Move clientserver code into a subproject

Left behind was `ConnectionFactory` as it is really a MapTool-specific tool for building connections and servers rather
than a part of the general client-server logic itself. Also pulled in was `Handshake` and `HandshakeObserver` since they
are used in the client-server and are an important part of the process (the implementations were left behind though).

Common build configurations wered moved into a `shared.gradle` file applied to the root project and
subprojects. Dependencies specific to the clientserver subproject were moved out of the root project to keep things
clear.

Author: kwvanderlinde

build.gradle

@@ -18,21 +18,23 @@ plugins {
     id "base"
     id "java"
     id "org.ajoberstar.grgit" version "5.2.1"
-    id "com.diffplug.spotless" version "6.25.0"
     id 'org.openjfx.javafxplugin' version '0.0.13'
     id 'org.beryx.runtime' version '1.13.0'
     id "com.google.protobuf" version "0.9.4"
     id 'com.github.johnrengelman.shadow' version '8.1.1'
+
+    id "com.diffplug.spotless" version "6.25.0" apply false
+}
+
+allprojects {
+    apply plugin: "com.diffplug.spotless"
 }
 
+apply from: rootProject.file('buildSrc/shared.gradle')
+
 // Definitions
 defaultTasks 'clean', 'build'
 
-java {
-    sourceCompatibility = JavaVersion.VERSION_21
-    targetCompatibility = JavaVersion.VERSION_21
-}
-
 def javaArgs = [
         "-Xss8M", "-Dsun.java2d.d3d=false", "-Dsentry.environment=Production", "-Dfile.encoding=UTF-8",
         "-Dpolyglot.engine.WarnInterpreterOnly=false",
@@ -112,32 +114,18 @@ ext {
     println "OS Detected: " + osdetector.os
 }
 
+
 spotless {
     java {
-        target project.fileTree(project.rootDir) {
+        target project.fileTree(project.projectDir) {
             include 'src/**/*.java'
             exclude '**/JTextAreaAppender.java'
             exclude 'src/main/java/net/rptools/maptool/client/ui/themes/Flat*ContrastIJTheme.java'
             exclude 'src/main/java/net/rptools/maptool/client/ui/themes/Utils.java'
         }
-        licenseHeaderFile 'spotless.license.java'
-        toggleOffOn()
-
-        // Now using the Google Java style guide
-        googleJavaFormat("1.17.0")
-    }
-
-    format 'misc', {
-        target '**/*.gradle', '**/.gitignore'
-
-        // spotless has built-in rules for most basic formatting tasks
-        trimTrailingWhitespace()
-        // or spaces. Takes an integer argument if you don't like 4
-        indentWithSpaces(4)
     }
 }
 
-
 // org.openjfx.javafxplugin
 javafx {
     version = '22'
@@ -325,23 +313,13 @@ runtime {
         }
     }
 }
-// In this section you declare where to find the dependencies of your project
-repositories {
-    // Use 'jcenter' for resolving your dependencies.
-    // You can declare any Maven/Ivy/file repository here.
-    mavenLocal()
-    mavenCentral()
-    maven { url = 'https://maptool.craigs-stuff.net/repo/' }
-    maven { url = 'https://jitpack.io' }
-    maven { url "https://www.jetbrains.com/intellij-repository/releases" }
-    maven { url "https://cache-redirector.jetbrains.com/intellij-dependencies" }
-}
-
 
 // In this section you declare the dependencies for your production and test code
 dependencies {
     forms group: 'com.jetbrains.intellij.java', name: 'java-compiler-ant-tasks', version: '233.14475.56'
 
+    implementation project(':clientserver')
+
     implementation group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.22.1'
     implementation group: 'org.apache.logging.log4j', name: 'log4j-api', version: '2.22.1'
     implementation group: 'org.apache.logging.log4j', name: 'log4j-1.2-api', version: '2.20.0'	// Bridges v1 to v2 for other code in other libs
@@ -492,16 +470,6 @@ dependencies {
     // Noise Generator
     implementation 'com.github.cwisniew:NoiseLib:1.0.0' // The most recent version, 1.0.0 is build for a later java version: major version 55 is newer than 54, the highest major version supported by this compiler
 
