<?php
/** 
 * @package     VikAppointments - Libraries
 * @subpackage  system
 * @author      E4J s.r.l.
 * @copyright   Copyright (C) 2021 E4J s.r.l. All Rights Reserved.
 * @license     http://www.gnu.org/licenses/gpl-2.0.html GNU/GPL
 * @link        https://vikwp.com
 */

// No direct access
defined('ABSPATH') or die('No script kiddies please!');

/**
 * Helper class to setup the plugin.
 *
 * @since 1.0
 */
class VikAppointmentsBuilder
{
	/**
	 * Loads the .mo language related to the current locale.
	 *
	 * @return 	void
	 */
	public static function loadLanguage()
	{
		static $loaded = false;

		/**
		 * Do not load the languages more than once.
		 * 
		 * @since 1.3
		 */
		if ($loaded)
		{
			return;
		}

		$loaded = true;

		$app = JFactory::getApplication();

		// the language file is located in /languages folder
		$path 	 = VIKAPPOINTMENTS_LANG;

		$handler = VIKAPPOINTMENTS_LIBRARIES . DIRECTORY_SEPARATOR . 'language' . DIRECTORY_SEPARATOR;
		$domain  = 'vikappointments';

		// init language
		$lang = JFactory::getLanguage();
		
		$lang->attachHandler($handler . 'system.php', $domain);
		
		if ($app->isAdmin())
		{
			$lang->attachHandler($handler . 'adminsys.php', $domain);
			$lang->attachHandler($handler . 'admin.php', $domain);
		}

		// always load site language handler as fallback
		$lang->attachHandler($handler . 'site.php', $domain);

		$lang->load($domain, $path);
	}

	/**
	 * Pushes the plugin pages into the WP admin menu.
	 *
	 * @return 	void
	 *
	 * @link 	https://developer.wordpress.org/resource/dashicons/#star-filled
	 */
	public static function setupAdminMenu()
	{
		JLoader::import('adapter.acl.access');
		$capability = JAccess::adjustCapability('core.manage', 'com_vikappointments');

		// set default plugin menu title
		$default_title = JText::translate('COM_VIKAPPOINTMENTS_MENU');
		// let other plugins can filter the menu title
		$title = apply_filters('vikappointments_menu_title', $default_title);

		add_menu_page(
			JText::translate('COM_VIKAPPOINTMENTS'),         // page title
			$title ? $title : $default_title,        // menu title
			$capability,                             // capability
			'vikappointments',                       // slug
			array('VikAppointmentsBody', 'getHtml'), // callback
			'dashicons-calendar-alt',				 // icon
			71									     // ordering
		);
	}

	/**
	 * Setup HTML helper classes.
	 * This method should be used to register custom function
	 * for example to render own layouts.
	 *
	 * @return 	void
	 */
	public static function setupHtmlHelpers()
	{
		// helper method to render calendars layout
		JHtml::register('renderCalendar', function($data)
		{
			JHtml::fetch('script', VAP_SITE_URI . 'assets/js/jquery-ui.min.js');
			JHtml::fetch('stylesheet', VAP_SITE_URI . 'assets/css/jquery-ui.min.css');

			$layout = new JLayoutFile('html.plugins.calendar', null, array('option' => 'com_vikappointments'));
			
			return $layout->render($data);
		});

		// helper method to get the plugin layout file handler
		JHtml::register('layoutfile', function($layoutId, $basePath = null, $options = array())
		{
			$input = JFactory::getApplication()->input;

			if (!isset($options['component']) && !$input->getBool('option'))
			{
				// force layout file in case there is no active plugin
				$options['component'] = 'com_vikappointments';
			}

			return new JLayoutFile($layoutId, $basePath, $options);
		});

		// helper method to include the system JS file
		JHtml::register('system.js', function()
		{
			static $loaded = 0;

			if (!$loaded)
			{
				// include only once
				$loaded = 1;

				$internalFilesOptions = array('version' => VIKAPPOINTMENTS_SOFTWARE_VERSION);

				JHtml::fetch('script', VIKAPPOINTMENTS_CORE_MEDIA_URI . 'js/system.js', $internalFilesOptions, array('id' => 'vap-sys-script'));
				JHtml::fetch('stylesheet', VIKAPPOINTMENTS_CORE_MEDIA_URI . 'css/system.css', $internalFilesOptions, array('id' => 'vap-sys-style'));

				JHtml::fetch('script', VIKAPPOINTMENTS_CORE_MEDIA_URI . 'js/bootstrap.min.js', $internalFilesOptions, array('id' => 'bootstrap-script'));
				JHtml::fetch('stylesheet', VIKAPPOINTMENTS_CORE_MEDIA_URI . 'css/bootstrap.lite.css', $internalFilesOptions, array('id' => 'bootstrap-lite-style'));
			}
		});

		// helper method to register select2 plugin
		JHtml::register('select2', function()
		{
			// stop loading select2 outside of VAP
			// VikAppointments::load_complex_select();
		});
	}

	/**
	 * This method is used to configure teh payments framework.
	 * Here should be registered all the default gateways supported
	 * by the plugin.
	 *
	 * @return 	void
	 */
	public static function configurePaymentFramework()
	{
		// push the pre-installed gateways within the payment drivers list
		add_filter('get_supported_payments_vikappointments', function($drivers)
		{
			$list = glob(VIKAPPOINTMENTS_LIBRARIES . DIRECTORY_SEPARATOR . 'payments' . DIRECTORY_SEPARATOR . '*.php');

			return array_merge($drivers, $list);
		});

		// load payment handlers when dispatched
		add_action('load_payment_gateway_vikappointments', function(&$drivers, $payment)
		{
			$classname = null;
			
			VikAppointmentsLoader::import('payments.' . $payment);

			switch ($payment)
			{
				case 'paypal':
					$classname = 'VikAppointmentsPayPalPayment';
					break;

				case 'paypal_express_checkout':
					$classname = 'VikAppointmentsPayPalExpressCheckoutPayment';
					break;

				case 'offline_credit_card':
					$classname = 'VikAppointmentsOfflineCreditCardPayment';
					break;

				case 'bank_transfer':
					$classname = 'VikAppointmentsBankTransferPayment';
					break;
			}

			if ($classname)
			{
				$drivers[] = $classname;
			}
		}, 10, 2);

		// echo directly the payment HTML as showPayment() only returns it
		add_action('vikappointments_payment_after_begin_transaction', function(&$payment, &$html)
		{
			echo $html;
		}, 10, 2);

		// manipulate response to be compliant with notifypayment task
		add_action('vikappointments_payment_after_validate_transaction', function(&$payment, &$status, &$response)
		{
			// manipulate the response to be compliant with the old payment system
			$response = [
				'verified'    => (int) $status->isVerified(),
				'tot_paid'    => $status->amount,
				'log'         => $status->log,
				'transaction' => $status->transaction,
			];
		}, 10, 3);
	}

	/**
	 * This method is used to configure the sms drivers framework.
	 * Here should be registered all the default drivers supported
	 * by the plugin.
	 *
	 * @return 	void
	 *
	 * @since 	1.2
	 */
	public static function configureSmsFramework()
	{
		// push the pre-installed drivers within the sms drivers list
		add_filter('get_supported_sms_drivers_vikappointments', function($drivers)
		{
			$list = glob(VIKAPPOINTMENTS_LIBRARIES . DIRECTORY_SEPARATOR . 'sms' . DIRECTORY_SEPARATOR . '*.php');

			return array_merge($drivers, $list);
		});

		// load sms handlers when dispatched
		add_action('load_sms_driver_vikappointments', function(&$drivers, $driver)
		{
			$classname = null;
			
