Add popup confirm before deleting node (#28)

src/app/pages/editor/editor.page.ts

@@ -1,7 +1,7 @@
 import {Component, HostListener, Input, OnInit} from '@angular/core';
 import HostRecord from '../../structures/HostRecord';
 import {ActivatedRoute, Router} from '@angular/router';
-import {LoadingController, PopoverController} from '@ionic/angular';
+import {AlertController, LoadingController, PopoverController} from '@ionic/angular';
 import {NodePickerComponent} from '../../components/editor/node-picker/node-picker.component';
 import {HostOptionsComponent} from '../../components/editor/host-options/host-options.component';
 import {EditorService} from '../../service/editor.service';
@@ -21,6 +21,7 @@ export class EditorPage implements OnInit {
     protected router: Router,
     protected loader: LoadingController,
     protected popover: PopoverController,
+    protected alerts: AlertController,
     public readonly editorService: EditorService,
   ) {
     this.route.params.subscribe(params => {
@@ -63,7 +64,23 @@ export class EditorPage implements OnInit {
     popover.onDidDismiss().then(result => {
       const { event: dismissEvent , value } = result.data;
       if ( value === 'delete_node' ) {
-        this.editorService.deleteNode(node.UUID);
+        this.alerts.create({
+          header: 'Delete node?',
+          message: 'Are you sure you want to delete this node? Its contents will be unrecoverable.',
+          buttons: [
+            {
+              text: 'Keep It',
+              role: 'cancel',
+            },
+            {
+              text: 'Delete It',
+              role: 'ok',
+              handler: () => {
+                this.editorService.deleteNode(node.UUID);
+              }
+            }
+          ],
+        }).then(alert => alert.present());
       } else if ( value === 'move_up' ) {
         this.editorService.moveNode(node, 'up');
       } else if ( value === 'move_down' ) {