Combine reader activities under ReaderActivity

src/CrossPointState.cpp

@@ -9,6 +9,8 @@
 constexpr uint8_t STATE_FILE_VERSION = 1;
 constexpr char STATE_FILE[] = "/sd/.crosspoint/state.bin";
 
+CrossPointState CrossPointState::instance;
+
 bool CrossPointState::saveToFile() const {
   std::ofstream outputFile(STATE_FILE);
   serialization::writePod(outputFile, STATE_FILE_VERSION);

src/CrossPointState.h

@@ -3,11 +3,20 @@
 #include <string>
 
 class CrossPointState {
+  // Static instance
+  static CrossPointState instance;
+
  public:
   std::string openEpubPath;
   ~CrossPointState() = default;
 
+  // Get singleton instance
+  static CrossPointState& getInstance() { return instance; }
+
   bool saveToFile() const;
 
   bool loadFromFile();
 };
+
+// Helper macro to access settings
+#define APP_STATE CrossPointState::getInstance()

src/activities/ActivityWithSubactivity.cpp

@@ -0,0 +1,21 @@
+#include "ActivityWithSubactivity.h"
+
+void ActivityWithSubactivity::exitActivity() {
+  if (subActivity) {
+    subActivity->onExit();
+    subActivity.reset();
+  }
+}
+
+void ActivityWithSubactivity::enterNewActivity(Activity* activity) {
+  subActivity.reset(activity);
+  subActivity->onEnter();
+}
+
+void ActivityWithSubactivity::loop() {
+  if (subActivity) {
+    subActivity->loop();
+  }
+}
+
+void ActivityWithSubactivity::onExit() { exitActivity(); }

src/activities/ActivityWithSubactivity.h

@@ -0,0 +1,17 @@
+#pragma once
+#include <memory>
+
+#include "Activity.h"
+
+class ActivityWithSubactivity : public Activity {
+ protected:
+  std::unique_ptr<Activity> subActivity = nullptr;
+  void exitActivity();
+  void enterNewActivity(Activity* activity);
+
+ public:
+  explicit ActivityWithSubactivity(GfxRenderer& renderer, InputManager& inputManager)
+      : Activity(renderer, inputManager) {}
+  void loop() override;
+  void onExit() override;
+};

src/activities/home/HomeActivity.cpp

@@ -45,7 +45,7 @@ void HomeActivity::loop() {
 
   if (inputManager.wasPressed(InputManager::BTN_CONFIRM)) {
     if (selectorIndex == 0) {
-      onFileSelectionOpen();
+      onReaderOpen();
     } else if (selectorIndex == 1) {
       onSettingsOpen();
     }

src/activities/home/HomeActivity.h

@@ -12,7 +12,7 @@ class HomeActivity final : public Activity {
   SemaphoreHandle_t renderingMutex = nullptr;
   int selectorIndex = 0;
   bool updateRequired = false;
-  const std::function<void()> onFileSelectionOpen;
+  const std::function<void()> onReaderOpen;
   const std::function<void()> onSettingsOpen;
 
   static constexpr int menuItemCount = 2;
@@ -22,9 +22,9 @@ class HomeActivity final : public Activity {
   void render() const;
 
  public:
-  explicit HomeActivity(GfxRenderer& renderer, InputManager& inputManager,
-                        const std::function<void()>& onFileSelectionOpen, const std::function<void()>& onSettingsOpen)
-      : Activity(renderer, inputManager), onFileSelectionOpen(onFileSelectionOpen), onSettingsOpen(onSettingsOpen) {}
+  explicit HomeActivity(GfxRenderer& renderer, InputManager& inputManager, const std::function<void()>& onReaderOpen,
+                        const std::function<void()>& onSettingsOpen)
+      : Activity(renderer, inputManager), onReaderOpen(onReaderOpen), onSettingsOpen(onSettingsOpen) {}
   void onEnter() override;
   void onExit() override;
   void loop() override;

