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