include'kernel.class'
local check=require'kernel.checker'
local dump=require'utils.serpent'.dump
local util=require'kernel.util'
class.Var()
local p=setmetatable({},{__mode='k'})
function Var:__init(file,opt)
	p[self]={}
	p[self].file=file
	local dir=loadreq.getDir(p[self].file)
	if not fs.exists(dir) then fs.makeDir(dir) end
	if not fs.exists(file) then self:setAll{} end
end

function Var:getAll()
    local f=io.open(p[self].file,'r')
    local s=f:read'*a'
    f:close()
	local t=loadstring(s)()
	return t
end

function Var:setAll(t)
    local f=io.open(p[self].file,'w')
    local s=f:write(dump(t))
    f:close()
end

function Var:__get(k)
    local t=self:getAll()
    if not t then t={} self:setAll(t) end
	return t[k]
end
function Var:__set(k,v)
	local t=self:getAll()
	t[k]=v
    self:setAll(t)
	return true
end
return Var