95 lines
3.7 KiB
Lua
95 lines
3.7 KiB
Lua
---------------------------------------------------
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-- Licensed under the GNU General Public License v2
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-- * (c) 2010, Adrian C. <anrxc@sysphere.org>
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---------------------------------------------------
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-- {{{ Grab environment
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local tonumber = tonumber
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local io = { popen = io.popen }
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local setmetatable = setmetatable
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local math = { ceil = math.ceil }
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local string = { match = string.match }
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local helpers = require("vicious.helpers")
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-- }}}
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-- Weather: provides weather information for a requested station
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-- vicious.widgets.weather
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local weather = {}
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-- Initialize function tables
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local _weather = {
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["{city}"] = "N/A",
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["{wind}"] = "N/A",
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["{windmph}"] = "N/A",
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["{windkmh}"] = "N/A",
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["{sky}"] = "N/A",
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["{weather}"] = "N/A",
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["{tempf}"] = "N/A",
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["{tempc}"] = "N/A",
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["{dewf}"] = "N/A",
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["{dewc}"] = "N/A",
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["{humid}"] = "N/A",
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["{press}"] = "N/A"
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}
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-- {{{ Weather widget type
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local function worker(format, warg)
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if not warg then return end
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-- Get weather forceast by the station ICAO code, from:
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-- * US National Oceanic and Atmospheric Administration
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local url = "http://weather.noaa.gov/pub/data/observations/metar/decoded/"..warg
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local f = io.popen("curl --connect-timeout 1 -fsm 3 "..helpers.shellquote(url)..".TXT")
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local ws = f:read("*all")
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f:close()
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-- Check if there was a timeout or a problem with the station
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if ws == nil then return _weather end
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_weather["{city}"] = -- City and/or area
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string.match(ws, "^(.+)%,.*%([%u]+%)") or _weather["{city}"]
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_weather["{wind}"] = -- Wind direction and degrees if available
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string.match(ws, "Wind:[%s][%a]+[%s][%a]+[%s](.+)[%s]at.+$") or _weather["{wind}"]
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_weather["{windmph}"] = -- Wind speed in MPH if available
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string.match(ws, "Wind:[%s].+[%s]at[%s]([%d]+)[%s]MPH") or _weather["{windmph}"]
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_weather["{sky}"] = -- Sky conditions if available
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string.match(ws, "Sky[%s]conditions:[%s](.-)[%c]") or _weather["{sky}"]
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_weather["{weather}"] = -- Weather conditions if available
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string.match(ws, "Weather:[%s](.-)[%c]") or _weather["{weather}"]
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_weather["{tempf}"] = -- Temperature in fahrenheit
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string.match(ws, "Temperature:[%s]([%-]?[%d%.]+).*[%c]") or _weather["{tempf}"]
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_weather["{dewf}"] = -- Dew Point in fahrenheit
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string.match(ws, "Dew[%s]Point:[%s]([%-]?[%d%.]+).*[%c]") or _weather["{dewf}"]
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_weather["{humid}"] = -- Relative humidity in percent
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string.match(ws, "Relative[%s]Humidity:[%s]([%d]+)%%") or _weather["{humid}"]
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_weather["{press}"] = -- Pressure in hPa
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string.match(ws, "Pressure[%s].+%((.+)[%s]hPa%)") or _weather["{press}"]
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-- Wind speed in km/h if MPH was available
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if _weather["{windmph}"] ~= "N/A" then
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_weather["{windmph}"] = tonumber(_weather["{windmph}"])
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_weather["{windkmh}"] = math.ceil(_weather["{windmph}"] * 1.6)
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end -- Temperature in °C if °F was available
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if _weather["{tempf}"] ~= "N/A" then
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_weather["{tempf}"] = tonumber(_weather["{tempf}"])
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_weather["{tempc}"] = math.ceil((_weather["{tempf}"] - 32) * 5/9)
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end -- Dew Point in °C if °F was available
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if _weather["{dewf}"] ~= "N/A" then
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_weather["{dewf}"] = tonumber(_weather["{dewf}"])
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_weather["{dewc}"] = math.ceil((_weather["{dewf}"] - 32) * 5/9)
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end -- Capitalize some stats so they don't look so out of place
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if _weather["{sky}"] ~= "N/A" then
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_weather["{sky}"] = helpers.capitalize(_weather["{sky}"])
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end
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if _weather["{weather}"] ~= "N/A" then
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_weather["{weather}"] = helpers.capitalize(_weather["{weather}"])
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end
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return _weather
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end
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-- }}}
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return setmetatable(weather, { __call = function(_, ...) return worker(...) end })
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