app-MAIL-temp/app/dashboard/views/custom_alias.py
2023-12-20 16:15:01 +01:00

174 lines
6.3 KiB
Python

from email_validator import validate_email, EmailNotValidError
from flask import render_template, redirect, url_for, flash, request
from flask_login import login_required, current_user
from sqlalchemy.exc import IntegrityError
from app import parallel_limiter
from app.alias_suffix import (
get_alias_suffixes,
check_suffix_signature,
verify_prefix_suffix,
)
from app.alias_utils import check_alias_prefix
from app.config import (
ALIAS_LIMIT,
)
from app.dashboard.base import dashboard_bp
from app.db import Session
from app.extensions import limiter
from app.log import LOG
from app.models import (
Alias,
DeletedAlias,
Mailbox,
AliasMailbox,
DomainDeletedAlias,
)
from app.utils import CSRFValidationForm
@dashboard_bp.route("/custom_alias", methods=["GET", "POST"])
@limiter.limit(ALIAS_LIMIT, methods=["POST"])
@login_required
@parallel_limiter.lock(name="alias_creation")
def custom_alias():
# check if user has not exceeded the alias quota
if not current_user.can_create_new_alias():
LOG.d("%s can't create new alias", current_user)
flash(
"You have reached free plan limit, please upgrade to create new aliases",
"warning",
)
return redirect(url_for("dashboard.index"))
user_custom_domains = [cd.domain for cd in current_user.verified_custom_domains()]
alias_suffixes = get_alias_suffixes(current_user)
at_least_a_premium_domain = False
for alias_suffix in alias_suffixes:
if not alias_suffix.is_custom and alias_suffix.is_premium:
at_least_a_premium_domain = True
break
csrf_form = CSRFValidationForm()
mailboxes = current_user.mailboxes()
if request.method == "POST":
if not csrf_form.validate():
flash("Invalid request", "warning")
return redirect(request.url)
alias_prefix = request.form.get("prefix").strip().lower().replace(" ", "")
signed_alias_suffix = request.form.get("signed-alias-suffix")
mailbox_ids = request.form.getlist("mailboxes")
alias_note = request.form.get("note")
if not check_alias_prefix(alias_prefix):
flash(
"Only lowercase letters, numbers, dashes (-), dots (.) and underscores (_) "
"are currently supported for alias prefix. Cannot be more than 40 letters",
"error",
)
return redirect(request.url)
# check if mailbox is not tempered with
mailboxes = []
for mailbox_id in mailbox_ids:
mailbox = Mailbox.get(mailbox_id)
if (
not mailbox
or mailbox.user_id != current_user.id
or not mailbox.verified
):
flash("Something went wrong, please retry", "warning")
return redirect(request.url)
mailboxes.append(mailbox)
if not mailboxes:
flash("At least one mailbox must be selected", "error")
return redirect(request.url)
try:
suffix = check_suffix_signature(signed_alias_suffix)
if not suffix:
LOG.w("Alias creation time expired for %s", current_user)
flash("Alias creation time is expired, please retry", "warning")
return redirect(request.url)
except Exception:
LOG.w("Alias suffix is tampered, user %s", current_user)
flash("Unknown error, refresh the page", "error")
return redirect(request.url)
if verify_prefix_suffix(current_user, alias_prefix, suffix):
full_alias = alias_prefix + suffix
if ".." in full_alias:
flash("Your alias can't contain 2 consecutive dots (..)", "error")
return redirect(request.url)
try:
validate_email(
full_alias, check_deliverability=False, allow_smtputf8=False
)
except EmailNotValidError as e:
flash(str(e), "error")
return redirect(request.url)
general_error_msg = f"{full_alias} cannot be used"
if Alias.get_by(email=full_alias):
alias = Alias.get_by(email=full_alias)
if alias.user_id == current_user.id:
flash(f"You already have this alias {full_alias}", "error")
else:
flash(general_error_msg, "error")
elif DomainDeletedAlias.get_by(email=full_alias):
domain_deleted_alias: DomainDeletedAlias = DomainDeletedAlias.get_by(
email=full_alias
)
custom_domain = domain_deleted_alias.domain
flash(
f"You have deleted this alias before. You can restore it on "
f"{custom_domain.domain} 'Deleted Alias' page",
"error",
)
elif DeletedAlias.get_by(email=full_alias):
flash(general_error_msg, "error")
else:
try:
alias = Alias.create(
user_id=current_user.id,
email=full_alias,
note=alias_note,
mailbox_id=mailboxes[0].id,
)
Session.flush()
except IntegrityError:
LOG.w("Alias %s already exists", full_alias)
Session.rollback()
flash("Unknown error, please retry", "error")
return redirect(url_for("dashboard.custom_alias"))
for i in range(1, len(mailboxes)):
AliasMailbox.create(
alias_id=alias.id,
mailbox_id=mailboxes[i].id,
)
Session.commit()
flash(f"Alias {full_alias} has been created", "success")
return redirect(url_for("dashboard.index", highlight_alias_id=alias.id))
# only happen if the request has been "hacked"
else:
flash("something went wrong", "warning")
return render_template(
"dashboard/custom_alias.html",
user_custom_domains=user_custom_domains,
alias_suffixes=alias_suffixes,
at_least_a_premium_domain=at_least_a_premium_domain,
mailboxes=mailboxes,
csrf_form=csrf_form,
)