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package tuple
import (
"fmt"
"regexp"
"slices"
)
var (
onrRegex = regexp.MustCompile(fmt.Sprintf("^%s$", onrExpr))
subjectRegex = regexp.MustCompile(fmt.Sprintf("^%s$", subjectExpr))
)
var (
onrSubjectRelIndex = slices.Index(subjectRegex.SubexpNames(), "subjectRel")
onrSubjectTypeIndex = slices.Index(subjectRegex.SubexpNames(), "subjectType")
onrSubjectIDIndex = slices.Index(subjectRegex.SubexpNames(), "subjectID")
onrResourceTypeIndex = slices.Index(onrRegex.SubexpNames(), "resourceType")
onrResourceIDIndex = slices.Index(onrRegex.SubexpNames(), "resourceID")
onrResourceRelIndex = slices.Index(onrRegex.SubexpNames(), "resourceRel")
)
// ParseSubjectONR converts a string representation of a Subject ONR to an ObjectAndRelation. Unlike
// ParseONR, this method allows for objects without relations. If an object without a relation
// is given, the relation will be set to ellipsis.
func ParseSubjectONR(subjectOnr string) (ObjectAndRelation, error) {
groups := subjectRegex.FindStringSubmatch(subjectOnr)
if len(groups) == 0 {
return ObjectAndRelation{}, fmt.Errorf("invalid subject ONR: %s", subjectOnr)
}
relation := Ellipsis
if len(groups[onrSubjectRelIndex]) > 0 {
relation = groups[onrSubjectRelIndex]
}
return ObjectAndRelation{
ObjectType: groups[onrSubjectTypeIndex],
ObjectID: groups[onrSubjectIDIndex],
Relation: relation,
}, nil
}
// MustParseSubjectONR converts a string representation of a Subject ONR to an ObjectAndRelation.
// Panics on error.
func MustParseSubjectONR(subjectOnr string) ObjectAndRelation {
parsed, err := ParseSubjectONR(subjectOnr)
if err != nil {
panic(err)
}
return parsed
}
// ParseONR converts a string representation of an ONR to an ObjectAndRelation object.
func ParseONR(onr string) (ObjectAndRelation, error) {
groups := onrRegex.FindStringSubmatch(onr)
if len(groups) == 0 {
return ObjectAndRelation{}, fmt.Errorf("invalid ONR: %s", onr)
}
return ObjectAndRelation{
ObjectType: groups[onrResourceTypeIndex],
ObjectID: groups[onrResourceIDIndex],
Relation: groups[onrResourceRelIndex],
}, nil
}
// MustParseONR converts a string representation of an ONR to an ObjectAndRelation object. Panics on error.
func MustParseONR(onr string) ObjectAndRelation {
parsed, err := ParseONR(onr)
if err != nil {
panic(err)
}
return parsed
}
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