Implemented RichObjectString in text messages

lib/api/marianumcloud/talk/chat/getChatResponse.dart

@@ -33,6 +33,7 @@ class GetChatResponseObject {
   bool isReplyable;
   String referenceId;
   String message;
+  @JsonKey(fromJson: _fromJson) Map<String, RichObjectString>? messageParameters;
 
   GetChatResponseObject(
       this.id,
@@ -45,9 +46,45 @@ class GetChatResponseObject {
       this.messageType,
       this.isReplyable,
       this.referenceId,
-      this.message);
+      this.message,
+      this.messageParameters);
 
   factory GetChatResponseObject.fromJson(Map<String, dynamic> json) => _$GetChatResponseObjectFromJson(json);
   Map<String, dynamic> toJson() => _$GetChatResponseObjectToJson(this);
+
 }
 
+Map<String, RichObjectString>? _fromJson(json) {
+  if(json is Map<String, dynamic>) {
+    Map<String, RichObjectString> data = {};
+    for (var element in json.keys) {
+      data.putIfAbsent(element, () => RichObjectString.fromJson(json[element]));
+    }
+    return data;
+  }
+
+  return null;
+}
+
+@JsonSerializable(explicitToJson: true)
+class RichObjectString {
+  RichObjectStringObjectType type;
+  String id;
+  String name;
+
+  String? path;
+  String? link;
+
+  RichObjectString(this.type, this.id, this.name, this.path, this.link);
+
+  factory RichObjectString.fromJson(Map<String, dynamic> json) => _$RichObjectStringFromJson(json);
+  Map<String, dynamic> toJson() => _$RichObjectStringToJson(this);
+}
+
+enum RichObjectStringObjectType {
+  @JsonValue("user") user,
+  @JsonValue("group") group,
+  @JsonValue("file") file,
+  @JsonValue("guest") guest,
+  @JsonValue("highlight") highlight,
+}