✨ adds prioritized event support

This commit introduces support for prioritized events, allowing certain events to take precedence over others during overlap resolution.

This is achieved by:
- Introducing a `PriorityEventToken` model to manage tokens for priority events.
- Modifying the overlap resolution logic to skip overlaps if a prioritized event is involved.
- Updating email templates to include information about prioritization and overlap events.
- Adding a check for priority tokens in event descriptions.

README.md

@@ -159,17 +159,22 @@ Email templates can be configured in the Django Admin interface. Jinja2 syntax
 is used for the templates. The following variables are available in the
 templates:
 
-- `event_name` - The name of the event
-- `event_start` - The start time (datetime) of the event
-- `event_end` - The end time (datetime) of the event
-- `event_created` - The datetime the event was created
-- `event_is_deleted` - Whether the event was deleted
-- `event_is_cancelled` - Whether the event was cancelled
-- `event_is_recurring` - Whether the event is recurring
-- `event_organizer` - The organizer of the event
-- `overlap_event_name` - The name of the overlap event
-- `overlap_event_start` - The start time (datetime) of the overlap event
-- `overlap_event_end` - The end time (datetime) of the overlap event
-- `overlap_event_created` - The datetime the overlap event was created
-- `overlap_event_organizer` - The organizer of the overlap event
+- `name` - The name of the event
+- `start` - The start time (datetime) of the event
+- `end` - The end time (datetime) of the event
+- `created` - The datetime the event was created
+- `is_deleted` - Whether the event was deleted
+- `is_cancelled` - Whether the event was cancelled
+- `is_recurring` - Whether the event is recurring
+- `is_priorized` - Whether the event is prioritized
+- `is_deprioritized` - Whether the event is deprioritized in favor of another
+  event
+- `organizer` - The organizer of the event
+- `overlap_events` - A list of overlap events, each containing:
+  - `name` - The name of the overlap event
+  - `start` - The start time (datetime) of the overlap event
+  - `end` - The end time (datetime) of the overlap event
+  - `created` - The datetime the overlap event was created
+  - `organizer` - The organizer of the overlap event
+  - `is_priorized` - Whether the overlap event is prioritized
 - `calendar_name` - The name of the calendar

src/booking.py

@@ -3,20 +3,21 @@ import secrets
 from datetime import datetime
 from pathlib import Path
 from uuid import UUID
-import markdown
 
+import markdown
 import requests
 import shortuuid
-from django.views.decorators.csrf import csrf_exempt
+from django.core.signing import Signer, BadSignature
 from django.core.validators import URLValidator
 from django.db import models
 from django.shortcuts import render, get_object_or_404
 from django.utils import timezone
+from django.views.decorators.csrf import csrf_exempt
 from ics import Calendar as ICS_Calendar, Event as ICS_Event
 from nanodjango import Django
 from shortuuid.django_fields import ShortUUIDField
 
-from clear_overlaps import clear_overlaps as clear
+from clear_bookings import clear
 
 DEBUG = os.getenv("DJANGO_DEBUG", False)
 SECRET_KEY = os.getenv("DJANGO_SECRET_KEY") \
@@ -64,6 +65,7 @@ from ninja import NinjaAPI, ModelSchema
 from ninja.security import HttpBearer, django_auth
 from ninja.errors import HttpError
 
+
 @app.admin
 class EmailTemplate(models.Model):
     """
@@ -77,24 +79,29 @@ class EmailTemplate(models.Model):
                             If not set, no email will be sent.<br>
                             Jinja2 template syntax can be used in the subject and body.<br>
                             Available variables:<br>
-                            - event_name: The name of the event<br>
-                            - event_start: The start time (datetime) of the event<br>
-                            - event_end: The end time (datetime) of the event<br>
-                            - event_created: The datetime the event was created<br>
-                            - event_is_deleted: Whether the event was deleted<br>
-                            - event_is_cancelled: Whether the event was cancelled<br>
-                            - event_is_recurring: Whether the event is recurring<br>
-                            - event_organizer: The organizer of the event<br>
-                            - overlap_event_name: The name of the overlap event<br>
-                            - overlap_event_start: The start time (datetime) of the overlap event<br>
-                            - overlap_event_end: The end time (datetime) of the overlap event<br>
-                            - overlap_event_created: The datetime the overlap event was created<br>
-                            - overlap_event_organizer: The organizer of the overlap event<br>
+                            - name: The name of the event<br>
+                            - start: The start time (datetime) of the event<br>
+                            - end: The end time (datetime) of the event<br>
+                            - created: The datetime the event was created<br>
+                            - is_deleted: Whether the event was deleted<br>
+                            - is_cancelled: Whether the event was cancelled<br>
+                            - is_recurring: Whether the event is recurring<br>
+                            - organizer: The organizer of the event<br>
+                            - is_prioritized: Whether the event is prioritized<br>
+                            - is_deprioritized: Whether the event was deprioritized in favor of another event<br>
+                            - overlap_events: List of overlap events, each with:<br>
+                                - name: The name of the overlap event<br>
+                                - start: The start time (datetime) of the overlap event<br>
+                                - end: The end time (datetime) of the overlap event<br>
+                                - created: The datetime the overlap event was created<br>
+                                - organizer: The organizer of the overlap event<br>
+                                - is_prioritized: Whether the overlap event is prioritized<br>
                             - calendar_name: The name of the calendar""")
 
