From 062c0d3d098c5e7da370e34094bdb8fff598f225 Mon Sep 17 00:00:00 2001
From: Bruno Bernardino <me@brunobernardino.com>
Date: Mon, 18 Mar 2024 19:18:29 +0000
Subject: [PATCH] Add CalDav routes and methods, with mock data

---
 fresh.gen.ts                                  |   8 +
 islands/calendar/MainCalendar.tsx             |  42 ++-
 lib/data/calendar.ts                          | 250 ++++++++++++++++++
 lib/types.ts                                  |  23 +-
 lib/utils.ts                                  | 113 +++++++-
 routes/.well-known/caldav.tsx                 |   7 +
 routes/calendar.tsx                           | 100 +------
 routes/dav/calendars.tsx                      | 133 ++++++++++
 routes/dav/calendars/[calendarId].tsx         | 209 +++++++++++++++
 .../[calendarId]/[calendarEventId].ics.tsx    | 229 ++++++++++++++++
 routes/dav/principals.tsx                     |   9 +
 11 files changed, 1008 insertions(+), 115 deletions(-)
 create mode 100644 lib/data/calendar.ts
 create mode 100644 routes/.well-known/caldav.tsx
 create mode 100644 routes/dav/calendars.tsx
 create mode 100644 routes/dav/calendars/[calendarId].tsx
 create mode 100644 routes/dav/calendars/[calendarId]/[calendarEventId].ics.tsx

diff --git a/fresh.gen.ts b/fresh.gen.ts
index b07b214..03ce848 100644
--- a/fresh.gen.ts
+++ b/fresh.gen.ts
@@ -2,6 +2,7 @@
 // This file SHOULD be checked into source version control.
 // This file is automatically updated during development when running `dev.ts`.
 
+import * as $_well_known_caldav from './routes/.well-known/caldav.tsx';
 import * as $_well_known_carddav from './routes/.well-known/carddav.tsx';
 import * as $_404 from './routes/_404.tsx';
 import * as $_app from './routes/_app.tsx';
@@ -24,6 +25,9 @@ import * as $dashboard from './routes/dashboard.tsx';
 import * as $dav_addressbooks from './routes/dav/addressbooks.tsx';
 import * as $dav_addressbooks_contacts from './routes/dav/addressbooks/contacts.tsx';
 import * as $dav_addressbooks_contacts_contactId_vcf from './routes/dav/addressbooks/contacts/[contactId].vcf.tsx';
+import * as $dav_calendars from './routes/dav/calendars.tsx';
+import * as $dav_calendars_calendarId_ from './routes/dav/calendars/[calendarId].tsx';
+import * as $dav_calendars_calendarId_calendarEventId_ics from './routes/dav/calendars/[calendarId]/[calendarEventId].ics.tsx';
 import * as $dav_files from './routes/dav/files.tsx';
 import * as $dav_index from './routes/dav/index.tsx';
 import * as $dav_principals from './routes/dav/principals.tsx';
@@ -47,6 +51,7 @@ import { type Manifest } from '$fresh/server.ts';
 
 const manifest = {
   routes: {
+    './routes/.well-known/caldav.tsx': $_well_known_caldav,
     './routes/.well-known/carddav.tsx': $_well_known_carddav,
     './routes/_404.tsx': $_404,
     './routes/_app.tsx': $_app,
@@ -69,6 +74,9 @@ const manifest = {
     './routes/dav/addressbooks.tsx': $dav_addressbooks,
     './routes/dav/addressbooks/contacts.tsx': $dav_addressbooks_contacts,
     './routes/dav/addressbooks/contacts/[contactId].vcf.tsx': $dav_addressbooks_contacts_contactId_vcf,
+    './routes/dav/calendars.tsx': $dav_calendars,
+    './routes/dav/calendars/[calendarId].tsx': $dav_calendars_calendarId_,
+    './routes/dav/calendars/[calendarId]/[calendarEventId].ics.tsx': $dav_calendars_calendarId_calendarEventId_ics,
     './routes/dav/files.tsx': $dav_files,
     './routes/dav/index.tsx': $dav_index,
     './routes/dav/principals.tsx': $dav_principals,
diff --git a/islands/calendar/MainCalendar.tsx b/islands/calendar/MainCalendar.tsx
index d2fe200..769b31e 100644
--- a/islands/calendar/MainCalendar.tsx
+++ b/islands/calendar/MainCalendar.tsx
@@ -757,13 +757,14 @@ export default function MainCalendar({ initialCalendars, initialCalendarEvents,
 
                   const isFirstDay = dayIndex === 0;
                   const isLastDay = dayIndex === 6;
+                  const isToday = new Date(day.date).toISOString().substring(0, 10) === today;
 
