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<%#
 Copyright 2016-2017 Dan Luedtke <mail@danrl.com>
 Licensed to the public under the Apache License 2.0.
-%>

<%
  local data = { }
  local last_device = ""

  local wg_dump = io.popen("wg show all dump")
  if wg_dump then
    local line
    for line in wg_dump:lines() do
      local line = string.split(line, "\t")
      if not (last_device == line[1]) then
        last_device = line[1]
        data[line[1]] = {
          name                 = line[1],
          public_key           = line[3],
          listen_port          = line[4],
          fwmark               = line[5],
          peers                = { }
        }
      else
        local peer = {
          public_key           = line[2],
          endpoint             = line[4],
          allowed_ips          = { },
          latest_handshake     = line[6],
          transfer_rx          = line[7],
          transfer_tx          = line[8],
          persistent_keepalive = line[9]
        }
        if not (line[4] == '(none)') then
          for ipkey, ipvalue in pairs(string.split(line[5], ",")) do
            if #ipvalue > 0 then
              table.insert(peer['allowed_ips'], ipvalue)
            end
          end
        end
        table.insert(data[line[1]].peers, peer)
      end
    end
  end

  if luci.http.formvalue("status") == "1" then
    luci.http.prepare_content("application/json")
    luci.http.write_json(data)
    return
  end
-%>

<%+header%>

<script type="text/javascript" src="<%=resource%>/cbi.js"></script>
<script type="text/javascript">//<![CDATA[

  function bytes_to_str(bytes) {
    bytes = parseFloat(bytes);
    if (bytes < 1) { return "0 B"; }
    var sizes = ['B', 'KiB', 'MiB', 'GiB', 'TiB', 'PiB'];
    var i = parseInt(Math.floor(Math.log(bytes) / Math.log(1024)));
    return Math.round(bytes / Math.pow(1024, i), 2) + ' ' + sizes[i];
  };

  function timestamp_to_str(timestamp) {
    if (timestamp < 1) {
      return '<%:Never%>';
    }
    var now = new Date();
    var seconds = (now.getTime() / 1000) - timestamp;
    var ago = "";
    if (seconds < 60) {
      ago = parseInt(seconds) + '<%:s ago%>';
    } else if (seconds < 3600) {
      ago = parseInt(seconds / 60) + '<%:m ago%>';
    } else if (seconds < 86401) {
      ago = parseInt(seconds / 3600) + '<%:h ago%>';
    } else {
      ago = '<%:over a day ago%>';
    }
    var t = new Date(timestamp * 1000);
    return t.toUTCString() + ' (' + ago + ')';
  }

  XHR.poll(5, '<%=REQUEST_URI%>', { status: 1 },
   function(x, data) {
    for (var key in data) {
      if (!data.hasOwnProperty(key)) { continue; }
      var ifname = key;
      var iface = data[key];
      var s = "";
      if (iface.public_key == '(none)') {
        s += '<em><%:Interface does not have a public key!%></em>';
      } else {
        s += String.format(
          '<strong><%:Public Key%>: </strong>%s',
          iface.public_key
        );
      }
      if (iface.listen_port > 0) {
        s += String.format(
          '<br /><strong><%:Listen Port%>: </strong>%s',
          iface.listen_port
        );
      }
      if (iface.fwmark != 'off') {
        s += String.format(
          '<br /><strong><%:Firewall Mark%>: </strong>%s',
          iface.fwmark
        );
      }
      document.getElementById(ifname + "_info").innerHTML = s;
      for (var i = 0, ilen = iface.peers.length; i < ilen; i++) {
        var peer = iface.peers[i];
        var s = String.format(
          '<strong><%:Public Key%>: </strong>%s',
          peer.public_key
        );
        if (peer.endpoint != '(none)') {
          s += String.format(
            '<br /><strong><%:Endpoint%>: </strong>%s',
            peer.endpoint
          );
        }
        if (peer.allowed_ips.length > 0) {
          s += '<br /><strong><%:Allowed IPs%>:</strong>';
          for (var k = 0, klen = peer.allowed_ips.length; k < klen; k++) {
            s += '<br />&nbsp;&nbsp;&bull;&nbsp;' + peer.allowed_ips[k];
          }
        }
        if (peer.persistent_keepalive != 'off') {
          s += String.format(
            '<br /><strong><%:Persistent Keepalive%>: </strong>%ss',
            peer.persistent_keepalive
          );
        }
        var icon = '<img src="<%=resource%>/icons/tunnel_disabled.png" />';
        var now = new Date();
        if (((now.getTime() / 1000) - peer.latest_handshake) < 140) {
          icon = '<img src="<%=resource%>/icons/tunnel.png" />';
        }
        s += String.format(
          '<br /><strong><%:Latest Handshake%>: </strong>%s',
          timestamp_to_str(peer.latest_handshake)
        );
        s += String.format(
          '<br /><strong><%:Data Received%>: </strong>%s' +
          '<br /><strong><%:Data Transmitted%>: </strong>%s',
          bytes_to_str(peer.transfer_rx),
          bytes_to_str(peer.transfer_tx)
        );
        document.getElementById(ifname + "_" + peer.public_key + "_icon").innerHTML = icon;
        document.getElementById(ifname + "_" + peer.public_key + "_info").innerHTML = s;
      }
    }
  });
//]]></script>

<h2>WireGuard Status</h2>

<fieldset class="cbi-section">
<%-
for ikey, iface in pairs(data) do
  -%>
  <legend><%:Interface%> <%=ikey%></legend>
  <table width="100%" cellspacing="10">
    <tr>
      <td width="33%" style="vertical-align:top"><%:Configuration%></td>
      <td>
        <table>
          <tr>
            <td id="<%=ikey%>_icon" style="width:16px; text-align:center; padding:3px">
              &nbsp;
            </td>
            <td id="<%=ikey%>_info" style="vertical-align:middle; padding: 3px">
              <em><%:Collecting data...%></em>
            </td>
        </tr></table>
      </td>
    </tr>
  <%-
  for pkey, peer in pairs(iface.peers) do
    -%>
    <tr>
      <td width="33%" style="vertical-align:top"><%:Peer%></td>
      <td>
        <table>
          <tr>
            <td id="<%=ikey%>_<%=peer.public_key%>_icon" style="width:16px; text-align:center; padding:3px">
              <img src="<%=resource%>/icons/tunnel_disabled.png" /><br />
              <small>?</small>
            </td>
            <td id="<%=ikey%>_<%=peer.public_key%>_info" style="vertical-align:middle; padding: 3px">
              <em><%:Collecting data...%></em>
            </td>
        </tr></table>
      </td>
    </tr>
    <%-
  end
  -%>
  </table>
  <%-
end
-%>
</fieldset>

<%+footer%>