Backports (#1813)

* Backported OAuth2Application 201ecd25a2

* Backported retry on 500 57b6980313

* Backported b8034525e3 and fa5c4efa2b

src/structures/ClientUserGuildSettings.js

@@ -0,0 +1,58 @@
+const Constants = require('../util/Constants');
+const Collection = require('../util/Collection');
+const ClientUserChannelOverride = require('./ClientUserChannelOverride');
+
+/**
+ * A wrapper around the ClientUser's guild settings.
+ */
+class ClientUserGuildSettings {
+  constructor(data, client) {
+    /**
+     * The client that created the instance of the ClientUserGuildSettings
+     * @name ClientUserGuildSettings#client
+     * @type {Client}
+     * @readonly
+     */
+    Object.defineProperty(this, 'client', { value: client });
+    /**
+     * The ID of the guild this settings are for
+     * @type {Snowflake}
+     */
+    this.guildID = data.guild_id;
+    this.channelOverrides = new Collection();
+    this.patch(data);
+  }
+
+  /**
+   * Patch the data contained in this class with new partial data.
+   * @param {Object} data Data to patch this with
+   */
+  patch(data) {
+    for (const key of Object.keys(Constants.UserGuildSettingsMap)) {
+      const value = Constants.UserGuildSettingsMap[key];
+      if (!data.hasOwnProperty(key)) continue;
+      if (key === 'channel_overrides') {
+        for (const channel of data[key]) {
+          this.channelOverrides.set(channel.channel_id,
+            new ClientUserChannelOverride(channel));
+        }
+      } else if (typeof value === 'function') {
+        this[value.name] = value(data[key]);
+      } else {
+        this[value] = data[key];
+      }
+    }
+  }
+
+  /**
+   * Update a specific property of the guild settings.
+   * @param {string} name Name of property
+   * @param {value} value Value to patch
+   * @returns {Promise<Object>}
+   */
+  update(name, value) {
+    return this.client.rest.methods.patchClientUserGuildSettings(this.guildID, { [name]: value });
+  }
+}
+
+module.exports = ClientUserGuildSettings;