<?php

if (!defined('WPO_PLUGIN_MAIN_PATH')) die('No direct access allowed');

/**
 * All commands that are intended to be available for calling from any sort of control interface (e.g. wp-admin, UpdraftCentral) go in here. All public methods should either return the data to be returned, or a WP_Error with associated error code, message and error data.
 */
class WP_Optimize_Commands {

	private $optimizer;

	private $options;

	private $wpo_sites; // used in get_optimizations_info command.

	public function __construct() {
		$this->optimizer = WP_Optimize()->get_optimizer();
		$this->options = WP_Optimize()->get_options();
	}

	public function get_version() {
		return WPO_VERSION;
	}

	public function enable_or_disable_feature($data) {
	
		$type = (string) $data['type'];
		$enable = (boolean) $data['enable'];
	
		$options = array($type => $enable);

		return $this->optimizer->trackback_comment_actions($options);
	}
	
	public function save_manual_run_optimization_options($sent_options) {
		return $this->options->save_sent_manual_run_optimization_options($sent_options);
	}

	public function get_status_box_contents() {
		return WP_Optimize()->include_template('database/status-box-contents.php', true, array('optimize_db' => false));
	}

	/**
	 * Get the database tabs information.
	 *
	 * @return string auto cleanup content.
	 */
	public function get_settings_auto_cleanup_contents() {
		return WP_Optimize()->include_template('database/settings-auto-cleanup.php', true, array('optimize_db' => false, 'show_innodb_option' => WP_Optimize()->template_should_include_data() && $this->optimizer->show_innodb_force_optimize()));
	}

	/**
	 * Get the settings tab information.
	 *
	 * @return string logging settings content.
	 */
	public function get_logging_settings_contents() {
		return WP_Optimize()->include_template('settings/settings-logging.php', true, array('optimize_db' => false));
	}
	
	/**
	 * Get the database tabs information
	 *
	 * @return string database table optimization rendered content
	 */
	public function get_optimizations_table() {
		return WP_Optimize()->include_template('database/optimizations-table.php', true, array('does_server_allows_table_optimization' => WP_Optimize()->does_server_allows_table_optimization()));
	}

	/**
	 * Pulls and return the "WP Optimize" template contents. Primarily used for UpdraftCentral
	 * content display through ajax request.
	 *
	 * @return array An array containing the WPO translations and the "WP Optimize" tab's rendered contents
	 */
	public function get_wp_optimize_contents() {
		$content = WP_Optimize()->include_template('database/optimize-table.php', true, array('optimize_db' => false, 'load_data' => WP_Optimize()->template_should_include_data(), 'does_server_allows_table_optimization' => WP_Optimize()->does_server_allows_table_optimization()));
		if (WP_Optimize()->is_updraft_central_request()) {
			$content .= $this->get_status_box_contents();
		}

		return array(
			'content' => $content,
			'translations' => $this->get_js_translation()
		);
	}

	/**
	 * Pulls and return the "Table Information" template contents. Primarily used for UpdraftCentral
	 * content display through ajax request.
	 *
	 * @return array An array containing the WPO translations and the "Table Information" tab's rendered contents
	 */
	public function get_table_information_contents() {
		$content = WP_Optimize()->include_template('database/tables.php', true, array('optimize_db' => false, 'load_data' => WP_Optimize()->template_should_include_data()));

		return array(
			'content' => $content,
			'translations' => $this->get_js_translation()
		);
	}

	/**
	 * Pulls and return the "Settings" template contents. Primarily used for UpdraftCentral
	 * content display through ajax request.
	 *
	 * @return array An array containing the WPO translations and the "Settings" tab's rendered contents
	 */
	public function get_settings_contents() {
		$admin_settings = '<form action="#" method="post" enctype="multipart/form-data" name="settings_form" id="settings_form">';
		$admin_settings .= WP_Optimize()->include_template('database/settings-general.php', true, array('optimize_db' => false));
		$admin_settings .= WP_Optimize()->include_template('database/settings-auto-cleanup.php', true, array('optimize_db' => false, 'show_innodb_option' => WP_Optimize()->template_should_include_data() && $this->optimizer->show_innodb_force_optimize()));
		$admin_settings .= WP_Optimize()->include_template('settings/settings-logging.php', true, array('optimize_db' => false));
		$admin_settings .= '<input id="wp-optimize-settings-save" class="button button-primary" type="submit" name="wp-optimize-settings" value="' . esc_attr('Save settings', 'wp-optimize') .'" />';
		$admin_settings .= '</form>';
		$admin_settings .= WP_Optimize()->include_template('settings/settings-trackback-and-comments.php', true, array('optimize_db' => false));
		$content = $admin_settings;

