Highly experimental "NBT of file" expression.

I still need to do a lot more testing, my testserver's level.dat got to
0KB when using the "add blah to nbt of file" :o

bin/.gitignore

@@ -1 +1,2 @@
 /me/
+/org/

src/me/TheBukor/SkStuff.java

@@ -21,6 +21,9 @@ import me.TheBukor.effects.EffUndoRedoSession;
 import me.TheBukor.expressions.ExprAreaOfSelection;
 import me.TheBukor.expressions.ExprChangedBlocksSession;
 import me.TheBukor.expressions.ExprEditSessionLimit;
+import me.TheBukor.expressions.ExprFileNBTv1_8_R1;
+import me.TheBukor.expressions.ExprFileNBTv1_8_R2;
+import me.TheBukor.expressions.ExprFileNBTv1_8_R3;
 import me.TheBukor.expressions.ExprHeightOfSchematic;
 import me.TheBukor.expressions.ExprHeightOfSelection;
 import me.TheBukor.expressions.ExprItemNBTv1_8_R1;
@@ -62,6 +65,7 @@ public class SkStuff extends JavaPlugin {
 				Skript.registerExpression(ExprNBTv1_8_R1.class, NBTTagCompound.class, ExpressionType.PROPERTY, "nbt[[ ]tag[s]] of %entity/block/itemstack%", "%entity/block/itemstack%'s nbt[[ ]tag[s]]");
 				Skript.registerExpression(ExprItemNBTv1_8_R1.class, ItemStack.class, ExpressionType.SIMPLE, "%itemstack% with [custom] nbt[[ ]tag[s]] %string%");
 				Skript.registerExpression(ExprTagOfv1_8_R1.class, Object.class, ExpressionType.SIMPLE, "[nbt[ ]]tag %string% of [nbt [compound]] %compound%");
+				Skript.registerExpression(ExprFileNBTv1_8_R1.class, NBTTagCompound.class, ExpressionType.PROPERTY, "nbt[[ ]tag[s]] of [file] %string%");
 				Classes.registerClass(new ClassInfo<NBTTagCompound>(NBTTagCompound.class, "compound").name("NBT Tag Compound").parser(new Parser<NBTTagCompound>() {
 
 					@Override
@@ -99,6 +103,7 @@ public class SkStuff extends JavaPlugin {
 				Skript.registerExpression(ExprNBTv1_8_R2.class, net.minecraft.server.v1_8_R2.NBTTagCompound.class, ExpressionType.PROPERTY, "nbt[[ ]tag[s]] of %entity/block/itemstack%", "%entity/block/itemstack%'s nbt[[ ]tag[s]]");
 				Skript.registerExpression(ExprItemNBTv1_8_R2.class, ItemStack.class, ExpressionType.SIMPLE, "%itemstack% with [custom] nbt[[ ]tag[s]] %string%");
 				Skript.registerExpression(ExprTagOfv1_8_R2.class, Object.class, ExpressionType.SIMPLE, "[nbt[ ]]tag %string% of [nbt [compound]] %compound%");
+				Skript.registerExpression(ExprFileNBTv1_8_R2.class, net.minecraft.server.v1_8_R2.NBTTagCompound.class, ExpressionType.PROPERTY, "nbt[[ ]tag[s]] of [file] %string%");
 				Classes.registerClass(new ClassInfo<net.minecraft.server.v1_8_R2.NBTTagCompound>(net.minecraft.server.v1_8_R2.NBTTagCompound.class, "compound").name("NBT Tag Compound").parser(new Parser<net.minecraft.server.v1_8_R2.NBTTagCompound>() {
 
