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app.py
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app.py
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import os
from cs50 import SQL
from flask import Flask, flash, redirect, render_template, request, session
from flask_session import Session
from helpers import login_required
from werkzeug.security import check_password_hash, generate_password_hash
app = Flask(__name__)
# Ensure templates are auto-reloaded
app.config["TEMPLATES_AUTO_RELOAD"] = True
# Configure session to use filesystem (instead of signed cookies)
app.config["SESSION_PERMANENT"] = False
app.config["SESSION_TYPE"] = "filesystem"
Session(app)
# Configure CS50 Library to use SQLite database
uri = os.getenv("DATABASE_URL")
if uri.startswith("postgres://"):
uri = uri.replace("postgres://", "postgresql://")
db = SQL(uri)
#Ensure responses aren't cached
@app.after_request
def after_request(response):
response.headers["Cache-Control"] = "no-cache, no-store, must-revalidate"
response.headers["Expires"] = 0
response.headers["Pragma"] = "no-cache"
return response
SUBJECTS = ["Ciencias Naturales", "Ciencias Sociales", "Lengua", "Matemáticas", "Varios", "Ciencia Ficción", "Poesía"]
# REGISTER
#-------------------------------------------------------------------------------------------------
@app.route("/register", methods=["GET", "POST"])
def register():
if request.method == "POST":
username = request.form.get("username")
password = request.form.get("password")
confirmation = request.form.get("confirmation")
# check that none of the inputs were left blank.
if not request.form.get("username") or not request.form.get("password") or not request.form.get("confirmation"):
return render_template("register.html", error = 1, message = "¡Debes completar todos los campos!")
# check that the name isn't already in use.
same_username = db.execute("SELECT COUNT(username) FROM users WHERE username = ?", username)
same_username = same_username[0]["count"]
if same_username != 0:
return render_template("register.html", error = 1, message = "¡Nombre de usuario ya en uso!")
# check that the password has at least six digits.
if len(password) < 6:
return render_template("register.html", error = 1, message = "¡La contraseña debe tener al menos seis caracteres!")
# check that the password and its confirmation match.
if password != confirmation:
return render_template("register.html", error = 1, message = "¡La contraseña y su confirmación no coinciden!")
# hash password and insert new user into database.
password_hash = generate_password_hash(password)
db.execute("INSERT INTO users(username, hash) VALUES(?, ?)", username, password_hash)
# insert users preferred language to the database.
language = request.form.get("languages")
db.execute("UPDATE users SET language = ? WHERE username = ?", language, username)
# insert principal subjects into subjects table for current user.
user_id = db.execute("SELECT id FROM users WHERE username = ?", username)
user_id = user_id[0]["id"]
for subject in SUBJECTS:
db.execute("INSERT INTO subjects(user_id, subject) VALUES (?, ?)", user_id, subject)
# remember user in a session.
session["user_id"] = user_id
return redirect("/")
else:
return render_template("register.html")
#-------------------------------------------------------------------------------------------------
# LOGIN
#-------------------------------------------------------------------------------------------------
@app.route("/login", methods=["GET", "POST"])
def login():
# Forget any user_id
session.clear()
# If user reached route via POST:
if request.method == "POST":
# Ensure both username and password were submitted
if not request.form.get("username") or not request.form.get("password"):
return render_template("login.html", error = 1, message = "¡Debes completar todos los campos!")
# Query database for username
rows = db.execute("SELECT * FROM users WHERE username = ?", request.form.get("username"))
# Ensure username exists and password is correct
if len(rows) != 1 or not check_password_hash(rows[0]["hash"], request.form.get("password")):
return render_template("login.html", error = 1, message = "¡Usuario o contraseña invalidos!")
