port to fabric

.gitignore

@@ -0,0 +1,21 @@
+#Gradle
+.gradle/
+build/
+out/
+classes/
+
+#IDEA
+.idea/
+*.iml
+*.ipr
+*.iws
+
+#vscode
+.settings/
+.vscode/
+bin/
+.classpath
+.project
+
+#fabric
+run/

LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2020 QuImUfu
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

build.gradle

@@ -0,0 +1,79 @@
+plugins {
+	id 'fabric-loom' version '0.2.6-SNAPSHOT'
+	id 'maven-publish'
+}
+
+sourceCompatibility = JavaVersion.VERSION_1_8
+targetCompatibility = JavaVersion.VERSION_1_8
+
+archivesBaseName = project.archives_base_name
+version = project.mod_version
+group = project.maven_group
+
+minecraft {
+}
+
+dependencies {
+	//to change the versions see the gradle.properties file
+	minecraft "com.mojang:minecraft:${project.minecraft_version}"
+	mappings "net.fabricmc:yarn:${project.yarn_mappings}:v2"
+	modImplementation "net.fabricmc:fabric-loader:${project.loader_version}"
+
+	modImplementation "net.fabricmc.fabric-api:fabric-api:${project.fabric_api_version}"
+}
+
+processResources {
+	inputs.property "version", project.version
+
+	from(sourceSets.main.resources.srcDirs) {
+		include "fabric.mod.json"
+		expand "version": project.version
+	}
+
+	from(sourceSets.main.resources.srcDirs) {
+		exclude "fabric.mod.json"
+	}
+}
+
+// ensure that the encoding is set to UTF-8, no matter what the system default is
+// this fixes some edge cases with special characters not displaying correctly
+// see http://yodaconditions.net/blog/fix-for-java-file-encoding-problems-with-gradle.html
+tasks.withType(JavaCompile) {
+	options.encoding = "UTF-8"
+}
+
+// Loom will automatically attach sourcesJar to a RemapSourcesJar task and to the "build" task
+// if it is present.
+// If you remove this task, sources will not be generated.
+task sourcesJar(type: Jar, dependsOn: classes) {
+	classifier = "sources"
+	from sourceSets.main.allSource
+}
+
+jar {
+	from "LICENSE"
+}
+
+// configure the maven publication
+publishing {
+	publications {
+		mavenJava(MavenPublication) {
+			// add all the jars that should be included when publishing to maven
+			artifact(jar) {
+				builtBy remapJar
+			}
+			artifact("${project.buildDir.absolutePath}/libs/${archivesBaseName}-${project.version}.jar"){
+				builtBy remapJar
+			}
+			artifact(sourcesJar) {
+				builtBy remapSourcesJar
+			}
+		}
+	}
+
+	// select the repositories you want to publish to
+	repositories {
+		// uncomment to publish to the local maven
+		// mavenLocal()
+	}
+}

gradle.properties

@@ -0,0 +1,14 @@
+org.gradle.jvmargs  = -Xmx1G
+
+#Fabric properties
+minecraft_version   = 1.15.2
+yarn_mappings       = 1.15.2+build.15
+loader_version      = 0.8.2+build.194
+
+#Mod properties
+mod_version         = 0.7.0
+maven_group         = quimufu.structure_item
+archives_base_name  = structure_item
+
+#Dependencies
+fabric_api_version  = 0.5.1+build.294-1.15

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.5.1-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,188 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,100 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle

@@ -0,0 +1,10 @@
+pluginManagement {
+    repositories {
+        jcenter()
+        maven {
+            name = 'Fabric'
+            url = 'https://maven.fabricmc.net/'
+        }
+        gradlePluginPortal()
+    }
+}

