/*
 * Copyright 2022, Andrew Lindesay <apl@lindesay.co.nz>.
 * All rights reserved. Distributed under the terms of the MIT License.
 */

#include "PackageUtils.h"


using namespace BPackageKit;


/*static*/
status_t PackageUtils::DeriveLocalFilePath(const PackageInfo* package,
	BPath& path)
{
	if (package->IsLocalFile()) {
		path.SetTo(package->LocalFilePath());
		return B_OK;
	}

	path.Unset();
	BPackageInstallationLocation installationLocation
		= DeriveInstallLocation(package);
	directory_which which;
	status_t result = _DeriveDirectoryWhich(installationLocation, &which);

	if (result == B_OK)
		result = find_directory(which, &path);

	if (result == B_OK)
		path.Append(package->FileName());

	return result;
}


/*static*/ status_t
PackageUtils::_DeriveDirectoryWhich(
	BPackageInstallationLocation location,
	directory_which* which)
{
	switch (location) {
		case B_PACKAGE_INSTALLATION_LOCATION_SYSTEM:
			*which = B_SYSTEM_PACKAGES_DIRECTORY;
			break;
		case B_PACKAGE_INSTALLATION_LOCATION_HOME:
			*which = B_USER_PACKAGES_DIRECTORY;
			break;
		default:
			debugger("illegal state: unsupported package installation"
				"location");
			return B_BAD_VALUE;
	}
	return B_OK;
}


/*static*/ BPackageInstallationLocation
PackageUtils::DeriveInstallLocation(const PackageInfo* package)
{
	const PackageInstallationLocationSet& locations
		= package->InstallationLocations();

	// If the package is already installed, return its first installed location
	if (locations.size() != 0)
		return static_cast<BPackageInstallationLocation>(*locations.begin());

	return B_PACKAGE_INSTALLATION_LOCATION_SYSTEM;
}