initial commit - source

2026-02-03 22:36:35 +01:00
1 parent 003b5501f0
commit e89bb29070
@@ -0,0 +1,79 @@
+import org.jetbrains.compose.desktop.application.dsl.TargetFormat
+
+plugins {
+    alias(libs.plugins.kotlinMultiplatform)
+    alias(libs.plugins.composeMultiplatform)
+    alias(libs.plugins.composeCompiler)
+    alias(libs.plugins.composeHotReload)
+    alias(libs.plugins.kotlinSerialization)
+    alias(libs.plugins.koin.compiler)
+    alias(masterLibs.plugins.versionPlugin)
+}
+
+group = "net.keinekekse.app"
+version = libs.versions.composeAppVersion.get()
+description = "Compose Multiplatform Test-Client"
+extra["displayname"] = "Books App"
+extra["copyright"] = "Copyright (c) 2026 Hartmut Bauer"
+
+kotlin {
+    jvm()
+
+//    @OptIn(ExperimentalWasmDsl::class)
+//    wasmJs {
+//        browser()
+//        binaries.executable()
+//    }
+
+    sourceSets {
+        commonMain.dependencies {
+            implementation(masterLibs.utilLibrary)
+            implementation(libs.bundles.kotlin.compose)
+            implementation(libs.ktor.client)
+            implementation(libs.ktor.clientCio)
+            implementation(libs.ktor.clientAuth)
+            implementation(libs.ktor.clientLogging)
+            implementation(libs.ktor.clientContentNegotiation)
+            implementation(libs.ktor.serializationJson)
+            implementation(libs.ktor.serverCore)
+            implementation(libs.ktor.serverCio)
+            implementation(project.dependencies.platform(libs.koin.bom))
+            implementation(libs.koin.core)
+            implementation(libs.koin.annotations)
+            implementation(libs.koin.compose)
+            implementation(libs.koin.compose.viewmodel)
+//            implementation(libs.koin.compose.viewmodel.navigation)
+            implementation(projects.shared)
+        }
+//        commonTest.dependencies {
+//            implementation(libs.kotlin.test)
+//        }
+        jvmMain.dependencies {
+            implementation(compose.desktop.currentOs)
+            implementation(libs.kotlinx.coroutinesSwing)
+            implementation(libs.ktor.clientJava)  // ??
+//            implementation(libs.ktor.serverCio)
+//            implementation(libs.ktor.serverCore)
+//            implementation(libs.ktor.serverNetty)
+            implementation(libs.ktor.serverAuthJwt) // nicht f. js, wasmJs
+        }
+//        wasmJsMain.dependencies {
+//            implementation(libs.ktor.clientJs)
+//        }
+
+    }
+    jvmToolchain(masterLibs.versions.javaVersion.get().toInt())
+}
+
+
+compose.desktop {
+    application {
+        mainClass = "net.keinekekse.app.MainKt"
+
+        nativeDistributions {
+            targetFormats(TargetFormat.Dmg, TargetFormat.Msi, TargetFormat.Deb)
+            packageName = project.name
+            packageVersion = project.version.toString()
+        }
+    }
+}
@@ -0,0 +1,3 @@
+#auto generated
+#Tue Feb 03 00:28:14 CET 2026
+build.number=174
@@ -0,0 +1,44 @@
+<vector
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:aapt="http://schemas.android.com/aapt"
+        android:width="450dp"
+        android:height="450dp"
+        android:viewportWidth="64"
+        android:viewportHeight="64">
+    <path
+            android:pathData="M56.25,18V46L32,60 7.75,46V18L32,4Z"
+            android:fillColor="#6075f2"/>
+    <path
+            android:pathData="m41.5,26.5v11L32,43V60L56.25,46V18Z"
+            android:fillColor="#6b57ff"/>
+    <path
+            android:pathData="m32,43 l-9.5,-5.5v-11L7.75,18V46L32,60Z">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                    android:centerX="23.131"
+                    android:centerY="18.441"
+                    android:gradientRadius="42.132"
+                    android:type="radial">
+                <item android:offset="0" android:color="#FF5383EC"/>
+                <item android:offset="0.867" android:color="#FF7F52FF"/>
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+            android:pathData="M22.5,26.5 L32,21 41.5,26.5 56.25,18 32,4 7.75,18Z">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                    android:startX="44.172"
+                    android:startY="4.377"
+                    android:endX="17.973"
+                    android:endY="34.035"
+                    android:type="linear">
+                <item android:offset="0" android:color="#FF33C3FF"/>
+                <item android:offset="0.878" android:color="#FF5383EC"/>
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+            android:pathData="m32,21 l9.526,5.5v11L32,43 22.474,37.5v-11z"
+            android:fillColor="#000000"/>
+</vector>
@@ -0,0 +1,86 @@
+package net.keinekekse.app
+
+import androidx.compose.animation.AnimatedVisibility
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.safeContentPadding
+import androidx.compose.material3.Button
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.tooling.preview.Preview
+import io.ktor.client.*
+import io.ktor.client.request.*
+import io.ktor.client.statement.*
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import net.keinekekse.app.books.generated.resources.Res
+import net.keinekekse.app.books.generated.resources.compose_multiplatform
+import net.keinekekse.app.books.ui.theme.AppTheme
+import org.jetbrains.compose.resources.painterResource
+import org.koin.compose.koinInject
+import org.koin.core.annotation.Single
+
+@Composable
+@Preview
+fun App() {
+    /*MaterialTheme*/
+    /*
+    eigenes Theme -> https://material-foundation.github.io/material-theme-builder/
+    den Download in den source code übernehmen (in Theme.kt sind Anpassungen nötig)
+    per default hat die generierte Klasse den Namen AppTheme.
+     */
+    AppTheme {
+        val test = koinInject<TestAuth>()
+        var showContent by remember { mutableStateOf(false) }
+        Column(
+            modifier = Modifier
+                .background(MaterialTheme.colorScheme.primaryContainer)
+                .safeContentPadding()
+                .fillMaxSize(),
+            horizontalAlignment = Alignment.CenterHorizontally,
+        ) {
+            Button(onClick = { showContent = !showContent }) {
+                Text("Click me!")
+
+            }
+            Button(onClick = {
+                CoroutineScope(Dispatchers.Default).launch {
+                    println("requesting '/test'")
+                    test.request("/test")
+                }
+            }) {
+                Text("Test Token Refresh")
+            }
+            AnimatedVisibility(showContent) {
+                val greeting = remember { Greeting().greet() }
+                Column(
+                    modifier = Modifier.fillMaxWidth(),
+                    horizontalAlignment = Alignment.CenterHorizontally,
+                ) {
+                    Image(painterResource(Res.drawable.compose_multiplatform), null)
+                    Text("Compose: $greeting")
+                }
+            }
+        }
+    }
+}
+
+@Single
+class TestAuth(val httpClient: HttpClient) {
+
+    private val srv = "https://kas.keinekekse.net/"
+    suspend fun request(url: String) {
+        println("connecting")
+        val response = httpClient.get(srv + url)
+        println("call to $url")
+        println(response.status)
+        println(response.bodyAsText())
+    }
+}
@@ -0,0 +1,18 @@
+package net.keinekekse.app.books
+
+import net.keinekekse.version.Version
+
+object VERSION: Version {
+    override val version = "1.0.0"
+    override val fullVersion = "1.0.0+build.174"
+    override val major = 1
+    override val minor = 0
+    override val patch = 0
+    override val preRelease = ""
+    override val buildMetadata = "build.174"
+    override val buildDate = "2026-02-02T23:28:14.786916Z"
+    override val displayName = "Books App"
+    override val copyright = "Copyright (c) 2026 Hartmut Bauer"
+    override val name = "books"
+    override val description = "Compose Multiplatform Test-Client"
+}
@@ -0,0 +1,6 @@
+package net.keinekekse.app.books.di
+
+import org.koin.core.annotation.KoinApplication
+
+@KoinApplication
+object KoinApp
@@ -0,0 +1,13 @@
+package net.keinekekse.app.books.di
+
+import org.koin.core.annotation.*
+
+@Module
+@Configuration
+@ComponentScan("net.keinekekse.app")
+class KoinModules {
+
+    @Named("AppString")
+    @Factory
+    fun provideSomeString() = "Injected App string"
+}
@@ -0,0 +1,219 @@
+package net.keinekekse.app.books.ui.theme
+
+import androidx.compose.ui.graphics.Color
+
+val primaryLight = Color(0xFF1C6585)
+val onPrimaryLight = Color(0xFFFFFFFF)
+val primaryContainerLight = Color(0xFFC3E8FF)
+val onPrimaryContainerLight = Color(0xFF004C69)
+val secondaryLight = Color(0xFF4E616D)
+val onSecondaryLight = Color(0xFFFFFFFF)
+val secondaryContainerLight = Color(0xFFD1E5F4)
+val onSecondaryContainerLight = Color(0xFF364955)
+val tertiaryLight = Color(0xFF605A7D)
+val onTertiaryLight = Color(0xFFFFFFFF)
+val tertiaryContainerLight = Color(0xFFE6DEFF)
+val onTertiaryContainerLight = Color(0xFF484264)
+val errorLight = Color(0xFFBA1A1A)
+val onErrorLight = Color(0xFFFFFFFF)
+val errorContainerLight = Color(0xFFFFDAD6)
+val onErrorContainerLight = Color(0xFF93000A)
+val backgroundLight = Color(0xFFF6FAFE)
+val onBackgroundLight = Color(0xFF181C1F)
+val surfaceLight = Color(0xFFF6FAFE)
+val onSurfaceLight = Color(0xFF181C1F)
+val surfaceVariantLight = Color(0xFFDCE3E9)
+val onSurfaceVariantLight = Color(0xFF41484D)
+val outlineLight = Color(0xFF71787D)
+val outlineVariantLight = Color(0xFFC0C7CD)
+val scrimLight = Color(0xFF000000)
+val inverseSurfaceLight = Color(0xFF2C3134)
+val inverseOnSurfaceLight = Color(0xFFEDF1F5)
+val inversePrimaryLight = Color(0xFF8FCEF3)
+val surfaceDimLight = Color(0xFFD6DADF)
+val surfaceBrightLight = Color(0xFFF6FAFE)
+val surfaceContainerLowestLight = Color(0xFFFFFFFF)
+val surfaceContainerLowLight = Color(0xFFF0F4F8)
+val surfaceContainerLight = Color(0xFFEAEEF2)
+val surfaceContainerHighLight = Color(0xFFE5E9ED)
+val surfaceContainerHighestLight = Color(0xFFDFE3E7)
+
+val primaryLightMediumContrast = Color(0xFF003B51)
+val onPrimaryLightMediumContrast = Color(0xFFFFFFFF)
+val primaryContainerLightMediumContrast = Color(0xFF307495)
+val onPrimaryContainerLightMediumContrast = Color(0xFFFFFFFF)
+val secondaryLightMediumContrast = Color(0xFF263844)
+val onSecondaryLightMediumContrast = Color(0xFFFFFFFF)
+val secondaryContainerLightMediumContrast = Color(0xFF5D707C)
+val onSecondaryContainerLightMediumContrast = Color(0xFFFFFFFF)
+val tertiaryLightMediumContrast = Color(0xFF373252)
+val onTertiaryLightMediumContrast = Color(0xFFFFFFFF)
+val tertiaryContainerLightMediumContrast = Color(0xFF6F688C)
+val onTertiaryContainerLightMediumContrast = Color(0xFFFFFFFF)
+val errorLightMediumContrast = Color(0xFF740006)
+val onErrorLightMediumContrast = Color(0xFFFFFFFF)
+val errorContainerLightMediumContrast = Color(0xFFCF2C27)
+val onErrorContainerLightMediumContrast = Color(0xFFFFFFFF)
+val backgroundLightMediumContrast = Color(0xFFF6FAFE)
+val onBackgroundLightMediumContrast = Color(0xFF181C1F)
+val surfaceLightMediumContrast = Color(0xFFF6FAFE)
+val onSurfaceLightMediumContrast = Color(0xFF0D1215)
+val surfaceVariantLightMediumContrast = Color(0xFFDCE3E9)
+val onSurfaceVariantLightMediumContrast = Color(0xFF30373C)
+val outlineLightMediumContrast = Color(0xFF4C5359)
+val outlineVariantLightMediumContrast = Color(0xFF676E73)
+val scrimLightMediumContrast = Color(0xFF000000)
