feat: Guild Forum channel

https://github.com/discordjs/discord.js/pull/8651

src/client/actions/WebhooksUpdate.js

@@ -10,7 +10,7 @@ class WebhooksUpdate extends Action {
     /**
      * Emitted whenever a channel has its webhooks changed.
      * @event Client#webhookUpdate
-     * @param {TextChannel|NewsChannel|VoiceChannel} channel The channel that had a webhook update
+     * @param {TextChannel|NewsChannel|VoiceChannel|ForumChannel} channel The channel that had a webhook update
      */
     if (channel) client.emit(Events.WEBHOOKS_UPDATE, channel);
   }

src/errors/Messages.js

@@ -207,6 +207,8 @@ const Messages = {
   NITRO_REQUIRED: 'This feature is only available for Nitro users.',
   NITRO_BOOST_REQUIRED: feature => `This feature (${feature}) is only available for Nitro Boost users.`,
   ONLY_ME: 'This feature is only available for self.',
+
+  GUILD_FORUM_MESSAGE_REQUIRED: 'You must provide a message to create a guild forum thread',
 };
 
 for (const [name, message] of Object.entries(Messages)) register(name, message);

src/managers/GuildChannelManager.js

@@ -9,10 +9,11 @@ const GuildChannel = require('../structures/GuildChannel');
 const PermissionOverwrites = require('../structures/PermissionOverwrites');
 const ThreadChannel = require('../structures/ThreadChannel');
 const Webhook = require('../structures/Webhook');
-const { ThreadChannelTypes, ChannelTypes, VideoQualityModes } = require('../util/Constants');
+const ChannelFlags = require('../util/ChannelFlags');
+const { ThreadChannelTypes, ChannelTypes, VideoQualityModes, SortOrderTypes } = require('../util/Constants');
 const DataResolver = require('../util/DataResolver');
 const Util = require('../util/Util');
-const { resolveAutoArchiveMaxLimit } = require('../util/Util');
+const { resolveAutoArchiveMaxLimit, transformGuildForumTag, transformGuildDefaultReaction } = require('../util/Util');
 
 let cacheWarningEmitted = false;
 let storeChannelDeprecationEmitted = false;
@@ -73,8 +74,9 @@ class GuildChannelManager extends CachedManager {
    * Data that can be resolved to give a Guild Channel object. This can be:
    * * A GuildChannel object
    * * A ThreadChannel object
+   * * A ForumChannel object
    * * A Snowflake
-   * @typedef {GuildChannel|ThreadChannel|Snowflake} GuildChannelResolvable
+   * @typedef {GuildChannel|ThreadChannel|ForumChannel|Snowflake} GuildChannelResolvable
    */
 
   /**
@@ -138,6 +140,10 @@ class GuildChannelManager extends CachedManager {
       position,
       rateLimitPerUser,
       rtcRegion,
+      videoQualityMode,
+      availableTags,
+      defaultReactionEmoji,
+      defaultSortOrder,
       reason,
     } = {},
   ) {
@@ -145,6 +151,10 @@ class GuildChannelManager extends CachedManager {
     permissionOverwrites &&= permissionOverwrites.map(o => PermissionOverwrites.resolve(o, this.guild));
     const intType = typeof type === 'number' ? type : ChannelTypes[type] ?? ChannelTypes.GUILD_TEXT;
 
+    const videoMode = typeof videoQualityMode === 'number' ? videoQualityMode : VideoQualityModes[videoQualityMode];
+
+    const sortMode = typeof defaultSortOrder === 'number' ? defaultSortOrder : SortOrderTypes[defaultSortOrder];
+
     if (intType === ChannelTypes.GUILD_STORE && !storeChannelDeprecationEmitted) {
       storeChannelDeprecationEmitted = true;
       process.emitWarning(
@@ -167,6 +177,10 @@ class GuildChannelManager extends CachedManager {
         permission_overwrites: permissionOverwrites,
         rate_limit_per_user: rateLimitPerUser,
         rtc_region: rtcRegion,
+        video_quality_mode: videoMode,
+        available_tags: availableTags?.map(availableTag => transformGuildForumTag(availableTag)),
+        default_reaction_emoji: defaultReactionEmoji && transformGuildDefaultReaction(defaultReactionEmoji),
+        default_sort_order: sortMode,
       },
       reason,
     });
@@ -224,6 +238,11 @@ class GuildChannelManager extends CachedManager {
    * The default auto archive duration for all new threads in this channel
    * @property {?string} [rtcRegion] The RTC region of the channel
    * @property {?VideoQualityMode|number} [videoQualityMode] The camera video quality mode of the channel
+   * @property {ChannelFlagsResolvable} [flags] The flags to set on the channel
+   * @property {GuildForumTagData[]} [availableTags] The tags to set as available in a forum channel
+   * @property {?DefaultReactionEmoji} [defaultReactionEmoji] The emoji to set as the default reaction emoji
+   * @property {number} [defaultThreadRateLimitPerUser] The rate limit per user (slowmode) to set on forum posts
+   * @property {?SortOrderType} [defaultSortOrder] The default sort order mode to set on the channel
    */
 
