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databaseUtils.py
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databaseUtils.py
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import pymysql.cursors
import copy
import string
import random
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
import smtplib
import os
def format_string(target_string):
return target_string.replace("'", "\\'")
class databaseUtils:
def __init__(self, host, username, password, database):
self.host = host
self.username = username
self.password = password
self.database = database
def connect(self, host, username, password, database):
try:
connection = pymysql.connect(
host = host,
user = username,
password = password,
db = database,
charset = "utf8",
cursorclass = pymysql.cursors.DictCursor
)
return connection
except Exception as e:
print(e)
return False
def get_leaderboard(self, connection):
try:
with connection.cursor() as cursor:
sql = "SELECT (username) FROM `users`"
connection.ping(reconnect = True)
cursor.execute(sql)
connection.commit()
result = cursor.fetchall()
if (result == None):
return None
result = [ _result["username"] for _result in result ]
result = [ self.get_user_info(connection, username) for username in result ]
result = [ (_result[3], _result[0]) for _result in result ]
return result
except Exception as e:
print(e)
return None
def filter_contents(question_list, search_string = ""):
if (question_list != -1):
search_string = list(filter(("").__ne__, search_string.lower().replace("?", " ").split(" ")))
filtered_questions = []
# get the keyword with "#"
tags_list = ["general", "freshman", "sophomore", "junior", "multimedia", "network"]
tag_target_index = 0
for i in range(len(search_string)):
if "#" in search_string[i]:
if search_string[i][1:].lower() in tags_list:
tag_target_index = tags_list.index((search_string[i].replace("#", ""))) + 1
del search_string[i]
break
for question in question_list:
question_string = [ str(question["question_id"]), question["question_data"]["question"].lower(),
question["question_data"]["content"].lower(), question["question_data"]["asker"].lower() ]
# if the tag_target_index is different from the tag of the question, skip
if (tag_target_index != 0) and (tag_target_index != question["question_data"]["tag"]):
continue
# if (tag_target_index == question["question_data"]["tag"]):
if all([ any([ string in qs for qs in question_string ]) for string in search_string ]):
filtered_questions.append(copy.deepcopy(question))
return filtered_questions
def get_index_contents(self, connection):
try:
with connection.cursor() as cursor:
sql = "SELECT * FROM questions;"
connection.ping(reconnect = True)
cursor.execute(sql)
connection.commit()
result = cursor.fetchall()
result.reverse()
return databaseUtils.format_question_lists(result)
except Exception as e:
print(e)
def insert_question(self, connection, question_dict, targetTag, asker_username):
try:
tags_list = ["General", "Freshman", "Sophomore", "Junior", "Multimedia", "Network"]
with connection.cursor() as cursor:
sql = "INSERT INTO questions (asker, question, content, replies, likes, tag) VALUE ('{}', '{}', '{}', 0, 0, {});".format(
format_string(question_dict["asker"]), format_string(question_dict["question"]), format_string(question_dict["content"]), tags_list.index(targetTag) + 1
)
connection.ping(reconnect = True)
cursor.execute(sql)
connection.commit()
sql = "SELECT LAST_INSERT_ID();"
connection.ping(reconnect = True)
cursor.execute(sql)
connection.commit()
qid = cursor.fetchall()[0]["LAST_INSERT_ID()"]
if (self.construct_question_table(connection, qid) == -1):
return -1, None
# user posts + 1, points - 10
sql = "UPDATE users SET posts = posts + 1, points = points - 10 WHERE (username = '{}');".format(
format_string(asker_username)
)
connection.ping(reconnect = True)
cursor.execute(sql)
connection.commit()
return 1, qid
except Exception as e:
print(e)
return -1, None
def construct_question_table(self, connection, question_id):
try:
with connection.cursor() as cursor:
sql = "CREATE TABLE question_{} (id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY, replier VARCHAR(20), time TIMESTAMP, content VARCHAR(200));".format(
