Hexchat CoinMarketCap crypto price json query in python

coinmarketprice.py

import urllib.request
import hexchat
import json

__module_name__ = "Coinmarketcap API query"
__module_version__ = "2.2"
__module_description__ = "Say BTC price when you type /BTC or trigger !BTC"
__author__ = "tpruvot"

__url_cmc__ = "http://api.coinmarketcap.com/v1/ticker"
__fiat_currencies__ = ["AUD","BRL","CAD","CHF","CNY","EUR","GBP","HKD","IDR","INR","JPY","KRW","MXN","RUB","USD"]

# Dict filled by /BTC list
__alts_symbols__ = {
	"ETH": "ethereum",
	"ZEC": "zcash",
}

full_name = "%s v%s by %s" % (__module_name__, __module_version__, __author__)
help_hook = "\"/BTC [FIAT]\" will send btc price in channel. \"/BTC list\" for alt currencies."

def price_query(words, word_eol, userdata):
	url = __url_cmc__ + "/bitcoin/"
	currency = "BTC"
	base = "USD"

	# common mistakes..
	if words[1] == "BTX":
		words[1] = "bitcore"

	if len(words) >= 2 and words[1] in ["list","search"]:
		currency = "list"
		url = __url_cmc__ + "/"
	elif len(words) >= 2 and words[1] == words[1].lower():
		currency = words[1]
		base = "BTC"
		url = __url_cmc__ + "/%s/" % currency
		if len(words) == 3: # /BTC decred USD
			base = words[2]
			url += "?convert=" + base
	elif len(words) >= 2 and words[1] in __alts_symbols__.keys():
		currency = __alts_symbols__[words[1]]
		base = "BTC"
		url = __url_cmc__ + "/%s/" % currency
		if len(words) == 3: # /BTC ETH USD
			base = words[2]
			url += "?convert=" + base
	elif len(words) == 2:
		base = words[1]
		url += "?convert=" + base

	request = urllib.request.Request(url)
	try:
		response = urllib.request.urlopen(request);
	except IOError as e:
		if hasattr(e, 'code'):
			hexchat.prnt("An error occured, HTTP code %d was returned." % e.code)
		return hexchat.EAT_ALL

	try:
		data = json.loads(response.read().decode())
	except JSONDecodeError as e:
		hexchat.prnt("JSON error %s at %d " % (e.msg, e.lineno))
		return hexchat.EAT_ALL

	# list (or search) other available currencies
	if currency == "list":
		ids = ""
		for obj in data:
			if len(words) < 3 or obj["id"].find(words[2]) >= 0 or obj["symbol"].find(words[2]) >= 0:
				ids += obj["id"] + " "
			# fill symbol=>id cache dict
			symbol = obj["symbol"]
			__alts_symbols__[symbol] = obj["id"]
		if ids != "":
			hexchat.prnt("currencies: " + ids)
		return hexchat.EAT_ALL

	obj = data[0]
	price_field = "price_" + base.lower()
	pct24 = pct7d = 0
	if price_field in obj:
		price = float(obj[price_field])
		if obj["percent_change_24h"]:
			pct24 = float(obj["percent_change_24h"])
		if obj["percent_change_7d"]:
			pct7d = float(obj["percent_change_7d"])
		if base in __fiat_currencies__:
			hexchat.command("say %s price: %.2f %s, 24h %+.1f%%, week %+.1f%%" % (currency, price, base, pct24, pct7d))
		else: # percent changes are for the market cap in FIAT, not the BTC price
			hexchat.command("say %s price: %.8f %s" % (currency, price, base))
	return hexchat.EAT_ALL

def chan_trigger(params, word_eol, userdata):
	if params[1].find('!BTC') != -1:
		price_query(params[1].split(' '), word_eol, userdata)

hexchat.hook_command("BTC", price_query, help=help_hook)
hexchat.hook_print("Channel Message", chan_trigger)
# hexchat.hook_print("Private Message", chan_trigger)
hexchat.hook_print("Private Message to Dialog", chan_trigger) # test to myself

# load symbol cache, can take some time..
price_query(["BTC","list"], "\n", 0)

hexchat.prnt(full_name + " loaded.")