Add project files.

MyOffice.SPA/src/app/core/guard/auth.guard.ts

@@ -0,0 +1,24 @@
+import { Injectable } from '@angular/core';
+import { Router, CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot } from '@angular/router';
+
+import { AuthService } from '../service/auth.service';
+
+@Injectable({
+	providedIn: 'root',
+})
+export class AuthGuard implements CanActivate {
+	constructor(
+		private authService: AuthService,
+		private router: Router
+	) {
+	}
+
+	// eslint-disable-next-line @typescript-eslint/no-unused-vars
+	canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot) {
+		if (this.authService.isAuthenticated) {
+			return true;
+		}
+		this.router.navigate(['/authentication/signin'], { queryParams: { r: encodeURIComponent(state.url) } });
+		return false;
+	}
+}