feat: add launch activity function

src/constants.ts

@@ -54,7 +54,9 @@ export enum InteractionResponseType {
    * Respond to an interaction with prompt for a premium subscription.
    * @deprecated Use `ComponentButtonPremium` instead.
    */
-  PREMIUM_REQUIRED = 10
+  PREMIUM_REQUIRED = 10,
+  /** Launch the activity for this application */
+  LAUNCH_ACTIVITY = 12
 }
 
 /** Message flags for interaction responses. */

src/structures/interfaces/messageInteraction.ts

@@ -235,6 +235,28 @@ export class MessageInteractionContext<
     return false;
   }
 
+  /**
+   * Launches the activity this app is associated with.
+   * @returns Whether the message passed
+   */
+  async launchActivity(): Promise<boolean> {
+    if (!this.initiallyResponded && !this.deferred) {
+      this.initiallyResponded = true;
+      this.deferred = true;
+      clearTimeout(this._timeout);
+      await this._respond({
+        status: 200,
+        body: {
+          type: InteractionResponseType.LAUNCH_ACTIVITY,
+          data: {}
+        }
+      });
+      return true;
+    }
+
+    return false;
+  }
+
   /**
    * Registers a component callback from the initial message.
    * This unregisters automatically when the context expires.