		return array(
			'content' => $content,
			'translations' => $this->get_js_translation()
		);
	}

	/**
	 * Returns array of translations used by the WPO plugin. Primarily used for UpdraftCentral
	 * consumption.
	 *
	 * @return array The WPO translations
	 */
	public function get_js_translation() {
		$translations = WP_Optimize()->wpo_js_translations();

		// Make sure that we include the loggers classes info whenever applicable before
		// returning the translations to UpdraftCentral.
		if (is_callable(array(WP_Optimize(), 'get_loggers_classes_info'))) {
			$translations['loggers_classes_info'] = WP_Optimize()->get_loggers_classes_info();
		}

		return $translations;
	}

	/**
	 * Save settings command.
	 *
	 * @param string $data
	 * @return array
	 */
	public function save_settings($data) {
		
		parse_str(stripslashes($data), $posted_settings);

		$saved_settings = $this->options->save_settings($posted_settings);
		// We now have $posted_settings as an array.
		return array(
			'save_results' => $saved_settings,
			'status_box_contents' => $this->get_status_box_contents(),
			'optimizations_table' => $this->get_optimizations_table(),
			'settings_auto_cleanup_contents' => $this->get_settings_auto_cleanup_contents(),
			'logging_settings_contents' => $this->get_logging_settings_contents(),
		);
	}

	/**
	 * Wipe settings command.
	 *
	 * @return bool|false|int
	 */
	public function wipe_settings() {
		return $this->options->wipe_settings();
	}

	/**
	 * Save lazy load settings.
	 *
	 * @param string $data
	 * @return array
	 */
	public function save_lazy_load_settings($data) {
		parse_str(stripslashes($data), $posted_settings);

		return array(
			'save_result' => $this->options->save_lazy_load_settings($posted_settings)
		);
	}

	/**
	 * This sends the selected tick value over to the save function
	 * within class-wp-optimize-options.php
	 *
	 * @param  array $data An array of data that includes true or false for click option.
	 * @return array
	 */
	public function save_auto_backup_option($data) {
		return array('save_auto_backup_option' => $this->options->save_auto_backup_option($data));
	}

	/**
	 * Save option which sites to optimize in multisite mode.
	 *
	 * @param array $data Array of settings.
	 * @return bool
	 */
	public function save_site_settings($data) {
		return $this->options->save_wpo_sites_option($data['wpo-sites']);
	}

	/**
	 * Perform the requested optimization
	 *
	 * @param  array $params Should have keys 'optimization_id' and 'data'.
	 * @return array
	 */
	public function do_optimization($params) {
		
		if (!isset($params['optimization_id'])) {
			$results = array(
				'result' => false,
				'messages' => array(),
				'errors' => array(
					__('No optimization was indicated.', 'wp-optimize')
				)
			);
		} else {
			$optimization_id = $params['optimization_id'];
			$data = isset($params['data']) ? $params['data'] : array();
			$include_ui_elements = isset($data['include_ui_elements']) ? $data['include_ui_elements'] : false;
			
			$optimization = $this->optimizer->get_optimization($optimization_id, $data);
	
			$result = is_a($optimization, 'WP_Optimization') ? $optimization->do_optimization() : null;