   /**
@@ -282,6 +301,12 @@ class GuildChannelManager extends CachedManager {
         rate_limit_per_user: data.rateLimitPerUser,
         default_auto_archive_duration: defaultAutoArchiveDuration,
         permission_overwrites,
+        available_tags: data.availableTags?.map(availableTag => transformGuildForumTag(availableTag)),
+        default_reaction_emoji: data.defaultReactionEmoji && transformGuildDefaultReaction(data.defaultReactionEmoji),
+        default_thread_rate_limit_per_user: data.defaultThreadRateLimitPerUser,
+        flags: 'flags' in data ? ChannelFlags.resolve(data.flags) : undefined,
+        default_sort_order:
+          typeof data.defaultSortOrder === 'string' ? SortOrderTypes[data.defaultSortOrder] : data.defaultSortOrder,
       },
       reason,
     });

src/managers/GuildForumThreadManager.js

@@ -0,0 +1,92 @@
+'use strict';
+
+const ThreadManager = require('./ThreadManager');
+const { TypeError } = require('../errors');
+const MessagePayload = require('../structures/MessagePayload');
+const { resolveAutoArchiveMaxLimit } = require('../util/Util');
+
+/**
+ * Manages API methods for threads in forum channels and stores their cache.
+ * @extends {ThreadManager}
+ */
+class GuildForumThreadManager extends ThreadManager {
+  /**
+   * The channel this Manager belongs to
+   * @name GuildForumThreadManager#channel
+   * @type {ForumChannel}
+   */
+
+  /**
+   * @typedef {BaseMessageOptions} GuildForumThreadMessageCreateOptions
+   * @property {stickers} [stickers] The stickers to send with the message
+   * @property {BitFieldResolvable} [flags] The flags to send with the message
+   */
+
+  /**
+   * Options for creating a thread.
+   * @typedef {StartThreadOptions} GuildForumThreadCreateOptions
+   * @property {GuildForumThreadMessageCreateOptions|MessagePayload} message The message associated with the thread post
+   * @property {Snowflake[]} [appliedTags] The tags to apply to the thread
+   */
+
+  /**
+   * Creates a new thread in the channel.
+   * @param {GuildForumThreadCreateOptions} [options] Options to create a new thread
+   * @returns {Promise<ThreadChannel>}
+   * @example
+   * // Create a new forum post
+   * forum.threads
+   *   .create({
+   *     name: 'Food Talk',
+   *     autoArchiveDuration: 60,
+   *     message: {
+   *      content: 'Discuss your favorite food!',
+   *     },
+   *     reason: 'Needed a separate thread for food',
+   *   })
+   *   .then(threadChannel => console.log(threadChannel))
+   *   .catch(console.error);
+   */
+  async create({
+    name,
+    autoArchiveDuration = this.channel.defaultAutoArchiveDuration,
+    message,
+    reason,
+    rateLimitPerUser,
+    appliedTags,
+  } = {}) {
+    let path = this.client.api.channels(this.channel.id);
+
+    if (!message) {
+      throw new TypeError('GUILD_FORUM_MESSAGE_REQUIRED');
+    }
+
+    let messagePayload;
+
+    if (message instanceof MessagePayload) {
+      messagePayload = message.resolveData();
+    } else {
+      messagePayload = MessagePayload.create(this, message).resolveData();
+    }
+
+    const { data: body, files } = await messagePayload.resolveFiles();
+
+    if (autoArchiveDuration === 'MAX') autoArchiveDuration = resolveAutoArchiveMaxLimit(this.channel.guild);
+
+    const data = await path.threads.post({
+      data: {
+        name,
+        auto_archive_duration: autoArchiveDuration,
+        rate_limit_per_user: rateLimitPerUser,
+        applied_tags: appliedTags,
+        message: body,
+      },
+      files,
+      reason,
+    });
+
+    return this.client.actions.ThreadCreate.handle(data).thread;
+  }
+}
+
+module.exports = GuildForumThreadManager;

