<?php if ( !defined('ABS_PATH') ) exit('ABS_PATH is not loaded. Direct access is not allowed.') ;

    /*
     *      OSCLass – software for creating and publishing online classified
     *                           advertising platforms
     *
     *                        Copyright (C) 2010 OSCLASS
     *
     *       This program is free software: you can redistribute it and/or
     *     modify it under the terms of the GNU Affero General Public License
     *     as published by the Free Software Foundation, either version 3 of
     *            the License, or (at your option) any later version.
     *
     *     This program is distributed in the hope that it will be useful, but
     *         WITHOUT ANY WARRANTY; without even the implied warranty of
     *        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     *             GNU Affero General Public License for more details.
     *
     *      You should have received a copy of the GNU Affero General Public
     * License along with this program.  If not, see <http://www.gnu.org/licenses/>.
     */
    
    /**
     * Model database for CountryStats table
     *
     * @package OSClass
     * @subpackage Model
     * @since 2.4
     */
    class CountryStats extends DAO
    {
        /**
         * It references to self object: CountryStats.
         * It is used as a singleton
         *
         * @access private
         * @since 2.4
         * @var CountryStats
         */
        private static $instance ;

        /**
        * It creates a new CountryStats object class if it has been created
        * before, it return the previous object
        *
        * @access public
        * @since 2.4
        * @return CountryStats
        */
        public static function newInstance()
        {
            if( !self::$instance instanceof self ) {
                self::$instance = new self ;
            }
            return self::$instance ;
        }

        /**
         * Set data related to t_country_stats table
         * 
         * @access public
         * @since 2.4
         */
        function __construct()
        {
            parent::__construct();
            $this->setTableName('t_country_stats') ;
            $this->setPrimaryKey('fk_c_country_code') ;
            $this->setFields( array('fk_c_country_code', 'i_num_items') ) ;
        }
        
        /**
         * Increase number of country items, given a country id
         *
         * @access public
         * @since 2.4
         * @param int $countryCode Country code 
         * @return int number of affected rows, id error occurred return false
         */
        public function increaseNumItems($countryCode) 
        {
            $lenght = strlen($countryCode);
            if($lenght > 2 || $lenght=='' ) {
                return false;
            }
            $sql = sprintf('INSERT INTO %s (fk_c_country_code, i_num_items) VALUES (\'%s\', 1) ON DUPLICATE KEY UPDATE i_num_items = i_num_items + 1', $this->getTableName(), $countryCode);
            return $this->dao->query($sql);
        }
        
        /**
         * Increase number of country items, given a Country code
         * 
         * @access public
         * @since 2.4
         * @param int $countrycode Country code 
         * @return int number of affected rows, id error occurred return false
         */
        public function decreaseNumItems($countryCode) 
        {
            $lenght = strlen($countryCode);
            if($lenght > 2 || $lenght=='' ) {
                return false;
            }
            $this->dao->select( 'i_num_items' ) ;
            $this->dao->from( $this->getTableName() ) ;
            $this->dao->where( $this->getPrimaryKey(), $countryCode ) ;
            $result       = $this->dao->get() ;
            $countryStat  = $result->row() ; 
            $return       = 0 ;

            if( isset( $countryStat['i_num_items'] ) ) {
                $this->dao->from( $this->getTableName() ) ;
                $this->dao->set( 'i_num_items', 'i_num_items - 1', false ) ;
                $this->dao->where( 'i_num_items > 0' ) ;
                $this->dao->where( 'fk_c_country_code', $countryCode ) ;

                return $this->dao->update() ;
            } 
            
            return false;
        }

        /**
         * Set i_num_items, given a country code
         *
         * @access public
         * @since 2.4
         * @param type $countryCode
         * @param type $numItems
         * @return type 
         */
        public function setNumItems($countryCode, $numItems)
        {
            return $this->dao->query("INSERT INTO ".$this->getTableName()." (fk_c_country_code, i_num_items) VALUES ('$countryCode', $numItems) ON DUPLICATE KEY UPDATE i_num_items = ".$numItems);
        }

        /**
         * Find stats by country code
         * 
         * @access public
         * @since 2.4
         * @param int $countryCode country id 
         * @return array 
         */
        public function findByCountryCode($countryCode) 
        {
            return $this->findByPrimaryKey($countryCode);
        }
        
        
        /**
         * Return a list of countries and counter items.
         * Can be filtered by num_items,
         * and ordered by country_name or items counter.
         * $order = 'country_name ASC' OR $oder = 'items DESC'
         *
         * @access public
         * @since 2.4
         * @param string $zero
         * @param string $order
         * @return array 
         */
        public function listCountries($zero = ">", $order = "country_name ASC")
        {
            $this->dao->select($this->getTableName().'.fk_c_country_code as country_code, '.$this->getTableName().'.i_num_items as items, '.DB_TABLE_PREFIX.'t_country.s_name as country_name') ;
            $this->dao->from($this->getTableName() ) ;
            $this->dao->join(DB_TABLE_PREFIX.'t_country', $this->getTableName().'.fk_c_country_code = '.DB_TABLE_PREFIX.'t_country.pk_c_code') ;
            $this->dao->where('i_num_items '.$zero.' 0' ) ;
            $this->dao->orderBy($order) ;
            
            $rs = $this->dao->get() ;
            
            if($rs === false) {
                return array() ;
            }
            return $rs->result() ;
        }
        
        /**
         * Calculate the total items that belong to countryCode 
         * @access public
         * @since 2.4
         * @param type $countryCode
         * @return int total items
         */
        function calculateNumItems($countryCode)
        {
            $sql  = 'SELECT count(*) as total FROM '.DB_TABLE_PREFIX.'t_item_location, '.DB_TABLE_PREFIX.'t_item, '.DB_TABLE_PREFIX.'t_category ' ;
            $sql .= 'WHERE '.DB_TABLE_PREFIX.'t_item_location.fk_c_country_code = \''.$countryCode.'\' AND ' ;
            $sql .= DB_TABLE_PREFIX.'t_item.pk_i_id = '.DB_TABLE_PREFIX.'t_item_location.fk_i_item_id AND ' ;
            $sql .= DB_TABLE_PREFIX.'t_category.pk_i_id = '.DB_TABLE_PREFIX.'t_item.fk_i_category_id AND ' ;
            $sql .= DB_TABLE_PREFIX.'t_item.b_active = 1 AND '.DB_TABLE_PREFIX.'t_item.b_enabled = 1 AND '.DB_TABLE_PREFIX.'t_item.b_spam = 0 AND ' ;
            $sql .= '('.DB_TABLE_PREFIX.'t_item.b_premium = 1 || '.DB_TABLE_PREFIX.'t_item.dt_expiration >= \''.date('Y-m-d H:i:s').'\' ) AND ' ;
            $sql .= DB_TABLE_PREFIX.'t_category.b_enabled = 1 ' ;

            $return = $this->dao->query($sql);
            if($return === false) {
                return 0;
            }
            
            if($return->numRows() > 0) {
                $aux = $return->result() ;
                return $aux[0]['total'] ;
            }
            
            return 0;
        }
    }

    /* file end: ./oc-includes/osclass/model/CountryStats.php */
?>