Refactors

lib/models/date_range.dart

@@ -0,0 +1,32 @@
+import 'package:intl/intl.dart';
+
+class DateRange {
+  DateRange({required this.start, required this.end});
+  final DateTime? start;
+  final DateTime? end;
+
+  @override
+  String toString() {
+    final DateFormat dateFormat = DateFormat("MMM yyyy");
+    if (start == null && end == null) {
+      return '';
+    }
+    if (start == null && end != null) {
+      return dateFormat.format(end!);
+    }
+    if (start != null && end == null) {
+      return "${dateFormat.format(start!)} - Current";
+    }
+    return "${dateFormat.format(start!)} - ${dateFormat.format(end!)}";
+  }
+
+  @override
+  int get hashCode {
+    return Object.hashAll([start, end]);
+  }
+
+  @override
+  bool operator ==(Object other) {
+    return super.hashCode == other.hashCode;
+  }
+}