Add server & shared module and remove the serveur from the client app.

build.gradle.kts

@@ -1,9 +1,7 @@
 plugins {
-    // this is necessary to avoid the plugins to be loaded multiple times
-    // in each subproject's classloader
-    alias(libs.plugins.kotlinMultiplatform) apply false
-    alias(libs.plugins.kotlinSerialization) apply false
-    // alias(libs.plugins.kotlinKtor) apply false
     alias(libs.plugins.composeMultiplatform) apply false
+    alias(libs.plugins.kotlinSerialization) apply false
     alias(libs.plugins.composeCompiler) apply false
+    alias(libs.plugins.kotlinJvm) apply false
+    alias(libs.plugins.kotlinMultiplatform) apply false
 }

composeApp/build.gradle.kts

@@ -29,16 +29,15 @@ kotlin {
             api(libs.koin.core)
             implementation(libs.koin.compose)
             implementation(libs.koin.compose.viewmodel)
-            // network.
+            // common
+            implementation(projects.shared)
+            // network
             implementation(libs.kotlinx.serialization.json)
             implementation(libs.ktor.client.core)
             implementation(libs.ktor.client.cio)
             implementation(libs.ktor.client.websockets)
-            implementation(libs.ktor.server.core)
-            implementation(libs.ktor.server.netty)
-            implementation(libs.ktor.server.websockets)
             // shell
-            implementation(libs.lordcodes.turttle)
+            implementation(libs.turtle)
         }
 
         commonTest.dependencies {

composeApp/src/commonMain/composeResources/values/strings.xml

@@ -136,7 +136,6 @@
     <string name="network__host__label">host</string>
     <string name="network__port__label">port</string>
     <string name="network__socket__connect_action">Se connecter à la table</string>
-    <string name="network__socket__host_action">Héberger la table</string>
     <string name="network__socket__disconnect_action">Se déconnecter</string>
     <string name="network__socket__status_state">État de connexion : %1$s</string>
     <string name="network__socket__status_connected">Connecté</string>

composeApp/src/commonMain/kotlin/com/pixelized/desktop/lwa/repository/network/NetworkRepository.kt

@@ -1,15 +1,17 @@
 package com.pixelized.desktop.lwa.repository.network
 
+//import com.pixelized.desktop.lwa.repository.network.helper.server
+//import io.ktor.server.engine.EmbeddedServer
+//import io.ktor.server.netty.NettyApplicationEngine
 import com.pixelized.desktop.lwa.repository.network.helper.client
 import com.pixelized.desktop.lwa.repository.network.helper.connectWebSocket
-import com.pixelized.desktop.lwa.repository.network.helper.server
+import com.pixelized.desktop.lwa.utils.extention.decodeFromFrame
-import com.pixelized.desktop.lwa.repository.network.protocol.Message
+import com.pixelized.desktop.lwa.utils.extention.encodeToFrame
-import com.pixelized.desktop.lwa.repository.network.protocol.MessageContent
+import com.pixelized.server.lwa.SERVER_PORT
+import com.pixelized.server.lwa.protocol.Message
+import com.pixelized.server.lwa.protocol.MessageContent
 import io.ktor.client.HttpClient
-import io.ktor.server.engine.EmbeddedServer
-import io.ktor.server.netty.NettyApplicationEngine
 import io.ktor.websocket.Frame
-import io.ktor.websocket.readText
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
@@ -21,20 +23,17 @@ import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.runBlocking
 import kotlinx.serialization.json.Json
-import kotlinx.serialization.json.encodeToJsonElement
 
-typealias Server = EmbeddedServer<NettyApplicationEngine, NettyApplicationEngine.Configuration>
 typealias Client = HttpClient
 
 class NetworkRepository {
     companion object {
-        const val DEFAULT_PORT = 16030
+        const val DEFAULT_PORT = SERVER_PORT
         const val DEFAULT_HOST = "pixelized.freeboxos.fr"
     }
 
     private val scope = CoroutineScope(Dispatchers.IO)
     private var networkJob: Job? = null
-    private var server: Server? = null
     private var client: Client? = null
 
     private val outgoingMessageBuffer = MutableSharedFlow<Message>()
@@ -47,65 +46,14 @@ class NetworkRepository {
     private val _status = MutableStateFlow(Status.DISCONNECTED)
     val status: StateFlow<Status> get() = _status
 