                   return (
                     <>
                       <section
-                        class={`flex justify-center bg-gray-900 py-2 ${isFirstDay ? 'rounded-tl-md' : ''} ${
-                          isLastDay ? 'rounded-tr-md' : ''
-                        } text-center text-xs font-semibold text-white`}
+                        class={`flex justify-center ${isToday ? 'bg-[#51A4FB]' : 'bg-gray-900'} py-2 ${
+                          isFirstDay ? 'rounded-tl-md' : ''
+                        } ${isLastDay ? 'rounded-tr-md' : ''} text-center text-xs font-semibold text-white`}
                       >
                         <span>{weekDayFormat.format(day.date)}</span>
                       </section>
@@ -1083,9 +1084,9 @@ export default function MainCalendar({ initialCalendars, initialCalendarEvents,
       <section
         class={`fixed ${
           openEvent.value ? 'block' : 'hidden'
-        } z-50 top-1/2 left-1/2 -translate-x-1/2 -translate-y-1/2 w-96 bg-slate-600 text-white rounded-md px-8 py-6 space-y-5 drop-shadow-lg`}
+        } z-50 top-1/2 left-1/2 -translate-x-1/2 -translate-y-1/2 w-96 bg-slate-600 text-white rounded-md px-8 py-6 drop-shadow-lg`}
       >
-        <h1 class='text-2xl font-semibold'>{openEvent.value?.title || ''}</h1>
+        <h1 class='text-2xl font-semibold my-5'>{openEvent.value?.title || ''}</h1>
         <header class='py-5 border-t border-b border-slate-500 font-semibold flex justify-between'>
           <span>
             {openEvent.value?.start_date ? allDayEventDateFormat.format(new Date(openEvent.value.start_date)) : ''}
@@ -1097,15 +1098,40 @@ export default function MainCalendar({ initialCalendars, initialCalendarEvents,
             </span>
           )}
         </header>
+        <section class='py-5 my-0 border-b border-slate-500'>
+          <p>TODO: calendar, recurrence</p>
+        </section>
         {openEvent.value?.extra.description
           ? (
-            <section class='py-5 border-b border-slate-500'>
+            <section class='py-5 my-0 border-b border-slate-500'>
               <p>{openEvent.value.extra.description}</p>
             </section>
           )
           : null}
-        <section class='py-5 border-b border-slate-500'>
-          <p>TODO: location, calendar, recurrence, reminders</p>
+        {openEvent.value?.extra.url
+          ? (
+            <section class='py-5 my-0 border-b border-slate-500'>
+              <a href={openEvent.value.extra.url} target='_blank' rel='noopener noreferrer'>
+                {openEvent.value.extra.url}
+              </a>
+            </section>
+          )
+          : null}
+        {openEvent.value?.extra.location
+          ? (
+            <section class='py-5 my-0 border-b border-slate-500'>
+              <a
+                href={`https://maps.google.com/maps?q=${encodeURIComponent(openEvent.value.extra.location)}`}
+                target='_blank'
+                rel='noopener noreferrer'
+              >
+                {openEvent.value.extra.location}
+              </a>
+            </section>
+          )
+          : null}
+        <section class='py-5 my-0 border-b border-slate-500'>
+          <p>TODO: reminders</p>
         </section>
         <footer class='flex justify-between'>
           <button
diff --git a/lib/data/calendar.ts b/lib/data/calendar.ts
new file mode 100644
index 0000000..9f0228f
--- /dev/null
+++ b/lib/data/calendar.ts
@@ -0,0 +1,250 @@
+// import Database, { sql } from '/lib/interfaces/database.ts';
+import { Calendar, CalendarEvent } from '/lib/types.ts';
+
+// const db = new Database();
+
+// TODO: Build this
+export async function getCalendars(userId: string): Promise<Calendar[]> {
+  // TODO: Remove this
+  await new Promise((resolve) => setTimeout(() => resolve(true), 1));
+
+  return [
+    {
+      id: 'family-1',
+      user_id: userId,
+      name: 'Family',
+      color: 'bg-purple-500',
+      is_visible: true,
+      revision: 'fake-rev',
+      extra: {
+        default_transparency: 'opaque',
+      },
+      updated_at: new Date(),
+      created_at: new Date(),
+    },
+    {
+      id: 'personal-1',
+      user_id: userId,
+      name: 'Personal',
+      color: 'bg-sky-600',
+      is_visible: true,
+      revision: 'fake-rev',
+      extra: {
+        default_transparency: 'opaque',
+      },
+      updated_at: new Date(),
+      created_at: new Date(),
+    },
+    {
+      id: 'house-chores-1',
+      user_id: userId,
+      name: 'House Chores',
+      color: 'bg-red-700',
+      is_visible: true,
+      revision: 'fake-rev',
+      extra: {
+        default_transparency: 'opaque',
+      },
+      updated_at: new Date(),
+      created_at: new Date(),
+    },
+  ];
+}
+
+// TODO: Build this
+export async function getCalendarEvents(userId: string, calendarIds: string[]): Promise<CalendarEvent[]> {
+  // TODO: Remove this
+  await new Promise((resolve) => setTimeout(() => resolve(true), 1));
+
+  const now = new Date();
+  const today = now.toISOString().substring(0, 10);
+  const tomorrow = new Date(new Date(now).setDate(now.getDate() + 1)).toISOString().substring(0, 10);
+  const twoDaysFromNow = new Date(new Date(now).setDate(now.getDate() + 2)).toISOString().substring(0, 10);
+
+  const calendarEvents = [
+    {
+      id: 'event-1',
+      user_id: userId,
+      calendar_id: 'family-1',
+      revision: 'fake-rev',
+      title: 'Dentist',
+      start_date: new Date(`${today}T14:00:00.000Z`),
+      end_date: new Date(`${today}T15:00:00.000Z`),
+      is_all_day: false,
+      status: 'scheduled',
+      extra: {
+        organizer_email: 'user@example.com',
+        transparency: 'default',
+      },
+      updated_at: new Date(),
+      created_at: new Date(),
+    },
+    {
+      id: 'event-2',
+      user_id: userId,
+      calendar_id: 'family-1',
+      revision: 'fake-rev',
+      title: 'Dermatologist',
+      start_date: new Date(`${today}T16:30:00.000Z`),
+      end_date: new Date(`${today}T17:30:00.000Z`),
+      is_all_day: false,
+      status: 'scheduled',
+      extra: {
+        organizer_email: 'user@example.com',
