/**
* Given a unit of measure, determine if its name or any of its aliases conflict
* with the set of already-known unit names and aliases.
*
* @param UnitOfMeasureInterface $unit The unit in question
*
* @return boolean true if there is a conflict, false if there is not
*/
protected static function unitNameOrAliasesAlreadyRegistered(UnitOfMeasureInterface $unit)
{
// If this class hasn't been initialized yet, do so now
if (!is_array(static::$unitDefinitions)) {
static::$unitDefinitions = [];
static::initialize();
}
$currentUnitNamesAndAliases = [];
foreach (static::$unitDefinitions as $unitOfMeasure) {
$currentUnitNamesAndAliases[] = $unitOfMeasure->getName();
$currentUnitNamesAndAliases = array_merge($currentUnitNamesAndAliases, $unitOfMeasure->getAliases());
}
$newUnitNamesAndAliases = array_merge([$unit->getName()], $unit->getAliases());
return count(array_intersect($currentUnitNamesAndAliases, $newUnitNamesAndAliases)) > 0;
}