			VikAppointmentsLoader::import('sms.' . $driver);

			switch ($driver)
			{
				case 'clickatell':
					$classname = 'VikAppointmentsSmsClickatell';
					break;

				case 'clicksend':
					$classname = 'VikAppointmentsSmsClicksend';
					break;

				case 'cmtelecom':
					$classname = 'VikAppointmentsSmsCmtelecom';
					break;

				case 'smshosting':
					$classname = 'VikAppointmentsSmsHosting';
					break;

				case 'tellustalk':
					$classname = 'VikAppointmentsSmsTellustalk';
					break;

				case 'whatsapp':
					$classname = 'VikAppointmentsSmsWhatsapp';
					break;
			}

			if ($classname)
			{
				$drivers[] = $classname;
			}
		}, 10, 2);
	}

	/**
	 * Registers all the widget contained within the modules folder.
	 *
	 * @return 	void
	 */
	public static function setupWidgets()
	{
		JLoader::import('adapter.module.factory');

		// load all the modules
		JModuleFactory::load(VIKAPPOINTMENTS_BASE . DIRECTORY_SEPARATOR . 'modules');

		/**
		 * Loads also the widgets to display within the
		 * admin dashboard of WordPress.
		 *
		 * @since 1.1.9
		 */
		add_action('wp_dashboard_setup', function()
		{
			JLoader::import('adapter.dashboard.admin');

			// set up folder containing the widget to load
			$path = VIKAPPOINTMENTS_LIBRARIES . DIRECTORY_SEPARATOR . 'dashboard';
			// define the classname prefix
			$prefix = 'JDashboardWidgetVikAppointments';

			try
			{
				// load and register widgets
				JDashboardAdmin::load($path, $prefix);
			}
			catch (Exception $e)
			{
				// silently suppress exception to avoid breaking the website

				if (VIKAPPOINTMENTS_DEBUG)
				{
					// propagate error in case of debug enabled
					throw $e;
				}
			}
		});
	}

	/**
	 * Configures the RSS feeds reader.
	 *
	 * @return 	JRssReader
	 *
	 * @since 	1.1.9
	 */
	public static function setupRssReader()
	{
		// autoload RSS handler class
		JLoader::import('adapter.rss.reader');

		/**
		 * Hook used to manipulate the RSS channels to which the plugin is subscribed.
		 *
		 * @param 	array    $channels  A list of RSS permalinks.
		 * @param 	boolean  $status    True to return only the published channels.
		 *
		 * @return 	array    A list of supported channels.
		 *
		 * @since 	1.1.9
		 */
		$channels = apply_filters('vikappointments_fetch_rss_channels', array(), true);

		if (VIKAPPOINTMENTS_DEBUG)
		{
			/**
			 * Filters the transient lifetime of the feed cache.
			 *
			 * @since 2.8.0
			 *
			 * @param 	integer  $lifetime  Cache duration in seconds. Default is 43200 seconds (12 hours).
			 * @param 	string   $filename  Unique identifier for the cache object.
			 */
			add_filter('wp_feed_cache_transient_lifetime', function($time, $url) use ($channels)
			{
				// in case of debug enabled, cache the feeds only for 60 seconds
				if ($url == $channels || in_array($url, $channels))
				{
					$time = 60;
				}

				return $time;
			}, 10, 2);
		}

		// instantiate RSS reader
		$rss = JRssReader::getInstance($channels, 'vikappointments');

		/**
		 * Hook used to apply some stuff before returning the RSS reader.
		 *
		 * @param 	JRssReader  &$rss  The RSS reader handler.
		 *
		 * @return 	void
		 *
		 * @since 	1.1.9
		 */
		do_action_ref_array('vikappointments_before_use_rss', array(&$rss));

		return $rss;
	}

	/**
	 * Extends the backup framework.
	 *
	 * @return 	void
	 *
	 * @since 	1.2.3
	 */
	public static function setupBackupSystem()
	{
		/**
		 * Anonymous function used to check whether the manifest includes the shortcodes import.
		 * 
		 * @param 	object  $manifest  The backup manifest.
		 * 
		 * @return 	boolean
		 */
		$hasShortcodes = function($manifest)
		{
			// look for the uninstall directive inside the manifest, which is mainly
			// used during the sample data installation
			if (isset($manifest->uninstall))
			{
				// iterate all uninstall queries
				foreach ((array) $manifest->uninstall as $query)
				{
					// look for a table that uninstall the shortcodes
					if (preg_match("/#__vikappointments_wpshortcodes\b/", $query))
					{
						return true;
					}
				}
			}

