fix: monitoring table name (#2120)

* fix: commit transaction after taking event

* feat: allow to reconnect to postgres for event listener

* chore: log sync events pending to process to metrics

* fix: make dead_letter runner able to process events without needing to have lock on the event

* chore: close Session after reconnect

* refactor: make EventSource emit only events that can be processed

CONTRIBUTING.md

@@ -68,6 +68,12 @@ For most tests, you will need to have ``redis`` installed and started on your ma
 sh scripts/run-test.sh
 ```
 
+You can also run tests using a local Postgres DB to speed things up. This can be done by
+
+- creating an empty test DB and running the database migration by `dropdb test && createdb test && DB_URI=postgresql://localhost:5432/test alembic upgrade head`
+
+- replacing the `DB_URI` in `test.env` file by `DB_URI=postgresql://localhost:5432/test`
+
 ## Run the code locally
 
 Install npm packages

app/admin_model.py

@@ -46,7 +46,8 @@ class SLModelView(sqla.ModelView):
 
     def inaccessible_callback(self, name, **kwargs):
         # redirect to login page if user doesn't have access
-        return redirect(url_for("auth.login", next=request.url))
+        flash("You don't have access to the admin page", "error")
+        return redirect(url_for("dashboard.index", next=request.url))
 
     def on_model_change(self, form, model, is_created):
         changes = {}

app/alias_utils.py

@@ -25,6 +25,8 @@ from app.email_utils import (
     render,
 )
 from app.errors import AliasInTrashError
+from app.events.event_dispatcher import EventDispatcher
+from app.events.generated.event_pb2 import AliasDeleted, AliasStatusChange, EventContent
 from app.log import LOG
 from app.models import (
     Alias,
@@ -308,31 +310,36 @@ def delete_alias(alias: Alias, user: User):
     Delete an alias and add it to either global or domain trash
     Should be used instead of Alias.delete, DomainDeletedAlias.create, DeletedAlias.create
     """
-    # save deleted alias to either global or domain trash
+    LOG.i(f"User {user} has deleted alias {alias}")
+    # save deleted alias to either global or domain tra
     if alias.custom_domain_id:
         if not DomainDeletedAlias.get_by(
             email=alias.email, domain_id=alias.custom_domain_id
         ):
-            LOG.d("add %s to domain %s trash", alias, alias.custom_domain_id)
-            Session.add(
-                DomainDeletedAlias(
+            domain_deleted_alias = DomainDeletedAlias(
                 user_id=user.id,
                 email=alias.email,
                 domain_id=alias.custom_domain_id,
             )
-            )
+            Session.add(domain_deleted_alias)
             Session.commit()
-
+            LOG.i(
+                f"Moving {alias} to domain {alias.custom_domain_id} trash {domain_deleted_alias}"
+            )
     else:
         if not DeletedAlias.get_by(email=alias.email):
-            LOG.d("add %s to global trash", alias)
-            Session.add(DeletedAlias(email=alias.email))
+            deleted_alias = DeletedAlias(email=alias.email)
+            Session.add(deleted_alias)
             Session.commit()
+            LOG.i(f"Moving {alias} to global trash {deleted_alias}")
 
-    LOG.i("delete alias %s", alias)
     Alias.filter(Alias.id == alias.id).delete()
     Session.commit()
 
+    EventDispatcher.send_event(
+        user, EventContent(alias_deleted=AliasDeleted(alias_id=alias.id))
+    )
+
 
 def aliases_for_mailbox(mailbox: Mailbox) -> [Alias]:
     """
@@ -458,3 +465,15 @@ def transfer_alias(alias, new_user, new_mailboxes: [Mailbox]):
     alias.pinned = False
 
     Session.commit()
+
+
+def change_alias_status(alias: Alias, enabled: bool, commit: bool = False):
+    alias.enabled = enabled
+
+    event = AliasStatusChange(
+        alias_id=alias.id, alias_email=alias.email, enabled=enabled
+    )
+    EventDispatcher.send_event(alias.user, EventContent(alias_status_change=event))
+
+    if commit:
+        Session.commit()

app/api/views/alias.py

@@ -184,7 +184,7 @@ def toggle_alias(alias_id):
     if not alias or alias.user_id != user.id:
         return jsonify(error="Forbidden"), 403
 
-    alias.enabled = not alias.enabled
+    alias_utils.change_alias_status(alias, enabled=not alias.enabled)
     Session.commit()
 
     return jsonify(enabled=alias.enabled), 200

app/auth/views/change_email.py

@@ -3,11 +3,13 @@ from flask_login import login_user
 
 from app.auth.base import auth_bp
 from app.db import Session
+from app.extensions import limiter
 from app.log import LOG
 from app.models import EmailChange, ResetPasswordCode
 
 
 @auth_bp.route("/change_email", methods=["GET", "POST"])
+@limiter.limit("3/hour")
 def change_email():
     code = request.args.get("code")
 

app/auth/views/oidc.py

@@ -1,14 +1,13 @@
 from flask import request, session, redirect, flash, url_for
 from requests_oauthlib import OAuth2Session
 
+import requests
+
 from app import config
 from app.auth.base import auth_bp
 from app.auth.views.login_utils import after_login
 from app.config import (
     URL,
-    OIDC_AUTHORIZATION_URL,
-    OIDC_USER_INFO_URL,
-    OIDC_TOKEN_URL,
     OIDC_SCOPES,
     OIDC_NAME_FIELD,
 )
@@ -16,14 +15,15 @@ from app.db import Session
 from app.email_utils import send_welcome_email
 from app.log import LOG
 from app.models import User, SocialAuth
-from app.utils import encode_url, sanitize_email, sanitize_next_url
+from app.utils import sanitize_email, sanitize_next_url
 
 
 # need to set explicitly redirect_uri instead of leaving the lib to pre-fill redirect_uri
 # when served behind nginx, the redirect_uri is localhost... and not the real url
-_redirect_uri = URL + "/auth/oidc/callback"
+redirect_uri = URL + "/auth/oidc/callback"
 
 SESSION_STATE_KEY = "oauth_state"
+SESSION_NEXT_KEY = "oauth_redirect_next"
 
 
 @auth_bp.route("/oidc/login")
@@ -32,18 +32,17 @@ def oidc_login():
         return redirect(url_for("auth.login"))
 
     next_url = sanitize_next_url(request.args.get("next"))
-    if next_url:
-        redirect_uri = _redirect_uri + "?next=" + encode_url(next_url)
-    else:
-        redirect_uri = _redirect_uri
+
+    auth_url = requests.get(config.OIDC_WELL_KNOWN_URL).json()["authorization_endpoint"]
 
     oidc = OAuth2Session(
         config.OIDC_CLIENT_ID, scope=[OIDC_SCOPES], redirect_uri=redirect_uri
     )
-    authorization_url, state = oidc.authorization_url(OIDC_AUTHORIZATION_URL)
+    authorization_url, state = oidc.authorization_url(auth_url)
 
     # State is used to prevent CSRF, keep this for later.
     session[SESSION_STATE_KEY] = state
+    session[SESSION_NEXT_KEY] = next_url
     return redirect(authorization_url)
 
 
@@ -60,19 +59,23 @@ def oidc_callback():
         flash("Please use another sign in method then", "warning")
         return redirect("/")
 
+    oidc_configuration = requests.get(config.OIDC_WELL_KNOWN_URL).json()
+    user_info_url = oidc_configuration["userinfo_endpoint"]
+    token_url = oidc_configuration["token_endpoint"]
+
     oidc = OAuth2Session(
         config.OIDC_CLIENT_ID,
         state=session[SESSION_STATE_KEY],
         scope=[OIDC_SCOPES],
-        redirect_uri=_redirect_uri,
+        redirect_uri=redirect_uri,
     )
     oidc.fetch_token(
-        OIDC_TOKEN_URL,
+        token_url,
         client_secret=config.OIDC_CLIENT_SECRET,
         authorization_response=request.url,
     )
 
-    oidc_user_data = oidc.get(OIDC_USER_INFO_URL)
+    oidc_user_data = oidc.get(user_info_url)
     if oidc_user_data.status_code != 200:
         LOG.e(
             f"cannot get oidc user data {oidc_user_data.status_code} {oidc_user_data.text}"
@@ -111,7 +114,8 @@ def oidc_callback():
         Session.commit()
 
     # The activation link contains the original page, for ex authorize page
-    next_url = sanitize_next_url(request.args.get("next")) if request.args else None
+    next_url = session[SESSION_NEXT_KEY]
+    session[SESSION_NEXT_KEY] = None
 
     return after_login(user, next_url)
 

app/config.py

@@ -245,9 +245,7 @@ FACEBOOK_CLIENT_ID = os.environ.get("FACEBOOK_CLIENT_ID")
 FACEBOOK_CLIENT_SECRET = os.environ.get("FACEBOOK_CLIENT_SECRET")
 
 CONNECT_WITH_OIDC_ICON = os.environ.get("CONNECT_WITH_OIDC_ICON")
-OIDC_AUTHORIZATION_URL = os.environ.get("OIDC_AUTHORIZATION_URL")
-OIDC_USER_INFO_URL = os.environ.get("OIDC_USER_INFO_URL")
-OIDC_TOKEN_URL = os.environ.get("OIDC_TOKEN_URL")
+OIDC_WELL_KNOWN_URL = os.environ.get("OIDC_WELL_KNOWN_URL")
 OIDC_CLIENT_ID = os.environ.get("OIDC_CLIENT_ID")
 OIDC_CLIENT_SECRET = os.environ.get("OIDC_CLIENT_SECRET")
 OIDC_SCOPES = os.environ.get("OIDC_SCOPES")
@@ -431,9 +429,11 @@ except Exception:
     HIBP_SCAN_INTERVAL_DAYS = 7
 HIBP_API_KEYS = sl_getenv("HIBP_API_KEYS", list) or []
 HIBP_MAX_ALIAS_CHECK = 10_000
-HIBP_RPM = 100
+HIBP_RPM = int(os.environ.get("HIBP_API_RPM", 100))
 HIBP_SKIP_PARTNER_ALIAS = os.environ.get("HIBP_SKIP_PARTNER_ALIAS")
 
+KEEP_OLD_DATA_DAYS = 30
+
 POSTMASTER = os.environ.get("POSTMASTER")
 
 # store temporary files, especially for debugging
@@ -581,3 +581,9 @@ UPCLOUD_PASSWORD = os.environ.get("UPCLOUD_PASSWORD", None)
 UPCLOUD_DB_ID = os.environ.get("UPCLOUD_DB_ID", None)
 
 STORE_TRANSACTIONAL_EMAILS = "STORE_TRANSACTIONAL_EMAILS" in os.environ
+
+EVENT_WEBHOOK = os.environ.get("EVENT_WEBHOOK", None)
+
+# We want it disabled by default, so only skip if defined
+EVENT_WEBHOOK_SKIP_VERIFY_SSL = "EVENT_WEBHOOK_SKIP_VERIFY_SSL" in os.environ
+EVENT_WEBHOOK_DISABLE = "EVENT_WEBHOOK_DISABLE" in os.environ

app/dashboard/views/enter_sudo.py

@@ -14,7 +14,7 @@ from app.models import PartnerUser, SocialAuth
 from app.proton.utils import get_proton_partner
 from app.utils import sanitize_next_url
 
-_SUDO_GAP = 900
+_SUDO_GAP = 120
 
 
 class LoginForm(FlaskForm):

app/dashboard/views/index.py

@@ -141,12 +141,12 @@ def index():
                 )
 
             if request.form.get("form-name") == "delete-alias":
-                LOG.d("delete alias %s", alias)
+                LOG.i(f"User {current_user} requested deletion of alias {alias}")
                 email = alias.email
                 alias_utils.delete_alias(alias, current_user)
                 flash(f"Alias {email} has been deleted", "success")
             elif request.form.get("form-name") == "disable-alias":
-                alias.enabled = False
+                alias_utils.change_alias_status(alias, enabled=False)
                 Session.commit()
                 flash(f"Alias {alias.email} has been disabled", "success")
 

app/dashboard/views/mailbox_detail.py

@@ -11,9 +11,11 @@ from wtforms.fields.html5 import EmailField
 from app.config import ENFORCE_SPF, MAILBOX_SECRET
 from app.config import URL
 from app.dashboard.base import dashboard_bp
+from app.dashboard.views.enter_sudo import sudo_required
 from app.db import Session
 from app.email_utils import email_can_be_used_as_mailbox
