/wp-content/plugins/wp-pagenavi/scb/PostMetabox.php

<?php

/**

 * Class that creates metaboxes on the post editing page.

 */

class scbPostMetabox {



	/**

	 * Metabox ID.

	 * @var string

	 */

	private $id;



	/**

	 * Title.

	 * @var string

	 */

	private $title;



	/**

	 * Post types.

	 * @var array

	 */

	private $post_types;



	/**

	 * Post meta data.

	 * @var array

	 */

	private $post_data = array();



	/**

	 * Action hooks.

	 * @var array

	 */

	protected $actions = array( 'admin_enqueue_scripts', 'post_updated_messages' );



	/**

	 * Sets up metabox.

	 *

	 * @param string $id

	 * @param string $title

	 * @param array $args (optional)

	 *

	 * @return void

	 */

	public function __construct( $id, $title, $args = array() ) {

		$this->id = $id;

		$this->title = $title;



		$args = wp_parse_args( $args, array(

			'post_type' => 'post',

			'context' => 'advanced',

			'priority' => 'default',

		) );



		if ( is_string( $args['post_type'] ) ) {

			$args['post_type'] = array( $args['post_type'] );

		}



		$this->post_types = $args['post_type'];

		$this->context = $args['context'];

		$this->priority = $args['priority'];



		add_action( 'load-post.php', array( $this, 'pre_register' ) );

		add_action( 'load-post-new.php', array( $this, 'pre_register' ) );

	}



	/**

	 * Pre register the metabox.

	 *

	 * @return void

	 */

	final public function pre_register() {

		if ( ! in_array( get_current_screen()->post_type, $this->post_types ) ) {

			return;

		}



		if ( ! $this->condition() ) {

			return;

		}



		if ( isset( $_GET['post'] ) ) {

			$this->post_data = $this->get_meta( intval( $_GET['post'] ) );

		}



		add_action( 'add_meta_boxes', array( $this, 'register' ) );

		add_action( 'save_post', array( $this, '_save_post' ), 10, 2 );



		foreach ( $this->actions as $action ) {

			if ( method_exists( $this, $action ) ) {

				add_action( $action, array( $this, $action ) );

			}

		}

	}



	/**

	 * Additional checks before registering the metabox.

	 *

	 * @return bool

	 */

	protected function condition() {

		return true;

	}



	/**

	 * Registers the metabox.

	 *

	 * @return void

	 */

	final public function register() {

		add_meta_box( $this->id, $this->title, array( $this, 'display' ), null, $this->context, $this->priority );

	}



	/**

	 * Filter data before display.

	 *

	 * @param array $form_data

	 * @param object $post

	 *

	 * @return array

	 */

	public function before_display( $form_data, $post ) {

		return $form_data;

	}



	/**

	 * Displays metabox content.

	 *

	 * @param object $post

	 *

	 * @return void

	 */

	public function display( $post ) {

		$form_fields = $this->form_fields();

		if ( ! $form_fields ) {

			return;

		}



		$form_data = $this->post_data;

		$error_fields = array();



		if ( isset( $form_data['_error_data_' . $this->id ] ) ) {

			$data = maybe_unserialize( $form_data['_error_data_' . $this->id ] );



			$error_fields = $data['fields'];

			$form_data = $data['data'];



			$this->display_notices( $data['messages'], 'error' );

		}



		$form_data = $this->before_display( $form_data, $post );



		$this->before_form( $post );

		echo $this->table( $form_fields, $form_data, $error_fields );

		$this->after_form( $post );



		delete_post_meta( $post->ID, '_error_data_' . $this->id );

	}



	/**

	 * Returns table.

	 *

	 * @param array $rows

	 * @param array $formdata

	 * @param array $errors (optional)

	 *

	 * @return string

	 */

	public function table( $rows, $formdata, $errors = array() ) {

		$output = '';

		foreach ( $rows as $row ) {

			$output .= $this->table_row( $row, $formdata, $errors );

		}



		$output = scbForms::table_wrap( $output );



		return $output;

	}



	/**

	 * Returns table row.

