feat(GRO-2157): navigation export endpoints (Phase 2.3) (#190)

src/routes/routes.ts

@@ -1,4 +1,4 @@
-import { Hono } from "hono";
+import { Hono, type Context } from "hono";
 import { zValidator } from "@hono/zod-validator";
 import { z } from "zod/v3";
 import {
@@ -24,6 +24,11 @@ import {
   type RouteStopInput,
   type StopConflictFlags,
 } from "../services/routeOptimization.js";
+import {
+  buildNavigationUrl,
+  type NavigationPlatform,
+  type NavigationStop,
+} from "../services/navigationExport.js";
 
 export const routesRouter = new Hono<AppEnv>();
 
@@ -460,3 +465,65 @@ routesRouter.patch(
     });
   }
 );
+
+/**
+ * GET /:routeId/export/:platform — build a native-navigation deep-link URL for an
+ * optimized route. Origin = first stop, destination = last stop, the rest carried
+ * as ordered intermediate waypoints. Waypoint count is validated against the
+ * platform's limit. Auth: manager (any route) or groomer (own route only).
+ */
+async function handleNavigationExport(
+  c: Context<AppEnv>,
+  platform: NavigationPlatform
+) {
+  const db = getDb();
+  const routeId = c.req.param("routeId");
+  if (!routeId || !z.string().uuid().safeParse(routeId).success) {
+    return c.json({ error: "routeId must be a UUID" }, 400);
+  }
+
+  const [route] = await db
+    .select()
+    .from(groomerRoutes)
+    .where(eq(groomerRoutes.id, routeId));
+  if (!route) {
+    return c.json({ error: "Route not found" }, 404);
+  }
+
+  // Reuse the groomer-own / manager authorization rule against the route owner.
+  const resolved = resolveTargetStaffId(c.get("staff"), route.staffId);
+  if ("error" in resolved) {
+    return c.json({ error: resolved.error }, resolved.status);
+  }
+
+  const stops = await loadRouteStops(db, routeId);
+  if (stops.length === 0) {
+    return c.json({ error: "route has no stops to export" }, 400);
+  }
+
+  const navStops: NavigationStop[] = stops.map((s) => ({
+    latitude: s.latitude,
+    longitude: s.longitude,
+    label: s.clientName,
+  }));
+
+  const result = buildNavigationUrl(platform, navStops);
+  if ("error" in result) {
+    return c.json({ error: result.error }, result.status);
+  }
+
+  return c.json({
+    platform: result.platform,
+    url: result.url,
+    stopCount: result.stopCount,
+    waypointCount: result.waypointCount,
+  });
+}
+
+routesRouter.get("/:routeId/export/google-maps", (c) =>
+  handleNavigationExport(c, "google-maps")
+);
+
+routesRouter.get("/:routeId/export/apple-maps", (c) =>
+  handleNavigationExport(c, "apple-maps")
+);