 from app.email_utils import mailbox_already_used, render, send_email
+from app.extensions import limiter
 from app.log import LOG
 from app.models import Alias, AuthorizedAddress
 from app.models import Mailbox
@@ -29,6 +31,8 @@ class ChangeEmailForm(FlaskForm):
 
 @dashboard_bp.route("/mailbox/<int:mailbox_id>/", methods=["GET", "POST"])
 @login_required
+@sudo_required
+@limiter.limit("20/minute", methods=["POST"])
 def mailbox_detail_route(mailbox_id):
     mailbox: Mailbox = Mailbox.get(mailbox_id)
     if not mailbox or mailbox.user_id != current_user.id:
@@ -179,8 +183,15 @@ def mailbox_detail_route(mailbox_id):
 
         elif request.form.get("form-name") == "toggle-pgp":
             if request.form.get("pgp-enabled") == "on":
+                if mailbox.is_proton():
+                    mailbox.disable_pgp = True
+                    flash(
+                        "Enabling PGP for a Proton Mail mailbox is redundant and does not add any security benefit",
+                        "info",
+                    )
+                else:
                     mailbox.disable_pgp = False
-                flash(f"PGP is enabled on {mailbox.email}", "success")
+                    flash(f"PGP is enabled on {mailbox.email}", "info")
             else:
                 mailbox.disable_pgp = True
                 flash(f"PGP is disabled on {mailbox.email}", "info")

app/dashboard/views/setting.py

@@ -227,6 +227,21 @@ def setting():
             Session.commit()
             flash("Your preference has been updated", "success")
             return redirect(url_for("dashboard.setting"))
+        elif request.form.get("form-name") == "enable_data_breach_check":
+            if not current_user.is_premium():
+                flash("Only premium plan can enable data breach monitoring", "warning")
+                return redirect(url_for("dashboard.setting"))
+            choose = request.form.get("enable_data_breach_check")
+            if choose == "on":
+                LOG.i("User {current_user} has enabled data breach monitoring")
+                current_user.enable_data_breach_check = True
+                flash("Data breach monitoring is enabled", "success")
+            else:
+                LOG.i("User {current_user} has disabled data breach monitoring")
+                current_user.enable_data_breach_check = False
+                flash("Data breach monitoring is disabled", "info")
+            Session.commit()
+            return redirect(url_for("dashboard.setting"))
         elif request.form.get("form-name") == "sender-in-ra":
             choose = request.form.get("enable")
             if choose == "on":

app/dashboard/views/unsubscribe.py

@@ -8,6 +8,7 @@ from app.db import Session
 from flask import redirect, url_for, flash, request, render_template
 from flask_login import login_required, current_user
 
+from app import alias_utils
 from app.dashboard.base import dashboard_bp
 from app.handler.unsubscribe_encoder import UnsubscribeAction
 from app.handler.unsubscribe_handler import UnsubscribeHandler
@@ -31,7 +32,7 @@ def unsubscribe(alias_id):
 
     # automatic unsubscribe, according to https://tools.ietf.org/html/rfc8058
     if request.method == "POST":
-        alias.enabled = False
+        alias_utils.change_alias_status(alias, False)
         flash(f"Alias {alias.email} has been blocked", "success")
         Session.commit()
 

app/email/headers.py

@@ -21,6 +21,7 @@ LIST_UNSUBSCRIBE = "List-Unsubscribe"
 LIST_UNSUBSCRIBE_POST = "List-Unsubscribe-Post"
 RETURN_PATH = "Return-Path"
 AUTHENTICATION_RESULTS = "Authentication-Results"
+SL_QUEUE_ID = "X-SL-Queue-Id"
 
 # headers used to DKIM sign in order of preference
 DKIM_HEADERS = [

app/email_utils.py

@@ -494,9 +494,10 @@ def delete_header(msg: Message, header: str):
 
 def sanitize_header(msg: Message, header: str):
     """remove trailing space and remove linebreak from a header"""
+    header_lowercase = header.lower()
     for i in reversed(range(len(msg._headers))):
         header_name = msg._headers[i][0].lower()
-        if header_name == header.lower():
+        if header_name == header_lowercase:
             # msg._headers[i] is a tuple like ('From', 'hey@google.com')
             if msg._headers[i][1]:
                 msg._headers[i] = (

app/events/event_dispatcher.py

@@ -0,0 +1,66 @@
+from abc import ABC, abstractmethod
+from app import config
+from app.db import Session
+from app.errors import ProtonPartnerNotSetUp
+from app.events.generated import event_pb2
+from app.models import User, PartnerUser, SyncEvent
+from app.proton.utils import get_proton_partner
+from typing import Optional
+
+NOTIFICATION_CHANNEL = "simplelogin_sync_events"
+
+
+class Dispatcher(ABC):
+    @abstractmethod
+    def send(self, event: bytes):
+        pass
+
+
+class PostgresDispatcher(Dispatcher):
+    def send(self, event: bytes):
+        instance = SyncEvent.create(content=event, flush=True)
+        Session.execute(f"NOTIFY {NOTIFICATION_CHANNEL}, '{instance.id}';")
+
+    @staticmethod
+    def get():
+        return PostgresDispatcher()
+
+
+class EventDispatcher:
+    @staticmethod
+    def send_event(
+        user: User,
+        content: event_pb2.EventContent,
+        dispatcher: Dispatcher = PostgresDispatcher.get(),
+        skip_if_webhook_missing: bool = True,
+    ):
+        if config.EVENT_WEBHOOK_DISABLE:
+            return
+
+        if not config.EVENT_WEBHOOK and skip_if_webhook_missing:
+            return
+
+        partner_user = EventDispatcher.__partner_user(user.id)
+        if not partner_user:
+            return
+
+        event = event_pb2.Event(
+            user_id=user.id,
+            external_user_id=partner_user.external_user_id,
+            partner_id=partner_user.partner_id,
+            content=content,
+        )
+
+        serialized = event.SerializeToString()
+        dispatcher.send(serialized)
+
+    @staticmethod
+    def __partner_user(user_id: int) -> Optional[PartnerUser]:
+        # Check if the current user has a partner_id
+        try:
+            proton_partner_id = get_proton_partner().id
+        except ProtonPartnerNotSetUp:
+            return None
+
+        # It has. Retrieve the information for the PartnerUser
+        return PartnerUser.get_by(user_id=user_id, partner_id=proton_partner_id)

app/events/generated/event_pb2.py

@@ -0,0 +1,38 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: event.proto
+# Protobuf Python Version: 5.26.1
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import descriptor_pool as _descriptor_pool
+from google.protobuf import symbol_database as _symbol_database
+from google.protobuf.internal import builder as _builder
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor_pool.Default().AddSerializedFile(b'\n\x0b\x65vent.proto\x12\x12simplelogin_events\"\'\n\x0eUserPlanChange\x12\x15\n\rplan_end_time\x18\x01 \x01(\r\"\r\n\x0bUserDeleted\"Z\n\x0c\x41liasCreated\x12\x10\n\x08\x61lias_id\x18\x01 \x01(\r\x12\x13\n\x0b\x61lias_email\x18\x02 \x01(\t\x12\x12\n\nalias_note\x18\x03 \x01(\t\x12\x0f\n\x07\x65nabled\x18\x04 \x01(\x08\"K\n\x11\x41liasStatusChange\x12\x10\n\x08\x61lias_id\x18\x01 \x01(\r\x12\x13\n\x0b\x61lias_email\x18\x02 \x01(\t\x12\x0f\n\x07\x65nabled\x18\x03 \x01(\x08\"5\n\x0c\x41liasDeleted\x12\x10\n\x08\x61lias_id\x18\x01 \x01(\r\x12\x13\n\x0b\x61lias_email\x18\x02 \x01(\t\"\xce\x02\n\x0c\x45ventContent\x12>\n\x10user_plan_change\x18\x01 \x01(\x0b\x32\".simplelogin_events.UserPlanChangeH\x00\x12\x37\n\x0cuser_deleted\x18\x02 \x01(\x0b\x32\x1f.simplelogin_events.UserDeletedH\x00\x12\x39\n\ralias_created\x18\x03 \x01(\x0b\x32 .simplelogin_events.AliasCreatedH\x00\x12\x44\n\x13\x61lias_status_change\x18\x04 \x01(\x0b\x32%.simplelogin_events.AliasStatusChangeH\x00\x12\x39\n\ralias_deleted\x18\x05 \x01(\x0b\x32 .simplelogin_events.AliasDeletedH\x00\x42\t\n\x07\x63ontent\"y\n\x05\x45vent\x12\x0f\n\x07user_id\x18\x01 \x01(\r\x12\x18\n\x10\x65xternal_user_id\x18\x02 \x01(\t\x12\x12\n\npartner_id\x18\x03 \x01(\r\x12\x31\n\x07\x63ontent\x18\x04 \x01(\x0b\x32 .simplelogin_events.EventContentb\x06proto3')
+
+_globals = globals()
+_builder.BuildMessageAndEnumDescriptors(DESCRIPTOR, _globals)
+_builder.BuildTopDescriptorsAndMessages(DESCRIPTOR, 'event_pb2', _globals)
+if not _descriptor._USE_C_DESCRIPTORS:
+  DESCRIPTOR._loaded_options = None
+  _globals['_USERPLANCHANGE']._serialized_start=35
+  _globals['_USERPLANCHANGE']._serialized_end=74
+  _globals['_USERDELETED']._serialized_start=76
+  _globals['_USERDELETED']._serialized_end=89
+  _globals['_ALIASCREATED']._serialized_start=91
+  _globals['_ALIASCREATED']._serialized_end=181
+  _globals['_ALIASSTATUSCHANGE']._serialized_start=183
+  _globals['_ALIASSTATUSCHANGE']._serialized_end=258
+  _globals['_ALIASDELETED']._serialized_start=260
+  _globals['_ALIASDELETED']._serialized_end=313
+  _globals['_EVENTCONTENT']._serialized_start=316
+  _globals['_EVENTCONTENT']._serialized_end=650
+  _globals['_EVENT']._serialized_start=652
+  _globals['_EVENT']._serialized_end=773
+# @@protoc_insertion_point(module_scope)

app/events/generated/event_pb2.pyi

@@ -0,0 +1,71 @@
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from typing import ClassVar as _ClassVar, Mapping as _Mapping, Optional as _Optional, Union as _Union
+
+DESCRIPTOR: _descriptor.FileDescriptor
+
+class UserPlanChange(_message.Message):
+    __slots__ = ("plan_end_time",)
+    PLAN_END_TIME_FIELD_NUMBER: _ClassVar[int]
+    plan_end_time: int
+    def __init__(self, plan_end_time: _Optional[int] = ...) -> None: ...
+
+class UserDeleted(_message.Message):
+    __slots__ = ()
+    def __init__(self) -> None: ...
+
+class AliasCreated(_message.Message):
+    __slots__ = ("alias_id", "alias_email", "alias_note", "enabled")
+    ALIAS_ID_FIELD_NUMBER: _ClassVar[int]
+    ALIAS_EMAIL_FIELD_NUMBER: _ClassVar[int]
+    ALIAS_NOTE_FIELD_NUMBER: _ClassVar[int]
+    ENABLED_FIELD_NUMBER: _ClassVar[int]
+    alias_id: int
+    alias_email: str
+    alias_note: str
+    enabled: bool
+    def __init__(self, alias_id: _Optional[int] = ..., alias_email: _Optional[str] = ..., alias_note: _Optional[str] = ..., enabled: bool = ...) -> None: ...
+
+class AliasStatusChange(_message.Message):
+    __slots__ = ("alias_id", "alias_email", "enabled")
+    ALIAS_ID_FIELD_NUMBER: _ClassVar[int]
+    ALIAS_EMAIL_FIELD_NUMBER: _ClassVar[int]
+    ENABLED_FIELD_NUMBER: _ClassVar[int]
+    alias_id: int
+    alias_email: str
+    enabled: bool
+    def __init__(self, alias_id: _Optional[int] = ..., alias_email: _Optional[str] = ..., enabled: bool = ...) -> None: ...
+
+class AliasDeleted(_message.Message):
+    __slots__ = ("alias_id", "alias_email")
+    ALIAS_ID_FIELD_NUMBER: _ClassVar[int]
+    ALIAS_EMAIL_FIELD_NUMBER: _ClassVar[int]
+    alias_id: int
+    alias_email: str
+    def __init__(self, alias_id: _Optional[int] = ..., alias_email: _Optional[str] = ...) -> None: ...
