add the placer

src/main/java/de/ellpeck/naturesaura/Helper.java

@@ -9,6 +9,7 @@ import net.minecraft.client.Minecraft;
 import net.minecraft.client.renderer.GlStateManager;
 import net.minecraft.client.renderer.RenderHelper;
 import net.minecraft.client.renderer.block.model.ItemCameraTransforms;
+import net.minecraft.entity.item.EntityItemFrame;
 import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.init.SoundEvents;
 import net.minecraft.item.ItemStack;
@@ -16,6 +17,7 @@ import net.minecraft.tileentity.TileEntity;
 import net.minecraft.util.EnumFacing;
 import net.minecraft.util.EnumHand;
 import net.minecraft.util.SoundCategory;
+import net.minecraft.util.math.AxisAlignedBB;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.World;
 import net.minecraft.world.chunk.IChunkProvider;
@@ -48,6 +50,17 @@ public final class Helper {
         }
     }
 
+    public static List<EntityItemFrame> getAttachedItemFrames(World world, BlockPos pos) {
+        List<EntityItemFrame> frames = world.getEntitiesWithinAABB(EntityItemFrame.class, new AxisAlignedBB(pos).grow(0.25));
+        for (int i = frames.size() - 1; i >= 0; i--) {
+            EntityItemFrame frame = frames.get(i);
+            BlockPos framePos = frame.getHangingPosition().offset(frame.facingDirection.getOpposite());
+            if (!pos.equals(framePos))
+                frames.remove(i);
+        }
+        return frames;
+    }
+
     // For some reason this method isn't public in World, but I also don't want to have to make a new BlockPos
     // or use the messy MutableBlockPos system just to see if a chunk is loaded, so this will have to do I guess
     public static boolean isChunkLoaded(World world, int x, int z) {

src/main/java/de/ellpeck/naturesaura/blocks/BlockPlacer.java

@@ -0,0 +1,14 @@
+package de.ellpeck.naturesaura.blocks;
+
+import de.ellpeck.naturesaura.blocks.tiles.TileEntityPlacer;
+import net.minecraft.block.SoundType;
+import net.minecraft.block.material.Material;
+
+public class BlockPlacer extends BlockContainerImpl {
+
+    public BlockPlacer() {
+        super(Material.ROCK, "placer", TileEntityPlacer.class, "placer");
+        this.setSoundType(SoundType.STONE);
+        this.setHardness(2.5F);
+    }
+}

src/main/java/de/ellpeck/naturesaura/blocks/ModBlocks.java

@@ -29,4 +29,5 @@ public final class ModBlocks {
     public static final Block AURA_DETECTOR = new BlockAuraDetector();
     public static final Block CONVERSION_CATALYST = new BlockImpl("conversion_catalyst", Material.ROCK).setSoundType(SoundType.STONE).setHardness(2.5F);
     public static final Block FLOWER_GENERATOR = new BlockFlowerGenerator();
+    public static final Block PLACER = new BlockPlacer();
 }

src/main/java/de/ellpeck/naturesaura/blocks/tiles/TileEntityNatureAltar.java

@@ -188,10 +188,11 @@ public class TileEntityNatureAltar extends TileEntityImpl implements ITickable {
     @Override
     public void writeNBT(NBTTagCompound compound, SaveType type) {
         super.writeNBT(compound, type);
-        compound.setTag("items", this.items.serializeNBT());
+        if (type != SaveType.BLOCK) {
-        compound.setBoolean("fine", this.structureFine);
+            compound.setTag("items", this.items.serializeNBT());
-        this.container.writeNBT(compound);
+            compound.setBoolean("fine", this.structureFine);
-
+            this.container.writeNBT(compound);
+        }
         if (type == SaveType.TILE) {
             if (this.currentRecipe != null) {
                 compound.setString("recipe", this.currentRecipe.name.toString());
@@ -203,10 +204,11 @@ public class TileEntityNatureAltar extends TileEntityImpl implements ITickable {
     @Override
     public void readNBT(NBTTagCompound compound, SaveType type) {
         super.readNBT(compound, type);
-        this.items.deserializeNBT(compound.getCompoundTag("items"));
+        if (type != SaveType.BLOCK) {
-        this.structureFine = compound.getBoolean("fine");
+            this.items.deserializeNBT(compound.getCompoundTag("items"));
-        this.container.readNBT(compound);
+            this.structureFine = compound.getBoolean("fine");
-
+            this.container.readNBT(compound);
+        }
         if (type == SaveType.TILE) {
             if (compound.hasKey("recipe")) {
                 this.currentRecipe = AltarRecipe.RECIPES.get(new ResourceLocation(compound.getString("recipe")));

