added InputSystemComponent

needs testing

include/InputComponent.h

@@ -1,4 +1,5 @@
 #pragma once
+
 #include <SDL.h>
 #include <map>
 

include/InputSystemComponent.h

@@ -0,0 +1,28 @@
+#pragma once
+
+#include <map>
+#include <vector>
+#include <functional>
+
+#include "Component.h"
+#include "InputComponent.h"
+#include "InputAction.h"
+
+class InputSystemComponent : public InputComponent {
+public:
+    InputSystemComponent() = default;
+    ~InputSystemComponent() = default;
+
+    void init() override;
+    void update() override;
+
+    void bindAction(const std::string& actionName, Key key, std::function<void()> callback);
+    void unbindAction(const std::string& actionName, Key key);
+
+private:
+    InputComponent* m_inputComponent;
+    std::map<Key, std::vector<InputAction>> m_keyToActionsMap;
+    std::map<std::string, InputAction> m_actions;
+
+    void handleActions();
+};

src/InputComponent.cpp

@@ -10,8 +10,7 @@ InputComponent::~InputComponent() = default;
 
 void InputComponent::init()
 {
-    // m_keyStates = SDL_GetKeyboardState(NULL);
-    // InitKeyMappings();
+    // function intentionally left empty
 }
 
 void InputComponent::update()

src/InputSystemComponent.cpp

@@ -0,0 +1,54 @@
+#include "InputSystemComponent.h"
+
+void InputSystemComponent::init()
+{
+    InputComponent::init();
+}
+
+void InputSystemComponent::update()
+{
+    InputComponent::update();
+    handleActions();
+}
+
+void InputSystemComponent::bindAction(const std::string& actionName, Key key, std::function<void()> callback)
+{
+    if (m_actions.find(actionName) == m_actions.end())
+    {
+        m_actions[actionName] = InputAction(actionName, callback);
+    }
+
+    m_actions[actionName].keys.push_back(key);
+    m_keyToActionsMap[key].push_back(m_actions[actionName]);
+
+}
+
+void InputSystemComponent::unbindAction(const std::string& actionName, Key key)
+{
+    auto actionIt = m_actions.find(actionName);
+    if (actionIt != m_actions.end())
+    {
+        auto& action = actionIt->second;
+        action.keys.erase(std::remove(action.keys.begin(), action.keys.end(), key), action.keys.end());
+        m_keyToActionsMap[key].erase(std::remove_if(m_keyToActionsMap[key].begin(), m_keyToActionsMap[key].end(),
+            [&](const InputAction& a) { return a.name == actionName; }), m_keyToActionsMap[key].end());
+    }
+}
+
+void InputSystemComponent::handleActions()
+{
+    for (auto& keyActionsPair : m_keyToActionsMap)
+    {
+        Key key = keyActionsPair.first;
+        if (isKeyDown(key))
+        {
+            for (auto& action : keyActionsPair.second)
+            {
+                if (action.callback)
+                {
+                    action.callback();
+                }
+            }
+        }
+    }
+}