Fix all server-client issues

src/client/lib/src/services/api.dart

@@ -1,7 +1,6 @@
 import "package:flutter/foundation.dart" show debugPrint, kDebugMode;
 
 import "package:client/data.dart";
-import "package:http/http.dart" as http;
 import "package:shared/graph.dart";
 
 import "api_client.dart";

src/client/lib/src/view_models/home.dart

@@ -5,6 +5,7 @@ import "package:client/services.dart";
 import "package:flutter/widgets.dart" hide Path;
 
 import "package:google_maps_flutter/google_maps_flutter.dart";
+import "package:shared/graph.dart";
 
 import "home_markers.dart";
 import "view_model.dart";
@@ -66,17 +67,76 @@ class HomeModel extends ViewModel with HomeMarkers {
   }
 
   String? pathText;
+  List<Coordinates> pathWaypoint = [];
+  List<List<Coordinates>> pathWalking = [];
+  List<List<Coordinates>> pathStops = [];
+
+  void explainPath(Iterable<StopState> path, void Function(String) printer) {
+    var index = 0;
+    for (final step in path) {
+      index++;
+      final stop = stops[step.stopID]!;
+      if (index == path.length) {
+        printer("$index. Get off at ${stop.name}");
+      } else {
+        printer("$index. ${explainStep(step)}");
+      }
+    }
+  }
+
+  String explainStep(StopState step) {
+    final route = routes[step.routeID]!;
+    final stop = stops[step.stopID]!;
+    return switch (step.method) {
+      SearchMethod.bus => "Go one stop to $stop",
+      SearchMethod.start => "Walk to $stop\n  and board the $route line",
+      SearchMethod.transfer => "Transfer to the $route line",
+      SearchMethod.walk => "Walk to $stop\n  and board the $route line"
+    };
+  }
+
   Future<void> search() async {
     final start = (lat: startLatitude, long: startLongitude);
     final end = (lat: endLatitude, long: endLongitude);
+    pathText = null;
     if (start.lat == null || start.long == null) return;
     if (end.lat == null || end.long == null) return;
     isSearching = true;
     isLoading = true;
-    final result = await services.api.getPath(start: start as Coordinates, end: end as Coordinates);
-    pathText = result ?? "An error occurred";
+    final path = await services.api.getPath(start: start as Coordinates, end: end as Coordinates);
     isLoading = false;
-    if (result == null) return;
+    if (path == null) {
+      errorText = "An error occcurred";
+      return;
+    }
+    pathWalking.clear();
+    pathWaypoint.clear();
+    pathStops.clear();
+    for (final (index, step) in path.enumerate) {
+      final stop = stops[step.stopID]!;
+      final position = stop.coordinates;
+      switch (step.method) {
+        case SearchMethod.start:
+          pathWalking.add([start, position]);
+          pathWaypoint.add(position);
+          pathStops.add([position]);
+        case SearchMethod.bus:
+          pathStops.last.add(position);
+        case SearchMethod.transfer:
+          pathWaypoint.add(position);
+          pathStops.add([]);
+        case SearchMethod.walk:
+          final prevStep = path[index - 1];
+          final prevStopID = prevStep.stopID;
+          final prevStop = stops[prevStopID]!;
+          pathWalking.add([prevStop.coordinates, position]);
+          pathWaypoint.add(stop.coordinates);
+          pathStops.add([position]);
+      }
+    }
+    final buffer = StringBuffer();
+    explainPath(path, buffer.writeln);
+    pathText = buffer.toString();
     isSearching = false;
     notifyListeners();
   }

src/client/lib/src/view_models/home_markers.dart

@@ -51,15 +51,8 @@ mixin HomeMarkers on ChangeNotifier {
     ("BC Transit", bcRouteNames),
   ];
 
-  int _parseBcNumber(String routeName) {
-    // eg, "53)" --> 53
-    final first = routeName.split(" ").first;
-    final withoutParen = first.substring(0, first.length - 1);
-    return int.parse(withoutParen);
-  }
-
   int compareBcRoutes(Route a, Route b) =>
-    _parseBcNumber(a.shortName).compareTo(_parseBcNumber(b.shortName));
+    int.parse(a.shortName).compareTo(int.parse(b.shortName));
 
   int compareOcctRoutes(Route a, Route b) =>
     a.shortName.compareTo(b.shortName);

src/shared/lib/src/graph/algorithm.dart

@@ -45,16 +45,3 @@ Iterable<StopState>? findPath(Coordinates start, Coordinates end) {
 
 double getTotalDistance(Iterable<StopState> path) =>
   path.sum((step) => step.distanceWalked);
-
-void explainPath(Iterable<StopState> path, void Function(String) printer) {
-  var index = 0;
-  for (final step in path) {
-    index++;
-    final stop = StopState.stops[step.stopID]!;
-    if (index == path.length) {
-      printer("$index. Get off at ${stop.name}");
-    } else {
-      printer("$index. ${step.explanation}");
-    }
-  }
-}

src/shared/lib/src/graph/state.dart

@@ -157,17 +157,6 @@ class StopState extends AStarState<StopState> with Encodable {
     return result;
   }
 
-  String get explanation {
-    final route = routes[routeID]!;
-    final stop = stops[stopID]!;
-    return switch (method) {
-      SearchMethod.bus => "Go one stop to $stop",
-      SearchMethod.start => "Walk to $stop\n  and board the $route line",
-      SearchMethod.transfer => "Transfer to the $route line",
-      SearchMethod.walk => "Walk to $stop\n  and board the $route line"
-    };
-  }
-
   @override
   Json toJson() => {
     "stop_id": stopID,