	 *

	 * @param array $row

	 * @param array $formdata

	 * @param array $errors (optional)

	 *

	 * @return string

	 */

	public function table_row( $row, $formdata, $errors = array() ) {

		$input = scbForms::input( $row, $formdata );



		// If row has an error, highlight it

		$style = ( in_array( $row['name'], $errors ) ) ? 'style="background-color: #FFCCCC"' : '';



		return html( 'tr',

			html( "th $style scope='row'", $row['title'] ),

			html( "td $style", $input )

		);

	}



	/**

	 * Displays notices.

	 *

	 * @param array|string $notices

	 * @param string $class (optional)

	 *

	 * @return void

	 */

	public function display_notices( $notices, $class = 'updated' ) {

		// add inline class so the notices stays in metabox

		$class .= ' inline';



		foreach ( (array) $notices as $notice ) {

			echo scb_admin_notice( $notice, $class );

		}

	}



	/**

	 * Display some extra HTML before the form.

	 *

	 * @param object $post

	 *

	 * @return void

	 */

	public function before_form( $post ) { }



	/**

	 * Return an array of form fields.

	 *

	 * @return array

	 */

	public function form_fields() {

		return array();

	}



	/**

	 * Display some extra HTML after the form.

	 *

	 * @param object $post

	 *

	 * @return void

	 */

	public function after_form( $post ) { }



	/**

	 * Makes sure that the saving occurs only for the post being edited.

	 *

	 * @param int $post_id

	 * @param object $post

	 *

	 * @return void

	 */

	final public function _save_post( $post_id, $post ) {

		if ( ! isset( $_POST['action'] ) || $_POST['action'] != 'editpost' ) {

			return;

		}



		if ( ! isset( $_POST['post_ID'] ) || $_POST['post_ID'] != $post_id ) {

			return;

		}



		if ( ! in_array( $post->post_type, $this->post_types ) ) {

			return;

		}



		$this->save( $post->ID );

	}



	/**

	 * Saves metabox form data.

	 *

	 * @param int $post_id

	 *

	 * @return void

	 */

	protected function save( $post_id ) {

		$form_fields = $this->form_fields();



		$to_update = scbForms::validate_post_data( $form_fields );



		// Filter data

		$to_update = $this->before_save( $to_update, $post_id );



		// Validate dataset

		$is_valid = $this->validate_post_data( $to_update, $post_id );

		if ( $is_valid instanceof WP_Error && $is_valid->get_error_codes() ) {



			$error_data = array(

				'fields' => $is_valid->get_error_codes(),

				'messages' => $is_valid->get_error_messages(),

				'data' => $to_update,

			);

			update_post_meta( $post_id, '_error_data_' . $this->id, $error_data );



			$location = add_query_arg( 'message', 1, get_edit_post_link( $post_id, 'url' ) );

			wp_redirect( esc_url_raw( apply_filters( 'redirect_post_location', $location, $post_id ) ) );

			exit;

		}



		foreach ( $to_update as $key => $value ) {

			update_post_meta( $post_id, $key, $value );

		}

	}



	/**

	 * Filter data before save.

	 *

	 * @param array $post_data

	 * @param int $post_id

	 *

	 * @return array

	 */

	protected function before_save( $post_data, $post_id ) {

		return $post_data;

	}



	/**

	 * Validate posted data.

	 *

	 * @param array $post_data

	 * @param int $post_id

	 *

	 * @return bool|object A WP_Error object if posted data are invalid.

	 */

	protected function validate_post_data( $post_data, $post_id ) {

		return false;

	}



	/**

	 * Returns an array of post meta.

	 *

	 * @param int $post_id

	 *

	 * @return array

	 */

	private function get_meta( $post_id ) {

		$meta = get_post_custom( $post_id );

		foreach ( $meta as $key => $values ) {

			$meta[ $key ] = maybe_unserialize( $meta[ $key ][0] );

		}



		return $meta;

	}



}