Greeter Bot for reddit

gistfile1.txt

AUTHOR = "Thomas1122"
BOT_NAME = "Greeter Bot"
USER_AGENT = "%s by %s" % (BOT_NAME,AUTHOR)
BOT_USERNAME = "" # use your own
BOT_PASSWORD = "" #


import praw,datetime,time,random
from requests import HTTPError
reddit = None
db = {}


def setup_praw():
	global reddit
	reddit = praw.Reddit(user_agent=USER_AGENT)
	reddit.login(username=BOT_USERNAME,password = BOT_PASSWORD)

def setup_bot():
	setup_praw()

def load_database():
	global db
	with open('greeter_bot.txt','r') as f:
		for line in f.readlines():
			username,lastgreet,cid = line.strip().split(",")
			db[username] = (datetime.datetime.strptime(lastgreet, "%Y-%m-%d %H:%M:%S.%f") , cid)

def store_database():
	global db
	with open('greeter_bot.txt','w+') as f:
		for k in db:
			f.write("%s,%s,%s\n" % (k,db[k][0],db[k][1]))

def add_entry(username,lastgreet,lastcid):
	db[str(username)] = (lastgreet, lastcid)
	store_database()

def delete_entry(username):
	username = str(username)
	if username in db:
		del db[username]
		store_database()

def check_new_messages():
	for msg in reddit.get_unread(limit=None):
		username = str(msg.author)
		if msg.subject.lower() == 'hi' or msg.subject.lower() == 'hello' :
			add_entry(username,datetime.datetime.now(),'0')
			#reddit.send_message(msg.author, 'Registered', 'Welcome! You have been registered successfully by the /u/greeter_bot. I will greet you everyday with a single comment.')
			log( 'Recieved registration message from %s.' % username )
			send_greeting_to( username , '0' )
			msg.mark_as_read()
			reddit.get_redditor(username).friend()
		elif msg.subject.lower() == 'bye' and username in db:
			delete_entry(username)
			#reddit.send_message(msg.author, 'Unregistered', 'You have been unregistered successfully by the /u/greeter_bot. I am sorry to see you go! :(')
			log ('%s unregistered from my service. :(' %username)
			msg.mark_as_read()
			reddit.get_redditor(username).unfriend()
setup_bot()
load_database()

def log(t):
	print '%s - %s' % (datetime.datetime.now().time() , t)

def random_greeting(username):
	username = '/u/' + username
	g = random.choice(["Hi %s. :)", "Greetings %s. Lovely day we're having.","Hello %s! Have a nice day.","Hey %s, you look nice. :)","Good day, %s!"])  % username
	msg = "%s\n\r%s" % (g,"^^^I ^^^am ^^^a ^^^bot. ^^^If ^^^I'm ^^^malfunctioning, ^^^report ^^^it ^^^[here](http://redd.it/2341pg).")
	return msg

def send_greeting_to(username,cid):
	for com in reddit.get_redditor(username).get_comments(limit=1):
		if str(com.id) != cid:
			com.reply(random_greeting(username))
			#log( random_greeting(username) )
			log( 'Sent greetings to %s.' % username)
			return com.id
	return cid



def send_greetings():
	now = datetime.datetime.now()
	for k in db:
		
		if (now - db[k][0]).days >= 1:
			print '%s was last greeted %s day(s) ago' % (k,str((now - db[k][0]).days))
			try:
				cid = send_greeting_to(k,db[k][1])
				add_entry(k, now, cid)
			except HTTPError as err:
				log( "Probably banned from /r/" + str(comment.subreddit) )
			except praw.errors.RateLimitExceeded as err:
				log( "Rate Limit Exceeded:\n" + str(err) )
				#time.sleep(err.sleep_time)


while True:
	log( 'Time to wakeup.' )
	check_new_messages()
	log( 'Total number of registered users - %d' % len(db))
	send_greetings()
	log( 'Off to sleep.' )
	time.sleep(10 * 60)