+
+class EventContent(_message.Message):
+    __slots__ = ("user_plan_change", "user_deleted", "alias_created", "alias_status_change", "alias_deleted")
+    USER_PLAN_CHANGE_FIELD_NUMBER: _ClassVar[int]
+    USER_DELETED_FIELD_NUMBER: _ClassVar[int]
+    ALIAS_CREATED_FIELD_NUMBER: _ClassVar[int]
+    ALIAS_STATUS_CHANGE_FIELD_NUMBER: _ClassVar[int]
+    ALIAS_DELETED_FIELD_NUMBER: _ClassVar[int]
+    user_plan_change: UserPlanChange
+    user_deleted: UserDeleted
+    alias_created: AliasCreated
+    alias_status_change: AliasStatusChange
+    alias_deleted: AliasDeleted
+    def __init__(self, user_plan_change: _Optional[_Union[UserPlanChange, _Mapping]] = ..., user_deleted: _Optional[_Union[UserDeleted, _Mapping]] = ..., alias_created: _Optional[_Union[AliasCreated, _Mapping]] = ..., alias_status_change: _Optional[_Union[AliasStatusChange, _Mapping]] = ..., alias_deleted: _Optional[_Union[AliasDeleted, _Mapping]] = ...) -> None: ...
+
+class Event(_message.Message):
+    __slots__ = ("user_id", "external_user_id", "partner_id", "content")
+    USER_ID_FIELD_NUMBER: _ClassVar[int]
+    EXTERNAL_USER_ID_FIELD_NUMBER: _ClassVar[int]
+    PARTNER_ID_FIELD_NUMBER: _ClassVar[int]
+    CONTENT_FIELD_NUMBER: _ClassVar[int]
+    user_id: int
+    external_user_id: str
+    partner_id: int
+    content: EventContent
+    def __init__(self, user_id: _Optional[int] = ..., external_user_id: _Optional[str] = ..., partner_id: _Optional[int] = ..., content: _Optional[_Union[EventContent, _Mapping]] = ...) -> None: ...

app/handler/dmarc.py

@@ -30,7 +30,9 @@ def apply_dmarc_policy_for_forward_phase(
 ) -> Tuple[Message, Optional[str]]:
     spam_result = SpamdResult.extract_from_headers(msg, Phase.forward)
     if not DMARC_CHECK_ENABLED or not spam_result:
+        LOG.i("DMARC check disabled")
         return msg, None
+    LOG.i(f"Spam check result in {spam_result}")
 
     from_header = get_header_unicode(msg[headers.FROM])
 
@@ -150,8 +152,10 @@ def apply_dmarc_policy_for_reply_phase(
 ) -> Optional[str]:
     spam_result = SpamdResult.extract_from_headers(msg, Phase.reply)
     if not DMARC_CHECK_ENABLED or not spam_result:
+        LOG.i("DMARC check disabled")
         return None
 
+    LOG.i(f"Spam check result is {spam_result}")
     if spam_result.dmarc not in (
         DmarcCheckResult.quarantine,
         DmarcCheckResult.reject,

app/handler/unsubscribe_handler.py

@@ -5,6 +5,7 @@ from typing import Optional
 from aiosmtpd.smtp import Envelope
 
 from app import config
+from app import alias_utils
 from app.db import Session
 from app.email import headers, status
 from app.email_utils import (
@@ -101,7 +102,7 @@ class UnsubscribeHandler:
             mailbox.email, alias
         ):
             return status.E509
-        alias.enabled = False
+        alias_utils.change_alias_status(alias, enabled=False)
         Session.commit()
         enable_alias_url = config.URL + f"/dashboard/?highlight_alias_id={alias.id}"
         for mailbox in alias.mailboxes:

app/import_utils.py

@@ -30,7 +30,10 @@ def handle_batch_import(batch_import: BatchImport):
 
     LOG.d("Download file %s from %s", batch_import.file, file_url)
     r = requests.get(file_url)
-    lines = [line.decode("utf-8") for line in r.iter_lines()]
+    # Replace invisible character
+    lines = [
+        line.decode("utf-8").replace("\ufeff", "").strip() for line in r.iter_lines()
+    ]
 
     import_from_csv(batch_import, user, lines)
 

app/models.py

@@ -525,6 +525,11 @@ class User(Base, ModelMixin, UserMixin, PasswordOracle):
         sa.Boolean, default=True, nullable=False, server_default="1"
     )
 
+    # user opted in for data breach check
+    enable_data_breach_check = sa.Column(
+        sa.Boolean, default=False, nullable=False, server_default="0"
+    )
+
     # bitwise flags. Allow for future expansion
     flags = sa.Column(
         sa.BigInteger,
@@ -652,6 +657,21 @@ class User(Base, ModelMixin, UserMixin, PasswordOracle):
 
         return user
 
+    @classmethod
+    def delete(cls, obj_id, commit=False):
+        # Internal import to avoid global import cycles
+        from app.events.event_dispatcher import EventDispatcher
+        from app.events.generated.event_pb2 import UserDeleted, EventContent
+
+        user: User = cls.get(obj_id)
+        EventDispatcher.send_event(user, EventContent(user_deleted=UserDeleted()))
+
+        res = super(User, cls).delete(obj_id)
+        if commit:
+            Session.commit()
+
+        return res
+
     def get_active_subscription(
         self, include_partner_subscription: bool = True
     ) -> Optional[
@@ -1614,6 +1634,18 @@ class Alias(Base, ModelMixin):
         Session.add(new_alias)
         DailyMetric.get_or_create_today_metric().nb_alias += 1
 
+        # Internal import to avoid global import cycles
+        from app.events.event_dispatcher import EventDispatcher
+        from app.events.generated.event_pb2 import AliasCreated, EventContent
+
+        event = AliasCreated(
+            alias_id=new_alias.id,
+            alias_email=new_alias.email,
+            alias_note=new_alias.note,
+            enabled=True,
+        )
+        EventDispatcher.send_event(user, EventContent(alias_created=event))
+
         if commit:
             Session.commit()
 
@@ -2644,10 +2676,15 @@ class Mailbox(Base, ModelMixin):
         return False
 
     def nb_alias(self):
-        return (
-            AliasMailbox.filter_by(mailbox_id=self.id).count()
-            + Alias.filter_by(mailbox_id=self.id).count()
+        alias_ids = set(
+            am.alias_id
+            for am in AliasMailbox.filter_by(mailbox_id=self.id).values(
+                AliasMailbox.alias_id
             )
+        )
+        for alias in Alias.filter_by(mailbox_id=self.id).values(Alias.id):
+            alias_ids.add(alias.id)
+        return len(alias_ids)
 
     def is_proton(self) -> bool:
         if (
@@ -2696,12 +2733,15 @@ class Mailbox(Base, ModelMixin):
 
     @property
     def aliases(self) -> [Alias]:
-        ret = Alias.filter_by(mailbox_id=self.id).all()
+        ret = dict(
+            (alias.id, alias) for alias in Alias.filter_by(mailbox_id=self.id).all()
+        )
 
         for am in AliasMailbox.filter_by(mailbox_id=self.id):
-            ret.append(am.alias)
+            if am.alias_id not in ret:
+                ret[am.alias_id] = am.alias
 
-        return ret
+        return list(ret.values())
 
     @classmethod
     def create(cls, **kw):
@@ -3635,3 +3675,52 @@ class ApiToCookieToken(Base, ModelMixin):
         code = secrets.token_urlsafe(32)
 
         return super().create(code=code, **kwargs)
+
+
+class SyncEvent(Base, ModelMixin):
+    """This model holds the events that need to be sent to the webhook"""
+
+    __tablename__ = "sync_event"
+    content = sa.Column(sa.LargeBinary, unique=False, nullable=False)
+    taken_time = sa.Column(
+        ArrowType, default=None, nullable=True, server_default=None, index=True
+    )
+
+    __table_args__ = (
+        sa.Index("ix_sync_event_created_at", "created_at"),
+        sa.Index("ix_sync_event_taken_time", "taken_time"),
+    )
+
+    def mark_as_taken(self) -> bool:
+        sql = """
+        UPDATE sync_event
+        SET taken_time = :taken_time
+        WHERE id = :sync_event_id
+          AND taken_time IS NULL
+        """
+        args = {"taken_time": arrow.now().datetime, "sync_event_id": self.id}
+
+        res = Session.execute(sql, args)
+        Session.commit()
+
+        return res.rowcount > 0
+
+    @classmethod
+    def get_dead_letter(cls, older_than: Arrow) -> [SyncEvent]:
+        return (
+            SyncEvent.filter(
+                (
+                    (
+                        SyncEvent.taken_time.isnot(None)
+                        & (SyncEvent.taken_time < older_than)
+                    )
+                    | (
+                        SyncEvent.taken_time.is_(None)
+                        & (SyncEvent.created_at < older_than)
+                    )
+                )
+            )
+            .order_by(SyncEvent.id)
+            .limit(100)
+            .all()
+        )

app/rate_limiter.py

@@ -30,7 +30,9 @@ def check_bucket_limit(
     try:
         value = lock_redis.incr(bucket_lock_name, bucket_seconds)
         if value > max_hits:
-            LOG.i(f"Rate limit hit for {bucket_lock_name} -> {value}/{max_hits}")
+            LOG.i(
+                f"Rate limit hit for {lock_name} (bucket id {bucket_id}) -> {value}/{max_hits}"
+            )
             newrelic.agent.record_custom_event(
                 "BucketRateLimit",
                 {"lock_name": lock_name, "bucket_seconds": bucket_seconds},

app/s3.py

@@ -5,19 +5,9 @@ from typing import Optional
 import boto3
 import requests
 
-from app.config import (
-    AWS_REGION,
-    BUCKET,
-    AWS_ACCESS_KEY_ID,
-    AWS_SECRET_ACCESS_KEY,
-    LOCAL_FILE_UPLOAD,
-    UPLOAD_DIR,
-    URL,
-    AWS_ENDPOINT_URL,
-)
+from app import config
 from app.log import LOG
 
-
 _s3_client = None
 
 
@@ -25,12 +15,12 @@ def _get_s3client():
     global _s3_client
     if _s3_client is None:
         args = {
-            "aws_access_key_id": AWS_ACCESS_KEY_ID,
-            "aws_secret_access_key": AWS_SECRET_ACCESS_KEY,
-            "region_name": AWS_REGION,
+            "aws_access_key_id": config.AWS_ACCESS_KEY_ID,
+            "aws_secret_access_key": config.AWS_SECRET_ACCESS_KEY,
+            "region_name": config.AWS_REGION,
         }
-        if AWS_ENDPOINT_URL:
-            args["endpoint_url"] = AWS_ENDPOINT_URL
+        if config.AWS_ENDPOINT_URL:
+            args["endpoint_url"] = config.AWS_ENDPOINT_URL
         _s3_client = boto3.client("s3", **args)
     return _s3_client
 
@@ -38,8 +28,8 @@ def _get_s3client():
 def upload_from_bytesio(key: str, bs: BytesIO, content_type="application/octet-stream"):
     bs.seek(0)
 
-    if LOCAL_FILE_UPLOAD:
-        file_path = os.path.join(UPLOAD_DIR, key)
+    if config.LOCAL_FILE_UPLOAD:
+        file_path = os.path.join(config.UPLOAD_DIR, key)
         file_dir = os.path.dirname(file_path)
         os.makedirs(file_dir, exist_ok=True)
         with open(file_path, "wb") as f:
@@ -47,7 +37,7 @@ def upload_from_bytesio(key: str, bs: BytesIO, content_type="application/octet-s
 
     else:
         _get_s3client().put_object(
-            Bucket=BUCKET,
+            Bucket=config.BUCKET,
             Key=key,
             Body=bs,
             ContentType=content_type,
@@ -57,8 +47,8 @@ def upload_from_bytesio(key: str, bs: BytesIO, content_type="application/octet-s
 def upload_email_from_bytesio(path: str, bs: BytesIO, filename):
     bs.seek(0)
 
-    if LOCAL_FILE_UPLOAD:
-        file_path = os.path.join(UPLOAD_DIR, path)
+    if config.LOCAL_FILE_UPLOAD:
+        file_path = os.path.join(config.UPLOAD_DIR, path)
         file_dir = os.path.dirname(file_path)
         os.makedirs(file_dir, exist_ok=True)
         with open(file_path, "wb") as f:
@@ -66,7 +56,7 @@ def upload_email_from_bytesio(path: str, bs: BytesIO, filename):
 
     else:
         _get_s3client().put_object(
-            Bucket=BUCKET,
+            Bucket=config.BUCKET,
             Key=path,
             Body=bs,
             # Support saving a remote file using Http header
@@ -77,12 +67,12 @@ def upload_email_from_bytesio(path: str, bs: BytesIO, filename):
 
 
 def download_email(path: str) -> Optional[str]:
-    if LOCAL_FILE_UPLOAD:
-        file_path = os.path.join(UPLOAD_DIR, path)
+    if config.LOCAL_FILE_UPLOAD:
+        file_path = os.path.join(config.UPLOAD_DIR, path)
         with open(file_path, "rb") as f:
             return f.read()
     resp = _get_s3client().get_object(
