oc-search porting to flutter (missing compose + workflow editor)

lib/models/abstract.dart

@@ -0,0 +1,43 @@
+import 'dart:convert';
+import 'dart:developer' as developer;
+
+abstract class SerializerDeserializer<T> {
+  T deserialize(dynamic json);
+  Map<String, dynamic> serialize();
+}
+
+Map<String, List<T>> fromMapListJson<T extends SerializerDeserializer>(Map<String, dynamic> j, SerializerDeserializer ref) {
+    var map = <String, List<T>>{};
+    for (var key in j.keys) {  
+      if(j[key] != null) { map[key] = fromListJson(j[key], ref); }
+    }
+    return map;
+}
+
+Map<String, T> fromMapJson<T extends SerializerDeserializer>(Map<String, dynamic> j, SerializerDeserializer ref) {
+    var map = <String, T>{};
+    for (var key in j.keys) {  
+      if(j[key] != null) { map[key] = ref.deserialize(json.decode(json.encode(j[key]))); }
+    }
+    return map;
+}
+
+List<T> fromListJson<T extends SerializerDeserializer>(List<dynamic> jss, SerializerDeserializer ref) {
+    var list = <T>[];
+    for (var js in jss) {  list.add(ref.deserialize(json.decode(json.encode(js)))); } 
+    return list;
+}
+
+Map<String, Map<String, dynamic>> toMapJson<T extends SerializerDeserializer>(Map<String, T> json) {
+    var map = <String, Map<String, dynamic>>{};
+    for (var key in json.keys) { 
+      if(json[key] != null) { map[key] = json[key]!.serialize(); }
+    }
+    return map;
+}
+
+List<Map<String, dynamic>> toListJson<T extends SerializerDeserializer>(List<T> obj) {
+    var list = <Map<String, dynamic>>[];
+    for (var js in obj) { list.add(js.serialize()); }
+    return list;
+}