initial commit

.gitattributes

@@ -0,0 +1,5 @@
+# Disable autocrlf on generated files, they always generate with LF
+# Add any extra files or paths here to make git stop saying they
+# are changed when only line endings change.
+src/generated/**/.cache/* text eol=lf
+src/generated/**/*.json text eol=lf

.github/workflows/build.yml

@@ -0,0 +1,30 @@
+name: Build
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          fetch-tags: true
+
+      - name: Setup JDK 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v4
+
+      # This is needed to be able to run ./gradlew below
+      # You can run `git update-index --chmod +x gradlew` then remove this step.
+      - name: Make Gradle wrapper executable
+        run: chmod +x ./gradlew
+
+      - name: Build with Gradle
+        run: ./gradlew build

.gitignore

@@ -0,0 +1,41 @@
+### Gradle ###
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/**/build/
+
+### IntelliJ IDEA ###
+.idea/
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/**/out/
+
+.run/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.eclipse/
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/**/bin/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store
+
+### Minecraft Modding ###
+run/
+!**/src/**/run/
+**/src/generated/**/.cache/
+repo/
+!**/src/**/repo/
+/.gradle-user-home/

README.md

@@ -0,0 +1,25 @@
+
+Installation information
+=======
+
+This template repository can be directly cloned to get you started with a new
+mod. Simply create a new repository cloned from this one, by following the
+instructions provided by [GitHub](https://docs.github.com/en/repositories/creating-and-managing-repositories/creating-a-repository-from-a-template).
+
+Once you have your clone, simply open the repository in the IDE of your choice. The usual recommendation for an IDE is either IntelliJ IDEA or Eclipse.
+
+If at any point you are missing libraries in your IDE, or you've run into problems you can
+run `gradlew --refresh-dependencies` to refresh the local cache. `gradlew clean` to reset everything 
+{this does not affect your code} and then start the process again.
+
+Mapping Names:
+============
+By default, the MDK is configured to use the official mapping names from Mojang for methods and fields 
+in the Minecraft codebase. These names are covered by a specific license. All modders should be aware of this
+license. For the latest license text, refer to the mapping file itself, or the reference copy here:
+https://github.com/NeoForged/NeoForm/blob/main/Mojang.md
+
+Additional Resources: 
+==========
+Community Documentation: https://docs.neoforged.net/  
+NeoForged Discord: https://discord.neoforged.net/

TEMPLATE_LICENSE.txt

@@ -0,0 +1,24 @@
+MIT License
+
+Copyright (c) 2023 NeoForged project
+
+This license applies to the template files as supplied by github.com/NeoForged/MDK
+
+
+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 +1,180 @@
+plugins {
+    id 'java-library'
+    id 'maven-publish'
+    id 'net.neoforged.moddev' version '2.0.140'
+    id 'idea'
+}
+
+tasks.named('wrapper', Wrapper).configure {
+    // Define wrapper values here so as to not have to always do so when updating gradlew.properties.
+    // Switching this to Wrapper.DistributionType.ALL will download the full gradle sources that comes with
+    // documentation attached on cursor hover of gradle classes and methods. However, this comes with increased
+    // file size for Gradle. If you do switch this to ALL, run the Gradle wrapper task twice afterwards.
+    // (Verify by checking gradle/wrapper/gradle-wrapper.properties to see if distributionUrl now points to `-all`)
+    distributionType = Wrapper.DistributionType.BIN
+}
+
+version = mod_version
+group = mod_group_id
+
+sourceSets.main.resources {
+    // Include resources generated by data generators.
+    srcDir('src/generated/resources')
+
+    // Exclude common development only resources from finalized outputs
+    exclude("**/*.bbmodel") // BlockBench project files
+    exclude("src/generated/**/.cache") // datagen cache files
+}
+
+repositories {
+    maven {
+        url = uri("https://cursemaven.com/")
+        content {
+            includeGroup "curse.maven"
+        }
+    }
+}
+
+base {
+    archivesName = mod_id
+}
+
+// Mojang ships Java 21 to end users in 1.21.1, so mods should target Java 21.
+java.toolchain.languageVersion = JavaLanguageVersion.of(21)
+
+neoForge {
+    // Specify the version of NeoForge to use.
+    version = project.neo_version
+
+    parchment {
+        mappingsVersion = project.parchment_mappings_version
+        minecraftVersion = project.parchment_minecraft_version
+    }
+
+    // This line is optional. Access Transformers are automatically detected
+    // accessTransformers = project.files('src/main/resources/META-INF/accesstransformer.cfg')
+
+    // Default run configurations.
+    // These can be tweaked, removed, or duplicated as needed.
+    runs {
+        client {
+            client()
+
+            // Comma-separated list of namespaces to load gametests from. Empty = all namespaces.
+            systemProperty 'neoforge.enabledGameTestNamespaces', project.mod_id
+        }
+
+        server {
+            server()
+            programArgument '--nogui'
+            systemProperty 'neoforge.enabledGameTestNamespaces', project.mod_id
+        }
+
+        // This run config launches GameTestServer and runs all registered gametests, then exits.
+        // By default, the server will crash when no gametests are provided.
+        // The gametest system is also enabled by default for other run configs under the /test command.
+        gameTestServer {
+            type = "gameTestServer"
+            systemProperty 'neoforge.enabledGameTestNamespaces', project.mod_id
+        }
+
+        data {
+            data()
+
+            // example of overriding the workingDirectory set in configureEach above, uncomment if you want to use it
+            // gameDirectory = project.file('run-data')
+
+            // Specify the modid for data generation, where to output the resulting resource, and where to look for existing resources.
+            programArguments.addAll '--mod', project.mod_id, '--all', '--output', file('src/generated/resources/').getAbsolutePath(), '--existing', file('src/main/resources/').getAbsolutePath()
+        }
+
+        // applies to all the run configs above
+        configureEach {
+            // Recommended logging data for a userdev environment
+            // The markers can be added/remove as needed separated by commas.
+            // "SCAN": For mods scan.
+            // "REGISTRIES": For firing of registry events.
+            // "REGISTRYDUMP": For getting the contents of all registries.
+            systemProperty 'forge.logging.markers', 'REGISTRIES'
+
+            // Recommended logging level for the console
+            // You can set various levels here.
+            // Please read: https://stackoverflow.com/questions/2031163/when-to-use-the-different-log-levels
+            logLevel = org.slf4j.event.Level.DEBUG
+        }
+    }
+
+    mods {
+        // define mod <-> source bindings
+        // these are used to tell the game which sources are for which mod
+        // multi mod projects should define one per mod
+        "${mod_id}" {
+            sourceSet(sourceSets.main)
+        }
+    }
+}
+
+// Sets up a dependency configuration called 'localRuntime'.
+// This configuration should be used instead of 'runtimeOnly' to declare
+// a dependency that will be present for runtime testing but that is
+// "optional", meaning it will not be pulled by dependents of this mod.
+configurations {
+    runtimeClasspath.extendsFrom localRuntime
+}
+
+dependencies {
+    // Dev-runtime helpers for the client.
+    compileOnly "curse.maven:jei-238222:7391682"
+    localRuntime "curse.maven:jade-324717:6155158"
+    localRuntime "curse.maven:jei-238222:7391682"
+}
+
+// This block of code expands all declared replace properties in the specified resource targets.
+// A missing property will result in an error. Properties are expanded using ${} Groovy notation.
+var generateModMetadata = tasks.register("generateModMetadata", ProcessResources) {
+    var replaceProperties = [
+            minecraft_version      : minecraft_version,
+            minecraft_version_range: minecraft_version_range,
+            neo_version            : neo_version,
+            loader_version_range   : loader_version_range,
+            mod_id                 : mod_id,
+            mod_name               : mod_name,
+            mod_license            : mod_license,
+            mod_version            : mod_version,
+    ]
+    inputs.properties replaceProperties
+    expand replaceProperties
+    from "src/main/templates"
+    into "build/generated/sources/modMetadata"
+}
+// Include the output of "generateModMetadata" as an input directory for the build
+// this works with both building through Gradle and the IDE.
+sourceSets.main.resources.srcDir generateModMetadata
+// To avoid having to run "generateModMetadata" manually, make it run on every project reload
+neoForge.ideSyncTask generateModMetadata
+
+// Example configuration to allow publishing using the maven-publish plugin
+publishing {
+    publications {
+        register('mavenJava', MavenPublication) {
+            from components.java
+        }
+    }
+    repositories {
+        maven {
+            url "file://${project.projectDir}/repo"
+        }
+    }
+}
+
+tasks.withType(JavaCompile).configureEach {
+    options.encoding = 'UTF-8' // Use the UTF-8 charset for Java compilation
+}
+
+// IDEA no longer automatically downloads sources/javadoc jars for dependencies, so we need to explicitly enable the behavior.
+idea {
+    module {
+        downloadSources = true
+        downloadJavadoc = true
+    }
+}

