<?php
// Prevent loading this file directly
defined( 'ABSPATH' ) || exit;
// Meta Box Class
if ( ! class_exists( 'RW_Meta_Box' ) )
{
/**
* A class to rapid develop meta boxes for custom & built in content types
* Piggybacks on WordPress
*
* @author Rilwis
* @author Co-Authors @see https://github.com/rilwis/meta-box
* @license GNU GPL2+
* @package RW Meta Box
*/
class RW_Meta_Box
{
/**
* @var array Meta box information
*/
public $meta_box;
/**
* @var array Fields information
*/
public $fields;
/**
* @var array Contains all field types of current meta box
*/
public $types;
/**
* @var array Validation information
*/
public $validation;
public $saved = false;
/**
* Create meta box based on given data
*
* @see demo/demo.php file for details
*
* @param array $meta_box Meta box definition
*
* @return RW_Meta_Box
*/
function __construct( $meta_box )
{
// Run script only in admin area
if ( ! is_admin() )
return;
// Assign meta box values to local variables and add it's missed values
$this->meta_box = self::normalize( $meta_box );
$this->fields = &$this->meta_box['fields'];
$this->validation = &$this->meta_box['validation'];
// Allow users to show/hide meta box
// 1st action applies to all meta boxes
// 2nd action applies to only current meta box
$show = true;
$show = apply_filters( 'rwmb_show', $show, $this->meta_box );
$show = apply_filters( "rwmb_show_{$this->meta_box['id']}", $show, $this->meta_box );
if ( !$show )
return;
// Enqueue common styles and scripts
add_action( 'admin_enqueue_scripts', array( $this, 'admin_enqueue_scripts' ) );
// Add additional actions for fields
$fields = self::get_fields( $this->fields );
foreach ( $fields as $field )
{
call_user_func( array( self::get_class_name( $field ), 'add_actions' ) );
}
// Add meta box
add_action( 'add_meta_boxes', array( $this, 'add_meta_boxes' ) );
// Hide meta box if it's set 'default_hidden'
add_filter( 'default_hidden_meta_boxes', array( $this, 'hide' ), 10, 2 );
// Save post meta
add_action( 'save_post', array( $this, 'save_post' ) );
// Attachment uses other hooks
// @see wp_update_post(), wp_insert_attachment()
add_action( 'edit_attachment', array( $this, 'save_post' ) );
add_action( 'add_attachment', array( $this, 'save_post' ) );
}
/**
* Enqueue common styles
*
* @return void
*/
function admin_enqueue_scripts()
{
$screen = get_current_screen();
// Enqueue scripts and styles for registered pages (post types) only
if ( 'post' != $screen->base || ! in_array( $screen->post_type, $this->meta_box['pages'] ) )
return;
wp_enqueue_style( 'harvest', RWMB_CSS_URL . 'style.css', array(), RWMB_VER );
// Load clone script conditionally
$has_clone = false;
$fields = self::get_fields( $this->fields );
foreach ( $fields as $field )
{
if ( $field['clone'] )
$has_clone = true;
// Enqueue scripts and styles for fields
call_user_func( array( self::get_class_name( $field ), 'admin_enqueue_scripts' ) );
}
if ( $has_clone )
wp_enqueue_script( 'rwmb-clone', RWMB_JS_URL . 'clone.js', array( 'jquery' ), RWMB_VER, true );
if ( $this->validation )
{
wp_enqueue_script( 'jquery-validate', RWMB_JS_URL . 'jquery.validate.min.js', array( 'jquery' ), RWMB_VER, true );
wp_enqueue_script( 'rwmb-validate', RWMB_JS_URL . 'validate.js', array( 'jquery-validate' ), RWMB_VER, true );
}
// Auto save
if ( $this->meta_box['autosave'] )
wp_enqueue_script( 'rwmb-autosave', RWMB_JS_URL . 'autosave.js', array( 'jquery' ), RWMB_VER, true );
}
/**
* Get all fields of a meta box, recursively
*
* @param array $fields
*
* @return array
*/
static function get_fields( $fields )
{
$all_fields = array();
foreach ( $fields as $field )
{
$all_fields[] = $field;
if ( isset( $field['fields'] ) )
$all_fields = array_merge( $all_fields, self::get_fields( $field['fields'] ) );
}
return $all_fields;
}
/**************************************************
SHOW META BOX
**************************************************/
/**
* Add meta box for multiple post types
*
* @return void
*/
function add_meta_boxes()
{
foreach ( $this->meta_box['pages'] as $page )
{
add_meta_box(
$this->meta_box['id'],
$this->meta_box['title'],
array( $this, 'show' ),
$page,
$this->meta_box['context'],
$this->meta_box['priority']
);
}
}
/**
* Hide meta box if it's set 'default_hidden'
*
* @param array $hidden Array of default hidden meta boxes
* @param object $screen Current screen information
*
* @return array
*/
function hide( $hidden, $screen )
{
if (
'post' === $screen->base
&& in_array( $screen->post_type, $this->meta_box['pages'] )
&& $this->meta_box['default_hidden']
)
{
$hidden[] = $this->meta_box['id'];
}
return $hidden;
}
/**
* Callback function to show fields in meta box
*
* @return void
*/
function show()
{
global $post;
$saved = self::has_been_saved( $post->ID, $this->fields );
// Container
printf(
'<div class="rwmb-meta-box" data-autosave="%s">',
$this->meta_box['autosave'] ? 'true' : 'false'
);
wp_nonce_field( "rwmb-save-{$this->meta_box['id']}", "nonce_{$this->meta_box['id']}" );
// Allow users to add custom code before meta box content
// 1st action applies to all meta boxes
// 2nd action applies to only current meta box
do_action( 'rwmb_before' );
do_action( "rwmb_before_{$this->meta_box['id']}" );
foreach ( $this->fields as $field )
{
call_user_func( array( self::get_class_name( $field ), 'show' ), $field, $saved );
}
// Include validation settings for this meta-box
if ( isset( $this->validation ) && $this->validation )
{
echo '
<script>
if ( typeof rwmb == "undefined" )
{
var rwmb = {
validationOptions : jQuery.parseJSON( \'' . json_encode( $this->validation ) . '\' ),
summaryMessage : "' . esc_html__( 'Please correct the errors highlighted below and try again.', 'harvest' ) . '"
};
}
else
{
var tempOptions = jQuery.parseJSON( \'' . json_encode( $this->validation ) . '\' );
jQuery.extend( true, rwmb.validationOptions, tempOptions );
};
</script>
';
}
// Allow users to add custom code after meta box content
// 1st action applies to all meta boxes
// 2nd action applies to only current meta box
do_action( 'rwmb_after' );
do_action( "rwmb_after_{$this->meta_box['id']}" );
// End container
echo '</div>';
}
/**************************************************
SAVE META BOX
**************************************************/
/**
* Save data from meta box
*
* @param int $post_id Post ID
*
* @return void
*/
function save_post( $post_id )
{
// Check if this function is called to prevent duplicated calls like revisions, manual hook to wp_insert_post, etc.
