Puli\Repository\AbstractPathMappingRepository

Complexity

Total Complexity

40

Size/Duplication

Total Lines	340
Duplicated Lines	3.24 %

Coupling/Cohesion

Components	1
Dependencies	13

Test Coverage

Coverage

99.01%

Importance

Changes	12
Bugs	4	Features	5

19 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	7	1
	addFilesystemResource()	0	1	?
	addLinkResource()	0	1	?
A	clear()	0	10	1
A	createRoot()	0	8	2
A	createLinkResource()	0	7	1
A	createVirtualResource()	0	7	1
A	resolveRelativePath()	0	9	2
A	isLinkTarget()	0	4	1
A	add()	11	20	3
C	addResource()	0	26	7
A	ensureDirectoryExists()	0	13	3
A	countStore()	0	8	2
A	sortStore()	0	8	2
A	createResource()	0	18	4
A	createFilesystemResource()	0	21	4
A	resolveRelativePaths()	0	8	2
A	createLinkTarget()	0	8	2
A	getLinkTarget()	0	8	2

<?php

/*
 * This file is part of the puli/repository package.
 *
 * (c) Bernhard Schussek <bschussek@gmail.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Puli\Repository;

use Puli\Repository\Api\Resource\FilesystemResource;
use Puli\Repository\Api\Resource\PuliResource;
use Puli\Repository\Api\ResourceCollection;
use Puli\Repository\Api\UnsupportedResourceException;
use Puli\Repository\Resource\DirectoryResource;
use Puli\Repository\Resource\FileResource;
use Puli\Repository\Resource\GenericResource;
use Puli\Repository\Resource\LinkResource;
use RuntimeException;
use Webmozart\KeyValueStore\Api\CountableStore;
use Webmozart\KeyValueStore\Api\KeyValueStore;
use Webmozart\KeyValueStore\Api\SortableStore;
use Webmozart\KeyValueStore\Decorator\CountableDecorator;
use Webmozart\KeyValueStore\Decorator\SortableDecorator;
use Webmozart\PathUtil\Path;

/**
 * Abstract base for Path mapping repositories.
 *
 * @since  1.0
 *
 * @author Bernhard Schussek <bschussek@gmail.com>
 * @author Titouan Galopin <galopintitouan@gmail.com>
 */
abstract class AbstractPathMappingRepository extends AbstractRepository
{
    /**
     * @var KeyValueStore
     */
    protected $store;

    /**
     * @var string
     */
    protected $baseDirectory;

    /**
     * Creates a new repository.
     *
     * @param KeyValueStore $store         The store of all the paths.
     * @param string        $baseDirectory The store of all the paths.
     */
    public function __construct(KeyValueStore $store, $baseDirectory)
    {
        $this->store = $store;
        $this->baseDirectory = $baseDirectory;

        $this->createRoot();
    }

    /**
     * {@inheritdoc}
     */
    public function add($path, $resource)
    {
        $path = $this->sanitizePath($path);

        if ($resource instanceof ResourceCollection) {
            $this->ensureDirectoryExists($path);

            foreach ($resource as $child) {
                $this->addResource($path.'/'.$child->getName(), $child);
            }

            $this->sortStore();

            return;
        }

        $this->ensureDirectoryExists(Path::getDirectory($path));
        $this->addResource($path, $resource);
        $this->sortStore();
    }

    /**
     * Add the resource (internal method after checks of add()).
     *
     * @param string       $path
     * @param PuliResource $resource
     */
    private function addResource($path, $resource)
    {
        if (!($resource instanceof FilesystemResource || $resource instanceof LinkResource)) {
            throw new UnsupportedResourceException(sprintf(
                'PathMapping repositories only supports FilesystemResource and LinkedResource. Got: %s',
                is_object($resource) ? get_class($resource) : gettype($resource)
            ));
        }

        // Don't modify resources attached to other repositories
        if ($resource->isAttached()) {
            $resource = clone $resource;
        }

        if ($resource instanceof LinkResource) {
            $this->addLinkResource($path, $resource);
        } elseif (Path::isBasePath($this->baseDirectory, $resource->getFilesystemPath())) {
            $this->addFilesystemResource($path, $resource);
        } else {
            throw new UnsupportedResourceException(sprintf(
                'Can only add resources from %s. Tried to add %s.',
                $this->baseDirectory,
                $resource->getFilesystemPath()
            ));
        }
    }

    /**
     * Add the filesystem resource.
     *
     * @param string             $path
     * @param FilesystemResource $resource
     */
    abstract protected function addFilesystemResource($path, FilesystemResource $resource);

    /**
     * Add the link resource.
     *
     * @param string       $path
     * @param LinkResource $resource
     */
    abstract protected function addLinkResource($path, LinkResource $resource);

    /**
     * {@inheritdoc}
     */
    public function clear()
    {
        // Subtract root
        $removed = $this->countStore() - 1;

