filters = $filters;
}
public function __toString()
{
return $this->build();
}
/**
* Build XML for a set of filters.
*
* @return string
*/
private function build()
{
$prefix = "";
$suffix = '';
$xml = collect($this->filters)->map(function ($items) {
return $this->buildEntry($items);
})->implode(PHP_EOL);
return collect([$prefix, $xml, $suffix])->implode(PHP_EOL);
}
/**
* Build XML for an filter.
*
* @param Filter $filter
*
* @return string
*/
private function buildEntry(Filter $filter)
{
$entry = collect($filter->getProperties())->map(function ($value, $key) {
return $this->buildProperty($value, $key);
})->implode('');
return "{$entry}";
}
/**
* Build XML for a property.
*
* @param string $value
* @param string $key
*
* @return string
*/
private function buildProperty($value, $key)
{
if (collect(['from', 'to'])->contains($key)) {
$value = $this->implode($value);
}
return vsprintf("", [
$key,
htmlentities($this->implode($value)),
]);
}
/**
* Implode values with the appropriate prefix, suffix and separator.
*/
private function implode($value, $separator = '|')
{
if (is_string($value)) {
return $value;
}
if (is_array($value) && count($value) === 1) {
return reset($value);
}
return sprintf('(%s)', collect($value)->implode($separator));
}
}