Enable synthesizing to wav files

app/src/main/java/io/bartek/tts/WebService.kt

@@ -15,29 +15,27 @@ import io.bartek.R
 import io.bartek.web.TTSServer
 
 class WebService : Service() {
+    private var port: Int = 8080
     private var wakeLock: PowerManager.WakeLock? = null
     private var isServiceStarted = false
     private var ttsServer: TTSServer? = null
 
     override fun onCreate() {
         super.onCreate()
-        Log.d("TTSService", "Service has been created")
         startForeground(1, createNotification())
     }
 
     private fun createNotification(): Notification {
-        val notificationChannelId = "HTTP SERVER CHANNEL"
-
         // depending on the Android API that we're dealing with we will have
         // to use a specific method to create the notification
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
             val notificationManager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager;
             val channel = NotificationChannel(
-                notificationChannelId,
-                "HTTP Server",
+                NOTIFICATION_CHANNEL_ID,
+                resources.getString(R.string.service_notification_category_name),
                 NotificationManager.IMPORTANCE_HIGH
             ).let {
-                it.description = "HTTP Server channel with keeps the service running"
+                it.description = resources.getString(R.string.service_notification_category_description)
                 it.enableLights(true)
                 it.lightColor = Color.RED
                 it.enableVibration(true)
@@ -53,12 +51,12 @@ class WebService : Service() {
 
         val builder: Notification.Builder = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) Notification.Builder(
             this,
-            notificationChannelId
+            NOTIFICATION_CHANNEL_ID
         ) else Notification.Builder(this)
 
         return builder
-            .setContentTitle("Endless Service")
-            .setContentText("This is your favorite endless service working")
+            .setContentTitle(resources.getString(R.string.service_notification_title))
+            .setContentText(resources.getString(R.string.service_notification_text, port))
             .setContentIntent(pendingIntent)
             .setSmallIcon(R.mipmap.ic_launcher)
             .setTicker("Ticker text")
@@ -66,16 +64,15 @@ class WebService : Service() {
             .build()
     }
 
-    override fun onBind(intent: Intent): IBinder? {
-        Log.d("TTSService", "Something is willing to bind the service")
-        return null
-    }
+    override fun onBind(intent: Intent) = null
 
     override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
-        Log.d("TTSService", "onStartCommand with startId: $startId")
         intent?.let {
             when(it.action) {
-                START -> startService(it.getIntExtra(PORT, 8080))
+                START -> {
+                    port = it.getIntExtra(PORT, port)
+                    startService()
+                }
                 STOP -> stopService()
             }
         }
@@ -87,13 +84,12 @@ class WebService : Service() {
         ttsServer = null
     }
 
-    private fun startService(port: Int) {
+    private fun startService() {
         if(isServiceStarted) return
-        Log.d("TTSService", "Starting service...")
         isServiceStarted = true
         wakeLock =
             (getSystemService(Context.POWER_SERVICE) as PowerManager).run {
-                newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "EndlessService::lock").apply {
+                newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "WebService::lock").apply {
                     acquire()
                 }
             }
@@ -101,7 +97,6 @@ class WebService : Service() {
     }
 
     private fun stopService() {
-        Log.d("TTSService", "Stopping service...")
         ttsServer?.stop()
         ttsServer = null
         wakeLock?.let {
@@ -115,6 +110,7 @@ class WebService : Service() {
     }
 
     companion object {
+        private const val NOTIFICATION_CHANNEL_ID = "TTSService.NOTIFICATION_CHANNEL"
         const val PORT = "TTSService.PORT"
         const val START = "START"
         const val STOP = "STOP"

app/src/main/java/io/bartek/web/TTSServer.kt

@@ -2,8 +2,13 @@ package io.bartek.web
 
 import android.content.Context
 import android.speech.tts.TextToSpeech
+import android.speech.tts.UtteranceProgressListener
+import android.util.Log
 import android.widget.Toast
 import fi.iki.elonen.NanoHTTPD
+import io.bartek.R
+import java.io.FileInputStream
+import java.io.InputStream
 import java.util.*
 
 class TTSServer(port: Int, private val context: Context) : NanoHTTPD(port), TextToSpeech.OnInitListener {
@@ -11,20 +16,57 @@ class TTSServer(port: Int, private val context: Context) : NanoHTTPD(port), Text
 