src/main/java/de/ellpeck/naturesaura/blocks/tiles/TileEntityPlacer.java

@@ -0,0 +1,144 @@
+package de.ellpeck.naturesaura.blocks.tiles;
+
+import de.ellpeck.naturesaura.Helper;
+import de.ellpeck.naturesaura.aura.chunk.AuraChunk;
+import de.ellpeck.naturesaura.blocks.ModBlocks;
+import net.minecraft.block.state.IBlockState;
+import net.minecraft.entity.item.EntityItemFrame;
+import net.minecraft.init.Blocks;
+import net.minecraft.init.Items;
+import net.minecraft.item.Item;
+import net.minecraft.item.ItemStack;
+import net.minecraft.nbt.NBTTagCompound;
+import net.minecraft.tileentity.TileEntity;
+import net.minecraft.util.EnumFacing;
+import net.minecraft.util.EnumHand;
+import net.minecraft.util.ITickable;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.WorldServer;
+import net.minecraftforge.common.IPlantable;
+import net.minecraftforge.common.util.FakePlayer;
+import net.minecraftforge.common.util.FakePlayerFactory;
+import net.minecraftforge.items.CapabilityItemHandler;
+import net.minecraftforge.items.IItemHandler;
+import net.minecraftforge.items.IItemHandlerModifiable;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class TileEntityPlacer extends TileEntityImpl implements ITickable {
+
+    private final ItemStackHandlerNA handler = new ItemStackHandlerNA(1, this, true);
+
+    @Override
+    public void update() {
+        if (!this.world.isRemote && this.world.getTotalWorldTime() % 15 == 0) {
+            TileEntity tileUp = this.world.getTileEntity(this.pos.up());
+            if (tileUp == null || !tileUp.hasCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, EnumFacing.DOWN))
+                return;
+            IItemHandler handler = tileUp.getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, EnumFacing.DOWN);
+            if (handler == null)
+                return;
+            List<EntityItemFrame> frames = Helper.getAttachedItemFrames(this.world, this.pos);
+            if (frames.isEmpty())
+                return;
+
+            List<BlockPos> validPositions = new ArrayList<>();
+            int range = 5;
+            for (int x = -range; x <= range; x++)
+                for (int y = -range; y <= range; y++)
+                    for (int z = -range; z <= range; z++) {
+                        BlockPos pos = this.pos.add(x, y, z);
+                        if (!this.framesContain(frames, pos, this.world.getBlockState(pos)))
+                            continue;
+
+                        BlockPos up = pos.up();
+                        IBlockState state = this.world.getBlockState(up);
+                        if (state.getBlock().isReplaceable(this.world, up))
+                            validPositions.add(up);
+                    }
+            if (validPositions.isEmpty())
+                return;
+
+            for (int i = 0; i < handler.getSlots(); i++) {
+                ItemStack stack = handler.extractItem(i, 1, true);
+                if (stack.isEmpty())
+                    continue;
+
+                BlockPos pos = validPositions.get(this.world.rand.nextInt(validPositions.size()));
+                ItemStack left = this.tryPlace(stack.copy(), pos);
+                if (ItemStack.areItemStacksEqual(stack, left))
+                    continue;
+
+                handler.extractItem(i, 1, false);
+                BlockPos spot = AuraChunk.getHighestSpot(this.world, this.pos, 10, this.pos);
+                AuraChunk.getAuraChunk(this.world, spot).drainAura(spot, 10);
+                return;
+            }
+        }
+    }
+
+    private boolean framesContain(List<EntityItemFrame> frames, BlockPos pos, IBlockState state) {
+        ItemStack stack = state.getBlock().getItem(this.world, pos, state);
+        if (stack.isEmpty())
+            return false;
+
+        for (EntityItemFrame frame : frames) {
+            ItemStack frameStack = frame.getDisplayedItem();
+            if (!frameStack.isEmpty() && stack.isItemEqual(frameStack))
+                return true;
+        }
+        return false;
+    }
+
+    private ItemStack tryPlace(ItemStack stack, BlockPos pos) {
+        if (this.handleSpecialCases(stack, pos))
+            return stack;
+
+        if (!(this.world instanceof WorldServer))
+            return stack;
+
+        FakePlayer fake = FakePlayerFactory.getMinecraft((WorldServer) this.world);
+        fake.inventory.mainInventory.set(fake.inventory.currentItem, stack);
+        fake.interactionManager.processRightClickBlock(fake, this.world, fake.getHeldItemMainhand(), EnumHand.MAIN_HAND,
+                pos, EnumFacing.DOWN, 0.5F, 0.5F, 0.5F);
+        return fake.getHeldItemMainhand().copy();
+    }
+
+    private boolean handleSpecialCases(ItemStack stack, BlockPos pos) {
+        if (stack.getItem() == Items.REDSTONE)
+            this.world.setBlockState(pos, Blocks.REDSTONE_WIRE.getDefaultState());
+        else if (stack.getItem() == Item.getItemFromBlock(ModBlocks.GOLD_POWDER))
+            this.world.setBlockState(pos, ModBlocks.GOLD_POWDER.getDefaultState());
+        else if (stack.getItem() instanceof IPlantable) {
+            IPlantable plantable = (IPlantable) stack.getItem();
+            IBlockState plant = plantable.getPlant(this.world, pos);
+            if (!plant.getBlock().canPlaceBlockAt(this.world, pos))
+                return false;
+            this.world.setBlockState(pos, plant);
+        } else
+            return false;
+
+        stack.shrink(1);
+        return true;
+    }
+
+    @Override
+    public IItemHandlerModifiable getItemHandler(EnumFacing facing) {
+        return this.handler;
+    }
+
+    @Override
+    public void readNBT(NBTTagCompound compound, SaveType type) {
+        super.readNBT(compound, type);
+        if (type != SaveType.BLOCK)
+            this.handler.deserializeNBT(compound.getCompoundTag("items"));
+    }
+
+    @Override
+    public void writeNBT(NBTTagCompound compound, SaveType type) {
+        super.writeNBT(compound, type);
+        if (type != SaveType.BLOCK)
+            compound.setTag("items", this.handler.serializeNBT());
+    }
+}

