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<?php |
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declare( strict_types = 1 ); |
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namespace Maps\SemanticMW; |
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use DataValues\Geo\Parsers\LatLongParser; |
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use DataValues\Geo\Values\LatLongValue; |
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use InvalidArgumentException; |
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use Maps\MapsFactory; |
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use Maps\Presentation\MapsDistanceParser; |
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use SMW\Query\Language\Description; |
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use SMW\Query\Language\ThingDescription; |
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use SMW\Query\QueryComparator; |
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use SMWDataItem; |
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use SMWDataValue; |
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use SMWDIGeoCoord; |
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use SMWOutputs; |
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use ValueParsers\ParseException; |
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/** |
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* @property SMWDIGeoCoord m_dataitem |
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* |
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* @licence GNU GPL v2+ |
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* @author Jeroen De Dauw < [email protected] > |
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* @author Markus Krötzsch |
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*/ |
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class CoordinateValue extends SMWDataValue { |
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private $wikiValue; |
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/** |
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* Overwrite SMWDataValue::getQueryDescription() to be able to process |
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* comparators between all values. |
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* |
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* @param string $value |
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* |
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* @return Description |
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* @throws InvalidArgumentException |
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*/ |
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public function getQueryDescription( $value ) { |
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if ( !is_string( $value ) ) { |
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throw new InvalidArgumentException( '$value needs to be a string' ); |
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} |
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[ $distance, $comparator ] = $this->parseUserValue( $value ); |
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$distance = $this->parserDistance( $distance ); |
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$this->setUserValue( $value ); |
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switch ( true ) { |
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case !$this->isValid(): |
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return new ThingDescription(); |
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case $distance !== false: |
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return new AreaDescription( |
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$this->getDataItem(), |
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$comparator, |
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$distance |
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); |
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default: |
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return new CoordinateDescription( |
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$this->getDataItem(), |
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null, |
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$comparator |
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); |
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} |
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} |
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/** |
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* @see SMWDataValue::parseUserValue |
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*/ |
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protected function parseUserValue( $value ) { |
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if ( !is_string( $value ) ) { |
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throw new InvalidArgumentException( '$value needs to be a string' ); |
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} |
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$this->wikiValue = $value; |
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$comparator = SMW_CMP_EQ; |
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$distance = false; |
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if ( $value === '' ) { |
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$this->addError( wfMessage( 'smw_novalues' )->text() ); |
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} else { |
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$comparator = QueryComparator::getInstance()->extractComparatorFromString( $value ); |
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[ $coordinates, $distance ] = $this->findValueParts( $value ); |
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$this->tryParseAndSetDataItem( $coordinates ); |
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} |
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return [ $distance, $comparator ]; |
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} |
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private function findValueParts( string $value ): array { |
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$parts = explode( '(', $value ); |
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$coordinates = trim( array_shift( $parts ) ); |
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$distance = count( $parts ) > 0 ? trim( array_shift( $parts ) ) : false; |
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return [ $coordinates, $distance ]; |
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} |
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private function tryParseAndSetDataItem( string $coordinates ) { |
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$parser = new LatLongParser(); |
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try { |
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$value = $parser->parse( $coordinates ); |
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$this->m_dataitem = new SMWDIGeoCoord( $value->getLatitude(), $value->getLongitude() ); |
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} |
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catch ( ParseException $parseException ) { |
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$this->addError( wfMessage( 'maps_unrecognized_coords', $coordinates, 1 )->text() ); |
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// Make sure this is always set |
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// TODO: Why is this needed?! |
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$this->m_dataitem = new SMWDIGeoCoord( [ 'lat' => 0, 'lon' => 0 ] ); |
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} |
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} |
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private function parserDistance( $distance ) { |
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if ( $distance !== false ) { |
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$distance = substr( trim( $distance ), 0, -1 ); |
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if ( !MapsDistanceParser::isDistance( $distance ) ) { |
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$this->addError( wfMessage( 'semanticmaps-unrecognizeddistance', $distance )->text() ); |
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$distance = false; |
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} |
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} |
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return $distance; |
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} |
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/** |
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* @see SMWDataValue::getShortHTMLText |
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* |
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* @since 0.6 |
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*/ |
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public function getShortHTMLText( $linker = null ) { |
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return $this->getShortWikiText( $linker ); |
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} |
