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Filename : class.xmlsf-admin.php
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<?php
/* ------------------------------
 *      XMLSF Admin CLASS
 * ------------------------------ */

class XMLSF_Admin
{
	/**
	 * Sitemaps settings
	 * @var array
	 */
	private $sitemaps = array();

	/**
	 * Static files conflicting with this plugin
	 * @var array
	 */
	public static $static_files = null;

	/**
	 * Dismissed notices array
	 * @var array
	 */
	public static $dismissed = array();

	/**
	 * CONSTRUCTOR
	 */

	function __construct()
	{
		require XMLSF_DIR . '/models/functions.admin.php';
		require XMLSF_DIR . '/controllers/class.xmlsf-admin-notices.php';

		$this->sitemaps = (array) get_option( 'xmlsf_sitemaps', array() );

		if ( isset($this->sitemaps['sitemap']) ) {
			require XMLSF_DIR . '/models/class.xmlsf-admin-sitemap-sanitize.php';
			require XMLSF_DIR . '/controllers/class.xmlsf-admin-sitemap.php';
		}

		if ( isset($this->sitemaps['sitemap-news']) ) {
			require XMLSF_DIR . '/models/class.xmlsf-admin-sitemap-news-sanitize.php';
			require XMLSF_DIR . '/controllers/class.xmlsf-admin-sitemap-news.php';
		}

		// ACTION LINK
		add_filter( 'plugin_action_links_' . XMLSF_BASENAME, 'xmlsf_add_action_link' );
		add_filter( 'plugin_row_meta', 'xmlsf_plugin_meta_links', 10, 2);

		add_action( 'admin_init', array( $this, 'notices_actions' ) );
		add_action( 'admin_init', array( $this, 'transients_actions' ) );
		add_action( 'admin_init', array( $this, 'register_settings' ), 0 );

		// ACTIONS & CHECKS
		add_action( 'admin_init', array( $this, 'tools_actions' ) );
		add_action( 'admin_init', array( $this, 'static_files' ) );
		add_action( 'admin_init', array( $this, 'check_theme_conflicts' ) );
	}

	/**
	* SETTINGS
	*/

	/**
	 * Register settings and add settings fields
	 */

	public function register_settings()
	{
		// sitemaps
		register_setting( 'reading', 'xmlsf_sitemaps', array('XMLSF_Admin_Sanitize','sitemaps_settings') );
		add_settings_field( 'xmlsf_sitemaps', __('Enable XML sitemaps','xml-sitemap-feed'), array($this,'sitemaps_settings_field'), 'reading' );

		// custom domains, only when any sitemap is active
		if ( isset($this->sitemaps['sitemap']) || isset($this->sitemaps['sitemap-news']) ) {
			register_setting( 'reading', 'xmlsf_domains', array('XMLSF_Admin_Sanitize','domains_settings') );
			add_settings_field( 'xmlsf_domains', __('Allowed domains','xml-sitemap-feed'), array($this,'domains_settings_field'), 'reading' );
		}

		// help tab
		add_action( 'load-options-reading.php', array($this,'xml_sitemaps_help') );

		// robots rules, only when permalinks are set
		$rules = get_option( 'rewrite_rules' );
		if( ! xmlsf()->plain_permalinks() && isset( $rules['robots\.txt$'] ) ) {
			register_setting( 'reading', 'xmlsf_robots', array('XMLSF_Admin_Sanitize','robots_settings') );
			add_settings_field( 'xmlsf_robots', __('Additional robots.txt rules','xml-sitemap-feed'), array($this,'robots_settings_field'), 'reading' );
		}

		// ping, only when any sitemap is active
		if ( isset($this->sitemaps['sitemap']) || isset($this->sitemaps['sitemap-news']) ) {
			register_setting( 'writing', 'xmlsf_ping', array('XMLSF_Admin_Sanitize','ping_settings') );
			add_settings_field( 'xmlsf_ping', __('Ping Services','xml-sitemap-feed'), array($this,'ping_settings_field'), 'writing' );
			add_action( 'load-options-writing.php', array($this,'ping_settings_help') );
		}
	}

	/* SITEMAPS */

	public function xml_sitemaps_help()
	{
		ob_start();
		include XMLSF_DIR . '/views/admin/help-tab-sitemaps.php';
		include XMLSF_DIR . '/views/admin/help-tab-support.php';
		$content = ob_get_clean();

		get_current_screen()->add_help_tab( array(
			'id'      => 'sitemap-settings',
			'title'   => __( 'Enable XML sitemaps', 'xml-sitemap-feed' ),
			'content' => $content,
			'priority' => 11
		) );

		ob_start();
		include XMLSF_DIR . '/views/admin/help-tab-allowed-domains.php';
		include XMLSF_DIR . '/views/admin/help-tab-support.php';
		$content = ob_get_clean();

		get_current_screen()->add_help_tab( array(
			'id'      => 'allowed-domains',
			'title'   =>__( 'Allowed domains', 'xml-sitemap-feed' ),
			'content' => $content,
			'priority' => 11
		) );

		ob_start();
		include XMLSF_DIR . '/views/admin/help-tab-robots.php';
		include XMLSF_DIR . '/views/admin/help-tab-support.php';
		$content = ob_get_clean();

		get_current_screen()->add_help_tab( array(
			'id'      => 'robots',
			'title'   => __( 'Additional robots.txt rules', 'xml-sitemap-feed' ),
			'content' => $content,
			'priority' => 11
		) );
	}

