feat(multiplayer): join application.

HMCL/src/main/java/org/jackhuang/hmcl/ui/multiplayer/MultiplayerPage.java

@@ -210,8 +210,11 @@ public class MultiplayerPage extends Control implements DecoratorPage, PageAware
             int gamePort = result.getAd();
             try {
                 MultiplayerManager.CatoSession session = MultiplayerManager.createSession(config().getMultiplayerToken(), result.getMotd(), gamePort);
-                session.getServer().onClientAdding().register(event -> {
+                session.getServer().setOnClientAdding((client, resolveClient, rejectClient) -> {
-
+                    runInFX(() -> {
+                        Controllers.confirm(i18n("multiplayer.session.create.join.prompt", client.getUsername()), i18n("multiplayer.session.create.join"), MessageDialogPane.MessageType.INFO,
+                                resolveClient, () -> rejectClient.accept(""));
+                    });
                 });
                 session.getServer().onClientAdded().register(event -> {
                     runInFX(() -> {

HMCL/src/main/java/org/jackhuang/hmcl/ui/multiplayer/MultiplayerServer.java

@@ -18,7 +18,6 @@
 package org.jackhuang.hmcl.ui.multiplayer;
 
 import com.google.gson.JsonParseException;
-import org.jackhuang.hmcl.event.Event;
 import org.jackhuang.hmcl.event.EventManager;
 import org.jackhuang.hmcl.util.FutureCallback;
 import org.jackhuang.hmcl.util.Lang;
@@ -27,10 +26,8 @@ import org.jackhuang.hmcl.util.gson.JsonUtils;
 import java.io.*;
 import java.net.ServerSocket;
 import java.net.Socket;
-import java.util.HashMap;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.Future;
 import java.util.logging.Level;
 
 import static org.jackhuang.hmcl.ui.multiplayer.MultiplayerChannel.*;
@@ -106,7 +103,7 @@ public class MultiplayerServer extends Thread {
 
         try {
             if (client.socket.isConnected()) {
-                client.write(new KickResponse());
+                client.write(new KickResponse(""));
                 client.socket.close();
             }
         } catch (IOException e) {

HMCL/src/main/resources/assets/lang/I18N.properties

@@ -628,6 +628,8 @@ multiplayer.session.copy_room_code=Copy Invitation Code
 multiplayer.session.create=Create Room
 multiplayer.session.create.error=Failed to create multiplayer room.
 multiplayer.session.create.hint=Before creating multiplayer room, you must click "Open LAN Server" in running game, and type the port displayed in game in the blank below.
+multiplayer.session.create.join=Connection request
+multiplayer.session.create.join.prompt=Player %s wants to join the multiplayer session. Accept?
 multiplayer.session.create.members=Members
 multiplayer.session.create.members.kick=Kick
 multiplayer.session.create.members.kick.prompt=After kicking this player, the established connection with this player will be cut up.

HMCL/src/main/resources/assets/lang/I18N_zh.properties

@@ -628,6 +628,8 @@ multiplayer.session.copy_room_code=複製邀請碼
 multiplayer.session.create=創建房間
 multiplayer.session.create.error=創建聯機房間失敗。
 multiplayer.session.create.hint=創建聯機房間前，你需要先在正在運行的遊戲內的遊戲菜單中選擇 對區域網路開放 選項，然後在下方的輸入框中輸入遊戲內提示的埠號（通常是 5 位的數字）
+multiplayer.session.create.join=連接申請
+multiplayer.session.create.join.prompt=玩家 %s 申請加入多人聯機房間，是否接受？
 multiplayer.session.create.members=成員
 multiplayer.session.create.members.kick=踢出房間
 multiplayer.session.create.members.kick.prompt=是否踢出該玩家？踢出後該玩家不能再參與該聯機房間。

HMCL/src/main/resources/assets/lang/I18N_zh_CN.properties

@@ -628,6 +628,8 @@ multiplayer.session.copy_room_code=复制邀请码
 multiplayer.session.create=创建房间
 multiplayer.session.create.error=创建联机房间失败。
 multiplayer.session.create.hint=创建联机房间前，你需要先在正在运行的游戏内的游戏菜单中选择 对局域网开放 选项，然后在下方的输入框中确认游戏内提示的端口号（通常是 5 位的数字）
+multiplayer.session.create.join=连接申请
+multiplayer.session.create.join.prompt=玩家 %s 申请加入多人联机房间，是否接受？
 multiplayer.session.create.members=成员
 multiplayer.session.create.members.kick=踢出房间
 multiplayer.session.create.members.kick.prompt=是否踢出该玩家？踢出后该玩家不能再参与该联机房间。