]> 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:

Cleanup and standardization in centerfair
[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 timeout               = args.timeout or 900   -- 15 min
34     local timeout_forecast      = args.timeout or 86400 -- 24 hrs
35     local current_call          = "curl -s 'http://api.openweathermap.org/data/2.5/weather?id=%s&units=%s&lang=%s'"
36     local forecast_call         = "curl -s 'http://api.openweathermap.org/data/2.5/forecast/daily?id=%s&units=%s&lang=%s&cnt=%s'"
37     local city_id               = args.city_id or 0 -- placeholder
38     local units                 = args.units or "metric"
39     local lang                  = args.lang or "en"
40     local cnt                   = args.cnt or 7
41     local date_cmd              = args.date_cmd or "date -u -d @%d +'%%a %%d'"
42     local icons_path            = args.icons_path or lain_icons .. "openweathermap/"
43     local notification_preset   = args.notification_preset or {}
44     local notification_text_fun = args.notification_text_fun or
45                                   function (day, desc, tmin, tmax)
46                                       return string.format("<b>%s</b>: %s, %d - %d  ", day, desc, tmin, tmax)
47                                   end
48     local followmouse           = args.followmouse or false
49     local settings              = args.settings or function() end
50
51     weather.widget = wibox.widget.textbox('')
52     weather.icon   = wibox.widget.imagebox()
53
54     function weather.show(t_out)
55         weather.hide()
56
57         if followmouse then
58             notification_preset.screen = mouse.screen
59         end
60
61         weather.notification = naughty.notify({
62             text    = weather.notification_text,
63             icon    = weather.icon_path,
64             timeout = t_out,
65             preset  = notification_preset
66         })
67     end
68
69     function weather.hide()
70         if weather.notification ~= nil then
71             naughty.destroy(weather.notification)
72             weather.notification = nil
73         end
74     end
75
76     function weather.attach(obj)
77         obj:connect_signal("mouse::enter", function()
78             weather.show(0)
79         end)
80         obj:connect_signal("mouse::leave", function()
81             weather.hide()
82         end)
83     end
84
85     function weather.forecast_update()
86         local cmd = string.format(forecast_call, city_id, units, lang, cnt)
87         async.request(cmd, function(f)
88             local pos, err
89             weather_now, pos, err = json.decode(f, 1, nil)
90
91             if not err and weather_now ~= nil and tonumber(weather_now["cod"]) == 200 then
92                 weather.notification_text = ''
93                 for i = 1, weather_now["cnt"] do
94                     local day = string.gsub(read_pipe(string.format(date_cmd, weather_now["list"][i]["dt"])), "\n", "")
95
96                     local tmin = math.floor(weather_now["list"][i]["temp"]["min"])
97                     local tmax = math.floor(weather_now["list"][i]["temp"]["max"])
98                     local desc = weather_now["list"][i]["weather"][1]["description"]
99
100                     weather.notification_text = weather.notification_text ..
101                                                 notification_text_fun(day, desc, tmin, tmax)
102
103                     if i < weather_now["cnt"] then
104                         weather.notification_text = weather.notification_text .. "\n"
105                     end
106                 end
107             else
108                 weather.icon_path = icons_path .. "na.png"
109                 weather.notification_text = "API/connection error or bad/not set city ID"
110             end
111         end)
112     end
113
114     function weather.update()
115         local cmd = string.format(current_call, city_id, units, lang)
116         async.request(cmd, function(f)
117             local pos, err
118             weather_now, pos, err = json.decode(f, 1, nil)
119
120             if not err and weather_now ~= nil and tonumber(weather_now["cod"]) == 200 then
121                 weather.icon_path = icons_path .. weather_now["weather"][1]["icon"] .. ".png"
122                 weather.icon:set_image(weather.icon_path)
123                 widget = weather.widget
124                 settings()
125             else
126                 weather.widget._layout.text = " N/A " -- tries to avoid textbox bugs
127                 weather.icon:set_image(icons_path .. "na.png")
128             end
129         end)
130     end
131
132     weather.attach(weather.widget)
133
134     newtimer("weather-" .. city_id, timeout, weather.update)
135     newtimer("weather_forecast-" .. city_id, timeout, weather.forecast_update)
136
137     return setmetatable(weather, { __index = weather.widget })
138 end
139
140 return setmetatable({}, { __call = function(_, ...) return worker(...) end })