# Remember which user has logged in
session["user_id"] = rows[0]["id"]
# Redirect user to home page
return redirect("/")
# Else, if user reached route via GET:
else:
return render_template("login.html")
#-------------------------------------------------------------------------------------------------
# LOGOUT
#-------------------------------------------------------------------------------------------------
@app.route("/logout")
def logout():
# Forget any user_id
session.clear()
# Redirect user to login form
return redirect("/")
#-------------------------------------------------------------------------------------------------
# INDEX
#-------------------------------------------------------------------------------------------------
@app.route("/", methods=["GET", "POST"])
@login_required
def index():
# get user's id and username
user_id = getUserId()
username = getUsername()
# choose appropiate template regarding language translations.
template = translateTemplate("index", username)
# If user reached route via POST:
if request.method == "POST":
# Order by ID
if request.form.get("order_by") == "ID":
books = db.execute("SELECT * FROM books WHERE username = ? ORDER BY book_id", username)
return render_template(template, books = books, username = username)
# Order by subject
Subject_translations = ["Tema", "Subject", "Tópico"]
if request.form.get("order_by") in Subject_translations:
books = db.execute("SELECT * FROM books WHERE username = ? ORDER BY main_subject", username)
return render_template(template, books = books, username = username)
# Order by title
Title_translations = ["Título", "Title"]
if request.form.get("order_by") in Title_translations:
books = db.execute("SELECT * FROM books WHERE username = ? ORDER BY title", username)
return render_template(template, books = books, username = username)
# Order by author
Author_translations = ["Autor", "Author"]
if request.form.get("order_by") in Author_translations:
books = db.execute("SELECT * FROM books WHERE username = ? ORDER BY author", username)
return render_template(template, books = books, username = username)
# Order by colour
Colour_translations = ["Color", "Colour", "Cor"]
if request.form.get("order_by") in Colour_translations:
books = db.execute("SELECT * FROM books WHERE username = ? ORDER BY colour", username)
return render_template(template, books = books, username = username)
# Order by condition
Condition_translations = ["Condición", "Condition", "Estado"]
if request.form.get("order_by") in Condition_translations:
books = db.execute("SELECT * FROM books WHERE username = ? ORDER BY condition", username)
return render_template(template, books = books, username = username)
# Order by year of release
Year_translations = ["Año", "Year", "Ano"]
if request.form.get("order_by") in Year_translations:
books = db.execute("SELECT * FROM books WHERE username = ? ORDER BY year", username)
return render_template(template, books = books, username = username)
# Order by type of cover
Cover_translations = ["Tapa", "Cover", "Capa"]
if request.form.get("order_by") in Cover_translations:
books = db.execute("SELECT * FROM books WHERE username = ? ORDER BY cover", username)
return render_template(template, books = books, username = username)
# Else, if user reached route via GET:
else:
# Get books to show within the table
books = db.execute("SELECT * FROM books WHERE username = ?", username)
# Show the appropiate alert.
if session.get("successfully_deleted") == 1:
session.pop("successfully_deleted", None)
return render_template(template, books = books, username = username, success = 2)
elif session.get("successfully_added"):
if not session.get("success"):
session.pop("successfully_added", None)
return render_template(template, books = books, username = username, success = 0)
else:
book_id = session["book_id"]
session.pop("success", None)
session.pop("book_id", None)
session.pop("successfully_added", None)
return render_template(template, books = books, success = 1, username = username, book_id = book_id)
else:
return render_template(template, books = books, username = username)
#-------------------------------------------------------------------------------------------------
# ADD BOOK
#-------------------------------------------------------------------------------------------------
@app.route("/add", methods=["GET", "POST"])
@login_required
def add():
# get user's id and username
user_id = getUserId()
username = getUsername()
# get list of subjects
list_of_subjects = db.execute("SELECT subject FROM subjects JOIN users ON users.id = subjects.user_id WHERE user_id = ?", user_id)
subjects = list()
for subject in list_of_subjects:
subjects.append(subject["subject"])
