#931: create alert dialog component (dialog with only a close button)

frontend/src/app/shared/dialog/alert-dialog/alert-dialog.component.html

@@ -0,0 +1,17 @@
+<section mat-dialog-title>
+  <app-dialog-header [dialogTitle]="this.data.dialogTitle"></app-dialog-header>
+</section>
+
+<mat-dialog-content>
+  @if (data.dialogText) {
+    <div class="mb-3">
+      <span class="dialog-text">{{ this.data.dialogText }}</span>
+    </div>
+  }
+</mat-dialog-content>
+
+<mat-dialog-actions class="m-0">
+  <button color="primary" [attr.data-testId]="'alertDialog-confirm'" (click)="closeDialog()" mat-flat-button>
+    Schliessen
+  </button>
+</mat-dialog-actions>

frontend/src/app/shared/dialog/alert-dialog/alert-dialog.component.ts

@@ -0,0 +1,23 @@
+import { Component, Inject } from '@angular/core';
+import { MAT_DIALOG_DATA, MatDialogRef } from '@angular/material/dialog';
+
+export type AlertDialogData = {
+  dialogTitle: string;
+  dialogText?: string;
+};
+
+@Component({
+  selector: 'app-alert-dialog',
+  templateUrl: './alert-dialog.component.html',
+  styleUrl: './alert-dialog.component.scss',
+})
+export class AlertDialogComponent {
+  constructor(
+    @Inject(MAT_DIALOG_DATA) public data: AlertDialogData,
+    private dialogRef: MatDialogRef<AlertDialogComponent>,
+  ) {}
+
+  closeDialog() {
+    this.dialogRef.close();
+  }
+}

frontend/src/app/shared/shared.module.ts

@@ -26,6 +26,7 @@ import { RouterOutlet } from '@angular/router';
 import { SpinnerComponent } from './custom/spinner/spinner.component';
 import { MatProgressSpinnerModule } from '@angular/material/progress-spinner';
 import { CancelDialogComponent } from './dialog/cancel-dialog/cancel-dialog.component';
+import { AlertDialogComponent } from './dialog/alert-dialog/alert-dialog.component';
 
 @NgModule({
   declarations: [
@@ -42,6 +43,7 @@ import { CancelDialogComponent } from './dialog/cancel-dialog/cancel-dialog.comp
     SidepanelComponent,
     SpinnerComponent,
     CancelDialogComponent,
+    AlertDialogComponent,
   ],
   imports: [
     CommonModule,