-        Bucket=BUCKET,
+        Bucket=config.BUCKET,
         Key=path,
     )
     if not resp or "Body" not in resp:
@@ -96,29 +86,30 @@ def upload_from_url(url: str, upload_path):
 
 
 def get_url(key: str, expires_in=3600) -> str:
-    if LOCAL_FILE_UPLOAD:
-        return URL + "/static/upload/" + key
+    if config.LOCAL_FILE_UPLOAD:
+        return config.URL + "/static/upload/" + key
     else:
         return _get_s3client().generate_presigned_url(
             ExpiresIn=expires_in,
             ClientMethod="get_object",
-            Params={"Bucket": BUCKET, "Key": key},
+            Params={"Bucket": config.BUCKET, "Key": key},
         )
 
 
 def delete(path: str):
-    if LOCAL_FILE_UPLOAD:
-        os.remove(os.path.join(UPLOAD_DIR, path))
+    if config.LOCAL_FILE_UPLOAD:
+        file_path = os.path.join(config.UPLOAD_DIR, path)
+        os.remove(file_path)
     else:
-        _get_s3client().delete_object(Bucket=BUCKET, Key=path)
+        _get_s3client().delete_object(Bucket=config.BUCKET, Key=path)
 
 
 def create_bucket_if_not_exists():
     s3client = _get_s3client()
     buckets = s3client.list_buckets()
     for bucket in buckets["Buckets"]:
-        if bucket["Name"] == BUCKET:
+        if bucket["Name"] == config.BUCKET:
             LOG.i("Bucket already exists")
             return
-    s3client.create_bucket(Bucket=BUCKET)
-    LOG.i(f"Bucket {BUCKET} created")
+    s3client.create_bucket(Bucket=config.BUCKET)
+    LOG.i(f"Bucket {config.BUCKET} created")

app/subscription_webhook.py

@@ -2,6 +2,8 @@ import requests
 from requests import RequestException
 
 from app import config
+from app.events.event_dispatcher import EventDispatcher
+from app.events.generated.event_pb2 import EventContent, UserPlanChange
 from app.log import LOG
 from app.models import User
 
@@ -31,3 +33,6 @@ def execute_subscription_webhook(user: User):
             )
     except RequestException as e:
         LOG.error(f"Subscription request exception: {e}")
+
+    event = UserPlanChange(plan_end_time=sl_subscription_end)
+    EventDispatcher.send_event(user, EventContent(user_plan_change=event))

cron.py

@@ -5,7 +5,7 @@ from typing import List, Tuple
 
 import arrow
 import requests
-from sqlalchemy import func, desc, or_, and_, nullsfirst
+from sqlalchemy import func, desc, or_, and_
 from sqlalchemy.ext.compiler import compiles
 from sqlalchemy.orm import joinedload
 from sqlalchemy.orm.exc import ObjectDeletedError
@@ -61,6 +61,9 @@ from app.pgp_utils import load_public_key_and_check, PGPException
 from app.proton.utils import get_proton_partner
 from app.utils import sanitize_email
 from server import create_light_app
+from tasks.cleanup_old_imports import cleanup_old_imports
+from tasks.cleanup_old_jobs import cleanup_old_jobs
+from tasks.cleanup_old_notifications import cleanup_old_notifications
 
 DELETE_GRACE_DAYS = 30
 
@@ -1033,6 +1036,61 @@ async def _hibp_check(api_key, queue):
         await asyncio.sleep(rate_sleep)
 
 
+def get_alias_to_check_hibp(
+    oldest_hibp_allowed: arrow.Arrow,
+    user_ids_to_skip: list[int],
+    min_alias_id: int,
+    max_alias_id: int,
+):
+    now = arrow.now()
+    alias_query = (
+        Session.query(Alias)
+        .join(User, User.id == Alias.user_id)
+        .join(Subscription, User.id == Subscription.user_id, isouter=True)
+        .join(ManualSubscription, User.id == ManualSubscription.user_id, isouter=True)
+        .join(AppleSubscription, User.id == AppleSubscription.user_id, isouter=True)
+        .join(
+            CoinbaseSubscription,
+            User.id == CoinbaseSubscription.user_id,
+            isouter=True,
+        )
+        .join(PartnerUser, User.id == PartnerUser.user_id, isouter=True)
+        .join(
+            PartnerSubscription,
+            PartnerSubscription.partner_user_id == PartnerUser.id,
+            isouter=True,
+        )
+        .filter(
+            or_(
+                Alias.hibp_last_check.is_(None),
+                Alias.hibp_last_check < oldest_hibp_allowed,
+            ),
+            Alias.user_id.notin_(user_ids_to_skip),
+            Alias.enabled,
+            Alias.id >= min_alias_id,
+            Alias.id < max_alias_id,
+            User.disabled == False,  # noqa: E712
+            User.enable_data_breach_check,
+            or_(
+                User.lifetime,
+                ManualSubscription.end_at > now,
+                Subscription.next_bill_date > now.date(),
+                AppleSubscription.expires_date > now,
+                CoinbaseSubscription.end_at > now,
+                PartnerSubscription.end_at > now,
+            ),
+        )
+    )
+    if config.HIBP_SKIP_PARTNER_ALIAS:
+        alias_query = alias_query.filter(
+            Alias.flags.op("&")(Alias.FLAG_PARTNER_CREATED) == 0
+        )
+    for alias in (
+        alias_query.order_by(Alias.id.asc()).enable_eagerloads(False).yield_per(500)
+    ):
+        yield alias
+
+
 async def check_hibp():
     """
     Check all aliases on the HIBP (Have I Been Pwned) API
@@ -1063,28 +1121,20 @@ async def check_hibp():
     queue = asyncio.Queue()
     min_alias_id = 0
     max_alias_id = Session.query(func.max(Alias.id)).scalar()
-    step = 500
-    max_date = arrow.now().shift(days=-config.HIBP_SCAN_INTERVAL_DAYS)
+    step = 10000
+    now = arrow.now()
+    oldest_hibp_allowed = now.shift(days=-config.HIBP_SCAN_INTERVAL_DAYS)
     alias_checked = 0
     for alias_batch_id in range(min_alias_id, max_alias_id, step):
-        alias_query = Alias.filter(
-            or_(Alias.hibp_last_check.is_(None), Alias.hibp_last_check < max_date),
-            Alias.user_id.notin_(user_ids),
-            Alias.enabled,
-            Alias.id >= alias_batch_id,
-            Alias.id < alias_batch_id + step,
-        )
-        if config.HIBP_SKIP_PARTNER_ALIAS:
-            alias_query = alias_query(
-                Alias.flags.op("&")(Alias.FLAG_PARTNER_CREATED) == 0
-            )
-        for alias in alias_query.order_by(
-            nullsfirst(Alias.hibp_last_check.asc()), Alias.id.asc()
-        ).enable_eagerloads(False):
+        for alias in get_alias_to_check_hibp(
+            oldest_hibp_allowed, user_ids, alias_batch_id, alias_batch_id + step
+        ):
             await queue.put(alias.id)
 
         alias_checked += queue.qsize()
-        LOG.d("Need to check about %s aliases in this loop", queue.qsize())
+        LOG.d(
+            f"Need to check about {queue.qsize()} aliases in this loop {alias_batch_id}/{max_alias_id}"
+        )
 
         # Start one checking process per API key
         # Each checking process will take one alias from the queue, get the info
@@ -1175,6 +1225,13 @@ def clear_users_scheduled_to_be_deleted(dry_run=False):
         Session.commit()
 
 
+def delete_old_data():
+    oldest_valid = arrow.now().shift(days=-config.KEEP_OLD_DATA_DAYS)
+    cleanup_old_imports(oldest_valid)
+    cleanup_old_jobs(oldest_valid)
+    cleanup_old_notifications(oldest_valid)
+
+
 if __name__ == "__main__":
     LOG.d("Start running cronjob")
     parser = argparse.ArgumentParser()
@@ -1189,6 +1246,7 @@ if __name__ == "__main__":
             "notify_manual_subscription_end",
             "notify_premium_end",
             "delete_logs",
+            "delete_old_data",
             "poll_apple_subscription",
             "sanity_check",
             "delete_old_monitoring",
@@ -1217,6 +1275,9 @@ if __name__ == "__main__":
         elif args.job == "delete_logs":
             LOG.d("Deleted Logs")
             delete_logs()
+        elif args.job == "delete_old_data":
+            LOG.d("Delete old data")
+            delete_old_data()
         elif args.job == "poll_apple_subscription":
             LOG.d("Poll Apple Subscriptions")
             poll_apple_subscription()

crontab.yml

@@ -37,6 +37,12 @@ jobs:
     schedule: "15 5 * * *"
     captureStderr: true
 
+  - name: SimpleLogin Delete Old data
+    command: python /code/cron.py -j delete_old_data
+    shell: /bin/bash
+    schedule: "30 5 * * *"
+    captureStderr: true
+
   - name: SimpleLogin Poll Apple Subscriptions
     command: python /code/cron.py -j poll_apple_subscription
     shell: /bin/bash

email_handler.py

@@ -53,7 +53,7 @@ from flanker.addresslib.address import EmailAddress
 from sqlalchemy.exc import IntegrityError
 
 from app import pgp_utils, s3, config
-from app.alias_utils import try_auto_create
+from app.alias_utils import try_auto_create, change_alias_status
 from app.config import (
     EMAIL_DOMAIN,
     URL,
@@ -875,6 +875,7 @@ def forward_email_to_mailbox(
         # References and In-Reply-To are used for keeping the email thread
         headers.REFERENCES,
         headers.IN_REPLY_TO,
+        headers.SL_QUEUE_ID,
         headers.LIST_UNSUBSCRIBE,
         headers.LIST_UNSUBSCRIBE_POST,
     ] + headers.MIME_HEADERS
@@ -1179,6 +1180,7 @@ def handle_reply(envelope, msg: Message, rcpt_to: str) -> (bool, str):
             # References and In-Reply-To are used for keeping the email thread
             headers.REFERENCES,
             headers.IN_REPLY_TO,
+            headers.SL_QUEUE_ID,
         ]
         + headers.MIME_HEADERS,
     )
@@ -1583,7 +1585,7 @@ def handle_bounce_forward_phase(msg: Message, email_log: EmailLog):
         LOG.w(
             f"Disable alias {alias} because {reason}. {alias.mailboxes} {alias.user}. Last contact {contact}"
         )
-        alias.enabled = False
+        change_alias_status(alias, enabled=False)
 
         Notification.create(
             user_id=user.id,
@@ -2040,10 +2042,11 @@ def handle(envelope: Envelope, msg: Message) -> str:
         return status.E204
 
     # sanitize email headers
-    sanitize_header(msg, "from")
-    sanitize_header(msg, "to")
-    sanitize_header(msg, "cc")
-    sanitize_header(msg, "reply-to")
+    sanitize_header(msg, headers.FROM)
+    sanitize_header(msg, headers.TO)
+    sanitize_header(msg, headers.CC)
+    sanitize_header(msg, headers.REPLY_TO)
+    sanitize_header(msg, headers.MESSAGE_ID)
 
     LOG.d(
         "==>> Handle mail_from:%s, rcpt_tos:%s, header_from:%s, header_to:%s, "

event_listener.py

@@ -0,0 +1,64 @@
+import argparse
+from enum import Enum
+from sys import argv, exit
+
+from app.config import DB_URI
+from app.log import LOG
+from events.runner import Runner
+from events.event_source import DeadLetterEventSource, PostgresEventSource
+from events.event_sink import ConsoleEventSink, HttpEventSink
+
+
+class Mode(Enum):
+    DEAD_LETTER = "dead_letter"
+    LISTENER = "listener"
+
+    @staticmethod
+    def from_str(value: str):
+        if value == Mode.DEAD_LETTER.value:
+            return Mode.DEAD_LETTER
+        elif value == Mode.LISTENER.value:
+            return Mode.LISTENER
+        else:
+            raise ValueError(f"Invalid mode: {value}")
+
+
+def main(mode: Mode, dry_run: bool):
+    if mode == Mode.DEAD_LETTER:
+        LOG.i("Using DeadLetterEventSource")
+        source = DeadLetterEventSource()
+    elif mode == Mode.LISTENER:
+        LOG.i("Using PostgresEventSource")
+        source = PostgresEventSource(DB_URI)
+    else:
+        raise ValueError(f"Invalid mode: {mode}")
+
+    if dry_run:
+        LOG.i("Starting with ConsoleEventSink")
+        sink = ConsoleEventSink()
+    else:
+        LOG.i("Starting with HttpEventSink")
+        sink = HttpEventSink()
+
+    runner = Runner(source=source, sink=sink)
+    runner.run()
+
+
+def args():
+    parser = argparse.ArgumentParser(description="Run event listener")
+    parser.add_argument(
+        "mode",
+        help="Mode to run",
+        choices=[Mode.DEAD_LETTER.value, Mode.LISTENER.value],
+    )