src/main/java/quimufu/structure_item/MyItem.java

@@ -0,0 +1,247 @@
+package quimufu.structure_item;
+
+import com.google.common.collect.Lists;
+import com.mojang.datafixers.Dynamic;
+import net.minecraft.block.Block;
+import net.minecraft.client.item.TooltipContext;
+import net.minecraft.datafixer.NbtOps;
+import net.minecraft.item.Item;
+import net.minecraft.item.ItemGroup;
+import net.minecraft.item.ItemStack;
+import net.minecraft.item.ItemUsageContext;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.nbt.ListTag;
+import net.minecraft.nbt.Tag;
+import net.minecraft.network.MessageType;
+import net.minecraft.network.packet.s2c.play.TitleS2CPacket;
+import net.minecraft.server.network.ServerPlayNetworkHandler;
+import net.minecraft.server.network.ServerPlayerEntity;
+import net.minecraft.server.world.ServerWorld;
+import net.minecraft.structure.Structure;
+import net.minecraft.text.LiteralText;
+import net.minecraft.text.Text;
+import net.minecraft.text.TranslatableText;
+import net.minecraft.util.*;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Direction;
+import net.minecraft.util.registry.DefaultedRegistry;
+import net.minecraft.util.registry.Registry;
+import net.minecraft.world.World;
+
+import java.util.List;
+
+import static quimufu.structure_item.StructureItemMod.LOGGER;
+
+public class MyItem extends Item {
+    static Item.Settings p = (new Item.Settings()).group(ItemGroup.REDSTONE).maxCount(1);
+
+    public MyItem() {
+        super(p);
+
+    }
+
+    @Override
+    public void appendTooltip(ItemStack itemStack, World world, List<Text> texts, TooltipContext tooltipFlag) {
+        if (!itemStack.hasTag() || !itemStack.getTag().contains("structure", 8)) {
+            texts.add((new TranslatableText("item.structure_item.item.tooltip.tag.invalid")).formatted(Formatting.RED));
+        } else {
+            CompoundTag tag = itemStack.getTag();
+            if (tooltipFlag.isAdvanced()) {
+                texts.add(new TranslatableText("item.structure_item.item.tooltip.structure"));
+                texts.add(new LiteralText("  " + tag.getString("structure")));
+                if (tag.contains("allowedOn", 8)) {
+                    texts.add(new TranslatableText("item.structure_item.item.tooltip.allowed.on"));
+                    texts.add(new LiteralText("  " + tag.getString("allowedOn")));
+                }
+                if (tag.contains("offset")) {
+                    BlockPos offset = BlockPos.deserialize(new Dynamic<Tag>(NbtOps.INSTANCE, tag.get("offset")));
+                    texts.add(new TranslatableText("item.structure_item.item.tooltip.fixed.offset"));
+                    Text c = new TranslatableText("item.structure_item.item.tooltip.xyz",
+                            new LiteralText(String.valueOf(offset.getX())),
+                            new LiteralText(String.valueOf(offset.getY())),
+                            new LiteralText(String.valueOf(offset.getZ())));
+                    texts.add(c);
+                } else {
+                    texts.add(new TranslatableText("item.structure_item.item.tooltip.dynamic.offset"));
+                }
+                if (tag.contains("blacklist", 9)) {
+                    texts.add(new TranslatableText("item.structure_item.item.tooltip.blacklist"));
+                    ListTag bl = tag.getList("blacklist", 8);
+                    int i = 0;
+                    for ( Tag entry : bl) {
+                        texts.add(new LiteralText("  " + entry.asString()));
+                        i++;
+                        if (i == 4) {
+                            texts.add(new TranslatableText("item.structure_item.item.tooltip.blacklist.more",
+                                    new LiteralText(String.valueOf(bl.size() - i))));
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    @Override
+    public ActionResult useOnBlock(ItemUsageContext c) {
+        if (!c.getWorld().isClient) {
+            ServerPlayerEntity player;
+            if (c.getPlayer() instanceof ServerPlayerEntity) {
+                player = ((ServerPlayerEntity) c.getPlayer());
+            } else {
+                player = null;
+            }
+            CompoundTag tag = c.getStack().getTag();
+            if (tag == null) {
+                TranslatableText message =
+                        new TranslatableText("items.structure.spawner.no.tag");
+                sendPlayerChat(player, message);
+                return ActionResult.FAIL;
+            }
+            Block allowed = null;
+            if (tag.contains("allowedOn", 8)) {
+                String allowedOn = tag.getString("allowedOn");
+                allowed = getBlock(allowedOn);
+                if (allowed == null) {
+                    TranslatableText message =
+                            new TranslatableText("items.structure.spawner.invalid.block",
+                                    new LiteralText(allowedOn));
+                    sendPlayerChat(player, message);
+                    return ActionResult.FAIL;
+                }
+            }
+            Block current = c.getWorld().getBlockState(c.getBlockPos()).getBlock();
+            if (allowed != null && !current.equals(allowed)) {
+                TranslatableText message =
+                        new TranslatableText("items.structure.spawner.invalid.block.clicked",
+                                current.getName(), allowed.getName());
+                sendPlayer(player, message);
+                return ActionResult.FAIL;
+            }
+            if (!tag.contains("structure", 8)) {
+                LOGGER.info("No structure name set");
