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

package de.ellpeck.naturesaura;

import baubles.api.BaublesApi;
import de.ellpeck.naturesaura.aura.Capabilities;
import de.ellpeck.naturesaura.aura.item.IAuraRecharge;
import de.ellpeck.naturesaura.blocks.tiles.TileEntityImpl;
import de.ellpeck.naturesaura.compat.Compat;
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;
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;
import net.minecraft.world.gen.ChunkProviderServer;
import net.minecraftforge.common.capabilities.Capability;
import net.minecraftforge.common.capabilities.ICapabilityProvider;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;
import net.minecraftforge.items.IItemHandler;
import net.minecraftforge.items.IItemHandlerModifiable;
import org.lwjgl.opengl.GL11;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.util.List;
import java.util.function.Consumer;

public final class Helper {

    public static void getTileEntitiesInArea(World world, BlockPos pos, int radius, Consumer<TileEntity> consumer) {
        for (int x = (pos.getX() - radius) >> 4; x <= (pos.getX() + radius) >> 4; x++) {
            for (int z = (pos.getZ() - radius) >> 4; z <= (pos.getZ() + radius) >> 4; z++) {
                if (isChunkLoaded(world, x, z)) {
                    for (TileEntity tile : world.getChunk(x, z).getTileEntityMap().values()) {
                        if (tile.getPos().distanceSq(pos) <= radius * radius)
                            consumer.accept(tile);
                    }
                }
            }
        }
    }

    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) {
        IChunkProvider provider = world.getChunkProvider();
        if (provider instanceof ChunkProviderServer)
            return ((ChunkProviderServer) provider).chunkExists(x, z);
        else
            return !provider.provideChunk(x, z).isEmpty();
    }

    @SideOnly(Side.CLIENT)
    public static int blendColors(int c1, int c2, float ratio) {
        int a = (int) ((c1 >> 24 & 0xFF) * ratio + (c2 >> 24 & 0xFF) * (1 - ratio));
        int r = (int) ((c1 >> 16 & 0xFF) * ratio + (c2 >> 16 & 0xFF) * (1 - ratio));
        int g = (int) ((c1 >> 8 & 0xFF) * ratio + (c2 >> 8 & 0xFF) * (1 - ratio));
        int b = (int) ((c1 & 0xFF) * ratio + (c2 & 0xFF) * (1 - ratio));
        return ((a & 255) << 24) | ((r & 255) << 16) | ((g & 255) << 8) | (b & 255);
    }

    public static int getItemIndex(List<ItemStack> list, ItemStack item) {
        for (int i = 0; i < list.size(); i++) {
            if (list.get(i).isItemEqual(item)) {
                return i;
            }
        }
        return -1;
    }

    @SideOnly(Side.CLIENT)
    public static void renderItemInWorld(ItemStack stack) {
        if (!stack.isEmpty()) {
            GlStateManager.pushMatrix();
            GlStateManager.disableLighting();
            GlStateManager.pushAttrib();
            RenderHelper.enableStandardItemLighting();
            Minecraft.getMinecraft().getRenderItem().renderItem(stack, ItemCameraTransforms.TransformType.FIXED);
            RenderHelper.disableStandardItemLighting();
            GlStateManager.popAttrib();
            GlStateManager.enableLighting();
            GlStateManager.popMatrix();
        }
    }

    @SideOnly(Side.CLIENT)
    public static void renderItemInGui(ItemStack stack, int x, int y, float scale) {
        GlStateManager.pushMatrix();
        GlStateManager.enableBlend();
        GlStateManager.blendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
        RenderHelper.enableGUIStandardItemLighting();
        GlStateManager.enableDepth();
        GlStateManager.enableRescaleNormal();
        GlStateManager.translate(x, y, 0);
        GlStateManager.scale(scale, scale, scale);
        Minecraft.getMinecraft().getRenderItem().renderItemAndEffectIntoGUI(stack, 0, 0);
        Minecraft.getMinecraft().getRenderItem().renderItemOverlayIntoGUI(Minecraft.getMinecraft().fontRenderer, stack, 0, 0, null);
        RenderHelper.disableStandardItemLighting();
        GlStateManager.popMatrix();
    }

    public static boolean putStackOnTile(EntityPlayer player, EnumHand hand, BlockPos pos, int slot, boolean sound) {
        TileEntity tile = player.world.getTileEntity(pos);
        if (tile instanceof TileEntityImpl) {
            IItemHandlerModifiable handler = ((TileEntityImpl) tile).getItemHandler(null);
            if (handler != null) {
                ItemStack handStack = player.getHeldItem(hand);
                if (!handStack.isEmpty()) {
                    ItemStack remain = handler.insertItem(slot, handStack, player.world.isRemote);
                    if (!ItemStack.areItemStacksEqual(remain, handStack)) {
                        if (sound)
                            player.world.playSound(player, pos.getX() + 0.5, pos.getY() + 0.5, pos.getZ() + 0.5,
                                    SoundEvents.ENTITY_ITEMFRAME_ADD_ITEM, SoundCategory.PLAYERS, 0.75F, 1F);
                        if (!player.world.isRemote)
                            player.setHeldItem(hand, remain);
                        return true;
                    }
                }

                if (!handler.getStackInSlot(slot).isEmpty()) {
                    if (sound)
                        player.world.playSound(player, pos.getX() + 0.5, pos.getY() + 0.5, pos.getZ() + 0.5,
                                SoundEvents.ENTITY_ITEMFRAME_REMOVE_ITEM, SoundCategory.PLAYERS, 0.75F, 1F);
                    if (!player.world.isRemote) {
                        player.addItemStackToInventory(handler.getStackInSlot(slot));
                        handler.setStackInSlot(slot, ItemStack.EMPTY);
                    }
                    return true;
                }
            }
        }
        return false;
    }

    public static ICapabilityProvider makeRechargeProvider(ItemStack stack) {
        return new ICapabilityProvider() {
            private final IAuraRecharge recharge = container -> {
                int toDrain = 3;
                if (stack.getItemDamage() > 0 && container.drainAura(toDrain, true) >= toDrain) {
                    stack.setItemDamage(stack.getItemDamage() - 1);
                    container.drainAura(toDrain, false);
                }
            };

            @Override
            public boolean hasCapability(@Nonnull Capability<?> capability, @Nullable EnumFacing facing) {
                return capability == Capabilities.auraRecharge;
            }

            @Nullable
            @Override
            public <T> T getCapability(@Nonnull Capability<T> capability, @Nullable EnumFacing facing) {
                return capability == Capabilities.auraRecharge ? (T) this.recharge : null;
            }
        };
    }

    public static boolean extractAuraFromPlayer(EntityPlayer player, int amount, boolean simulate) {
        if (Compat.baubles) {
            IItemHandler baubles = BaublesApi.getBaublesHandler(player);
            for (int i = 0; i < baubles.getSlots(); i++) {
                ItemStack stack = baubles.getStackInSlot(i);
                if (!stack.isEmpty() && stack.hasCapability(Capabilities.auraContainer, null)) {
                    amount -= stack.getCapability(Capabilities.auraContainer, null).drainAura(amount, simulate);
                    if (amount <= 0) {
                        return true;
                    }
                }
            }
        }

        for (int i = 0; i < player.inventory.getSizeInventory(); i++) {
            ItemStack stack = player.inventory.getStackInSlot(i);
            if (!stack.isEmpty() && stack.hasCapability(Capabilities.auraContainer, null)) {
                amount -= stack.getCapability(Capabilities.auraContainer, null).drainAura(amount, simulate);
                if (amount <= 0) {
                    return true;
                }
            }
        }

        return false;
    }
}