types(MessageManager): Allow comparison of messages again (#9612)

* types(MessageManager): allow comparison of messages again

* feat: match TypeScript

* docs: update wording

* chore: revert breaking change

---------

Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

packages/discord.js/src/index.js

@@ -55,6 +55,7 @@ exports.CachedManager = require('./managers/CachedManager');
 exports.ChannelManager = require('./managers/ChannelManager');
 exports.ClientVoiceManager = require('./client/voice/ClientVoiceManager');
 exports.DataManager = require('./managers/DataManager');
+exports.DMMessageManager = require('./managers/DMMessageManager');
 exports.GuildApplicationCommandManager = require('./managers/GuildApplicationCommandManager');
 exports.GuildBanManager = require('./managers/GuildBanManager');
 exports.GuildChannelManager = require('./managers/GuildChannelManager');
@@ -65,6 +66,7 @@ exports.GuildInviteManager = require('./managers/GuildInviteManager');
 exports.GuildManager = require('./managers/GuildManager');
 exports.GuildMemberManager = require('./managers/GuildMemberManager');
 exports.GuildMemberRoleManager = require('./managers/GuildMemberRoleManager');
+exports.GuildMessageManager = require('./managers/GuildMessageManager');
 exports.GuildScheduledEventManager = require('./managers/GuildScheduledEventManager');
 exports.GuildStickerManager = require('./managers/GuildStickerManager');
 exports.GuildTextThreadManager = require('./managers/GuildTextThreadManager');

packages/discord.js/src/managers/DMMessageManager.js

@@ -0,0 +1,17 @@
+'use strict';
+
+const MessageManager = require('./MessageManager');
+
+/**
+ * Manages API methods for messages in direct message channels and holds their cache.
+ * @extends {MessageManager}
+ */
+class DMMessageManager extends MessageManager {
+  /**
+   * The channel that the messages belong to
+   * @name DMMessageManager#channel
+   * @type {DMChannel}
+   */
+}
+
+module.exports = DMMessageManager;

packages/discord.js/src/managers/GuildMessageManager.js

@@ -0,0 +1,17 @@
+'use strict';
+
+const MessageManager = require('./MessageManager');
+
+/**
+ * Manages API methods for messages in a guild and holds their cache.
+ * @extends {MessageManager}
+ */
+class GuildMessageManager extends MessageManager {
+  /**
+   * The channel that the messages belong to
+   * @name GuildMessageManager#channel
+   * @type {GuildTextBasedChannel}
+   */
+}
+
+module.exports = GuildMessageManager;

packages/discord.js/src/managers/MessageManager.js

@@ -12,6 +12,7 @@ const { resolvePartialEmoji } = require('../util/Util');
 /**
  * Manages API methods for Messages and holds their cache.
  * @extends {CachedManager}
+ * @abstract
  */
 class MessageManager extends CachedManager {
   constructor(channel, iterable) {

packages/discord.js/src/structures/BaseGuildTextChannel.js

@@ -2,8 +2,8 @@
 
 const GuildChannel = require('./GuildChannel');
 const TextBasedChannel = require('./interfaces/TextBasedChannel');
+const GuildMessageManager = require('../managers/GuildMessageManager');
 const GuildTextThreadManager = require('../managers/GuildTextThreadManager');
-const MessageManager = require('../managers/MessageManager');
 
 /**
  * Represents a text-based guild channel on Discord.
@@ -16,9 +16,9 @@ class BaseGuildTextChannel extends GuildChannel {
 
     /**
      * A manager of the messages sent to this channel
-     * @type {MessageManager}
+     * @type {GuildMessageManager}
      */
-    this.messages = new MessageManager(this);
+    this.messages = new GuildMessageManager(this);
 
     /**
      * A manager of the threads belonging to this channel

packages/discord.js/src/structures/BaseGuildVoiceChannel.js

@@ -4,7 +4,7 @@ const { Collection } = require('@discordjs/collection');
 const { PermissionFlagsBits } = require('discord-api-types/v10');
 const GuildChannel = require('./GuildChannel');
 const TextBasedChannel = require('./interfaces/TextBasedChannel');
-const MessageManager = require('../managers/MessageManager');
+const GuildMessageManager = require('../managers/GuildMessageManager');
 
