/
userops.py
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/
userops.py
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import pymongo
import whirlpool
import logging
import datetime
import os
import uuid
from urlvalidation import validate_url
logger = logging.getLogger(__file__)
dbconn = pymongo.Connection()
db = dbconn['slshr']
#TODO better table name
coll = db['realusers']
db = dbconn['list']
#schema: _id: default, author:string
playlistcol = db['playlists']
#schema: _id: username, hash: string, salt: string
usercol = db['users']
#stupid col, probably should not even exist...
playcol = db['playlists']
#schema: _id: username, followts = timestamp followers = [{ username: username, followts: timestamp }] #TODO check this schema
followerscol = db['followers']
#schema: _id: username, following = [{ username: username, followts: timestamp }]
followingcol = db['following']
#schema: _id default, url: string, headline: string, insertts: timestamp
#thats schema for the playlist where the collection name is the curator
def usercheck(creds, request):
return credcheck(creds['login'], creds['password'])
def credcheck(login, password):
#first lookup in db and validate
cursor = coll.find({"_id" : login.lower()})
if cursor.count() == 0:
logger.info("looked up " + login + ", found 0 users")
return False
if cursor.count() > 1:
logger.warning("looked up " + login + ", found multiple users!")
return False
userdoc = cursor[0]
#now generate the hash
wp = whirlpool.new("" + password + userdoc['salt'])
passhash = wp.hexdigest()
if passhash == userdoc['hash']:
return True
return False
def gensalt():
return os.urandom(512).encode('base64')#length of the hash output i think...
#confirms there is a user is usercol that has this username
def user_exists(username):
cursor = coll.find({'_id': username})
if cursor.count() == 0:
return False
elif cursor.count() > 1:
logger.error('BAD: there is are multiple users named: ' + username)
#TODO do we want to throw an exception here?
return True
else:
return True
def create_new_user(username, userpass):
#TODO do I need this checks?
#check for valid
if username is None or userpass is None:
return False
if user_exists(username):
return False
#generate hash
salt = gensalt()
wp = whirlpool.new("" + userpass + salt)
passhash = wp.hexdigest()
#insert into db
userdoc = {'_id': username.lower()}
userdoc['hash'] = passhash
userdoc['salt'] = salt
userdoc['signupts'] = datetime.datetime.utcnow()
userdoc['following'] = []
userdoc['followers'] = []
userdoc['links'] = []
coll.insert(userdoc)
return True
def get_all_playlists():
playlists = []
for user in coll.find():
playlists.append(user)
return playlists
#NOTE: assumes that the user exists and username is not None
def get_user_articles(username):
user = coll.find({'_id': username})[0]
articles = user['links']
articles.sort(key=lambda article: article['timestamp'])
articles.reverse()
return articles
#need to pass error up here
#NOTE: assumes that the user is already verified
def insert_user_article(username, headline, url):
if headline is not None and url is not None:
if validate_url(url):
user = coll.find({'_id': username})[0]
ts = datetime.datetime.utcnow()
id = uuid.uuid4()
newarticle = {'url': url, 'headline': headline, 'timestamp': ts, "id": id}
user['links'].append(newarticle)
coll.update({'_id': username}, user)
return newarticle
return None
#NOTE: assumes that the user is already verified and targetentry is not None
def delete_user_article_by_id(username, targetid):
logger.info("in delete_user_article_by_id")
logger.debug(targetid)
targetuuid = uuid.UUID(targetid)
articles = get_user_articles(username)
for i, article in enumerate(articles):
if "id" in article.keys() and article['id'] == targetuuid:
logger.debug("found article to delete")
del articles[i]
break
coll.update({"_id": username}, {"$set": {"links": articles}})
def delete_user_article_by_idx(username, targetidx):
logger.info("in delete_user_article_by_idx")
#first get an ordered list of the users articles
articles = get_user_articles(username)
#now remove the deleted element
del articles[targetidx]
#call update
coll.update({"_id": username}, {"$set": {"links": articles}})
#NOTE: assumes these are valid users
def follows(follower, followee):
#first get following and followers
following = get_user_following(follower)
followers = get_user_followers(followee)
alreadyfollowing = False
alreadyfollowed = False
for user in following:
if user['username'] == followee:
alreadyfollowing = True
break
for user in followers:
if user['username'] == follower:
alreadyfollowed = True
#if alreadyfollowing != alreadyfollowed
if alreadyfollowing != alreadyfollowed:
logger.error('users are not in same following/followed state: ' + follower + ' and ' + followee)
return False
if alreadyfollowing:
return True
return False
#get all the follows for a user
#NOTE: assumes the user exists and is valid
def get_user_following(username):
cursor = coll.find({'_id': username})
count = cursor.count()
following = []
if count == 0:
logger.error('no following entry for ' + username)
elif count == 1:
following = cursor[0]['following']
else:
logger.error('got more than one use in followcoll in followers_view')
#TODO is this the right behavior?
following = cursor[0]['following']
return following
#get all the follows for a user
#NOTE: assumes the user exists and is valid
def get_user_followers(username):
cursor = coll.find({'_id': username})
count = cursor.count()
followers = []
if count == 1:
followers = cursor[0]['followers']
elif count > 1:
logger.error('got more than one use in followercol in get_user_followers')
followers = cursor[0]['followers']
else:
logger.error('no followers entry for ' + username)
return followers
#NOTE: assumes both users exist are are valid
def new_follow(follower, followee):
followcursor = coll.find({'_id': followee})
followcount = followcursor.count()
if followcount == 0:
#TODO should this be an exception?
logger.error('no entry in followers for user ' + followee)
return False
if followcount > 1:
looger.error('followcol has multiple users with name ' + followee)
return False
followingcursor = coll.find({'_id': follower})
followingcount = followingcursor.count()
if followingcount == 0:
logger.error('no entry in followers for user ' + username)
return False
if followcount > 1:
looger.error('followcol has multiple users with name ' + followee)
return False
#return false if already follows
if follows(follower, followee):
return False
#both are the right count
ts = datetime.datetime.utcnow()
coll.update({'_id': followee}, {"$push" : { "followers": { "username": follower, "followts": ts}}})
coll.update({'_id': follower}, {"$push": { "following": { "username": followee, "followts": ts}}})
#NOTE: assumes that both users exist and are valid
def unfollow(follower, followee):
followcursor = coll.find({'_id': followee})
followcount = followcursor.count()
if followcount == 0:
#TODO should this be an exception?
logger.error('no entry in followers for user ' + followee)
return False
if followcount > 1:
logger.error('followcol has multiple users with name ' + followee)
return False
followingcursor = coll.find({'_id': follower})
followingcount = followingcursor.count()
if followingcount == 0:
logger.error('no entry in followers for user ' + username)
return False
if followcount > 1:
logger.error('followcol has multiple users with name ' + followee)
return False
if not follows(follower, followee):
logger.info(follower + " does not follow " + followee)
return False
coll.update({'_id': followee}, {"$pull" : { "followers": { "username": follower}}})
coll.update({'_id': follower}, {"$pull": { "following": { "username": followee}}})
return True