Survival array and mirror.

build.gradle

@@ -11,7 +11,7 @@ apply plugin: 'net.minecraftforge.gradle.forge'
 //Only edit below this line, the above code adds and enables the necessary things for Forge to be setup.
 
 
-version = "0.1.1"
+version = "0.1.3"
 group = "nl.requios.effortlessbuilding" // http://maven.apache.org/guides/mini/guide-naming-conventions.html
 archivesBaseName = "effortlessbuilding"
 

src/main/java/nl/requios/effortlessbuilding/Array.java

@@ -1,10 +1,17 @@
 package nl.requios.effortlessbuilding;
 
+import net.minecraft.block.Block;
+import net.minecraft.block.state.IBlockState;
+import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.item.ItemStack;
+import net.minecraft.util.EnumFacing;
 import net.minecraft.util.EnumHand;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.math.Vec3i;
-import net.minecraftforge.common.util.BlockSnapshot;
+import net.minecraft.world.World;
 import net.minecraftforge.event.world.BlockEvent;
+import net.minecraftforge.items.IItemHandler;
+import nl.requios.effortlessbuilding.item.ItemRandomizerBag;
 
 public class Array {
     //TODO config file
@@ -37,17 +44,46 @@ public class Array {
 
         BlockPos pos = event.getPos();
         Vec3i offset = new Vec3i(a.offset.getX(), a.offset.getY(), a.offset.getZ());
+
+        //Randomizer bag synergy
+        IItemHandler bagInventory = null;
+        if (event.getPlayer().getHeldItemMainhand().getItem() instanceof ItemRandomizerBag) {
+            bagInventory = ItemRandomizerBag.getBagInventory(event.getPlayer().getHeldItemMainhand());
+        }
+
+        //Get itemstack
+        ItemStack itemStack = event.getPlayer().getHeldItem(event.getHand());
+
         for (int i = 0; i < a.count; i++) {
             pos = pos.add(offset);
             if (event.getWorld().isBlockLoaded(pos, true)) {
-                event.getWorld().setBlockState(pos, event.getPlacedBlock());
+                if (itemStack.isEmpty()) break;
 
-                //Mirror synergy
+                //Check if held block = placed block (otherwise its a bag or wand)
-                BlockSnapshot blockSnapshot = new BlockSnapshot(event.getWorld(), pos, event.getPlacedBlock());
+                if (!event.getPlayer().isCreative() && Block.getBlockFromItem(itemStack.getItem()) == event.getPlacedBlock().getBlock()) {
-                BlockEvent.PlaceEvent placeEvent = new BlockEvent.PlaceEvent(blockSnapshot, event.getPlacedBlock(), event.getPlayer(), EnumHand.MAIN_HAND);
+                    itemStack.shrink(1);
-                Mirror.onBlockPlaced(placeEvent);
+                }
+
+                //Randomizer bag synergy
+                IBlockState blockState = bagInventory == null ? event.getPlacedBlock() :
+                        getBlockStateFromRandomizerBag(bagInventory, event.getWorld(), event.getPlayer(), event.getPos());
+
+                //TODO check if can place (ItemBlock) and if can break replaced
+
+                //Drop existing block
+                SurvivalHelper.dropBlock(event.getWorld(), pos, event.getPlayer());
+
+                event.getWorld().setBlockState(pos, blockState);
             }
         }
+        //EffortlessBuilding.log(event.getPlayer(), String.valueOf(event.getPlayer().getHeldItem(event.getHand()).getCount()));
+    }
+
+    private static IBlockState getBlockStateFromRandomizerBag(IItemHandler bagInventory, World world, EntityPlayer player, BlockPos pos) {
+        int randomSlot = ItemRandomizerBag.pickRandomSlot(bagInventory);
+        ItemStack stack = bagInventory.getStackInSlot(randomSlot);
+        //TODO get facing from getPlacedAgainst and getPlacedBlock
+        return Block.getBlockFromItem(stack.getItem()).getStateForPlacement(world, pos, EnumFacing.NORTH, 0, 0, 0, stack.getMetadata(), player, EnumHand.MAIN_HAND);
     }
 
     //Called from EventHandler
@@ -65,18 +101,13 @@ public class Array {
         for (int i = 0; i < a.count; i++) {
             pos = pos.add(offset);
             if (event.getWorld().isBlockLoaded(pos, false)) {
-                event.getWorld().setBlockToAir(pos);
+                //TODO check if can break
 
-                //Mirror synergy
+                //Drop existing block
-                BlockEvent.BreakEvent breakEvent = new BlockEvent.BreakEvent(event.getWorld(), pos, event.getState(), event.getPlayer());
+                SurvivalHelper.dropBlock(event.getWorld(), pos, event.getPlayer());
-                Mirror.onBlockBroken(breakEvent);
+
+                event.getWorld().setBlockToAir(pos);
             }
         }
     }
-
-//    @SubscribeEvent
-//    @SideOnly(Side.CLIENT)
-//    public static void onRender(RenderWorldLastEvent event) {
-//
-//    }
 }

src/main/java/nl/requios/effortlessbuilding/EffortlessBuilding.java

@@ -16,7 +16,7 @@ import net.minecraftforge.fml.common.network.NetworkRegistry;
 import net.minecraftforge.fml.common.network.simpleimpl.SimpleNetworkWrapper;
 import net.minecraftforge.fml.relauncher.Side;
 import nl.requios.effortlessbuilding.capability.*;
-import nl.requios.effortlessbuilding.inventory.RandomizerGuiHandler;
+import nl.requios.effortlessbuilding.gui.RandomizerBagGuiHandler;
 import nl.requios.effortlessbuilding.item.ItemRandomizerBag;
 import nl.requios.effortlessbuilding.network.BuildSettingsMessage;
 import nl.requios.effortlessbuilding.network.QuickReplaceMessage;
@@ -29,7 +29,7 @@ public class EffortlessBuilding
 {
     public static final String MODID = "effortlessbuilding";
     public static final String NAME = "Effortless Building";
-    public static final String VERSION = "0.1.2";
+    public static final String VERSION = "0.1.3";
 
     @Mod.Instance(EffortlessBuilding.MODID)
     public static EffortlessBuilding instance;
@@ -44,11 +44,13 @@ public class EffortlessBuilding
 
     public static final SimpleNetworkWrapper packetHandler = NetworkRegistry.INSTANCE.newSimpleChannel(EffortlessBuilding.MODID);
 
+    public static final ItemRandomizerBag ITEM_RANDOMIZER_BAG = new ItemRandomizerBag();
+
     public static final Block[] BLOCKS = {
     };
 
     public static final Item[] ITEMS = {
-            new ItemRandomizerBag()
+            ITEM_RANDOMIZER_BAG
     };
 
     public static final int RANDOMIZER_BAG_GUI = 0;
@@ -75,7 +77,7 @@ public class EffortlessBuilding
     // Register network handlers
     public void init(FMLInitializationEvent event)
     {
-        NetworkRegistry.INSTANCE.registerGuiHandler(EffortlessBuilding.instance, new RandomizerGuiHandler());
+        NetworkRegistry.INSTANCE.registerGuiHandler(EffortlessBuilding.instance, new RandomizerBagGuiHandler());
         proxy.init(event);
     }
 

src/main/java/nl/requios/effortlessbuilding/EventHandler.java

@@ -5,6 +5,8 @@ import net.minecraft.entity.Entity;
 import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemBlock;
+import net.minecraft.item.crafting.IRecipe;
+import net.minecraft.util.EnumHand;
 import net.minecraft.util.ResourceLocation;
 import net.minecraftforge.event.AttachCapabilitiesEvent;
 import net.minecraftforge.event.RegistryEvent;
@@ -45,15 +47,15 @@ public class EventHandler
     public static void onBlockPlaced(BlockEvent.PlaceEvent event) {
         QuickReplace.onBlockPlaced(event);
         if (event.isCanceled()) return;
-        Array.onBlockPlaced(event);
         Mirror.onBlockPlaced(event);
+        Array.onBlockPlaced(event);
     }
 
