import praw

r = praw.Reddit(client_id='',
                        client_secret='',
                        password='',
                        user_agent='',
                        username='')
#Settings
SUBREDDIT = 'Robin_Redbreast'
USER = 'Robin_Redbreast'
POST_ID = '77v6xj'

#Message Constants
OPT_OUT = 'You have successfully opted out.'
OPT_IN = 'You have successfully opted in.'
FOOTER = '^(I am a bot, and this message was sent automatically. | Want to opt out? Reply to this message with !optout |) [^Link ^to ^post]({plink})'
TITLE = 'New post in /r/{subreddit}: {post_title}.'
BODY = '''There has been a new post in /r/Robin_Redbreast by /u/{user}:\n\n>{preview}\n\n---\n\n'''

def addFriends():
	authors = list(set([(c, c.author) for c in r.submission(id=POST_ID).comments if not c.saved]))
	friends = r.user.friends()
	for comment, author in authors:
		comment.save()
		if '!quebec' in comment.body.lower():
			if author not in friends:
				author.friend()
				author.message('Opt-in successful', OPT_IN)
			else:
				author.message('Error', 'You are already opted-in.')


def removeFriends():
	for message in r.inbox.unread(limit=None):
		message.mark_read()
		if '!optout' in message.body.lower()+message.subject.lower():
			if message.author in r.user.friends():
				message.author.unfriend()
				message.reply(OPT_OUT)
			else:
				message.reply('Error: You are not currently opted-in.')

def update_friends(post):
	for friend in r.user.friends():
		friend.message(TITLE.format(subreddit=SUBREDDIT, post_title=post.title), BODY.format(user=post.author.name, preview=post.selftext[:300]+'...')+FOOTER.format(plink=post.shortlink))

def sendMessages():
	for post in r.subreddit(SUBREDDIT).new(limit=5):
		if not post.saved:
			post.save()
			if post.author.name.lower() == USER.lower() and '[ms]' in post.title.lower():
				update_friends(post)

def main():
	addFriends()
	removeFriends()
	sendMessages()


if __name__ == '__main__':
	while True:
		try:
			main()
		except Exception as e:
			print(str(e))