Initial commit

.gitattributes

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+#
+# https://help.github.com/articles/dealing-with-line-endings/
+#
+# These are explicitly windows files and should use crlf
+*.bat           text eol=crlf
+

.gitignore

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+# Ignore Gradle project-specific cache directory
+.gradle
+
+gradle
+gradlew
+gradlew.bat
+
+.classpath
+.project
+.settings
+*.launch
+
+# Ignore Gradle build output directory
+build
+bin
+run

build.gradle

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+plugins {
+	id 'fabric-loom' version '0.7-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
+
+repositories {
+	// Add repositories to retrieve artifacts from in here.
+	// You should only use this when depending on other mods because
+	// Loom adds the essential maven repositories to download Minecraft and libraries from automatically.
+	// See https://docs.gradle.org/current/userguide/declaring_repositories.html
+	// for more information about repositories.
+}
+
+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:${project.loader_version}"
+
+	// Fabric API. This is technically optional, but you probably want it anyway.
+	modImplementation "net.fabricmc.fabric-api:fabric-api:${project.fabric_version}"
+
+	modImplementation "com.google.zxing:javase:${project.zxing_version}"
+	include "com.google.zxing:javase:${project.zxing_version}"
+	include "com.google.zxing:core:${project.zxing_version}"
+}
+
+processResources {
+	inputs.property "version", project.version
+
+	filesMatching("fabric.mod.json") {
+		expand "version": project.version
+	}
+}
+
+tasks.withType(JavaCompile).configureEach {
+	// ensure that the encoding is set to UTF-8, no matter what the system default is
+	// this fixes some edge cases with special characters not displaying correctly
+	// see http://yodaconditions.net/blog/fix-for-java-file-encoding-problems-with-gradle.html
+	// If Javadoc is generated, this must be specified in that task too.
+	it.options.encoding = "UTF-8"
+
+	// The Minecraft launcher currently installs Java 8 for users, so your mod probably wants to target Java 8 too
+	// JDK 9 introduced a new way of specifying this that will make sure no newer classes or methods are used.
+	// We'll use that if it's available, but otherwise we'll use the older option.
+	def targetVersion = 8
+	if (JavaVersion.current().isJava9Compatible()) {
+		 it.options.release = targetVersion
+	}
+}
+
+java {
+	// Loom will automatically attach sourcesJar to a RemapSourcesJar task and to the "build" task
+	// if it is present.
+	// If you remove this line, sources will not be generated.
+	withSourcesJar()
+}
+
+jar {
+	from("LICENSE") {
+		rename { "${it}_${project.archivesBaseName}"}
+	}
+}
+
+// configure the maven publication
+publishing {
+	publications {
+		mavenJava(MavenPublication) {
+			// add all the jars that should be included when publishing to maven
+			artifact(remapJar) {
+				builtBy remapJar
+			}
+			artifact(sourcesJar) {
+				builtBy remapSourcesJar
+			}
+		}
+	}
+
+	// See https://docs.gradle.org/current/userguide/publishing_maven.html for information on how to set up publishing.
+	repositories {
+		// Add repositories to publish to here.
+		// Notice: This block does NOT have the same function as the block in the top level.
+		// The repositories here will be used for publishing your artifact, not for
+		// retrieving dependencies.
+	}
+}

gradle.properties

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+# Done to increase the memory available to gradle.
+org.gradle.jvmargs=-Xmx1G
+
+# Fabric Properties
+	# check these on https://fabricmc.net/versions.html
+	minecraft_version=1.16.5
+	yarn_mappings=1.16.5+build.9
+	loader_version=0.11.3
+
+# Mod Properties
+	mod_version = 0.1
+	maven_group = de.rangun
+	archives_base_name = pandacrossing
+
+# Dependencies
+	# currently not on the main fabric site, check on the maven: https://maven.fabricmc.net/net/fabricmc/fabric-api/fabric-api (or https://fabricmc.net/versions.html)
+	fabric_version=0.34.2+1.16
+	zxing_version=3.4.1

settings.gradle

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+pluginManagement {
+    repositories {
+        maven {
+            name = 'Fabric'
+            url = 'https://maven.fabricmc.net/'
+        }
+        gradlePluginPortal()
+    }
+}

