Implement IPlantable and hooks surrounding it (#102)

* Implement IPlantable and hooks surrounding it

* We're not a patch file

* Whitespace

Author: cittyinthecloud

patchwork-enum-hacks/src/main/java/net/patchworkmc/api/enumhacks/EnumHacks.java

@@ -135,7 +135,7 @@ private static void clearCachedValues(Class<? extends Enum<?>> clazz) {
 		}
 	}
 
-	private static <T extends Enum<T>> T constructAndAdd(Class<T> clazz, IntFunction<? extends T> constructor) {
+	public static <T extends Enum<T>> T constructAndAdd(Class<T> clazz, IntFunction<? extends T> constructor) {
 		T[] values = clazz.getEnumConstants();
 		T instance = constructor.apply(values.length);
 		addToValues(values, instance);

patchwork-extensions-block/build.gradle

@@ -1,2 +1,6 @@
-archivesBaseName = "patchwork-extensions-block"
-version = getSubprojectVersion(project, "0.1.0")
+archivesBaseName = "patchwork-extensions-block"
+version = getSubprojectVersion(project, "0.1.0")
+
+dependencies {
+	compile project(path: ':patchwork-enum-hacks', configuration: 'dev')
+}

patchwork-extensions-block/src/main/java/net/minecraftforge/common/IPlantable.java

@@ -0,0 +1,45 @@
+/*
+ * Minecraft Forge, Patchwork Project
+ * Copyright (c) 2016-2020, 2019-2020
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation version 2.1
+ * of the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+package net.minecraftforge.common;
+
+import net.minecraft.block.BlockState;
+import net.minecraft.block.Blocks;
+import net.minecraft.block.CropBlock;
+import net.minecraft.block.FlowerBlock;
+import net.minecraft.block.SaplingBlock;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.BlockView;
+
+public interface IPlantable {
+	default PlantType getPlantType(BlockView world, BlockPos pos) {
+		if (this instanceof CropBlock) return PlantType.Crop;
+		if (this instanceof SaplingBlock) return PlantType.Plains;
+		if (this instanceof FlowerBlock) return PlantType.Plains;
+		if (this == Blocks.CACTUS) return PlantType.Desert;
+		if (this == Blocks.LILY_PAD) return PlantType.Water;
+		if (this == Blocks.RED_MUSHROOM) return PlantType.Cave;
+		if (this == Blocks.BROWN_MUSHROOM) return PlantType.Cave;
+		if (this == Blocks.NETHER_WART) return PlantType.Nether;
+		if (this == Blocks.TALL_GRASS) return PlantType.Plains;
+		return net.minecraftforge.common.PlantType.Plains;
+	}
+
+	BlockState getPlant(BlockView world, BlockPos pos);
+}

patchwork-extensions-block/src/main/java/net/minecraftforge/common/PlantType.java

@@ -0,0 +1,56 @@
+/*
+ * Minecraft Forge, Patchwork Project
+ * Copyright (c) 2016-2020, 2019-2020
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation version 2.1
+ * of the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+package net.minecraftforge.common;
+
+import net.minecraft.block.BlockState;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Direction;
+import net.minecraft.world.BlockView;
+
+import net.patchworkmc.api.enumhacks.EnumHacks;
+import net.patchworkmc.mixin.extensions.block.PlantTypeAccessor;
+
+public enum PlantType {
+	Plains,
+	Desert,
+	Beach,
+	Cave,
+	Water,
+	Nether,
+	Crop;
+
+	/**
+	 * Getting a custom {@link PlantType}, or an existing one if it has the same name as that one. Your plant should implement {@link IPlantable}
+	 * and return this custom type in {@link IPlantable#getPlantType(net.minecraft.world.BlockView, BlockPos)}.
+	 *
+	 * <p>If your new plant grows on blocks like any one of them above, never create a new {@link PlantType}.
+	 * This enumeration is only functioning in
+	 * {@link net.minecraftforge.common.extensions.IForgeBlock#canSustainPlant(BlockState, BlockView, BlockPos, Direction, IPlantable)}
+	 * which you are supposed to override this function in your new block and create a new plant type to grow on that block.
+	 *
+	 * <p>You can create an instance of your plant type in your API and let your/others mods access it. It will be faster than calling this method.
+	 *
+	 * @param name the name of the type of plant, you had better follow the style above
+	 * @return the acquired {@link PlantType}, a new one if not found.
+	 */
+	public static PlantType create(String name) {
+		return EnumHacks.constructAndAdd(PlantType.class, ordinal -> PlantTypeAccessor.invokeConstructor(name, ordinal));
+	}
+}