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<?php

/*
 * This file is part of Composer.
 *
 * (c) Nils Adermann <naderman@naderman.de>
 *     Jordi Boggiano <j.boggiano@seld.be>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Composer\Repository;

use Composer\Package\BasePackage;
use Composer\Package\Loader\ArrayLoader;
use Composer\Package\PackageInterface;
use Composer\Package\AliasPackage;
use Composer\Package\CompletePackage;
use Composer\Package\CompleteAliasPackage;
use Composer\Package\Version\VersionParser;
use Composer\Package\Version\StabilityFilter;
use Composer\Json\JsonFile;
use Composer\Cache;
use Composer\Config;
use Composer\IO\IOInterface;
use Composer\Pcre\Preg;
use Composer\Plugin\PostFileDownloadEvent;
use Composer\Semver\CompilingMatcher;
use Composer\Util\HttpDownloader;
use Composer\Util\Loop;
use Composer\Plugin\PluginEvents;
use Composer\Plugin\PreFileDownloadEvent;
use Composer\EventDispatcher\EventDispatcher;
use Composer\Downloader\TransportException;
use Composer\Semver\Constraint\ConstraintInterface;
use Composer\Semver\Constraint\Constraint;
use Composer\Semver\Constraint\MatchAllConstraint;
use Composer\Util\Http\Response;
use Composer\MetadataMinifier\MetadataMinifier;
use Composer\Util\Url;

/**
 * @author Jordi Boggiano <j.boggiano@seld.be>
 */
class ComposerRepository extends ArrayRepository implements ConfigurableRepositoryInterface
{
    /**
     * @var mixed[]
     * @phpstan-var array{url: string, options?: mixed[], type?: 'composer', allow_ssl_downgrade?: bool}
     */
    private $repoConfig;
    /** @var mixed[] */
    private $options;
    /** @var string */
    private $url;
    /** @var string */
    private $baseUrl;
    /** @var IOInterface */
    private $io;
    /** @var HttpDownloader */
    private $httpDownloader;
    /** @var Loop */
    private $loop;
    /** @var Cache */
    protected $cache;
    /** @var ?string */
    protected $notifyUrl = null;
    /** @var ?string */
    protected $searchUrl = null;
    /** @var ?string a URL containing %package% which can be queried to get providers of a given name */
    protected $providersApiUrl = null;
    /** @var bool */
    protected $hasProviders = false;
    /** @var ?string */
    protected $providersUrl = null;
    /** @var ?string */
    protected $listUrl = null;
    /** @var bool Indicates whether a comprehensive list of packages this repository might provide is expressed in the repository root. **/
    protected $hasAvailablePackageList = false;
    /** @var ?array<string> */
    protected $availablePackages = null;
    /** @var ?array<non-empty-string> */
    protected $availablePackagePatterns = null;
    /** @var ?string */
    protected $lazyProvidersUrl = null;
    /** @var ?array<string, array{sha256: string}> */
    protected $providerListing;
    /** @var ArrayLoader */
    protected $loader;
    /** @var bool */
    private $allowSslDowngrade = false;
    /** @var ?EventDispatcher */
    private $eventDispatcher;
    /** @var ?array<string, array<int, array{url: string, preferred: bool}>> */
    private $sourceMirrors;
    /** @var ?array<int, array{url: string, preferred: bool}> */
    private $distMirrors;
    /** @var bool */
    private $degradedMode = false;
    /** @var mixed[]|true */
    private $rootData;
    /** @var bool */
    private $hasPartialPackages = false;
    /** @var ?array<string, mixed[]> */
    private $partialPackagesByName = null;

    /**
     * TODO v3 should make this private once we can drop PHP 5.3 support
     * @private
     * @var array list of package names which are fresh and can be loaded from the cache directly in case loadPackage is called several times
     *            useful for v2 metadata repositories with lazy providers
     * @phpstan-var array<string, true>
     */
    public $freshMetadataUrls = array();

    /**
     * TODO v3 should make this private once we can drop PHP 5.3 support
     * @private
     * @var array list of package names which returned a 404 and should not be re-fetched in case loadPackage is called several times
     *            useful for v2 metadata repositories with lazy providers
     * @phpstan-var array<string, true>
     */
    public $packagesNotFoundCache = array();
    /**
     * TODO v3 should make this private once we can drop PHP 5.3 support
     * @private
     * @var VersionParser
     */
    public $versionParser;

    /**
     * @param array<string, mixed> $repoConfig
     * @phpstan-param array{url: string, options?: mixed[], type?: 'composer', allow_ssl_downgrade?: bool} $repoConfig
     */
    public function __construct(array $repoConfig, IOInterface $io, Config $config, HttpDownloader $httpDownloader, EventDispatcher $eventDispatcher = null)
    {
        parent::__construct();
        if (!Preg::isMatch('{^[\w.]+\??://}', $repoConfig['url'])) {
            // assume http as the default protocol
            $repoConfig['url'] = 'http://'.$repoConfig['url'];
        }
        $repoConfig['url'] = rtrim($repoConfig['url'], '/');

        if (strpos($repoConfig['url'], 'https?') === 0) {
            $repoConfig['url'] = (extension_loaded('openssl') ? 'https' : 'http') . substr($repoConfig['url'], 6);
        }

        $urlBits = parse_url($repoConfig['url']);
        if ($urlBits === false || empty($urlBits['scheme'])) {
            throw new \UnexpectedValueException('Invalid url given for Composer repository: '.$repoConfig['url']);
        }

        if (!isset($repoConfig['options'])) {
            $repoConfig['options'] = array();
        }
        if (isset($repoConfig['allow_ssl_downgrade']) && true === $repoConfig['allow_ssl_downgrade']) {
            $this->allowSslDowngrade = true;
        }

        $this->options = $repoConfig['options'];
        $this->url = $repoConfig['url'];

        // force url for packagist.org to repo.packagist.org
        if (Preg::isMatch('{^(?P<proto>https?)://packagist\.org/?$}i', $this->url, $match)) {
            $this->url = $match['proto'].'://repo.packagist.org';
        }

        $this->baseUrl = rtrim(Preg::replace('{(?:/[^/\\\\]+\.json)?(?:[?#].*)?$}', '', $this->url), '/');
        $this->io = $io;
        $this->cache = new Cache($io, $config->get('cache-repo-dir').'/'.Preg::replace('{[^a-z0-9.]}i', '-', Url::sanitize($this->url)), 'a-z0-9.$~');
        $this->cache->setReadOnly($config->get('cache-read-only'));
        $this->versionParser = new VersionParser();
        $this->loader = new ArrayLoader($this->versionParser);
        $this->httpDownloader = $httpDownloader;
        $this->eventDispatcher = $eventDispatcher;
        $this->repoConfig = $repoConfig;
        $this->loop = new Loop($this->httpDownloader);
    }

    public function getRepoName()
    {
        return 'composer repo ('.Url::sanitize($this->url).')';
    }

    public function getRepoConfig()
    {
        return $this->repoConfig;
    }

    /**
     * @inheritDoc
     */
    public function findPackage($name, $constraint)
    {
        // this call initializes loadRootServerFile which is needed for the rest below to work
        $hasProviders = $this->hasProviders();

