<?php

/**
*
*
*/
function DisplayWPAConfig(){
  $status = new StatusMessages();
  $networks = array();

  // Find currently configured networks
  exec(' sudo cat ' . RASPI_WPA_SUPPLICANT_CONFIG, $known_return);

  $network = null;
  $ssid = null;

  foreach($known_return as $line) {
    if (preg_match('/network\s*=/', $line)) {
      $network = array('visible' => false, 'configured' => true, 'connected' => false);
    } elseif ($network !== null) {
      if (preg_match('/^\s*}\s*$/', $line)) {
        $networks[$ssid] = $network;
        $network = null;
        $ssid = null;
      } elseif ($lineArr = preg_split('/\s*=\s*/', trim($line))) {
        switch(strtolower($lineArr[0])) {
          case 'ssid':
            $ssid = trim($lineArr[1], '"');
            break;
          case 'psk':
            if (array_key_exists('passphrase', $network)) {
              break;
            }
          case '#psk':
            $network['protocol'] = 'WPA';
          case 'wep_key0': // Untested
            $network['passphrase'] = trim($lineArr[1], '"');
            break;
          case 'key_mgmt':
            if (! array_key_exists('passphrase', $network) && $lineArr[1] === 'NONE') {
              $network['protocol'] = 'Open';
            }
            break;
          case 'priority':
            $network['priority'] = trim($lineArr[1], '"');
            break;
        }
      }
    }
  }

   if ( isset($_POST['connect']) ) {
    $result = 0;
    exec ( 'sudo wpa_cli -i ' . RASPI_WPA_CTRL_INTERFACE . ' select_network '.strval($_POST['connect'] ));
  }
  else if ( isset($_POST['client_settings']) && CSRFValidate() ) {
    $tmp_networks = $networks;
    if ($wpa_file = fopen('/tmp/wifidata', 'w')) {
      fwrite($wpa_file, 'ctrl_interface=DIR=' . RASPI_WPA_CTRL_INTERFACE . ' GROUP=netdev' . PHP_EOL);
      fwrite($wpa_file, 'update_config=1' . PHP_EOL);

      foreach(array_keys($_POST) as $post) {
        if (preg_match('/delete(\d+)/', $post, $post_match)) {
          unset($tmp_networks[$_POST['ssid' . $post_match[1]]]);
        } elseif (preg_match('/update(\d+)/', $post, $post_match)) {
          // NB, at the moment, the value of protocol from the form may
          // contain HTML line breaks
          $tmp_networks[$_POST['ssid' . $post_match[1]]] = array(
            'protocol' => ( $_POST['protocol' . $post_match[1]] === 'Open' ? 'Open' : 'WPA' ),
            'passphrase' => $_POST['passphrase' . $post_match[1]],
            'configured' => true
          );
          if (array_key_exists('priority' . $post_match[1], $_POST)) {
            $tmp_networks[$_POST['ssid' . $post_match[1]]]['priority'] = $_POST['priority' . $post_match[1]];
          }
        }
      }

      $ok = true;
      foreach($tmp_networks as $ssid => $network) {
        if ($network['protocol'] === 'Open') {
          fwrite($wpa_file, "network={".PHP_EOL);
          fwrite($wpa_file, "\tssid=\"".$ssid."\"".PHP_EOL);
          fwrite($wpa_file, "\tkey_mgmt=NONE".PHP_EOL);
          if (array_key_exists('priority', $network)) {
            fwrite($wpa_file, "\tpriority=".$network['priority'].PHP_EOL);
          }
          fwrite($wpa_file, "}".PHP_EOL);
        } else {
          if (strlen($network['passphrase']) >=8 && strlen($network['passphrase']) <= 63) {
            unset($wpa_passphrase);
            unset($line);
            exec( 'wpa_passphrase '.escapeshellarg($ssid). ' ' . escapeshellarg($network['passphrase']),$wpa_passphrase );
            foreach($wpa_passphrase as $line) {
              if (preg_match('/^\s*}\s*$/', $line)) {
                if (array_key_exists('priority', $network)) {
                  fwrite($wpa_file, "\tpriority=".$network['priority'].PHP_EOL);
                }
                fwrite($wpa_file, $line.PHP_EOL);
              } else {
                fwrite($wpa_file, $line.PHP_EOL);
              }
            }
          } else {
            $status->addMessage('WPA passphrase must be between 8 and 63 characters', 'danger');
            $ok = false;
          }
        }
      }

