From 3359b00178357cb68d14e807c6deef3182532307 Mon Sep 17 00:00:00 2001
From: HampusM <hampus@hampusmat.com>
Date: Tue, 8 Mar 2022 16:40:27 +0100
Subject: refactor: make cursor controller track cursor pos itself

---
 src/engine/user/cursor.cpp | 54 ++++++++++++++++++++++++++++++++++------------
 src/engine/user/cursor.hpp | 13 +++++++----
 2 files changed, 49 insertions(+), 18 deletions(-)

diff --git a/src/engine/user/cursor.cpp b/src/engine/user/cursor.cpp
index 391a91a..39fef23 100644
--- a/src/engine/user/cursor.cpp
+++ b/src/engine/user/cursor.cpp
@@ -5,33 +5,46 @@
 #include <cstdlib>
 #include <iostream>
 
-void CursorController::move(const Vector2 &direction, const uint32_t &amount)
+CursorController::CursorController() : _position(_request_position()) {}
+
+void CursorController::move(const Vector2 &direction, const uint32_t &amount) noexcept
 {
 	auto format = direction_format_map.at(direction);
 
 	fmt::print(fmt::runtime(format.data()), fmt::arg("esc", ESC),
 			   fmt::arg("amount", amount));
 	std::cout.flush();
-}
 
-void CursorController::move_to(const Vector2 &pos)
-{
-	fmt::print(MOVE_CURSOR_TO, fmt::arg("esc", ESC), fmt::arg("row", pos.get_y()),
-			   fmt::arg("column", pos.get_x()));
-	std::cout.flush();
+	if (direction == Vector2::up())
+	{
+		_position.set_y(_position.get_y() + static_cast<int>(amount));
+	}
+	else if (direction == Vector2::down())
+	{
+		_position.set_y(_position.get_y() - static_cast<int>(amount));
+	}
+	else if (direction == Vector2::left())
+	{
+		_position.set_x(_position.get_x() - static_cast<int>(amount));
+	}
+	else if (direction == Vector2::right())
+	{
+		_position.set_x(_position.get_x() + static_cast<int>(amount));
+	}
 }
 
-Vector2 CursorController::where()
+void CursorController::move_to(const Vector2 &position) noexcept
 {
-	fmt::print(REQUEST_CURSOR_POSITION, fmt::arg("esc", ESC));
+	fmt::print(MOVE_CURSOR_TO, fmt::arg("esc", ESC), fmt::arg("row", position.get_y()),
+			   fmt::arg("column", position.get_x()));
 	std::cout.flush();
 
-	Vector2Options vector2_options = {};
-
-	// NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg)
-	scanf("\033[%u;%uR", &vector2_options.y, &vector2_options.x);
+	_position = position;
+}
 
-	return Vector2(vector2_options);
+Vector2 CursorController::where() const noexcept
+{
+	return _position;
 }
 
 void CursorController::hide()
@@ -45,3 +58,16 @@ void CursorController::show()
 	fmt::print(CURSOR_VISIBLE, fmt::arg("esc", ESC));
 	std::cout.flush();
 }
+
+Vector2 CursorController::_request_position() noexcept
+{
+	fmt::print(REQUEST_CURSOR_POSITION, fmt::arg("esc", ESC));
+	std::cout.flush();
+
+	Vector2Options vector2_options = {};
+
+	// NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg)
+	scanf("\033[%u;%uR", &vector2_options.y, &vector2_options.x);
+
+	return Vector2(vector2_options);
+}
diff --git a/src/engine/user/cursor.hpp b/src/engine/user/cursor.hpp
index 84117c1..50dd028 100644
--- a/src/engine/user/cursor.hpp
+++ b/src/engine/user/cursor.hpp
@@ -31,15 +31,20 @@ const std::unordered_map<Vector2, std::string_view, Vector2Hasher> direction_for
 class CursorController : public AutoWirable<CursorController, CursorController>
 {
 public:
-	CursorController() = default;
+	CursorController();
 
-	static void move(const Vector2 &direction, const uint32_t &amount);
+	void move(const Vector2 &direction, const uint32_t &amount) noexcept;
 
-	static void move_to(const Vector2 &pos);
+	void move_to(const Vector2 &position) noexcept;
 
 	static void hide();
 
 	static void show();
 
-	[[nodiscard]] static Vector2 where();
+	[[nodiscard]] Vector2 where() const noexcept;
+
+private:
+	Vector2 _position;
+
+	[[nodiscard]] static Vector2 _request_position() noexcept;
 };
-- 
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