Stock history fix (#320)

* Improves quantity parsing from

* Add paginated history widget

* Refactor stock history widget as a paginated widget

* Allow paginated result list to handle results returned as list

- Some API endpoints (older ones most likely) don't paginate results correctly

* Fix code layout

* Render user information in "history" widget (not quantity)

* Hide filter button

* Update release notes

* remove unused import

lib/widget/stock_item_history.dart

@@ -1,13 +1,14 @@
 import "package:flutter/material.dart";
 
-import "package:inventree/widget/refreshable_state.dart";
+import "package:inventree/api.dart";
 import "package:inventree/l10.dart";
 import "package:inventree/inventree/stock.dart";
 import "package:inventree/inventree/model.dart";
 
+import "package:inventree/widget/paginator.dart";
+import "package:inventree/widget/refreshable_state.dart";
 
 class StockItemHistoryWidget extends StatefulWidget {
-
   const StockItemHistoryWidget(this.item, {Key? key}) : super(key: key);
 
   final InvenTreeStockItem item;
@@ -16,60 +17,78 @@ class StockItemHistoryWidget extends StatefulWidget {
   _StockItemHistoryDisplayState createState() => _StockItemHistoryDisplayState(item);
 }
 
-
 class _StockItemHistoryDisplayState extends RefreshableState<StockItemHistoryWidget> {
-
   _StockItemHistoryDisplayState(this.item);
 
   final InvenTreeStockItem item;
 
+  bool showFilterOptions = false;
+
   @override
   String getAppBarTitle() => L10().stockItemHistory;
 
-  List<InvenTreeStockItemHistory> history = [];
-
   @override
-  Future<void> request(BuildContext refresh) async {
-
-    history.clear();
-
-    await InvenTreeStockItemHistory().list(filters: {"item": "${item.pk}"}).then((List<InvenTreeModel> results) {
-      for (var result in results) {
-        if (result is InvenTreeStockItemHistory) {
-          history.add(result);
-        }
-      }
-
-      // Refresh
-      setState(() {
-      });
-    });
-  }
+  List<Widget> appBarActions(BuildContext context) => [];
 
   @override
   Widget getBody(BuildContext context) {
-    return ListView(
-      children: ListTile.divideTiles(
-        context: context,
-        tiles: historyList(),
-      ).toList()
+    Map<String, String> filters = {
+      "item": widget.item.pk.toString(),
+    };
+
+    return PaginatedStockHistoryList(filters, showFilterOptions);
+  }
+
+}
+
+/*
+ * Widget which displays a paginated stock history list
+ */
+class PaginatedStockHistoryList extends PaginatedSearchWidget {
+  const PaginatedStockHistoryList(Map<String, String> filters, bool showSearch)
+      : super(filters: filters, showSearch: showSearch);
+
+  @override
+  _PaginatedStockHistoryState createState() => _PaginatedStockHistoryState();
+}
+
+/*
+ * State class for the paginated stock history list
+ */
+class _PaginatedStockHistoryState
+    extends PaginatedSearchState<PaginatedStockHistoryList> {
+  _PaginatedStockHistoryState() : super();
+
+  @override
+  String get prefix => "stock_history";
+
+  @override
+  Map<String, String> get orderingOptions => {};
+
+  @override
+  Map<String, Map<String, dynamic>> get filterOptions => {
+        // TODO: Add filter options
+      };
+
+  @override
+  Future<InvenTreePageResponse?> requestPage(
+      int limit, int offset, Map<String, String> params) async {
+    await InvenTreeAPI().StockHistoryStatus.load();
+
+    final page = await InvenTreeStockItemHistory().listPaginated(limit, offset, filters: params);
+
+    return page;
+  }
+
+  @override
+  Widget buildItem(BuildContext context, InvenTreeModel model) {
+    InvenTreeStockItemHistory entry = model as InvenTreeStockItemHistory;
+
+    return ListTile(
+      leading: Text(entry.dateString),
+      trailing: entry.userString.isNotEmpty ? Text(entry.userString) : null,
+      title: Text(entry.label),
+      subtitle: entry.notes.isNotEmpty ? Text(entry.notes) : null,
     );
   }
-
-  List<Widget> historyList() {
-    List<Widget> tiles = [];
-
-    for (var entry in history) {
-      tiles.add(
-        ListTile(
-          leading: Text(entry.dateString),
-          trailing: entry.quantityString.isNotEmpty ? Text(entry.quantityString) : null,
-          title: Text(entry.label),
-          subtitle: entry.notes.isNotEmpty ? Text(entry.notes) : null,
-        )
-      );
-    }
-
-    return tiles;
-  }
-}
+}