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update forex only every 3h
[etc/awesome.git] / .config / awesome / cryptocoin_widgets.lua
1 local dkjson = require("lain.util").dkjson
2 local math = require("math")
3 local awful = require("awful")
4 local beautiful = require("beautiful")
5
6 local widgets = {}
7
8 local function poloniex_price(output, pair, prec)
9     local xc, pos, err = dkjson.decode(output, 1, nil)
10     if not prec then prec = 4 end
11     val = (xc and xc[pair]["last"]) or 0
12     val = math.floor(val*10^prec+0.5)/10^prec
13     return (not err and val) or "n/a"
14 end
15
16 widgets.eth_widget = awful.widget.watch(
17   "curl -m5 -s 'https://poloniex.com/public?command=returnTicker'", 600,
18   function(widget, output)
19     widget:set_text(poloniex_price(output, 'BTC_ETH') .. " Ƀ/Ξ")
20   end
21 )
22
23 local function coindesk_price(output, base, prec)
24     local xc, pos, err = dkjson.decode(output, 1, nil)
25     if not prec then prec = 4 end
26     val = (xc and xc["bpi"][base]["rate_float"]) or 0
27     val = math.floor(val*10^prec+0.5)/10^prec
28     return (not err and val) or "n/a"
29 end
30
31 widgets.btc_widget = awful.widget.watch(
32   "curl -m5 -Ls 'https://api.coindesk.com/v1/bpi/currentprice/EUR.json'", 600,
33   function(widget, output)
34     widget:set_text(coindesk_price(output, "EUR", 2) .. " €/Ƀ")
35   end
36 )
37
38 return widgets