import praw
import re
import base64

reddit = praw.Reddit(client_id="",
                     client_secret="",
                     username="",
                     password="",
                     user_agent="")

subreddit = "testingground4bots"

def find_url(string):
    regex = r"(?i)\b((?:https?://|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}/)(?:[^\s()<>]+|\(([^\s()<>]+|(\([^\s()<>" \
            r"]+\)))*\))+(?:\(([^\s()<>]+|(\([^\s()<>]+\)))*\)|[^\s`!()\[\]{};:'\".,<>?«»“”‘’]))"
    url = re.findall(regex,string)
    return [x[0] for x in url]


for comment in reddit.subreddit(subreddit).stream.comments(skip_existing=True):
    body = comment.body
    link = find_url(body)
    if len(link) <= 0:
        pass
    else:
        encoded_link = base64.b64encode(bytes(link[0], "utf-8"))
        comment.reply(f"Here is the link encoded in base64: {encoded_link}")