Add support for color_temp_command_template in MQTT light component (#…

…19675)

* Add support for color_temp_command_template in MQTT light component

homeassistant/components/light/mqtt/schema_basic.py

@@ -34,6 +34,7 @@
 CONF_BRIGHTNESS_SCALE = 'brightness_scale'
 CONF_BRIGHTNESS_STATE_TOPIC = 'brightness_state_topic'
 CONF_BRIGHTNESS_VALUE_TEMPLATE = 'brightness_value_template'
+CONF_COLOR_TEMP_COMMAND_TEMPLATE = 'color_temp_command_template'
 CONF_COLOR_TEMP_COMMAND_TOPIC = 'color_temp_command_topic'
 CONF_COLOR_TEMP_STATE_TOPIC = 'color_temp_state_topic'
 CONF_COLOR_TEMP_VALUE_TEMPLATE = 'color_temp_value_template'
@@ -75,6 +76,7 @@
         vol.All(vol.Coerce(int), vol.Range(min=1)),
     vol.Optional(CONF_BRIGHTNESS_STATE_TOPIC): mqtt.valid_subscribe_topic,
     vol.Optional(CONF_BRIGHTNESS_VALUE_TEMPLATE): cv.template,
+    vol.Optional(CONF_COLOR_TEMP_COMMAND_TEMPLATE): cv.template,
     vol.Optional(CONF_COLOR_TEMP_COMMAND_TOPIC): mqtt.valid_publish_topic,
     vol.Optional(CONF_COLOR_TEMP_STATE_TOPIC): mqtt.valid_subscribe_topic,
     vol.Optional(CONF_COLOR_TEMP_VALUE_TEMPLATE): cv.template,
@@ -207,6 +209,8 @@ def _setup_from_config(self, config):
         self._templates = {
             CONF_BRIGHTNESS: config.get(CONF_BRIGHTNESS_VALUE_TEMPLATE),
             CONF_COLOR_TEMP: config.get(CONF_COLOR_TEMP_VALUE_TEMPLATE),
+            CONF_COLOR_TEMP_COMMAND_TEMPLATE:
+                config.get(CONF_COLOR_TEMP_COMMAND_TEMPLATE),
             CONF_EFFECT: config.get(CONF_EFFECT_VALUE_TEMPLATE),
             CONF_HS: config.get(CONF_HS_VALUE_TEMPLATE),
             CONF_RGB: config.get(CONF_RGB_VALUE_TEMPLATE),
@@ -682,6 +686,13 @@ async def async_turn_on(self, **kwargs):
         if ATTR_COLOR_TEMP in kwargs and \
            self._topic[CONF_COLOR_TEMP_COMMAND_TOPIC] is not None:
             color_temp = int(kwargs[ATTR_COLOR_TEMP])
+            tpl = self._templates[CONF_COLOR_TEMP_COMMAND_TEMPLATE]
+
+            if tpl:
+                color_temp = tpl.async_render({
+                    'value': color_temp,
+                })
+
             mqtt.async_publish(
                 self.hass, self._topic[CONF_COLOR_TEMP_COMMAND_TOPIC],
                 color_temp, self._config.get(CONF_QOS),

homeassistant/components/mqtt/discovery.py

@@ -68,6 +68,7 @@
     'bri_scl': 'brightness_scale',
     'bri_stat_t': 'brightness_state_topic',
     'bri_val_tpl': 'brightness_value_template',
+    'clr_temp_cmd_tpl': 'color_temp_command_template',
     'clr_temp_cmd_t': 'color_temp_command_topic',
     'clr_temp_stat_t': 'color_temp_state_topic',
     'clr_temp_val_tpl': 'color_temp_value_template',

tests/components/light/test_mqtt.py

@@ -678,6 +678,37 @@ async def test_sending_mqtt_rgb_command_with_template(hass, mqtt_mock):
     assert (255, 128, 63) == state.attributes['rgb_color']
 
 
+async def test_sending_mqtt_color_temp_command_with_template(hass, mqtt_mock):
+    """Test the sending of Color Temp command with template."""
+    config = {light.DOMAIN: {
+        'platform': 'mqtt',
+        'name': 'test',
+        'command_topic': 'test_light_color_temp/set',
+        'color_temp_command_topic': 'test_light_color_temp/color_temp/set',
+        'color_temp_command_template': '{{ (1000 / value) | round(0) }}',
+        'payload_on': 'on',
+        'payload_off': 'off',
+        'qos': 0
+    }}
+
+    assert await async_setup_component(hass, light.DOMAIN, config)
+
+    state = hass.states.get('light.test')
+    assert STATE_OFF == state.state
+
+    common.async_turn_on(hass, 'light.test', color_temp=100)
+    await hass.async_block_till_done()
+
+    mqtt_mock.async_publish.assert_has_calls([
+        mock.call('test_light_color_temp/set', 'on', 0, False),
+        mock.call('test_light_color_temp/color_temp/set', '10', 0, False),
+    ], any_order=True)
+
+    state = hass.states.get('light.test')
+    assert STATE_ON == state.state
+    assert 100 == state.attributes['color_temp']
+
+
 async def test_show_brightness_if_only_command_topic(hass, mqtt_mock):
     """Test the brightness if only a command topic is present."""
     config = {light.DOMAIN: {