 					@Override
@@ -140,6 +145,7 @@ public class SkStuff extends JavaPlugin {
 				Skript.registerExpression(ExprNBTv1_8_R3.class, net.minecraft.server.v1_8_R3.NBTTagCompound.class, ExpressionType.PROPERTY, "nbt[[ ]tag[s]] of %entity/block/itemstack%", "%entity/block/itemstack%'s nbt[[ ]tag[s]]");
 				Skript.registerExpression(ExprItemNBTv1_8_R3.class, ItemStack.class, ExpressionType.SIMPLE, "%itemstack% with [custom] nbt[[ ]tag[s]] %string%");
 				Skript.registerExpression(ExprTagOfv1_8_R3.class, Object.class, ExpressionType.SIMPLE, "[nbt[ ]]tag %string% of [nbt [compound]] %compound%");
+				Skript.registerExpression(ExprFileNBTv1_8_R3.class, net.minecraft.server.v1_8_R3.NBTTagCompound.class, ExpressionType.PROPERTY, "nbt[[ ]tag[s]] of [file] %string%");
 				Classes.registerClass(new ClassInfo<net.minecraft.server.v1_8_R3.NBTTagCompound>(net.minecraft.server.v1_8_R3.NBTTagCompound.class, "compound").name("NBT Compound").parser(new Parser<net.minecraft.server.v1_8_R3.NBTTagCompound>() {
 
 					@Override
@@ -196,10 +202,10 @@ public class SkStuff extends JavaPlugin {
 				Skript.registerExpression(ExprLengthOfSelection.class, Integer.class, ExpressionType.SIMPLE, "(z( |-)size|length) of [(world[ ]edit|we)] selection of %player%", "%player%'s [(world[ ]edit|we) ]selection (z( |-)size|length)");
 				Skript.registerExpression(ExprHeightOfSelection.class, Integer.class, ExpressionType.SIMPLE, "(y( |-)size|height) of [(world[ ]edit|we)] selection of %player%", "%player%'s [(world[ ]edit|we) ]selection (y( |-)size|height)");
 				Skript.registerExpression(ExprAreaOfSelection.class, Integer.class, ExpressionType.SIMPLE, "area of [(world[ ]edit|we)] selection of %player%", "%player%'s [(world[ ]edit|we)] selection area");
-				Skript.registerExpression(ExprVolumeOfSchematic.class, Integer.class, ExpressionType.SIMPLE, "volume of schem[atic] %string% [from [folder] %-string%]");
+				Skript.registerExpression(ExprVolumeOfSchematic.class, Integer.class, ExpressionType.SIMPLE, "volume of schem[atic] %string%");
-				Skript.registerExpression(ExprWidthOfSchematic.class, Integer.class, ExpressionType.SIMPLE, "(x( |-)size|width) of schem[atic] %string% [from [folder] %-string%]");
+				Skript.registerExpression(ExprWidthOfSchematic.class, Integer.class, ExpressionType.SIMPLE, "(x( |-)size|width) of schem[atic] %string%");
-				Skript.registerExpression(ExprHeightOfSchematic.class, Integer.class, ExpressionType.SIMPLE, "(y( |-)size|height) of schem[atic] %string% [from [folder] %-string%]");
+				Skript.registerExpression(ExprHeightOfSchematic.class, Integer.class, ExpressionType.SIMPLE, "(y( |-)size|height) of schem[atic] %string%");
-				Skript.registerExpression(ExprLengthOfSchematic.class, Integer.class, ExpressionType.SIMPLE, "(z( |-)size|length) of schem[atic] %string% [from [folder] %-string%]");
+				Skript.registerExpression(ExprLengthOfSchematic.class, Integer.class, ExpressionType.SIMPLE, "(z( |-)size|length) of schem[atic] %string%");
 				Classes.registerClass(new ClassInfo<EditSession>(EditSession.class, "editsession").name("Edit Session").parser(new Parser<EditSession>() {
 
