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--[[
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")
local string = { format = string.format }
local tonumber = tonumber
-- Crypto currencies widget
-- lain.widgets.contrib.ccurr
local ccurr = {}
-- Currently gets
-- * BTC/USD
-- * 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
local function get(url)
local f = io.popen('curl -m 5 -s "' .. url .. '"')
if not f then
return 0
else
local s = f:read("*all")
f:close()
return s
end
end
local function parse(j)
local obj, pos, err = json.decode(j, 1, nil)
if err then
return nil
else
return obj
end
end
local function worker(args)
local args = args or {}
local timeout = args.timeout or 600
local btc_url = args.btc_url or "https://coinbase.com/api/v1/prices/buy"
local doge_url = args.doge_url or "http://pubapi.cryptsy.com/api.php?method=singlemarketdata&marketid=132"
local settings = args.settings or function() end
ccurr.widget = wibox.widget.textbox('')
local function update()
price_now = {
btc = "N/A",
doge = "N/A"
}
btc = parse(get(btc_url))
doge = parse(get(doge_url))
if btc and doge then
price_now.btc = tonumber(btc["subtotal"]["amount"])
price_now.doge = tonumber(doge["return"]["markets"]["DOGE"]["lasttradeprice"])
price_now.doge = string.format("%.4f", price_now.btc * price_now.doge)
end
widget = ccurr.widget
settings()
end
newtimer("ccurr", timeout, update)
return ccurr.widget
end
return setmetatable(ccurr, { __call = function(_, ...) return worker(...) end })
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