Implement per player scoreboard

arclight-common/src/main/java/io/izzel/arclight/common/mixin/core/scoreboard/ServerScoreboardMixin.java

@@ -0,0 +1,40 @@
+package io.izzel.arclight.common.mixin.core.scoreboard;
+
+import io.izzel.arclight.common.bridge.entity.player.ServerPlayerEntityBridge;
+import net.minecraft.entity.player.ServerPlayerEntity;
+import net.minecraft.network.IPacket;
+import net.minecraft.scoreboard.ServerScoreboard;
+import net.minecraft.server.management.PlayerList;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+@Mixin(ServerScoreboard.class)
+public class ServerScoreboardMixin {
+
+    @Redirect(method = "addObjective", at = @At(value = "INVOKE", target = "Lnet/minecraft/server/management/PlayerList;getPlayers()Ljava/util/List;"))
+    private List<ServerPlayerEntity> arclight$filterAdd(PlayerList playerList) {
+        return filterPlayer(playerList.getPlayers());
+    }
+
+    @Redirect(method = "sendDisplaySlotRemovalPackets", at = @At(value = "INVOKE", target = "Lnet/minecraft/server/management/PlayerList;getPlayers()Ljava/util/List;"))
+    private List<ServerPlayerEntity> arclight$filterRemove(PlayerList playerList) {
+        return filterPlayer(playerList.getPlayers());
+    }
+
+    @Redirect(method = "*", require = 11, at = @At(value = "INVOKE", target = "Lnet/minecraft/server/management/PlayerList;sendPacketToAllPlayers(Lnet/minecraft/network/IPacket;)V"))
+    private void arclight$sendToOwner(PlayerList playerList, IPacket<?> packetIn) {
+        for (ServerPlayerEntity entity : filterPlayer(playerList.getPlayers())) {
+            entity.connection.sendPacket(packetIn);
+        }
+    }
+
+    private List<ServerPlayerEntity> filterPlayer(List<ServerPlayerEntity> list) {
+        return list.stream()
+            .filter(it -> ((ServerPlayerEntityBridge) it).bridge$getBukkitEntity().getScoreboard().getHandle() == (Object) this)
+            .collect(Collectors.toList());
+    }
+}

arclight-common/src/main/resources/mixins.arclight.core.json

@@ -358,6 +358,7 @@
     "network.rcon.RConConsoleSourceMixin",
     "network.status.ServerStatusNetHandlerMixin",
     "potion.EffectMixin",
+    "scoreboard.ServerScoreboardMixin",
     "server.CustomServerBossInfoMixin",
     "server.MainMixin",
     "server.MinecraftServerMixin",