 
     @SubscribeEvent
     public static void onBlockBroken(BlockEvent.BreakEvent event) {
-        Array.onBlockBroken(event);
         Mirror.onBlockBroken(event);
+        Array.onBlockBroken(event);
     }
 
 }

src/main/java/nl/requios/effortlessbuilding/Mirror.java

@@ -1,24 +1,27 @@
 package nl.requios.effortlessbuilding;
 
-import net.minecraft.block.BlockDirectional;
+import net.minecraft.block.*;
-import net.minecraft.block.BlockDispenser;
-import net.minecraft.block.BlockStairs;
 import net.minecraft.block.state.IBlockState;
 import net.minecraft.client.Minecraft;
-import net.minecraft.client.entity.EntityPlayerSP;
 import net.minecraft.client.renderer.BufferBuilder;
 import net.minecraft.client.renderer.Tessellator;
 import net.minecraft.client.renderer.vertex.DefaultVertexFormats;
+import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.item.ItemStack;
 import net.minecraft.util.EnumFacing;
+import net.minecraft.util.EnumHand;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.math.Vec3d;
 import net.minecraft.world.World;
 import net.minecraftforge.client.event.RenderWorldLastEvent;
+import net.minecraftforge.common.util.BlockSnapshot;
 import net.minecraftforge.event.world.BlockEvent;
 import net.minecraftforge.fml.common.Mod;
 import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
 import net.minecraftforge.fml.relauncher.Side;
 import net.minecraftforge.fml.relauncher.SideOnly;
+import net.minecraftforge.items.IItemHandler;
+import nl.requios.effortlessbuilding.item.ItemRandomizerBag;
 import org.lwjgl.opengl.GL11;
 import org.lwjgl.util.Color;
 
@@ -73,64 +76,108 @@ public class Mirror {
 
         if (oldBlockPos.getX() + 0.5 < m.position.x - m.radius || oldBlockPos.getX() + 0.5 > m.position.x + m.radius ||
                 oldBlockPos.getY() + 0.5 < m.position.y - m.radius || oldBlockPos.getY() + 0.5 > m.position.y + m.radius ||
-                oldBlockPos.getZ() + 0.5 < m.position.z - m.radius || oldBlockPos.getZ() + 0.5 > m.position.z+ m.radius)
+                oldBlockPos.getZ() + 0.5 < m.position.z - m.radius || oldBlockPos.getZ() + 0.5 > m.position.z + m.radius)
             return;
 
+        //Randomizer bag synergy
+        IItemHandler bagInventory = null;
+        if (event.getPlayer().getHeldItem(event.getHand()).getItem() == EffortlessBuilding.ITEM_RANDOMIZER_BAG) {
+            bagInventory = ItemRandomizerBag.getBagInventory(event.getPlayer().getHeldItem(EnumHand.MAIN_HAND));
+        }
+
         if (m.mirrorX) {
-            placeMirrorX(event.getWorld(), m, oldBlockPos, event.getPlacedBlock());
+            placeMirrorX(event.getWorld(), event.getPlayer(), m, event.getPos(), event.getPlacedBlock(), bagInventory);
         }
 
         if (m.mirrorY) {
-            placeMirrorY(event.getWorld(), m, oldBlockPos, event.getPlacedBlock());
+            placeMirrorY(event.getWorld(), event.getPlayer(), m, oldBlockPos, event.getPlacedBlock(), bagInventory);
         }
 
         if (m.mirrorZ) {
-            placeMirrorZ(event.getWorld(), m, oldBlockPos, event.getPlacedBlock());
+            placeMirrorZ(event.getWorld(), event.getPlayer(), m, oldBlockPos, event.getPlacedBlock(), bagInventory);
         }
     }
 
-    private static void placeMirrorX(World world, MirrorSettings m, BlockPos oldBlockPos, IBlockState oldBlockState) {
+    private static IBlockState getBlockStateFromRandomizerBag(IItemHandler bagInventory, World world, EntityPlayer player, BlockPos pos) {
+        int randomSlot = ItemRandomizerBag.pickRandomSlot(bagInventory);
+        ItemStack stack = bagInventory.getStackInSlot(randomSlot);
+        //TODO get facing from getPlacedAgainst and getPlacedBlock
+        return Block.getBlockFromItem(stack.getItem()).getStateForPlacement(world, pos, EnumFacing.NORTH, 0, 0, 0, stack.getMetadata(), player, EnumHand.MAIN_HAND);
+    }
+
+    private static void placeMirrorX(World world, EntityPlayer player, MirrorSettings m, BlockPos oldBlockPos, IBlockState oldBlockState, IItemHandler bagInventory) {
         //find mirror position
         double x = m.position.x + (m.position.x - oldBlockPos.getX() - 0.5);
         BlockPos newBlockPos = new BlockPos(x, oldBlockPos.getY(), oldBlockPos.getZ());
-        IBlockState newBlockState = oldBlockState;
+
+        //Randomizer bag synergy
+        if (bagInventory != null)
+            oldBlockState = getBlockStateFromRandomizerBag(bagInventory, world, player, oldBlockPos);
+
+        IBlockState newBlockState = oldBlockState.withMirror(net.minecraft.util.Mirror.FRONT_BACK);
         //place block
         if (world.isBlockLoaded(newBlockPos, true)) {
-            newBlockState = oldBlockState.withMirror(net.minecraft.util.Mirror.FRONT_BACK);
+            placeBlock(world, player, newBlockPos, newBlockState);
-
-            world.setBlockState(newBlockPos, newBlockState);
         }
-        if (m.mirrorY) placeMirrorY(world, m, newBlockPos, newBlockState);
+        if (m.mirrorY) placeMirrorY(world, player, m, newBlockPos, newBlockState, bagInventory);
-        if (m.mirrorZ) placeMirrorZ(world, m, newBlockPos, newBlockState);
+        if (m.mirrorZ) placeMirrorZ(world, player, m, newBlockPos, newBlockState, bagInventory);
     }
 
-    private static void placeMirrorY(World world, MirrorSettings m, BlockPos oldBlockPos, IBlockState oldBlockState) {
+    private static void placeMirrorY(World world, EntityPlayer player, MirrorSettings m, BlockPos oldBlockPos, IBlockState oldBlockState, IItemHandler bagInventory) {
         //find mirror position
         double y = m.position.y + (m.position.y - oldBlockPos.getY() - 0.5);
         BlockPos newBlockPos = new BlockPos(oldBlockPos.getX(), y, oldBlockPos.getZ());
-        IBlockState newBlockState = oldBlockState;
+
+        //Randomizer bag synergy
+        if (bagInventory != null)
+            oldBlockState = getBlockStateFromRandomizerBag(bagInventory, world, player, oldBlockPos);
+
+        IBlockState newBlockState = getVerticalMirror(oldBlockState);
         //place block
         if (world.isBlockLoaded(newBlockPos, true)) {
-            newBlockState = getVerticalMirror(oldBlockState);
+            placeBlock(world, player, newBlockPos, newBlockState);
-
-            world.setBlockState(newBlockPos, newBlockState);
         }
-        if (m.mirrorZ) placeMirrorZ(world, m, newBlockPos, newBlockState);
+        if (m.mirrorZ) placeMirrorZ(world, player, m, newBlockPos, newBlockState, bagInventory);
     }
 
