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<?php
use SMW\Exception\DataItemException;
/**
* This class implements URI data items.
*
* @since 1.6
*
* @author Markus Krötzsch
* @ingroup SMWDataItems
*/
class SMWDIUri extends SMWDataItem {
/**
* URI scheme such as "html" or "mailto".
* @var string
*/
protected $m_scheme;
/**
* "Hierpart" of the URI (usually some authority and path).
* @var string
*/
protected $m_hierpart;
/**
* Query part of the URI.
* @var string
*/
protected $m_query;
/**
* Fragment part of the URI.
* @var string
*/
protected $m_fragment;
/**
* Initialise a URI by providing its scheme (e.g. "html"), 'hierpart'
* following "scheme:" (e.g. "//username@example.org/path), query (e.g.
* "q=Search+term", and fragment (e.g. "section-one"). The complete URI
* with these examples would be
* http://username@example.org/path?q=Search+term#section-one
* @param $scheme string for the scheme
* @param $hierpart string for the "hierpart"
* @param $query string for the query
* @param $fragment string for the fragment
*
* @todo Implement more validation here.
*/
public function __construct( $scheme, $hierpart, $query, $fragment, $strict = true ) {
if ( $strict && ( ( $scheme === '' ) || ( preg_match( '/[^a-zA-Z]/u', $scheme ) ) ) ) {
throw new DataItemException( "Illegal URI scheme \"$scheme\"." );
}
if ( $strict && $hierpart === '' ) {
throw new DataItemException( "Illegal URI hierpart \"$hierpart\"." );
}
$this->m_scheme = $scheme;
$this->m_hierpart = $hierpart;
$this->m_query = $query;
$this->m_fragment = $fragment;
}
public function getDIType() {
return SMWDataItem::TYPE_URI;
}
/// @todo This should be changed to the spelling getUri().
public function getURI() {
$schemesWithDoubleslesh = [
'http', 'https', 'ftp'
];
$uri = $this->m_scheme . ':'
. ( in_array( $this->m_scheme, $schemesWithDoubleslesh ) ? '//' : '' )
. $this->m_hierpart
. ( $this->m_query ? '?' . $this->m_query : '' )
. ( $this->m_fragment ? '#' . $this->m_fragment : '' );
// #1878
// https://tools.ietf.org/html/rfc3986
// Normalize spaces to use `_` instead of %20 and so ensure
// that http://example.org/Foo bar === http://example.org/Foo_bar === http://example.org/Foo%20bar
return str_replace( [ ' ', '%20'], '_', $uri );
}
public function getScheme() {
return $this->m_scheme;
}
public function getHierpart() {
return $this->m_hierpart;
}
public function getQuery() {
return $this->m_query;
}
public function getFragment() {
return $this->m_fragment;
}
/**
* @since 1.6
*
* @return string
*/
public function getSortKey() {
return urldecode( $this->getURI() );
}
public function getSerialization() {
return $this->getURI();
}
/**
* Create a data item from the provided serialization string and type
* ID.
* @return SMWDIUri
*/
public static function doUnserialize( $serialization ) {
// try to split "schema:rest"
$parts = explode( ':', $serialization, 2 );
$strict = true;
if ( $serialization !== null && count( $parts ) <= 1 ) {
throw new DataItemException( "Unserialization failed: the string \"$serialization\" is no valid URI." );
}
if ( $serialization === null ) {
$parts = [ '', 'NO_VALUE' ];
$strict = false;
}
$scheme = $parts[0];
// try to split "hier-part?queryfrag"
$parts = explode( '?', $parts[1], 2 );
if ( count( $parts ) == 2 ) {
$hierpart = $parts[0];
// try to split "query#frag"
$parts = explode( '#', $parts[1], 2 );
$query = $parts[0];
$fragment = ( count( $parts ) == 2 ) ? $parts[1] : '';
} else {
$query = '';
// try to split "hier-part#frag"
$parts = explode( '#', $parts[0], 2 );
$hierpart = $parts[0];
$fragment = ( count( $parts ) == 2 ) ? $parts[1] : '';
}
$hierpart = ltrim( $hierpart, '/' );
return new SMWDIUri( $scheme, $hierpart, $query, $fragment, $strict );
}
public function equals( SMWDataItem $di ) {
if ( $di->getDIType() !== SMWDataItem::TYPE_URI ) {
return false;
}
return $di->getURI() === $this->getURI();
}
}
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