From c2a79a19eb1cf82600ef07ca47fc7333ede0c4c8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Florian=20N=C3=BCcke?= <florian@nuecke.de>
Date: Sun, 18 Sep 2016 19:39:35 +0200
Subject: [PATCH] Power mountables without requiring them to be connected to
 the outside. Closes #2020.

---
 .../li/cil/oc/common/tileentity/Rack.scala    | 34 ++++++++++++++-----
 1 file changed, 26 insertions(+), 8 deletions(-)

diff --git a/src/main/scala/li/cil/oc/common/tileentity/Rack.scala b/src/main/scala/li/cil/oc/common/tileentity/Rack.scala
index 2d1465e08..bf7ba7f26 100644
--- a/src/main/scala/li/cil/oc/common/tileentity/Rack.scala
+++ b/src/main/scala/li/cil/oc/common/tileentity/Rack.scala
@@ -383,15 +383,33 @@ class Rack extends traits.PowerAcceptor with traits.Hub with traits.PowerBalance
   override def updateEntity() {
     super.updateEntity()
     if (isServer && isConnected) {
+      lazy val connectors = ForgeDirection.VALID_DIRECTIONS.map(sidedNode).collect {
+        case connector: Connector => connector
+      }
       components.zipWithIndex.collect {
-        case (Some(mountable: RackMountable), slot) if hasChanged(slot) =>
-          hasChanged(slot) = false
-          lastData(slot) = mountable.getData
-          ServerPacketSender.sendRackMountableData(this, slot)
-          world.notifyBlocksOfNeighborChange(x, y, z, block)
-          // These are working state dependent, so recompute them.
-          isOutputEnabled = hasRedstoneCard
-          isAbstractBusAvailable = hasAbstractBusCard
+        case (Some(mountable: RackMountable), slot) =>
+          if (hasChanged(slot)) {
+            hasChanged(slot) = false
+            lastData(slot) = mountable.getData
+            ServerPacketSender.sendRackMountableData(this, slot)
+            world.notifyBlocksOfNeighborChange(x, y, z, block)
+            // These are working state dependent, so recompute them.
+            isOutputEnabled = hasRedstoneCard
+            isAbstractBusAvailable = hasAbstractBusCard
+          }
+
+          // Power mountables without requiring them to be connected to the outside.
+          mountable.node match {
+            case connector: Connector =>
+              var remaining = Settings.get.serverRackRate
+              for (outside <- connectors if remaining > 0) {
+                val received = remaining + outside.changeBuffer(-remaining)
+                val rejected = connector.changeBuffer(received)
+                outside.changeBuffer(rejected)
+                remaining -= received - rejected
+              }
+            case _ => // Nothing using energy.
+          }
       }
 
       updateComponents()