implemented Producer API and header, stub and tests. Builds cleanly, tests fail for now

src/core/Producer.cxx

@@ -0,0 +1,55 @@
+// Producer.cxx
+// SPDX-License-Identifier: GPL-3.0-only
+// Author: Unai Blazquez <unaibg2000@gmail.com>
+
+#include "Producer.hpp"
+
+#include "SysfsRead.hpp"
+
+Producer::Producer(const std::filesystem::path& sysfs_path,
+                   std::function<void(int)> send_fn, RandomFn random_fn
+    : m_reader(sysfs_path),
+      m_send(std::move(send_fn)),
+      m_random(std::move(random_fn)),
+      m_sleep(std::move(sleep_fn))
+{
+}
+void Producer::start()
+{
+  m_running.store(true);
+  m_thread = std::thread(&Producer::run_loop, this);
+}
+
+void Producer::stop()
+{
+  m_running.store(false);
+  if (m_thread.joinable())
+  {
+    m_thread.join();
+  }
+}
+void Producer::run_loop()
+{
+  auto status = m_reader.read_status();
+  switch (status)
+  {
+    case SysfsStatus::Enabled:
+      m_send(m_random());
+      break;
+
+    case SysfsStatus::Unreachable:
+      // do nothing for now
+      break;
+
+    case SysfsStatus::Empty:
+      break;
+
+    case SysfsStatus::ErrorTempTooHigh:
+      break;
+
+    case SysfsStatus::UnexpectedValue:
+      break;
+  }
+  m_sleep(delay);
+  // Thread will end here (for now) stop will join it
+}