module {
 		this.global_sets = new SourcedSet;
 
 		this.emote_sets = {};
+		this._set_refs = {};
+		this._set_timers = {};
 	}
 
 	onEnable() {
@@ -121,7 +123,44 @@ export default class Emotes extends Module {
 	}
 
 	// ========================================================================
-	// FFZ Emote Sets
+	// Emote Set Ref Counting
+	// ========================================================================
+
+	addDefaultSet(provider, set_id, data) {
+		if ( ! this.default_sets.sourceIncludes(provider, set_id) ) {
+			this.default_sets.push(provider, set_id);
+			this.refSet(set_id);
+		}
+
+		if ( data )
+			this.loadSetData(set_id, data);
+	}
+
+	removeDefaultSet(provider, set_id) {
+		if ( this.default_sets.sourceIncludes(provider, set_id) ) {
+			this.default_sets.remove(provider, set_id);
+			this.unrefSet(set_id);
+		}
+	}
+
+	refSet(set_id) {
+		this._set_refs[set_id] = (this._set_refs[set_id] || 0) + 1;
+		if ( this._set_timers[set_id] ) {
+			clearTimeout(this._set_timers[set_id]);
+			this._set_timers[set_id] = null;
+		}
+
+	}
+
+	unrefSet(set_id) {
+		const c = this._set_refs[set_id] = (this._set_refs[set_id] || 1) - 1;
+		if ( c <= 0 && ! this._set_timers[set_id] )
+			this._set_timers[set_id] = setTimeout(() => this.unloadSet(set_id), 5000);
+	}
+
+
+	// ========================================================================
+	// Emote Set Loading
 	// ========================================================================
 
 	async loadGlobalSets(tries = 0) {
@@ -149,13 +188,12 @@ export default class Emotes extends Module {
 
 		const sets = data.sets || {};
 
-		this.default_sets.extend('ffz-global', ...data.default_sets);
+		for(const set_id of data.default_sets)
+			this.addDefaultSet('ffz-global', set_id);
 
 		for(const set_id in sets)
-			if ( has(sets, set_id) ) {
-				this.global_sets.push('ffz-global', set_id);
+			if ( has(sets, set_id) )
 				this.loadSetData(set_id, sets[set_id]);
-			}
 
 		if ( data.users )
 			this.loadSetUsers(data.users);
@@ -168,12 +206,9 @@ export default class Emotes extends Module {
 				const emote_set = this.emote_sets[set_id],
 					users = data[set_id];
 
-				for(const login of users) {
-					const user = this.parent.getUser(undefined, login),
-						sets = user.emote_sets;
-
-					sets.push('ffz-global', set_id);
-				}
+				for(const login of users)
+					this.parent.getUser(undefined, login)
+						.addSet('ffz-global', set_id);
 
 				this.log.info(`Added "${emote_set ? emote_set.title : set_id}" emote set to ${users.length} users.`);
 			}
@@ -191,8 +226,6 @@ export default class Emotes extends Module {
 
 		this.emote_sets[set_id] = data;
 
-		data.users = old_set ? old_set.users : 0;
-
 		let count = 0;
 		const ems = data.emotes || data.emoticons,
 			new_ems = data.emotes = {},
@@ -237,11 +270,30 @@ export default class Emotes extends Module {
 		else if ( css.length )
 			data.pending_css = css.join('');
 
-		this.log.info(`Updated emotes for set #${set_id}: ${data.title}`);
+		this.log.info(`Loaded emote set #${set_id}: ${data.title} (${count} emotes)`);
 		this.emit(':loaded', set_id, data);
 	}
 
 
+	unloadSet(set_id, force = false) {
+		const old_set = this.emote_sets[set_id],
+			count = this._set_refs[set_id] || 0;
+
+		if ( ! old_set )
+			return;
+
+		if ( count > 0 ) {
+			if ( ! force )
+				return this.log.warn(`Attempted to unload emote set #${set_id} with ${count} users.`);
+			this.log.warn(`Unloading emote set ${set_id} with ${count} users.`);
+		}
+
+		this.log.info(`Unloaded emote set #${set_id}: ${old_set.title}`);
+		this.emit(':unloaded', set_id, old_set);
+		this.emote_sets[set_id] = null;
+	}
+
+
 	// ========================================================================
 	// Emote CSS
 	// ========================================================================

src/modules/chat/index.js

@@ -9,12 +9,13 @@ const WEBKIT = IS_WEBKIT ? '-webkit-' : '';
 
 import Module from 'utilities/module';
 import {createElement, ManagedStyle} from 'utilities/dom';
-import {timeout, has, SourcedSet} from 'utilities/object';
+import {timeout, has} from 'utilities/object';
 
 import Badges from './badges';
 import Emotes from './emotes';
 
 import Room from './room';
+import User from './user';
 import * as TOKENIZERS from './tokenizers';
 