-    private val _type = MutableStateFlow(Type.NONE)
-    val type: StateFlow<Type> get() = _type
-
     fun onPlayerNameChange(player: String) {
         _player.value = player
     }
 
-    fun host(
-        port: Int,
-    ) {
-        _type.value = Type.SERVER
-        _status.value = Status.CONNECTED
-
-        server = server(port = port) {
-            println("Server launched")
-
-            val job = launch {
-                // send local message to the clients
-                outgoingMessageBuffer.collect { message ->
-                    send(Json.encodeToFrame(message = message))
-                }
-            }
-            runCatching {
-                // watching for clients incoming message
-                incoming.consumeEach { frame ->
-                    if (frame is Frame.Text) {
-                        val message = Json.decodeFromFrame(frame = frame)
-                        incomingMessageBuffer.emit(message)
-                        // broadcast to clients the message
-                        outgoingMessageBuffer.emit(message)
-                    }
-                }
-            }.onFailure { exception ->
-                // TODO
-                println("WebSocket exception: ${exception.localizedMessage}")
-            }.also {
-                job.cancel()
-            }
-        }
-
-        networkJob?.cancel()
-        networkJob = scope.launch {
-            try {
-                server?.start(wait = true)
-            } catch (exception: Exception) {
-                // TODO
-                println("WebSocket exception: ${exception.localizedMessage}")
-            } finally {
-                println("Server close")
-                _type.value = Type.NONE
-                _status.value = Status.DISCONNECTED
-            }
-        }
-    }
-
     fun connect(
         host: String,
         port: Int,
-        onConnect: (Type) -> Unit = { },
+        onConnect: () -> Unit = { },
         onFailure: (Exception) -> Unit = { },
         onClose: () -> Unit = { },
     ) {
@@ -115,9 +63,8 @@ class NetworkRepository {
         networkJob = scope.launch {
             try {
                 client?.connectWebSocket(host = host, port = port) {
-                    _type.value = Type.CLIENT
                     _status.value = Status.CONNECTED
-                    onConnect(Type.CLIENT)
+                    onConnect()
 
                     val job = launch {
                         // send message to the server
@@ -140,7 +87,6 @@ class NetworkRepository {
             } catch (exception: Exception) {
                 onFailure(exception)
             } finally {
-                _type.value = Type.NONE
                 _status.value = Status.DISCONNECTED
                 onClose()
             }
@@ -150,7 +96,6 @@ class NetworkRepository {
     fun disconnect() {
         networkJob?.cancel()
         scope.launch {
-            server?.stop()
             client?.close()
         }
     }
@@ -165,10 +110,6 @@ class NetworkRepository {
             )
             // emit the message into the outgoing buffer
             outgoingMessageBuffer.emit(message)
-            // emit the message into the incoming buffer IF we are the server
-            if (type.value == Type.SERVER) {
-                incomingMessageBuffer.emit(message)
-            }
         }
     }
 
@@ -176,20 +117,4 @@ class NetworkRepository {
         CONNECTED,
         DISCONNECTED
     }
-
-    enum class Type {
-        CLIENT,
-        SERVER,
-        NONE,
-    }
-}
-
-private fun Json.decodeFromFrame(frame: Frame.Text): Message {
-    val json = frame.readText()
-    return decodeFromString<Message>(json)
-}
-
-private fun Json.encodeToFrame(message: Message): Frame {
-    val json = encodeToJsonElement(message)
-    return Frame.Text(text = json.toString())
 }

composeApp/src/commonMain/kotlin/com/pixelized/desktop/lwa/repository/network/helper/Server.kt

