<?php
/**
 * The Beans Post Meta component extends the Beans Fields and make it easy add fields to any Post Type.
 *
 * @package API\Post_Meta
 */

/**
 * Register Post Meta.
 *
 * This function should only be invoked through the 'admin_init' action.
 *
 * @since 1.0.0
 *
 * @param array  $fields {
 *      Array of fields to register.
 *
 * 		@type string $id          A unique id used for the field. This id will also be used to save the value in
 * 		      					  the database.
 * 		@type string $type 		  The type of field to use. Please refer to the Beans core field types for more
 * 		      					  information. Custom field types are accepted here.
 *      @type string $label 	  The field label. Default false.
 *      @type string $description The field description. The description can be truncated using <!--more-->
 *            					  as a delimiter. Default false.
 *      @type array  $attributes  An array of attributes to add to the field. The array key defines the
 *            					  attribute name and the array value defines the attribute value. Default array.
 *      @type mixed  $default     The default field value. Default false.
 *      @type array  $fields      Must only be used for 'group' field type. The array arguments are similar to the
 *            					  {@see beans_register_fields()} $fields arguments.
 *      @type bool   $db_group    Must only be used for 'group' field type. Defines whether the group of fields
 *            					  registered should be saved as a group in the database or as individual
 *            					  entries. Default false.
 * }
 * @param string|array $conditions Array of 'post types id(s)', 'post id(s)' or 'page template slug(s)' for which the post meta should be registered.
 *                                 'page template slug(s)' must include '.php' file extention. Set to true to display everywhere.
 * @param string $section          A section id to define the group of fields.
 * @param array  $args {
 *      Optional. Array of arguments used to register the fields.
 *
 * 		@type string $title    The metabox Title. Default 'Undefined'.
 * 		@type string $context  Where on the page the metabox should be shown
 * 		      				   ('normal', 'advanced', or 'side'). Default 'normal'.
 * 		@type int    $priority The priority within the context where the boxes should show
 * 		      				   ('high', 'core', 'default' or 'low'). Default 'high'.
 * }
 *
 * @return bool True on success, false on failure.
 */
function beans_register_post_meta( array $fields, $conditions, $section, $args = array() ) {

	global $_beans_post_meta_conditions;

	/**
	 * Filter the post meta fields.
	 *
	 * The dynamic portion of the hook name, $section, refers to the section id which defines the group of fields.
	 *
	 * @since 1.0.0
	 *
	 * @param array $fields An array of post meta fields.
	 */
	$fields = apply_filters( "beans_post_meta_fields_{$section}", _beans_pre_standardize_fields( $fields ) );

	/**
	 * Filter the conditions used to define whether the fields set should be displayed or not.
	 *
	 * The dynamic portion of the hook name, $section, refers to the section id which defines the group of fields.
	 *
	 * @since 1.0.0
	 *
	 * @param string|array $conditions Conditions used to define whether the fields set should be displayed or not.
	 */
	$conditions = apply_filters( "beans_post_meta_post_types_{$section}", $conditions );
	$_beans_post_meta_conditions = array_merge( $_beans_post_meta_conditions, (array) $conditions );

	// Stop here if the current page isn't concerned.
	if ( !_beans_is_post_meta_conditions( $conditions ) || !is_admin() )
		return;

	// Stop here if the field can't be registered.
	if ( !beans_register_fields( $fields, 'post_meta', $section ) )
		return false;

	// Load the class only if this function is called to prevent unnecessary memory usage.
	require_once( BEANS_API_PATH . 'post-meta/class.php' );

	new _Beans_Post_Meta( $section, $args );

}


/**
 * Check the current screen conditions.
 *
 * @ignore
 */
function _beans_is_post_meta_conditions( $conditions ) {

	// Check if it is a new post and treat it as such.
	if ( stripos( $_SERVER['REQUEST_URI'], 'post-new.php' ) !== false ) {

		if ( !$current_post_type = beans_get( 'post_type' ) )
			if ( in_array( 'post', (array) $conditions ) )
				return true;
			else
				return false;

	} else {

		// Try to get id from $_GET.
		if ( $id = beans_get( 'post' ) )
			$post_id = $id;
		// Try to get id from $_POST.
		elseif ( $id = beans_post( 'post_ID' ) )
			$post_id = $id;

		if ( !isset( $post_id ) )
			return false;

		$current_post_type = get_post_type( $post_id );

	}

	$statements = array(
		$conditions === true,
		in_array( $current_post_type, (array) $conditions ), // Check post type.
		isset( $post_id) && in_array( $post_id, (array) $conditions ), // Check post id.
		isset( $post_id) && in_array( get_post_meta( $post_id, '_wp_page_template', true ), (array) $conditions ) // Check page template.
	);

	// Return true if any condition is met, otherwise false.
	return in_array( true, $statements );

}


add_action( 'admin_print_footer_scripts', '_beans_post_meta_page_template_reload' );

/**
 * Reload post edit screen on page template change.
 *
 * @ignore
 */
function _beans_post_meta_page_template_reload() {

	global $_beans_post_meta_conditions, $pagenow;

	// Stop here if not editing a post object.
	if ( !in_array( $pagenow, array( 'post-new.php', 'post.php' ) ) )
		return;

	$encode = json_encode( $_beans_post_meta_conditions );

	// Stop here of there isn't any post meta assigned to page templates.
	if ( stripos( $encode, '.php' ) === false )
		return;

	echo "<script type='text/javascript'>\n!(function(a){a(document).ready(function(){a('#page_template').data('beans-pre',a('#page_template').val());a('#page_template').change(function(){if(a.inArray(a(this).val(),$encode)===-1&&a.inArray(a(this).data('beans-pre'),$encode)===-1){return}a(this).data('beans-pre',a(this).val());var b=a('#save-action #save-post');if(b.length===0){b=a('#publishing-action #publish')}b.trigger('click');a('#wpbody-content').fadeOut()})})})(jQuery);\n</script>";

}


/**
 * Initialize post meta conditions.
 *
 * @ignore
 */
global $_beans_post_meta_conditions;

if ( !isset( $_beans_post_meta_conditions ) )
	$_beans_post_meta_conditions = array();