Add shared resource naming primitives

internal/domain/resource_identity.go

@@ -0,0 +1,40 @@
+package domain
+
+import "strings"
+
+func validResourceID(id string) bool {
+	if !strings.Contains(id, "/") {
+		return strings.TrimSpace(id) != ""
+	}
+	if strings.Count(id, "/") != 1 {
+		return false
+	}
+	namespace, localID, _ := strings.Cut(id, "/")
+	return namespace != "" && localID != ""
+}
+
+func validResourceNamespace(namespace string) bool {
+	return strings.TrimSpace(namespace) != "" && !strings.Contains(namespace, "/")
+}
+
+func validLocalResourceKey(key string) bool {
+	return strings.TrimSpace(key) != "" && !strings.Contains(key, "/")
+}
+
+func qualifyResourceID(id, namespace string) (string, bool) {
+	if !validResourceID(id) || (namespace != "" && !validResourceNamespace(namespace)) {
+		return "", false
+	}
+	if strings.Contains(id, "/") || namespace == "" {
+		return id, true
+	}
+	return namespace + "/" + id, true
+}
+
+func resourceNamespaceFromID(id string) (string, bool) {
+	if !validResourceID(id) || !strings.Contains(id, "/") {
+		return "", false
+	}
+	namespace, _, _ := strings.Cut(id, "/")
+	return namespace, true
+}