Allow cancellation of download, dont block the device

src/network/OtaUpdater.h

@@ -3,6 +3,8 @@
 #include <functional>
 #include <string>
 
+#include "esp_https_ota.h"
+
 class OtaUpdater {
   bool updateAvailable = false;
   std::string latestVersion;
@@ -11,6 +13,8 @@ class OtaUpdater {
   size_t processedSize = 0;
   size_t totalSize = 0;
   bool render = false;
+  esp_https_ota_handle_t otaHandle = nullptr;
+  bool cancelRequested = false;
 
  public:
   enum OtaUpdaterError {
@@ -21,6 +25,8 @@ class OtaUpdater {
     UPDATE_OLDER_ERROR,
     INTERNAL_UPDATE_ERROR,
     OOM_ERROR,
+    UPDATE_CANCELLED,
+    UPDATE_IN_PROGRESS,
   };
 
   size_t getOtaSize() const { return otaSize; }
@@ -30,10 +36,17 @@ class OtaUpdater {
   size_t getTotalSize() const { return totalSize; }
 
   bool getRender() const { return render; }
+  void clearRender() { render = false; }
+
+  bool isUpdateInProgress() const { return otaHandle != nullptr; }
 
   OtaUpdater() = default;
   bool isUpdateNewer() const;
   const std::string& getLatestVersion() const;
   OtaUpdaterError checkForUpdate();
+  OtaUpdaterError beginInstallUpdate();
+  OtaUpdaterError performInstallUpdateStep();
+  void cancelUpdate();
+  void cleanupUpdate();
   OtaUpdaterError installUpdate();
 };