<?php
/*
 Save settings of network devices (type, name, PW, APN ...)
  
 Called by js saveNetDeviceSettings (App/js/custom.js)
*/


require '../../includes/csrf.php';

require_once '../../includes/config.php';
require_once '../../includes/functions.php';

if (isset($_POST['interface'])) {
    $int = $_POST['interface'];
    $cfg = [];
    $file = $int.".ini";
    $cfgfile="/etc/wvdial.conf";
    if ( $int == "mobiledata") {
      $cfg['pin'] = $_POST["pin-mobile"];
      $cfg['apn'] = $_POST["apn-mobile"];
      $cfg['apn_user'] = $_POST["apn-user-mobile"];
      $cfg['apn_pw'] = $_POST["apn-pw-mobile"];
      if (file_exists($cfgfile)) {
        if($cfg["pin"] !== "") exec('sudo /bin/sed -i  "s/CPIN=\".*\"/CPIN=\"'.$cfg["pin"].'\"/gi" '.$cfgfile);
        if($cfg["apn"] !== "") exec('sudo /bin/sed -i "s/\"IP\"\,\".*\"/\"IP\"\,\"'.$cfg["apn"].'\"/gi" '.$cfgfile);
        if($cfg["apn_user"] !== "") exec('sudo /bin/sed -i "s/^username = .*$/Username = '.$cfg["apn_user"].'/gi" '.$cfgfile);
        if($cfg["apn_pw"] !== "") exec('sudo /bin/sed -i "s/^password = .*$/Password = '.$cfg["apn_pw"].'/gi" '.$cfgfile);
      }
    } else if ( preg_match("/netdevices/",$int)) {
        if(!isset($_POST['opts']) ) {
          $jsonData = ['return'=>0,'output'=>['No valid data to add/delete udev rule ']];
          echo json_encode($jsonData);
          return;
        } else {
          $opts=explode(" ",$_POST['opts'] );
          $dev=$opts[0];
          $vid=$_POST["int-vid-".$dev];
          $pid=$_POST["int-pid-".$dev];
          $mac=$_POST["int-mac-".$dev];
          $name=trim($_POST["int-name-".$dev]);
          $type=$_POST["int-type-".$dev];
          $newtype=$_POST["int-new-type-".$dev];
          $udevfile=$_SESSION["udevrules"]["udev_rules_file"];
          // $udevfile="/etc/udev/rules.d/80-net-devices.rules";

          // find the rule prototype and prefix
          $rule = "";
          foreach($_SESSION["udevrules"]["network_devices"] as $devt) {
             if($devt["type"]==$newtype) {
                $rule = $devt["udev_rule"];
                $prefix = $devt["name_prefix"];
             }
          }
          if(!empty($mac)) $rule = preg_replace("/\\\$MAC\\\$/i",$mac,$rule);
          if(!empty($vid)) $rule = preg_replace("/\\\$IDVENDOR\\\$/i",$vid,$rule);
          if(!empty($pid)) $rule = preg_replace("/\\\$IDPRODUCT\\\$/i",$pid,$rule);
          // check for existing rule
          $pre="";
          if(preg_match("/^(\w+)[0-9]$/",$dev,$match)=== 1) $pre=$match[1];
          $ruleold = preg_replace("/\\\$DEVNAME\\\$/i",$pre.".",$rule);
          exec("grep -oP '".$ruleold."' $udevfile",$ret);
          $newRule = empty($ret) || !empty($name);
          // delete current entry
          if(!empty($ret)) exec("sudo sed -i '/^".$ruleold."$/d' ".$udevfile);
          exec('sudo sed -i "/^.*'.$mac.'.*$/d" '.$udevfile);
          if($newRule) {
            // create new entry
            if(empty($name)) $name = $prefix."0";
            if(!empty($name)) $rule = preg_replace("/\\\$DEVNAME\\\$/i",$name,$rule);
            if (!empty($rule) ) exec('echo \''.$rule.'\' | sudo /usr/bin/tee -a '.$udevfile);
          }
          $ret=print_r($ret,true);
          $jsonData = ['return'=>0,'output'=>['Udev rules changed for device '.$dev ] ];
          echo json_encode($jsonData);
          return;
        }
    } else {
      $ip = $_POST[$int.'-ipaddress'];
      $netmask = mask2cidr($_POST[$int.'-netmask']);
      $dns1 = $_POST[$int.'-dnssvr'];
      $dns2 = $_POST[$int.'-dnssvralt'];

      $cfg['interface'] = $int;
      $cfg['routers'] = $_POST[$int.'-gateway'];
      $cfg['ip_address'] = $ip."/".$netmask;
      $cfg['domain_name_server'] = $dns1." ".$dns2;
      $cfg['static'] = $_POST[$int.'-static'];
      $cfg['failover'] = $_POST[$int.'-failover'];
    }
    if (write_php_ini($cfg, RASPI_CONFIG_NETWORKING.'/'.$file)) {
        $jsonData = ['return'=>0,'output'=>['Successfully Updated Network Configuration']];
    } else {
        $jsonData = ['return'=>1,'output'=>['Error saving network configuration to file']];
    }
} else {
    $jsonData = ['return'=>2,'output'=>'Unable to detect interface'];
}

echo json_encode($jsonData);