+val inverseSurfaceLightMediumContrast = Color(0xFF2C3134)
+val inverseOnSurfaceLightMediumContrast = Color(0xFFEDF1F5)
+val inversePrimaryLightMediumContrast = Color(0xFF8FCEF3)
+val surfaceDimLightMediumContrast = Color(0xFFC3C7CB)
+val surfaceBrightLightMediumContrast = Color(0xFFF6FAFE)
+val surfaceContainerLowestLightMediumContrast = Color(0xFFFFFFFF)
+val surfaceContainerLowLightMediumContrast = Color(0xFFF0F4F8)
+val surfaceContainerLightMediumContrast = Color(0xFFE5E9ED)
+val surfaceContainerHighLightMediumContrast = Color(0xFFD9DDE1)
+val surfaceContainerHighestLightMediumContrast = Color(0xFFCED2D6)
+
+val primaryLightHighContrast = Color(0xFF003043)
+val onPrimaryLightHighContrast = Color(0xFFFFFFFF)
+val primaryContainerLightHighContrast = Color(0xFF004F6C)
+val onPrimaryContainerLightHighContrast = Color(0xFFFFFFFF)
+val secondaryLightHighContrast = Color(0xFF1C2E39)
+val onSecondaryLightHighContrast = Color(0xFFFFFFFF)
+val secondaryContainerLightHighContrast = Color(0xFF394C57)
+val onSecondaryContainerLightHighContrast = Color(0xFFFFFFFF)
+val tertiaryLightHighContrast = Color(0xFF2D2847)
+val onTertiaryLightHighContrast = Color(0xFFFFFFFF)
+val tertiaryContainerLightHighContrast = Color(0xFF4B4566)
+val onTertiaryContainerLightHighContrast = Color(0xFFFFFFFF)
+val errorLightHighContrast = Color(0xFF600004)
+val onErrorLightHighContrast = Color(0xFFFFFFFF)
+val errorContainerLightHighContrast = Color(0xFF98000A)
+val onErrorContainerLightHighContrast = Color(0xFFFFFFFF)
+val backgroundLightHighContrast = Color(0xFFF6FAFE)
+val onBackgroundLightHighContrast = Color(0xFF181C1F)
+val surfaceLightHighContrast = Color(0xFFF6FAFE)
+val onSurfaceLightHighContrast = Color(0xFF000000)
+val surfaceVariantLightHighContrast = Color(0xFFDCE3E9)
+val onSurfaceVariantLightHighContrast = Color(0xFF000000)
+val outlineLightHighContrast = Color(0xFF262D32)
+val outlineVariantLightHighContrast = Color(0xFF434A4F)
+val scrimLightHighContrast = Color(0xFF000000)
+val inverseSurfaceLightHighContrast = Color(0xFF2C3134)
+val inverseOnSurfaceLightHighContrast = Color(0xFFFFFFFF)
+val inversePrimaryLightHighContrast = Color(0xFF8FCEF3)
+val surfaceDimLightHighContrast = Color(0xFFB5B9BD)
+val surfaceBrightLightHighContrast = Color(0xFFF6FAFE)
+val surfaceContainerLowestLightHighContrast = Color(0xFFFFFFFF)
+val surfaceContainerLowLightHighContrast = Color(0xFFEDF1F5)
+val surfaceContainerLightHighContrast = Color(0xFFDFE3E7)
+val surfaceContainerHighLightHighContrast = Color(0xFFD1D5D9)
+val surfaceContainerHighestLightHighContrast = Color(0xFFC3C7CB)
+
+val primaryDark = Color(0xFF8FCEF3)
+val onPrimaryDark = Color(0xFF003549)
+val primaryContainerDark = Color(0xFF004C69)
+val onPrimaryContainerDark = Color(0xFFC3E8FF)
+val secondaryDark = Color(0xFFB5C9D7)
+val onSecondaryDark = Color(0xFF20333E)
+val secondaryContainerDark = Color(0xFF364955)
+val onSecondaryContainerDark = Color(0xFFD1E5F4)
+val tertiaryDark = Color(0xFFCAC1EA)
+val onTertiaryDark = Color(0xFF322C4C)
+val tertiaryContainerDark = Color(0xFF484264)
+val onTertiaryContainerDark = Color(0xFFE6DEFF)
+val errorDark = Color(0xFFFFB4AB)
+val onErrorDark = Color(0xFF690005)
+val errorContainerDark = Color(0xFF93000A)
+val onErrorContainerDark = Color(0xFFFFDAD6)
+val backgroundDark = Color(0xFF0F1417)
+val onBackgroundDark = Color(0xFFDFE3E7)
+val surfaceDark = Color(0xFF0F1417)
+val onSurfaceDark = Color(0xFFDFE3E7)
+val surfaceVariantDark = Color(0xFF41484D)
+val onSurfaceVariantDark = Color(0xFFC0C7CD)
+val outlineDark = Color(0xFF8A9297)
+val outlineVariantDark = Color(0xFF41484D)
+val scrimDark = Color(0xFF000000)
+val inverseSurfaceDark = Color(0xFFDFE3E7)
+val inverseOnSurfaceDark = Color(0xFF2C3134)
+val inversePrimaryDark = Color(0xFF1C6585)
+val surfaceDimDark = Color(0xFF0F1417)
+val surfaceBrightDark = Color(0xFF353A3D)
+val surfaceContainerLowestDark = Color(0xFF0A0F12)
+val surfaceContainerLowDark = Color(0xFF181C1F)
+val surfaceContainerDark = Color(0xFF1C2023)
+val surfaceContainerHighDark = Color(0xFF262B2E)
+val surfaceContainerHighestDark = Color(0xFF313539)
+
+val primaryDarkMediumContrast = Color(0xFFB5E2FF)
+val onPrimaryDarkMediumContrast = Color(0xFF00293A)
+val primaryContainerDarkMediumContrast = Color(0xFF5898BB)
+val onPrimaryContainerDarkMediumContrast = Color(0xFF000000)
+val secondaryDarkMediumContrast = Color(0xFFCBDFED)
+val onSecondaryDarkMediumContrast = Color(0xFF152832)
+val secondaryContainerDarkMediumContrast = Color(0xFF8093A0)
+val onSecondaryContainerDarkMediumContrast = Color(0xFF000000)
+val tertiaryDarkMediumContrast = Color(0xFFE0D7FF)
+val onTertiaryDarkMediumContrast = Color(0xFF272140)
+val tertiaryContainerDarkMediumContrast = Color(0xFF938CB2)
+val onTertiaryContainerDarkMediumContrast = Color(0xFF000000)
+val errorDarkMediumContrast = Color(0xFFFFD2CC)
+val onErrorDarkMediumContrast = Color(0xFF540003)
+val errorContainerDarkMediumContrast = Color(0xFFFF5449)
+val onErrorContainerDarkMediumContrast = Color(0xFF000000)
+val backgroundDarkMediumContrast = Color(0xFF0F1417)
+val onBackgroundDarkMediumContrast = Color(0xFFDFE3E7)
+val surfaceDarkMediumContrast = Color(0xFF0F1417)
+val onSurfaceDarkMediumContrast = Color(0xFFFFFFFF)
+val surfaceVariantDarkMediumContrast = Color(0xFF41484D)
+val onSurfaceVariantDarkMediumContrast = Color(0xFFD6DDE3)
+val outlineDarkMediumContrast = Color(0xFFACB3B9)
+val outlineVariantDarkMediumContrast = Color(0xFF8A9197)
+val scrimDarkMediumContrast = Color(0xFF000000)
+val inverseSurfaceDarkMediumContrast = Color(0xFFDFE3E7)
+val inverseOnSurfaceDarkMediumContrast = Color(0xFF262B2E)
+val inversePrimaryDarkMediumContrast = Color(0xFF004E6A)
+val surfaceDimDarkMediumContrast = Color(0xFF0F1417)
+val surfaceBrightDarkMediumContrast = Color(0xFF404549)
+val surfaceContainerLowestDarkMediumContrast = Color(0xFF04080B)
+val surfaceContainerLowDarkMediumContrast = Color(0xFF1A1E21)
+val surfaceContainerDarkMediumContrast = Color(0xFF24282C)
+val surfaceContainerHighDarkMediumContrast = Color(0xFF2E3337)
+val surfaceContainerHighestDarkMediumContrast = Color(0xFF3A3E42)
+
+val primaryDarkHighContrast = Color(0xFFE1F2FF)
+val onPrimaryDarkHighContrast = Color(0xFF000000)
+val primaryContainerDarkHighContrast = Color(0xFF8BCAEF)
+val onPrimaryContainerDarkHighContrast = Color(0xFF000D15)
+val secondaryDarkHighContrast = Color(0xFFE1F2FF)
+val onSecondaryDarkHighContrast = Color(0xFF000000)
+val secondaryContainerDarkHighContrast = Color(0xFFB1C5D3)
+val onSecondaryContainerDarkHighContrast = Color(0xFF000D15)
+val tertiaryDarkHighContrast = Color(0xFFF3EDFF)
+val onTertiaryDarkHighContrast = Color(0xFF000000)
+val tertiaryContainerDarkHighContrast = Color(0xFFC6BDE5)
+val onTertiaryContainerDarkHighContrast = Color(0xFF0C0625)
+val errorDarkHighContrast = Color(0xFFFFECE9)
+val onErrorDarkHighContrast = Color(0xFF000000)
+val errorContainerDarkHighContrast = Color(0xFFFFAEA4)
+val onErrorContainerDarkHighContrast = Color(0xFF220001)
+val backgroundDarkHighContrast = Color(0xFF0F1417)
+val onBackgroundDarkHighContrast = Color(0xFFDFE3E7)
+val surfaceDarkHighContrast = Color(0xFF0F1417)
+val onSurfaceDarkHighContrast = Color(0xFFFFFFFF)
+val surfaceVariantDarkHighContrast = Color(0xFF41484D)
+val onSurfaceVariantDarkHighContrast = Color(0xFFFFFFFF)
+val outlineDarkHighContrast = Color(0xFFEAF1F7)
+val outlineVariantDarkHighContrast = Color(0xFFBCC3C9)
+val scrimDarkHighContrast = Color(0xFF000000)
+val inverseSurfaceDarkHighContrast = Color(0xFFDFE3E7)
+val inverseOnSurfaceDarkHighContrast = Color(0xFF000000)
+val inversePrimaryDarkHighContrast = Color(0xFF004E6A)
+val surfaceDimDarkHighContrast = Color(0xFF0F1417)
+val surfaceBrightDarkHighContrast = Color(0xFF4C5154)
+val surfaceContainerLowestDarkHighContrast = Color(0xFF000000)
+val surfaceContainerLowDarkHighContrast = Color(0xFF1C2023)
+val surfaceContainerDarkHighContrast = Color(0xFF2C3134)
+val surfaceContainerHighDarkHighContrast = Color(0xFF373C3F)
+val surfaceContainerHighestDarkHighContrast = Color(0xFF43474B)
@@ -0,0 +1,278 @@
+package net.keinekekse.app.books.ui.theme
+
+//import android.os.Build
+//import androidx.compose.material3.dynamicDarkColorScheme
+//import androidx.compose.material3.dynamicLightColorScheme
+//import androidx.compose.ui.platform.LocalContext
+import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.darkColorScheme
+import androidx.compose.material3.lightColorScheme
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.Immutable
+import androidx.compose.ui.graphics.Color
+
+private val lightScheme = lightColorScheme(
+    primary = primaryLight,
+    onPrimary = onPrimaryLight,
+    primaryContainer = primaryContainerLight,
+    onPrimaryContainer = onPrimaryContainerLight,
+    secondary = secondaryLight,
+    onSecondary = onSecondaryLight,
+    secondaryContainer = secondaryContainerLight,
+    onSecondaryContainer = onSecondaryContainerLight,
+    tertiary = tertiaryLight,
+    onTertiary = onTertiaryLight,
+    tertiaryContainer = tertiaryContainerLight,
+    onTertiaryContainer = onTertiaryContainerLight,
+    error = errorLight,
+    onError = onErrorLight,
+    errorContainer = errorContainerLight,
+    onErrorContainer = onErrorContainerLight,
+    background = backgroundLight,
+    onBackground = onBackgroundLight,
+    surface = surfaceLight,
+    onSurface = onSurfaceLight,
+    surfaceVariant = surfaceVariantLight,
+    onSurfaceVariant = onSurfaceVariantLight,
+    outline = outlineLight,
+    outlineVariant = outlineVariantLight,
+    scrim = scrimLight,
+    inverseSurface = inverseSurfaceLight,
+    inverseOnSurface = inverseOnSurfaceLight,
+    inversePrimary = inversePrimaryLight,
+    surfaceDim = surfaceDimLight,
+    surfaceBright = surfaceBrightLight,
+    surfaceContainerLowest = surfaceContainerLowestLight,
+    surfaceContainerLow = surfaceContainerLowLight,
+    surfaceContainer = surfaceContainerLight,
+    surfaceContainerHigh = surfaceContainerHighLight,
+    surfaceContainerHighest = surfaceContainerHighestLight,
+)
+
+private val darkScheme = darkColorScheme(
+    primary = primaryDark,
+    onPrimary = onPrimaryDark,
+    primaryContainer = primaryContainerDark,
+    onPrimaryContainer = onPrimaryContainerDark,
+    secondary = secondaryDark,
+    onSecondary = onSecondaryDark,
+    secondaryContainer = secondaryContainerDark,
+    onSecondaryContainer = onSecondaryContainerDark,
+    tertiary = tertiaryDark,
+    onTertiary = onTertiaryDark,
+    tertiaryContainer = tertiaryContainerDark,
+    onTertiaryContainer = onTertiaryContainerDark,
+    error = errorDark,
+    onError = onErrorDark,
+    errorContainer = errorContainerDark,
+    onErrorContainer = onErrorContainerDark,
+    background = backgroundDark,
+    onBackground = onBackgroundDark,
+    surface = surfaceDark,
+    onSurface = onSurfaceDark,
+    surfaceVariant = surfaceVariantDark,
+    onSurfaceVariant = onSurfaceVariantDark,
+    outline = outlineDark,
+    outlineVariant = outlineVariantDark,
+    scrim = scrimDark,
+    inverseSurface = inverseSurfaceDark,
+    inverseOnSurface = inverseOnSurfaceDark,
+    inversePrimary = inversePrimaryDark,
+    surfaceDim = surfaceDimDark,
+    surfaceBright = surfaceBrightDark,
+    surfaceContainerLowest = surfaceContainerLowestDark,
+    surfaceContainerLow = surfaceContainerLowDark,
+    surfaceContainer = surfaceContainerDark,
+    surfaceContainerHigh = surfaceContainerHighDark,
+    surfaceContainerHighest = surfaceContainerHighestDark,
+)
+
