feat: Get message delivery information (close #418)

index.d.ts

@@ -433,6 +433,15 @@ declare namespace WAWebJS {
         UNPAIRED_IDLE = 'UNPAIRED_IDLE',
     }
 
+    export type MessageInfo = {
+        delivery: Array<{id: ContactId, t: number}>,
+        deliveryRemaining: number,
+        played: Array<{id: ContactId, t: number}>,
+        playedRemaining: number,
+        read: Array<{id: ContactId, t: number}>,
+        readRemaining: number
+    }
+
     /**
      * Represents a Message on WhatsApp
      * 
@@ -530,9 +539,11 @@ declare namespace WAWebJS {
          */
         forward: (chat: Chat | string) => Promise<void>,
         /** Star this message */
-        star: () => Promise<void>
+        star: () => Promise<void>,
         /** Unstar this message */
-        unstar: () => Promise<void>
+        unstar: () => Promise<void>,
+        /** Get information about message delivery statuso */
+        getInfo: () => Promise<MessageInfo | null>
     }
 
     /** ID that represents a message */

src/structures/Message.js

@@ -310,6 +310,36 @@ class Message extends Base {
             }
         }, this.id._serialized);
     }
+
+    /**
+     * Message Info
+     * @typedef {Object} MessageInfo
+     * @property {Array<{id: ContactId, t: number}>} delivery Contacts to which the message has been delivered to
+     * @property {number} deliveryRemaining Amount of people to whom the message has not been delivered to
+     * @property {Array<{id: ContactId, t: number}>} played Contacts who have listened to the voice message
+     * @property {number} playedRemaining Amount of people who have not listened to the message
+     * @property {Array<{id: ContactId, t: number}>} read Contacts who have read the message
+     * @property {number} readRemaining Amount of people who have not read the message
+     */
+
+    /**
+     * Get information about message delivery status. May return null if the message does not exist or is not sent by you.
+     * @returns {Promise<?MessageInfo>}
+     */
+    async getInfo() {
+        const info = await this.client.pupPage.evaluate(async (msgId) => {
+            const msg = window.Store.Msg.get(msgId);
+            if(!msg) return null;
+            
+            return await window.Store.Wap.queryMsgInfo(msg.id);
+        }, this.id._serialized);
+
+        if(info.status) {
+            return null;
+        }
+
+        return info;
+    }
 }
 
 module.exports = Message;