+        transparency: 'default',
+      },
+      updated_at: new Date(),
+      created_at: new Date(),
+    },
+    {
+      id: 'event-3',
+      user_id: userId,
+      calendar_id: 'house-chores-1',
+      revision: 'fake-rev',
+      title: 'Vacuum',
+      start_date: new Date(`${tomorrow}T15:00:00.000Z`),
+      end_date: new Date(`${tomorrow}T16:00:00.000Z`),
+      is_all_day: false,
+      status: 'scheduled',
+      extra: {
+        organizer_email: 'user@example.com',
+        transparency: 'default',
+      },
+      updated_at: new Date(),
+      created_at: new Date(),
+    },
+    {
+      id: 'event-4',
+      user_id: userId,
+      calendar_id: 'personal-1',
+      revision: 'fake-rev',
+      title: 'Schedule server updates',
+      start_date: new Date(`${twoDaysFromNow}T09:00:00.000Z`),
+      end_date: new Date(`${twoDaysFromNow}T21:00:00.000Z`),
+      is_all_day: true,
+      status: 'scheduled',
+      extra: {
+        organizer_email: 'user@example.com',
+        transparency: 'default',
+      },
+      updated_at: new Date(),
+      created_at: new Date(),
+    },
+  ] as const;
+
+  return calendarEvents.filter((calendarEvent) => calendarIds.includes(calendarEvent.calendar_id));
+}
+
+// TODO: Build this
+export async function getCalendarEvent(id: string, calendarId: string, userId: string): Promise<CalendarEvent> {
+  // TODO: Build this
+  // const calendarEvents = await db.query<CalendarEvent>(
+  //   sql`SELECT * FROM "bewcloud_calendar_events" WHERE "id" = $1 AND "calendar_id" = $2 AND "user_id" = $3 LIMIT 1`,
+  //   [
+  //     id,
+  //     calendarId,
+  //     userId,
+  //   ],
+  // );
+
+  // return calendarEvents[0];
+  const calendarEvents = await getCalendarEvents(userId, [calendarId]);
+
+  return calendarEvents.find((calendarEvent) => calendarEvent.id === id)!;
+}
+
+export async function getCalendar(id: string, userId: string) {
+  // TODO: Build this
+  // const calendars = await db.query<Calendar>(
+  //   sql`SELECT * FROM "bewcloud_calendars" WHERE "id" = $1 AND "user_id" = $2 LIMIT 1`,
+  //   [
+  //     id,
+  //     userId,
+  //   ],
+  // );
+
+  // return calendars[0];
+
+  const calendars = await getCalendars(userId);
+
+  return calendars.find((calendar) => calendar.id === id)!;
+}
+
+export async function createCalendar(userId: string, name: string, color?: string) {
+  const extra: Calendar['extra'] = {
+    default_transparency: 'opaque',
+  };
+
+  const revision = crypto.randomUUID();
+
+  // TODO: Build this
+  // const newCalendar = (await db.query<Calendar>(
+  //   sql`INSERT INTO "bewcloud_calendars" (
+  //     "user_id",
+  //     "revision",
+  //     "name",
+  //     "color",
+  //     "extra"
+  //   ) VALUES ($1, $2, $3, $4, $5)
+  //   RETURNING *`,
+  //   [
+  //     userId,
+  //     revision,
+  //     name,
+  //     color,
+  //     JSON.stringify(extra),
+  //   ],
+  // ))[0];
+
+  // TODO: Generate new, non-existing color
+  const newColor = color || 'bg-green-600';
+
+  const calendars = await getCalendars(userId);
+  const newCalendar = { ...calendars[0], id: crypto.randomUUID(), revision, extra, name, color: newColor };
+
+  return newCalendar;
+}
+
+export async function updateCalendar(calendar: Calendar) {
+  const revision = crypto.randomUUID();
+
+  // TODO: Build this
+  // await db.query(
+  //   sql`UPDATE "bewcloud_calendars" SET
+  //       "revision" = $3,
+  //       "name" = $4,
+  //       "color" = $5,
+  //       "extra" = $6,
+  //       "updated_at" = now()
+  //     WHERE "id" = $1 AND "revision" = $2`,
+  //   [
+  //     calendar.id,
+  //     calendar.revision,
+  //     revision,
+  //     calendar.name,
+  //     calendar.color,
+  //     JSON.stringify(calendar.extra),
+  //   ],
+  // );
+
+  calendar.revision = revision;
+
+  // TODO: Remove this
+  await new Promise((resolve) => setTimeout(() => resolve(true), 1));
+}
+
+export async function deleteCalendar(_id: string, _userId: string) {
+  // TODO: Build this
+  // await db.query(
+  //   sql`DELETE FROM "bewcloud_calendars" WHERE "id" = $1 AND "user_id" = $2`,
+  //   [
+  //     id,
+  //     userId,
+  //   ],
+  // );
+
+  // TODO: Remove this
+  await new Promise((resolve) => setTimeout(() => resolve(true), 1));
+}
+
+// TODO: When creating, updating, or deleting events, also update the calendar's revision
diff --git a/lib/types.ts b/lib/types.ts
index 5df48cc..65a30d8 100644
--- a/lib/types.ts
+++ b/lib/types.ts
@@ -141,7 +141,8 @@ export interface Calendar {
   extra: {
     shared_read_user_ids?: string[];
     shared_write_user_ids?: string[];
-    default_visibility: 'private';
+    default_transparency: 'opaque' | 'transparent';
+    calendar_timezone?: string;
   };
   updated_at: Date;
   created_at: Date;
@@ -159,12 +160,23 @@ export interface CalendarEvent {
   is_all_day: boolean;
   status: 'scheduled' | 'pending' | 'canceled';
   extra: {
+    organizer_email: string;
     description?: string;
     location?: string;
+    url?: string;
     attendees?: CalendarEventAttendee[];
-    visibility: 'default' | 'public' | 'private';
+    transparency: 'default' | Calendar['extra']['default_transparency'];
     is_recurring?: boolean;
+    recurring_id?: string;
+    recurring_sequence?: number;
     recurring_rrule?: string;
+    recurring_rdate?: string;
+    recurring_exdate?: string;
+    is_task?: boolean;
+    task_due_date?: string;
+    task_completed_at?: string;
+    uid?: string;
+    reminders?: CalendarEventReminder[];
   };
   updated_at: Date;
   created_at: Date;
@@ -175,3 +187,10 @@ export interface CalendarEventAttendee {
   status: 'accepted' | 'rejected' | 'invited';
   name?: string;
 }
+
+export interface CalendarEventReminder {
+  uid?: string;
+  start_date: string;
+  type: 'email' | 'sound';
+  acknowledged_at?: string;
+}
diff --git a/lib/utils.ts b/lib/utils.ts
index 82f5ea9..b2416a6 100644
--- a/lib/utils.ts
+++ b/lib/utils.ts
@@ -1,4 +1,4 @@
-import { Contact, ContactAddress, ContactField } from './types.ts';
+import { Calendar, CalendarEvent, Contact, ContactAddress, ContactField } from './types.ts';
 
