<?php

/*
 +------------------------------------------------------------------------+
 | Phalcon Framework                                                      |
 +------------------------------------------------------------------------+
 | Copyright (c) 2011-2017 Phalcon Team (https://www.phalconphp.com)      |
 +------------------------------------------------------------------------+
 | This source file is subject to the New BSD License that is bundled     |
 | with this package in the file LICENSE.txt.                             |
 |                                                                        |
 | If you did not receive a copy of the license and are unable to         |
 | obtain it through the world-wide-web, please send an email             |
 | to license@phalconphp.com so we can send you a copy immediately.       |
 +------------------------------------------------------------------------+
 | Authors: Andres Gutierrez <andres@phalconphp.com>                      |
 |          Eduar Carvajal <eduar@phalconphp.com>                         |
 +------------------------------------------------------------------------+
 */

namespace Zephir\Optimizers\FunctionCall;

use Zephir\Call;
use Zephir\CompilationContext;
use Zephir\CompilerException;
use Zephir\CompiledExpression;
use Zephir\Optimizers\OptimizerAbstract;

/**
 * Zephir\Optimizers\FunctionCall\PhalconEscapeCssOptimizer
 *
 * @package Zephir\Optimizers\FunctionCall
 */
class PhalconEscapeCssOptimizer extends OptimizerAbstract
{
    /**
     * @param array $expression
     * @param Call $call
     * @param CompilationContext $context
     * @return bool|CompiledExpression
     *
     * @throws CompilerException
     */
    public function optimize(array $expression, Call $call, CompilationContext $context)
    {
        if (!isset($expression['parameters'])) {
            return false;
        }

        if (count($expression['parameters']) != 1) {
            throw new CompilerException("phalcon_escape_css only accepts one parameter", $expression);
        }

        /**
         * Process the expected symbol to be returned
         */
        $call->processExpectedReturn($context);

        $symbolVariable = $call->getSymbolVariable();
        if ($symbolVariable->getType() != 'variable') {
            throw new CompilerException(
                "Returned values by functions can only be assigned to variant variables",
                $expression
            );
        }

        if ($call->mustInitSymbolVariable()) {
            $symbolVariable->initVariant($context);
        }

        $context->headersManager->add('kernel/filter');

        $resolvedParams = $call->getResolvedParams($expression['parameters'], $context, $expression);
        $context->codePrinter->output('zephir_escape_css(' . $symbolVariable->getName() . ', ' . $resolvedParams[0] . ');');
        return new CompiledExpression('variable', $symbolVariable->getRealName(), $expression);
    }

}
