#!/usr/bin/lua
--[[

	Part of AREDN -- Used for creating Amateur Radio Emergency Data Networks
	Copyright (C) 2016 Darryl Quinn
	See Contributors file for additional contributors

	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation version 3 of the License.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program.	If not, see <http://www.gnu.org/licenses/>.

	Additional Terms:

	Additional use restrictions exist on the AREDN(TM) trademark and logo.
		See AREDNLicense.txt for more info.

	Attributions to the AREDN Project must be retained in the source code.
	If importing this code into a new or existing project attribution
	to the AREDN project must be added to the source code.

	You must not misrepresent the origin of the material contained within.

	Modified versions must be modified to attribute to the original source
	and be marked in reasonable ways as differentiate it from the original
	version

--]]

require("uci")
require("aredn.uci")
require("aredn.utils")
require("aredn.http")
require("nixio")
local ipc = require("luci.ip")
local json = require ("luci.jsonc")

-- Function extensions
os.capture = capture


-- ==== MAIN =====
ctx = uci.cursor()
if not ctx then
		error("Failed to get uci cursor")
end

info={}

-- API version
info['api_version']="1.1"

-- NODE name
css=getUciConfType("system", "system")
info['node']=css[0]['hostname']

-- MODEL
m=os.capture("/usr/local/bin/get_model")
info['model']=m:chomp()

-- BOARD ID
info['board_id']=hardware_boardid()

-- Firmware Manufacturer
local fw_mfg="AREDN"
if not file_exists("/www/AREDN.png") then
	fw_mfg = "Other"
end
info['firmware_mfg']=fw_mfg

-- Firmware version
local relfile=io.open("/etc/mesh-release","r")
local fv=""
if relfile~=nil then
	fv=relfile:read()
	relfile:close()
end
info['firmware_version']=fv:chomp()

-- Tunnel Installed
local tunnel_installed=false
if file_exists("/usr/sbin/vtund") then
	tunnel_installed="true"
end
info["tunnel_installed"]=tunnel_installed

-- SSID
local myssid=""
wif=getUciConfType("wireless", "wifi-iface")
for pos, t in pairs(wif) do
	if wif[pos]['network']=="wifi" then
		myssid=wif[pos]['ssid']
	end
end
info["ssid"]=myssid

--Wifi Channel Number
local chan=""
chan = tonumber(ctx:get("wireless", "radio0", "channel"))
-- 3GHZ channel -> Freq conversion
if (chan >= 76 and chan <= 99) then
	chan=(chan * 5) + 3000
end
info["channel"]=tostring(chan)


--Wifi Bandwidth
local chanbw=""
chanbw = ctx:get("wireless", "radio0", "chanbw")
info["chanbw"]=chanbw

-- ACTIVE TUNNELS
local atc=""
atc=os.capture("ifconfig|grep tun|wc -l")
info["active_tunnel_count"]=atc:chomp()

-- LAT/LON
local llfname="/etc/latlon"
local lat=""
local lon=""
if file_exists(llfname) then
	llfile=io.open(llfname,"r")
	if llfile~=nil then
		lat=llfile:read()
		lon=llfile:read()
		llfile:close()
	end
end
info["lat"]=lat
info["lon"]=lon

-- GRID SQUARE
local gsfname="/etc/gridsquare"
local grid=""
if file_exists(gsfname) then
	gsfile=io.open(gsfname,"r")
	if gsfile~=nil then
		grid=gsfile:read()
		gsfile:close()
	end
end
info["grid_square"]=grid

-- INTERFACES
local tif={}
local ift=get_interfaces()

for pos, i in pairs(ift) do
	local nim={}
	local ipv4=""
	if (i.name ~= "lo" and i.name ~= "wlan0-1") then
		--table.print(i)
		nim['name']=i.name
		ipv4=tostring(i.ipaddrs[1])
		nim['ip']=ipFromCIDR(ipv4)
		if i.macaddr~=nil then	-- ie. tunXX interfaces have nil for macaddr
			nim['mac']=i.macaddr:upper()
		end
		table.insert(tif,nim)
	end
end
info["interfaces"]=tif

-- HOSTS
if string.find(nixio.getenv("QUERY_STRING"):lower(),"hosts=1") then
	local hosts={}
	local lines={}
	local pos, val
	local hfile=io.open("/var/run/hosts_olsr","r")
	if hfile~=nil then
		for line in hfile:lines() do
			table.insert(lines,line)
		end
		hfile:close()
		for pos,val in pairs(lines) do
			local host={}

			-- local data,comment = string.match(val,"^([^#;]+)[#;]*(.*)$")
			local data,comment = string.match(val,"^([^#;]+)[#;]*(.*)$")

			if data then
				--local ip, name=string.match(data,"^%s*([%x%.%:]+)%s+(%S.*)\t%s*$")
				local ip, name=string.match(data,"^([%x%.%:]+)%s+(%S.*)\t%s*$")
				if ip and name then
					if not string.match(name,"^(dtdlink[.]).*") then
						if not string.match(name,"^(mid[0-9][.]).*") then
							host['name']=name
							host['ip']=ip
							table.insert(hosts,host)
						end
					end
				end
			end
		end
	else
		host['error']="Cannot read hosts file"
		table.insert(hosts,host)
	end
	info["hosts"]=hosts
end

-- SERVICES
if string.find(nixio.getenv("QUERY_STRING"):lower(),"services=1") then
	local services={}
	local lines={}
	local pos, val
	local hfile=io.open("/var/run/services_olsr","r")
	if hfile~=nil then
		for line in hfile:lines() do
			table.insert(lines,line)
		end
		hfile:close()
		for pos,val in pairs(lines) do
			local service={}
			local link,protocol,name = string.match(val,"^(.*)|(.+)|(.*)\t+%s+.*")
			if link and protocol and name then
				service['link']=link
				service['protocol']=protocol
				service['name']=name
				table.insert(services,service)
			end
		end
	else
		service['error']="Cannot read services file"
		table.insert(services,service)
	end
	info["services"]=services
end

-- Output the HTTP header for JSON
json_header()

-- Output the info table as json
print(json.stringify(info,true))