question_id
)
connection.ping(reconnect = True)
cursor.execute(sql)
connection.commit()
sql = "CREATE TABLE question_{}_upvoter (id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY, upvoter VARCHAR(20));".format(
question_id
)
connection.ping(reconnect = True)
cursor.execute(sql)
connection.commit()
return 1
except Exception as e:
print(e)
return -1
def get_question_contents(self, connection, question_id):
try:
with connection.cursor() as cursor:
sql = "SELECT * FROM question_{};".format(question_id)
connection.ping(reconnect = True)
cursor.execute(sql)
connection.commit()
replies = databaseUtils.format_reply_lists(cursor.fetchall())
sql = "SELECT * FROM questions WHERE (id = {});".format(question_id)
connection.ping(reconnect = True)
cursor.execute(sql)
connection.commit()
question = databaseUtils.format_question_lists(cursor.fetchall())[0]
return { "question" : question, "replies" : replies }
except Exception as e:
print(e)
def insert_reply(self, connection, reply_dict):
try:
# delete empty prefix and postfix
comment = reply_dict["reply_content"]
index = 0
for i in range(len(comment)):
if comment[i] != " " or comment[i] != " ":
index = i
break
comment = comment[index : len(comment)]
comment = comment[::-1]
for i in range(len(comment)):
if comment[i] != " " or comment[i] != " ":
index = i
break
comment = comment[index : len(comment)]
comment = comment[::-1]
reply_dict["reply_content"] = comment
with connection.cursor() as cursor:
sql = "INSERT INTO question_{} (replier, content) VALUE ('{}', '{}');".format(
reply_dict["question_id"], format_string(reply_dict["replier"]), format_string(reply_dict["reply_content"])
)
connection.ping(reconnect = True)
cursor.execute(sql)
connection.commit()
sql = "UPDATE questions SET replies = replies + 1 WHERE (id = {});".format(
reply_dict["question_id"]
)
connection.ping(reconnect = True)
cursor.execute(sql)
connection.commit()
# user answers + 1, points + 15 if first time reply
sql = "SELECT * FROM question_{} WHERE (replier = '{}');".format(
reply_dict["question_id"], format_string(reply_dict["replier"])
)
connection.ping(reconnect = True)
cursor.execute(sql)
connection.commit()
if (len(cursor.fetchall()) == 1):
sql = "SELECT * FROM questions WHERE (id = '{}');".format(
reply_dict["question_id"]
)
connection.ping(reconnect = True)
cursor.execute(sql)
connection.commit()
asker = cursor.fetchall()[0]["asker"]
if asker != reply_dict["replier"]:
sql = "UPDATE users SET answers = answers + 1, points = points + 15 WHERE (username = '{}');".format(
format_string(reply_dict["replier"])
)
connection.ping(reconnect = True)
cursor.execute(sql)
connection.commit()
else:
sql = "UPDATE users SET answers = answers + 1 WHERE (username = '{}');".format(
format_string(reply_dict["replier"])
)
connection.ping(reconnect = True)
cursor.execute(sql)
connection.commit()
return 1
except Exception as e:
print(e)
return -1
def upvote_question(self, connection, question_id, username):
try:
with connection.cursor() as cursor:
sql = "SELECT * FROM question_{}_upvoter WHERE (upvoter = '{}');".format(
question_id, format_string(username)
)
connection.ping(reconnect = True)
cursor.execute(sql)
connection.commit()
if (len(cursor.fetchall()) == 0):
sql = "UPDATE questions SET likes = likes + 1 WHERE (id = {});".format(question_id)
connection.ping(reconnect = True)
cursor.execute(sql)
connection.commit()
sql = "INSERT INTO question_{}_upvoter (upvoter) VALUE ('{}');".format(question_id, format_string(username))
else:
sql = "UPDATE questions SET likes = likes - 1 WHERE (id = {});".format(question_id)
connection.ping(reconnect = True)
cursor.execute(sql)
connection.commit()
sql = "DELETE FROM question_{}_upvoter WHERE (upvoter = '{}');".format(question_id, format_string(username))
connection.ping(reconnect = True)
cursor.execute(sql)
connection.commit()
return 1
except Exception as e:
print(e)
return -1
def format_question_lists(question_list):
modified_question_list = []
for qid, question in enumerate(question_list):
dictionary = {}
for key, val in question.items():
