v1.27 membership improvement

lib/model/membership.dart

@@ -1,36 +1,51 @@
+enum DurationType { free, subscription, lifetime, limited }
+
+extension DurationTypeExt on DurationType {
+  String enumToString() => toString().split(".").last;
+  DurationType getType(String type) => DurationType.values.firstWhere((e) => e.enumToString() == type);
+}
+
+enum DurationUnit { day, week, month, year }
+
+extension DurationUnitExt on DurationUnit {
+  String enumToString() => toString().split(".").last;
+  DurationUnit getType(String type) => DurationUnit.values.firstWhere((e) => e.enumToString() == type);
+}
+
 class Membership {
   late int membershipId;
   late String name;
   String? description;
   late int duration;
-  late String durationType;
-  late String durationUnit;
+  late DurationType durationType;
+  late DurationUnit durationUnit;
   int? trainingPlanId;
   String? trainingPlanDayIds;
 
+  Membership();
 
   Membership.fromJson(Map json) {
     membershipId = json['membershipId'];
     name = json['name'];
     description = json['description'] ?? "";
     duration = json['duration'];
-    durationUnit = json['durationUnit'];
-    durationType = json['durationType'];
+    durationType = DurationType.free.getType(json['durationType']);
+    durationUnit = DurationUnit.day.getType(json['durationUnit']);
     trainingPlanId = json['trainingPlanId'] ?? 0;
     trainingPlanDayIds = json['trainingPlanDayIds'] ?? "";
   }
 
-Map<String, dynamic> toJson() =>  {
-      "membershipId": membershipId,
-      "name": name,
-      "description": description,
-      "duration": duration,
-      "durationUnit": durationUnit,
-      "durationType": durationType,
-      "trainingPlanId": trainingPlanId,
-      "trainingPlanDayIds": trainingPlanDayIds,
-    };
+  Map<String, dynamic> toJson() => {
+        "membershipId": membershipId,
+        "name": name,
+        "description": description,
+        "duration": duration,
+        'durationType': durationType.enumToString(),
+        'durationUnit': durationUnit.enumToString(),
+        "trainingPlanId": trainingPlanId,
+        "trainingPlanDayIds": trainingPlanDayIds,
+      };
 
   @override
-  String toString() => toJson().toString();  
-}
+  String toString() => toJson().toString();
+}