src/managers/GuildTextThreadManager.js

@@ -0,0 +1,98 @@
+'use strict';
+
+const ThreadManager = require('./ThreadManager');
+const { TypeError } = require('../errors');
+const { ChannelTypes } = require('../util/Constants');
+const { resolveAutoArchiveMaxLimit } = require('../util/Util');
+
+/**
+ * Manages API methods for {@link ThreadChannel} objects and stores their cache.
+ * @extends {ThreadManager}
+ */
+class GuildTextThreadManager extends ThreadManager {
+  /**
+   * The channel this Manager belongs to
+   * @name GuildTextThreadManager#channel
+   * @type {TextChannel|NewsChannel}
+   */
+
+  /**
+   * Options for creating a thread. <warn>Only one of `startMessage` or `type` can be defined.</warn>
+   * @typedef {StartThreadOptions} GuildTextThreadCreateOptions
+   * @property {MessageResolvable} [startMessage] The message to start a thread from. <warn>If this is defined then type
+   * of thread gets automatically defined and cannot be changed. The provided `type` field will be ignored</warn>
+   * @property {ThreadChannelTypes|number} [type] The type of thread to create. Defaults to `GUILD_PUBLIC_THREAD` if
+   * created in a {@link TextChannel} <warn>When creating threads in a {@link NewsChannel} this is ignored and is always
+   * `GUILD_NEWS_THREAD`</warn>
+   * @property {boolean} [invitable] Whether non-moderators can add other non-moderators to the thread
+   * <info>Can only be set when type will be `GUILD_PRIVATE_THREAD`</info>
+   * @property {number} [rateLimitPerUser] The rate limit per user (slowmode) for the new channel in seconds
+   */
+
+  /**
+   * Creates a new thread in the channel.
+   * @param {GuildTextThreadCreateOptions} [options] Options to create a new thread
+   * @returns {Promise<ThreadChannel>}
+   * @example
+   * // Create a new public thread
+   * channel.threads
+   *   .create({
+   *     name: 'food-talk',
+   *     autoArchiveDuration: 60,
+   *     reason: 'Needed a separate thread for food',
+   *   })
+   *   .then(threadChannel => console.log(threadChannel))
+   *   .catch(console.error);
+   * @example
+   * // Create a new private thread
+   * channel.threads
+   *   .create({
+   *      name: 'mod-talk',
+   *      autoArchiveDuration: 60,
+   *      type: 'GUILD_PRIVATE_THREAD',
+   *      reason: 'Needed a separate thread for moderation',
+   *    })
+   *   .then(threadChannel => console.log(threadChannel))
+   *   .catch(console.error);
+   */
+  async create({
+    name,
+    autoArchiveDuration = this.channel.defaultAutoArchiveDuration,
+    startMessage,
+    type,
+    invitable,
+    reason,
+    rateLimitPerUser,
+  } = {}) {
+    let path = this.client.api.channels(this.channel.id);
+    if (type && typeof type !== 'string' && typeof type !== 'number') {
+      throw new TypeError('INVALID_TYPE', 'type', 'ThreadChannelType or Number');
+    }
+    let resolvedType =
+      this.channel.type === 'GUILD_NEWS' ? ChannelTypes.GUILD_NEWS_THREAD : ChannelTypes.GUILD_PUBLIC_THREAD;
+    if (startMessage) {
+      const startMessageId = this.channel.messages.resolveId(startMessage);
+      if (!startMessageId) throw new TypeError('INVALID_TYPE', 'startMessage', 'MessageResolvable');
+      path = path.messages(startMessageId);
+    } else if (this.channel.type !== 'GUILD_NEWS') {
+      resolvedType = typeof type === 'string' ? ChannelTypes[type] : type ?? resolvedType;
+    }
+
+    if (autoArchiveDuration === 'MAX') autoArchiveDuration = resolveAutoArchiveMaxLimit(this.channel.guild);
+
+    const data = await path.threads.post({
+      data: {
+        name,
+        auto_archive_duration: autoArchiveDuration,
+        type: resolvedType,
+        invitable: resolvedType === ChannelTypes.GUILD_PRIVATE_THREAD ? invitable : undefined,
+        rate_limit_per_user: rateLimitPerUser,
+      },
+      reason,
+    });
+
+    return this.client.actions.ThreadCreate.handle(data).thread;
+  }
+}
+
+module.exports = GuildTextThreadManager;

src/managers/ThreadManager.js

@@ -4,8 +4,6 @@ const { Collection } = require('@discordjs/collection');
 const CachedManager = require('./CachedManager');
 const { TypeError } = require('../errors');
 const ThreadChannel = require('../structures/ThreadChannel');
-const { ChannelTypes } = require('../util/Constants');
-const { resolveAutoArchiveMaxLimit } = require('../util/Util');
 
 /**
  * Manages API methods for {@link ThreadChannel} objects and stores their cache.
@@ -60,84 +58,6 @@ class ThreadManager extends CachedManager {
    * @returns {?Snowflake}
    */
 