			$results = array(
				'result' => $result,
				'messages' => array(),
				'errors' => array(),
			);

			if ($include_ui_elements) {
				$results['status_box_contents'] = $this->get_status_box_contents();
			}
			
			if (is_wp_error($optimization)) {
				$results['errors'][] = $optimization->get_error_message().' ('.$optimization->get_error_code().')';
			}
			
			if ($include_ui_elements && $optimization->get_changes_table_data()) {
				$table_list = $this->get_table_list();
				$results['table_list'] = $table_list['table_list'];
				$results['total_size'] = $table_list['total_size'];
			}
		}
		return $results;
	}

	/**
	 * Preview command, used to show information about data should be optimized in popup tool.
	 *
	 * @param array $params Should have keys 'optimization_id', 'offset' and 'limit'.
	 *
	 * @return array
	 */
	public function preview($params) {
		if (!isset($params['optimization_id'])) {
			$results = array(
				'result' => false,
				'messages' => array(),
				'errors' => array(
					__('No optimization was indicated.', 'wp-optimize')
				)
			);
		} else {
			$optimization_id = $params['optimization_id'];
			$data = isset($params['data']) ? $params['data'] : array();
			$params['offset'] = isset($params['offset']) ? (int) $params['offset'] : 0;
			$params['limit'] = isset($params['limit']) ? (int) $params['limit'] : 50;

			$optimization = $this->optimizer->get_optimization($optimization_id, $data);

			if (is_a($optimization, 'WP_Optimization')) {
				if (isset($params['site_id'])) {
					$optimization->switch_to_blog((int) $params['site_id']);
				}
				$result = $optimization->preview($params);
			} else {
				$result = null;
			}

			$results = array(
				'result' => $result,
				'messages' => array(),
				'errors' => array()
			);
		}

		return $results;
	}

	/**
	 * Get information about requested optimization.
	 *
	 * @param array $params Should have keys 'optimization_id' and 'data'.
	 * @return array
	 */
	public function get_optimization_info($params) {
		if (!isset($params['optimization_id'])) {
			$results = array(
				'result' => false,
				'messages' => array(),
				'errors' => array(
					__('No optimization was indicated.', 'wp-optimize')
				)
			);
		} else {
			$optimization_id = $params['optimization_id'];
			$data = isset($params['data']) ? $params['data'] : array();
			$include_ui_elements = isset($data['include_ui_elements']) ? $data['include_ui_elements'] : false;

			$optimization = $this->optimizer->get_optimization($optimization_id, $data);
			$result = is_a($optimization, 'WP_Optimization') ? $optimization->get_optimization_info() : null;

			$results = array(
				'result' => $result,
				'messages' => array(),
				'errors' => array(),
			);

			if ($include_ui_elements) {
				$results['status_box_contents'] = $this->get_status_box_contents();
			}
		}

		return $results;
	}

	/**
	 * Get the data for the tables tab
	 *
	 * @param array $data
	 * @return array
	 */
	public function get_table_list($data = array()) {
		if (isset($data['refresh_plugin_json']) && filter_var($data['refresh_plugin_json'], FILTER_VALIDATE_BOOLEAN)) WP_Optimize()->get_db_info()->update_plugin_json();

		$size = $this->optimizer->get_current_db_size();
	
		return apply_filters('wpo_get_tables_data', array(
			'table_list' => WP_Optimize()->include_template('database/tables-body.php', true, array('optimize_db' => false)),
			'total_size' => $size[0]
		));
	}

	/**
	 * Get the database tabs information
	 *
	 * @return array
	 */
	public function get_database_tabs() {
		return array_merge(array('optimizations' => $this->get_optimizations_table(), 'does_server_allows_table_optimization' => WP_Optimize()->does_server_allows_table_optimization()), $this->get_table_list());
	}

	/**
	 * Do action wp_optimize_after_optimizations
	 * used in ajax request after all optimizations completed
	 *
	 * @return boolean
	 */
	public function optimizations_done() {

		$this->options->update_option('total-cleaned', 0);
		// Run action after all optimizations completed.
		do_action('wp_optimize_after_optimizations');

		return true;
	}

	/**
	 * Return information about all optimizations.
	 *
	 * @param  array $params
	 * @return array
	 */
	public function get_optimizations_info($params) {
		$this->wpo_sites = isset($params['wpo-sites']) ? $params['wpo-sites'] : 0;

		add_filter('get_optimization_blogs', array($this, 'get_optimization_blogs_filter'));

