<?php

class App_Redirection_Admin_Form_Abstract extends Qs_Form
{
    /** @var App_Redirection_Admin_Obj */
    protected $_dataObj;

    /** @var array */
    protected $_defaults = array('status' => 301);

    /** @var array */
    protected $_redirectStatuses = array(
        300 => '300 Multiple Choices',
        301 => '301 Moved Permanently',
        302 => '302 Moved temporarily',
        303 => '303 See Other',
        307 => '307 Temporary Redirect'
    );

    /**
     * @return App_Redirection_Admin_Obj
     */
    protected function _getDataObj()
    {
        if (null === $this->_dataObj) {
            $this->_dataObj = new App_Redirection_Admin_Obj();
        }
        return $this->_dataObj;
    }

    /**
     * @return App_Redirection_Admin_Form_Abstract|Qs_Form
     */
    protected function _initElements()
    {
        $this->addElement('text', 'source', array('label' => 'Source Alias', 'required' => true));

        $this->addElement('text', 'destination', array( 'label' => 'Destination Alias', 'required' => true));

        $this->addElement(
            'select',
            'status',
            array('label' => 'Redirect Status', 'multiOptions' => $this->_redirectStatuses)
        );

        $this->addFormRule(array($this, 'validateForm'));

        return $this;
    }

    /**
     * @param array $data
     * @return array|bool
     */
    public function validateForm(array $data)
    {
        $errors = array();

        $page = Qs_SiteMap::getPage($data['source']);
        if (is_array($page) && !empty($page)) {
            $errors['source'] = 'Source Alias already exists on the website';
        } else if ($this->_getDataObj()->isUnique('source', $data['source'])) {
            $errors['source'] = 'Redirect for this Source Alias already exists';
        }

        if (Qs_SiteMap::NOT_FOUND == Qs_SiteMap::getPage($data['destination'])) {
            $errors['destination'] = 'Destination Alias doesn\'t exist on the website';
        }

        return (!$errors) ? true : $errors;
    }
}