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/** |
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* @see SMWDataValue::getShortWikiText |
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*/ |
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public function getShortWikiText( $linked = null ) { |
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if ( $this->isValid() ) { |
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if ( $this->m_caption === false ) { |
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return $this->getFormattedCoord( $this->m_dataitem ); |
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} |
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return $this->m_caption; |
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} |
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return $this->getErrorText(); |
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} |
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/** |
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* @param SMWDIGeoCoord $dataItem |
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* @param string|null $format |
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* |
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* @return string|null |
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*/ |
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private function getFormattedCoord( SMWDIGeoCoord $dataItem, string $format = null ) { |
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return MapsFactory::globalInstance()->getCoordinateFormatter()->format( |
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new LatLongValue( |
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$dataItem->getLatitude(), |
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$dataItem->getLongitude() |
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), |
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$format ?? $GLOBALS['smgQPCoodFormat'], |
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$GLOBALS['smgQPCoodDirectional'] |
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); |
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} |
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/** |
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* @see SMWDataValue::getLongHTMLText |
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*/ |
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public function getLongHTMLText( $linker = null ) { |
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return $this->getLongWikiText( $linker ); |
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} |
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/** |
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* @see SMWDataValue::getLongWikiText |
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* |
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* @since 0.6 |
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*/ |
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public function getLongWikiText( $linked = null ) { |
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if ( $this->isValid() ) { |
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SMWOutputs::requireHeadItem( SMW_HEADER_TOOLTIP ); |
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// TODO: fix lang keys so they include the space and coordinates. |
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$coordinateSet = $this->m_dataitem->getCoordinateSet(); |
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$text = $this->getFormattedCoord( $this->m_dataitem ); |
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$lines = [ |
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wfMessage( 'semanticmaps-latitude', $coordinateSet['lat'] )->inContentLanguage()->escaped(), |
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wfMessage( 'semanticmaps-longitude', $coordinateSet['lon'] )->inContentLanguage()->escaped(), |
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]; |
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if ( array_key_exists( 'alt', $coordinateSet ) ) { |
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$lines[] = wfMessage( 'semanticmaps-altitude', $coordinateSet['alt'] )->inContentLanguage()->escaped(); |
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} |
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return '<span class="smwttinline">' . htmlspecialchars( $text ) . '<span class="smwttcontent">' . |
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implode( '<br />', $lines ) . |
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'</span></span>'; |
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} else { |
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return $this->getErrorText(); |
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} |
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} |
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/** |
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* @see SMWDataValue::getWikiValue |
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*/ |
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public function getWikiValue() { |
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return $this->wikiValue; |
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} |
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/** |
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* @see SMWDataValue::setDataItem |
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* |
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* @param SMWDataItem $dataItem |
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* |
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* @return boolean |
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*/ |
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protected function loadDataItem( SMWDataItem $dataItem ) { |
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if ( $dataItem instanceof SMWDIGeoCoord ) { |
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$formattedValue = $this->getFormattedCoord( $dataItem ); |
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if ( $formattedValue !== null ) { |
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$this->wikiValue = $formattedValue; |
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$this->m_dataitem = $dataItem; |
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return true; |
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} |
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} |
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return false; |
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} |
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/** |
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* Create links to mapping services based on a wiki-editable message. The parameters |
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* available to the message are: |
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* |
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* $1: The location in non-directional float notation. |
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* $2: The location in directional DMS notation. |
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* $3: The latitude in non-directional float notation. |
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* $4 The longitude in non-directional float notation. |
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* |
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* @return array |
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*/ |
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protected function getServiceLinkParams() { |
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$coordinateSet = $this->m_dataitem->getCoordinateSet(); |
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return [ |
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$this->getFormattedCoord( $this->m_dataitem, 'float' ), // TODO |
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$this->getFormattedCoord( $this->m_dataitem, 'dms' ), // TODO |
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$coordinateSet['lat'], |
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$coordinateSet['lon'] |
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]; |
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} |
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/** |
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* @return SMWDIGeoCoord|\SMWDIError |
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*/ |
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public function getDataItem() { |
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return parent::getDataItem(); |
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} |
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} |
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This error can happen if you refactor code and forget to move the variable initialization.
Let’s take a look at a simple example:
The above code is perfectly fine. Now imagine that we re-order the statements:
In that case,
$x
would be read before it is initialized. This was a very basic example, however the principle is the same for the found issue.