Showing indicator for disk activity on disk drives, cases and server racks.

src/main/java/li/cil/oc/api/event/FileSystemAccessEvent.java

@@ -2,11 +2,13 @@ package li.cil.oc.api.event;
 
 import cpw.mods.fml.common.eventhandler.Cancelable;
 import cpw.mods.fml.common.eventhandler.Event;
+import li.cil.oc.api.network.Node;
+import net.minecraft.nbt.NBTTagCompound;
 import net.minecraft.tileentity.TileEntity;
 import net.minecraft.world.World;
 
 /**
- * Fired on the <em>client side only</em>, signals file system access.
+ * Events for handling file system access and representing it on the client.
  * <p/>
  * This is used to play file system access sounds and render disk activity
  * indicators on some containers (e.g. disk drive, computer, server).
@@ -19,52 +21,35 @@ import net.minecraft.world.World;
  */
 @Cancelable
 public class FileSystemAccessEvent extends Event {
-    /**
-     * The name of the sound effect to play for the file system.
-     */
-    public final String sound;
+    protected String sound;
 
-    /**
-     * The world the file system lives in.
-     */
-    public final World world;
+    protected World world;
 
-    /**
-     * The x coordinate of the file system's container.
-     */
-    public final double x;
+    protected double x;
 
-    /**
-     * The y coordinate of the file system's container.
-     */
-    public final double y;
+    protected double y;
 
-    /**
-     * The z coordinate of the file system's container.
-     */
-    public final double z;
+    protected double z;
 
-    /**
-     * The tile entity hosting the file system.
-     * <p/>
-     * <em>Important</em>: this can be <tt>null</tt>, which is usually the
-     * case when the container is an entity or item.
-     */
-    public final TileEntity tileEntity;
+    protected TileEntity tileEntity;
+
+    protected NBTTagCompound data;
 
     /**
      * Constructor for tile entity hosted file systems.
      *
      * @param sound      the name of the sound effect to play.
      * @param tileEntity the tile entity hosting the file system.
+     * @param data       the additional data.
      */
-    public FileSystemAccessEvent(String sound, TileEntity tileEntity) {
+    protected FileSystemAccessEvent(String sound, TileEntity tileEntity, NBTTagCompound data) {
         this.sound = sound;
         this.world = tileEntity.getWorldObj();
         this.x = tileEntity.xCoord + 0.5;
         this.y = tileEntity.yCoord + 0.5;
         this.z = tileEntity.zCoord + 0.5;
         this.tileEntity = tileEntity;
+        this.data = data;
     }
 
     /**
@@ -75,13 +60,116 @@ public class FileSystemAccessEvent extends Event {
      * @param x     the x coordinate of the file system's container.
      * @param y     the y coordinate of the file system's container.
      * @param z     the z coordinate of the file system's container.
+     * @param data  the additional data.
      */
-    public FileSystemAccessEvent(String sound, World world, double x, double y, double z) {
+    protected FileSystemAccessEvent(String sound, World world, double x, double y, double z, NBTTagCompound data) {
         this.sound = sound;
         this.world = world;
         this.x = x;
         this.y = y;
         this.z = z;
         this.tileEntity = null;
+        this.data = data;
+    }
+
+    /**
+     * The name of the sound effect to play for the file system.
+     */
+    public String getSound() {
+        return sound;
+    }
+
+    /**
+     * The world the file system lives in.
+     */
+    public World getWorld() {
+        return world;
+    }
+
+    /**
+     * The x coordinate of the file system's container.
+     */
+    public double getX() {
+        return x;
+    }
+
+    /**
+     * The y coordinate of the file system's container.
+     */
+    public double getY() {
+        return y;
+    }
+
+    /**
+     * The z coordinate of the file system's container.
+     */
+    public double getZ() {
+        return z;
+    }
+
+    /**
+     * The tile entity hosting the file system.
+     * <p/>
+     * <em>Important</em>: this can be <tt>null</tt>, which is usually the
+     * case when the container is an entity or item.
+     */
+    public TileEntity getTileEntity() {
+        return tileEntity;
+    }
+
+    /**
+     * Addition custom data, this is used to transmit the number of the server
+     * in a server rack the file system lives in, for example.
+     */
+    public NBTTagCompound getData() {
+        return data;
+    }
+
+    public static final class Server extends FileSystemAccessEvent {
+        private Node node;
+
+        public Server(String sound, TileEntity tileEntity, Node node) {
+            super(sound, tileEntity, new NBTTagCompound());
+            this.node = node;
+        }
+
+        public Server(String sound, World world, double x, double y, double z, Node node) {
+            super(sound, world, x, y, z, new NBTTagCompound());
+            this.node = node;
+        }
+
+        /**
+         * The node of the file system that signalled activity.
+         */
+        public Node getNode() {
+            return node;
+        }
+    }
+
+    public static final class Client extends FileSystemAccessEvent {
+        /**
+         * Constructor for tile entity hosted file systems.
+         *
+         * @param sound      the name of the sound effect to play.
+         * @param tileEntity the tile entity hosting the file system.
+         * @param data       the additional data.
+         */
+        public Client(String sound, TileEntity tileEntity, NBTTagCompound data) {
+            super(sound, tileEntity, data);
+        }
+
+        /**
+         * Constructor for arbitrarily hosted file systems.
+         *
+         * @param sound the name of the sound effect to play.
+         * @param world the world the file system lives in.
+         * @param x     the x coordinate of the file system's container.
+         * @param y     the y coordinate of the file system's container.
+         * @param z     the z coordinate of the file system's container.
+         * @param data  the additional data.
+         */
+        public Client(String sound, World world, double x, double y, double z, NBTTagCompound data) {
+            super(sound, world, x, y, z, data);
+        }
     }
 }

