]> 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:

53ae8383d379a026166b6321b0a57aa9d92f7008
[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 async        = require("lain.asyncshell")
11 local json         = require("lain.util").dkjson
12 local lain_icons   = require("lain.helpers").icons_dir
13 local naughty      = require("naughty")
14 local wibox        = require("wibox")
15
16 local math         = { floor  = math.floor }
17 local string       = { format = string.format,
18                        gsub   = string.gsub }
19
20 local setmetatable = setmetatable
21
22 -- OpenWeatherMap
23 -- current weather and X-days forecast
24 -- lain.widgets.weather
25
26 local function worker(args)
27     local weather               = {}
28     local args                  = args or {}
29     local timeout               = args.timeout or 900   -- 15 min
30     local timeout_forecast      = args.timeout or 86400 -- 24 hrs
31     local current_call          = "curl -s 'http://api.openweathermap.org/data/2.5/weather?id=%s&units=%s&lang=%s'"
32     local forecast_call         = "curl -s 'http://api.openweathermap.org/data/2.5/forecast/daily?id=%s&units=%s&lang=%s&cnt=%s'"
33     local city_id               = args.city_id or 0 -- placeholder
34     local units                 = args.units or "metric"
35     local lang                  = args.lang or "en"
36     local cnt                   = args.cnt or 7
37     local date_cmd              = args.date_cmd or "date -u -d @%d +'%%a %%d'"
38     local icons_path            = args.icons_path or lain_icons .. "openweathermap/"
39     local w_notification_preset = args.w_notification_preset or {}
40     local settings              = args.settings or function() end
41
42     weather.widget = wibox.widget.textbox('')
43     weather.icon   = wibox.widget.imagebox()
44
45     function weather.show(t_out)
46         weather.hide()
47         weather.notification = naughty.notify({
48             text    = weather.notification_text,
49             icon    = weather.icon_path,
50             timeout = t_out,
51             preset  = w_notification_preset
52         })
53     end
54
55     function weather.hide()
56         if weather.notification ~= nil then
57             naughty.destroy(weather.notification)
58             weather.notification = nil
59         end
60     end
61
62     function weather.attach(obj)
63         obj:connect_signal("mouse::enter", function()
64             weather.show(0)
65         end)
66         obj:connect_signal("mouse::leave", function()
67             weather.hide()
68         end)
69     end
70
71     function weather.forecast_update()
72         local cmd = string.format(forecast_call, city_id, units, lang, cnt)
73         async.request(cmd, function(f)
74             j = f:read("*all")
75             f:close()
76             weather_now, pos, err = json.decode(j, 1, nil)
77
78             if not err and weather_now ~= nil and tonumber(weather_now["cod"]) == 200 then
79                 weather.notification_text = ''
80                 for i = 1, weather_now["cnt"] do
81                     local f = assert(io.popen(string.format(date_cmd, weather_now["list"][i]["dt"])))
82                     day = string.gsub(f:read("*all"), "\n", "")
83                     f:close()
84
85                     tmin = math.floor(weather_now["list"][i]["temp"]["min"])
86                     tmax = math.floor(weather_now["list"][i]["temp"]["max"])
87                     desc = weather_now["list"][i]["weather"][1]["description"]
88
89                     weather.notification_text = weather.notification_text ..
90                                                 string.format("<b>%s</b>: %s, %d - %d  ", day, desc, tmin, tmax)
91
92                     if i < weather_now["cnt"] then
93                         weather.notification_text = weather.notification_text .. "\n"
94                     end
95                 end
96             else
97                 weather.icon_path = icons_path .. "na.png"
98                 weather.notification_text = "API/connection error or bad/not set city ID"
99             end
100         end)
101     end
102
103     function weather.update()
104         local cmd = string.format(current_call, city_id, units, lang)
105         async.request(cmd, function(f)
106             j = f:read("*all")
107             f:close()
108             weather_now, pos, err = json.decode(j, 1, nil)
109
110             if not err and weather_now ~= nil and tonumber(weather_now["cod"]) == 200 then
111                 weather.icon_path = icons_path .. weather_now["weather"][1]["icon"] .. ".png"
112                 weather.icon:set_image(weather.icon_path)
113                 widget = weather.widget
114                 settings()
115             else
116                 weather.widget._layout.text = " N/A " -- tries to avoid textbox bugs
117                 weather.icon:set_image(icons_path .. "na.png")
118             end
119         end)
120     end
121
122     weather.attach(weather.widget)
123
124     newtimer("weather-" .. city_id, timeout, weather.update)
125     newtimer("weather_forecast" .. city_id, timeout, weather.forecast_update)
126
127     return setmetatable(weather, { __index = weather.widget })
128 end
129
130 return setmetatable({}, { __call = function(_, ...) return worker(...) end })