     override fun serve(session: IHTTPSession?): Response {
         tts.language = Locale("pl_PL")
-        tts.speak(session?.uri, TextToSpeech.QUEUE_ADD, null, "")
+        val uuid = UUID.randomUUID().toString()
+        val file = createTempFile("tmp_tts_server", ".wav")
+        val lock = Object()
+        var error = false
+        tts.setOnUtteranceProgressListener(object : UtteranceProgressListener() {
+            override fun onDone(utteranceId: String?) {
+                if(utteranceId == uuid) {
+                    synchronized(lock) {
+                        lock.notifyAll()
+                    }
+                }
+            }
 
-        return newFixedLengthResponse(""" { "message": "ok" } """)
+            override fun onError(utteranceId: String?) {
+                if(utteranceId == uuid) {
+                    error = true
+                    synchronized(lock) {
+                        lock.notifyAll()
+                    }
+                }
+            }
+
+            override fun onStart(utteranceId: String?) {}
+        })
+
+        synchronized(lock) {
+            tts.synthesizeToFile(session?.uri, null, file, uuid)
+            lock.wait()
+        }
+
+        val stream = FileInputStream(file)
+        val length = file.length()
+
+        Log.d("WAV", stream.toString())
+        Log.d("WAV", length.toString())
+
+        return when(error) {
+            false -> newFixedLengthResponse(Response.Status.OK, "audio/x-wav", stream, length)
+            else -> newFixedLengthResponse(Response.Status.INTERNAL_ERROR, "text/plain", "TTS error on $uuid")
+        }
     }
 
     override fun onInit(status: Int) = start()
 
     override fun start() {
         super.start()
-        Toast.makeText(context, "TTS-HTTP Server started", Toast.LENGTH_SHORT).show()
+        Toast.makeText(context, context.resources.getString(R.string.server_toast_service_started), Toast.LENGTH_SHORT).show()
     }
 
     override fun stop() {
         super.stop()
-        Toast.makeText(context, "TTS-HTTP Server stopped", Toast.LENGTH_SHORT).show()
+        Toast.makeText(context, context.resources.getString(R.string.server_toast_service_stopped), Toast.LENGTH_SHORT).show()
     }
 }

app/src/main/res/layout/activity_main.xml

@@ -18,7 +18,7 @@
             android:layout_height="wrap_content"
             android:layout_weight="1"
             android:ems="10"
-            android:hint="Server port"
+            android:hint="@string/main_activity_server_port"
             android:inputType="number"
             android:text="8080" />
 
@@ -28,7 +28,7 @@
             android:layout_height="wrap_content"
             android:layout_weight="2"
             android:onClick="startServer"
-            android:text="Run" />
+            android:text="@string/main_activity_run" />
 
         <Button
             android:id="@+id/stop"
@@ -36,7 +36,7 @@
             android:layout_height="wrap_content"
             android:layout_weight="2"
             android:onClick="stopServer"
-            android:text="Stop" />
+            android:text="@string/main_activity_stop" />
 
     </LinearLayout>
 
@@ -44,5 +44,5 @@
         android:id="@+id/ttsSettings"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:text="TTS Settings" />
+        android:text="@string/main_activity_tts_settings" />
 </LinearLayout>

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

@@ -1,3 +1,15 @@
 <resources>
-    <string name="app_name">TTSServer</string>
+    <string name="app_name">TTS Server</string>
+    <string name="service_notification_category_name">HTTP Server</string>
+    <string name="service_notification_category_description">The fixed notification keeping the HTTP server alive</string>
+    <string name="service_notification_title">Server is running</string>
+    <string name="service_notification_text">The HTTP server is listening on port %1$d</string>
+
+    <string name="server_toast_service_started">TTS-HTTP Server started</string>
+    <string name="server_toast_service_stopped">TTS-HTTP Server stopped</string>
+
+    <string name="main_activity_server_port">Server port</string>
+    <string name="main_activity_run">Run</string>
+    <string name="main_activity_stop">Stop</string>
+    <string name="main_activity_tts_settings">TTS Settings</string>
 </resources>