simple support for nip07

lib/data/app_db.dart

@@ -1 +1,41 @@
-class AppDB {}
+import 'package:nowser/data/db.dart';
+
+import 'package:sqflite/sqflite.dart';
+
+import 'app.dart';
+
+class AppDB {
+  static Future<List<App>> all() async {
+    List<App> objs = [];
+    var db = await DB.getCurrentDatabase();
+    List<Map<String, dynamic>> list = await db.rawQuery("select * from app");
+    for (var i = 0; i < list.length; i++) {
+      var json = list[i];
+      objs.add(App.fromJson(json));
+    }
+    return objs;
+  }
+
+  static Future<App?> get(int id, {DatabaseExecutor? db}) async {
+    db = await DB.getDB(db);
+    var list = await db.query("app", where: "id = ?", whereArgs: [id]);
+    if (list.isNotEmpty) {
+      return App.fromJson(list[0]);
+    }
+  }
+
+  static Future<int> insert(App o, {DatabaseExecutor? db}) async {
+    db = await DB.getDB(db);
+    return await db.insert("app", o.toJson());
+  }
+
+  static Future update(App o, {DatabaseExecutor? db}) async {
+    db = await DB.getDB(db);
+    await db.update("app", o.toJson(), where: "id = ?", whereArgs: [o.pubkey]);
+  }
+
+  static Future<void> delete(int id, {DatabaseExecutor? db}) async {
+    db = await DB.getDB(db);
+    db.execute("delete from app where id = ?");
+  }
+}