 
@@ -308,6 +309,8 @@ export default class Chat extends Module {
 
 	getUser(id, login, no_create, no_login) {
 		let user;
+		if ( id && typeof id === 'number' )
+			id = `${id}`;
 
 		if ( this.user_ids[id] )
 			user = this.user_ids[id];
@@ -319,7 +322,7 @@ export default class Chat extends Module {
 			return null;
 
 		else
-			user = {id, login, badges: [], emote_sets: new SourcedSet};
+			user = new User(this, null, id, login);
 
 		if ( id && id !== user.id ) {
 			// If the ID isn't what we expected, something is very wrong here.
@@ -328,7 +331,7 @@ export default class Chat extends Module {
 				throw new Error('id mismatch');
 
 			// Otherwise, we're just here to set the ID.
-			user.id = id;
+			user._id = id;
 			this.user_ids[id] = user;
 		}
 
@@ -354,6 +357,8 @@ export default class Chat extends Module {
 
 	getRoom(id, login, no_create, no_login) {
 		let room;
+		if ( id && typeof id === 'number' )
+			id = `${id}`;
 
 		if ( this.room_ids[id] )
 			room = this.room_ids[id];
@@ -374,7 +379,7 @@ export default class Chat extends Module {
 				throw new Error('id mismatch');
 
 			// Otherwise, we're just here to set the ID.
-			room.id = id;
+			room._id = id;
 			this.room_ids[id] = room;
 		}
 

src/modules/chat/room.js

@@ -4,19 +4,18 @@
 // Room
 // ============================================================================
 
+import User from './user';
+
 import {API_SERVER, IS_WEBKIT} from 'utilities/constants';
 
-import {EventEmitter} from 'utilities/events';
 import {ManagedStyle} from 'utilities/dom';
 import {has, SourcedSet} from 'utilities/object';
 
 const WEBKIT = IS_WEBKIT ? '-webkit-' : '';
 
 
-export default class Room extends EventEmitter {
+export default class Room {
 	constructor(manager, id, login) {
-		super();
-
 		this._destroy_timer = null;
 
 		this.manager = manager;
@@ -30,8 +29,8 @@ export default class Room extends EventEmitter {
 		this.style = new ManagedStyle(`room--${login}`);
 
 		this.emote_sets = new SourcedSet;
-		this.users = [];
-		this.user_ids = [];
+		this.users = {};
+		this.user_ids = {};
 
 		this.manager.emit(':room-add', this);
 		this.load_data();
@@ -48,6 +47,22 @@ export default class Room extends EventEmitter {
 
 		this.style.destroy();
 
+		for(const user of Object.values(this.user_ids)) {
+			if ( user )
+				user.destroy();
+		}
+
+		for(const user of Object.values(this.users)) {
+			if ( user )
+				user.destroy();
+		}
+
+		for(const set_id of this.emote_sets._cache)
+			this.manager.emotes.unrefSet(set_id);
+
+		this.emote_sets = null;
+		this.style = null;
+
 		if ( this._login ) {
 			if ( this.manager.rooms[this._login] === this )
 				this.manager.rooms[this._login] = null;
@@ -74,11 +89,10 @@ export default class Room extends EventEmitter {
 
 		if ( this._login ) {
 			const old_room = this.manager.rooms[this._login];
-			if ( old_room !== this )
-				old_room.login = null;
-
-			this.manager.rooms[this._login] = null;
-			this.manager.socket.unsubscribe(`room.${this.login}`);
+			if ( old_room === this ) {
+				this.manager.rooms[this._login] = null;
+				this.manager.socket.unsubscribe(`room.${this.login}`);
+			}
 		}
 
 		this._login = val;
@@ -95,6 +109,54 @@ export default class Room extends EventEmitter {
 	}
 