+private val mediumContrastLightColorScheme = lightColorScheme(
+    primary = primaryLightMediumContrast,
+    onPrimary = onPrimaryLightMediumContrast,
+    primaryContainer = primaryContainerLightMediumContrast,
+    onPrimaryContainer = onPrimaryContainerLightMediumContrast,
+    secondary = secondaryLightMediumContrast,
+    onSecondary = onSecondaryLightMediumContrast,
+    secondaryContainer = secondaryContainerLightMediumContrast,
+    onSecondaryContainer = onSecondaryContainerLightMediumContrast,
+    tertiary = tertiaryLightMediumContrast,
+    onTertiary = onTertiaryLightMediumContrast,
+    tertiaryContainer = tertiaryContainerLightMediumContrast,
+    onTertiaryContainer = onTertiaryContainerLightMediumContrast,
+    error = errorLightMediumContrast,
+    onError = onErrorLightMediumContrast,
+    errorContainer = errorContainerLightMediumContrast,
+    onErrorContainer = onErrorContainerLightMediumContrast,
+    background = backgroundLightMediumContrast,
+    onBackground = onBackgroundLightMediumContrast,
+    surface = surfaceLightMediumContrast,
+    onSurface = onSurfaceLightMediumContrast,
+    surfaceVariant = surfaceVariantLightMediumContrast,
+    onSurfaceVariant = onSurfaceVariantLightMediumContrast,
+    outline = outlineLightMediumContrast,
+    outlineVariant = outlineVariantLightMediumContrast,
+    scrim = scrimLightMediumContrast,
+    inverseSurface = inverseSurfaceLightMediumContrast,
+    inverseOnSurface = inverseOnSurfaceLightMediumContrast,
+    inversePrimary = inversePrimaryLightMediumContrast,
+    surfaceDim = surfaceDimLightMediumContrast,
+    surfaceBright = surfaceBrightLightMediumContrast,
+    surfaceContainerLowest = surfaceContainerLowestLightMediumContrast,
+    surfaceContainerLow = surfaceContainerLowLightMediumContrast,
+    surfaceContainer = surfaceContainerLightMediumContrast,
+    surfaceContainerHigh = surfaceContainerHighLightMediumContrast,
+    surfaceContainerHighest = surfaceContainerHighestLightMediumContrast,
+)
+
+private val highContrastLightColorScheme = lightColorScheme(
+    primary = primaryLightHighContrast,
+    onPrimary = onPrimaryLightHighContrast,
+    primaryContainer = primaryContainerLightHighContrast,
+    onPrimaryContainer = onPrimaryContainerLightHighContrast,
+    secondary = secondaryLightHighContrast,
+    onSecondary = onSecondaryLightHighContrast,
+    secondaryContainer = secondaryContainerLightHighContrast,
+    onSecondaryContainer = onSecondaryContainerLightHighContrast,
+    tertiary = tertiaryLightHighContrast,
+    onTertiary = onTertiaryLightHighContrast,
+    tertiaryContainer = tertiaryContainerLightHighContrast,
+    onTertiaryContainer = onTertiaryContainerLightHighContrast,
+    error = errorLightHighContrast,
+    onError = onErrorLightHighContrast,
+    errorContainer = errorContainerLightHighContrast,
+    onErrorContainer = onErrorContainerLightHighContrast,
+    background = backgroundLightHighContrast,
+    onBackground = onBackgroundLightHighContrast,
+    surface = surfaceLightHighContrast,
+    onSurface = onSurfaceLightHighContrast,
+    surfaceVariant = surfaceVariantLightHighContrast,
+    onSurfaceVariant = onSurfaceVariantLightHighContrast,
+    outline = outlineLightHighContrast,
+    outlineVariant = outlineVariantLightHighContrast,
+    scrim = scrimLightHighContrast,
+    inverseSurface = inverseSurfaceLightHighContrast,
+    inverseOnSurface = inverseOnSurfaceLightHighContrast,
+    inversePrimary = inversePrimaryLightHighContrast,
+    surfaceDim = surfaceDimLightHighContrast,
+    surfaceBright = surfaceBrightLightHighContrast,
+    surfaceContainerLowest = surfaceContainerLowestLightHighContrast,
+    surfaceContainerLow = surfaceContainerLowLightHighContrast,
+    surfaceContainer = surfaceContainerLightHighContrast,
+    surfaceContainerHigh = surfaceContainerHighLightHighContrast,
+    surfaceContainerHighest = surfaceContainerHighestLightHighContrast,
+)
+
+private val mediumContrastDarkColorScheme = darkColorScheme(
+    primary = primaryDarkMediumContrast,
+    onPrimary = onPrimaryDarkMediumContrast,
+    primaryContainer = primaryContainerDarkMediumContrast,
+    onPrimaryContainer = onPrimaryContainerDarkMediumContrast,
+    secondary = secondaryDarkMediumContrast,
+    onSecondary = onSecondaryDarkMediumContrast,
+    secondaryContainer = secondaryContainerDarkMediumContrast,
+    onSecondaryContainer = onSecondaryContainerDarkMediumContrast,
+    tertiary = tertiaryDarkMediumContrast,
+    onTertiary = onTertiaryDarkMediumContrast,
+    tertiaryContainer = tertiaryContainerDarkMediumContrast,
+    onTertiaryContainer = onTertiaryContainerDarkMediumContrast,
+    error = errorDarkMediumContrast,
+    onError = onErrorDarkMediumContrast,
+    errorContainer = errorContainerDarkMediumContrast,
+    onErrorContainer = onErrorContainerDarkMediumContrast,
+    background = backgroundDarkMediumContrast,
+    onBackground = onBackgroundDarkMediumContrast,
+    surface = surfaceDarkMediumContrast,
+    onSurface = onSurfaceDarkMediumContrast,
+    surfaceVariant = surfaceVariantDarkMediumContrast,
+    onSurfaceVariant = onSurfaceVariantDarkMediumContrast,
+    outline = outlineDarkMediumContrast,
+    outlineVariant = outlineVariantDarkMediumContrast,
+    scrim = scrimDarkMediumContrast,
+    inverseSurface = inverseSurfaceDarkMediumContrast,
+    inverseOnSurface = inverseOnSurfaceDarkMediumContrast,
+    inversePrimary = inversePrimaryDarkMediumContrast,
+    surfaceDim = surfaceDimDarkMediumContrast,
+    surfaceBright = surfaceBrightDarkMediumContrast,
+    surfaceContainerLowest = surfaceContainerLowestDarkMediumContrast,
+    surfaceContainerLow = surfaceContainerLowDarkMediumContrast,
+    surfaceContainer = surfaceContainerDarkMediumContrast,
+    surfaceContainerHigh = surfaceContainerHighDarkMediumContrast,
+    surfaceContainerHighest = surfaceContainerHighestDarkMediumContrast,
+)
+
+private val highContrastDarkColorScheme = darkColorScheme(
+    primary = primaryDarkHighContrast,
+    onPrimary = onPrimaryDarkHighContrast,
+    primaryContainer = primaryContainerDarkHighContrast,
+    onPrimaryContainer = onPrimaryContainerDarkHighContrast,
+    secondary = secondaryDarkHighContrast,
+    onSecondary = onSecondaryDarkHighContrast,
+    secondaryContainer = secondaryContainerDarkHighContrast,
+    onSecondaryContainer = onSecondaryContainerDarkHighContrast,
+    tertiary = tertiaryDarkHighContrast,
+    onTertiary = onTertiaryDarkHighContrast,
+    tertiaryContainer = tertiaryContainerDarkHighContrast,
+    onTertiaryContainer = onTertiaryContainerDarkHighContrast,
+    error = errorDarkHighContrast,
+    onError = onErrorDarkHighContrast,
+    errorContainer = errorContainerDarkHighContrast,
+    onErrorContainer = onErrorContainerDarkHighContrast,
+    background = backgroundDarkHighContrast,
+    onBackground = onBackgroundDarkHighContrast,
+    surface = surfaceDarkHighContrast,
+    onSurface = onSurfaceDarkHighContrast,
+    surfaceVariant = surfaceVariantDarkHighContrast,
+    onSurfaceVariant = onSurfaceVariantDarkHighContrast,
+    outline = outlineDarkHighContrast,
+    outlineVariant = outlineVariantDarkHighContrast,
+    scrim = scrimDarkHighContrast,
+    inverseSurface = inverseSurfaceDarkHighContrast,
+    inverseOnSurface = inverseOnSurfaceDarkHighContrast,
+    inversePrimary = inversePrimaryDarkHighContrast,
+    surfaceDim = surfaceDimDarkHighContrast,
+    surfaceBright = surfaceBrightDarkHighContrast,
+    surfaceContainerLowest = surfaceContainerLowestDarkHighContrast,
+    surfaceContainerLow = surfaceContainerLowDarkHighContrast,
+    surfaceContainer = surfaceContainerDarkHighContrast,
+    surfaceContainerHigh = surfaceContainerHighDarkHighContrast,
+    surfaceContainerHighest = surfaceContainerHighestDarkHighContrast,
+)
+
+@Immutable
+data class ColorFamily(
+    val color: Color,
+    val onColor: Color,
+    val colorContainer: Color,
+    val onColorContainer: Color,
+)
+
+val unspecified_scheme = ColorFamily(
+    Color.Unspecified, Color.Unspecified, Color.Unspecified, Color.Unspecified
+)
+
+@Composable
+fun AppTheme(
+    darkTheme: Boolean = isSystemInDarkTheme(),
+    // Dynamic color is available on Android 12+
+    dynamicColor: Boolean = true,
+    content: @Composable() () -> Unit,
+) {
+    val colorScheme = when {
+        // *hb* das gibt Probleme außerhalb von Android
+//        dynamicColor && Build.VERSION.SDK_INT >= Build.VERSION_CODES.S -> {
+//            val context = LocalContext.current
+//            if (darkTheme) dynamicDarkColorScheme(context) else dynamicLightColorScheme(context)
+//        }
+
+        darkTheme -> darkScheme
+        else -> lightScheme
+    }
+
+    MaterialTheme(
+        colorScheme = colorScheme,
+        typography = AppTypography,
+        content = content
+    )
+}
@@ -0,0 +1,5 @@
+package net.keinekekse.app.books.ui.theme
+
+import androidx.compose.material3.Typography
+
+val AppTypography = Typography()
@@ -0,0 +1,507 @@
+package net.keinekekse.app.auth
+
+import io.ktor.client.*
+import io.ktor.client.call.*
+import io.ktor.client.plugins.*
+import io.ktor.client.plugins.auth.providers.*
+import io.ktor.client.plugins.contentnegotiation.*
+import io.ktor.client.request.*
+import io.ktor.client.request.forms.*
+import io.ktor.client.statement.*
+import io.ktor.http.*
+import io.ktor.network.tls.extensions.HashAlgorithm
+import io.ktor.serialization.kotlinx.json.*
+import io.ktor.server.cio.*
+import io.ktor.server.engine.*
+import io.ktor.server.response.*
+import io.ktor.server.routing.*
+import io.ktor.util.Digest
+import io.ktor.util.sha1
+import io.ktor.utils.io.charsets.Charsets
+import io.ktor.utils.io.core.Closeable
+import io.ktor.utils.io.core.toByteArray
+import kotlinx.coroutines.CompletableDeferred
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.withTimeout
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+import java.awt.Desktop
+import java.net.Socket
+import kotlin.io.encoding.Base64
+import kotlin.random.Random
+import kotlin.time.Duration.Companion.minutes
+import kotlin.use
+
+class Authenticator2(
+    keycloakServerHostname: String,
+    keycloakRealm: String,
+    keycloakClient: String,
+) : Closeable {
+    private val httpClient = HttpClient {
+        install(ContentNegotiation) { json() }
+        install(HttpTimeout) {
+            requestTimeoutMillis = 10000
+            connectTimeoutMillis = 5000
+        }
+    }
+
+    private val keyc =
+        KeycloakConfig(keycloakServerHostname, keycloakRealm, keycloakClient)
+
+    override fun close() = httpClient.close()
+
+    suspend fun authenticate(): AuthResult {
+        val config = AuthRun(keyc)
+
+        if (!testServerConnection(config)) {
+            return AuthResult.Error("ERR001", "Der Anmeldeserver ist nicht erreichbar.", "")
+        }
+//        var server: EmbeddedServer<NettyApplicationEngine, NettyApplicationEngine.Configuration>? = null
+        var server: EmbeddedServer<CIOApplicationEngine, CIOApplicationEngine.Configuration>? = null
+        try {
+            server = createCallbackServer(config).start(wait = false)
+            val port = server.engine.resolvedConnectors().first().port
+            config.buildRedirectUri(port)
+            if (!waitForServer(port)) {
+                return AuthResult.Fatal(
+                    "ERR008",
+                    "Schwerer Fehler",
+                    "Der interne Webserver konnte nicht gestartet werden. Keine Anmeldung möglich."
+                )
+            }
+
+            openAuthorizationInBrowser(config)
+
+            return withTimeout(5.minutes) {
+                val resolvedTokens = config.resultDeferred.await()
+                resolvedTokens
+            }
+        } catch (e: Exception) {
+            return AuthResult.Error(
+                "ERR002",
+                "Bei der Anmeldung ist ein Fehler aufgetreten",
+                e.message ?: "Unbekannter Fehler"
+            )
+        } finally {
+            server?.stop(1000, 2000)
+        }
+    }
+
+    suspend fun requestRefreshToken(tokens: BearerTokens): AuthResult {
+        val config = AuthRun(keyc)
+
+        val response = httpClient.submitForm(
+            url = buildUrl {
+                protocol = URLProtocol.HTTPS
+                host = config.kc.keycloakServerHostname
+                encodedPath = config.kc.tokenEndpoint
+            }.toString(),
+            formParameters = parameters {
+                append("grant_type", "refresh_token")
+                append("client_id", config.kc.keycloakClient)
+                append("refresh_token", tokens.refreshToken ?: "")
+            }
+        )
+//        {
+//            headers { append("Authorization", "Bearer ${tokens.accessToken}") }
+//        }
+
+        return validateRequestTokenResponse(response)
+    }
+
+    private fun isPortOpen(port: Int): Boolean =
+        try {
+            // TODO Socket ist nicht portabel (JVM only)
+            Socket(KeycloakConfig.LOCALHOST, port).use { true }
+        } catch (e: Exception) {
+            // Port is closed or unreachable
+            false
+        }
+
+    private suspend fun waitForServer(port: Int, timeoutSeconds: Int = 3): Boolean {
+        repeat(timeoutSeconds * 10) {
+            if (isPortOpen(port)) return true
+            delay(100)
+        }
+        return false
+    }
+
+    private fun openAuthorizationInBrowser(config: AuthRun) {
+        val authorizationUrl = buildAuthorizationUrl(config)
+
+        // TODO momentan nur für JVM, Rest ist noch zu eruieren
+        if (!Desktop.isDesktopSupported()) {
+            throw IllegalStateException("Desktop API not supported (cannot open browser automatically).")
+        }
+        val desktop = Desktop.getDesktop()
+        if (!desktop.isSupported(Desktop.Action.BROWSE)) {
+            throw IllegalStateException("BROWSE action not supported (cannot open browser automatically).")
+        }
+
+        desktop.browse(authorizationUrl.toURI())
+    }
+
+    private fun buildAuthorizationUrl(config: AuthRun): Url = buildUrl {
+        protocol = URLProtocol.HTTPS
+        host = config.kc.keycloakServerHostname
+        encodedPath = config.kc.authorizationEndpoint
+        parameters.append("response_type", "code")
+        parameters.append("client_id", config.kc.keycloakClient)
+        parameters.append("redirect_uri", config.redirectUri)
+        parameters.append("scope", KeycloakConfig.SCOPE)
+        parameters.append("state", config.csrfProtectionState)
+        parameters.append("code_challenge", config.codeChallenge)
+        parameters.append("code_challenge_method", KeycloakConfig.PKCE_METHOD)
+    }
+
+    private fun createCallbackServer(config: AuthRun) =
+        embeddedServer(CIO, port = 0, host = KeycloakConfig.LOCALHOST) {
+            routing {
+                get(KeycloakConfig.CALLBACK_PATH) {
+//                    val serverPort = engine.resolvedConnectors().first().port
+                    val code = call.request.queryParameters["code"]
+
+                    var authResult =
+                        validateAuthorizationRequest(call.request, config.csrfProtectionState)
+                    when (authResult) {
+                        is AuthResult.Success -> {
+                            if (code == null) {
+                                authResult = AuthResult.Fatal(
+                                    "ERR003",
+                                    "Schwerer Fehler",
+                                    "Der Anmeldeserver lieferte ungültige Daten. Mögliche Ursachen: Netzwerkfehler, Serverfehler oder Malware."
+                                )
+                            } else {
+                                authResult = requestTokens(config, code)
+                            }
+                        }
+
+                        else -> {}
+                    }
+
+                    var text = ""
+                    var status = HttpStatusCode.BadRequest
+                    when (authResult) {
+                        is AuthResult.Success -> {
+                            text =
+                                "<html><body><h1>Login erfolgreich! Du kannst das Fenster schließen.</h1></body></html>"
+                            status = HttpStatusCode.OK
+                        }
+
+                        is AuthResult.Error -> {
+                            text = "<html><body><h1>Fehler bei der Anmeldung.</h1><h2>${
+                                htmlEscape(authResult.message)
+                            }</h2><h3>${htmlEscape(authResult.details ?: "")}</h3></body></html>"
+                            status = HttpStatusCode.BadRequest
+                        }
+
+                        is AuthResult.Fatal -> {
+                            text =
+                                "<html><body><h1>Schwerer Fehler.</h1><h2>${htmlEscape(authResult.message)}</h2><h3>${
+                                    htmlEscape(authResult.details ?: "")
+                                }</h3></body></html>"
+                            status = HttpStatusCode.InternalServerError
+                        }
+                    }
+                    call.respondText(text, contentType = ContentType.Text.Html, status = status)
+
+                    if (!config.resultDeferred.isCompleted)
+                        config.resultDeferred.complete(authResult)
+                }
+            }
+
+        }
+
+    private fun htmlEscape(value: String): String =
+        value.replace("&", "&amp;")
+            .replace("<", "&lt;")
+            .replace(">", "&gt;")
+            .replace("\"", "&quot;")
+            .replace("'", "&#39;")
+
+    private fun validateAuthorizationRequest(
+        request: RoutingRequest,
+        csrfProtectionState: String,
+    ): AuthResult {
+        /*
+        - state != csrfProt -> Fehler: Kommunikation mit dem Anmeldeserver hat nicht geklappt,
+                                       könnte auf Malware hindeuten, Abbruch
+          throw Fatal error authenticating user -> exit app
+        - wenn error =! null -> error + error_description anzeigen
+          rc NULL == keine auth -> app muss entscheiden
+        - code == null -> Fehler: Server liefert ungültige Daten,
+                                  könnte auf Probleme bei der Netzwerkverbindung oder beim Anmeldeserver hindeuten
+          rc NULL -> app
+         */
+        if (request.queryParameters["error"] != null) {
+            return AuthResult.Error(
+                "ERR004",
+                "Fehler bei der Anmeldung",
+                "${request.queryParameters["error"]}: ${request.queryParameters["error_description"] ?: ""}"
+            )
+        }
+        if (request.queryParameters["state"] != csrfProtectionState) {
+            return AuthResult.Fatal(
+                "ERR005",
+                "Schwerer Fehler",
+                "CSRF-Fehler in der Kommunikation mit dem Anmeldeserver. Mögliche Ursachen: Netzwerkfehler, Serverfehler oder Malware."
+            )
+        }
+        return AuthResult.Success(BearerTokens("", ""))  // hier ist nur Success wichtig
+    }
+
+    /* Antwort von Keycloak:
+    {
+    "access_token": "eyJhbG ...
+    "expires_in": 300,
+    "refresh_expires_in": 0,
+    "refresh_token": "eyJhb ...
+    "token_type": "Bearer",
+    "id_token": "eyJ ...
+    "not-before-policy": 1769817270,
+    "session_state": "YhlNjIuW-lk1aQwwD9xm4edJ",
+    "scope": "openid profile email"
+    }
+    */
+
+    @Serializable
+    data class TokenResponse(
+        @SerialName("access_token") val accessToken: String,
+        @SerialName("expires_in") val expiresIn: Int,
+        @SerialName("refresh_expires_in") val refreshExpiresIn: Int,
+        @SerialName("refresh_token") val refreshToken: String,
+        @SerialName("token_type") val tokenType: String,
+        @SerialName("id_token") val idToken: String?,
+        @SerialName("not-before-policy") val notBeforePolicy: Int?,
+        @SerialName("session_state") val sessionState: String?,
+        val scope: String,
+    )
+
+    @Serializable
+    data class TokenErrorResponse(
+        @SerialName("error") val error: String,
+        @SerialName("error_description") val errorDescription: String?,
+        @SerialName("session_state") val sessionState: String?,
+    )
+
+    private suspend fun requestTokens(config: AuthRun, authCode: String): AuthResult {
+        val response: HttpResponse = httpClient.submitForm(
+            url = buildUrl {
+                protocol = URLProtocol.HTTPS
+                host = config.kc.keycloakServerHostname
+                encodedPath = config.kc.tokenEndpoint
+            }.toString(),
+            formParameters = parameters {
+                append("grant_type", "authorization_code")
+                append("client_id", config.kc.keycloakClient)
+                append("code", authCode)
+                append("redirect_uri", config.redirectUri)
+                append("code_verifier", config.codeVerifier)
+            }
+        )
+        return validateRequestTokenResponse(response)
+    }
+
+    suspend fun validateRequestTokenResponse(response: HttpResponse): AuthResult {
+        if (response.status != HttpStatusCode.OK) {
+            try {
+                val errorResponse = response.body<TokenErrorResponse>()
+                return AuthResult.Error(
+                    "ERR006",
+                    "HTTP-Fehler ${response.status.value} beim Abholen der Zugriffstoken",
+                    "${errorResponse.error}: ${errorResponse.errorDescription ?: ""}"
+                )
+            } catch (e: Exception) {
+                // Fehler beim JSON-Konvertieren
+                val errorResponse = response.bodyAsText()
+                return AuthResult.Error(
+                    "ERR006",
+                    "HTTP-Fehler ${response.status.value} beim Abholen der Zugriffstoken",
+                    errorResponse
+                )
+            }
+        }
+        val tokenResponse: TokenResponse = try {
+            response.body<TokenResponse>()
+        } catch (e: Exception) {
+            // Fehler beim JSON-Konvertieren
+            return AuthResult.Fatal(
+                "ERR007",
+                "Schwerer Fehler",
+                "Ungültige Daten beim Abholen der Zugriffstoken. Mögliche Ursachen: Netzwerkfehler, Serverfehler oder Malware."
+            )
+        }
+
+        return AuthResult.Success(
+            BearerTokens(
+                tokenResponse.accessToken,
+                tokenResponse.refreshToken
+            )
+        )
+    }
+
+//    suspend fun requestUserInfo(
+//        accessToken: String,
+//    ) {
+//        val config = AuthenticationConfig(keycloakServerHostname, keycloakRealm, keycloakClient)
+//
+//        val response = httpClient.get(
+//            url = buildUrl {
+//                protocol = URLProtocol.HTTPS
+//                host = config.keycloakServerHostname
+//                path(config.userinfoEndpoint)
+//            },
+////            formParameters = parameters {
+////                append("grant_type", "refresh_token")
+////                append("client_id", config.keycloakClient)
+////                append("refresh_token", refreshToken)
+////            }
+//        ) {
+//            headers { append("Authorization", "Bearer $accessToken") }
+//        }
+//
+//        println("Status: ${response.status}")
+//        println("Body: ${response.bodyAsText()}")
+//
+//    }
+
+    private suspend fun testServerConnection(config: AuthRun): Boolean {
+        val response: HttpResponse = httpClient.request(
+            url = buildUrl {
+                protocol = URLProtocol.HTTPS
+                host = config.kc.keycloakServerHostname
+                encodedPath = config.kc.certificatesEndpoint
+            }
+        )
+        return response.status.value < 400
+    }
+
+    /*
+    access token:
+
+{
+  "exp": 1769839803,
+  "iat": 1769839503,
+  "auth_time": 1769839502,
+  "jti": "onrtac:f0ea9436-470d-7d1d-fd9d-b43d2f075c46",
+  "iss": "https://kec.keinekekse.net/realms/app-server-realm",
+  "aud": "account",
+  "sub": "b5b40fa3-468f-443c-8eb0-e220bdd353bc",
+  "typ": "Bearer",
+  "azp": "pkce-book-app",
+  "sid": "n_TeXWIUSV66OkYwoc0D1og9",
+  "acr": "1",
+  "allowed-origins": [
+    "http://127.0.0.1",
+    "https://kas.keinekekse.net"
+  ],
+  "realm_access": {
+    "roles": [
+      "offline_access",
+      "default-roles-app-server-realm",
+      "uma_authorization",
+      "book-admin"
+    ]
+  },
+  "resource_access": {
+    "account": {
+      "roles": [
+        "manage-account",
+        "manage-account-links",
+        "view-profile"
+      ]
+    }
+  },
+  "scope": "openid profile email",
+  "email_verified": true,
+  "name": "Hartmut Bauer",
+  "preferred_username": "hb42",
+  "given_name": "Hartmut",
+  "family_name": "Bauer",
+  "email": "hb242@pm.me"
+}
+
+-> realm_access:
+
+            implementation(libs.ktor.serverAuthJwt)
+
+        val decod = JWT().decodeJwt(tokenResponse.accessToken!!)
+        // claims, die nur String enthalten: getClaim("claim-name")
+        // für andere: "{" -> asMap<String, Any> => cast!
+        //             "[" -> asList(Class<T>)
+        val roles: List<String> = decod.getClaim("realm_access").asMap()["roles"] as List<String>
+        roles.forEach { println(it) }
+
+
+  refreshTokens {
+    val refreshTokenInfo: TokenInfo = client.submitForm(
+        url = "https://accounts.google.com/o/oauth2/token",
+        formParameters = parameters {
+            append("grant_type", "refresh_token")
+            append("client_id", System.getenv("GOOGLE_CLIENT_ID"))
+            append("refresh_token", oldTokens?.refreshToken ?: "")
+        }
+    ) { markAsRefreshTokenRequest() }.body()
+    bearerTokenStorage.add(BearerTokens(refreshTokenInfo.accessToken, oldTokens?.refreshToken!!))
+    bearerTokenStorage.last()
+}
+     */
+}
+
+sealed interface AuthResult {
+    data class Success(val tokens: BearerTokens) : AuthResult
+    data class Error(val code: String, val message: String, val details: String? = null) :
+            AuthResult
+
+    data class Fatal(val code: String, val message: String, val details: String? = null) :
+            AuthResult
+}
+
+internal class KeycloakConfig(
+    val keycloakServerHostname: String,
+    keycloakRealm: String,
+    val keycloakClient: String,
+) {
+    companion object {
+        const val LOCALHOST = "127.0.0.1"
+        const val CALLBACK_PATH = "/callback"
+        const val SCOPE = "openid"
+        const val PKCE_METHOD = "S256"
+
+        fun generateRandomString(): String {
+            val bytes = ByteArray(64)
+            SecureRandom().nextBytes(bytes)
+            return Base64.getUrlEncoder().withoutPadding().encodeToString(bytes)
+        }
+
+        fun generateCodeChallenge(codeVerifier: String): String {
+            val bytes = codeVerifier.toByteArray(kotlin.text.Charsets.US_ASCII)
+            val digest = MessageDigest.getInstance("SHA-256").digest(bytes)
+            return Base64.getUrlEncoder().withoutPadding().encodeToString(diges
+        }
+    }
+
+    private val keycloakBaseUrl = "/realms/$keycloakRealm/protocol/openid-connect"
+
+    val authorizationEndpoint = "$keycloakBaseUrl/auth"
+    val tokenEndpoint = "$keycloakBaseUrl/token"
+    val certificatesEndpoint = "$keycloakBaseUrl/certs"
+    val userinfoEndpoint = "$keycloakBaseUrl/userinfo"
+
+}
+
+internal class AuthRun(val kc: KeycloakConfig) {
+    val codeVerifier = KeycloakConfig.generateRandomString()
+    val codeChallenge = KeycloakConfig.generateCodeChallenge(codeVerifier)
+    val csrfProtectionState = KeycloakConfig.generateRandomString()
+
+    val resultDeferred = CompletableDeferred<AuthResult>()
+    private var redirectUri_: String? = null
+    val redirectUri: String
+        get() = redirectUri_
+            ?: throw IllegalStateException("redirectUri not set, can only be when embedded server is running")
+
+    fun buildRedirectUri(port: Int) {
+        redirectUri_ = "http://${KeycloakConfig.LOCALHOST}:$port${KeycloakConfig.CALLBACK_PATH}"
+    }
+}
@@ -0,0 +1,80 @@
+package net.keinekekse.app.auth
+
+import kotlinx.coroutines.CompletableDeferred
+import org.koin.core.annotation.Single
+import java.security.MessageDigest
+import java.security.SecureRandom
+import java.util.*
+
+sealed interface AuthResult {
+    class Success : AuthResult
+
+    //    data class Success(val tokens: BearerTokens) : AuthResult
+    data class Error(val code: String, val message: String, val details: String? = null) :
+            AuthResult
+
+    data class Fatal(val code: String, val message: String, val details: String? = null) :
+            AuthResult
+}
+
+@Single
+fun createKeycloakConfig(): KeycloakConfig {
+
+    // TODO muss aus config geholt werden (<--> DI??)
+
+    val keycloakServerHostname = "kec.keinekekse.net"
+    val keycloakRealm = "app-server-realm"
+    val keycloakClient = "pkce-book-app"
+
+    return KeycloakConfig(keycloakServerHostname, keycloakRealm, keycloakClient)
+}
+
+class KeycloakConfig(
+    val keycloakServerHostname: String,
+    keycloakRealm: String,
+    val keycloakClient: String,
+) {
+    companion object {
+        const val LOCALHOST = "127.0.0.1"
+        const val CALLBACK_PATH = "/callback"
+        const val SCOPE = "openid"
+        const val PKCE_METHOD = "S256"
+
+        // TODO die Hash-Berechnung ist nicht portabel, die beiden fn müssen je Platform implementiert werden
+        fun generateRandomString(): String {
+            val bytes = ByteArray(64)
+            SecureRandom().nextBytes(bytes)
+            return Base64.getUrlEncoder().withoutPadding().encodeToString(bytes)
+        }
+
+        fun generateCodeChallenge(codeVerifier: String): String {
+            val bytes = codeVerifier.toByteArray(Charsets.US_ASCII)
+            val digest = MessageDigest.getInstance("SHA-256").digest(bytes)
+            return Base64.getUrlEncoder().withoutPadding().encodeToString(digest)
+        }
+    }
+
+    private val keycloakBaseUrl = "/realms/$keycloakRealm/protocol/openid-connect"
+
+    val authorizationEndpoint = "$keycloakBaseUrl/auth"
+    val tokenEndpoint = "$keycloakBaseUrl/token"
+    val certificatesEndpoint = "$keycloakBaseUrl/certs"
+    val userinfoEndpoint = "$keycloakBaseUrl/userinfo"
+
+}
+
+internal class AuthRun(val kc: KeycloakConfig) {
+    val codeVerifier = KeycloakConfig.generateRandomString()
+    val codeChallenge = KeycloakConfig.generateCodeChallenge(codeVerifier)
+    val csrfProtectionState = KeycloakConfig.generateRandomString()
+
+    val resultDeferred = CompletableDeferred<AuthResult>()
+    private var redirectUri_: String? = null
+    val redirectUri: String
+        get() = redirectUri_
+            ?: throw IllegalStateException("redirectUri not set, can only be when embedded server is running")
+
+    fun buildRedirectUri(port: Int) {
+        redirectUri_ = "http://${KeycloakConfig.LOCALHOST}:$port${KeycloakConfig.CALLBACK_PATH}"
+    }
+}
@@ -0,0 +1,453 @@
+package net.keinekekse.app.auth
+
+import io.ktor.client.*
+import io.ktor.client.call.*
+import io.ktor.client.plugins.*
+import io.ktor.client.plugins.auth.providers.*
+import io.ktor.client.plugins.contentnegotiation.*
+import io.ktor.client.request.*
+import io.ktor.client.request.forms.*
+import io.ktor.client.statement.*
+import io.ktor.http.*
+import io.ktor.serialization.kotlinx.json.*
+import io.ktor.server.cio.*
+import io.ktor.server.engine.*
+import io.ktor.server.response.*
+import io.ktor.server.routing.*
+import io.ktor.utils.io.core.Closeable
+import kotlinx.coroutines.delay
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+import net.keinekekse.app.service.TokenService
+import org.koin.core.annotation.Single
+import java.awt.Desktop
+import java.net.Socket
+import kotlin.use
+
+@Single
+class Authenticator(
+//    @Property("kc_server") keycloakServerHostname: String,
+//    @Property("kc_realm") keycloakRealm: String,
+//    @Property("kc_client") keycloakClient: String,
+    val tokenService: TokenService,
+    private val keycloakConfig: KeycloakConfig,
+) : Closeable {
+    private val httpClient = HttpClient {
+        install(ContentNegotiation) { json() }
+        install(HttpTimeout) {
+            requestTimeoutMillis = 10000
+            connectTimeoutMillis = 5000
+        }
+    }
+
+//    private val keycloakConfig =
+//        KeycloakConfig(keycloakServerHostname, keycloakRealm, keycloakClient)
+
+    override fun close() = httpClient.close()
+
+    suspend fun authenticate(): AuthResult {
+        val config = AuthRun(keycloakConfig)
+
+        if (!testServerConnection(config)) {
+            return AuthResult.Error("ERR001", "Der Anmeldeserver ist nicht erreichbar.", "")
+        }
+        var server: EmbeddedServer<CIOApplicationEngine, CIOApplicationEngine.Configuration>? = null
+        try {
+            server = createCallbackServer(config).start(wait = false)
+            val port = server.engine.resolvedConnectors().first().port
+            config.buildRedirectUri(port)
+            if (!waitForServer(port)) {
+                return AuthResult.Fatal(
+                    "ERR008",
+                    "Schwerer Fehler",
+                    "Der interne Webserver konnte nicht gestartet werden. Keine Anmeldung möglich."
+                )
+            }
+
+            openAuthorizationInBrowser(config)
+
+            return config.resultDeferred.await()
+
+        } catch (e: Exception) {
+            return AuthResult.Error(
+                "ERR002",
+                "Bei der Anmeldung ist ein Fehler aufgetreten",
+                e.message ?: "Unbekannter Fehler"
+            )
+        } finally {
+            server?.stop(1000, 2000)
+        }
+    }
+
+    suspend fun requestRefreshToken(tokens: BearerTokens?): BearerTokens? {
+        val config = AuthRun(keycloakConfig)
+
+        val response = httpClient.submitForm(
+            url = buildUrl {
+                protocol = URLProtocol.HTTPS
+                host = config.kc.keycloakServerHostname
+                encodedPath = config.kc.tokenEndpoint
+            }.toString(),
+            formParameters = parameters {
+                append("grant_type", "refresh_token")
+                append("client_id", config.kc.keycloakClient)
+                append("refresh_token", tokens?.refreshToken ?: "")
+            }
+        )
+        val result = validateRequestTokenResponse(response)
+        when (result.first) {
+            is AuthResult.Success -> {
+                tokenService.setTokens(result.second)
+                return result.second
+            }
+
+            else -> {
+                tokenService.setTokens(null)
+                return null
+            }
+        }
+    }
+
+    private fun isPortOpen(port: Int): Boolean =
+        try {
+            // TODO Socket ist nicht portabel (JVM only)
+            Socket(KeycloakConfig.LOCALHOST, port).use { true }
+        } catch (e: Exception) {
+            // Port is closed or unreachable
+            println("${e.javaClass.simpleName}: ${e.message}")
+            false
+        }
+
+    private suspend fun waitForServer(port: Int, timeoutSeconds: Int = 3): Boolean {
+        repeat(timeoutSeconds * 10) {
+            if (isPortOpen(port)) return true
+            delay(100)
+        }
+        return false
+    }
+
+    private fun openAuthorizationInBrowser(config: AuthRun) {
+        val authorizationUrl = buildAuthorizationUrl(config)
+
+        // TODO momentan nur für JVM, Rest ist noch zu eruieren
+        if (!Desktop.isDesktopSupported()) {
+            throw IllegalStateException("Desktop API not supported (cannot open browser automatically).")
+        }
+        val desktop = Desktop.getDesktop()
+        if (!desktop.isSupported(Desktop.Action.BROWSE)) {
+            throw IllegalStateException("BROWSE action not supported (cannot open browser automatically).")
