Proper firebase admin service account access

.gitignore

@@ -42,3 +42,4 @@ app.*.map.json
 /android/app/debug
 /android/app/profile
 /android/app/release
+.secrets

lib/firebase/score.dart

@@ -2,19 +2,22 @@ import 'package:firedart/firestore/models.dart';
 
 class Score {
   final int playerId;
-  final String email;
+  final String username;
   final int score;
 
   Score({
     required this.playerId,
-    required this.email,
+    required this.username,
     required this.score,
   });
 
   Score.fromDocument(Document document)
       : this(
           playerId: document.map['playerId'] as int,
-          email: document.map['email'] as String,
+          username: document.map['username'] as String,
           score: document.map['score'] as int,
         );
+
+  @override
+  String toString() => '[$playerId] $username: $score';
 }

lib/firebase/score_calculator.dart

@@ -6,6 +6,9 @@ class _PlayerScore {
   int score = 0;
 
   _PlayerScore(this.player);
+
+  @override
+  String toString() => '$player: $score';
 }
 
 class ScoreCalculator {
@@ -15,13 +18,14 @@ class ScoreCalculator {
     final scores = points.entries
         .toList()
         .sortedBy<num>((entry) => entry.value)
-        .map((entry) => _PlayerScore(entry.key));
+        .map((entry) => _PlayerScore(entry.key))
+        .toList();
 
     final numPlayers = points.length;
     final totalScore = points.values.reduce((a, b) => a + b);
 
     var jackpot = numPlayers;
-    if (jackpot == 0) {
+    if (jackpot == 0 || totalScore == 0) {
       return {};
     }
 
@@ -39,9 +43,7 @@ class ScoreCalculator {
     }
 
     return Map.fromEntries(
-      scores
-          .map((score) => MapEntry(score.player, score.score))
-          .where((element) => element.value > 0),
+      scores.where((e) => e.score > 0).map((e) => MapEntry(e.player, e.score)),
     );
   }
 }

lib/firebase/scores.dart

@@ -1,34 +1,73 @@
+import 'dart:io';
+
+import 'package:firebase_admin/firebase_admin.dart';
 import 'package:firedart/firedart.dart';
+import 'package:firedart/firestore/token_authenticator.dart';
 import 'package:lightrunners/firebase/score.dart';
+import 'package:uuid/uuid.dart';
 
 class Scores {
-  static late Firestore firestore;
+  static const uuid = Uuid();
+  static Firestore? _firestore;
 
   Scores._();
 
+  static Future<String> _createCustomToken() => FirebaseAdmin.instance
+      .initializeApp(
+        AppOptions(
+          credential: FirebaseAdmin.instance
+              .certFromPath('.secrets/lightrunners-service-account.json'),
+        ),
+      )
+      .auth()
+      .createCustomToken(uuid.v4());
+
   static Future<void> init() async {
-    // NOTE: This will not work. support was removed from the library
     const projectId = 'lightrunners-e89a9';
-    Firestore.initialize(projectId);
-    firestore = Firestore.instance;
+    final apiKey = File('.secrets/api-key.conf').readAsStringSync();
+
+    final customToken = await _createCustomToken();
+
+    final tokenStore = VolatileStore();
+
+    final auth = FirebaseAuth(apiKey, tokenStore);
+    await auth.signInWithCustomToken(customToken);
+
+    final authenticator = TokenAuthenticator.from(auth)?.authenticate;
+    _firestore = Firestore(projectId, authenticator: authenticator);
   }
 
   static Future<List<Score>> topScores() async {
+    final firestore = _firestore;
+    if (firestore == null) {
+      print('Error: Firestore not initialized.');
+      return [];
+    }
+
     final page = await firestore
         .collection('scores')
         .orderBy('score', descending: true)
         .limit(10)
         .get();
-    return page.map(Score.fromDocument).toList();
+    final results = page.map(Score.fromDocument).toList();
+    print('Fetch top scores: $results');
+    return results;
   }
 
   static Future<void> updateScore({
     required int playerId,
     required int score,
   }) async {
+    final firestore = _firestore;
+    if (firestore == null) {
+      print('Error: Firestore not initialized.');
+      return;
+    }
+
     final document =
         firestore.collection('scores').document(playerId.toString());
     if (await document.exists) {
+      print('Updating score for player id $playerId to $score.');
       await document.update({'score': score});
     } else {
       print('Error: Score not found for player id $playerId.');

lib/game/components/count_down.dart

@@ -4,7 +4,7 @@ import 'package:flutter/painting.dart';
 import 'package:google_fonts/google_fonts.dart';
 import 'package:lightrunners/ui/ui.dart';
 
-const _matchLength = 60.0;
+const _matchLength = 20.0;
 const _radius = Radius.circular(3.0);
 
 class CountDown extends PositionComponent {

lib/leaderboard/view/leaderboard_page.dart

@@ -122,9 +122,12 @@ class _LeaderboardPageState extends State<LeaderboardPage> {
   }
 
   String _toScoreboardLine(Score record) {
-    final name = record.email.substring(
+    final name = record.username.substring(
       0,
-      min(record.email.length, _maxCharactersScoreBoard - _maxScoreDigits - 1),
+      min(
+        record.username.length,
+        _maxCharactersScoreBoard - _maxScoreDigits - 1,
+      ),
     );
     final maxScore = pow(10, _maxScoreDigits) - 1;
     final score = record.score