228 lines
7.6 KiB
Lua
228 lines
7.6 KiB
Lua
-------------------------------------------------
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-- Weather Widget based on the OpenWeatherMap
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-- https://openweathermap.org/
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--
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-- @author Pavel Makhov
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-- @copyright 2018 Pavel Makhov
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-------------------------------------------------
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local socket = require("socket")
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local http = require("socket.http")
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local ltn12 = require("ltn12")
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local json = require("json")
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local naughty = require("naughty")
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local wibox = require("wibox")
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local gears = require("gears")
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local path_to_icons = "/usr/share/icons/Arc/status/symbolic/"
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local weather_widget = {}
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local function worker(args)
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local args = args or {}
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local font = args.font or 'Play 9'
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local city = args.city or 'Montreal,ca'
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local api_key = args.api_key or naughty.notify{preset = naughty.config.presets.critical, text = 'OpenweatherMap API key is not set'}
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local units = args.units or 'metric'
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local both_units_widget = args.both_units_widget or false
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local both_units_popup = args.both_units_popup or false
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local position = args.notification_position or "top_right"
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local weather_api_url = (
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'https://api.openweathermap.org/data/2.5/weather'
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.. '?q=' .. city
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.. '&appid=' .. api_key
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.. '&units=' .. units
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)
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local icon_widget = wibox.widget {
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{
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id = "icon",
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resize = false,
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widget = wibox.widget.imagebox,
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},
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layout = wibox.container.margin(_, 0, 0, 3),
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set_image = function(self, path)
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self.icon.image = path
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end,
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}
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local temp_widget = wibox.widget {
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font = font,
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widget = wibox.widget.textbox,
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}
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weather_widget = wibox.widget {
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icon_widget,
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temp_widget,
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layout = wibox.layout.fixed.horizontal,
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}
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--- Maps openWeatherMap icons to Arc icons
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local icon_map = {
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["01d"] = "weather-clear-symbolic.svg",
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["02d"] = "weather-few-clouds-symbolic.svg",
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["03d"] = "weather-clouds-symbolic.svg",
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["04d"] = "weather-overcast-symbolic.svg",
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["09d"] = "weather-showers-scattered-symbolic.svg",
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["10d"] = "weather-showers-symbolic.svg",
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["11d"] = "weather-storm-symbolic.svg",
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["13d"] = "weather-snow-symbolic.svg",
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["50d"] = "weather-fog-symbolic.svg",
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["01n"] = "weather-clear-night-symbolic.svg",
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["02n"] = "weather-few-clouds-night-symbolic.svg",
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["03n"] = "weather-clouds-night-symbolic.svg",
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["04n"] = "weather-overcast-symbolic.svg",
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["09n"] = "weather-showers-scattered-symbolic.svg",
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["10n"] = "weather-showers-symbolic.svg",
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["11n"] = "weather-storm-symbolic.svg",
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["13n"] = "weather-snow-symbolic.svg",
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["50n"] = "weather-fog-symbolic.svg"
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}
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--- Return wind direction as a string.
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local function to_direction(degrees)
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-- Ref: https://www.campbellsci.eu/blog/convert-wind-directions
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if degrees == nil then
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return "Unknown dir"
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end
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local directions = {
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"N",
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"NNE",
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"NE",
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"ENE",
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"E",
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"ESE",
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"SE",
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"SSE",
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"S",
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"SSW",
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"SW",
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"WSW",
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"W",
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"WNW",
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"NW",
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"NNW",
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"N",
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}
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return directions[math.floor((degrees % 360) / 22.5) + 1]
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end
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-- Convert degrees Celsius to Fahrenheit
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local function celsius_to_fahrenheit(c)
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return c*9/5+32
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end
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-- Convert degrees Fahrenheit to Celsius
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local function fahrenheit_to_celsius(f)
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return (f-32)*5/9
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end
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local weather_timer = gears.timer({ timeout = 60 })
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local resp
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local function gen_temperature_str(temp, fmt_str, show_other_units)
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local temp_str = string.format(fmt_str, temp)
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local s = temp_str .. '°' .. (units == 'metric' and 'C' or 'F')
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if (show_other_units) then
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local temp_conv, units_conv
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if (units == 'metric') then
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temp_conv = celsius_to_fahrenheit(temp)
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units_conv = 'F'
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else
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temp_conv = fahrenheit_to_celsius(temp)
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units_conv = 'C'
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end
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local temp_conv_str = string.format(fmt_str, temp_conv)
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s = s .. ' ' .. '('.. temp_conv_str .. '°' .. units_conv .. ')'
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end
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return s
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end
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local function error_display(resp_json)
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weather_timer.timeout = math.min(15 * 60, weather_timer.timeout * 2)
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weather_timer:again()
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local err_resp = json.decode(resp_json)
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naughty.notify{
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title = 'Weather Widget Error',
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text = err_resp.message,
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preset = naughty.config.presets.critical,
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}
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end
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weather_timer:connect_signal("timeout", function ()
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local resp_json = {}
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local res, status = http.request{
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url=weather_api_url,
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sink=ltn12.sink.table(resp_json),
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-- ref:
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-- http://w3.impa.br/~diego/software/luasocket/old/luasocket-2.0/http.html
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create=function()
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-- ref: https://stackoverflow.com/a/6021774/595220
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local req_sock = socket.tcp()
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-- 't' — overall timeout
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req_sock:settimeout(0.2, 't')
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-- 'b' — block timeout
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req_sock:settimeout(0.001, 'b')
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return req_sock
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end
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}
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if (resp_json ~= nil) then
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resp_json = table.concat(resp_json)
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end
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if (status ~= 200 and resp_json ~= nil and resp_json ~= '') then
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if (not pcall(error_display, resp_json)) then
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naughty.notify{
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title = 'Weather Widget Error',
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text = 'Cannot parse answer',
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preset = naughty.config.presets.critical,
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}
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end
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elseif (resp_json ~= nil and resp_json ~= '') then
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resp = json.decode(resp_json)
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icon_widget.image = path_to_icons .. icon_map[resp.weather[1].icon]
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temp_widget:set_text(gen_temperature_str(resp.main.temp, '%.0f', both_units_widget))
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weather_timer.timeout = 60
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weather_timer:again()
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end
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end)
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weather_timer:start()
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weather_timer:emit_signal("timeout")
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--- Notification with weather information. Popups when mouse hovers over the icon
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local notification
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weather_widget:connect_signal("mouse::enter", function()
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notification = naughty.notify{
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icon = path_to_icons .. icon_map[resp.weather[1].icon],
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icon_size=20,
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text =
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'<big>' .. resp.weather[1].main .. ' (' .. resp.weather[1].description .. ')</big><br>' ..
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'<b>Humidity:</b> ' .. resp.main.humidity .. '%<br>' ..
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'<b>Temperature:</b> ' .. gen_temperature_str(resp.main.temp, '%.1f',
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both_units_popup) .. '<br>' ..
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'<b>Pressure:</b> ' .. resp.main.pressure .. 'hPa<br>' ..
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'<b>Clouds:</b> ' .. resp.clouds.all .. '%<br>' ..
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'<b>Wind:</b> ' .. resp.wind.speed .. 'm/s (' .. to_direction(resp.wind.deg) .. ')',
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timeout = 5, hover_timeout = 10,
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position = position,
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screen = mouse.screen,
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width = (both_units_popup == true and 210 or 200)
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}
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end)
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weather_widget:connect_signal("mouse::leave", function()
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naughty.destroy(notification)
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end)
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return weather_widget
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end
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return setmetatable(weather_widget, { __call = function(_, ...)
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return worker(...)
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end })
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