<?php

class AdvConstructorHook extends ObjectModel
{
    public $id_advconstructor_hook;
    public $id_advconstructor;
    public $id_hook;
    public $position = 0;

    public static $definition = array(
        'table' => 'advconstructor_hook',
        'primary' => 'id_advconstructor_hook',
        'fields' => array(
            'id_advconstructor' => array(
                'type' => ObjectModel :: TYPE_INT
            ),
            'id_hook' => array(
                'type' => ObjectModel :: TYPE_INT
            ),
            'position' => array(
                'type' => ObjectModel :: TYPE_INT
            )
        )
    );

    public function updatePosition($way, $position) 
    {
        $sql = 'SELECT `position`, `id_advconstructor_hook`
                FROM `'._DB_PREFIX_.'advconstructor_hook`
                WHERE `id_hook` = '.(int)$this->id_hook.'
                ORDER BY `position` ASC';
        $res = Db::getInstance()->executeS($sql);
        if (!$res)
            return false;

        foreach ($res as $row)
            if ((int)$row['id_advconstructor_hook'] == (int)$this->id)
                $moved_row = $row;

        if (!isset($moved_row) || !isset($position))
            return false;

        // < and > statements rather than BETWEEN operator
        // since BETWEEN is treated differently according to databases
        $res = Db::getInstance()->execute('
            UPDATE `'._DB_PREFIX_.'advconstructor_hook`
            SET `position`= `position` '.($way ? '- 1' : '+ 1').'
            WHERE `id_hook` = '.(int)$this->id_hook.'
            AND `position`
            '.($way
                ? '> '.(int)$moved_row['position'].' AND `position` <= '.(int)$position
                : '< '.(int)$moved_row['position'].' AND `position` >= '.(int)$position)
        )
         && Db::getInstance()->execute('
            UPDATE `'._DB_PREFIX_.'advconstructor_hook`
            SET `position` = '.(int)$position.'
            WHERE `id_advconstructor_hook`='.(int)$moved_row['id_advconstructor_hook']
        );
        $this->refreshPositions();

        return $res;
    }

    public function refreshPositions(){
        $sql = 'SELECT `id_advconstructor_hook`
                FROM `'._DB_PREFIX_.'advconstructor_hook`
                WHERE `id_hook` = '.(int)$this->id_hook.'
                ORDER BY `position` ASC';
        if (!$blocks = Db::getInstance()->executeS($sql))
            return false;

        $pos=0;
        foreach ($blocks as $block) {
            Db::getInstance()->execute('
                UPDATE `'._DB_PREFIX_.'advconstructor_hook`
                SET `position` = '.(int)$pos.'
                WHERE `id_advconstructor_hook`='.(int)$block['id_advconstructor_hook']);
            $pos++;
        }
    }

    public static function associationHookExist( $id_advconstructor, $id_hook )
    {
        $sql = 'SELECT `id_advconstructor_hook`
                FROM `'._DB_PREFIX_.'advconstructor_hook`
                WHERE `id_hook` = '.(int) $id_hook.'
                AND `id_advconstructor` = '.(int) $id_advconstructor;
        if (!$id = Db::getInstance()->getRow($sql)) {
            return false;
        } else {
            return $id['id_advconstructor_hook'];
        }
    }
}