+    parser.add_argument("--dry-run", help="Dry run mode", action="store_true")
+    return parser.parse_args()
+
+
+if __name__ == "__main__":
+    if len(argv) < 2:
+        print("Invalid usage. Pass 'listener' or 'dead_letter' as argument")
+        exit(1)
+
+    args = args()
+    main(Mode.from_str(args.mode), args.dry_run)

events/event_sink.py

@@ -0,0 +1,42 @@
+import requests
+
+from abc import ABC, abstractmethod
+from app.config import EVENT_WEBHOOK, EVENT_WEBHOOK_SKIP_VERIFY_SSL
+from app.log import LOG
+from app.models import SyncEvent
+
+
+class EventSink(ABC):
+    @abstractmethod
+    def process(self, event: SyncEvent) -> bool:
+        pass
+
+
+class HttpEventSink(EventSink):
+    def process(self, event: SyncEvent) -> bool:
+        if not EVENT_WEBHOOK:
+            LOG.warning("Skipping sending event because there is no webhook configured")
+            return False
+
+        LOG.info(f"Sending event {event.id} to {EVENT_WEBHOOK}")
+
+        res = requests.post(
+            url=EVENT_WEBHOOK,
+            data=event.content,
+            headers={"Content-Type": "application/x-protobuf"},
+            verify=not EVENT_WEBHOOK_SKIP_VERIFY_SSL,
+        )
+        if res.status_code != 200:
+            LOG.warning(
+                f"Failed to send event to webhook: {res.status_code} {res.text}"
+            )
+            return False
+        else:
+            LOG.info(f"Event {event.id} sent successfully to webhook")
+            return True
+
+
+class ConsoleEventSink(EventSink):
+    def process(self, event: SyncEvent) -> bool:
+        LOG.info(f"Handling event {event.id}")
+        return True

events/event_source.py

@@ -0,0 +1,100 @@
+import arrow
+import newrelic.agent
+import psycopg2
+import select
+
+from abc import ABC, abstractmethod
+from app.log import LOG
+from app.models import SyncEvent
+from app.events.event_dispatcher import NOTIFICATION_CHANNEL
+from time import sleep
+from typing import Callable, NoReturn
+
+_DEAD_LETTER_THRESHOLD_MINUTES = 10
+_DEAD_LETTER_INTERVAL_SECONDS = 30
+
+_POSTGRES_RECONNECT_INTERVAL_SECONDS = 5
+
+
+class EventSource(ABC):
+    @abstractmethod
+    def run(self, on_event: Callable[[SyncEvent], NoReturn]):
+        pass
+
+
+class PostgresEventSource(EventSource):
+    def __init__(self, connection_string: str):
+        self.__connection_string = connection_string
+        self.__connect()
+
+    def run(self, on_event: Callable[[SyncEvent], NoReturn]):
+        while True:
+            try:
+                self.__listen(on_event)
+            except Exception as e:
+                LOG.warn(f"Error listening to events: {e}")
+                sleep(_POSTGRES_RECONNECT_INTERVAL_SECONDS)
+                self.__connect()
+
+    def __listen(self, on_event: Callable[[SyncEvent], NoReturn]):
+        self.__connection.set_isolation_level(
+            psycopg2.extensions.ISOLATION_LEVEL_AUTOCOMMIT
+        )
+
+        cursor = self.__connection.cursor()
+        cursor.execute(f"LISTEN {NOTIFICATION_CHANNEL};")
+
+        while True:
+            if select.select([self.__connection], [], [], 5) != ([], [], []):
+                self.__connection.poll()
+                while self.__connection.notifies:
+                    notify = self.__connection.notifies.pop(0)
+                    LOG.debug(
+                        f"Got NOTIFY: pid={notify.pid} channel={notify.channel} payload={notify.payload}"
+                    )
+                    try:
+                        webhook_id = int(notify.payload)
+                        event = SyncEvent.get_by(id=webhook_id)
+                        if event is not None:
+                            if event.mark_as_taken():
+                                on_event(event)
+                            else:
+                                LOG.info(
+                                    f"Event {event.id} was handled by another runner"
+                                )
+                        else:
+                            LOG.info(f"Could not find event with id={notify.payload}")
+                    except Exception as e:
+                        LOG.warn(f"Error getting event: {e}")
+
+    def __connect(self):
+        self.__connection = psycopg2.connect(self.__connection_string)
+
+        from app.db import Session
+
+        Session.close()
+
+
+class DeadLetterEventSource(EventSource):
+    @newrelic.agent.background_task()
+    def run(self, on_event: Callable[[SyncEvent], NoReturn]):
+        while True:
+            try:
+                threshold = arrow.utcnow().shift(
+                    minutes=-_DEAD_LETTER_THRESHOLD_MINUTES
+                )
+                events = SyncEvent.get_dead_letter(older_than=threshold)
+                if events:
+                    LOG.info(f"Got {len(events)} dead letter events")
+                    if events:
+                        newrelic.agent.record_custom_metric(
+                            "Custom/dead_letter_events_to_process", len(events)
+                        )
+                    for event in events:
+                        on_event(event)
+                else:
+                    LOG.debug("No dead letter events")
+                    sleep(_DEAD_LETTER_INTERVAL_SECONDS)
+            except Exception as e:
+                LOG.warn(f"Error getting dead letter event: {e}")
+                sleep(_DEAD_LETTER_INTERVAL_SECONDS)

events/runner.py

@@ -0,0 +1,42 @@
+import arrow
+import newrelic.agent
+
+from app.log import LOG
+from app.models import SyncEvent
+from events.event_sink import EventSink
+from events.event_source import EventSource
+
+
+class Runner:
+    def __init__(self, source: EventSource, sink: EventSink):
+        self.__source = source
+        self.__sink = sink
+
+    def run(self):
+        self.__source.run(self.__on_event)
+
+    @newrelic.agent.background_task()
+    def __on_event(self, event: SyncEvent):
+        try:
+            event_created_at = event.created_at
+            start_time = arrow.now()
+            success = self.__sink.process(event)
+            if success:
+                event_id = event.id
+                SyncEvent.delete(event.id, commit=True)
+                LOG.info(f"Marked {event_id} as done")
+
+                end_time = arrow.now() - start_time
+                time_between_taken_and_created = start_time - event_created_at
+
+                newrelic.agent.record_custom_metric("Custom/sync_event_processed", 1)
+                newrelic.agent.record_custom_metric(
+                    "Custom/sync_event_process_time", end_time.total_seconds()
+                )
+                newrelic.agent.record_custom_metric(
+                    "Custom/sync_event_elapsed_time",
+                    time_between_taken_and_created.total_seconds(),
+                )
+        except Exception as e:
+            LOG.warn(f"Exception processing event [id={event.id}]: {e}")
+            newrelic.agent.record_custom_metric("Custom/sync_event_failed", 1)

example.env

@@ -118,9 +118,7 @@ WORDS_FILE_PATH=local_data/test_words.txt
 
 # Login with OIDC
 # CONNECT_WITH_OIDC_ICON=fa-github
-# OIDC_AUTHORIZATION_URL=to_fill
-# OIDC_USER_INFO_URL=to_fill
-# OIDC_TOKEN_URL=to_fill
+# OIDC_WELL_KNOWN_URL=to_fill
 # OIDC_SCOPES=openid email profile
 # OIDC_NAME_FIELD=name
 # OIDC_CLIENT_ID=to_fill

migrations/versions/2024_040913_fa2f19bb4e5a_.py

@@ -0,0 +1,29 @@
+"""empty message
+
+Revision ID: fa2f19bb4e5a
+Revises: 52510a633d6f
+Create Date: 2024-04-09 13:12:26.305340
+
+"""
+import sqlalchemy_utils
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = 'fa2f19bb4e5a'
+down_revision = '52510a633d6f'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('users', sa.Column('enable_data_breach_check', sa.Boolean(), server_default='0', nullable=False))
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('users', 'enable_data_breach_check')
+    # ### end Alembic commands ###

migrations/versions/2024_051713_06a9a7133445_.py

@@ -0,0 +1,38 @@
+"""Create sync_event table
+
+Revision ID: 06a9a7133445
+Revises: fa2f19bb4e5a
+Create Date: 2024-05-17 13:11:20.402259
+
+"""
+import sqlalchemy_utils
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '06a9a7133445'
+down_revision = 'fa2f19bb4e5a'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('sync_event',
+    sa.Column('id', sa.Integer(), autoincrement=True, nullable=False),
+    sa.Column('created_at', sqlalchemy_utils.types.arrow.ArrowType(), nullable=False),
+    sa.Column('updated_at', sqlalchemy_utils.types.arrow.ArrowType(), nullable=True),
+    sa.Column('content', sa.LargeBinary(), nullable=False),
+    sa.Column('taken_time', sqlalchemy_utils.types.arrow.ArrowType(), nullable=True),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_sync_event_created_at'), 'sync_event', ['created_at'], unique=False)
+    op.create_index(op.f('ix_sync_event_taken_time'), 'sync_event', ['taken_time'], unique=False)
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_table('sync_event')
+    # ### end Alembic commands ###

monitoring.py

@@ -4,6 +4,7 @@ import subprocess
 from time import sleep
 from typing import List, Dict
 
+import arrow
 import newrelic.agent
 
 from app.db import Session
@@ -93,11 +94,44 @@ def log_nb_db_connection():
     newrelic.agent.record_custom_metric("Custom/nb_db_connections", nb_connection)
 
 
+@newrelic.agent.background_task()
+def log_pending_to_process_events():
+    r = Session.execute("select count(*) from sync_event WHERE taken_time IS NULL;")
+    events_pending = list(r)[0][0]
+
+    LOG.d("number of events pending to process %s", events_pending)
+    newrelic.agent.record_custom_metric(
+        "Custom/sync_events_pending_to_process", events_pending
+    )
+
+
+@newrelic.agent.background_task()
+def log_events_pending_dead_letter():
+    since = arrow.now().shift(minutes=-10).datetime
+    r = Session.execute(
+        """
+        SELECT COUNT(*)
+        FROM sync_event
+        WHERE (taken_time IS NOT NULL AND taken_time < :since)
+           OR (taken_time IS NULL AND created_at < :since)
+        """,
+        {"since": since},
+    )
+    events_pending = list(r)[0][0]
+
+    LOG.d("number of events pending dead letter %s", events_pending)
+    newrelic.agent.record_custom_metric(
+        "Custom/sync_events_pending_dead_letter", events_pending
+    )
+
+
 if __name__ == "__main__":
     exporter = MetricExporter(get_newrelic_license())
     while True:
         log_postfix_metrics()
         log_nb_db_connection()
+        log_pending_to_process_events()
+        log_events_pending_dead_letter()
         Session.close()
 
         exporter.run()

proto/event.proto

@@ -0,0 +1,45 @@
+syntax = "proto3";
+
+package simplelogin_events;
+
+message UserPlanChange {
+  uint32 plan_end_time = 1;
+}
+
+message UserDeleted {
+}
+
+message AliasCreated {
+  uint32 alias_id = 1;
+  string alias_email = 2;
+  string alias_note = 3;
+  bool enabled = 4;
+}
+
+message AliasStatusChange {
+  uint32 alias_id = 1;
+  string alias_email = 2;
+  bool enabled = 3;
+}
+
+message AliasDeleted {
+  uint32 alias_id = 1;
+  string alias_email = 2;
+}
+
+message EventContent {
+  oneof content {
+    UserPlanChange user_plan_change = 1;
+    UserDeleted user_deleted = 2;
+    AliasCreated alias_created = 3;
+    AliasStatusChange alias_status_change = 4;
+    AliasDeleted alias_deleted = 5;
+  }
+}
+
+message Event {
+  uint32 user_id = 1;
+  string external_user_id = 2;
+  uint32 partner_id = 3;
+  EventContent content = 4;
+}

pyproject.toml

@@ -14,13 +14,14 @@ exclude = '''
     | build
     | dist
     | migrations    # migrations/ is generated by alembic
+    | app/events/generated
   )/
