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--[[
Licensed under GNU General Public License v2
* (c) 2015, Luke Bonham
--]]
local newtimer = require("lain.helpers").newtimer
local async = require("lain.asyncshell")
local json = require("lain.util").dkjson
local lain_icons = require("lain.helpers").icons_dir
local naughty = require("naughty")
local wibox = require("wibox")
local math = { floor = math.floor }
local string = { format = string.format,
gsub = string.gsub }
local setmetatable = setmetatable
-- OpenWeatherMap
-- current weather and X-days forecast
-- lain.widgets.weather
local function worker(args)
local weather = {}
local args = args or {}
local timeout = args.timeout or 900 -- 15 min
local timeout_forecast = args.timeout or 86400 -- 24 hrs
local current_call = "curl -s 'http://api.openweathermap.org/data/2.5/weather?id=%s&units=%s&lang=%s'"
local forecast_call = "curl -s 'http://api.openweathermap.org/data/2.5/forecast/daily?id=%s&units=%s&lang=%s&cnt=%s'"
local city_id = args.city_id or 0 -- placeholder
local units = args.units or "metric"
local lang = args.lang or "en"
local cnt = args.cnt or 7
local date_cmd = args.date_cmd or "date -u -d @%d +'%%a %%d'"
local icons_path = args.icons_path or lain_icons .. "openweathermap/"
local w_notification_preset = args.w_notification_preset or {}
local settings = args.settings or function() end
weather.widget = wibox.widget.textbox('')
weather.icon = wibox.widget.imagebox()
function weather.show(t_out)
weather.hide()
weather.notification = naughty.notify({
text = weather.notification_text,
icon = weather.icon_path,
timeout = t_out,
preset = w_notification_preset
})
end
function weather.hide()
if weather.notification ~= nil then
naughty.destroy(weather.notification)
weather.notification = nil
end
end
function weather.attach(obj)
obj:connect_signal("mouse::enter", function()
weather.show(0)
end)
obj:connect_signal("mouse::leave", function()
weather.hide()
end)
end
function weather.forecast_update()
local cmd = string.format(forecast_call, city_id, units, lang, cnt)
async.request(cmd, function(f)
j = f:read("*a")
f:close()
weather_now, pos, err = json.decode(j, 1, nil)
if not err and weather_now ~= nil and tonumber(weather_now["cod"]) == 200 then
weather.notification_text = ''
for i = 1, weather_now["cnt"] do
local f = assert(io.popen(string.format(date_cmd, weather_now["list"][i]["dt"])))
day = string.gsub(f:read("a"), "\n", "")
f:close()
tmin = math.floor(weather_now["list"][i]["temp"]["min"])
tmax = math.floor(weather_now["list"][i]["temp"]["max"])
desc = weather_now["list"][i]["weather"][1]["description"]
weather.notification_text = weather.notification_text ..
string.format("<b>%s</b>: %s, %d - %d ", day, desc, tmin, tmax)
if i < weather_now["cnt"] then
weather.notification_text = weather.notification_text .. "\n"
end
end
else
weather.icon_path = icons_path .. "na.png"
weather.notification_text = "API/connection error or bad/not set city ID"
end
end)
end
function weather.update()
local cmd = string.format(current_call, city_id, units, lang)
async.request(cmd, function(f)
j = f:read("*a")
f:close()
weather_now, pos, err = json.decode(j, 1, nil)
if not err and weather_now ~= nil and tonumber(weather_now["cod"]) == 200 then
weather.icon_path = icons_path .. weather_now["weather"][1]["icon"] .. ".png"
weather.icon:set_image(weather.icon_path)
widget = weather.widget
settings()
else
weather.widget._layout.text = " N/A " -- tries to avoid textbox bugs
weather.icon:set_image(icons_path .. "na.png")
end
end)
end
weather.attach(weather.widget)
newtimer("weather", timeout, weather.update)
newtimer("weather_forecast", timeout, weather.forecast_update)
return setmetatable(weather, { __index = weather.widget })
end
return setmetatable({}, { __call = function(_, ...) return worker(...) end })
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