Add tinyfsm, start converting core functions to an FSM-based event loop

1 files changed, 54 insertions, 0 deletions

diff --git a/src/system_fsm/running.cpp b/src/system_fsm/running.cpp
new file mode 100644
index 00000000..e55989f1
--- /dev/null
+++ b/src/system_fsm/running.cpp
@@ -0,0 +1,54 @@
+
+#include "result.hpp"
+
+#include "audio_fsm.hpp"
+#include "event_queue.hpp"
+#include "storage.hpp"
+#include "system_events.hpp"
+#include "system_fsm.hpp"
+#include "ui_fsm.hpp"
+
+namespace system_fsm {
+namespace states {
+
+/*
+ * Ensure the storage and database are both available. If either of these fails
+ * to open, then we assume it's an issue with the underlying SD card.
+ */
+void Running::entry() {
+  auto storage_res = drivers::SdStorage::Create(sGpioExpander.get());
+  if (storage_res.has_error()) {
+    events::Dispatch<StorageError, SystemState, audio::AudioState, ui::UiState>(
+        StorageError());
+    return;
+  }
+  sStorage.reset(storage_res.value());
+
+  auto database_res = database::Database::Open();
+  if (database_res.has_error()) {
+    events::Dispatch<StorageError, SystemState, audio::AudioState, ui::UiState>(
+        StorageError());
+    return;
+  }
+  sDatabase.reset(database_res.value());
+
+  events::Dispatch<StorageMounted, SystemState, audio::AudioState, ui::UiState>(
+      StorageMounted());
+}
+
+void Running::exit() {
+  sDatabase.reset();
+  sStorage.reset();
+}
+
+void Running::react(const StorageUnmountRequested& ev) {
+  events::Dispatch<internal::ReadyToUnmount, SystemState>(
+      internal::ReadyToUnmount());
+}
+
+void Running::react(const internal::ReadyToUnmount& ev) {
+  transit<Unmounted>();
+}
+
+}  // namespace states
+}  // namespace system_fsm