95 lines
3.3 KiB
Lua
95 lines
3.3 KiB
Lua
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---------------------------------------------------
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-- Licensed under the GNU General Public License v2
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-- * (c) 2013, NormalRa <normalrawr gmail com>
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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 string = { match = string.match }
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local math = {
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ceil = math.ceil,
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floor = math.floor
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}
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-- }}}
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-- Openweather: provides weather information for a requested station
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-- vicious.widgets.openweather
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local openweather = {}
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-- Initialize function tables
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local _wdirs = { "N", "NE", "E", "SE", "S", "SW", "W", "NW", "N" }
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local _wdata = {
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["{city}"] = "N/A",
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["{wind deg}"] = "N/A",
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["{wind aim}"] = "N/A",
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["{wind mps}"] = "N/A",
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["{wind kmh}"] = "N/A",
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["{sky}"] = "N/A",
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["{weather}"] = "N/A",
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["{temp c}"] = "N/A",
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["{humid}"] = "N/A",
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["{press}"] = "N/A"
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}
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-- {{{ Openweather 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 using the city ID code, from:
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-- * OpenWeatherMap.org
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local openweather = "http://api.openweathermap.org/data/2.5/weather?id="..warg.."&mode=json&units=metric"
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local f = io.popen("curl --connect-timeout 1 -fsm 3 '"..openweather.."'")
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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 _wdata end
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_wdata["{city}"] = -- City name
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string.match(ws, '"name":"([%a%s%-]+)"') or _wdata["{city}"]
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_wdata["{wind deg}"] = -- Wind degrees
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string.match(ws, '"deg":([%d]+)') or _wdata["{wind deg}"]
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_wdata["{wind mps}"] = -- Wind speed in meters per second
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string.match(ws, '"speed":([%d%.]+)') or _wdata["{wind mps}"]
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_wdata["{sky}"] = -- Sky conditions
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string.match(ws, '"main":"([%a]+)"') or _wdata["{sky}"]
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_wdata["{weather}"] = -- Weather description
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string.match(ws, '"description":"([%a%s]+)"') or _wdata["{weather}"]
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_wdata["{temp c}"] = -- Temperature in celsius
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string.match(ws, '"temp":([%-]?[%d%.]+)') or _wdata["{temp c}"]
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_wdata["{humid}"] = -- Relative humidity in percent
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string.match(ws, '"humidity":([%d]+)') or _wdata["{humid}"]
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_wdata["{press}"] = -- Pressure in hPa
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string.match(ws, '"pressure":([%d%.]+)') or _wdata["{press}"]
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-- Wind speed in km/h
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if _wdata["{wind mps}"] ~= "N/A" then
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_wdata["{wind mps}"] = math.floor(tonumber(_wdata["{wind mps}"]) + .5)
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_wdata["{wind kmh}"] = math.ceil(_wdata["{wind mps}"] * 3.6)
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end -- Temperature in °C
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if _wdata["{temp c}"] ~= "N/A" then
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_wdata["{temp c}"] = math.floor(tonumber(_wdata["{temp c}"]) + .5)
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end -- Calculate wind direction
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if _wdata["{wind deg}"] ~= "N/A" then
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_wdata["{wind deg}"] = tonumber(_wdata["{wind deg}"])
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-- Lua tables start at [1]
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if (_wdata["{wind deg}"] / 45)%1 == 0 then
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_wdata["{wind aim}"] = _wdirs[_wdata["{wind deg}"] / 45 + 1]
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else
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_wdata["{wind aim}"] =
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_wdirs[math.ceil(_wdata["{wind deg}"] / 45) + 1]..
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_wdirs[math.floor(_wdata["{wind deg}"] / 45) + 1]
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end
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end
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return _wdata
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end
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-- }}}
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return setmetatable(openweather, { __call = function(_, ...) return worker(...) end })
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