# choose appropiate template regarding language translations.
template = translateTemplate("add", username)
# If user reached route via POST:
if request.method == "POST":
# Check that the user filled in the required fields
if not request.form.get("title") or not request.form.get("subjects"):
return render_template(template, subjects = subjects, error = 1, username = username)
# store user's responses in variables
title = request.form.get("title")
colour = request.form.get("colour")
year = request.form.get("year")
year = str(year)
condition = request.form.get("condition")
form_subjects = request.form.getlist("subjects_opt")
cover = request.form.get("cover")
author = request.form.get("author")
main_subject = request.form.get("subjects")
# Convert any optional fields that weren't filled to "N/A"
if len(form_subjects) == 3:
subject0 = form_subjects[0]
subject1 = form_subjects[1]
subject2 = form_subjects[2]
elif len(form_subjects) == 2:
subject0 = form_subjects[0]
subject1 = form_subjects[1]
subject2 = "N/A"
elif len(form_subjects) == 1:
subject0 = form_subjects[0]
subject1 = "N/A"
subject2 = "N/A"
else:
subject0 = "N/A"
subject1 = "N/A"
subject2 = "N/A"
if not colour:
colour = "N/A"
if not year:
year = "N/A"
if not condition:
condition = "N/A"
if not cover:
cover = "N/A"
if not author:
author = "N/A"
# get the number to print to the spine of the book
book_id = db.execute("SELECT COUNT(*) FROM books WHERE username = ?", username)
book_id = book_id[0]["count"]
# get the offset caused by deletions.
offset = db.execute('SELECT "offset" FROM users WHERE username = ?', username)
offset = offset[0]["offset"]
book_id = book_id + offset
# insert book info into the book table within the database;
query0 = "INSERT INTO books(username, book_id, title, main_subject, subject0, subject1, subject2, author,"
query1 = "colour, year, condition, cover) VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)"
query = query0 + query1
db.execute(query, username, book_id, title, main_subject, subject0, subject1, subject2, author, colour, year, condition, cover)
session["successfully_added"] = 1
session["success"] = 1
session["book_id"] = book_id
return redirect("/")
# Else, if user reached route via GET:
else:
return render_template(template, subjects = subjects, subjects_opt = subjects, username = username)
#-------------------------------------------------------------------------------------------------
#SEARCH FOR A BOOK
#-------------------------------------------------------------------------------------------------
@app.route("/search", methods=["GET", "POST"])
@login_required
def search():
# get user's id and username
user_id = getUserId()
username = getUsername()
# get list of subjects
list_of_subjects = db.execute("SELECT subject FROM subjects JOIN users ON users.id = subjects.user_id WHERE users.id = ?", user_id)
subjects = list()
for subject in list_of_subjects:
subjects.append(subject["subject"])
# choose appropiate template regarding language translations.
template = translateTemplate("search", username)
# If user reached route via POST:
if request.method == "POST":
# Delete books in case the user wants to.
DeleteButton = ["Borrar libro/s seleccionados", "Borrar libro seleccionado", "Delete selected book/s",
"Delete selected book", "Apagar livro/s selecionados", "Apagar livro selecionados"]
if request.form.get("delete") in DeleteButton:
#selected = request.form.get("deletethis")
if request.form.get("deletethis") == None:
return render_template(template, subjects = subjects, error = 1, username = username)
todelete = request.form.getlist("deletethis")
for book in todelete:
db.execute("DELETE FROM books WHERE username = ? AND book_id = ?", username, book)
#update offset
offset = db.execute('SELECT "offset" FROM users WHERE username = ?', username)
offset = offset[0]["offset"]
updated_offset = offset + 1
db.execute('UPDATE users SET "offset" = ? WHERE username = ?', updated_offset, username)
session["successfully_deleted"] = 1
return redirect("/")
# Check that the user filled in the required fields
if not request.form.get("title") or not request.form.get("subjects"):
return render_template(template, subjects = subjects, error = 2, username = username)
# store user's responses in variables
title = request.form.get("title")
colour = request.form.get("colour")
year = request.form.get("year")
year = str(year)
condition = request.form.get("condition")
form_subjects = request.form.getlist("subjects_opt")
cover = request.form.get("cover")
author = request.form.get("author")
main_subject = request.form.get("subjects")
# Convert any optional fields that weren't filled to "N/A"
if len(form_subjects) == 3:
subject0 = form_subjects[0]
subject1 = form_subjects[1]
subject2 = form_subjects[2]
elif len(form_subjects) == 2:
subject0 = form_subjects[0]
subject1 = form_subjects[1]
subject2 = "N/A"
elif len(form_subjects) == 1:
subject0 = form_subjects[0]
subject1 = "N/A"
subject2 = "N/A"
else:
subject0 = "N/A"
subject1 = "N/A"
subject2 = "N/A"
if not colour:
colour = "N/A"
if not year:
year = "N/A"
if not condition:
condition = "N/A"
if not cover:
cover = "N/A"
if not author:
author = "N/A"
# "%" represents zero or more characters, I use it in case the user didn't type the full name
title = "%" + title + "%"
author = "%" + author + "%"
