cleanup ha notification docs

docs/docs/guides/ha_notifications.md

@@ -0,0 +1,56 @@
+---
+id: ha_notifications
+title: Home Assistant Notifications
+---
+
+The best way to get started with notifications for Frigate is to use the [Blueprint](https://community.home-assistant.io/t/frigate-mobile-app-notifications/311091). You can use the yaml generated from the Blueprint as a starting point and customize from there.
+
+It is generally recommended to trigger notifications based on the `frigate/events` mqtt topic. This provides the event_id needed to fetch [thumbnails/snapshots/clips](/integrations/home-assistant#notification-api) and other useful information to customize when and where you want to receive alerts. The data is published in the form of a change feed, which means you can reference the "previous state" of the object in the `before` section and the "current state" of the object in the `after` section. You can see an example [here](/integrations/mqtt#frigateevents).
+
+Here is a simple example of a notification automation of events which will update the existing notification for each change. This means the image you see in the notification will update as frigate finds a "better" image.
+
+```yaml
+automation:
+  - alias: Notify of events
+    trigger:
+      platform: mqtt
+      topic: frigate/events
+    action:
+      - service: notify.mobile_app_pixel_3
+        data_template:
+          message: 'A {{trigger.payload_json["after"]["label"]}} was detected.'
+          data:
+            image: 'https://your.public.hass.address.com/api/frigate/notifications/{{trigger.payload_json["after"]["id"]}}/thumbnail.jpg?format=android'
+            tag: '{{trigger.payload_json["after"]["id"]}}'
+            when: '{{trigger.payload_json["after"]["start_time"]|int}}'
+```
+
+## Conditions
+
+Conditions with the `before` and `after` values allow a high degree of customization for automations.
+
+When a person enters a zone named yard
+
+```yaml
+condition:
+  - "{{ trigger.payload_json['after']['label'] == 'person' }}"
+  - "{{ 'yard' in trigger.payload_json['after']['entered_zones'] }}"
+```
+
+When a person leaves a zone named yard
+
+```yaml
+condition:
+  - "{{ trigger.payload_json['after']['label'] == 'person' }}"
+  - "{{ 'yard' in trigger.payload_json['before']['current_zones'] }}"
+  - "{{ not 'yard' in trigger.payload_json['after']['current_zones'] }}"
+```
+
+Notify for dogs in the front with a high top score
+
+```yaml
+condition:
+  - "{{ trigger.payload_json['after']['label'] == 'dog' }}"
+  - "{{ trigger.payload_json['after']['camera'] == 'front' }}"
+  - "{{ trigger.payload_json['after']['top_score'] > 0.98 }}"
+```