user login scaffolding

library/application/user/forgotpassword.py

@@ -0,0 +1,58 @@
+from uuid import uuid1
+from datetime import datetime
+from sqlalchemy.exc import (
+    DataError,
+    DatabaseError,
+    InterfaceError,
+    InvalidRequestError,
+)
+from flask import render_template
+from flask_mail import Message
+
+from usermodel import User
+from forms.forgotpasswordform import ForgotPasswordForm
+from app import db
+
+
+def ForgotPassword(mail):
+    forgotpasswordform = ForgotPasswordForm()
+    if forgotpasswordform.validate_on_submit():
+        user = User.query.filter_by(
+            email=forgotpasswordform.email.data
+        ).first()
+        if user is not None:
+            resethash = AddResetPasswordHash(user, forgotpasswordform)
+            ResetPassWordMessage(user, resethash, mail)
+        forgotpasswordform.email.errors.append(
+            f"""If {forgotpasswordform.email.data} exists, an email is send with
+            a password reset link. (If your inbox doesn't
+            contain any new mail, please check your spam folder.)"""
+        )
+    return render_template(
+        "forgotpassword.html", forgotpasswordform=forgotpasswordform
+    )
+
+
+def AddResetPasswordHash(user, forgotpasswordform):
+    resethash = uuid1().hex
+    try:
+        user.resettime = datetime.now()
+        user.resethash = resethash
+        db.session.commit()
+    except (InvalidRequestError, DataError, InterfaceError, DatabaseError):
+        forgotpasswordform.email.errors.append("Something went wrong!")
+        db.session.rollback()
+    return resethash
+
+
+def ResetPassWordMessage(user, resethash, mail):
+    msg = Message(
+        "Forgotten Password ",
+        sender=("mailer", "test@this.com"),
+        recipients=[user.email],
+    )
+    msg.html = f"""{user.username} has requested a password reset for
+libary website.<br><hr>
+<a href='http://localhost:5000/resetpassword/{resethash}'>Click here to
+reset your password.</a>"""
+    mail.send(msg)

library/application/user/loginuser.py

@@ -0,0 +1,36 @@
+from flask import (
+    render_template,
+    redirect,
+    request,
+    flash,
+    url_for,
+    abort,
+)
+from usermodel import User
+from forms.loginform import LoginForm
+from flask_login import login_user
+from flask_bcrypt import check_password_hash
+
+
+def LoginUser():
+    loginform = LoginForm()
+    if loginform.validate_on_submit():
+        try:
+            user = User.query.filter_by(email=loginform.email.data).first()
+            if user is None:
+                loginform.password.errors.append("Invalid email or password!")
+                return render_template("login.html", loginform=loginform)
+            if check_password_hash(user.password, loginform.password.data):
+                login_user(user)
+                flash("Logged in successfully.", "success")
+                next = request.args.get("next")
+                if next is not None and not is_safe_url(next):  # noqa: F821
+                    return abort(400)
+                return redirect(next or url_for("index"))
+            else:
+                flash("Invalid email or password!", "danger")
+                loginform.password.errors.append("Invalid email or password!")
+                return render_template("login.html", loginform=loginform)
+        except Exception as e:
+            flash(e, "danger")
+    return render_template("login.html", loginform=loginform)

