Newoption.php

<?php

class Ip_Global_Model_Backend_Newoption extends Mage_Eav_Model_Entity_Attribute_Backend_Abstract
{
    /**
     * Save EAV attribute option value if doesn't exist
     *
     * @param Varien_Object $object
     * @return Ip_Global_Model_Backend_Newoption
     */
    public function beforeSave($object)
    {
        $code = $this->getAttribute()->getAttributeCode();
        if($object->getData($code)){
            $option_id = $this->addAttributeValue($code, $object->getData($code));
            $object->setData($code, $option_id);
        }
        return $this;
    }

    protected function getOptionId(Mage_Eav_Model_Entity_Attribute $attribute, $value)
    {
        /* @var Mage_Eav_Model_Entity_Attribute_Source_Table $attribute_options_model */
        $attribute_options_model= Mage::getModel('eav/entity_attribute_source_table') ;
        $attribute_options_model->setAttribute($attribute);
        return $attribute_options_model->getOptionId($value);
    }

    protected function addAttributeValue($code, $value)
    {
        /* @var Mage_Eav_Model_Entity_Attribute $attribute_model */
        $attribute_model        = Mage::getModel('eav/entity_attribute');
        $attribute_id           = $attribute_model->getIdByCode('catalog_product', $code);
        $attribute              = $attribute_model->load($attribute_id);
        if(!$option_id = $this->getOptionId($attribute, $value)){
            /* @var Mage_Eav_Model_Entity_Setup $setup */
            $setup = Mage::getModel('eav/entity_setup', 'core_setup');
            $option['attribute_id'] = $attribute_id;
            $option['value']['option_'.$attribute_id][0] = $value;
            $setup->addAttributeOption($option);
            $option_id = $this->getOptionId($attribute, $value);
        }
        return $option_id;
    }


}