public function importSiPrefixes()
{
$path = $this->kernel->locateResource(self::SIPREFIX_PATH . self::SIPREFIX_DATA);
$yaml = new Parser();
$data = $yaml->parse(file_get_contents($path));
$count = 0;
$updated = 0;
foreach ($data as $prefixName => $prefixData) {
$prefix = $this->getSiPrefix($prefixName);
if ($prefix === null) {
$prefix = new SiPrefix();
$prefix->setPrefix($prefixName);
$this->entityManager->persist($prefix);
$count++;
}
$prefix->setExponent($prefixData['exponent']);
$prefix->setSymbol($prefixData['symbol']);
$prefix->setBase($prefixData['base']);
$updated++;
}
$this->entityManager->flush();
return ['updated' => $updated - $count, 'imported' => $count];
}