<?php
/**
 * @package     Joomla.Administrator
 * @subpackage  com_joomlaupdate
 *
 * @copyright   (C) 2012 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\Component\Joomlaupdate\Administrator\View\Joomlaupdate;

\defined('_JEXEC') or die;

use Joomla\CMS\Component\ComponentHelper;
use Joomla\CMS\Factory;
use Joomla\CMS\Language\Text;
use Joomla\CMS\MVC\View\HtmlView as BaseHtmlView;
use Joomla\CMS\Toolbar\ToolbarHelper;
use Joomla\CMS\Version;

/**
 * Joomla! Update's Default View
 *
 * @since  2.5.4
 */
class HtmlView extends BaseHtmlView
{
	/**
	 * An array with the Joomla! update information.
	 *
	 * @var    array
	 *
	 * @since  3.6.0
	 */
	protected $updateInfo = null;

	/**
	 * PHP options.
	 *
	 * @var   array  Array of PHP config options
	 *
	 * @since 3.10.0
	 */
	protected $phpOptions = null;

	/**
	 * PHP settings.
	 *
	 * @var   array  Array of PHP settings
	 *
	 * @since 3.10.0
	 */
	protected $phpSettings = null;

	/**
	 * Non Core Extensions.
	 *
	 * @var   array  Array of Non-Core-Extensions
	 *
	 * @since 3.10.0
	 */
	protected $nonCoreExtensions = null;

	/**
	 * The model state
	 *
	 * @var    \JObject
	 * @since  4.0.0
	 */
	protected $state;

	/**
	 * Flag if the update component itself has to be updated
	 *
	 * @var boolean  True when update is available otherwise false
	 *
	 * @since 4.0.0
	 */
	protected $selfUpdateAvailable = false;

	/**
	 * The default admin template for the major version of Joomla that should be used when
	 * upgrading to the next major version of Joomla
	 *
	 * @var string
	 *
	 * @since 4.0.0
	 */
	protected $defaultBackendTemplate = 'atum';

	/**
	 * Flag if the update component itself has to be updated
	 *
	 * @var boolean  True when default backend template is being used
	 *
	 * @since 4.0.0
	 */
	protected $isDefaultBackendTemplate = false;

	/**
	 * A special prefix used for the emptystate layout variable
	 *
	 * @var string  The prefix
	 *
	 * @since 4.0.0
	 */
	protected $messagePrefix = '';

	/**
	 * Flag if the update component itself has to be updated
	 *
	 * @var    \stdClass[]
	 * @since  4.0.0
	 */
	protected $nonCoreCriticalPlugins = [];

	/**
	 * Renders the view
	 *
	 * @param   string  $tpl  Template name
	 *
	 * @return void
	 *
	 * @since  2.5.4
	 */
	public function display($tpl = null)
	{
		$this->updateInfo          = $this->get('UpdateInformation');
		$this->selfUpdateAvailable = $this->get('CheckForSelfUpdate');

		// Get results of pre update check evaluations
		$model                          = $this->getModel();
		$this->phpOptions               = $this->get('PhpOptions');
		$this->phpSettings              = $this->get('PhpSettings');
		$this->nonCoreExtensions        = $this->get('NonCoreExtensions');
		$this->isDefaultBackendTemplate = (bool) $model->isTemplateActive($this->defaultBackendTemplate);
		$nextMajorVersion               = Version::MAJOR_VERSION + 1;

		// The critical plugins check is only available for major updates.
		if (version_compare($this->updateInfo['latest'], (string) $nextMajorVersion, '>='))
		{
			$this->nonCoreCriticalPlugins = $this->get('NonCorePlugins');
		}

		// Set to true if a required PHP option is not ok
		$isCritical = false;

		foreach ($this->phpOptions as $option)
		{
			if (!$option->state)
			{
				$isCritical = true;
				break;
			}
		}

		$this->state = $this->get('State');

		$hasUpdate = !empty($this->updateInfo['hasUpdate']);
		$hasDownload = isset($this->updateInfo['object']->downloadurl->_data);

		// Fresh update, show it
		if ($this->getLayout() == 'complete')
		{
			// Complete message, nothing to do here
		}
		// There is an update for the updater itself. So we have to update it first
		elseif ($this->selfUpdateAvailable)
		{
			$this->setLayout('selfupdate');
		}
		elseif (!$hasDownload || !$hasUpdate)
		{
			// Could be that we have a download file but no update, so we offer a re-install
			if ($hasDownload)
			{
				// We can reinstall if we have a URL but no update
				$this->setLayout('reinstall');
			}
			// No download available
			else
			{
				if ($hasUpdate)
				{
					$this->messagePrefix = '_NODOWNLOAD';
				}