-  /**
-   * Options for creating a thread. <warn>Only one of `startMessage` or `type` can be defined.</warn>
-   * @typedef {StartThreadOptions} ThreadCreateOptions
-   * @property {MessageResolvable} [startMessage] The message to start a thread from. <warn>If this is defined then type
-   * of thread gets automatically defined and cannot be changed. The provided `type` field will be ignored</warn>
-   * @property {ThreadChannelTypes|number} [type] The type of thread to create. Defaults to `GUILD_PUBLIC_THREAD` if
-   * created in a {@link TextChannel} <warn>When creating threads in a {@link NewsChannel} this is ignored and is always
-   * `GUILD_NEWS_THREAD`</warn>
-   * @property {boolean} [invitable] Whether non-moderators can add other non-moderators to the thread
-   * <info>Can only be set when type will be `GUILD_PRIVATE_THREAD`</info>
-   * @property {number} [rateLimitPerUser] The rate limit per user (slowmode) for the new channel in seconds
-   */
-
-  /**
-   * Creates a new thread in the channel.
-   * @param {ThreadCreateOptions} [options] Options to create a new thread
-   * @returns {Promise<ThreadChannel>}
-   * @example
-   * // Create a new public thread
-   * channel.threads
-   *   .create({
-   *     name: 'food-talk',
-   *     autoArchiveDuration: 60,
-   *     reason: 'Needed a separate thread for food',
-   *   })
-   *   .then(threadChannel => console.log(threadChannel))
-   *   .catch(console.error);
-   * @example
-   * // Create a new private thread
-   * channel.threads
-   *   .create({
-   *      name: 'mod-talk',
-   *      autoArchiveDuration: 60,
-   *      type: 'GUILD_PRIVATE_THREAD',
-   *      reason: 'Needed a separate thread for moderation',
-   *    })
-   *   .then(threadChannel => console.log(threadChannel))
-   *   .catch(console.error);
-   */
-  async create({
-    name,
-    autoArchiveDuration = this.channel.defaultAutoArchiveDuration,
-    startMessage,
-    type,
-    invitable,
-    reason,
-    rateLimitPerUser,
-  } = {}) {
-    let path = this.client.api.channels(this.channel.id);
-    if (type && typeof type !== 'string' && typeof type !== 'number') {
-      throw new TypeError('INVALID_TYPE', 'type', 'ThreadChannelType or Number');
-    }
-    let resolvedType =
-      this.channel.type === 'GUILD_NEWS' ? ChannelTypes.GUILD_NEWS_THREAD : ChannelTypes.GUILD_PUBLIC_THREAD;
-    if (startMessage) {
-      const startMessageId = this.channel.messages.resolveId(startMessage);
-      if (!startMessageId) throw new TypeError('INVALID_TYPE', 'startMessage', 'MessageResolvable');
-      path = path.messages(startMessageId);
-    } else if (this.channel.type !== 'GUILD_NEWS') {
-      resolvedType = typeof type === 'string' ? ChannelTypes[type] : type ?? resolvedType;
-    }
-
-    if (autoArchiveDuration === 'MAX') autoArchiveDuration = resolveAutoArchiveMaxLimit(this.channel.guild);
-
-    const data = await path.threads.post({
-      data: {
-        name,
-        auto_archive_duration: autoArchiveDuration,
-        type: resolvedType,
-        invitable: resolvedType === ChannelTypes.GUILD_PRIVATE_THREAD ? invitable : undefined,
-        rate_limit_per_user: rateLimitPerUser,
-      },
-      reason,
-    });
-
-    return this.client.actions.ThreadCreate.handle(data).thread;
-  }
-
   /**
    * The options for fetching multiple threads, the properties are mutually exclusive
    * @typedef {Object} FetchThreadsOptions

src/structures/BaseGuildTextChannel.js

@@ -2,8 +2,8 @@
 
 const GuildChannel = require('./GuildChannel');
 const TextBasedChannel = require('./interfaces/TextBasedChannel');
+const GuildTextThreadManager = require('../managers/GuildTextThreadManager');
 const MessageManager = require('../managers/MessageManager');
-const ThreadManager = require('../managers/ThreadManager');
 
 /**
  * Represents a text-based guild channel on Discord.
@@ -22,9 +22,9 @@ class BaseGuildTextChannel extends GuildChannel {
 
     /**
      * A manager of the threads belonging to this channel
-     * @type {ThreadManager}
+     * @type {GuildTextThreadManager}
      */
-    this.threads = new ThreadManager(this);
+    this.threads = new GuildTextThreadManager(this);
 
     /**
      * If the guild considers this channel NSFW

src/structures/CategoryChannel.js

@@ -40,6 +40,11 @@ class CategoryChannel extends GuildChannel {
    * @property {number} [position] Position of the new channel
    * @property {number} [rateLimitPerUser] The rate limit per user (slowmode) for the new channel in seconds
    * @property {string} [rtcRegion] The specific region of the new channel.
+   * @property {VideoQualityMode} [videoQualityMode] The camera video quality mode of the voice channel
+   * @property {GuildForumTagData[]} [availableTags] The tags that can be used in this channel (forum only).
+   * @property {DefaultReactionEmoji} [defaultReactionEmoji]
+   * The emoji to show in the add reaction button on a thread in a guild forum channel.
+   * @property {SortOrderType} [defaultSortOrder] The default sort order mode used to order posts (forum only).
    * @property {string} [reason] Reason for creating the new channel
    */
 

src/structures/Channel.js

@@ -11,6 +11,8 @@ let TextChannel;
 let ThreadChannel;
 let VoiceChannel;
 let DirectoryChannel;
+let ForumChannel;
+const ChannelFlags = require('../util/ChannelFlags');
 const { ChannelTypes, ThreadChannelTypes, VoiceBasedChannelTypes } = require('../util/Constants');
 const SnowflakeUtil = require('../util/SnowflakeUtil');
 // Const { ApplicationCommand } = require('discord.js-selfbot-v13'); - Not being used in this file, not necessary.
@@ -48,6 +50,17 @@ class Channel extends Base {
      * @type {Snowflake}
      */
     this.id = data.id;
+
+    if ('flags' in data) {
+      /**
+       * The flags that are applied to the channel.
+       * <info>This is only `null` in a {@link PartialGroupDMChannel}. In all other cases, it is not `null`.</info>
+       * @type {?Readonly<ChannelFlags>}
+       */
+      this.flags = new ChannelFlags(data.flags).freeze();
+    } else {
+      this.flags ??= new ChannelFlags().freeze();
+    }
   }
 
