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File: FormValidatorArray.php
<?php

/**
 * @file classes/form/validation/FormValidatorArray.php
 *
 * Copyright (c) 2014-2021 Simon Fraser University
 * Copyright (c) 2000-2021 John Willinsky
 * Distributed under the GNU GPL v3. For full terms see the file docs/COPYING.
 *
 * @class FormValidatorArray
 *
 * @ingroup form_validation
 *
 * @brief Form validation check that checks an array of fields.
 */

namespace PKP\form\validation;

class FormValidatorArray extends FormValidator
{
    /** @var array Array of fields to check */
    public $_fields;

    /** @var array Array of field names where an error occurred */
    public $_errorFields;

    /**
     * Constructor.
     *
     * @param \PKP\form\Form $form the associated form
     * @param string $field the name of the associated field
     * @param string $type the type of check, either "required" or "optional"
     * @param string $message the error message for validation failures (i18n key)
     * @param array $fields all subfields for each item in the array, i.e. name[][foo]. If empty it is assumed that name[] is a data field
     */
    public function __construct(&$form, $field, $type, $message, $fields = [])
    {
        parent::__construct($form, $field, $type, $message);
        $this->_fields = $fields;
        $this->_errorFields = [];
    }


    //
    // Setters and Getters
    //
    /**
     * Get array of fields where an error occurred.
     *
     * @return array
     */
    public function getErrorFields()
    {
        return $this->_errorFields;
    }


    //
    // Public methods
    //
    /**
     * @see FormValidator::isValid()
     * Value is valid if it is empty and optional or all field values are set.
     *
     * @return bool
     */
    public function isValid()
    {
        if ($this->getType() == FormValidator::FORM_VALIDATOR_OPTIONAL_VALUE) {
            return true;
        }

        $data = $this->getFieldValue();
        if (!is_array($data)) {
            return false;
        }

        $isValid = true;
        foreach ($data as $key => $value) {
            if (count($this->_fields) == 0) {
                // We expect all fields to contain values.
                if (is_null($value) || trim((string)$value) == '') {
                    $isValid = false;
                    array_push($this->_errorFields, $this->getField() . "[{$key}]");
                }
            } else {
                // In the two-dimensional case we always expect a value array.
                if (!is_array($value)) {
                    $isValid = false;
                    array_push($this->_errorFields, $this->getField() . "[{$key}]");
                    continue;
                }

                // Go through all sub-sub-fields and check them explicitly
                foreach ($this->_fields as $field) {
                    if (!isset($value[$field]) || trim((string)$value[$field]) == '') {
                        $isValid = false;
                        array_push($this->_errorFields, $this->getField() . "[{$key}][{$field}]");
                    }
                }
            }
        }

        return $isValid;
    }
}

if (!PKP_STRICT_MODE) {
    class_alias('\PKP\form\validation\FormValidatorArray', '\FormValidatorArray');
}