WIP : add elo_chart

lib/src/model/user/user.dart

@@ -358,3 +358,25 @@ class UserPerfGame with _$UserPerfGame {
         )
       : null;
 }
+
+@immutable
+class UserRatingHistoryPerf {
+  final String perf;
+  final IList<UserRatingHistoryPoint> points;
+
+  const UserRatingHistoryPerf({
+    required this.perf,
+    required this.points,
+  });
+}
+
+@immutable
+class UserRatingHistoryPoint {
+  final DateTime date;
+  final int elo;
+
+  const UserRatingHistoryPoint({
+    required this.date,
+    required this.elo,
+  });
+}

lib/src/model/user/user_repository.dart

@@ -74,6 +74,37 @@ class UserRepository {
       mapper: _autocompleteFromJson,
     );
   }
+
+  Future<IList<UserRatingHistoryPerf>> getRatingHistory(UserId id) {
+    return client.readJsonList(
+      Uri.parse('$kLichessHost/api/user/$id/rating-history'),
+      mapper: _ratingHistoryFromJson,
+    );
+  }
+}
+
+UserRatingHistoryPerf _ratingHistoryFromJson(
+  Map<String, dynamic> json,
+) =>
+    _ratingHistoryFromPick(pick(json).required());
+
+UserRatingHistoryPerf _ratingHistoryFromPick(
+  RequiredPick perf,
+) {
+  return UserRatingHistoryPerf(
+    perf: perf('name').asStringOrThrow(),
+    points: perf('points').asListOrThrow((point) {
+      final values = point.asListOrThrow((point) => point.asIntOrThrow());
+      return UserRatingHistoryPoint(
+        date: DateTime(
+          values[0],
+          values[1],
+          values[2],
+        ),
+        elo: values[3],
+      );
+    }).toIList(),
+  );
 }
 
 // --

lib/src/model/user/user_repository_providers.dart

@@ -103,3 +103,13 @@ Future<IList<LightUser>> autoCompleteUser(
     (client) => UserRepository(client).autocompleteUser(term),
   );
 }
+
+@riverpod
+Future<IList<UserRatingHistoryPerf>> userRatingHistory(
+  UserRatingHistoryRef ref, {
+  required UserId id,
+}) async {
+  return ref.withClient(
+    (client) => UserRepository(client).getRatingHistory(id),
+  );
+}