-    // webrtc
-    implementation group: 'org.java-websocket', name: 'Java-WebSocket', version: '1.5.6'
-    implementation 'dev.onvoid.webrtc:webrtc-java:0.8.0'
-    if (osdetector.os.is('windows'))
-        implementation 'dev.onvoid.webrtc:webrtc-java:0.8.0:windows-x86_64'
-    else if (osdetector.os.is('osx'))
-        implementation 'dev.onvoid.webrtc:webrtc-java:0.8.0:macos-x86_64'
-    else if (osdetector.os.is('linux'))
-        implementation 'dev.onvoid.webrtc:webrtc-java:0.8.0:linux-x86_64'
-
     // protobuf
     implementation "io.grpc:grpc-protobuf:1.61.1"
     implementation "com.google.protobuf:protobuf-java-util:3.25.2"
@@ -516,9 +484,6 @@ dependencies {
     implementation 'org.jsoup:jsoup:1.17.2'
     // eventbus
     implementation 'com.google.guava:guava:33.0.0-jre'
-    // compression of messages between client and server
-    implementation 'org.apache.commons:commons-compress:1.26.0'
-    implementation 'com.github.luben:zstd-jni:1.5.5-11'
     // intellij forms runtime
     implementation 'com.jetbrains.intellij.java:java-gui-forms-rt:241.12019'
     // layout for forms created in code

buildSrc/shared.gradle

@@ -0,0 +1,35 @@
+// In this section you declare where to find the dependencies of your project
+repositories {
+    mavenLocal()
+    mavenCentral()
+    maven { url = 'https://maptool.craigs-stuff.net/repo/' }
+    maven { url = 'https://jitpack.io' }
+    maven { url "https://www.jetbrains.com/intellij-repository/releases" }
+    maven { url "https://cache-redirector.jetbrains.com/intellij-dependencies" }
+}
+
+java {
+    sourceCompatibility = JavaVersion.VERSION_21
+    targetCompatibility = JavaVersion.VERSION_21
+}
+
+spotless {
+    java {
+        target project.fileTree(project.projectDir) {
+            include 'src/**/*.java'
+        }
+        licenseHeaderFile rootProject.file('spotless.license.java')
+        toggleOffOn()
+        // Now using the Google Java style guide
+        googleJavaFormat("1.17.0")
+    }
+
+    format 'misc', {
+        target '**/*.gradle', '**/.gitignore'
+
+        // spotless has built-in rules for most basic formatting tasks
+        trimTrailingWhitespace()
+        // or spaces. Takes an integer argument if you don't like 4
+        indentWithSpaces(4)
+    }
+}

clientserver/build.gradle

@@ -0,0 +1,33 @@
+plugins {
+    id "base"
+    id "java-library"
+}
+
+apply from: rootProject.file('buildSrc/shared.gradle')
+
+// In this section you declare the dependencies for your production and test code
+dependencies {
+    implementation group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.22.1'
+    implementation group: 'org.apache.logging.log4j', name: 'log4j-api', version: '2.22.1'
+    implementation group: 'org.apache.logging.log4j', name: 'log4j-1.2-api', version: '2.20.0'	// Bridges v1 to v2 for other code in other libs
+    implementation group: 'org.slf4j', name: 'slf4j-simple', version: '2.0.12'
+    implementation group: 'commons-logging', name: 'commons-logging', version: '1.3.0'
+
+    // Better JSON functions...
+    implementation group: 'com.google.code.gson', name: 'gson', version: '2.10.1'		// https://mvnrepository.com/artifact/com.google.code.gson/gson
+
+    // webrtc
+    implementation group: 'org.java-websocket', name: 'Java-WebSocket', version: '1.5.6'
+    // Needs to be API since WebRTCConnection implements PeerConnectionObserver and RTCDataChannelObserver.
+    implementation 'dev.onvoid.webrtc:webrtc-java:0.8.0'
+    if (osdetector.os.is('windows'))
+        implementation 'dev.onvoid.webrtc:webrtc-java:0.8.0:windows-x86_64'
+    else if (osdetector.os.is('osx'))
+        implementation 'dev.onvoid.webrtc:webrtc-java:0.8.0:macos-x86_64'
+    else if (osdetector.os.is('linux'))
+        implementation 'dev.onvoid.webrtc:webrtc-java:0.8.0:linux-x86_64'
+
+    // compression of messages between client and server
+    implementation 'org.apache.commons:commons-compress:1.26.0'
+    implementation 'com.github.luben:zstd-jni:1.5.5-11'
+}

src/main/java/net/rptools/clientserver/ActivityListener.java renamed to clientserver/src/main/java/net/rptools/clientserver/ActivityListener.java

@@ -12,7 +12,7 @@
  * <http://www.gnu.org/licenses/> and specifically the Affero license
  * text at <http://www.gnu.org/licenses/agpl.html>.
  */
-package net.rptools.maptool.server;
+package net.rptools.clientserver.simple;
 
 import java.util.concurrent.ExecutionException;
 import net.rptools.clientserver.simple.connection.Connection;

src/main/java/net/rptools/clientserver/simple/DisconnectHandler.java renamed to clientserver/src/main/java/net/rptools/clientserver/simple/DisconnectHandler.java

@@ -12,7 +12,7 @@
  * <http://www.gnu.org/licenses/> and specifically the Affero license
  * text at <http://www.gnu.org/licenses/agpl.html>.
  */
-package net.rptools.maptool.server;
+package net.rptools.clientserver.simple;
 
 public interface HandshakeObserver {