		$results = array();
		$optimizations = $this->optimizer->get_optimizations();

		foreach ($optimizations as $optimization_id => $optimization) {
			if (false === $optimization->display_in_optimizations_list()) continue;

			$results[$optimization_id] = $optimization->get_settings_html();
		}

		return $results;
	}

	/**
	 * Filter for get_optimizations_blogs function, used in get_optimizations_info command.
	 * Not intended for direct usage as a command (is used internally as a WP filter)
	 *
	 * The class variable $wpo_sites is used for performing the filtering.
	 *
	 * @param array $sites - unfiltered list of sites
	 * @return array - after filtering
	 */
	public function get_optimization_blogs_filter($sites) {
		$sites = array();

		if (!empty($this->wpo_sites)) {
			foreach ($this->wpo_sites as $site) {
				if ('all' !== $site) $sites[] = $site;
			}
		}

		return $sites;
	}

	/**
	 * Checks overdue crons and return message
	 */
	public function check_overdue_crons() {
		$overdue_crons = WP_Optimize()->howmany_overdue_crons();

		if ($overdue_crons >= 4) {
			return array('m' => WP_Optimize()->show_admin_warning_overdue_crons($overdue_crons));
		}
	}

	/**
	 * Enable or disable Gzip compression.
	 *
	 * @param array $params - ['enable' => true|false]
	 * @return array
	 */
	public function enable_gzip_compression($params) {
		return WP_Optimize()->get_gzip_compression()->enable_gzip_command_handler($params);
	}

	/**
	 * Get the current gzip compression status
	 *
	 * @return array
	 */
	public function get_gzip_compression_status() {
		$status = WP_Optimize()->get_gzip_compression()->is_gzip_compression_enabled(true);
		return is_wp_error($status) ? array('error' => __('We could not determine if Gzip compression is enabled.', 'wp-optimize'), 'code' => $status->get_error_code(), 'message' => $status->get_error_message()) : array('status' => $status);
	}

	/**
	 * Import WP-Optimize settings.
	 *
	 * @param array $params array with 'settings' item where 'settings' json-encoded string.
	 *
	 * @return Array - the results of the import operation
	 */
	public function import_settings($params) {
		if (empty($params['settings'])) {
			return array('errors' => array(__('Please upload a valid settings file.', 'wp-optimize')));
		}

		$settings = json_decode($params['settings'], true);

		// check if valid json file posted (requires PHP 5.3+)
		if ((function_exists('json_last_error') && 0 != json_last_error()) || empty($settings)) {
			return array('errors' => array(__('Please upload a valid settings file.', 'wp-optimize')));
		}

		$cache_settings = $settings['cache_settings'];
		$minify_settings = $settings['minify_settings'];
		$smush_settings = $settings['smush_settings'];
		$database_settings = $settings['database_settings'];

		$cache = WP_Optimize()->get_page_cache();
		$cache->create_folders();
		if ($cache_settings['enable_page_caching']) {
			$cache->enable();
		}

		$wpo_browser_cache = WP_Optimize()->get_browser_cache();
		if (isset($cache_settings['enable_browser_cache']) && $cache_settings['enable_browser_cache']) {
			$browser_cache = array(
				'browser_cache_expire_days' => $cache_settings['browser_cache_expire_days'],
				'browser_cache_expire_hours' => $cache_settings['browser_cache_expire_hours']
			);
			$wpo_browser_cache->enable_browser_cache_command_handler($browser_cache);
		}

