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<?php
namespace Contactable\SWV;
use WP_Error;
/**
* The base class of SWV rules.
*/
abstract class Rule {
protected $properties = array();
public function __construct( $properties = '' ) {
$this->properties = wp_parse_args( $properties, array() );
}
/**
* Returns true if this rule matches the given context.
*
* @param array $context Context.
*/
public function matches( $context ) {
$field = $this->get_property( 'field' );
if ( ! empty( $context['field'] ) ) {
if ( $field and ! in_array( $field, (array) $context['field'], true ) ) {
return false;
}
}
return true;
}
/**
* Validates with this rule's logic.
*
* @param array $context Context.
*/
public function validate( $context ) {
return true;
}
/**
* Converts the properties to an array.
*
* @return array Array of properties.
*/
public function to_array() {
$properties = (array) $this->properties;
if ( defined( 'static::rule_name' ) and static::rule_name ) {
$properties = array( 'rule' => static::rule_name ) + $properties;
}
return $properties;
}
/**
* Returns the property value specified by the given property name.
*
* @param string $name Property name.
* @return mixed Property value.
*/
public function get_property( $name ) {
if ( isset( $this->properties[$name] ) ) {
return $this->properties[$name];
}
}
/**
* Returns the default user input value from $_POST.
*
* @return mixed Default user input value.
*/
public function get_default_input() {
$field = $this->get_property( 'field' );
if ( isset( $_POST[$field] ) ) {
return wp_unslash( $_POST[$field] );
}
return '';
}
/**
* Returns the default user upload file from $_FILES.
*
* @return object Default user upload file.
*/
public function get_default_upload() {
$field = $this->get_property( 'field' );
if ( isset( $_FILES[$field] ) ) {
return (object) wp_unslash( $_FILES[$field] );
}
return (object) array();
}
/**
* Creates an error object. Returns false if the error property is omitted.
*/
protected function create_error() {
$error_code = defined( 'static::rule_name' )
? sprintf( 'swv_%s', static::rule_name )
: 'swv';
return new WP_Error(
$error_code,
(string) $this->get_property( 'error' ),
$this
);
}
}
/**
* The base class of SWV composite rules.
*/
abstract class CompositeRule extends Rule {
protected $rules = array();
/**
* Adds a sub-rule to this composite rule.
*
* @param Rule $rule Sub-rule to be added.
*/
public function add_rule( $rule ) {
if ( $rule instanceof Rule ) {
$this->rules[] = $rule;
}
}
/**
* Returns an iterator of sub-rules.
*/
public function rules() {
foreach ( $this->rules as $rule ) {
yield $rule;
}
}
/**
* Returns true if this rule matches the given context.
*
* @param array $context Context.
*/
public function matches( $context ) {
return true;
}
/**
* Validates with this rule's logic.
*
* @param array $context Context.
*/
public function validate( $context ) {
foreach ( $this->rules() as $rule ) {
if ( $rule->matches( $context ) ) {
$result = $rule->validate( $context );
if ( is_wp_error( $result ) ) {
return $result;
}
}
}
return true;
}
/**
* Converts the properties to an array.
*
* @return array Array of properties.
*/
public function to_array() {
$rules_arrays = array_map(
static function ( $rule ) {
return $rule->to_array();
},
$this->rules
);
return array_merge(
parent::to_array(),
array(
'rules' => $rules_arrays,
)
);
}
}