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module (..., package.seeall)

require("format")
require("date")
require("fs")

local ntpdconfig = "/etc/ntpd.conf"
local progname = "openntpd"

local function config_content( f )
	local config = {}
	config.name = f
	local conf_file = fs.read_file_as_array ( config.name )
	for i=1,table.maxn(conf_file) do
		local l = conf_file[i]
		-- Filter out commented lines
		if not string.find ( l, "^[;#].*" ) then
			local a,b,c = string.match ( l, "^%s*(%S+)%s*(%S*)%s*(%S*).*$" )
			if (a) then
				if not (config[string.lower(a)]) then
					config[string.lower(a)] = {}
				end
				if (string.lower(a) == "listen") then
					table.insert (config[string.lower(a)], {value=c} )
				else
					table.insert (config[string.lower(a)], {value=b} )
				end
			end
		end
	end
	return config
end

local function file_info ( path )
	require("posix")
	local filedetails = posix.stat(path)	
	filedetails["owner"]=rawget((posix.getpasswd(filedetails["uid"])),"name")
	filedetails["group"]=rawget((posix.getgroup(filedetails["gid"])),"name")
	filedetails["atimelong"]=os.date("%c", filedetails["atime"])
	filedetails["mtimelong"]=os.date("%c", filedetails["mtime"])
	filedetails["longname"]=path
	filedetails["name"]=basename(path)

	if ( filedetails["size"] > 1073741824 ) then
		filedetails["size"]=((filedetails["size"]/1073741824) - (filedetails["size"]/1073741824%0.1)) .. "G"
	elseif ( filedetails["size"] > 1048576 ) then
		filedetails["size"]=((filedetails["size"]/1048576) - (filedetails["size"]/1048576%0.1))  .. "M"
	elseif ( filedetails["size"] > 1024 ) then
		filedetails["size"]=((filedetails["size"]/1024) - (filedetails["size"]/1024%0.1)) .. "k"
	else
		filedetails["size"]=filedetails["size"]
	end
	return filedetails
end

local function get_version ()
	local f,error = io.popen("/sbin/apk_version -v -s openntpd")
	local programversion = f:read("*a")
	f:close()
	return programversion
end

local is_running = function( process )
	local statusreport = ""
	local pidofsx, error = io.popen("pidof " .. process ,r)
	local pidofs = format.string_to_table(" ", string.gsub(pidofsx:read("*a"), "\n", ""))
	pidofsx:close()
	if (table.maxn(pidofs) > 1) then
		statusreport = "Running"
	elseif (table.maxn(pidofs) == 1) then
		statusreport = "Unknown (Only 1 process running, this might be wrong)"
	else
		statusreport = "Stopped"
	end
	return statusreport
end

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

function startstop_service ( self, state )
	local status = {}
	local f,err = io.popen("/etc/init.d/ntpd " .. state)
	local config = f:read("*a")
	f:close()
	if (config == "") then
		config = "OK!"
	end
	status.status = "Command:" .. state .." Result:" ..config
	return status
end


function get ()
	local path = ntpdconfig
	if not (fs.is_file(path)) then
		local file_result,err = fs.write_file(path, "")
	end
	config = config_content ( path )
	config["version"] = string.match(get_version(), "^(%S*)" )
	config["status"] = is_running ("ntpd")
	config["date"] = os.date()
	config["timezone"] = date.what_tz()
	return config
end

function get_filecontent (self)
	local path = ntpdconfig
	file_content = nil
	if (fs.is_file(path)) then
		local filedetails = file_info(path)
		local file = io.open( path )
		local file_result = file:read("*a") or "unknown"
		file:close()
		file_content = {name=name, value=file_result, filedetails=filedetails}
	else
		file_content = {value="", errtxt="File is missing, but will be created when you save your new settings",filedetails={longname=path, size="0", mtimelong=""}}
	end 
	return file_content
end

function update_filecontent (self, modifications)
	local path = ntpdconfig
	local file_result,err = fs.write_file(path, format.dostounix(modifications))
	file_content = get_filecontent()
	return file_content
end