Desktop app: shell and library screens

core/common/src/desktopMain/kotlin/ru/stenfredd/sleepyowl/core/common/Log.desktop.kt

@@ -1,11 +1,33 @@
 package ru.stenfredd.sleepyowl.core.common
 
+import java.io.File
+import java.io.PrintStream
+import java.time.LocalDateTime
 import java.time.LocalTime
 import java.time.format.DateTimeFormatter
 
 private val TIME = DateTimeFormatter.ofPattern("HH:mm:ss.SSS")
 private val LEVELS = mapOf(Log.DEBUG to 'D', Log.INFO to 'I', Log.WARN to 'W', Log.ERROR to 'E')
 
+/** The log file of this run, see [logToFile]; written next to stderr. */
+@Volatile
+private var file: PrintStream? = null
+
+/**
+ * Also writes the log into `dir/sleepyowl.log`; the previous run's file is kept as `sleepyowl.1.log`.
+ * Called once by the desktop app at start.
+ */
+fun logToFile(dir: File) {
+    runCatching {
+        dir.mkdirs()
+        val current = File(dir, "sleepyowl.log")
+        if (current.exists()) current.renameTo(File(dir, "sleepyowl.1.log"))
+        file = PrintStream(current.outputStream().buffered(), true, Charsets.UTF_8).also {
+            it.println("---- ${LocalDateTime.now()}")
+        }
+    }.onFailure { System.err.println("Log file not opened in $dir: $it") }
+}
+
 internal actual fun logEnabled() = true
 
 internal actual fun platformLog(priority: Int, tag: String, t: Throwable?, message: String, args: Array<out Any?>) {
@@ -14,5 +36,9 @@ internal actual fun platformLog(priority: Int, tag: String, t: Throwable?, messa
     synchronized(System.err) {
         System.err.println(line)
         t?.printStackTrace()
+        file?.let { out ->
+            out.println(line)
+            t?.printStackTrace(out)
+        }
     }
 }

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 }
 }