feat: send typing in chat (#87)

Co-authored-by: Pedro S. Lopez <pedroslopez@me.com>

example.js

@@ -168,6 +168,9 @@ client.on('message', async msg => {
     } else if (msg.body === '!archive') {
         const chat = await msg.getChat();
         chat.archive();
+    } else if (msg.body === '!typing') {
+        const chat = await msg.getChat();
+        chat.typing();        
     }
 });
 

src/structures/Chat.js

@@ -103,6 +103,16 @@ class Chat extends Base {
         return this.client.unarchiveChat(this.id._serialized);
     }
    
+    /**
+     * Start typing in chat. This will last for 25 seconds.
+     */
+    async sendTyping() {
+        return this.client.pupPage.evaluate(chatId => {
+            window.WWebJS.typing(chatId);
+            return true;
+        }, this.id._serialized);        
+    }
+    
 }
 
 module.exports = Chat;

src/util/Injected.js

@@ -255,6 +255,12 @@ exports.LoadUtils = () => {
         }
         return false;
     };
+
+    window.WWebJS.typing = async (chatId) => {
+        await window.Store.Wap.sendChatstateComposing(chatId);
+        return true;
+    };    
+    
 };
 
 exports.MarkAllRead = () => {