crosspost_bot.py

from time import time, strftime, sleep
import praw

source = 'oneplusone+oneplus2+oneplus3+oneplus3t+oneplusx'
dest = 'oneplussupport'
log = 'crosspost_log.txt'

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


def log_start():
    """Log when the bot starts"""
    s_time = strftime("%Y-%m-%d %H:%M:%S")
    with open(log, 'a') as log_file:
        log_file.write('Started {}\n'.format(s_time))


def log_error(error):
    """Log an error"""
    e_time = strftime("%Y-%m-%d %H:%M:%S")
    e_msg = 'Reset {} - {}: {}\n'.format(e_time, type(error).__name__, error)
    with open(log, 'a') as log_file:
        log_file.write(e_msg)


def evaluate(submission):
    """Check for proper flair"""
    flair = submission.link_flair_css_class
    if flair and flair.lower() == 'techsupport':
        return True
    return False


def cross_post(submission):
    """Create a new thread with the OP's selftext"""
    title = submission.title
    selftext = submission.selftext  # Modify to include OP's username and link to original thread
    destination = reddit.subreddit(dest)
    if selftext:
        x_post = destination.submit(title=title, selftext=selftext, send_replies=False)
    else:
        url = submission.url
        x_post = destination.submit(title=title, url=url, send_replies=False)
    return 'http://www.reddit.com{}'.format(x_post.permalink)


def notify_op(submission, cross_post_link):
    """Send a PM to the OP about the crosspost"""
    author = submission.author.name
    title = 'Your techsupport submission has been cross-posted'
    msg = cross_post_link  # body of email
    reddit.redditor(author).message(title, msg)


def sticky_comment(submission, cross_post_link):
    """Create a comment on the original thread linking to the new thread. Try to sticky"""
    msg = 'This post has been automatically cross-posted.\n\n' \
          'Please go [here]({}) for all discussion related to ' \
          'this thread.'.format(cross_post_link)
    comment = submission.reply(msg)

    # Attempt to sticky will 403 fail if not moderator
    try:
        comment.mod.distinguish(sticky=True)
    except Exception as e:
        log_error(e)


def main():
    while True:
        start = time()
        try:
            subreddit = reddit.subreddit(source)
            submission_stream = subreddit.stream.submissions()
            for submission in submission_stream:
                if submission.created_utc < start:
                    continue
                if evaluate(submission):
                    cross_post_link = cross_post(submission)
                    notify_op(submission, cross_post_link)  # Will be notified via comment
                    sticky_comment(submission, cross_post_link)
        except Exception as e:
            log_error(e)
            sleep(60)
            continue


if __name__ == '__main__':
    log_start()
    main()