first commit

plugins/system/httpheaders/postinstall/introduction.php

@@ -0,0 +1,62 @@
+<?php
+
+/**
+ * @package     Joomla.Plugin
+ * @subpackage  System.HttpHeaders
+ *
+ * @copyright   (C) 2018 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+use Joomla\CMS\Factory;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * Checks if the plugin is enabled. If not it returns true, meaning that the
+ * message concerning the HTTPHeaders Plugin should be displayed.
+ *
+ * @return  integer
+ *
+ * @since   4.0.0
+ */
+function httpheaders_postinstall_condition()
+{
+    return !Joomla\CMS\Plugin\PluginHelper::isEnabled('system', 'httpheaders');
+}
+
+/**
+ * Enables the HTTPHeaders plugin
+ *
+ * @return  void
+ *
+ * @since   4.0.0
+ */
+function httpheaders_postinstall_action()
+{
+    // Enable the plugin
+    $db = Factory::getDbo();
+
+    $query = $db->getQuery(true)
+        ->update($db->quoteName('#__extensions'))
+        ->set($db->quoteName('enabled') . ' = 1')
+        ->where($db->quoteName('type') . ' = ' . $db->quote('plugin'))
+        ->where($db->quoteName('folder') . ' = ' . $db->quote('system'))
+        ->where($db->quoteName('element') . ' = ' . $db->quote('httpheaders'));
+    $db->setQuery($query);
+    $db->execute();
+
+    $query = $db->getQuery(true)
+        ->select('extension_id')
+        ->from($db->quoteName('#__extensions'))
+        ->where($db->quoteName('type') . ' = ' . $db->quote('plugin'))
+        ->where($db->quoteName('folder') . ' = ' . $db->quote('system'))
+        ->where($db->quoteName('element') . ' = ' . $db->quote('httpheaders'));
+    $db->setQuery($query);
+    $extensionId = $db->loadResult();
+
+    $url = 'index.php?option=com_plugins&task=plugin.edit&extension_id=' . $extensionId;
+    Factory::getApplication()->redirect($url);
+}