src/main/resources/assets/opencomputers/loot/OpenOS/bin/install.lua

@@ -52,11 +52,12 @@ local result, reason = os.execute("/bin/cp -vr /mnt/" .. boot .. "/* /mnt/" .. m
 if not result then
   error(reason, 0)
 end
-computer.setBootAddress(choice.address)
+choice.setLabel("OpenOS")
 
-print("All done! Would you like to reboot now? [Y/n]")
+print("All done! Set as boot device and reboot now? [Y/n]")
 local result = io.read()
 if not result or result == "" or result:sub(1, 1):lower() == "y" then
+  computer.setBootAddress(choice.address)
   print("\nRebooting now!")
   computer.shutdown(true)
 end

src/main/scala/li/cil/oc/client/PacketHandler.scala

@@ -17,6 +17,7 @@ import li.cil.oc.util.Audio
 import net.minecraft.client.Minecraft
 import net.minecraft.client.gui.GuiScreen
 import net.minecraft.entity.player.EntityPlayer
+import net.minecraft.nbt.CompressedStreamTools
 import net.minecraftforge.common.MinecraftForge
 import net.minecraftforge.common.util.ForgeDirection
 import org.lwjgl.input.Keyboard
@@ -145,9 +146,10 @@ object PacketHandler extends CommonPacketHandler {
 
   def onFileSystemActivity(p: PacketParser) = {
     val sound = p.readUTF()
+    val data = CompressedStreamTools.read(p)
     if (p.readBoolean()) p.readTileEntity[net.minecraft.tileentity.TileEntity]() match {
       case Some(t) =>
-        MinecraftForge.EVENT_BUS.post(new FileSystemAccessEvent(sound, t))
+        MinecraftForge.EVENT_BUS.post(new FileSystemAccessEvent.Client(sound, t, data))
       case _ => // Invalid packet.
     }
     else world(p.player, p.readInt()) match {
@@ -155,7 +157,7 @@ object PacketHandler extends CommonPacketHandler {
         val x = p.readDouble()
         val y = p.readDouble()
         val z = p.readDouble()
-        MinecraftForge.EVENT_BUS.post(new FileSystemAccessEvent(sound, world, x, y, z))
+        MinecraftForge.EVENT_BUS.post(new FileSystemAccessEvent.Client(sound, world, x, y, z, data))
       case _ => // Invalid packet.
     }
   }

src/main/scala/li/cil/oc/client/Proxy.scala

@@ -16,7 +16,7 @@ import li.cil.oc.client.renderer.block.BlockRenderer
 import li.cil.oc.client.renderer.item.ItemRenderer
 import li.cil.oc.client.renderer.tileentity._
 import li.cil.oc.common.component.TextBuffer
-import li.cil.oc.common.event.FileAccessHandler
+import li.cil.oc.common.event.FileSystemAccessHandler
 import li.cil.oc.common.init.Items
 import li.cil.oc.common.tileentity
 import li.cil.oc.common.tileentity.ServerRack
@@ -61,7 +61,7 @@ private[oc] class Proxy extends CommonProxy {
     ClientRegistry.registerKeyBinding(KeyBindings.materialCosts)
     ClientRegistry.registerKeyBinding(KeyBindings.clipboardPaste)
 