@@ -1,39 +0,0 @@
-package com.pixelized.desktop.lwa.repository.network.helper
-
-import io.ktor.server.application.install
-import io.ktor.server.engine.EmbeddedServer
-import io.ktor.server.engine.embeddedServer
-import io.ktor.server.netty.Netty
-import io.ktor.server.netty.NettyApplicationEngine
-import io.ktor.server.routing.routing
-import io.ktor.server.websocket.DefaultWebSocketServerSession
-import io.ktor.server.websocket.WebSockets
-import io.ktor.server.websocket.pingPeriod
-import io.ktor.server.websocket.timeout
-import io.ktor.server.websocket.webSocket
-import kotlin.time.Duration.Companion.seconds
-
-// https://ktor.io/docs/server-websockets.html#handle-multiple-session
-fun server(
-    port: Int,
-    handler: suspend DefaultWebSocketServerSession.() -> Unit
-): EmbeddedServer<NettyApplicationEngine, NettyApplicationEngine.Configuration> {
-    return embeddedServer(
-        factory = Netty,
-        port = port,
-        module = {
-            install(WebSockets) {
-                pingPeriod = 15.seconds
-                timeout = 15.seconds
-                maxFrameSize = Long.MAX_VALUE
-                masking = false
-            }
-            routing {
-                webSocket(
-                    path = "/ws",
-                    handler = handler,
-                )
-            }
-        },
-    )
-}

composeApp/src/commonMain/kotlin/com/pixelized/desktop/lwa/repository/roll_history/RollHistoryRepository.kt

@@ -1,8 +1,8 @@
 package com.pixelized.desktop.lwa.repository.roll_history
 
 import com.pixelized.desktop.lwa.repository.network.NetworkRepository
-import com.pixelized.desktop.lwa.repository.network.protocol.Message
+import com.pixelized.server.lwa.protocol.Message
-import com.pixelized.desktop.lwa.repository.network.protocol.RollMessage
+import com.pixelized.server.lwa.protocol.RollMessage
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.SharedFlow

composeApp/src/commonMain/kotlin/com/pixelized/desktop/lwa/screen/network/NetworkFactory.kt

@@ -1,14 +1,12 @@
 package com.pixelized.desktop.lwa.screen.network
 
 import com.pixelized.desktop.lwa.repository.network.NetworkRepository.Status
-import com.pixelized.desktop.lwa.repository.network.NetworkRepository.Type
 
 class NetworkFactory {
 
     fun convertToUio(
         player: String,
         status: Status,
-        type: Type,
         host: String,
         port: Int,
     ): NetworkPageUio {
@@ -18,7 +16,7 @@ class NetworkFactory {
             port = "$port",
             enableFields = status == Status.DISCONNECTED,
             enableActions = status == Status.DISCONNECTED && player.isNotBlank() && host.isNotBlank() && port > 0,
-            enableCancel = type != Type.NONE && status == Status.CONNECTED
+            enableCancel = status == Status.CONNECTED
         )
     }
 }

composeApp/src/commonMain/kotlin/com/pixelized/desktop/lwa/screen/network/NetworkPage.kt

@@ -48,11 +48,9 @@ import lwacharactersheet.composeapp.generated.resources.network__player_name__la
 import lwacharactersheet.composeapp.generated.resources.network__port__label
 import lwacharactersheet.composeapp.generated.resources.network__socket__connect_action
 import lwacharactersheet.composeapp.generated.resources.network__socket__disconnect_action
-import lwacharactersheet.composeapp.generated.resources.network__socket__host_action
 import lwacharactersheet.composeapp.generated.resources.network__title
 import org.jetbrains.compose.resources.stringResource
 import org.koin.compose.viewmodel.koinViewModel
-import org.koin.core.annotation.KoinExperimentalAPI
 
 @Stable
 data class NetworkPageUio(
@@ -64,7 +62,6 @@ data class NetworkPageUio(
     val enableCancel: Boolean,
 )
 
-@OptIn(KoinExperimentalAPI::class)
 @Composable
 fun NetworkPage(
     viewModel: NetworkViewModel = koinViewModel(),
@@ -91,7 +88,6 @@ fun NetworkPage(
                     onHostChange = viewModel::onHostChange,
                     onPortChange = viewModel::onPortChange,
                     onConnect = viewModel::connect,
-                    onHost = viewModel::host,
                     onDisconnect = viewModel::disconnect,
                 )
             }
@@ -133,7 +129,6 @@ private fun NetworkContent(
     onHostChange: (String) -> Unit,
     onPortChange: (String) -> Unit,
     onConnect: () -> Unit,
-    onHost: () -> Unit,
     onDisconnect: () -> Unit,
 ) {
     Scaffold(
@@ -207,13 +202,6 @@ private fun NetworkContent(
                     Text(text = stringResource(Res.string.network__socket__connect_action))
                 }
 
