app/Data/ItemsCollection.php

@@ -134,4 +134,37 @@ class ItemsCollection
             'locale' => $this->locales[$locale][$id] ?? ''
         ];
     }
+
+    public function getHierarchy(string $id, string $locale = 'en'): Collection {
+        // Return 404 if the item does not exist
+        $itemData =  $this->items[$id] ?? throw new ItemNotFoundException('Item not found');
+
+        // Initialize the hierarchy with the current item
+        $item = [
+            'item'=> [
+                '_id' => $itemData['_id'],
+                '_name' => $itemData['_name'],
+                '_parent' => $itemData['_parent']
+            ],
+            'locale' => $this->locales[$locale][$id] ?? ''
+        ];
+        $hierarchy = collect([$id => $item]);
+
+        // Check the whole hierarchy and merge into the return variable
+        while (!empty($item['item']['_parent'] ?? '')) {
+            $itemtId = $item['item']['_parent'];
+            $itemData =  $this->items[$itemtId] ?? null;
+            $item = [
+                'item'=> [
+                    '_id' => $itemData['_id'],
+                    '_name' => $itemData['_name'],
+                    '_parent' => $itemData['_parent']
+                ],
+                'locale' => $this->locales[$locale][$itemtId] ?? ''
+            ];
+            $hierarchy = $hierarchy->merge([$itemtId => $item]);
+        }
+
+        return $hierarchy;
+    }
 }

app/Http/Controllers/ItemController.php

@@ -60,6 +60,26 @@ class ItemController extends Controller
         }
     }
 
+
+    /**
+     * @param Request $request The request
+     * @return JsonResponse Either {"error":"item not found"} or an object containing
+     *                      for each id, an object looking like
+     *                      {"item":{"_id":"id","_name":"name","_parent":"parent"}, "locale": {"Description":"description", "Name":"name", "ShortName":"shortName"}}
+     */
+    public function getHierarchy(Request $request): JsonResponse
+    {
+        try {
+            return response()->json($this->itemsCollection->getHierarchy($request->id, $request->locale ?? 'en'));
+        } catch (Throwable $exception) {
+            Log::error($exception->getMessage());
+            Log::error($exception->getTraceAsString());
+            return response()->json([
+                'error' => 'Item not found.',
+            ], Response::HTTP_NOT_FOUND);
+        }
+    }
+
     /**
      * @return JsonResponse
      */

routes/web.php

@@ -18,7 +18,10 @@ $router->get('/', function ()  {
 });
 
 $router->get('/api/locales', 'ItemController@getLocales');
-$router->get('/api/refresh', 'ItemController@refreshAllCache');
-$router->post('/api/search', 'ItemController@search');
-$router->get('/api/item', 'ItemController@getItem');
 
+$router->get('/api/refresh', 'ItemController@refreshAllCache');
+
+$router->post('/api/search', 'ItemController@search');
+
+$router->get('/api/item/hierarchy', 'ItemController@getHierarchy');
+$router->get('/api/item', 'ItemController@getItem');