1 files changed, 15 insertions, 0 deletions
diff --git a/mmc_updater/src/UpdateObserver.h b/mmc_updater/src/UpdateObserver.h
new file mode 100644
index 00000000..84d47325
--- /dev/null
+++ b/mmc_updater/src/UpdateObserver.h
@@ -0,0 +1,15 @@
+#pragma once
+
+#include <string>
+
+/** Base class for observers of update installation status.
+  * See UpdateInstaller::setObserver()
+  */
+class UpdateObserver
+{
+	public:
+		virtual void updateError(const std::string& errorMessage) = 0;
+		virtual void updateProgress(int percentage) = 0;
+		virtual void updateFinished() = 0;
+};
+