src/activities/reader/ReaderActivity.cpp

@@ -0,0 +1,68 @@
+#include "ReaderActivity.h"
+
+#include <SD.h>
+
+#include "CrossPointState.h"
+#include "Epub.h"
+#include "EpubReaderActivity.h"
+#include "FileSelectionActivity.h"
+#include "activities/util/FullScreenMessageActivity.h"
+
+std::unique_ptr<Epub> ReaderActivity::loadEpub(const std::string& path) {
+  if (!SD.exists(path.c_str())) {
+    Serial.printf("[%lu] [   ] File does not exist: %s\n", millis(), path.c_str());
+    return nullptr;
+  }
+
+  auto epub = std::unique_ptr<Epub>(new Epub(path, "/.crosspoint"));
+  if (epub->load()) {
+    return epub;
+  }
+
+  Serial.printf("[%lu] [   ] Failed to load epub\n", millis());
+  return nullptr;
+}
+
+void ReaderActivity::onSelectEpubFile(const std::string& path) {
+  exitActivity();
+  enterNewActivity(new FullScreenMessageActivity(renderer, inputManager, "Loading..."));
+
+  auto epub = loadEpub(path);
+  if (epub) {
+    APP_STATE.openEpubPath = path;
+    APP_STATE.saveToFile();
+    onGoToEpubReader(std::move(epub));
+  } else {
+    exitActivity();
+    enterNewActivity(new FullScreenMessageActivity(renderer, inputManager, "Failed to load epub", REGULAR,
+                                                   EInkDisplay::HALF_REFRESH));
+    delay(2000);
+    onGoToFileSelection();
+  }
+}
+
+void ReaderActivity::onGoToFileSelection() {
+  exitActivity();
+  enterNewActivity(new FileSelectionActivity(
+      renderer, inputManager, [this](const std::string& path) { onSelectEpubFile(path); }, onGoBack));
+}
+
+void ReaderActivity::onGoToEpubReader(std::unique_ptr<Epub> epub) {
+  exitActivity();
+  enterNewActivity(new EpubReaderActivity(renderer, inputManager, std::move(epub), [this] { onGoToFileSelection(); }));
+}
+
+void ReaderActivity::onEnter() {
+  if (initialEpubPath.empty()) {
+    onGoToFileSelection();
+    return;
+  }
+
+  auto epub = loadEpub(initialEpubPath);
+  if (!epub) {
+    onGoBack();
+    return;
+  }
+
+  onGoToEpubReader(std::move(epub));
+}

src/activities/reader/ReaderActivity.h

@@ -0,0 +1,24 @@
+#pragma once
+#include <memory>
+
+#include "../ActivityWithSubactivity.h"
+
+class Epub;
+
+class ReaderActivity final : public ActivityWithSubactivity {
+  std::string initialEpubPath;
+  const std::function<void()> onGoBack;
+  static std::unique_ptr<Epub> loadEpub(const std::string& path);
+
+  void onSelectEpubFile(const std::string& path);
+  void onGoToFileSelection();
+  void onGoToEpubReader(std::unique_ptr<Epub> epub);
+
+ public:
+  explicit ReaderActivity(GfxRenderer& renderer, InputManager& inputManager, std::string initialEpubPath,
+                          const std::function<void()>& onGoBack)
+      : ActivityWithSubactivity(renderer, inputManager),
+        initialEpubPath(std::move(initialEpubPath)),
+        onGoBack(onGoBack) {}
+  void onEnter() override;
+};

src/main.cpp

@@ -19,8 +19,7 @@
 #include "activities/boot_sleep/BootActivity.h"
 #include "activities/boot_sleep/SleepActivity.h"
 #include "activities/home/HomeActivity.h"
-#include "activities/reader/EpubReaderActivity.h"
-#include "activities/reader/FileSelectionActivity.h"
+#include "activities/reader/ReaderActivity.h"
 #include "activities/settings/SettingsActivity.h"
 #include "activities/util/FullScreenMessageActivity.h"
 #include "config.h"
@@ -43,7 +42,6 @@ EInkDisplay einkDisplay(EPD_SCLK, EPD_MOSI, EPD_CS, EPD_DC, EPD_RST, EPD_BUSY);
 InputManager inputManager;
 GfxRenderer renderer(einkDisplay);
 Activity* currentActivity;
-CrossPointState appState;
 
