inputs: idle: implement an idletimer

src/inputs/Idle.cpp

@@ -0,0 +1,41 @@
+#include "Idle.h"
+#include "../Static.h"
+
+IdleTimer::IdleTimer()
+  : InputSource("IdleTimer"),
+    m_idleTime(60), m_secondsRemaining(0)
+{
+}
+
+InputEvent
+IdleTimer::read()
+{
+  EVERY_N_SECONDS(1) {
+    if (m_secondsRemaining > 0) {
+      m_secondsRemaining -= 1;
+      if (m_secondsRemaining == 0) {
+        return InputEvent::IdleStart;
+      }
+    }
+  }
+
+  return InputEvent::None;
+}
+
+void
+IdleTimer::handleEvent(const InputEvent& evt)
+{
+  switch(evt.intent) {
+    case InputEvent::IdleStart:
+      m_secondsRemaining = 0;
+      break;
+    case InputEvent::IdleStop:
+      m_secondsRemaining = m_idleTime;
+      break;
+    default:
+      break;
+  }
+}
+
+STATIC_ALLOC(IdleTimer);
+STATIC_TASK(IdleTimer);

src/inputs/Idle.h

@@ -0,0 +1,12 @@
+#pragma once
+#include <Figments.h>
+
+class IdleTimer : public InputSource {
+  public:
+    IdleTimer();
+    void handleEvent(const InputEvent& evt);
+    virtual InputEvent read() override;
+  private:
+    uint16_t m_idleTime;
+    uint16_t m_secondsRemaining;
+};