added sendRequestAsync which returns a promise when sending requests

examples/6_async_requests.js

@@ -0,0 +1,35 @@
+const RustPlus = require('@liamcottle/rustplus.js');
+var rustplus = new RustPlus('ip', 'port', 'playerId', 'playerToken');
+
+// wait until connected before sending commands
+rustplus.on('connected', () => {
+
+    /**
+     * sendRequestAsync will return a promise for your request.
+     * you can optionally pass in a second parameter for the timeout in milliseconds
+     * - AppResponse packets will be sent to `then` on success.
+     * - AppError packets and Timeout Errors will be sent to `catch`.
+     */
+    rustplus.sendRequestAsync({
+        getInfo: {}, // get server info with a timeout of 2 seconds
+    }, 2000).then((response) => {
+
+        // AppResponse
+        console.log(response);
+
+    }).catch((error) => {
+
+        // AppError or Error('Timeout');
+        console.log(error);
+
+    }).finally(() => {
+
+        // disconnect so our script is finished
+        rustplus.disconnect();
+
+    });
+
+});
+
+// connect to rust server
+rustplus.connect();

rustplus.js

@@ -150,6 +150,42 @@ class RustPlus extends EventEmitter {
 
     }
 
+    /**
+     * Send a Request to the Rust Server and return a Promise
+     * @param data this should contain valid data for the AppRequest packet defined in the rustplus.proto schema file
+     * @param timeoutMilliseconds milliseconds before the promise will be rejected. Defaults to 10 seconds.
+     */
+    sendRequestAsync(data, timeoutMilliseconds = 10000) {
+        return new Promise((resolve, reject) => {
+
+            // reject promise after timeout
+            var timeout = setTimeout(() => {
+                reject(new Error('Timeout reached while waiting for response'));
+            }, timeoutMilliseconds);
+
+            // send request
+            this.sendRequest(data, (message) => {
+
+                // cancel timeout
+                clearTimeout(timeout);
+
+                if(message.response.error){
+
+                    // reject promise if server returns an AppError for this request
+                    reject(message.response.error);
+
+                } else {
+
+                    // request was successful, resolve with message.response
+                    resolve(message.response);
+
+                }
+
+            });
+
+        });
+    }
+
     /**
      * Send a Request to the Rust Server to set the Entity Value.
      * @param entityId the entity id to set the value for