update

lib/api.dart

@@ -2,6 +2,8 @@ import 'dart:convert';
 import 'package:http/http.dart' as http;
 import 'package:shared_preferences/shared_preferences.dart';
 
+// todo : api errors
+
 class API {
   late SharedPreferences pref;
   static final API _instance = API._internal();

lib/pages/flow.dart

@@ -4,10 +4,24 @@ import 'package:flutter/material.dart';
 class FlowsPage extends StatelessWidget {
   const FlowsPage({super.key});
 
+  Widget listAllFlowInfos(
+      BuildContext context, Map<String, API.FlowInfo> infos) {
+    return ListView(
+        children: infos.values.map((x) {
+      return ListTile(
+        title: Text(x.name),
+        onTap: () {
+          Navigator.of(context).push(MaterialPageRoute(
+            builder: (context) => FlowPage(x),
+          ));
+        },
+      );
+    }).toList());
+  }
+
   @override
   Widget build(BuildContext context) {
-    // todo : flows by item produced
-    // todo : list all flow kinds
+    // todo : flows (info) by item produced
     // todo : list currently active
     // todo : flows by item needed (show only avail)
     return Scaffold(
@@ -21,17 +35,7 @@ class FlowsPage extends StatelessWidget {
 
               var data = snap.data!;
 
-              return ListView(
-                  children: data.values.map((x) {
-                return ListTile(
-                  title: Text(x.name),
-                  onTap: () {
-                    Navigator.of(context).push(MaterialPageRoute(
-                      builder: (context) => FlowPage(x),
-                    ));
-                  },
-                );
-              }).toList());
+              return listAllFlowInfos(context, data);
             }));
   }
 }

lib/pages/items.dart

@@ -1,6 +1,8 @@
 import 'package:cdb_ui/api.dart';
 import 'package:cdb_ui/pages/itemview.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 ItemsPage extends StatelessWidget {
   const ItemsPage({super.key});
@@ -25,6 +27,25 @@ class ItemsPage extends StatelessWidget {
               return ItemTile(x);
             }).toList());
           }),
+      floatingActionButton: FloatingActionButton(
+        onPressed: () {
+          // scan transaction code
+          QrBarCodeScannerDialog().getScannedQrBarCode(
+            context: context,
+            onCode: (code) {
+              // library is retarded
+              code = code!.replaceFirst("Code scanned = ", "");
+
+              API().getTransaction(code).then((t) {
+                Navigator.of(context).push(MaterialPageRoute(
+                  builder: (context) => TransactionPage(t),
+                ));
+              });
+            },
+          );
+        },
+        child: const Icon(Icons.qr_code),
+      ),
     );
   }
 }