gradle.properties

@@ -0,0 +1,39 @@
+# Sets default memory used for gradle commands. Can be overridden by user or command line properties.
+org.gradle.jvmargs=-Xmx1G
+org.gradle.daemon=true
+org.gradle.parallel=true
+org.gradle.caching=true
+org.gradle.configuration-cache=true
+
+#read more on this at https://github.com/neoforged/ModDevGradle?tab=readme-ov-file#better-minecraft-parameter-names--javadoc-parchment
+# you can also find the latest versions at: https://parchmentmc.org/docs/getting-started
+parchment_minecraft_version=1.21.1
+parchment_mappings_version=2024.11.17
+# Environment Properties
+# You can find the latest versions here: https://projects.neoforged.net/neoforged/neoforge
+# The Minecraft version must agree with the Neo version to get a valid artifact
+minecraft_version=1.21.1
+# The Minecraft version range can use any release version of Minecraft as bounds.
+# Snapshots, pre-releases, and release candidates are not guaranteed to sort properly
+# as they do not follow standard versioning conventions.
+minecraft_version_range=[1.21.1]
+# The Neo version must agree with the Minecraft version to get a valid artifact
+neo_version=21.1.220
+# The loader version range can only use the major version of FML as bounds
+loader_version_range=[1,)
+
+## Mod Properties
+
+# The unique mod identifier for the mod. Must be lowercase in English locale. Must fit the regex [a-z][a-z0-9_]{1,63}
+# Must match the String constant located in the main mod class annotated with @Mod.
+mod_id=bagtabs
+# The human-readable display name for the mod.
+mod_name=Bag Tabs
+# The license of the mod. Review your options at https://choosealicense.com/. All Rights Reserved is the default.
+mod_license=All Rights Reserved
+# The mod version. See https://semver.org/
+mod_version=1.0.0
+# The group ID for the mod. It is only important when publishing as an artifact to a Maven repository.
+# This should match the base package used for the mod sources.
+# See https://maven.apache.org/guides/mini/guide-naming-conventions.html
+mod_group_id=com.trunksbomb.bagtabs

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.2.1-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,251 @@
+#!/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.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   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 -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || 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 "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH="\\\"\\\""
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$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, 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" \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
+        "$@"
+
+# 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

@@ -0,0 +1,94 @@
+@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
+@rem SPDX-License-Identifier: Apache-2.0
+@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=
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
+
+: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