	/**
	 * Sitemap settings fields
	 */

	public function sitemaps_settings_field()
	{
		if ( 1 == get_option('blog_public') ) :

			// The actual fields for data entry
			include XMLSF_DIR . '/views/admin/field-sitemaps.php';

		else :

			_e( 'XML Sitemaps are not available because of your site&#8217;s visibility settings (above).', 'xml-sitemap-feed' );

		endif;
	}

	/**
	 * Domain settings field
	 */

	public function domains_settings_field()
	{
		$domains = get_option( 'xmlsf_domains' );
		if ( !is_array($domains) ) $domains = array();

		// The actual fields for data entry
		include XMLSF_DIR . '/views/admin/field-sitemap-domains.php';
	}

	/* ROBOTS */

	public function robots_settings_field()
	{
		// The actual fields for data entry
		include XMLSF_DIR . '/views/admin/field-robots.php';
	}

	/* PING SETTINGS */

	public function ping_settings_help()
	{
		ob_start();
		include XMLSF_DIR . '/views/admin/help-tab-ping.php';
		include XMLSF_DIR . '/views/admin/help-tab-support.php';
		$content = ob_get_clean();

		get_current_screen()->add_help_tab( array(
			'id'      => 'ping-services',
			'title'   => __( 'Ping Services', 'xml-sitemap-feed' ),
			'content' => $content,
			'priority' => 11
		) );
	}

	public function ping_settings_field()
	{
		$options = get_option( 'xmlsf_ping' );

		// The actual fields for data entry
		include XMLSF_DIR . '/views/admin/field-ping.php';
	}

	/**
	 * Clear settings
	 */
	public function clear_settings( $sitemap = '' )
	{
		$defaults = 'sitemap-news' == $sitemap ? array(
			'news_tags' => xmlsf()->default_news_tags
		) : xmlsf()->defaults();

		unset( $defaults['sitemaps'] );

		foreach ( $defaults as $option => $settings ) {
			update_option( 'xmlsf_' . $option, $settings );
		}

		delete_transient( 'xmlsf_static_files' );

		add_settings_error( 'notice_clear_settings', 'notice_clear_settings', __('Settings reset to the plugin defaults.','xml-sitemap-feed'), 'updated' );
	}

	/**
	 * Delete static sitemap files
	 */

	public function delete_static_files()
	{
		if ( empty($_POST['xmlsf-delete']) ) {
			add_settings_error( 'static_files', 'none_selected', __('No files selected for deletion!','xml-sitemap-feed'), 'notice-warning' );
			return;
		}

		$allowed_files = array('sitemap.xml','sitemap-news.xml','robots.txt');

		$this->static_files();

		foreach ( $_POST['xmlsf-delete'] as $name ) {
			if ( !in_array($name,$allowed_files) ) {
				unset(self::$static_files[$name]);
				add_settings_error( 'static_files', 'file_not_allowed', sprintf( /* Translators: static file name */ __('File %s not in the list of allowed files!','xml-sitemap-feed'), '<em>' . $name . '</em>' ) );
				continue;
			}
			if ( !isset(self::$static_files[$name]) ) {
				// do nothing and be quiet about it...
				continue;
			}
			if ( unlink(self::$static_files[$name]) ) {
				unset(self::$static_files[$name]);
				add_settings_error( 'static_files', 'file_deleted_'.$name, sprintf( /* Translators: static file name */ __('Static file %s succesfully deleted.','xml-sitemap-feed'), '<em>' . $name . '</em>' ), 'updated' );
			} else {
				add_settings_error( 'static_files', 'file_failed_'.$name,
					sprintf( /* Translators: static file name */ __('Static file %s deletion failed.','xml-sitemap-feed'), '<em>' . $name . '</em>' ) . ' ' . sprintf( /* Translators: static file full path and name */ __('This is probably due to insufficient rights. Please try to remove %s manually via FTP or your hosting provider control panel.','xml-sitemap-feed'), self::$static_files[$name] )
				);
			}
		}

		$this->check_static_files();
	}

	/**
	 * Check for static sitemap files
	 */
	public function static_files()
	{
		if ( ( is_multisite() && ! is_super_admin() ) || ! current_user_can( 'manage_options' ) ) return;

		if ( null === self::$static_files )
			self::$static_files = get_transient( 'xmlsf_static_files' );

		if ( !empty(self::$static_files) && !in_array( 'static_files', self::$dismissed ) ) {
			add_action( 'admin_notices', array( 'XMLSF_Admin_Notices', 'notice_static_files' ) );
		}
	}

