first entity

lib/database/base_entity.dart

@@ -0,0 +1,19 @@
+abstract class BaseEntity{
+  static String id = 'id';
+  static String title = 'Title';
+  static String creationDate = 'CreationDate';
+  static String lastEditDate = 'LastEditDate';
+  
+  static String get getId{
+    return id;
+  }
+  static String get getTitle{
+    return title;
+  }
+  static String get getCreationDate{
+    return creationDate;
+  }
+  static String get getLastEditDate{
+    return lastEditDate;
+  }
+}

lib/database/identifiers/enum/color.dart

@@ -0,0 +1,14 @@
+enum Color {
+  none,
+  red,
+  orange,
+  yellow,
+  green,
+  blue,
+  purple,
+  pink,
+  brown,
+  grey,
+  black,
+  white,
+}

lib/database/identifiers/enum/priority.dart

@@ -0,0 +1,7 @@
+enum Priority{
+  none,
+  low,
+  medium,
+  moderate,
+  high
+}

lib/database/identifiers/tag.dart

@@ -0,0 +1,6 @@
+import 'enum/color.dart';
+
+class Tag {
+  static String title = "";
+  Color color = Color.none;
+}

lib/database/note.dart

@@ -0,0 +1,8 @@
+import 'base_entity.dart';
+
+class Note extends BaseEntity{
+  static String id = BaseEntity.getId;
+  static String Title = BaseEntity.getTitle;
+  static String CreationDate = BaseEntity.getCreationDate;
+
+}

lib/database/promemoria.dart

@@ -0,0 +1,11 @@
+import 'base_entity.dart';
+import 'identifiers/enum/priority.dart';
+
+class Note extends BaseEntity{
+  static String id = BaseEntity.getId;
+  static String title = BaseEntity.getTitle;
+  static String creationDate = BaseEntity.getCreationDate;
+  static String expirationDate = 'expirationDate';
+  Priority priority = Priority.low;
+}
+