        $name = strtolower($name);
        if (!$constraint instanceof ConstraintInterface) {
            $constraint = $this->versionParser->parseConstraints($constraint);
        }

        if ($this->lazyProvidersUrl) {
            if ($this->hasPartialPackages() && isset($this->partialPackagesByName[$name])) {
                return $this->filterPackages($this->whatProvides($name), $constraint, true);
            }

            if ($this->hasAvailablePackageList && !$this->lazyProvidersRepoContains($name)) {
                return null;
            }

            $packages = $this->loadAsyncPackages(array($name => $constraint));

            return reset($packages['packages']);
        }

        if ($hasProviders) {
            foreach ($this->getProviderNames() as $providerName) {
                if ($name === $providerName) {
                    return $this->filterPackages($this->whatProvides($providerName), $constraint, true);
                }
            }

            return null;
        }

        return parent::findPackage($name, $constraint);
    }

    /**
     * @inheritDoc
     */
    public function findPackages($name, $constraint = null)
    {
        // this call initializes loadRootServerFile which is needed for the rest below to work
        $hasProviders = $this->hasProviders();

        $name = strtolower($name);
        if (null !== $constraint && !$constraint instanceof ConstraintInterface) {
            $constraint = $this->versionParser->parseConstraints($constraint);
        }

        if ($this->lazyProvidersUrl) {
            if ($this->hasPartialPackages() && isset($this->partialPackagesByName[$name])) {
                return $this->filterPackages($this->whatProvides($name), $constraint);
            }

            if ($this->hasAvailablePackageList && !$this->lazyProvidersRepoContains($name)) {
                return array();
            }

            $result = $this->loadAsyncPackages(array($name => $constraint));

            return $result['packages'];
        }

        if ($hasProviders) {
            foreach ($this->getProviderNames() as $providerName) {
                if ($name === $providerName) {
                    return $this->filterPackages($this->whatProvides($providerName), $constraint);
                }
            }

            return array();
        }

        return parent::findPackages($name, $constraint);
    }

    /**
     * @param array<BasePackage> $packages
     * @param ConstraintInterface|null $constraint
     * @param bool $returnFirstMatch
     *
     * @return BasePackage|array<BasePackage>|null
     */
    private function filterPackages(array $packages, $constraint = null, $returnFirstMatch = false)
    {
        if (null === $constraint) {
            if ($returnFirstMatch) {
                return reset($packages);
            }

            return $packages;
        }

        $filteredPackages = array();

        foreach ($packages as $package) {
            $pkgConstraint = new Constraint('==', $package->getVersion());

            if ($constraint->matches($pkgConstraint)) {
                if ($returnFirstMatch) {
                    return $package;
                }

                $filteredPackages[] = $package;
            }
        }

        if ($returnFirstMatch) {
            return null;
        }

        return $filteredPackages;
    }

    public function getPackages()
    {
        $hasProviders = $this->hasProviders();

        if ($this->lazyProvidersUrl) {
            if (is_array($this->availablePackages) && !$this->availablePackagePatterns) {
                $packageMap = array();
                foreach ($this->availablePackages as $name) {
                    $packageMap[$name] = new MatchAllConstraint();
                }

                $result = $this->loadAsyncPackages($packageMap);

                return array_values($result['packages']);
            }

            if ($this->hasPartialPackages()) {
                if (!is_array($this->partialPackagesByName)) {
                    throw new \LogicException('hasPartialPackages failed to initialize $this->partialPackagesByName');
                }
                return $this->createPackages($this->partialPackagesByName, 'packages.json inline packages');
            }

            throw new \LogicException('Composer repositories that have lazy providers and no available-packages list can not load the complete list of packages, use getPackageNames instead.');
        }

        if ($hasProviders) {
            throw new \LogicException('Composer repositories that have providers can not load the complete list of packages, use getPackageNames instead.');
        }

        return parent::getPackages();
    }

    /**
     * @param string|null $packageFilter Package pattern filter which can include "*" as a wildcard
     *
     * @return string[]
     */
    public function getPackageNames($packageFilter = null)
    {
        $hasProviders = $this->hasProviders();

        $filterResults =
            /**
             * @param list<string> $results
             * @return list<string>
             */
            function (array $results) {
                return $results;
            }
        ;
        if (null !== $packageFilter && '' !== $packageFilter) {
            $packageFilterRegex = BasePackage::packageNameToRegexp($packageFilter);
            $filterResults =
                /**
                 * @param list<string> $results
                 * @return list<string>
                 */
                function (array $results) use ($packageFilterRegex) {
                    /** @var list<string> $results */
                    return Preg::grep($packageFilterRegex, $results);
                }
            ;
        }

        if ($this->lazyProvidersUrl) {
            if (is_array($this->availablePackages)) {
                return $filterResults(array_keys($this->availablePackages));
            }

            if ($this->listUrl) {
                // no need to call $filterResults here as the $packageFilter is applied in the function itself
                return $this->loadPackageList($packageFilter);
            }

            if ($this->hasPartialPackages() && $this->partialPackagesByName !== null) {
                return $filterResults(array_keys($this->partialPackagesByName));
            }

            return array();
        }

        if ($hasProviders) {
            return $filterResults($this->getProviderNames());
        }

        $names = array();
        foreach ($this->getPackages() as $package) {
            $names[] = $package->getPrettyName();
        }

        return $filterResults($names);
    }

    /**
     * @return list<string>
     */
    private function getVendorNames()
    {
        $cacheKey = 'vendor-list.txt';
        $cacheAge = $this->cache->getAge($cacheKey);
        if (false !== $cacheAge && $cacheAge < 600 && ($cachedData = $this->cache->read($cacheKey)) !== false) {
            $cachedData = explode("\n", $cachedData);

            return $cachedData;
        }

        $names = $this->getPackageNames();

        $uniques = array();
        foreach ($names as $name) {
            // @phpstan-ignore-next-line
            $uniques[substr($name, 0, strpos($name, '/'))] = true;
        }

        $vendors = array_keys($uniques);

        if (!$this->cache->isReadOnly()) {
            $this->cache->write($cacheKey, implode("\n", $vendors));
        }

        return $vendors;
    }

    /**
     * @param string|null $packageFilter
     * @return list<string>
     */
    private function loadPackageList($packageFilter = null)
    {
        if (null === $this->listUrl) {
            throw new \LogicException('Make sure to call loadRootServerFile before loadPackageList');
        }

        $url = $this->listUrl;
        if (is_string($packageFilter) && $packageFilter !== '') {
            $url .= '?filter='.urlencode($packageFilter);
            $result = $this->httpDownloader->get($url, $this->options)->decodeJson();

            return $result['packageNames'];
        }

        $cacheKey = 'package-list.txt';
        $cacheAge = $this->cache->getAge($cacheKey);
        if (false !== $cacheAge && $cacheAge < 600 && ($cachedData = $this->cache->read($cacheKey)) !== false) {
            $cachedData = explode("\n", $cachedData);

            return $cachedData;
        }

        $result = $this->httpDownloader->get($url, $this->options)->decodeJson();
        if (!$this->cache->isReadOnly()) {
            $this->cache->write($cacheKey, implode("\n", $result['packageNames']));
        }

        return $result['packageNames'];
    }

    public function loadPackages(array $packageNameMap, array $acceptableStabilities, array $stabilityFlags, array $alreadyLoaded = array())
    {
        // this call initializes loadRootServerFile which is needed for the rest below to work
        $hasProviders = $this->hasProviders();

        if (!$hasProviders && !$this->hasPartialPackages() && !$this->lazyProvidersUrl) {
            return parent::loadPackages($packageNameMap, $acceptableStabilities, $stabilityFlags, $alreadyLoaded);
        }

