api cache

lib/api.dart

@@ -4,12 +4,16 @@ import 'package:http/http.dart' as http;
 import 'package:shared_preferences/shared_preferences.dart';
 
 // todo : api errors
-// todo : api caching
 
 class API {
   late SharedPreferences pref;
   static final API _instance = API._internal();
 
+  // cache
+  List<Item>? items;
+  Map<String, Location>? locations;
+  Map<String, FlowInfo>? flowInfos;
+
   factory API() {
     return _instance;
   }
@@ -57,9 +61,14 @@ class API {
 
   // /items
   Future<List<Item>> getItems() async {
+    if (items != null) {
+      return items!;
+    }
+
     var resp = jsonDecode(await getRequest("$instance/items"));
     var lst = resp["items"] as List<dynamic>;
-    return lst.map((x) => Item(x)).toList();
+    items = lst.map((x) => Item(x)).toList();
+    return items!;
   }
 
   Future<GlobalItemStat> getGlobalItemStat() async {
@@ -82,12 +91,21 @@ class API {
   }
 
   Future<Map<String, Location>> getLocations() async {
+    if (locations != null) {
+      return locations!;
+    }
+
     var resp = jsonDecode(await getRequest("$instance/locations"))
         as Map<String, dynamic>;
-    return resp.map((key, value) => MapEntry(key, Location(value)));
+    locations = resp.map((key, value) => MapEntry(key, Location(value)));
+    return locations!;
   }
 
   Future<Item> getItem(String item) async {
+    if (items != null) {
+      return items!.firstWhere((x) => x.id == item);
+    }
+
     return Item(jsonDecode(await getRequest("$instance/item/$item")));
   }
 
@@ -219,14 +237,23 @@ class API {
 
   // /flows
   Future<Map<String, FlowInfo>> getFlows() async {
+    if (flowInfos != null) {
+      return flowInfos!;
+    }
+
     var resp =
         jsonDecode(await getRequest("$instance/flows")) as Map<String, dynamic>;
 
-    return resp.map((key, value) => MapEntry(key, FlowInfo(value)));
+    flowInfos = resp.map((key, value) => MapEntry(key, FlowInfo(value)));
+    return flowInfos!;
   }
 
   // /flow/<id>/info
   Future<FlowInfo> getFlowInfo(String id) async {
+    if (flowInfos != null) {
+      return flowInfos![id]!;
+    }
+
     return FlowInfo(jsonDecode(await getRequest("$instance/flow/$id/info")));
   }
 
@@ -288,6 +315,10 @@ class API {
   }
 
   Future<Location> getLocation(String id) async {
+    if (locations != null) {
+      return locations![id]!;
+    }
+
     var resp = jsonDecode(await getRequest("$instance/location/$id"));
     return Location(resp);
   }

lib/pages/flow/active_flow_page.dart

@@ -62,7 +62,6 @@ class _ActiveFlowPageState extends State<ActiveFlowPage> {
                 }
               },
               icon: const Icon(Icons.stop)),
-          // todo : continue next flow
           if (widget.info.next != null)
             IconButton(
                 onPressed: () {

lib/pages/flow/create_flow_page.dart

@@ -3,7 +3,6 @@ import 'package:cdb_ui/pages/flow/active_flow_page.dart';
 import 'package:cdb_ui/pages/transaction.dart';
 import 'package:flutter/material.dart';
 
-
 class CreateFlowPage extends StatefulWidget {
   final API.FlowInfo info;
   final Function refresh;
@@ -77,13 +76,30 @@ class _CreateFlowPageState extends State<CreateFlowPage> {
     }).toList());
   }
 
+  Widget flowContinuation() {
+    return Row(
+      children: [
+        Card(
+          child: Text(widget.previousFlow!.kind),
+        ),
+        const Text(" -> "),
+        Card(
+          child: Text(widget.info.name),
+        )
+      ],
+    );
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(title: Text("Create new ${widget.info.name} Flow")),
       body: Column(
         children: [
-          // todo : flow continuation overview
+          if (widget.previousFlow != null) ...[
+            flowContinuation(),
+            const Divider()
+          ],
           buildInputSelection(context),
           const Divider(),
           Card(
@@ -99,4 +115,4 @@ class _CreateFlowPageState extends State<CreateFlowPage> {
       ),
     );
   }
-}
+}

lib/pages/flow/end_flow_page.dart

@@ -78,7 +78,6 @@ class _EndFlowWithProduceState extends State<EndFlowWithProduce> {
 
   @override
   Widget build(BuildContext context) {
-    // todo : show end screen with produce
     return Scaffold(
       appBar: AppBar(
         title: Text("End ${widget.info.name} Flow"),
@@ -87,7 +86,6 @@ class _EndFlowWithProduceState extends State<EndFlowWithProduce> {
         children: [
           ...addProduceButtons(),
           const Divider(),
-          // todo : add produced list
           ...produces.map((x) {
             return TransactionCard(
               x.transaction(locations),

lib/pages/supply.dart

@@ -50,7 +50,6 @@ class _SupplyPageState extends State<SupplyPage> {
       _formKey.currentState!.save();
 
       if (widget.onCreate != null) {
-        // todo : create shadow transaction
         var t = SupplyForm(
             itemID: widget.item.id,
             variant: variant,