-    MinecraftForge.EVENT_BUS.register(FileAccessHandler)
+    MinecraftForge.EVENT_BUS.register(FileSystemAccessHandler)
     MinecraftForge.EVENT_BUS.register(PetRenderer)
     MinecraftForge.EVENT_BUS.register(ServerRack)
     MinecraftForge.EVENT_BUS.register(TextBuffer)

src/main/scala/li/cil/oc/client/Textures.scala

@@ -30,8 +30,11 @@ object Textures {
   val guiSlot = new ResourceLocation(Settings.resourceDomain, "textures/gui/slot.png")
 
   val blockCaseFrontOn = new ResourceLocation(Settings.resourceDomain, "textures/blocks/CaseFrontOn.png")
+  val blockCaseFrontActivity = new ResourceLocation(Settings.resourceDomain, "textures/blocks/CaseFrontActivity.png")
+  val blockDiskDriveFrontActivity = new ResourceLocation(Settings.resourceDomain, "textures/blocks/DiskDriveFrontActivity.png")
   val blockHologram = new ResourceLocation(Settings.resourceDomain, "textures/blocks/HologramEffect.png")
   val blockRackFrontOn = new ResourceLocation(Settings.resourceDomain, "textures/blocks/ServerRackFrontOn.png")
+  val blockRackFrontActivity = new ResourceLocation(Settings.resourceDomain, "textures/blocks/ServerRackFrontActivity.png")
   val blockRobot = new ResourceLocation(Settings.resourceDomain, "textures/blocks/robot.png")
   val blockScreenUpIndicator = new ResourceLocation(Settings.resourceDomain, "textures/blocks/screen/up_indicator.png")
 

src/main/scala/li/cil/oc/client/renderer/tileentity/CaseRenderer.scala

@@ -14,27 +14,27 @@ object CaseRenderer extends TileEntitySpecialRenderer {
     RenderState.checkError(getClass.getName + ".renderTileEntityAt: entering (aka: wasntme)")
 
     val computer = tileEntity.asInstanceOf[Case]
+    GL11.glPushAttrib(GL11.GL_ALL_ATTRIB_BITS)
+
+    RenderState.disableLighting()
+    RenderState.makeItBlend()
+    RenderState.setBlendAlpha(1)
+
+    GL11.glPushMatrix()
+
+    GL11.glTranslated(x + 0.5, y + 0.5, z + 0.5)
+
+    computer.yaw match {
+      case ForgeDirection.WEST => GL11.glRotatef(-90, 0, 1, 0)
+      case ForgeDirection.NORTH => GL11.glRotatef(180, 0, 1, 0)
+      case ForgeDirection.EAST => GL11.glRotatef(90, 0, 1, 0)
+      case _ => // No yaw.
+    }
+
+    GL11.glTranslatef(-0.5f, 0.5f, 0.501f)
+    GL11.glScalef(1, -1, 1)
+
     if (computer.isRunning) {
-      GL11.glPushAttrib(GL11.GL_ALL_ATTRIB_BITS)
-
-      RenderState.disableLighting()
-      RenderState.makeItBlend()
-      RenderState.setBlendAlpha(1)
-
-      GL11.glPushMatrix()
-
-      GL11.glTranslated(x + 0.5, y + 0.5, z + 0.5)
-
-      computer.yaw match {
-        case ForgeDirection.WEST => GL11.glRotatef(-90, 0, 1, 0)
-        case ForgeDirection.NORTH => GL11.glRotatef(180, 0, 1, 0)
-        case ForgeDirection.EAST => GL11.glRotatef(90, 0, 1, 0)
-        case _ => // No yaw.
-      }
-
-      GL11.glTranslatef(-0.5f, 0.5f, 0.501f)
-      GL11.glScalef(1, -1, 1)
-
       bindTexture(Textures.blockCaseFrontOn)
       val t = Tessellator.instance
       t.startDrawingQuads()
@@ -44,10 +44,21 @@ object CaseRenderer extends TileEntitySpecialRenderer {
       t.addVertexWithUV(0, 0, 0, 0, 0)
       t.draw()
 
