// array(array(11.87, 47.12), array(11.70, 47.13)) function geo_to_coordinates($input) { $matches = array(); $num_matches = preg_match_all('/\s*(\d+\.?\d*)\s*N?\s+(\d+\.?\d*)\s*E?\s*/', $input, $matches); $result = array(); for ($i=0; $i!=$num_matches; ++$i) { $result[] = array(floatval($matches[2][$i]), floatval($matches[1][$i])); } if (implode($matches[0]) != $input) throw new Exception('Falsches Koordinatenformat: ' . $input); return $result; } // convert sledruns to geojson (http://www.geojson.org/geojson-spec.html) // Returns an array of features function sledruns_to_json_features() { $json_features = array(); // result $dbr = wfGetDB(DB_SLAVE); $res = $dbr->select(array('wrsledruncache', 'wrreportcache'), array('wrsledruncache.page_title', 'position_latitude', 'position_longitude', 'date_report', '`condition`'), array('show_in_overview', 'not under_construction'), __METHOD__, array(), array('wrreportcache' => array('left outer join', 'wrsledruncache.page_id=wrreportcache.page_id'))); while ($sledrun = $dbr->fetchRow($res)) { $lat = $sledrun['position_latitude']; $lon = $sledrun['position_longitude']; if (is_null($lat) || is_null($lon)) continue; $lat = floatval($lat); $lon = floatval($lon); $title = Title::newFromText($sledrun['page_title']); $properties = array('type' => 'sledrun', 'name' => $title->getText(), 'wiki' => $title->getLocalUrl()); if (!is_null($sledrun['date_report'])) $properties[] = $sledrun['date_report']; if (!is_null($sledrun['condition'])) $properties[] = intval($sledrun['condition']); $json_feature = array( 'type' => 'feature', 'geometry' => array( 'type' => 'Point', 'coordinates' => array($lon, $lat) ), 'properties' => $properties ); $json_features[] = $json_feature; } $dbr->freeResult($res); return $json_features; } // convert XML to geojson (http://www.geojson.org/geojson-spec.html) // Returns an array of features function xml_to_json_features($input) { libxml_use_internal_errors(true); // without that, we get PHP Warnings if the $input is not well-formed $xml = new SimpleXMLElement($input); // input $json_features = array(); // output $point_types = array('gasthaus', 'haltestelle', 'parkplatz', 'achtung', 'punkt'); $line_types = array('rodelbahn', 'gehweg', 'alternative', 'lift', 'anfahrt', 'linie'); foreach ($xml as $feature) { $given_properties = array(); foreach ($feature->attributes() as $key => $value) $given_properties[] = $key; // determine feature type $is_point = in_array($feature->getName(), $point_types); $is_line = in_array($feature->getName(), $line_types); if (!$is_point && !$is_line) { throw new Exception('Unbekanntes Element <' . $feature->getName() . '>. Erlaubt sind: <' . implode('>, <', array_keys(array_merge($point_type, $line_type))) . '>.'); } // point if ($is_point) { $properties = array('type' => $feature->getName()); $allowed_properties = array('name', 'wiki'); $wrong_properties = array_diff($given_properties, $allowed_properties); if (count($wrong_properties) > 0) throw new Exception("Das Attribut '" . reset($wrong_properties) . "' ist nicht erlaubt bei <" . $feature->getName() . ">. Erlaubt sind: '" . implode("', '", $allowed_properties) . "'."); foreach ($given_properties as $property) { $propval = (string) $feature[$property]; if ($property == 'wiki') { $title = Title::newFromText($propval); $propval = $title->getLocalUrl(); } $properties[$property] = $propval; } $coordinates = geo_to_coordinates($feature); if (count($coordinates) != 1) throw new Exception('Das Element <' . $feature->getName() . '> muss genau ein Koordinatenpaar haben.'); $json_feature = array( 'type' => 'feature', 'geometry' => array( 'type' => 'Point', 'coordinates' => reset($coordinates) ), 'properties' => $properties ); $json_features[] = $json_feature; } // line