+        }
+
+        desktop.browse(authorizationUrl.toURI())
+    }
+
+    private fun buildAuthorizationUrl(config: AuthRun): Url = buildUrl {
+        protocol = URLProtocol.HTTPS
+        host = config.kc.keycloakServerHostname
+        encodedPath = config.kc.authorizationEndpoint
+        parameters.append("response_type", "code")
+        parameters.append("client_id", config.kc.keycloakClient)
+        parameters.append("redirect_uri", config.redirectUri)
+        parameters.append("scope", KeycloakConfig.SCOPE)
+        parameters.append("state", config.csrfProtectionState)
+        parameters.append("code_challenge", config.codeChallenge)
+        parameters.append("code_challenge_method", KeycloakConfig.PKCE_METHOD)
+    }
+
+    private fun createCallbackServer(config: AuthRun) =
+        embeddedServer(CIO, port = 0, host = KeycloakConfig.LOCALHOST) {
+            routing {
+                get(KeycloakConfig.CALLBACK_PATH) {
+                    val code = call.request.queryParameters["code"]
+
+                    var authResult =
+                        validateAuthorizationRequest(call.request, config.csrfProtectionState)
+
+                    if (authResult is AuthResult.Success) {
+                        authResult = requestTokens(config, code)
+                    }
+
+                    val (text, status) = createGoodByeMessage(authResult)
+                    call.respondText(text, contentType = ContentType.Text.Html, status = status)
+
+                    if (!config.resultDeferred.isCompleted)
+                        config.resultDeferred.complete(authResult)
+                }
+            }
+        }
+
+    private fun htmlEscape(value: String): String =
+        value.replace("&", "&amp;")
+            .replace("<", "&lt;")
+            .replace(">", "&gt;")
+            .replace("\"", "&quot;")
+            .replace("'", "&#39;")
+
+    private fun createGoodByeMessage(authResult: AuthResult): Pair<String, HttpStatusCode> {
+        var text = ""
+        var status = HttpStatusCode.BadRequest
+        when (authResult) {
+            is AuthResult.Success -> {
+                text =
+                    "<html><body><h1>Login erfolgreich! Du kannst das Fenster schließen.</h1></body></html>"
+                status = HttpStatusCode.OK
+            }
+
+            is AuthResult.Error -> {
+                text = "<html><body><h1>Fehler bei der Anmeldung.</h1><h2>${
+                    htmlEscape(authResult.message)
+                }</h2><h3>${htmlEscape(authResult.details ?: "")}</h3></body></html>"
+                status = HttpStatusCode.BadRequest
+            }
+
+            is AuthResult.Fatal -> {
+                text =
+                    "<html><body><h1>Schwerer Fehler.</h1><h2>${htmlEscape(authResult.message)}</h2><h3>${
+                        htmlEscape(authResult.details ?: "")
+                    }</h3></body></html>"
+                status = HttpStatusCode.InternalServerError
+            }
+        }
+        return Pair(text, status)
+    }
+
+    private fun validateAuthorizationRequest(
+        request: RoutingRequest,
+        csrfProtectionState: String,
+    ): AuthResult {
+        /*
+        - state != csrfProt -> Fehler: Kommunikation mit dem Anmeldeserver hat nicht geklappt,
+                                       könnte auf Malware hindeuten, Abbruch
+          throw Fatal error authenticating user -> exit app
+        - wenn error =! null -> error + error_description anzeigen
+          rc NULL == keine auth -> app muss entscheiden
+        - code == null -> Fehler: Server liefert ungültige Daten,
+                                  könnte auf Probleme bei der Netzwerkverbindung oder beim Anmeldeserver hindeuten
+          rc NULL -> app
+         */
+        if (request.queryParameters["error"] != null) {
+            return AuthResult.Error(
+                "ERR004",
+                "Fehler bei der Anmeldung",
+                "${request.queryParameters["error"]}: ${request.queryParameters["error_description"] ?: ""}"
+            )
+        }
+        if (request.queryParameters["state"] != csrfProtectionState) {
+            return AuthResult.Fatal(
+                "ERR005",
+                "Schwerer Fehler",
+                "CSRF-Fehler in der Kommunikation mit dem Anmeldeserver. Mögliche Ursachen: Netzwerkfehler, Serverfehler oder Malware."
+            )
+        }
+        return AuthResult.Success()
+    }
+
+    /* Antwort von Keycloak:
+    {
+    "access_token": "eyJhbG ...
+    "expires_in": 300,
+    "refresh_expires_in": 0,
+    "refresh_token": "eyJhb ...
+    "token_type": "Bearer",
+    "id_token": "eyJ ...
+    "not-before-policy": 1769817270,
+    "session_state": "YhlNjIuW-lk1aQwwD9xm4edJ",
+    "scope": "openid profile email"
+    }
+    */
+
+    @Serializable
+    data class TokenResponse(
+        @SerialName("access_token") val accessToken: String,
+        @SerialName("expires_in") val expiresIn: Int,
+        @SerialName("refresh_expires_in") val refreshExpiresIn: Int,
+        @SerialName("refresh_token") val refreshToken: String,
+        @SerialName("token_type") val tokenType: String,
+        @SerialName("id_token") val idToken: String?,
+        @SerialName("not-before-policy") val notBeforePolicy: Int?,
+        @SerialName("session_state") val sessionState: String?,
+        val scope: String,
+    )
+
+    @Serializable
+    data class TokenErrorResponse(
+        @SerialName("error") val error: String,
+        @SerialName("error_description") val errorDescription: String?,
+        @SerialName("session_state") val sessionState: String?,
+    )
+
+    private suspend fun requestTokens(config: AuthRun, authCode: String?): AuthResult {
+        if (authCode == null) {
+            return AuthResult.Fatal(
+                "ERR003",
+                "Schwerer Fehler",
+                "Der Anmeldeserver lieferte ungültige Daten. Mögliche Ursachen: Netzwerkfehler, Serverfehler oder Malware."
+            )
+        }
+        val response: HttpResponse = httpClient.submitForm(
+            url = buildUrl {
+                protocol = URLProtocol.HTTPS
+                host = config.kc.keycloakServerHostname
+                encodedPath = config.kc.tokenEndpoint
+            }.toString(),
+            formParameters = parameters {
+                append("grant_type", "authorization_code")
+                append("client_id", config.kc.keycloakClient)
+                append("code", authCode)
+                append("redirect_uri", config.redirectUri)
+                append("code_verifier", config.codeVerifier)
+            }
+        )
+        val result = validateRequestTokenResponse(response)
+        when (result.first) {
+            is AuthResult.Success -> {
+                tokenService.setTokens(result.second)
+            }
+
+            else -> {
+                tokenService.setTokens(null)
+            }
+        }
+        return result.first
+    }
+
+    suspend fun validateRequestTokenResponse(response: HttpResponse): Pair<AuthResult, BearerTokens?> {
+        if (response.status != HttpStatusCode.OK) {
+            try {
+                val errorResponse = response.body<TokenErrorResponse>()
+                return Pair(
+                    AuthResult.Error(
+                        "ERR006",
+                        "HTTP-Fehler ${response.status.value} beim Abholen der Zugriffstoken",
+                        "${errorResponse.error}: ${errorResponse.errorDescription ?: ""}"
+                    ), null
+                )
+            } catch (e: Exception) {
+                // Fehler beim JSON-Konvertieren
+                val errorResponse = response.bodyAsText()
+                return Pair(
+                    AuthResult.Error(
+                        "ERR006",
+                        "HTTP-Fehler ${response.status.value} beim Abholen der Zugriffstoken",
+                        errorResponse
+                    ), null
+                )
+            }
+        }
+        val tokenResponse: TokenResponse = try {
+            response.body<TokenResponse>()
+        } catch (e: Exception) {
+            // Fehler beim JSON-Konvertieren
+            return Pair(
+                AuthResult.Fatal(
+                    "ERR007",
+                    "Schwerer Fehler",
+                    "Ungültige Daten beim Abholen der Zugriffstoken. Mögliche Ursachen: Netzwerkfehler, Serverfehler oder Malware."
+                ), null
+            )
+        }
+
+        return Pair(
+            AuthResult.Success(),
+            BearerTokens(
+                tokenResponse.accessToken,
+                tokenResponse.refreshToken
+            )
+        )
+    }
+
+//    suspend fun requestUserInfo(
+//        accessToken: String,
+//    ) {
+//        val config = AuthenticationConfig(keycloakServerHostname, keycloakRealm, keycloakClient)
+//
+//        val response = httpClient.get(
+//            url = buildUrl {
+//                protocol = URLProtocol.HTTPS
+//                host = config.keycloakServerHostname
+//                path(config.userinfoEndpoint)
+//            },
+////            formParameters = parameters {
+////                append("grant_type", "refresh_token")
+////                append("client_id", config.keycloakClient)
+////                append("refresh_token", refreshToken)
+////            }
+//        ) {
+//            headers { append("Authorization", "Bearer $accessToken") }
+//        }
+//
+//        println("Status: ${response.status}")
+//        println("Body: ${response.bodyAsText()}")
+//
+//    }
+
+    private suspend fun testServerConnection(config: AuthRun): Boolean {
+        val response: HttpResponse = httpClient.request(
+            url = buildUrl {
+                protocol = URLProtocol.HTTPS
+                host = config.kc.keycloakServerHostname
+                encodedPath = config.kc.certificatesEndpoint
+            }
+        )
+        return response.status.value < 400
+    }
+
+    /*
+    access token:
+
+{
+  "exp": 1769839803,
+  "iat": 1769839503,
+  "auth_time": 1769839502,
+  "jti": "onrtac:f0ea9436-470d-7d1d-fd9d-b43d2f075c46",
+  "iss": "https://kec.keinekekse.net/realms/app-server-realm",
+  "aud": "account",
+  "sub": "b5b40fa3-468f-443c-8eb0-e220bdd353bc",
+  "typ": "Bearer",
+  "azp": "pkce-book-app",
+  "sid": "n_TeXWIUSV66OkYwoc0D1og9",
+  "acr": "1",
+  "allowed-origins": [
+    "http://127.0.0.1",
+    "https://kas.keinekekse.net"
+  ],
+  "realm_access": {
+    "roles": [
+      "offline_access",
+      "default-roles-app-server-realm",
+      "uma_authorization",
+      "book-admin"
+    ]
+  },
+  "resource_access": {
+    "account": {
+      "roles": [
+        "manage-account",
+        "manage-account-links",
+        "view-profile"
+      ]
+    }
+  },
+  "scope": "openid profile email",
+  "email_verified": true,
+  "name": "Hartmut Bauer",
+  "preferred_username": "hb42",
+  "given_name": "Hartmut",
+  "family_name": "Bauer",
+  "email": "hb242@pm.me"
+}
+
+-> realm_access:
+
+            implementation(libs.ktor.serverAuthJwt)
+
+        val decod = JWT().decodeJwt(tokenResponse.accessToken!!)
+        // claims, die nur String enthalten: getClaim("claim-name")
+        // für andere: "{" -> asMap<String, Any> => cast!
+        //             "[" -> asList(Class<T>)
+        val roles: List<String> = decod.getClaim("realm_access").asMap()["roles"] as List<String>
+        roles.forEach { println(it) }
+
+
+     */
+}
@@ -0,0 +1,166 @@
+package net.keinekekse.app
+
+//import org.koin.plugin.module.dsl.startKoin
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.material3.Text
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.window.Window
+import androidx.compose.ui.window.application
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import net.keinekekse.app.auth.AuthResult
+import net.keinekekse.app.auth.Authenticator
+import net.keinekekse.app.books.di.KoinApp
+import net.keinekekse.app.ui.ProgressIndicator
+import org.koin.compose.koinInject
+import org.koin.plugin.module.dsl.startKoin
+
+//@PropertyValue("kc_server")
+//var keycloakServer: String = ""
+//
+//@PropertyValue("kc_realm")
+//var keycloakRealm: String = ""
+//
+//@PropertyValue("kc_client")
+//var keycloakClient: String = ""
+
+fun main() = application {
+
+    startKoin<KoinApp>()
+
+//    keycloakServer = "kec.keinekekse.net"
+//    keycloakRealm = "app-server-realm"
+//    keycloakClient = "pkce-book-app"
+
+//    val inj = koinInject<String>(named("AppString"))
+
+    val authResultState = remember { mutableStateOf<AuthResult?>(null) }
+
+    val authenticator: Authenticator = koinInject()
+
+    LaunchedEffect(Unit) {
+        authResultState.value = withContext(Dispatchers.IO) {
+            // TODO - (~) Verständnis für App-Aufbau und DI
+            //      - (x) das object muss global angelegt werden -> DI singleton
+            //      - (x) globale Speicherung der Tokens
+            //      - Tokens persistieren? Multiplatform! (evtl. library)
+            //      - (x) globaler httpClient mit Konfig für Tokens -> DI
+            //      - (x) Error-Handling: 401 -> refresh -> 401 -> reauth [implizit]
+//            Authenticator(
+//                "kec.keinekekse.net",
+//                "app-server-realm",
+//                "pkce-book-app",
+//            ).use {
+
+            val result = authenticator.authenticate()
+
+            when (result) {
+                is AuthResult.Success -> {
+//                    println("Access Token: ${result.tokens?.accessToken}")
+//                    println("Refresh Token: ${result.tokens?.refreshToken}")
+
+//                        delay(3000)
+                    /*
+                    // klappt, gibt aber nicht mehr her, als ohnehin im Token steht
+                    it.requestUserInfo(result.tokens!!.accessToken)
+                    */
+                    /*
+                    // funktioniert -> jetzt fehlt die DI-Mimik für die compose app
+                    when (val res = it.requestRefreshToken(result.tokens)) {
+                        is AuthResult.Success -> {
+                            println("Access Token: ${res.tokens?.accessToken}")
+                            println("Refresh Token: ${res.tokens?.refreshToken}")
+                        }
+
+                        is AuthResult.Error -> {
+                            println("Refresh Token fehlgeschlagen ${res.code}: ${res.details ?: ""}")
+                        }
+
+                        is AuthResult.Fatal -> {
+                            println("Refresh Token fehlgeschlagen ${res.code}: ${res.details ?: ""}")
+
+                        }
+                    }
+                    */
+                }
+
+                else -> {}
+            }
+
+            result
+            //  }
+        }
+    }
+    Window(
+        onCloseRequest = ::exitApplication,
+        title = "app",
+    ) {
+        when (val result = authResultState.value) {
+            null -> {
+                Column(
+                    modifier = Modifier.fillMaxSize(),
+                    horizontalAlignment = Alignment.CenterHorizontally,
+                    verticalArrangement = Arrangement.Center
+                ) {
+                    Text("Warten auf Anmeldung...")
