Add Number entities (from Home Assistant) (#1971)

Co-authored-by: Oxan van Leeuwen <oxan@oxanvanleeuwen.nl>

esphome/components/number/automation.cpp

@@ -0,0 +1,47 @@
+#include "automation.h"
+#include "esphome/core/log.h"
+
+namespace esphome {
+namespace number {
+
+static const char *const TAG = "number.automation";
+
+void ValueRangeTrigger::setup() {
+  this->rtc_ = global_preferences.make_preference<bool>(this->parent_->get_object_id_hash());
+  bool initial_state;
+  if (this->rtc_.load(&initial_state)) {
+    this->previous_in_range_ = initial_state;
+  }
+
+  this->parent_->add_on_state_callback([this](float state) { this->on_state_(state); });
+}
+float ValueRangeTrigger::get_setup_priority() const { return setup_priority::HARDWARE; }
+
+void ValueRangeTrigger::on_state_(float state) {
+  if (isnan(state))
+    return;
+
+  float local_min = this->min_.value(state);
+  float local_max = this->max_.value(state);
+
+  bool in_range;
+  if (isnan(local_min) && isnan(local_max)) {
+    in_range = this->previous_in_range_;
+  } else if (isnan(local_min)) {
+    in_range = state <= local_max;
+  } else if (isnan(local_max)) {
+    in_range = state >= local_min;
+  } else {
+    in_range = local_min <= state && state <= local_max;
+  }
+
+  if (in_range != this->previous_in_range_ && in_range) {
+    this->trigger(state);
+  }
+
+  this->previous_in_range_ = in_range;
+  this->rtc_.save(&in_range);
+}
+
+}  // namespace number
+}  // namespace esphome