-                TextButton(
-                    enabled = player.value.enableActions,
-                    onClick = onHost,
-                ) {
-                    Text(text = stringResource(Res.string.network__socket__host_action))
-                }
-
                 TextButton(
                     enabled = player.value.enableCancel,
                     onClick = onDisconnect,

composeApp/src/commonMain/kotlin/com/pixelized/desktop/lwa/screen/network/NetworkViewModel.kt

@@ -20,7 +20,6 @@ class NetworkViewModel(
     private val repository: NetworkRepository,
     private val factory: NetworkFactory
 ) : ViewModel() {
-
     private val host = mutableStateOf(NetworkRepository.DEFAULT_HOST)
     private val port = mutableStateOf(NetworkRepository.DEFAULT_PORT)
 
@@ -41,13 +40,11 @@ class NetworkViewModel(
         get() {
             val player = repository.player.collectAsState()
             val status = repository.status.collectAsState()
-            val type = repository.type.collectAsState()
             return remember {
                 derivedStateOf {
                     factory.convertToUio(
                         player = player.value,
                         status = status.value,
-                        type = type.value,
                         host = host.value,
                         port = port.value,
                     )
@@ -67,10 +64,6 @@ class NetworkViewModel(
         this.host.value = host
     }
 
-    fun host() {
-        repository.host(port = port.value)
-    }
-
     fun connect() {
         controller.show()
         _isLoading.value = true

composeApp/src/commonMain/kotlin/com/pixelized/desktop/lwa/screen/rollhistory/RollHistoryViewModel.kt

@@ -4,7 +4,7 @@ import androidx.compose.runtime.State
 import androidx.compose.runtime.mutableStateOf
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
-import com.pixelized.desktop.lwa.repository.network.protocol.RollMessage
+import com.pixelized.server.lwa.protocol.RollMessage
 import com.pixelized.desktop.lwa.repository.roll_history.RollHistoryRepository
 import kotlinx.coroutines.launch
 

composeApp/src/commonMain/kotlin/com/pixelized/desktop/lwa/utils/extention/JsonExt.kt

@@ -0,0 +1,17 @@
+package com.pixelized.desktop.lwa.utils.extention
+
+import com.pixelized.server.lwa.protocol.Message
+import io.ktor.websocket.Frame
+import io.ktor.websocket.readText
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.json.encodeToJsonElement
+
+fun Json.decodeFromFrame(frame: Frame.Text): Message {
+    val json = frame.readText()
+    return decodeFromString<Message>(json)
+}
+
+fun Json.encodeToFrame(message: Message): Frame {
+    val json = encodeToJsonElement(message)
+    return Frame.Text(text = json.toString())
+}

gradle.properties

@@ -3,4 +3,7 @@ kotlin.code.style=official
 kotlin.daemon.jvmargs=-Xmx2048M
 
 #Gradle
-org.gradle.jvmargs=-Xmx2048M -Dfile.encoding=UTF-8
+org.gradle.jvmargs=-Xmx4096M -Dfile.encoding=UTF-8
+
+#Ktor
+io.ktor.development=true

gradle/libs.versions.toml

@@ -5,14 +5,19 @@ kotlinx-json = "1.7.3"
 compose-multiplatform = "1.7.0"
 androidx-lifecycle = "2.8.3"
 androidx-navigation = "2.8.0-alpha10"
-ktor_version = "3.0.0"
+ktor = "3.0.1"
 koin = "4.0.0"
+turtle = "0.5.0"
+logback = "1.5.11"
+
 
 [plugins]
 composeMultiplatform = { id = "org.jetbrains.compose", version.ref = "compose-multiplatform" }
 composeCompiler = { id = "org.jetbrains.kotlin.plugin.compose", version.ref = "kotlin" }
+kotlinJvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
 kotlinSerialization = { id = "org.jetbrains.kotlin.plugin.serialization", version.ref = "kotlin" }
 kotlinMultiplatform = { id = "org.jetbrains.kotlin.multiplatform", version.ref = "kotlin" }
+ktor = { id = "io.ktor.plugin", version.ref = "ktor" }
 
