Move ivrinput into openvr folder

Doesn't make sense for it to have it's own folder when there's an openvr
folder now.

src/openvr/ivrinput_action.h

@@ -0,0 +1,66 @@
+#pragma once
+#include <openvr.h>
+#include <easylogging++.h>
+
+namespace input
+{
+/*!
+The type of function that should be called to get data for the action.
+The IVRInput API does not give explicit warnings when the wrong functions are
+called. This enum is an attempt at runtime checking.
+*/
+enum class ActionType
+{
+    Undefined,
+    Digital,
+    Analog,
+};
+
+/*!
+Represents a single action from the actions manifest. Should be instantiated
+with a name similar to that of the one in the actions manifest.
+*/
+class Action
+{
+public:
+    Action( const char* const actionName, const ActionType type )
+        : m_name( actionName ), m_type( type )
+    {
+        auto error = vr::VRInput()->GetActionHandle( actionName, &m_handle );
+
+        if ( error != vr::EVRInputError::VRInputError_None )
+        {
+            LOG( ERROR ) << "Error getting handle for '" << actionName
+                         << "'. OpenVR Error: " << error;
+        }
+    }
+    /*!
+    An API internal handle that identifies an action.
+    */
+    vr::VRActionHandle_t handle() const noexcept
+    {
+        return m_handle;
+    }
+    /*!
+    The actions manfiest name of the action. Used for error reporting.
+    */
+    std::string name() const noexcept
+    {
+        return m_name;
+    }
+    /*!
+    The type of the action. Used for runtime checking that the wrong functions
+    aren't called.
+    */
+    ActionType type() const noexcept
+    {
+        return m_type;
+    }
+
+private:
+    vr::VRActionHandle_t m_handle = 0;
+    const std::string m_name;
+    const ActionType m_type = ActionType::Undefined;
+};
+
+} // namespace input