   /**
@@ -184,6 +197,7 @@ class Channel extends Base {
     ThreadChannel ??= require('./ThreadChannel');
     VoiceChannel ??= require('./VoiceChannel');
     DirectoryChannel ??= require('./DirectoryChannel');
+    ForumChannel ??= require('./ForumChannel');
 
     let channel;
     if (!data.guild_id && !guild) {
@@ -232,6 +246,9 @@ class Channel extends Base {
           case ChannelTypes.GUILD_DIRECTORY:
             channel = new DirectoryChannel(client, data);
             break;
+          case ChannelTypes.GUILD_FORUM:
+            channel = new ForumChannel(guild, data, client);
+            break;
         }
         if (channel && !allowUnknownGuild) guild.channels?.cache.set(channel.id, channel);
       }

src/structures/ForumChannel.js

@@ -0,0 +1,249 @@
+'use strict';
+
+const GuildChannel = require('./GuildChannel');
+const TextBasedChannel = require('./interfaces/TextBasedChannel');
+const GuildForumThreadManager = require('../managers/GuildForumThreadManager');
+const { SortOrderTypes } = require('../util/Constants');
+const { transformAPIGuildForumTag, transformAPIGuildDefaultReaction } = require('../util/Util');
+
+/**
+ * @typedef {Object} GuildForumTagEmoji
+ * @property {?Snowflake} id The id of a guild's custom emoji
+ * @property {?string} name The unicode character of the emoji
+ */
+
+/**
+ * @typedef {Object} GuildForumTag
+ * @property {Snowflake} id The id of the tag
+ * @property {string} name The name of the tag
+ * @property {boolean} moderated Whether this tag can only be added to or removed from threads
+ * by a member with the `ManageThreads` permission
+ * @property {?GuildForumTagEmoji} emoji The emoji of this tag
+ */
+
+/**
+ * @typedef {Object} GuildForumTagData
+ * @property {Snowflake} [id] The id of the tag
+ * @property {string} name The name of the tag
+ * @property {boolean} [moderated] Whether this tag can only be added to or removed from threads
+ * by a member with the `ManageThreads` permission
+ * @property {?GuildForumTagEmoji} [emoji] The emoji of this tag
+ */
+
+/**
+ * @typedef {Object} DefaultReactionEmoji
+ * @property {?Snowflake} id The id of a guild's custom emoji
+ * @property {?string} name The unicode character of the emoji
+ */
+
+/**
+ * Represents a channel that only contains threads
+ * @extends {GuildChannel}
+ * @implements {TextBasedChannel}
+ */
+class ForumChannel extends GuildChannel {
+  constructor(guild, data, client) {
+    super(guild, data, client, false);
+
+    /**
+     * A manager of the threads belonging to this channel
+     * @type {GuildForumThreadManager}
+     */
+    this.threads = new GuildForumThreadManager(this);
+
+    this._patch(data);
+  }
+
+  _patch(data) {
+    super._patch(data);
+    if ('available_tags' in data) {
+      /**
+       * The set of tags that can be used in this channel.
+       * @type {GuildForumTag[]}
+       */
+      this.availableTags = data.available_tags.map(tag => transformAPIGuildForumTag(tag));
+    } else {
+      this.availableTags ??= [];
+    }
+
+    if ('default_reaction_emoji' in data) {
+      /**
+       * The emoji to show in the add reaction button on a thread in a guild forum channel
+       * @type {?DefaultReactionEmoji}
+       */
+      this.defaultReactionEmoji = data.default_reaction_emoji
+        ? transformAPIGuildDefaultReaction(data.default_reaction_emoji)
+        : null;
+    } else {
+      this.defaultReactionEmoji ??= null;
+    }
+
+    if ('default_thread_rate_limit_per_user' in data) {
+      /**
+       * The initial rate limit per user (slowmode) to set on newly created threads in a channel.
+       * @type {?number}
+       */
+      this.defaultThreadRateLimitPerUser = data.default_thread_rate_limit_per_user;
+    } else {
+      this.defaultThreadRateLimitPerUser ??= null;
+    }
+
+    if ('rate_limit_per_user' in data) {
+      /**
+       * The rate limit per user (slowmode) for this channel.
+       * @type {?number}
+       */
+      this.rateLimitPerUser = data.rate_limit_per_user;
+    } else {
+      this.rateLimitPerUser ??= null;
+    }
+
+    if ('default_auto_archive_duration' in data) {
+      /**
+       * The default auto archive duration for newly created threads in this channel.
+       * @type {?ThreadAutoArchiveDuration}
+       */
+      this.defaultAutoArchiveDuration = data.default_auto_archive_duration;
+    } else {
+      this.defaultAutoArchiveDuration ??= null;
+    }
+
+    if ('nsfw' in data) {
+      /**
+       * If this channel is considered NSFW.
+       * @type {boolean}
+       */