 [libraries]
 kotlin-test = { module = "org.jetbrains.kotlin:kotlin-test", version.ref = "kotlin" }
@@ -29,11 +34,12 @@ koin-core = { module = "io.insert-koin:koin-core", version.ref = "koin" }
 koin-compose = { module = "io.insert-koin:koin-compose", version.ref = "koin" }
 koin-compose-viewmodel = { module = "io.insert-koin:koin-compose-viewmodel", version.ref = "koin" }
 
-ktor-client-core = { group = "io.ktor", name = "ktor-client-core", version.ref = "ktor_version" }
+ktor-client-core = { group = "io.ktor", name = "ktor-client-core", version.ref = "ktor" }
-ktor-client-cio = { group = 'io.ktor', name = "ktor-client-cio", version.ref = "ktor_version" }
+ktor-client-cio = { group = 'io.ktor', name = "ktor-client-cio", version.ref = "ktor" }
-ktor-client-websockets = { group = 'io.ktor', name = "ktor-client-websockets", version.ref = "ktor_version" }
+ktor-client-websockets = { group = 'io.ktor', name = "ktor-client-websockets", version.ref = "ktor" }
-ktor-server-core = { group = 'io.ktor', name = "ktor-server-core", version.ref = "ktor_version" }
+ktor-server-core = { group = 'io.ktor', name = "ktor-server-core", version.ref = "ktor" }
-ktor-server-netty = { group = 'io.ktor', name = "ktor-server-netty", version.ref = "ktor_version" }
+ktor-server-netty = { group = 'io.ktor', name = "ktor-server-netty", version.ref = "ktor" }
-ktor-server-websockets = { group = 'io.ktor', name = "ktor-server-websockets", version.ref = "ktor_version" }
+ktor-server-websockets = { group = 'io.ktor', name = "ktor-server-websockets", version.ref = "ktor" }
 
-lordcodes-turttle = { group="com.lordcodes.turtle", name="turtle", version="0.5.0"}
+turtle = { group = "com.lordcodes.turtle", name = "turtle", version.ref = "turtle" }
+logback = { module = "ch.qos.logback:logback-classic", version.ref = "logback" }

server/.gitignore

@@ -1 +0,0 @@
-/build

server/build.gradle.kts

@@ -1,44 +1,23 @@
 plugins {
-    alias(libs.plugins.androidApplication)
+    alias(libs.plugins.kotlinJvm)
-    alias(libs.plugins.kotlinAndroid)
+    alias(libs.plugins.ktor)
+    alias(libs.plugins.kotlinSerialization)
+    application
 }
 
-android {
+group = "com.pixelized.server.lwa"
-    namespace = "com.pixelized.server"
+version = "1.0.0"
-    compileSdk = 34
 
-    defaultConfig {
+application {
-        applicationId = "com.pixelized.server"
+    mainClass.set("com.pixelized.server.lwa.ApplicationKt")
-        minSdk = 24
+    applicationDefaultJvmArgs = listOf("-Dio.ktor.development=${extra["io.ktor.development"] ?: "false"}")
-        targetSdk = 34
-        versionCode = 1
-        versionName = "1.0"
-
-        testInstrumentationRunner = "android.support.test.runner.AndroidJUnitRunner"
-    }
-
-    buildTypes {
-        release {
-            isMinifyEnabled = false
-            proguardFiles(
-                getDefaultProguardFile("proguard-android-optimize.txt"),
-                "proguard-rules.pro"
-            )
-        }
-    }
-    compileOptions {
-        sourceCompatibility = JavaVersion.VERSION_1_8
-        targetCompatibility = JavaVersion.VERSION_1_8
-    }
-    kotlinOptions {
-        jvmTarget = "1.8"
-    }
 }
 
 dependencies {
-
+    implementation(projects.shared)
-    implementation(libs.appcompat.v7)
+    implementation(libs.kotlinx.serialization.json)
-    testImplementation(libs.junit)
+    implementation(libs.logback)
-    androidTestImplementation(libs.runner)
+    implementation(libs.ktor.server.core)
-    androidTestImplementation(libs.espresso.core)
+    implementation(libs.ktor.server.netty)
+    implementation(libs.ktor.server.websockets)
 }

server/proguard-rules.pro

@@ -1,21 +0,0 @@
-# Add project specific ProGuard rules here.
-# You can control the set of applied configuration files using the
-# proguardFiles setting in build.gradle.
-#
-# For more details, see
-#   http://developer.android.com/guide/developing/tools/proguard.html
-
-# If your project uses WebView with JS, uncomment the following
-# and specify the fully qualified class name to the JavaScript interface
-# class:
-#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
-#   public *;
-#}
-
-# Uncomment this to preserve the line number information for
-# debugging stack traces.
-#-keepattributes SourceFile,LineNumberTable
-
-# If you keep the line number information, uncomment this to
-# hide the original source file name.
-#-renamesourcefileattribute SourceFile

server/src/androidTest/java/com/pixelized/server/ExampleInstrumentedTest.kt

@@ -1,24 +0,0 @@
-package com.pixelized.server
-
-import android.support.test.InstrumentationRegistry
-import android.support.test.runner.AndroidJUnit4
-
-import org.junit.Test
-import org.junit.runner.RunWith
-
-import org.junit.Assert.*
-
-/**
- * Instrumented test, which will execute on an Android device.
- *
- * See [testing documentation](http://d.android.com/tools/testing).
- */
-@RunWith(AndroidJUnit4::class)
-class ExampleInstrumentedTest {
-    @Test
-    fun useAppContext() {
-        // Context of the app under test.
-        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
-        assertEquals("com.pixelized.server", appContext.packageName)
-    }
-}

server/src/main/AndroidManifest.xml

@@ -1,12 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android">
-
-    <application
-        android:allowBackup="true"
-        android:icon="@mipmap/ic_launcher"
-        android:label="@string/app_name"
-        android:roundIcon="@mipmap/ic_launcher_round"
-        android:supportsRtl="true"
-        android:theme="@style/Theme.LwaCharacterSheet" />
-
-</manifest>

server/src/main/kotlin/com/pixelized/server/lwa/Application.kt

@@ -0,0 +1,7 @@
+package com.pixelized.server.lwa
+
+import com.pixelized.server.lwa.server.LocalServer
+
+fun main() {
+    LocalServer().create().start()
+}

server/src/main/kotlin/com/pixelized/server/lwa/extention/JsonExt.kt

@@ -0,0 +1,17 @@
+package com.pixelized.server.lwa.extention
+
+import com.pixelized.server.lwa.protocol.Message
+import io.ktor.websocket.Frame
+import io.ktor.websocket.readText
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.json.encodeToJsonElement
+
+fun Json.decodeFromFrame(frame: Frame.Text): Message {
+    val json = frame.readText()
+    return decodeFromString<Message>(json)
+}
+
+fun Json.encodeToFrame(message: Message): Frame {
+    val json = encodeToJsonElement(message)
+    return Frame.Text(text = json.toString())
+}

