Update:Remove node-cron dependency

server/libs/nodeCron/task.js

@@ -0,0 +1,34 @@
+'use strict';
+
+const EventEmitter = require('events');
+
+class Task extends EventEmitter{
+    constructor(execution){
+        super();
+        if(typeof execution !== 'function') {
+            throw 'execution must be a function';
+        }
+        this._execution = execution;
+    }
+
+    execute(now) {
+        let exec;
+        try {
+            exec = this._execution(now);
+        } catch (error) {
+            return this.emit('task-failed', error);
+        }
+        
+        if (exec instanceof Promise) {
+            return exec
+                .then(() => this.emit('task-finished'))
+                .catch((error) => this.emit('task-failed', error));
+        } else {
+            this.emit('task-finished');
+            return exec;
+        }
+    }
+}
+
+module.exports = Task;
+