library/application/user/registeruser.py

@@ -0,0 +1,70 @@
+from flask import (
+    render_template,
+    redirect,
+    flash,
+    url_for,
+)
+from sqlalchemy.exc import (
+    IntegrityError,
+    DataError,
+    DatabaseError,
+    InterfaceError,
+    InvalidRequestError,
+)
+from werkzeug.routing import BuildError
+from usermodel import User
+from forms.registerform import RegisterForm
+from flask_login import login_user
+from flask_bcrypt import generate_password_hash
+from app import db
+
+
+def RegisterUser():
+    registerform = RegisterForm()
+    if registerform.validate_on_submit():
+        try:
+            username = registerform.username.data
+            email = registerform.email.data
+            password = registerform.confirmpassword.data
+
+            newuser = User(
+                username=username,
+                email=email,
+                password=generate_password_hash(password),
+            )
+
+            db.session.add(newuser)
+            db.session.commit()
+            flash("Account Succesfully created", "success")
+            login_user(newuser)
+            return redirect(url_for("index"))
+
+        except InvalidRequestError:
+            db.session.rollback()
+            registerform.email.errors.append("Something went wrong!")
+            flash("Something went wrong!", "danger")
+        except IntegrityError:
+            db.session.rollback()
+            registerform.email.errors.append("User already exists!")
+            flash("User already exists!", "warning")
+        except DataError:
+            db.session.rollback()
+            registerform.email.errors.append("Invalid Entry")
+            flash("Invalid Entry", "warning")
+        except InterfaceError:
+            db.session.rollback()
+            registerform.email.errors.append(
+                "Error connecting to the database"
+            )
+            flash("Error connecting to the database", "danger")
+        except DatabaseError:
+            db.session.rollback()
+            registerform.email.errors.append(
+                "Error connecting to the database"
+            )
+            flash("Error connecting to the database", "danger")
+        except BuildError:
+            db.session.rollback()
+            registerform.email.errors.append("Unknown error occured!")
+            flash("An error occured !", "danger")
+    return render_template("register.html", registerform=registerform)

library/application/user/resetpassword.py

@@ -0,0 +1,81 @@
+from datetime import datetime
+from flask import (
+    render_template,
+    redirect,
+    flash,
+    url_for,
+)
+from sqlalchemy.exc import (
+    IntegrityError,
+    DataError,
+    DatabaseError,
+    InterfaceError,
+    InvalidRequestError,
+)
+from werkzeug.routing import BuildError
+from usermodel import User
+from forms.resetpasswordform import ResetPasswordForm
+from flask_login import login_user
+from flask_bcrypt import generate_password_hash
+from app import db
+
+
+def ResetPassword(path):
+    linkvalid = False
+    user = User.query.filter_by(resethash=path).first()
+    if user is None:
+        return redirect(url_for("index"))
+    timepassed = datetime.now() - user.resettime
+    if timepassed.days < 1:
+        linkvalid = True
+
+    resetpasswordform = ResetPasswordForm()
+    if resetpasswordform.validate_on_submit():
+        return ResetUserPasswordInDB(user, resetpasswordform)
+    return render_template(
+        "resetpassword.html",
+        resetpasswordform=resetpasswordform,
+        path=path,
+        linkvalid=linkvalid,
+    )
+
+
+def ResetUserPasswordInDB(user, resetpasswordform):
+    try:
+        newpassword = resetpasswordform.confirmpassword.data
+        user.password = generate_password_hash(newpassword)
+        user.resethash = None
+        user.resettime = None
+        db.session.commit()
+        flash("Password Succesfully updated", "success")
+        login_user(user)
+        return redirect(url_for("index"))
+
+    except InvalidRequestError:
+        db.session.rollback()
+        resetpasswordform.email.errors.append("Something went wrong!")
+        flash("Something went wrong!", "danger")
+    except IntegrityError:
+        db.session.rollback()
+        resetpasswordform.email.errors.append("User already exists!")
+        flash("User already exists!", "warning")
+    except DataError:
+        db.session.rollback()
+        resetpasswordform.email.errors.append("Invalid Entry")
+        flash("Invalid Entry", "warning")
+    except InterfaceError:
+        db.session.rollback()
+        resetpasswordform.email.errors.append(
+            "Error connecting to the database"
+        )
+        flash("Error connecting to the database", "danger")
+    except DatabaseError:
+        db.session.rollback()
+        resetpasswordform.email.errors.append(
+            "Error connecting to the database"
+        )
+        flash("Error connecting to the database", "danger")
+    except BuildError:
+        db.session.rollback()
+        resetpasswordform.email.errors.append("Unknown error occured!")
+        flash("An error occured !", "danger")

