Pretty sure it works but kosync is down right now even on my other devices

src/activities/settings/KOReaderAuthActivity.cpp

@@ -0,0 +1,167 @@
+#include "KOReaderAuthActivity.h"
+
+#include <GfxRenderer.h>
+#include <WiFi.h>
+
+#include "KOReaderCredentialStore.h"
+#include "KOReaderSyncClient.h"
+#include "MappedInputManager.h"
+#include "activities/network/WifiSelectionActivity.h"
+#include "fontIds.h"
+
+void KOReaderAuthActivity::taskTrampoline(void* param) {
+  auto* self = static_cast<KOReaderAuthActivity*>(param);
+  self->displayTaskLoop();
+}
+
+void KOReaderAuthActivity::onWifiSelectionComplete(const bool success) {
+  exitActivity();
+
+  if (!success) {
+    xSemaphoreTake(renderingMutex, portMAX_DELAY);
+    state = FAILED;
+    errorMessage = "WiFi connection failed";
+    xSemaphoreGive(renderingMutex);
+    updateRequired = true;
+    return;
+  }
+
+  xSemaphoreTake(renderingMutex, portMAX_DELAY);
+  state = AUTHENTICATING;
+  statusMessage = "Authenticating...";
+  xSemaphoreGive(renderingMutex);
+  updateRequired = true;
+
+  performAuthentication();
+}
+
+void KOReaderAuthActivity::performAuthentication() {
+  const auto result = KOReaderSyncClient::authenticate();
+
+  xSemaphoreTake(renderingMutex, portMAX_DELAY);
+  if (result == KOReaderSyncClient::OK) {
+    state = SUCCESS;
+    statusMessage = "Successfully authenticated!";
+  } else {
+    state = FAILED;
+    errorMessage = KOReaderSyncClient::errorString(result);
+  }
+  xSemaphoreGive(renderingMutex);
+  updateRequired = true;
+}
+
+void KOReaderAuthActivity::onEnter() {
+  ActivityWithSubactivity::onEnter();
+
+  renderingMutex = xSemaphoreCreateMutex();
+
+  xTaskCreate(&KOReaderAuthActivity::taskTrampoline, "KOAuthTask",
+              4096,               // Stack size
+              this,               // Parameters
+              1,                  // Priority
+              &displayTaskHandle  // Task handle
+  );
+
+  // Turn on WiFi
+  WiFi.mode(WIFI_STA);
+
+  // Check if already connected
+  if (WiFi.status() == WL_CONNECTED) {
+    state = AUTHENTICATING;
+    statusMessage = "Authenticating...";
+    updateRequired = true;
+
+    // Perform authentication in a separate task
+    xTaskCreate(
+        [](void* param) {
+          auto* self = static_cast<KOReaderAuthActivity*>(param);
+          self->performAuthentication();
+          vTaskDelete(nullptr);
+        },
+        "AuthTask", 4096, this, 1, nullptr);
+    return;
+  }
+
+  // Launch WiFi selection
+  enterNewActivity(new WifiSelectionActivity(renderer, mappedInput,
+                                             [this](const bool connected) { onWifiSelectionComplete(connected); }));
+}
+
+void KOReaderAuthActivity::onExit() {
+  ActivityWithSubactivity::onExit();
+
+  // Turn off wifi
+  WiFi.disconnect(false);
+  delay(100);
+  WiFi.mode(WIFI_OFF);
+  delay(100);
+
+  xSemaphoreTake(renderingMutex, portMAX_DELAY);
+  if (displayTaskHandle) {
+    vTaskDelete(displayTaskHandle);
+    displayTaskHandle = nullptr;
+  }
+  vSemaphoreDelete(renderingMutex);
+  renderingMutex = nullptr;
+}
+
+void KOReaderAuthActivity::displayTaskLoop() {
+  while (true) {
+    if (updateRequired && !subActivity) {
+      updateRequired = false;
+      xSemaphoreTake(renderingMutex, portMAX_DELAY);
+      render();
+      xSemaphoreGive(renderingMutex);
+    }
+    vTaskDelay(10 / portTICK_PERIOD_MS);
+  }
+}
+
+void KOReaderAuthActivity::render() {
+  if (subActivity) {
+    return;
+  }
+
+  renderer.clearScreen();
+  renderer.drawCenteredText(UI_12_FONT_ID, 15, "KOReader Auth", true, EpdFontFamily::BOLD);
+
+  if (state == AUTHENTICATING) {
+    renderer.drawCenteredText(UI_10_FONT_ID, 300, statusMessage.c_str(), true, EpdFontFamily::BOLD);
+    renderer.displayBuffer();
+    return;
+  }
+
+  if (state == SUCCESS) {
+    renderer.drawCenteredText(UI_10_FONT_ID, 280, "Success!", true, EpdFontFamily::BOLD);
+    renderer.drawCenteredText(UI_10_FONT_ID, 320, "KOReader sync is ready to use");
+
+    const auto labels = mappedInput.mapLabels("Done", "", "", "");
+    renderer.drawButtonHints(UI_10_FONT_ID, labels.btn1, labels.btn2, labels.btn3, labels.btn4);
+    renderer.displayBuffer();
+    return;
+  }
+
+  if (state == FAILED) {
+    renderer.drawCenteredText(UI_10_FONT_ID, 280, "Authentication Failed", true, EpdFontFamily::BOLD);
+    renderer.drawCenteredText(UI_10_FONT_ID, 320, errorMessage.c_str());
+
+    const auto labels = mappedInput.mapLabels("Back", "", "", "");
+    renderer.drawButtonHints(UI_10_FONT_ID, labels.btn1, labels.btn2, labels.btn3, labels.btn4);
+    renderer.displayBuffer();
+    return;
+  }
+}
+
+void KOReaderAuthActivity::loop() {
+  if (subActivity) {
+    subActivity->loop();
+    return;
+  }
+
+  if (state == SUCCESS || state == FAILED) {
+    if (mappedInput.wasPressed(MappedInputManager::Button::Back) ||
+        mappedInput.wasPressed(MappedInputManager::Button::Confirm)) {
+      onComplete();
+    }
+  }
+}