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|
-- weather widget type fetching from from US NOAA
-- Copyright (C) 2010 Adrian C. <anrxc@sysphere.org>
-- Copyright (C) 2017 mutlusun <mutlusun@github.com>
-- Copyright (C) 2019 Arthur Axel 'fREW' Schmidt <git@frew.co>
-- Copyright (C) 2019 Nguyễn Gia Phong <vn.mcsinyx@gmail.com>
--
-- This file is part of Vicious.
--
-- Vicious is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as
-- published by the Free Software Foundation, either version 2 of the
-- License, or (at your option) any later version.
--
-- Vicious is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with Vicious. If not, see <https://www.gnu.org/licenses/>.
-- {{{ Grab environment
local tonumber = tonumber
local math = { ceil = math.ceil }
local os = { date = os.date, difftime = os.difftime, time = os.time }
local string = { format = string.format }
local spawn = require"vicious.spawn"
local helpers = require"vicious.helpers"
-- }}}
-- Weather: provides weather information for a requested station
-- vicious.widgets.weather
local weather_all = {}
-- copied from http://lua-users.org/wiki/TimeZone
local function get_timezone_offset()
local ts = os.time()
local utcdate = os.date("!*t", ts)
local localdate = os.date("*t", ts)
localdate.isdst = false -- this is the trick
return os.difftime(os.time(localdate), os.time(utcdate))
end
-- {{{ Weather widget type
local function parse(stdout, stderr, exitreason, exitcode)
-- Initialize function tables
local _weather = {
["{city}"] = "N/A",
["{when}"] = "N/A",
["{wind}"] = "N/A",
["{windmph}"] = "N/A",
["{windkmh}"] = "N/A",
["{sky}"] = "N/A",
["{weather}"] = "N/A",
["{tempf}"] = "N/A",
["{tempc}"] = "N/A",
["{dewf}"] = "N/A",
["{dewc}"] = "N/A",
["{humid}"] = "N/A",
["{press}"] = "N/A"
}
-- Check if there was a timeout or a problem with the station
if stdout == '' then return _weather end
_weather["{city}"] = -- City and/or area
stdout:match"^(.+)%,.*%([%u]+%)"
or _weather["{city}"]
_weather["{wind}"] = -- Wind direction and degrees if available
stdout:match"Wind:[%s][%a]+[%s][%a]+[%s](.+)[%s]at.+$"
or _weather["{wind}"]
_weather["{windmph}"] = -- Wind speed in MPH if available
stdout:match"Wind:[%s].+[%s]at[%s]([%d]+)[%s]MPH"
or _weather["{windmph}"]
_weather["{sky}"] = -- Sky conditions if available
stdout:match"Sky[%s]conditions:[%s](.-)[%c]"
or _weather["{sky}"]
_weather["{weather}"] = -- Weather conditions if available
stdout:match"Weather:[%s](.-)[%c]"
or _weather["{weather}"]
_weather["{tempf}"] = -- Temperature in fahrenheit
stdout:match"Temperature:[%s]([%-]?[%d%.]+).*[%c]"
or _weather["{tempf}"]
_weather["{dewf}"] = -- Dew Point in fahrenheit
stdout:match"Dew[%s]Point:[%s]([%-]?[%d%.]+).*[%c]"
or _weather["{dewf}"]
_weather["{humid}"] = -- Relative humidity in percent
stdout:match"Relative[%s]Humidity:[%s]([%d]+)%%"
or _weather["{humid}"]
_weather["{press}"] = -- Pressure in hPa
stdout:match"Pressure[%s].+%((.+)[%s]hPa%)"
or _weather["{press}"]
local year, month, day, hour, min =
stdout:match"(%d%d%d%d).(%d%d).(%d%d) (%d%d)(%d%d) UTC"
if year ~= nil then
local utctable = { year = year, month = month, day = day,
hour = hour, min = min }
_weather["{when}"] = os.time(utctable) + get_timezone_offset()
end
-- Wind speed in km/h if MPH was available
if _weather["{windmph}"] ~= "N/A" then
_weather["{windmph}"] = tonumber(_weather["{windmph}"])
_weather["{windkmh}"] = math.ceil(_weather["{windmph}"] * 1.6)
end -- Temperature in °C if °F was available
if _weather["{tempf}"] ~= "N/A" then
_weather["{tempf}"] = tonumber(_weather["{tempf}"])
_weather["{tempc}"] = math.ceil((_weather["{tempf}"] - 32) * 5/9)
end -- Dew Point in °C if °F was available
if _weather["{dewf}"] ~= "N/A" then
_weather["{dewf}"] = tonumber(_weather["{dewf}"])
_weather["{dewc}"] = math.ceil((_weather["{dewf}"] - 32) * 5/9)
end -- Capitalize some stats so they don't look so out of place
if _weather["{sky}"] ~= "N/A" then
_weather["{sky}"] = helpers.capitalize(_weather["{sky}"])
end
if _weather["{weather}"] ~= "N/A" then
_weather["{weather}"] = helpers.capitalize(_weather["{weather}"])
end
return _weather
end
function weather_all.async(format, warg, callback)
if not warg then return callback{} end
-- Get weather forceast by the station ICAO code, from:
-- * US National Oceanic and Atmospheric Administration
local url = string.format(
"https://tgftp.nws.noaa.gov/data/observations/metar/decoded/%s.TXT",
warg)
spawn.easy_async("curl -fs " .. url,
function (...) callback(parse(...)) end)
end
-- }}}
return helpers.setasyncall(weather_all)
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