+      this.nsfw = data.nsfw;
+    } else {
+      this.nsfw ??= false;
+    }
+
+    if ('topic' in data) {
+      /**
+       * The topic of this channel.
+       * @type {?string}
+       */
+      this.topic = data.topic;
+    }
+
+    if ('default_sort_order' in data) {
+      /**
+       * The default sort order mode used to order posts
+       * @type {?SortOrderType}
+       */
+      this.defaultSortOrder = SortOrderTypes[data.default_sort_order];
+    } else {
+      this.defaultSortOrder ??= null;
+    }
+  }
+
+  /**
+   * Sets the available tags for this forum channel
+   * @param {GuildForumTagData[]} availableTags The tags to set as available in this channel
+   * @param {string} [reason] Reason for changing the available tags
+   * @returns {Promise<ForumChannel>}
+   */
+  setAvailableTags(availableTags, reason) {
+    return this.edit({ availableTags, reason });
+  }
+
+  /**
+   * Sets the default reaction emoji for this channel
+   * @param {?DefaultReactionEmoji} defaultReactionEmoji The emoji to set as the default reaction emoji
+   * @param {string} [reason] Reason for changing the default reaction emoji
+   * @returns {Promise<ForumChannel>}
+   */
+  setDefaultReactionEmoji(defaultReactionEmoji, reason) {
+    return this.edit({ defaultReactionEmoji, reason });
+  }
+
+  /**
+   * Sets the default rate limit per user (slowmode) for new threads in this channel
+   * @param {number} defaultThreadRateLimitPerUser The rate limit to set on newly created threads in this channel
+   * @param {string} [reason] Reason for changing the default rate limit
+   * @returns {Promise<ForumChannel>}
+   */
+  setDefaultThreadRateLimitPerUser(defaultThreadRateLimitPerUser, reason) {
+    return this.edit({ defaultThreadRateLimitPerUser, reason });
+  }
+
+  /**
+   * Sets the default sort order mode used to order posts
+   * @param {?SortOrderType} defaultSortOrder The default sort order mode to set on this channel
+   * @param {string} [reason] Reason for changing the default sort order
+   * @returns {Promise<ForumChannel>}
+   */
+  setDefaultSortOrder(defaultSortOrder, reason) {
+    return this.edit({ defaultSortOrder, reason });
+  }
+
+  /**
+   * Creates an invite to this guild channel.
+   * @param {CreateInviteOptions} [options={}] The options for creating the invite
+   * @returns {Promise<Invite>}
+   * @example
+   * // Create an invite to a channel
+   * channel.createInvite()
+   *   .then(invite => console.log(`Created an invite with a code of ${invite.code}`))
+   *   .catch(console.error);
+   */
+  createInvite(options) {
+    return this.guild.invites.create(this.id, options);
+  }
+
+  /**
+   * Fetches a collection of invites to this guild channel.
+   * Resolves with a collection mapping invites by their codes.
+   * @param {boolean} [cache=true] Whether or not to cache the fetched invites
+   * @returns {Promise<Collection<string, Invite>>}
+   */
+  fetchInvites(cache = true) {
+    return this.guild.invites.fetch({ channelId: this.id, cache });
+  }
+
+  /**
+   * Sets the default auto archive duration for all newly created threads in this channel.
+   * @param {ThreadAutoArchiveDuration} defaultAutoArchiveDuration The new default auto archive duration
+   * @param {string} [reason] Reason for changing the channel's default auto archive duration
+   * @returns {Promise<ForumChannel>}
+   */
+  setDefaultAutoArchiveDuration(defaultAutoArchiveDuration, reason) {
+    return this.edit({ defaultAutoArchiveDuration, reason });
+  }
+
+  /**
+   * Sets a new topic for the guild channel.
+   * @param {?string} topic The new topic for the guild channel
+   * @param {string} [reason] Reason for changing the guild channel's topic
+   * @returns {Promise<ForumChannel>}
+   * @example
+   * // Set a new channel topic
+   * channel.setTopic('needs more rate limiting')
+   *   .then(newChannel => console.log(`Channel's new topic is ${newChannel.topic}`))
+   *   .catch(console.error);
+   */
+  setTopic(topic, reason) {
+    return this.edit({ topic, reason });
+  }
+
+  // These are here only for documentation purposes - they are implemented by TextBasedChannel
+  /* eslint-disable no-empty-function */
+  createWebhook() {}
+  fetchWebhooks() {}
+  setNSFW() {}
+  setRateLimitPerUser() {}
+}
+
+TextBasedChannel.applyToClass(ForumChannel, true, [
+  'send',
+  'lastMessage',
+  'lastPinAt',
+  'bulkDelete',
+  'sendTyping',
+  'createMessageCollector',
+  'awaitMessages',
+  'createMessageComponentCollector',
+  'awaitMessageComponent',
+]);
+
+module.exports = ForumChannel;