server/src/main/kotlin/com/pixelized/server/lwa/server/Server.kt

@@ -0,0 +1,101 @@
+package com.pixelized.server.lwa.server
+
+import com.pixelized.server.lwa.SERVER_PORT
+import com.pixelized.server.lwa.extention.decodeFromFrame
+import io.ktor.server.application.install
+import io.ktor.server.engine.EmbeddedServer
+import io.ktor.server.engine.embeddedServer
+import io.ktor.server.netty.Netty
+import io.ktor.server.netty.NettyApplicationEngine
+import io.ktor.server.routing.routing
+import io.ktor.server.websocket.DefaultWebSocketServerSession
+import io.ktor.server.websocket.WebSockets
+import io.ktor.server.websocket.pingPeriod
+import io.ktor.server.websocket.timeout
+import io.ktor.server.websocket.webSocket
+import io.ktor.websocket.Frame
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.channels.consumeEach
+import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.runBlocking
+import kotlinx.serialization.json.Json
+import kotlin.time.Duration.Companion.seconds
+
+// https://ktor.io/docs/server-websockets.html#handle-multiple-session
+typealias Server = EmbeddedServer<NettyApplicationEngine, NettyApplicationEngine.Configuration>
+
+class LocalServer {
+    private var server: Server? = null
+    private val scope = CoroutineScope(Dispatchers.IO)
+    private var networkJob: Job? = null
+    private val outgoingMessageBuffer = MutableSharedFlow<Frame>()
+
+    fun create(): LocalServer {
+        server = build {
+            println("Server launched")
+
+            val job = launch {
+                // send local message to the clients
+                outgoingMessageBuffer.collect { frame ->
+                    send(frame)
+                }
+            }
+            runCatching {
+                // watching for clients incoming message
+                incoming.consumeEach { frame ->
+                    if (frame is Frame.Text) {
+                        val message = Json.decodeFromFrame(frame = frame)
+                        println(message)
+                        // broadcast to clients the message
+                        outgoingMessageBuffer.emit(frame)
+                    }
+                }
+            }.onFailure { exception ->
+                println("WebSocket exception: ${exception.localizedMessage}")
+            }.also {
+                job.cancel()
+            }
+        }
+        return this
+    }
+
+    fun start() {
+        runBlocking {
+            try {
+                server?.start(wait = true)
+            } catch (exception: Exception) {
+                // TODO
+                println("WebSocket exception: ${exception.localizedMessage}")
+            } finally {
+                println("Server close")
+            }
+        }
+    }
+
+    private fun build(
+        port: Int = SERVER_PORT,
+        handler: suspend DefaultWebSocketServerSession.() -> Unit
+    ): EmbeddedServer<NettyApplicationEngine, NettyApplicationEngine.Configuration> {
+        return embeddedServer(
+            factory = Netty,
+            port = port,
+            module = {
+                install(WebSockets) {
+                    pingPeriod = 15.seconds
+                    timeout = 15.seconds
+                    maxFrameSize = Long.MAX_VALUE
+                    masking = false
+                }
+                routing {
+                    webSocket(
+                        path = "/ws",
+                        handler = handler,
+                    )
+                }
+            },
+        )
+    }
+}

server/src/main/res/drawable/ic_launcher_background.xml

@@ -1,170 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="108dp"
-    android:height="108dp"
-    android:viewportWidth="108"
-    android:viewportHeight="108">
-    <path
-        android:fillColor="#3DDC84"
-        android:pathData="M0,0h108v108h-108z" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M9,0L9,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,0L19,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M29,0L29,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M39,0L39,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M49,0L49,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M59,0L59,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M69,0L69,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M79,0L79,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M89,0L89,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M99,0L99,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,9L108,9"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,19L108,19"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,29L108,29"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,39L108,39"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,49L108,49"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,59L108,59"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,69L108,69"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,79L108,79"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,89L108,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,99L108,99"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,29L89,29"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,39L89,39"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,49L89,49"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,59L89,59"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,69L89,69"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,79L89,79"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M29,19L29,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M39,19L39,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M49,19L49,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M59,19L59,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M69,19L69,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M79,19L79,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-</vector>

server/src/main/res/drawable/ic_launcher_foreground.xml

@@ -1,30 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:aapt="http://schemas.android.com/aapt"
-    android:width="108dp"
-    android:height="108dp"
-    android:viewportWidth="108"
-    android:viewportHeight="108">
-    <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
-        <aapt:attr name="android:fillColor">
-            <gradient
-                android:endX="85.84757"
-                android:endY="92.4963"
-                android:startX="42.9492"
-                android:startY="49.59793"
-                android:type="linear">
-                <item
-                    android:color="#44000000"
-                    android:offset="0.0" />
-                <item
-                    android:color="#00000000"
-                    android:offset="1.0" />
-            </gradient>
-        </aapt:attr>
-    </path>
-    <path
-        android:fillColor="#FFFFFF"
-        android:fillType="nonZero"
-        android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
-        android:strokeWidth="1"
-        android:strokeColor="#00000000" />
-</vector>

server/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@drawable/ic_launcher_background" />
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
-    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
-</adaptive-icon>

server/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@drawable/ic_launcher_background" />
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
-    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
-</adaptive-icon>