        $this->store->clear();
        $this->createRoot();

        return $removed;
    }

    /**
     * Recursively creates a directory for a path.
     *
     * @param string $path A directory path.
     */
    protected function ensureDirectoryExists($path)
    {
        if ($this->store->exists($path)) {
            return;
        }

        // Recursively initialize parent directories
        if ('/' !== $path) {
            $this->ensureDirectoryExists(Path::getDirectory($path));
        }

        $this->store->set($path, null);
    }

    /**
     * Create the repository root.
     */
    protected function createRoot()
    {
        if ($this->store->exists('/')) {
            return;
        }

        $this->store->set('/', null);
    }

    /**
     * Count the number of elements in the store.
     *
     * @return int
     */
    protected function countStore()
    {
        if (!$this->store instanceof CountableStore) {
            $this->store = new CountableDecorator($this->store);
        }

        return $this->store->count();
    }

    /**
     * Sort the store by keys.
     */
    protected function sortStore()
    {
        if (!$this->store instanceof SortableStore) {
            $this->store = new SortableDecorator($this->store);
        }

        $this->store->sort();
    }

    /**
     * Create a filesystem or generic resource.
     *
     * @param string|null $filesystemPath
     *
     * @return DirectoryResource|FileResource|GenericResource
     */
    protected function createResource($filesystemPath, $path = null)
    {
        // Link resource
        if (0 === strpos($filesystemPath, 'l:')) {
            return $this->createLinkResource(substr($filesystemPath, 2), $path);
        }

        // Filesystem resource
        if (is_string($filesystemPath)) {
            $filesystemPath = $this->resolveRelativePath($filesystemPath);

            if (file_exists($filesystemPath)) {
                return $this->createFilesystemResource($filesystemPath, $path);
            }
        }

        return $this->createVirtualResource($path);
    }

    /**
     * Create a link resource to another resource of the repository.
     *
     * @param string      $targetPath The target path.
     * @param string|null $path       The repository path.
     *
     * @return LinkResource The link resource.
     *
     * @throws RuntimeException If the targeted resource does not exist.
     */
    protected function createLinkResource($targetPath, $path = null)
    {
        $resource = new LinkResource($targetPath);
        $resource->attachTo($this, $path);

        return $resource;
    }

    /**
     * Create a resource using its filesystem path.
     *
     * If the filesystem path is a directory, a DirectoryResource will be created.
     * If the filesystem path is a file, a FileResource will be created.
     * If the filesystem does not exists, a GenericResource will be created.
     *
     * @param string      $filesystemPath The filesystem path.
     * @param string|null $path           The repository path.
     *
     * @return DirectoryResource|FileResource The created resource.
     *
     * @throws RuntimeException If the file / directory does not exist.
     */
    protected function createFilesystemResource($filesystemPath, $path = null)
    {
        $resource = null;

        if (is_dir($filesystemPath)) {
            $resource = new DirectoryResource($filesystemPath);
        } elseif (is_file($filesystemPath)) {
            $resource = new FileResource($filesystemPath);
        }

        if ($resource) {
            $resource->attachTo($this, $path);

            return $resource;
        }

        throw new RuntimeException(sprintf(
            'Trying to create a FilesystemResource on a non-existing file or directory "%s"',
            $filesystemPath
        ));
    }

    /**
     * @param string|null $path
     *
     * @return GenericResource
     */
    protected function createVirtualResource($path = null)
    {
        $resource = new GenericResource();
        $resource->attachTo($this, $path);

        return $resource;
    }

    /**
     * Transform a relative path into an absolute path.
     *
     * @param string $relativePath
     *
     * @return string
     */
    protected function resolveRelativePath($relativePath)
    {
        if (0 === strpos($relativePath, 'l:')) {
            // Link
            return $relativePath;
        }

        return Path::makeAbsolute($relativePath, $this->baseDirectory);
    }

    /**
     * Transform a collection of relative paths into a collection of absolute paths.
     *
     * @param string[] $relativePaths
     *
     * @return string[]
     */
    protected function resolveRelativePaths($relativePaths)
    {
        foreach ($relativePaths as $key => $relativePath) {
            $relativePaths[$key] = $this->resolveRelativePath($relativePath);
        }

        return $relativePaths;
    }

    /**
     * Check if the given target path represents a link.
     *
     * @param string $targetPath
     *
     * @return bool
     */
    protected function isLinkTarget($targetPath)
    {
        return 0 === strpos($targetPath, 'l:');
    }

    /**
     * Add a link tag at the beginning of the given target path to represent a link.
     *
     * @param string $targetPath
     *
     * @return string
     */
    protected function createLinkTarget($targetPath)
    {
        if (!$this->isLinkTarget($targetPath)) {
            $targetPath = 'l:'.$targetPath;
        }

        return $targetPath;
    }

    /**
     * Get the target path of a link by removing the link tag.
     *
     * @param string $targetPath
     *
     * @return string
     */
    protected function getLinkTarget($targetPath)
    {
        if ($this->isLinkTarget($targetPath)) {
            $targetPath = substr($targetPath, 2);
        }

        return $targetPath;
    }
}