add check on expirey date

Frontend/patient_manager/lib/components/builders/buildPatientQueueList.dart

@@ -89,7 +89,13 @@ class _BuildPatientsListState extends State<BuildPatientQueueList> {
         ),
       ),
       onTap: () {
-        if (widget.patientQueue[index].access != "pending") {
+        var todayDate = DateTime.now();
+        var revokeDate = DateTime.parse(widget.patientQueue[index].revoke_date);
+        print(
+            "Todays: $todayDate\nRevoke Date: $revokeDate\nHas revoke date passed: ${revokeDate.isBefore(todayDate)}");
+        if (revokeDate.isBefore(todayDate)) {
+          expiredAccessWarning();
+        } else if (widget.patientQueue[index].access != "pending") {
           Patient selectedPatient;
           fetchPatients(widget.patientQueue[index].app_id).then(
             (result) {
@@ -121,6 +127,15 @@ class _BuildPatientsListState extends State<BuildPatientQueueList> {
     );
   }
 
+  void expiredAccessWarning() {
+    showDialog(
+      context: context,
+      builder: (context) {
+        return const MIHWarningMessage(warningType: "Expired Access");
+      },
+    );
+  }
+
   @override
   Widget build(BuildContext context) {
     return ListView.separated(