<?php

namespace Twine\forms\strategies\normalization;

/**
 * ManyValuesNormalization
 *
 * @package               Event Espresso
 * @subpackage
 * @author                Mike Nelson
 */
class ManyValuedNormalization extends NormalizationBase
{

    /**
     * @var array|NormalizationBase
     */
    protected $individual_item_normalization_strategy = array();


    /**
     * @param NormalizationBase $individual_item_normalization_strategy
     */
    public function __construct($individual_item_normalization_strategy)
    {
        $this->individual_item_normalization_strategy = $individual_item_normalization_strategy;
        parent::__construct();
    }


    /**
     * Normalizes the input into an array, and normalizes each item according to its
     * individual item normalization strategy
     *
     * @param array | string $value_to_normalize
     * @return array
     */
    public function normalize($value_to_normalize)
    {
        if (is_array($value_to_normalize)) {
            $items_to_normalize = $value_to_normalize;
        } elseif ($value_to_normalize !== null) {
            $items_to_normalize = array($value_to_normalize);
        } else {
            $items_to_normalize = array();
        }
        $normalized_array_value = array();
        foreach ($items_to_normalize as $key => $individual_item) {
            $normalized_array_value[ $key ] = $this->normalizeOne($individual_item);
        }
        return $normalized_array_value;
    }


    /**
     * Normalized the one item (called for each array item in Many_values_Normalization::normalize())
     *
     * @param string $individual_value_to_normalize but definitely NOT an array
     * @return mixed
     */
    public function normalizeOne($individual_value_to_normalize)
    {
        return $this->individual_item_normalization_strategy->normalize($individual_value_to_normalize);
    }


    /**
     * Converts the array of normalized things to an array of raw html values.
     *
     * @param array $normalized_values
     * @return string[]
     */
    public function unnormalize($normalized_values)
    {
        if ($normalized_values === null) {
            $normalized_values = array();
        }
        if (! is_array($normalized_values)) {
            $normalized_values = array($normalized_values);
        }
        $non_normal_values = array();
        foreach ($normalized_values as $key => $value) {
            $non_normal_values[ $key ] = $this->unnormalizeOne($value);
        }
        return $non_normal_values;
    }


    /**
     * Unnormalizes an individual item in the array of values
     *
     * @param mixed $individual_value_to_unnormalize but certainly NOT an array
     * @return string
     */
    public function unnormalizeOne($individual_value_to_unnormalize)
    {
        return $this->individual_item_normalization_strategy->unnormalize($individual_value_to_unnormalize);
    }
}