From 71722ee7c2f833f6244410f6ddad688a2b5c20c3 Mon Sep 17 00:00:00 2001
From: raven <citrons@mondecitronne.com>
Date: Wed, 22 Oct 2025 19:37:40 -0500
Subject: validation as a subpackage of proto

---
 proto/validate/validate.go | 49 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 proto/validate/validate.go

(limited to 'proto')

diff --git a/proto/validate/validate.go b/proto/validate/validate.go
new file mode 100644
index 0000000..7251895
--- /dev/null
+++ b/proto/validate/validate.go
@@ -0,0 +1,49 @@
+package validate
+
+import (
+	"strings"
+	"unicode"
+)
+
+func Name(name string) bool {
+	if len(Fold(name)) == 0 || len(name) > 64 {
+		return false
+	}
+	for _, r := range name {
+		if unicode.IsControl(r) {
+			return false
+		}
+	}
+	return true
+}
+
+func Fold(s string) string {
+	var sb strings.Builder
+	var wasSpace bool
+	for _, r := range s {
+		for {
+			f := unicode.SimpleFold(r)
+			if f <= r {
+				r = f
+				break
+			}
+			r = f
+		}
+		r = unicode.ToLower(r)
+
+		if !unicode.IsPrint(r) {
+			continue
+		}
+
+		if r == ' ' {
+			if wasSpace {
+				continue
+			}
+			wasSpace = true
+		} else {
+			wasSpace = false
+		}
+		sb.WriteRune(r)
+	}
+	return strings.TrimSpace(sb.String())
+}
-- 
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