src/main/java/de/ellpeck/naturesaura/blocks/tiles/TileEntityWoodStand.java

@@ -164,7 +164,8 @@ public class TileEntityWoodStand extends TileEntityImpl implements ITickable {
     @Override
     public void writeNBT(NBTTagCompound compound, SaveType type) {
         super.writeNBT(compound, type);
-        compound.setTag("items", this.items.serializeNBT());
+        if (type != SaveType.BLOCK)
+            compound.setTag("items", this.items.serializeNBT());
 
         if (type == SaveType.TILE) {
             if (this.ritualPos != null && this.recipe != null) {
@@ -178,7 +179,8 @@ public class TileEntityWoodStand extends TileEntityImpl implements ITickable {
     @Override
     public void readNBT(NBTTagCompound compound, SaveType type) {
         super.readNBT(compound, type);
-        this.items.deserializeNBT(compound.getCompoundTag("items"));
+        if (type != SaveType.BLOCK)
+            this.items.deserializeNBT(compound.getCompoundTag("items"));
 
         if (type == SaveType.TILE) {
             if (compound.hasKey("recipe")) {

src/main/resources/assets/naturesaura/blockstates/placer.json

@@ -0,0 +1,20 @@
+{
+    "forge_marker": 1,
+    "defaults": {
+        "model": "minecraft:cube",
+        "textures": {
+            "particle": "naturesaura:blocks/placer",
+            "up": "naturesaura:blocks/placer_top",
+            "down": "naturesaura:blocks/placer_top",
+            "north": "#particle",
+            "east": "#particle",
+            "south": "#particle",
+            "west": "#particle"
+        },
+        "transform": "forge:default-block"
+    },
+    "variants": {
+        "normal": [{}],
+        "inventory": [{}]
+    }
+}

src/main/resources/assets/naturesaura/lang/en_US.lang

@@ -26,6 +26,7 @@ tile.naturesaura.infused_brick_stairs.name=Infused Brick Stairs
 tile.naturesaura.infused_brick_slab.name=Infused Brick Slab
 tile.naturesaura.infused_brick_slab_double.name=Infused Brick Double Slab
 tile.naturesaura.flower_generator.name=Herbivorous Absorber
+tile.naturesaura.placer.name=Imperceptible Builder
 
 item.naturesaura.eye.name=Environmental Eye
 item.naturesaura.gold_fiber.name=Brilliant Fiber