 					@Override

src/me/TheBukor/expressions/ExprFileNBTv1_8_R1.java

@@ -0,0 +1,123 @@
+package me.TheBukor.expressions;
+
+import java.io.EOFException;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.zip.ZipException;
+
+import javax.annotation.Nullable;
+
+import org.bukkit.event.Event;
+
+import ch.njol.skript.classes.Changer.ChangeMode;
+import ch.njol.skript.lang.Expression;
+import ch.njol.skript.lang.SkriptParser.ParseResult;
+import ch.njol.skript.lang.util.SimpleExpression;
+import ch.njol.util.Kleenean;
+import ch.njol.util.coll.CollectionUtils;
+import net.minecraft.server.v1_8_R1.MojangsonParser;
+import net.minecraft.server.v1_8_R1.NBTCompressedStreamTools;
+import net.minecraft.server.v1_8_R1.NBTTagCompound;
+
+public class ExprFileNBTv1_8_R1 extends SimpleExpression<NBTTagCompound> {
+	private Expression<String> input;
+
+	@Override
+	public Class<? extends NBTTagCompound> getReturnType() {
+		return NBTTagCompound.class;
+	}
+
+	@Override
+	public boolean isSingle() {
+		return true;
+	}
+
+	@SuppressWarnings("unchecked")
+	@Override
+	public boolean init(Expression<?>[] expr, int matchedPattern, Kleenean arg2, ParseResult arg3) {
+		input = (Expression<String>) expr[0];
+		return true;
+	}
+
+	@Override
+	public String toString(@Nullable Event e, boolean arg1) {
+		return "the NBT of file from file " + input.toString(e, false);
+	}
+
+	@Override
+	@Nullable
+	protected NBTTagCompound[] get(Event e) {
+		NBTTagCompound NBT = null;
+		File file = new File(input.getSingle(e));
+		if (file.exists()) {
+			try {
+				InputStream fis = new FileInputStream(file);
+				NBT = NBTCompressedStreamTools.a(fis);
+				fis.close();
+			} catch (EOFException ex) {
+				//End of file, no error.
+			} catch (ZipException ex) {
+				return null; //Not a valid file (not compressed in GZIP format)
+			} catch (IOException ex) {
+				ex.printStackTrace();
+			}
+		} else {
+			return null; // Specified file doesn't exist
+		}
+		return new NBTTagCompound[] { NBT };
+	}
+
+	@Override
+	public void change(Event e, @Nullable Object[] delta, ChangeMode mode) {
+		File file = new File(input.getSingle(e));
+		String tags = (String) delta[0];
+		if (mode == ChangeMode.ADD) {
+			try {
+				InputStream fis = new FileInputStream(file);
+				NBTTagCompound NBT = NBTCompressedStreamTools.a(fis);
+				OutputStream os = new FileOutputStream(file);
+				NBTTagCompound NBT1 = MojangsonParser.parse(tags);
+				NBT.a(NBT1);
+				NBTCompressedStreamTools.a(NBT, os);
+				fis.close();
+				os.close();
+			} catch (EOFException ex) {
+				//End of file, no error.
+			} catch (ZipException ex) {
+				return; //Not a valid file (not compressed in GZIP format)
+			} catch (IOException ex) {
+				ex.printStackTrace();
+			}
+		} else if (mode == ChangeMode.REMOVE) {
+			try {
+				InputStream fis = new FileInputStream(file);
+				NBTTagCompound NBT = NBTCompressedStreamTools.a(fis);
+				OutputStream os = new FileOutputStream(file);
+				NBT.remove(tags);
+				NBTCompressedStreamTools.a(NBT, os);
+				fis.close();
+				os.close();
+			} catch (EOFException ex) {
+				//End of file, no error.
+			} catch (ZipException ex) {
+				return; //Not a valid file (not compressed in GZIP format)
+			} catch (IOException ex) {
+				ex.printStackTrace();
+			}
+		}
+	}
+
+	@SuppressWarnings("unchecked")
+	@Override
+	@Nullable
+	public Class<?>[] acceptChange(ChangeMode mode) {
+		if (mode == ChangeMode.ADD || mode == ChangeMode.REMOVE) {
+			return CollectionUtils.array(String.class);
+		}
+		return null;
+	}
+}

