Adds attachment support for the StockItem model

lib/inventree/part.dart

@@ -415,7 +415,9 @@ class InvenTreePart extends InvenTreeModel {
   }
 }
 
-
+/*
+ * Class representing an attachment file against a Part object
+ */
 class InvenTreePartAttachment extends InvenTreeAttachment {
 
   InvenTreePartAttachment() : super();

lib/inventree/stock.dart

@@ -601,6 +601,29 @@ class InvenTreeStockItem extends InvenTreeModel {
 }
 
 
+/*
+ * Class representing an attachment file against a StockItem object
+ */
+class InvenTreeStockItemAttachment extends InvenTreeAttachment {
+
+  InvenTreeStockItemAttachment() : super();
+
+  InvenTreeStockItemAttachment.fromJson(Map<String, dynamic> json) : super.fromJson(json);
+
+  @override
+  String get REFERENCE_FIELD => "stock_item";
+
+  @override
+  String get URL => "stock/attachment/";
+
+  @override
+  InvenTreeModel createFromJson(Map<String, dynamic> json) {
+    return InvenTreeStockItemAttachment.fromJson(json);
+  }
+
+}
+
+
 class InvenTreeStockLocation extends InvenTreeModel {
 
   InvenTreeStockLocation() : super();

lib/widget/stock_detail.dart

@@ -7,6 +7,7 @@ import "package:inventree/barcode.dart";
 import "package:inventree/inventree/stock.dart";
 import "package:inventree/inventree/part.dart";
 import "package:inventree/widget/dialogs.dart";
+import "package:inventree/widget/attachment_widget.dart";
 import "package:inventree/widget/location_display.dart";
 import "package:inventree/widget/part_detail.dart";
 import "package:inventree/widget/progress.dart";
@@ -94,6 +95,8 @@ class _StockItemDisplayState extends RefreshableState<StockDetailWidget> {
   // Part object
   InvenTreePart? part;
 
+  int attachmentCount = 0;
+
   @override
   Future<void> onBuild(BuildContext context) async {
 
@@ -126,6 +129,12 @@ class _StockItemDisplayState extends RefreshableState<StockDetailWidget> {
       });
     });
 
+    attachmentCount = await InvenTreeStockItemAttachment().count(
+      filters: {
+        "stock_item": item.pk.toString()
+      }
+    );
+
     // Request information on labels available for this stock item
     if (InvenTreeAPI().pluginsEnabled()) {
       _getLabels();
@@ -694,6 +703,25 @@ class _StockItemDisplayState extends RefreshableState<StockDetailWidget> {
       )
     );
 
+    tiles.add(
+        ListTile(
+          title: Text(L10().attachments),
+          leading: FaIcon(FontAwesomeIcons.fileAlt, color: COLOR_CLICK),
+          trailing: attachmentCount > 0 ? Text(attachmentCount.toString()) : null,
+          onTap: () {
+            Navigator.push(
+                context,
+                MaterialPageRoute(
+                    builder: (context) => AttachmentWidget(
+                        InvenTreeStockItemAttachment(),
+                        item.pk,
+                        InvenTreeAPI().checkPermission("stock", "change"))
+                )
+            );
+          },
+        )
+    );
+
     return tiles;
   }