@@ -0,0 +1,9 @@
+pluginManagement {
+    repositories {
+        gradlePluginPortal()
+    }
+}
+
+plugins {
+    id 'org.gradle.toolchains.foojay-resolver-convention' version '1.0.0'
+}

src/main/java/com/trunksbomb/bagtabs/BagTabs.java

@@ -0,0 +1,75 @@
+package com.trunksbomb.bagtabs;
+
+import com.mojang.logging.LogUtils;
+import com.trunksbomb.bagtabs.item.BagItem;
+import com.trunksbomb.bagtabs.menu.BagMenu;
+import com.trunksbomb.bagtabs.network.BagTabsNetwork;
+import net.minecraft.core.registries.Registries;
+import net.minecraft.network.chat.Component;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.world.item.CreativeModeTab;
+import net.minecraft.world.item.CreativeModeTabs;
+import net.minecraft.world.item.Item;
+import net.minecraft.world.item.component.DyedItemColor;
+import net.minecraft.world.item.component.ItemContainerContents;
+import net.neoforged.bus.api.IEventBus;
+import net.neoforged.fml.common.Mod;
+import net.neoforged.neoforge.network.event.RegisterPayloadHandlersEvent;
+import net.neoforged.neoforge.registries.DeferredHolder;
+import net.neoforged.neoforge.registries.DeferredItem;
+import net.neoforged.neoforge.registries.DeferredRegister;
+import org.slf4j.Logger;
+import net.minecraft.core.component.DataComponents;
+import net.minecraft.world.inventory.MenuType;
+import net.neoforged.neoforge.common.extensions.IMenuTypeExtension;
+
+@Mod(BagTabs.MODID)
+public class BagTabs {
+    public static final String MODID = "bagtabs";
+    public static final Logger LOGGER = LogUtils.getLogger();
+
+    public static final DeferredRegister.Items ITEMS = DeferredRegister.createItems(MODID);
+    public static final DeferredRegister<MenuType<?>> MENUS = DeferredRegister.create(Registries.MENU, MODID);
+    public static final DeferredRegister<CreativeModeTab> CREATIVE_MODE_TABS = DeferredRegister.create(Registries.CREATIVE_MODE_TAB, MODID);
+
+    public static final DeferredItem<Item> BAG = ITEMS.register("bag", () -> new BagItem(
+            new Item.Properties()
+                    .stacksTo(1)
+                    .component(DataComponents.CONTAINER, ItemContainerContents.EMPTY)
+                    .component(DataComponents.DYED_COLOR, new DyedItemColor(BagItem.DEFAULT_COLOR, true))
+    ));
+    public static final DeferredHolder<CreativeModeTab, CreativeModeTab> BAG_TAB = CREATIVE_MODE_TABS.register(
+            "main",
+            () -> CreativeModeTab.builder()
+                    .title(Component.translatable("itemGroup." + MODID))
+                    .withTabsBefore(CreativeModeTabs.TOOLS_AND_UTILITIES)
+                    .icon(() -> BAG.get().getDefaultInstance())
+                    .displayItems((parameters, output) -> BagItem.createCreativeStacks().forEach(output::accept))
+                    .build()
+    );
+
+    public static final DeferredHolder<MenuType<?>, MenuType<BagMenu>> BAG_MENU = MENUS.register(
+            "bag",
+            () -> IMenuTypeExtension.create(BagMenu::fromNetwork)
+    );
+
+    public BagTabs(IEventBus modEventBus) {
+        ITEMS.register(modEventBus);
+        MENUS.register(modEventBus);
+        CREATIVE_MODE_TABS.register(modEventBus);
+
+        modEventBus.addListener(this::registerPayloadHandlers);
+    }
+
+    private void registerPayloadHandlers(RegisterPayloadHandlersEvent event) {
+        BagTabsNetwork.register(event.registrar("1"));
+    }
+
+    public static Component translation(String path) {
+        return Component.translatable("bagtabs." + path);
+    }
+
+    public static ResourceLocation id(String path) {
+        return ResourceLocation.fromNamespaceAndPath(MODID, path);
+    }
+}

src/main/java/com/trunksbomb/bagtabs/BagTabsClient.java

@@ -0,0 +1,48 @@
+package com.trunksbomb.bagtabs;
+
+import com.trunksbomb.bagtabs.client.BagScreen;
+import com.trunksbomb.bagtabs.client.BagTabOverlay;
+import net.neoforged.bus.api.IEventBus;
+import net.minecraft.client.color.item.ItemColor;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.component.DyedItemColor;
+import net.neoforged.api.distmarker.Dist;
+import net.neoforged.fml.common.Mod;
+import net.neoforged.neoforge.client.event.RegisterColorHandlersEvent;
+import net.neoforged.neoforge.client.event.RegisterMenuScreensEvent;
+import net.neoforged.neoforge.client.event.ScreenEvent;
+import net.neoforged.neoforge.common.NeoForge;
+
+@Mod(value = BagTabs.MODID, dist = Dist.CLIENT)
+public class BagTabsClient {
+    public BagTabsClient(IEventBus modEventBus) {
+        modEventBus.addListener(BagTabsClient::registerScreens);
+        modEventBus.addListener(BagTabsClient::registerItemColors);
+        NeoForge.EVENT_BUS.addListener(BagTabsClient::renderTabs);
+        NeoForge.EVENT_BUS.addListener(BagTabsClient::clickTabs);
+    }
+
+    private static void registerScreens(RegisterMenuScreensEvent event) {
+        event.register(BagTabs.BAG_MENU.get(), BagScreen::new);
+    }
+
+    private static void registerItemColors(RegisterColorHandlersEvent.Item event) {
+        ItemColor bagColor = (stack, tintIndex) -> tintIndex == 0 ? DyedItemColor.getOrDefault(stack, BagItemColor.DEFAULT_TINT) : -1;
+        event.register(bagColor, BagTabs.BAG.get());
+    }
+
+    private static void renderTabs(ScreenEvent.Render.Post event) {
+        BagTabOverlay.render(event);
+    }
+
+    private static void clickTabs(ScreenEvent.MouseButtonPressed.Pre event) {
+        BagTabOverlay.mouseClicked(event);
+    }
+
+    private static final class BagItemColor {
+        private static final int DEFAULT_TINT = 0x9E7B4F;
+
+        private BagItemColor() {
+        }
+    }
+}