-    private static void placeMirrorZ(World world, MirrorSettings m, BlockPos oldBlockPos, IBlockState oldBlockState) {
+    private static void placeMirrorZ(World world, EntityPlayer player, MirrorSettings m, BlockPos oldBlockPos, IBlockState oldBlockState, IItemHandler bagInventory) {
         //find mirror position
         double z = m.position.z + (m.position.z - oldBlockPos.getZ() - 0.5);
         BlockPos newBlockPos = new BlockPos(oldBlockPos.getX(), oldBlockPos.getY(), z);
-        IBlockState newBlockState = oldBlockState;
+
+        //Randomizer bag synergy
+        if (bagInventory != null)
+            oldBlockState = getBlockStateFromRandomizerBag(bagInventory, world, player, oldBlockPos);
+
+        IBlockState newBlockState = oldBlockState.withMirror(net.minecraft.util.Mirror.LEFT_RIGHT);
         //place block
         if (world.isBlockLoaded(newBlockPos, true)) {
-            newBlockState = oldBlockState.withMirror(net.minecraft.util.Mirror.LEFT_RIGHT);
+            placeBlock(world, player, newBlockPos, newBlockState);
-
-            world.setBlockState(newBlockPos, newBlockState);
         }
     }
 
+    private static void placeBlock(World world, EntityPlayer player, BlockPos newBlockPos, IBlockState newBlockState) {
+        //Check itemstack
+        ItemStack itemStack = player.getHeldItem(player.swingingHand); //TODO check hand
+        if (itemStack.isEmpty()) return;
+
+        //TODO check if can place
+        //TODO check if can break
+
+        SurvivalHelper.dropBlock(world, newBlockPos, player);
+        world.setBlockState(newBlockPos, newBlockState);
+
+        //Check if held block = placed block (otherwise its a bag or wand)
+        if (!player.isCreative() && Block.getBlockFromItem(itemStack.getItem()) == newBlockState.getBlock()) {
+            itemStack.shrink(1);
+        }
+
+        //Array synergy
+        BlockSnapshot blockSnapshot = new BlockSnapshot(world, newBlockPos, newBlockState);
+        BlockEvent.PlaceEvent placeEvent = new BlockEvent.PlaceEvent(blockSnapshot, newBlockState, player, EnumHand.MAIN_HAND);
+        Array.onBlockPlaced(placeEvent);
+    }
+
     private static IBlockState getVerticalMirror(IBlockState blockState) {
         //Stairs
         if (blockState.getBlock() instanceof BlockStairs) {
@@ -141,6 +188,16 @@ public class Mirror {
             }
         }
 
+        //Slabs
+        if (blockState.getBlock() instanceof BlockSlab) {
+            if (((BlockSlab) blockState.getBlock()).isDouble()) return blockState;
+            if (blockState.getValue(BlockSlab.HALF) == BlockSlab.EnumBlockHalf.BOTTOM) {
+                return blockState.withProperty(BlockSlab.HALF, BlockSlab.EnumBlockHalf.TOP);
+            } else {
+                return blockState.withProperty(BlockSlab.HALF, BlockSlab.EnumBlockHalf.BOTTOM);
+            }
+        }
+
         //Buttons, endrod, observer, piston
         if (blockState.getBlock() instanceof BlockDirectional) {
             if (blockState.getValue(BlockDirectional.FACING) == EnumFacing.DOWN) {
@@ -177,7 +234,7 @@ public class Mirror {
 
         if (oldBlockPos.getX() + 0.5 < m.position.x - m.radius || oldBlockPos.getX() + 0.5 > m.position.x + m.radius ||
                 oldBlockPos.getY() + 0.5 < m.position.y - m.radius || oldBlockPos.getY() + 0.5 > m.position.y + m.radius ||
-                oldBlockPos.getZ() + 0.5 < m.position.z - m.radius || oldBlockPos.getZ() + 0.5 > m.position.z+ m.radius)
+                oldBlockPos.getZ() + 0.5 < m.position.z - m.radius || oldBlockPos.getZ() + 0.5 > m.position.z + m.radius)
             return;
 
         if (m.mirrorX) {
@@ -199,7 +256,7 @@ public class Mirror {
         BlockPos newBlockPos = new BlockPos(x, oldBlockPos.getY(), oldBlockPos.getZ());
         //break block
         if (event.getWorld().isBlockLoaded(newBlockPos, true)) {
-            event.getWorld().setBlockToAir(newBlockPos);
+            breakBlock(event, newBlockPos);
         }
         if (m.mirrorY) breakMirrorY(event, m, newBlockPos);
         if (m.mirrorZ) breakMirrorZ(event, m, newBlockPos);
@@ -211,7 +268,7 @@ public class Mirror {
         BlockPos newBlockPos = new BlockPos(oldBlockPos.getX(), y, oldBlockPos.getZ());
         //place block
         if (event.getWorld().isBlockLoaded(newBlockPos, true)) {
-            event.getWorld().setBlockToAir(newBlockPos);
+            breakBlock(event, newBlockPos);
         }
         if (m.mirrorZ) breakMirrorZ(event, m, newBlockPos);
     }
@@ -222,14 +279,25 @@ public class Mirror {
         BlockPos newBlockPos = new BlockPos(oldBlockPos.getX(), oldBlockPos.getY(), z);
         //place block
         if (event.getWorld().isBlockLoaded(newBlockPos, true)) {
-            event.getWorld().setBlockToAir(newBlockPos);
+            breakBlock(event, newBlockPos);
         }
     }
 
+    private static void breakBlock(BlockEvent.BreakEvent event, BlockPos newBlockPos) {
+        //TODO check if can break
+
+        SurvivalHelper.dropBlock(event.getWorld(), newBlockPos, event.getPlayer());
+        event.getWorld().setBlockToAir(newBlockPos);
+
+        //Array synergy
+        BlockEvent.BreakEvent breakEvent = new BlockEvent.BreakEvent(event.getWorld(), newBlockPos, event.getState(), event.getPlayer());
+        Array.onBlockBroken(breakEvent);
+    }
+
     @SubscribeEvent
     @SideOnly(Side.CLIENT)
     public static void onRender(RenderWorldLastEvent event) {
-        EntityPlayerSP player = Minecraft.getMinecraft().player;
+        EntityPlayer player = Minecraft.getMinecraft().player;
         BuildSettingsManager.BuildSettings buildSettings = BuildSettingsManager.getBuildSettings(player);
         if (buildSettings == null) return;
         MirrorSettings m = buildSettings.getMirrorSettings();

src/main/java/nl/requios/effortlessbuilding/QuickReplace.java

@@ -1,8 +1,10 @@
 package nl.requios.effortlessbuilding;
 
+import net.minecraft.block.Block;
 import net.minecraft.block.state.IBlockState;
 import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.entity.player.EntityPlayerMP;
+import net.minecraft.item.ItemStack;
 import net.minecraft.util.EnumHand;
 import net.minecraft.util.math.BlockPos;
 import net.minecraftforge.common.util.BlockSnapshot;
@@ -48,14 +50,27 @@ public class QuickReplace {
         if (!message.isBlockHit() || message.getBlockPos() == null) return;
 
