feat(Guild#defaultMessageNotifications) (#2538)

* feat(Guild#defaultMessageNotifications)

* boolean -> DefaultMessageNotifications

* Space's requested change

src/structures/Guild.js

@@ -2,7 +2,7 @@ const Invite = require('./Invite');
 const GuildAuditLogs = require('./GuildAuditLogs');
 const Webhook = require('./Webhook');
 const VoiceRegion = require('./VoiceRegion');
-const { ChannelTypes, Events, browser } = require('../util/Constants');
+const { ChannelTypes, DefaultMessageNotifications, Events, browser } = require('../util/Constants');
 const Collection = require('../util/Collection');
 const Util = require('../util/Util');
 const DataResolver = require('../util/DataResolver');
@@ -188,6 +188,13 @@ class Guild extends Base {
      */
     this.joinedTimestamp = data.joined_at ? new Date(data.joined_at).getTime() : this.joinedTimestamp;
 
+    /**
+     * The value set for a guild's default message notifications
+     * @type {DefaultMessageNotifications|number}
+     */
+    this.defaultMessageNotifications = DefaultMessageNotifications[data.default_message_notifications] ||
+      data.default_message_notifications;
+
     this.id = data.id;
     this.available = !data.unavailable;
     this.features = data.features || this.features || [];

src/util/Constants.js

@@ -725,6 +725,17 @@ exports.APIErrors = {
   REACTION_BLOCKED: 90001,
 };
 
+/**
+ * The value set for a guild's default message notifications, e.g. `ALL`. Here are the available types:
+ * * ALL
+ * * MENTIONS
+ * @typedef {string} DefaultMessageNotifications
+ */
+exports.DefaultMessageNotifications = [
+  'ALL',
+  'MENTIONS',
+];
+
 function keyMirror(arr) {
   let tmp = Object.create(null);
   for (const value of arr) tmp[value] = value;