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<?php
/**
* Handles processing POST data from a toolset-forms form and updates a single field.
*
* @since 1.9
*/
final class WPCF_Field_Data_Saver {
/** @var WPCF_Field_Instance */
private $field;
/** @var string */
private $form_id;
/**
* WPCF_Field_Data_Saver constructor.
*
* @param WPCF_Field_Instance $field_instance Field that should be updated.
* @param string $form_id ID attribute of the form element that is being read from.
* @throws InvalidArgumentException
*/
public function __construct( $field_instance, $form_id ) {
if( ! $field_instance instanceof WPCF_Field_Instance ) {
throw new InvalidArgumentException( 'Invalid field instance (must be an field of existing object).' );
}
$this->field = $field_instance;
$this->form_id = $form_id;
}
private $field_values = null;
/**
* Read the field values from $_POST.
*
* @return array Values in the "intermediate" format (see WPCF_Field_DataMapper_Abstract). For non-repetitive values,
* it will be an array with a single item.
*/
private function read_field_values() {
if( null == $this->field_values ) {
$definition = $this->field->get_definition();
$form_data = wpcf_ensarr( wpcf_getpost( 'wpcf' ) );
$values = wpcf_getarr( $form_data, $definition->get_slug() );
// Handle single fields.
if ( ! $definition->get_is_repetitive() ) {
$values = array( $values );
}
// Map POST values to intermediate format.
$this->field_values = array();
$data_mapper = $definition->get_data_mapper();
foreach( $values as $value ) {
$this->field_values[] = $data_mapper->post_to_intermediate( $value, $form_data );
}
}
return wpcf_ensarr( $this->field_values );
}
/**
* @return array Array of true and WP_Error, one for each field value.
*/
public function validate_field_data() {
$field_config = Types_Field_Utils::get_toolset_forms_field_config( $this->field );
$this->toggle_adding_field_names_to_error_messages( false );
$values = $this->read_field_values();
$results = array();
foreach( $values as $key => $value ) {
$results[ $key ] = $this->validate_single_field_value( $field_config, $value );
}
$this->toggle_adding_field_names_to_error_messages( true );
return $results;
}
private function is_all_field_data_valid() {
$validation_results = $this->validate_field_data();
foreach( $validation_results as $validation_result ) {
if( $validation_result instanceof WP_Error ) {
return false;
}
}
return true;
}
/**
* Sets if toolset-forms will be adding field name to error messages (that will be returned as WP_Error objects).
*
* Default is to add field names, make sure you return to this state afterwards.
*
* @param bool $add_field_name True if field name should be added to error messages.
*/
private function toggle_adding_field_names_to_error_messages( $add_field_name ) {
if( false == $add_field_name ) {
add_filter( 'toolset_common_validation_add_field_name_to_error', '__return_false' );
} else {
remove_filter( 'toolset_common_validation_add_field_name_to_error', '__return_false' );
}
}
/**
* @param $field_config
* @param $value
*
* @return true|WP_Error
*/
private function validate_single_field_value( $field_config, $value ) {
return wptoolset_form_validate_field( $this->form_id, $field_config, $value );
}
/**
* Update field value if it is valid.
*
* @return bool|WP_Error True on success, false or WP_Error on failure.
*/
public function save_field_data() {
if( !$this->is_all_field_data_valid() ) {
return new WP_Error( 'Attempt to save a field with invalid value.' );
}
$values = $this->read_field_values();
$is_success = $this->field->update_all_values( $values );
return $is_success;
}
}