 )
 '''
 
 [tool.ruff]
 ignore-init-module-imports = true
-exclude = [".venv", "migrations"]
+exclude = [".venv", "migrations", "app/events/generated"]
 
 [tool.djlint]
 indent = 2

scripts/generate-proto-files.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+set -euxo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" || exit 1; pwd -P)"
+REPO_ROOT=$(echo "${SCRIPT_DIR}" | sed 's:scripts::g')
+
+DEST_DIR="${REPO_ROOT}/app/events/generated"
+
+PROTOC=${PROTOC:-"protoc"}
+
+if ! eval "${PROTOC} --version" &> /dev/null ; then
+  echo "Cannot find $PROTOC"
+  exit 1
+fi
+
+rm -rf "${DEST_DIR}"
+mkdir -p "${DEST_DIR}"
+
+pushd $REPO_ROOT || exit 1
+
+eval "${PROTOC} --proto_path=proto --python_out=\"${DEST_DIR}\" --pyi_out=\"${DEST_DIR}\" proto/event.proto"
+
+popd || exit 1

tasks/cleanup_old_imports.py

@@ -0,0 +1,19 @@
+import arrow
+
+from app import s3
+from app.log import LOG
+from app.models import BatchImport
+
+
+def cleanup_old_imports(oldest_allowed: arrow.Arrow):
+    LOG.i(f"Deleting imports older than {oldest_allowed}")
+    for batch_import in (
+        BatchImport.filter(BatchImport.created_at < oldest_allowed).yield_per(500).all()
+    ):
+        LOG.i(
+            f"Deleting batch import {batch_import} with file {batch_import.file.path}"
+        )
+        file = batch_import.file
+        if file is not None:
+            s3.delete(file.path)
+        BatchImport.delete(batch_import.id, commit=True)

tasks/cleanup_old_jobs.py

@@ -0,0 +1,24 @@
+import arrow
+from sqlalchemy import or_, and_
+
+from app import config
+from app.db import Session
+from app.log import LOG
+from app.models import Job, JobState
+
+
+def cleanup_old_jobs(oldest_allowed: arrow.Arrow):
+    LOG.i(f"Deleting jobs older than {oldest_allowed}")
+    count = Job.filter(
+        or_(
+            Job.state == JobState.done.value,
+            Job.state == JobState.error.value,
+            and_(
+                Job.state == JobState.taken.value,
+                Job.attempts >= config.JOB_MAX_ATTEMPTS,
+            ),
+        ),
+        Job.updated_at < oldest_allowed,
+    ).delete()
+    Session.commit()
+    LOG.i(f"Deleted {count} jobs")

tasks/cleanup_old_notifications.py

@@ -0,0 +1,12 @@
+import arrow
+
+from app.db import Session
+from app.log import LOG
+from app.models import Notification
+
+
+def cleanup_old_notifications(oldest_allowed: arrow.Arrow):
+    LOG.i(f"Deleting notifications older than {oldest_allowed}")
+    count = Notification.filter(Notification.created_at < oldest_allowed).delete()
+    Session.commit()
+    LOG.i(f"Deleted {count} notifications")

templates/dashboard/setting.html

@@ -249,6 +249,42 @@
       </div>
     </div>
     <!-- END Random alias -->
+    <!-- Data breach check -->
+    <div class="card" id="data-breach">
+      <div class="card-body">
+        <div class="card-title">Data breach monitoring</div>
+        <div class="mt-1 mb-3">
+          {% if not current_user.is_premium() %}
+
+            <div class="alert alert-info" role="alert">
+              This feature is only available on Premium plan.
+              <a href="{{ url_for('dashboard.pricing') }}"
+                 target="_blank"
+                 rel="noopener noreferrer">
+                Upgrade<i class="fe fe-external-link"></i>
+              </a>
+            </div>
+          {% endif %}
+          If enabled, we will inform you via email if one of your aliases appears in a data breach.
+          <br>
+          SimpleLogin uses <a href="https://haveibeenpwned.com/">HaveIBeenPwned</a> API for checking for data breaches.
+        </div>
+        <form method="post" action="#data-breach">
+          {{ csrf_form.csrf_token }}
+          <input type="hidden" name="form-name" value="enable_data_breach_check">
+          <div class="form-check">
+            <input type="checkbox"
+                   id="enable_data_breach_check"
+                   name="enable_data_breach_check"
+                   {% if current_user.enable_data_breach_check %} checked{% endif %}
+                   class="form-check-input">
+            <label for="enable_data_breach_check">Enable data breach monitoring</label>
+          </div>
+          <button type="submit" class="btn btn-outline-primary">Update</button>
+        </form>
+      </div>
+    </div>
+    <!-- END Data breach check -->
     <!-- Sender Format -->
     <div class="card" id="sender-format">
       <div class="card-body">
@@ -285,7 +321,9 @@
               No Name (i.e. only reverse-alias)
             </option>
           </select>
-          <button class="btn btn-outline-primary mt-3">Update</button>
+          <button class="btn btn-outline-primary mt-3">
+            Update
+          </button>
         </form>
       </div>
     </div>
@@ -295,7 +333,9 @@
       <div class="card-body">
         <div class="card-title">
           Reverse Alias Replacement
-          <div class="badge badge-warning">Experimental</div>
+          <div class="badge badge-warning">
+            Experimental
+          </div>
         </div>
         <div class="mb-3">
           When replying to a forwarded email, the <b>reverse-alias</b> can be automatically included
@@ -312,9 +352,13 @@
                    name="replace-ra"
                    {% if current_user.replace_reverse_alias %} checked{% endif %}
                    class="form-check-input">
-            <label for="replace-ra">Enable replacing reverse alias</label>
+            <label for="replace-ra">
+              Enable replacing reverse alias
+            </label>
           </div>
-          <button type="submit" class="btn btn-outline-primary">Update</button>
+          <button type="submit" class="btn btn-outline-primary">
+            Update
+          </button>
         </form>
       </div>
     </div>

templates/menu.html

@@ -48,15 +48,16 @@
   {#      SIWSL#}
   {#    </a>#}
   {#  </li>#}
-  {#  {% if current_user.should_show_app_page() %}#}
-  {#    <li class="nav-item">#}
-  {#      <a href="{{ url_for('dashboard.app_route') }}"#}
-  {#         class="nav-link {{ 'active' if active_page == 'app' }}">#}
-  {#        <i class="fe fe-grid"></i>#}
-  {#        Apps#}
-  {#      </a>#}
-  {#    </li>#}
-  {#  {% endif %}#}
+  {% if current_user.should_show_app_page() %}
+
+    <li class="nav-item">
+      <a href="{{ url_for('dashboard.app_route') }}"
+         class="nav-link {{ 'active' if active_page == 'app' }}">
+        <i class="fe fe-grid"></i>
+        Apps
+      </a>
+    </li>
+  {% endif %}
   <li class="nav-item">
     <a href="{{ url_for('dashboard.setting') }}"
        class="nav-link {{ 'active' if active_page == 'setting' }}">

tests/auth/test_oidc.py

@@ -1,5 +1,5 @@
 from app import config
-from flask import url_for
+from flask import url_for, session
 from urllib.parse import parse_qs
 from urllib3.util import parse_url
 from app.auth.views.oidc import create_user
@@ -10,7 +10,21 @@ from app.models import User
 from app.config import URL, OIDC_CLIENT_ID
 
 
-def test_oidc_login(flask_client):
+mock_well_known_response = {
+    "authorization_endpoint": "http://localhost:7777/authorization-endpoint",
+    "userinfo_endpoint": "http://localhost:7777/userinfo-endpoint",
+    "token_endpoint": "http://localhost:7777/token-endpoint",
+}
+
+
+@patch("requests.get")
+def test_oidc_login(mock_get, flask_client):
+    config.OIDC_WELL_KNOWN_URL = "http://localhost:7777/well-known-url"
+    with flask_client.session_transaction() as sess:
+        sess["oauth_redirect_next"] = None
+
+    mock_get.return_value.json.return_value = mock_well_known_response
+
     r = flask_client.get(
         url_for("auth.oidc_login"),
         follow_redirects=False,
@@ -28,8 +42,41 @@ def test_oidc_login(flask_client):
     assert expected_redirect_url == query["redirect_uri"][0]
 
 
-def test_oidc_login_no_client_id(flask_client):
+@patch("requests.get")
+def test_oidc_login_next_url(mock_get, flask_client):
+    config.OIDC_WELL_KNOWN_URL = "http://localhost:7777/well-known-url"
+    with flask_client.session_transaction() as sess:
+        sess["oauth_redirect_next"] = None
+
+    mock_get.return_value.json.return_value = mock_well_known_response
+
+    with flask_client:
+        r = flask_client.get(
+            url_for("auth.oidc_login", next="/dashboard/settings/"),
+            follow_redirects=False,
+        )
+        location = r.headers.get("Location")
+        assert location is not None
+
+        parsed = parse_url(location)
+        query = parse_qs(parsed.query)
+
+        expected_redirect_url = f"{URL}/auth/oidc/callback"
+
+        assert "code" == query["response_type"][0]
+        assert OIDC_CLIENT_ID == query["client_id"][0]
+        assert expected_redirect_url == query["redirect_uri"][0]
+        assert session["oauth_redirect_next"] == "/dashboard/settings/"
+
+
+@patch("requests.get")
+def test_oidc_login_no_client_id(mock_get, flask_client):
     config.OIDC_CLIENT_ID = None
+    config.OIDC_WELL_KNOWN_URL = "http://localhost:7777/well-known-url"
+    with flask_client.session_transaction() as sess:
+        sess["oauth_redirect_next"] = None
+
+    mock_get.return_value.json.return_value = mock_well_known_response
 
     r = flask_client.get(
         url_for("auth.oidc_login"),
@@ -47,8 +94,14 @@ def test_oidc_login_no_client_id(flask_client):
     config.OIDC_CLIENT_ID = "to_fill"
 
 
-def test_oidc_login_no_client_secret(flask_client):
+@patch("requests.get")
+def test_oidc_login_no_client_secret(mock_get, flask_client):
     config.OIDC_CLIENT_SECRET = None
+    config.OIDC_WELL_KNOWN_URL = "http://localhost:7777/well-known-url"
+    with flask_client.session_transaction() as sess:
+        sess["oauth_redirect_next"] = None
+
+    mock_get.return_value.json.return_value = mock_well_known_response
 
     r = flask_client.get(
         url_for("auth.oidc_login"),
@@ -66,9 +119,14 @@ def test_oidc_login_no_client_secret(flask_client):
     config.OIDC_CLIENT_SECRET = "to_fill"
 
 
-def test_oidc_callback_no_oauth_state(flask_client):
-    with flask_client.session_transaction() as session:
-        session["oauth_state"] = None
+@patch("requests.get")
+def test_oidc_callback_no_oauth_state(mock_get, flask_client):
+    config.OIDC_WELL_KNOWN_URL = "http://localhost:7777/well-known-url"
+    with flask_client.session_transaction() as sess:
+        sess["oauth_redirect_next"] = None
+        sess["oauth_state"] = None
+
+    mock_get.return_value.json.return_value = mock_well_known_response
 
     r = flask_client.get(
         url_for("auth.oidc_callback"),
@@ -78,11 +136,16 @@ def test_oidc_callback_no_oauth_state(flask_client):
     assert location is None
 
 
-def test_oidc_callback_no_client_id(flask_client):
-    with flask_client.session_transaction() as session:
-        session["oauth_state"] = "state"
+@patch("requests.get")
+def test_oidc_callback_no_client_id(mock_get, flask_client):
+    config.OIDC_WELL_KNOWN_URL = "http://localhost:7777/well-known-url"
+    with flask_client.session_transaction() as sess:
+        sess["oauth_redirect_next"] = None
+        sess["oauth_state"] = "state"
     config.OIDC_CLIENT_ID = None
 
+    mock_get.return_value.json.return_value = mock_well_known_response
+
     r = flask_client.get(
         url_for("auth.oidc_callback"),
         follow_redirects=False,
@@ -97,15 +160,20 @@ def test_oidc_callback_no_client_id(flask_client):
     assert expected_redirect_url == parsed.path
 
     config.OIDC_CLIENT_ID = "to_fill"
-    with flask_client.session_transaction() as session:
-        session["oauth_state"] = None
+    with flask_client.session_transaction() as sess:
