add location scanning + overview

lib/pages/locations.dart

@@ -1,14 +1,69 @@
 import 'package:cdb_ui/api.dart';
 import 'package:cdb_ui/pages/transaction.dart';
 import 'package:flutter/material.dart';
+import 'package:qr_bar_code_scanner_dialog/qr_bar_code_scanner_dialog.dart';
 
-class LocationsPage extends StatelessWidget {
+class LocationsPage extends StatefulWidget {
   const LocationsPage({super.key});
 
+  @override
+  State<LocationsPage> createState() => _LocationsPageState();
+}
+
+class _LocationsPageState extends State<LocationsPage> {
+  Map<String, Location>? locations;
+
+  @override
+  void initState() {
+    super.initState();
+    API().getLocations().then(
+      (value) {
+        setState(() {
+          locations = value;
+        });
+      },
+    );
+  }
+
   @override
   Widget build(BuildContext context) {
     // todo : add locations tree view
-    return const Scaffold();
+
+    if (locations == null) {
+      return const Scaffold(
+        body: CircularProgressIndicator(),
+      );
+    }
+
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text("Locations"),
+      ),
+      body: null,
+      floatingActionButton: FloatingActionButton(
+        onPressed: () {
+          // scan location code
+          QrBarCodeScannerDialog().getScannedQrBarCode(
+            context: context,
+            onCode: (code) {
+              // library is retarded
+              code = code!.replaceFirst("Code scanned = ", "");
+              if (!locations!.containsKey(code)) {
+                ScaffoldMessenger.of(context).showSnackBar(
+                  SnackBar(content: Text('The location $code does not exist.')),
+                );
+                return;
+              }
+
+              Navigator.of(context).push(MaterialPageRoute(
+                builder: (context) => LocationView(locations![code]!),
+              ));
+            },
+          );
+        },
+        child: const Icon(Icons.qr_code),
+      ),
+    );
   }
 }
 
@@ -34,7 +89,9 @@ class _LocationViewState extends State<LocationView> {
       appBar: AppBar(
         title: Text(widget.location.name),
       ),
-      body: Column(
+      body: Padding(
+        padding: EdgeInsets.symmetric(horizontal: 10.0),
+        child: Column(
           children: [
             Card(
               child: Column(
@@ -65,7 +122,8 @@ class _LocationViewState extends State<LocationView> {
                 ),
               ],
             ),
-          FutureBuilder(
+            Expanded(
+              child: FutureBuilder(
                 future: API().getTransactionsOfLocation(widget.location.id,
                     recursive: recursive),
                 builder: (context, snapshot) {
@@ -76,12 +134,15 @@ class _LocationViewState extends State<LocationView> {
                   var data = snapshot.data!;
 
                   return ListView(
-                  children:
+                      children: data
-                      data.map((x) => TransactionCard(x, refresh)).toList());
+                          .map((x) => TransactionCard(x, refresh))
+                          .toList());
                 },
+              ),
             )
           ],
         ),
+      ),
     );
   }
 }

pubspec.lock

@@ -180,18 +180,18 @@ packages:
     dependency: transitive
     description:
       name: leak_tracker
-      sha256: "7f0df31977cb2c0b88585095d168e689669a2cc9b97c309665e3386f3e9d341a"
+      sha256: "3f87a60e8c63aecc975dda1ceedbc8f24de75f09e4856ea27daf8958f2f0ce05"
       url: "https://pub.dev"
     source: hosted
-    version: "10.0.4"
+    version: "10.0.5"
   leak_tracker_flutter_testing:
     dependency: transitive
     description:
       name: leak_tracker_flutter_testing
-      sha256: "06e98f569d004c1315b991ded39924b21af84cf14cc94791b8aea337d25b57f8"
+      sha256: "932549fb305594d82d7183ecd9fa93463e9914e1b67cacc34bc40906594a1806"
       url: "https://pub.dev"
     source: hosted
-    version: "3.0.3"
+    version: "3.0.5"
   leak_tracker_testing:
     dependency: transitive
     description:
@@ -220,18 +220,18 @@ packages:
     dependency: transitive
     description:
       name: material_color_utilities
-      sha256: "0e0a020085b65b6083975e499759762399b4475f766c21668c4ecca34ea74e5a"
+      sha256: f7142bb1154231d7ea5f96bc7bde4bda2a0945d2806bb11670e30b850d56bdec
       url: "https://pub.dev"
     source: hosted
-    version: "0.8.0"
+    version: "0.11.1"
   meta:
     dependency: transitive
     description:
       name: meta
-      sha256: "7687075e408b093f36e6bbf6c91878cc0d4cd10f409506f7bc996f68220b9136"
+      sha256: bdb68674043280c3428e9ec998512fb681678676b3c54e773629ffe74419f8c7
       url: "https://pub.dev"
     source: hosted
-    version: "1.12.0"
+    version: "1.15.0"
   path:
     dependency: transitive
     description:
@@ -425,10 +425,10 @@ packages:
     dependency: transitive
     description:
       name: test_api
-      sha256: "9955ae474176f7ac8ee4e989dadfb411a58c30415bcfb648fa04b2b8a03afa7f"
+      sha256: "5b8a98dafc4d5c4c9c72d8b31ab2b23fc13422348d2997120294d3bac86b4ddb"
       url: "https://pub.dev"
     source: hosted
-    version: "0.7.0"
+    version: "0.7.2"
   typed_data:
     dependency: transitive
     description:
@@ -457,10 +457,10 @@ packages:
     dependency: transitive
     description:
       name: vm_service
-      sha256: "3923c89304b715fb1eb6423f017651664a03bf5f4b29983627c4da791f74a4ec"
+      sha256: "5c5f338a667b4c644744b661f309fb8080bb94b18a7e91ef1dbd343bed00ed6d"
       url: "https://pub.dev"
     source: hosted
-    version: "14.2.1"
+    version: "14.2.5"
   web:
     dependency: transitive
     description: