Fixed progress bar

src/common/progress_callback.h

@@ -12,6 +12,8 @@ namespace Common {
 // (current_size, total_size)
 using ProgressCallback = std::function<void(u64, u64)>;
 
+// Note on using this: it is important to ensure that the progress callback is at least
+// invoked once. Typically a `callback(total, total)` at the end will work fine.
 class ProgressCallbackWrapper {
 public:
     // (total imported size, total size)

src/core/file_decryptor.cpp

@@ -171,6 +171,9 @@ void FileDecryptor::DataWriteLoop() {
         current_buffer = (current_buffer + 1) % buffers.size();
     }
 
+    if (imported_size == total_size) { // Completed
+        callback(total_size, total_size);
+    }
     completion_event.Set();
 }
 

src/core/importer.cpp

@@ -109,6 +109,7 @@ bool SDMCImporter::ImportContent(const ContentSpecifier& specifier,
         DeleteContent(specifier);
         return false;
     }
+    callback(specifier.maximum_size, specifier.maximum_size);
     return true;
 }