Kat 50 add database and MyHomePage2.dart

rescueapp/lib/bloc_patient/patient_bloc.dart

+
+
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:rescueapp/events-patient/add_patient.dart';
+import 'package:rescueapp/events-patient/delete_patient.dart';
+import 'package:rescueapp/events-patient/patient_event.dart';
+import 'package:rescueapp/events-patient/set_patient.dart';
+import 'package:rescueapp/events-patient/update_patient.dart';
+import 'package:rescueapp/model-patient/patient.dart';
+
+class PatientBloc extends Bloc<PatientEvent, List<Patient>> {
+  @override
+  List<Patient> get initialState => List<Patient>();
+// events wird definiert durch PatientEvent.
+  // mapEventToState wird aufgerufen um das bestimmte event mit einem bestimmten status zu definieren
+  @override
+  Stream<List<Patient>> mapEventToState(PatientEvent event) async* {
+    if (event is SetPatient) {
+      yield event.patientList;
+    } else if (event is AddPatient) {
+      List<Patient> newState = List.from(state);
+      if (event.newPatient != null) {
+        newState.add(event.newPatient);
+      }
+      yield newState;
+    } else if (event is DeletePatient) {
+      List<Patient> newState = List.from(state);
+      newState.removeAt(event.patientIndex);
+      yield newState;
+    } else if (event is UpdatePatient) {
+      List<Patient> newState = List.from(state);
+      newState[event.patientIndex] = event.newPatient;
+      yield newState;
+    }
+  }
+}
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