# choose appropiate template regarding language translations.
template = translateTemplate("found", username)
#check if a book within the database meets the exact requirements provided
subjects_list = [main_subject, subject0, subject1, subject2]
query0 = "SELECT * FROM books WHERE title LIKE ? AND username = ? AND main_subject IN (?) AND subject0 IN (?) AND subject1 IN (?) AND subject2 IN (?) AND colour = ?"
query1 = " AND year = ? AND condition = ? AND cover = ? AND author LIKE ?"
query = query0 + query1
check_book = db.execute(query, title, username, subjects_list, subjects_list, subjects_list, subjects_list, colour, year, condition, cover, author)
if len(check_book) != 0:
attempt = 10
amount_of_books_found = len(check_book)
return render_template(template, books = check_book, amount = amount_of_books_found, attempt = attempt, username = username)
# If unable to find a book, check again but this time only check for title and main subject, in case the user made a mistake
query = "SELECT * FROM books WHERE title LIKE ? AND username = ? AND main_subject IN (?)"
check_book = db.execute(query, title, username, subjects_list)
if len(check_book) != 0:
attempt = 11
amount_of_books_found = len(check_book)
return render_template(template, books = check_book, amount = amount_of_books_found, attempt = attempt, username = username)
# If still unable to find a book, check for the last time, this time only check for a similar title
query = "SELECT * FROM books WHERE title LIKE ? AND username = ?"
check_book = db.execute(query, title, username)
if len(check_book) != 0:
attempt = 12
amount_of_books_found = len(check_book)
return render_template(template, books = check_book, amount = amount_of_books_found, attempt = attempt, username = username)
else:
attempt = 0
amount_of_books_found = len(check_book)
return render_template(template, books = check_book, amount = amount_of_books_found, attempt = attempt, username = username)
# Else, if user reached route via GET:
else:
return render_template(template, subjects = subjects, username = username)
#-------------------------------------------------------------------------------------------------
# SETTINGS
#-------------------------------------------------------------------------------------------------
@app.route("/settings", methods=["GET", "POST"])
@login_required
def settings():
# get user's id and username
user_id = getUserId()
username = getUsername()
# choose appropiate template regarding language translations.
template = translateTemplate("settings", username)
# If user reached route via POST:
if request.method == "POST":
# Allows users to insert a new subject
if request.form.get("new_subject") != None:
if not request.form.get("new_subject"):
return redirect("/")
new_subject = request.form.get("new_subject")
db.execute("INSERT INTO subjects(user_id, subject) VALUES(?, ?)", user_id, new_subject)
return render_template(template, username = username, alert = 0, message = "Tema agregado correctamente")
# Allows users to change their password
if request.form.get("old_pass") != None:
oldpass = request.form.get("old_pass")
newpass = request.form.get("new_pass")
newpass_confirm = request.form.get("new_pass_confirm")
user_info = db.execute("SELECT * FROM users WHERE username = ?", username)
user_hash = user_info[0]["hash"]
if check_password_hash(user_hash, oldpass) != True:
return render_template(template, username = username, alert = 1, message = "¡Contraseña vieja incorrecta!")
else:
if newpass != newpass_confirm:
return render_template(template, username = username, alert = 2, message = "¡La nueva contraseña y su confirmación no coinciden!")
elif len(newpass) < 6:
return render_template(template, username = username, alert = 3, message = "¡La contraseña debe ser de al menos 6 caracteres!")
else:
newpass_hash = generate_password_hash(newpass)
db.execute("UPDATE users SET hash = ? WHERE username = ?", newpass_hash, username)
return render_template(template, username = username, alert = 4, message = "¡Contraseña actualizada correctamente!")