 // Fonts
 EpdFont bookerlyFont(&bookerly_2b);
@@ -67,21 +65,6 @@ constexpr unsigned long POWER_BUTTON_SLEEP_MS = 500;
 // Auto-sleep timeout (10 minutes of inactivity)
 constexpr unsigned long AUTO_SLEEP_TIMEOUT_MS = 10 * 60 * 1000;
 
-std::unique_ptr<Epub> loadEpub(const std::string& path) {
-  if (!SD.exists(path.c_str())) {
-    Serial.printf("[%lu] [   ] File does not exist: %s\n", millis(), path.c_str());
-    return nullptr;
-  }
-
-  auto epub = std::unique_ptr<Epub>(new Epub(path, "/.crosspoint"));
-  if (epub->load()) {
-    return epub;
-  }
-
-  Serial.printf("[%lu] [   ] Failed to load epub\n", millis());
-  return nullptr;
-}
-
 void exitActivity() {
   if (currentActivity) {
     currentActivity->onExit();
@@ -151,30 +134,11 @@ void enterDeepSleep() {
 }
 
 void onGoHome();
-void onGoToFileSelection();
-void onSelectEpubFile(const std::string& path) {
+void onGoToReader(const std::string& initialEpubPath) {
   exitActivity();
-  enterNewActivity(new FullScreenMessageActivity(renderer, inputManager, "Loading..."));
-
-  auto epub = loadEpub(path);
-  if (epub) {
-    appState.openEpubPath = path;
-    appState.saveToFile();
-    exitActivity();
-    enterNewActivity(new EpubReaderActivity(renderer, inputManager, std::move(epub), onGoToFileSelection));
-  } else {
-    exitActivity();
-    enterNewActivity(new FullScreenMessageActivity(renderer, inputManager, "Failed to load epub", REGULAR,
-                                                   EInkDisplay::HALF_REFRESH));
-    delay(2000);
-    onGoToFileSelection();
-  }
-}
-
-void onGoToFileSelection() {
-  exitActivity();
-  enterNewActivity(new FileSelectionActivity(renderer, inputManager, onSelectEpubFile, onGoHome));
+  enterNewActivity(new ReaderActivity(renderer, inputManager, initialEpubPath, onGoHome));
 }
+void onGoToReaderHome() { onGoToReader(std::string()); }
 
 void onGoToSettings() {
   exitActivity();
@@ -183,7 +147,7 @@ void onGoToSettings() {
 
 void onGoHome() {
   exitActivity();
-  enterNewActivity(new HomeActivity(renderer, inputManager, onGoToFileSelection, onGoToSettings));
+  enterNewActivity(new HomeActivity(renderer, inputManager, onGoToReaderHome, onGoToSettings));
 }
 
 void setup() {
@@ -216,20 +180,13 @@ void setup() {
   SD.begin(SD_SPI_CS, SPI, SPI_FQ);
 
   SETTINGS.loadFromFile();
-  appState.loadFromFile();
-  if (!appState.openEpubPath.empty()) {
-    auto epub = loadEpub(appState.openEpubPath);
-    if (epub) {
-      exitActivity();
-      enterNewActivity(new EpubReaderActivity(renderer, inputManager, std::move(epub), onGoHome));
-      // Ensure we're not still holding the power button before leaving setup
-      waitForPowerRelease();
-      return;
-    }
+  APP_STATE.loadFromFile();
+  if (APP_STATE.openEpubPath.empty()) {
+    onGoHome();
+  } else {
+    onGoToReader(APP_STATE.openEpubPath);
   }
 
-  onGoHome();
-
   // Ensure we're not still holding the power button before leaving setup
   waitForPowerRelease();
 }