many changes and more modularizing

hosts/fw-new/modules/home-assistant/battery.nix

@@ -0,0 +1,91 @@
+{
+  services.home-assistant.config = {
+    sensor = [
+      {
+        platform = "template";
+        sensors = {
+          sensors_lowest_battery_level = {
+            friendly_name = "Lowest battery level (Sensors)";
+            entity_id = "sun.sun";
+            device_class = "battery";
+            unit_of_measurement = "%";
+            value_template = ''
+              {% set domains = ['sensor', 'battery'] %}
+              {% set ns = namespace(min_batt=100, entities=[]) %}
+              {%- set exclude_sensors = ['sensor.sensors_lowest_battery_level','sensor.dominiks_iphone_battery_level'] -%}
+              {% for domain in domains %}
+                {% set ns.entities = states[domain] %}
+                {% for sensor in exclude_sensors %}
+                  {% set ns.entities = ns.entities | rejectattr('entity_id', 'equalto', sensor) %}
+                {% endfor %}
+                {% set batt_sensors = ns.entities | selectattr('attributes.device_class','equalto','battery') | map(attribute='state') | reject('equalto', 'unknown') | reject('equalto', 'None') | map('int') | reject('equalto', 0) | list %}
+                {% set batt_attrs = ns.entities | selectattr('attributes.battery_level','defined') | map(attribute='attributes.battery_level') | reject('equalto', 'unknown') | reject('equalto', 'None') | map('int') | reject('equalto', 0) | list %}
+                {% set batt_lvls = batt_sensors + batt_attrs %}
+                {% if batt_lvls|length > 0 %}
+                  {% set _min = batt_lvls|min %}
+                  {% if _min < ns.min_batt %}
+                    {% set ns.min_batt = _min %}
+                  {% endif %}
+                {% endif %}
+              {% endfor %}
+              {{ ns.min_batt }}         
+            '';
+          };
+        };
+      }
+    ];
+    binary_sensor = [
+      {
+        platform = "template";
+        sensors = {
+          sensor_low_battery = {
+            value_template = "{{ states('sensor.sensors_lowest_battery_level')|int <= 30 }}";
+            friendly_name = "A sensor has low battery";
+            device_class = "problem";
+          };
+        };
+      }
+    ];
+    alert = {
+      sensor_low_battery = {
+        name = "Sensor has low battery!";
+        message = ''
+          {% set domains = ['sensor', 'battery'] %}
+          {% set threshold = 30 %}
+          {%- set exclude_entities = ['sensor.sensors_lowest_battery_level','sensor.dominiks_iphone_battery_level','sensor.roborock_s8_pro_ultra_battery'] -%}
+          Sensors are below 50% battery:
+          {% for domain in domains %}
+            {% for item in states[domain] %}
+              {% if item.entity_id not in exclude_entities %}
+                {% if item.attributes.battery_level is defined %}
+                  {% set level = item.attributes.battery_level|int %}
+                  {% if level > 0 and level < threshold %}
+          - {{ item.attributes.friendly_name }} ({{ item.attributes['battery_level']|int}}%)
+                  {%- endif -%}
+                {% endif %}
+                {% if item.attributes.device_class is defined and item.attributes.device_class == 'battery' %}
+                  {% set level = item.state|int %}
+                  {% if level > 0 and level <= threshold %}
+          - {{ item.attributes.friendly_name }} ({{ item.state|int }}%)
+                  {% endif %}
+                {% endif %}
+              {% endif %}
+            {% endfor %}
+          {% endfor %}      
+        '';
+        entity_id = "binary_sensor.sensor_low_battery";
+        state = "on";
+        repeat = [
+          5
+          60
+          360
+        ];
+        skip_first = true;
+        can_acknowledge = true;
+        notifiers = [
+          "NotificationGroup"
+        ];
+      };
+    };
+  };
+}