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Use QSaveFile in convertToCockatriceFormat() too

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convertToCockatriceFormat() had the same data-loss pattern: QFile WriteOnly
truncated the .cod, saveToFile_Native() always returns true, and the original
file was then removed unconditionally -- so a full disk during conversion wrote
a 0-byte .cod and then deleted the source deck.

Switch to QSaveFile (write + atomic commit), remove the original only after a
successful commit, and move the format check ahead of the file open so an
already-Cockatrice or unsupported deck never truncates or deletes anything.

Raised in review by ZeldaZach.
This commit is contained in:
Booyaka101 2026-06-08 09:26:46 +08:00
parent 6ff8783265
commit 28740c0675
1 changed files with 35 additions and 32 deletions
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67
cockatrice/src/interface/deck_loader/deck_loader.cpp
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@ -458,51 +458,54 @@ bool DeckLoader::convertToCockatriceFormat(LoadedDeck &deck)
return false;
}
// Determine the format before touching any file, so an already-converted or
// unsupported deck never truncates or deletes anything.
switch (DeckFileFormat::getFormatFromName(fileName)) {
case DeckFileFormat::PlainText:
break;
case DeckFileFormat::Cockatrice:
qCInfo(DeckLoaderLog) << "File is already in Cockatrice format. No conversion needed.";
return true;
default:
qCWarning(DeckLoaderLog) << "Unsupported file format for conversion:" << fileName;
return false;
}
// Change the file extension to .cod
QFileInfo fileInfo(fileName);
QString newFileName = QDir::toNativeSeparators(fileInfo.path() + "/" + fileInfo.completeBaseName() + ".cod");
// Open the new file for writing
QFile file(newFileName);
// Use QSaveFile so a failed write (e.g. a full disk) cannot leave a 0-byte .cod
// behind and then delete the original deck.
QSaveFile file(newFileName);
if (!file.open(QIODevice::WriteOnly | QIODevice::Text)) {
qCWarning(DeckLoaderLog) << "Failed to open file for writing:" << newFileName;
return false;
}
bool result = false;
// Perform file modifications based on the detected format
switch (DeckFileFormat::getFormatFromName(fileName)) {
case DeckFileFormat::PlainText:
// Save in Cockatrice's native format
result = deck.deckList.saveToFile_Native(&file);
break;
case DeckFileFormat::Cockatrice:
qCInfo(DeckLoaderLog) << "File is already in Cockatrice format. No conversion needed.";
result = true;
break;
default:
qCWarning(DeckLoaderLog) << "Unsupported file format for conversion:" << fileName;
result = false;
break;
if (!deck.deckList.saveToFile_Native(&file)) {
file.cancelWriting();
qCWarning(DeckLoaderLog) << "Failed to serialize deck for file:" << newFileName;
return false;
}
file.close();
// Delete the old file if conversion was successful
if (result) {
if (!QFile::remove(fileName)) {
qCWarning(DeckLoaderLog) << "Failed to delete original file:" << fileName;
} else {
qCInfo(DeckLoaderLog) << "Original file deleted successfully:" << fileName;
}
deck.lastLoadInfo = {
.fileName = newFileName,
.fileFormat = DeckFileFormat::Cockatrice,
};
if (!file.commit()) {
qCWarning(DeckLoaderLog) << "Failed to convert deck to " << newFileName << ":" << file.errorString();
return false;
}
return result;
// Conversion succeeded: delete the original file.
if (!QFile::remove(fileName)) {
qCWarning(DeckLoaderLog) << "Failed to delete original file:" << fileName;
} else {
qCInfo(DeckLoaderLog) << "Original file deleted successfully:" << fileName;
}
deck.lastLoadInfo = {
.fileName = newFileName,
.fileFormat = DeckFileFormat::Cockatrice,
};
return true;
}
void DeckLoader::printDeckListNode(QTextCursor *cursor, const InnerDecklistNode *node)