src/main/java/de/rangun/pandacrossing/PandaCrossingMod.java

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+/*
+ * Copyright 2021 by Heiko Schäfer <[email protected]>
+ *
+ * This file is part of PandaCrossing.
+ *
+ * PandaCrossing 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, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * PandaCrossing 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 PandaCrossing.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package de.rangun.pandacrossing;
+
+import static com.mojang.brigadier.arguments.StringArgumentType.getString;
+import static com.mojang.brigadier.arguments.StringArgumentType.greedyString;
+import static net.minecraft.server.command.CommandManager.argument;
+import static net.minecraft.server.command.CommandManager.literal;
+
+import java.io.UnsupportedEncodingException;
+import java.nio.charset.StandardCharsets;
+import java.util.HashMap;
+import java.util.Map;
+
+import com.google.zxing.BarcodeFormat;
+import com.google.zxing.EncodeHintType;
+import com.google.zxing.WriterException;
+import com.google.zxing.common.BitMatrix;
+import com.google.zxing.qrcode.QRCodeWriter;
+import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
+
+import net.fabricmc.api.ModInitializer;
+import net.fabricmc.fabric.api.command.v1.CommandRegistrationCallback;
+import net.minecraft.block.Blocks;
+import net.minecraft.server.network.ServerPlayerEntity;
+import net.minecraft.text.LiteralText;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Vec3d;
+import net.minecraft.world.World;
+
+public class PandaCrossingMod implements ModInitializer {
+
+	private interface IBlockPlacer {
+		void placeBlock(int x, int y, boolean b);
+	};
+
+	private static void createQRCode(IBlockPlacer bp, String qrCodeData, int qrCodeheight, int qrCodewidth)
+			throws WriterException, UnsupportedEncodingException {
+
+		@SuppressWarnings("rawtypes")
+		final Map<EncodeHintType, Comparable> hintMap = new HashMap<EncodeHintType, Comparable>();
+
+		hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.Q);
+		hintMap.put(EncodeHintType.MARGIN, 1);
+
+		final BitMatrix matrix = new QRCodeWriter().encode(
+				new String(qrCodeData.getBytes(StandardCharsets.UTF_8), StandardCharsets.UTF_8), BarcodeFormat.QR_CODE,
+				qrCodewidth, qrCodeheight, hintMap);
+
+		for (int y = 0; y < matrix.getHeight(); ++y) {
+			for (int x = 0; x < matrix.getWidth(); ++x) {
+				bp.placeBlock(x, y, matrix.get(x, y));
+			}
+		}
+	}
+
+	@Override
+	public void onInitialize() {
+
+		CommandRegistrationCallback.EVENT.register((dispatcher, dedicated) -> {
+			dispatcher.register(literal("qr").then(argument("text", greedyString()).executes(ctx -> {
+
+				final String txt = getString(ctx, "text");
+				final ServerPlayerEntity player = ctx.getSource().getPlayer();
+				final World world = player.getServerWorld();
+				final Vec3d playerPos = player.getPos();
+				final BlockPos curPos = new BlockPos(playerPos.getX(), playerPos.getY() - 1.0d, playerPos.getZ());
+
+				try {
+
+					createQRCode(new IBlockPlacer() {
+
+						@Override
+						public void placeBlock(int x, int y, boolean b) {
+
+							world.setBlockState(curPos.add(x, 0, y), b ? Blocks.BLACK_CONCRETE.getDefaultState()
+									: Blocks.WHITE_CONCRETE.getDefaultState());
+						}
+
+					}, txt, 21, 21);
+
+				} catch (Exception e) {
+					e.printStackTrace();
+				}
+
+				return 1;
+			})).executes(ctx -> {
+				ctx.getSource().sendFeedback(new LiteralText("Some usage"), false);
+
+				return 1;
+			}));
+		});
+	}
+}

src/main/resources/fabric.mod.json

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+{
+  "schemaVersion": 1,
+  "id": "panda_crossing",
+  "version": "${version}",
+
+  "name": "Panda Crossing QR Generator",
+  "description": "Creates QR codes",
+  "authors": [
+    "Velnias75"
+  ],
+  "contact": {
+    "discord": "https://discord.me/agoramc",
+    "sources": "https://github.com/FabricMC/fabric-example-mod"
+  },
+
+  "license": "GPL-3.0-or-later",
+  "icon": "assets/panda_crossing/icon.png",
+
+  "environment": "*",
+  "entrypoints": {
+    "main": [
+      "de.rangun.pandacrossing.PandaCrossingMod"
+    ]
+  },
+  "mixins": [
+  ],
+
+  "depends": {
+    "fabricloader": ">=0.7.4",
+    "fabric": "*",
+    "minecraft": "1.16.x"
+  },
+  "suggests": {
+    "another-mod": "*"
+  }
+}