        $packages = array();
        $namesFound = array();

        if ($hasProviders || $this->hasPartialPackages()) {
            foreach ($packageNameMap as $name => $constraint) {
                $matches = array();

                // if a repo has no providers but only partial packages and the partial packages are missing
                // then we don't want to call whatProvides as it would try to load from the providers and fail
                if (!$hasProviders && !isset($this->partialPackagesByName[$name])) {
                    continue;
                }

                $candidates = $this->whatProvides($name, $acceptableStabilities, $stabilityFlags, $alreadyLoaded);
                foreach ($candidates as $candidate) {
                    if ($candidate->getName() !== $name) {
                        throw new \LogicException('whatProvides should never return a package with a different name than the requested one');
                    }
                    $namesFound[$name] = true;

                    if (!$constraint || $constraint->matches(new Constraint('==', $candidate->getVersion()))) {
                        $matches[spl_object_hash($candidate)] = $candidate;
                        if ($candidate instanceof AliasPackage && !isset($matches[spl_object_hash($candidate->getAliasOf())])) {
                            $matches[spl_object_hash($candidate->getAliasOf())] = $candidate->getAliasOf();
                        }
                    }
                }

                // add aliases of matched packages even if they did not match the constraint
                foreach ($candidates as $candidate) {
                    if ($candidate instanceof AliasPackage) {
                        if (isset($matches[spl_object_hash($candidate->getAliasOf())])) {
                            $matches[spl_object_hash($candidate)] = $candidate;
                        }
                    }
                }
                $packages = array_merge($packages, $matches);

                unset($packageNameMap[$name]);
            }
        }

        if ($this->lazyProvidersUrl && count($packageNameMap)) {
            if ($this->hasAvailablePackageList) {
                foreach ($packageNameMap as $name => $constraint) {
                    if (!$this->lazyProvidersRepoContains(strtolower($name))) {
                        unset($packageNameMap[$name]);
                    }
                }
            }

            $result = $this->loadAsyncPackages($packageNameMap, $acceptableStabilities, $stabilityFlags, $alreadyLoaded);
            $packages = array_merge($packages, $result['packages']);
            $namesFound = array_merge($namesFound, $result['namesFound']);
        }

        return array('namesFound' => array_keys($namesFound), 'packages' => $packages);
    }

    /**
     * @inheritDoc
     */
    public function search($query, $mode = 0, $type = null)
    {
        $this->loadRootServerFile(600);

        if ($this->searchUrl && $mode === self::SEARCH_FULLTEXT) {
            $url = str_replace(array('%query%', '%type%'), array(urlencode($query), $type), $this->searchUrl);

            $search = $this->httpDownloader->get($url, $this->options)->decodeJson();

            if (empty($search['results'])) {
                return array();
            }

            $results = array();
            foreach ($search['results'] as $result) {
                // do not show virtual packages in results as they are not directly useful from a composer perspective
                if (!empty($result['virtual'])) {
                    continue;
                }

                $results[] = $result;
            }

            return $results;
        }

        if ($mode === self::SEARCH_VENDOR) {
            $results = array();
            $regex = '{(?:'.implode('|', Preg::split('{\s+}', $query)).')}i';

            $vendorNames = $this->getVendorNames();
            foreach (Preg::grep($regex, $vendorNames) as $name) {
                $results[] = array('name' => $name, 'description' => '');
            }

            return $results;
        }

        if ($this->hasProviders() || $this->lazyProvidersUrl) {
            // optimize search for "^foo/bar" where at least "^foo/" is present by loading this directly from the listUrl if present
            if (Preg::isMatch('{^\^(?P<query>(?P<vendor>[a-z0-9_.-]+)/[a-z0-9_.-]*)\*?$}i', $query, $match) && $this->listUrl !== null) {
                $url = $this->listUrl . '?vendor='.urlencode($match['vendor']).'&filter='.urlencode($match['query'].'*');
                $result = $this->httpDownloader->get($url, $this->options)->decodeJson();

                $results = array();
                foreach ($result['packageNames'] as $name) {
                    $results[] = array('name' => $name, 'description' => '');
                }

                return $results;
            }

            $results = array();
            $regex = '{(?:'.implode('|', Preg::split('{\s+}', $query)).')}i';

            $packageNames = $this->getPackageNames();
            foreach (Preg::grep($regex, $packageNames) as $name) {
                $results[] = array('name' => $name, 'description' => '');
            }

            return $results;
        }

        return parent::search($query, $mode);
    }

    public function getProviders($packageName)
    {
        $this->loadRootServerFile();
        $result = array();

        if ($this->providersApiUrl) {
            $apiResult = $this->httpDownloader->get(str_replace('%package%', $packageName, $this->providersApiUrl), $this->options)->decodeJson();

            foreach ($apiResult['providers'] as $provider) {
                $result[$provider['name']] = $provider;
            }

            return $result;
        }

        if ($this->hasPartialPackages()) {
            if (!is_array($this->partialPackagesByName)) {
                throw new \LogicException('hasPartialPackages failed to initialize $this->partialPackagesByName');
            }
            foreach ($this->partialPackagesByName as $versions) {
                foreach ($versions as $candidate) {
                    if (isset($result[$candidate['name']]) || !isset($candidate['provide'][$packageName])) {
                        continue;
                    }
                    $result[$candidate['name']] = array(
                        'name' => $candidate['name'],
                        'description' => isset($candidate['description']) ? $candidate['description'] : '',
                        'type' => isset($candidate['type']) ? $candidate['type'] : '',
                    );
                }
            }
        }

        if ($this->packages) {
            $result = array_merge($result, parent::getProviders($packageName));
        }

        return $result;
    }

    /**
     * @return string[]
     */
    private function getProviderNames()
    {
        $this->loadRootServerFile();

        if (null === $this->providerListing) {
            $this->loadProviderListings($this->loadRootServerFile());
        }

        if ($this->lazyProvidersUrl) {
            // Can not determine list of provided packages for lazy repositories
            return array();
        }

        if ($this->providersUrl) {
            return array_keys($this->providerListing);
        }

        return array();
    }

    /**
     * @return void
     */
    protected function configurePackageTransportOptions(PackageInterface $package)
    {
        foreach ($package->getDistUrls() as $url) {
            if (strpos($url, $this->baseUrl) === 0) {
                $package->setTransportOptions($this->options);

                return;
            }
        }
    }

    /**
     * @return bool
     */
    private function hasProviders()
    {
        $this->loadRootServerFile();

        return $this->hasProviders;
    }

    /**
     * @param  string      $name package name
     * @param array<string, int>|null $acceptableStabilities
     * @phpstan-param array<string, BasePackage::STABILITY_*>|null $acceptableStabilities
     * @param array<string, int>|null $stabilityFlags an array of package name => BasePackage::STABILITY_* value
     * @phpstan-param array<string, BasePackage::STABILITY_*>|null $stabilityFlags
     * @param array<string, array<string, PackageInterface>> $alreadyLoaded
     *
     * @return array<string, BasePackage>
     */
    private function whatProvides($name, array $acceptableStabilities = null, array $stabilityFlags = null, array $alreadyLoaded = array())
    {
        $packagesSource = null;
        if (!$this->hasPartialPackages() || !isset($this->partialPackagesByName[$name])) {
            // skip platform packages, root package and composer-plugin-api
            if (PlatformRepository::isPlatformPackage($name) || '__root__' === $name) {
                return array();
            }

            if (null === $this->providerListing) {
                $this->loadProviderListings($this->loadRootServerFile());
            }