 let BASE_URL = typeof window !== 'undefined' && window.location
   ? `${window.location.protocol}//${window.location.host}`
@@ -17,9 +17,11 @@ export const helpEmail = 'help@bewcloud.com';
 
 export const CONTACTS_PER_PAGE_COUNT = 20;
 
-export const DAV_RESPONSE_HEADER = '1, 3, 4, addressbook';
-// '1, 3, extended-mkcol, access-control, calendarserver-principal-property-search, oc-resource-sharing, addressbook, nextcloud-checksum-update, nc-calendar-search, nc-enable-birthday-calendar'
-// '1, 3, extended-mkcol, access-control, calendarserver-principal-property-search, calendar-access, calendar-proxy, calendar-auto-schedule, calendar-availability, nc-calendar-trashbin, nc-calendar-webcal-cache, calendarserver-subscribed, oc-resource-sharing, oc-calendar-publishing, calendarserver-sharing, addressbook, nextcloud-checksum-update, nc-calendar-search, nc-enable-birthday-calendar
+export const DAV_RESPONSE_HEADER = '1, 2, 3, 4, addressbook, calendar-access';
+// Response headers from Nextcloud:
+// 1, 3, extended-mkcol, access-control, calendarserver-principal-property-search, oc-resource-sharing, addressbook, nextcloud-checksum-update, nc-calendar-search, nc-enable-birthday-calendar
+// 1, 3, extended-mkcol, access-control, calendarserver-principal-property-search, calendar-access, calendar-proxy, calendar-auto-schedule, calendar-availability, nc-calendar-trashbin, nc-calendar-webcal-cache, calendarserver-subscribed, oc-resource-sharing, oc-calendar-publishing, calendarserver-sharing, addressbook, nextcloud-checksum-update, nc-calendar-search, nc-enable-birthday-calendar
+// 1, 3, extended-mkcol, access-control, calendarserver-principal-property-search, calendar-access, calendar-proxy, calendar-auto-schedule, calendar-availability, nc-calendar-trashbin, nc-calendar-webcal-cache, calendarserver-subscribed, oc-resource-sharing, oc-calendar-publishing, calendarserver-sharing, nextcloud-checksum-update, nc-calendar-search, nc-enable-birthday-calendar
 
 export function isRunningLocally(request: Request) {
   return request.url.includes('localhost');
@@ -388,8 +390,8 @@ export function parseVCardFromTextContents(text: string): Partial<Contact>[] {
     }
 
     if (vCardVersion !== '2.1' && vCardVersion !== '3.0' && vCardVersion !== '4.0') {
-      vCardVersion = '2.1';
       console.warn(`Invalid vCard version found: "${vCardVersion}". Defaulting to 2.1 parser.`);
+      vCardVersion = '2.1';
     }
 
     if (line.startsWith('UID:')) {
@@ -625,6 +627,105 @@ export function parseVCardFromTextContents(text: string): Partial<Contact>[] {
   return partialContacts;
 }
 