-      GL11.glPopMatrix()
-      GL11.glPopAttrib()
+      if (System.currentTimeMillis() - computer.lastAccess < 400 && computer.world.rand.nextDouble() > 0.1) {
+        bindTexture(Textures.blockCaseFrontActivity)
+        val t = Tessellator.instance
+        t.startDrawingQuads()
+        t.addVertexWithUV(0, 1, 0, 0, 1)
+        t.addVertexWithUV(1, 1, 0, 1, 1)
+        t.addVertexWithUV(1, 0, 0, 1, 0)
+        t.addVertexWithUV(0, 0, 0, 0, 0)
+        t.draw()
+      }
     }
 
+    GL11.glPopMatrix()
+    GL11.glPopAttrib()
+
     RenderState.checkError(getClass.getName + ".renderTileEntityAt: leaving")
   }
 }

src/main/scala/li/cil/oc/client/renderer/tileentity/DiskDriveRenderer.scala

@@ -1,8 +1,10 @@
 package li.cil.oc.client.renderer.tileentity
 
+import li.cil.oc.client.Textures
 import li.cil.oc.common.tileentity.DiskDrive
 import li.cil.oc.util.RenderState
 import net.minecraft.client.renderer.OpenGlHelper
+import net.minecraft.client.renderer.Tessellator
 import net.minecraft.client.renderer.entity.RenderItem
 import net.minecraft.client.renderer.entity.RenderManager
 import net.minecraft.client.renderer.tileentity.TileEntitySpecialRenderer
@@ -16,39 +18,59 @@ object DiskDriveRenderer extends TileEntitySpecialRenderer {
     RenderState.checkError(getClass.getName + ".renderTileEntityAt: entering (aka: wasntme)")
 
     val drive = tileEntity.asInstanceOf[DiskDrive]
+    GL11.glPushAttrib(GL11.GL_ALL_ATTRIB_BITS)
+
+    GL11.glPushMatrix()
+
+    GL11.glTranslated(x + 0.5, y + 0.5, z + 0.5)
+
+    drive.yaw match {
+      case ForgeDirection.WEST => GL11.glRotatef(-90, 0, 1, 0)
+      case ForgeDirection.NORTH => GL11.glRotatef(180, 0, 1, 0)
+      case ForgeDirection.EAST => GL11.glRotatef(90, 0, 1, 0)
+      case _ => // No yaw.
+    }
+
     drive.items(0) match {
       case Some(stack) =>
-        GL11.glPushAttrib(GL11.GL_ALL_ATTRIB_BITS)
+        GL11.glPushMatrix()
+        GL11.glTranslatef(0, 3.5f / 16, 9 / 16f)
+        GL11.glRotatef(90, -1, 0, 0)
 
         val brightness = drive.world.getLightBrightnessForSkyBlocks(drive.x + drive.facing.offsetX, drive.y + drive.facing.offsetY, drive.z + drive.facing.offsetZ, 0)
         OpenGlHelper.setLightmapTextureCoords(OpenGlHelper.lightmapTexUnit, brightness % 65536, brightness / 65536)
 
-        GL11.glPushMatrix()
-
-        GL11.glTranslated(x + 0.5, y + 0.5, z + 0.5)
-
-        drive.yaw match {
-          case ForgeDirection.WEST => GL11.glRotatef(-90, 0, 1, 0)
-          case ForgeDirection.NORTH => GL11.glRotatef(180, 0, 1, 0)
-          case ForgeDirection.EAST => GL11.glRotatef(90, 0, 1, 0)
-          case _ => // No yaw.
-        }
-
-        GL11.glTranslatef(0, 3.5f / 16, 9 / 16f)
-        GL11.glRotatef(90, -1, 0, 0)
-
         // This is very 'meh', but item frames do it like this, too!
         val entity = new EntityItem(drive.world, 0, 0, 0, stack)
         entity.hoverStart = 0
         RenderItem.renderInFrame = true
         RenderManager.instance.renderEntityWithPosYaw(entity, 0, 0, 0, 0, 0)
         RenderItem.renderInFrame = false
-
         GL11.glPopMatrix()
-        GL11.glPopAttrib()
       case _ =>
     }
 
