Abstract MQTT from communication and make mqtt optional (#4462)

* Add option for mqtt config

* Setup communication layer

* Have a dispatcher which is responsible for handling and sending messages

* Move mqtt to communication

* Separate ws communications module

* Make ws client conform to communicator

* Cleanup imports

* Migrate to new dispatcher

* Clean up

* Need to set topic prefix

* Remove references to mqtt in dispatcher

* Don't start mqtt until dispatcher is subscribed

* Cleanup

* Shorten package

* Formatting

* Remove unused

* Cleanup

* Rename mqtt to ws on web

* Fix ws mypy

* Fix mypy

* Reformat

* Cleanup if/else chain

* Catch bad set commands

frigate/object_processing.py

@@ -12,6 +12,7 @@ from typing import Callable
 import cv2
 import numpy as np
 
+from frigate.comms.dispatcher import Dispatcher
 from frigate.config import (
     CameraConfig,
     MqttConfig,
@@ -20,7 +21,6 @@ from frigate.config import (
     FrigateConfig,
 )
 from frigate.const import CLIPS_DIR
-from frigate.mqtt import FrigateMqttClient
 from frigate.util import (
     SharedMemoryFrameManager,
     calculate_region,
@@ -633,7 +633,7 @@ class TrackedObjectProcessor(threading.Thread):
     def __init__(
         self,
         config: FrigateConfig,
-        client: FrigateMqttClient,
+        dispatcher: Dispatcher,
         topic_prefix,
         tracked_objects_queue,
         event_queue,
@@ -645,7 +645,7 @@ class TrackedObjectProcessor(threading.Thread):
         threading.Thread.__init__(self)
         self.name = "detected_frames_processor"
         self.config = config
-        self.client = client
+        self.dispatcher = dispatcher
         self.topic_prefix = topic_prefix
         self.tracked_objects_queue = tracked_objects_queue
         self.event_queue = event_queue
@@ -669,7 +669,7 @@ class TrackedObjectProcessor(threading.Thread):
                 "after": after,
                 "type": "new" if obj.previous["false_positive"] else "update",
             }
-            self.client.publish(
+            self.dispatcher.publish(
                 f"{self.topic_prefix}/events", json.dumps(message), retain=False
             )
             obj.previous = after
@@ -724,7 +724,7 @@ class TrackedObjectProcessor(threading.Thread):
                     "after": obj.to_dict(),
                     "type": "end",
                 }
-                self.client.publish(
+                self.dispatcher.publish(
                     f"{self.topic_prefix}/events", json.dumps(message), retain=False
                 )
 
@@ -746,14 +746,14 @@ class TrackedObjectProcessor(threading.Thread):
                         f"Unable to send mqtt snapshot for {obj.obj_data['id']}."
                     )
                 else:
-                    self.client.publish(
+                    self.dispatcher.publish(
                         f"{self.topic_prefix}/{camera}/{obj.obj_data['label']}/snapshot",
                         jpg_bytes,
                         retain=True,
                     )
 
         def object_status(camera, object_name, status):
-            self.client.publish(
+            self.dispatcher.publish(
                 f"{self.topic_prefix}/{camera}/{object_name}", status, retain=False
             )
 
@@ -853,7 +853,7 @@ class TrackedObjectProcessor(threading.Thread):
         if motion_boxes:
             # only send ON if motion isn't already active
             if self.last_motion_detected.get(camera, 0) == 0:
-                self.client.publish(
+                self.dispatcher.publish(
                     f"{self.topic_prefix}/{camera}/motion",
                     "ON",
                     retain=False,
@@ -866,7 +866,7 @@ class TrackedObjectProcessor(threading.Thread):
 
             # If no motion, make sure the off_delay has passed
             if frame_time - self.last_motion_detected.get(camera, 0) >= mqtt_delay:
-                self.client.publish(
+                self.dispatcher.publish(
                     f"{self.topic_prefix}/{camera}/motion",
                     "OFF",
                     retain=False,
@@ -962,7 +962,7 @@ class TrackedObjectProcessor(threading.Thread):
                         )
                         new_count = sum(zone_label.values())
                         if new_count != current_count:
-                            self.client.publish(
+                            self.dispatcher.publish(
                                 f"{self.topic_prefix}/{zone}/{label}",
                                 new_count,
                                 retain=False,
@@ -975,7 +975,7 @@ class TrackedObjectProcessor(threading.Thread):
                     else:
                         if label in obj_counter:
                             zone_label[camera] = obj_counter[label]
-                            self.client.publish(
+                            self.dispatcher.publish(
                                 f"{self.topic_prefix}/{zone}/{label}",
                                 obj_counter[label],
                                 retain=False,
@@ -992,7 +992,7 @@ class TrackedObjectProcessor(threading.Thread):
                     new_count = sum(zone_label.values())
 
                     if new_count != current_count:
-                        self.client.publish(
+                        self.dispatcher.publish(
                             f"{self.topic_prefix}/{zone}/all",
                             new_count,
                             retain=False,
@@ -1000,7 +1000,7 @@ class TrackedObjectProcessor(threading.Thread):
                 # if this is a new zone all label for this camera
                 else:
                     zone_label[camera] = total_label_count
-                    self.client.publish(
+                    self.dispatcher.publish(
                         f"{self.topic_prefix}/{zone}/all",
                         total_label_count,
                         retain=False,