src/main/java/com/trunksbomb/bagtabs/bag/BagAccess.java

@@ -0,0 +1,26 @@
+package com.trunksbomb.bagtabs.bag;
+
+import java.util.ArrayList;
+import java.util.List;
+import net.minecraft.world.entity.player.Inventory;
+import net.minecraft.world.entity.player.Player;
+import net.minecraft.world.item.ItemStack;
+
+public final class BagAccess {
+    private BagAccess() {
+    }
+
+    public static List<BagEntry> findBags(Player player) {
+        List<BagEntry> bags = new ArrayList<>();
+        Inventory inventory = player.getInventory();
+
+        for (int slot = 0; slot < inventory.getContainerSize(); slot++) {
+            ItemStack stack = inventory.getItem(slot);
+            if (stack.getItem() instanceof InventoryBag inventoryBag) {
+                bags.add(new BagEntry(slot, stack.copy(), inventoryBag));
+            }
+        }
+
+        return bags;
+    }
+}

src/main/java/com/trunksbomb/bagtabs/bag/BagContainer.java

@@ -0,0 +1,58 @@
+package com.trunksbomb.bagtabs.bag;
+
+import com.trunksbomb.bagtabs.item.BagItem;
+import net.minecraft.core.NonNullList;
+import net.minecraft.core.component.DataComponents;
+import net.minecraft.world.SimpleContainer;
+import net.minecraft.world.entity.player.Player;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.component.ItemContainerContents;
+
+public class BagContainer extends SimpleContainer {
+    private final Player player;
+    private final int slot;
+
+    public BagContainer(Player player, int slot) {
+        super(BagItem.SLOT_COUNT);
+        this.player = player;
+        this.slot = slot;
+
+        ItemContainerContents contents = player.getInventory().getItem(slot).getOrDefault(DataComponents.CONTAINER, ItemContainerContents.EMPTY);
+        contents.copyInto(this.getItems());
+    }
+
+    @Override
+    public boolean canPlaceItem(int index, ItemStack stack) {
+        return !(stack.getItem() instanceof InventoryBag);
+    }
+
+    @Override
+    public void setChanged() {
+        super.setChanged();
+        ItemStack bagStack = this.player.getInventory().getItem(this.slot);
+        if (!bagStack.isEmpty() && bagStack.getItem() instanceof BagItem) {
+            bagStack.set(DataComponents.CONTAINER, ItemContainerContents.fromItems(this.copyItems()));
+            this.player.getInventory().setChanged();
+        }
+    }
+
+    @Override
+    public boolean stillValid(Player player) {
+        if (player != this.player) {
+            return false;
+        }
+
+        ItemStack current = player.getInventory().getItem(this.slot);
+        return current.getItem() instanceof BagItem;
+    }
+
+    private NonNullList<ItemStack> copyItems() {
+        NonNullList<ItemStack> items = NonNullList.withSize(this.getContainerSize(), ItemStack.EMPTY);
+
+        for (int i = 0; i < this.getContainerSize(); i++) {
+            items.set(i, this.getItem(i).copy());
+        }
+
+        return items;
+    }
+}

src/main/java/com/trunksbomb/bagtabs/bag/BagEntry.java

@@ -0,0 +1,6 @@
+package com.trunksbomb.bagtabs.bag;
+
+import net.minecraft.world.item.ItemStack;
+
+public record BagEntry(int slot, ItemStack stack, InventoryBag bag) {
+}

src/main/java/com/trunksbomb/bagtabs/bag/InventoryBag.java

@@ -0,0 +1,7 @@
+package com.trunksbomb.bagtabs.bag;
+
+import net.minecraft.server.level.ServerPlayer;
+
+public interface InventoryBag {
+    void openFromInventory(ServerPlayer player, int slot);
+}

src/main/java/com/trunksbomb/bagtabs/client/BagScreen.java

@@ -0,0 +1,32 @@
+package com.trunksbomb.bagtabs.client;
+
+import com.trunksbomb.bagtabs.menu.BagMenu;
+import net.minecraft.client.gui.GuiGraphics;
+import net.minecraft.client.gui.screens.inventory.AbstractContainerScreen;
+import net.minecraft.network.chat.Component;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.world.entity.player.Inventory;
+
+public class BagScreen extends AbstractContainerScreen<BagMenu> {
+    private static final ResourceLocation CONTAINER_BACKGROUND = ResourceLocation.withDefaultNamespace("textures/gui/container/generic_54.png");
+
+    public BagScreen(BagMenu menu, Inventory playerInventory, Component title) {
+        super(menu, playerInventory, title);
+        this.imageHeight = 168;
+        this.inventoryLabelY = this.imageHeight - 94;
+    }
+
+    @Override
+    public void render(GuiGraphics guiGraphics, int mouseX, int mouseY, float partialTick) {
+        super.render(guiGraphics, mouseX, mouseY, partialTick);
+        this.renderTooltip(guiGraphics, mouseX, mouseY);
+    }
+
+    @Override
+    protected void renderBg(GuiGraphics guiGraphics, float partialTick, int mouseX, int mouseY) {
+        int left = this.leftPos;
+        int top = this.topPos;
+        guiGraphics.blit(CONTAINER_BACKGROUND, left, top, 0, 0, this.imageWidth, 71);
+        guiGraphics.blit(CONTAINER_BACKGROUND, left, top + 71, 0, 126, this.imageWidth, 96);
+    }
+}

