fix caching on add medicines

lib/blocs/caches/manufacturerlist/functions/cache_getmanufacturerlist.dart

@@ -0,0 +1,14 @@
+import 'package:flutter/widgets.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:pharmacy_mobile/blocs/caches/manufacturerlist/manufacturerlist_cache_bloc.dart';
+import 'package:pharmacy_mobile/blocs/caches/manufacturerlist/manufacturerlist_cache_event.dart';
+
+Future<List> cacheGetManufacturerList(BuildContext context) async {
+  try {
+    final manufacturerListCache = context.read<ManufacturerListBloc>();
+    manufacturerListCache.add(ManufacturerListCacheGet());
+    return manufacturerListCache.state.value;
+  } catch (e) {
+    return [];
+  }
+}

lib/blocs/caches/manufacturerlist/functions/cache_setmanufacturerlist.dart

@@ -0,0 +1,14 @@
+import 'package:flutter/widgets.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:pharmacy_mobile/blocs/caches/manufacturerlist/manufacturerlist_cache_bloc.dart';
+import 'package:pharmacy_mobile/blocs/caches/manufacturerlist/manufacturerlist_cache_event.dart';
+
+Future<bool> cacheSetManufacturerList(BuildContext context, List value) async {
+  try {
+    final manufacturerListCache = context.read<ManufacturerListBloc>();
+    manufacturerListCache.add(ManufacturerListCacheSet(value));
+    return true;
+  } catch (e) {
+    return false;
+  }
+}

lib/blocs/caches/manufacturerlist/manufacturerlist_cache_bloc.dart

@@ -0,0 +1,14 @@
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:pharmacy_mobile/blocs/caches/manufacturerlist/manufacturerlist_cache_event.dart';
+import 'package:pharmacy_mobile/blocs/caches/manufacturerlist/manufacturerlist_cache_state.dart';
+
+class ManufacturerListBloc extends Bloc<ManufacturerListCacheEvent, ManufacturerListCacheState> {
+  ManufacturerListBloc() : super(ManufacturerListCacheState([])) {
+    on<ManufacturerListCacheSet>((event, emit) {
+      emit(ManufacturerListCacheState(event.value));
+    });
+    on<ManufacturerListCacheGet>((event, emit) {
+      emit(state);
+    });
+  }
+}

lib/blocs/caches/manufacturerlist/manufacturerlist_cache_event.dart

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+abstract class ManufacturerListCacheEvent {}
+
+class ManufacturerListCacheSet extends ManufacturerListCacheEvent {
+  final List value;
+  ManufacturerListCacheSet(this.value);
+}
+
+class ManufacturerListCacheGet extends ManufacturerListCacheEvent {}

lib/blocs/caches/manufacturerlist/manufacturerlist_cache_state.dart

@@ -0,0 +1,5 @@
+class ManufacturerListCacheState {
+  final List value;
+
+  ManufacturerListCacheState(this.value);
+}