root/luci/trunk/libs/web/luasrc/cbi/datatypes.lua @ 6652

--[[

LuCI - Configuration Bind Interface - Datatype Tests
(c) 2010 Jo-Philipp Wich <xm@subsignal.org>

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

        http://www.apache.org/licenses/LICENSE-2.0

$Id$

]]--

local fs = require "nixio.fs"
local ip = require "luci.ip"
local math = require "math"
local util = require "luci.util"

local tonumber = tonumber

module "luci.cbi.datatypes"


function bool(val)
    if val == "1" or val == "yes" or val == "on" or val == "true" then
        return true
    elseif val == "0" or val == "no" or val == "off" or val == "false" then
        return true
    elseif val == "" or val == nil then
        return true
    end

    return false
end

function uinteger(val)
    local n = tonumber(val)
    if n ~= nil and math.floor(n) == n and n >= 0 then
        return true
    end

    return false
end

function integer(val)
    local n = tonumber(val)
    if n ~= nil and math.floor(n) == n then
        return true
    end

    return false
end

function ufloat(val)
    local n = tonumber(val)
    return ( n ~= nil and n >= 0 )
end

function float(val)
    return ( tonumber(val) ~= nil )
end

function ipaddr(val)
    return ip4addr(val) or ip6addr(val)
end

function ip4addr(val)
    if val then
        return ip.IPv4(val) and true or false
    end

    return false
end

function ip4prefix(val)
    val = tonumber(val)
    return ( val and val >= 0 and val <= 32 )
end

function ip6addr(val)
    if val then
        return ip.IPv6(val) and true or false
    end

    return false
end

function ip6prefix(val)
    val = tonumber(val)
    return ( val and val >= 0 and val <= 128 )
end

function port(val)
    val = tonumber(val)
    return ( val and val >= 1 and val <= 65535 )
end

function portrange(val)
    local p1, p2 = val:match("^(%d+)%-(%d+)$")
    if p1 and p2 and port(p1) and port(p2) then
        return true
    else
        return port(val)
    end
end

function macaddr(val)
    if val and val:match(
        "^[a-fA-F0-9]+:[a-fA-F0-9]+:[a-fA-F0-9]+:" ..
         "[a-fA-F0-9]+:[a-fA-F0-9]+:[a-fA-F0-9]+$"
    ) then
        local parts = util.split( val, ":" )

        for i = 1,6 do
            parts[i] = tonumber( parts[i], 16 )
            if parts[i] < 0 or parts[i] > 255 then
                return false
            end
        end

        return true
    end

    return false
end

function hostname(val)
    if val and val:match("[a-zA-Z0-9_][a-zA-Z0-9_%-%.]*") then
        return true -- XXX: ToDo: need better solution
    end

    return false
end

function host(val)
    return hostname(val) or ipaddr(val)
end

function wpakey(val)
    if #val == 64 then
        return (val:match("^[a-fA-F0-9]+$") ~= nil)
    else
        return (#val >= 8) and (#val <= 63)
    end
end

function wepkey(val)
    if val:sub(1, 2) == "s:" then
        val = val:sub(3)
    end

    if (#val == 10) or (#val == 26) then
        return (val:match("^[a-fA-F0-9]+$") ~= nil)
    else
        return (#val == 5) or (#val == 13)
    end
end

function string(val)
    return true     -- Everything qualifies as valid string
end

function directory( val, seen )
    local s = fs.stat(val)
    seen = seen or { }

    if s and not seen[s.ino] then
        seen[s.ino] = true
        if s.type == "dir" then
            return true
        elseif s.type == "lnk" then
            return directory( fs.readlink(val), seen )
        end
    end

    return false
end

function file( val, seen )
    local s = fs.stat(val)
    seen = seen or { }

    if s and not seen[s.ino] then
        seen[s.ino] = true
        if s.type == "reg" then
            return true
        elseif s.type == "lnk" then
            return file( fs.readlink(val), seen )
        end
    end

    return false
end

function device( val, seen )
    local s = fs.stat(val)
    seen = seen or { }

    if s and not seen[s.ino] then
        seen[s.ino] = true
        if s.type == "chr" or s.type == "blk" then
            return true
        elseif s.type == "lnk" then
            return device( fs.readlink(val), seen )
        end
    end

    return false
end

function uciname(val)
    return (val:match("^[a-zA-Z0-9_]+$") ~= nil)
end

function range(val, min, max)
    val = tonumber(val)
    min = tonumber(min)
    max = tonumber(max)

    if val ~= nil and min ~= nil and max ~= nil then
        return ((val >= min) and (val <= max))
    end

    return false
end