Add copy integration (#3241)

esphome/components/copy/number/copy_number.cpp

@@ -0,0 +1,29 @@
+#include "copy_number.h"
+#include "esphome/core/log.h"
+
+namespace esphome {
+namespace copy {
+
+static const char *const TAG = "copy.number";
+
+void CopyNumber::setup() {
+  source_->add_on_state_callback([this](float value) { this->publish_state(value); });
+
+  traits.set_min_value(source_->traits.get_min_value());
+  traits.set_max_value(source_->traits.get_max_value());
+  traits.set_step(source_->traits.get_step());
+
+  if (source_->has_state())
+    this->publish_state(source_->state);
+}
+
+void CopyNumber::dump_config() { LOG_NUMBER("", "Copy Number", this); }
+
+void CopyNumber::control(float value) {
+  auto call2 = source_->make_call();
+  call2.set_value(value);
+  call2.perform();
+}
+
+}  // namespace copy
+}  // namespace esphome