     def __str__(self):
         return self.name
 
+
 @app.admin
 class Calendar(models.Model):
     """
@@ -227,6 +234,95 @@ class Event(models.Model):
         return string if not self.cancelled else f"{string} - CANCELLED"
 
 
+@app.admin(
+    list_display=("token", "is_used", "created_at", "updated_at", "notes"),
+    list_filter=("is_used",),
+    read_only_fields=("created_at", "token", "signature"))
+class PriorityEventToken(models.Model):
+    """
+    Priority event token model to store tokens for priority events.
+    """
+    id = models.AutoField(primary_key=True)
+    token = models.CharField(max_length=14, unique=True, editable=False)
+    signature = models.CharField(max_length=80, blank=True, editable=False)
+    notes = models.TextField(blank=True)
+    is_used = models.BooleanField(default=False)
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    @classmethod
+    def generate_token(cls):
+        return f"#{secrets.token_hex(6).upper()}#"
+
+    def save(self, *args, **kwargs):
+        if not self.token:
+            self.token = self.generate_token()
+        return super().save(*args, **kwargs)
+
+    def redeem(self, uuid: str) -> str | bool:
+        """
+        Use the token to prioritize the event.
+        :return: Returns the signature or False if the token or the uuid is not
+        valid.
+        """
+        # Check for a valid uuid
+        try:
+            uuid = UUID(uuid, version=4)
+        except ValueError:
+            print(f"Failed to decode UUID {uuid}")
+            return False
+
+        if not self.is_used:
+            self.signature = self._sign(uuid)
+            self.is_used = True
+            self.save()
+            return True
+        return False
+
+    def validate_signature(self, uuid: str) -> bool:
+        """
+        Validate the signature of the uuid.
+        :param uuid: The uuid4 of the priority event.
+        :return:
+        """
+        try:
+            uuid = UUID(uuid, version=4)
+        except ValueError:
+            print(f"Failed to decode UUID {uuid}")
+            return False
+
+        if not self.signature:
+            print(f"No signature found for token '{self.token}'")
+            return False
+
+        return self._validate(uuid, self.signature)
+
+    @staticmethod
+    def _sign(uuid: UUID) -> str:
+        """
+        Generate a signed uuid.
+        :return: The signature.
+        """
+        signer = Signer()
+        return signer.sign(uuid.__str__())
+
+    @staticmethod
+    def _validate(uuid: UUID, signature: str) -> bool:
+        """
+        Validate the signature of the uuid.
+        :return: True if the signature matches the uuid, False otherwise.
+        """
+        signer = Signer()
+        try:
+            return signer.unsign(signature) == uuid.__str__()
+        except BadSignature as e:
+            print(e)
+            return False
+
+    def __str__(self):
+        return self.token
+
+
 @app.admin(readonly_fields=('key',))
 class APIKey(models.Model):
     id = models.AutoField(primary_key=True)
@@ -341,7 +437,9 @@ def delete_event(request, calendar: str, event_id: str):
     event.cancel()
     return 204, None
 
-@api.delete("/clear-bookings", response={200: dict, 204: None, 401: None, 404: None})
+
+@api.delete("/clear-bookings",
+            response={200: dict, 204: None, 401: None, 404: None})
 @csrf_exempt
 def clear_bookings(request, calendar: str = None, test: bool = False):
     user = get_user(request)
@@ -370,8 +468,10 @@ def clear_bookings(request, calendar: str = None, test: bool = False):
     else:
         return 200, result
 
+
 app.route("api/", include=api.urls)
 
