update shared utils

shared/slugify.ts

@@ -0,0 +1,29 @@
+// Name → handle / slug helpers shared by frontend + proxy.
+
+// URL-safe family slug (hyphenated, lowercase): "The Smiths" → "the-smiths".
+export function slugify(name: string): string {
+	return name
+		.toLowerCase()
+		.trim()
+		.replace(/[^a-z0-9]+/g, '-')
+		.replace(/^-+|-+$/g, '');
+}
+
+// Whitespace-free lowercase handle used for a member's URL segment and as the
+// per-family username suffix: "Jakey Boy" → "jakeyboy", "Joe Edhook" → "joeedhook".
+export function handle(name: string): string {
+	return name.toLowerCase().replace(/[^a-z0-9]/g, '');
+}
+
+// A member's PB username is namespaced by the family slug so it stays globally
+// unique (PB requires auth-identity usernames to be unique) even though the URL
+// segment is only unique within a family: "miss-fits:jakeyboy".
+export function famUsername(famSlug: string, handleName: string): string {
+	return `${slugify(famSlug)}:${handleName}`;
+}
+
+// Reverse of famUsername — the URL segment is the part after the last ":".
+export function handleOf(fullUsername: string): string {
+	const i = fullUsername.lastIndexOf(':');
+	return i >= 0 ? fullUsername.slice(i + 1) : fullUsername;
+}