         BlockPos placedAgainstBlockPos = message.getBlockPos();
-        //placedAgainstBlockPos = placedAgainstBlockPos.down();
+
+        //Get under tall grass and other replaceable blocks
+        if (player.world.getBlockState(placedAgainstBlockPos).getBlock().isReplaceable(player.world, placedAgainstBlockPos)) {
+            placedAgainstBlockPos = placedAgainstBlockPos.down();
+        }
+
         IBlockState blockState = blockStates.get(player.getUniqueID());
+
+        SurvivalHelper.dropBlock(player.world, placedAgainstBlockPos, player);
         player.world.setBlockState(placedAgainstBlockPos, blockState);
 
+        //Shrink itemstack with 1
+        ItemStack itemStack = player.getHeldItem(player.swingingHand); //TODO check hand
+        if (!player.isCreative() && Block.getBlockFromItem(itemStack.getItem()) == blockState.getBlock()) {
+            itemStack.shrink(1);
+        }
+
         //Mirror and Array synergy
         BlockSnapshot blockSnapshot = new BlockSnapshot(player.world, placedAgainstBlockPos, blockState);
         BlockEvent.PlaceEvent placeEvent = new BlockEvent.PlaceEvent(blockSnapshot, blockState, player, EnumHand.MAIN_HAND);
-        Array.onBlockPlaced(placeEvent);
         Mirror.onBlockPlaced(placeEvent);
+        Array.onBlockPlaced(placeEvent);
     }
 }

src/main/java/nl/requios/effortlessbuilding/SurvivalHelper.java

@@ -0,0 +1,35 @@
+package nl.requios.effortlessbuilding;
+
+import net.minecraft.block.Block;
+import net.minecraft.block.state.IBlockState;
+import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.item.ItemStack;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.World;
+import net.minecraftforge.items.ItemHandlerHelper;
+
+import java.util.List;
+
+public class SurvivalHelper {
+
+    public static boolean canBreak(){
+        return true;
+    }
+
+    public static boolean canPlace(){
+        return true;
+    }
+
+    //Gives items directly to player
+    public static void dropBlock(World world, BlockPos pos, EntityPlayer player){
+        if (player.isCreative()) return;
+
+        IBlockState blockState = world.getBlockState(pos);
+
+        List<ItemStack> drops = blockState.getBlock().getDrops(world, pos, blockState, 0);
+        for (ItemStack drop : drops)
+        {
+            ItemHandlerHelper.giveItemToPlayer(player, drop);
+        }
+    }
+}

src/main/java/nl/requios/effortlessbuilding/capability/ItemHandlerCapabilityProvider.java

@@ -0,0 +1,42 @@
+package nl.requios.effortlessbuilding.capability;
+
+import net.minecraft.nbt.NBTTagCompound;
+import net.minecraft.util.EnumFacing;
+import net.minecraftforge.common.capabilities.Capability;
+import net.minecraftforge.common.capabilities.ICapabilitySerializable;
+import net.minecraftforge.items.CapabilityItemHandler;
+import net.minecraftforge.items.IItemHandler;
+import net.minecraftforge.items.ItemStackHandler;
+import nl.requios.effortlessbuilding.item.ItemRandomizerBag;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+
+public class ItemHandlerCapabilityProvider implements ICapabilitySerializable<NBTTagCompound> {
+    IItemHandler itemHandler = new ItemStackHandler(ItemRandomizerBag.INV_SIZE);
+
+    @Override
+    public boolean hasCapability(@Nonnull Capability<?> capability, @Nullable EnumFacing facing) {
+        if (capability == CapabilityItemHandler.ITEM_HANDLER_CAPABILITY)
+            return true;
+        return false;
+    }
+
+    @Nullable
+    @Override
+    public <T> T getCapability(@Nonnull Capability<T> capability, @Nullable EnumFacing facing) {
+        if (capability == CapabilityItemHandler.ITEM_HANDLER_CAPABILITY)
+            return (T) itemHandler;
+        return null;
+    }
+
+    @Override
+    public NBTTagCompound serializeNBT() {
+        return ((ItemStackHandler) itemHandler).serializeNBT();
+    }
+
+    @Override
+    public void deserializeNBT(NBTTagCompound nbt) {
+        ((ItemStackHandler) itemHandler).deserializeNBT(nbt);
+    }
+}

src/main/java/nl/requios/effortlessbuilding/gui/RandomizerBagContainer.java

@@ -0,0 +1,110 @@
+package nl.requios.effortlessbuilding.gui;
+
+import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.entity.player.InventoryPlayer;
+import net.minecraft.inventory.ClickType;
+import net.minecraft.inventory.Container;
+import net.minecraft.inventory.IInventory;
+import net.minecraft.inventory.Slot;
+import net.minecraft.item.ItemStack;
+import net.minecraft.util.EnumHand;
+import net.minecraftforge.items.IItemHandler;
+import net.minecraftforge.items.SlotItemHandler;
+import nl.requios.effortlessbuilding.item.ItemRandomizerBag;
+
+public class RandomizerBagContainer extends Container {
+
+    private final IItemHandler bagInventory;
+    private final int sizeInventory;
+
+    private static final int INV_START = ItemRandomizerBag.INV_SIZE, INV_END = INV_START + 26,
+            HOTBAR_START = INV_END + 1, HOTBAR_END = HOTBAR_START + 8;
+
+    public RandomizerBagContainer(InventoryPlayer parInventoryPlayer, IItemHandler parIInventory) {
+        bagInventory = parIInventory;
+        sizeInventory = bagInventory.getSlots();
+        for (int i = 0; i < sizeInventory; ++i) {
+            this.addSlotToContainer(new SlotItemHandler(bagInventory, i, 44 + (18 * i), 20));
+        }
+
+        // add player inventory slots
+        int i;
+        for (i = 0; i < 3; ++i) {
+            for (int j = 0; j < 9; ++j) {
+                addSlotToContainer(new Slot(parInventoryPlayer, j + i * 9 + 9, 8 + j * 18, 51 + i * 18));
+            }
+        }
+
+        // add hotbar slots
+        for (i = 0; i < 9; ++i) {
+            addSlotToContainer(new Slot(parInventoryPlayer, i, 8 + i * 18, 109));
+        }
+    }
+
+    @Override
+    public boolean canInteractWith(EntityPlayer playerIn) {
+        return true;
+    }
+
+    @Override
+    public ItemStack transferStackInSlot(EntityPlayer playerIn, int slotIndex) {
+        ItemStack itemstack = null;
+        Slot slot = this.inventorySlots.get(slotIndex);
+
+        if (slot != null && slot.getHasStack()) {
+            ItemStack itemstack1 = slot.getStack();
+            itemstack = itemstack1.copy();
+
+            // If item is in our custom inventory
+            if (slotIndex < INV_START) {
+                // try to place in player inventory / action bar
+                if (!this.mergeItemStack(itemstack1, INV_START, HOTBAR_END + 1, true)) {
+                    return null;
+                }
+
+                slot.onSlotChange(itemstack1, itemstack);
+            }
+            // Item is in inventory / hotbar, try to place in custom inventory or armor slots
+            else {
+                /**
+                 * Implementation number 1: Shift-click into your custom inventory
+                 */
+                if (slotIndex >= INV_START) {
+                    // place in custom inventory
+                    if (!this.mergeItemStack(itemstack1, 0, INV_START, false)) {
+                        return null;
+                    }
+                }
+
+            }
+
+            if (itemstack1.getCount() == 0) {
+                slot.putStack(ItemStack.EMPTY);
+            } else {
+                slot.onSlotChanged();
+            }
+
+            if (itemstack1.getCount() == itemstack.getCount()) {
+                return null;
+            }
+
+            slot.onTake(playerIn, itemstack1);
+        }
+
+        return itemstack;
+    }
+
+    /**
+     * You should override this method to prevent the player from moving the stack that
+     * opened the inventory, otherwise if the player moves it, the inventory will not
+     * be able to save properly
+     */
+    @Override
+    public ItemStack slotClick(int slot, int dragType, ClickType clickTypeIn, EntityPlayer player) {
+        // this will prevent the player from interacting with the item that opened the inventory:
+        if (slot >= 0 && getSlot(slot) != null && getSlot(slot).getStack() == player.getHeldItem(EnumHand.MAIN_HAND)) {
+            return null;
+        }
+        return super.slotClick(slot, dragType, clickTypeIn, player);
+    }
+}