+
 @app.route("/")
 @csrf_exempt
 def home(request):

src/clear_bookings.py

@@ -1,9 +1,11 @@
 import os
+import re
 import smtplib
 import ssl
 from datetime import datetime, date, timedelta
 from email.mime.multipart import MIMEMultipart
 from email.mime.text import MIMEText
+from email.utils import format_datetime
 from typing import NamedTuple
 import pytz
 from pprint import pprint
@@ -23,11 +25,14 @@ DavEvent = NamedTuple("DavEvent", [
     ("status", str),
     ("organizer", str),
     ("obj", caldav.Event),
+    ("is_cancelled", bool),
+    ("is_recurring", bool),
+    ("is_prioritized", bool),
 ])
 
-def clear_overlaps(target_calendars: list, is_test: bool=False) -> dict:
+def clear(target_calendars: list, is_test: bool=False) -> dict:
     """
-    Clear overlapping events in calendars.
+    Clear overlapping and cancelled events in calendars.
     :param target_calendars: List of calendars to check for overlaps.
     :param is_test: Do not delete events, just print what would be deleted.
     :return: Dictionary with results of the operation.
@@ -71,7 +76,6 @@ def clear_overlaps(target_calendars: list, is_test: bool=False) -> dict:
             end=date.today() + timedelta(days=horizon),
             event=True,
             expand=True,
-            #split_expanded=False,
         )
 
         events = []
@@ -81,7 +85,7 @@ def clear_overlaps(target_calendars: list, is_test: bool=False) -> dict:
                 # Delete cancelled non-recurring events if not in test mode
                 if (component.name == "VEVENT"
                         and is_cancelled_event(event)
-                        and not is_recurring_event(event)):
+                        and not event.is_recurring):
 
                     if not is_test:
                         event.delete()
@@ -129,6 +133,9 @@ def clear_overlaps(target_calendars: list, is_test: bool=False) -> dict:
                             status=component.get("status", "CONFIRMED"),
                             organizer=component.get("organizer", "").replace("mailto:", "").strip(),
                             obj=event,
+                            is_cancelled=is_cancelled_event(event),
+                            is_recurring=is_recurring_event(event),
+                            is_prioritized=is_prioritized_event(event),
                         )
                     )
 
@@ -140,7 +147,8 @@ def clear_overlaps(target_calendars: list, is_test: bool=False) -> dict:
             event = overlap["event"]
             overlaps_with = overlap["overlaps_with"]
             is_deleted = False
-            is_canceled = False
+            is_cancelled = False
+            is_deprioritized = any(ov.is_prioritized for ov in overlaps_with)
             result = {
                 "event": {
                     "uid": event.uid,
@@ -149,51 +157,69 @@ def clear_overlaps(target_calendars: list, is_test: bool=False) -> dict:
                     "end": event.end,
                     "created": event.created,
                     "organizer": event.organizer,
+                    "is_recurring": event.is_recurring,
+                    "is_prioritized": event.is_prioritized,
+                    "is_deprioritized": is_deprioritized,
+                    "cancellation_type": "deleted" if is_deleted else "cancelled",
                 },
-                "overlaps_with": {
-                    "uid": overlaps_with.uid,
-                    "name": overlaps_with.name,
-                    "start": overlaps_with.start,
-                    "end": overlaps_with.end,
-                    "created": overlaps_with.created,
-                    "organizer": overlaps_with.organizer,
-                },
+                "overlaps_with": [{
+                    "uid": ov.uid,
+                    "name": ov.name,
+                    "start": ov.start,
+                    "end": ov.end,
+                    "created": ov.created,
+                    "organizer": ov.organizer,
+                    "is_recurring": ov.is_recurring,
+                    "is_prioritized": ov.is_prioritized,
+                } for ov in overlaps_with],
                 "calendar": calendar.id,
             }
             try:
                 # If this is not a recurring event, we can delete it directly
-                if not is_recurring_event(event.obj):
+                if not event.is_recurring:
                     # but only if we are not in test mode
                     if not is_test:
                         event.obj.delete()
                     is_deleted = True
                     results["deleted_overlapping_events"].append(result)
                     print("Deleted overlapping event:")
-                    pprint(result)
-                    print("------")
 
-                # If this is a recurring event, and not already canceled,
+                # If this is a recurring event, and not already cancelled,
                 # we need to cancel it now
-                elif not is_cancelled_event(event.obj):
+                elif not event.is_cancelled:
                     if not is_test:
                         event.obj.decline_invite()
-                    is_canceled = True
+                    is_cancelled = True
                     results["cancelled_overlapping_recurring_events"].append(result)
                     print("Cancelled overlapping recurring event:")
-                    pprint(result)
-                    print("------")
+
 