            $useLastModifiedCheck = false;
            if ($this->lazyProvidersUrl && !isset($this->providerListing[$name])) {
                $hash = null;
                $url = str_replace('%package%', $name, $this->lazyProvidersUrl);
                $cacheKey = 'provider-'.strtr($name, '/', '$').'.json';
                $useLastModifiedCheck = true;
            } elseif ($this->providersUrl) {
                // package does not exist in this repo
                if (!isset($this->providerListing[$name])) {
                    return array();
                }

                $hash = $this->providerListing[$name]['sha256'];
                $url = str_replace(array('%package%', '%hash%'), array($name, $hash), $this->providersUrl);
                $cacheKey = 'provider-'.strtr($name, '/', '$').'.json';
            } else {
                return array();
            }

            $packages = null;
            if (!$useLastModifiedCheck && $hash && $this->cache->sha256($cacheKey) === $hash) {
                $packages = json_decode($this->cache->read($cacheKey), true);
                $packagesSource = 'cached file ('.$cacheKey.' originating from '.Url::sanitize($url).')';
            } elseif ($useLastModifiedCheck) {
                if ($contents = $this->cache->read($cacheKey)) {
                    $contents = json_decode($contents, true);
                    // we already loaded some packages from this file, so assume it is fresh and avoid fetching it again
                    if (isset($alreadyLoaded[$name])) {
                        $packages = $contents;
                        $packagesSource = 'cached file ('.$cacheKey.' originating from '.Url::sanitize($url).')';
                    } elseif (isset($contents['last-modified'])) {
                        $response = $this->fetchFileIfLastModified($url, $cacheKey, $contents['last-modified']);
                        $packages = true === $response ? $contents : $response;
                        $packagesSource = true === $response ? 'cached file ('.$cacheKey.' originating from '.Url::sanitize($url).')' : 'downloaded file ('.Url::sanitize($url).')';
                    }
                }
            }

            if (!$packages) {
                try {
                    $packages = $this->fetchFile($url, $cacheKey, $hash, $useLastModifiedCheck);
                    $packagesSource = 'downloaded file ('.Url::sanitize($url).')';
                } catch (TransportException $e) {
                    // 404s are acceptable for lazy provider repos
                    if ($this->lazyProvidersUrl && in_array($e->getStatusCode(), array(404, 499), true)) {
                        $packages = array('packages' => array());
                        $packagesSource = 'not-found file ('.Url::sanitize($url).')';
                        if ($e->getStatusCode() === 499) {
                            $this->io->error('<warning>' . $e->getMessage() . '</warning>');
                        }
                    } else {
                        throw $e;
                    }
                }
            }

            $loadingPartialPackage = false;
        } else {
            $packages = array('packages' => array('versions' => $this->partialPackagesByName[$name]));
            $packagesSource = 'root file ('.Url::sanitize($this->getPackagesJsonUrl()).')';
            $loadingPartialPackage = true;
        }

        $result = array();
        $versionsToLoad = array();
        foreach ($packages['packages'] as $versions) {
            foreach ($versions as $version) {
                $normalizedName = strtolower($version['name']);

                // only load the actual named package, not other packages that might find themselves in the same file
                if ($normalizedName !== $name) {
                    continue;
                }

                if (!$loadingPartialPackage && $this->hasPartialPackages() && isset($this->partialPackagesByName[$normalizedName])) {
                    continue;
                }

                if (!isset($versionsToLoad[$version['uid']])) {
                    if (!isset($version['version_normalized'])) {
                        $version['version_normalized'] = $this->versionParser->normalize($version['version']);
                    } elseif ($version['version_normalized'] === VersionParser::DEFAULT_BRANCH_ALIAS) {
                        // handling of existing repos which need to remain composer v1 compatible, in case the version_normalized contained VersionParser::DEFAULT_BRANCH_ALIAS, we renormalize it
                        $version['version_normalized'] = $this->versionParser->normalize($version['version']);
                    }

                    // avoid loading packages which have already been loaded
                    if (isset($alreadyLoaded[$name][$version['version_normalized']])) {
                        continue;
                    }

                    if ($this->isVersionAcceptable(null, $normalizedName, $version, $acceptableStabilities, $stabilityFlags)) {
                        $versionsToLoad[$version['uid']] = $version;
                    }
                }
            }
        }

        // load acceptable packages in the providers
        $loadedPackages = $this->createPackages($versionsToLoad, $packagesSource);
        $uids = array_keys($versionsToLoad);

        foreach ($loadedPackages as $index => $package) {
            $package->setRepository($this);
            $uid = $uids[$index];

            if ($package instanceof AliasPackage) {
                $aliased = $package->getAliasOf();
                $aliased->setRepository($this);

                $result[$uid] = $aliased;
                $result[$uid.'-alias'] = $package;
            } else {
                $result[$uid] = $package;
            }
        }

        return $result;
    }

    /**
     * @inheritDoc
     */
    protected function initialize()
    {
        parent::initialize();

        $repoData = $this->loadDataFromServer();

        foreach ($this->createPackages($repoData, 'root file ('.Url::sanitize($this->getPackagesJsonUrl()).')') as $package) {
            $this->addPackage($package);
        }
    }

    /**
     * Adds a new package to the repository
     *
     * @param PackageInterface $package
     */
    public function addPackage(PackageInterface $package)
    {
        parent::addPackage($package);
        $this->configurePackageTransportOptions($package);
    }

    /**
     * @param array<string, ConstraintInterface|null> $packageNames array of package name => ConstraintInterface|null - if a constraint is provided, only packages matching it will be loaded
     * @param array<string, int>|null $acceptableStabilities
     * @phpstan-param array<string, BasePackage::STABILITY_*>|null $acceptableStabilities
     * @param array<string, int>|null $stabilityFlags an array of package name => BasePackage::STABILITY_* value
     * @phpstan-param array<string, BasePackage::STABILITY_*>|null $stabilityFlags
     * @param array<string, array<string, PackageInterface>> $alreadyLoaded
     *
     * @return array{namesFound: array<string, true>, packages: array<string, BasePackage>}
     */
    private function loadAsyncPackages(array $packageNames, array $acceptableStabilities = null, array $stabilityFlags = null, array $alreadyLoaded = array())
    {
        $this->loadRootServerFile();

