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DBConnection.py
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import pymongo
from bson.objectid import ObjectId
from datetime import datetime
import classes
class AuthenticationException(Exception):
def __init__(self, message):
self.message = message
def __str__(self):
return repr(self.message)
class AddValueException(Exception):
def __init__(self, message):
self.message = message
def __str__(self):
return repr(self.message)
class DatabaseException(Exception):
def __init__(self, message):
self.message = message
def __str__(self):
return repr(self.message)
class DBConnection:
def __init__(self):
client = pymongo.MongoClient(
"mongodb+srv://Developer:[email protected]/test?retryWrites=true&w=majority")
self.db = client["FlipcardsDB"]
def list_users(self):
users = self.db["users"]
for user in users.find():
print(user)
def get_user(self, email):
users = self.db["users"]
amount = users.count_documents({"email": email})
if amount == 0:
return 0
else:
return users.find({"email": email})
def get_id(self, email):
users = self.db["users"]
user = users.find_one({"email": email})
id = user.get("_id")
return id
def get_set(self, set_id):
result_cards = []
if self.db["cardssets"].count_documents({"_id": ObjectId(set_id)}) == 0:
return -1
cards_set = self.db["cardssets"].find({"_id": ObjectId(set_id)})
for card_id in cards_set["cards"]:
card = self.db["flashcards"].findOne({"_id": ObjectId(card_id)})
result_cards.append(classes.Flashcard(card["Question"], card["Answer"], card["Set"], card["User"]))
return classes.Set(cards_set["Creator"], result_cards, set_id)
def add_user(self, user_name, user_email, user_password):
if len(user_password) < 8:
return -1
already_exists = self.db["users"].count_documents({"email": user_email})
if already_exists > 0:
return -2
users = self.db["users"]
users.insert_one({"UserName": user_name, "password": user_password, "email": user_email, "cardsCreated": 0})
return 1
def user_auth(self, email, given_password):
user = self.get_user(email)
if user == 0:
return -1
result = self.db["users"].count_documents({'email': email, 'password': given_password})
if result == 0:
return -2
return 1
def add_flashcard(self, question, answer, creator_id, set_id):
flashcards = self.db["flashcards"]
if self.db["users"].count_documents({"_id": ObjectId(creator_id)}) == 0:
return -1
query = {"Question": question, "Answer": answer, "User": creator_id, "Set": set_id}
if self.db["flashcards"].count_documents(query) != 0:
return -2
flash_card_id = flashcards.insert_one(
{"Question": question, "Answer": answer, "User": creator_id, "Set": set_id}).inserted_id
self.db["cardssets"].update_one({"_id": ObjectId(set_id)}, {"$addToSet": {"cards": flash_card_id}})
return 1
def add_rating(self, mark, description, creator_id, set_id):
rate = self.db["rating"]
if self.db["rating"].count_documents({"Creator_ID": creator_id, "Set_ID": set_id}) != 0:
return -1 # already rated
if not mark.isdigit():
return -2 # mark isn't an intiger
if int(mark) < 0 or int(mark) > 5:
return -2
rate.insert_one({"Creator_ID": creator_id, "Set_ID": set_id, "Mark": mark, "Description": description})
self.update_average_mark(set_id)
return 1
def update_average_mark(self, set_id):
ratings = self.db["rating"].find({"Set_ID": set_id})
marks_sum = 0
marks_amount = 0
for rating in ratings:
marks_sum += int(rating["Mark"])
marks_amount += 1
self.db["cardssets"].update_one({"_id": set_id}, {"$set": {"avg_mark": round(marks_sum / marks_amount, 2)}})
def get_set_average_mark(self, set_id):
if (self.db["cardssets"].find_one({"_id": set_id}))["avg_mark"] == 0:
return -1
return (self.db["cardssets"].find_one({"_id": set_id}))["avg_mark"]
def get_all_ratings(self, set_id):
ratings = []
if self.db['rating'].count_documents({"Set_ID": set_id}) == 0:
return -1
cursor = self.db["rating"].find({"Set_ID": set_id})
count = self.db["rating"].count_documents({"Set_ID": set_id})
for index in range(count):
ratings.append(classes.Rating(cursor[index]["Creator_ID"], cursor[index]["Set_ID"], cursor[index]["Mark"],
cursor[index]["Description"]))
return ratings
def upload_set(self, cards_set):
if cards_set.ID is None:
set_id = self.db["cardssets"].insert_one({"Description": cards_set.description,
"Creator": cards_set.Creator,
}).inserted_id
for flashcard in cards_set.Flashcards:
self.add_flashcard(flashcard.Question, flashcard.Answer, flashcard.User, set_id)
else:
# TODO
pass
def sets_list_for_selection(self, search_word):
result_sets = {}
for cards_set in self.db["cardssets"].find({"Description": {"$exists": "true"}}):
if search_word in cards_set["Description"]:
cur_set = classes.Set(cards_set["Creator"], cards_set["Description"], cards_set["_id"])
for cardID in cards_set["cards"]:
card = self.db["flashcards"].find_one({"_id": cardID})
cur_set.addFlashcard(classes.Flashcard(card["Question"],
card["Answer"],
card["User"],
cards_set["_id"],
cardID))
result_sets.update({cur_set.ID: cur_set})
del cur_set
return result_sets
def all_sets(self):
result_sets = {}
for cards_set in self.db["cardssets"].find({"Description": {"$exists": "true"}}):
cur_set = classes.Set(cards_set["Creator"], cards_set["Description"], cards_set["_id"])
for cardID in cards_set["cards"]:
card = self.db["flashcards"].find_one({"_id": cardID})
cur_set.addFlashcard(classes.Flashcard(card["Question"],
card["Answer"],
card["User"],
cards_set["_id"],
cardID))
result_sets.update({cur_set.ID: cur_set})
del cur_set
return result_sets