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hyperdefinedhyperdefined
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added code
barely tested it, will finish later
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‎.gitignore‎

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# User-specific stuff
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.idea/
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*.iml
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*.ipr
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*.iws
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# IntelliJ
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out/
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# Compiled class file
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*.class
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# Log file
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*.log
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# BlueJ files
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*.ctxt
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# Package Files #
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*.jar
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*.war
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*.nar
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*.ear
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*.zip
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*.tar.gz
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*.rar
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# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
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hs_err_pid*
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*~
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# temporary files which can be created if a process still has a handle open of a deleted file
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.fuse_hidden*
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# KDE directory preferences
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.directory
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# Linux trash folder which might appear on any partition or disk
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.Trash-*
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# .nfs files are created when an open file is removed but is still being accessed
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.nfs*
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# General
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.DS_Store
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.AppleDouble
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.LSOverride
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# Icon must end with two \r
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Icon
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# Thumbnails
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._*
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# Files that might appear in the root of a volume
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.DocumentRevisions-V100
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.fseventsd
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.Spotlight-V100
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.TemporaryItems
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.Trashes
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.VolumeIcon.icns
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.com.apple.timemachine.donotpresent
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# Directories potentially created on remote AFP share
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.AppleDB
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.AppleDesktop
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Network Trash Folder
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Temporary Items
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.apdisk
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# Windows thumbnail cache files
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Thumbs.db
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Thumbs.db:encryptable
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ehthumbs.db
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ehthumbs_vista.db
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# Dump file
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*.stackdump
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# Folder config file
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[Dd]esktop.ini
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# Recycle Bin used on file shares
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$RECYCLE.BIN/
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# Windows Installer files
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*.cab
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*.msi
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*.msix
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*.msm
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*.msp
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# Windows shortcuts
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*.lnk
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target/
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pom.xml.tag
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pom.xml.releaseBackup
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pom.xml.versionsBackup
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pom.xml.next
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release.properties
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dependency-reduced-pom.xml
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buildNumber.properties
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.mvn/timing.properties
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.mvn/wrapper/maven-wrapper.jar
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.flattened-pom.xml
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# Common working directory
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run/

‎pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>lol.hyper</groupId>
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<artifactId>velocityblockversion</artifactId>
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<version>1.0</version>
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<packaging>jar</packaging>
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<name>VelocityBlockVersion</name>
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<properties>
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<java.version>1.8</java.version>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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</properties>
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<build>
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<resources>
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<resource>
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<directory>src/main/resources</directory>
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<filtering>true</filtering>
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</resource>
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</resources>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>3.8.1</version>
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<configuration>
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<source>${java.version}</source>
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<target>${java.version}</target>
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</configuration>
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</plugin>
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<plugin>
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<groupId>org.codehaus.mojo</groupId>
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<artifactId>templating-maven-plugin</artifactId>
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<version>1.0.0</version>
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<executions>
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<execution>
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<id>filter-src</id>
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<goals>
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<goal>filter-sources</goal>
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</goals>
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</execution>
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</executions>
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</plugin>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-shade-plugin</artifactId>
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<version>3.2.4</version>
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<configuration>
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<relocations>
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<relocation>
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<pattern>org.bstats</pattern>
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<!-- Replace this with your package! -->
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<shadedPattern>lol.hyper.velocityblockversion.bstats</shadedPattern>
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</relocation>
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</relocations>
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</configuration>
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<executions>
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<execution>
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<phase>package</phase>
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<goals>
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<goal>shade</goal>
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</goals>
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</execution>
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</executions>
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</plugin>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-site-plugin</artifactId>
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<version>3.9.1</version>
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<dependencies>
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<dependency>
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<groupId>net.trajano.wagon</groupId>
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<artifactId>wagon-git</artifactId>
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<version>2.0.4</version>
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</dependency>
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<dependency>
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<groupId>org.apache.maven.doxia</groupId>
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<artifactId>doxia-module-markdown</artifactId>
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<version>1.9.1</version>
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</dependency>
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</dependencies>
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</plugin>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-release-plugin</artifactId>
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<version>3.0.0-M1</version>
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<configuration>
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<autoVersionSubmodules>true</autoVersionSubmodules>
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<tagNameFormat>@{project.version}</tagNameFormat>
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<scmCommentPrefix xml:space="preserve">[RELEASE] </scmCommentPrefix>
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<goals>install deploy site-deploy
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</goals> <!-- install is here to fix javadoc generation in multi-module projects -->
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<releaseProfiles>release</releaseProfiles>
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</configuration>
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</plugin>
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</plugins>
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</build>
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<repositories>
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<repository>
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<id>velocitypowered-repo</id>
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<url>https://nexus.velocitypowered.com/repository/maven-public/</url>
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</repository>
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</repositories>
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<dependencies>
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<dependency>
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<groupId>com.velocitypowered</groupId>
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<artifactId>velocity-api</artifactId>
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<version>3.0.0</version>
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<scope>provided</scope>
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</dependency>
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<dependency>
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<groupId>net.kyori</groupId>
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<artifactId>adventure-text-minimessage</artifactId>
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<version>4.1.0-SNAPSHOT</version>
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</dependency>
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<dependency>
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<groupId>org.bstats</groupId>
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<artifactId>bstats-velocity</artifactId>
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<version>2.2.1</version>
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<scope>compile</scope>
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</dependency>
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</dependencies>
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</project>

