Issue #195 : When uploading, warn when the user quits the page (#222)

* issue #195

* fixing missing provider definition

* fix styling issue

* fix styling issue

* removed unecessary code

* using angular confirmService instead of window.confirm

* gitignore unecessary folders

* style fixes

* using a generic canDeactivateGuard

* fixing lint style

1 files changed, 25 insertions, 0 deletions

diff --git a/client/src/app/shared/can-deactivate-guard.service.ts b/client/src/app/shared/can-deactivate-guard.service.ts
new file mode 100644
index 000000000..4239df737
--- /dev/null
+++ b/client/src/app/shared/can-deactivate-guard.service.ts
@@ -0,0 +1,25 @@
+import { Injectable } from '@angular/core'
+import { CanDeactivate, ActivatedRouteSnapshot, RouterStateSnapshot } from '@angular/router'
+import { Observable } from 'rxjs/Observable'
+import { ConfirmService } from '../core'
+
+export interface CanComponentDeactivate {
+  canDeactivate: () => Observable<boolean> | boolean
+}
+
+@Injectable()
+export class CanDeactivateGuard implements CanDeactivate<CanComponentDeactivate> {
+  constructor (private confirmService: ConfirmService) { }
+
+  canDeactivate (component: CanComponentDeactivate,
+    currentRoute: ActivatedRouteSnapshot,
+    currentState: RouterStateSnapshot,
+    nextState: RouterStateSnapshot
+  ): Observable<boolean> | boolean {
+    return component.canDeactivate() || this.confirmService.confirm(
+      'All unsaved data will be lost, are you sure you want to leave ?',
+      'Unsaved Data'
+    )
+  }
+
+}