+    if (System.currentTimeMillis() - drive.lastAccess < 400 && drive.world.rand.nextDouble() > 0.1) {
+      GL11.glTranslatef(-0.5f, 0.5f, 0.501f)
+      GL11.glScalef(1, -1, 1)
+
+      RenderState.disableLighting()
+      RenderState.makeItBlend()
+      RenderState.setBlendAlpha(1)
+
+      bindTexture(Textures.blockDiskDriveFrontActivity)
+      val t = Tessellator.instance
+      t.startDrawingQuads()
+      t.addVertexWithUV(0, 1, 0, 0, 1)
+      t.addVertexWithUV(1, 1, 0, 1, 1)
+      t.addVertexWithUV(1, 0, 0, 1, 0)
+      t.addVertexWithUV(0, 0, 0, 0, 0)
+      t.draw()
+    }
+
+    GL11.glPopMatrix()
+    GL11.glPopAttrib()
+
     RenderState.checkError(getClass.getName + ".renderTileEntityAt: leaving")
   }
 }

src/main/scala/li/cil/oc/client/renderer/tileentity/ServerRackRenderer.scala

@@ -14,33 +14,44 @@ object ServerRackRenderer extends TileEntitySpecialRenderer {
     RenderState.checkError(getClass.getName + ".renderTileEntityAt: entering (aka: wasntme)")
 
     val rack = tileEntity.asInstanceOf[ServerRack]
+    GL11.glPushAttrib(GL11.GL_ALL_ATTRIB_BITS)
+
+    RenderState.disableLighting()
+    RenderState.makeItBlend()
+
+    GL11.glPushMatrix()
+
+    GL11.glTranslated(x + 0.5, y + 0.5, z + 0.5)
+
+    rack.yaw match {
+      case ForgeDirection.WEST => GL11.glRotatef(-90, 0, 1, 0)
+      case ForgeDirection.NORTH => GL11.glRotatef(180, 0, 1, 0)
+      case ForgeDirection.EAST => GL11.glRotatef(90, 0, 1, 0)
+      case _ => // No yaw.
+    }
+
+    GL11.glTranslatef(-0.5f, 0.5f, 0.501f)
+    GL11.glScalef(1, -1, 1)
+
     if (rack.anyRunning) {
-      GL11.glPushAttrib(GL11.GL_ALL_ATTRIB_BITS)
-
-      RenderState.disableLighting()
-      RenderState.makeItBlend()
-
-      GL11.glPushMatrix()
-
-      GL11.glTranslated(x + 0.5, y + 0.5, z + 0.5)
-
-      rack.yaw match {
-        case ForgeDirection.WEST => GL11.glRotatef(-90, 0, 1, 0)
-        case ForgeDirection.NORTH => GL11.glRotatef(180, 0, 1, 0)
-        case ForgeDirection.EAST => GL11.glRotatef(90, 0, 1, 0)
-        case _ => // No yaw.
-      }
-
-      GL11.glTranslatef(-0.5f, 0.5f, 0.501f)
-      GL11.glScalef(1, -1, 1)
-
-      bindTexture(Textures.blockRackFrontOn)
-
       val v1 = 2 / 16f
       val fs = 3 / 16f
       for (i <- 0 until 4 if rack.isRunning(i)) {
         val l = v1 + i * fs
         val h = v1 + (i + 1) * fs
+        bindTexture(Textures.blockRackFrontOn)
+        val t = Tessellator.instance
+        t.startDrawingQuads()
+        t.addVertexWithUV(0, h, 0, 0, h)
+        t.addVertexWithUV(1, h, 0, 1, h)
+        t.addVertexWithUV(1, l, 0, 1, l)
+        t.addVertexWithUV(0, l, 0, 0, l)
+        t.draw()
+      }
+      for (i <- 0 until 4 if System.currentTimeMillis() - rack.lastAccess(i) < 400 && rack.world.rand.nextDouble() > 0.1) {
+        val l = v1 + i * fs
+        val h = v1 + (i + 1) * fs
+        bindTexture(Textures.blockRackFrontActivity)
         val t = Tessellator.instance
         t.startDrawingQuads()
         t.addVertexWithUV(0, h, 0, 0, h)
@@ -49,11 +60,11 @@ object ServerRackRenderer extends TileEntitySpecialRenderer {
         t.addVertexWithUV(0, l, 0, 0, l)
         t.draw()
       }
-
-      GL11.glPopMatrix()
-      GL11.glPopAttrib()
     }
 