src/structures/Guild.js

@@ -564,7 +564,7 @@ class Guild extends AnonymousGuild {
 
   /**
    * Widget channel for this guild
-   * @type {?TextChannel}
+   * @type {?(TextChannel|NewsChannel|VoiceChannel|StageChannel|ForumChannel)}
    * @readonly
    */
   get widgetChannel() {

src/structures/GuildChannel.js

@@ -14,6 +14,7 @@ const Permissions = require('../util/Permissions');
  * - {@link NewsChannel}
  * - {@link StoreChannel}
  * - {@link StageChannel}
+ * - {@link ForumChannel}
  * @extends {Channel}
  * @abstract
  */

src/structures/Message.js

@@ -61,6 +61,17 @@ class Message extends Base {
      */
     this.id = data.id;
 
+    if ('position' in data) {
+      /**
+       * A generally increasing integer (there may be gaps or duplicates) that represents
+       * the approximate position of the message in a thread.
+       * @type {?number}
+       */
+      this.position = data.position;
+    } else {
+      this.position ??= null;
+    }
+
     /**
      * The timestamp the message was sent at
      * @type {number}
@@ -860,7 +871,7 @@ class Message extends Base {
 
   /**
    * Create a new public thread from this message
-   * @see ThreadManager#create
+   * @see GuildTextThreadManager#create
    * @param {StartThreadOptions} [options] Options for starting a thread on this message
    * @returns {Promise<ThreadChannel>}
    */

src/structures/MessagePayload.js

@@ -144,9 +144,11 @@ class MessagePayload {
 
     let username;
     let avatarURL;
+    let threadName;
     if (isWebhook) {
       username = this.options.username ?? this.target.name;
       if (this.options.avatarURL) avatarURL = this.options.avatarURL;
+      if (this.options.threadName) threadName = this.options.threadName;
     }
 
     let flags;
@@ -259,6 +261,7 @@ class MessagePayload {
       message_reference,
       attachments: this.options.attachments,
       sticker_ids: this.options.stickers?.map(sticker => sticker.id ?? sticker),
+      thread_name: threadName,
     };
     return this;
   }

src/structures/PartialGroupDMChannel.js

@@ -17,6 +17,10 @@ const DataResolver = require('../util/DataResolver');
 class PartialGroupDMChannel extends Channel {
   constructor(client, data) {
     super(client, data);
+
+    // No flags are present when fetching partial group DM channels.
+    this.flags = null;
+
     /**
      * The name of this Group DM Channel
      * @type {?string}

src/structures/ThreadChannel.js

@@ -158,9 +158,8 @@ class ThreadChannel extends Channel {
 
     if ('message_count' in data) {
       /**
-       * The approximate count of messages in this thread
-       * <info>This stops counting at 50. If you need an approximate value higher than that, use
-       * `ThreadChannel#messages.cache.size`</info>
+       * <info>Threads created before July 1, 2022 may have an inaccurate count.
+       * If you need an approximate value higher than that, use `ThreadChannel#messages.cache.size`</info>
        * @type {?number}
        */
       this.messageCount = data.message_count;
@@ -180,6 +179,27 @@ class ThreadChannel extends Channel {
       this.memberCount ??= null;
     }
 
+    if ('total_message_sent' in data) {
+      /**
+       * The number of messages ever sent in a thread, similar to {@link ThreadChannel#messageCount} except it
+       * will not decrement whenever a message is deleted
+       * @type {?number}
+       */
+      this.totalMessageSent = data.total_message_sent;
+    } else {
+      this.totalMessageSent ??= null;
+    }
+
+    if ('applied_tags' in data) {
+      /**
+       * The tags applied to this thread
+       * @type {Snowflake[]}
+       */
+      this.appliedTags = data.applied_tags;
+    } else {
+      this.appliedTags ??= [];
+    }
+
     if (data.member && this.client.user) this.members._add({ user_id: this.client.user.id, ...data.member });
     if (data.messages) for (const message of data.messages) this.messages._add(message);
   }
@@ -225,7 +245,7 @@ class ThreadChannel extends Channel {
 
   /**
    * The parent channel of this thread
-   * @type {?(NewsChannel|TextChannel)}
+   * @type {?(NewsChannel|TextChannel|ForumChannel)}
    * @readonly
    */
   get parent() {
@@ -280,14 +300,16 @@ class ThreadChannel extends Channel {
 
   /**
    * Fetches the message that started this thread, if any.
-   * <info>This only works when the thread started from a message in the parent channel, otherwise the promise will
-   * reject. If you just need the id of that message, use {@link ThreadChannel#id} instead.</info>
+   * <info>The `Promise` will reject if the original message in a forum post is deleted
+   * or when the original message in the parent channel is deleted.
+   * If you just need the id of that message, use {@link ThreadChannel#id} instead.</info>
    * @param {BaseFetchOptions} [options] Additional options for this fetch
    * @returns {Promise<Message|null>}
    */
   // eslint-disable-next-line require-await
   async fetchStarterMessage(options) {
-    return this.parent?.messages.fetch(this.id, options) ?? null;
+    const channel = this.parent?.type === 'GUILD_FORUM' ? this : this.parent;
+    return channel?.messages.fetch({ message: this.id, ...options }) ?? null;
   }
 
   /**
@@ -326,6 +348,7 @@ class ThreadChannel extends Channel {
         rate_limit_per_user: data.rateLimitPerUser,
         locked: data.locked,
         invitable: this.type === 'GUILD_PRIVATE_THREAD' ? data.invitable : undefined,
+        applied_tags: data.appliedTags,
       },
       reason,
     });
@@ -333,6 +356,16 @@ class ThreadChannel extends Channel {
     return this.client.actions.ChannelUpdate.handle(newData).updated;
   }
 
+  /**
+   * Set the applied tags for this channel (only applicable to forum threads)
+   * @param {Snowflake[]} appliedTags The tags to set for this channel
+   * @param {string} [reason] Reason for changing the thread's applied tags
+   * @returns {Promise<GuildForumThreadChannel>}
+   */
+  setAppliedTags(appliedTags, reason) {
+    return this.edit({ appliedTags, reason });
+  }
+
   /**
    * Sets whether the thread is archived.
    * @param {boolean} [archived=true] Whether the thread is archived

src/structures/Webhook.js

@@ -132,6 +132,7 @@ class Webhook {
    * Action rows containing interactive components for the message (buttons, select menus)
    * @property {Snowflake} [threadId] The id of the thread this message belongs to
    * <info>For interaction webhooks, this property is ignored</info>
+   * @property {string} [threadName] Name of the thread to create (only available if webhook is in a forum channel)
    */
 
