feat: Added delay option for text messages (#1354)

Co-authored-by: joselourenco <joselourenco@flipfloplab.com.br>

src/chat/defaultSendMessageOptions.ts

@@ -32,4 +32,5 @@ export const defaultSendMessageOptions: AllMessageOptions = {
   linkPreview: true,
   markIsRead: true,
   waitForAck: true,
+  delay: 0,
 };

src/chat/functions/prepareRawMessage.ts

@@ -25,7 +25,12 @@ import {
   unixTime,
 } from '../../whatsapp/functions';
 import { defaultSendMessageOptions, RawMessage, SendMessageOptions } from '..';
-import { generateMessageID, getMessageById } from '.';
+import {
+  generateMessageID,
+  getMessageById,
+  markIsComposing,
+  markIsPaused,
+} from '.';
 
 /**
  * Prepare a raw message
@@ -53,6 +58,14 @@ export async function prepareRawMessage<T extends RawMessage>(
     ...message,
   };
 
+  if (options.delay && message.type === 'chat') {
+    await markIsComposing(chat.id);
+    await new Promise((resolve) =>
+      setTimeout(() => resolve(true), options.delay)
+    );
+    await markIsPaused(chat.id);
+  }
+
   if (message.type !== 'protocol') {
     const ephemeral = getEphemeralFields(chat);
 

src/chat/types.ts

@@ -103,6 +103,18 @@ export interface SendMessageOptions {
    * ```
    */
   waitForAck?: boolean;
+  /**
+   * Delay some time (in ms) before sending message
+   * While delaying, Typing Status is used to look like a human interaction
+   * @default 0
+   * @example
+   * ```javascript
+   * WPP.chat.sendTextMessage('[number]@c.us', 'Delay with typing', {
+   *   delay: 4000
+   * })
+   * ```
+   */
+  delay?: number;
 }
 
 export interface SendMessageReturn {