feat: added initial impl of tts service

fxgl-intelligence/src/main/java/com/almasb/fxgl/intelligence/WebAPI.java

@@ -14,9 +14,11 @@
  */
 public final class WebAPI {
 
+    public static final String TEXT_TO_SPEECH_API = "https://almasb.github.io/web-api/text-to-speech-v1/";
     public static final String SPEECH_RECOGNITION_API = "https://almasb.github.io/web-api/speech-recog/";
     public static final String GESTURE_RECOGNITION_API = "https://almasb.github.io/web-api/gesture-recog-v1/";
 
+    public static final int TEXT_TO_SPEECH_PORT = 55550;
     public static final int SPEECH_RECOGNITION_PORT = 55555;
     public static final int GESTURE_RECOGNITION_PORT = 55560;
 }

fxgl-intelligence/src/main/kotlin/com/almasb/fxgl/intelligence/tts/TextToSpeechService.kt

@@ -0,0 +1,90 @@
+/*
+ * FXGL - JavaFX Game Library. The MIT License (MIT).
+ * Copyright (c) AlmasB (almaslvl@gmail.com).
+ * See LICENSE for details.
+ */
+
+package com.almasb.fxgl.intelligence.tts
+
+import com.almasb.fxgl.core.EngineService
+import com.almasb.fxgl.core.concurrent.Async
+import com.almasb.fxgl.intelligence.WebAPI
+import com.almasb.fxgl.logging.Logger
+import com.almasb.fxgl.net.ws.LocalWebSocketServer
+import com.almasb.fxgl.speechrecog.SpeechRecognitionService
+import org.openqa.selenium.By
+import org.openqa.selenium.WebDriver
+import org.openqa.selenium.chrome.ChromeDriver
+import org.openqa.selenium.chrome.ChromeOptions
+
+/**
+ * TODO: remove duplicate code
+ *
+ * @author Almas Baim (https://github.com/AlmasB)
+ */
+class TextToSpeechService : EngineService() {
+
+    private val log = Logger.get(TextToSpeechService::class.java)
+    private val server = LocalWebSocketServer("TTSServer", WebAPI.TEXT_TO_SPEECH_PORT)
+
+    private var webDriver: WebDriver? = null
+
+    override fun onInit() {
+        server.start()
+    }
+
+    /**
+     * Starts this service in a background thread.
+     * Can be called after stop() to restart the service.
+     * If the service has already started, then calls stop() and restarts it.
+     */
+    fun start() {
+        Async.startAsync {
+            try {
+                if (webDriver != null) {
+                    stop()
+                }
+
+                val options = ChromeOptions()
+                options.addArguments("--headless=new")
+                options.addArguments("--use-fake-ui-for-media-stream")
+
+                webDriver = ChromeDriver(options)
+                webDriver!!.get(WebAPI.TEXT_TO_SPEECH_API)
+
+                // TODO: update web-api impl
+                // force it to play, so the audio output is initialized
+                webDriver!!.findElement(By.id("play")).click()
+
+                // we are ready to use the web api service
+            } catch (e: Exception) {
+                log.warning("Failed to start Chrome web driver. Ensure Chrome is installed in default location")
+                log.warning("Error data", e)
+            }
+        }
+    }
+
+    /**
+     * Stops this service.
+     * No-op if it has not started via start() before.
+     */
+    fun stop() {
+        try {
+            if (webDriver != null) {
+                webDriver!!.quit()
+                webDriver = null
+            }
+        } catch (e: Exception) {
+            log.warning("Failed to quit web driver", e)
+        }
+    }
+
+    fun speak(text: String) {
+        server.send(text)
+    }
+
+    override fun onExit() {
+        stop()
+        server.stop()
+    }
+}