src/main/java/com/trunksbomb/bagtabs/client/BagTabOverlay.java

@@ -0,0 +1,125 @@
+package com.trunksbomb.bagtabs.client;
+
+import com.trunksbomb.bagtabs.BagTabs;
+import com.trunksbomb.bagtabs.bag.BagAccess;
+import com.trunksbomb.bagtabs.bag.BagEntry;
+import com.trunksbomb.bagtabs.item.BagItem;
+import com.trunksbomb.bagtabs.network.OpenBagPayload;
+import com.mojang.blaze3d.systems.RenderSystem;
+import java.util.ArrayList;
+import java.util.List;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.GuiGraphics;
+import net.minecraft.client.gui.screens.inventory.AbstractContainerScreen;
+import net.minecraft.client.gui.screens.inventory.InventoryScreen;
+import net.minecraft.client.resources.sounds.SimpleSoundInstance;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.sounds.SoundEvents;
+import net.minecraft.world.entity.player.Player;
+import net.minecraft.world.item.component.DyedItemColor;
+import net.neoforged.neoforge.client.event.ScreenEvent;
+import net.neoforged.neoforge.network.PacketDistributor;
+
+public final class BagTabOverlay {
+    private static final ResourceLocation TAB_BASE_TEXTURE = BagTabs.id("textures/gui/bag_tabs_base.png");
+    private static final ResourceLocation TAB_OVERLAY_TEXTURE = BagTabs.id("textures/gui/bag_tabs_overlay.png");
+    private static final int TAB_WIDTH = 22;
+    private static final int TAB_HEIGHT = 22;
+    private static final int TAB_GAP = 0;
+    private static final int TAB_Y_OFFSET = -3;
+    private static final int TAB_X_OFFSET = 7;
+
+    private BagTabOverlay() {
+    }
+
+    public static void render(ScreenEvent.Render.Post event) {
+        if (!(event.getScreen() instanceof InventoryScreen inventoryScreen)) {
+            return;
+        }
+
+        Player player = Minecraft.getInstance().player;
+        if (player == null) {
+            return;
+        }
+
+        List<RenderedTab> tabs = getRenderedTabs(inventoryScreen, player);
+        if (tabs.isEmpty()) {
+            return;
+        }
+
+        GuiGraphics guiGraphics = event.getGuiGraphics();
+        int mouseX = event.getMouseX();
+        int mouseY = event.getMouseY();
+
+        for (RenderedTab tab : tabs) {
+            renderTab(guiGraphics, tab, mouseX, mouseY);
+            guiGraphics.renderItem(tab.entry().stack(), tab.x() + 3, tab.y() + 3);
+        }
+
+        for (RenderedTab tab : tabs) {
+            if (tab.isHovered(mouseX, mouseY)) {
+                guiGraphics.renderTooltip(Minecraft.getInstance().font, tab.entry().stack().getHoverName(), mouseX, mouseY);
+                break;
+            }
+        }
+    }
+
+    public static void mouseClicked(ScreenEvent.MouseButtonPressed.Pre event) {
+        if (!(event.getScreen() instanceof InventoryScreen inventoryScreen) || event.getButton() != 0) {
+            return;
+        }
+
+        Player player = Minecraft.getInstance().player;
+        if (player == null) {
+            return;
+        }
+
+        for (RenderedTab tab : getRenderedTabs(inventoryScreen, player)) {
+            if (tab.isHovered(event.getMouseX(), event.getMouseY())) {
+                PacketDistributor.sendToServer(new OpenBagPayload(tab.entry().slot()));
+                Minecraft.getInstance().getSoundManager().play(SimpleSoundInstance.forUI(SoundEvents.UI_BUTTON_CLICK, 1.0F));
+                event.setCanceled(true);
+                return;
+            }
+        }
+    }
+
+    private static List<RenderedTab> getRenderedTabs(AbstractContainerScreen<?> screen, Player player) {
+        List<BagEntry> bags = BagAccess.findBags(player);
+        List<RenderedTab> renderedTabs = new ArrayList<>();
+        int x = screen.getGuiLeft() + TAB_X_OFFSET;
+        int y = screen.getGuiTop() + screen.getYSize() + TAB_Y_OFFSET;
+        int maxX = screen.getGuiLeft() + screen.getXSize() - TAB_WIDTH;
+
+        for (BagEntry bag : bags) {
+            if (x > maxX) {
+                break;
+            }
+
+            renderedTabs.add(new RenderedTab(bag, x, y));
+            x += TAB_WIDTH + TAB_GAP;
+        }
+
+        return renderedTabs;
+    }
+
+    private static void renderTab(GuiGraphics guiGraphics, RenderedTab tab, int mouseX, int mouseY) {
+        boolean hovered = tab.isHovered(mouseX, mouseY);
+        int color = DyedItemColor.getOrDefault(tab.entry().stack(), BagItem.DEFAULT_COLOR);
+        float red = ((color >> 16) & 0xFF) / 255.0F;
+        float green = ((color >> 8) & 0xFF) / 255.0F;
+        float blue = (color & 0xFF) / 255.0F;
+        int uOffset = hovered ? TAB_WIDTH : 0;
+
+        RenderSystem.setShaderColor(red, green, blue, 1.0F);
+        guiGraphics.blit(TAB_BASE_TEXTURE, tab.x(), tab.y(), uOffset, 0, TAB_WIDTH, TAB_HEIGHT, TAB_WIDTH * 2, TAB_HEIGHT);
+        RenderSystem.setShaderColor(1.0F, 1.0F, 1.0F, 1.0F);
+        guiGraphics.blit(TAB_OVERLAY_TEXTURE, tab.x(), tab.y(), uOffset, 0, TAB_WIDTH, TAB_HEIGHT, TAB_WIDTH * 2, TAB_HEIGHT);
+    }
+
+    private record RenderedTab(BagEntry entry, int x, int y) {
+        private boolean isHovered(double mouseX, double mouseY) {
+            return mouseX >= this.x && mouseX < this.x + TAB_WIDTH && mouseY >= this.y && mouseY < this.y + TAB_HEIGHT;
+        }
+    }
+}