   /**

src/structures/WelcomeChannel.js

@@ -42,7 +42,7 @@ class WelcomeChannel extends Base {
 
   /**
    * The channel of this welcome channel
-   * @type {?(TextChannel|NewsChannel|StoreChannel)}
+   * @type {?(TextChannel|NewsChannel|StoreChannel|ForumChannel)}
    */
   get channel() {
     return this.client.channels.resolve(this.channelId);

src/util/ChannelFlags.js

@@ -0,0 +1,45 @@
+'use strict';
+
+const BitField = require('./BitField');
+
+/**
+ * Data structure that makes it easy to interact with a {@link BaseChannel#flags} bitfield.
+ * @extends {BitField}
+ */
+class ChannelFlags extends BitField {}
+
+/**
+ * Numeric guild channel flags. All available properties:
+ * * `PINNED`
+ * * `REQUIRE_TAG`
+ * @type {Object}
+ * @see {@link https://discord.com/developers/docs/resources/channel#channel-object-channel-flags}
+ */
+ChannelFlags.FLAGS = {
+  PINNED: 1 << 1,
+  REQUIRE_TAG: 1 << 4,
+};
+
+/**
+ * @name ChannelFlags
+ * @kind constructor
+ * @memberof ChannelFlags
+ * @param {BitFieldResolvable} [bits=0] Bit(s) to read from
+ */
+
+/**
+ * Bitfield of the packed bits
+ * @type {number}
+ * @name ChannelFlags#bitfield
+ */
+
+/**
+ * Data that can be resolved to give a channel flag bitfield. This can be:
+ * * A string (see {@link ChannelFlags.FLAGS})
+ * * A channel flag
+ * * An instance of ChannelFlags
+ * * An Array of ChannelFlags
+ * @typedef {string|number|ChannelFlags|ChannelFlagsResolvable[]} ChannelFlagsResolvable
+ */
+
+module.exports = ChannelFlags;

src/util/Constants.js

@@ -1640,6 +1640,15 @@ exports.GuildScheduledEventEntityTypes = createEnum([null, 'STAGE_INSTANCE', 'VO
  */
 exports.VideoQualityModes = createEnum([null, 'AUTO', 'FULL']);
 
+/**
+ * Sort {@link ForumChannel} posts by ?
+ * * LATEST_ACTIVITY
+ * * CREATION_DATE
+ * @typedef {string} SortOrderType
+ * @see {@link https://discord.com/developers/docs/resources/channel/#channel-object-sort-order-types}
+ */
+exports.SortOrderTypes = createEnum([null, 'LATEST_ACTIVITY', 'CREATION_DATE']);
+
 exports._cleanupSymbol = Symbol('djsCleanup');
 
 function keyMirror(arr) {

src/util/Util.js

@@ -606,6 +606,71 @@ class Util extends null {
     let defaultValue;
     return () => (defaultValue ??= cb());
   }
+
+  /**
+   * Transforms an API guild forum tag to camel-cased guild forum tag.
+   * @param {APIGuildForumTag} tag The tag to transform
+   * @returns {GuildForumTag}
+   * @ignore
+   */
+  static transformAPIGuildForumTag(tag) {
+    return {
+      id: tag.id,
+      name: tag.name,
+      moderated: tag.moderated,
+      emoji:
+        tag.emoji_id ?? tag.emoji_name
+          ? {
+              id: tag.emoji_id,
+              name: tag.emoji_name,
+            }
+          : null,
+    };
+  }
+
+  /**
+   * Transforms a camel-cased guild forum tag to an API guild forum tag.
+   * @param {GuildForumTag} tag The tag to transform
+   * @returns {APIGuildForumTag}
+   * @ignore
+   */
+  static transformGuildForumTag(tag) {
+    return {
+      id: tag.id,
+      name: tag.name,
+      moderated: tag.moderated,
+      emoji_id: tag.emoji?.id ?? null,
+      emoji_name: tag.emoji?.name ?? null,
+    };
+  }
+
+  /**
+   * Transforms an API guild forum default reaction object to a
+   * camel-cased guild forum default reaction object.
+   * @param {APIGuildForumDefaultReactionEmoji} defaultReaction The default reaction to transform
+   * @returns {DefaultReactionEmoji}
+   * @ignore
+   */
+  static transformAPIGuildDefaultReaction(defaultReaction) {
+    return {
+      id: defaultReaction.emoji_id,
+      name: defaultReaction.emoji_name,
+    };
+  }
+
+  /**
+   * Transforms a camel-cased guild forum default reaction object to an
+   * API guild forum default reaction object.
+   * @param {DefaultReactionEmoji} defaultReaction The default reaction to transform
+   * @returns {APIGuildForumDefaultReactionEmoji}
+   * @ignore
+   */
+  static transformGuildDefaultReaction(defaultReaction) {
+    return {
+      emoji_id: defaultReaction.id,
+      emoji_name: defaultReaction.name,
+    };
+  }
 }
 
 module.exports = Util;