added last downtime log (closes #55)

added uptime statistics (closes #56)
added german translations (closes #57)

src/app/_pipe/dayjs.pipe.spec.ts

@@ -0,0 +1,8 @@
+import { DayjsPipe } from './dayjs.pipe';
+
+describe('DayjsPipe', () => {
+  it('create an instance', () => {
+    const pipe = new DayjsPipe();
+    expect(pipe).toBeTruthy();
+  });
+});

src/app/_pipe/dayjs.pipe.ts

@@ -0,0 +1,36 @@
+import { Pipe, PipeTransform } from '@angular/core';
+import * as dayjs from 'dayjs';
+import * as utc from 'dayjs/plugin/utc';
+import * as relativeTime from 'dayjs/plugin/relativeTime';
+import * as localizedFormat from 'dayjs/plugin/localizedFormat';
+import {TranslateService} from '@ngx-translate/core';
+import 'dayjs/locale/de';
+
+dayjs.extend(utc);
+dayjs.extend(relativeTime);
+dayjs.extend(localizedFormat);
+
+@Pipe({
+  name: 'dayjs',
+  pure: false
+})
+export class DayjsPipe implements PipeTransform {
+  constructor(private translate: TranslateService) {
+  }
+
+  transform(value: string | Date, method: string, ...args: any[]): string {
+    const date = dayjs.utc(value);
+    switch (method) {
+      case 'to':
+        const to = args[0] ? dayjs.utc(args[0]) : dayjs.utc();
+        const suffix = args.length > 1 && args[1] === true;
+        return date.locale(this.translate.currentLang).to(to, !suffix);
+      case 'from':
+        const from = args[0] ? dayjs.utc(args[0]) : dayjs.utc();
+        return date.locale(this.translate.currentLang).from(from);
+      case 'format':
+        return date.local().locale(this.translate.currentLang).format(args[0]);
+    }
+    throw new Error('please pass a method to use!');
+  }
+}