src/main/java/com/trunksbomb/bagtabs/compat/jei/BagTabsJeiPlugin.java

@@ -0,0 +1,42 @@
+package com.trunksbomb.bagtabs.compat.jei;
+
+import com.trunksbomb.bagtabs.BagTabs;
+import com.trunksbomb.bagtabs.item.BagItem;
+import mezz.jei.api.IModPlugin;
+import mezz.jei.api.JeiPlugin;
+import mezz.jei.api.constants.VanillaTypes;
+import mezz.jei.api.ingredients.subtypes.IIngredientSubtypeInterpreter;
+import mezz.jei.api.ingredients.subtypes.UidContext;
+import mezz.jei.api.registration.IExtraIngredientRegistration;
+import mezz.jei.api.registration.ISubtypeRegistration;
+import net.minecraft.core.component.DataComponents;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.world.item.component.DyedItemColor;
+
+@JeiPlugin
+public class BagTabsJeiPlugin implements IModPlugin {
+    private static final ResourceLocation PLUGIN_UID = BagTabs.id("jei_plugin");
+
+    @Override
+    public ResourceLocation getPluginUid() {
+        return PLUGIN_UID;
+    }
+
+    @Override
+    public void registerItemSubtypes(ISubtypeRegistration registration) {
+        registration.registerSubtypeInterpreter(BagTabs.BAG.get(), (stack, context) -> {
+            if (context == UidContext.Ingredient) {
+                DyedItemColor color = stack.get(DataComponents.DYED_COLOR);
+                if (color != null) {
+                    return Integer.toHexString(color.rgb());
+                }
+            }
+            return IIngredientSubtypeInterpreter.NONE;
+        });
+    }
+
+    @Override
+    public void registerExtraIngredients(IExtraIngredientRegistration registration) {
+        registration.addExtraIngredients(VanillaTypes.ITEM_STACK, BagItem.createCreativeStacks());
+    }
+}

src/main/java/com/trunksbomb/bagtabs/item/BagItem.java

@@ -0,0 +1,86 @@
+package com.trunksbomb.bagtabs.item;
+
+import com.trunksbomb.bagtabs.BagTabs;
+import com.trunksbomb.bagtabs.bag.BagContainer;
+import com.trunksbomb.bagtabs.bag.InventoryBag;
+import com.trunksbomb.bagtabs.menu.BagMenu;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.OptionalInt;
+import net.minecraft.core.component.DataComponents;
+import net.minecraft.network.chat.Component;
+import net.minecraft.server.level.ServerPlayer;
+import net.minecraft.world.InteractionHand;
+import net.minecraft.world.InteractionResultHolder;
+import net.minecraft.world.SimpleMenuProvider;
+import net.minecraft.world.entity.player.Inventory;
+import net.minecraft.world.entity.player.Player;
+import net.minecraft.world.item.DyeColor;
+import net.minecraft.world.item.Item;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.component.DyedItemColor;
+import net.minecraft.world.level.Level;
+
+public class BagItem extends Item implements InventoryBag {
+    public static final int SLOT_COUNT = 27;
+    public static final int DEFAULT_COLOR = 0x9E7B4F;
+
+    public BagItem(Properties properties) {
+        super(properties);
+    }
+
+    public static List<ItemStack> createCreativeStacks() {
+        List<ItemStack> stacks = new ArrayList<>();
+        stacks.add(createColoredStack(DEFAULT_COLOR));
+
+        for (DyeColor dyeColor : DyeColor.values()) {
+            stacks.add(createColoredStack(dyeColor.getTextureDiffuseColor() & 0xFFFFFF));
+        }
+
+        return stacks;
+    }
+
+    public static ItemStack createColoredStack(int color) {
+        ItemStack stack = BagTabs.BAG.get().getDefaultInstance();
+        stack.set(DataComponents.DYED_COLOR, new DyedItemColor(color, true));
+        return stack;
+    }
+
+    @Override
+    public InteractionResultHolder<ItemStack> use(Level level, Player player, InteractionHand usedHand) {
+        ItemStack stack = player.getItemInHand(usedHand);
+        if (!level.isClientSide && player instanceof ServerPlayer serverPlayer) {
+            this.openFromInventory(serverPlayer, usedHand == InteractionHand.MAIN_HAND ? serverPlayer.getInventory().selected : Inventory.SLOT_OFFHAND);
+        }
+
+        return InteractionResultHolder.sidedSuccess(stack, level.isClientSide);
+    }
+
+    @Override
+    public void openFromInventory(ServerPlayer player, int slot) {
+        ItemStack stack = player.getInventory().getItem(slot);
+        if (!(stack.getItem() instanceof BagItem)) {
+            return;
+        }
+
+        Component title = stack.getHoverName();
+        OptionalInt windowId = player.openMenu(
+                new SimpleMenuProvider((containerId, playerInventory, ignoredPlayer) -> new BagMenu(
+                        containerId,
+                        playerInventory,
+                        new BagContainer(player, slot),
+                        slot
+                ), title),
+                buf -> buf.writeVarInt(slot)
+        );
+
+        if (windowId.isEmpty()) {
+            return;
+        }
+    }
+
+    @Override
+    public boolean canFitInsideContainerItems() {
+        return false;
+    }
+}