src/me/TheBukor/expressions/ExprFileNBTv1_8_R2.java

@@ -0,0 +1,127 @@
+package me.TheBukor.expressions;
+
+import java.io.EOFException;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.zip.ZipException;
+
+import javax.annotation.Nullable;
+
+import org.bukkit.event.Event;
+
+import ch.njol.skript.Skript;
+import ch.njol.skript.classes.Changer.ChangeMode;
+import ch.njol.skript.lang.Expression;
+import ch.njol.skript.lang.SkriptParser.ParseResult;
+import ch.njol.skript.lang.util.SimpleExpression;
+import ch.njol.util.Kleenean;
+import ch.njol.util.coll.CollectionUtils;
+import net.minecraft.server.v1_8_R2.MojangsonParseException;
+import net.minecraft.server.v1_8_R2.MojangsonParser;
+import net.minecraft.server.v1_8_R2.NBTCompressedStreamTools;
+import net.minecraft.server.v1_8_R2.NBTTagCompound;
+
+public class ExprFileNBTv1_8_R2 extends SimpleExpression<NBTTagCompound> {
+	private Expression<String> input;
+
+	@Override
+	public Class<? extends NBTTagCompound> getReturnType() {
+		return NBTTagCompound.class;
+	}
+
+	@Override
+	public boolean isSingle() {
+		return true;
+	}
+
+	@SuppressWarnings("unchecked")
+	@Override
+	public boolean init(Expression<?>[] expr, int matchedPattern, Kleenean arg2, ParseResult arg3) {
+		input = (Expression<String>) expr[0];
+		return true;
+	}
+
+	@Override
+	public String toString(@Nullable Event e, boolean arg1) {
+		return "the NBT of file from file " + input.toString(e, false);
+	}
+
+	@Override
+	@Nullable
+	protected NBTTagCompound[] get(Event e) {
+		NBTTagCompound NBT = null;
+		File file = new File(input.getSingle(e));
+		if (file.exists()) {
+			try {
+				InputStream fis = new FileInputStream(file);
+				NBT = NBTCompressedStreamTools.a(fis);
+				fis.close();
+			} catch (EOFException ex) {
+				//End of file, no error.
+			} catch (ZipException ex) {
+				return null; //Not a valid file (not compressed in GZIP format)
+			} catch (IOException ex) {
+				ex.printStackTrace();
+			}
+		} else {
+			return null; // Specified file doesn't exist
+		}
+		return new NBTTagCompound[] { NBT };
+	}
+
+	@Override
+	public void change(Event e, @Nullable Object[] delta, ChangeMode mode) {
+		File file = new File(input.getSingle(e));
+		String tags = (String) delta[0];
+		if (mode == ChangeMode.ADD) {
+			try {
+				InputStream fis = new FileInputStream(file);
+				NBTTagCompound NBT = NBTCompressedStreamTools.a(fis);
+				OutputStream os = new FileOutputStream(file);
+				NBTTagCompound NBT1 = MojangsonParser.parse(tags);
+				NBT.a(NBT1);
+				NBTCompressedStreamTools.a(NBT, os);
+				fis.close();
+				os.close();
+			} catch (EOFException ex) {
+				//End of file, no error.
+			} catch (ZipException ex) {
+				return; //Not a valid file (not compressed in GZIP format)
+			} catch (IOException ex) {
+				ex.printStackTrace();
+			} catch (MojangsonParseException ex) {
+				Skript.warning("Error when parsing NBT - " + ex.getMessage());
+			}
+		} else if (mode == ChangeMode.REMOVE) {
+			try {
+				InputStream fis = new FileInputStream(file);
+				NBTTagCompound NBT = NBTCompressedStreamTools.a(fis);
+				OutputStream os = new FileOutputStream(file);
+				NBT.remove(tags);
+				NBTCompressedStreamTools.a(NBT, os);
+				fis.close();
+				os.close();
+			} catch (EOFException ex) {
+				//End of file, no error.
+			} catch (ZipException ex) {
+				return; //Not a valid file (not compressed in GZIP format)
+			} catch (IOException ex) {
+				ex.printStackTrace();
+			}
+		}
+	}
+
+	@SuppressWarnings("unchecked")
+	@Override
+	@Nullable
+	public Class<?>[] acceptChange(ChangeMode mode) {
+		if (mode == ChangeMode.ADD || mode == ChangeMode.REMOVE) {
+			return CollectionUtils.array(String.class);
+		}
+		return null;
+	}
+}

