Implemented automatic co-op sector change sync

core/src/mindustry/net/WorldReloader.java

@@ -0,0 +1,59 @@
+package mindustry.net;
+
+import arc.struct.*;
+import arc.struct.Seq.*;
+import mindustry.gen.*;
+
+import static mindustry.Vars.*;
+
+/** Handles player state for sending to every connected player*/
+public class WorldReloader{
+    Seq<Player> players = new Seq<>();
+    boolean wasServer = false;
+    boolean began = false;
+
+    /** Begins reloading the world. Sends world begin packets to each user and stores player state.
+     *  If the current client is not a server, this resets state and disconnects. */
+    public void begin(){
+        //don't begin twice
+        if(began) return;
+
+        if(wasServer = net.server()){
+            players.clear();
+
+            for(Player p : Groups.player){
+                if(p.isLocal()) continue;
+
+                players.add(p);
+                p.clearUnit();
+            }
+
+            logic.reset();
+
+            Call.worldDataBegin();
+        }else{
+            net.reset();
+            logic.reset();
+        }
+
+        began = true;
+    }
+
+    /** Ends reloading the world. Sends world data to each player.
+     * If the current client was not a server, does nothing.*/
+    public void end(){
+        if(wasServer){
+            for(Player p : players){
+                if(p.con == null) continue;
+
+                boolean wasAdmin = p.admin;
+                p.reset();
+                p.admin = wasAdmin;
+                if(state.rules.pvp){
+                    p.team(netServer.assignTeam(p, new SeqIterable<>(players)));
+                }
+                netServer.sendWorldData(p);
+            }
+        }
+    }
+}