<?php
/**
*
*/
class sfValidatorBIC extends sfValidatorBase
{
    protected $validator;
    protected $errors;

    protected function configure($options = array(), $messages = array())
    {
        $this->validator = $this;

        $this->addRequiredOption('bank_code_field');
        $this->addRequiredOption('guichet_code_field');
        $this->addRequiredOption('account_number_field');
        $this->addRequiredOption('rib_key_field');

        $this->addOption('empty_values', false);

        $this->setMessage('invalid', 'Your BIC key is invalid.');

        $this->addMessage('length_bank_code', 'Your bank code must have 5 characters.');
        $this->addMessage('length_guichet_code', 'Your agency code must have 5 characters.');
        $this->addMessage('max_length_account_number', 'Your account number is too long (11 characters max).');
        $this->addMessage('min_length_account_number', 'Your account number is too short (8 characters min).');
        $this->addMessage('length_account_number', 'Your account number must have 11 characteres.');
        $this->addMessage('length_bic', 'Your bic key must have 2 characters.');

        parent::configure($options, $messages);
    }

    /**
     * @see sfValidatorBase
     */
    protected function doClean($values)
    {
        $this->errors = null;
        if($values === null || empty($values))
            throw new InvalidArgumentException('You must pass an none empty array parameter to the clean() method');

        if (!is_array($values))
            throw new InvalidArgumentException('You must pass an array parameter to the clean() method');

        $bankCode       = $values[$this->getOption('bank_code_field')];
        $guichetCode    = $values[$this->getOption('guichet_code_field')];
        $accountNumber  = $values[$this->getOption('account_number_field')];
        $bicKey         = $values[$this->getOption('rib_key_field')];

        if(strlen($accountNumber) < 8)
            $this->errors[$this->getOption('account_number_field')] = new sfValidatorError($this, 'min_length_account_number');

        if(strlen($accountNumber) > 11)
            $this->errors[$this->getOption('account_number_field')] = new sfValidatorError($this, 'max_length_account_number');

        if(strlen($accountNumber) < 11)
            $accountNumber = sprintf("%011s", $accountNumber);

        if(strlen($bankCode) < 5 || strlen($bankCode) > 5)
            $this->errors[$this->getOption('bank_code_field')] = new sfValidatorError($this, 'length_bank_code');

        if(strlen($guichetCode) < 5 || strlen($guichetCode) > 5)
            $this->errors[$this->getOption('guichet_code_field')] = new sfValidatorError($this, 'length_guichet_code');

        if(strlen($bicKey) < 2 || strlen($bicKey) > 2)
            $this->errors[$this->getOption('rib_key_field')] = new sfValidatorError($this, 'length_bic');

        if($this->errors)
        {
            throw new sfValidatorErrorSchema($this, $this->errors);
            return false;
        }

        if (!$this->_checkRIB($bankCode, $guichetCode, $accountNumber, $bicKey))
        {
            throw new sfValidatorErrorSchema($this, array(
               $this->getOption('rib_key_field') => new sfValidatorError($this, 'invalid')
            ));
        }

        return $values;
    }

    protected function _checkRIB($bankCode, $guichetCode, $accountNumber, $bicKey)
    {
        if(strlen($accountNumber) != 11)
            $this->errors[$this->getOption('account_number_field')] = new sfValidatorError($this->validator, 'length_account_number');

        $accountNumber = $this->_convertToDecimal($accountNumber);

        $account = $bankCode . $guichetCode . $accountNumber . $bicKey;

        return (strlen($account) >= 21 && bcmod($account, 97) == 0);
    }

    protected function _convertToDecimal($text)
    {
        $letters = array(
            'A' => 1, 'B' => 2, 'C' => 3, 'D' => 4, 'E' => 5, 'F' => 6, 'G' => 7,
            'H' => 8, 'I' => 9, 'J' => 1, 'K' => 2, 'L' => 3, 'M' => 4, 'N' => 5,
            'O' => 6, 'P' => 7, 'Q' => 8, 'R' => 9, 'S' => 2, 'T' => 3, 'U' => 4,
            'V' => 5, 'W' => 6, 'X' => 7, 'Y' => 8, 'Z' => 9,
        );

        $search = array_keys($letters);
        $replace = array_values($letters);

        return str_replace($search, $replace, $text);
    }
}