<?php

namespace Twine\forms\strategies\normalization;

/**
 * TextNormalization
 * Really does nothing to the input. It came in a string and we leave it as-such
 *
 * @package               Event Espresso
 * @subpackage
 * @author                Mike Nelson
 */
class TextNormalization extends NormalizationBase
{

    /**
     * @param string $value_to_normalize
     * @return array|mixed|string
     */
    public function normalize($value_to_normalize)
    {
        if (is_array($value_to_normalize)) {
            return (string) array_shift($value_to_normalize);
        }
        // consider `"null"` values to be equivalent to null.
        if ($value_to_normalize === null) {
            return null;
        }
        return (string) $value_to_normalize;
    }


    /**
     * IF its a string in PHP, it will be a string in the HTML form. easy
     *
     * @param string $normalized_value
     * @return string
     */
    public function unnormalize($normalized_value)
    {
        // account for default "select here" option values
        if ($normalized_value === null) {
            return '';
        }
        // double-check it's a string. It's possible this value was a question option that happened to be a numeric
        // string, in which case PHP has automatically converted it to an integer!
        return (string) $normalized_value;
    }
}