+        sess["oauth_state"] = None
 
 
-def test_oidc_callback_no_client_secret(flask_client):
-    with flask_client.session_transaction() as session:
-        session["oauth_state"] = "state"
+@patch("requests.get")
+def test_oidc_callback_no_client_secret(mock_get, flask_client):
+    config.OIDC_WELL_KNOWN_URL = "http://localhost:7777/well-known-url"
+    with flask_client.session_transaction() as sess:
+        sess["oauth_redirect_next"] = None
+        sess["oauth_state"] = "state"
     config.OIDC_CLIENT_SECRET = None
 
+    mock_get.return_value.json.return_value = mock_well_known_response
+
     r = flask_client.get(
         url_for("auth.oidc_callback"),
         follow_redirects=False,
@@ -120,16 +188,23 @@ def test_oidc_callback_no_client_secret(flask_client):
     assert expected_redirect_url == parsed.path
 
     config.OIDC_CLIENT_SECRET = "to_fill"
-    with flask_client.session_transaction() as session:
-        session["oauth_state"] = None
+    with flask_client.session_transaction() as sess:
+        sess["oauth_state"] = None
 
 
+@patch("requests.get")
 @patch("requests_oauthlib.OAuth2Session.fetch_token")
 @patch("requests_oauthlib.OAuth2Session.get")
-def test_oidc_callback_invalid_user(mock_get, mock_fetch_token, flask_client):
-    mock_get.return_value = MockResponse(400, {})
-    with flask_client.session_transaction() as session:
-        session["oauth_state"] = "state"
+def test_oidc_callback_invalid_user(
+    mock_oauth_get, mock_fetch_token, mock_get, flask_client
+):
+    mock_oauth_get.return_value = MockResponse(400, {})
+    config.OIDC_WELL_KNOWN_URL = "http://localhost:7777/well-known-url"
+    with flask_client.session_transaction() as sess:
+        sess["oauth_redirect_next"] = None
+        sess["oauth_state"] = "state"
+
+    mock_get.return_value.json.return_value = mock_well_known_response
 
     r = flask_client.get(
         url_for("auth.oidc_callback"),
@@ -143,18 +218,25 @@ def test_oidc_callback_invalid_user(mock_get, mock_fetch_token, flask_client):
     expected_redirect_url = "/auth/login"
 
     assert expected_redirect_url == parsed.path
-    assert mock_get.called
+    assert mock_oauth_get.called
 
-    with flask_client.session_transaction() as session:
-        session["oauth_state"] = None
+    with flask_client.session_transaction() as sess:
+        sess["oauth_state"] = None
 
 
+@patch("requests.get")
 @patch("requests_oauthlib.OAuth2Session.fetch_token")
 @patch("requests_oauthlib.OAuth2Session.get")
-def test_oidc_callback_no_email(mock_get, mock_fetch_token, flask_client):
-    mock_get.return_value = MockResponse(200, {})
-    with flask_client.session_transaction() as session:
-        session["oauth_state"] = "state"
+def test_oidc_callback_no_email(
+    mock_oauth_get, mock_fetch_token, mock_get, flask_client
+):
+    mock_oauth_get.return_value = MockResponse(200, {})
+    config.OIDC_WELL_KNOWN_URL = "http://localhost:7777/well-known-url"
+    with flask_client.session_transaction() as sess:
+        sess["oauth_redirect_next"] = None
+        sess["oauth_state"] = "state"
+
+    mock_get.return_value.json.return_value = mock_well_known_response
 
     r = flask_client.get(
         url_for("auth.oidc_callback"),
@@ -168,20 +250,27 @@ def test_oidc_callback_no_email(mock_get, mock_fetch_token, flask_client):
     expected_redirect_url = "/auth/login"
 
     assert expected_redirect_url == parsed.path
-    assert mock_get.called
+    assert mock_oauth_get.called
 
     with flask_client.session_transaction() as session:
         session["oauth_state"] = None
 
 
+@patch("requests.get")
 @patch("requests_oauthlib.OAuth2Session.fetch_token")
 @patch("requests_oauthlib.OAuth2Session.get")
-def test_oidc_callback_disabled_registration(mock_get, mock_fetch_token, flask_client):
+def test_oidc_callback_disabled_registration(
+    mock_oauth_get, mock_fetch_token, mock_get, flask_client
+):
     config.DISABLE_REGISTRATION = True
     email = random_string()
-    mock_get.return_value = MockResponse(200, {"email": email})
-    with flask_client.session_transaction() as session:
-        session["oauth_state"] = "state"
+    mock_oauth_get.return_value = MockResponse(200, {"email": email})
+    config.OIDC_WELL_KNOWN_URL = "http://localhost:7777/well-known-url"
+    with flask_client.session_transaction() as sess:
+        sess["oauth_redirect_next"] = None
+        sess["oauth_state"] = "state"
+
+    mock_get.return_value.json.return_value = mock_well_known_response
 
     r = flask_client.get(
         url_for("auth.oidc_callback"),
@@ -195,26 +284,33 @@ def test_oidc_callback_disabled_registration(mock_get, mock_fetch_token, flask_c
     expected_redirect_url = "/auth/register"
 
     assert expected_redirect_url == parsed.path
-    assert mock_get.called
+    assert mock_oauth_get.called
 
     config.DISABLE_REGISTRATION = False
-    with flask_client.session_transaction() as session:
-        session["oauth_state"] = None
+    with flask_client.session_transaction() as sess:
+        sess["oauth_state"] = None
 
 
+@patch("requests.get")
 @patch("requests_oauthlib.OAuth2Session.fetch_token")
 @patch("requests_oauthlib.OAuth2Session.get")
-def test_oidc_callback_registration(mock_get, mock_fetch_token, flask_client):
+def test_oidc_callback_registration(
+    mock_oauth_get, mock_fetch_token, mock_get, flask_client
+):
     email = random_string()
-    mock_get.return_value = MockResponse(
+    mock_oauth_get.return_value = MockResponse(
         200,
         {
             "email": email,
             config.OIDC_NAME_FIELD: "name",
         },
     )
-    with flask_client.session_transaction() as session:
-        session["oauth_state"] = "state"
+    config.OIDC_WELL_KNOWN_URL = "http://localhost:7777/well-known-url"
+    with flask_client.session_transaction() as sess:
+        sess["oauth_redirect_next"] = None
+        sess["oauth_state"] = "state"
+
+    mock_get.return_value.json.return_value = mock_well_known_response
 
     user = User.get_by(email=email)
     assert user is None
@@ -231,28 +327,33 @@ def test_oidc_callback_registration(mock_get, mock_fetch_token, flask_client):
     expected_redirect_url = "/dashboard/"
 
     assert expected_redirect_url == parsed.path
-    assert mock_get.called
+    assert mock_oauth_get.called
 
     user = User.get_by(email=email)
     assert user is not None
     assert user.email == email
 
-    with flask_client.session_transaction() as session:
-        session["oauth_state"] = None
+    with flask_client.session_transaction() as sess:
+        sess["oauth_state"] = None
 
 
+@patch("requests.get")
 @patch("requests_oauthlib.OAuth2Session.fetch_token")
 @patch("requests_oauthlib.OAuth2Session.get")
-def test_oidc_callback_login(mock_get, mock_fetch_token, flask_client):
+def test_oidc_callback_login(mock_oauth_get, mock_fetch_token, mock_get, flask_client):
     email = random_string()
-    mock_get.return_value = MockResponse(
+    mock_oauth_get.return_value = MockResponse(
         200,
         {
             "email": email,
         },
     )
-    with flask_client.session_transaction() as session:
-        session["oauth_state"] = "state"
+    config.OIDC_WELL_KNOWN_URL = "http://localhost:7777/well-known-url"
+    with flask_client.session_transaction() as sess:
+        sess["oauth_redirect_next"] = None
+        sess["oauth_state"] = "state"
+
+    mock_get.return_value.json.return_value = mock_well_known_response
 
     user = User.create(
         email=email,
@@ -275,10 +376,57 @@ def test_oidc_callback_login(mock_get, mock_fetch_token, flask_client):
     expected_redirect_url = "/dashboard/"
 
     assert expected_redirect_url == parsed.path
-    assert mock_get.called
+    assert mock_oauth_get.called
 
-    with flask_client.session_transaction() as session:
-        session["oauth_state"] = None
+    with flask_client.session_transaction() as sess:
+        sess["oauth_state"] = None
+
+
+@patch("requests.get")
+@patch("requests_oauthlib.OAuth2Session.fetch_token")
+@patch("requests_oauthlib.OAuth2Session.get")
+def test_oidc_callback_login_with_next_url(
+    mock_oauth_get, mock_fetch_token, mock_get, flask_client
+):
+    email = random_string()
+    mock_oauth_get.return_value = MockResponse(
+        200,
+        {
+            "email": email,
+        },
+    )
+    config.OIDC_WELL_KNOWN_URL = "http://localhost:7777/well-known-url"
+    with flask_client.session_transaction() as sess:
+        sess["oauth_redirect_next"] = "/dashboard/settings/"
+        sess["oauth_state"] = "state"
+
+    mock_get.return_value.json.return_value = mock_well_known_response
+
+    user = User.create(
+        email=email,
+        name="name",
+        password="",
+        activated=True,
+    )
+    user = User.get_by(email=email)
+    assert user is not None
+
+    r = flask_client.get(
+        url_for("auth.oidc_callback"),
+        follow_redirects=False,
+    )
+    location = r.headers.get("Location")
+    assert location is not None
+
+    parsed = parse_url(location)
+
+    expected_redirect_url = "/dashboard/settings/"
+
+    assert expected_redirect_url == parsed.path
+    assert mock_oauth_get.called
+
+    with flask_client.session_transaction() as sess:
+        sess["oauth_state"] = None
 
 
 def test_create_user():

tests/cron/test_get_alias_for_hibp.py

@@ -0,0 +1,168 @@
+import arrow
+import pytest
+
+import cron
+from app.db import Session
+from app.models import (
+    Alias,
+    AppleSubscription,
+    PlanEnum,
+    CoinbaseSubscription,
+    ManualSubscription,
+    Subscription,
+    PartnerUser,
+    PartnerSubscription,
+    User,
+)
+from app.proton.utils import get_proton_partner
+from tests.utils import create_new_user, random_token
+
+
+def test_get_alias_for_free_user_has_no_alias():
+    user = create_new_user()
+    alias_id = Alias.create_new_random(user).id
+    Session.commit()
+    aliases = list(
+        cron.get_alias_to_check_hibp(arrow.now(), [], alias_id, alias_id + 1)
+    )
+    assert len(aliases) == 0
+
+
+def test_get_alias_for_lifetime_with_null_hibp_date():
+    user = create_new_user()
+    user.lifetime = True
+    user.enable_data_breach_check = True
+    alias_id = Alias.create_new_random(user).id
+    Session.commit()
+    aliases = list(
+        cron.get_alias_to_check_hibp(arrow.now(), [], alias_id, alias_id + 1)
+    )
+    assert alias_id == aliases[0].id
+
+
+def test_get_alias_for_lifetime_with_old_hibp_date():
+    user = create_new_user()
+    user.lifetime = True
+    user.enable_data_breach_check = True
+    alias = Alias.create_new_random(user)
+    alias.hibp_last_check = arrow.now().shift(days=-1)
+    alias_id = alias.id
+    Session.commit()
+    aliases = list(
+        cron.get_alias_to_check_hibp(arrow.now(), [], alias_id, alias_id + 1)
+    )
+    assert alias_id == aliases[0].id
+
+
+def create_partner_sub(user: User):
+    pu = PartnerUser.create(
+        partner_id=get_proton_partner().id,
+        partner_email=user.email,
+        external_user_id=random_token(10),
+        user_id=user.id,
+        flush=True,
+    )
+    PartnerSubscription.create(
+        partner_user_id=pu.id, end_at=arrow.utcnow().shift(days=15)
+    )
+
+
+sub_generator_list = [
+    lambda u: AppleSubscription.create(
+        user_id=u.id,
+        expires_date=arrow.now().shift(days=15),
+        original_transaction_id=random_token(10),
+        receipt_data=random_token(10),
+        plan=PlanEnum.monthly,
+    ),
+    lambda u: CoinbaseSubscription.create(
+        user_id=u.id,
+        end_at=arrow.now().shift(days=15),
+    ),
+    lambda u: ManualSubscription.create(
+        user_id=u.id,
