Create detail view for part stock

- Shows all in-stock stock items

lib/inventree/part.dart

@@ -147,10 +147,38 @@ class InvenTreePart extends InvenTreeModel {
     };
   }
 
+  // Cached list of stock items
+  List<InvenTreeStockItem> stockItems = List<InvenTreeStockItem>();
+
+  int get stockItemCount => stockItems.length;
+
+  // Request stock items for this part
+  Future<void> getStockItems(BuildContext context, {bool showDialog=false}) async {
+
+    InvenTreeStockItem().list(
+      context,
+      filters: {
+        "part": "${pk}",
+        "in_stock": "true",
+      },
+      dialog: showDialog,
+    ).then((var items) {
+      stockItems.clear();
+
+      for (var item in items) {
+        if (item is InvenTreeStockItem) {
+          stockItems.add(item);
+        }
+      }
+    });
+  }
+
+  // Cached list of test templates
   List<InvenTreePartTestTemplate> testingTemplates = List<InvenTreePartTestTemplate>();
 
   int get testTemplateCount => testingTemplates.length;
 
+  // Request test templates from the serve
   Future<void> getTestTemplates(BuildContext context, {bool showDialog=false}) async {
 
     InvenTreePartTestTemplate().list(

lib/inventree/stock.dart

@@ -283,9 +283,9 @@ class InvenTreeStockItem extends InvenTreeModel {
   String get locationName {
     String loc = '';
 
-    if (jsondata.containsKey('location_detail')) {
+    if (locationId == -1 || !jsondata.containsKey('location_detail')) return 'Unknown Location';
+
     loc = jsondata['location_detail']['name'] ?? '';
-    }
 
     // Old-style name
     if (loc.isEmpty) {
@@ -298,11 +298,9 @@ class InvenTreeStockItem extends InvenTreeModel {
   String get locationPathString {
     String path = '';
 
-    if (jsondata.containsKey('location_detail')) {
+    if (locationId == -1 || !jsondata.containsKey('location_detail')) return 'No location specified';
-      path = jsondata['location_detail']['pathstring'] ?? '';
-    }
 
-    return path;
+    return jsondata['location_detail']['pathstring'] ?? '';
   }
 
   String get displayQuantity {

lib/widget/location_display.dart

@@ -220,7 +220,9 @@ class SublocationList extends StatelessWidget {
     return ListView.builder(
         shrinkWrap: true,
         physics: ClampingScrollPhysics(),
-        itemBuilder: _build, itemCount: _locations.length);
+        itemBuilder: _build,
+        itemCount: _locations.length
+    );
   }
 }
 

lib/widget/part_detail.dart

@@ -3,6 +3,7 @@ import 'package:InvenTree/inventree/part.dart';
 import 'package:InvenTree/widget/category_display.dart';
 import 'package:InvenTree/widget/dialogs.dart';
 import 'package:InvenTree/widget/fields.dart';
+import 'package:InvenTree/widget/part_stock_detail.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
@@ -39,10 +40,23 @@ class _PartDisplayState extends RefreshableState<PartDetailWidget> {
 
   int _tabIndex = 0;
 
+  @override
+  Future<void> onBuild(BuildContext context) async {
+    refresh();
+
+    setState(() {
+
+    });
+  }
+
   @override
   Future<void> request(BuildContext context) async {
     await part.reload(context);
     await part.getTestTemplates(context);
+
+    setState(() {
+
+    });
   }
 
   void _savePart(Map<String, String> values) async {
@@ -121,7 +135,7 @@ class _PartDisplayState extends RefreshableState<PartDetailWidget> {
         child: ListTile(
           title: Text("${part.fullname}"),
           subtitle: Text("${part.description}"),
-          leading: InvenTreeAPI().getImage(part.image),
+          leading: InvenTreeAPI().getImage(part.thumbnail),
           trailing: IconButton(
             icon: FaIcon(FontAwesomeIcons.edit),
             onPressed: _editPartDialog,
@@ -178,7 +192,12 @@ class _PartDisplayState extends RefreshableState<PartDetailWidget> {
           title: Text("Stock"),
           leading: FaIcon(FontAwesomeIcons.boxes),
           trailing: Text("${part.inStock}"),
-          onTap: null,
+          onTap: () {
+            Navigator.push(
+              context,
+              MaterialPageRoute(builder: (context) => PartStockDetailWidget(part))
+            );
+          },
         ),
     );
 

lib/widget/part_stock_detail.dart

@@ -0,0 +1,111 @@
+// Flutter packages
+import 'package:InvenTree/inventree/stock.dart';
+import 'package:InvenTree/widget/refreshable_state.dart';
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+
+// InvenTree packages
+import 'package:InvenTree/api.dart';
+import 'package:InvenTree/inventree/part.dart';
+import 'package:InvenTree/widget/stock_detail.dart';
+import 'package:font_awesome_flutter/font_awesome_flutter.dart';
+
+class PartStockDetailWidget extends StatefulWidget {
+  /*
+   * The PartStockDetail widget displays all "in stock" instances for a given Part
+   */
+
+  PartStockDetailWidget(this.part, {Key key}) : super(key: key);
+
+  final InvenTreePart part;
+
+  @override
+  _PartStockDisplayState createState() => _PartStockDisplayState(part);
+}
+
+
+class _PartStockDisplayState extends RefreshableState<PartStockDetailWidget> {
+
+  @override
+  String getAppBarTitle(BuildContext context) { return "Part Stock"; }
+
+  _PartStockDisplayState(this.part) {
+    // TODO
+  }
+
+  InvenTreePart part;
+
+  @override
+  Future<void> onBuild(BuildContext context) async {
+    refresh();
+    print("onBuild");
+  }
+
+  @override
+  Future<void> request(BuildContext context) async {
+    await part.reload(context);
+    await part.getStockItems(context);
+
+    print("request");
+    setState(() {
+    });
+  }
+
+  @override
+  Widget getBody(BuildContext context) {
+    return ListView(
+      children: <Widget>[
+        Card(
+          child: ListTile(
+            title: Text(part.fullname),
+            subtitle: Text(part.description),
+            leading: InvenTreeAPI().getImage(part.thumbnail),
+            trailing: Text('${part.inStock}'),
+          )
+        ),
+        PartStockList(part.stockItems),
+      ]
+    );
+  }
+}
+
+
+class PartStockList extends StatelessWidget {
+  final List<InvenTreeStockItem> _items;
+
+  PartStockList(this._items);
+
+  void _openItem(BuildContext context, int pk) {
+    // Load detail view for stock item
+    InvenTreeStockItem().get(context, pk).then((var item) {
+      if (item is InvenTreeStockItem) {
+        Navigator.push(context, MaterialPageRoute(builder: (context) => StockDetailWidget(item)));
+      }
+    });
+  }
+
+  Widget _build(BuildContext context, int index) {
+
+    InvenTreeStockItem item = _items[index];
+
+    return ListTile(
+      title: Text("${item.locationName}"),
+      subtitle: Text("${item.locationPathString}"),
+      trailing: Text("${item.quantity}"),
+      leading: FaIcon(FontAwesomeIcons.mapMarkerAlt),
+      onTap: () {
+        _openItem(context, item.pk);
+      },
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return ListView.builder(
+      shrinkWrap: true,
+      physics: ClampingScrollPhysics(),
+      itemBuilder: _build,
+      itemCount: _items.length
+    );
+  }
+}