+
+//                    Icon(
+//                        imageVector = Icons.Default.HourglassTop,
+//                        contentDescription = "Home",
+//                        modifier = Modifier.padding(top = 16.dp).size(32.dp)
+//                    )
+                    ProgressIndicator()
+                }
+            }
+
+            is AuthResult.Error -> {
+                // TODO show an error UI (and maybe a retry button)
+                Text("Fehler bei der Anmeldung: ${result.message} (${result.code})")
+                Text("Fehlerbeschreibung: ${result.details ?: ""}")
+//                App()
+            }
+
+            is AuthResult.Fatal -> {
+                Text("Fataler Fehler bei der Anmeldung: ${result.message} (${result.code})")
+                Text("Fehlerbeschreibung: ${result.details ?: ""}")
+            }
+
+            is AuthResult.Success -> {
+                val test = koinInject<TestAuth>()
+                CoroutineScope(Dispatchers.Default).launch {
+                    println("requesting '/'")
+                    test.request("/")
+                }
+                App()
+            }
+        }
+    }
+}
+//
+//@Composable
+//fun ProgressIndicator(animationSize: Int = 48, paddingTop: Int = 16, strokeWidth: Int = 5) {
+//    val primaryColor = MaterialTheme.colorScheme.primary
+//    val backgroundColor = MaterialTheme.colorScheme.background
+//    val strokewidth = strokeWidth.dp
+//    CircularProgressIndicator(
+//        modifier =
+//            Modifier.padding(top = paddingTop.dp).size(animationSize.dp).drawBehind {
+//                drawCircle(
+//                    primaryColor,
+//                    radius = size.width / 2 - strokewidth.toPx() / 2,
+//                    style = Stroke(strokewidth.toPx()),
+//
+//                    )
+//            },
+//        color = backgroundColor,
+//        strokeWidth = strokewidth
+//    )
+//}
@@ -0,0 +1,22 @@
+package net.keinekekse.app.service
+
+import io.ktor.client.*
+import io.ktor.client.plugins.auth.*
+import io.ktor.client.plugins.auth.providers.*
+import net.keinekekse.app.auth.Authenticator
+import org.koin.core.annotation.Single
+
+@Single
+fun createHttpClient(authenticator: Authenticator) = HttpClient {
+    install(Auth) {
+        bearer {
+            loadTokens {
+                authenticator.tokenService.getTokens()
+            }
+            refreshTokens {
+                authenticator.requestRefreshToken(oldTokens)
+                authenticator.tokenService.getTokens()
+            }
+        }
+    }
+}
@@ -0,0 +1,20 @@
+package net.keinekekse.app.service
+
+import io.ktor.client.plugins.auth.providers.*
+import org.koin.core.annotation.Single
+
+@Single
+class TokenService {
+    private var tokens: BearerTokens? = null
+
+    // TODO persist tokens
+
+    fun getTokens(): BearerTokens? = tokens
+    fun setTokens(tokens: BearerTokens? = null) {
+        this.tokens = tokens
+        println("set tokens")
+        println("Access Token: ${tokens?.accessToken}")
+        println("Refresh Token: ${tokens?.refreshToken}")
+    }
+
+}
@@ -0,0 +1,11 @@
+package net.keinekekse.app
+
+import androidx.compose.ui.ExperimentalComposeUiApi
+import androidx.compose.ui.window.ComposeViewport
+
+@OptIn(ExperimentalComposeUiApi::class)
+fun main() {
+    ComposeViewport {
+        App()
+    }
+}
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta content="width=device-width, initial-scale=1.0" name="viewport">
+  <title>app</title>
+  <link href="styles.css" rel="stylesheet" type="text/css">
+</head>
+<body style="text-align: center; align-content: center">
+<svg height="40" role="presentation" viewBox="0 0 50 50" width="40"
+     xmlns="http://www.w3.org/2000/svg">
+  <circle cx="25" cy="25" fill="none" r="20" stroke="#ccc" stroke-width="4"/>
+  <circle cx="25" cy="25" fill="none" r="20" stroke="#333" stroke-dasharray="90 125" stroke-linecap="round"
+          stroke-width="4">
+    <animateTransform attributeName="transform" dur="1s" from="0 25 25" repeatCount="indefinite" to="360 25 25"
+                      type="rotate"/>
+  </circle>
+</svg>
+<script src="composeApp.js" type="application/javascript"></script>
+</body>
+</html>
@@ -0,0 +1,7 @@
+html, body {
+    width: 100%;
+    height: 100%;
+    margin: 0;
+    padding: 0;
+    overflow: hidden;
+}
@@ -0,0 +1,12 @@
+plugins {
+    // this is necessary to avoid the plugins to be loaded multiple times
+    // in each subproject's classloader
+    alias(libs.plugins.composeHotReload) apply false
+    alias(libs.plugins.composeMultiplatform) apply false
+    alias(libs.plugins.composeCompiler) apply false
+    alias(libs.plugins.kotlinJvm) apply false
+    alias(libs.plugins.kotlinMultiplatform) apply false
+    alias(libs.plugins.ktor) apply false
+    alias(libs.plugins.kotlinSerialization) apply false
+    alias(libs.plugins.koin.compiler) apply false
+}
@@ -0,0 +1,4 @@
+#!/bin/bash
+
+rsync -rti --delete --stats server/build/install/server/* /Users/hb/mnt/nas/Server/vol/kas/app
+
@@ -0,0 +1,8 @@
+#Kotlin
+kotlin.code.style=official
+kotlin.daemon.jvmargs=-Xmx3072M
+org.jetbrains.compose.experimental.macos.enabled=true
+#Gradle
+org.gradle.jvmargs=-Xmx4096M -Dfile.encoding=UTF-8
+org.gradle.configuration-cache=true
+org.gradle.caching=true
@@ -0,0 +1,98 @@
+[versions]
+serverVersion = "0.1.0-beta.1"
+# z.Zt. ist nur major > 0.minor.patch möglich für Apple-Targets
+# -> https://youtrack.jetbrains.com/issue/CMP-2360
+# nach compose multiplatform 1.11 nochmal anschauen
+composeAppVersion = "1.0.0"
+
+androidx-lifecycle = "2.9.6"
+composeHotReload = "1.0.0"
+composeMultiplatform = "1.10.0"
+junit = "4.13.2"
+kotlin = "2.3.0"
+kotlin-wrappers-css = "2025.6.4"
+kotlinx-coroutines = "1.10.2"
+kotlinx-html = "0.12.0"
+koin-bom = "4.2.0-RC1"
+koin-plugin = "0.3.0"
+ktor = "3.4.0"
+logback = "1.5.26"
+material3 = "1.10.0-alpha05"
+uiDesktop = "1.7.0"
+
+[libraries]
+kotlin-test = { module = "org.jetbrains.kotlin:kotlin-test", version.ref = "kotlin" }
+kotlin-testJunit = { module = "org.jetbrains.kotlin:kotlin-test-junit", version.ref = "kotlin" }
+junit = { module = "junit:junit", version.ref = "junit" }
+# -- compose bundle
+androidx-lifecycle-viewmodelCompose = { module = "org.jetbrains.androidx.lifecycle:lifecycle-viewmodel-compose", version.ref = "androidx-lifecycle" }
+androidx-lifecycle-runtimeCompose = { module = "org.jetbrains.androidx.lifecycle:lifecycle-runtime-compose", version.ref = "androidx-lifecycle" }
+compose-runtime = { module = "org.jetbrains.compose.runtime:runtime", version.ref = "composeMultiplatform" }
+compose-foundation = { module = "org.jetbrains.compose.foundation:foundation", version.ref = "composeMultiplatform" }
+compose-material3 = { module = "org.jetbrains.compose.material3:material3", version.ref = "material3" }
+compose-materialIcons = { module = "org.jetbrains.compose.material:material-icons-extended", version.ref = "uiDesktop" }
+compose-ui = { module = "org.jetbrains.compose.ui:ui", version.ref = "composeMultiplatform" }
+compose-components-resources = { module = "org.jetbrains.compose.components:components-resources", version.ref = "composeMultiplatform" }
+compose-uiToolingPreview = { module = "org.jetbrains.compose.ui:ui-tooling-preview", version.ref = "composeMultiplatform" }
+# --
+kotlinx-coroutinesSwing = { module = "org.jetbrains.kotlinx:kotlinx-coroutines-swing", version.ref = "kotlinx-coroutines" }
+kotlinx-html = { module = "org.jetbrains.kotlinx:kotlinx-html", version.ref = "kotlinx-html" }
+kotlin-wrappersCss = { module = "org.jetbrains.kotlin-wrappers:kotlin-css-jvm", version.ref = "kotlin-wrappers-css" }
+logback = { module = "ch.qos.logback:logback-classic", version.ref = "logback" }
+ktor-serverCore = { module = "io.ktor:ktor-server-core", version.ref = "ktor" }
+ktor-serverNetty = { module = "io.ktor:ktor-server-netty", version.ref = "ktor" }
+ktor-serverCio = { module = "io.ktor:ktor-server-cio", version.ref = "ktor" }
+ktor-serverAuth = { module = "io.ktor:ktor-server-auth", version.ref = "ktor" }
+ktor-serverAuthJwt = { module = "io.ktor:ktor-server-auth-jwt", version.ref = "ktor" }
+ktor-serverAuthApiKey = { module = "io.ktor:ktor-server-auth-api-key", version.ref = "ktor" }
+ktor-serializationJson = { module = "io.ktor:ktor-serialization-kotlinx-json", version.ref = "ktor" }
+ktor-callLogging = { module = "io.ktor:ktor-call-logging", version.ref = "ktor" }
+ktor-serverHtmlBuilder = { module = "io.ktor:ktor-server-html-builder", version.ref = "ktor" }
+ktor-serverHtmx = { module = "io.ktor:ktor-server-htmx", version.ref = "ktor" }
+ktor-htmxHtml = { module = "io.ktor:ktor-htmx-html", version.ref = "ktor" }
+ktor-serverContentNegotiation = { module = "io.ktor:ktor-server-content-negotiation", version.ref = "ktor" }
+ktor-serverTestHost = { module = "io.ktor:ktor-server-test-host-jvm", version.ref = "ktor" }
+ktor-client = { module = "io.ktor:ktor-client-core", version.ref = "ktor" }
+ktor-clientAuth = { module = "io.ktor:ktor-client-auth", version.ref = "ktor" }
+ktor-clientLogging = { module = "io.ktor:ktor-client-logging", version.ref = "ktor" }
+ktor-clientContentNegotiation = { module = "io.ktor:ktor-client-content-negotiation", version.ref = "ktor" }
+ktor-clientJava = { module = "io.ktor:ktor-client-java", version.ref = "ktor" }
+ktor-clientOkHttp = { module = "io.ktor:ktor-client-okhttp", version.ref = "ktor" }
+ktor-clientDarwin = { module = "io.ktor:ktor-client-darwin", version.ref = "ktor" }
+ktor-clientWinHttp = { module = "io.ktor:ktor-client-winhttp", version.ref = "ktor" }
+ktor-clientCurl = { module = "io.ktor:ktor-client-curl", version.ref = "ktor" }
+ktor-clientJs = { module = "io.ktor:ktor-client-js", version.ref = "ktor" }
+ktor-clientCio = { module = "io.ktor:ktor-client-cio", version.ref = "ktor" }
+androidx-ui-desktop = { group = "androidx.compose.ui", name = "ui-desktop", version.ref = "uiDesktop" }
+# -- Koin
+koin-bom = { module = "io.insert-koin:koin-bom", version.ref = "koin-bom" }
+koin-core = { module = "io.insert-koin:koin-core" }
+koin-annotations = { module = "io.insert-koin:koin-annotations" }
+koin-android = { module = "io.insert-koin:koin-android" }
+koin-androidx-compose = { module = "io.insert-koin:koin-androidx-compose" }
+koin-compose = { module = "io.insert-koin:koin-compose" }
+koin-compose-viewmodel = { module = "io.insert-koin:koin-compose-viewmodel" }
+koin-compose-viewmodel-navigation = { module = "io.insert-koin:koin-compose-viewmodel-navigation" }
+# z.Zt. alpha
+#koin-compose-viewmodel-navigation3 = { module = "io.insert-koin:koin-compose-viewmodel-navigation3" }
+koin-ktor = { module = "io.insert-koin:koin-ktor" }
+koin-test = { module = "io.insert-koin:koin-test" }
+# --
+
+[bundles]
+kotlin-compose = [
+    "compose-ui", "compose-runtime", "compose-foundation",
+    "compose-components-resources", "compose-uiToolingPreview", "compose-materialIcons",
+    "compose-material3",
+    "androidx-lifecycle-runtimeCompose", "androidx-lifecycle-viewmodelCompose"
+]
+
+[plugins]
+composeHotReload = { id = "org.jetbrains.compose.hot-reload", version.ref = "composeHotReload" }
+composeMultiplatform = { id = "org.jetbrains.compose", version.ref = "composeMultiplatform" }
+composeCompiler = { id = "org.jetbrains.kotlin.plugin.compose", version.ref = "kotlin" }
+kotlinJvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
+ktor = { id = "io.ktor.plugin", version.ref = "ktor" }
+kotlinMultiplatform = { id = "org.jetbrains.kotlin.multiplatform", version.ref = "kotlin" }
+kotlinSerialization = { id = "org.jetbrains.kotlin.plugin.serialization", version.ref = "kotlin" }
+koin-compiler = { id = "io.insert-koin.compiler.plugin", version.ref = "koin-plugin" }
@@ -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
@@ -0,0 +1,248 @@
+#!/bin/sh
+
+#
+# Copyright © 2015 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 "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$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 "$APP_HOME" )
+
+    JAVACMD=$( 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=$APP_BASE_NAME" \
+        -jar "$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 "$JAVACMD" "$@"
@@ -0,0 +1,93 @@
+@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
+
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -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
@@ -0,0 +1,8 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+"@js-joda/core@3.2.0":
+  version "3.2.0"
+  resolved "https://registry.yarnpkg.com/@js-joda/core/-/core-3.2.0.tgz#3e61e21b7b2b8a6be746df1335cf91d70db2a273"
+  integrity sha512-PMqgJ0sw5B7FKb2d5bWYIoxjri+QlW/Pys7+Rw82jSH0QN3rB05jZ/VrrsUdh1w4+i2kw9JOejXGq/KhDOX7Kg==
@@ -0,0 +1,40 @@
+plugins {
+    alias(libs.plugins.kotlinJvm)
+    alias(libs.plugins.ktor)
+    application
+    alias(libs.plugins.kotlinSerialization)
+    alias(masterLibs.plugins.versionPlugin)
+}
+
+group = "net.keinekekse.app"
+version = libs.versions.serverVersion.get()
+description = "ktor Application-Server"
+extra["displayname"] = "kAS"
+extra["copyright"] = "Copyright (c) 2026 Hartmut Bauer"
+
+application {
+    mainClass.set("net.keinekekse.app.ApplicationKt")
+
+    val isDevelopment: Boolean = project.ext.has("development")
+    applicationDefaultJvmArgs = listOf("-Dio.ktor.development=$isDevelopment")
+}
+
+dependencies {
+    implementation(masterLibs.utilLibrary)
+//    implementation(projects.shared)  // err wg. doppelter jar ??
