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Passed
Push — master ( d69b2a...936a10 )
by Oliver
56s
created

BaseNameResolver::resolveBaseName()   A

Complexity

Conditions 6
Paths 5

Size

Total Lines 18
Code Lines 10

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
cc 6
eloc 10
nc 5
nop 2
dl 0
loc 18
rs 9.2222
c 0
b 0
f 0
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<?php
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declare(strict_types=1);
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namespace TYPO3\PharStreamWrapper\Resolver;
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/*
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 * This file is part of the TYPO3 project.
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 *
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 * It is free software; you can redistribute it and/or modify it under the terms
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 * of the MIT License (MIT). For the full copyright and license information,
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 * please read the LICENSE file that was distributed with this source code.
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 *
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 * The TYPO3 project - inspiring people to share!
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 */
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use TYPO3\PharStreamWrapper\Helper;
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use TYPO3\PharStreamWrapper\Phar\Reader;
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use TYPO3\PharStreamWrapper\Resolvable;
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class BaseNameResolver implements Resolvable
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{
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    const RESOLVE_REALPATH = 1;
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    const RESOLVE_ALIAS = 2;
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    /**
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     * @var string[]
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     */
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    private $aliasMap = [];
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    /**
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     * @param string $path
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     * @param int|null $flags
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     * @return null|string
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     */
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    public function resolveBaseName(string $path, int $flags = null)
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    {
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        $hasPharPrefix = Helper::hasPharPrefix($path);
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        $flags = $flags ?? static::RESOLVE_REALPATH | static::RESOLVE_ALIAS;
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        if ($hasPharPrefix && $flags & static::RESOLVE_ALIAS) {
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            $baseNameFromAliasMap = $this->resolveBaseNameFromAliasMap($path);
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            if ($baseNameFromAliasMap !== null) {
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                return $baseNameFromAliasMap;
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            }
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        }
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        $baseName = Helper::determineBaseFile($path);
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        if ($baseName !== null && $flags & static::RESOLVE_REALPATH) {
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            $baseName = realpath($baseName);
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        }
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        return $baseName;
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    }
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    /**
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     * @param string $path
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     * @return null|string
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     */
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    private function resolveBaseNameFromAliasMap(string $path)
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    {
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        $normalizedBaseName = Helper::normalizePath($path);
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        $possibleAlias = strstr($normalizedBaseName, '/', true);
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        return $this->getAlias($possibleAlias ?: '');
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    }
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    /**
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     * @param string $path
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     * @param int|null $flags
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     * @return bool
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     */
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    public function learnAlias(string $path, int $flags = null): bool
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    {
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        $flags = $flags ?? static::RESOLVE_REALPATH;
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        $baseName = Helper::determineBaseFile($path);
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        if ($baseName === null) {
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            return false;
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        }
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        if ($flags & static::RESOLVE_REALPATH) {
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            $baseName = realpath($baseName);
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        }
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        $alias = (new Reader($baseName))->resolveContainer()->getAlias();
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        if ($alias === '' || $alias === $baseName) {
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            return false;
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        }
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        $this->setAlias($alias, $baseName);
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        return true;
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    }
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    /**
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     * @param string $alias
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     * @return null|string
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     */
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    private function getAlias(string $alias)
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    {
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        return $this->aliasMap[$alias] ?? null;
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    }
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    /**
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     * Updates alias map for current Phar archive.
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     *
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     * Since Phar aliases are intended to be used only inside Phar archives,
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     * there is no further check for duplicates in our alias map.
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     *
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     * @param string $alias
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     * @param string $basePath
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     * @see https://secure.php.net/manual/en/phar.setalias.php
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     * @see https://secure.php.net/manual/en/phar.mapphar.php
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     */
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    private function setAlias(string $alias, string $basePath)
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    {
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        $this->aliasMap[$alias] = $basePath;
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    }
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}
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