<?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']));
    } elseif (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;
                    } elseif ($network['RSSI'] <= -100) {
                        echo 0;
                    } else {
                        echo  2*($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'. RaspAP does not currently support connecting to WEP"); ?></div>
      </div><!-- /.panel-primary -->
    </div><!-- /.col-lg-12 -->
  </div><!-- /.row -->
<?php
}

?>