 /**
  * Represents a voice-based guild channel on Discord.
@@ -16,9 +16,9 @@ class BaseGuildVoiceChannel extends GuildChannel {
     super(guild, data, client, false);
     /**
      * A manager of the messages sent to this channel
-     * @type {MessageManager}
+     * @type {GuildMessageManager}
      */
-    this.messages = new MessageManager(this);
+    this.messages = new GuildMessageManager(this);
 
     /**
      * If the guild considers this channel NSFW

packages/discord.js/src/structures/DMChannel.js

@@ -4,7 +4,7 @@ const { userMention } = require('@discordjs/builders');
 const { ChannelType } = require('discord-api-types/v10');
 const { BaseChannel } = require('./BaseChannel');
 const TextBasedChannel = require('./interfaces/TextBasedChannel');
-const MessageManager = require('../managers/MessageManager');
+const DMMessageManager = require('../managers/DMMessageManager');
 const Partials = require('../util/Partials');
 
 /**
@@ -21,9 +21,9 @@ class DMChannel extends BaseChannel {
 
     /**
      * A manager of the messages belonging to this channel
-     * @type {MessageManager}
+     * @type {DMMessageManager}
      */
-    this.messages = new MessageManager(this);
+    this.messages = new DMMessageManager(this);
   }
 
   _patch(data) {

packages/discord.js/src/structures/ThreadChannel.js

@@ -4,7 +4,7 @@ const { ChannelType, PermissionFlagsBits, Routes, ChannelFlags } = require('disc
 const { BaseChannel } = require('./BaseChannel');
 const TextBasedChannel = require('./interfaces/TextBasedChannel');
 const { DiscordjsRangeError, ErrorCodes } = require('../errors');
-const MessageManager = require('../managers/MessageManager');
+const GuildMessageManager = require('../managers/GuildMessageManager');
 const ThreadMemberManager = require('../managers/ThreadMemberManager');
 const ChannelFlagsBitField = require('../util/ChannelFlagsBitField');
 
@@ -31,9 +31,9 @@ class ThreadChannel extends BaseChannel {
 
     /**
      * A manager of the messages sent to this thread
-     * @type {MessageManager}
+     * @type {GuildMessageManager}
      */
-    this.messages = new MessageManager(this);
+    this.messages = new GuildMessageManager(this);
 
     /**
      * A manager of the members that are part of this thread

packages/discord.js/src/structures/interfaces/TextBasedChannel.js

@@ -17,9 +17,9 @@ class TextBasedChannel {
   constructor() {
     /**
      * A manager of the messages sent to this channel
-     * @type {MessageManager}
+     * @type {GuildMessageManager}
      */
-    this.messages = new MessageManager(this);
+    this.messages = new GuildMessageManager(this);
 
     /**
      * The channel's last message id, if one was sent
@@ -410,4 +410,4 @@ module.exports = TextBasedChannel;
 
 // Fixes Circular
 // eslint-disable-next-line import/order
-const MessageManager = require('../../managers/MessageManager');
+const GuildMessageManager = require('../../managers/GuildMessageManager');

packages/discord.js/typings/index.d.ts

@@ -4005,14 +4005,13 @@ export class GuildMemberRoleManager extends DataManager<Snowflake, Role, RoleRes
   ): Promise<GuildMember>;
 }
 
-export class MessageManager<InGuild extends boolean = boolean> extends CachedManager<
+export abstract class MessageManager<InGuild extends boolean = boolean> extends CachedManager<
   Snowflake,
   Message<InGuild>,
   MessageResolvable
 > {
-  private constructor(channel: TextBasedChannel, iterable?: Iterable<RawMessageData>);
-  public channel: If<InGuild, GuildTextBasedChannel, TextBasedChannel>;
-  public crosspost(message: MessageResolvable): Promise<Message<InGuild>>;
+  protected constructor(channel: TextBasedChannel, iterable?: Iterable<RawMessageData>);
+  public channel: TextBasedChannel;
   public delete(message: MessageResolvable): Promise<void>;
   public edit(
     message: MessageResolvable,
@@ -4026,6 +4025,15 @@ export class MessageManager<InGuild extends boolean = boolean> extends CachedMan
   public unpin(message: MessageResolvable, reason?: string): Promise<void>;
 }
 
