Python script to generate a link to an HSReplay.net deck, based on a string of text (for example, a tweet) containing a Hearthstone deck code.

hearthstoneDeckLink.py

#!/usr/bin/python

import binascii
import urllib
import re
import sys

def nextVarInt(fromIndex, bytes):
    shift = 0
    result = 0
    index = fromIndex
    while True:
        byte = ord(bytes[index])
        result |=  (byte & 0x7f) << shift
        shift += 7
        index += 1
        if (not (byte & 0x80)) or index >= len(bytes):
            break

    return (result, index)

def urlFromDeckCode(deckCode):
    binary = binascii.a2b_base64(deckCode)

    reserved = ord(binary[0])
    (version, index) = nextVarInt(1, binary)
    (format, index) = nextVarInt(index, binary)

    cardCount = 0
    cards = []

    (heroesLength, index) = nextVarInt(index, binary)
    for i in range(heroesLength):
        (hero, index) = nextVarInt(index, binary)

    (singlesLength, index) = nextVarInt(index, binary)
    for i in range(singlesLength):
        (single, index) = nextVarInt(index, binary)
        cards.append(single)
        cardCount += 1

    (doublesLength, index) = nextVarInt(index, binary)
    for i in range(doublesLength):
        (double, index) = nextVarInt(index, binary)
        cards.append(double)
        cards.append(double)
        cardCount += 2

    (nCopiesLength, index) = nextVarInt(index, binary)
    for i in range(nCopiesLength):
        (copies, index) = nextVarInt(index, binary)
        (card, index) = nextVarInt(index, binary)
        cardCount += copies
        for x in range(copies):
            cards.append(card)

    cardListString = reduce(lambda ongoing, y: ongoing + str(y) + ",", cards, "")[:-1]

    url = "https://hsreplay.net/decks/#includedCards=" + urllib.quote(cardListString, safe = '')
    return url


tweet = sys.argv[1]

# Find the deck code. We assume the first string with 30 or more 
# consecutive characters without whitespace is it.
match = re.search("\\S{30,}", tweet)
if match != None:
    deckCode = match.group(0)
    url = urlFromDeckCode(deckCode)
    print url
else:
    print ""