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Benutzer:Erik/Extension:Häfen in der Nähe: Unterschied zwischen den Versionen

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→ToDo: Testumgebungen spezifiziert.
→Installation: Neue Version kompatibel zu php 4
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Das folgende Script (NearbyPlacesExtension.php) muss im Extensions-Verzeichnis abgelegt und die Zeile <code>require_once("./extensions/NearbyPlacesExtension.php");</code> muss zu der LocalSettings.php hinzugefügt werden.
Das folgende Script (NearbyPlacesExtension.php) muss im Extensions-Verzeichnis abgelegt und die Zeile <code>require_once("./extensions/NearbyPlacesExtension.php");</code> muss zu der LocalSettings.php hinzugefügt werden.


  <?php  
  <?php
// HISTORY
// 2007-03-04 : Fix for PHP 4
//              Instead of DOM or DOM XML, the xml parser functions are used
// 2007-03-02 : Initial implemtation
// TODO
// - debug output
// - testing
// - lat and lon in degrees and minutes
// - improved retrival of places
// - error handling
// - config file
// - documentation
// - output data to be selected by attributes
   
   
  // register the extension
  // register the extension
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         'name' => 'Nearby Places',
         'name' => 'Nearby Places',
         'author' => 'Erik Hansen',
         'author' => 'Erik Hansen',
         'url' => 'http://www.skipperguide.de/wiki/Benutzer:Erik',
         'url' => 'http://www.skipperguide.de/wiki/Benutzer:Erik/Extension:H%C3%A4fen_in_der_N%C3%A4he',
         'description' => 'Shows a list of places near a given place',  
         'description' => 'Shows a list of places near a given place',
   
   
  );
  );
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  // initialize this extension
  // initialize this extension
  // register nearbyplaces as parser hook.
  // register nearbyplaces as parser hook.
  function wfNearbyPlacesExtension() {  
  function wfNearbyPlacesExtension() {
   
   
         global $wgParser;
         global $wgParser;
         $wgParser->setHook( "nearbyplaces", "npeShowNearbyPlaces" );  
         $wgParser->setHook( "nearbyplaces", "npeShowNearbyPlaces" );
   
   
  }
  }
Zeile 72: Zeile 87:
   
   
  }
  }
// XML Parser Class
class npeCParser {
var $places;
var $tag;
var $description;
var $placename;
var $coordinates;
var $parser;
// constructor
function npeCParser() {
$this->places = array();
$this->tag = "";
$this->description = "";
$this->placename = "";
$this->coordinates = "";
}
// initialize variables for every new placemark
// store the current tag for use within die characterData function
function startElement($parser, $name, $attrs) {
if ($name == "PLACEMARK") {
$this->description = "";
$this->placename = "";
$this->coordinates = "";
}
$this->tag = $name;
}
// store the data from the closed placemark
function endElement($parser, $name) {
if ($name == "PLACEMARK") {
$this->places[] = array ("name"        => trim($this->placename),
                        "description" => trim($this->description),
                        "coordinates" => trim($this->coordinates));
}
}
// store the data of the tags
function characterData($parser, $data) {
switch ($this->tag) {
case "NAME":
$this->placename .= $data;
break;
case "DESCRIPTION":
$this->description .= $data;
break;
case "COORDINATES":
$this->coordinates .= $data;
break;
}
}
// parse the xml data
function parse($xml) {
$this->parser = xml_parser_create();
xml_set_object($this->parser, $this);
xml_parser_set_option($this->parser, XML_OPTION_SKIP_WHITE, 1);
xml_set_element_handler($this->parser, "startElement", "endElement");
xml_set_character_data_handler($this->parser, "characterData");
xml_parse($this->parser, $xml);
xml_parser_free($this->parser);
return $this->places;
}
}
   
   
  // this function  
  // this function  
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  // create a new dom instance and load the kml file into it
  // create a new dom instance and load the kml file into it
  $xml = file_get_contents("http://www.skipperguide.de/extension/GoogleEarthExport.php");
  $xml = file_get_contents("http://www.skipperguide.de/extension/GoogleEarthExport.php");
  $dom = new DomDocument;
  $dom->loadXML($xml);
// create a new Parser and parse the retrieved kml file
  $parser = new npeCParser();
  $places = $parser->parse($xml);
   
   
  // pick all placemarks from the kml-File
  // pick all placemarks from the kml-File
  // In case none is found we are done already.
  // In case none is found we are done already.
  $places = $dom->getElementsByTagName('Placemark');
  if (count($places) == 0)
if ($places->length == 0)
  return ("Es wurden leider keine Häfen gefunden (0).");
  return ("Es wurden leider keine Häfen gefunden.");
   
   
  // parse through all palces from the kml file
  // parse through all palces from the kml file
  foreach ($places as $place) {
  foreach ($places as $place) {
   
   
list($lon, $lat) = sscanf($place["coordinates"], "%f,%f");
  // in case the difference in nm between the latitudes is  
  // in case the difference in nm between the latitudes is  
          // lager than the distance, we do not hat to proceed any
          // lager than the distance, we do not hat to proceed any
          // further with this place
          // further with this place
$lat = $place->getElementsByTagName('latitude')->item(0)->nodeValue;
  if (abs($lat - $req_lat) >> ($max_dist / 3600.0)) {
  if (abs($lat - $req_lat) >> ($max_dist / 3600.0)) {
  continue;
  continue;
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  // In case the distance is larger than max_dist,
  // In case the distance is larger than max_dist,
  // this place will be discarded.
  // this place will be discarded.
$lon = $place->getElementsByTagName('longitude')->item(0)->nodeValue;
  $b = $lat - $req_lat;
  $b = $lat - $req_lat;
  $l = $lon - $req_lon;
  $l = $lon - $req_lon;
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  // in case we have come that far, the place will be added
  // in case we have come that far, the place will be added
  // to the list of places within the requested range
  // to the list of places within the requested range
$description = $place->getElementsByTagName('description')->item(0)->nodeValue;
  list($link) = sscanf($place["description"], "http://www.skipperguide.de/wiki/%s");
$name = $place->getElementsByTagName('name')->item(0)->nodeValue;
$nearby_places[] = array ("lat" => $lat,
  list($link) = sscanf($description, "http://www.skipperguide.de/wiki/%s");
                          "lon" => $lon,
  $nearby_places[] = array ("lat" => $lat, "lon" => $lon, "dist" => $dist, "name" => $name, "link" => $link);  
                          "dist" => $dist,
                          "name" => $place["name"],
                          "link" => $link);
   
   
  }
  }
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  // check wether any places have been found.
  // check wether any places have been found.
  if (count($nearby_places) == 0)
  if (count($nearby_places) == 0)
  return ("Es wurden leider keine Häfen gefunden.");  
  return ("Es wurden leider keine Häfen gefunden (1).");
   
   
  // sort all places using npeCmpPlacesByDist for comparation
  // sort all places using npeCmpPlacesByDist for comparation
Abgerufen von „https://skipperguide.de/wiki/Benutzer:Erik/Extension:Häfen_in_der_Nähe“