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update forex only every 3h
[etc/awesome.git] / .config / awesome / forex_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 parse_ecb_rates(output, symbol, prec)
9     local xc, pos, err = dkjson.decode(output, 1, nil)
10     if not prec then prec = 2 end
11     val = (xc and xc["rates"] and xc["rates"][symbol]) or 0
12     print (val)
13     val = math.floor(val*10^prec+0.5)/10^prec
14     return (not err and val) or "n/a"
15 end
16
17 widgets.ecb_widget = awful.widget.watch(
18   "curl -m5 -s 'http://api.exchangeratesapi.io/v1/latest?base=EUR&access_key=28639a585f6b46bbddd41d3ffe337fc5&symbols=NZD,USD,CHF'", 10800,
19   function(widget, output)
20     widget:set_text(parse_ecb_rates(output, 'NZD') .. " NZD = "
21     .. parse_ecb_rates(output, 'CHF') .. " CHF")
22   end
23 )
24
25 return widgets