feat(minor): add application_id to Webhook (#7317)

Co-authored-by: Casper <53900565+Dev-CasperTheGhost@users.noreply.github.com>
Co-authored-by: Vlad Frangu <kingdgrizzle@gmail.com>
Co-authored-by: Almeida <almeidx@pm.me>
Co-authored-by: SpaceEEC <spaceeec@yahoo.com>

packages/discord.js/src/structures/Webhook.js

@@ -85,6 +85,16 @@ class Webhook {
       this.owner ??= null;
     }
 
+    if ('application_id' in data) {
+      /**
+       * The application that created this webhook
+       * @type {?Snowflake}
+       */
+      this.applicationId = data.application_id;
+    } else {
+      this.applicationId ??= null;
+    }
+
     if ('source_guild' in data) {
       /**
        * The source guild of the webhook
@@ -393,6 +403,22 @@ class Webhook {
     return this.avatar && this.client.rest.cdn.Avatar(this.id, this.avatar, options);
   }
 
+  /**
+   * Whether this webhook is created by a user.
+   * @returns {boolean}
+   */
+  isUserCreated() {
+    return Boolean(this.type === WebhookType.Incoming && this.owner && !this.owner.bot);
+  }
+
+  /**
+   * Whether this webhook is created by an application.
+   * @returns {boolean}
+   */
+  isApplicationCreated() {
+    return this.type === WebhookType.Application;
+  }
+
   /**
    * Whether or not this webhook is a channel follower webhook.
    * @returns {boolean}

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

@@ -2417,10 +2417,28 @@ export class Webhook extends WebhookMixin() {
   public sourceChannel: NewsChannel | APIPartialChannel | null;
   public token: string | null;
   public type: WebhookType;
-  public isIncoming(): this is this & { token: string };
+  public applicationId: Snowflake | null;
+  public isUserCreated(): this is this & {
+    type: WebhookType.Incoming;
+    applicationId: null;
+    owner: User | APIUser;
+  };
+  public isApplicationCreated(): this is this & {
+    type: WebhookType.Application;
+    applicationId: Snowflake;
+    owner: User | APIUser;
+  };
+  public isIncoming(): this is this & {
+    type: WebhookType.Incoming;
+    token: string;
+  };
   public isChannelFollower(): this is this & {
+    type: WebhookType.ChannelFollower;
     sourceGuild: Guild | APIPartialGuild;
     sourceChannel: NewsChannel | APIPartialChannel;
+    token: null;
+    applicationId: null;
+    owner: User | APIUser;
   };
 }