src/me/TheBukor/expressions/ExprFileNBTv1_8_R3.java

@@ -0,0 +1,127 @@
+package me.TheBukor.expressions;
+
+import java.io.EOFException;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.zip.ZipException;
+
+import javax.annotation.Nullable;
+
+import org.bukkit.event.Event;
+
+import ch.njol.skript.Skript;
+import ch.njol.skript.classes.Changer.ChangeMode;
+import ch.njol.skript.lang.Expression;
+import ch.njol.skript.lang.SkriptParser.ParseResult;
+import ch.njol.skript.lang.util.SimpleExpression;
+import ch.njol.util.Kleenean;
+import ch.njol.util.coll.CollectionUtils;
+import net.minecraft.server.v1_8_R3.MojangsonParseException;
+import net.minecraft.server.v1_8_R3.MojangsonParser;
+import net.minecraft.server.v1_8_R3.NBTCompressedStreamTools;
+import net.minecraft.server.v1_8_R3.NBTTagCompound;
+
+public class ExprFileNBTv1_8_R3 extends SimpleExpression<NBTTagCompound> {
+	private Expression<String> input;
+
+	@Override
+	public Class<? extends NBTTagCompound> getReturnType() {
+		return NBTTagCompound.class;
+	}
+
+	@Override
+	public boolean isSingle() {
+		return true;
+	}
+
+	@SuppressWarnings("unchecked")
+	@Override
+	public boolean init(Expression<?>[] expr, int matchedPattern, Kleenean arg2, ParseResult arg3) {
+		input = (Expression<String>) expr[0];
+		return true;
+	}
+
+	@Override
+	public String toString(@Nullable Event e, boolean arg1) {
+		return "the NBT of file from file " + input.toString(e, false);
+	}
+
+	@Override
+	@Nullable
+	protected NBTTagCompound[] get(Event e) {
+		NBTTagCompound NBT = null;
+		File file = new File(input.getSingle(e));
+		if (file.exists()) {
+			try {
+				InputStream fis = new FileInputStream(file);
+				NBT = NBTCompressedStreamTools.a(fis);
+				fis.close();
+			} catch (EOFException ex) {
+				//End of file, no error.
+			} catch (ZipException ex) {
+				return null; //Not a valid file (not compressed in GZIP format)
+			} catch (IOException ex) {
+				ex.printStackTrace();
+			}
+		} else {
+			return null; // Specified file doesn't exist
+		}
+		return new NBTTagCompound[] { NBT };
+	}
+
+	@Override
+	public void change(Event e, @Nullable Object[] delta, ChangeMode mode) {
+		File file = new File(input.getSingle(e));
+		String tags = (String) delta[0];
+		if (mode == ChangeMode.ADD) {
+			try {
+				InputStream fis = new FileInputStream(file);
+				NBTTagCompound NBT = NBTCompressedStreamTools.a(fis);
+				OutputStream os = new FileOutputStream(file);
+				NBTTagCompound NBT1 = MojangsonParser.parse(tags);
+				NBT.a(NBT1);
+				NBTCompressedStreamTools.a(NBT, os);
+				fis.close();
+				os.close();
+			} catch (EOFException ex) {
+				//End of file, no error.
+			} catch (ZipException ex) {
+				return; //Not a valid file (not compressed in GZIP format)
+			} catch (IOException ex) {
+				ex.printStackTrace();
+			} catch (MojangsonParseException ex) {
+				Skript.warning("Error when parsing NBT - " + ex.getMessage());
+			}
+		} else if (mode == ChangeMode.REMOVE) {
+			try {
+				InputStream fis = new FileInputStream(file);
+				NBTTagCompound NBT = NBTCompressedStreamTools.a(fis);
+				OutputStream os = new FileOutputStream(file);
+				NBT.remove(tags);
+				NBTCompressedStreamTools.a(NBT, os);
+				fis.close();
+				os.close();
+			} catch (EOFException ex) {
+				//End of file, no error.
+			} catch (ZipException ex) {
+				return; //Not a valid file (not compressed in GZIP format)
+			} catch (IOException ex) {
+				ex.printStackTrace();
+			}
+		}
+	}
+
+	@SuppressWarnings("unchecked")
+	@Override
+	@Nullable
+	public Class<?>[] acceptChange(ChangeMode mode) {
+		if (mode == ChangeMode.ADD || mode == ChangeMode.REMOVE) {
+			return CollectionUtils.array(String.class);
+		}
+		return null;
+	}
+}