‎src/main/java/lol/hyper/velocityblockversion/VelocityBlockVersion.java‎

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package lol.hyper.velocityblockversion;
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import com.google.inject.Inject;
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import com.velocitypowered.api.event.PostOrder;
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import com.velocitypowered.api.event.connection.PreLoginEvent;
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import com.velocitypowered.api.event.proxy.ProxyInitializeEvent;
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import com.velocitypowered.api.event.Subscribe;
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import com.velocitypowered.api.plugin.Plugin;
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import lol.hyper.velocityblockversion.tools.ConfigHandler;
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import lol.hyper.velocityblockversion.tools.VersionToStrings;
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import net.kyori.adventure.text.Component;
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import net.kyori.adventure.text.minimessage.MiniMessage;
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import org.bstats.velocity.Metrics;
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import org.slf4j.Logger;
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@Plugin(
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id = "velocityblockversion",
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name = "VelocityBlockVersion",
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version = "1.0",
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authors = {"hyperdefined"},
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description = "Block certain Minecraft versions from connecting to your network."
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)
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public class VelocityBlockVersion {
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public ConfigHandler configHandler;
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public final Logger logger;
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private final Metrics.Factory metricsFactory;
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@Inject
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public VelocityBlockVersion(Logger logger, Metrics.Factory metricsFactory) {
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this.logger = logger;
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this.metricsFactory = metricsFactory;
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}
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@Subscribe
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public void onProxyInitialization(ProxyInitializeEvent event) {
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VersionToStrings.init();
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configHandler = new ConfigHandler(this);
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configHandler.loadConfig();
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Metrics metrics = metricsFactory.make(this, 13308);
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}
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@Subscribe(order = PostOrder.FIRST)
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public void onPlayerLogin(PreLoginEvent event) {
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int version = event.getConnection().getProtocolVersion().getProtocol();
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if (ConfigHandler.versions.contains(version)) {
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String allowedVersions = VersionToStrings.allowedVersions(ConfigHandler.versions);
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String blockedMessage = configHandler.config.getString("disconnect_message");
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if (allowedVersions == null) {
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blockedMessage = "<red>All versions are currently blocked from playing.</red>";
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}
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if (blockedMessage.contains("{VERSIONS}")) {
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blockedMessage = blockedMessage.replace("{VERSIONS}", allowedVersions);
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}
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Component message = MiniMessage.get().parse(blockedMessage);
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event.setResult(PreLoginEvent.PreLoginComponentResult.denied(message));
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logger.info("Blocking player " + event.getUsername() + " because they are playing on version "
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+ VersionToStrings.versionStrings.get(version) + " which is blocked!");
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}
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}
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}

‎src/main/java/lol/hyper/velocityblockversion/tools/ConfigHandler.java‎

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package lol.hyper.velocityblockversion.tools;
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import com.moandjiezana.toml.Toml;
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import lol.hyper.velocityblockversion.VelocityBlockVersion;
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import java.io.*;
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import java.nio.file.Files;
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import java.util.ArrayList;
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import java.util.Iterator;
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import java.util.List;
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public class ConfigHandler {
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public Toml config;
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private final VelocityBlockVersion velocityBlockVersion;
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public static final List<Integer> versions = new ArrayList<>();
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public static final double CONFIG_VERSION = 2;
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public ConfigHandler(VelocityBlockVersion velocityBlockVersion) {
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this.velocityBlockVersion = velocityBlockVersion;
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}
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public void loadConfig() {
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File configFile = new File("plugins" + File.separator + "VelocityBlockVersion", "config.toml");
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if (!configFile.exists()) {
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InputStream is = velocityBlockVersion.getClass().getResourceAsStream( "/config.toml");
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File path = new File("plugins" + File.separator + "VelocityBlockVersion");
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try {
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if (path.mkdir()) {
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Files.copy(is, configFile.toPath());
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velocityBlockVersion.logger.info("Copying default config...");
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} else {
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velocityBlockVersion.logger.error("Unable to create config folder!");
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}
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} catch (IOException e) {
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velocityBlockVersion.logger.error("Unable to copy default config!", e);
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}
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}
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InputStream inputStream;
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try {
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inputStream = new FileInputStream(configFile);
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} catch (FileNotFoundException e) {
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velocityBlockVersion.logger.error("Unable to find config!", e);
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return;
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}
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config = new Toml().read(inputStream);
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if (config.getLong("config_version") != CONFIG_VERSION) {
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velocityBlockVersion.logger.warn(
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"Your config is outdated. We will attempt to load your current config. However, things might not work!");
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velocityBlockVersion.logger.warn(
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"To fix this, delete your current config and let the server remake it.");
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}
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// for some reason, the config loads the versions as longs
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// we have to convert them this ugly way
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for (Object obj : config.getList("versions")) {
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long t = (long) obj;
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versions.add((int) t);
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}
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if (versions.size() == 0) {
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velocityBlockVersion.logger.warn("There are no versions listed in the config!");
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} else {
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velocityBlockVersion.logger.info("Loaded " + versions.size() + " versions!");
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}
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// use an iterator here so we can remove stuff
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Iterator<Integer> iter = versions.iterator();
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while (iter.hasNext()) {
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int version = iter.next();
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if (!VersionToStrings.versionStrings.containsKey(version)) {
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velocityBlockVersion.logger.warn(
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"Version " + version + " is NOT a valid version number! Ignoring this version.");
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iter.remove();
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}
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}
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}
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}

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