JsonParserUtility::extractValue ensure to not return garbage value

[herve-er]

Before this PR, if the key was not found or was found but empty, the JsonParserUtility::extractValue method would return true and leave the val variable unchanged.

This behavior caused issues in the following scenario:

if (!JsonParserUtility::extractValue(actionObj, fileTypeKey, tmpStr)) {
    return ExitCode::BackError;
}
actionInfo.snapshotItem.setType(tmpStr == fileKey ? NodeType::File : NodeType::Directory);

if (!JsonParserUtility::extractValue(actionObj, symbolicLinkKey, tmpStr, false)) {
    return ExitCode::BackError;
}
actionInfo.snapshotItem.setIsLink(!tmpStr.empty());

If symbolicLinkKey was not found, tmpStr would retain the value of fileTypeKey, mistakenly treating the item as a link by assuming the link URL was not empty.

This PR modifies extractValue to clear the val variable when the key is not found, preventing this unintended behavior.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud