Play versus computer

lib/src/model/challenge/challenge.dart

@@ -22,6 +22,8 @@ abstract mixin class BaseChallenge {
   bool get rated;
   SideChoice get sideChoice;
   String? get initialFen;
+  int? get aiLevel;
+
 
   TimeIncrement? get timeIncrement =>
       clock != null ? TimeIncrement(clock!.time.inSeconds, clock!.increment.inSeconds) : null;
@@ -53,6 +55,7 @@ class Challenge with _$Challenge, BaseChallenge implements BaseChallenge {
     ChallengeUser? destUser,
     ChallengeDeclineReason? declineReason,
     String? initialFen,
+    int? aiLevel,
     ChallengeDirection? direction,
   }) = _Challenge;
 
@@ -123,6 +126,7 @@ class ChallengeRequest with _$ChallengeRequest, BaseChallenge implements BaseCha
     required bool rated,
     required SideChoice sideChoice,
     String? initialFen,
+    int? aiLevel,
   }) = _ChallengeRequest;
 
   @override
@@ -142,6 +146,7 @@ class ChallengeRequest with _$ChallengeRequest, BaseChallenge implements BaseCha
       'variant': variant.name,
       if (variant == Variant.fromPosition) 'fen': initialFen,
       if (sideChoice != SideChoice.random) 'color': sideChoice.name,
+      if (destUser.id == const UserId('ai')) 'level': aiLevel.toString(),
     };
   }
 }

lib/src/model/challenge/challenge_preferences.dart

@@ -52,6 +52,10 @@ class ChallengePreferences extends _$ChallengePreferences
   Future<void> setRated(bool rated) {
     return save(state.copyWith(rated: rated));
   }
+
+  Future<void> setLevel(int aiLevel) {
+    return save(state.copyWith(aiLevel: aiLevel));
+  }
 }
 
 @Freezed(fromJson: true, toJson: true)
@@ -65,6 +69,7 @@ class ChallengePrefs with _$ChallengePrefs implements Serializable {
     required int days,
     required bool rated,
     required SideChoice sideChoice,
+    required int aiLevel,
   }) = _ChallengePrefs;
 
   static const defaults = ChallengePrefs(
@@ -74,6 +79,7 @@ class ChallengePrefs with _$ChallengePrefs implements Serializable {
     days: 3,
     rated: false,
     sideChoice: SideChoice.random,
+    aiLevel: 1,
   );
 
   Speed get speed =>
@@ -90,6 +96,7 @@ class ChallengePrefs with _$ChallengePrefs implements Serializable {
       days: timeControl == ChallengeTimeControlType.correspondence ? days : null,
       rated: rated,
       sideChoice: sideChoice,
+      aiLevel: aiLevel,
       initialFen: initialFen,
     );
   }

lib/src/model/challenge/challenge_repository.dart

@@ -43,7 +43,8 @@ class ChallengeRepository {
   }
 
   Future<Challenge> create(ChallengeRequest challenge) async {
-    final uri = Uri(path: '/api/challenge/${challenge.destUser.id}');
+    final userId = challenge.destUser.id;
+    final uri = Uri(path: '/api/challenge/$userId');
     return client.postReadJson(
       uri,
       body: challenge.toRequestBody,