        $packages = array();
        $namesFound = array();
        $promises = array();
        $repo = $this;

        if (!$this->lazyProvidersUrl) {
            throw new \LogicException('loadAsyncPackages only supports v2 protocol composer repos with a metadata-url');
        }

        // load ~dev versions of the packages as well if needed
        foreach ($packageNames as $name => $constraint) {
            if ($acceptableStabilities === null || $stabilityFlags === null || StabilityFilter::isPackageAcceptable($acceptableStabilities, $stabilityFlags, array($name), 'dev')) {
                $packageNames[$name.'~dev'] = $constraint;
            }
            // if only dev stability is requested, we skip loading the non dev file
            if (isset($acceptableStabilities['dev']) && count($acceptableStabilities) === 1 && count($stabilityFlags) === 0) {
                unset($packageNames[$name]);
            }
        }

        foreach ($packageNames as $name => $constraint) {
            $name = strtolower($name);

            $realName = Preg::replace('{~dev$}', '', $name);
            // skip platform packages, root package and composer-plugin-api
            if (PlatformRepository::isPlatformPackage($realName) || '__root__' === $realName) {
                continue;
            }

            $url = str_replace('%package%', $name, $this->lazyProvidersUrl);
            $cacheKey = 'provider-'.strtr($name, '/', '~').'.json';

            $lastModified = null;
            if ($contents = $this->cache->read($cacheKey)) {
                $contents = json_decode($contents, true);
                $lastModified = isset($contents['last-modified']) ? $contents['last-modified'] : null;
            }

            $promises[] = $this->asyncFetchFile($url, $cacheKey, $lastModified)
                ->then(function ($response) use (&$packages, &$namesFound, $url, $cacheKey, $contents, $realName, $constraint, $repo, $acceptableStabilities, $stabilityFlags, $alreadyLoaded) {
                    $packagesSource = 'downloaded file ('.Url::sanitize($url).')';

                    if (true === $response) {
                        $packagesSource = 'cached file ('.$cacheKey.' originating from '.Url::sanitize($url).')';
                        $response = $contents;
                    }

                    if (!isset($response['packages'][$realName])) {
                        return;
                    }

                    $versions = $response['packages'][$realName];

                    if (isset($response['minified']) && $response['minified'] === 'composer/2.0') {
                        $versions = MetadataMinifier::expand($versions);
                    }

                    $namesFound[$realName] = true;
                    $versionsToLoad = array();
                    foreach ($versions as $version) {
                        if (!isset($version['version_normalized'])) {
                            $version['version_normalized'] = $repo->versionParser->normalize($version['version']);
                        } elseif ($version['version_normalized'] === VersionParser::DEFAULT_BRANCH_ALIAS) {
                            // handling of existing repos which need to remain composer v1 compatible, in case the version_normalized contained VersionParser::DEFAULT_BRANCH_ALIAS, we renormalize it
                            $version['version_normalized'] = $repo->versionParser->normalize($version['version']);
                        }

                        // avoid loading packages which have already been loaded
                        if (isset($alreadyLoaded[$realName][$version['version_normalized']])) {
                            continue;
                        }

                        if ($repo->isVersionAcceptable($constraint, $realName, $version, $acceptableStabilities, $stabilityFlags)) {
                            $versionsToLoad[] = $version;
                        }
                    }

                    $loadedPackages = $repo->createPackages($versionsToLoad, $packagesSource);
                    foreach ($loadedPackages as $package) {
                        $package->setRepository($repo);
                        $packages[spl_object_hash($package)] = $package;

                        if ($package instanceof AliasPackage && !isset($packages[spl_object_hash($package->getAliasOf())])) {
                            $package->getAliasOf()->setRepository($repo);
                            $packages[spl_object_hash($package->getAliasOf())] = $package->getAliasOf();
                        }
                    }
                });
        }

        $this->loop->wait($promises);

        return array('namesFound' => $namesFound, 'packages' => $packages);
        // RepositorySet should call loadMetadata, getMetadata when all promises resolved, then metadataComplete when done so we can GC the loaded json and whatnot then as needed
    }

    /**
     * TODO v3 should make this private once we can drop PHP 5.3 support
     *
     * @private
     *
     * @param ConstraintInterface|null $constraint
     * @param string $name package name (must be lowercased already)
     * @param array<string, mixed> $versionData
     * @param array<string, int>|null $acceptableStabilities
     * @phpstan-param array<string, BasePackage::STABILITY_*>|null $acceptableStabilities
     * @param array<string, int>|null $stabilityFlags an array of package name => BasePackage::STABILITY_* value
     * @phpstan-param array<string, BasePackage::STABILITY_*>|null $stabilityFlags
     *
     * @return bool
     */
    public function isVersionAcceptable($constraint, $name, $versionData, array $acceptableStabilities = null, array $stabilityFlags = null)
    {
        $versions = array($versionData['version_normalized']);

        if ($alias = $this->loader->getBranchAlias($versionData)) {
            $versions[] = $alias;
        }

        foreach ($versions as $version) {
            if (null !== $acceptableStabilities && null !== $stabilityFlags && !StabilityFilter::isPackageAcceptable($acceptableStabilities, $stabilityFlags, array($name), VersionParser::parseStability($version))) {
                continue;
            }

            if ($constraint && !CompilingMatcher::match($constraint, Constraint::OP_EQ, $version)) {
                continue;
            }

            return true;
        }

        return false;
    }

    /**
     * @return string
     */
    private function getPackagesJsonUrl()
    {
        $jsonUrlParts = parse_url($this->url);

        if (isset($jsonUrlParts['path']) && false !== strpos($jsonUrlParts['path'], '.json')) {
            return $this->url;
        }

        return $this->url . '/packages.json';
    }

    /**
     * @param int|null $rootMaxAge
     * @return array<string, mixed>
     */
    protected function loadRootServerFile($rootMaxAge = null)
    {
        if (null !== $this->rootData) {
            return $this->rootData;
        }

        if (!extension_loaded('openssl') && strpos($this->url, 'https') === 0) {
            throw new \RuntimeException('You must enable the openssl extension in your php.ini to load information from '.$this->url);
        }

        if ($cachedData = $this->cache->read('packages.json')) {
            $cachedData = json_decode($cachedData, true);
            if ($rootMaxAge !== null && ($age = $this->cache->getAge('packages.json')) !== false && $age <= $rootMaxAge) {
                $data = $cachedData;
            } elseif (isset($cachedData['last-modified'])) {
                $response = $this->fetchFileIfLastModified($this->getPackagesJsonUrl(), 'packages.json', $cachedData['last-modified']);
                $data = true === $response ? $cachedData : $response;
            }
        }

        if (!isset($data)) {
            $data = $this->fetchFile($this->getPackagesJsonUrl(), 'packages.json', null, true);
        }

        if (!empty($data['notify-batch'])) {
            $this->notifyUrl = $this->canonicalizeUrl($data['notify-batch']);
        } elseif (!empty($data['notify'])) {
            $this->notifyUrl = $this->canonicalizeUrl($data['notify']);
        }

