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