if key == "replies":
dictionary[key] = "{} {}".format(val, ("replies" if (val != 1) else "reply"))
elif key == "time":
dictionary[key] = val.strftime("%Y/%m/%d")
elif ((key == "asker") and (val == "")):
dictionary[key] = "Anonymous"
elif (key != "id"):
dictionary[key] = val
modified_question_list.append({ "question_id" : question_list[qid]["id"], "question_data" : dictionary })
return modified_question_list
def format_reply_lists(reply_list):
modified_reply_list = copy.deepcopy(reply_list)
for idx, reply in enumerate(reply_list):
del modified_reply_list[idx]["id"]
modified_reply_list[idx]["time"] = reply["time"].strftime("%Y/%m/%d")
return modified_reply_list
def login_user_check(self, connection, username, password):
try:
with connection.cursor() as cursor:
sql = "SELECT * FROM `users` WHERE `username` = %s AND `password` = %s"
connection.ping(reconnect = True)
cursor.execute(sql, (username, password))
connection.commit()
result = cursor.fetchone()
if result is not None:
return "True"
else:
return "DNE"
except Exception as e:
print(e)
return "False"
def check_username_exists(self, connection, username):
try:
with connection.cursor() as cursor:
sql = "SELECT * FROM `users` WHERE `username` = %s"
connection.ping(reconnect = True)
cursor.execute(sql, (username, ))
connection.commit()
result = cursor.fetchone()
if result is not None:
return "True"
else:
return "DNE"
except Exception as e:
print(e)
return "False"
def check_email_exists(self, connection, email):
try:
with connection.cursor() as cursor:
sql = "SELECT * FROM `users` WHERE `email` = %s"
connection.ping(reconnect = True)
cursor.execute(sql, (email, ))
connection.commit()
result = cursor.fetchone()
if result is not None:
return "True"
else:
return "DNE"
except Exception as e:
print(e)
return "False"
def add_user(self, connection, username, email, password):
try:
with connection.cursor() as cursor:
token = ''.join(random.sample(string.ascii_letters + string.digits, 10))
sql = "INSERT INTO `users` (`username`, `email`, `password`, `token`, `points`) VALUES (%s, %s, %s, %s, 100)"
connection.ping(reconnect = True)
cursor.execute(sql, (username, email, password, token))
connection.commit()
databaseUtils.send_email(email, token)
return "True"
except Exception as e:
print(e)
return "False"
def send_email(email, token):
content = MIMEMultipart()
content["subject"] = "Welcome to NDHU CSIEplus"
content["from"] = "ndhucsieplus@gmail.com"
content["to"] = email
content.attach(MIMEText("""
Hello,
Welcome to NDHU CSIEplus!
Your token is: """ + token + """,
This token is needed to change the password, please keep it safe.
"""))
with smtplib.SMTP_SSL("smtp.gmail.com", 465) as server:
try:
server.ehlo()
server.login("ndhucsieplus@gmail.com", os.environ.get('EMAILSMTP'))
server.send_message(content)
print("email send to: ", str(email))
except Exception as e:
print(e)
def change_password_user_check(self, connection, username, token):
try:
with connection.cursor() as cursor:
sql = "SELECT * FROM `users` WHERE `username` = %s AND `token` = %s"
connection.ping(reconnect = True)
cursor.execute(sql, (username, token))
connection.commit()
result = cursor.fetchone()
print(result)
if result is not None:
print("change_password_user_check TRUE")
return "True"
else:
print("change_password_user_check DNE")
return "DNE"
except Exception as e:
print(e)
return "False"
def update_password(self, connection, username, password):
try:
with connection.cursor() as cursor:
sql = "UPDATE `users` SET password = %s WHERE username = %s"
connection.ping(reconnect = True)
cursor.execute(sql, (password, username))
connection.commit()
return "True"
except Exception as e:
print(e)
return "False"
def get_user_info(self, connection, username):
try:
with connection.cursor() as cursor:
sql = "SELECT * FROM `users` WHERE `username` = %s"
connection.ping(reconnect = True)
cursor.execute(sql, (username, ))
connection.commit()
result = cursor.fetchone()
if result is not None:
return result['username'], result['email'], result['password'], result['points'], result['posts'], result['answers']
else:
return "DNE"
except Exception as e:
print(e)
return "False"