Add feedback_sound option [add-on: google_assistant] (#1356)

* Add feedback_sound option

* Revert exec command

* Use pulseaudio-utils and add volume option

* Update config.json

* Update feedback doc to a grouped

* Update changelog and version

Co-authored-by: Pascal Vizeli <pascal.vizeli@syshack.ch>

google_assistant/rootfs/usr/bin/hassio_gassistant.py

@@ -2,7 +2,8 @@
 import json
 import sys
 from pathlib import Path
-
+import subprocess
+import json
 import google.oauth2.credentials
 
 from google.assistant.library import Assistant
@@ -11,11 +12,23 @@ from google.assistant.library.device_helpers import register_device
 
 DEVICE_CONFIG = "/data/device.json"
 
+PACAT_MAX_VOLUME = 65536
+
+feedback = json.loads(sys.argv[4])
+feedback_volume = feedback.get("volume", 0) * PACAT_MAX_VOLUME // 100
+
+def play_sound(sound_file):
+    if feedback["enable"] and feedback_volume > 0:
+        subprocess.Popen(["paplay", "--volume={v}".format(v=feedback_volume), "/usr/share/sounds/{f}".format(f=sound_file)])
 
 def process_event(event):
     if event.type == EventType.ON_CONVERSATION_TURN_STARTED:
+        play_sound("start_sound.wav")
         print()
 
+    if event.type == EventType.ON_RECOGNIZING_SPEECH_FINISHED:
+        play_sound("end_sound.wav")
+        
     try:
         print(event)
     except UnicodeEncodeError as err:
@@ -29,8 +42,8 @@ if __name__ == '__main__':
     cred_json = Path(sys.argv[1])
     device_json = Path(DEVICE_CONFIG)
 
-    # open credentials
-    print("OAth with Google")
+    # Open credentials
+    print("OAuth with Google")
     with cred_json.open('r') as data:
         credentials = google.oauth2.credentials.Credentials(token=None, **json.load(data))
 
@@ -46,7 +59,7 @@ if __name__ == '__main__':
         device_model_id = sys.argv[3]
         last_device_id = None
 
-    # run assistant
+    # Run assistant
     print("Run Google Assistant SDK")
     with Assistant(credentials, device_model_id) as assistant:
         events = assistant.start()