        if (!empty($data['search'])) {
            $this->searchUrl = $this->canonicalizeUrl($data['search']);
        }

        if (!empty($data['mirrors'])) {
            foreach ($data['mirrors'] as $mirror) {
                if (!empty($mirror['git-url'])) {
                    $this->sourceMirrors['git'][] = array('url' => $mirror['git-url'], 'preferred' => !empty($mirror['preferred']));
                }
                if (!empty($mirror['hg-url'])) {
                    $this->sourceMirrors['hg'][] = array('url' => $mirror['hg-url'], 'preferred' => !empty($mirror['preferred']));
                }
                if (!empty($mirror['dist-url'])) {
                    $this->distMirrors[] = array(
                        'url' => $this->canonicalizeUrl($mirror['dist-url']),
                        'preferred' => !empty($mirror['preferred']),
                    );
                }
            }
        }

        if (!empty($data['providers-lazy-url'])) {
            $this->lazyProvidersUrl = $this->canonicalizeUrl($data['providers-lazy-url']);
            $this->hasProviders = true;

            $this->hasPartialPackages = !empty($data['packages']) && is_array($data['packages']);
        }

        // metadata-url indicates V2 repo protocol so it takes over from all the V1 types
        // V2 only has lazyProviders and possibly partial packages, but no ability to process anything else,
        // V2 also supports async loading
        if (!empty($data['metadata-url'])) {
            $this->lazyProvidersUrl = $this->canonicalizeUrl($data['metadata-url']);
            $this->providersUrl = null;
            $this->hasProviders = false;
            $this->hasPartialPackages = !empty($data['packages']) && is_array($data['packages']);
            $this->allowSslDowngrade = false;

            // provides a list of package names that are available in this repo
            // this disables lazy-provider behavior in the sense that if a list is available we assume it is finite and won't search for other packages in that repo
            // while if no list is there lazyProvidersUrl is used when looking for any package name to see if the repo knows it
            if (!empty($data['available-packages'])) {
                $availPackages = array_map('strtolower', $data['available-packages']);
                $this->availablePackages = array_combine($availPackages, $availPackages);
                $this->hasAvailablePackageList = true;
            }

            // Provides a list of package name patterns (using * wildcards to match any substring, e.g. "vendor/*") that are available in this repo
            // Disables lazy-provider behavior as with available-packages, but may allow much more compact expression of packages covered by this repository.
            // Over-specifying covered packages is safe, but may result in increased traffic to your repository.
            if (!empty($data['available-package-patterns'])) {
                $this->availablePackagePatterns = array_map(function ($pattern) {
                    return BasePackage::packageNameToRegexp($pattern);
                }, $data['available-package-patterns']);
                $this->hasAvailablePackageList = true;
            }

            // Remove legacy keys as most repos need to be compatible with Composer v1
            // as well but we are not interested in the old format anymore at this point
            unset($data['providers-url'], $data['providers'], $data['providers-includes']);
        }

        if ($this->allowSslDowngrade) {
            $this->url = str_replace('https://', 'http://', $this->url);
            $this->baseUrl = str_replace('https://', 'http://', $this->baseUrl);
        }

        if (!empty($data['providers-url'])) {
            $this->providersUrl = $this->canonicalizeUrl($data['providers-url']);
            $this->hasProviders = true;
        }

        if (!empty($data['list'])) {
            $this->listUrl = $this->canonicalizeUrl($data['list']);
        }

        if (!empty($data['providers']) || !empty($data['providers-includes'])) {
            $this->hasProviders = true;
        }

        if (!empty($data['providers-api'])) {
            $this->providersApiUrl = $this->canonicalizeUrl($data['providers-api']);
        }

        return $this->rootData = $data;
    }

    /**
     * @param string $url
     *
     * @return string
     */
    private function canonicalizeUrl($url)
    {
        if ('/' === $url[0]) {
            if (Preg::isMatch('{^[^:]++://[^/]*+}', $this->url, $matches)) {
                return $matches[0] . $url;
            }

            return $this->url;
        }

        return $url;
    }

    /**
     * @return mixed[]
     */
    private function loadDataFromServer()
    {
        $data = $this->loadRootServerFile();

        return $this->loadIncludes($data);
    }

    /**
     * @return bool
     */
    private function hasPartialPackages()
    {
        if ($this->hasPartialPackages && null === $this->partialPackagesByName) {
            $this->initializePartialPackages();
        }

        return $this->hasPartialPackages;
    }

    /**
     * @param array{providers?: mixed[], provider-includes?: mixed[]} $data
     *
     * @return void
     */
    private function loadProviderListings($data)
    {
        if (isset($data['providers'])) {
            if (!is_array($this->providerListing)) {
                $this->providerListing = array();
            }
            $this->providerListing = array_merge($this->providerListing, $data['providers']);
        }

        if ($this->providersUrl && isset($data['provider-includes'])) {
            $includes = $data['provider-includes'];
            foreach ($includes as $include => $metadata) {
                $url = $this->baseUrl . '/' . str_replace('%hash%', $metadata['sha256'], $include);
                $cacheKey = str_replace(array('%hash%','$'), '', $include);
                if ($this->cache->sha256($cacheKey) === $metadata['sha256']) {
                    $includedData = json_decode($this->cache->read($cacheKey), true);
                } else {
                    $includedData = $this->fetchFile($url, $cacheKey, $metadata['sha256']);
                }

                $this->loadProviderListings($includedData);
            }
        }
    }

    /**
     * @param mixed[] $data
     *
     * @return mixed[]
     */
    private function loadIncludes($data)
    {
        $packages = array();

        // legacy repo handling
        if (!isset($data['packages']) && !isset($data['includes'])) {
            foreach ($data as $pkg) {
                if (isset($pkg['versions']) && is_array($pkg['versions'])) {
                    foreach ($pkg['versions'] as $metadata) {
                        $packages[] = $metadata;
                    }
                }
            }

            return $packages;
        }

        if (isset($data['packages'])) {
            foreach ($data['packages'] as $package => $versions) {
                foreach ($versions as $version => $metadata) {
                    $packages[] = $metadata;
                }
            }
        }

        if (isset($data['includes'])) {
            foreach ($data['includes'] as $include => $metadata) {
                if (isset($metadata['sha1']) && $this->cache->sha1((string) $include) === $metadata['sha1']) {
                    $includedData = json_decode($this->cache->read((string) $include), true);
                } else {
                    $includedData = $this->fetchFile($include);
                }
                $packages = array_merge($packages, $this->loadIncludes($includedData));
            }
        }

        return $packages;
    }

    /**
     * TODO v3 should make this private once we can drop PHP 5.3 support
     * @private
     *
     * @param mixed[] $packages
     * @param string|null $source
     *
     * @return list<CompletePackage|CompleteAliasPackage>
     */
    public function createPackages(array $packages, $source = null)
    {
        if (!$packages) {
            return array();
        }

        try {
            foreach ($packages as &$data) {
                if (!isset($data['notification-url'])) {
                    $data['notification-url'] = $this->notifyUrl;
                }
            }

