Jarves\Controller\Admin\BundleManager\ManagerController::getPackage PHP Method

    protected function getPackage(RepositoryInterface $installedRepo, RepositoryInterface $repos, $name, $version = null)
    {
        $name = strtolower($name);
        $constraint = null;
        if ($version) {
            $constraint = $this->versionParser->parseConstraints($version);
        }
        $policy = new DefaultPolicy();
        $pool = new Pool('dev');
        $pool->addRepository($repos);
        $matchedPackage = null;
        $versions = array();
        $matches = $pool->whatProvides($name, $constraint);
        foreach ($matches as $index => $package) {
            // skip providers/replacers
            if ($package->getName() !== $name) {
                unset($matches[$index]);
                continue;
            }
            // select an exact match if it is in the installed repo and no specific version was required
            if (null === $version && $installedRepo->hasPackage($package)) {
                $matchedPackage = $package;
            }
            $versions[$package->getPrettyVersion()] = $package->getVersion();
            $matches[$index] = $package->getId();
        }
        // select prefered package according to policy rules
        if (!$matchedPackage && $matches && ($prefered = $policy->selectPreferedPackages($pool, array(), $matches))) {
            $matchedPackage = $pool->literalToPackage($prefered[0]);
        }
        return array($matchedPackage, $versions);
    }