From 86c345922f02587d6c49e637535adf5494819652 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Sun, 20 Nov 2022 15:59:45 +0200
Subject: [PATCH] Add infrastructure for receiving player input

---
 source/gameview/application.h   |  5 ++-
 source/gameview/events.h        | 22 ++++++++++
 source/gameview/playerinput.cpp | 42 +++++++++++++++++++
 source/gameview/playerinput.h   | 74 +++++++++++++++++++++++++++++++++
 source/gameview/resources.cpp   | 11 +++++
 source/gameview/resources.h     | 16 +++++++
 6 files changed, 169 insertions(+), 1 deletion(-)
 create mode 100644 source/gameview/events.h
 create mode 100644 source/gameview/playerinput.cpp
 create mode 100644 source/gameview/playerinput.h
 create mode 100644 source/gameview/resources.cpp
 create mode 100644 source/gameview/resources.h

diff --git a/source/gameview/application.h b/source/gameview/application.h
index fbaa47b..5bbc95d 100644
--- a/source/gameview/application.h
+++ b/source/gameview/application.h
@@ -7,6 +7,7 @@
 #include <msp/gl/windowview.h>
 #include <msp/graphics/display.h>
 #include <msp/graphics/window.h>
+#include "playerinput.h"
 #include "presenter.h"
 
 namespace Msp::GameView {
@@ -25,6 +26,7 @@ protected:
 	Msp::Game::Director director;
 	GL::WindowView gl_view;
 	Presenter presenter;
+	PlayerInput player_input;
 
