/**
* method to create an instance from a string header value
*
* @param string $headerValue
* @return \stubbles\peer\http\AcceptHeader
*/
public static function parse(string $headerValue) : self
{
$self = new self();
foreach (explode(',', $headerValue) as $acceptable) {
// seems to be impossible to parse acceptables with regular
// expressions or even scanf(), so we do some string crunching here
if (strstr($acceptable, 'q=') !== false) {
list($acceptable, $priority) = explode('q=', trim($acceptable));
} else {
$priority = 1;
}
settype($priority, 'float');
$acceptable = trim($acceptable);
if (substr($acceptable, -1) === ';') {
$acceptable = substr($acceptable, 0, -1);
}
$self->addAcceptable($acceptable, $priority);
}
return $self;
}
