创建群组或者添加群组成员时，群组成员的Extra会放到通知消息的extra中，这样便于业务处理通知消息

common/src/main/java/cn/wildfirechat/pojos/GroupNotificationBinaryContent.java

@@ -13,6 +13,7 @@ import cn.wildfirechat.proto.WFCMessage;
 import com.google.gson.Gson;
 import com.google.gson.GsonBuilder;
 import com.google.protobuf.ByteString;
+import io.netty.util.internal.StringUtil;
 
 import java.util.List;
 
@@ -32,6 +33,8 @@ public class GroupNotificationBinaryContent {
     //value2(member or something)
     private String m;
 
+    private String extra;
+
     public GroupNotificationBinaryContent() {
     }
 
@@ -89,8 +92,18 @@ public class GroupNotificationBinaryContent {
         this.ms = ms;
     }
 
+    public GroupNotificationBinaryContent setExtra(String extra) {
+        this.extra = extra;
+        return this;
+    }
+
     public WFCMessage.MessageContent getGroupNotifyContent(int groupContentType) {
-        return WFCMessage.MessageContent.newBuilder().setType(groupContentType).setData(ByteString.copyFromUtf8(new GsonBuilder().disableHtmlEscaping().create().toJson(this))).build();
+        WFCMessage.MessageContent.Builder builder = WFCMessage.MessageContent.newBuilder().setType(groupContentType).setData(ByteString.copyFromUtf8(new GsonBuilder().disableHtmlEscaping().create().toJson(this)));
+        if(!StringUtil.isNullOrEmpty(extra)) {
+            builder.setExtra(extra);
+        }
+        return builder.build();
+
     }
 
     public WFCMessage.MessageContent getAddGroupNotifyContent() {

common/src/main/java/cn/wildfirechat/pojos/InputAddGroupMember.java

@@ -17,6 +17,7 @@ import java.util.List;
 public class InputAddGroupMember extends InputGroupBase {
     private String group_id;
     private List<PojoGroupMember> members;
+    private String member_extra;
 
     public String getGroup_id() {
         return group_id;
@@ -34,6 +35,14 @@ public class InputAddGroupMember extends InputGroupBase {
         this.members = members;
     }
 
+    public String getMember_extra() {
+        return member_extra;
+    }
+
+    public void setMemberExtra(String extra) {
+        this.member_extra = extra;
+    }
+
     public boolean isValide() {
         return true;
     }
@@ -41,6 +50,9 @@ public class InputAddGroupMember extends InputGroupBase {
     public WFCMessage.AddGroupMemberRequest toProtoGroupRequest() {
         WFCMessage.AddGroupMemberRequest.Builder addGroupBuilder = WFCMessage.AddGroupMemberRequest.newBuilder();
         addGroupBuilder.setGroupId(group_id);
+        if(!StringUtil.isNullOrEmpty(member_extra)) {
+            addGroupBuilder.setExtra(member_extra);
+        }
         for (PojoGroupMember pojoGroupMember : getMembers()) {
             WFCMessage.GroupMember.Builder groupMemberBuilder = WFCMessage.GroupMember.newBuilder().setMemberId(pojoGroupMember.getMember_id());
             if (!StringUtil.isNullOrEmpty(pojoGroupMember.getAlias())) {

common/src/main/java/cn/wildfirechat/pojos/InputCreateGroup.java

@@ -16,6 +16,7 @@ import java.util.List;
 
 public class InputCreateGroup extends InputGroupBase {
     private PojoGroup group;
+    private String member_extra;
 
     public boolean isValide() {
         return true;
@@ -87,6 +88,9 @@ public class InputCreateGroup extends InputGroupBase {
 
         WFCMessage.CreateGroupRequest.Builder createGroupReqBuilder = WFCMessage.CreateGroupRequest.newBuilder();
         createGroupReqBuilder.setGroup(groupBuilder);
+        if(!StringUtil.isNullOrEmpty(member_extra)) {
+            createGroupReqBuilder.setMemberExtra(member_extra);
+        }
         if (to_lines != null) {
             for (Integer line : to_lines
             ) {
@@ -107,4 +111,12 @@ public class InputCreateGroup extends InputGroupBase {
     public void setGroup(PojoGroup group) {
         this.group = group;
     }
+
+    public String getMember_extra() {
+        return member_extra;
+    }
+
+    public void setMember_extra(String member_extra) {
+        this.member_extra = member_extra;
+    }
 }