library/forms/forgotpasswordform.py

@@ -0,0 +1,19 @@
+"""Forgotten password form to help user."""
+from wtforms import (
+    StringField,
+    SubmitField,
+)
+
+from wtforms import validators
+from wtforms.validators import Length, Email
+from flask_wtf import FlaskForm
+
+
+class ForgotPasswordForm(FlaskForm):
+    """Forgotten password csv-library form"""
+
+    email = StringField(
+        "Email address:",
+        validators=[validators.InputRequired(), Email(), Length(6, 64)],
+    )
+    submit = SubmitField("Send email")

library/forms/loginform.py

@@ -0,0 +1,23 @@
+"""Login form to validate user."""
+from wtforms import (
+    StringField,
+    SubmitField,
+    PasswordField,
+)
+
+from wtforms import validators
+from wtforms.validators import Length, Email
+from flask_wtf import FlaskForm
+
+
+class LoginForm(FlaskForm):
+    """Login csv-library form"""
+
+    email = StringField(
+        "Email address:",
+        validators=[validators.InputRequired(), Email(), Length(6, 64)],
+    )
+    password = PasswordField(
+        "Password:", validators=[validators.InputRequired()]
+    )
+    submit = SubmitField("Sign In")

library/forms/registerform.py

@@ -0,0 +1,43 @@
+"""Register form to make a new user."""
+from wtforms import (
+    StringField,
+    SubmitField,
+    PasswordField,
+)
+
+from wtforms import validators
+from wtforms.validators import Length, Email, EqualTo, ValidationError
+from flask_wtf import FlaskForm
+
+
+class RegisterForm(FlaskForm):
+    """Register for csv-library form"""
+
+    username = StringField(
+        "Username:",
+        validators=[validators.InputRequired(), Length(3, 150)],
+    )
+
+    email = StringField(
+        "Email address:",
+        validators=[
+            validators.InputRequired(),
+            Email(),
+            Length(6, 64),
+        ]
+    )
+
+    password = PasswordField(
+        "New password:",
+        validators=[validators.InputRequired(), Length(12, 72)],
+    )
+
+    confirmpassword = PasswordField(
+        "Confirm your password:",
+        validators=[
+            validators.InputRequired(),
+            Length(12, 72),
+            EqualTo("password", message="Passwords must match !"),
+        ],
+    )
+    submit = SubmitField("Register to the library")

library/forms/resetpasswordform.py

@@ -0,0 +1,27 @@
+"""Reset Password Form form to reset a users PasswordField."""
+from wtforms import (
+    SubmitField,
+    PasswordField,
+)
+
+from wtforms import validators
+from wtforms.validators import Length, EqualTo
+from flask_wtf import FlaskForm
+
+
+class ResetPasswordForm(FlaskForm):
+    """ResetPassword for csv-library form"""
+
+    password = PasswordField(
+        "New password:",
+        validators=[validators.InputRequired(), Length(12, 72)],
+    )
+    confirmpassword = PasswordField(
+        "Confirm your password:",
+        validators=[
+            validators.InputRequired(),
+            Length(12, 72),
+            EqualTo("password", message="Passwords must match !"),
+        ],
+    )
+    submit = SubmitField("Reset your password")

library/templates/user/forgotpassword.html

@@ -0,0 +1,29 @@
+{% extends "base.html" %}
+{% block main %}
+<div id="mainworkflow">
+  <div class="workflow">
+    <h2>Forgot your password?</h2>
+    <p>
+      Enter the email address that was used to register with the library.
+    </p>
+    <form class="form" action="{{ url_for('forgotpassword') }}" method="post">
+      {{ forgotpasswordform.csrf_token }}
+      <fieldset class="required">
+        {{ forgotpasswordform.email.label }}
+        {{ forgotpasswordform.email }}
+        {% for message in forgotpasswordform.email.errors %}
+          <div class="error">{{ message }}</div>
+        {% endfor %}
+      </fieldset>
+      <fieldset class="button required error">
+        {{ forgotpasswordform.submit }}
+        <div class="overview">
+          <a href="/">
+            <input type="button" name="button" value="Back to main page"></input>
+          </a>
+        </div>
+      </fieldset>
+    </form>
+  </div>
+</div
+{% endblock main %}