+    GL11.glPopMatrix()
+    GL11.glPopAttrib()
+
     RenderState.checkError(getClass.getName + ".renderTileEntityAt: leaving")
   }
 }

src/main/scala/li/cil/oc/common/event/FileAccessHandler.scala

@@ -1,13 +0,0 @@
-package li.cil.oc.common.event
-
-import cpw.mods.fml.common.eventhandler.SubscribeEvent
-import li.cil.oc.Settings
-import li.cil.oc.api.event.FileSystemAccessEvent
-
-object FileAccessHandler {
-  @SubscribeEvent
-  def onFileSystemAccess(e: FileSystemAccessEvent) {
-    val volume = Settings.get.soundVolume
-    e.world.playSound(e.x, e.y, e.z, e.sound, volume, 1, false)
-  }
-}

src/main/scala/li/cil/oc/common/event/FileSystemAccessHandler.scala

@@ -0,0 +1,36 @@
+package li.cil.oc.common.event
+
+import cpw.mods.fml.common.eventhandler.SubscribeEvent
+import li.cil.oc.Settings
+import li.cil.oc.api.event.FileSystemAccessEvent
+import li.cil.oc.common.tileentity.Case
+import li.cil.oc.common.tileentity.DiskDrive
+import li.cil.oc.common.tileentity.ServerRack
+
+object FileSystemAccessHandler {
+  @SubscribeEvent
+  def onFileSystemAccess(e: FileSystemAccessEvent.Server) {
+    e.getTileEntity match {
+      case t: ServerRack =>
+        val serverSlot = t.servers.indexWhere {
+          case Some(server) => server.componentSlot(e.getNode.address) >= 0
+          case _ => false
+        }
+        if (serverSlot < 0) e.setCanceled(true)
+        else e.getData.setInteger("server", serverSlot)
+      case _ =>
+    }
+  }
+
+  @SubscribeEvent
+  def onFileSystemAccess(e: FileSystemAccessEvent.Client) {
+    val volume = Settings.get.soundVolume
+    e.getWorld.playSound(e.getX, e.getY, e.getZ, e.getSound, volume, 1, false)
+    e.getTileEntity match {
+      case t: DiskDrive => t.lastAccess = System.currentTimeMillis()
+      case t: Case => t.lastAccess = System.currentTimeMillis()
+      case t: ServerRack => t.lastAccess(e.getData.getInteger("server")) = System.currentTimeMillis()
+      case _ =>
+    }
+  }
+}

src/main/scala/li/cil/oc/common/tileentity/Case.scala

@@ -20,6 +20,9 @@ import net.minecraftforge.common.util.ForgeDirection
 class Case(var tier: Int) extends traits.PowerAcceptor with traits.Computer with traits.Colored {
   def this() = this(0)
 
+  // Used on client side to check whether to render disk activity indicators.
+  var lastAccess = 0L
+
   color = Color.byTier(tier)
 
   @SideOnly(Side.CLIENT)

src/main/scala/li/cil/oc/common/tileentity/DiskDrive.scala

@@ -18,6 +18,9 @@ import net.minecraft.nbt.NBTTagCompound
 class DiskDrive extends traits.Environment with traits.ComponentInventory with traits.Rotatable with Analyzable {
   val node = api.Network.newNode(this, Visibility.None).create()
 
+  // Used on client side to check whether to render disk activity indicators.
+  var lastAccess = 0L
+
   // ----------------------------------------------------------------------- //
 
   override def onAnalyze(player: EntityPlayer, side: Int, hitX: Float, hitY: Float, hitZ: Float) =

src/main/scala/li/cil/oc/common/tileentity/ServerRack.scala

@@ -51,6 +51,9 @@ class ServerRack extends traits.PowerAcceptor with traits.Hub with traits.PowerB
   // For client side rendering.
   var isPresent = Array.fill[Option[String]](getSizeInventory)(None)
 
