chore(wip): upgrade dependencies, begin refactor

frontend/lib/old/utils/get_first_page.dart

@@ -0,0 +1,50 @@
+import 'package:anyway/main.dart';
+import 'package:anyway/pages/no_trips_page.dart';
+import 'package:anyway/structs/agreement.dart';
+import 'package:flutter/material.dart';
+
+import 'package:anyway/structs/trip.dart';
+import 'package:anyway/pages/current_trip.dart';
+import 'package:anyway/pages/onboarding.dart';
+
+
+Widget getFirstPage() {
+  // check if the user has already seen the onboarding and agreed to the terms of service
+  return FutureBuilder(
+    future: getAgreement(),
+    builder: (context, snapshot) {
+      if (snapshot.connectionState == ConnectionState.done) {
+        if (snapshot.hasData) {
+          Agreement agrement = snapshot.data!;
+          if (agrement.agreed) {
+            return FutureBuilder(
+              future: savedTrips.loadTrips(),
+              builder: (context, snapshot) {
+                if (snapshot.connectionState == ConnectionState.done) {
+                  if (snapshot.hasData) {
+                    List<Trip> trips = snapshot.data!;
+                    if (trips.isNotEmpty) {
+                      return TripPage(trip: trips[0]);
+                    } else {
+                      return const NoTripsPage();
+                    }
+                  } else {
+                    return const Center(child: CircularProgressIndicator());
+                  }
+                } else {
+                  return const Center(child: CircularProgressIndicator());
+                }
+              },
+            );
+          } else {
+            return const OnboardingPage();
+          }
+        } else {
+          return const OnboardingPage();
+        }
+      } else {
+        return const OnboardingPage();
+      }
+    },
+  );
+}