fix async nav + refactor

lib/api.dart

@@ -253,9 +253,9 @@ class API {
     return resp.map((x) => MinItem(x)).toList();
   }
 
-  Future<void> moveTransaction(String id, String new_location) async {
+  Future<void> moveTransaction(String id, String newLocation) async {
     jsonDecode(await postRequest(
-        "$instance/transaction/$id/move", {"to": new_location}));
+        "$instance/transaction/$id/move", {"to": newLocation}));
   }
 
   Future<Location> getLocation(String id) async {
@@ -360,11 +360,11 @@ class ConsumeInfo {
 
 class ItemVariantStat {
   late int amount;
-  late double total_price;
+  late double totalPrice;
 
   ItemVariantStat(Map<String, dynamic> json) {
     amount = json["amount"];
-    total_price = json["total_price"];
+    totalPrice = json["total_price"];
   }
 }
 
@@ -388,11 +388,11 @@ class Location {
     conditions = json["conditions"] != null ? (json["conditions"]) : null;
   }
 
-  String full_name_path(Map<String, Location> locations) {
+  String fullNamePath(Map<String, Location> locations) {
     var name = this.name;
 
     if (parent != null) {
-      name = "${locations[parent!]!.full_name_path(locations)} / $name";
+      name = "${locations[parent!]!.fullNamePath(locations)} / $name";
     }
 
     return name;
@@ -408,10 +408,10 @@ class LocationCondition {
 }
 
 class MinItem {
-  late String item_variant;
+  late String itemVariant;
   late int need;
   MinItem(Map<String, dynamic> json) {
-    item_variant = json["item_variant"];
+    itemVariant = json["item_variant"];
     need = json["need"];
   }
 }

lib/main.dart

@@ -21,7 +21,7 @@ class MyApp extends StatelessWidget {
             seedColor: Colors.deepPurple, brightness: Brightness.dark),
         useMaterial3: true,
       ),
-      home: API().isInit() ? MyHomePage() : SetupPage(),
+      home: API().isInit() ? const MyHomePage() : const SetupPage(),
     );
   }
 }
@@ -41,7 +41,7 @@ class StatsPage extends StatelessWidget {
         future: _fetchData(),
         builder: (context, snapshot) {
           if (!snapshot.hasData) {
-            return CircularProgressIndicator();
+            return const CircularProgressIndicator();
           }
 
           var data = snapshot.data!;
@@ -50,15 +50,17 @@ class StatsPage extends StatelessWidget {
 
           return Column(
             children: [
-              if (min.isNotEmpty) ListTile(title: Text("Items under Minimum")),
+              if (min.isNotEmpty)
+                const ListTile(title: Text("Items under Minimum")),
               ...min.map((item) {
                 return ListTile(
                   title: Text(
-                      "Item ${item.item_variant} under minimum. Needs ${item.need} more."),
+                      "Item ${item.itemVariant} under minimum. Needs ${item.need} more."),
                 );
               }).toList(),
 
-              if (expired.isNotEmpty) ListTile(title: Text("Expired Items")),
+              if (expired.isNotEmpty)
+                const ListTile(title: Text("Expired Items")),
 
               // Mapping expired list to widgets
               ...expired.map((item) {
@@ -80,7 +82,7 @@ class FlowsPage extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     // todo : add locations tree view
-    return Scaffold();
+    return const Scaffold();
   }
 }
 
@@ -90,7 +92,7 @@ class LocationsPage extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     // todo : add locations tree view
-    return Scaffold();
+    return const Scaffold();
   }
 }
 
@@ -133,7 +135,12 @@ class MyHomePage extends StatefulWidget {
 class _MyHomePageState extends State<MyHomePage> {
   int pageIndex = 0;
 
-  List<Widget> pages = [StatsPage(), ItemsPage(), FlowsPage(), LocationsPage()];
+  List<Widget> pages = [
+    const StatsPage(),
+    const ItemsPage(),
+    const FlowsPage(),
+    const LocationsPage()
+  ];
 
   @override
   Widget build(BuildContext context) {
@@ -169,11 +176,9 @@ class ItemCard extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return InkWell(
-      onTap: () async {
-        var itemInfo = await API().getItem(item);
-
-        Navigator.push(context,
-            MaterialPageRoute(builder: (context) => ItemView(item: itemInfo)));
+      onTap: () {
+        API().getItem(item).then((itemInfo) => Navigator.push(context,
+            MaterialPageRoute(builder: (context) => ItemView(item: itemInfo))));
       },
       child: Row(children: [
         /*Image.network(

lib/pages/consume.dart

@@ -24,18 +24,19 @@ class _ConsumePageState extends State<ConsumePage> {
     super.initState();
   }
 
-  Future<void> _consume() async {
+  void _consume() {
     if (_formKey.currentState!.validate()) {
       _formKey.currentState!.save();
 
-      await API()
-          .consumeItem(widget.transaction, _selectedDestination, "${_price} €");
-
+      API()
+          .consumeItem(widget.transaction, _selectedDestination, "$_price €")
+          .then((_) {
         ScaffoldMessenger.of(context).showSnackBar(
           const SnackBar(content: Text('Item consumed successfully!')),
         );
         Navigator.of(context).pop();
         widget.refresh();
+      });
     }
   }
 

lib/pages/itemview.dart

@@ -75,7 +75,7 @@ class _ItemViewState extends State<ItemView> {
                             children: [
                               Text("Amount: ${stat.amount}"),
                               Text(
-                                  "Total Cost: ${stat.total_price.toStringAsFixed(2)}")
+                                  "Total Cost: ${stat.totalPrice.toStringAsFixed(2)}")
                             ],
                           );
                         },
@@ -125,7 +125,7 @@ class TransactionCard extends StatelessWidget {
       onTap: () {
         Navigator.of(context).push(MaterialPageRoute(
           builder: (context) {
-            return ConsumePage(t.uuid, t.item, t.variant, this.refresh);
+            return ConsumePage(t.uuid, t.item, t.variant, refresh);
           },
         ));
       },

lib/pages/setup.dart

@@ -6,7 +6,7 @@ class SetupPage extends StatefulWidget {
   const SetupPage({super.key});
 
   @override
-  _SetupPageState createState() => _SetupPageState();
+  State<SetupPage> createState() => _SetupPageState();
 }
 
 class _SetupPageState extends State<SetupPage> {

lib/pages/supply.dart

@@ -25,18 +25,20 @@ class _SupplyPageState extends State<SupplyPage> {
     variant = widget.item.variants.keys.first;
   }
 
-  Future<void> _supply() async {
+  void _supply() {
     if (_formKey.currentState!.validate()) {
       _formKey.currentState!.save();
 
-      await API().supplyItem(widget.item.name, variant, "${_price} €",
-          _selectedOrigin, _selectedLocation);
-
+      API()
+          .supplyItem(widget.item.name, variant, "$_price €", _selectedOrigin,
+              _selectedLocation)
+          .then((_) {
         ScaffoldMessenger.of(context).showSnackBar(
           const SnackBar(content: Text('Item added successfully!')),
         );
         Navigator.of(context).pop();
         widget.refresh();
+      });
     }
   }
 
@@ -165,8 +167,8 @@ class _SupplyPageState extends State<SupplyPage> {
                               .map<DropdownMenuItem<String>>((id) {
                             return DropdownMenuItem<String>(
                               value: id,
-                              child: Text(
-                                  locations[id]!.full_name_path(locations)),
+                              child:
+                                  Text(locations[id]!.fullNamePath(locations)),
                             );
                           }).toList(),
                           onSaved: (value) {