      if ($ok) {
        system( 'sudo cp /tmp/wifidata ' . RASPI_WPA_SUPPLICANT_CONFIG, $returnval );
        if( $returnval == 0 ) {
          exec('sudo wpa_cli -i ' . RASPI_WIFI_CLIENT_INTERFACE . ' reconfigure', $reconfigure_out, $reconfigure_return );
          if ($reconfigure_return == 0) {
            $status->addMessage('Wifi settings updated successfully', 'success');
            $networks = $tmp_networks;
          } else {
            $status->addMessage('Wifi settings updated but cannot restart (cannot execute "wpa_cli reconfigure")', 'danger');
          }
        } else {
          $status->addMessage('Wifi settings failed to be updated', 'danger');
        }
      }
    } else {
      $status->addMessage('Failed to update wifi settings', 'danger');
    }
  }

  exec( 'sudo wpa_cli -i ' . RASPI_WIFI_CLIENT_INTERFACE . ' scan' );
  sleep(3);
  exec( 'sudo wpa_cli -i ' . RASPI_WIFI_CLIENT_INTERFACE . ' scan_results',$scan_return );

  array_shift($scan_return);

  // display output
  foreach( $scan_return as $network ) {
    $arrNetwork = preg_split("/[\t]+/",$network);  // split result into array

    // Save RSSI
    if (array_key_exists(4, $arrNetwork)) {
      $networks[$arrNetwork[4]]['RSSI'] = $arrNetwork[2];
    }

    // If network is saved
    if (array_key_exists(4, $arrNetwork) && array_key_exists($arrNetwork[4], $networks)) {
      $networks[$arrNetwork[4]]['visible'] = true;
      $networks[$arrNetwork[4]]['channel'] = ConvertToChannel($arrNetwork[1]);
      // TODO What if the security has changed?
    } else {
      $networks[$arrNetwork[4]] = array(
        'configured' => false,
        'protocol' => ConvertToSecurity($arrNetwork[3]),
        'channel' => ConvertToChannel($arrNetwork[1]),
        'passphrase' => '',
        'visible' => true,
        'connected' => false
      );
    }
  }

  exec( 'iwconfig ' . RASPI_WIFI_CLIENT_INTERFACE, $iwconfig_return );
  foreach ($iwconfig_return as $line) {
    if (preg_match( '/ESSID:\"([^"]+)\"/i',$line,$iwconfig_ssid )) {
      $networks[$iwconfig_ssid[1]]['connected'] = true;
    }
  }
?>

  <div class="row">
    <div class="col-lg-12">
      <div class="panel panel-primary"> 
        <div class="panel-heading"><i class="fa fa-signal fa-fw"></i> <?php echo _("Configure client"); ?></div>
        <!-- /.panel-heading -->
        <div class="panel-body">
          <p><?php $status->showMessages(); ?></p>
          <h4><?php echo _("Client settings"); ?></h4>
              <div class="btn-group btn-block">
	          <a href=".?<?php echo htmlspecialchars($_SERVER['QUERY_STRING'], ENT_QUOTES); ?>" style="padding:10px;float: right;display: block;position: relative;margin-top: -55px;" class="col-md-2 btn btn-info" id="update"><?php echo _("Rescan"); ?></a>
	        </div> 

            <form method="POST" action="?page=wpa_conf" name="wpa_conf_form">
              <?php CSRFToken() ?>
              <input type="hidden" name="client_settings" ?>
              <script>
                function showPassword(index) {
                    var x = document.getElementsByName("passphrase"+index)[0];
                    if (x.type === "password") {
                        x.type = "text";
                    } else {
                        x.type = "password";
                    }
                }
              </script>

              <?php $index = 0; ?>
              <?php foreach ($networks as $ssid => $network) { ?>
 
              <div class="col-md-6">
                <div class="panel panel-default">
                  <div class="panel-body">

                  <input type="hidden" name="ssid<?php echo $index ?>" value="<?php echo htmlentities($ssid, ENT_QUOTES) ?>" />
                  <h4><?php echo htmlspecialchars($ssid, ENT_QUOTES); ?></h4>

