<?php

namespace DoctrineExtensions\Query\Mysql;

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

/**
 * @author Rafael Kassner <kassner@gmail.com>
 * @author Sarjono Mukti Aji <me@simukti.net>
 * @author Łukasz Nowicki <lukasz.mnowicki@gmail.com>
 */
class Week extends FunctionNode
{
    public $date;
    public $mode;

    public function getSql(\Doctrine\ORM\Query\SqlWalker $sqlWalker)
    {
        $sql = "WEEK(" . $sqlWalker->walkArithmeticPrimary($this->date);
        if ($this->mode != null) {
            $sql .= ", " . $sqlWalker->walkLiteral($this->mode);
        }
        $sql .= ")";

        return $sql;
    }

    public function parse(\Doctrine\ORM\Query\Parser $parser)
    {
        $parser->match(Lexer::T_IDENTIFIER);
        $parser->match(Lexer::T_OPEN_PARENTHESIS);

        $this->date = $parser->ArithmeticPrimary();

        if (Lexer::T_COMMA === $parser->getLexer()->lookahead['type']) {
            $parser->match(Lexer::T_COMMA);
            $this->mode = $parser->Literal();
        }

        $parser->match(Lexer::T_CLOSE_PARENTHESIS);
    }
}
