Added basic logging + increment version

Logging is mainly just for the BG task and errors right now.

lib/providers/apps_provider.dart

@@ -12,8 +12,8 @@ import 'package:fluttertoast/fluttertoast.dart';
 import 'package:install_plugin_v2/install_plugin_v2.dart';
 import 'package:installed_apps/app_info.dart';
 import 'package:installed_apps/installed_apps.dart';
-import 'package:obtainium/app_sources/github.dart';
 import 'package:obtainium/custom_errors.dart';
+import 'package:obtainium/providers/logs_provider.dart';
 import 'package:obtainium/providers/notifications_provider.dart';
 import 'package:obtainium/providers/settings_provider.dart';
 import 'package:package_archive_info/package_archive_info.dart';
@@ -43,6 +43,7 @@ class AppsProvider with ChangeNotifier {
   bool loadingApps = false;
   bool gettingUpdates = false;
   bool forBGTask = false;
+  LogsProvider logs = LogsProvider();
 
   // Variables to keep track of the app foreground status (installs can't run in the background)
   bool isForeground = true;

lib/providers/logs_provider.dart

@@ -0,0 +1,109 @@
+import 'package:flutter/foundation.dart';
+import 'package:sqflite/sqflite.dart';
+
+const String logTable = 'logs';
+const String idColumn = '_id';
+const String levelColumn = 'level';
+const String messageColumn = 'message';
+const String timestampColumn = 'timestamp';
+const String dbPath = 'logs.db';
+
+enum LogLevels { debug, info, warning, error }
+
+class Log {
+  int? id;
+  late LogLevels level;
+  late String message;
+  DateTime timestamp = DateTime.now();
+
+  Map<String, Object?> toMap() {
+    var map = <String, Object?>{
+      idColumn: id,
+      levelColumn: level.index,
+      messageColumn: message,
+      timestampColumn: timestamp.millisecondsSinceEpoch
+    };
+    return map;
+  }
+
+  Log(this.message, this.level);
+
+  Log.fromMap(Map<String, Object?> map) {
+    id = map[idColumn] as int;
+    level = LogLevels.values.elementAt(map[levelColumn] as int);
+    message = map[messageColumn] as String;
+    timestamp =
+        DateTime.fromMillisecondsSinceEpoch(map[timestampColumn] as int);
+  }
+
+  @override
+  String toString() {
+    return '${timestamp.toString()}: ${level.name}: $message';
+  }
+}
+
+class LogsProvider {
+  LogsProvider({bool runDefaultClear = true}) {
+    clear(before: DateTime.now().subtract(const Duration(days: 7)));
+  }
+
+  Database? db;
+
+  Future<Database> getDB() async {
+    db ??= await openDatabase(dbPath, version: 1,
+        onCreate: (Database db, int version) async {
+      await db.execute('''
+create table if not exists $logTable ( 
+  $idColumn integer primary key autoincrement, 
+  $levelColumn integer not null,
+  $messageColumn text not null,
+  $timestampColumn integer not null)
+''');
+    });
+    return db!;
+  }
+
+  Future<Log> add(String message, {LogLevels level = LogLevels.info}) async {
+    Log l = Log(message, level);
+    l.id = await (await getDB()).insert(logTable, l.toMap());
+    if (kDebugMode) {
+      print(l);
+    }
+    return l;
+  }
+
+  Future<List<Log>> get({DateTime? before, DateTime? after}) async {
+    var where = getWhereDates(before: before, after: after);
+    return (await (await getDB())
+            .query(logTable, where: where.key, whereArgs: where.value))
+        .map((e) => Log.fromMap(e))
+        .toList();
+  }
+
+  Future<int> clear({DateTime? before, DateTime? after}) async {
+    var where = getWhereDates(before: before, after: after);
+    var res = await (await getDB())
+        .delete(logTable, where: where.key, whereArgs: where.value);
+    if (res > 0) {
+      add('Cleared $res logs (before = $before, after = $after)');
+    }
+    return res;
+  }
+}
+
+MapEntry<String?, List<int>?> getWhereDates(
+    {DateTime? before, DateTime? after}) {
+  List<String> where = [];
+  List<int> whereArgs = [];
+  if (before != null) {
+    where.add('$timestampColumn < ?');
+    whereArgs.add(before.millisecondsSinceEpoch);
+  }
+  if (after != null) {
+    where.add('$timestampColumn > ?');
+    whereArgs.add(after.millisecondsSinceEpoch);
+  }
+  return whereArgs.isEmpty
+      ? const MapEntry(null, null)
+      : MapEntry(where.join(' and '), whereArgs);
+}