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c06de57632182beba936c83ed3da856113354162
[etc/awesome.git] / widgets / contrib / acw.lua
1 -[[
2                                                   
3      Licensed under GNU General Public License v2 
4       * (c) 2014, Aaron Lebo                     
5                                                   
6 --]]
7
8 local newtimer = require("lain.helpers").newtimer
9 local wibox = require("wibox")
10 local json = require("dkjson")
11
12 -- acw (awesome crypto widget)
13 -- diplays BTC/USD and DOGE/USD using Coinbase and Cryptsy APIs
14 -- requires http://dkolf.de/src/dkjson-lua.fsl/home   
15 -- based upon http://awesome.naquadah.org/wiki/Bitcoin_Price_Widget
16 -- lain.widgets.contrib.acw
17
18 acw = {widget=wibox.widget.textbox('')}
19
20 local function get(url)
21     f = io.popen('curl -m 5 -s "' .. url .. '"')
22     if (not f) then return 0 end
23     return f:read("*all")
24 end
25
26 local function parse(j)
27     local obj, pos, err = json.decode (j, 1, nil)
28     if err thenfunction worker(args)
29         return nil
30     else
31         return obj
32     end
33 end
34
35 function worker(args)
36     local args = args or {}
37     local timeout = args.timeout or 600
38     local settings = args.settings or function() end
39
40     local function update()
41         btc = parse(get("https://coinbase.com/api/v1/prices/buy"))
42         if btc then
43             btc = tonumber(btc["subtotal"]["amount"])
44             btc_display = "$" .. btc
45         else
46             btc_display = "N/A"
47         end
48         doge = parse(get("http://pubapi.cryptsy.com/api.php?method=singlemarketdata&marketid=132"))
49         if doge and btc then
50             doge = tonumber(doge["return"]["markets"]["DOGE"]["lasttradeprice"])
51             doge_display = string.format("$%.4f", btc * doge)
52         else
53             doge_display = "N/A"
54         end
55         prices = btc_display .. " " ..  doge_display
56         prices_now = {}
57         prices_now.prices = prices
58
59         widget = acw.widget
60         settings()
61    end
62
63     newtimer("acw", timeout, update)
64
65     return acw.widget
66 end
67
68 return setmetatable(acw, { __call = function(_, ...) return worker(...) end })