<?php

class Qs_Form_Element_Phone extends Zend_Form_Element_Xhtml
{
    const DASH_FORMAT = 'dashFormat'; // (xxx) xxx-xxxx ext. xxx
    const DOT_FORMAT = 'dotFormat'; // xxx.xxx.xxxx ext. xxx

    public $helper = 'formPhone';

    protected $_formatPatterns = array(
        self::DASH_FORMAT => '/^\(\d{3}\)\s\d{3}-\d{4}(?:\sext\.\s\d{1,6})?$/',
        self::DOT_FORMAT  => '/^\d{3}\.\d{3}\.\d{4}(?:\sext\.\s\d{1,6})?$/',
    );

    protected $_placeholders = [
        self::DASH_FORMAT => '(555) 555-5555 ext. 123',
        self::DOT_FORMAT  => '555.555.5555 ext. 123',
    ];
    protected $_format = self::DOT_FORMAT;

    public function init()
    {
        $pattern = $this->_formatPatterns[$this->_format];
        if (!$pattern) {
            throw new Qs_Exception('Unknown phone pattern.');
        }
        $this->addValidator(
            'regex',
            true,
            array( 'pattern' => $pattern, 'messages' => 'Phone number is in wrong format')
        );

        if (!$this->getFilter('Phone')) {
            $this->addFilter('Phone', array($this->_format));
        }

        return $this;
    }

    public function setFormat($format)
    {
        if (!in_array($format, array_keys($this->_formatPatterns))) {
            throw new Qs_Exception('Unknown phone format.');
        }
        $this->_format = $format;
        return $this;
    }

    public function getFormat()
    {
        return $this->_format;
    }

    protected function initPlaceholder()
    {
        if (null === $this->getAttrib('placeholder')
            && ($placeholder = Qs_Array::get($this->_placeholders, $this->getFormat()))
        ) {
            $this->setAttrib('placeholder', $placeholder);
        }
        return $this;
    }

    public function getAttribs()
    {
        $this->initPlaceholder();
        return parent::getAttribs();
    }


    public function loadDefaultDecorators()
    {
        if ($this->loadDefaultDecoratorsIsDisabled()) {
            return $this;
        }

        $decorators = $this->getDecorators();
        if (empty($decorators)) {
            $this->addDecorator('ViewHelper')
                 ->addDecorator('Phone')
                 ->addDecorator('Errors')
                 ->addDecorator('Description', array('tag' => 'p', 'class' => 'description'))
                 ->addDecorator('HtmlTag', array('tag' => 'dd', 'id'  => $this->getName() . '-element'))
                 ->addDecorator('Label', array('tag' => 'dt'));
        }

        return $this;
    }
}