				$this->setLayout('noupdate');
			}
		}
		// Here we have now two options: preupdatecheck or update
		elseif ($this->getLayout() != 'update' && ($isCritical || $this->shouldDisplayPreUpdateCheck()))
		{
			$this->setLayout('preupdatecheck');
		}
		else
		{
			$this->setLayout('update');
		}

		if (in_array($this->getLayout(), ['preupdatecheck', 'update', 'upload']))
		{
			$language = Factory::getLanguage();
			$language->load('com_installer', JPATH_ADMINISTRATOR, 'en-GB', false, true);
			$language->load('com_installer', JPATH_ADMINISTRATOR, null, true);

			Factory::getApplication()->enqueueMessage(Text::_('COM_JOOMLAUPDATE_VIEW_DEFAULT_UPDATE_NOTICE'), 'notice');
		}

		$params = ComponentHelper::getParams('com_joomlaupdate');

		switch ($params->get('updatesource', 'default'))
		{
			// "Minor & Patch Release for Current version AND Next Major Release".
			case 'next':
				$this->langKey         = 'COM_JOOMLAUPDATE_VIEW_DEFAULT_UPDATES_INFO_NEXT';
				$this->updateSourceKey = Text::_('COM_JOOMLAUPDATE_CONFIG_UPDATESOURCE_NEXT');
				break;

			// "Testing"
			case 'testing':
				$this->langKey         = 'COM_JOOMLAUPDATE_VIEW_DEFAULT_UPDATES_INFO_TESTING';
				$this->updateSourceKey = Text::_('COM_JOOMLAUPDATE_CONFIG_UPDATESOURCE_TESTING');
				break;

			// "Custom"
			case 'custom':
				$this->langKey         = 'COM_JOOMLAUPDATE_VIEW_DEFAULT_UPDATES_INFO_CUSTOM';
				$this->updateSourceKey = Text::_('COM_JOOMLAUPDATE_CONFIG_UPDATESOURCE_CUSTOM');
				break;

			/**
			 * "Minor & Patch Release for Current version (recommended and default)".
			 * The commented "case" below are for documenting where 'default' and legacy options falls
			 * case 'default':
			 * case 'sts':
			 * case 'lts':
			 * case 'nochange':
			 */
			default:
				$this->langKey         = 'COM_JOOMLAUPDATE_VIEW_DEFAULT_UPDATES_INFO_DEFAULT';
				$this->updateSourceKey = Text::_('COM_JOOMLAUPDATE_CONFIG_UPDATESOURCE_DEFAULT');
		}

		// Remove temporary files
		$this->getModel()->removePackageFiles();

		$this->addToolbar();

		// Render the view.
		parent::display($tpl);
	}

	/**
	 * Add the page title and toolbar.
	 *
	 * @return  void
	 *
	 * @since   4.0.0
	 */
	protected function addToolbar()
	{
		// Set the toolbar information.
		ToolbarHelper::title(Text::_('COM_JOOMLAUPDATE_OVERVIEW'), 'joomla install');

		if (in_array($this->getLayout(), ['update', 'complete']))
		{
			$arrow = Factory::getLanguage()->isRtl() ? 'arrow-right' : 'arrow-left';

			ToolbarHelper::link('index.php?option=com_joomlaupdate', 'JTOOLBAR_BACK', $arrow);

			ToolbarHelper::title(Text::_('COM_JOOMLAUPDATE_VIEW_DEFAULT_TAB_UPLOAD'), 'joomla install');
		}
		elseif (!$this->selfUpdateAvailable)
		{
			ToolbarHelper::custom('update.purge', 'loop', '', 'COM_JOOMLAUPDATE_TOOLBAR_CHECK', false);
		}

		// Add toolbar buttons.
		if (Factory::getUser()->authorise('core.admin'))
		{
			ToolbarHelper::preferences('com_joomlaupdate');
		}

		ToolbarHelper::divider();
		ToolbarHelper::help('Joomla_Update');
	}

	/**
	 * Returns true, if the pre update check should be displayed.
	 *
	 * @return boolean
	 *
	 * @since 3.10.0
	 */
	public function shouldDisplayPreUpdateCheck()
	{
		$nextMinor = Version::MAJOR_VERSION . '.' . (Version::MINOR_VERSION + 1);

		// Show only when we found a download URL, we have an update and when we update to the next minor or greater.
		return $this->updateInfo['hasUpdate']
			&& version_compare($this->updateInfo['latest'], $nextMinor, '>=');
	}
}
