snapshot of https://github.com/cortezaproject/corteza.git (2024.9.x, 2026-09-18; blobs > 131072B omitted)

server/pkg/handle/handle.go

@@ -0,0 +1,40 @@
+package handle
+
+import (
+	"regexp"
+	"strings"
+)
+
+var (
+	validHandle  = regexp.MustCompile(`^[A-Za-z][0-9A-Za-z_\-.]*[A-Za-z0-9]$`)
+	invalidChars = regexp.MustCompile(`[^0-9A-Za-z_\-.]+`)
+)
+
+func IsValid(s string) bool {
+	return s == "" || (len(s) >= 2 && validHandle.MatchString(s))
+}
+
+// Cast transforms candidates to find a valid (non-empty) handle
+func Cast(check func(string) bool, candidates ...string) (handle string, ok bool) {
+	ok = true
+
+	for _, c := range candidates {
+		if c == "" {
+			continue
+		}
+
+		// Capitalize
+		handle = strings.ReplaceAll(c[:1]+strings.Title(c)[1:], " ", "")
+		handle = invalidChars.ReplaceAllString(handle, "")
+
+		if handle == "" {
+			continue
+		}
+
+		if IsValid(handle) && (check == nil || check(handle)) {
+			return
+		}
+	}
+
+	return "", false
+}