fix(core): update

ts/smarttime.classes.interval.ts

@@ -0,0 +1,40 @@
+import * as plugins from './smarttime.plugins';
+
+export class Interval {
+  public status: 'started' | 'stopped' | 'initial' = 'initial';
+  private statusAuthorization: any = null;
+  
+  public intervalMilliseconds: number;
+  public intervalJobs: Array<() => any> = [];
+  constructor(intervalMillisencondsArg: number) {
+    this.intervalMilliseconds = intervalMillisencondsArg;
+  }
+
+  public start() {
+    this.status = 'started';
+    const statusAuth = new Date();
+    this.statusAuthorization = statusAuth;
+    const runInterval = async () => {
+      while (this.status === 'started' && this.statusAuthorization === statusAuth) {
+        await plugins.smartdelay.delayFor(this.intervalMilliseconds);
+        this.executeIntervalJobs();
+      }
+    };
+    runInterval();
+  }
+
+  public stop () {
+    this.status = 'stopped';
+    this.statusAuthorization = null;
+  }
+
+  public addIntervalJob(funcArg: () => any) {
+    this.intervalJobs.push(funcArg);
+  }
+
+  private executeIntervalJobs () {
+    for (const funcArg of this.intervalJobs) {
+      funcArg();
+    }
+  }
+}