Fix team leader stepdown and leaving

Signed-off-by: Lixfel <agga-games@gmx.de>

src/de/steamwar/bungeecore/commands/TeamCommand.java

@@ -188,7 +188,7 @@ public class TeamCommand extends SWCommand {
         if(notLeader(player, user))
             return;
 
-        if(team.size() > 1 && team.getMembers().stream().map(SteamwarUser::get).filter(member -> user != member).noneMatch(SteamwarUser::isLeader)){
+        if(noRemainingLeaders(team, user)){
             Message.send("TEAM_OTHER_LEADER_REQUIRED", player);
             return;
         }
@@ -205,7 +205,7 @@ public class TeamCommand extends SWCommand {
             return;
 
         int teamSize = team.size();
-        if(teamSize > 1 && user.isLeader() && team.getMembers().stream().map(SteamwarUser::get).filter(member -> user != member).noneMatch(SteamwarUser::isLeader)){
+        if(teamSize > 1 && user.isLeader() && noRemainingLeaders(team, user)) {
             Message.send("TEAM_OTHER_LEADER_REQUIRED", player);
             return;
         }
@@ -219,6 +219,10 @@ public class TeamCommand extends SWCommand {
         Message.send("TEAM_LEAVE_LEFT", player);
     }
 
+    private boolean noRemainingLeaders(Team team, SteamwarUser except) {
+        return SteamwarUser.getTeam(team.getTeamId()).stream().filter(member -> except.getId() != member.getId()).noneMatch(SteamwarUser::isLeader);
+    }
+
 
     @Register(value = "invite", description = "TEAM_INVITE_USAGE")
     public void invite(ProxiedPlayer player, String toInvite){