+        end_at=arrow.now().shift(days=15),
+    ),
+    lambda u: Subscription.create(
+        user_id=u.id,
+        cancel_url="",
+        update_url="",
+        subscription_id=random_token(10),
+        event_time=arrow.now(),
+        next_bill_date=arrow.now().shift(days=15).date(),
+        plan=PlanEnum.monthly,
+    ),
+    create_partner_sub,
+]
+
+
+@pytest.mark.parametrize("sub_generator", sub_generator_list)
+def test_get_alias_for_sub(sub_generator):
+    user = create_new_user()
+    user.enable_data_breach_check = True
+    sub_generator(user)
+    alias_id = Alias.create_new_random(user).id
+    Session.commit()
+    aliases = list(
+        cron.get_alias_to_check_hibp(arrow.now(), [], alias_id, alias_id + 1)
+    )
+    assert alias_id == aliases[0].id
+
+
+def test_disabled_user_is_not_checked():
+    user = create_new_user()
+    user.lifetime = True
+    user.disabled = True
+    alias_id = Alias.create_new_random(user).id
+    Session.commit()
+    aliases = list(
+        cron.get_alias_to_check_hibp(arrow.now(), [], alias_id, alias_id + 1)
+    )
+    assert len(aliases) == 0
+
+
+def test_skipped_user_is_not_checked():
+    user = create_new_user()
+    user.lifetime = True
+    alias_id = Alias.create_new_random(user).id
+    Session.commit()
+    aliases = list(
+        cron.get_alias_to_check_hibp(arrow.now(), [user.id], alias_id, alias_id + 1)
+    )
+    assert len(aliases) == 0
+
+
+def test_already_checked_is_not_checked():
+    user = create_new_user()
+    user.lifetime = True
+    alias = Alias.create_new_random(user)
+    alias.hibp_last_check = arrow.now().shift(days=1)
+    alias_id = alias.id
+    Session.commit()
+    aliases = list(
+        cron.get_alias_to_check_hibp(arrow.now(), [user.id], alias_id, alias_id + 1)
+    )
+    assert len(aliases) == 0
+
+
+def test_outed_in_user_is_checked():
+    user = create_new_user()
+    user.lifetime = True
+    user.enable_data_breach_check = True
+    alias_id = Alias.create_new_random(user).id
+    Session.commit()
+    aliases = list(
+        cron.get_alias_to_check_hibp(arrow.now(), [], alias_id, alias_id + 1)
+    )
+    assert len(aliases) == 1
+
+
+def test_outed_out_user_is_not_checked():
+    user = create_new_user()
+    user.lifetime = True
+    alias_id = Alias.create_new_random(user).id
+    Session.commit()
+    aliases = list(
+        cron.get_alias_to_check_hibp(arrow.now(), [], alias_id, alias_id + 1)
+    )
+    assert len(aliases) == 0

tests/events/test_event_dispatcher.py

@@ -0,0 +1,56 @@
+from app.events.event_dispatcher import EventDispatcher, Dispatcher
+from app.events.generated.event_pb2 import EventContent, UserDeleted
+from app.models import PartnerUser, User
+from app.proton.utils import get_proton_partner
+from tests.utils import create_new_user, random_token
+from typing import Tuple
+
+
+class OnMemoryDispatcher(Dispatcher):
+    def __init__(self):
+        self.memory = []
+
+    def send(self, event: bytes):
+        self.memory.append(event)
+
+
+def _create_unlinked_user() -> User:
+    return create_new_user()
+
+
+def _create_linked_user() -> Tuple[User, PartnerUser]:
+    user = _create_unlinked_user()
+    partner_user = PartnerUser.create(
+        partner_id=get_proton_partner().id,
+        user_id=user.id,
+        external_user_id=random_token(10),
+        flush=True,
+    )
+
+    return user, partner_user
+
+
+def test_event_dispatcher_stores_events():
+    dispatcher = OnMemoryDispatcher()
+
+    (user, partner) = _create_linked_user()
+    content = EventContent(user_deleted=UserDeleted())
+    EventDispatcher.send_event(user, content, dispatcher, skip_if_webhook_missing=False)
+    assert len(dispatcher.memory) == 1
+
+    content = EventContent(user_deleted=UserDeleted())
+    EventDispatcher.send_event(user, content, dispatcher, skip_if_webhook_missing=False)
+    assert len(dispatcher.memory) == 2
+
+
+def test_event_dispatcher_does_not_send_event_if_user_not_linked():
+    dispatcher = OnMemoryDispatcher()
+
+    user = _create_unlinked_user()
+    content = EventContent(user_deleted=UserDeleted())
+    EventDispatcher.send_event(user, content, dispatcher, skip_if_webhook_missing=False)
+    assert len(dispatcher.memory) == 0
+
+    content = EventContent(user_deleted=UserDeleted())
+    EventDispatcher.send_event(user, content, dispatcher, skip_if_webhook_missing=False)
+    assert len(dispatcher.memory) == 0

tests/tasks/test_cleanup_old_imports.py

@@ -0,0 +1,35 @@
+import tempfile
+from io import BytesIO
+
+import arrow
+
+from app import s3, config
+from app.models import File, BatchImport
+from tasks.cleanup_old_imports import cleanup_old_imports
+from tests.utils import random_token, create_new_user
+
+
+def test_cleanup_old_imports():
+    BatchImport.filter().delete()
+    with tempfile.TemporaryDirectory() as tmpdir:
+        config.UPLOAD_DIR = tmpdir
+        user = create_new_user()
+        path = random_token()
+        s3.upload_from_bytesio(path, BytesIO("data".encode("utf-8")))
+        file = File.create(path=path, commit=True)  # noqa: F821
+        now = arrow.now()
+        delete_batch_import_id = BatchImport.create(
+            user_id=user.id,
+            file_id=file.id,
+            created_at=now.shift(minutes=-1),
+            flush=True,
+        ).id
+        keep_batch_import_id = BatchImport.create(
+            user_id=user.id,
+            file_id=file.id,
+            created_at=now.shift(minutes=+1),
+            commit=True,
+        ).id
+        cleanup_old_imports(now)
+        assert BatchImport.get(id=delete_batch_import_id) is None
+        assert BatchImport.get(id=keep_batch_import_id) is not None

tests/tasks/test_cleanup_old_jobs.py

@@ -0,0 +1,72 @@
+import arrow
+
+from app import config
+from app.models import Job, JobState
+from tasks.cleanup_old_jobs import cleanup_old_jobs
+
+
+def test_cleanup_old_jobs():
+    Job.filter().delete()
+    now = arrow.now()
+    delete_ids = [
+        Job.create(
+            updated_at=now.shift(minutes=-1),
+            state=JobState.done.value,
+            name="",
+            payload="",
+            flush=True,
+        ).id,
+        Job.create(
+            updated_at=now.shift(minutes=-1),
+            state=JobState.error.value,
+            name="",
+            payload="",
+            flush=True,
+        ).id,
+        Job.create(
+            updated_at=now.shift(minutes=-1),
+            state=JobState.taken.value,
+            attempts=config.JOB_MAX_ATTEMPTS,
+            name="",
+            payload="",
+            flush=True,
+        ).id,
+    ]
+
+    keep_ids = [
+        Job.create(
+            updated_at=now.shift(minutes=+1),
+            state=JobState.done.value,
+            name="",
+            payload="",
+            flush=True,
+        ).id,
+        Job.create(
+            updated_at=now.shift(minutes=+1),
+            state=JobState.error.value,
+            name="",
+            payload="",
+            flush=True,
+        ).id,
+        Job.create(
+            updated_at=now.shift(minutes=+1),
+            state=JobState.taken.value,
+            attempts=config.JOB_MAX_ATTEMPTS,
+            name="",
+            payload="",
+            flush=True,
+        ).id,
+        Job.create(
+            updated_at=now.shift(minutes=-1),
+            state=JobState.taken.value,
+            attempts=config.JOB_MAX_ATTEMPTS - 1,
+            name="",
+            payload="",
+            flush=True,
+        ).id,
+    ]
+    cleanup_old_jobs(now)
+    for delete_id in delete_ids:
+        assert Job.get(id=delete_id) is None
+    for keep_id in keep_ids:
+        assert Job.get(id=keep_id) is not None

tests/tasks/test_cleanup_old_notifications.py

@@ -0,0 +1,26 @@
+import arrow
+
+from app.models import Notification
+from tasks.cleanup_old_notifications import cleanup_old_notifications
+from tests.utils import create_new_user
+
+
+def test_cleanup_old_notifications():
+    Notification.filter().delete()
+    user = create_new_user()
+    now = arrow.now()
+    delete_id = Notification.create(
+        user_id=user.id,
+        created_at=now.shift(minutes=-1),
+        message="",
+        flush=True,
+    ).id
+    keep_id = Notification.create(
+        user_id=user.id,
+        created_at=now.shift(minutes=+1),
+        message="",
+        flush=True,
+    ).id
+    cleanup_old_notifications(now)
+    assert Notification.get(id=delete_id) is None
+    assert Notification.get(id=keep_id) is not None

tests/test.env

@@ -51,9 +51,7 @@ FACEBOOK_CLIENT_SECRET=to_fill
 
 # Login with OIDC
 CONNECT_WITH_OIDC_ICON=fa-github
-OIDC_AUTHORIZATION_URL=to_fill
-OIDC_USER_INFO_URL=to_fill
-OIDC_TOKEN_URL=to_fill
+OIDC_WELL_KNOWN_URL=to_fill
 OIDC_SCOPES=openid email profile
 OIDC_NAME_FIELD=name
 OIDC_CLIENT_ID=to_fill

tests/test_email_handler.py

@@ -384,3 +384,30 @@ def test_break_loop_alias_as_mailbox(flask_client):
     msg[headers.SUBJECT] = random_string()
     result = email_handler.handle(envelope, msg)
     assert result == status.E525
+
+
+@mail_sender.store_emails_test_decorator
+def test_preserve_headers(flask_client):
+    headers_to_keep = [
+        headers.SUBJECT,
+        headers.DATE,
+        headers.MESSAGE_ID,
+        headers.REFERENCES,
+        headers.IN_REPLY_TO,
+        headers.SL_QUEUE_ID,
+    ] + headers.MIME_HEADERS
+    user = create_new_user()
+    alias = Alias.create_new_random(user)
+    envelope = Envelope()
+    envelope.mail_from = "somewhere@lo.cal"
+    envelope.rcpt_tos = [alias.email]
+    msg = EmailMessage()
+    for header in headers_to_keep:
+        msg[header] = header + "keep"
+    result = email_handler.handle(envelope, msg)
+    assert result == status.E200
+    sent_mails = mail_sender.get_stored_emails()
+    assert len(sent_mails) == 1
+    msg = sent_mails[0].msg
+    for header in headers_to_keep:
+        assert msg[header] == header + "keep"

tests/test_models.py

@@ -17,6 +17,7 @@ from app.models import (
     Subscription,
     PlanEnum,
     PADDLE_SUBSCRIPTION_GRACE_DAYS,
+    SyncEvent,
 )
 from tests.utils import login, create_new_user, random_token
 
@@ -325,3 +326,51 @@ def test_user_can_send_receive():
     user.disabled = False
     user.delete_on = arrow.now()
     assert not user.can_send_or_receive()
+
+
+def test_sync_event_dead_letter():
+    # remove all SyncEvents before the test
+    all_events = SyncEvent.all()
+    for event in all_events:
+        SyncEvent.delete(event.id, commit=True)
+
+    # create an expired not taken event
+    e1 = SyncEvent.create(
+        content=b"content",
+        created_at=arrow.now().shift(minutes=-15),
+        taken_time=None,
+        commit=True,
+    )
+
+    # create an expired taken event (but too long ago)
+    e2 = SyncEvent.create(
+        content=b"content",
+        created_at=arrow.now().shift(minutes=-15),
+        taken_time=arrow.now().shift(minutes=-14),
+        commit=True,
+    )
+
+    # create an expired taken event (but recently)
+    e3 = SyncEvent.create(
+        content=b"content",
+        created_at=arrow.now().shift(minutes=-15),
+        taken_time=arrow.now().shift(minutes=-1),
+        commit=True,
+    )
+
+    # create a normal event
+    e4 = SyncEvent.create(
+        content=b"content",
+        created_at=arrow.now(),
+        commit=True,
+    )
+
+    # get dead letter events
+    dead_letter_events = SyncEvent.get_dead_letter(
+        older_than=arrow.now().shift(minutes=-10)
+    )
+    assert len(dead_letter_events) == 2
+    assert e1 in dead_letter_events
+    assert e2 in dead_letter_events
+    assert e3 not in dead_letter_events
+    assert e4 not in dead_letter_events