		$message = '';
		$cache_result = WP_Optimize()->get_page_cache()->config->update($cache_settings);
		$minify_result = WP_Optimize()->get_minify()->minify_commands->save_minify_settings($minify_settings);
		$smush_result = WP_Optimize()->get_task_manager()->commands->update_smush_options($smush_settings);
		$this->save_settings($database_settings);

		if (is_wp_error($cache_result)) {
			$message .= $cache_result->get_error_message() . PHP_EOL;
		}

		if (!$minify_result['success']) {
			$message .= isset($minify_result['message']) ? $minify_result['message'] . PHP_EOL : '';
			$message .= isset($minify_result['error']) ? $minify_result['error'] . PHP_EOL : '';
		}

		if (is_wp_error($smush_result)) {
			$message .= $smush_result->get_error_message() . PHP_EOL;
		}

		return array(
			'success' => true,
			'message' => empty($message) ? __('The settings were imported successfully.', 'wp-optimize') : $message
		);
	}

	/**
	 * Dismiss install or updated notice
	 *
	 * @return mixed
	 */
	public function dismiss_install_or_update_notice() {
		if (!is_a(WP_Optimize()->get_install_or_update_notice(), 'WP_Optimize_Install_Or_Update_Notice') || !is_callable(array(WP_Optimize()->get_install_or_update_notice(), 'dismiss'))) {
			return array('errors' => array('The notice could not be dismissed. The method "dismiss" on the object instance "install_or_update_notice" does not seem to exist.'));
		}

		if (!WP_Optimize()->get_install_or_update_notice()->dismiss()) {
			return array('errors' => array('The notice could not be dismissed. The settings could not be updated'));
		}

		return true;
	}

	/**
	 * Run images trash command.
	 */
	public function images_trash_command($params) {
		if (!class_exists('WP_Optimize_Images_Trash_Manager_Commands')) {
			return array(
				'errors' => array('WP_Optimize_Images_Trash_Manager_Commands class not found'),
			);
		}

		// get posted command.
		$trash_command = isset($params['images_trash_command']) ? $params['images_trash_command'] : '';
		// check if command is allowed.
		$allowed_commands = WP_Optimize_Images_Trash_Manager_Commands::get_allowed_ajax_commands();

		if (!in_array($trash_command, $allowed_commands)) {
			return array(
				'errors' => array('No such command found'),
			);
		}

		$results = call_user_func(array(WP_Optimize_Images_Trash_Manager()->commands, $trash_command), $params);

		if (is_wp_error($results)) {
			$results = array(
				'errors' => array($results->get_error_message()),
			);
		}

		return $results;
	}

	/**
	 * Power tweak handling
	 *
	 * @param array $params
	 * @return mixed
	 */
	public function power_tweak($params) {
		global $wp_optimize_premium;
		if (!is_a($wp_optimize_premium, 'WP_Optimize_Premium') || !property_exists($wp_optimize_premium, 'power_tweaks') || !isset($params['sub_action'])) return array(
			'errors' => array(__('No such command found', 'wp-optimize')),
		);
		
		$action = $params['sub_action'];
		$data = $params['data'] ? $params['data'] : array();
		if (!isset($data['tweak'])) return array(
			'errors' => array(__('No tweak provided', 'wp-optimize'))
		);

		$tweak = sanitize_title($data['tweak']);
		$pt = $wp_optimize_premium->power_tweaks;
		switch($action) {
			case 'activate':
				$result = $pt->activate($tweak);
				break;
			case 'deactivate':
				$result = $pt->deactivate($tweak);
				break;
			case 'run':
				$result = $pt->run($tweak);
				break;
		}
		if ($result && !is_wp_error($result)) {
			return is_array($result) ? array_merge(array('success' => true), $result) : array('success' => true, 'message' => $result);
		} else {
			$error_message = is_wp_error($result) ? $result->get_error_message() : sprintf(__('The command %s failed', 'wp-optimize'), $action);
			return array(
				'success' => false,
				'errors' => array($error_message)
			);
		}
	}
	
	/**
	 * Ignores the table delete warning for the current user
	 *
	 * @return boolean
	 */
	public function user_ignores_table_delete_warning() {
		return array(
			'success' => update_user_meta(get_current_user_id(), 'wpo-ignores-table-delete-warning', true)
		);
	}

	/**
	 * Exports unused images as a CSV file to the `uploads` folder
	 *
	 * @return array
	 */
	public function export_csv() {
		WP_Optimization_images::instance()->output_csv();
		return array(
			'success' => true
		);
	}
}