add fluid container item, close #3533

changelog.md

@@ -1,5 +1,6 @@
 ## Fixes/improvements
 
+* [#3533] Added support for observing the contents of fluid container items.
 * [#3620] Fixed OC 1.8.0+ regression involving API arguments and numbers.
 * [#3013] Fixed rare server-side deadlock when sending disk activity update packets.
 
@@ -10,4 +11,4 @@
 
 ## List of contributors
 
-asie, ds84182, Possseidon
+asie, ds84182, Possseidon, repo-alt

src/main/scala/li/cil/oc/integration/vanilla/ConverterFluidContainerItem.scala

@@ -0,0 +1,29 @@
+package li.cil.oc.integration.vanilla
+
+import li.cil.oc.server.driver.Registry
+import li.cil.oc.{Settings, api}
+import net.minecraft.item.ItemStack
+import net.minecraftforge.fluids.IFluidContainerItem
+
+import java.util
+import scala.collection.convert.WrapAsScala._
+
+object ConverterFluidContainerItem extends api.driver.Converter {
+  override def convert(value: scala.Any, output: util.Map[AnyRef, AnyRef]) =
+    value match {
+      case stack: ItemStack => stack.getItem match {
+        case fc: IFluidContainerItem =>
+          output += "capacity" -> Int.box(fc.getCapacity(stack))
+          val fluidStack = fc.getFluid(stack)
+          if (fluidStack != null) {
+            output += "fluid" -> Registry.convert(Array[AnyRef](fluidStack))(0)
+          } else {
+            val fluidMap = new util.HashMap[AnyRef, AnyRef]()
+            fluidMap += "amount" -> Int.box(0)
+            output += "fluid" -> fluidMap
+          }
+        case _ =>
+      }
+      case _ =>
+    }
+}

src/main/scala/li/cil/oc/integration/vanilla/ModVanilla.scala

@@ -43,6 +43,7 @@ object ModVanilla extends ModProxy with RedstoneProvider {
       Driver.add(DriverCommandBlock)
     }
 
+    Driver.add(ConverterFluidContainerItem)
     Driver.add(ConverterFluidStack)
     Driver.add(ConverterFluidTankInfo)
     Driver.add(ConverterItemStack)