if ($is_line) { $properties = array('type' => $feature->getName()); $allowed_properties = array('farbe', 'dicke'); $wrong_properties = array_diff($given_properties, $allowed_properties); if (count($wrong_properties) > 0) throw new Exception("Das Attribut '" . reset($wrong_properties) . "' ist nicht erlaubt bei <" . $feature->getName() . ">. Erlaubt sind: '" . implode("', '", $allowed_properties) . "'."); if (isset($feature['farbe'])) { $color = (string) $feature['farbe']; // e.g. #a200b7 if (preg_match('/^#[0-9a-f]{6}$/i', $color) != 1) throw new Exception('Die Farbangabe der Linie hat ein falsches Format. Sie muss z.B. so aussehen: #a200b7.'); $properties['strokeColor'] = $color; } if (isset($feature['dicke'])) { $stroke_width = (int) $feature['dicke']; // e.g. 6 if (((string) $stroke_width) !== (string) $feature['dicke']) throw new Exception('Die Angabe der Liniendicke hat ein falsches Format. Sie muss eine ganze Zahl wie z.B. 6 sein.'); $properties['strokeWidth'] = $stroke_width; } $json_feature = array( 'type' => 'feature', 'geometry' => array( 'type' => 'LineString', 'coordinates' => geo_to_coordinates($feature) ), 'properties' => $properties ); $json_features[] = $json_feature; } } return $json_features; } class WrBaseMap { /// Renders the tag and the tag. /// This class would be the only class needed but as the function render() toes not provide an argument /// telling which tag name called the function, a trick with two inherited classes has to be used. /// @param $content string - the content of the tag /// @param $args array - the array of attribute name/value pairs for the tag /// @param $parser Parser - the MW Parser object for the current page /// /// @return string - the html for rendering the map public static function render($content, $args, $parser, $frame) { // Unfortunately, $tagname is no argument of this function, therefore we have to use a trick with derived classes. $tagname = strtolower(get_called_class()); // either wrmap or wrgmap assert(in_array($tagname, array('wrmap', 'wrgmap'))); $parserOutput = $parser->getOutput(); $parserOutput->addHeadItem('', 'googlemaps'); $parserOutput->addModules('ext.wrmap'); // append all sledruns as icon $json_features = array(); $show_sledruns = ($tagname == 'wrgmap'); if ($show_sledruns) { $json_features = array_merge($json_features, sledruns_to_json_features()); } try { // map properties $properties = array(); if (isset($args['lat'])) $properties['lat'] = (float) $args['lat']; // latitude as float value if (isset($args['lon'])) $properties['lon'] = (float) $args['lon']; // longitude as float value if (isset($args['zoom'])) $properties['zoom'] = (int) $args['zoom']; // zoom as int value if (isset($args['width'])) $properties['width'] = (int) $args['width']; // width as int value if (isset($args['height'])) $properties['height'] = (int) $args['height']; // height as int value // append all elements in the XML $json_features = array_merge($json_features, xml_to_json_features('' . $content . '')); } catch (Exception $e) { return '
' . htmlspecialchars("Fehler beim Parsen der Landkarte: " . $e->getMessage()) . '
'; } // create final geojson $json = array( 'type' => 'FeatureCollection', 'features' => $json_features, 'properties' => $properties ); $json_string = json_encode($json); // Create
element where the map is placed in global $wgExtensionAssetsPath; $width_s = (isset($properties['width'])) ? (string) $properties['width'] . 'px' : '100%'; $height_s = (isset($properties['height']) ? (string) $properties['height'] : 450) . 'px'; $output = "
"; $output .= htmlspecialchars($json_string, ENT_NOQUOTES); $output .= "
\n"; return $output; } } // tag class WrMap extends WrBaseMap { } // tag class WrGMap extends WrBaseMap { } ?>