server/src/main/res/values-night/themes.xml

@@ -1,10 +0,0 @@
-<resources xmlns:tools="http://schemas.android.com/tools">
-    <!-- Base application theme. -->
-    <style name="Theme.LwaCharacterSheet" parent="Theme.AppCompat.Light.DarkActionBar">
-        <!-- Primary brand color. -->
-        <item name="colorPrimary">@color/purple_200</item>
-        <item name="colorPrimaryDark">@color/purple_700</item>
-        <item name="colorAccent">@color/teal_200</item>
-        <!-- Customize your theme here. -->
-    </style>
-</resources>

server/src/main/res/values/colors.xml

@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <color name="purple_200">#FFBB86FC</color>
-    <color name="purple_500">#FF6200EE</color>
-    <color name="purple_700">#FF3700B3</color>
-    <color name="teal_200">#FF03DAC5</color>
-    <color name="teal_700">#FF018786</color>
-    <color name="black">#FF000000</color>
-    <color name="white">#FFFFFFFF</color>
-</resources>

server/src/main/res/values/strings.xml

@@ -1,3 +0,0 @@
-<resources>
-    <string name="app_name">server</string>
-</resources>

server/src/main/res/values/themes.xml

@@ -1,10 +0,0 @@
-<resources xmlns:tools="http://schemas.android.com/tools">
-    <!-- Base application theme. -->
-    <style name="Theme.LwaCharacterSheet" parent="Theme.AppCompat.Light.DarkActionBar">
-        <!-- Primary brand color. -->
-        <item name="colorPrimary">@color/purple_500</item>
-        <item name="colorPrimaryDark">@color/purple_700</item>
-        <item name="colorAccent">@color/teal_200</item>
-        <!-- Customize your theme here. -->
-    </style>
-</resources>

server/src/main/resources/logback.xml

@@ -0,0 +1,12 @@
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{YYYY-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
+        </encoder>
+    </appender>
+    <root level="trace">
+        <appender-ref ref="STDOUT"/>
+    </root>
+    <logger name="org.eclipse.jetty" level="INFO"/>
+    <logger name="io.netty" level="INFO"/>
+</configuration>

server/src/test/java/com/pixelized/server/ExampleUnitTest.kt

@@ -1,17 +0,0 @@
-package com.pixelized.server
-
-import org.junit.Test
-
-import org.junit.Assert.*
-
-/**
- * Example local unit test, which will execute on the development machine (host).
- *
- * See [testing documentation](http://d.android.com/tools/testing).
- */
-class ExampleUnitTest {
-    @Test
-    fun addition_isCorrect() {
-        assertEquals(4, 2 + 2)
-    }
-}

settings.gradle.kts

@@ -29,3 +29,5 @@ dependencyResolutionManagement {
 }
 
 include(":composeApp")
+include(":server")
+include(":shared")

shared/build.gradle.kts

@@ -0,0 +1,15 @@
+plugins {
+    alias(libs.plugins.kotlinMultiplatform)
+    alias(libs.plugins.kotlinSerialization)
+}
+
+kotlin {
+    jvm()
+    
+    sourceSets {
+        commonMain.dependencies {
+            implementation(libs.kotlinx.serialization.json)
+        }
+    }
+}
+

shared/src/commonMain/kotlin/com/pixelized/server/lwa/Constants.kt

@@ -0,0 +1,3 @@
+package com.pixelized.server.lwa
+
+const val SERVER_PORT = 16030

shared/src/commonMain/kotlin/com/pixelized/server/lwa/protocol/Message.kt

@@ -1,4 +1,4 @@
-package com.pixelized.desktop.lwa.repository.network.protocol
+package com.pixelized.server.lwa.protocol
 
 import kotlinx.serialization.Serializable
 

shared/src/commonMain/kotlin/com/pixelized/server/lwa/protocol/MessageContent.kt

@@ -1,4 +1,4 @@
-package com.pixelized.desktop.lwa.repository.network.protocol
+package com.pixelized.server.lwa.protocol
 
 import kotlinx.serialization.Serializable
 

shared/src/commonMain/kotlin/com/pixelized/server/lwa/protocol/RollMessage.kt

@@ -1,4 +1,4 @@
-package com.pixelized.desktop.lwa.repository.network.protocol
+package com.pixelized.server.lwa.protocol
 
 import kotlinx.serialization.Serializable