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path: root/fietsboek/views/default.py
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"""Home views."""
from pyramid.view import view_config
from pyramid.httpexceptions import HTTPFound, HTTPNotFound
from pyramid.security import remember, forget
from pyramid.i18n import TranslationString as _
from pyramid.interfaces import ISecurityPolicy
from pyramid.renderers import render_to_response

from sqlalchemy import select
from sqlalchemy.orm import aliased
from sqlalchemy.exc import NoResultFound

from markupsafe import Markup

from .. import models, summaries, util, email
from ..models.user import PasswordMismatch, TokenType
from ..models.track import TrackType


@view_config(route_name="home", renderer="fietsboek:templates/home.jinja2")
def home(request):
    """Renders the home page.

    :param request: The Pyramid request.
    :type request: pyramid.request.Request
    :return: The HTTP response.
    :rtype: pyramid.response.Response
    """
    if not request.identity:
        # See if the admin set a custom home page
        page = request.pages.find("/", request)
        if page is not None:
            return render_to_response(
                "fietsboek:templates/static-page.jinja2",
                {
                    "title": page.title,
                    "content": Markup(page.content),
                },
                request,
            )

        # Show the default home page
        locale = request.localizer.locale_name
        content = util.read_localized_resource(
            locale,
            "html/home.html",
            locale_packages=request.config.language_packs,
        )
        return {
            "home_content": content,
        }

    query = request.identity.all_tracks_query()
    query = select(aliased(models.Track, query)).where(query.c.type == TrackType.ORGANIC)
    summary = summaries.Summary()

    for track in request.dbsession.execute(query).scalars():
        track.ensure_cache()
        request.dbsession.add(track.cache)
        summary.add(track)

    return {
        "summary": summary,
        "month_name": util.month_name,
    }


@view_config(route_name="static-page", renderer="fietsboek:templates/static-page.jinja2")
def static_page(request):
    """Renders a static page.

    :param request: The Pyramid request.
    :type request: pyramid.request.Request
    :return: The HTTP response.
    :rtype: pyramid.response.Response
    """
    page = request.pages.find(request.matchdict["slug"], request)
    if page is None:
        return HTTPNotFound()

    return {
        "title": page.title,
        "content": Markup(page.content),
    }


@view_config(route_name="login", renderer="fietsboek:templates/login.jinja2", request_method="GET")
def login(request):
    """Renders the login page.

    :param request: The Pyramid request.
    :type request: pyramid.request.Request
    :return: The HTTP response.
    :rtype: pyramid.response.Response
    """
    # pylint: disable=unused-argument
    return {}


@view_config(route_name="login", request_method="POST")
def do_login(request):
    """Endpoint for the login form.

    :param request: The Pyramid request.
    :type request: pyramid.request.Request
    :return: The HTTP response.
    :rtype: pyramid.response.Response
    """
    query = models.User.query_by_email(request.params["email"])
    try:
        user = request.dbsession.execute(query).scalar_one()
        user.check_password(request.params["password"])
    except (NoResultFound, PasswordMismatch):
        request.session.flash(request.localizer.translate(_("flash.invalid_credentials")))
        return HTTPFound(request.route_url("login"))

    if not user.is_verified:
        request.session.flash(request.localizer.translate(_("flash.account_not_verified")))
        return HTTPFound(request.route_url("login"))

    request.session.flash(request.localizer.translate(_("flash.logged_in")))
    headers = remember(request, str(user.id))

    if request.params.get("remember-me") == "on":
        # We don't want this logic to be the default in
        # SecurityPolicy.remember, so we manually fake it here:
        policy = request.registry.getUtility(ISecurityPolicy)
        headers += policy.remember_cookie(request, str(user.id))

    response = HTTPFound("/", headers=headers)
    return response


@view_config(route_name="logout")
def logout(request):
    """Logs the user out.

    :param request: The Pyramid request.
    :type request: pyramid.request.Request
    :return: The HTTP response.
    :rtype: pyramid.response.Response
    """
    request.session.flash(request.localizer.translate(_("flash.logged_out")))
    headers = forget(request)
    return HTTPFound("/", headers=headers)


@view_config(
    route_name="password-reset",
    request_method="GET",
    renderer="fietsboek:templates/request_password.jinja2",
)
def password_reset(request):
    """Form to request a new password.

    :param request: The Pyramid request.
    :type request: pyramid.request.Request
    :return: The HTTP response.
    :rtype: pyramid.response.Response
    """
    # pylint: disable=unused-argument
    return {}


@view_config(route_name="password-reset", request_method="POST")
def do_password_reset(request):
    """Endpoint for the password request form.

    :param request: The Pyramid request.
    :type request: pyramid.request.Request
    :return: The HTTP response.
    :rtype: pyramid.response.Response
    """
    query = models.User.query_by_email(request.params["email"])
    user = request.dbsession.execute(query).scalar_one_or_none()
    if user is None:
        request.session.flash(request.localizer.translate(_("flash.reset_invalid_email")))
        return HTTPFound(request.route_url("password-reset"))

    token = models.Token.generate(user, TokenType.RESET_PASSWORD)
    request.dbsession.add(token)
    request.session.flash(request.localizer.translate(_("flash.password_token_generated")))

    mail = email.prepare_message(
        request.config.email_from,
        user.email,
        request.localizer.translate(_("page.password_reset.email.subject")),
    )
    mail.set_content(
        request.localizer.translate(_("page.password_reset.email.body")).format(
            request.route_url("use-token", uuid=token.uuid)
        )
    )
    email.send_message(
        request.config.email_smtp_url,
        request.config.email_username,
        request.config.email_password.get_secret_value(),
        mail,
    )

    return HTTPFound(request.route_url("password-reset"))


@view_config(route_name="use-token")
def use_token(request):
    """Endpoint with which a user can use a token for a password reset or email
    verification.

    :param request: The Pyramid request.
    :type request: pyramid.request.Request
    :return: The HTTP response.
    :rtype: pyramid.response.Response
    """
    token = request.dbsession.execute(
        select(models.Token).filter_by(uuid=request.matchdict["uuid"])
    ).scalar_one_or_none()
    if token is None:
        return HTTPNotFound()

    if token.token_type == TokenType.VERIFY_EMAIL:
        token.user.is_verified = True
        request.dbsession.delete(token)
        request.session.flash(request.localizer.translate(_("flash.email_verified")))
        return HTTPFound(request.route_url("login"))
    if request.method == "GET" and token.token_type == TokenType.RESET_PASSWORD:
        return render_to_response("fietsboek:templates/password_reset.jinja2", {}, request)
    if request.method == "POST" and token.token_type == TokenType.RESET_PASSWORD:
        password = request.params["password"]
        try:
            util.check_password_constraints(password, request.params["repeat-password"])
        except ValueError as exc:
            request.session.flash(request.localizer.translate(exc.args[0]))
            return HTTPFound(request.route_url("use-token", uuid=token.uuid))

        token.user.set_password(password)
        request.dbsession.delete(token)
        request.session.flash(request.localizer.translate(_("flash.password_updated")))
        return HTTPFound(request.route_url("login"))
    return None