src/main/java/com/trunksbomb/bagtabs/menu/BagMenu.java

@@ -0,0 +1,102 @@
+package com.trunksbomb.bagtabs.menu;
+
+import com.trunksbomb.bagtabs.BagTabs;
+import com.trunksbomb.bagtabs.bag.BagContainer;
+import com.trunksbomb.bagtabs.bag.InventoryBag;
+import net.minecraft.network.RegistryFriendlyByteBuf;
+import net.minecraft.world.Container;
+import net.minecraft.world.entity.player.Inventory;
+import net.minecraft.world.entity.player.Player;
+import net.minecraft.world.inventory.AbstractContainerMenu;
+import net.minecraft.world.inventory.Slot;
+import net.minecraft.world.item.ItemStack;
+
+public class BagMenu extends AbstractContainerMenu {
+    private static final int BAG_ROWS = 3;
+    private static final int BAG_COLUMNS = 9;
+    private static final int BAG_SLOT_COUNT = BAG_ROWS * BAG_COLUMNS;
+    private static final int BAG_SLOT_START_Y = 18;
+    private static final int PLAYER_INV_START_Y = 85;
+    private static final int HOTBAR_Y = 143;
+    private final Container container;
+    private final int bagSlot;
+
+    public static BagMenu fromNetwork(int containerId, Inventory playerInventory, RegistryFriendlyByteBuf extraData) {
+        int slot = extraData.readVarInt();
+        return new BagMenu(containerId, playerInventory, new BagContainer(playerInventory.player, slot), slot);
+    }
+
+    public BagMenu(int containerId, Inventory playerInventory, Container container, int bagSlot) {
+        super(BagTabs.BAG_MENU.get(), containerId);
+        checkContainerSize(container, BAG_SLOT_COUNT);
+        this.container = container;
+        this.bagSlot = bagSlot;
+        container.startOpen(playerInventory.player);
+
+        for (int row = 0; row < BAG_ROWS; row++) {
+            for (int column = 0; column < BAG_COLUMNS; column++) {
+                int slotIndex = column + row * BAG_COLUMNS;
+                this.addSlot(new Slot(container, slotIndex, 8 + column * 18, BAG_SLOT_START_Y + row * 18) {
+                    @Override
+                    public boolean mayPlace(ItemStack stack) {
+                        return container.canPlaceItem(this.getSlotIndex(), stack) && !(stack.getItem() instanceof InventoryBag);
+                    }
+                });
+            }
+        }
+
+        for (int row = 0; row < 3; row++) {
+            for (int column = 0; column < 9; column++) {
+                int slotIndex = column + row * 9 + 9;
+                this.addSlot(new Slot(playerInventory, slotIndex, 8 + column * 18, PLAYER_INV_START_Y + row * 18));
+            }
+        }
+
+        for (int column = 0; column < 9; column++) {
+            this.addSlot(new Slot(playerInventory, column, 8 + column * 18, HOTBAR_Y));
+        }
+    }
+
+    public int getBagSlot() {
+        return this.bagSlot;
+    }
+
+    @Override
+    public boolean stillValid(Player player) {
+        return this.container.stillValid(player);
+    }
+
+    @Override
+    public ItemStack quickMoveStack(Player player, int index) {
+        ItemStack copied = ItemStack.EMPTY;
+        Slot slot = this.slots.get(index);
+        if (slot == null || !slot.hasItem()) {
+            return ItemStack.EMPTY;
+        }
+
+        ItemStack stack = slot.getItem();
+        copied = stack.copy();
+
+        if (index < BAG_SLOT_COUNT) {
+            if (!this.moveItemStackTo(stack, BAG_SLOT_COUNT, this.slots.size(), true)) {
+                return ItemStack.EMPTY;
+            }
+        } else if (!this.moveItemStackTo(stack, 0, BAG_SLOT_COUNT, false)) {
+            return ItemStack.EMPTY;
+        }
+
+        if (stack.isEmpty()) {
+            slot.setByPlayer(ItemStack.EMPTY);
+        } else {
+            slot.setChanged();
+        }
+
+        return copied;
+    }
+
+    @Override
+    public void removed(Player player) {
+        super.removed(player);
+        this.container.stopOpen(player);
+    }
+}

src/main/java/com/trunksbomb/bagtabs/network/BagTabsNetwork.java

@@ -0,0 +1,12 @@
+package com.trunksbomb.bagtabs.network;
+
+import net.neoforged.neoforge.network.registration.PayloadRegistrar;
+
+public final class BagTabsNetwork {
+    private BagTabsNetwork() {
+    }
+
+    public static void register(PayloadRegistrar registrar) {
+        registrar.playToServer(OpenBagPayload.TYPE, OpenBagPayload.STREAM_CODEC, OpenBagPayload::handle);
+    }
+}

src/main/java/com/trunksbomb/bagtabs/network/OpenBagPayload.java

@@ -0,0 +1,40 @@
+package com.trunksbomb.bagtabs.network;
+
+import com.trunksbomb.bagtabs.BagTabs;
+import com.trunksbomb.bagtabs.bag.InventoryBag;
+import net.minecraft.network.RegistryFriendlyByteBuf;
+import net.minecraft.network.codec.ByteBufCodecs;
+import net.minecraft.network.codec.StreamCodec;
+import net.minecraft.network.protocol.common.custom.CustomPacketPayload;
+import net.minecraft.server.level.ServerPlayer;
+import net.minecraft.world.item.ItemStack;
+import net.neoforged.neoforge.network.handling.IPayloadContext;
+
+public record OpenBagPayload(int slot) implements CustomPacketPayload {
+    public static final Type<OpenBagPayload> TYPE = new Type<>(BagTabs.id("open_bag"));
+    public static final StreamCodec<RegistryFriendlyByteBuf, OpenBagPayload> STREAM_CODEC = StreamCodec.composite(
+            ByteBufCodecs.VAR_INT,
+            OpenBagPayload::slot,
+            OpenBagPayload::new
+    );
+
+    @Override
+    public Type<OpenBagPayload> type() {
+        return TYPE;
+    }
+
+    public static void handle(OpenBagPayload payload, IPayloadContext context) {
+        if (!(context.player() instanceof ServerPlayer serverPlayer)) {
+            return;
+        }
+
+        if (payload.slot() < 0 || payload.slot() >= serverPlayer.getInventory().getContainerSize()) {
+            return;
+        }
+
+        ItemStack stack = serverPlayer.getInventory().getItem(payload.slot());
+        if (stack.getItem() instanceof InventoryBag inventoryBag) {
+            inventoryBag.openFromInventory(serverPlayer, payload.slot());
+        }
+    }
+}