+  // Used on client side to check whether to render disk activity indicators.
+  var lastAccess = Array.fill(4)(0L)
+
   @SideOnly(Side.CLIENT)
   override protected def hasConnector(side: ForgeDirection) = side != facing
 

src/main/scala/li/cil/oc/server/PacketSender.scala

@@ -2,13 +2,17 @@ package li.cil.oc.server
 
 import li.cil.oc.api.component.TextBuffer.ColorDepth
 import li.cil.oc.api.driver.EnvironmentHost
+import li.cil.oc.api.event.FileSystemAccessEvent
+import li.cil.oc.api.network.Node
 import li.cil.oc.common._
 import li.cil.oc.common.tileentity.traits._
 import li.cil.oc.util.PackedColor
 import net.minecraft.entity.player.EntityPlayerMP
 import net.minecraft.item.ItemStack
+import net.minecraft.nbt.CompressedStreamTools
 import net.minecraft.nbt.NBTTagCompound
 import net.minecraft.world.World
+import net.minecraftforge.common.MinecraftForge
 import net.minecraftforge.common.util.ForgeDirection
 
 import scala.collection.mutable
@@ -81,28 +85,36 @@ object PacketSender {
   // Avoid spamming the network with disk activity notices.
   val fileSystemAccessTimeouts = mutable.WeakHashMap.empty[EnvironmentHost, mutable.Map[String, Long]]
 
-  def sendFileSystemActivity(host: EnvironmentHost, name: String) = fileSystemAccessTimeouts.synchronized {
+  def sendFileSystemActivity(node: Node, host: EnvironmentHost, name: String) = fileSystemAccessTimeouts.synchronized {
     fileSystemAccessTimeouts.get(host) match {
       case Some(hostTimeouts) if hostTimeouts.getOrElse(name, 0L) > System.currentTimeMillis() => // Cooldown.
       case _ =>
-        fileSystemAccessTimeouts.getOrElseUpdate(host, mutable.Map.empty) += name -> (System.currentTimeMillis() + 500)
-
-        val pb = new SimplePacketBuilder(PacketType.FileSystemActivity)
-
-        pb.writeUTF(name)
-        host match {
-          case t: net.minecraft.tileentity.TileEntity =>
-            pb.writeBoolean(true)
-            pb.writeTileEntity(t)
-          case _ =>
-            pb.writeBoolean(false)
-            pb.writeInt(host.world.provider.dimensionId)
-            pb.writeDouble(host.xPosition)
-            pb.writeDouble(host.yPosition)
-            pb.writeDouble(host.zPosition)
+        val event = host match {
+          case t: net.minecraft.tileentity.TileEntity => new FileSystemAccessEvent.Server(name, t, node)
+          case _ => new FileSystemAccessEvent.Server(name, host.world, host.xPosition, host.yPosition, host.zPosition, node)
         }
+        MinecraftForge.EVENT_BUS.post(event)
+        if (!event.isCanceled) {
+          fileSystemAccessTimeouts.getOrElseUpdate(host, mutable.Map.empty) += name -> (System.currentTimeMillis() + 500)
 
-        pb.sendToPlayersNearHost(host, 64)
+          val pb = new SimplePacketBuilder(PacketType.FileSystemActivity)
+
+          pb.writeUTF(event.getSound)
+          CompressedStreamTools.write(event.getData, pb)
+          event.getTileEntity match {
+            case t: net.minecraft.tileentity.TileEntity =>
+              pb.writeBoolean(true)
+              pb.writeTileEntity(t)
+            case _ =>
+              pb.writeBoolean(false)
+              pb.writeInt(event.getWorld.provider.dimensionId)
+              pb.writeDouble(event.getX)
+              pb.writeDouble(event.getY)
+              pb.writeDouble(event.getZ)
+          }
+
+          pb.sendToPlayersNearHost(host, 64)
+        }
     }
   }
 

src/main/scala/li/cil/oc/server/component/FileSystem.scala

@@ -313,7 +313,7 @@ class FileSystem(val fileSystem: IFileSystem, var label: Label, val host: Option
 
   private def diskActivity() {
     (sound, host) match {
-      case (Some(s), Some(h)) => ServerPacketSender.sendFileSystemActivity(h, s)
+      case (Some(s), Some(h)) => ServerPacketSender.sendFileSystemActivity(node, h, s)
       case _ =>
     }
   }