Merge pull request #27 from aaron-lebo/master

Contributed crypto-currencies widget added

widgets/contrib/acw/init.lua

@@ -0,0 +1,68 @@
+-[[
+                                                  
+     Licensed under GNU General Public License v2 
+      * (c) 2014, Aaron Lebo                     
+                                                  
+--]]
+
+local newtimer = require("lain.helpers").newtimer
+local wibox = require("wibox")
+local json = require("dkjson")
+
+-- acw (awesome crypto widget)
+-- diplays BTC/USD and DOGE/USD using Coinbase and Cryptsy APIs
+-- requires http://dkolf.de/src/dkjson-lua.fsl/home   
+-- based upon http://awesome.naquadah.org/wiki/Bitcoin_Price_Widget
+-- lain.widgets.contrib.acw
+
+acw = {widget=wibox.widget.textbox('')}
+
+local function get(url)
+    f = io.popen('curl -m 5 -s "' .. url .. '"')
+    if (not f) then return 0 end
+    return f:read("*all")
+end
+
+local function parse(j)
+    local obj, pos, err = json.decode (j, 1, nil)
+    if err thenfunction worker(args)
+        return nil
+    else
+        return obj
+    end
+end
+
+function worker(args)
+    local args = args or {}
+    local timeout = args.timeout or 600
+    local settings = args.settings or function() end
+
+    local function update()
+        btc = parse(get("https://coinbase.com/api/v1/prices/buy"))
+        if btc then
+            btc = tonumber(btc["subtotal"]["amount"])
+            btc_display = "$" .. btc
+        else
+            btc_display = "N/A"
+        end
+        doge = parse(get("http://pubapi.cryptsy.com/api.php?method=singlemarketdata&marketid=132"))
+        if doge and btc then
+            doge = tonumber(doge["return"]["markets"]["DOGE"]["lasttradeprice"])
+            doge_display = string.format("$%.4f", btc * doge)
+        else
+            doge_display = "N/A"
+        end
+        prices = btc_display .. " " ..  doge_display
+        prices_now = {}
+        prices_now.prices = prices
+
+        widget = acw.widget
+        settings()
+   end
+
+    newtimer("acw", timeout, update)
+
+    return acw.widget
+end
+
+return setmetatable(acw, { __call = function(_, ...) return worker(...) end })