# Allows users to add or change their secret question and answer (in case they forget their password, they can use this to get access to their account.)
if request.form.get("reset_question") != None:
question = request.form.get("reset_question")
answer = request.form.get("reset_answer")
db.execute("UPDATE users SET reset_question = ? WHERE username = ?", question, username)
db.execute("UPDATE users SET reset_answer = ? WHERE username = ?", answer, username)
return render_template(template, username = username, alert = 5, message = "¡Pregunta clave agregada correctamente!")
if request.form.get("languages") != None:
language = request.form.get("languages")
db.execute("UPDATE users SET language = ? WHERE username = ?", language, username)
# Update translation after the change.
template = translateTemplate("settings", username)
return render_template(template, username = username, alert = 6, message = "¡Lenguaje cambiado correctamente! HAY QUE TRADUCIR ESTO")
# Else, if user reached route via GET:
else:
return render_template(template, username = username)
#-------------------------------------------------------------------------------------------------
# RESET PASSWORD
#--------------------------------------------------------------------------------------------------
@app.route("/reset_password", methods=["GET", "POST"])
def reset_password():
# If user reached route via POST:
if request.method == "POST":
# Allows users to reset their password using their secret question.
if request.form.get("username") != None:
reset_username = request.form.get("username")
is_in_database = db.execute("SELECT username FROM users WHERE username = ?", reset_username)
try:
is_in_database = is_in_database[0]["username"]
except IndexError:
return render_template("reset.html", step = 0, error = 1, message = "Usuario inexistente en base de datos")
reset_question = db.execute("SELECT reset_question FROM users WHERE username = ?", reset_username)
reset_question = reset_question[0]["reset_question"]
if reset_question == "N/A":
return render_template("login.html", error = 1, message = "¡No configuraste pregunta clave!")
else:
global global_reset_username
global_reset_username = reset_username
return render_template("reset.html", step = 1, username = reset_username, reset_question = reset_question)
if request.form.get("reset_answer") != None:
username = global_reset_username
reset_answer = db.execute("SELECT reset_answer FROM users WHERE username = ?", username)
reset_answer = reset_answer[0]["reset_answer"]
form_answer = request.form.get("reset_answer")
if form_answer == reset_answer:
return render_template("reset.html", step = 2)
else:
reset_question = db.execute("SELECT reset_question FROM users WHERE username = ?", username)
reset_question = reset_question[0]["reset_question"]
return render_template("reset.html", step = 1, username = username, reset_question = reset_question, error = 1, message = "¡Respuesta incorrecta!")
if request.form.get("reset_password") != None:
newpass = request.form.get("reset_password")
confirmpass = request.form.get("confirm_reset_password")
# check that the password has at least six digits.
if len(newpass) < 6:
return render_template("reset.html", step = 2, error = 1, message = "¡La contraseña debe tener al menos seis caracteres!")
# check that the password and its confirmation match.
if newpass != confirmpass:
return render_template("reset.html", step = 2, error = 1, message = "¡La contraseña y su confirmación no coinciden!")
# hash password and insert new password into database.
newpass_hash = generate_password_hash(newpass)
username = global_reset_username
db.execute("UPDATE users SET hash = ? WHERE username = ?", newpass_hash, username)
return render_template("login.html", error = 0, message = "¡Contraseña cambiada satisfactoriamente!")
# Else, if user reached route via GET:
else:
return render_template("reset.html", step = 0)
#-------------------------------------------------------------------------------------------------
# ABOUT
#-------------------------------------------------------------------------------------------------
@app.route("/about")
# Just shows the information page.
def about():
# get user's id and username
username = getUsername()
# choose appropiate template regarding language translations.
template = translateTemplate("about", username)
return render_template(template, username = username)
#-------------------------------------------------------------------------------------------------
def translateTemplate(template, username):
language = db.execute("SELECT language FROM users WHERE username = ?", username)
language = language[0]["language"]
translated_template = template + "-" + language + ".html"
return translated_template
def getUsername():
user_id = session["user_id"]
username = db.execute("SELECT username FROM users WHERE id = ?", user_id)
username = username[0]["username"]
return username
def getUserId():
user_id = session["user_id"]
return user_id