Update status codes (#307)

* Extra error info when connecting to server

* Adds accessors for various types of status codes

* Cleanup / refactor stock status codes

- No longer need to duplicate these on the app

* improvements to purchase order list

- Add option to show closed orders
- Render order status

* Add purchase order status to order detail widget

* Update release notes

* Cleanup for imports

* linting fixes

lib/inventree/status_codes.dart

@@ -0,0 +1,112 @@
+/*
+ * Code for querying the server for various status code data,
+ * so that we do not have to duplicate those codes in the app.
+ *
+ * Ref: https://github.com/inventree/InvenTree/blob/master/InvenTree/InvenTree/status_codes.py
+ */
+
+import "package:flutter/material.dart";
+
+import "package:inventree/api.dart";
+import "package:inventree/helpers.dart";
+
+
+/*
+ * Base class definition for a "status code" definition.
+ */
+class InvenTreeStatusCode {
+
+  InvenTreeStatusCode(this.URL);
+
+  final String URL;
+
+  // Internal status code data loaded from server
+  Map<String, dynamic> data = {};
+
+  // Load status code information from the server
+  Future<void> load({bool forceReload = false}) async {
+
+    // Return internally cached data
+    if (data.isNotEmpty && !forceReload) {
+      return;
+    }
+
+    // The server must support this feature!
+    if (!InvenTreeAPI().supportsStatusLabelEndpoints) {
+      return;
+    }
+
+    debug("Loading status codes from ${URL}");
+
+    APIResponse response = await InvenTreeAPI().get(URL);
+
+    if (response.statusCode == 200) {
+      Map<String, dynamic> results = response.data as Map<String, dynamic>;
+
+      if (results.containsKey("values")) {
+        data = results["values"] as Map<String, dynamic>;
+      }
+    }
+  }
+
+  // Return the entry associated with the provided integer status
+  Map<String, dynamic> entry(int status) {
+    for (String key in data.keys) {
+      dynamic _entry = data[key];
+
+      if (_entry is Map<String, dynamic>) {
+        dynamic _status = _entry["key"];
+
+        if (_status is int) {
+          if (status == _status) {
+            return _entry;
+          }
+        }
+      }
+    }
+
+    // No match - return an empty map
+    return {};
+  }
+
+  // Return the 'label' associated with a given status code
+  String label(int status) {
+    Map<String, dynamic> _entry = entry(status);
+
+    String _label = (_entry["label"] ?? "") as String;
+
+    if (_label.isEmpty) {
+      // If no match found, return the status code
+      debug("No match for status code ${status} at '${URL}'");
+      return status.toString();
+    } else {
+      return _label;
+    }
+  }
+
+  // Return the 'color' associated with a given status code
+  Color color(int status) {
+    Map<String, dynamic> _entry = entry(status);
+
+    String color_name = (_entry["color"] ?? "") as String;
+
+    switch (color_name.toLowerCase()) {
+      case "success":
+        return Colors.green;
+      case "primary":
+        return Colors.blue;
+      case "secondary":
+        return Colors.grey;
+      case "dark":
+        return Colors.black;
+      case "danger":
+        return Colors.red;
+      case "warning":
+        return Colors.orange;
+      case "info":
+        return Colors.lightBlue;
+      default:
+        return Colors.black;
+    }
+  }
+}

lib/inventree/stock.dart

@@ -1,6 +1,5 @@
 import "dart:async";
 
-import "package:flutter/material.dart";
 import "package:intl/intl.dart";
 import "package:inventree/helpers.dart";
 import "package:inventree/inventree/part.dart";
@@ -122,66 +121,10 @@ class InvenTreeStockItem extends InvenTreeModel {
 
   InvenTreeStockItem.fromJson(Map<String, dynamic> json) : super.fromJson(json);
 
-  // Stock status codes
-  static const int OK = 10;
-  static const int ATTENTION = 50;
-  static const int DAMAGED = 55;
-  static const int DESTROYED = 60;
-  static const int REJECTED = 65;
-  static const int LOST = 70;
-  static const int QUARANTINED = 75;
-  static const int RETURNED = 85;
-
-  String statusLabel() {
-
-    // TODO: Delete me - The translated status values should be provided by the API!
-
-    switch (status) {
-      case OK:
-        return L10().ok;
-      case ATTENTION:
-        return L10().attention;
-      case DAMAGED:
-        return L10().damaged;
-      case DESTROYED:
-        return L10().destroyed;
-      case REJECTED:
-        return L10().rejected;
-      case LOST:
-        return L10().lost;
-      case QUARANTINED:
-        return L10().quarantined;
-      case RETURNED:
-        return L10().returned;
-      default:
-        return status.toString();
-    }
-  }
-
-  // Return color associated with stock status
-  Color get statusColor {
-    switch (status) {
-      case OK:
-        return Colors.black;
-      case ATTENTION:
-        return Color(0xFFfdc82a);
-      case DAMAGED:
-      case DESTROYED:
-      case REJECTED:
-        return Color(0xFFe35a57);
-      case QUARANTINED:
-        return Color(0xFF0DCAF0);
-      case LOST:
-      default:
-        return Color(0xFFAAAAAA);
-    }
-  }
-
   @override
   String get URL => "stock/";
 
   // URLs for performing stock actions
-
   static String transferStockUrl() => "stock/transfer/";
 
   static String countStockUrl() => "stock/count/";