support for custom queries + presence update handler

README.md

@@ -27,6 +27,9 @@ Baileys is super easy to use:
     ``` javascript 
         client.handlers.onError = (error) => { /* called when there was an error */ } 
     ```
+    ``` javascript 
+        client.handlers.presenceUpdated = (id, presence) => { /* called when you recieve an update on someone's presence */ } 
+    ```
     ``` javascript 
         client.handlers.onDisconnect = () => { /* called when internet gets disconnected */ } 
     ```
@@ -133,7 +136,7 @@ Baileys is super easy to use:
             }
         })
     ```
-    Of course, replace ``` [countrycode][some10digitnumber] ``` with an actual country code & number. ``` isOnWhatsApp ``` returns a promise.
+    Of course, replace ``` [countrycode][some10digitnumber] ``` with an actual country code & number.
 
 
 Do check out & run [example.js](example/example.js) to see example usage of all these functions.

WhatsAppWeb.Recv.js

@@ -140,6 +140,11 @@ module.exports = function(WhatsAppWeb) {
                         
                     }
                     return
+                case "Presence":
+                    if (this.handlers.presenceUpdated) {
+                        this.handlers.presenceUpdated(json[1].id, json[1].type)
+                    }
+                    return
                 default:
                     break
             }
@@ -155,6 +160,8 @@ module.exports = function(WhatsAppWeb) {
                         q.callback(json.status == 200, q.queryJSON[2])
                     } else if (q.queryJSON[1] === "mediaConn") {
                         q.callback(json.media_conn)
+                    } else {
+                        q.callback(json)
                     }
                     delete this.queryCallbacks[messageTag]
                 }

WhatsAppWeb.Send.js

@@ -37,6 +37,10 @@ module.exports = function(WhatsAppWeb) {
         ]
         this.sendBinary(json, [10, 128])
 	}
+	// check the presence status of a given jid
+	WhatsAppWeb.prototype.requestPresenceUpdate = function (jid) {
+		this.query(["action","presence","subscribe",jid])
+	}
 	// send a text message to someone, optionally you can provide a quoted message & the timestamp for the message
     WhatsAppWeb.prototype.sendTextMessage = function (id, txt, quoted=null, timestamp=null) {
 		let message

example/example.js

@@ -19,6 +19,10 @@ client.handlers.onConnected = () => {
         Despite the convenience, be careful with this file
     */
 }
+// called when someone's presence is updated
+client.handlers.presenceUpdated = (id, type) => {
+    console.log("presence of " + id + " is " + type)
+}
 // called when you have a pending unread message or recieve a new message
 client.handlers.onUnreadMessage = (m) => { 
     // console.log("recieved message: " + JSON.stringify(m)) // uncomment to see what the raw message looks like
@@ -58,6 +62,7 @@ client.handlers.onUnreadMessage = (m) => {
         }
     }, 4*1000) // send after 4 seconds
 }
+
 // called if an error occurs
 client.handlers.onError = (err) => console.log(err)
 client.handlers.onDisconnect = () => { /* internet got disconnected, save chats here or whatever; will reconnect automatically */ }