add lights on off triggers (#1037)

* add lights on off triggers

* add test

esphome/components/light/__init__.py

@@ -1,15 +1,18 @@
 import esphome.codegen as cg
 import esphome.config_validation as cv
+import esphome.automation as auto
 from esphome.components import mqtt, power_supply
 from esphome.const import CONF_COLOR_CORRECT, \
     CONF_DEFAULT_TRANSITION_LENGTH, CONF_EFFECTS, CONF_GAMMA_CORRECT, CONF_ID, \
-    CONF_INTERNAL, CONF_NAME, CONF_MQTT_ID, CONF_POWER_SUPPLY, CONF_RESTORE_MODE
+    CONF_INTERNAL, CONF_NAME, CONF_MQTT_ID, CONF_POWER_SUPPLY, CONF_RESTORE_MODE, \
+    CONF_ON_TURN_OFF, CONF_ON_TURN_ON, CONF_TRIGGER_ID
 from esphome.core import coroutine, coroutine_with_priority
 from .automation import light_control_to_code  # noqa
 from .effects import validate_effects, BINARY_EFFECTS, \
     MONOCHROMATIC_EFFECTS, RGB_EFFECTS, ADDRESSABLE_EFFECTS, EFFECTS_REGISTRY
 from .types import (  # noqa
-    LightState, AddressableLightState, light_ns, LightOutput, AddressableLight)
+    LightState, AddressableLightState, light_ns, LightOutput, AddressableLight, \
+    LightTurnOnTrigger, LightTurnOffTrigger)
 
 IS_PLATFORM_COMPONENT = True
 
@@ -26,6 +29,12 @@ LIGHT_SCHEMA = cv.MQTT_COMMAND_COMPONENT_SCHEMA.extend({
     cv.OnlyWith(CONF_MQTT_ID, 'mqtt'): cv.declare_id(mqtt.MQTTJSONLightComponent),
     cv.Optional(CONF_RESTORE_MODE, default='restore_default_off'):
         cv.enum(RESTORE_MODES, upper=True, space='_'),
+    cv.Optional(CONF_ON_TURN_ON): auto.validate_automation({
+        cv.GenerateID(CONF_TRIGGER_ID): cv.declare_id(LightTurnOnTrigger),
+    }),
+    cv.Optional(CONF_ON_TURN_OFF): auto.validate_automation({
+        cv.GenerateID(CONF_TRIGGER_ID): cv.declare_id(LightTurnOffTrigger),
+    }),
 })
 
 BINARY_LIGHT_SCHEMA = LIGHT_SCHEMA.extend({
@@ -62,6 +71,13 @@ def setup_light_core_(light_var, output_var, config):
     effects = yield cg.build_registry_list(EFFECTS_REGISTRY, config.get(CONF_EFFECTS, []))
     cg.add(light_var.add_effects(effects))
 
+    for conf in config.get(CONF_ON_TURN_ON, []):
+        trigger = cg.new_Pvariable(conf[CONF_TRIGGER_ID], light_var)
+        yield auto.build_automation(trigger, [], conf)
+    for conf in config.get(CONF_ON_TURN_OFF, []):
+        trigger = cg.new_Pvariable(conf[CONF_TRIGGER_ID], light_var)
+        yield auto.build_automation(trigger, [], conf)
+
     if CONF_COLOR_CORRECT in config:
         cg.add(output_var.set_correction(*config[CONF_COLOR_CORRECT]))
 

esphome/components/light/automation.h

@@ -98,6 +98,40 @@ template<typename... Ts> class LightIsOffCondition : public Condition<Ts...> {
   LightState *state_;
 };
 
+class LightTurnOnTrigger : public Trigger<> {
+ public:
+  LightTurnOnTrigger(LightState *a_light) {
+    a_light->add_new_remote_values_callback([this, a_light]() {
+      auto is_on = a_light->current_values.is_on();
+      if (is_on && !last_on_) {
+        this->trigger();
+      }
+      last_on_ = is_on;
+    });
+    last_on_ = a_light->current_values.is_on();
+  }
+
+ protected:
+  bool last_on_;
+};
+
+class LightTurnOffTrigger : public Trigger<> {
+ public:
+  LightTurnOffTrigger(LightState *a_light) {
+    a_light->add_new_remote_values_callback([this, a_light]() {
+      auto is_on = a_light->current_values.is_on();
+      if (!is_on && last_on_) {
+        this->trigger();
+      }
+      last_on_ = is_on;
+    });
+    last_on_ = a_light->current_values.is_on();
+  }
+
+ protected:
+  bool last_on_;
+};
+
 template<typename... Ts> class AddressableSet : public Action<Ts...> {
  public:
   explicit AddressableSet(LightState *parent) : parent_(parent) {}

esphome/components/light/types.py

@@ -21,6 +21,10 @@ AddressableSet = light_ns.class_('AddressableSet', automation.Action)
 LightIsOnCondition = light_ns.class_('LightIsOnCondition', automation.Condition)
 LightIsOffCondition = light_ns.class_('LightIsOffCondition', automation.Condition)
 
+# Triggers
+LightTurnOnTrigger = light_ns.class_('LightTurnOnTrigger', automation.Trigger.template())
+LightTurnOffTrigger = light_ns.class_('LightTurnOffTrigger', automation.Trigger.template())
+
 # Effects
 LightEffect = light_ns.class_('LightEffect')
 RandomLightEffect = light_ns.class_('RandomLightEffect', LightEffect)

tests/test1.yaml

@@ -1044,6 +1044,14 @@ light:
               duration: 250ms
             - state: False
               duration: 250ms
+    on_turn_on:
+      - switch.template.publish:
+          id: livingroom_lights
+          state: yes
+    on_turn_off:
+      - switch.template.publish:
+          id: livingroom_lights
+          state: yes
   - platform: monochromatic
     name: "Kitchen Lights"
     id: kitchen