src/main/java/nl/requios/effortlessbuilding/gui/RandomizerBagGuiContainer.java

@@ -0,0 +1,49 @@
+package nl.requios.effortlessbuilding.gui;
+
+import net.minecraft.client.gui.inventory.GuiContainer;
+import net.minecraft.client.renderer.GlStateManager;
+import net.minecraft.entity.player.InventoryPlayer;
+import net.minecraft.util.ResourceLocation;
+import net.minecraftforge.fml.relauncher.Side;
+import net.minecraftforge.fml.relauncher.SideOnly;
+import net.minecraftforge.items.IItemHandler;
+import nl.requios.effortlessbuilding.EffortlessBuilding;
+
+@SideOnly(Side.CLIENT)
+public class RandomizerBagGuiContainer extends GuiContainer {
+    private static final ResourceLocation guiTextures =
+            new ResourceLocation(EffortlessBuilding.MODID + ":textures/gui/container/randomizerbag.png");
+    private final InventoryPlayer inventoryPlayer;
+    private final IItemHandler inventoryBag;
+
+    public RandomizerBagGuiContainer(InventoryPlayer inventoryPlayer, IItemHandler inventoryBag) {
+        super(new RandomizerBagContainer(inventoryPlayer, inventoryBag));
+        this.inventoryPlayer = inventoryPlayer;
+        this.inventoryBag = inventoryBag;
+
+        ySize = 134;
+    }
+
+    @Override
+    public void drawScreen(int mouseX, int mouseY, float partialTicks) {
+        drawDefaultBackground();
+        super.drawScreen(mouseX, mouseY, partialTicks);
+        this.renderHoveredToolTip(mouseX, mouseY);
+    }
+
+    @Override
+    protected void drawGuiContainerForegroundLayer(int mouseX, int mouseY) {
+        String s = "Randomizer Bag";
+        fontRenderer.drawString(s, 8, 6, 0x404040);
+        fontRenderer.drawString(inventoryPlayer.getDisplayName().getUnformattedText(), 8, ySize - 96 + 2, 0x404040);
+    }
+
+    @Override
+    protected void drawGuiContainerBackgroundLayer(float partialTicks, int mouseX, int mouseY) {
+        GlStateManager.color(1.0F, 1.0F, 1.0F, 1.0F);
+        mc.getTextureManager().bindTexture(guiTextures);
+        int marginHorizontal = (width - xSize) / 2;
+        int marginVertical = (height - ySize) / 2;
+        drawTexturedModalRect(marginHorizontal, marginVertical, 0, 0, xSize, ySize);
+    }
+}

src/main/java/nl/requios/effortlessbuilding/gui/RandomizerBagGuiHandler.java

@@ -0,0 +1,37 @@
+package nl.requios.effortlessbuilding.gui;
+
+import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.util.EnumHand;
+import net.minecraft.world.World;
+import net.minecraftforge.fml.common.network.IGuiHandler;
+import net.minecraftforge.fml.relauncher.Side;
+import net.minecraftforge.fml.relauncher.SideOnly;
+import net.minecraftforge.items.CapabilityItemHandler;
+import nl.requios.effortlessbuilding.EffortlessBuilding;
+
+import javax.annotation.Nullable;
+
+public class RandomizerBagGuiHandler implements IGuiHandler {
+    @Nullable
+    @Override
+    public Object getServerGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z) {
+        if (ID == EffortlessBuilding.RANDOMIZER_BAG_GUI) {
+            // Use the player's held item to create the container
+            return new RandomizerBagContainer(player.inventory,
+                    player.getHeldItem(EnumHand.MAIN_HAND).getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, null));
+        }
+        return null;
+    }
+
+    @Nullable
+    @Override
+    @SideOnly(Side.CLIENT)
+    public Object getClientGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z) {
+        if (ID == EffortlessBuilding.RANDOMIZER_BAG_GUI) {
+            // Use the player's held item to create the client-side gui container
+            return new RandomizerBagGuiContainer(player.inventory,
+                    player.getHeldItem(EnumHand.MAIN_HAND).getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, null));
+        }
+        return null;
+    }
+}

src/main/java/nl/requios/effortlessbuilding/inventory/RandomizerBagContainer.java

@@ -1,11 +0,0 @@
-package nl.requios.effortlessbuilding.inventory;
-
-import net.minecraft.entity.player.EntityPlayer;
-import net.minecraft.inventory.Container;
-
-public class RandomizerBagContainer extends Container {
-    @Override
-    public boolean canInteractWith(EntityPlayer playerIn) {
-        return false;
-    }
-}

src/main/java/nl/requios/effortlessbuilding/inventory/RandomizerBagGuiContainer.java

@@ -1,15 +0,0 @@
-package nl.requios.effortlessbuilding.inventory;
-
-import net.minecraft.client.gui.inventory.GuiContainer;
-import net.minecraft.inventory.Container;
-
-public class RandomizerBagGuiContainer extends GuiContainer {
-    public RandomizerBagGuiContainer(Container inventorySlotsIn) {
-        super(inventorySlotsIn);
-    }
-
-    @Override
-    protected void drawGuiContainerBackgroundLayer(float partialTicks, int mouseX, int mouseY) {
-
-    }
-}

src/main/java/nl/requios/effortlessbuilding/inventory/RandomizerBagInventory.java