                  <div class="row">
                    <div class="col-xs-4 col-md-4">Status</div>
                    <div class="col-xs-4 col-md-4">
                      <?php if ($network['configured']) { ?>
                        <i class="fa fa-check-circle fa-fw"></i>
                      <?php } ?>
                      <?php if ($network['connected']) { ?>
                        <i class="fa fa-exchange fa-fw"></i>
                      <?php } ?>
                     </div>
                  </div>

                  <div class="row">
                    <div class="col-xs-4 col-md-4">Channel</div>
                    <div class="col-xs-4 col-md-4">
                      <?php if ($network['visible']) { ?>
                          <?php echo htmlspecialchars($network['channel'], ENT_QUOTES) ?>
                      <?php } else { ?>
                          <span class="label label-warning"> X </span>
                      <?php } ?>
                    </div>
                  </div>

                  <div class="row">
                    <div class="col-xs-4 col-md-4">RSSI</div>
                    <div class="col-xs-6 col-md-6">
                    <?php echo htmlspecialchars($network['RSSI'], ENT_QUOTES);
                        echo "dB (";
                        if($network['RSSI'] >= -50) { echo 100; }
                        else if($network['RSSI'] <= -100) { echo 0;}
                        else {echo  2*($network['RSSI'] + 100); }
                        echo "%)";
                    ?>
                    </div>
                  </div>

                  <?php if (array_key_exists('priority', $network)) { ?>
                      <input type="hidden" name="priority<?php echo $index ?>" value="<?php echo htmlspecialchars($network['priority'], ENT_QUOTES); ?>" />
                  <?php } ?>
                  <input type="hidden" name="protocol<?php echo $index ?>" value="<?php echo htmlspecialchars($network['protocol'], ENT_QUOTES); ?>" />

                  <div class="row">
                    <div class="col-xs-4 col-md-4">Security</div>
                    <div class="col-xs-6 col-md-6"><?php echo $network['protocol'] ?></div>
                  </div>

                  <div class="form-group">
                    <div class="input-group col-xs-12 col-md-12">
                      <span class="input-group-addon" id="passphrase">Passphrase</span>
                      <?php if ($network['protocol'] === 'Open') { ?> 
                          <input type="hidden" name="passphrase<?php echo $index ?>" value="" />--- 
                      <?php } else { ?>
                          <input type="password" class="form-control" aria-describedby="passphrase" name="passphrase<?php echo $index ?>" value="<?php echo $network['passphrase'] ?>" onKeyUp="CheckPSK(this, 'update<?php echo $index?>')" >
                          <span class="input-group-btn">
                            <button class="btn btn-default" onclick="showPassword(<?php echo $index; ?>)" type="button">Show</button>
                          </span>
                      <?php } ?>
                    </div>
                  </div>

                  <div class="btn-group btn-block ">
                    <?php if ($network['configured']) { ?>
                        <input type="submit" class="col-xs-4 col-md-4 btn btn-warning" value="<?php echo _("Update"); ?>" id="update<?php echo $index ?>" name="update<?php echo $index ?>"<?php echo ($network['protocol'] === 'Open' ? ' disabled' : '')?> />
                        <button type="submit" class="col-xs-4 col-md-4 btn btn-info" value="<?php echo $index?>" ><?php echo _("Connect"); ?></button>
                    <?php } else { ?>
                        <input type="submit" class="col-xs-4 col-md-4 btn btn-info" value="<?php echo _("Add"); ?>" id="update<?php echo $index ?>" name="update<?php echo $index ?>" <?php echo ($network['protocol'] === 'Open' ? '' : ' disabled')?> />
                    <?php } ?>
                        <input type="submit" class="col-xs-4 col-md-4 btn btn-danger" value="<?php echo _("Delete"); ?>" name="delete<?php echo $index ?>"<?php echo ($network['configured'] ? '' : ' disabled')?> />
                  </div><!-- /.btn-group -->

                </div><!-- /.panel-body -->
              </div><!-- /.panel-default -->
            </div><!-- /.col-md-6 -->

            <?php $index += 1; ?>
            <?php } ?>

          </form>
        </div><!-- ./ Panel body -->
	<div class="panel-footer"><?php echo _("<strong>Note:</strong> WEP access points appear as 'Open'. LokiAP does not currently support connecting to WEP"); ?></div>
      </div><!-- /.panel-primary -->
    </div><!-- /.col-lg-12 -->
  </div><!-- /.row -->
<?php
}

?>
