Repository: discordjs/discord.js
File: src/structures/ThreadChannel.js (JavaScript)

Code before:
   * @type {boolean}
   * @readonly
   */
  get joinable() {
    const permissions = this.permissionsFor(this.client.user);
    if (!permissions) return false;
    // This flag allows joining even if timed out
    if (permissions.has(Permissions.FLAGS.ADMINISTRATOR, false)) return true;

    return (
      !this.archived &&
      !this.joined &&
      permissions.has(
        this.type === 'GUILD_PRIVATE_THREAD' ? Permissions.FLAGS.MANAGE_THREADS : Permissions.FLAGS.VIEW_CHANNEL,
        false,
      ) &&
      this.guild.me.communicationDisabledUntilTimestamp < Date.now()
    );
  }

  /**
   * Whether the thread is manageable by the client user, for deleting or editing rateLimitPerUser or locked.
   * @type {boolean}
   * @readonly
   */
  get manageable() {
    const permissions = this.permissionsFor(this.client.user);
    if (!permissions) return false;
    // This flag allows managing even if timed out
    if (permissions.has(Permissions.FLAGS.ADMINISTRATOR, false)) return true;
    if (!permissions.has(Permissions.FLAGS.MANAGE_THREADS, false)) return false;
    return this.guild.me.communicationDisabledUntilTimestamp < Date.now();
  }

  /**
   * Whether the thread is viewable by the client user
   * @type {boolean}
   * @readonly
   */
  get viewable() {
    if (this.client.user.id === this.guild.ownerId) return true;
    const permissions = this.permissionsFor(this.client.user);
    if (!permissions) return false;
    return permissions.has(Permissions.FLAGS.VIEW_CHANNEL, false);
  }

  /**
   * Whether the client user can send messages in this thread
   * @type {boolean}
   * @readonly
   */

Review comment (security):
Can't we use a single return for `MANAGE_THREADS` and `timeouts` here?
```suggestion
    return this.guild.me.communicationDisabledUntilTimestamp < Date.now() && permissions.has(Permissions.FLAGS.MANAGE_THREADS, false);
```

Code after:
   * @type {boolean}
   * @readonly
   */
  get joinable() {
    return (
      !this.archived &&
      !this.joined &&
      this.permissionsFor(this.client.user)?.has(
        this.type === 'GUILD_PRIVATE_THREAD' ? Permissions.FLAGS.MANAGE_THREADS : Permissions.FLAGS.VIEW_CHANNEL,
        false,
      )
    );
  }

  /**
   * Whether the thread is manageable by the client user, for deleting or editing rateLimitPerUser or locked.
   * @type {boolean}
   * @readonly
   */
  get manageable() {
    const permissions = this.permissionsFor(this.client.user);
    if (!permissions) return false;
    // This flag allows managing even if timed out
    if (permissions.has(Permissions.FLAGS.ADMINISTRATOR, false)) return true;

    return (
      this.guild.me.communicationDisabledUntilTimestamp < Date.now() &&
      permissions.has(Permissions.FLAGS.MANAGE_THREADS, false)
    );
  }

  /**
   * Whether the thread is viewable by the client user
   * @type {boolean}
   * @readonly
   */
  get viewable() {
    if (this.client.user.id === this.guild.ownerId) return true;
    const permissions = this.permissionsFor(this.client.user);
    if (!permissions) return false;
    return permissions.has(Permissions.FLAGS.VIEW_CHANNEL, false);
  }

  /**
   * Whether the client user can send messages in this thread
   * @type {boolean}
   * @readonly
   */
  get sendable() {
    const permissions = this.permissionsFor(this.client.user);
    if (!permissions) return false;