 public:
 	Application();
@@ -40,7 +42,8 @@ Application<T, R>::Application():
 	gl_device(window),
 	director(resources),
 	gl_view(window),
-	presenter(director, gl_view)
+	presenter(director, gl_view),
+	player_input(director, window)
 {
 	window.signal_close.connect(sigc::bind(sigc::mem_fun(this, &Application::exit), 0));
 }
diff --git a/source/gameview/events.h b/source/gameview/events.h
new file mode 100644
index 0000000..fcb6395
--- /dev/null
+++ b/source/gameview/events.h
@@ -0,0 +1,22 @@
+#ifndef MSP_GAMEVIEW_EVENTS_H_
+#define MSP_GAMEVIEW_EVENTS_H_
+
+#include <msp/input/controlscheme.h>
+
+namespace Msp::GameView {
+namespace Events {
+
+struct PlayerArrived
+{
+	Input::ControlScheme &controls;
+};
+
+struct PlayerDeparted
+{
+	Input::ControlScheme &controls;
+};
+
+} // namespace Events
+} // namespace Msp::GameView
+
+#endif
diff --git a/source/gameview/playerinput.cpp b/source/gameview/playerinput.cpp
new file mode 100644
index 0000000..5029ce5
--- /dev/null
+++ b/source/gameview/playerinput.cpp
@@ -0,0 +1,42 @@
+#include "playerinput.h"
+#include <msp/input/bindings.h>
+
+using namespace std;
+
+namespace Msp::GameView {
+
+PlayerInput::PlayerInput(Game::Director &director, Graphics::Window &wnd):
+	event_source(director.get_event_bus()),
+	keyboard(wnd),
+	mouse(wnd)
+{
+	kbm_hub.attach(keyboard);
+	kbm_hub.attach(mouse);
+
+	bindings = director.get_resources().get_all<Input::Bindings>();
+}
+
+void PlayerInput::init_players()
+{
+	add_player(kbm_hub);
+}
+
+void PlayerInput::add_player(Input::Device &dev)
+{
+	Player &player = players.emplace_back(&dev, scheme_factory());
+	for(Input::Bindings *b: bindings)
+		if(b->is_compatible(dev))
+		{
+			b->apply_to(*player.controls, dev);
+			break;
+		}
+	event_source.emit<Events::PlayerArrived>(ref(*player.controls));
+}
+
+void PlayerInput::synthesize_initial_events(Game::EventObserver &observer)
+{
+	for(const Player &p: players)
+		event_source.emit_to<Events::PlayerArrived>(observer, ref(*p.controls));
+}
+
+} // namespace Msp::GameView
diff --git a/source/gameview/playerinput.h b/source/gameview/playerinput.h
new file mode 100644
index 0000000..16f3c4e
--- /dev/null
+++ b/source/gameview/playerinput.h
@@ -0,0 +1,74 @@
+#ifndef MSP_GAMEVIEW_PLAYERINPUT_H_
+#define MSP_GAMEVIEW_PLAYERINPUT_H_
+
+#include <memory>
+#include <msp/input/bindings.h>
+#include <msp/input/controlscheme.h>
+#include <msp/input/hub.h>
+#include <msp/input/keyboard.h>
+#include <msp/input/mouse.h>
+#include <msp/game/director.h>
+#include "events.h"
+
+namespace Msp::GameView {
+
+class PlayerInput: public NonCopyable
+{
+public:
+	using EventSource = Game::EventSource<Events::PlayerArrived, Events::PlayerDeparted>;
+
+	enum Mode
+	{
+		ONE_LOCAL_PLAYER,
+		LOCAL_MULTIPLAYER
+	};
+
+private:
+	struct Player
+	{
+		Input::Device *device = nullptr;
+		std::unique_ptr<Input::ControlScheme> controls = nullptr;
+	};
+
+	using SchemeFactoryFunc = std::unique_ptr<Input::ControlScheme>();
+
+	EventSource event_source;
+	Input::Keyboard keyboard;
+	Input::Mouse mouse;
+	Input::Hub kbm_hub;
+	std::vector<Input::Bindings *> bindings;
+	SchemeFactoryFunc *scheme_factory = nullptr;
+	std::vector<Player> players;
+	Mode mode = ONE_LOCAL_PLAYER;
+
+public:
+	PlayerInput(Game::Director &, Graphics::Window &);
+
+	template<typename T>
+		requires std::is_base_of_v<Input::ControlScheme, T>
+	void set_control_scheme_type(Mode = ONE_LOCAL_PLAYER);
+
+private:
+	void init_players();
+	void add_player(Input::Device &);
+
+public:
+	void synthesize_initial_events(Game::EventObserver &);
+};
+
+
+template<typename T>
+	requires std::is_base_of_v<Input::ControlScheme, T>
+void PlayerInput::set_control_scheme_type(Mode m)
+{
+	if(scheme_factory)
+		throw std::logic_error("scheme type already set");
+
+	mode = m;
+	scheme_factory = +[]() -> std::unique_ptr<Input::ControlScheme> { return std::make_unique<T>(); };
+	init_players();
+}
+
+} // namespace Msp::GameView
+
+#endif
diff --git a/source/gameview/resources.cpp b/source/gameview/resources.cpp
new file mode 100644
index 0000000..99fbca0
--- /dev/null
+++ b/source/gameview/resources.cpp
@@ -0,0 +1,11 @@
+#include "resources.h"
+#include <msp/input/bindings.h>
+
+namespace Msp::GameView {
+
+Resources::Resources()
+{
+	add_type<Input::Bindings>().suffix(".binds");
+}
+
+} // namespace Msp::GameView
diff --git a/source/gameview/resources.h b/source/gameview/resources.h
new file mode 100644
index 0000000..aa20b02
--- /dev/null
+++ b/source/gameview/resources.h
@@ -0,0 +1,16 @@
+#ifndef MSP_GAMEVIEW_RESOURCES_H_
+#define MSP_GAMEVIEW_RESOURCES_H_
+
+#include <msp/gl/resources.h>
+
+namespace Msp::GameView {
+
+class Resources: public GL::Resources
+{
+public:
+	Resources();
+};
+
+} // namespace Msp::GameView
+
+#endif
-- 
2.43.0