+                TranslatableText message =
+                        new TranslatableText("items.structure.spawner.no.structure");
+                sendPlayerChat(player, message);
+                return ActionResult.FAIL;
+            }
+            String structureName = tag.getString("structure");
+            Identifier structureResourceID = Identifier.tryParse(structureName);
+            if (structureResourceID == null) {
+                TranslatableText message =
+                        new TranslatableText("items.structure.spawner.invalid.structure.name");
+                sendPlayerChat(player, message);
+                return ActionResult.FAIL;
+            }
+            Structure x = ((ServerWorld) c.getWorld()).getStructureManager().getStructure(structureResourceID);
+            if (x == null) {
+                TranslatableText message =
+                        new TranslatableText("items.structure.spawner.structure.nonexistent",
+                                new LiteralText(structureResourceID.toString()));
+                sendPlayerChat(player, message);
+                return ActionResult.FAIL;
+            }
+
+            BlockPos loc = c.getBlockPos().offset(c.getSide());
+            if (tag.contains("offset")) {
+                BlockPos offset = BlockPos.deserialize(new Dynamic<Tag>(NbtOps.INSTANCE, tag.get("offset")));
+                loc = loc.add(offset);
+            } else if (c.getPlayer() != null) {
+                Direction direction = Direction.getEntityFacingOrder(c.getPlayer())[0];
+                BlockPos size = x.getSize();
+                loc = loc.add(getDirectionalOffset(direction, size));
+            } else {
+                LOGGER.info("No player & no offset");
+            }
+
+            MyPlacementSettings ps = (new MyPlacementSettings());
+            if (tag.contains("blacklist", 9)) {
+                ListTag bl = tag.getList("blacklist", 8);
+                List<Block> blacklist = Lists.newArrayList();
+                for (Tag b : bl) {
+                    Block block = getBlock(b.asString());
+                    if (block != null) {
+                        blacklist.add(block);
+                    } else {
+                        TranslatableText message =
+                                new TranslatableText("items.structure.spawner.invalid.block",
+                                        new LiteralText(b.asString()));
+                        sendPlayerChat(player, message);
+                    }
+
+                }
+                ps.forbidOverwrite(blacklist);
+            }
+            ps.setWorld(c.getWorld())
+                    .setSize(x.getSize())
+                    .setMirrored(BlockMirror.NONE)
+                    .setRotation(BlockRotation.NONE)
+                    .setChunkPosition(null);
+            boolean succes = x.method_15172(c.getWorld(), loc, ps, 2);
+            if (succes) {
+                c.getStack().decrement(1);
+                return ActionResult.SUCCESS;
+            }
+            TranslatableText message =
+                    new TranslatableText("items.structure.spawner.invalid.location");
+            sendPlayer(player, message);
+            return ActionResult.FAIL;
+        }
+        return ActionResult.FAIL;
+    }
+
+    private static void sendPlayer(ServerPlayerEntity player, Text message) {
+        if (player == null)
+            return;
+        ServerPlayNetworkHandler connection = player.networkHandler;
+        TitleS2CPacket packet = new TitleS2CPacket(TitleS2CPacket.Action.SUBTITLE, message);
+        connection.sendPacket(packet);
+        packet = new TitleS2CPacket(TitleS2CPacket.Action.TITLE, new LiteralText(""));
+        connection.sendPacket(packet);
+    }
+
+    private static void sendPlayerChat(ServerPlayerEntity player, Text message) {
+        if (player != null)
+            player.sendChatMessage(message, MessageType.SYSTEM);
+        LOGGER.info(message.asFormattedString());
+    }
+
+    private BlockPos getDirectionalOffset(Direction direction, BlockPos size) {
+        BlockPos loc = new BlockPos(0, 0, 0);
+        switch (direction) {
+            case WEST:
+                loc = loc.offset(Direction.NORTH, size.getZ() / 2);
+                loc = loc.offset(Direction.WEST, size.getX() - 1);
+                break;
+            case EAST: //positive x
+                loc = loc.offset(Direction.NORTH, size.getZ() / 2);
+                break;
+            case NORTH:
+                loc = loc.offset(Direction.NORTH, size.getZ() - 1);
+                loc = loc.offset(Direction.WEST, size.getX() / 2);
+                break;
+            case SOUTH: //positive z
+                loc = loc.offset(Direction.WEST, size.getX() / 2);
+                break;
+            case UP:    //positive y
+                loc = loc.offset(Direction.NORTH, size.getZ() / 2);
+                loc = loc.offset(Direction.WEST, size.getX() / 2);
+                loc = loc.offset(Direction.UP);
+                break;
+            case DOWN:
+                loc = loc.offset(Direction.NORTH, size.getZ() / 2);
+                loc = loc.offset(Direction.WEST, size.getX() / 2);
+                loc = loc.offset(Direction.DOWN, size.getY());
+                break;
+        }
+        return loc;
+    }
+
+    private Block getBlock(String loc) {
+        Identifier location = Identifier.tryParse(loc);
+        DefaultedRegistry<Block> blocks = Registry.BLOCK;
+        if (location == null || !blocks.containsId(location)) {
+            return null;
+        }
+        return blocks.get(location);
+    }
+}

