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account.py
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from flask import Blueprint, render_template, request, redirect, session, flash
from werkzeug.security import check_password_hash, generate_password_hash
from helpers import login_required, connect_db, username_validation, del_temp_files
"""
Modular Applications with Blueprints
https://flask.palletsprojects.com/en/2.2.x/blueprints/
"""
account_page = Blueprint('account_page', __name__, template_folder='templates')
@account_page.route("/login", methods=["GET", "POST"])
def login():
"""Log user in"""
# Ensure that user log out first before log in
if session.get("user_id") is not None:
return render_template("error.html", error="please log out first")
# User reached route via POST (as by submitting a form via POST)
if request.method == "POST":
# Ensure username and password was submitted
if not request.form.get("username"):
return render_template("error.html", error="must provide username")
if not request.form.get("password"):
return render_template("error.html", error="must provide password")
# Query database for username
con, cur = connect_db()
rows = cur.execute("SELECT * FROM users WHERE username=:name", {"name": request.form.get("username").lower()})
rows = list(rows.fetchall())
# Ensure username exists and password is correct
if len(rows) != 1 or not check_password_hash(rows[0][2], request.form.get("password")):
con.close()
return render_template("error.html", error="invalid username or password")
# Remember which user has logged in
session["user_id"] = rows[0][0]
# Redirect user to home page
con.close()
return redirect("/")
# User reached route via GET (as by clicking a link or via redirect)
else:
return render_template("login.html")
@account_page.route("/logout")
@login_required
def logout():
"""Forget user id"""
# Delete temp files
del_temp_files()
# Pop session
if session.get("user_id") is not None:
session.pop("user_id")
return redirect("/")
@account_page.route("/register", methods=["GET", "POST"])
def register():
"""Register user"""
# Ensure that user log out first before register
if session.get("user_id") is not None:
return render_template("error.html", error="please log out first")
# User reached route via POST
if request.method == "POST":
# Ensure username and password was submitted
username = request.form.get("username")
if not username:
return render_template("error.html", error="must provide username")
password = request.form.get("password")
if not password or not request.form.get("confirmation"):
return render_template("error.html", error="must provide password")
# Check length
if len(username) > 26 or len(username) < 3:
return render_template("error.html", error="too long/short")
if len(password) < 8:
return render_template("error.html", error="password at least 8 chars length")
# Confirmation
if password != request.form.get("confirmation"):
return render_template("error.html", error="password doesn't match")
# Username Validation
validity = username_validation(username)
if validity == 1:
return render_template("error.html", error="invalid char(s)")
elif validity == 2:
return render_template("error.html", error="symbols are not allowed (except: _ )")
del username
username = request.form.get("username").lower()
# Query data
con, cur = connect_db()
users_database = cur.execute("SELECT username FROM users")
# Ensure submitted username not already taken
for user in users_database.fetchall():
if user[0] == username:
con.close()
return render_template("error.html", error="username is already taken")
# Add them to users table in database
hash = generate_password_hash(password)
cur.execute("INSERT INTO users (username, hash) VALUES (?, ?)", (username, hash))
con.commit()
# Set session
session["user_id"] = cur.execute("SELECT * FROM users WHERE username = ?", (username,)).fetchall()[0][0]
con.close()
return redirect("/")
# User reached route via GET
else:
return render_template("register.html")
@account_page.route("/settings", methods=["GET", "POST"])
@login_required
def settings():
"""Settings"""
if request.method == "POST":
if request.form["button"] == "Change Username":
return redirect("/settings/username")
elif request.form["button"] == "Change Password":
return redirect("/settings/password")
elif request.form["button"] == "Delete Account":
return redirect("/settings/delete")
return render_template("settings.html")
@account_page.route("/settings/password", methods=["GET", "POST"])
@login_required
def changepass():
"""Change the password"""
if request.method == "POST":
# Ensure all form was submitted
if not request.form.get("old_password"):
return render_template("error.html", error="must provide old password")
if not request.form.get("new_password") or not request.form.get("confirmation"):
return render_template("error.html", error="must provide new password")
# Password at least 8 chars length
if len(request.form.get("new_password")) < 8:
return render_template("error.html", error="password at least 8 chars length")
# Confirmation
if request.form.get("new_password") != request.form.get("confirmation"):
return render_template("error.html", error="password doesn't match")
# Query database by session id
con, cur = connect_db()
user = cur.execute("SELECT * FROM users WHERE id = ?", (session["user_id"],))
user = list(user.fetchall())
# Check inputted old password
if not check_password_hash(user[0][2], request.form.get("old_password")):
con.close()
return render_template("error.html", error="old password doesn't match")
# Replace (change) the password into database
hashes_password = generate_password_hash(request.form.get("new_password"))
cur.execute("UPDATE users SET hash = ? WHERE id = ?", (hashes_password, session["user_id"]))
con.commit()
con.close()
flash("Password was changed successfully!")
return redirect("/settings/password")
else:
return render_template("changepass.html")
@account_page.route("/settings/username", methods=["GET", "POST"])
@login_required
def changeusername():
if request.method == "POST":
# Ensure form submitted
new = request.form.get("new_username")
if not new:
return render_template("error.html", error="type your new username")
# Username Validation
validity = username_validation(new)
if validity == 1:
return render_template("error.html", error="invalid char(s)")
elif validity == 2:
return render_template("error.html", error="symbols are not allowed (except: _ )")
del new
new = request.form.get("new_username").lower()
# Connect to sqlite3 db
con, cur = connect_db()
# Check apakan new username sudah ada di database atau belum
old_user = cur.execute("SELECT username FROM users WHERE username = ?", (new,))
old_user = list(old_user.fetchall())
# Jika ada, return error
if not old_user == []:
con.close()
return render_template("error.html", error="username is already taken")
# Jika tidak ada, ganti username
cur.execute("UPDATE users SET username = ? WHERE id = ?", (new, session["user_id"]))
con.commit()
con.close()
flash("Username was changed successfully!")
return redirect("/settings/username")
else:
con, cur = connect_db()
user = cur.execute("SELECT username FROM users WHERE id = ?", (session["user_id"],)).fetchall()[0][0]
con.close()
return render_template("changeusername.html", user=user)
@account_page.route("/settings/delete", methods=["GET", "POST"])
@login_required
def delete_account():
"""Delete username, hash, records from database"""
# User reached route via GET
if request.method == "GET":
return render_template("delete.html")
# User reached route via POST
else:
# If user click the button
if request.form.get("del"):
# Password verif
if not request.form.get("password"):
return render_template("error.html", error="must provide password")
if request.form.get("sayonara") != "sayonara":
return render_template("error.html", error="please type 'sayonara'")
# Query user data from database
con, cur = connect_db()
rows = cur.execute("SELECT * FROM users WHERE id = ?", (session["user_id"],))
# Ensure password is correct
if not check_password_hash(rows.fetchall()[0][2], request.form.get("password")):
return render_template("error.html", error="invalid password")
# Delete all data !!!
# Delete temporary files
del_temp_files()
# Delete all records
cur.execute("DELETE FROM records WHERE user_id = ?", (session["user_id"],))
# Delete username and hash, but keep the primary key
cur.execute("UPDATE users SET username = '-', hash = '-' WHERE id = ?", (session["user_id"],))
# Commit and close connection
con.commit()
con.close()
# Clear session
session.clear()
return redirect("/")
else:
return render_template("error.html", error="guess what")