
<?php
require_once('Transformer.php');

class GoogleMaps extends Transformer {

  private $detailsFields = array();

  public function transform() {
    // make sure there is an address field
    if (empty($this->extraArgs['addressField'])) {
      throw new MissingArgumentsException(array('addressField'));
    }
    
    // create a DOM object and an xpath object
    $xmlDoc  = new DOMDocument();
    $xmlDoc->loadXML($this->xmlContents);
    $xmlRoot = $xmlDoc->documentElement;    
    $xpath   = new DOMXPath($xmlDoc);
        
    // get the values of the fields
    $groupsOrFields = $xmlRoot->childNodes;
    $groupNodes     = array();
    $fieldNodes     = array();
    for ($i=0; $i<$groupsOrFields->length; $i++) {
      $childNode = $groupsOrFields->item($i);

      if ($childNode->nodeType != XML_ELEMENT_NODE)
        continue;

      if ($childNode->getAttribute('type') == 'group')
        $groupNodes[] = $childNode;
      elseif ($childNode->getAttribute('type') == 'field')
        $fieldNodes[] = $childNode;
    }
  
    // set up the key
    $key = 'YourGoogleMapsKey';

    // start HTML
    header('Content-type: text/html; charset=UTF-8');
    
    ?>
    <html>
      <head>
        <title>
          Google Maps: 
          <?php echo $xpath->query("//elements/dapper/dappTitle")->item(0)->nodeValue;?>
        </title>
        <script src="/prototype.js" type="text/javascript"></script>
        <script src="http://maps.google.com/maps?file=api&v=2&key=<?php echo $key;?>" type="text/javascript"></script>
      </head>
      <body onload="addAddresses();">
        <?php
        if (!empty($this->extraArgs['pageTitle']))
          echo '<h1>'.$this->extraArgs['pageTitle'].'</h1>';
        ?>
        <center>
          <div id="mapc"></div>
        </center>
        <script type="text/javascript">
        
        var first = true;
        var geocoder = new GClientGeocoder();
    
        map = new GMap2(document.getElementById("mapc"));
        map.addControl(new GLargeMapControl());    
        map.addControl(new GMapTypeControl());        
        map.setCenter(new GLatLng(36.315125,-32.695312), 2);
    
        function addAddress(address, details) {
          geocoder.getLatLng(
            address,
            function(point) {
              if (point) {
                addPointToMap(point, details);
              }
            }
          );      
        }
        
        function addPointToMap(point, details) {
          var marker = new GMarker(point);
          map.addOverlay(marker);
    
          if (typeof details != 'undefined') {
            GEvent.addListener(marker, "click", function() {
                marker.openInfoWindowHtml(details);
            });
          }
          
          if (first) {
            first = false;
            map.setCenter(point, 11);
          }  
        }    


    
    function addAddresses() {

    <?php

    $addressField  = $this->extraArgs['addressField'];
    $detailsFields = !empty($this->extraArgs['detailsField']) ? $this->extraArgs['detailsField'] : array();
    if (!is_array($detailsFields))
      $detailsFields = array($detailsFields);
    $this->detailsFields = $detailsFields;

    foreach ($groupNodes as $groupNode) {
      $fields = $groupNode->childNodes;
            
      $groupFields = array();
      
      for ($j=0; $j<$fields->length; $j++) {
        $fNode = $fields->item($j);
        if ($fNode->nodeType != XML_ELEMENT_NODE)
          continue;
          
        if ($fNode->tagName == $addressField || in_array($fNode->tagName,$this->detailsFields)) {
          $groupFields[$fNode->tagName] = $fNode;

        }
      }
      $addressNode  = null;
      $detailsNodes = null;
      
      if (!empty($groupFields[$addressField]))
        $addressNode = $groupFields[$addressField];
      
      foreach ($this->detailsFields as $detailsField) {
        if (!empty($groupFields[$detailsField])) {
            $detailsNodes[] = $groupFields[$detailsField];
        }
      }

      if (isset($addressNode)) {
        $this->addMarker($addressNode,$detailsNodes);
      }
    }
    
    if (sizeof($fieldNodes)) {
      foreach ($fieldNodes as $fieldNode) {
        $this->addMarker($fieldNode);
      }
    }    
    
    ?>
    }
    </script>
    </body>
    </html>
    <?php    
  }
    
  private function addMarker($addressNode, $detailsNodes=null) {
    if ($addressNode->nodeType != XML_ELEMENT_NODE)
      return;

    if ($addressNode->getAttribute('type') == 'field') {
        
      $display = $addressNode->nodeValue;

      // if this is the address field, then get it's long/lat and make pin
      if ($addressNode->tagName == $this->extraArgs['addressField']) {
        $address = preg_replace("/'/","\\'",$display);
        $address = preg_replace("/\n/s"," ",$address);
        $address = preg_replace("//",",",$address);
        $this->markerIndex++;

        if (sizeof($this->detailsFields) && isset($detailsNodes) && sizeof($detailsNodes)) {
            
            $detailsArray = array();
            foreach ($detailsNodes as $detailsNode) {
              if (in_array($detailsNode->tagName,$this->detailsFields)) {
                $details = preg_replace("/'/","\\'",$detailsNode->nodeValue);
                $details = preg_replace("/\n/","\\n",$details);
                $detailsArray[] = $details;
              }
            }
            $detailsDisplay = join("<br/>", $detailsArray);
            echo "addAddress('".$address."','".$detailsDisplay."');\n";
  
        }
        else
          echo "addAddress('".$address."');\n";
      
      }

    }
  }
  
  public static function getDetails() {
    $details = array();
    
    $details['args']['addressField'] = array('type'     => DAPP_FIELD,
                                             'required' => true,
                                             'display'  => 'Address Field');
    
    $details['args']['detailsField'] = array('type'     => DAPP_FIELD_MULTI,
                                             'required' => false,
                                             'display'  => 'Details Fields');

    $details['args']['pageTitle']    = array('type'     => USER_FREEFORM,
                                             'required' => false,
                                             'display'  => 'Page Title'
                                             );

    $details['description']   = 'Transforms the output of a Dapp into a Google Map.';
    
    return $details;
  }

}

?>