			// look for the directive containing the installation rules
			if (isset($manifest->installers))
			{
				// iterate all install rules
				foreach ((array) $manifest->installers as $rule)
				{
					// detect SQL File role
					if ($rule->role === 'sqlfile')
					{
						// check shortcodes into the file path
						$target = [$rule->data->path];
					}
					else if ($rule->role === 'sql')
					{
						// search into all the provided queries
						$target = (array) $rule->data;
					}
					else
					{
						// nothing to check
						$target = [];
					}

					foreach ($target as $tmp)
					{
						// check whether the current target mentions the shortcodes database table
						if (preg_match("/#__vikappointments_wpshortcodes\b/", $tmp))
						{
							return true;
						}
					}
				}
			}

			return false;
		};

		/**
		 * Trigger event to allow third party plugins to extend the backup import.
		 * This hook triggers before processing the import of an existing backup.
		 * 
		 * It is possible to throw an exception to prevent the import process.
		 * 
		 * Uninstalls all the pages that have been assigned to the existing shortcodes.
		 * 
		 * @param 	mixed   $status    Internal environment variable.
		 * @param 	object  $manifest  The backup manifest.
		 * @param 	string  $path      The path of the backup archive (uncompressed).
		 * 
		 * @since 	1.7.1
		 * 
		 * @throws 	Exception
		 */
		add_action('vikappointments_before_import_backup', function($status, $manifest, $path) use ($hasShortcodes)
		{
			if (!function_exists('is_plugin_active')) {
				require_once ABSPATH . 'wp-admin/includes/plugin.php';
			}

			/**
			 * Abort the backup import process in case Rank Math SEO plugin is installed and active.
			 * 
			 * @since 1.2.18
			 */
			if (is_plugin_active('seo-by-rank-math/rank-math.php')) {
				throw new Exception('The <strong>Rank Math SEO</strong> plugin appears to be installed on your website. Before proceeding with the restoration, it is necessary to deactivate this plugin. Once the data installation is complete, you will be able to re-enable it.', 409);
			}

			// check whether the manifest includes the shortcodes installation
			$manifest->shortcodes = $hasShortcodes($manifest);

			if (empty($manifest->shortcodes))
			{
				// shortcodes not included within the backup, do not uninstall
				return;
			}

			// get shortcode admin model
			$model = JModel::getInstance('vikappointments', 'shortcodes', 'admin');

			// get all existing shortcodes
			$shortcodes = $model->all(array('createdon', 'post_id'));

			// iterate all shortcodes found
			foreach ($shortcodes as $shortcode)
			{
				// make sure the shortcode has been assigned to a post
				if ($shortcode->post_id)
				{
					// get post details
					$post = get_post((int) $shortcode->post_id);

					// convert shortcode creation date
					$shortcode->createdon = JFactory::getDate($shortcode->createdon);
					// convert post creation date
					$post->post_date_gmt = JFactory::getDate($post->post_date_gmt);

					// compare ephocs and make sure the post was not created before the shortcode
					if ((int) $shortcode->createdon->format('U') <= (int) $post->post_date_gmt->format('U'))
					{
						// permanently delete post
						wp_delete_post($post->ID, $force_delete = true);
					}
				}
			}
		}, 10, 3);

		/**
		 * Trigger event to allow third party plugins to extend the backup import.
		 * This hook triggers after processing the import of an existing backup.
		 * 
		 * It is possible to throw an exception to prevent the import process.
		 * 
		 * Assigns all the newly created shortcodes to new pages.
		 * 
		 * @param 	mixed   $status    Internal environment variable.
		 * @param 	object  $manifest  The backup manifest.
		 * @param 	string  $path      The path of the backup archive (uncompressed).
		 * 
		 * @since 	1.7.1
		 * 
		 * @throws 	Exception
		 */
		add_action('vikappointments_after_import_backup', function($status, $manifest, $path)
		{
			if (empty($manifest->shortcodes))
			{
				// shortcodes not included within the backup, do not install
				return;
			}

