/**
* @since 2.4
*
* @param DIProperty $property
*/
public function fetchConversionData(DIProperty $property)
{
$this->unitIds = array();
$this->unitFactors = array();
$this->mainUnit = false;
$this->prefixalUnitPreference = array();
$this->errors = array();
$factors = $this->cachedPropertyValuesPrefetcher->getPropertyValues($property->getDiWikiPage(), new DIProperty('_CONV'));
$this->numberValue->setContextPage($property->getDiWikiPage());
if ($factors === null || $factors === array()) {
// no custom type
return $this->errors[] = 'smw_nounitsdeclared';
}
$number = '';
$unit = '';
foreach ($factors as $di) {
// ignore corrupted data and bogus inputs
if (!$di instanceof DIBlob || $this->numberValue->parseNumberValue($di->getString(), $number, $unit, $asPrefix) != 0 || $number == 0) {
continue;
}
$this->matchUnitAliases($number, $asPrefix, preg_split('/\\s*,\\s*/u', $unit));
}
// No unit with factor 1? Make empty string the main unit.
if ($this->mainUnit === false) {
$this->mainUnit = '';
}
// Always add an extra empty unit; not as a synonym for the main unit
// but as a new unit with ID '' so if users do not give any unit, the
// conversion tooltip will still display the main unit for clarity
// (the empty unit is never displayed; we filter it when making
// conversion values)
$this->unitFactors = array('' => 1) + $this->unitFactors;
$this->unitIds[''] = '';
}