                 # Send email to organizer of the event if not in test mode
                 email_template = tcal_by_name[calendar.id].email_template
                 if email_template and not is_test:
                     try:
                         send_mail_to_organizer(event, overlaps_with, calendar,
-                                               is_deleted, is_canceled,
-                                               email_template)
+                                               is_deleted, is_cancelled,
+                                               is_deprioritized, email_template)
+                        result["email_sent"] = True
                     except Exception as e:
                         print("Failed to send email to organizer for event "
                               f"{event.name}: {e}")
-                        continue
+                        result["email_sent"] = False
+                elif email_template and is_test:
+                    print("Email template found, but not sending email in test mode.")
+                    send_mail_to_organizer(event, overlaps_with, calendar,
+                                           is_deleted, is_cancelled,
+                                           is_deprioritized, email_template,
+                                           is_test=True)
+                    result["email_sent"] = True
+                else:
+                    result["email_sent"] = False
+
+                # Print results
+                pprint(result)
+                print("------")
+
             except Exception as e:
                 print(f"Failed to delete event {event.uid}: {e}")
                 print("------")
@@ -211,7 +237,6 @@ def find_overlapping_events(events: list[DavEvent]) -> dict:
                 as values.
     """
     overlapping_events = {}
-    checked_events = {}
 
     # Order events by created time
     events = sorted(events, key=lambda item: item.created)
@@ -229,25 +254,40 @@ def find_overlapping_events(events: list[DavEvent]) -> dict:
             continue
 
         for compare_event in events:
-            # Skip if the compare_events is:
-            # 1. The same event or belongs to the same series as the compare event
-            # 2. Already checked
-            # 3. Already in the overlapping events dictionary
-            if event.uid == compare_event.uid \
-                    or checked_events.get(create_event_identifier(compare_event)) \
-                    or overlapping_events.get(create_event_identifier(compare_event)):
+            # Skip if the compare_event is same event or belongs to the same
+            # series as the compare event
+            if event.uid == compare_event.uid:
                 continue
 
             # Check if the events overlap
             if event_starts_later(event, compare_event) or \
                     event_starts_earlier(event, compare_event) or \
                     event_inbetween(event, compare_event):
+
+                # If both events are prioritized, skip the overlap
+                if compare_event.is_prioritized and event.is_prioritized:
+                    print(f"Skipping overlap between prioritized events: "
+                          f"'{event.name}' and '{compare_event.name}'")
+                    continue
+
+                # If the compare_event is prioritized and the event is not,
+                # skip the overlap
+                elif compare_event.is_prioritized and not event.is_prioritized:
+                    print(f"Skipping overlap between event '{event.name}' "
+                          f"and prioritized event '{compare_event.name}'")
+                    continue
+
                 # Add to overlapping events dictionary
-                overlapping_events.update({
-                    create_event_identifier(compare_event): {"event": compare_event,
-                                        "overlaps_with": event}})
-                # Add to checked events dictionary
-                checked_events.update({create_event_identifier(event): event})
+                event_identifier = create_event_identifier(compare_event)
+                if e := overlapping_events.get(event_identifier):
+                    # If the event is already in the dictionary, extend the overlaps
+                    e["overlaps_with"].append(event)
+                else:
+                    # Create a new entry for the overlapping event
+                    overlapping_events[event_identifier] = {
+                        "event": compare_event,
+                        "overlaps_with": [event]
+                    }
 
     return overlapping_events
 
@@ -277,22 +317,74 @@ def is_cancelled_event(event: CalendarObjectResource) -> bool:
     """
     return event.icalendar_component.get("status") == "CANCELLED"
 