src/main/java/quimufu/structure_item/MyPlacementSettings.java

@@ -0,0 +1,88 @@
+package quimufu.structure_item;
+
+import com.google.common.collect.Lists;
+import net.minecraft.block.Block;
+import net.minecraft.entity.Entity;
+import net.minecraft.structure.Structure;
+import net.minecraft.structure.StructurePlacementData;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Box;
+import net.minecraft.util.math.Vec3d;
+import net.minecraft.world.World;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class MyPlacementSettings extends StructurePlacementData {
+    private List<Block> blacklist;
+    private World world;
+    private BlockPos size;
+
+    public MyPlacementSettings forbidOverwrite(List<Block> blocks) {
+        if (blocks.size() == 0) {
+            blacklist = null;
+            return this;
+        }
+        blacklist = Lists.newArrayList(blocks);
+        return this;
+    }
+
+    public MyPlacementSettings setWorld(World w) {
+        world = w;
+        return this;
+    }
+
+    public MyPlacementSettings setSize(BlockPos p) {
+        size = p;
+        return this;
+    }
+
+    @Override
+    public List<Structure.StructureBlockInfo> method_15121(List<List<Structure.StructureBlockInfo>> blocks, BlockPos pos) {
+        if (world == null || pos == null || size == null) {
+            return super.method_15121(blocks, pos);
+        }
+
+        List<List<Structure.StructureBlockInfo>> eligibleStructures = new ArrayList<>();
+        if (blacklist == null) {
+            eligibleStructures = blocks;
+        } else {
+            for (List<Structure.StructureBlockInfo> struct : blocks) {
+                if (isValid(struct, pos)) {
+                    eligibleStructures.add(struct);
+                }
+            }
+        }
+        if (eligibleStructures.size() == 0)
+            setIgnoreEntities(true);
+        List<Structure.StructureBlockInfo> locs = super.method_15121(eligibleStructures, pos);
+        if (!locs.isEmpty()) {
+            List<Entity> entitiesWithinAABB = world.getNonSpectatingEntities(Entity.class, new Box(pos,pos.add(size)));
+            for (Structure.StructureBlockInfo blockInfo : locs) {
+                BlockPos posToClean = blockInfo.pos.add(pos);
+                for (Entity e : entitiesWithinAABB) {
+                    e.getBoundingBox().contains(new Vec3d(posToClean));
+                    if (e.getBoundingBox().intersects(new Box(posToClean))) {
+                        e.remove();
+                    }
+                }
+            }
+        }
+        return locs;
+    }
+
+    private boolean isValid(List<Structure.StructureBlockInfo> struct, BlockPos pos) {
+        for (Structure.StructureBlockInfo bi : struct) {
+            BlockPos posToCheck = bi.pos.add(pos);
+            if (World.isValid(posToCheck)) {
+                Block blockToCheck = world.getBlockState(posToCheck).getBlock();
+                for (Block b : blacklist) {
+                    if (blockToCheck.equals(b)) {
+                        return false;
+                    }
+                }
+            }
+        }
+        return true;
+    }
+}

