var (
	// TypeBitbucket is a pkg:bitbucket purl.
	TypeBitbucket = "bitbucket"
	// TypeCocoapods is a pkg:cocoapods purl.
	TypeCocoapods = "cocoapods"
	// TypeCargo is a pkg:cargo purl.
	TypeCargo = "cargo"
	// TypeComposer is a pkg:composer purl.
	TypeComposer = "composer"
	// TypeConan is a pkg:conan purl.
	TypeConan = "conan"
	// TypeConda is a pkg:conda purl.
	TypeConda = "conda"
	// TypeCran is a pkg:cran purl.
	TypeCran = "cran"
	// TypeDebian is a pkg:deb purl.
	TypeDebian = "deb"
	// TypeDocker is a pkg:docker purl.
	TypeDocker = "docker"
	// TypeGem is a pkg:gem purl.
	TypeGem = "gem"
	// TypeGeneric is a pkg:generic purl.
	TypeGeneric = "generic"
	// TypeGithub is a pkg:github purl.
	TypeGithub = "github"
	// TypeGolang is a pkg:golang purl.
	TypeGolang = "golang"
	// TypeHackage is a pkg:hackage purl.
	TypeHackage = "hackage"
	// TypeHex is a pkg:hex purl.
	TypeHex = "hex"
	// TypeMaven is a pkg:maven purl.
	TypeMaven = "maven"
	// TypeNPM is a pkg:npm purl.
	TypeNPM = "npm"
	// TypeNuget is a pkg:nuget purl.
	TypeNuget = "nuget"
	// TypeOCI is a pkg:oci purl
	TypeOCI = "oci"
	// TypePyPi is a pkg:pypi purl.
	TypePyPi = "pypi"
	// TypeRPM is a pkg:rpm purl.
	TypeRPM = "rpm"
	// TypeSwift is pkg:swift purl
	TypeSwift = "swift"
	// TypeHuggingface is pkg:huggingface purl.
	TypeHuggingface = "huggingface"
	// TypeMLflow is pkg:mlflow purl.
	TypeMLFlow = "mlflow"
)

var (
	// QualifierKeyPattern describes a valid qualifier key:
	//
	// - The key must be composed only of ASCII letters and numbers, '.',
	//   '-' and '_' (period, dash and underscore).
	// - A key cannot start with a number.
	QualifierKeyPattern = regexp.MustCompile(`^[A-Za-z\.\-_][0-9A-Za-z\.\-_]*$`)
)

type PackageURL struct {
	Type       string
	Namespace  string
	Name       string
	Version    string
	Qualifiers Qualifiers
	Subpath    string
}

type Qualifier struct {
	Key   string
	Value string
}

type Qualifiers []Qualifier