#!/usr/bin/lua

local json = require 'luci.jsonc'
local nixio = require 'nixio'

function neighbours()
  local neighbours = {}
  local list = io.lines("/sys/kernel/debug/batman_adv/bat0/originators")
  for line in list do
    local mac1, lastseen, tq, mac2, ifname =
      line:match("^([0-9a-f:]+) +(%d+%.%d+)s +%( *(%d+)%) +([0-9a-f:]+) +%[ *(.-)%]")

    if mac1 ~= nil and mac1 == mac2 then
      neighbours[mac1] = { tq = tonumber(tq)
                         , lastseen = tonumber(lastseen)
                         , ifname = ifname
                         }
    end
  end

  return neighbours
end

io.write("Access-Control-Allow-Origin: *\n")
io.write("Content-type: text/event-stream\n\n")

while true do
  local neighbours = json.stringify(neighbours())
  io.write("data: " .. neighbours .. "\n\n")
  io.flush()
  nixio.nanosleep(1, 0)
end