add home-assistant nix configuration

hosts/fw.cloonar.com/modules/home-assistant/pc.nix

@@ -0,0 +1,46 @@
+{
+  services.home-assistant.config = {
+    "automation pc_switch" = {
+      alias = "switch pc";
+      hide_entity = true;
+      trigger = {
+        platform = "event";
+        event_type = "button_pressed";
+        event_data = {
+          id = [ 254 235 105 198 ];
+        };
+      };
+      action = {
+        service_template = "switch.turn_on";
+        data_template = {
+          entity_id = "switch.computer";
+        };
+      };
+    };
+    "automation pc power" = {
+      alias = "auto pc power off";
+      hide_entity = true;
+      trigger = {
+        platform = "state";
+        entity_id = "sensor.computer_power";
+      };
+      condition = {
+        condition = "and";
+        conditions = [
+          {
+            condition = "numeric_state";
+            entity_id = "sensor.computer_power";
+            below = 15;
+          }
+          "{{ (as_timestamp(now()) - as_timestamp(states.switch.computer.last_changed)) > 300 }}"
+        ];
+      };
+      action = {
+        service = "switch.turn_off";
+        target = {
+          entity_id = [ "switch.computer" ];
+        };
+      };
+    };
+  };
+}