import os
import json
import re

class Wordfilter:
    def __init__(self):
        # json is in same directory as this class, given by __location__.
        self.blocklist = set()

        __location__ = os.path.realpath(
            os.path.join(os.getcwd(), os.path.dirname(__file__)))
        with open(os.path.join(__location__, 'badwords.json')) as f:
            self.add_words(json.loads(f.read()))

    def blocked(self, text):
        words = set(re.split(r'\W+', text))
        return any(word.casefold() in self.blocklist for word in words)

    def add_words(self, words):
        self.blocklist |= set(word.casefold() for word in words)