@@ -1,144 +0,0 @@
-package nl.requios.effortlessbuilding.inventory;
-
-import net.minecraft.item.ItemStack;
-import net.minecraft.nbt.NBTTagCompound;
-import net.minecraft.nbt.NBTTagList;
-import net.minecraftforge.items.IItemHandler;
-
-import javax.annotation.Nonnull;
-
-public class RandomizerBagInventory implements IItemHandler {
-
-    //Reference to NBT data
-    private final ItemStack invItem;
-
-    public static final int INV_SIZE = 5;
-
-    private ItemStack[] inventory = new ItemStack[INV_SIZE];
-
-    public RandomizerBagInventory(ItemStack invItem) {
-        this.invItem = invItem;
-
-        if (!invItem.hasTagCompound()) {
-            invItem.setTagCompound(new NBTTagCompound());
-        }
-
-        readFromNBT(invItem.getTagCompound());
-    }
-
-    @Override
-    public int getSlots() {
-        return INV_SIZE;
-    }
-
-    @Nonnull
-    @Override
-    public ItemStack getStackInSlot(int slot) {
-        return inventory[slot];
-    }
-
-    @Nonnull
-    @Override
-    public ItemStack insertItem(int slot, @Nonnull ItemStack stack, boolean simulate) {
-        ItemStack slotStack = getStackInSlot(slot);
-        if (slotStack.getCount() == 0) {
-            setInventorySlotContents(slot, stack);
-            return null;
-        }
-        if (getSlotLimit(slot) - slotStack.getCount() < stack.getCount()) {
-            //Not enough place remaining, split stack
-            slotStack.setCount(getSlotLimit(slot));
-            onInventoryChanged();
-            stack.copy().shrink(getSlotLimit(slot) - slotStack.getCount());
-            //TODO make proper
-            return stack;
-        } else {
-            slotStack.grow(stack.getCount());
-            onInventoryChanged();
-            return null;
-        }
-    }
-
-    @Nonnull
-    @Override
-    public ItemStack extractItem(int slot, int amount, boolean simulate) {
-        ItemStack stack = getStackInSlot(slot);
-        if (stack == null) return stack;
-
-        if (stack.getCount() > amount) {
-            stack = stack.splitStack(amount);
-            onInventoryChanged();
-        } else {
-            setInventorySlotContents(slot, null);
-        }
-        return stack;
-    }
-
-    @Override
-    public int getSlotLimit(int slot) {
-        return 64;
-    }
-
-    public void onInventoryChanged() {
-        for (int i = 0; i < getSlotLimit(0); ++i) {
-            if (getStackInSlot(i) != null && getStackInSlot(i).getCount() == 0) {
-                inventory[i] = null;
-            }
-        }
-
-        writeToNBT(invItem.getTagCompound());
-    }
-
-    public void setInventorySlotContents(int slot, ItemStack stack) {
-        inventory[slot] = stack;
-
-        if (stack != null && stack.getCount() > getSlotLimit(slot)) {
-            stack.setCount(getSlotLimit(slot));
-        }
-
-        // Don't forget this line or your inventory will not be saved!
-        onInventoryChanged();
-    }
-
-    public void readFromNBT(NBTTagCompound compound) {
-        // Gets the custom taglist we wrote to this compound, if any
-        // 1.7.2+ change to compound.getTagList("ItemInventory", Constants.NBT.TAG_COMPOUND);
-        NBTTagList items = compound.getTagList("ItemInventory", 0);
-
-        for (int i = 0; i < items.tagCount(); ++i) {
-            // 1.7.2+ change to items.getCompoundTagAt(i)
-            NBTTagCompound item = items.getCompoundTagAt(i);
-            int slot = item.getInteger("Slot");
-
-            // Just double-checking that the saved slot index is within our inventory array bounds
-            if (slot >= 0 && slot < getSlots()) {
-                inventory[slot] = new ItemStack(item);
-            }
-        }
-    }
-
-    /**
-     * A custom method to write our inventory to an ItemStack's NBT compound
-     */
-    public void writeToNBT(NBTTagCompound tagcompound) {
-        // Create a new NBT Tag List to store itemstacks as NBT Tags
-        NBTTagList items = new NBTTagList();
-
-        for (int i = 0; i < getSlots(); ++i) {
-            // Only write stacks that contain items
-            if (getStackInSlot(i) != null) {
-                // Make a new NBT Tag Compound to write the itemstack and slot index to
-                NBTTagCompound item = new NBTTagCompound();
-                item.setInteger("Slot", i);
-                // Writes the itemstack in slot(i) to the Tag Compound we just made
-                getStackInSlot(i).writeToNBT(item);
-
-                // add the tag compound to our tag list
-                items.appendTag(item);
-            }
-        }
-        // Add the TagList to the ItemStack's Tag Compound with the name "ItemInventory"
-        tagcompound.setTag("ItemInventory", items);
-    }
-
-}

src/main/java/nl/requios/effortlessbuilding/inventory/RandomizerGuiHandler.java

@@ -1,32 +0,0 @@
-package nl.requios.effortlessbuilding.inventory;
-
-import net.minecraft.entity.player.EntityPlayer;
-import net.minecraft.world.World;
-import net.minecraftforge.fml.common.network.IGuiHandler;
-import nl.requios.effortlessbuilding.EffortlessBuilding;
-import nl.requios.effortlessbuilding.inventory.RandomizerBagContainer;
-
-import javax.annotation.Nullable;
-
-public class RandomizerGuiHandler implements IGuiHandler {
-    @Nullable
-    @Override
-    public Object getServerGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z) {
-        if (ID == EffortlessBuilding.RANDOMIZER_BAG_GUI) {
-            // Use the player's held item to create the inventory
-            return new RandomizerBagContainer();
-        }
-        return null;
-    }
-
-    @Nullable
-    @Override
-    public Object getClientGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z) {
-        if (ID == EffortlessBuilding.RANDOMIZER_BAG_GUI) {
-            // We have to cast the new container as our custom class
-            // and pass in currently held item for the inventory
-            return new RandomizerBagGuiContainer(new RandomizerBagContainer());
-        }
-        return null;
-    }
-}

src/main/java/nl/requios/effortlessbuilding/item/ItemRandomizerBag.java

@@ -1,20 +1,41 @@
 package nl.requios.effortlessbuilding.item;
 
+import net.minecraft.block.Block;
+import net.minecraft.block.state.IBlockState;
+import net.minecraft.client.util.ITooltipFlag;
 import net.minecraft.creativetab.CreativeTabs;
 import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
+import net.minecraft.nbt.NBTTagCompound;
 import net.minecraft.util.ActionResult;
 import net.minecraft.util.EnumActionResult;
 import net.minecraft.util.EnumFacing;
 import net.minecraft.util.EnumHand;
 import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.text.TextFormatting;
 import net.minecraft.world.World;
+import net.minecraftforge.common.capabilities.ICapabilityProvider;
+import net.minecraftforge.common.util.BlockSnapshot;
+import net.minecraftforge.event.world.BlockEvent;
+import net.minecraftforge.items.CapabilityItemHandler;
+import net.minecraftforge.items.IItemHandler;
+import nl.requios.effortlessbuilding.Array;
 import nl.requios.effortlessbuilding.EffortlessBuilding;
+import nl.requios.effortlessbuilding.Mirror;
+import nl.requios.effortlessbuilding.capability.ItemHandlerCapabilityProvider;
+
+import javax.annotation.Nullable;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
 
 public class ItemRandomizerBag extends Item {
+    public static final int INV_SIZE = 5;
 
-    public ItemRandomizerBag(){
+    private static Random rand = new Random(1337);
+
+    public ItemRandomizerBag() {
         this.setRegistryName(EffortlessBuilding.MODID, "randomizer_bag");
         this.setUnlocalizedName(this.getRegistryName().toString());
 
@@ -23,34 +44,132 @@ public class ItemRandomizerBag extends Item {
     }
 
     @Override
-    public EnumActionResult onItemUse(EntityPlayer player, World worldIn, BlockPos pos, EnumHand hand, EnumFacing facing, float hitX, float hitY, float hitZ) {
+    public EnumActionResult onItemUse(EntityPlayer player, World world, BlockPos pos, EnumHand hand, EnumFacing facing, float hitX, float hitY, float hitZ) {
 
-        if (worldIn.isRemote) return EnumActionResult.PASS;
+        if (player.isSneaking()) {
-        EffortlessBuilding.log(player, "onItemUse");
+            if (world.isRemote) return EnumActionResult.SUCCESS;
-
-        if (player.isSneaking()){
             //Open inventory
-            player.openGui(EffortlessBuilding.instance, EffortlessBuilding.RANDOMIZER_BAG_GUI, worldIn, 0, 0, 0);
+            player.openGui(EffortlessBuilding.instance, EffortlessBuilding.RANDOMIZER_BAG_GUI, world, 0, 0, 0);
         } else {
-            //Place block
+            if (world.isRemote) return EnumActionResult.SUCCESS;
+            //Use item
+            //Get bag inventory
+            ItemStack bag = player.getHeldItem(hand);
+            IItemHandler bagInventory = getBagInventory(bag);
+            if (bagInventory == null)
+                return EnumActionResult.FAIL;
 
