std::vector<std::string> SimpleFileStore::versions(const std::string& name, bool inprogress/*=false*/) const
{
std::vector<std::string> versions;
FilePaths paths = filepath(name);
if ( File::exists(paths.current()) )
versions.push_back( lookupVersion(paths.current()).toString() );
if ( File::exists(paths.deleted()) )
versions.push_back( lookupVersion(paths.deleted(), true).toString() );
if ( inprogress && File::exists(paths.inprogress()) )
versions.push_back( lookupVersion(paths.inprogress()).toString() );
return versions;
}
bool SimpleFileStore::onDeleteComplete(const std::string& name, KeyMetadata& md)
{
FilePaths paths = filepath(name);
if ( !testIfVersionGreater(md.version, paths.current()) )
{
File::remove(paths.inprogress());
return false;
}
unsigned long long currentDigest = removeIfExists(paths.deleted(), true);
if ( !File::set_modified_time(paths.inprogress(), timeFromVersion(md.version)) || !File::rename(paths.inprogress(), paths.deleted()) )
{
File::remove(paths.inprogress());
return false;
}
md.digest ^= removeIfExists(paths.current());
md.digest ^= currentDigest;
return true;
}
bool SimpleFileStore::remove(const std::string& name)
{
FilePaths fps = filepath(name);
bool success = File::remove(fps.inprogress()) | File::remove(fps.deleted()) | File::remove(fps.current());
boost::filesystem::path path = fps.current();
path = path.parent_path();
while (File::remove(path.string()))
path = path.parent_path();
return success;
}
writestream SimpleFileStore::write(const std::string& name, const std::string& version, unsigned short, unsigned long long offset)
{
KeyMetadata md;
md.version.fromString(version);
if (md.version.empty())
md.version.increment("sec");
uint64_t current = timeFromVersion( mergedVersion(name, true) );
uint64_t prospective = timeFromVersion(md.version);
if ( prospective < current || (prospective == current && !md.version.isDeleted()) || md.version.isExpired(EXPIRY_TIMEOUT_SECONDS) )
return writestream();
// correct versions in the future back to now?
FilePaths paths = filepath(name);
string tempname(paths.inprogress());
boost::filesystem::create_directories(boost::filesystem::path(tempname).parent_path());
FileWriter* writer = new FileWriter(tempname);
return writestream(writer, md, std::bind(&SimpleFileStore::onWriteComplete, this, name, _1));
}