+// TODO: Build this
+export function formatCalendarEventsToVCalendar(calendarEvents: CalendarEvent[], _calendar: Calendar): string {
+  const vCalendarText = calendarEvents.map((calendarEvent) =>
+    `BEGIN:VEVENT
+DTSTAMP:${calendarEvent.start_date.toISOString().substring(0, 19).replaceAll('T', '').replaceAll(':', '')}
+DTSTART:${calendarEvent.start_date.toISOString().substring(0, 19).replaceAll('T', '').replaceAll(':', '')}
+DTEND:${calendarEvent.end_date.toISOString().substring(0, 19).replaceAll('T', '').replaceAll(':', '')}
+ORGANIZER;CN=:MAILTO:${calendarEvent.extra.organizer_email}
+SUMMARY:${calendarEvent.title}
+${calendarEvent.extra.uid ? `UID:${calendarEvent.extra.uid}` : ''}
+END:VEVENT`
+  ).join('\n');
+
+  return `BEGIN:VCALENDAR\nVERSION:2.0\nCALSCALE:GREGORIAN\n${vCalendarText}\nEND:VCALENDAR`.split('\n').map((line) =>
+    line.trim()
+  ).filter(
+    Boolean,
+  ).join('\n');
+}
+
+type VCalendarVersion = '1.0' | '2.0';
+
+export function parseVCalendarFromTextContents(text: string): Partial<CalendarEvent>[] {
+  const lines = text.split('\n').map((line) => line.trim()).filter(Boolean);
+
+  const partialCalendarEvents: Partial<CalendarEvent>[] = [];
+
+  let partialCalendarEvent: Partial<CalendarEvent> = {};
+  let vCalendarVersion: VCalendarVersion = '2.0';
+
+  // Loop through every line
+  for (const line of lines) {
+    // Start new vCard version
+    if (line.startsWith('BEGIN:VCALENDAR')) {
+      vCalendarVersion = '2.0';
+      continue;
+    }
+
+    // Start new event
+    if (line.startsWith('BEGIN:VEVENT')) {
+      partialCalendarEvent = {};
+      continue;
+    }
+
+    // Finish contact
+    if (line.startsWith('END:VCARD')) {
+      partialCalendarEvents.push(partialCalendarEvent);
+      continue;
+    }
+
+    // Select proper vCalendar version
+    if (line.startsWith('VERSION:')) {
+      if (line.startsWith('VERSION:1.0')) {
+        vCalendarVersion = '1.0';
+      } else if (line.startsWith('VERSION:2.0')) {
+        vCalendarVersion = '2.0';
+      } else {
+        // Default to 2.0, log warning
+        vCalendarVersion = '2.0';
+        console.warn(`Invalid vCalendar version found: "${line}". Defaulting to 2.0 parser.`);
+      }
+
+      continue;
+    }
+
+    if (vCalendarVersion !== '1.0' && vCalendarVersion !== '2.0') {
+      console.warn(`Invalid vCalendar version found: "${vCalendarVersion}". Defaulting to 2.0 parser.`);
+      vCalendarVersion = '2.0';
+    }
+
+    if (line.startsWith('UID:')) {
+      const uid = line.replace('UID:', '');
+
+      if (!uid) {
+        continue;
+      }
+
+      partialCalendarEvent.extra = {
+        ...(partialCalendarEvent.extra! || {}),
+        uid,
+      };
+
+      continue;
+    }
+
+    // TODO: Build this ( https://en.wikipedia.org/wiki/ICalendar#List_of_components,_properties,_and_parameters )
+
+    if (line.startsWith('SUMMARY:')) {
+      const title = line.split('SUMMARY:')[1] || '';
+
+      partialCalendarEvent.title = title;
+
+      continue;
+    }
+  }
+
+  return partialCalendarEvents;
+}
+
 export const capitalizeWord = (string: string) => {
   return `${string.charAt(0).toLocaleUpperCase()}${string.slice(1)}`;
 };
@@ -684,7 +785,7 @@ export function getDaysForWeek(
     const dayDate = new Date(startingDate);
     dayDate.setDate(dayDate.getDate() + dayIndex);
 