            $packageInstances = $this->loader->loadPackages($packages);

            foreach ($packageInstances as $package) {
                if (isset($this->sourceMirrors[$package->getSourceType()])) {
                    $package->setSourceMirrors($this->sourceMirrors[$package->getSourceType()]);
                }
                $package->setDistMirrors($this->distMirrors);
                $this->configurePackageTransportOptions($package);
            }

            return $packageInstances;
        } catch (\Exception $e) {
            throw new \RuntimeException('Could not load packages '.(isset($packages[0]['name']) ? $packages[0]['name'] : json_encode($packages)).' in '.$this->getRepoName().($source ? ' from '.$source : '').': ['.get_class($e).'] '.$e->getMessage(), 0, $e);
        }
    }

    /**
     * @param string $filename
     * @param string|null $cacheKey
     * @param string|null $sha256
     * @param bool $storeLastModifiedTime
     *
     * @return array<mixed>
     */
    protected function fetchFile($filename, $cacheKey = null, $sha256 = null, $storeLastModifiedTime = false)
    {
        if (null === $cacheKey) {
            $cacheKey = $filename;
            $filename = $this->baseUrl.'/'.$filename;
        }

        // url-encode $ signs in URLs as bad proxies choke on them
        if (($pos = strpos($filename, '$')) && Preg::isMatch('{^https?://}i', $filename)) {
            $filename = substr($filename, 0, $pos) . '%24' . substr($filename, $pos + 1);
        }

        $retries = 3;
        while ($retries--) {
            try {
                $options = $this->options;
                if ($this->eventDispatcher) {
                    $preFileDownloadEvent = new PreFileDownloadEvent(PluginEvents::PRE_FILE_DOWNLOAD, $this->httpDownloader, $filename, 'metadata', array('repository' => $this));
                    $preFileDownloadEvent->setTransportOptions($this->options);
                    $this->eventDispatcher->dispatch($preFileDownloadEvent->getName(), $preFileDownloadEvent);
                    $filename = $preFileDownloadEvent->getProcessedUrl();
                    $options = $preFileDownloadEvent->getTransportOptions();
                }

                $response = $this->httpDownloader->get($filename, $options);
                $json = (string) $response->getBody();
                if ($sha256 && $sha256 !== hash('sha256', $json)) {
                    // undo downgrade before trying again if http seems to be hijacked or modifying content somehow
                    if ($this->allowSslDowngrade) {
                        $this->url = str_replace('http://', 'https://', $this->url);
                        $this->baseUrl = str_replace('http://', 'https://', $this->baseUrl);
                        $filename = str_replace('http://', 'https://', $filename);
                    }

                    if ($retries > 0) {
                        usleep(100000);

                        continue;
                    }

                    // TODO use scarier wording once we know for sure it doesn't do false positives anymore
                    throw new RepositorySecurityException('The contents of '.$filename.' do not match its signature. This could indicate a man-in-the-middle attack or e.g. antivirus software corrupting files. Try running composer again and report this if you think it is a mistake.');
                }

                if ($this->eventDispatcher) {
                    $postFileDownloadEvent = new PostFileDownloadEvent(PluginEvents::POST_FILE_DOWNLOAD, null, $sha256, $filename, 'metadata', array('response' => $response, 'repository' => $this));
                    $this->eventDispatcher->dispatch($postFileDownloadEvent->getName(), $postFileDownloadEvent);
                }

                $data = $response->decodeJson();
                HttpDownloader::outputWarnings($this->io, $this->url, $data);

                if ($cacheKey && !$this->cache->isReadOnly()) {
                    if ($storeLastModifiedTime) {
                        $lastModifiedDate = $response->getHeader('last-modified');
                        if ($lastModifiedDate) {
                            $data['last-modified'] = $lastModifiedDate;
                            $json = JsonFile::encode($data, 0);
                        }
                    }
                    $this->cache->write($cacheKey, $json);
                }

                $response->collect();

                break;
            } catch (\Exception $e) {
                if ($e instanceof \LogicException) {
                    throw $e;
                }

                if ($e instanceof TransportException && $e->getStatusCode() === 404) {
                    throw $e;
                }

                if ($e instanceof RepositorySecurityException) {
                    throw $e;
                }

                if ($cacheKey && ($contents = $this->cache->read($cacheKey))) {
                    if (!$this->degradedMode) {
                        $this->io->writeError('<warning>'.$this->url.' could not be fully loaded ('.$e->getMessage().'), package information was loaded from the local cache and may be out of date</warning>');
                    }
                    $this->degradedMode = true;
                    $data = JsonFile::parseJson($contents, $this->cache->getRoot().$cacheKey);

                    break;
                }

                throw $e;
            }
        }

        if (!isset($data)) {
            throw new \LogicException("ComposerRepository: Undefined \$data. Please report at https://github.com/composer/composer/issues/new.");
        }

        return $data;
    }

    /**
     * @param string $filename
     * @param string $cacheKey
     * @param string $lastModifiedTime
     *
     * @return array<mixed>|true
     */
    private function fetchFileIfLastModified($filename, $cacheKey, $lastModifiedTime)
    {
        try {
            $options = $this->options;
            if ($this->eventDispatcher) {
                $preFileDownloadEvent = new PreFileDownloadEvent(PluginEvents::PRE_FILE_DOWNLOAD, $this->httpDownloader, $filename, 'metadata', array('repository' => $this));
                $preFileDownloadEvent->setTransportOptions($this->options);
                $this->eventDispatcher->dispatch($preFileDownloadEvent->getName(), $preFileDownloadEvent);
                $filename = $preFileDownloadEvent->getProcessedUrl();
                $options = $preFileDownloadEvent->getTransportOptions();
            }

            if (isset($options['http']['header'])) {
                $options['http']['header'] = (array) $options['http']['header'];
            }
            $options['http']['header'][] = 'If-Modified-Since: '.$lastModifiedTime;
            $response = $this->httpDownloader->get($filename, $options);
            $json = (string) $response->getBody();
            if ($json === '' && $response->getStatusCode() === 304) {
                return true;
            }

            if ($this->eventDispatcher) {
                $postFileDownloadEvent = new PostFileDownloadEvent(PluginEvents::POST_FILE_DOWNLOAD, null, null, $filename, 'metadata', array('response' => $response, 'repository' => $this));
                $this->eventDispatcher->dispatch($postFileDownloadEvent->getName(), $postFileDownloadEvent);
            }

            $data = $response->decodeJson();
            HttpDownloader::outputWarnings($this->io, $this->url, $data);