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

@@ -0,0 +1,6 @@
+{
+  "item.bagtabs.bag": "Traveler's Bag",
+  "itemGroup.bagtabs": "Bag Tabs",
+  "container.bagtabs.bag": "Bag",
+  "bagtabs.tooltip.click_to_open": "Open from your inventory tabs"
+}

src/main/resources/assets/bagtabs/models/item/bag.json

@@ -0,0 +1,7 @@
+{
+  "parent": "minecraft:item/generated",
+  "textures": {
+    "layer0": "bagtabs:item/bag",
+    "layer1": "bagtabs:item/bag_overlay"
+  }
+}

src/main/resources/data/bagtabs/recipes/bag.json

@@ -0,0 +1,20 @@
+{
+  "type": "minecraft:crafting_shaped",
+  "category": "equipment",
+  "pattern": [
+    "LLL",
+    "LCL",
+    "LLL"
+  ],
+  "key": {
+    "L": {
+      "item": "minecraft:leather"
+    },
+    "C": {
+      "item": "minecraft:chest"
+    }
+  },
+  "result": {
+    "id": "bagtabs:bag"
+  }
+}

src/main/resources/data/minecraft/tags/item/dyeable.json

@@ -0,0 +1,6 @@
+{
+  "replace": false,
+  "values": [
+    "bagtabs:bag"
+  ]
+}

src/main/templates/META-INF/neoforge.mods.toml

@@ -0,0 +1,95 @@
+# This is an example neoforge.mods.toml file. It contains the data relating to the loading mods.
+# There are several mandatory fields (#mandatory), and many more that are optional (#optional).
+# The overall format is standard TOML format, v0.5.0.
+# Note that there are a couple of TOML lists in this file.
+# Find more information on toml format here:  https://github.com/toml-lang/toml
+
+# The name of the mod loader type to load - for regular FML @Mod mods it should be javafml
+modLoader="javafml" #mandatory
+
+# A version range to match for said mod loader - for regular FML @Mod it will be the FML version. This is currently 2.
+loaderVersion="${loader_version_range}" #mandatory
+
+# The license for you mod. This is mandatory metadata and allows for easier comprehension of your redistributive properties.
+# Review your options at https://choosealicense.com/. All rights reserved is the default copyright stance, and is thus the default here.
+license="${mod_license}"
+
+# A URL to refer people to when problems occur with this mod
+#issueTrackerURL="https://change.me.to.your.issue.tracker.example.invalid/" #optional
+
+# A list of mods - how many allowed here is determined by the individual mod loader
+[[mods]] #mandatory
+
+# The modid of the mod
+modId="${mod_id}" #mandatory
+
+# The version number of the mod
+version="${mod_version}" #mandatory
+
+# A display name for the mod
+displayName="${mod_name}" #mandatory
+
+# A URL to query for updates for this mod. See the JSON update specification https://docs.neoforged.net/docs/misc/updatechecker/
+#updateJSONURL="https://change.me.example.invalid/updates.json" #optional
+
+# A URL for the "homepage" for this mod, displayed in the mod UI
+#displayURL="https://change.me.to.your.mods.homepage.example.invalid/" #optional
+
+# A file name (in the root of the mod JAR) containing a logo for display
+#logoFile="examplemod.png" #optional
+
+# A text field displayed in the mod UI
+#credits="" #optional
+
+# The authors of the mod, displayed in the mod UI (optional)
+authors="trunksbomb"
+
+# The description text for the mod (multi line!) (#mandatory)
+description='''
+Tabs in the player inventory for all the bags and backpacks you're holding.
+'''
+
+# The [[mixins]] block allows you to declare your mixin config to FML so that it gets loaded.
+#[[mixins]]
+#config="${mod_id}.mixins.json"
+
+# The [[accessTransformers]] block allows you to declare where your AT file is.
+# If this block is omitted, a fallback attempt will be made to load an AT from META-INF/accesstransformer.cfg
+#[[accessTransformers]]
+#file="META-INF/accesstransformer.cfg"
+
+# The coremods config file path is not configurable and is always loaded from META-INF/coremods.json
+
+# A dependency - use the . to indicate dependency for a specific modid. Dependencies are optional.
+[[dependencies.${mod_id}]] #optional
+    # the modid of the dependency
+    modId="neoforge" #mandatory
+    # The type of the dependency. Can be one of "required", "optional", "incompatible" or "discouraged" (case insensitive).
+    # 'required' requires the mod to exist, 'optional' does not
+    # 'incompatible' will prevent the game from loading when the mod exists, and 'discouraged' will show a warning
+    type="required" #mandatory
+    # Optional field describing why the dependency is required or why it is incompatible
+    # reason="..."
+    # The version range of the dependency
+    versionRange="[${neo_version},)" #mandatory
+    # An ordering relationship for the dependency.
+    # BEFORE - This mod is loaded BEFORE the dependency
+    # AFTER - This mod is loaded AFTER the dependency
+    ordering="NONE"
+    # Side this dependency is applied on - BOTH, CLIENT, or SERVER
+    side="BOTH"
+
+# Here's another dependency
+[[dependencies.${mod_id}]]
+    modId="minecraft"
+    type="required"
+    # This version range declares a minimum of the current minecraft version up to but not including the next major version
+    versionRange="${minecraft_version_range}"
+    ordering="NONE"
+    side="BOTH"
+
+# Features are specific properties of the game environment, that you may want to declare you require. This example declares
+# that your mod requires GL version 3.2 or higher. Other features will be added. They are side aware so declaring this won't
+# stop your mod loading on the server for example.
+#[features.${mod_id}]
+#openGLVersion="[3.2,)"