Improve playFileOnRequest: add file existence check, better logging, catch all exceptions

bridge_master.py

@@ -766,14 +766,27 @@ def playFileOnRequest(self,fileNumber):
     _lang = CONFIG['SYSTEMS'][system]['ANNOUNCEMENT_LANGUAGE']
     _nine = bytes_3(9)
     _source_id = bytes_3(5000)
-    logger.debug('(%s) Sending contents of AMBE file: %s',system,fileNumber)
+
+    _ambe_file = '/{}/ondemand/{}.ambe'.format(_lang, fileNumber)
+    _full_path = os.path.join('./Audio', _lang, 'ondemand', '{}.ambe'.format(fileNumber))
+
+    if not os.path.isfile(_full_path):
+        logger.warning('(%s) AMBE file not found: %s', system, _full_path)
+        return
+
+    logger.info('(%s) Playing on-demand AMBE file: %s (ID: %s)', system, _full_path, fileNumber)
     sleep(1)
     _say = []
     try:
-        _say.append(AMBEobj.readSingleFile(''.join(['/',_lang,'/ondemand/',str(fileNumber),'.ambe'])))
-    except IOError:
-        logger.warning('(%s) cannot read file for number %s',system,fileNumber)
+        _say.append(AMBEobj.readSingleFile(_ambe_file))
+    except Exception as e:
+        logger.warning('(%s) Error reading AMBE file %s: %s', system, _full_path, e)
+        return
+
+    if not _say or not _say[0]:
+        logger.warning('(%s) AMBE file empty or invalid: %s', system, _full_path)
         return
+
     speech = pkt_gen(_source_id, _nine, bytes_4(9), 1, _say)
     sleep(1)
     _slot  = systems[system].STATUS[2]
@@ -782,12 +795,11 @@ def playFileOnRequest(self,fileNumber):
             pkt = next(speech)
         except StopIteration:
                 break
-        #Packet every 60ms
         sleep(0.058)
         _stream_id = pkt[16:20]
         _pkt_time = time()
         reactor.callFromThread(sendVoicePacket,self,pkt,_source_id,_nine,_slot)
-    logger.debug('(%s) Sending AMBE file %s end',system,fileNumber)    
+    logger.info('(%s) On-demand playback complete: %s', system, fileNumber)
 
 def threadIdent():
     logger.debug('(IDENT) starting ident thread')