Mini Shell

<?php

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly
}

if ( ! class_exists( 'acf_fields' ) ) :

	class acf_fields {

		/** @var array Contains an array of field type instances */
		var $types = array();


		/*
		*  __construct
		*
		*  This function will setup the class functionality
		*
		*  @type    function
		*  @date    5/03/2014
		*  @since   5.4.0
		*
		*  @param   n/a
		*  @return  n/a
		*/

		function __construct() {
			/* do nothing */
		}


		/*
		*  register_field_type
		*
		*  This function will register a field type instance
		*
		*  @type    function
		*  @date    6/07/2016
		*  @since   5.4.0
		*
		*  @param   $class (string)
		*  @return  n/a
		*/

		function register_field_type( $class ) {

			// allow instance
			if ( $class instanceof acf_field ) {
				$this->types[ $class->name ] = $class;

				// allow class name
			} else {
				$instance                       = new $class();
				$this->types[ $instance->name ] = $instance;
			}
		}


		/*
		*  get_field_type
		*
		*  This function will return a field type instance
		*
		*  @type    function
		*  @date    6/07/2016
		*  @since   5.4.0
		*
		*  @param   $name (string)
		*  @return  (mixed)
		*/

		function get_field_type( $name ) {
			return isset( $this->types[ $name ] ) ? $this->types[ $name ] : null;
		}


		/*
		*  is_field_type
		*
		*  This function will return true if a field type exists
		*
		*  @type    function
		*  @date    6/07/2016
		*  @since   5.4.0
		*
		*  @param   $name (string)
		*  @return  (mixed)
		*/

		function is_field_type( $name ) {
			return isset( $this->types[ $name ] );
		}


		/*
		*  register_field_type_info
		*
		*  This function will store a basic array of info about the field type
		*  to later be overriden by the above register_field_type function
		*
		*  @type    function
		*  @date    29/5/17
		*  @since   5.6.0
		*
		*  @param   $info (array)
		*  @return  n/a
		*/

		function register_field_type_info( $info ) {

			// convert to object
			$instance                       = (object) $info;
			$this->types[ $instance->name ] = $instance;
		}


		/*
		*  get_field_types
		*
		*  This function will return an array of all field types
		*
		*  @type    function
		*  @date    6/07/2016
		*  @since   5.4.0
		*
		*  @param   $name (string)
		*  @return  (mixed)
		*/

		function get_field_types() {
			return $this->types;
		}
	}


	// initialize
	acf()->fields = new acf_fields();

endif; // class_exists check


/*
*  acf_register_field_type
*
*  alias of acf()->fields->register_field_type()
*
*  @type    function
*  @date    31/5/17
*  @since   5.6.0
*
*  @param   n/a
*  @return  n/a
*/

function acf_register_field_type( $class ) {
	return acf()->fields->register_field_type( $class );
}


/*
*  acf_register_field_type_info
*
*  alias of acf()->fields->register_field_type_info()
*
*  @type    function
*  @date    31/5/17
*  @since   5.6.0
*
*  @param   n/a
*  @return  n/a
*/

function acf_register_field_type_info( $info ) {
	return acf()->fields->register_field_type_info( $info );
}


/*
*  acf_get_field_type
*
*  alias of acf()->fields->get_field_type()
*
*  @type    function
*  @date    31/5/17
*  @since   5.6.0
*
*  @param   n/a
*  @return  n/a
*/

function acf_get_field_type( $name ) {
	return acf()->fields->get_field_type( $name );
}


/*
*  acf_get_field_types
*
*  alias of acf()->fields->get_field_types()
*
*  @type    function
*  @date    31/5/17
*  @since   5.6.0
*
*  @param   n/a
*  @return  n/a
*/

function acf_get_field_types( $args = array() ) {

	// default
	$args = wp_parse_args(
		$args,
		array(
			'public' => true,    // true, false
		)
	);

	// get field types
	$field_types = acf()->fields->get_field_types();

	// filter
	return wp_filter_object_list( $field_types, $args );
}


/**
 *  acf_get_field_types_info
 *
 *  Returns an array containing information about each field type
 *
 *  @date    18/6/18
 *  @since   5.6.9
 *
 *  @param   type $var Description. Default.
 *  @return  type Description.
 */

function acf_get_field_types_info( $args = array() ) {

	// vars
	$data        = array();
	$field_types = acf_get_field_types();

	// loop
	foreach ( $field_types as $type ) {
		$data[ $type->name ] = array(
			'label'    => $type->label,
			'name'     => $type->name,
			'category' => $type->category,
			'public'   => $type->public,
		);
	}

	// return
	return $data;
}


/*
*  acf_is_field_type
*
*  alias of acf()->fields->is_field_type()
*
*  @type    function
*  @date    31/5/17
*  @since   5.6.0
*
*  @param   n/a
*  @return  n/a
*/

function acf_is_field_type( $name = '' ) {
	return acf()->fields->is_field_type( $name );
}


/*
*  acf_get_field_type_prop
*
*  This function will return a field type's property
*
*  @type    function
*  @date    1/10/13
*  @since   5.0.0
*
*  @param   n/a
*  @return  (array)
*/

function acf_get_field_type_prop( $name = '', $prop = '' ) {
	$type = acf_get_field_type( $name );
	return ( $type && isset( $type->$prop ) ) ? $type->$prop : null;
}


/*
*  acf_get_field_type_label
*
*  This function will return the label of a field type
*
*  @type    function
*  @date    1/10/13
*  @since   5.0.0
*
*  @param   n/a
*  @return  (array)
*/

function acf_get_field_type_label( $name = '' ) {
	$label = acf_get_field_type_prop( $name, 'label' );
	return $label ? $label : '<span class="acf-tooltip-js" title="' . __( 'Field type does not exist', 'acf' ) . '">' . __( 'Unknown', 'acf' ) . '</span>';
}


/*
*  acf_field_type_exists (deprecated)
*
*  deprecated in favour of acf_is_field_type()
*
*  @type    function
*  @date    1/10/13
*  @since   5.0.0
*
*  @param   $type (string)
*  @return  (boolean)
*/

function acf_field_type_exists( $type = '' ) {
	return acf_is_field_type( $type );
}


/*
*  acf_get_grouped_field_types
*
*  Returns an multi-dimentional array of field types "name => label" grouped by category
*
*  @type    function
*  @date    1/10/13
*  @since   5.0.0
*
*  @param   n/a
*  @return  (array)
*/

function acf_get_grouped_field_types() {

	// vars
	$types  = acf_get_field_types();
	$groups = array();
	$l10n   = array(
		'basic'      => __( 'Basic', 'acf' ),
		'content'    => __( 'Content', 'acf' ),
		'choice'     => __( 'Choice', 'acf' ),
		'relational' => __( 'Relational', 'acf' ),
		'jquery'     => __( 'jQuery', 'acf' ),
		'layout'     => __( 'Layout', 'acf' ),
	);

	// loop
	foreach ( $types as $type ) {

		// translate
		$cat = $type->category;
		$cat = isset( $l10n[ $cat ] ) ? $l10n[ $cat ] : $cat;

		// append
		$groups[ $cat ][ $type->name ] = $type->label;
	}

	// filter
	$groups = apply_filters( 'acf/get_field_types', $groups );

	// return
	return $groups;
}