[4.0] Component services in Component class

administrator/components/com_associations/Helper/AssociationsHelper.php

@@ -10,6 +10,8 @@
 
 defined('_JEXEC') or die;
 
+use Joomla\CMS\Association\AssociationExtensionInterface;
+use Joomla\CMS\Association\AssociationServiceInterface;
 use Joomla\CMS\Factory;
 use Joomla\CMS\Helper\ContentHelper;
 use Joomla\CMS\Layout\LayoutHelper;
@@ -96,7 +98,7 @@ public static function getExtensionHelper($extensionName)
 	 *
 	 * @return  \Joomla\CMS\Table\Table|null
 	 *
-	 * @since  3.7.00
+	 * @since  3.7.0
 	 */
 	public static function getItem($extensionName, $typeName, $itemId)
 	{
@@ -130,6 +132,43 @@ public static function hasSupport($extensionName)
 		return in_array($extensionName, self::$supportedExtensionsList);
 	}
 
+	/**
+	 * Loads the helper for the given class.
+	 *
+	 * @param   string  $extensionName  The extension name with com_
+	 *
+	 * @return  AssociationExtensionInterface|null
+	 *
+	 * @since  __DEPLOY_VERSION__
+	 */
+	private static function loadHelper($extensionName)
+	{
+		$component = Factory::getApplication()->bootComponent($extensionName);
+
+		if ($component instanceof AssociationServiceInterface)
+		{
+			return $component->getAssociationsExtension();
+		}
+
+		// Check if associations helper exists
+		if (!file_exists(JPATH_ADMINISTRATOR . '/components/' . $extensionName . '/helpers/associations.php'))
+		{
+			return null;
+		}
+
+		require_once JPATH_ADMINISTRATOR . '/components/' . $extensionName . '/helpers/associations.php';
+
+		$componentAssociationsHelperClassName = self::getExtensionHelperClassName($extensionName);
+
+		if (!class_exists($componentAssociationsHelperClassName, false))
+		{
+			return null;
+		}
+
+		// Create an instance of the helper class
+		return new $componentAssociationsHelperClassName;
+	}
+
 	/**
 	 * Get the extension specific helper class name
 	 *
@@ -342,8 +381,7 @@ public static function getSupportedExtension($extensionName)
 		$result->def('associationssupport', false);
 		$result->def('helper', null);
 
-		// Get the associations class
-		$helper = Factory::getApplication()->bootComponent($extensionName)->getAssociationsExtension();
+		$helper = self::loadHelper($extensionName);
 
 		if (!$helper)
 		{

administrator/components/com_categories/Model/CategoriesModel.php

@@ -10,6 +10,8 @@
 
 defined('_JEXEC') or die;
 
+use Joomla\CMS\Categories\CategoriesServiceInterface;
+use Joomla\CMS\Factory;
 use Joomla\CMS\MVC\Factory\MVCFactoryInterface;
 use Joomla\CMS\Language\Associations;
 use Joomla\CMS\MVC\Model\ListModel;
@@ -369,30 +371,19 @@ public function getItems()
 	 */
 	public function countItems(&$items, $extension)
 	{
-		$parts = explode('.', $extension, 2);
-		$component = $parts[0];
-		$section = null;
+		$parts     = explode('.', $extension, 2);
+		$section   = '';
 
 		if (count($parts) > 1)
 		{
 			$section = $parts[1];
 		}
 
-		// Try to find the component helper.
-		$eName = str_replace('com_', '', $component);
-		$file = \JPath::clean(JPATH_ADMINISTRATOR . '/components/' . $component . '/helpers/' . $eName . '.php');
+		$component = Factory::getApplication()->bootComponent($parts[0]);
 
