Initial commit

.gitignore

@@ -0,0 +1,4 @@
+/.gradle
+/.idea
+/build
+/run

build.gradle

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+plugins {
+    id 'java'
+    id("xyz.jpenilla.run-paper") version "2.3.1"
+}
+
+group = 'com.kasetoatz'
+version = '1.0'
+
+repositories {
+    mavenCentral()
+    maven {
+        name = "spigotmc-repo"
+        url = "https://hub.spigotmc.org/nexus/content/repositories/snapshots/"
+    }
+}
+
+dependencies {
+    compileOnly("org.spigotmc:spigot-api:1.21.8-R0.1-SNAPSHOT")
+}
+
+tasks {
+    runServer {
+        // Configure the Minecraft version for our task.
+        // This is the only required configuration besides applying the plugin.
+        // Your plugin's jar (or shadowJar if present) will be used automatically.
+        minecraftVersion("1.21")
+    }
+}
+
+def targetJavaVersion = 21
+java {
+    def javaVersion = JavaVersion.toVersion(targetJavaVersion)
+    sourceCompatibility = javaVersion
+    targetCompatibility = javaVersion
+    if (JavaVersion.current() < javaVersion) {
+        toolchain.languageVersion = JavaLanguageVersion.of(targetJavaVersion)
+    }
+}
+
+tasks.withType(JavaCompile).configureEach {
+    options.encoding = 'UTF-8'
+
+    if (targetJavaVersion >= 10 || JavaVersion.current().isJava10Compatible()) {
+        options.release.set(targetJavaVersion)
+    }
+}
+
+processResources {
+    def props = [version: version]
+    inputs.properties props
+    filteringCharset 'UTF-8'
+    filesMatching('plugin.yml') {
+        expand props
+    }
+}

gradle/wrapper/gradle-wrapper.properties

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+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.8-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

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+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original 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 POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | 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: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# 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"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

gradlew.bat

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+@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=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@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% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+: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 %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 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!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle

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+rootProject.name = 'untitled'

src/main/java/com/kasetoatz/superBow/Multiplier.java

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+package com.kasetoatz.superBow;
+
+public class Multiplier {
+    public int item;
+    public int book;
+
+    public Multiplier(int item, int book)
+    {
+        this.item = item;
+        this.book = book;
+    }
+}

