Initial commit

lib/resolve-route.ts

@@ -0,0 +1,64 @@
+import schema from "@/app.schema.json";
+
+export type ResolvedRoute = {
+  key: string;
+  path: string;
+  params: Record<string, string>;
+};
+
+const ROUTE_KEYS = Object.keys(schema as Record<string, unknown>);
+
+/**
+ * Matches a concrete path's segments against a single express-style pattern
+ * (e.g. `/products/:handle`). Returns the captured params, or null on mismatch.
+ */
+const matchPattern = (
+  pattern: string,
+  segments: string[],
+): Record<string, string> | null => {
+  const patternSegments = pattern === "/" ? [] : pattern.slice(1).split("/");
+  if (patternSegments.length !== segments.length) return null;
+
+  const params: Record<string, string> = {};
+  for (let i = 0; i < patternSegments.length; i++) {
+    const part = patternSegments[i];
+    if (part.startsWith(":")) {
+      params[part.slice(1)] = segments[i];
+    } else if (part !== segments[i]) {
+      return null;
+    }
+  }
+  return params;
+};
+
+/**
+ * Resolves catch-all slug segments to a route key defined in the schema,
+ * supporting any express-style pattern (`/products/:handle`, `/blog/:slug`,
+ * etc.). Static segments are preferred over dynamic ones when both match.
+ */
+const resolveRoute = (segments: string[] = []): ResolvedRoute => {
+  // Editor routes live under `/editor/*`; the `editor` prefix is not part of
+  // the schema route keys, so strip it before matching.
+  const routeSegments =
+    segments[0] === "editor" ? segments.slice(1) : segments;
+  const path =
+    routeSegments.length === 0 ? "/" : `/${routeSegments.join("/")}`;
+
+  let best: ResolvedRoute | null = null;
+  let bestDynamicCount = Infinity;
+
+  for (const key of ROUTE_KEYS) {
+    const params = matchPattern(key, routeSegments);
+    if (!params) continue;
+
+    const dynamicCount = Object.keys(params).length;
+    if (dynamicCount < bestDynamicCount) {
+      best = { key, path, params };
+      bestDynamicCount = dynamicCount;
+    }
+  }
+
+  return best ?? { key: path, path, params: {} };
+};
+
+export default resolveRoute;