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