<?php

class App_ECommerce_ShippingPrice_Admin_Obj extends App_ECommerce_ShippingPrice_Abstract_Obj
{
    const PREVIOUS_DIRECTION = 'previous';
    const NEXT_DIRECTION = 'next';
    protected $_selectOptions = array('order' => 'startQuantity');

    public function getNeighborPrice($id, $direction = self::PREVIOUS_DIRECTION)
    {
        $select = $this->_db->select();
        $select->from($this->_getPair());
        if ($id) {
            if ($direction == self::PREVIOUS_DIRECTION) {
                $select->where('`id` < ?', $id, Qs_Db::INT_TYPE);
            } else if ($direction == self::NEXT_DIRECTION) {
                $select->where('`id` > ?', $id, Qs_Db::INT_TYPE);
            } else {
                throw new Qs_Exception("Wrong direction was set: $direction");
            }
        }
        if ($direction == self::PREVIOUS_DIRECTION) {
            $select->order('startQuantity DESC');
        } else if ($direction == self::NEXT_DIRECTION) {
            $select->order('startQuantity');
        } else {
            throw new Qs_Exception("Wrong direction was set: $direction");
        }
        $select->limit(1);
        return $this->_db->fetchRow($select);
    }

    public function updateNeighbors()
    {
        if (false != ($nextPrice = $this->getNeighborPrice($this->getPrimaryKey(), self::NEXT_DIRECTION))) {
            $this->_getTable()->update(
                array('startQuantity' => $this->getData('endQuantity') + 1),
                $this->_db->quoteInto('`id` = ?', $nextPrice['id'], Qs_Db::INT_TYPE)
            );
        }
        if (false != ($previousPrice = $this->getNeighborPrice($this->getPrimaryKey(), self::PREVIOUS_DIRECTION))) {
            $this->_getTable()->update(
                array('endQuantity' => $this->getData('startQuantity') - 1),
                $this->_db->quoteInto('`id` = ?', $previousPrice['id'], Qs_Db::INT_TYPE)
            );
        }
        return $this;
    }
}