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<?php
/**
* Active callback used with the "required" argument in fields
*
* @package Kirki
* @category Core
* @author Aristeides Stathopoulos
* @copyright Copyright (c) 2017, Aristeides Stathopoulos
* @license http://opensource.org/licenses/https://opensource.org/licenses/MIT
*/
/**
* Callback class for use with the "required" argument
*/
class Kirki_Active_Callback {
/**
* Figure out whether the current object should be displayed or not.
*
* @param WP_Customize_Setting $object The current field.
* @return boolean
*/
public static function evaluate( $object ) {
$show = true;
// Get all fields.
$fields = Kirki::$fields;
// Make sure the current object matches a registered field.
if ( ! isset( $object->setting->id ) || ! isset( $fields[ $object->setting->id ] ) ) {
return true;
}
$field = $fields[ $object->setting->id ];
if ( isset( $field['required'] ) ) {
foreach ( $field['required'] as $requirement ) {
$show = self::evaluate_requirement( $object, $field, $requirement, 'AND' );
// The 1st level uses "AND" so no need to process further
// if one requirement returns false.
if ( ! $show ) {
return false;
}
}
}
return true;
}
/**
* Figure out whether the current object should be displayed or not.
* We're only parsing a single requirement here from the array of requirements.
* This is a proxy function that facilitates evaluating and/or conditions.
*
* @param WP_Customize_Setting $object The current field.
* @param object $field The current object.
* @param array $requirement A single requirement.
* @param string $relation Can be "AND" or "OR".
* @return boolean
*/
private static function evaluate_requirement( $object, $field, $requirement, $relation ) {
// Test for callables first.
if ( is_callable( $requirement ) ) {
return call_user_func_array( $requirement, array( $field, $object ) );
}
// Look for comparison array.
if ( is_array( $requirement ) && isset( $requirement['operator'], $requirement['value'], $requirement['setting'] ) ) {
if ( isset( $field['option_name'] ) && '' !== $field['option_name'] ) {
if ( false === strpos( $requirement['setting'], '[' ) ) {
$requirement['setting'] = $field['option_name'] . '[' . $requirement['setting'] . ']';
}
}
$current_setting = $object->manager->get_setting( $requirement['setting'] );
/**
* Depending on the 'operator' argument we use,
* we'll need to perform the appropriate comparison
* and figure out if the control will be shown or not.
*/
if ( method_exists( $current_setting, 'value' ) ) {
return self::compare( $requirement['value'], $current_setting->value(), $requirement['operator'] );
}
} else {
if ( ! is_array( $requirement ) ) {
return true;
}
// Handles "OR/AND" functionality & switching.
$show = false;
$sub_relation = ( 'AND' === $relation ) ? 'OR' : 'AND';
foreach ( $requirement as $sub_requirement ) {
$show = self::evaluate_requirement( $object, $field, $sub_requirement, $sub_relation );
if ( 'OR' === $sub_relation && $show ) {
return true;
}
if ( 'AND' === $sub_relation && ! $show ) {
return false;
}
}
return $show;
} // End if().
return true;
}
/**
* Compares the 2 values given the condition
*
* @param mixed $value1 The 1st value in the comparison.
* @param mixed $value2 The 2nd value in the comparison.
* @param string $operator The operator we'll use for the comparison.
* @return boolean whether The comparison has succeded (true) or failed (false).
*/
public static function compare( $value1, $value2, $operator ) {
switch ( $operator ) {
case '===':
$show = ( $value1 === $value2 ) ? true : false;
break;
case '==':
case '=':
case 'equals':
case 'equal':
$show = ( $value1 == $value2 ) ? true : false;
break;
case '!==':
$show = ( $value1 !== $value2 ) ? true : false;
break;
case '!=':
case 'not equal':
$show = ( $value1 != $value2 ) ? true : false;
break;
case '>=':
case 'greater or equal':
case 'equal or greater':
$show = ( $value2 >= $value1 ) ? true : false;
break;
case '<=':
case 'smaller or equal':
case 'equal or smaller':
$show = ( $value2 <= $value1 ) ? true : false;
break;
case '>':
case 'greater':
$show = ( $value2 > $value1 ) ? true : false;
break;
case '<':
case 'smaller':
$show = ( $value2 < $value1 ) ? true : false;
break;
case 'contains':
case 'in':
if ( is_array( $value1 ) && ! is_array( $value2 ) ) {
$array = $value1;
$string = $value2;
} elseif ( is_array( $value2 ) && ! is_array( $value1 ) ) {
$array = $value2;
$string = $value1;
}
if ( isset( $array ) && isset( $string ) ) {
if ( ! in_array( $string, $array, true ) ) {
$show = false;
}
} else {
if ( false === strrpos( $value1, $value2 ) && false === strpos( $value2, $value1 ) ) {
$show = false;
}
}
break;
default:
$show = ( $value1 == $value2 ) ? true : false;
} // End switch().
if ( isset( $show ) ) {
return $show;
}
return true;
}
}