fix(GuildEmojiManager): check for guild in methods that use it (#4886)

Author: vaporoxx

src/errors/Messages.js

@@ -103,6 +103,8 @@ const Messages = {
   FETCH_GROUP_DM_CHANNEL: "Bots don't have access to Group DM Channels and cannot fetch them",
 
   MEMBER_FETCH_NONCE_LENGTH: 'Nonce length must not exceed 32 characters.',
+
+  GUILDEMOJIMANAGER_NO_GUILD: 'Method cannot be called from a Client instance.',
 };
 
 for (const [name, message] of Object.entries(Messages)) register(name, message);

src/managers/GuildEmojiManager.js

@@ -1,7 +1,7 @@
 'use strict';
 
 const BaseManager = require('./BaseManager');
-const { TypeError } = require('../errors');
+const { Error, TypeError } = require('../errors');
 const GuildEmoji = require('../structures/GuildEmoji');
 const ReactionEmoji = require('../structures/ReactionEmoji');
 const Collection = require('../util/Collection');
@@ -16,9 +16,9 @@ class GuildEmojiManager extends BaseManager {
     super(guild.client, iterable, GuildEmoji);
     /**
      * The guild this manager belongs to
-     * @type {Guild}
+     * @type {?Guild}
      */
-    this.guild = guild;
+    this.guild = 'name' in guild ? guild : null;
   }
 
   /**
@@ -28,6 +28,7 @@ class GuildEmojiManager extends BaseManager {
    */
 
   add(data, cache) {
+    if (!this.guild) throw new Error('GUILDEMOJIMANAGER_NO_GUILD');
     return super.add(data, cache, { extras: [this.guild] });
   }
 
@@ -51,6 +52,7 @@ class GuildEmojiManager extends BaseManager {
    *   .catch(console.error);
    */
   async create(attachment, name, { roles, reason } = {}) {
+    if (!this.guild) throw new Error('GUILDEMOJIMANAGER_NO_GUILD');
     attachment = await DataResolver.resolveImage(attachment);
     if (!attachment) throw new TypeError('REQ_RESOURCE_TYPE');
 

typings/index.d.ts

@@ -1917,7 +1917,7 @@ declare module 'discord.js' {
 
   export class GuildEmojiManager extends BaseManager<Snowflake, GuildEmoji, EmojiResolvable> {
     constructor(guild: Guild, iterable?: Iterable<any>);
-    public guild: Guild;
+    public guild: Guild | null;
     public create(
       attachment: BufferResolvable | Base64Resolvable,
       name: string,