✨ Breadcrumbs with navigation

src/utils/linking.ts

@@ -22,6 +22,8 @@ const paths: Set<NavLink> = new Set([
   "/uses",
 ])
 
+const projectPaths: Set<string> = new Set<string>(["homepage", "sb1budget"])
+
 /**
  * Defines the localized pathnames for the site.
  * The key must be used to navigate to the correct path.
@@ -63,3 +65,22 @@ export function resolvePathname(pathname: string): AbsolutePathname {
   }
   return pathname as AbsolutePathname
 }
+
+export function isAbsolutePathname(path: string): path is AbsolutePathname {
+  return path.startsWith("/")
+}
+
+export function isNavLink(path: string): path is NavLink {
+  if (path.startsWith("/en")) {
+    path = path.slice(2)
+  }
+  if (paths.has(path as NavLink)) {
+    return true
+  }
+  const pathSplit = path.split("/").slice(1)
+  return (
+    pathSplit.length === 2 &&
+    pathSplit[0] === "projects" &&
+    projectPaths.has(pathSplit[1])
+  )
+}