Add total daily energy sensor (#220)

* Add total daily energy sensor

* Add test

esphomeyaml/components/sensor/total_daily_energy.py

@@ -0,0 +1,37 @@
+import voluptuous as vol
+
+from esphomeyaml.components import sensor
+from esphomeyaml.components.time import sntp
+import esphomeyaml.config_validation as cv
+from esphomeyaml.const import CONF_MAKE_ID, CONF_NAME, CONF_TIME_ID
+from esphomeyaml.helpers import App, Application, get_variable, variable
+
+DEPENDENCIES = ['time']
+
+CONF_POWER_ID = 'power_id'
+MakeTotalDailyEnergySensor = Application.MakeTotalDailyEnergySensor
+TotalDailyEnergy = sensor.sensor_ns.TotalDailyEnergy
+
+PLATFORM_SCHEMA = cv.nameable(sensor.SENSOR_PLATFORM_SCHEMA.extend({
+    cv.GenerateID(): cv.declare_variable_id(TotalDailyEnergy),
+    cv.GenerateID(CONF_MAKE_ID): cv.declare_variable_id(MakeTotalDailyEnergySensor),
+    cv.GenerateID(CONF_TIME_ID): cv.use_variable_id(sntp.SNTPComponent),
+    vol.Required(CONF_POWER_ID): cv.use_variable_id(None),
+}))
+
+
+def to_code(config):
+    for time in get_variable(config[CONF_TIME_ID]):
+        yield
+    for sens in get_variable(config[CONF_POWER_ID]):
+        yield
+    rhs = App.make_total_daily_energy_sensor(config[CONF_NAME], time, sens)
+    make = variable(config[CONF_MAKE_ID], rhs)
+    sensor.setup_sensor(make.Ptotal_energy, make.Pmqtt, config)
+
+
+BUILD_FLAGS = '-DUSE_TOTAL_DAILY_ENERGY_SENSOR'
+
+
+def to_hass_config(data, config):
+    return sensor.core_to_hass_config(data, config)

esphomeyaml/const.py

@@ -360,6 +360,7 @@ CONF_STEP_PIN = 'step_pin'
 CONF_DIR_PIN = 'dir_pin'
 CONF_SLEEP_PIN = 'sleep_pin'
 CONF_SEND_FIRST_AT = 'send_first_at'
+CONF_TIME_ID = 'time_id'
 CONF_RESTORE_STATE = 'restore_state'
 CONF_TIMING = 'timing'
 CONF_INVALID_COOLDOWN = 'invalid_cooldown'