Fix isRootTemplate

CHANGELOG.md

@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## 0.4.3
+
+* `isRootTemplate` now work even if you have called the `renderResource` helper inside a view
+
 ## 0.4.2
 
 * Does not modify status code response if an exception is contained into the MvcEvent

src/View/Renderer/ResourceRenderer.php

@@ -121,20 +121,24 @@ public function isRootTemplate()
      */
     public function render($nameOrModel, $values = null)
     {
-        // We set the currently rendered view model into the viewModel helper. This allows to render additional
-        // properties in the view by comparing the root and nested view model
-        $this->viewModel()->setCurrent($nameOrModel);
+        /** @var \Zend\View\Helper\ViewModel $viewModelHelper */
+        $viewModelHelper = $this->helperPluginManager->get('viewModel');
+
+        // Because templates can be rendered recursively, we need to save the current context
+        $previousViewModel = $viewModelHelper->getCurrent();
 
         $template = $this->resolver->resolve($nameOrModel->getTemplate());
 
         // We need to save and restore the previous variables, because the same renderer can be used inside
         // multiple contexts
-        $previousTemplateVariables = $this->templateVariables;
-        $this->templateVariables   = $nameOrModel->getVariables();
+        $viewModelHelper->setCurrent($nameOrModel);
+        $this->templateVariables = $nameOrModel->getVariables();
 
         $result = include $template;
 
-        $this->templateVariables = $previousTemplateVariables;
+        // Restore the previous context
+        $this->templateVariables = $previousViewModel->getVariables();
+        $viewModelHelper->setCurrent($previousViewModel);
 
         return $result;
     }

src/View/Strategy/ResourceStrategy.php

@@ -98,9 +98,12 @@ public function selectRenderer(ViewEvent $event)
 
         // If we have a ResourceViewModel, we set it as the "root" view model in the view model helper. This allows
         // to differentiate between a nested context or not, in the view
-        /** @var \Zend\View\Helper\ViewModel $viewModel */
-        $viewModel = $this->renderer->viewModel();
-        $viewModel->setRoot($event->getModel());
+        /** @var \Zend\View\Helper\ViewModel $viewModelHelper */
+        $viewModelHelper = $helperPluginManager->get('viewModel');
+        $viewModel       = $event->getModel();
+
+        $viewModelHelper->setRoot($viewModel);
+        $viewModelHelper->setCurrent($viewModel);
 
         return $this->renderer;
     }

tests/ZfrRestTest/View/Strategy/ResourceStrategyTest.php

@@ -23,6 +23,8 @@
 use Zend\EventManager\SharedEventManagerInterface;
 use Zend\Mvc\MvcEvent;
 use Zend\Stdlib\DispatchableInterface;
+use Zend\View\Helper\ViewModel;
+use Zend\View\HelperPluginManager;
 use Zend\View\Model\JsonModel;
 use Zend\View\Model\ModelInterface;
 use Zend\View\ViewEvent;
@@ -81,4 +83,34 @@ public function testDoNotSetTemplateIfNotResourceViewModel()
 
         $this->resourceStrategy->setTemplate($mvcEvent);
     }
+
+    public function testDoNotSelectRenderIfNotResourceViewModel()
+    {
+        $model = $this->getMock(ModelInterface::class);
+
+        $viewEvent = new ViewEvent();
+        $viewEvent->setModel($model);
+
+        $this->assertNull($this->resourceStrategy->selectRenderer($viewEvent));
+    }
+
+    public function testProperlyFillViewModelHelperIfRendererIsSelected()
+    {
+        $model = new ResourceViewModel();
+
+        $viewEvent = new ViewEvent();
+        $viewEvent->setModel($model);
+
+        $viewModelHelper = $this->getMock(ViewModel::class, [], [], '', false);
+        $viewModelHelper->expects($this->once())->method('setRoot')->with($model);
+        $viewModelHelper->expects($this->once())->method('setCurrent')->with($model);
+
+        $helperManager = $this->getMock(HelperPluginManager::class, [], [], '', false);
+        $helperManager->expects($this->once())->method('setRenderer')->with($this->resourceRenderer);
+        $helperManager->expects($this->once())->method('get')->with('viewModel')->willReturn($viewModelHelper);
+
+        $this->resourceRenderer->expects($this->once())->method('getHelperPluginManager')->willReturn($helperManager);
+
+        $this->assertSame($this->resourceRenderer, $this->resourceStrategy->selectRenderer($viewEvent));
+    }
 }