Merge pull request #2367 from anlutro-pull-requests/feature/composer-…

…priority

Sample implementation of composer prioritity

src/Illuminate/View/Environment.php

@@ -292,13 +292,13 @@ public function creator($views, $callback)
 	 * @param  \Closure|string  $callback
 	 * @return array
 	 */
-	public function composer($views, $callback)
+	public function composer($views, $callback, $priority = null)
 	{
 		$composers = array();
 
 		foreach ((array) $views as $view)
 		{
-			$composers[] = $this->addViewEvent($view, $callback);
+			$composers[] = $this->addViewEvent($view, $callback, 'composing: ', $priority);
 		}
 
 		return $composers;
@@ -312,17 +312,17 @@ public function composer($views, $callback)
 	 * @param  string  $prefix
 	 * @return Closure
 	 */
-	protected function addViewEvent($view, $callback, $prefix = 'composing: ')
+	protected function addViewEvent($view, $callback, $prefix = 'composing: ', $priority = null)
 	{
 		if ($callback instanceof Closure)
 		{
-			$this->events->listen($prefix.$view, $callback);
+			$this->addEventListener($prefix.$view, $callback, $priority);
 
 			return $callback;
 		}
 		elseif (is_string($callback))
 		{
-			return $this->addClassEvent($view, $callback, $prefix);
+			return $this->addClassEvent($view, $callback, $prefix, $priority);
 		}
 	}
 
@@ -334,7 +334,7 @@ protected function addViewEvent($view, $callback, $prefix = 'composing: ')
 	 * @param  string   $prefix
 	 * @return \Closure
 	 */
-	protected function addClassEvent($view, $class, $prefix)
+	protected function addClassEvent($view, $class, $prefix, $priority = null)
 	{
 		$name = $prefix.$view;
 
@@ -343,11 +343,30 @@ protected function addClassEvent($view, $class, $prefix)
 		// on the instance. This allows for convenient, testable view composers.
 		$callback = $this->buildClassEventCallback($class, $prefix);
 
-		$this->events->listen($name, $callback);
+		$this->addEventListener($name, $callback, $priority);
 
 		return $callback;
 	}
 
+	/**
+	 * Add a listener to the event dispatcher.
+	 *
+	 * @param string   $name
+	 * @param \Closure $callback
+	 * @param integer  $priority
+	 */
+	protected function addEventListener($name, $callback, $priority = null)
+	{
+		if (is_null($priority))
+		{
+			$this->events->listen($name, $callback);
+		}
+		else
+		{
+			$this->events->listen($name, $callback, $priority);
+		}
+	}
+
 	/**
 	 * Build a class based container callback Closure.
 	 *

tests/View/ViewEnvironmentTest.php

@@ -154,6 +154,17 @@ public function testComposersAreProperlyRegistered()
 	}
 
 
+	public function testComposersAreProperlyRegisteredWithPriority()
+	{
+		$env = $this->getEnvironment();
+		$env->getDispatcher()->shouldReceive('listen')->once()->with('composing: foo', m::type('Closure'), 1);
+		$callback = $env->composer('foo', function() { return 'bar'; }, 1);
+		$callback = $callback[0];
+
+		$this->assertEquals('bar', $callback());
+	}
+
+
 	public function testClassCallbacks()
 	{
 		$env = $this->getEnvironment();