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readme updated
[etc/awesome.git] / widgets / yawn / init.lua
1
2 --[[
3                                                
4      Yahoo's Awesome (WM) Weather Notification 
5                                                
6      Licensed under WTFPL v2                   
7       * (c) 2013, Luke Bonham                  
8                                                
9 --]]
10
11 local markup       = require("lain.util.markup")
12
13 local beautiful    = require("beautiful")
14 local naughty      = require("naughty")
15 local wibox        = require("wibox")
16
17 local debug        = { getinfo = debug.getinfo }
18 local io           = io
19 local os           = { date    = os.date,
20                        getenv  = os.getenv }
21 local string       = { find    = string.find,
22                        match   = string.match,
23                        gsub    = string.gsub,
24                        sub     = string.sub }
25 local tonumber     = tonumber
26
27 local setmetatable = setmetatable
28
29 -- yawn integration
30 -- https://github.com/copycat-killer/yawn
31 -- lain.widgets.yawn
32 local yawn =
33 {
34     units    = "",
35     forecast = "",
36     icon     = wibox.widget.imagebox(),
37     widget   = wibox.widget.textbox()
38 }
39
40 local project_path       = debug.getinfo(1, 'S').source:match[[^@(.*/).*$]]
41 local localizations_path = project_path .. 'localizations/'
42 local icon_path          = project_path .. 'icons/'
43 local api_url            = 'http://weather.yahooapis.com/forecastrss'
44 local units_set          = '?u=c&w=' -- Default is Celsius
45 local language           = string.match(os.getenv("LANG"), "(%S*$*)[.]")
46 local weather_data       = nil
47 local notification       = nil
48 local city_id            = nil
49 local sky                = nil
50 local settings           = {}
51 local update_timer       = nil
52
53 local function fetch_weather(args)
54     local toshow = args.toshow or "forecast"
55     local spr = args.spr or " "
56     local footer = args.footer or ""
57
58     local url = api_url .. units_set .. city_id
59     local f = io.popen("curl --connect-timeout 1 -fsm 2 '"
60                        .. url .. "'" )
61     local text = f:read("*all")
62     io.close(f)
63
64     -- In case of no connection or invalid city ID
65     -- widgets won't display
66     if text == "" or text:match("City not found")
67     then
68         sky = icon_path .. "na.png"
69         if text == "" then
70             weather_data = "Service not available at the moment."
71             return "N/A"
72         else
73             weather_data = "City not found!\n" ..
74                            "Are you sure " .. city_id ..
75                            " is your Yahoo city ID?"
76             return "?"
77         end
78     end
79
80     -- Processing raw data
81     weather_data = text:gsub("<.->", "")
82     weather_data = weather_data:match("Current Conditions:.-Full")
83     weather_data = weather_data:gsub("Current Conditions:.-\n", "Now: ")
84     weather_data = weather_data:gsub("Forecast:.-\n", "")
85     weather_data = weather_data:gsub("\nFull", "")
86     weather_data = weather_data:gsub("[\n]$", "")
87     weather_data = weather_data:gsub(" [-] " , ": ")
88     weather_data = weather_data:gsub("[.]", ",")
89     weather_data = weather_data:gsub("High: ", "")
90     weather_data = weather_data:gsub(" Low: ", " - ")
91
92     -- Getting info for text widget
93     local now      = weather_data:sub(weather_data:find("Now:")+5,
94                      weather_data:find("\n")-1)
95     local forecast = now:sub(1, now:find(",")-1)
96     local units    = now:sub(now:find(",")+2, -2)
97
98     -- Day/Night icon change
99     local hour = tonumber(os.date("%H"))
100     sky = icon_path
101
102     if forecast == "Clear"         or
103        forecast == "Fair"          or
104        forecast == "Partly Cloudy" or
105        forecast == "Mostly Cloudy"
106        then
107            if hour >= 6 and hour <= 18
108            then
109                sky = sky .. "Day"
110            else
111                sky = sky .. "Night"
112            end
113     end
114
115     sky = sky  .. forecast:gsub(" ", ""):gsub("/", "") .. ".png"
116
117     -- In case there's no defined icon for current forecast
118     f = io.popen(sky)
119     if f == nil then
120         sky = icon_path .. "na.png"
121     else
122         io.close(f)
123     end
124
125     -- Localization
126     local f = io.open(localizations_path .. language, "r")
127     if language:find("en_") == nil and f ~= nil
128     then
129         io.close(f)
130         for line in io.lines(localizations_path .. language)
131         do
132             word = string.sub(line, 1, line:find("|")-1)
133             translation = string.sub(line, line:find("|")+1)
134             weather_data = string.gsub(weather_data, word, translation)
135         end
136     end
137
138     -- Finally setting infos
139     forecast = weather_data:match(": %S+"):gsub(": ", ""):gsub(",", "")
140     yawn.forecast = markup(yawn.forecast_color, markup.font(beautiful.font, forecast))
141     yawn.units = markup(yawn.units_color, markup.font(beautiful.font, units))
142     yawn.icon:set_image(sky)
143
144     if toshow == "forecast" then
145         return yawn.forecast
146     elseif toshow == "units" then
147         return yawn.units
148     else -- "both"
149         return yawn.forecast .. spr
150                .. yawn.units .. footer
151     end
152 end
153
154 function yawn.hide()
155     if notification ~= nil then
156         naughty.destroy(notification)
157         notification = nil
158     end
159 end
160
161 function yawn.show(t_out)
162     if yawn.widget._layout.text == "?"
163     then
164         if update_timer ~= nil
165         then
166             update_timer:emit_signal("timeout")
167         else
168             fetch_weather(settings)
169         end
170     end
171
172     yawn.hide()
173
174     notification = naughty.notify({
175         text = weather_data,
176         icon = sky,
177         timeout = t_out,
178         fg = yawn.notification_color
179     })
180 end
181
182 function yawn.register(id, args)
183     local args = args or {}
184
185     settings = { args.toshow, args.spr, args.footer }
186
187     yawn.units_color        = args.units_color or
188                               beautiful.fg_normal or "#FFFFFF"
189     yawn.forecast_color     = args.forecast_color or
190                               yawn.units_color
191     yawn.notification_color = args.notification_color or
192                               beautiful.fg_focus or "#FFFFFF"
193
194     if args.u == "f" then units_set = '?u=f&w=' end
195
196     city_id = id
197
198     update_timer = timer({ timeout = 600 }) -- 10 mins
199     update_timer:connect_signal("timeout", function()
200         yawn.widget:set_markup(fetch_weather(settings))
201     end)
202     update_timer:start()
203     update_timer:emit_signal("timeout")
204
205     yawn.icon:connect_signal("mouse::enter", function()
206         yawn.show(0)
207     end)
208     yawn.icon:connect_signal("mouse::leave", function()
209         yawn.hide()
210     end)
211 end
212
213 function yawn.attach(widget, id, args)
214     yawn.register(id, args)
215
216     widget:connect_signal("mouse::enter", function()
217         yawn.show(0)
218     end)
219
220     widget:connect_signal("mouse::leave", function()
221         yawn.hide()
222     end)
223 end
224
225 -- }}}
226
227 return setmetatable(yawn, { __call = function(_, ...) return yawn.register(...) end })