+            int randomSlot = pickRandomSlot(bagInventory);
+            if (randomSlot < 0 || randomSlot > bagInventory.getSlots()) return EnumActionResult.FAIL;
+
+            ItemStack toPlace = bagInventory.getStackInSlot(randomSlot);
+
+            if (toPlace.isEmpty()) return EnumActionResult.FAIL;
+
+            //Previously: use onItemUse to place block (no synergy)
+            //bag.setItemDamage(toPlace.getMetadata());
+            //toPlace.onItemUse(player, world, pos, hand, facing, hitX, hitY, hitZ);
+
+            if (!world.getBlockState(pos).getBlock().isReplaceable(world, pos)) {
+                pos = pos.offset(facing);
+            }
+
+            IBlockState blockState = Block.getBlockFromItem(toPlace.getItem()).getStateForPlacement(world, pos, facing,
+                    hitX, hitY, hitZ, toPlace.getMetadata(), player, hand);
+            world.setBlockState(pos, blockState);
+
+            //Synergy
+            BlockSnapshot blockSnapshot = new BlockSnapshot(player.world, pos, blockState);
+            BlockEvent.PlaceEvent placeEvent = new BlockEvent.PlaceEvent(blockSnapshot, blockState, player, hand);
+            Mirror.onBlockPlaced(placeEvent);
+            Array.onBlockPlaced(placeEvent);
         }
-        return EnumActionResult.PASS;
+        return EnumActionResult.SUCCESS;
     }
 
     @Override
-    public ActionResult<ItemStack> onItemRightClick(World worldIn, EntityPlayer playerIn, EnumHand handIn) {
+    public ActionResult<ItemStack> onItemRightClick(World world, EntityPlayer player, EnumHand hand) {
-        if (worldIn.isRemote) return new ActionResult<>(EnumActionResult.PASS, playerIn.getHeldItem(handIn));
-        EffortlessBuilding.log(playerIn, "onItemRightClick");
 
-        //Open inventory
+        if (player.isSneaking()) {
-        playerIn.openGui(EffortlessBuilding.instance, EffortlessBuilding.RANDOMIZER_BAG_GUI, worldIn, 0, 0, 0);
+            if (world.isRemote) return new ActionResult<>(EnumActionResult.SUCCESS, player.getHeldItem(hand));
+            //Open inventory
+            player.openGui(EffortlessBuilding.instance, EffortlessBuilding.RANDOMIZER_BAG_GUI, world, 0, 0, 0);
+        } else {
+            //Use item
+            //Get bag inventory
+            ItemStack bag = player.getHeldItem(hand);
+            IItemHandler bagInventory = getBagInventory(bag);
+            if (bagInventory == null)
+                return new ActionResult<>(EnumActionResult.FAIL, player.getHeldItem(hand));
 
-        return new ActionResult<>(EnumActionResult.PASS, playerIn.getHeldItem(handIn));
+            int randomSlot = pickRandomSlot(bagInventory);
+            if (randomSlot < 0 || randomSlot > bagInventory.getSlots())
+                return new ActionResult<>(EnumActionResult.FAIL, player.getHeldItem(hand));
+
+            ItemStack toUse = bagInventory.getStackInSlot(randomSlot);
+            if (toUse.isEmpty()) return new ActionResult<>(EnumActionResult.FAIL, player.getHeldItem(hand));
+
+            return toUse.useItemRightClick(world, player, hand);
+        }
+        return new ActionResult<>(EnumActionResult.PASS, player.getHeldItem(hand));
+    }
+
+    /**
+     * Get the inventory of a randomizer bag by checking the capability.
+     *
+     * @param bag
+     * @return
+     */
+    public static IItemHandler getBagInventory(ItemStack bag) {
+        if (!bag.hasCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, null)) return null;
+        return bag.getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, null);
+    }
+
+    /**
+     * Pick a random slot from the bag. Empty slots will never get chosen.
+     *
+     * @param bagInventory
+     * @return
+     */
+    public static int pickRandomSlot(IItemHandler bagInventory) {
+        //Find how many stacks are non-empty, and save them in a list
+        int nonempty = 0;
+        List<ItemStack> nonEmptyStacks = new ArrayList<>(INV_SIZE);
+        List<Integer> originalSlots = new ArrayList<>(INV_SIZE);
+        for (int i = 0; i < bagInventory.getSlots(); i++) {
+            ItemStack stack = bagInventory.getStackInSlot(i);
+            if (!stack.isEmpty()) {
+                nonempty++;
+                nonEmptyStacks.add(stack);
+                originalSlots.add(i);
+            }
+        }
+
+        if (nonEmptyStacks.size() != originalSlots.size())
+            throw new Error("NonEmptyStacks and OriginalSlots not same size");
+
+        if (nonempty == 0) return -1;
+
+        //Pick random slot
+        int randomSlot = rand.nextInt(nonempty);
+
+        return originalSlots.get(randomSlot);
     }
 
     @Override
     public int getMaxItemUseDuration(ItemStack stack) {
         return 1;
     }
+
+    @Nullable
+    @Override
+    public ICapabilityProvider initCapabilities(ItemStack stack, @Nullable NBTTagCompound nbt) {
+        return new ItemHandlerCapabilityProvider();
+    }
+
+    @Override
+    public void addInformation(ItemStack stack, @Nullable World world, List<String> tooltip, ITooltipFlag flag) {
+        tooltip.add(TextFormatting.BLUE + "Rightclick" + TextFormatting.GRAY + " to place a random block");
+        tooltip.add(TextFormatting.BLUE + "Sneak + rightclick" + TextFormatting.GRAY + " to open inventory");
+    }
 }

src/main/java/nl/requios/effortlessbuilding/network/BuildSettingsMessage.java

@@ -13,6 +13,7 @@ import net.minecraftforge.fml.common.network.simpleimpl.MessageContext;
 import nl.requios.effortlessbuilding.Array;
 import nl.requios.effortlessbuilding.BuildSettingsManager;
 import nl.requios.effortlessbuilding.BuildSettingsManager.BuildSettings;
+import nl.requios.effortlessbuilding.EffortlessBuilding;
 import nl.requios.effortlessbuilding.Mirror;
 
 public class BuildSettingsMessage implements IMessage {
@@ -84,7 +85,7 @@ public class BuildSettingsMessage implements IMessage {
             //EffortlessBuilding.log("message received on " + ctx.side + " side");
 
             // This is the player the packet was sent to the server from
-            EntityPlayer player = (ctx.side.isClient() ? Minecraft.getMinecraft().player : ctx.getServerHandler().player);
+            EntityPlayer player = EffortlessBuilding.proxy.getPlayerEntityFromContext(ctx);
             // The value that was sent
             BuildSettings buildSettings = message.buildSettings;
             Mirror.MirrorSettings m = buildSettings.getMirrorSettings();
@@ -98,9 +99,9 @@ public class BuildSettingsMessage implements IMessage {
             a.count = Math.max(0, a.count);
 