+export class DMMessageManager extends MessageManager {
+  public channel: DMChannel;
+}
+
+export class GuildMessageManager extends MessageManager<true> {
+  public channel: GuildTextBasedChannel;
+  public crosspost(message: MessageResolvable): Promise<Message<true>>;
+}
+
 export class PermissionOverwriteManager extends CachedManager<
   Snowflake,
   PermissionOverwrites,
@@ -4192,7 +4200,7 @@ export interface TextBasedChannelFields<InGuild extends boolean = boolean>
   get lastMessage(): Message | null;
   lastPinTimestamp: number | null;
   get lastPinAt(): Date | null;
-  messages: MessageManager<InGuild>;
+  messages: If<InGuild, GuildMessageManager, DMMessageManager>;
   awaitMessageComponent<T extends MessageComponentType>(
     options?: AwaitMessageCollectorOptionsParams<T, true>,
   ): Promise<MappedInteractionTypes[T]>;

packages/discord.js/typings/index.test-d.ts

@@ -163,6 +163,8 @@ import {
   ThreadManager,
   FetchedThreads,
   FetchedThreadsMore,
+  DMMessageManager,
+  GuildMessageManager,
   ApplicationCommandChannelOptionData,
   ApplicationCommandChannelOption,
   ApplicationCommandChoicesOption,
@@ -349,6 +351,19 @@ declare const assertIsMessage: (m: Promise<Message>) => void;
 client.on('messageCreate', async message => {
   const { client, channel } = message;
 
+  // https://github.com/discordjs/discord.js/issues/8545
+  {
+    // These should not throw any errors when comparing messages from any source.
+    channel.messages.cache.filter(m => m);
+    (await channel.messages.fetch()).filter(m => m.author.id === message.author.id);
+
+    if (channel.isDMBased()) {
+      expectType<DMMessageManager>(channel.messages.channel.messages);
+    } else {
+      expectType<GuildMessageManager>(channel.messages.channel.messages);
+    }
+  }
+
   if (!message.inGuild() && message.partial) {
     expectNotType<never>(message);
   }
@@ -1519,7 +1534,7 @@ declare const guildChannelManager: GuildChannelManager;
   if (channel.isTextBased()) {
     const { messages } = channel;
     const message = await messages.fetch('123');
-    expectType<MessageManager<true>>(messages);
+    expectType<GuildMessageManager>(messages);
     expectType<Promise<Message<true>>>(messages.crosspost('1234567890'));
     expectType<Promise<Message<true>>>(messages.edit('1234567890', 'text'));
     expectType<Promise<Message<true>>>(messages.fetch('1234567890'));
@@ -1533,18 +1548,24 @@ declare const guildChannelManager: GuildChannelManager;
 {
   const { messages } = dmChannel;
   const message = await messages.fetch('123');
-  expectType<MessageManager<false>>(messages);
-  expectType<Promise<Message<false>>>(messages.crosspost('1234567890')); // This shouldn't even exist!
-  expectType<Promise<Message<false>>>(messages.edit('1234567890', 'text'));
-  expectType<Promise<Message<false>>>(messages.fetch('1234567890'));
-  expectType<Promise<Collection<Snowflake, Message<false>>>>(messages.fetchPinned());
-  expectType<null>(message.guild);
-  expectType<null>(message.guildId);
-  expectType<TextBasedChannel>(message.channel.messages.channel);
+  expectType<DMMessageManager>(messages);
+  expectType<Promise<Message>>(messages.edit('1234567890', 'text'));
+  expectType<Promise<Message>>(messages.fetch('1234567890'));
+  expectType<Promise<Collection<Snowflake, Message>>>(messages.fetchPinned());
+  expectType<Guild | null>(message.guild);
+  expectType<Snowflake | null>(message.guildId);
+  expectType<DMChannel | GuildTextBasedChannel>(message.channel.messages.channel);
+  expectType<MessageMentions>(message.mentions);
+  expectType<Guild | null>(message.mentions.guild);
+  expectType<Collection<Snowflake, GuildMember> | null>(message.mentions.members);
 
-  expectType<MessageMentions<false>>(message.mentions);
-  expectType<null>(message.mentions.guild);
-  expectType<null>(message.mentions.members);
+  if (messages.channel.isDMBased()) {
+    expectType<DMChannel>(messages.channel);
+    expectType<DMChannel>(messages.channel.messages.channel);
+  }
+
+  // @ts-expect-error Crossposting is not possible in direct messages.
+  messages.crosspost('1234567890');
 }
 
 declare const threadManager: ThreadManager;