			// get shortcodes admin model
			$listModel = JModel::getInstance('vikappointments', 'shortcodes', 'admin');

			// get all existing shortcodes
			$shortcodes = $listModel->all('id');

			// get shortcode admin model
			$model = JModel::getInstance('vikappointments', 'shortcode', 'admin');

			// iterate all shortcodes found
			foreach ($shortcodes as $shortcode)
			{
				// assign the shortcode to a new page
				$model->addPage($shortcode->id);
			}
		}, 10, 3);

		/**
		 * Trigger event to allow third party plugins to choose what are the columns to dump
		 * and whether the table should be skipped or not.
		 * 
		 * Fires while attaching a rule to dump some SQL statements.
		 * 
		 * Used to avoid dumping the post ID to which the shortcodes are attached
		 * 
		 * @param 	boolean  $include   False to avoid including the table into the backup.
		 * @param 	array    &$columns  An associative array of supported database table columns,
		 *                              where the key is the column name and the value is a nested
		 *                              array holding the column information.
		 * @param 	string   $table     The name of the database table.
		 * 
		 * @since 	1.7.1
		 */
		add_filter('vikappointments_before_backup_dump_sql', function($include, &$columns, $table)
		{
			if (is_null($include))
			{
				$include = true;
			}

			// check if we are exporting the shortcodes
			if ($table === '#__vikappointments_wpshortcodes')
			{
				// avoid dumping the post ID column
				unset($columns['post_id'], $columns['tmp_post_id']);
			}

			return $include;
		}, 10, 3);
	}

	/**
	 * Sets up the wizard.
	 *
	 * @return 	void
	 *
	 * @since 	1.2.3
	 */
	public static function setupWizard()
	{
		add_action('vikappointments_setup_wizard', function($ret, $wizard)
		{
			// include path to load additional steps
			$wizard->addIncludePath(VIKAPPOINTMENTS_LIBRARIES . DIRECTORY_SEPARATOR . 'wizard');
		}, 10, 2);

		add_action('vikappointments_after_setup_wizard', function($ret, $wizard)
		{
			// add step to manage the shortcodes
			$wizard->addStep(new VAPWizardStepShortcodes());

			// add packages and subscriptions steps as dependency
			$wizard['shortcodes']->addDependency($wizard['syspack'], $wizard['syssubscr']);

			// add step to install sample data (after taxes widget)
			$wizard->addStepAfter(new VAPWizardStepSampleData(), 'taxes');
		}, 10, 2);
	}

	/**
	 * Implements the tools needed to manage the overrides
	 * without having to use a FTP client.
	 *
	 * @return 	void
	 *
	 * @since 	1.2.13
	 */
	public static function setupOverridesManager()
	{
		// manually append fieldset to manage page overrides
		add_action('vikappointments_display_view_configapp_customizer', function($forms, $view, $setup)
		{
			if (!$forms)
			{
				// init forms array
				$forms = [];
			}

			// render configuration layout
			$html = JLayoutHelper::render('html.overrides.config', [
				'view' => $view,
			]);

			// add fieldset to forms
			$forms[__('Page Overrides', 'vikappointments')] = $html;

			// register an icon for this new fieldset
			$setup->icons[__('Page Overrides', 'vikappointments')] = 'fas fa-cut';

			return $forms;
		}, 10, 3);
	}

	/**
	 * Registers all the events used to backup the extendable files when needed.
	 *
	 * @return 	void
	 */
	public static function setupMirroring()
	{
		/**
		 * Backup all the files below before accessing the configuration page.
		 *
		 * - custom CSS
		 * - theme CSS
		 * - mail templates
		 * - mail attachments
		 * - SMS gateways
		 */
		add_action('vikappointments_before_display_editconfig', function()
		{
			// import update manager
			VikAppointmentsLoader::import('update.manager');

			try
			{
				// backup CSS themes
				VikAppointmentsUpdateManager::doBackup(
					// target to backup
					VAPBASE . '/assets/css/themes',
					// destination folder
					VAP_UPLOAD_DIR_PATH . '/css/themes'
				);

