I wanted to keep track of the current notifications on my Android phone. The fact is that the content of the sensor sensor.myphone_active_notification_count is really messy. So I created a template that I put as an attribute in a template entity, that gives that information in a filtered and well structured way.
So the result will look like this:
{
"io.homeassistant.companion.android": [
{
"bigText": "Back in 20 minutes if swiped",
"text": "Back in 20 minutes if swiped",
"title": "The clothes in the washing machine are ready for drying",
"channel_id": "rappels",
"group_id": "group_The clothes in the washing machine are ready for drying",
"is_clearable": true,
"is_ongoing": false,
"post_time": "2025-04-12 12:26:47",
"summaryText": "The clothes in the washing machine are ready for drying"
},
{
"bigText": "Back in 10 minutes if swiped",
"text": "Back in 10 minutes if swiped",
"title": "Take your pill",
"channel_id": "rappels",
"group_id": "group_Take your pill",
"is_clearable": true,
"is_ongoing": false,
"post_time": "2025-04-12 12:27:49",
"summaryText": "Take your pill"
}
],
"de.danoeh.antennapod": [
{
"text": "Rattrapage du 15 nov. 2024 : La vitesse des vinyles, et la vraisemblance des séries policières",
"title": "Moteur de recherche",
"category": "transport",
"channel_id": "playing",
"is_clearable": false,
"is_ongoing": false,
"post_time": "2025-04-12 11:26:24"
},
{
"channel_id": "cast_media_notification",
"group_id": "ranker_group",
"is_clearable": false,
"is_ongoing": false,
"post_time": "2025-04-12 11:09:49"
}
],
"org.fossify.messages": [
{
"text": "Texto",
"title": "Doe John",
"category": "msg",
"channel_id": "fossify_messages",
"is_clearable": true,
"is_ongoing": false,
"post_time": "2025-04-12 11:27:36"
}
],
"org.thoughtcrime.securesms": [
{
"text": "Signal 2",
"title": "Doe John",
"category": "msg",
"channel_id": "messages_2 : 161",
"group_id": "messages",
"is_clearable": true,
"is_ongoing": false,
"post_time": "2025-04-12 12:22:45"
}
]
}
While there is always room for customization, but so far the result pleases me. Juste replace with your actual sensor within the line:
{% set raw_attributes = states.sensor.myphone_active_notification_count.attributes %}
Here is the template:
{# Home Assistant Jinja template — Parse Android notifications and group by app, with fusion logic #}
{# Step 1: Define useful suffixes and prefixes for key parsing #}
{% set suffix_fields = ['category', 'channel_id', 'group_id', 'is_clearable', 'is_ongoing', 'post_time'] %}
{% set prefix_fields = ['text', 'bigText', 'title', 'summaryText'] %}
{# Step 2: Extract and reformat data into intermediate nested structure #}
{% set raw_attributes = states.sensor.myphone_active_notification_count.attributes %}
{% set parsed = namespace(notifications={}) %}
{% for key, value in raw_attributes.items() %}
{% if value in [none, '', 'null'] %}
{% continue %}
{% endif %}
{% if key.startswith('android.') %}
{% set parts = key[8:].split('_') %}
{% if parts[0] in prefix_fields %}
{% set parsed.notifications = combine(parsed.notifications, {parts[2]: {parts[1]: {parts[0]: value}}}, recursive=True) %}
{% endif %}
{% else %}
{% set parts = key.split('_', 2) %}
{% if parts[2] in suffix_fields %}
{% if parts[2] == 'post_time' %}
{% set value = (value // 1000) | timestamp_custom %}
{% endif %}
{% set parsed.notifications = combine(parsed.notifications, {parts[1]: {parts[0]: {parts[2]: value}}}, recursive=True) %}
{% endif %}
{% endif %}
{% endfor %}
{# Step 3: Convert dictionary into a list without the Android notification IDs #}
{% set app_list = namespace(notifs=[]) %}
{% for id in parsed.notifications %}
{% set app_list.notifs = app_list.notifs + [parsed.notifications[id]] %}
{% endfor %}
{# Step 4: Merge Home Assistant notifications when summaryText matches title or text #}
{% set output = namespace(grouped={}, current={}, merged_indexes=[]) %}
{% for item in app_list.notifs %}
{% set outer = loop %}
{% if loop.index in output.merged_indexes %}
{% continue %}
{% endif %}
{% set app = item.keys() | list | first %}
{% set output.current = item[app] %}
{% if app == 'io.homeassistant.companion.android' %}
{% if 'summaryText' in output.current %}
{% set ref_values = [output.current['summaryText']] %}
{% else %}
{% set ref_values = [output.current.get('title', ''), output.current.get('text', '')] %}
{% endif %}
{% if not outer.last %}
{% for index in range(outer.index0 + 1, app_list.notifs | count) %}
{% if not app in app_list.notifs[index] %}
{% continue %}
{% endif %}
{% set other = app_list.notifs[index][app] %}
{% if 'summaryText' in other %}
{% set compare_values = [other['summaryText']] %}
{% else %}
{% set compare_values = [other.get('title', ''), other.get('text', '')] %}
{% endif %}
{% if compare_values[0] in ref_values or ref_values[0] in compare_values %}
{% set output.merged_indexes = output.merged_indexes + [outer.index + loop.index] %}
{% set output.current = output.current | combine(other) %}
{% endif %}
{% endfor %}
{% endif %}
{% endif %}
{% if app in output.grouped %}
{% set output.grouped = output.grouped | combine({ app: output.grouped[app] + [output.current] }) %}
{% else %}
{% set output.grouped = output.grouped | combine({ app: [output.current] }) %}
{% endif %}
{% endfor %}
{{ output.grouped }}
Let me know what you think.