/**
* Create a sort key
*
* @return string
*/
public function getSortKey()
{
$key = strtoupper($this->letters);
if ($this->digits) {
if ($key) {
$key .= ' ';
}
$key .= strlen((int) $this->digits);
$key .= $this->digits;
}
$key .= $this->decimal;
if ($this->suffix) {
if ($key) {
$key .= ' ';
if (ctype_alpha($this->suffix[0])) {
$key .= '_';
}
}
$key .= MetadataUtils::createSortableString($this->suffix);
}
if ($this->cutter) {
foreach (preg_split('/[A-Za-z]\\d+/', $this->cutter) as $part) {
if ($key) {
$key .= ' ';
}
$key .= MetadataUtils::createSortableString($part);
}
}
return $key;
}
/**
* Tests for createSortableString
*
* @return void
*/
public function testCreateSortableString()
{
$this->assertEquals('A 3123', MetadataUtils::createSortableString('A 123'));
$this->assertEquals('A 3123 18 ABC', MetadataUtils::createSortableString('A 123 8 abc'));
$this->assertEquals('A 11 12', MetadataUtils::createSortableString('A 1 2'));
}