	/**
	 * Check for static sitemap files
	 */
	public function check_static_files()
	{
		$home_path = trailingslashit( get_home_path() );
		self::$static_files = array();
		$check_for = $this->sitemaps;
		if ( get_option('xmlsf_robots') ) {
			$check_for['robots'] = 'robots.txt';
		}

		foreach ( $check_for as $name => $pretty ) {
			if ( ! empty( $pretty ) && file_exists( $home_path . $pretty ) ) {
				self::$static_files[$pretty] = $home_path . $pretty;
			}
		}

		if ( !empty( self::$static_files ) ) {
			set_transient( 'xmlsf_static_files', self::$static_files );
		} else {
			delete_transient( 'xmlsf_static_files' );
		}
	}

	/**
	 * Check for conflicting themes and their settings
	 */

	public function check_theme_conflicts()
	{
		// Catch Box Pro feed redirect
		if ( !in_array( 'catchbox_feed_redirect', self::$dismissed ) && function_exists( 'catchbox_is_feed_url_present' ) && catchbox_is_feed_url_present(null) ) {
			add_action( 'admin_notices', array( 'XMLSF_Admin_Notices', 'notice_catchbox_feed_redirect' ) );
		}
	}

	public function tools_actions()
	{
		if ( isset( $_POST['xmlsf-clear-settings-submit'] ) && isset( $_POST['xmlsf-clear-settings'] ) ) {
			if ( xmlsf_verify_nonce('help') ) {
				$this->clear_settings( $_POST['xmlsf-clear-settings'] );
			}
		}

		if ( isset( $_POST['xmlsf-delete-submit'] ) ) {
			if ( xmlsf_verify_nonce('help') ) {
				$this->delete_static_files();
			}
		}

		if ( isset( $_POST['xmlsf-check-conflicts'] ) ) {
			if ( xmlsf_verify_nonce('help') ) {
				// reset ignored warnings
				delete_user_meta( get_current_user_id(), 'xmlsf_dismissed' );
				self::$dismissed = array();

				$this->check_static_files();
				if ( empty( self::$static_files ) )
					add_settings_error( 'static_files_notice', 'static_files', __('No conflicting static files found.','xml-sitemap-feed'), 'notice-info');
			}
		}

		if ( isset( $_POST['xmlsf-flush-rewrite-rules'] ) ) {
			if ( xmlsf_verify_nonce('help') ) {
				// flush rewrite rules
				flush_rewrite_rules();
				add_settings_error( 'flush_admin_notice', 'flush_admin_notice', __('WordPress rewrite rules have been flushed.','xml-sitemap-feed'), 'updated' );
			}
		}

		if ( isset( $_POST['xmlsf-clear-term-meta'] ) ) {
			if ( xmlsf_verify_nonce('help') ) {
				// remove metadata
				global $wpdb;
		  	// terms meta
		  	$wpdb->delete( $wpdb->prefix.'termmeta', array( 'meta_key' => 'term_modified' ) );
				add_settings_error( 'clear_meta_notice', 'clear_meta_notice', __('Sitemap term meta cache has been cleared.','xml-sitemap-feed'), 'updated' );
			}
		}

		if ( isset( $_POST['xmlsf-clear-post-meta'] ) ) {
			if ( xmlsf_verify_nonce('help') ) {
				// remove metadata
				global $wpdb;
				// images meta
		  	$wpdb->delete( $wpdb->prefix.'postmeta', array( 'meta_key' => '_xmlsf_image_attached' ) );
		  	$wpdb->delete( $wpdb->prefix.'postmeta', array( 'meta_key' => '_xmlsf_image_featured' ) );
				update_option( 'xmlsf_images_meta_primed', array() );
				// comments meta
		    $wpdb->delete( $wpdb->prefix.'postmeta', array( 'meta_key' => '_xmlsf_comment_date' ) );
				update_option( 'xmlsf_comments_meta_primed', array() );

				add_settings_error( 'clear_meta_notice', 'clear_meta_notice', __('Sitemap post meta caches have been cleared.','xml-sitemap-feed'), 'updated' );
			}
		}

	}

	public function notices_actions()
	{
		self::$dismissed = (array) get_user_meta( get_current_user_id(), 'xmlsf_dismissed' );

		if ( isset( $_POST['xmlsf-dismiss-submit'] ) && isset( $_POST['xmlsf-dismiss'] ) ) {
			if ( xmlsf_verify_nonce('notice') ) {
				add_user_meta( get_current_user_id(), 'xmlsf_dismissed', $_POST['xmlsf-dismiss'], false );
				self::$dismissed[] = $_POST['xmlsf-dismiss'];
			}
		}
	}

	public function transients_actions()
	{
		// CATCH TRANSIENT for flushing rewrite rules after the sitemaps setting has changed
		delete_transient('xmlsf_flush_rewrite_rules') && flush_rewrite_rules();

		// CATCH TRANSIENT for static file check
		delete_transient('xmlsf_check_static_files') && $this->check_static_files();
	}

}

new XMLSF_Admin();