feat(ThreadChannel): add a helper for pin and unpin

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

@@ -1,6 +1,6 @@
 'use strict';
 
-const { ChannelType, PermissionFlagsBits, Routes } = require('discord-api-types/v10');
+const { ChannelType, PermissionFlagsBits, Routes, ChannelFlags } = require('discord-api-types/v10');
 const { BaseChannel } = require('./BaseChannel');
 const TextBasedChannel = require('./interfaces/TextBasedChannel');
 const { DiscordjsRangeError, ErrorCodes } = require('../errors');
@@ -457,6 +457,24 @@ class ThreadChannel extends BaseChannel {
     return this.edit({ appliedTags, reason });
   }
 
+  /**
+   * Pins this thread from the forum channel.
+   * @param {string} [reason] Reason for pinning
+   * @returns {Promise<ThreadChannel>}
+   */
+  pin(reason) {
+    return this.edit({ flags: this.flags.add(ChannelFlags.Pinned), reason });
+  }
+
+  /**
+   * Unpins this thread from the forum channel.
+   * @param {string} [reason] Reason for unpinning
+   * @returns {Promise<ThreadChannel>}
+   */
+  unpin(reason) {
+    return this.edit({ flags: this.flags.remove(ChannelFlags.Pinned), reason });
+  }
+
   /**
    * Whether the client user is a member of the thread.
    * @type {boolean}

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

@@ -2640,6 +2640,8 @@ export class ThreadChannel<Forum extends boolean = boolean> extends TextBasedCha
   public setLocked(locked?: boolean, reason?: string): Promise<AnyThreadChannel>;
   public setName(name: string, reason?: string): Promise<AnyThreadChannel>;
   public setAppliedTags(appliedTags: Snowflake[], reason?: string): Promise<ThreadChannel<true>>;
+  public pin(reason?: string): Promise<AnyThreadChannel>;
+  public unpin(reason?: string): Promise<AnyThreadChannel>;
   public toString(): ChannelMention;
 }