            $lastModifiedDate = $response->getHeader('last-modified');
            $response->collect();
            if ($lastModifiedDate) {
                $data['last-modified'] = $lastModifiedDate;
                $json = JsonFile::encode($data, 0);
            }
            if (!$this->cache->isReadOnly()) {
                $this->cache->write($cacheKey, $json);
            }

            return $data;
        } catch (\Exception $e) {
            if ($e instanceof \LogicException) {
                throw $e;
            }

            if ($e instanceof TransportException && $e->getStatusCode() === 404) {
                throw $e;
            }

            if (!$this->degradedMode) {
                $this->io->writeError('<warning>'.$this->url.' could not be fully loaded ('.$e->getMessage().'), package information was loaded from the local cache and may be out of date</warning>');
            }
            $this->degradedMode = true;

            return true;
        }
    }

    /**
     * @param string $filename
     * @param string $cacheKey
     * @param string|null $lastModifiedTime
     *
     * @return \React\Promise\PromiseInterface
     */
    private function asyncFetchFile($filename, $cacheKey, $lastModifiedTime = null)
    {
        if (isset($this->packagesNotFoundCache[$filename])) {
            return \React\Promise\resolve(array('packages' => array()));
        }

        if (isset($this->freshMetadataUrls[$filename]) && $lastModifiedTime) {
            // make it look like we got a 304 response
            return \React\Promise\resolve(true);
        }

        $httpDownloader = $this->httpDownloader;
        $options = $this->options;
        if ($this->eventDispatcher) {
            $preFileDownloadEvent = new PreFileDownloadEvent(PluginEvents::PRE_FILE_DOWNLOAD, $this->httpDownloader, $filename, 'metadata', array('repository' => $this));
            $preFileDownloadEvent->setTransportOptions($this->options);
            $this->eventDispatcher->dispatch($preFileDownloadEvent->getName(), $preFileDownloadEvent);
            $filename = $preFileDownloadEvent->getProcessedUrl();
            $options = $preFileDownloadEvent->getTransportOptions();
        }

        if ($lastModifiedTime) {
            if (isset($options['http']['header'])) {
                $options['http']['header'] = (array) $options['http']['header'];
            }
            $options['http']['header'][] = 'If-Modified-Since: '.$lastModifiedTime;
        }

        $io = $this->io;
        $url = $this->url;
        $cache = $this->cache;
        $degradedMode = &$this->degradedMode;
        $eventDispatcher = $this->eventDispatcher;
        $repo = $this;

        $accept = function ($response) use ($io, $url, $filename, $cache, $cacheKey, $eventDispatcher, $repo) {
            // package not found is acceptable for a v2 protocol repository
            if ($response->getStatusCode() === 404) {
                $repo->packagesNotFoundCache[$filename] = true;

                return array('packages' => array());
            }

            $json = (string) $response->getBody();
            if ($json === '' && $response->getStatusCode() === 304) {
                $repo->freshMetadataUrls[$filename] = true;

                return true;
            }

            if ($eventDispatcher) {
                $postFileDownloadEvent = new PostFileDownloadEvent(PluginEvents::POST_FILE_DOWNLOAD, null, null, $filename, 'metadata', array('response' => $response, 'repository' => $repo));
                $eventDispatcher->dispatch($postFileDownloadEvent->getName(), $postFileDownloadEvent);
            }

            $data = $response->decodeJson();
            HttpDownloader::outputWarnings($io, $url, $data);

            $lastModifiedDate = $response->getHeader('last-modified');
            $response->collect();
            if ($lastModifiedDate) {
                $data['last-modified'] = $lastModifiedDate;
                $json = JsonFile::encode($data, JsonFile::JSON_UNESCAPED_SLASHES | JsonFile::JSON_UNESCAPED_UNICODE);
            }
            if (!$cache->isReadOnly()) {
                $cache->write($cacheKey, $json);
            }
            $repo->freshMetadataUrls[$filename] = true;

            return $data;
        };

        $reject = function ($e) use ($filename, $accept, $io, $url, &$degradedMode, $repo, $lastModifiedTime) {
            if ($e instanceof TransportException && $e->getStatusCode() === 404) {
                $repo->packagesNotFoundCache[$filename] = true;

                return false;
            }

            if (!$degradedMode) {
                $io->writeError('<warning>'.$url.' could not be fully loaded ('.$e->getMessage().'), package information was loaded from the local cache and may be out of date</warning>');
            }
            $degradedMode = true;

            // if the file is in the cache, we fake a 304 Not Modified to allow the process to continue
            if ($lastModifiedTime) {
                return $accept(new Response(array('url' => $url), 304, array(), ''));
            }

            // special error code returned when network is being artificially disabled
            if ($e instanceof TransportException && $e->getStatusCode() === 499) {
                return $accept(new Response(array('url' => $url), 404, array(), ''));
            }

            throw $e;
        };

        return $httpDownloader->add($filename, $options)->then($accept, $reject);
    }

    /**
     * This initializes the packages key of a partial packages.json that contain some packages inlined + a providers-lazy-url
     *
     * This should only be called once
     *
     * @return void
     */
    private function initializePartialPackages()
    {
        $rootData = $this->loadRootServerFile();

        $this->partialPackagesByName = array();
        foreach ($rootData['packages'] as $package => $versions) {
            foreach ($versions as $version) {
                $this->partialPackagesByName[strtolower($version['name'])][] = $version;
            }
        }

        // wipe rootData as it is fully consumed at this point and this saves some memory
        $this->rootData = true;
    }

    /**
     * Checks if the package name is present in this lazy providers repo
     *
     * @param  string $name
     * @return bool   true if the package name is present in availablePackages or matched by availablePackagePatterns
     */
    protected function lazyProvidersRepoContains($name)
    {
        if (!$this->hasAvailablePackageList) {
            throw new \LogicException('lazyProvidersRepoContains should not be called unless hasAvailablePackageList is true');
        }

        if (is_array($this->availablePackages) && isset($this->availablePackages[$name])) {
            return true;
        }

        if (is_array($this->availablePackagePatterns)) {
            foreach ($this->availablePackagePatterns as $providerRegex) {
                if (Preg::isMatch($providerRegex, $name)) {
                    return true;
                }
            }
        }

        return false;
    }
}

Filemanager

Name Type Size Permission Actions
Vcs Folder 0755
ArrayRepository.php File 10.49 KB 0644
ArtifactRepository.php File 4.34 KB 0644
ComposerRepository.php File 62.55 KB 0644
CompositeRepository.php File 5.35 KB 0644
ConfigurableRepositoryInterface.php File 517 B 0644
FilesystemRepository.php File 12.28 KB 0644
FilterRepository.php File 5.32 KB 0644
InstalledArrayRepository.php File 963 B 0644
InstalledFilesystemRepository.php File 718 B 0644
InstalledRepository.php File 12.71 KB 0644
InstalledRepositoryInterface.php File 868 B 0644
InvalidRepositoryException.php File 479 B 0644
LockArrayRepository.php File 621 B 0644
PackageRepository.php File 1.78 KB 0644
PathRepository.php File 8.13 KB 0644
PearRepository.php File 818 B 0644
PlatformRepository.php File 31.44 KB 0644
RepositoryFactory.php File 7.39 KB 0644
RepositoryInterface.php File 4.7 KB 0644
RepositoryManager.php File 6.17 KB 0644
RepositorySecurityException.php File 482 B 0644
RepositorySet.php File 12.74 KB 0644
RootPackageRepository.php File 778 B 0644
VcsRepository.php File 20.38 KB 0644
VersionCacheInterface.php File 662 B 0644
WritableArrayRepository.php File 2.25 KB 0644
WritableRepositoryInterface.php File 1.77 KB 0644