-    const isSameDay = dayDate.toISOString() === shortIsoDate;
+    const isSameDay = dayDate.toISOString().substring(0, 10) === shortIsoDate;
 
     days[dayIndex] = {
       date: dayDate,
diff --git a/routes/.well-known/caldav.tsx b/routes/.well-known/caldav.tsx
new file mode 100644
index 0000000..e479c7a
--- /dev/null
+++ b/routes/.well-known/caldav.tsx
@@ -0,0 +1,7 @@
+// Nextcloud/ownCloud mimicry
+export function handler(): Response {
+  return new Response('Redirecting...', {
+    status: 307,
+    headers: { Location: '/dav' },
+  });
+}
diff --git a/routes/calendar.tsx b/routes/calendar.tsx
index faece8d..f234a87 100644
--- a/routes/calendar.tsx
+++ b/routes/calendar.tsx
@@ -1,107 +1,9 @@
 import { Handlers, PageProps } from 'fresh/server.ts';
 
 import { Calendar, CalendarEvent, FreshContextState } from '/lib/types.ts';
-// import { getCalendars, getCalendarEvents } from '/lib/data/calendar.ts';
+import { getCalendarEvents, getCalendars } from '/lib/data/calendar.ts';
 import MainCalendar from '/islands/calendar/MainCalendar.tsx';
 
-async function getCalendars(userId: string): Promise<Pick<Calendar, 'id' | 'name' | 'color' | 'is_visible'>[]> {
-  // TODO: Remove this
-  await new Promise((resolve) => setTimeout(() => resolve(true), 1));
-
-  return [
-    {
-      id: 'family-1',
-      name: 'Family',
-      color: 'bg-purple-500',
-      is_visible: true,
-    },
-    {
-      id: 'personal-1',
-      name: 'Personal',
-      color: 'bg-sky-600',
-      is_visible: true,
-    },
-    {
-      id: 'house-chores-1',
-      name: 'House Chores',
-      color: 'bg-red-700',
-      is_visible: true,
-    },
-  ];
-}
-
-async function getCalendarEvents(userId: string, calendarIds: string[]): Promise<CalendarEvent[]> {
-  // TODO: Remove this
-  await new Promise((resolve) => setTimeout(() => resolve(true), 1));
-
-  return [
-    {
-      id: 'event-1',
-      user_id: userId,
-      calendar_id: 'family-1',
-      revision: 'fake-rev',
-      title: 'Dentist',
-      start_date: new Date('2024-03-18T14:00:00.000Z'),
-      end_date: new Date('2024-03-18T15:00:00.000Z'),
-      is_all_day: false,
-      status: 'scheduled',
-      extra: {
-        visibility: 'default',
-      },
-      updated_at: new Date(),
-      created_at: new Date(),
-    },
-    {
-      id: 'event-2',
-      user_id: userId,
-      calendar_id: 'family-1',
-      revision: 'fake-rev',
-      title: 'Dermatologist',
-      start_date: new Date('2024-03-18T16:30:00.000Z'),
-      end_date: new Date('2024-03-18T17:30:00.000Z'),
-      is_all_day: false,
-      status: 'scheduled',
-      extra: {
-        visibility: 'default',
-      },
-      updated_at: new Date(),
-      created_at: new Date(),
-    },
-    {
-      id: 'event-3',
-      user_id: userId,
-      calendar_id: 'house-chores-1',
-      revision: 'fake-rev',
-      title: 'Vacuum',
-      start_date: new Date('2024-03-19T15:00:00.000Z'),
-      end_date: new Date('2024-03-19T16:00:00.000Z'),
-      is_all_day: false,
-      status: 'scheduled',
-      extra: {
-        visibility: 'default',
-      },
-      updated_at: new Date(),
-      created_at: new Date(),
-    },
-    {
-      id: 'event-4',
-      user_id: userId,
-      calendar_id: 'personal-1',
-      revision: 'fake-rev',
-      title: 'Schedule server updates',
-      start_date: new Date('2024-03-20T09:00:00.000Z'),
-      end_date: new Date('2024-03-20T21:00:00.000Z'),
-      is_all_day: true,
-      status: 'scheduled',
-      extra: {
-        visibility: 'default',
-      },
-      updated_at: new Date(),
-      created_at: new Date(),
-    },
-  ];
-}
-
 interface Data {
   userCalendars: Pick<Calendar, 'id' | 'name' | 'color' | 'is_visible'>[];
   userCalendarEvents: CalendarEvent[];
diff --git a/routes/dav/calendars.tsx b/routes/dav/calendars.tsx
new file mode 100644
index 0000000..b7c6ce3
--- /dev/null
+++ b/routes/dav/calendars.tsx
@@ -0,0 +1,133 @@
+import { Handler } from 'fresh/server.ts';
+
+import { FreshContextState } from '/lib/types.ts';
+import { convertObjectToDavXml, DAV_RESPONSE_HEADER, escapeHtml } from '/lib/utils.ts';
+import { createSessionCookie } from '/lib/auth.ts';
+import { getCalendars } from '/lib/data/calendar.ts';
+
+interface Data {}
+
+interface DavResponse {
+  'd:href': string;
+  'd:propstat': {
+    'd:prop': {
+      'd:resourcetype'?: {
+        'd:collection': {};
+        'cal:calendar'?: {};
+      };
+      'd:displayname'?: string | {};
+      'd:getetag'?: string | {};
+      'cs:getctag'?: string | {};
+      'd:current-user-principal'?: {
+        'd:href': string;
+      };
+      'd:principal-URL'?: {};
+    };
+    'd:status': string;
+  }[];
+}
+
+interface DavMultiStatusResponse {
+  'd:multistatus': {
+    'd:response': DavResponse[];
+  };
+  'd:multistatus_attributes': {
+    'xmlns:d': string;
+    'xmlns:s': string;
+    'xmlns:cal': string;
+    'xmlns:oc': string;
+    'xmlns:nc': string;
+    'xmlns:cs': string;
+  };
+}
+
+interface ResponseBody extends DavMultiStatusResponse {}
+
+export const handler: Handler<Data, FreshContextState> = async (request, context) => {
+  if (!context.state.user) {
+    return new Response('Unauthorized', {
+      status: 401,
+      headers: { 'www-authenticate': 'Basic realm="bewCloud", charset="UTF-8"' },
+    });
+  }
+
+  if (request.method === 'GET') {
+    return new Response('This is the WebDAV interface. It can only be accessed by WebDAV clients.');
+  }
+
+  if (request.method !== 'PROPFIND' && request.method !== 'REPORT') {
+    return new Response('Bad Request', { status: 400 });
+  }
+
+  const responseBody: ResponseBody = {
+    'd:multistatus': {
+      'd:response': [
+        {
+          'd:href': '/dav/calendars/',
+          'd:propstat': [{
+            'd:prop': {
+              'd:resourcetype': {
+                'd:collection': {},
+              },
+              'd:current-user-principal': {
+                'd:href': '/dav/principals/',
+              },
+            },
+            'd:status': 'HTTP/1.1 200 OK',
+          }, {
+            'd:prop': { 'd:principal-URL': {}, 'd:displayname': {}, 'cs:getctag': {} },
+            'd:status': 'HTTP/1.1 404 Not Found',
+          }],
+        },
+      ],
+    },
+    'd:multistatus_attributes': {
+      'xmlns:d': 'DAV:',
+      'xmlns:s': 'http://sabredav.org/ns',
+      'xmlns:cal': 'urn:ietf:params:xml:ns:caldav',
+      'xmlns:oc': 'http://owncloud.org/ns',
+      'xmlns:nc': 'http://nextcloud.org/ns',
+      'xmlns:cs': 'http://calendarserver.org/ns/',
+    },
+  };
+
+  const calendars = await getCalendars(context.state.user.id);
+
+  for (const calendar of calendars) {
+    responseBody['d:multistatus']['d:response'].push({
+      'd:href': `/dav/calendars/${calendar.id}`,
+      'd:propstat': [{
+        'd:prop': {
+          'd:resourcetype': {
+            'd:collection': {},
+            'cal:calendar': {},
+          },
+          'd:displayname': calendar.name,
+          'd:getetag': escapeHtml(`"${calendar.revision}"`),
+          'cs:getctag': calendar.revision,
+          'd:current-user-principal': {
+            'd:href': '/dav/principals/',
+          },
+        },
+        'd:status': 'HTTP/1.1 200 OK',
+      }, {
+        'd:prop': { 'd:principal-URL': {} },
