// 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_type = array('gasthaus' => 'inn', 'haltestelle' => 'busstop', 'parkplatz' => 'carpark', 'achtung' => 'attention', 'punkt' => 'point'); $line_type = array('rodelbahn' => 'sledrun', 'gehweg' => 'walk', 'alternative' => 'alternative', 'lift' => 'lift', 'linie' => 'line'); # TODO: anfahrt foreach ($xml as $feature) { $given_properties = array(); foreach ($feature->attributes() as $key => $value) $given_properties[] = $key; // determine feature type $is_point = in_array($feature->getName(), array_keys($point_type)); $is_line = in_array($feature->getName(), array_keys($line_type)); if (!$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' => $point_type[$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) { $properties[$property] = (string) $feature[$property]; } $coordinates = geo_to_coordinates($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' => $line_type[$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'])) $properties['strokeColor'] = (string) $feature['farbe']; // e.g. #a200b7 // TODO: Check if (isset($feature['dicke'])) $properties['strokeWidth'] = (int) $feature['dicke']; // e.g. 6 // TODO: Check $json_feature = array( 'type' => 'feature', 'geometry' => array( 'type' => 'LineString', 'coordinates' => geo_to_coordinates($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'))); // Get center and zoom level from $args // TODO: What happens if the values are no correct e.g. float? if (isset($args['lat'])) $latitude = floatval($args['lat']); else $latitude = 47.267648; // latitude as float value if (isset($args['lon'])) $longitude = floatval($args['lon']); else $longitude = 11.404655; // longitude as float value if (isset($args['zoom'])) $zoom = intval($args['zoom']); else $zoom = 10; // Google Zoom Level if (isset($args['width'])) $width = intval($args['width']); else $width = null; // null corresponds to 100% if (isset($args['height'])) $height = intval($args['height']); else $height = 450; $latitude_s = sprintf('%.6F', $latitude); $longitude_s = sprintf('%.6F', $longitude); $width_s = is_null($width) ? '100%' : $width . 'px'; $height_s = $height . 'px'; $show_sledruns = ($tagname == 'wrgmap'); $parserOutput = $parser->getOutput(); $parserOutput->addHeadItem('', 'googlemaps'); $parserOutput->addModules('ext.wrmap'); $json_features = array(); // append all sledruns as icon if ($show_sledruns) { $json_features = array_merge($json_features, sledruns_to_json_features()); } // append all elements in the XML try { $json_features = array_merge($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 ); $json_string = json_encode($json); // Create
element where the map is placed in global $wgExtensionAssetsPath; $output = "
"; $output .= ""; $output .= "
\n"; return $output; } } // tag class WrMap extends WrBaseMap { } // tag class WrGMap extends WrBaseMap { } ?>