+def is_prioritized_event(event: CalendarObjectResource) -> bool:
+    """
+    Check if the event is a prioritized event by finding and validating the
+    priority token.
+    :param event:
+    :return:
+    """
+    from booking import PriorityEventToken
+    description = event.icalendar_component.get("DESCRIPTION", "")
+    uid = event.icalendar_component.get("uid")
+
+    # Check if there is a token in the event description
+    token_pattern = r"\#[A-Z1-9]{12}\#"
+    match = re.search(token_pattern, description)
+    if match:
+        token = match.group()
+        print(f"Priority token found in event description: {token}")
+        token_obj = PriorityEventToken.objects.get(token=token)
+
+        # Check if the token object exists in the database
+        if not token_obj:
+            print(f"Priority token '{token}' not found in database.")
+            return False
+
+        # If token is already used, verify signature
+        if token_obj.is_used:
+            # Check if the signature is valid
+
+            if token_obj.validate_signature(uid):
+                print(f"Priority token '{token}' is valid.")
+                return True
+            else:
+                print(f"Priority token '{token}' is invalid.")
+                # TODO: Notify about invalid token usage
+                return False
+
+        # If the token hasn't been used yet, redeem  it
+        else:
+            print(f"Redeeming priority token '{token}' for event '{uid}'.")
+            token_obj.redeem(uid)
+            # TODO: Notify about token redemption
+            return True
+
+    # If no token is found, return False
+    return False
+
+
 def send_mail_to_organizer(
         event: DavEvent,
-        overlap_event: DavEvent,
+        overlap_events: list[DavEvent],
         calendar: caldav.Calendar,
         is_deleted: bool,
-        is_canceled: bool,
+        is_cancelled: bool,
+        is_deprioritized: bool,
         email_template,
+        is_test: bool=False
 ):
     """
     Send email to organizer of the event.
     :param event: Event that was declined
-    :param overlap_event: Event that overlaps with the declined event
+    :param overlap_events: List of events which overlap with the declined event
     :param calendar: Calendar to send the email from
     :param is_deleted: True if the event was deleted, False otherwise
-    :param is_canceled: True if the event was canceled, False otherwise
+    :param is_cancelled: True if the event was cancelled, False otherwise
+    :param is_deprioritized: True if the event was deprioritized in favor of
+    another event, False otherwise
     :param email_template: Email template to use for the email
+    :param is_test: If True, do not send the email, just print it
     """
     # Check if environment variables for SMTP are set
     if not all([
@@ -306,19 +398,24 @@ def send_mail_to_organizer(
 
     # Prepare the email content
     context = {
-        "event_name": event.name,
-        "event_start": event.start,
-        "event_end": event.end,
-        "event_created": event.created,
-        "event_is_deleted": is_deleted,
-        "event_is_canceled": is_canceled,
-        "event_is_recurring": is_recurring_event(event.obj),
-        "event_organizer": event.organizer,
-        "overlap_event_name": overlap_event.name,
-        "overlap_event_start": overlap_event.start,
-        "overlap_event_end": overlap_event.end,
-        "overlap_event_created": overlap_event.created,
-        "overlap_event_organizer": overlap_event.organizer,
+        "name": event.name,
+        "start": event.start,
+        "end": event.end,
+        "created": event.created,
+        "is_deleted": is_deleted,
+        "is_cancelled": is_cancelled,
+        "is_recurring": is_recurring_event(event.obj),
+        "organizer": event.organizer,
+        "is_prioritized": event.is_prioritized,
+        "is_deprioritized": is_deprioritized,
+        "overlap_events": [{
+            "name": overlap_event.name,
+            "start": overlap_event.start,
+            "end": overlap_event.end,
+            "created": overlap_event.created,
+            "organizer": overlap_event.organizer,
+            "is_prioritized": overlap_event.is_prioritized,
+        } for overlap_event in overlap_events],
         "calendar_name": calendar.get_display_name(),
     }
 
@@ -331,7 +428,7 @@ def send_mail_to_organizer(
     if bcc := os.getenv("SMTP_BCC"):
         message["Bcc"] = bcc
         recipients += bcc.split(",")
-    message["Date"] = datetime.now().astimezone(tz).strftime( "%d/%m/%Y %H:%M")
+    message["Date"] = format_datetime(datetime.now().astimezone(tz))
 
     # Try to render subject and body from the email template
     message["Subject"] = Template(email_template.subject).render(**context)
@@ -342,17 +439,22 @@ def send_mail_to_organizer(
     ssl_context = ssl.create_default_context()
 
     # Send the email with starttls or SSL based on environment variable
-    print(f"Sending email to {', '.join(recipients)} about event '{event.name}' "
-          f"overlap with '{overlap_event.name}'.")
+    overlaps = ", ".join([f"'{overlap.name}'" for overlap in overlap_events])
+    print(f"Sending email to {', '.join(recipients)} with subject: {message['Subject']}:")
+    print('"""')
+    print(body)
+    print('"""')
     if os.getenv('SMTP_STARTTLS', False):
         print("Using STARTTLS for SMTP connection.")
+        if not is_test:
             with smtplib.SMTP(os.getenv('SMTP_SERVER'),
                               os.getenv('SMTP_PORT', 587)) as server:
                 server.starttls(context=ssl_context)
-            server.login(os.getenv("SMTP_USER_NAME", os.getenv("SMTP_EMAIL")), os.getenv("SMTP_PASSWORD"))
+                server.login(os.getenv(" ", os.getenv("SMTP_EMAIL")), os.getenv("SMTP_PASSWORD"))
                 server.sendmail(os.getenv("SMTP_EMAIL"), recipients, message.as_string())
     else:
         print("Using SSL for SMTP connection.")
+        if not is_test:
             with smtplib.SMTP_SSL("mail.extrasolar.space",
                                   os.getenv('SMTP_PORT', 465),
                                   context=ssl_context) as server:

src/migrations/0010_priorityeventtoken_alter_emailtemplate_body.py

@@ -0,0 +1,32 @@
+# Generated by Django 5.1.4 on 2025-07-11 16:46
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("booking", "0009_alter_emailtemplate_body"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="PriorityEventToken",
+            fields=[
+                ("id", models.AutoField(primary_key=True, serialize=False)),
+                ("token", models.CharField(editable=False, max_length=14, unique=True)),
+                ("signature", models.CharField(blank=True, max_length=80)),
+                ("notes", models.TextField(blank=True)),
+                ("is_used", models.BooleanField(default=False)),
+                ("created_at", models.DateTimeField(auto_now_add=True)),
+                ("updated_at", models.DateTimeField(auto_now=True)),
+            ],
+        ),
+        migrations.AlterField(
+            model_name="emailtemplate",
+            name="body",
+            field=models.TextField(
+                help_text="                            Email template to use for sending notifications about deleted events.<br>\n                            If not set, no email will be sent.<br>\n                            Jinja2 template syntax can be used in the subject and body.<br>\n                            Available variables:<br>\n                            - name: The name of the event<br>\n                            - start: The start time (datetime) of the event<br>\n                            - end: The end time (datetime) of the event<br>\n                            - created: The datetime the event was created<br>\n                            - is_deleted: Whether the event was deleted<br>\n                            - is_cancelled: Whether the event was cancelled<br>\n                            - is_recurring: Whether the event is recurring<br>\n                            - organizer: The organizer of the event<br>\n                            - is_prioritized: Whether the event is prioritized<br>\n                            - overlap_events: List of overlap events, each with:<br>\n                                - name: The name of the overlap event<br>\n                                - start: The start time (datetime) of the overlap event<br>\n                                - end: The end time (datetime) of the overlap event<br>\n                                - created: The datetime the overlap event was created<br>\n                                - organizer: The organizer of the overlap event<br>\n                                - is_prioritized: Whether the overlap event is prioritized<br>\n                            - calendar_name: The name of the calendar"
+            ),
+        ),
+    ]

src/migrations/0011_alter_emailtemplate_body_and_more.py

@@ -0,0 +1,25 @@
+# Generated by Django 5.1.4 on 2025-07-14 09:09
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("booking", "0010_priorityeventtoken_alter_emailtemplate_body"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="emailtemplate",
+            name="body",
+            field=models.TextField(
+                help_text="                            Email template to use for sending notifications about deleted events.<br>\n                            If not set, no email will be sent.<br>\n                            Jinja2 template syntax can be used in the subject and body.<br>\n                            Available variables:<br>\n                            - name: The name of the event<br>\n                            - start: The start time (datetime) of the event<br>\n                            - end: The end time (datetime) of the event<br>\n                            - created: The datetime the event was created<br>\n                            - is_deleted: Whether the event was deleted<br>\n                            - is_cancelled: Whether the event was cancelled<br>\n                            - is_recurring: Whether the event is recurring<br>\n                            - organizer: The organizer of the event<br>\n                            - is_prioritized: Whether the event is prioritized<br>\n                            - is_deprioritized: Whether the event was deprioritized in favor of another event<br>\n                            - overlap_events: List of overlap events, each with:<br>\n                                - name: The name of the overlap event<br>\n                                - start: The start time (datetime) of the overlap event<br>\n                                - end: The end time (datetime) of the overlap event<br>\n                                - created: The datetime the overlap event was created<br>\n                                - organizer: The organizer of the overlap event<br>\n                                - is_prioritized: Whether the overlap event is prioritized<br>\n                            - calendar_name: The name of the calendar"
+            ),
+        ),
+        migrations.AlterField(
+            model_name="priorityeventtoken",
+            name="signature",
+            field=models.CharField(blank=True, editable=False, max_length=80),
+        ),
+    ]