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administrator/manifests/packages/jem/pkg_install.php

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+<?php
+/**
+ * JEM Package
+ * @package    JEM.Package
+ *
+ * @copyright  (C) 2013-2024 joomlaeventmanager.net
+ * @license    https://www.gnu.org/licenses/gpl-3.0 GNU/GPL
+ *
+ * @copyright  (C) 2008 - 2013 Kunena Team. All rights reserved.
+ * @license    https://www.gnu.org/copyleft/gpl.html GNU/GPL
+ * @link https://www.kunena.org
+ **/
+ 
+defined ('_JEXEC') or die;
+
+use Joomla\CMS\Factory;
+use Joomla\CMS\Version;
+use Joomla\CMS\Table\Table;
+use Joomla\CMS\Router\Route;
+/**
+ * JEM package installer script.
+ */
+class Pkg_JemInstallerScript
+{
+	/**
+	 * List of supported versions. Newest version first!
+	 * @var array
+	 */
+	protected $versions = array(
+		'PHP' => array (
+			'8.0' => '8.0',
+			'0' => '8.0' // Preferred version
+			),
+		'MySQL' => array (
+			'8.0' => '8.0', 
+			'5.6' => '5.6',
+			'0' => '5.6' // Preferred version
+			),
+		'Joomla!' => array (
+			'4.2' => '4.2', 
+			'4.0' => '', 
+			'0' => '4.2' // Preferred version
+			)
+		);
+
+	/**
+	 * List of required PHP extensions.
+	 * @var array
+	 */
+	protected $extensions = array ('gd', 'json', 'pcre', 'ctype', 'SimpleXML' /* iCalCreator */	);
+
+	public function install($parent) {
+		return true;
+	}
+
+	public function discover_install($parent) {
+		return self::install($parent);
+	}
+
+	public function update($parent) {
+		return self::install($parent);
+	}
+
+	public function uninstall($parent) {
+		return true;
+	}
+
+	public function preflight($type, $parent) {
+        // Prevent installation if requirements are not met.
+		if (!$this->checkRequirements()){
+            return false;
+        }
+		return true;
+	}
+
+	public function makeRoute($uri) {
+		return Route::_($uri, false);
+	}
+
+	public function postflight($type, $parent) {
+		// Clear Joomla system cache.
+		/** @var JCache|JCacheController $cache */
+		$cache = Factory::getCache();
+		$cache->clean('_system');
+
+		// Remove all compiled files from APC cache.
+		if (function_exists('apc_clear_cache')) {
+			@apc_clear_cache();
+		}
+
+		if ($type == 'uninstall') return true;
+
+		$this->enablePlugin('content', 'jem');
+		$this->enablePlugin('content', 'jemlistevents');
+		$this->enablePlugin('quickicon', 'jem');
+	//	$this->enablePlugin('finder', 'jem');
+	//	$this->enablePlugin('search', 'jem');
+	//	$this->enablePlugin('jem', 'mailer');
+
+		# ajax calendar module doesn't fully work on Joomla! 2.5
+		if (version_compare(JVERSION, '3', '<')) {
+			$this->disableModule('mod_jem_calajax');
+		}
+
+		return true;
+	}
+
+	function enablePlugin($group, $element) {
+		$plugin = Table::getInstance('extension');
+		if (!$plugin->load(array('type'=>'plugin', 'folder'=>$group, 'element'=>$element))) {
+			return false;
+		}
+		$plugin->enabled = 1;
+		return $plugin->store();
+	}
+
+	function disableModule($element) {
+		$module = Table::getInstance('extension');
+		if (!$module->load(array('type'=>'module', 'element'=>$element))) {
+			return false;
+		}
+		$module->enabled = 0;
+		return $module->store();
+	}
+
+	public function checkRequirements() {
+        $db = Factory::getContainer()->get('DatabaseDriver');
+		$pass  = $this->checkVersion('PHP', phpversion());
+		$pass &= $this->checkVersion('Joomla!', JVERSION);
+		$pass &= $this->checkVersion('MySQL', $db->getVersion ());
+		$pass &= $this->checkDbo($db->name, array('mysql', 'mysqli'));
+		$pass &= $this->checkExtensions($this->extensions);
+		return $pass;
+	}
+
+	// Internal functions
+
+	protected function checkVersion($name, $version) {
+		$app = Factory::getApplication();
+
+		$major = $minor = 0;
+		foreach ($this->versions[$name] as $major=>$minor) {
+			if (!$major || version_compare($version, $major, '<')) {
+                continue;
+            }
+            if ($minor && version_compare($version, $minor, '>=')) {
+                return true;
+            }
+            break;
+		}
+		if (!$major) {
+            $minor = reset($this->versions[$name]);
+        }
+		$recommended = end($this->versions[$name]);
+		if ($minor) {
+			$app->enqueueMessage(sprintf("%s %s is not supported. Minimum required version is %s %s, but it is highly recommended to use %s %s or later.", $name, $version, $name, $minor, $name, $recommended), 'notice');
+		} else {
+			$app->enqueueMessage(sprintf("%s %s is not supported. It is highly recommended to use %s %s or later.", $name, $version, $name, $recommended), 'notice');
+		}
+		return false;
+	}
+
+	protected function checkDbo($name, $types) {
+		$app = Factory::getApplication();
+
+		if (in_array($name, $types)) {
+			return true;
+		}
+		$app->enqueueMessage(sprintf("Database driver '%s' is not supported. Please use MySQL instead.", $name), 'notice');
+		return false;
+	}
+
+	protected function checkExtensions($extensions) {
+		$app = Factory::getApplication();
+
+		$pass = 1;
+		foreach ($extensions as $name) {
+			if (!extension_loaded($name)) {
+				$pass = 0;
+				$app->enqueueMessage(sprintf("Required PHP extension '%s' is missing. Please install it into your system.", $name), 'notice');
+			}
+		}
+		return $pass;
+	}
+
+}