Incorporate koreader registration

src/activities/settings/KOReaderAuthActivity.h

@@ -5,27 +5,31 @@
 #include "activities/Activity.h"
 
 /**
- * Activity for testing KOReader credentials.
- * Connects to WiFi and authenticates with the KOReader sync server.
+ * Activity for authenticating or registering a KOReader sync account.
+ * Connects to WiFi, then either logs in or creates a new account on the server.
  */
 class KOReaderAuthActivity final : public Activity {
  public:
-  explicit KOReaderAuthActivity(GfxRenderer& renderer, MappedInputManager& mappedInput)
-      : Activity("KOReaderAuth", renderer, mappedInput) {}
+  enum class Mode { LOGIN, REGISTER };
+
+  explicit KOReaderAuthActivity(GfxRenderer& renderer, MappedInputManager& mappedInput, Mode mode = Mode::LOGIN)
+      : Activity("KOReaderAuth", renderer, mappedInput), mode(mode) {}
 
   void onEnter() override;
   void onExit() override;
   void loop() override;
   void render(RenderLock&&) override;
-  bool preventAutoSleep() override { return state == CONNECTING || state == AUTHENTICATING; }
+  bool preventAutoSleep() override { return state == CONNECTING || state == AUTHENTICATING || state == REGISTERING; }
 
  private:
-  enum State { WIFI_SELECTION, CONNECTING, AUTHENTICATING, SUCCESS, FAILED };
+  enum State { WIFI_SELECTION, CONNECTING, AUTHENTICATING, REGISTERING, SUCCESS, FAILED, USER_EXISTS };
 
+  Mode mode;
   State state = WIFI_SELECTION;
   std::string statusMessage;
   std::string errorMessage;
 
   void onWifiSelectionComplete(bool success);
   void performAuthentication();
+  void performRegistration();
 };