+    implementation(libs.logback)
+    implementation(libs.ktor.serverCore)
+    implementation(libs.ktor.serverNetty)
+    implementation(libs.ktor.serverAuth)
+    implementation(libs.ktor.serverAuthApiKey)
+    implementation(libs.ktor.serverAuthJwt)
+    implementation(libs.ktor.serverContentNegotiation)
+    implementation(libs.ktor.serializationJson)
+
+    testImplementation(libs.ktor.serverTestHost)
+    testImplementation(libs.kotlin.testJunit)
+}
+
+kotlin {
+    jvmToolchain(masterLibs.versions.javaVersion.get().toInt())
+}
@@ -0,0 +1,3 @@
+#auto generated
+#Tue Feb 03 00:47:38 CET 2026
+build.number=19
@@ -0,0 +1,19 @@
+package net.keinekekse.app
+
+import io.ktor.server.application.*
+import io.ktor.server.engine.*
+import io.ktor.server.netty.*
+import net.keinekekse.app.server.VERSION
+import net.keinekekse.app.server.config.configureSecurity
+
+fun main() {
+//    embeddedServer(Netty, port = SERVER_PORT, host = "0.0.0.0", module = Application::module)
+    println("**\n** Starting  ${VERSION.displayName} - ${VERSION.description} ${VERSION.fullVersion}\n**")
+    embeddedServer(Netty, port = 7770, host = "0.0.0.0", module = Application::module)
+        .start(wait = true)
+}
+
+fun Application.module() {
+    configureSecurity()
+
+}
@@ -0,0 +1,18 @@
+package net.keinekekse.app.server
+
+import net.keinekekse.version.Version
+
+object VERSION: Version {
+    override val version = "0.1.0-beta.1+build.19"
+    override val fullVersion = "0.1.0-beta.1+build.19"
+    override val major = 0
+    override val minor = 1
+    override val patch = 0
+    override val preRelease = "beta.1"
+    override val buildMetadata = "build.19"
+    override val buildDate = "2026-02-02T23:47:38.629893Z"
+    override val displayName = "kAS"
+    override val copyright = "Copyright (c) 2026 Hartmut Bauer"
+    override val name = "server"
+    override val description = "ktor Application-Server"
+}
@@ -0,0 +1,22 @@
+package net.keinekekse.app.server.config
+
+import io.ktor.server.auth.jwt.*
+import java.security.Principal
+
+class AppPrincipal(credential: JWTCredential) : Principal {
+    val userId: String = credential.getClaim("preferred_username", String::class) ?: ""
+    val vorname: String = credential.getClaim("given_name", String::class) ?: ""
+    val nachname: String = credential.getClaim("family_name", String::class) ?: ""
+    val email: String = credential.getClaim("email", String::class) ?: ""
+    val roles: List<String>
+
+    init {
+        val realmAccess: Map<*, *>? = credential.getClaim("realm_access", Map::class)
+        val list = realmAccess?.get("roles")
+        roles = if (list is List<*>) list.map { it as String } else emptyList()
+    }
+
+    override fun getName(): String {
+        return "$userId ($vorname $nachname) <$email>"
+    }
+}
@@ -0,0 +1,55 @@
+package net.keinekekse.app.server.config
+
+import com.auth0.jwk.UrlJwkProvider
+import io.ktor.http.*
+import io.ktor.server.application.*
+import io.ktor.server.auth.*
+import io.ktor.server.auth.jwt.*
+import io.ktor.server.response.*
+import io.ktor.server.routing.*
+import net.keinekekse.app.server.VERSION
+import java.net.URI
+
+fun Application.configureSecurity() {
+
+    // TODO die Werte müssen aus der Config kommen
+
+    // Kommunikation funktioniert nur im internen Containernetzwerk,
+    // d.h. Container- bzw. Pod-Name + interner Port
+    val keycloakInternal = "http://kec:8080/realms"
+    val keycloak = "https://kec.keinekekse.net/realms"
+    val realm = "app-server-realm"
+    val clientId = "pkce-book-app"
+    val certUrl = "$keycloakInternal/$realm/protocol/openid-connect/certs"
+    val issuer = "$keycloak/$realm"
+    authentication {
+        jwt("auth-KC") {
+            verifier(
+                UrlJwkProvider(URI(certUrl).toURL()), issuer
+            ) {
+                withAudience("account")
+                withClaim("azp", clientId)
+            }
+            challenge { _, _ ->
+                call.respond(HttpStatusCode.Unauthorized, "Token is not valid or has expired")
+            }
+            validate { credential ->
+                AppPrincipal(credential)
+            }
+        }
+    }
+
+    routing {
+        authenticate("auth-KC") {
+            get("/") {
+                val principal = call.principal<AppPrincipal>()
+                call.respondText("Ktor ${VERSION.displayName} ${VERSION.fullVersion} - principal=${principal?.name}")
+            }
+
+            get("/test") {
+                val principal = call.principal<AppPrincipal>()
+                call.respondText("user: ${principal?.userId}")
+            }
+        }
+    }
+}
@@ -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>
@@ -0,0 +1,43 @@
+rootProject.name = "app"
+enableFeaturePreview("TYPESAFE_PROJECT_ACCESSORS")
+
+pluginManagement {
+    repositories {
+        maven("https://nexus.keinekekse.net/repository/maven-public/")
+        google {
+            mavenContent {
+                includeGroupAndSubgroups("androidx")
+                includeGroupAndSubgroups("com.android")
+                includeGroupAndSubgroups("com.google")
+            }
+        }
+        gradlePluginPortal()
+    }
+}
+
+dependencyResolutionManagement {
+    repositories {
+        maven("https://nexus.keinekekse.net/repository/maven-public/")
+        google {
+            mavenContent {
+                includeGroupAndSubgroups("androidx")
+                includeGroupAndSubgroups("com.android")
+                includeGroupAndSubgroups("com.google")
+            }
+        }
+    }
+    versionCatalogs {
+        create("masterLibs") {
+            from("net.keinekekse:version-catalog:128")
+        }
+    }
+
+}
+
+plugins {
+    id("org.gradle.toolchains.foojay-resolver-convention") version "1.0.0"
+}
+
+include(":books")
+include(":server")
+include(":shared")
@@ -0,0 +1,38 @@
+import org.jetbrains.kotlin.gradle.ExperimentalWasmDsl
+
+plugins {
+    alias(libs.plugins.kotlinMultiplatform)
+    alias(libs.plugins.composeCompiler)  // sonst fkt. Composable-Import nicht
+    alias(libs.plugins.koin.compiler)
+}
+
+kotlin {
+    jvm()
+
+    @OptIn(ExperimentalWasmDsl::class)
+    wasmJs {
+//        nodejs()
+        browser()
+    }
+    macosArm64()
+    // In einem Compose-Projekt gibt das Ärger, weil Compose nicht mit
+    // linux + mingw kompatibel ist. Sonst müsste alle UI über die
+    // restlichen Plattformen verstreut werden.
+//    linuxX64()
+//    mingwX64()
+
+    sourceSets {
+        commonMain.dependencies {
+            implementation(libs.bundles.kotlin.compose)
+
+        }
+        jvmMain.dependencies {
+        }
+        wasmJsMain.dependencies {
+        }
+        macosArm64Main.dependencies {
+        }
+
+    }
+    jvmToolchain(masterLibs.versions.javaVersion.get().toInt())
+}
@@ -0,0 +1,3 @@
+package net.keinekekse.app
+
+const val SERVER_PORT = 7770
@@ -0,0 +1,9 @@
+package net.keinekekse.app
+
+class Greeting {
+    private val platform = getPlatform()
+
+    fun greet(): String {
+        return "Hello, ${platform.name}!"
+    }
+}
@@ -0,0 +1,7 @@
+package net.keinekekse.app
+
+interface Platform {
+    val name: String
+}
+
+expect fun getPlatform(): Platform
@@ -0,0 +1,31 @@
+package net.keinekekse.app.ui
+
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.drawBehind
+import androidx.compose.ui.graphics.drawscope.Stroke
+import androidx.compose.ui.unit.dp
+
+@Composable
+fun ProgressIndicator(animationSize: Int = 48, paddingTop: Int = 16, strokeWidth: Int = 5) {
+    val primaryColor = MaterialTheme.colorScheme.primary
+    val backgroundColor = MaterialTheme.colorScheme.background
+    val strokewidth = strokeWidth.dp
+    CircularProgressIndicator(
+        modifier =
+            Modifier.padding(top = paddingTop.dp).size(animationSize.dp).drawBehind {
+                drawCircle(
+                    primaryColor,
+                    radius = size.width / 2 - strokewidth.toPx() / 2,
+                    style = Stroke(strokewidth.toPx()),
+
+                    )
+            },
+        color = backgroundColor,
+        strokeWidth = strokewidth
+    )
+}
@@ -0,0 +1,7 @@
+package net.keinekekse.app
+
+class JVMPlatform : Platform {
+    override val name: String = "Java ${System.getProperty("java.version")}"
+}
+
+actual fun getPlatform(): Platform = JVMPlatform()
@@ -0,0 +1,7 @@
+package net.keinekekse.app
+
+class MacOsPlatform : Platform {
+    override val name: String = "macOS"
+}
+
+actual fun getPlatform(): Platform = MacOsPlatform()
@@ -0,0 +1,7 @@
+package net.keinekekse.app
+
+class WasmPlatform : Platform {
+    override val name: String = "Web with Kotlin/Wasm"
+}
+
+actual fun getPlatform(): Platform = WasmPlatform()