Add text component (#5336)

Co-authored-by: Maurits <maurits@vloop.nl>
Co-authored-by: mauritskorse <mauritskorse@gmail.com>
Co-authored-by: Daniel Dunn <dannydunn@eternityforest.com>
Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>

esphome/components/mqtt/mqtt_text.cpp

@@ -0,0 +1,63 @@
+#include "mqtt_text.h"
+#include "esphome/core/log.h"
+
+#include "mqtt_const.h"
+
+#ifdef USE_MQTT
+#ifdef USE_TEXT
+
+namespace esphome {
+namespace mqtt {
+
+static const char *const TAG = "mqtt.text";
+
+using namespace esphome::text;
+
+MQTTTextComponent::MQTTTextComponent(Text *text) : text_(text) {}
+
+void MQTTTextComponent::setup() {
+  this->subscribe(this->get_command_topic_(), [this](const std::string &topic, const std::string &state) {
+    auto call = this->text_->make_call();
+    call.set_value(state);
+    call.perform();
+  });
+
+  this->text_->add_on_state_callback([this](const std::string &state) { this->publish_state(state); });
+}
+
+void MQTTTextComponent::dump_config() {
+  ESP_LOGCONFIG(TAG, "MQTT text '%s':", this->text_->get_name().c_str());
+  LOG_MQTT_COMPONENT(true, false)
+}
+
+std::string MQTTTextComponent::component_type() const { return "text"; }
+const EntityBase *MQTTTextComponent::get_entity() const { return this->text_; }
+
+void MQTTTextComponent::send_discovery(JsonObject root, mqtt::SendDiscoveryConfig &config) {
+  switch (this->text_->traits.get_mode()) {
+    case TEXT_MODE_TEXT:
+      root[MQTT_MODE] = "text";
+      break;
+    case TEXT_MODE_PASSWORD:
+      root[MQTT_MODE] = "password";
+      break;
+  }
+
+  config.command_topic = true;
+}
+bool MQTTTextComponent::send_initial_state() {
+  if (this->text_->has_state()) {
+    return this->publish_state(this->text_->state);
+  } else {
+    return true;
+  }
+}
+bool MQTTTextComponent::publish_state(const std::string &value) {
+  return this->publish(this->get_state_topic_(), value);
+}
+
+}  // namespace mqtt
+}  // namespace esphome
+
+#endif
+#endif  // USE_MQTT