cache sharing for posts. Begin infill implementation.

src/server/api/routers/infill.ts

@@ -0,0 +1,33 @@
+import { publicProcedure, createTRPCRouter } from "~/server/api/utils";
+import { env } from "~/env/server";
+
+// Helper to detect mobile devices from User-Agent
+const isMobileDevice = (userAgent: string | undefined): boolean => {
+  if (!userAgent) return false;
+  return /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(
+    userAgent
+  );
+};
+
+export const infillRouter = createTRPCRouter({
+  getConfig: publicProcedure.query(({ ctx }) => {
+    // Only admins get the config
+    if (ctx.privilegeLevel !== "admin") {
+      return { endpoint: null, token: null };
+    }
+
+    // Get User-Agent from request headers
+    const userAgent = ctx.event.nativeEvent.node.req.headers["user-agent"];
+
+    // Block mobile devices - infill is desktop only
+    if (isMobileDevice(userAgent)) {
+      return { endpoint: null, token: null };
+    }
+
+    // Return endpoint and token (or null if not configured)
+    return {
+      endpoint: env.VITE_INFILL_ENDPOINT || null,
+      token: env.INFILL_BEARER_TOKEN || null
+    };
+  })
+});