feat(Guild): add enum for premium_tier (#5868)

src/structures/Guild.js

@@ -27,6 +27,7 @@ const {
   NSFWLevels,
   Status,
   MFALevels,
+  PremiumTiers,
 } = require('../util/Constants');
 const DataResolver = require('../util/DataResolver');
 const SystemChannelFlags = require('../util/SystemChannelFlags');
@@ -217,19 +218,10 @@ class Guild extends BaseGuild {
     this.systemChannelID = data.system_channel_id;
 
     /**
-     * The type of premium tier:
+     * The premium tier of this guild
-     * * 0: NONE
-     * * 1: TIER_1
-     * * 2: TIER_2
-     * * 3: TIER_3
-     * @typedef {number} PremiumTier
-     */
-
-    /**
-     * The premium tier on this guild
      * @type {PremiumTier}
      */
-    this.premiumTier = data.premium_tier;
+    this.premiumTier = PremiumTiers[data.premium_tier];
 
     if (typeof data.premium_subscription_count !== 'undefined') {
       /**

src/util/Constants.js

@@ -865,6 +865,16 @@ exports.NSFWLevels = createEnum(['DEFAULT', 'EXPLICIT', 'SAFE', 'AGE_RESTRICTED'
  */
 exports.PrivacyLevels = createEnum([null, 'PUBLIC', 'GUILD_ONLY']);
 
+/**
+ * The premium tier (Server Boost level) of a guild:
+ * * NONE
+ * * TIER_1
+ * * TIER_2
+ * * TIER_3
+ * @typedef {string} PremiumTier
+ */
+exports.PremiumTiers = createEnum(['NONE', 'TIER_1', 'TIER_2', 'TIER_3']);
+
 function keyMirror(arr) {
   let tmp = Object.create(null);
   for (const value of arr) tmp[value] = value;

typings/index.d.ts

@@ -95,6 +95,13 @@ declare enum OverwriteTypes {
   member = 1,
 }
 
+declare enum PremiumTiers {
+  NONE = 0,
+  TIER_1 = 1,
+  TIER_2 = 2,
+  TIER_3 = 3,
+}
+
 declare enum PrivacyLevels {
   PUBLIC = 1,
   GUILD_ONLY = 2,
@@ -717,6 +724,7 @@ declare module 'discord.js' {
     NSFWLevels: typeof NSFWLevels;
     PrivacyLevels: typeof PrivacyLevels;
     WebhookTypes: typeof WebhookTypes;
+    PremiumTiers: typeof PremiumTiers;
   };
 
   export class DataResolver {
@@ -3605,7 +3613,7 @@ declare module 'discord.js' {
 
   type RecursiveReadonlyArray<T> = ReadonlyArray<T | RecursiveReadonlyArray<T>>;
 
-  type PremiumTier = 0 | 1 | 2 | 3;
+  type PremiumTier = keyof typeof PremiumTiers;
 
   interface PresenceData {
     status?: PresenceStatusData;