[stats] build payloads

lib/backend/stats/entity/feature.dart

@@ -1,7 +1,9 @@
 import 'package:objectbox/objectbox.dart';
 
+import 'stats.dart';
+
 @Entity()
-class StatsFeatureUsage {
+class StatsFeatureUsage implements StatsEntry {
   @Id()
   int id;
   final String feature;
@@ -15,4 +17,14 @@ class StatsFeatureUsage {
     this.result = "",
     required this.time,
   });
+
+  @override
+  Map<String, dynamic> toPayload() => {
+        "category": "app_feature",
+        "data": {
+          "feature": feature,
+          "time": time.toIso8601String(),
+          "result": result,
+        }
+      };
 }

lib/backend/stats/entity/route.dart

@@ -1,7 +1,9 @@
 import 'package:objectbox/objectbox.dart';
 
+import 'stats.dart';
+
 @Entity()
-class StatsRoute {
+class StatsRoute implements StatsEntry {
   @Id()
   int id;
   final String route;
@@ -13,4 +15,13 @@ class StatsRoute {
     required this.route,
     required this.time,
   });
+
+  @override
+  Map<String, dynamic> toPayload() => {
+        "category": "app_route",
+        "data": {
+          "route": route,
+          "time": time.toIso8601String(),
+        }
+      };
 }

lib/backend/stats/entity/stats.dart

@@ -0,0 +1,3 @@
+abstract class StatsEntry {
+  Map<String, dynamic> toPayload();
+}

lib/backend/stats/service/stats.dart

@@ -1 +1,16 @@
-class StatsService {}
+import 'package:dio/dio.dart';
+import 'package:mimir/init.dart';
+
+import '../entity/stats.dart';
+
+class StatsService {
+  Dio get _dio => Init.mimirDio;
+
+  Future<void> uploadStats(List<StatsEntry> list) async {
+    final payloads = list.map((entry) => entry.toPayload()).toList(growable: false);
+    final res = await _dio.post(
+      "https://stats.mysit.life/v1/log",
+      data: payloads,
+    );
+  }
+}