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/text/text.h

@@ -0,0 +1,55 @@
+#pragma once
+
+#include "esphome/core/component.h"
+#include "esphome/core/entity_base.h"
+#include "esphome/core/helpers.h"
+#include "text_call.h"
+#include "text_traits.h"
+
+namespace esphome {
+namespace text {
+
+#define LOG_TEXT(prefix, type, obj) \
+  if ((obj) != nullptr) { \
+    ESP_LOGCONFIG(TAG, "%s%s '%s'", prefix, LOG_STR_LITERAL(type), (obj)->get_name().c_str()); \
+    if (!(obj)->get_icon().empty()) { \
+      ESP_LOGCONFIG(TAG, "%s  Icon: '%s'", prefix, (obj)->get_icon().c_str()); \
+    } \
+  }
+
+/** Base-class for all text inputs.
+ *
+ * A text input can use publish_state to send out a new value.
+ */
+class Text : public EntityBase {
+ public:
+  std::string state;
+  TextTraits traits;
+
+  void publish_state(const std::string &state);
+
+  /// Return whether this text input has gotten a full state yet.
+  bool has_state() const { return has_state_; }
+
+  /// Instantiate a TextCall object to modify this text component's state.
+  TextCall make_call() { return TextCall(this); }
+
+  void add_on_state_callback(std::function<void(std::string)> &&callback);
+
+ protected:
+  friend class TextCall;
+
+  /** Set the value of the text input, this is a virtual method that each text input integration must implement.
+   *
+   * This method is called by the TextCall.
+   *
+   * @param value The value as validated by the TextCall.
+   */
+  virtual void control(const std::string &value) = 0;
+
+  CallbackManager<void(std::string)> state_callback_;
+  bool has_state_{false};
+};
+
+}  // namespace text
+}  // namespace esphome