<?php 

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

if( ! class_exists('ACF_Location_User_Role') ) :

class ACF_Location_User_Role extends ACF_Location {
	
	/**
	 * initialize
	 *
	 * Sets up the class functionality.
	 *
	 * @date	5/03/2014
	 * @since	5.0.0
	 *
	 * @param	void
	 * @return	void
	 */
	function initialize() {
		$this->name = 'user_role';
		$this->label = __( "User Role", 'acf' );
		$this->category = 'user';
		$this->object_type = 'user';
	}
	
	/**
	 * Matches the provided rule against the screen args returning a bool result.
	 *
	 * @date	9/4/20
	 * @since	5.9.0
	 *
	 * @param	array $rule The location rule.
	 * @param	array $screen The screen args.
	 * @param	array $field_group The field group settings.
	 * @return	bool
	 */
	public function match( $rule, $screen, $field_group ) {
		
		// Check screen args.
		if( isset($screen['user_role']) ) {
			$user_role = $screen['user_role'];
		} elseif( isset($screen['user_id']) ) {
			$user_id = $screen['user_id'];
			$user_role = '';
			
			// Determine $user_role from $user_id.
			if( $user_id === 'new' ) {
				$user_role = get_option( 'default_role' );
			
			// Check if user can, and if so, set the value allowing them to match.
			} elseif( user_can($user_id, $rule['value']) ) {
				$user_role = $rule['value'];
			}
		} else {
			return false;
		}
		
		// Compare rule against $user_role.
		return $this->compare_to_rule( $user_role, $rule );
	}
	
	/**
	 * Returns an array of possible values for this rule type.
	 *
	 * @date	9/4/20
	 * @since	5.9.0
	 *
	 * @param	array $rule A location rule.
	 * @return	array
	 */
	public function get_values( $rule ) {
		global $wp_roles;
		return array_merge(
			array(
				'all' => __( 'All', 'acf' )
			),
			$wp_roles->get_names()
		);
	}
}

// initialize
acf_register_location_type( 'ACF_Location_User_Role' );

endif; // class_exists check