if ( $this->saved === true )
return;
$this->saved = true;
// Check whether form is submitted properly
$id = $this->meta_box['id'];
if ( empty( $_POST["nonce_{$id}"] ) || !wp_verify_nonce( $_POST["nonce_{$id}"], "rwmb-save-{$id}" ) )
return;
// Autosave
if ( defined( 'DOING_AUTOSAVE' ) && !$this->meta_box['autosave'] )
return;
// Make sure meta is added to the post, not a revision
if ( $the_post = wp_is_post_revision( $post_id ) )
$post_id = $the_post;
// Before save action
do_action( 'rwmb_before_save_post', $post_id );
do_action( "rwmb_{$this->meta_box['id']}_before_save_post", $post_id );
foreach ( $this->fields as $field )
{
$name = $field['id'];
$old = get_post_meta( $post_id, $name, !$field['multiple'] );
$new = isset( $_POST[$name] ) ? $_POST[$name] : ( $field['multiple'] ? array() : '' );
// Allow field class change the value
$new = call_user_func( array( self::get_class_name( $field ), 'value' ), $new, $old, $post_id, $field );
// Use filter to change field value
// 1st filter applies to all fields with the same type
// 2nd filter applies to current field only
$new = apply_filters( "rwmb_{$field['type']}_value", $new, $field, $old );
$new = apply_filters( "rwmb_{$name}_value", $new, $field, $old );
// Call defined method to save meta value, if there's no methods, call common one
call_user_func( array( self::get_class_name( $field ), 'save' ), $new, $old, $post_id, $field );
}
// After save action
do_action( 'rwmb_after_save_post', $post_id );
do_action( "rwmb_{$this->meta_box['id']}_after_save_post", $post_id );
// Done saving post meta
$called = false;
}
/**************************************************
HELPER FUNCTIONS
**************************************************/
/**
* Normalize parameters for meta box
*
* @param array $meta_box Meta box definition
*
* @return array $meta_box Normalized meta box
*/
static function normalize( $meta_box )
{
// Set default values for meta box
$meta_box = wp_parse_args( $meta_box, array(
'id' => sanitize_title( $meta_box['title'] ),
'context' => 'normal',
'priority' => 'high',
'pages' => array( 'post' ),
'autosave' => false,
'default_hidden' => false,
) );
// Set default values for fields
$meta_box['fields'] = self::normalize_fields( $meta_box['fields'] );
return $meta_box;
}
/**
* Normalize an array of fields
*
* @param array $fields Array of fields
*
* @return array $fields Normalized fields
*/
static function normalize_fields( $fields )
{
foreach ( $fields as &$field )
{
$field = wp_parse_args( $field, array(
'multiple' => false,
'clone' => false,
'std' => '',
'desc' => '',
'format' => '',
'before' => '',
'after' => '',
'field_name' => isset( $field['id'] ) ? $field['id'] : '',
'required' => false,
'placeholder' => ''
) );
// Allow field class add/change default field values
$field = call_user_func( array( self::get_class_name( $field ), 'normalize_field' ), $field );
if ( isset( $field['fields'] ) )
$field['fields'] = self::normalize_fields( $field['fields'] );
}
return $fields;
}
/**
* Get field class name
*
* @param array $field Field array
*
* @return bool|string Field class name OR false on failure
*/
static function get_class_name( $field )
{
// Convert underscores to whitespace so ucwords works as expected. Otherwise: plupload_image -> Plupload_image instead of Plupload_Image
$type = str_replace( '_', ' ', $field['type'] );
// Uppercase first words
$class = 'RWMB_' . ucwords( $type ) . '_Field';
// Relace whitespace with underscores
$class = str_replace( ' ', '_', $class );
return class_exists( $class ) ? $class : false;
}
/**
* Check if meta box has been saved
* This helps saving empty value in meta fields (for text box, check box, etc.)
*
* @param int $post_id
* @param array $fields
*
* @return bool
*/
static function has_been_saved( $post_id, $fields )
{
foreach ( $fields as $field )
{
$value = get_post_meta( $post_id, $field['id'], !$field['multiple'] );
if (
( !$field['multiple'] && '' !== $value )
|| ( $field['multiple'] && array() !== $value )
)
{
return true;
}
}
return false;
}
}
}