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-- Licensed to the public under the Apache License 2.0.

local ip       = require("luci.ip")
local fs       = require("nixio.fs")
local util     = require("luci.util")
local uci      = require("luci.model.uci").cursor()
local cfg_file = uci:get("openvpn", arg[1], "config")

local m = Map("openvpn")

local p = m:section( SimpleSection )
p.template = "openvpn/pageswitch"
p.mode     = "file"
p.instance = arg[1]

if not cfg_file or not fs.access(cfg_file) then
	local f = SimpleForm("error", nil, translatef("The OVPN config file (%s) could not be found, please check your configuration.", cfg_file or "n/a"))
	f:append(Template("openvpn/ovpn_css"))
	f.reset = false
	f.submit = false
	return m, f
end

if fs.stat(cfg_file).size >= 102400 then
	f = SimpleForm("error", nil,
		translatef("The size of the OVPN config file (%s) is too large for online editing in LuCI (≥ 100 KB). ", cfg_file)
		.. translate("Please edit this file directly in a terminal session."))
	f:append(Template("openvpn/ovpn_css"))
	f.reset = false
	f.submit = false
	return m, f
end

f = SimpleForm("cfg", nil)
f:append(Template("openvpn/ovpn_css"))
f.submit = translate("Save")
f.reset = false

s = f:section(SimpleSection, nil, translatef("This form allows you to modify the content of the OVPN config file (%s). ", cfg_file))
file = s:option(TextValue, "data")
file.datatype = "string"
file.rows = 20
file.rmempty = true

function file.cfgvalue()
	return fs.readfile(cfg_file) or ""
end

function file.write(self, section, data)
	return fs.writefile(cfg_file, "\n" .. util.trim(data:gsub("\r\n", "\n")) .. "\n")
end

function file.remove(self, section, value)
	return fs.writefile(cfg_file, "")
end

function s.handle(self, state, data)
	return true
end

return m, f