Phuria\UnderQuery\QueryCompiler\ReferenceCompiler

Complexity

Total Complexity

14

Size/Duplication

Total Lines	104
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	6

Test Coverage

Coverage

0%

Importance

Changes

0

6 Methods

Rating	Name	Duplication	Size	Complexity
A	compileReference()	0	13	2
A	compile()	0	8	2
A	replace()	0	10	2
A	convertReferenceToValue()	0	8	2
A	convertScalarReference()	0	8	2
A	convertObjectReference()	0	15	4

<?php

/**
 * This file is part of UnderQuery package.
 *
 * Copyright (c) 2016 Beniamin Jonatan Šimko
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Phuria\UnderQuery\QueryCompiler;

use Phuria\UnderQuery\Language\Expression\RelativeClause;
use Phuria\UnderQuery\QueryBuilder\AbstractBuilder;
use Phuria\UnderQuery\QueryBuilder\BuilderInterface;
use Phuria\UnderQuery\Table\AbstractTable;

/**
 * @author Beniamin Jonatan Šimko <spam@simko.it>
 */
class ReferenceCompiler
{
    /**
     * @param CompilerPayload $payload
     *
     * @return CompilerPayload
     */
    public function compileReference(CompilerPayload $payload)
    {
        $builder = $payload->getBuilder();
        $references = [];

        if ($builder instanceof AbstractBuilder) {
            $references = $builder->getReferences()->toArray();
        }

        $actualSQL = $this->compile($payload->getActualSQL(), $references);

        return $payload->updateSQL($actualSQL);
    }

    /**
     * @param string $rawSQL
     * @param array  $references
     *
     * @return string
     */
    public function compile($rawSQL, array $references)
    {
        foreach ($references as &$value) {
            $value = $this->convertReferenceToValue($value);
        }

        return $this->replace($rawSQL, $references);
    }

    /**
     * TODO: hardfixed, refactor needed
     *
     * @param string $rawSQL
     * @param array  $references
     *
     * @return string
     */
    private function replace($rawSQL, $references)
    {
        $result = str_replace(array_keys($references), array_values($references), $rawSQL);

        if (false === strpos($result, '@ref[')) {
            return $result;
        } else {
            return $this->replace($result, $references);
        }
    }

    /**
     * @param $reference
     *
     * @return string
     */
    private function convertReferenceToValue($reference)
    {
        if (is_scalar($reference)) {
            return $this->convertScalarReference($reference);
        } else {
            return $this->convertObjectReference($reference);
        }
    }

    /**
     * @param $reference
     *
     * @return string
     */
    private function convertScalarReference($reference)
    {
        if (is_string($reference)) {
            return "\"" . $reference ."\"";
        }

        return $reference;
    }

    /**
     * @param mixed $reference
     *
     * @return string
     */
    private function convertObjectReference($reference)
    {
        if ($reference instanceof AbstractTable) {
            return $reference->getAliasOrName();
        } elseif ($reference instanceof BuilderInterface) {
            return $reference->buildSQL();
        } elseif ($reference instanceof RelativeClause) {
            $table = $this->convertObjectReference($reference->getRelatedTable());
            $clause = $this->convertObjectReference($reference->getClause());

            return str_replace($reference->getDirective(), $table . '.', $clause);
        }

        return $reference;
    }
}