<?php

/*
 * Chill is a software for social workers
 * Copyright (C) 2015 Champs-Libres Coopérative <info@champs-libres.coop>
 *
 * 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/>.
 */

namespace Chill\MainBundle\Doctrine\DQL;

use Doctrine\ORM\Query\AST\Functions\FunctionNode;
use Doctrine\ORM\Query\Lexer;

/**
 * Unaccent string using postgresql extension unaccent : 
 * http://www.postgresql.org/docs/current/static/unaccent.html
 * 
 * Usage : StringFunction UNACCENT(string)
 *
 * @author Julien Fastré <julien.fastre@champs-libres.coop>
 */
class Unaccent extends FunctionNode
{
    private $string;
    
    public function getSql(\Doctrine\ORM\Query\SqlWalker $sqlWalker)
    {
        return 'UNACCENT(' . $this->string->dispatch($sqlWalker) .")";
    }

    public function parse(\Doctrine\ORM\Query\Parser $parser)
    {
        $parser->match(Lexer::T_IDENTIFIER);
        $parser->match(Lexer::T_OPEN_PARENTHESIS);
        
        $this->string = $parser->StringPrimary();
        
        $parser->match(Lexer::T_CLOSE_PARENTHESIS);
    }

}