Set channel size limit to 1024 (#247)

Because we can run atm6 and it has lots of mods

arclight-common/src/main/java/io/izzel/arclight/common/mixin/bukkit/CraftEntityMixin.java

@@ -35,6 +35,7 @@ import org.bukkit.craftbukkit.v.entity.CraftGolem;
 import org.bukkit.craftbukkit.v.entity.CraftTameableAnimal;
 import org.bukkit.entity.EntityType;
 import org.jetbrains.annotations.NotNull;
+import org.spongepowered.asm.mixin.Final;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.Shadow;
 import org.spongepowered.asm.mixin.injection.At;
@@ -48,6 +49,7 @@ import java.util.Objects;
 public abstract class CraftEntityMixin implements org.bukkit.entity.Entity {
 
     @Shadow protected Entity entity;
+    @Shadow @Final protected CraftServer server;
 
     private EntityType arclight$type;
 

arclight-common/src/main/java/io/izzel/arclight/common/mixin/bukkit/CraftPlayerMixin.java

@@ -0,0 +1,32 @@
+package io.izzel.arclight.common.mixin.bukkit;
+
+import com.google.common.base.Preconditions;
+import org.bukkit.craftbukkit.v.entity.CraftPlayer;
+import org.bukkit.event.player.PlayerRegisterChannelEvent;
+import org.bukkit.plugin.messaging.StandardMessenger;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Overwrite;
+import org.spongepowered.asm.mixin.Shadow;
+
+import java.util.Set;
+
+@Mixin(value = CraftPlayer.class, remap = false)
+public abstract class CraftPlayerMixin extends CraftEntityMixin {
+
+    @Shadow @Final private Set<String> channels;
+
+    /**
+     * @author IzzelAliz
+     * @reason
+     */
+    @Overwrite
+    @SuppressWarnings("deprecation")
+    public void addChannel(String channel) {
+        Preconditions.checkState(this.channels.size() < 1024, "Cannot register channel '%s'. Too many channels registered!", channel);
+        channel = StandardMessenger.validateAndCorrectChannel(channel);
+        if (this.channels.add(channel)) {
+            this.server.getPluginManager().callEvent(new PlayerRegisterChannelEvent((CraftPlayer) (Object) this, channel));
+        }
+    }
+}

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

@@ -27,6 +27,7 @@
     "CraftLegacyUtilMixin",
     "CraftMagicNumbersMixin",
     "CraftMetaItemMixin",
+    "CraftPlayerMixin",
     "CraftServerMixin",
     "CraftVillagerMixin",
     "CraftWorldMixin",