             // Execute the action on the main server thread by adding it as a scheduled task
-            IThreadListener threadListener = (ctx.side.isClient() ? Minecraft.getMinecraft() : ((EntityPlayerMP) player).getServerWorld());
+            IThreadListener threadListener = EffortlessBuilding.proxy.getThreadListenerFromContext(ctx);
             threadListener.addScheduledTask(() -> {
-                EntityPlayer p = (ctx.side.isClient() ? Minecraft.getMinecraft().player : ctx.getServerHandler().player);
+                EntityPlayer p = EffortlessBuilding.proxy.getPlayerEntityFromContext(ctx);
                 BuildSettingsManager.setBuildSettings(p, buildSettings);
             });
             // No response packet

src/main/java/nl/requios/effortlessbuilding/network/QuickReplaceMessage.java

@@ -8,6 +8,7 @@ import net.minecraftforge.fml.common.network.simpleimpl.IMessage;
 import net.minecraftforge.fml.common.network.simpleimpl.IMessageHandler;
 import net.minecraftforge.fml.common.network.simpleimpl.MessageContext;
 import net.minecraftforge.fml.relauncher.Side;
+import nl.requios.effortlessbuilding.EffortlessBuilding;
 import nl.requios.effortlessbuilding.QuickReplace;
 import nl.requios.effortlessbuilding.proxy.ClientProxy;
 
@@ -77,7 +78,7 @@ public class QuickReplaceMessage implements IMessage {
 
             } else {
                 //Received serverside
-                ctx.getServerHandler().player.getServerWorld().addScheduledTask(() -> {
+                EffortlessBuilding.proxy.getThreadListenerFromContext(ctx).addScheduledTask(() -> {
                     QuickReplace.onMessageReceived(ctx.getServerHandler().player, message);
                 });
             }

src/main/java/nl/requios/effortlessbuilding/proxy/ClientProxy.java

@@ -6,7 +6,9 @@ import net.minecraft.client.entity.EntityPlayerSP;
 import net.minecraft.client.renderer.block.model.ModelResourceLocation;
 import net.minecraft.client.settings.KeyBinding;
 import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.entity.player.EntityPlayerMP;
 import net.minecraft.item.Item;
+import net.minecraft.util.IThreadListener;
 import net.minecraft.util.math.RayTraceResult;
 import net.minecraft.util.text.TextFormatting;
 import net.minecraftforge.client.event.ModelRegistryEvent;
@@ -42,8 +44,8 @@ public class ClientProxy implements IProxy {
         keyBindings = new KeyBinding[2];
 
         // instantiate the key bindings
-        keyBindings[0] = new KeyBinding("key.hud.desc", Keyboard.KEY_NUMPAD0, "key.effortlessbuilding.category");
+        keyBindings[0] = new KeyBinding("key.hud.desc", Keyboard.KEY_ADD, "key.effortlessbuilding.category");
-        keyBindings[1] = new KeyBinding("key.replace.desc", Keyboard.KEY_NUMPAD1, "key.effortlessbuilding.category");
+        keyBindings[1] = new KeyBinding("key.replace.desc", Keyboard.KEY_SUBTRACT, "key.effortlessbuilding.category");
 
         // register all the key bindings
         for (int i = 0; i < keyBindings.length; ++i) {
@@ -58,7 +60,12 @@ public class ClientProxy implements IProxy {
 
     @Override
     public EntityPlayer getPlayerEntityFromContext(MessageContext ctx) {
-        return (ctx.side.isClient() ? Minecraft.getMinecraft().player : EffortlessBuilding.proxy.getPlayerEntityFromContext(ctx));
+        return (ctx.side.isClient() ? Minecraft.getMinecraft().player : ctx.getServerHandler().player);
+    }
+
+    @Override
+    public IThreadListener getThreadListenerFromContext(MessageContext ctx) {
+        return (ctx.side.isClient() ? Minecraft.getMinecraft() : ((EntityPlayerMP) getPlayerEntityFromContext(ctx)).getServerWorld());
     }
 
     @Override

src/main/java/nl/requios/effortlessbuilding/proxy/IProxy.java

@@ -1,6 +1,7 @@
 package nl.requios.effortlessbuilding.proxy;
 
 import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.util.IThreadListener;
 import net.minecraftforge.fml.common.event.FMLInitializationEvent;
 import net.minecraftforge.fml.common.event.FMLPostInitializationEvent;
 import net.minecraftforge.fml.common.event.FMLPreInitializationEvent;
@@ -33,8 +34,10 @@ public interface IProxy
     /**
      * Returns a side-appropriate EntityPlayer for use during message handling.
      *
-     * @param parContext the context
+     * @param ctx the context
      * @return the player entity from context
      */
-    EntityPlayer getPlayerEntityFromContext(MessageContext parContext);
+    EntityPlayer getPlayerEntityFromContext(MessageContext ctx);
+
+    IThreadListener getThreadListenerFromContext(MessageContext ctx);
 }

src/main/java/nl/requios/effortlessbuilding/proxy/ServerProxy.java

@@ -1,14 +1,22 @@
 package nl.requios.effortlessbuilding.proxy;
 
+import net.minecraft.client.entity.AbstractClientPlayer;
 import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.entity.player.EntityPlayerMP;
+import net.minecraft.util.IThreadListener;
 import net.minecraftforge.fml.common.event.FMLInitializationEvent;
 import net.minecraftforge.fml.common.event.FMLPostInitializationEvent;
 import net.minecraftforge.fml.common.event.FMLPreInitializationEvent;
 import net.minecraftforge.fml.common.event.FMLServerStartingEvent;
 import net.minecraftforge.fml.common.network.simpleimpl.MessageContext;
+import net.minecraftforge.fml.relauncher.Side;
+import nl.requios.effortlessbuilding.EffortlessBuilding;
+import nl.requios.effortlessbuilding.network.BuildSettingsMessage;
+import nl.requios.effortlessbuilding.network.QuickReplaceMessage;
 
 public class ServerProxy implements IProxy
 {
+    //Only physical server! Singleplayer server is seen as clientproxy
     @Override
     public void preInit(FMLPreInitializationEvent event)
     {
@@ -35,4 +43,9 @@ public class ServerProxy implements IProxy
     {
         return ctx.getServerHandler().player;
     }
+
+    @Override
+    public IThreadListener getThreadListenerFromContext(MessageContext ctx) {
+        return ((EntityPlayerMP) getPlayerEntityFromContext(ctx)).getServerWorld();
+    }
 }

src/main/resources/assets/effortlessbuilding/models/item/randomizer_bag.json

@@ -1,6 +1,6 @@
 {
     "parent": "item/generated",
     "textures": {
-        "layer0": "items/fireball"
+        "layer0": "effortlessbuilding:items/randomizerbag"
     }
 }

src/main/resources/assets/effortlessbuilding/recipes/randomizer_bag.json

@@ -0,0 +1,20 @@
+{
+    "type": "minecraft:crafting_shaped",
+    "pattern": [
+        " # ",
+        "#O#",
+        " # "
+    ],
+    "key": {
+        "#": {
+            "item": "minecraft:leather"
+        },
+		"O": {
+            "item": "minecraft:planks",
+			"data": 32767
+        }
+    },
+    "result": {
+        "item": "effortlessbuilding:randomizer_bag"
+    }
+}

src/main/resources/mcmod.info

@@ -5,7 +5,7 @@
   "description": "Makes building easier by providing tools like mirrors, arrays, quickreplace and a block randomizer.",
   "version": "${version}",
   "mcversion": "${mcversion}",
-  "url": "https://requios.nl/",
+  "url": "https://minecraft.curseforge.com/projects/effortless-building",
   "updateUrl": "",
   "authorList": ["Requios"],
   "credits": "",