TemplateFactory: added support for custom Template implementation [Cl…

…oses #159][Closes #141]

With this change it's possible to simply use custom Template implementation. Usage example in config.neon:

latte:
    templateClass: App\CustomTemplateImplementation

Custom template  MUST extend Nette\Bridges\ApplicationLatte\Template.

src/Bridges/ApplicationDI/LatteExtension.php

@@ -19,6 +19,7 @@ class LatteExtension extends Nette\DI\CompilerExtension
 	public $defaults = [
 		'xhtml' => FALSE,
 		'macros' => [],
+		'templateClass' => NULL,
 	];
 
 	/** @var bool */
@@ -54,7 +55,8 @@ public function loadConfiguration()
 
 		$builder->addDefinition($this->prefix('templateFactory'))
 			->setClass(Nette\Application\UI\ITemplateFactory::class)
-			->setFactory(Nette\Bridges\ApplicationLatte\TemplateFactory::class);
+			->setFactory(Nette\Bridges\ApplicationLatte\TemplateFactory::class)
+			->setArguments(['templateClass' => $config['templateClass']]);
 
 		foreach ($config['macros'] as $macro) {
 			$this->addMacro($macro);

src/Bridges/ApplicationLatte/TemplateFactory.php

@@ -31,14 +31,21 @@ class TemplateFactory implements UI\ITemplateFactory
 	/** @var Nette\Caching\IStorage */
 	private $cacheStorage;
 
+	/** @var string */
+	private $templateClass;
+
 
 	public function __construct(ILatteFactory $latteFactory, Nette\Http\IRequest $httpRequest = NULL,
-		Nette\Security\User $user = NULL, Nette\Caching\IStorage $cacheStorage = NULL)
+		Nette\Security\User $user = NULL, Nette\Caching\IStorage $cacheStorage = NULL, $templateClass = NULL)
 	{
 		$this->latteFactory = $latteFactory;
 		$this->httpRequest = $httpRequest;
 		$this->user = $user;
 		$this->cacheStorage = $cacheStorage;
+		if ($templateClass && (!class_exists($templateClass) || !is_a($templateClass, Template::class, TRUE))) {
+			throw new Nette\InvalidArgumentException("Class $templateClass does not extend " . Template::class . ' or it does not exist.');
+		}
+		$this->templateClass = $templateClass ?: Template::class;
 	}
 
 
@@ -48,7 +55,7 @@ public function __construct(ILatteFactory $latteFactory, Nette\Http\IRequest $ht
 	public function createTemplate(UI\Control $control = NULL)
 	{
 		$latte = $this->latteFactory->create();
-		$template = new Template($latte);
+		$template = new $this->templateClass($latte);
 		$presenter = $control ? $control->getPresenter(FALSE) : NULL;
 
 		if ($control instanceof UI\Presenter) {

tests/Bridges.Latte/TemplateFactory.customTemplate.phpt

@@ -0,0 +1,76 @@
+<?php
+
+/**
+ * Test: TemplateFactory custom template
+ */
+
+use Nette\Application\UI;
+use Nette\Bridges\ApplicationLatte\Template;
+use Nette\Bridges\ApplicationLatte\TemplateFactory;
+use Tester\Assert;
+
+
+require __DIR__ . '/../bootstrap.php';
+
+
+class LatteFactoryMock implements Nette\Bridges\ApplicationLatte\ILatteFactory
+{
+	private $engine;
+
+	public function __construct(Latte\Engine $engine)
+	{
+		$this->engine = $engine;
+	}
+
+	public function create()
+	{
+		return $this->engine;
+	}
+}
+
+class TemplateMockWithoutImplement
+{
+
+}
+
+class TemplateMock extends Nette\Bridges\ApplicationLatte\Template
+{
+	private $file = 'ko';
+
+	public function render()
+	{
+		return strrev($this->file);
+	}
+
+	public function setFile($file)
+	{
+		$this->file = $file;
+	}
+
+	public function getFile()
+	{
+		return $this->file;
+	}
+}
+
+
+test(function () {
+	$factory = new TemplateFactory(new LatteFactoryMock(new Latte\Engine));
+	Assert::type(Template::class, $factory->createTemplate());
+});
+
+Assert::exception(function () {
+	$factory = new TemplateFactory(new LatteFactoryMock(new Latte\Engine), NULL, NULL, NULL, TemplateMockWithoutImplement::class);
+}, \Nette\InvalidArgumentException::class, 'Class TemplateMockWithoutImplement does not extend Nette\Bridges\ApplicationLatte\Template or it does not exist.');
+
+
+test(function () {
+	$factory = new TemplateFactory(new LatteFactoryMock(new Latte\Engine), NULL, NULL, NULL, TemplateMock::class);
+	$template = $factory->createTemplate();
+	Assert::type(TemplateMock::class, $template);
+	Assert::type(UI\ITemplate::class, $template);
+	Assert::same([], $template->flashes);
+	Assert::same('ok', $template->render());
+	$template->setFile('bla');
+	Assert::same('alb', $template->render());
+});