trait CanonicalPackagesTrait

trait CanonicalPackagesTrait {
    
    /**
     * Get unique packages (at most one package of each name), with aliases resolved and removed.
     *
     * @return PackageInterface[]
     */
    public function getCanonicalPackages() {
        $packages = $this->getPackages();
        // get at most one package of each name, preferring non-aliased ones
        $packagesByName = [];
        foreach ($packages as $package) {
            if (!isset($packagesByName[$package->getName()]) || $packagesByName[$package->getName()] instanceof AliasPackage) {
                $packagesByName[$package->getName()] = $package;
            }
        }
        $canonicalPackages = [];
        // unfold aliased packages
        foreach ($packagesByName as $package) {
            while ($package instanceof AliasPackage) {
                $package = $package->getAliasOf();
            }
            $canonicalPackages[] = $package;
        }
        return $canonicalPackages;
    }

}