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----------------------------------------------------------
-- Licensed under the GNU General Public License version 2
-- * Copyright (C) 2009 Adrian C. <anrxc_sysphere_org>
----------------------------------------------------------
-- {{{ Grab environment
local io = { popen = io.popen }
local setmetatable = setmetatable
local math = { floor = math.floor }
local string = { match = string.match }
-- }}}
-- Weather: provides weather information for a requested station
module("vicious.weather")
-- {{{ Weather widget type
local function worker(format, station)
-- US National Oceanic and Atmospheric Administration
-- * ICAO codes: http://www.rap.ucar.edu/weather/surface/stations.txt
local noaa = "http://weather.noaa.gov/pub/data/observations/metar/decoded/"
-- Get info from a weather station
local f = io.popen("curl --connect-timeout 1 -fsm 3 "..noaa..station..".TXT")
local ws = f:read("*all")
f:close()
-- Default values
local weather = {
["{city}"] = "N/A",
["{wind}"] = "N/A",
["{windmph}"] = "N/A",
["{windkmh}"] = "N/A",
["{sky}"] = "N/A",
["{weather}"] = "N/A",
["{tempf}"] = "N/A",
["{tempc}"] = "N/A",
["{humid}"] = "N/A",
["{press}"] = "N/A"
}
-- Check if there was a timeout or a problem with the station
if ws == nil then
return weather
else
weather["{city}"] = -- City and/or area
string.match(ws, "^(.+)%,.*%([%u]+%)") or weather["{city}"]
weather["{wind}"] = -- Wind direction and degrees if available
string.match(ws, "Wind:[%s][%a]+[%s][%a]+[%s](.+)[%s]at.+$") or weather["{wind}"]
weather["{windmph}"] = -- Wind speed in MPH if available
string.match(ws, "Wind:[%s].+[%s]at[%s]([%d]+)[%s]MPH") or weather["{windmph}"]
weather["{sky}"] = -- Sky conditions if available
string.match(ws, "Sky[%s]conditions:[%s](.-)[%c]") or weather["{sky}"]
weather["{weather}"] = -- Weather conditions if available
string.match(ws, "Weather:[%s](.-)[%c]") or weather["{weather}"]
weather["{tempf}"] = -- Temperature in fahrenheit
string.match(ws, "Temperature:[%s]([%d%.]+).*[%c]") or weather["{tempf}"]
weather["{tempc}"] = -- Temperature in celsius
string.match(ws, "Temperature:[%s][%d%.]+[%s]F[%s]%(([%d%.]+)[%s]C%)[%c]") or weather["{tempc}"]
weather["{humid}"] = -- Relative humidity in percent
string.match(ws, "Relative[%s]Humidity:[%s]([%d]+)%%") or weather["{humid}"]
weather["{press}"] = -- Pressure in hPa
string.match(ws, "Pressure[%s].+%((.+)[%s]hPa%)") or weather["{press}"]
-- Wind speed in KMH if MPH was available
if weather["{windmph}"] ~= "N/A" then
weather["{windkmh}"] = math.floor(weather["{windmph}"] * 1.6)
end
end
return weather
end
-- }}}
setmetatable(_M, { __call = function(_, ...) return worker(...) end })
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