 
+	getUser(id, login, no_create, no_login) {
+		let user;
+		if ( id && typeof id === 'number' )
+			id = `${id}`;
+
+		if ( this.user_ids[id] )
+			user = this.user_ids[id];
+
+		else if ( this.users[login] && ! no_login )
+			user = this.users[login];
+
+		else if ( no_create )
+			return null;
+
+		else
+			user = new User(this.manager, this, id, login);
+
+		if ( id && id !== user.id ) {
+			// If the ID isn't what we expected, something is very wrong here.
+			// Blame name changes.
+			if ( user.id )
+				throw new Error('id mismatch');
+
+			// Otherwise, we're just here to set the ID.
+			user._id = id;
+			this.user_ids[id] = user;
+		}
+
+		if ( login ) {
+			const other = this.users[login];
+			if ( other ) {
+				if ( other !== this && ! no_login ) {
+					// If the other has an ID, something weird happened. Screw it
+					// and just take over.
+					if ( other.id )
+						this.users[login] = user;
+					else {
+						// TODO: Merge Logic~~
+					}
+				}
+			} else
+				this.users[login] = user;
+		}
+
+		return user;
+	}
+
+
 	// ========================================================================
 	// FFZ Data
 	// ========================================================================
@@ -163,6 +225,27 @@ export default class Room extends EventEmitter {
 	}
 
 
+	// ========================================================================
+	// Emote Sets
+	// ========================================================================
+
+	addSet(provider, set_id, data) {
+		if ( ! this.emote_sets.sourceIncludes(provider, set_id) ) {
+			this.emote_sets.push(provider, set_id);
+			this.manager.emotes.refSet(set_id);
+		}
+
+		if ( data )
+			this.manager.emotes.loadSetData(set_id, data);
+	}
+
+	removeSet(provider, set_id) {
+		if ( this.emote_sets.sourceIncludes(provider, set_id) ) {
+			this.emote_sets.remove(provider, set_id);
+			this.manager.emotes.unrefSet(set_id);
+		}
+	}
+
 
 	// ========================================================================
 	// Life Cycle

src/modules/chat/user.js

@@ -0,0 +1,82 @@
+'use strict';
+
+// ============================================================================
+// User
+// ============================================================================
+
+import {SourcedSet} from 'utilities/object';
+
+export default class User {
+	constructor(manager, room, id, login) {
+		this.manager = manager;
+		this.room = room;
+
+		this._id = id;
+		this.login = login;
+
+		if ( id )
+			(room || manager).user_ids[id] = this;
+
+		this.emote_sets = new SourcedSet;
+	}
+
+	destroy() {
+		this.destroyed = true;
+
+		for(const set_id of this.emote_sets._cache)
+			this.manager.emotes.unrefSet(set_id);
+	}
+
+	get id() {
+		return this._id;
+	}
+
+	get login() {
+		return this._login;
+	}
+
+	set login(val) {
+		if ( this._login === val )
+			return;
+
+		const obj = this.room || this.manager;
+
+		if ( this._login ) {
+			const old_user = obj.users[this._login];
+			if ( old_user === this )
+				obj.users[this._login] = null;
+		}
+
+		this._login = val;
+		if ( ! val )
+			return;
+
+		const old_user = obj.users[val];
+		if ( old_user && old_user !== this )
+			old_user.login = null;
+
+		obj.users[val] = this;
+	}
+
+
+	// ========================================================================
+	// Emote Sets
+	// ========================================================================
+
+	addSet(provider, set_id, data) {
+		if ( ! this.emote_sets.sourceIncludes(provider, set_id) ) {
+			this.emote_sets.push(provider, set_id);
+			this.manager.emotes.refSet(set_id);
+		}
+
+		if ( data )
+			this.manager.emotes.loadSetData(set_id, data);
+	}
+
+	removeSet(provider, set_id) {
+		if ( this.emote_sets.sourceIncludes(provider, set_id) ) {
+			this.emote_sets.remove(provider, set_id);
+			this.manager.emotes.unrefSet(set_id);
+		}
+	}
+}

src/utilities/object.js

@@ -186,6 +186,11 @@ export class SourcedSet {
 	get(key) { return this._sources && this._sources.get(key) }
 	has(key) { return this._sources ? this._sources.has(key) : false }
 
+	sourceIncludes(key, val) {
+		const src = this._sources && this._sources.get(key);
+		return src && src.includes(val);
+	}
+
 	includes(val) {
 		return this._cache.includes(val);
 	}