Fixed: Now name of points gets added to the GeoJSON properties.
[philipp/winterrodeln/mediawiki_extensions/wrmap.git] / wrmap.body.php
index e71b1eacaf81d8ba34c97565e0d714546339733c..b6bd40b29b5c585b45b16f93057b484bbbe0dc6c 100644 (file)
 <?php
 
-class WrMap {
-       /// Renders the <wrgmap> tag
+// get value of key or default value if key does not exist
+// 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))
+function geo_to_coordinates($input) {
+       $matches = array();
+       $num_matches = preg_match_all('/(\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]));
+       }
+       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 $json_features;
+}
+
+
+// convert XML to geojson (http://www.geojson.org/geojson-spec.html)
+// Returns an array of features
+// TODO: Error reporting
+function xml_to_json_features($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');
+       $line_type = array('rodelbahn' => 'sledrun', 'gehweg' => 'walk', 'alternative' => 'alternative', 'lift' => 'lift', 'linie' => 'line');
+       foreach ($xml as $feature) {
+               // point
+               if (in_array($feature->getName(), array_keys($point_type))) {
+                       $properties = array('type' => $point_type[$feature->getName()]);
+                       if (isset($feature['wiki'])) $properties['wiki'] = (string) $feature['wiki'];
+                       if (isset($feature['name'])) $properties['name'] = (string) $feature['name'];
+                       $json_feature = array(
+                               'type' => 'feature',
+                               'geometry' => array(
+                                       'type' => 'Point',
+                                       'coordinates' => geo_to_coordinates($feature)[0]
+                               ),
+                               'properties' => $properties
+                       );
+                       $json_features[] = $json_feature;
+               }
+               // line
+               if (in_array($feature->getName(), array_keys($line_type))) {
+                       $properties = array('type' => $line_type[$feature->getName()]);
+                       if (isset($feature['farbe'])) $properties['strokeColor'] = (string) $feature['farbe'];
+                       if (isset($feature['dicke'])) $properties['strokeWidth'] = (string) $feature['dicke'];
+                       $json_feature = array(
+                               'type' => 'feature',
+                               'geometry' => array(
+                                       'type' => 'LineString',
+                                       'coordinates' => geo_to_coordinates($feature)
+                               ),
+                               'properties' => $properties
+                       );
+                       $json_features[] = $json_feature;
+               }
+       }
+       return $json_features;
+}
+
+
+
+class WrBaseMap {
+       /// Renders the <wrgmap> tag and the <wrmap> 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 <wrgmap> 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 $args
                if (isset($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');
 
-               // Query database
-               $dbr = wfGetDB(DB_SLAVE);
-               $res = $dbr->select('wrsledruncache', array('page_title', 'position_latitude', 'position_longitude'), array('show_in_overview', 'not under_construction'));
-               $sledruns = array();
-               while ($sledrun = $dbr->fetchRow($res)) $sledruns[] = $sledrun;
-               $dbr->freeResult($res);
-               
                $parserOutput = $parser->getOutput();
                $parserOutput->addHeadItem('<script type="text/javascript" src="http://maps.google.com/maps/api/js?v=3.8&amp;sensor=false"></script>', 'googlemaps');
                $parserOutput->addModules('ext.wrmap');
                
-               // Create <div/> element where the map is placed in
-               $output = "<div class=\"wrmap\" style=\"width: 100%; height: 450px; border-style:none;\" data-center-lon=\"$longitude_s\" data-center-lat=\"$latitude_s\" data-zoom=\"$zoom\">\n";
-               foreach ($sledruns as $sledrun) {
-                       $lat = $sledrun['position_latitude'];
-                       $lon = $sledrun['position_longitude'];
-                       if (!$lat || !$lon) continue;
-                       $output .= "<p data-lon=\"$lon\" data-lat=\"$lat\" data-title=\"{$sledrun['page_title']}\" />\n";
+               $json_features = array();
+
+               // append all sledruns as icon
+               if ($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('<wrmap>' . $content . '</wrmap>'));
+               } catch (Exception $e) {
+                       return htmlspecialchars($e);
                }
+
+               // create final geojson
+               $json = array(
+                       'type' => 'FeatureCollection',
+                       'features' => $json_features
+               );
+               $json_string = json_encode($json);
+
+               // Create <div/> element where the map is placed in
+               global $wgExtensionAssetsPath;
+               $output = "<div class=\"wrmap\" style=\"width: $width_s; height: $height_s; border-style:none;\" data-center-lon=\"$longitude_s\" data-center-lat=\"$latitude_s\" data-zoom=\"$zoom\" data-img-path=\"$wgExtensionAssetsPath/wrmap/openlayers/img/\">";
+               $output .= "<script type=\"application/json\">";
+               $output .= htmlspecialchars($json_string, ENT_NOQUOTES);
+               $output .= "</script>";
                $output .= "</div>\n";
                
                return $output;
        }
+}
 
+
+// <wrmap> tag
+class WrMap extends WrBaseMap {
 }
 
 
+// <wrgmap> tag
+class WrGMap extends WrBaseMap {
+}
+
 ?>