manager eval

Manager.js

@@ -1,4 +1,5 @@
 const { EventEmitter } = require('events'); 
+const { inspect } = require('util');
 
 const ShardManager = require('./middleware/ShardManager.js');
 const Logger = require('./middleware/logger/Logger.js');
@@ -13,6 +14,7 @@ class Manager extends EventEmitter {
         this.logger = new Logger(this);
 
         this._built = false;
+        this.readyAt = null;
 
         this.shardManager.on('message', this._handleMessage.bind(this));
         // this.on('built', () => {
@@ -23,8 +25,9 @@ class Manager extends EventEmitter {
 
     _handleMessage(shard, message) {
 
-        if(message._logger) return this.logger._handleMessage(shard, message);
-        if(message._webhook) return undefined; //todo
+        if (message._mEval) return this.eval(shard, message);
+        if (message._logger) return this.logger._handleMessage(shard, message);
+        if (message._webhook) return undefined; //todo
     }
 
     async build() {
@@ -33,9 +36,46 @@ class Manager extends EventEmitter {
 
         this._built = true;
         this.emit('built');
+        this.readyAt = Date.now();
 
     }
 
+    /**
+     *
+     *
+     * @param {*} shard The shard from which the eval came and to which it will be returned
+     * @param {*} script The script to be executed
+     * @memberof Manager
+     * @private
+     */
+    async eval(shard, { script }) {
+
+        this.logger.write('info', `Incoming manager eval from shard ${shard.id}:\n${script}`);
+        let result = null,
+            error = null;
+        
+        try {
+            // eslint-disable-next-line no-eval
+            result = eval(script);
+            if (result instanceof Promise) result = await result;
+            //if(typeof result !== 'string') result = inspect(result);
+        } catch (err) {
+            error = err.stack || err;
+        }
+
+        return shard.send({
+            _evalResult: true,
+            script,
+            result,
+            error
+        });
+
+    }
+
+    get uptime() {
+        return this.readyAt !== null ? Date.now() - this.readyAt : 0;
+    }
+
 }
 
 module.exports = Manager;