				// backup mail attachments
				VikAppointmentsUpdateManager::doBackup(
					// target to backup
					VAPMAIL_ATTACHMENTS,
					// destination folder
					VAP_UPLOAD_DIR_PATH . '/mail/attachments'
				);

				// backup mail templates
				VikAppointmentsUpdateManager::doBackup(
					// target to backup
					VAPBASE . '/helpers/mail_tmpls',
					// destination folder
					VAP_UPLOAD_DIR_PATH . '/mail/tmpl'
				);
			}
			catch (Exception $e)
			{
				// raise error and avoid breaking the flow
				JFactory::getApplication()->enqueueMessage("Impossible to complete back-up.\n" . $e->getMessage(), 'error');
			}
		});

		/**
		 * Backup all the files below before accessing the configuration page.
		 *
		 * - custom CSS
		 * - customizer
		 */
		add_action('vikappointments_before_display_editconfigapp', function()
		{
			// import update manager
			VikAppointmentsLoader::import('update.manager');

			try
			{
				// backup custom CSS file
				VikAppointmentsUpdateManager::doBackup(
					// target to backup
					VAPBASE . '/assets/css/vap-custom.css',
					// destination folder
					VAP_UPLOAD_DIR_PATH . '/css'
				);

				// backup CSS customizer
				VikAppointmentsUpdateManager::doBackup(
					// target to backup
					VAPBASE . '/assets/css/customizer',
					// destination folder
					VAP_UPLOAD_DIR_PATH . '/css/customizer'
				);
			}
			catch (Exception $e)
			{
				// raise error and avoid breaking the flow
				JFactory::getApplication()->enqueueMessage("Impossible to complete back-up.\n" . $e->getMessage(), 'error');
			}
		});

		/**
		 * Declare an anonymous function for the back-up that should be applied
		 * within the dashboard, as the default view might be different.
		 * For this reason, we should apply the back-up when visitin the
		 * dashboard, the calendar and the weekly calendar.
		 *
		 * @since 1.1.6
		 */
		$dashboard_backup = function()
		{
			// check if we are doing an AJAX request
			if (!wp_doing_ajax())
			{
				// import update manager
				VikAppointmentsLoader::import('update.manager');

				try
				{
					// backup cron jobs
					VikAppointmentsUpdateManager::doBackup(
						// target to backup
						VIKAPPOINTMENTS_BASE . '/languages',
						// destination folder
						VAP_UPLOAD_DIR_PATH . '/languages'
					);
				}
				catch (Exception $e)
				{
					// raise error and avoid breaking the flow
					JFactory::getApplication()->enqueueMessage("Impossible to complete back-up.\n" . $e->getMessage(), 'error');
				}
			}
		};

		/**
		 * Backup all the files below before accessing the dashboard page.
		 *
		 * - languages
		 */
		add_action('vikappointments_before_display_vikappointments', $dashboard_backup);
		add_action('vikappointments_before_display_calendar', $dashboard_backup);
		add_action('vikappointments_before_display_caldays', $dashboard_backup);

		/**
		 * Backup all the files below before accessing the service management page.
		 *
		 * - mail attachments
		 *
		 * @since 1.2
		 */
		add_action('vikappointments_before_display_manageservice', function()
		{
			// import update manager
			VikAppointmentsLoader::import('update.manager');

			try
			{
				// backup mail attachments
				VikAppointmentsUpdateManager::doBackup(
					// target to backup
					VAPMAIL_ATTACHMENTS,
					// destination folder
					VAP_UPLOAD_DIR_PATH . '/mail/attachments'
				);
			}
			catch (Exception $e)
			{
				// raise error and avoid breaking the flow
				JFactory::getApplication()->enqueueMessage("Impossible to complete back-up.\n" . $e->getMessage(), 'error');
			}
		});
	}
}