-		if (file_exists($file))
+		if ($component instanceof CategoriesServiceInterface)
 		{
-			$prefix = ucfirst($eName);
-			$cName = $prefix . 'Helper';
-
-			\JLoader::register($cName, $file);
-
-			if (class_exists($cName) && is_callable(array($cName, 'countItems')))
-			{
-				$cName::countItems($items, $section);
-			}
+			$component->countItems($items, $section);
 		}
 	}
 }

administrator/components/com_content/Extension/ContentComponent.php

@@ -0,0 +1,133 @@
+<?php
+/**
+ * @package     Joomla.Administrator
+ * @subpackage  com_content
+ *
+ * @copyright   Copyright (C) 2005 - 2017 Open Source Matters, Inc. All rights reserved.
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Component\Content\Administrator\Extension;
+
+defined('JPATH_PLATFORM') or die;
+
+use Joomla\CMS\Application\SiteApplication;
+use Joomla\CMS\Association\AssociationServiceTrait;
+use Joomla\CMS\Association\AssociationServiceInterface;
+use Joomla\CMS\Categories\CategoriesServiceInterface;
+use Joomla\CMS\Categories\CategoriesServiceTrait;
+use Joomla\CMS\Extension\BootableExtensionInterface;
+use Joomla\CMS\Extension\Component;
+use Joomla\CMS\Fields\FieldsServiceInterface;
+use Joomla\CMS\HTML\HTMLRegistryAwareTrait;
+use Joomla\CMS\MVC\Factory\MVCFactoryServiceTrait;
+use Joomla\CMS\MVC\Factory\MVCFactoryServiceInterface;
+use Joomla\Component\Content\Administrator\Service\HTML\AdministratorService;
+use Joomla\Component\Content\Administrator\Service\HTML\Icon;
+use Psr\Container\ContainerInterface;
+
+/**
+ * Component class for com_content
+ *
+ * @since  __DEPLOY_VERSION__
+ */
+class ContentComponent extends Component implements
+	BootableExtensionInterface, MVCFactoryServiceInterface, CategoriesServiceInterface, FieldsServiceInterface, AssociationServiceInterface
+{
+	use MVCFactoryServiceTrait;
+	use CategoriesServiceTrait;
+	use AssociationServiceTrait;
+	use HTMLRegistryAwareTrait;
+
+	/**
+	 * Booting the extension. This is the function to set up the environment of the extension like
+	 * registering new class loaders, etc.
+	 *
+	 * If required, some initial set up can be done from services of the container, eg.
+	 * registering HTML services.
+	 *
+	 * @param   ContainerInterface  $container  The container
+	 *
+	 * @return  void
+	 *
+	 * @since   __DEPLOY_VERSION__
+	 */
+	public function boot(ContainerInterface $container)
+	{
+		$this->getRegistry()->register('contentadministrator', new AdministratorService);
+		$this->getRegistry()->register('contenticon', new Icon($container->get(SiteApplication::class)));
+
+		// The layout joomla.content.icons does need a general icon service
+		$this->getRegistry()->register('icon', $this->getRegistry()->getService('contenticon'));
+	}
+
+	/**
+	 * Returns a valid section for the given section. If it is not valid then null
+	 * is returned.
+	 *
+	 * @param   string  $section  The section to get the mapping for
+	 * @param   object  $item     The item
+	 *
+	 * @return  string|null  The new section
+	 *
+	 * @since   __DEPLOY_VERSION__
+	 */
+	public function validateSection($section, $item = null)
+	{
+		if (\JFactory::getApplication()->isClient('site'))
+		{
+			// On the front end we need to map some sections
+			switch ($section)
+			{
+				// Editing an article
+				case 'form':
+
+					// Category list view
+				case 'featured':
+				case 'category':
+					$section = 'article';
+			}
+		}
+
+		if ($section != 'article')
+		{
+			// We don't know other sections
+			return null;
+		}
+
+		return $section;
+	}
+
+	/**
+	 * Returns valid contexts
+	 *
+	 * @return  array
+	 *
+	 * @since   __DEPLOY_VERSION__
+	 */
+	public function getContexts(): array
+	{
+		\JFactory::getLanguage()->load('com_content', JPATH_ADMINISTRATOR);
+
+		$contexts = array(
+			'com_content.article'    => \JText::_('COM_CONTENT'),
+			'com_content.categories' => \JText::_('JCATEGORY')
+		);
+
+		return $contexts;
+	}
+
+	/**
+	 * Returns the table for the count items functions for the given section.
+	 *
+	 * @param   string  $section  The section
+	 *
+	 * @return  string|null
+	 *
+	 * @since   __DEPLOY_VERSION__
+	 */
+	protected function getTableNameForSection(string $section = null)
+	{
+		return '#__content';
+	}
+}