<?php

class Qs_Form_Element_DateExtended extends Zend_Form_Element_Xhtml
{
    protected $_format = 'Y-m-d';

    public $helper = 'formDate';

    /**
     * @param string $format
     * @return $this
     */
    public function setFormat($format)
    {
        $this->_format = $format;
        return $this;
    }

    /**
     * @return string
     */
    public function getFormat()
    {
        return $this->_format;
    }

    public function setView(Zend_View_Interface $view = null)
    {
        $this->_view = $view;
        return $this;
    }

    public function isValid($value, $context = null)
    {
        $attributes = $this->getAttribs();
        $checkValue = $value;
        if (is_array($value)) {
            if (!isset($attributes['showYear']) || $attributes['showYear']) {
                $checkValueYear = Qs_Array::get($value, 'year');
            } else {
                $checkValueYear = '0';
            }
            if (!isset($attributes['showMonth']) || $attributes['showMonth']) {
                $checkValueMonth = Qs_Array::get($value, 'month');
            } else {
                $checkValueMonth = '01';
            }
            if (!isset($attributes['showDay']) || $attributes['showDay']) {
                $checkValueDay = $value['day'];
            } else {
                $checkValueDay = '01';
            }
            if (ctype_digit($checkValueYear) && ctype_digit($checkValueMonth) && ctype_digit($checkValueDay)) {
                $checkValue = $checkValueYear . '-' . $checkValueMonth . '-' . $checkValueDay;
            } elseif ((!isset($attributes['showYear']) || $attributes['showYear']) && ctype_digit($checkValueYear)) {
                $checkValue = $checkValueYear;
            } else {
                $checkValue = null;
            }
        }
        return parent::isValid($checkValue, $context);
    }

    public function getValue()
    {
        if (!empty($this->_value)) {
            $value = '--';
            if (is_array($this->_value)) {
                if (empty($this->_value['day'])) {
                    $this->_value['day'] = 1;
                }
                $value = $this->_value['year'] . '-' .
                    $this->_value['month'] . '-' .
                    $this->_value['day'];
            } elseif (is_string($this->_value)) {
                $value = date($this->getFormat(), strtotime($this->_value));
            }
            if ($value == '--') {
                $value = null;
            }
            $this->setValue($value);
        }
        return parent::getValue();
    }
}