feat: Guild Forum channel

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

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;