Desktop app: shell and library screens

core/jellyfin/src/desktopMain/kotlin/ru/stenfredd/sleepyowl/core/jellyfin/DesktopJellyfinPlatform.kt

@@ -1,8 +1,23 @@
 package ru.stenfredd.sleepyowl.core.jellyfin
 
+import org.jellyfin.sdk.JellyfinOptions
+import org.jellyfin.sdk.model.DeviceInfo
 import java.io.File
+import java.util.UUID
 
 class DesktopJellyfinPlatform : JellyfinPlatform {
     // /etc/hostname rather than InetAddress: that one may wait for DNS.
-    override val deviceName = "SleepyOwl · " + (runCatching { File("/etc/hostname").readText().trim() }.getOrNull()?.ifEmpty { null } ?: "Linux")
+    override val deviceName = "SleepyOwl · " + (readLine("/etc/hostname") ?: "Linux")
+
+    /**
+     * The SDK's default device: on Android it comes from the system, on the desktop it has to be given — server
+     * discovery and probing (`ServerLogin.find`) create their API clients with it. Signed-in clients use the
+     * account's saved device id instead. The id is this machine's (`/etc/machine-id`), hashed.
+     */
+    override fun configure(options: JellyfinOptions.Builder) {
+        val machine = readLine("/etc/machine-id") ?: deviceName
+        options.deviceInfo = DeviceInfo(id = UUID.nameUUIDFromBytes(machine.toByteArray()).toString(), name = deviceName)
+    }
+
+    private fun readLine(path: String) = runCatching { File(path).readText().trim() }.getOrNull()?.ifEmpty { null }
 }