<?php
/**
 * Sanitize Functions
 *
 * Used to validate the user input of the theme settings
 * Based on https://github.com/WPTRT/code-examples/blob/master/customizer/sanitization-callbacks.php
 *
 * @package Poseidon
 */


/**
 * Checkbox sanitization callback
 *
 * @param bool $checked Whether the checkbox is checked.
 * @return bool Whether the checkbox is checked.
 */
function poseidon_sanitize_checkbox( $checked ) {

	// Boolean check.
	return ( ( isset( $checked ) && true == $checked ) ? true : false );
	
}


/**
 * Select & Radio Button sanitization callback
 * 
 * @see sanitize_key()               https://developer.wordpress.org/reference/functions/sanitize_key/
 * @see $wp_customize->get_control() https://developer.wordpress.org/reference/classes/wp_customize_manager/get_control/
 *
 * @param string               $input   Slug to sanitize.
 * @param WP_Customize_Setting $setting Setting instance.
 * @return string Sanitized slug if it is a valid choice; otherwise, the setting default.
 */
function poseidon_sanitize_select( $input, $setting ) {
	
	// Ensure input is a slug.
	$input = sanitize_key( $input );
	
	// Get list of choices from the control associated with the setting.
	$choices = $setting->manager->get_control( $setting->id )->choices;
	
	// If the input is a valid key, return it; otherwise, return the default.
	return ( array_key_exists( $input, $choices ) ? $input : $setting->default );
}