add ack api

src/client/InteractionClient.js

@@ -108,19 +108,30 @@ class InteractionClient extends BaseClient {
             r({
               type: InteractionResponseType.ACKNOWLEDGE_WITH_SOURCE,
             });
-          }, 500);
+          }, 250);
         });
 
-        const interaction = new Interaction(this.client, data, resolved => {
-          if (timedOut) {
-            return false;
-          }
-          resolve({
-            type: InteractionResponseType.CHANNEL_MESSAGE_WITH_SOURCE,
-            data: resolved.data,
-          });
-          return true;
-        });
+        const syncHandle = {
+          acknowledge() {
+            if (!timedOut) {
+              resolve({
+                type: InteractionResponseType.ACKNOWLEDGE_WITH_SOURCE,
+              });
+            }
+          },
+          reply(resolved) {
+            if (timedOut) {
+              return false;
+            }
+            resolve({
+              type: InteractionResponseType.CHANNEL_MESSAGE_WITH_SOURCE,
+              data: resolved.data,
+            });
+            return true;
+          },
+        };
+
+        const interaction = new Interaction(this.client, data, syncHandle);
 
         Promise.resolve(this.handler(interaction)).catch(e => {
           this.client.emit('error', e);
@@ -141,7 +152,7 @@ class InteractionClient extends BaseClient {
    * @returns {Function} The middleware function.
    */
   middleware() {
-    return async (req, res, next) => {
+    return async (req, res) => {
       const timestamp = req.get('x-signature-timestamp');
       const signature = req.get('x-signature-ed25519');
 
@@ -169,8 +180,6 @@ class InteractionClient extends BaseClient {
 
       const result = await this.handle(data);
       res.status(200).end(JSON.stringify(result));
-
-      next();
     };
   }
 

src/structures/Interaction.js

@@ -9,9 +9,9 @@ const Snowflake = require('../util/Snowflake');
  * @extends {Base}
  */
 class Interaction extends Base {
-  constructor(client, data, handler) {
+  constructor(client, data, syncHandle) {
     super(client);
-    this.handler = handler;
+    this.syncHandle = syncHandle;
     this._patch(data);
   }
 
@@ -83,6 +83,18 @@ class Interaction extends Base {
     return new Date(this.createdTimestamp);
   }
 
+  /**
+   * Acknowledge this interaction without content.
+   */
+  async acknowledge() {
+    await this.syncHandle.acknowledge();
+  }
+
+  /**
+   * Reply to this interaction.
+   * @param {(StringResolvable | APIMessage)?} content The content for the message.
+   * @param {(MessageOptions | MessageAdditions)?} options The options to provide.
+   */
   async reply(content, options) {
     let apiMessage;
 
@@ -91,13 +103,13 @@ class Interaction extends Base {
     } else {
       apiMessage = APIMessage.create(this, content, options).resolveData();
       if (Array.isArray(apiMessage.data.content)) {
-        throw new Error();
+        throw new Error('Message is too long');
       }
     }
 
     const resolved = await apiMessage.resolveFiles();
 
-    if (!this.handler(resolved)) {
+    if (!this.syncHandle.reply(resolved)) {
       const clientID =
         this.client.interactionClient.clientID || (await this.client.api.oauth2.applications('@me').get()).id;