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module(..., package.seeall)

require("fs")
require("procps")
require("getopts")
require("format")
require("daemoncontrol")
require("validator")

local configfile = "/etc/opennhrp/opennhrp.conf"
local processname = "opennhrp"
local baseurl = "/etc/opennhrp/"

local descr = {
	Type = {
	['incomplete']="The protocol address is being resolved",
	['negative']="This protocol address is not available",
	['cached']="Protocol address was resolved successfully",
	['route']="This is a dynamic shortcut",
	['dynamic']="This entry is from a node that connected to us",
	['local']="Local interface address",
	['static']="Static mapping from configuration file (e.g. address of core)",
	},
	Flags= {
--	['up']="Connection is fully usable",
	['lower-up']="ipsec connections is up, but registration is not yet done",
	},
}

local function get_version()
	local cmd_output_result, cmd_output_error
	local cmd = "/sbin/apk_version -vs " .. processname .." 2>/dev/null"
	local f = io.popen( cmd )
	local cmdresult = f:read("*l")
	if (cmdresult) and (#cmdresult > 0) then
		cmd_output_result = string.match(cmdresult,"^%S*") or "Unknown"
	else
		cmd_output_error = "Program not installed"
	end	
	f:close()
	return cmd_output_result,cmd_output_error
end

local function autostarts()
	local cmd_output_result, cmd_output_error
	local cmd = "/sbin/rc_status | egrep '^S' | egrep '" .. processname .."' 2>/dev/null"
	local f = io.popen( cmd )
	local cmdresult = f:read("*a")
	if (cmdresult) and (#cmdresult > 0) then
		cmd_output_result = "Process will autostart at next boot (at sequence '" .. string.match(cmdresult,"^%a+(%d%d)") .. "')"
	else
		cmd_output_error = "Not programmed to autostart"
	end	
	f:close()
	return cmd_output_result,cmd_output_error
end

local function opennhrpctl_show()
	local cmd_output_result={}
	local cmd_output_result_table={}
	local cmd_output_error, opennhrpstatus
	local cmd = "/usr/sbin/opennhrpctl show 2>/dev/null"
	local f = io.popen( cmd )
	for line in f:lines() do
		if string.find(line, "^Status:") then
			opennhrpstatus=line
		else
			table.insert(cmd_output_result, line)
		end
	end
	f:close()
	local cnt = 0
	for k,v in pairs(cmd_output_result) do
		if string.find(v,"^Interface") then
			cnt = cnt + 1
			cmd_output_result_table[cnt] = {}
		end
		if ( cnt > 0 ) and (v ~= "") then
			local k = string.match(v,"^(.-):%s?.*")
			cmd_output_result_table[cnt][k]=cfe({value=string.match(v,"^.-:%s?(.*)")})
			local statusdescription = string.lower(string.match(v,"^.-:%s?(.*)"))
			if (type(descr[k]) == "table") then
				cmd_output_result_table[cnt][k]['descr']=descr[k][statusdescription]
			end
		end
	end

	local peers_list = {}
	for k,v in pairs(cmd_output_result_table) do
		if (v.Interface.value) and not (peers_list[v.Interface.value]) then
			peers_list[v.Interface.value] = {}
		end
		table.insert(peers_list[v.Interface.value], v)
	end

	return peers_list,opennhrpstatus,cmd_output_error
end


function process_status_text(procname)
	local t = procps.pidof(procname)
	if (t) and (#t > 0) then
		return "Enabled"
	else
		return "Disabled"
	end
end

-- ################################################################################
-- PUBLIC FUNCTIONS

function startstop_service ( self, action )
	local cmd = action.value
	local cmdresult,cmdmessage,cmderror,cmdaction = daemoncontrol.daemoncontrol(processname, cmd)
	action.descr=cmdmessage
	action.errtxt=cmderror
	-- Reporting back (true|false, the original acition)
	return cmdresult,action
end

function getstatus()
	local status = {}
	local value, errtxt = get_version()
	status.version = cfe({ name = "version",
		label="Program version",
		value=value,
		errtxt=errtxt,
		 })

	status.status = cfe({ name="status",
		label="Program status",
		value=process_status_text(processname),
		})
	local autostart_sequense, autostart_errtxt = autostarts()
	status.autostart = cfe({ name="autostart",
		label="Autostart sequence",
		value=autostart_sequense,
		errtxt=autostart_errtxt,
		})

	local opennhrpctl_show, opennhrpctl_status = opennhrpctl_show()
	status.stats = cfe({ name="stats",
		label="Programstatus reports",
		value=opennhrpctl_status,
		})

	status.show = cfe({ name="show",
		label="Peers",
		option=opennhrpctl_show,
		})

	return status
end

function get_filedetails()
	local path = configfile
	local filedetails = fs.stat(path)
	local file = {}

	file["filename"] = cfe({ 
		name="filename",
		label="File name",
		value=path,
		})
	file["filesize"] = cfe({ 
		name="filesize",
		label="File size",
		value=filedetails.size or 0,
		})
	file["mtime"] = cfe({ 
		name="mtime",
		label="File date",
		value=filedetails.mtime or "---",
		})
	file["filecontent"] = cfe({ 
		type="longtext",
		name="filecontent",
		label="File content",
		value=fs.read_file(path),
		})
	return file
end
function update_filecontent (self, modifications)
	local path = configfile
	local file_result,err = fs.write_file(path, format.dostounix(modifications))
	return file_result
end
function get_logfile ()
	local file = {}
	local cmdtxt = "cat /var/log/messages | grep " .. processname
	local cmd, error = io.popen(cmdtxt ,r)
	local cmdoutput = cmd:read("*a")
	cmd:close()

	file["filename"] = cfe({ 
		name="filename",
		label="File name",
		value=cmdtxt,
		})

	file["filecontent"] = cfe({ 
		type="longtext",
		name="filecontent",
		label="File content",
		value=cmdoutput,
		})

	return file
end