Event entity support (#6451)

Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>

esphome/core/application.h

@@ -63,6 +63,9 @@
 #ifdef USE_ALARM_CONTROL_PANEL
 #include "esphome/components/alarm_control_panel/alarm_control_panel.h"
 #endif
+#ifdef USE_EVENT
+#include "esphome/components/event/event.h"
+#endif
 
 namespace esphome {
 
@@ -164,6 +167,10 @@ class Application {
   }
 #endif
 
+#ifdef USE_EVENT
+  void register_event(event::Event *event) { this->events_.push_back(event); }
+#endif
+
   /// Register the component in this Application instance.
   template<class C> C *register_component(C *c) {
     static_assert(std::is_base_of<Component, C>::value, "Only Component subclasses can be registered");
@@ -386,6 +393,16 @@ class Application {
   }
 #endif
 
+#ifdef USE_EVENT
+  const std::vector<event::Event *> &get_events() { return this->events_; }
+  event::Event *get_event_by_key(uint32_t key, bool include_internal = false) {
+    for (auto *obj : this->events_)
+      if (obj->get_object_id_hash() == key && (include_internal || !obj->is_internal()))
+        return obj;
+    return nullptr;
+  }
+#endif
+
   Scheduler scheduler;
 
  protected:
@@ -409,6 +426,9 @@ class Application {
 #ifdef USE_BUTTON
   std::vector<button::Button *> buttons_{};
 #endif
+#ifdef USE_EVENT
+  std::vector<event::Event *> events_{};
+#endif
 #ifdef USE_SENSOR
   std::vector<sensor::Sensor *> sensors_{};
 #endif

esphome/core/component_iterator.cpp

@@ -321,6 +321,21 @@ void ComponentIterator::advance() {
         }
       }
       break;
+#endif
+#ifdef USE_EVENT
+    case IteratorState::EVENT:
+      if (this->at_ >= App.get_events().size()) {
+        advance_platform = true;
+      } else {
+        auto *event = App.get_events()[this->at_];
+        if (event->is_internal() && !this->include_internal_) {
+          success = true;
+          break;
+        } else {
+          success = this->on_event(event);
+        }
+      }
+      break;
 #endif
     case IteratorState::MAX:
       if (this->on_end()) {

esphome/core/component_iterator.h

@@ -80,6 +80,9 @@ class ComponentIterator {
 #endif
 #ifdef USE_ALARM_CONTROL_PANEL
   virtual bool on_alarm_control_panel(alarm_control_panel::AlarmControlPanel *a_alarm_control_panel) = 0;
+#endif
+#ifdef USE_EVENT
+  virtual bool on_event(event::Event *event) = 0;
 #endif
   virtual bool on_end();
 
@@ -146,6 +149,9 @@ class ComponentIterator {
 #endif
 #ifdef USE_ALARM_CONTROL_PANEL
     ALARM_CONTROL_PANEL,
+#endif
+#ifdef USE_EVENT
+    EVENT,
 #endif
     MAX,
   } state_{IteratorState::NONE};

esphome/core/controller.cpp

@@ -109,6 +109,12 @@ void Controller::setup_controller(bool include_internal) {
       obj->add_on_state_callback([this, obj]() { this->on_alarm_control_panel_update(obj); });
   }
 #endif
+#ifdef USE_EVENT
+  for (auto *obj : App.get_events()) {
+    if (include_internal || !obj->is_internal())
+      obj->add_on_event_callback([this, obj](const std::string &event_type) { this->on_event(obj, event_type); });
+  }
+#endif
 }
 
 }  // namespace esphome

esphome/core/controller.h

@@ -55,6 +55,9 @@
 #ifdef USE_ALARM_CONTROL_PANEL
 #include "esphome/components/alarm_control_panel/alarm_control_panel.h"
 #endif
+#ifdef USE_EVENT
+#include "esphome/components/event/event.h"
+#endif
 
 namespace esphome {
 
@@ -112,6 +115,9 @@ class Controller {
 #ifdef USE_ALARM_CONTROL_PANEL
   virtual void on_alarm_control_panel_update(alarm_control_panel::AlarmControlPanel *obj){};
 #endif
+#ifdef USE_EVENT
+  virtual void on_event(event::Event *obj, const std::string &event_type){};
+#endif
 };
 
 }  // namespace esphome

esphome/core/defines.h

@@ -24,6 +24,7 @@
 #define USE_CLIMATE
 #define USE_COVER
 #define USE_DEEP_SLEEP
+#define USE_EVENT
 #define USE_FAN
 #define USE_GRAPH
 #define USE_HOMEASSISTANT_TIME