src/main/java/com/kasetoatz/superBow/SuperBow.java

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+package com.kasetoatz.superBow;
+
+import org.bukkit.Material;
+import org.bukkit.enchantments.Enchantment;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.inventory.PrepareAnvilEvent;
+import org.bukkit.inventory.AnvilInventory;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.Damageable;
+import org.bukkit.inventory.meta.EnchantmentStorageMeta;
+import org.bukkit.inventory.meta.ItemMeta;
+import org.bukkit.inventory.meta.Repairable;
+import org.bukkit.plugin.java.JavaPlugin;
+
+import java.util.Map;
+import java.util.concurrent.atomic.AtomicInteger;
+
+public final class SuperBow extends JavaPlugin implements Listener
+{
+    @Override
+    public void onEnable()
+    {
+        getServer().getPluginManager().registerEvents(this, this);
+    }
+
+    public Map<Enchantment, Integer> getEnchants(ItemStack item)
+    {
+        Map<Enchantment, Integer> enchants = Map.of();
+        if (item.getType() == Material.ENCHANTED_BOOK)
+        {
+            EnchantmentStorageMeta meta = (EnchantmentStorageMeta) item.getItemMeta();
+            if (meta != null)
+            {
+                enchants = meta.getStoredEnchants();
+            }
+        }
+        else
+        {
+            enchants = item.getEnchantments();
+        }
+        return enchants;
+    }
+
+    public int getPenalty(ItemStack item)
+    {
+        if (item.getType() == Material.BOW)
+        {
+            Repairable meta = (Repairable)item.getItemMeta();
+            if (meta != null)
+            {
+                return (int)Math.pow(2, meta.getRepairCost()) - 1;
+            }
+        }
+        return 0;
+    }
+
+    public int calculateCost(ItemStack target, ItemStack sacrifice, boolean renamed, boolean repair)
+    {
+        Map<Enchantment, Multiplier> multipliers = Map.of(
+                Enchantment.UNBREAKING, new Multiplier(2, 1),
+                Enchantment.POWER, new Multiplier(1, 1),
+                Enchantment.PUNCH, new Multiplier(4, 2),
+                Enchantment.FLAME, new Multiplier(4, 2),
+                Enchantment.INFINITY, new Multiplier(8, 4),
+                Enchantment.MENDING, new Multiplier(4, 2)
+        );
+        AtomicInteger cost = new AtomicInteger();
+        getEnchants(sacrifice).forEach((enchant, level) -> {
+            if (!enchant.canEnchantItem(new ItemStack(Material.BOW)))
+            {
+                return;
+            }
+            boolean conflict = getEnchants(target).keySet().stream().anyMatch(e -> (enchant == Enchantment.MENDING && e == Enchantment.INFINITY) || (enchant == Enchantment.INFINITY && e == Enchantment.MENDING) || enchant.conflictsWith(e));
+            if (conflict)
+            {
+                cost.getAndIncrement();
+            }
+            else
+            {
+                int multiplier = multipliers.get(enchant).item;
+                if (sacrifice.getType() == Material.ENCHANTED_BOOK)
+                {
+                    multiplier = multipliers.get(enchant).book;
+                }
+                int targetLevel = getEnchants(target).getOrDefault(enchant, 0);
+                if (targetLevel == level)
+                {
+                    cost.getAndAdd(multiplier * Math.min(level + 1, enchant.getMaxLevel()));
+                }
+                else
+                {
+                    cost.getAndAdd(multiplier * Math.max(level, targetLevel));
+                }
+            }
+        });
+        cost.getAndAdd(getPenalty(target) + getPenalty(sacrifice));
+        if (repair)
+        {
+            cost.getAndAdd(2);
+        }
+        if (renamed)
+        {
+            cost.getAndIncrement();
+        }
+        return cost.get();
+    }
+
+    @EventHandler
+    public void onAnvilPrepare(PrepareAnvilEvent event)
+    {
+        AnvilInventory inv = event.getInventory();
+        ItemStack left = inv.getItem(0);
+        ItemStack right = inv.getItem(1);
+
+        if (left == null || right == null || left.getType() != Material.BOW)
+        {
+            return;
+        }
+
+        boolean hasMending = left.containsEnchantment(Enchantment.MENDING) || right.containsEnchantment(Enchantment.MENDING);
+        boolean hasInfinity = left.containsEnchantment(Enchantment.INFINITY) || right.containsEnchantment(Enchantment.INFINITY);
+
+        boolean hasBookWithBoth = false;
+        if (right.getType() == Material.ENCHANTED_BOOK)
+        {
+            EnchantmentStorageMeta meta = (EnchantmentStorageMeta)right.getItemMeta();
+            if (meta != null)
+            {
+                if (meta.hasStoredEnchant(Enchantment.MENDING) && meta.hasStoredEnchant(Enchantment.INFINITY))
+                {
+                    hasBookWithBoth = true;
+                }
+            }
+        }
+
+        if ((hasMending && hasInfinity) || hasBookWithBoth)
+        {
+            ItemStack result = left.clone();
+            boolean repair = false;
+            if (right.getType() == Material.BOW)
+            {
+                result.addUnsafeEnchantments(right.getEnchantments());
+                int maxDamage = result.getType().getMaxDurability();
+                Damageable leftMeta = (Damageable)left.getItemMeta();
+                Damageable rightMeta = (Damageable)right.getItemMeta();
+                Damageable resultMeta = (Damageable)result.getItemMeta();
+                if (leftMeta == null || rightMeta == null || resultMeta == null)
+                {
+                    return;
+                }
+                int leftDurability = maxDamage - leftMeta.getDamage();
+                int rightDurability = maxDamage - rightMeta.getDamage();
+
+                int durability = Math.min(leftDurability + rightDurability, maxDamage);
+                int damage = maxDamage - durability;
+                repair = resultMeta.getDamage() != damage;
+                resultMeta.setDamage(damage);
+                result.setItemMeta(resultMeta);
+            }
+            else if (hasBookWithBoth)
+            {
+                EnchantmentStorageMeta book = (EnchantmentStorageMeta)right.getItemMeta();
+                if (book == null)
+                {
+                    return;
+                }
+                result.addUnsafeEnchantments(book.getStoredEnchants());
+            }
+            ItemMeta meta = result.getItemMeta();
+            if (meta == null)
+            {
+                return;
+            }
+            boolean renamed = !meta.getDisplayName().equals(event.getView().getRenameText());
+            meta.setDisplayName(event.getView().getRenameText());
+            result.setItemMeta(meta);
+            event.getView().setRepairCost(calculateCost(left, right, renamed, repair));
+            event.setResult(result);
+        }
+    }
+}

src/main/resources/plugin.yml

@@ -0,0 +1,4 @@
+name: SuperBow
+version: '1.0'
+main: com.kasetoatz.superBow.SuperBow
+api-version: '1.21'