src/main/java/quimufu/structure_item/StructureItemMod.java

@@ -0,0 +1,29 @@
+package quimufu.structure_item;
+
+import net.fabricmc.api.ModInitializer;
+import net.minecraft.item.Item;
+import net.minecraft.util.registry.Registry;
+import org.apache.logging.log4j.Level;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+
+public class StructureItemMod implements ModInitializer {
+
+    public static Logger LOGGER = LogManager.getLogger();
+
+    public static final String MOD_ID = "structure_item";
+    public static final String MOD_NAME = "Structure Item Mod (Fabric)";
+    public static final Item item = new MyItem();
+
+    @Override
+    public void onInitialize() {
+        log(Level.INFO, "Initializing");
+        Registry.register(Registry.ITEM, MOD_ID + ":item", item);
+    }
+
+    public static void log(Level level, String message) {
+        LOGGER.log(level, "[" + MOD_NAME + "] " + message);
+    }
+
+}

src/main/resources/assets/structure_item/lang/en_us.json

@@ -0,0 +1,18 @@
+{
+  "items.structure.spawner.invalid.block.clicked": "Digga %s is net %s, maan.",
+  "items.structure.spawner.invalid.location": "An irreplaceable block is in the way!",
+  "items.structure.spawner.invalid.structure.name": "Invalid structure name",
+  "items.structure.spawner.structure.nonexistent": "Structure: %s does not exist",
+  "items.structure.spawner.invalid.block": "Block %s invalid",
+  "items.structure.spawner.no.tag": "Item has no NBT tag",
+  "items.structure.spawner.no.structure": "Item has no String \"structure\": tag",
+  "item.structure_item.item": "Structure Spawner",
+  "item.structure_item.item.tooltip.tag.invalid": "Invalid item!",
+  "item.structure_item.item.tooltip.structure": "Places down: ",
+  "item.structure_item.item.tooltip.allowed.on": "Can be placed on: ",
+  "item.structure_item.item.tooltip.fixed.offset": "Offset:",
+  "item.structure_item.item.tooltip.xyz":"  x: %s y: %s z: %s",
+  "item.structure_item.item.tooltip.dynamic.offset": "Dynamic offset",
+  "item.structure_item.item.tooltip.blacklist": "Blacklist:",
+  "item.structure_item.item.tooltip.blacklist.more": "  And %s more..."
+}

src/main/resources/assets/structure_item/models/item/item.json

@@ -0,0 +1,6 @@
+{
+    "parent": "item/handheld",
+    "textures": {
+        "layer0": "item/stick"
+    }
+}

src/main/resources/fabric.mod.json

@@ -0,0 +1,27 @@
+{
+  "schemaVersion": 1,
+  "id": "structure_item",
+  "version": "${version}",
+  "name": "Structure Item Mod (Fabric)",
+  "description": "This mod adds an item, that, with proper NBT might help you build a modpack... maybe",
+  "authors": [
+    "QuImUfu"
+  ],
+  "contributors": [],
+  "contact": {},
+  "license": "MIT",
+  "icon": "assets/structure_item/icon.png",
+  "environment": "*",
+  "entrypoints": {
+    "main": [
+      "quimufu.structure_item.StructureItemMod"
+    ],
+    "client": [],
+    "server": []
+  },
+  "mixins": [],
+  "depends": {
+    "fabricloader": ">=0.4.0",
+    "fabric": "*"
+  }
+}