registerNodeClass('DOMElement', 'WrMapDOMElement');
}
/// Creates and adds the element with the given tag name and returns it.
/// Additionally, it calls setAttribute($key, $value) for every entry
/// in $attributes.
function appendElement($tagName, $attributes=array()) {
$child = $this->appendChild($this->createElement($tagName));
foreach ($attributes as $key => $value) $child->setAttribute($key, $value);
return $child;
}
}
class WrMapDOMElement extends DOMElement {
/// Creates and adds the element with the given tag name and returns it
/// Additionally, it calls setAttribute($key, $value) for every entry
/// in $attributes.
function appendElement($tagName, $attributes=array()) {
$child = $this->appendChild($this->ownerDocument->createElement($tagName));
foreach ($attributes as $key => $value) $child->setAttribute($key, $value);
return $child;
}
/// Adds any UTF-8 string as content of the element - it will be escaped.
function appendText($text) {
return $this->appendChild($this->ownerDocument->createTextNode($text));
}
// Appends a CDATASections to the element. This can be used to include
// raw (unparsed) HTML to the DOM tree as it is necessary because
// $parser->recursiveTagParse does not always escape & characters.
// (see https://bugzilla.wikimedia.org/show_bug.cgi?id=55526 )
// Workaround: Use a CDATA section. When serializing with $doc->saveHTML,
// the is returned as ... .
// However, we end up having unescaped & in the output due to this bug in recursiveTagParse.
function appendCDATA($data) {
return $this->appendChild($this->ownerDocument->createCDATASection($data));
}
}
// WrBaseMap
// ---------
class WrBaseMap {
// gets coordinates and returns an array of lon/lat coordinate pairs, e.g.
// 47.12 N 11.87 E
// 47.13 N 11.70 E
// ->
// array(array(11.87, 47.12), array(11.70, 47.13))
public static function geo_to_coordinates($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 $result;
}
/// Takes a page title from the wiki and returns an image (if available)
/// or Null. For image wiki pages, the image is the corresponding image,
/// for inns it's the image of the "Gasthausbox".
public static function wikipage_to_image($title, $width) {
$file = false; // File class or false
// for NS_FILE titles, use the corresponding file as image
if ($title->getNamespace() == NS_FILE) {
$file = wfFindFile($title); // $file is a mediawiki File class or false
} else {
$categories = $title->getParentCategories(); // e.g. array('Kategorie:Rodelbahn' => 'Juifenalm')
global $wgContLang;
$key_sledrun = $wgContLang->getNSText(NS_CATEGORY) . ':Rodelbahn';
if (array_key_exists($key_sledrun, $categories)) {
// for sledrun titles use the image from the rodelbahnbox
// TODO
}
$key_inn = $wgContLang->getNSText(NS_CATEGORY) . ':Gasthaus';
if (array_key_exists($key_inn, $categories)) {
// for inn titles use the image from the gasthausbox
$dbr = wfGetDB(DB_SLAVE);
$res = $dbr->select('wrinncache', 'image', array('page_id' => $title->getArticleID()), __METHOD__);
$image = $dbr->fetchRow($res);
if ($image && !is_null($image['image'])) $file = wfFindFile($image['image']);
$dbr->freeResult($res);
}
}
if ($file === false) return Null;
if (!$file->canRender()) return Null;
$thumb_url = $file->createThumb($width, $width); // limit width and hight to $width
if (strlen($thumb_url) == 0) return Null;
return $thumb_url;
}
// convert sledruns to geojson (http://www.geojson.org/geojson-spec.html)
// Returns an array of features
public static 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['date_report'] = $sledrun['date_report'];
if (!is_null($sledrun['condition'])) $properties['condition'] = intval($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 $json_features;
}
// convert XML to geojson (http://www.geojson.org/geojson-spec.html)
// Returns an array of features
public static function xml_to_json_features($input) {
libxml_use_internal_errors(true); // without that, we get PHP Warnings if the $input is not well-formed
$xml = new SimpleXMLElement($input); // input
$whitespace = (string) $xml; // everything between and that's not a sub-element
if (strlen($whitespace) > 0 && !ctype_space($whitespace)) { // there must not be anythin except sub-elements or whitespace
throw new Exception('Die Landkarte enthält folgenden ungültigen Text: "' . trim($xml) . '".');
}
$json_features = array(); // output
$point_types = array('gasthaus', 'haltestelle', 'parkplatz', 'achtung', 'foto', '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 <' . $feature->getName() . '>. Erlaubt sind: <' . implode('>, <', array_merge($point_types, $line_types)) . '>.');
}
// point
if ($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();
$file_url = WrBaseMap::wikipage_to_image($title, 200);
if (!is_null($file_url)) $properties['thumb_url'] = $file_url;
}
$properties[$property] = $propval;
}
$coordinates = WrBaseMap::geo_to_coordinates($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;
}
$json_feature = array(
'type' => 'feature',
'geometry' => array(
'type' => 'LineString',
'coordinates' => WrBaseMap::geo_to_coordinates($feature)
),
'properties' => $properties
);
$json_features[] = $json_feature;
}
}
return $json_features;
}
/// Renders the tag and the tag.
/// The WrBaseMap class would be the only class needed but as the function render() does 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, WrBaseMap::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, WrBaseMap::xml_to_json_features('' . $content . ''));
} catch (Exception $e) {
$doc = new WrMapDOMDocument();
$doc->appendElement('div', array('class' => 'error'))->appendText('Fehler beim Parsen der Landkarte: ' . $e->getMessage());
return array($doc->saveHTML($doc->firstChild), 'markerType' => 'nowiki');
}
// 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;
$doc = new WrMapDOMDocument();
$div = $doc->appendElement('div', array('class' => 'wrmap', 'style' => 'border-style:none;', 'data-img-path' => "$wgExtensionAssetsPath/wrmap/openlayers/img/"));
// progress message
$div->appendElement('div', array())->appendText('Die Landkarte wird geladen...');
// data
$div->appendElement('div', array('style' => 'height: 0px; display:none;'))->appendText($json_string);
return array($doc->saveHTML($div), 'markerType' => 'nowiki');
}
}
// tag
class WrMap extends WrBaseMap {
}
// tag
class WrGMap extends WrBaseMap {
}
?>