Added ability to register, log in and add averages

.env

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+DATABASE_URL=postgresql+psycopg2:https:///matiason
+SECRET_KEY=2ffcaeeb61ba9a0b031090ef2604d975

app.py

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+from flask import Flask
+from os import getenv
+from flask import render_template, redirect, request, session
+from flask_sqlalchemy import SQLAlchemy
+from werkzeug.security import check_password_hash, generate_password_hash
+
+
+app = Flask(__name__)
+app.secret_key = getenv("SECRET_KEY")
+app.config["SQLALCHEMY_DATABASE_URI"] = getenv("DATABASE_URL")
+db = SQLAlchemy(app)
+
+@app.route("/")
+def index():
+ return redirect("/mainpage")
+
+@app.route("/register", methods = ["POST", "GET"])
+def register():
+
+ if request.method == "GET":
+ return render_template("register.html")
+ if request.method == "POST":
+ username = request.form["username"]
+ password = request.form["password"]
+ sql = "INSERT INTO users (username, password) VALUES (:username, :password)"
+ hash_value = generate_password_hash(password)
+ db.session.execute(sql, {"username": username, "password": hash_value})
+ db.session.commit()
+ return redirect("/")
+
+@app.route("/login", methods = ["POST", "GET"])
+def login():
+
+ if request.method == "GET":
+ return render_template("login.html")
+ if request.method == "POST":
+ username = request.form["username"]
+ password = request.form["password"]
+ session["username"] = username
+ sql = "SELECT id, password FROM users WHERE username=:username"
+ result = db.session.execute(sql, {"username": username})
+ user = result.fetchone()
+ if not user:
+ return render_template("login.html", error="Incorrect username or password")
+ else:
+ hash_value = user.password
+ if check_password_hash(hash_value, password):
+ return redirect("/")
+ return redirect("/login")
+
+@app.route("/logout")
+def logout():
+ del session["username"]
+ return redirect("/")
+
+@app.route("/mainpage", methods = ["POST", "GET"])
+def mainpage():
+ if request.method == "GET":
+ if session.get("username"):
+ username = session["username"]
+ user = db.session.execute("SELECT id FROM users WHERE username=:username", {"username": username})
+ user_id = user.fetchone()[0]
+ averages = db.session.execute("SELECT average_date, average FROM averages WHERE user_id=:user_id", {"user_id": user_id})
+ return render_template("mainpage.html", avgs=averages)
+ else:
+ return render_template("mainpage.html")
+ if request.method == "POST":
+ average = request.form["addaverage"]
+ username = session["username"]
+ user = db.session.execute("SELECT id FROM users WHERE username=:username", {"username": username})
+ user_id = user.fetchone()[0]
+ sql = "INSERT INTO averages (average_date, user_id, average) VALUES (current_date, :user_id, :average)"
+ db.session.execute(sql, {"user_id": user_id, "average": average})
+ db.session.commit()
+ return redirect("/")

schema.sql

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+CREATE TABLE users (id SERIAL PRIMARY KEY, username TEXT UNIQUE, password TEXT);
+CREATE TABLE averages (id SERIAL PRIMARY KEY, average_date DATE, user_id INTEGER REFERENCES users, average REAL);
+CREATE TABLE games (id SERIAL PRIMARY KEY, game_date DATE, player_one INTEGER REFERENCES users, player_two INTEGER REFERENCES users, result INTEGER);
+

templates/index.html

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+<title>Darts scores</title>
+<h1>Darts scores</h1>
+{% if session.username %}
+<p>Olet kirjautunut nimellä {{ session.username }}</p>
+<a href="/logout">Kirjaudu ulos</a>
+{% else %}
+<form action="/register" method="POST">
+<p>Tunnus:<br>
+<input type="text" name="username"></p>
+<p>Salasana:<br>
+<input type="password" name="password"></p>
+<input type="submit" value="Kirjaudu">
+</form>
+{% endif %}

templates/login.html

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+<title>Darts scores</title>
+<h1>Darts scores</h1>
+<p>{{ error }}</p>
+<form action="/login" method="POST">
+<p>Username:<br>
+<input type="text" name="username"></p>
+<p>Password:<br>
+<input type="password" name="password"></p>
+<input type="submit" value="Log in">
+</form>
+<p>Register a new account <a href="/register"><b>HERE</b></a></p>

templates/mainpage.html

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+{% if session.username %}
+<p>You are logged in as <b>{{ session.username }}</b> <a href="/logout">Log out</a></p>
+<form action="/mainpage" method="POST">
+Add an average: <input type="number" step="0.1" min=0 max=180 name="addaverage">
+<br>
+<input type="submit" value="Submit">
+</form>
+<h2>Your averages:</h2>
+{% for avg in avgs %}
+<p>{{ avg.average_date }} {{ avg.average }}</p>
+{% endfor %}
+{% else %}
+<a href="/login">Log in</a>
+{% endif %}

templates/register.html

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+<title>Darts scores</title>
+<h1>Darts scores</h1>
+<form action="/register" method="POST">
+<p>Username:<br>
+<input type="text" name="username"></p>
+<p>Password:<br>
+<input type="password" name="password"></p>
+<input type="submit" value="Register">
+</form>