]> git.madduck.net Git - etc/awesome.git/blob - widgets/weather.lua

madduck's git repository

Every one of the projects in this repository is available at the canonical URL git://git.madduck.net/madduck/pub/<projectpath> — see each project's metadata for the exact URL.

All patches and comments are welcome. Please squash your changes to logical commits before using git-format-patch and git-send-email to patches@git.madduck.net. If you'd read over the Git project's submission guidelines and adhered to them, I'd be especially grateful.

SSH access, as well as push access can be individually arranged.

If you use my repositories frequently, consider adding the following snippet to ~/.gitconfig and using the third clone URL listed for each project:

[url "git://git.madduck.net/madduck/"]
  insteadOf = madduck:

calendar: fix indentation
[etc/awesome.git] / widgets / weather.lua
1
2 --[[
3                                                   
4      Licensed under GNU General Public License v2 
5       * (c) 2015, Luke Bonham                     
6                                                   
7 --]]
8
9 local newtimer     = require("lain.helpers").newtimer
10 local read_pipe    = require("lain.helpers").read_pipe
11
12 local async        = require("lain.asyncshell")
13 local json         = require("lain.util").dkjson
14 local lain_icons   = require("lain.helpers").icons_dir
15
16 local naughty      = require("naughty")
17 local wibox        = require("wibox")
18
19 local math         = { floor  = math.floor }
20 local mouse        = mouse
21 local string       = { format = string.format,
22                        gsub   = string.gsub }
23
24 local setmetatable = setmetatable
25
26 -- OpenWeatherMap
27 -- current weather and X-days forecast
28 -- lain.widgets.weather
29
30 local function worker(args)
31     local weather               = {}
32     local args                  = args or {}
33     local APPID                 = args.APPID or "3e321f9414eaedbfab34983bda77a66e" -- lain default
34     local timeout               = args.timeout or 900   -- 15 min
35     local timeout_forecast      = args.timeout or 86400 -- 24 hrs
36     local current_call          = args.current_call  or "curl -s 'http://api.openweathermap.org/data/2.5/weather?id=%s&units=%s&lang=%s&APPID=%s'"
37     local forecast_call         = args.forecast_call or "curl -s 'http://api.openweathermap.org/data/2.5/forecast/daily?id=%s&units=%s&lang=%s&cnt=%s&APPID=%s'"
38     local city_id               = args.city_id or 0 -- placeholder
39     local units                 = args.units or "metric"
40     local lang                  = args.lang or "en"
41     local cnt                   = args.cnt or 5
42     local date_cmd              = args.date_cmd or "date -u -d @%d +'%%a %%d'"
43     local icons_path            = args.icons_path or lain_icons .. "openweathermap/"
44     local notification_preset   = args.notification_preset or {}
45     local notification_text_fun = args.notification_text_fun or
46                                   function (wn)
47                                       local day = string.gsub(read_pipe(string.format(date_cmd, wn["dt"])), "\n", "")
48                                       local tmin = math.floor(wn["temp"]["min"])
49                                       local tmax = math.floor(wn["temp"]["max"])
50                                       local desc = wn["weather"][1]["description"]
51
52                                       return string.format("<b>%s</b>: %s, %d - %d ", day, desc, tmin, tmax)
53                                   end
54     local weather_na_markup     = args.weather_na_markup or " N/A "
55     local followmouse           = args.followmouse or false
56     local settings              = args.settings or function() end
57
58     weather.widget    = wibox.widget.textbox(weather_na_markup)
59     weather.icon_path = icons_path .. "na.png"
60     weather.icon      = wibox.widget.imagebox(weather.icon_path)
61
62     function weather.show(t_out)
63         weather.hide()
64
65         if followmouse then
66             notification_preset.screen = mouse.screen
67         end
68
69         if not weather.notification_text then
70             weather.forecast_update()
71         end
72
73         weather.notification = naughty.notify({
74             text    = weather.notification_text,
75             icon    = weather.icon_path,
76             timeout = t_out,
77             preset  = notification_preset
78         })
79     end
80
81     function weather.hide()
82         if weather.notification then
83             naughty.destroy(weather.notification)
84             weather.notification = nil
85         end
86     end
87
88     function weather.attach(obj)
89         obj:connect_signal("mouse::enter", function()
90             weather.show(0)
91         end)
92         obj:connect_signal("mouse::leave", function()
93             weather.hide()
94         end)
95     end
96
97     function weather.forecast_update()
98         local cmd = string.format(forecast_call, city_id, units, lang, cnt, APPID)
99         async.request(cmd, function(f)
100             local pos, err
101             weather_now, pos, err = json.decode(f, 1, nil)
102
103             if not err and weather_now and tonumber(weather_now["cod"]) == 200 then
104                 weather.notification_text = ''
105                 for i = 1, weather_now["cnt"] do
106                     weather.notification_text = weather.notification_text ..
107                                                 notification_text_fun(weather_now["list"][i])
108
109                     if i < weather_now["cnt"] then
110                         weather.notification_text = weather.notification_text .. "\n"
111                     end
112                 end
113             end
114         end)
115     end
116
117     function weather.update()
118         local cmd = string.format(current_call, city_id, units, lang, APPID)
119         async.request(cmd, function(f)
120             local pos, err
121             weather_now, pos, err = json.decode(f, 1, nil)
122
123             if not err and weather_now and tonumber(weather_now["cod"]) == 200 then
124                 weather.icon_path = icons_path .. weather_now["weather"][1]["icon"] .. ".png"
125                 widget = weather.widget
126                 settings()
127             else
128                 weather.icon_path = icons_path .. "na.png"
129                 weather.widget:set_markup(weather_na_markup)
130             end
131
132             weather.icon:set_image(weather.icon_path)
133         end)
134     end
135
136     weather.attach(weather.widget)
137
138     newtimer("weather-" .. city_id, timeout, weather.update)
139     newtimer("weather_forecast-" .. city_id, timeout, weather.forecast_update)
140
141     return setmetatable(weather, { __index = weather.widget })
142 end
143
144 return setmetatable({}, { __call = function(_, ...) return worker(...) end })