replace alerts und confirms with modals #15

src/app/services/popover.service.ts

@@ -0,0 +1,34 @@
+// popover.service.ts
+import { Injectable } from '@angular/core';
+import { Subject } from 'rxjs';
+
+@Injectable({ providedIn: 'root' })
+export class PopoverService {
+  private showPopoverSource = new Subject<{
+    title: string;
+    message: string;
+    showInput: boolean;
+    inputValue: string;
+    confirmText: string;
+    onConfirm: () => void;
+    onCancel?: () => void;
+  }>();
+
+  popoverState$ = this.showPopoverSource.asObservable();
+
+  show(options: { title: string; message: string; confirmText?: string; onConfirm?: (inputValue?: string) => void; onCancel?: () => void }) {
+    this.showPopoverSource.next({
+      showInput: false,
+      inputValue: null,
+      confirmText: 'Ok',
+      onConfirm: (inputValue?: string) => {},
+      ...options,
+    });
+  }
+  showWithInput(options: { title: string; message: string; confirmText: string; inputValue: string; onConfirm: (inputValue?: string) => void; onCancel?: () => void }) {
+    this.showPopoverSource.next({
+      showInput: true,
+      ...options,
+    });
+  }
+}