feat: Make it possible to construct ships by type

packages/cli/bin/ships_validate.dart

@@ -0,0 +1,58 @@
+import 'dart:convert';
+
+import 'package:cli/cache/caches.dart';
+import 'package:cli/cli.dart';
+import 'package:cli/third_party/compare.dart';
+
+bool _jsonCompare(Ship actual, Ship expected) {
+  final diff = findDifferenceBetweenStrings(
+    jsonEncode(actual.toJson()),
+    jsonEncode(expected.toJson()),
+  );
+  if (diff != null) {
+    logger.info('Ship differs from expected: ${diff.which}');
+    return false;
+  }
+  return true;
+}
+
+/// Log a warning if the purchased ship does not match the expected template.
+// void verifyShipMatchesTemplate(Ship ship, ShipType shipType) {
+//   final fromTemplate = makeShipForComparison(
+//     type: shipType,
+//     shipSymbol: ship.shipSymbol,
+//     factionSymbol: ship.registration.factionSymbol,
+//     origin: ship.nav.route.origin,
+//     now: ship.nav.route.arrival,
+//   );
+// }
+
+Future<void> command(FileSystem fs, ArgResults argResults) async {
+  final shipCache = ShipCache.loadCached(fs)!;
+  final ships = shipCache.ships;
+  for (final ship in ships) {
+    final frameSymbol = ship.frame.symbol;
+    final shipType = shipTypeFromFrame(frameSymbol);
+    if (shipType == null) {
+      logger.info('Unknown ship type for $frameSymbol');
+      continue;
+    }
+    final exampleShip = makeShipForComparison(
+      type: shipType,
+      shipSymbol: ship.shipSymbol,
+      factionSymbol: FactionSymbols.fromJson(ship.registration.factionSymbol)!,
+      nav: ship.nav,
+      fuel: ship.fuel,
+      cargo: ship.cargo,
+    );
+    if (exampleShip == null) {
+      logger.info('Failed to make example ship for $shipType');
+      continue;
+    }
+    _jsonCompare(ship, exampleShip);
+  }
+}
+
+void main(List<String> args) async {
+  await runOffline(args, command);
+}

packages/cli/lib/behavior/buy_ship.dart

@@ -84,6 +84,17 @@ ShipyardTrip? findBestShipyardToBuy(
   return best;
 }
 
+/// Log a warning if the purchased ship does not match the expected template.
+// void verifyShipMatchesTemplate(Ship ship, ShipType shipType) {
+//   final fromTemplate = makeShip(
+//     type: shipType,
+//     shipSymbol: ship.shipSymbol,
+//     factionSymbol: ship.registration.factionSymbol,
+//     origin: ship.nav.route.origin,
+//     now: ship.nav.route.arrival,
+//   );
+// }
+
 /// Apply the buy ship behavior.
 Future<DateTime?> advanceBuyShip(
   Api api,
@@ -129,6 +140,7 @@ Future<DateTime?> advanceBuyShip(
       shipyard.waypointSymbol,
       shipType,
     );
+    // verifyShipMatchesTemplate(ship, shipType);
   } on ApiException catch (e) {
     // ApiException 400: {"error":{"message":"Failed to purchase ship.
     // Agent has insufficient funds.","code":4216,

packages/cli/lib/cache/agent_cache.dart

@@ -15,7 +15,7 @@ bool _agentsMatch(Agent actual, Agent expected) {
     jsonEncode(expected.toJson()),
   );
   if (diff != null) {
-    logger.info('Agent differs from expected: $diff');
+    logger.info('Agent differs from expected: ${diff.which}');
     return false;
   }
   return true;