add and use enum for SysEx message ids

mixer.py

@@ -19,6 +19,14 @@ class Mixer:
     SYSEX_HEADER = ALLEN_HEATH_ID + QU_MIXER + MAJOR_MINOR
     SYSEX_ALL_CALL = SYSEX_HEADER + ALL_CALL_MIDI_CHANNEL
 
+    class SysExMessageId(Enum):
+        GET_NAME_FROM_QU_REQUEST = 0x01,
+        GET_NAME_FROM_QU_RESPONSE = 0x02,
+        GET_SYSTEM_STATE_REQUEST = 0x10,
+        GET_SYSTEM_STATE_RESPONSE = 0x11,
+        GET_METER_DATA_REQUEST = 0x12,
+        GET_METER_DATA_RESPONSE = 0x13
+
     def recv(self):
         p = mido.Parser()
 
@@ -42,7 +50,7 @@ class Mixer:
                 return msg
 
     def get_system_state(self):
-        msg_id = 0x10
+        msg_id = self.SysExMessageId.GET_SYSTEM_STATE_REQUEST
         i_pad_flag = 0x01
 
         data = self.SYSEX_ALL_CALL + [msg_id, i_pad_flag]
@@ -87,7 +95,7 @@ class Mixer:
         print(f"Firmware Version: {major_ver}.{minor_ver}")
 
     def get_name_from_qu(self, channel_no, name_to_set):
-        msg_id = 0x01
+        msg_id = self.SysExMessageId.GET_NAME_FROM_QU_REQUEST
 
         data = self.SYSEX_HEADER + [int(0), msg_id, int(channel_no)]
 
@@ -173,35 +181,19 @@ def main():
     args = parser.parse_args()
 
     print(f"IP: {args.ip}")
+    mixer = Mixer(args.ip, MIXER_PORT)
 
     if args.command:
         print(f"Command: {args.command}")
         print(f"Args: {vars(args)}")
 
         match args.command:
-            case 'get_name_from_qu':
-                mixer = Mixer(args.ip, MIXER_PORT)
-                mixer.get_name_from_qu(args.channel_id, args.name)
-
-            case 'get_system_state':
-                mixer = Mixer(args.ip, MIXER_PORT)
-                mixer.get_system_state()
-
-            case 'shutdown':
-                mixer = Mixer(args.ip, MIXER_PORT)
-                mixer.shutdown()
-
-            case 'scene_recall':
-                mixer = Mixer(args.ip, MIXER_PORT)
-                mixer.scene_recall(args.scene_number)
-
-            case 'scene_recall_default':
-                mixer = Mixer(args.ip, MIXER_PORT)
-                mixer.scene_recall(0)
-
-            case 'watch':
-                mixer = Mixer(args.ip, MIXER_PORT)
-                mixer.watch()
+            case 'get_name_from_qu': mixer.get_name_from_qu(args.channel_id, args.name)
+            case 'get_system_state': mixer.get_system_state()
+            case 'shutdown': mixer.shutdown()
+            case 'scene_recall': mixer.scene_recall(args.scene_number)
+            case 'scene_recall_default': mixer.scene_recall(0)
+            case 'watch': mixer.watch()
 
 if __name__ == '__main__':
     main()