<?php

class App_ECommerce_Product_Admin_Obj extends App_ECommerce_Product_Abstract_Obj
{
    protected function _getFromColumns()
    {
        $columns = parent::_getFromColumns();
        $columns['imageCount'] = new Zend_Db_Expr('(' . $this->_getFromImageCountSelect() . ')');
        $columns['categories'] = $this->_getCategoriesExpr();
        return $columns;
    }

    protected function _getCategoriesExpr()
    {
        $select = $this->_db->select();
        $select->from($this->_getPair($this->_tableAlias . '2Category', 'pc'), 'GROUP_CONCAT(`pc`.`categoryId`)')
            ->where('`pc`.`productId` = `' . $this->_tableAlias . '`.`id`');
        return new Zend_Db_Expr('(' . $select . ')');
    }

    protected function _getFromImageCountSelect()
    {
        $select = $this->_db->select();
        $select->from($this->_getPair($this->_tableAlias . 'Image'), 'COUNT(*)');
        $select->where('`productId` = `' . $this->_tableAlias . '`.`id`');
        return $select;
    }

    protected function _insertDependency()
    {
        $this->_saveDependency();
        return $this;
    }

    protected function _updateDependency()
    {
        $this->_saveDependency();
        return $this;
    }

    /**
     * Save dependency for insert and update
     *
     * @return App_ECommerce_Product_Admin_Obj
     */
    protected function _saveDependency()
    {
        $categories = $this->getData('categories');
        if (!empty($categories)) {
            $this->_updateIds($this->_tableAlias . '2Category', 'productId', 'categoryId', $categories);
        }
        return $this;
    }

    protected function _deleteDependency()
    {
        $this->_deleteImages();
        return $this;
    }

    protected function _deleteImages()
    {
        $imagesObj = new App_ECommerce_Product_Image_Admin_Obj();
        $imagesObj->setProductId($this->_primaryKey);
        $this->_dependedFields = $this->_db->fetchCol(
            $imagesObj->getListSelect()->reset(Zend_Db_Select::COLUMNS)->columns('image')
        );
        return $this;
    }

    protected function _prepareList(&$list)
    {
        parent::_prepareList($list);
        $categories = $this->getCategories4Select(true);
        foreach ($list as &$row) {
            $rowCategories = array_reverse(explode(',', $row['categories']));
            $row['categories'] = array();
            foreach ($rowCategories as $category) {
                $row['categories'][$category] = $categories[$category];
            }
        }
        return parent::_prepareList($list);
    }

    protected function _filter(Zend_Db_Select $select)
    {
        parent::_filter($select);
        foreach ($this->_getCleanedFilter($this->_filter) as $field => $value) {
            switch ($field) {
                case 'category':
                    $this->_filterByCategory($select, $value);
                    break;
            }
        }
        return $this;
    }
}