library/templates/user/login.html

@@ -0,0 +1,26 @@
+{% extends "base.html" %}
+{% block main %}
+<div id="login">
+  <form class="form" action="{{ url_for('login') }}" method="post">
+    {{ loginform.csrf_token }}
+    <fieldset class="required">
+      {{ loginform.email.label }}
+      {{ loginform.email }}
+      {% for message in loginform.email.errors %}
+        <div class="error">{{ message }}</div>
+      {% endfor %}
+    </fieldset>
+    <fieldset class="required">
+      {{ loginform.password.label }}
+      {{ loginform.password }}
+      {% for message in loginform.password.errors %}
+        <div class="error">{{ message }}</div>
+      {% endfor %}
+    </fieldset>
+    <fieldset class="button required">
+      {{ loginform.submit }}
+      <a href="/forgotpassword">Forgot Password?</a>
+    </fieldset>
+  </form>
+</div>
+{% endblock main %}

library/templates/user/register.html

@@ -0,0 +1,39 @@
+{% extends "base.html" %}
+{% block main %}
+<div id="login">
+  <form class="form" action="{{ url_for('register') }}" method="post">
+    {{ registerform.csrf_token }}
+    <fieldset class="required">
+      {{ registerform.username.label }}
+      {{ registerform.username }}
+      {% for message in registerform.username.errors %}
+      <div class="error">{{ message }}</div>
+      {% endfor %}
+    </fieldset>
+    <fieldset class="required">
+      {{ registerform.email.label }}
+      {{ registerform.email }}
+      {% for message in registerform.email.errors %}
+      <div class="error">{{ message }}</div>
+      {% endfor %}
+    </fieldset>
+    <fieldset class="required">
+      {{ registerform.password.label }}
+      {{ registerform.password }}
+      {% for message in registerform.password.errors %}
+      <div class="error">{{ message }}</div>
+      {% endfor %}
+    </fieldset>
+    <fieldset class="required">
+      {{ registerform.confirmpassword.label }}
+      {{ registerform.confirmpassword }}
+      {% for message in registerform.confirmpassword.errors %}
+      <div class="error">{{ message }}</div>
+      {% endfor %}
+    </fieldset>
+    <fieldset class="button required">
+      {{ registerform.submit }}
+    </fieldset>
+  </form>
+</div>
+{% endblock main %}

library/templates/user/resetpassword.html

@@ -0,0 +1,29 @@
+{% extends "base.html" %}
+{% block main %}
+<div id="login">
+  {% if linkvalid%}
+  <form class="form" action="{{ url_for('resetpassword', path=path) }}" method="post">
+    {{ resetpasswordform.csrf_token }}
+    <fieldset class="required">
+      {{ resetpasswordform.password.label }}
+      {{ resetpasswordform.password }}
+      {% for message in resetpasswordform.password.errors %}
+      <div class="error">{{ message }}</div>
+      {% endfor %}
+    </fieldset>
+    <fieldset class="required">
+      {{ resetpasswordform.confirmpassword.label }}
+      {{ resetpasswordform.confirmpassword }}
+      {% for message in resetpasswordform.confirmpassword.errors %}
+      <div class="error">{{ message }}</div>
+      {% endfor %}
+    </fieldset>
+    <fieldset class="button required">
+      {{ resetpasswordform.submit }}
+    </fieldset>
+  </form>
+  {% else %}
+    <h3>Password reset link no longer valid.</h3>
+  {% endif %}
+</div>
+{% endblock main %}