<?php
/**
 * patForms Rule Duplicates in tables
 *
 * $Id$
 *
 * @package	Wombat
 * @subpackage patForms
 * @author gERD Schaufelberger <gerd@php-tools.net>
 */

WBClass::load('WBPAT_Forms_Rule');

/**
 * PatForms Rule Duplicate Check For E-Mail-Adresses
 *
 * Helps to avoid duplicate e-mail tables or user data
 *
 * @version 0.4.0
 * @package	Wombat
 * @subpackage patForms
 */
class patForms_Rule_EmailDuplicate extends WBPAT_Forms_Rule
{
    /**
     * default config values
     *  - table
     *  - id
     * 
     * @var array
     */
    protected $config   =   array(
                            'table'     =>  '__user',
                            'id'        =>  null,
                            'clause'    =>  array(),
                            'option'    =>  array()
                            );
    
   /**
    * Initialize validation codes using gettext
    *
    * @access protected
    * @return bool $success Always returns true.
    * @see $attributeDefaults
    */
    public function loadValidatiorErrorCodes()
    {
        $this->validatorErrorCodes  = array(
            1   =>   patI18n::dgettext('wombat', 'The entered value must not be empty.'),
            2   =>   patI18n::dgettext('wombat', 'The @ sign is missing.'),
            3   =>   patI18n::dgettext('wombat', 'This email address is already in use, try another one..'),
        );
        return true;
    }
    
    /**
     * Method called by patForms or any patForms_Element to validate the
     * element or the form.
     *
     * @param patForms_Element $form object
     * @return bool true on sucess
     */
    public function applyRule(&$element, $type = PATFORMS_RULE_AFTER_VALIDATION)
    {
        $value  =   $element->getValue();
        if (empty($value)) {
            $this->addValidationError(1);
            return false;   
        }
        
        // check for @
        if (strstr($value, '@') === false) {
            $this->addValidationError(2);
            return false;               
        }

        switch ($this->config['table']) {
            case '__user':
                return $this->applyRule4UserStorage($value);
                break;

            default:
                break;
        }
        return $this->applyRule4Table($value);

    }

    private function applyRule4Table($value)
    {
        list($local, $domain)   =   explode('@', $value, 2);
        /** @var WBDatasource_Table */
        $table      =   WBClass::create('WBDatasource_Table');
        $clause     =   $this->config['clause'];
        if (!is_array($clause)) {
            $clause =   array();
        }
        $clause[]   =   array(
                            'field'     => 'emaillocal',
                            'value'     => $local
                    );
        $clause[]   =   array(
                            'field'     => 'emaildomain',
                            'value'     => $domain
                    );
        if (!empty($this->config['id'])) {
            $clause[]   =   array(
                            'field'     =>  $table->getIdentifier($this->config['table'], true),
                            'relation'  =>  'not',
                            'value'     =>  $this->config['id']
                    );
        }

        $option     =   $this->config['option'];
        if (!is_array($option)) {
            $option =   array();
        }

        $others     =   $table->getIds($this->config['table'], null, $clause, $option);
        if (count($others)) {
            $this->addValidationError(3);
            return false;
        }
        return true;
    }

    private function applyRule4UserStorage($value)
    {
        // user storage module to check
        WBClass::load('WBUser');
        /** @var WBUser_Storage */
        $stor   =   WBUser::getCurrent()->getStorageModule();

        $check  =   array(
                        'email' =>  $value
                    );
        $id     =   $stor->find($check, false);
        if (empty($id)) {
            return true;
        }

        if (empty($this->config['id'])) {
            $this->addValidationError(3);
            return false;
        }

        if (count($id) > 1) {
            $this->addValidationError(3);
            return false;
        }

        if ($this->config['id'] == $id[0]) {
            return true;
        }
        $this->addValidationError(3);
        return false;
    }
}