+        'd:status': 'HTTP/1.1 404 Not Found',
+      }],
+    });
+  }
+
+  const response = new Response(convertObjectToDavXml(responseBody, true), {
+    headers: {
+      'content-type': 'application/xml; charset=utf-8',
+      'dav': DAV_RESPONSE_HEADER,
+    },
+    status: 207,
+  });
+
+  if (context.state.session) {
+    return response;
+  }
+
+  return createSessionCookie(request, context.state.user, response, true);
+};
diff --git a/routes/dav/calendars/[calendarId].tsx b/routes/dav/calendars/[calendarId].tsx
new file mode 100644
index 0000000..f173231
--- /dev/null
+++ b/routes/dav/calendars/[calendarId].tsx
@@ -0,0 +1,209 @@
+import { Handler } from 'fresh/server.ts';
+
+import { Calendar, FreshContextState } from '/lib/types.ts';
+import {
+  buildRFC822Date,
+  convertObjectToDavXml,
+  DAV_RESPONSE_HEADER,
+  escapeHtml,
+  escapeXml,
+  formatCalendarEventsToVCalendar,
+  parseVCalendarFromTextContents,
+} from '/lib/utils.ts';
+import { getCalendar, getCalendarEvents } from '/lib/data/calendar.ts';
+import { createSessionCookie } from '/lib/auth.ts';
+
+interface Data {}
+
+interface DavResponse {
+  'd:href': string;
+  'd:propstat': {
+    'd:prop': {
+      'd:resourcetype'?: {
+        'd:collection'?: {};
+        'cal:calendar'?: {};
+      };
+      'd:displayname'?: string | {};
+      'cal:calendar-data'?: string;
+      'd:getlastmodified'?: string;
+      'd:getetag'?: string;
+      'cs:getctag'?: string;
+      'd:getcontenttype'?: string;
+      'd:getcontentlength'?: {};
+      'd:creationdate'?: string;
+    };
+    'd:status': string;
+  }[];
+}
+
+interface DavMultiStatusResponse {
+  'd:multistatus': {
+    'd:response': DavResponse[];
+  };
+  'd:multistatus_attributes': {
+    'xmlns:d': string;
+    'xmlns:s': string;
+    'xmlns:cal': string;
+    'xmlns:oc': string;
+    'xmlns:nc': string;
+    'xmlns:cs': string;
+  };
+}
+
+interface ResponseBody extends DavMultiStatusResponse {}
+
+export const handler: Handler<Data, FreshContextState> = async (request, context) => {
+  if (!context.state.user) {
+    return new Response('Unauthorized', {
+      status: 401,
+      headers: { 'www-authenticate': 'Basic realm="bewCloud", charset="UTF-8"' },
+    });
+  }
+
+  if (
+    request.method !== 'PROPFIND' && request.method !== 'REPORT' && request.method !== 'GET' &&
+    request.method !== 'PUT' && request.method !== 'MKCALENDAR'
+  ) {
+    return new Response('Bad Request', { status: 400 });
+  }
+
+  const { calendarId } = context.params;
+
+  let calendar: Calendar | null = null;
+
+  try {
+    calendar = await getCalendar(calendarId, context.state.user.id);
+  } catch (error) {
+    console.error(error);
+  }
+
+  if (!calendar) {
+    // TODO: Support MKCALENDAR
+    return new Response('Not found', { status: 404 });
+  }
+
+  if (request.method === 'PUT') {
+    const requestBody = await request.clone().text();
+
+    const [partialCalendarEvent] = parseVCalendarFromTextContents(requestBody);
+
+    if (partialCalendarEvent.title) {
+      // TODO: Build this
+      // const newCalendarEvent = await createCalendarEvent(
+      //   context.state.user.id,
+      //   partialCalendarEvent.title,
+      //   partialCalendarEvent.start_date,
+      //   partialCalendarEvent.end_date,
+      // );
+
+      // // Use the sent id for the UID
+      // if (!partialCalendarEvent.extra?.uid) {
+      //   partialCalendarEvent.extra = {
+      //     ...(partialCalendarEvent.extra! || {}),
+      //     uid: calendarId,
+      //   };
+      // }
+
+      // newCalendarEvent.extra = partialCalendarEvent.extra!;
+
+      // await updateCalendarEvent(newCalendarEvent);
+
+      // const calendarEvent = await getCalendarEvent(newCalendarEvent.id, context.state.user.id);
+
+      // return new Response('Created', { status: 201, headers: { 'etag': `"${calendarEvent.revision}"` } });
+      return new Response('Not found', { status: 404 });
+    }
+  }
+
+  const calendarEvents = await getCalendarEvents(context.state.user.id, [calendar.id]);
+
+  if (request.method === 'GET') {
+    const response = new Response(formatCalendarEventsToVCalendar(calendarEvents, calendar), {
+      status: 200,
+    });
+
+    if (context.state.session) {
+      return response;
+    }
+
+    return createSessionCookie(request, context.state.user, response, true);
+  }
+
+  const requestBody = (await request.clone().text()).toLowerCase();
+
+  const includeVCalendar = requestBody.includes('calendar-data');
+
+  const parsedCalendar: DavResponse = {
+    'd:href': `/dav/calendars/${calendar.id}`,
+    'd:propstat': [{
+      'd:prop': {
+        'd:displayname': calendar.name,
+        'd:getlastmodified': buildRFC822Date(calendar.updated_at.toISOString()),
+        'd:getetag': escapeHtml(`"${calendar.revision}"`),
+        'cs:getctag': calendar.revision,
+        'd:getcontenttype': 'text/calendar; charset=utf-8',
+        'd:resourcetype': {},
+      },
+      'd:status': 'HTTP/1.1 200 OK',
+    }],
+  };
+
+  const parsedCalendarEvents = calendarEvents.map((calendarEvent) => {
+    const parsedCalendarEvent: DavResponse = {
+      'd:href': `/dav/calendars/${calendar!.id}/${calendarEvent.id}.ics`,
+      'd:propstat': [{
+        'd:prop': {
+          'd:getlastmodified': buildRFC822Date(calendarEvent.updated_at.toISOString()),
+          'd:getetag': escapeHtml(`"${calendarEvent.revision}"`),
+          'cs:getctag': calendarEvent.revision,
+          'd:getcontenttype': 'text/calendar; charset=utf-8',
+          'd:resourcetype': {},
+          'd:creationdate': buildRFC822Date(calendarEvent.created_at.toISOString()),
+        },
+        'd:status': 'HTTP/1.1 200 OK',
+      }, {
+        'd:prop': {
+          'd:displayname': {},
+          'd:getcontentlength': {},
+        },
+        'd:status': 'HTTP/1.1 404 Not Found',
+      }],
+    };
+
+    if (includeVCalendar) {
+      parsedCalendarEvent['d:propstat'][0]['d:prop']['cal:calendar-data'] = escapeXml(
+        formatCalendarEventsToVCalendar([calendarEvent], calendar!),
+      );
+    }
+
+    return parsedCalendarEvent;
+  });
+
+  const responseBody: ResponseBody = {
+    'd:multistatus': {
+      'd:response': [parsedCalendar, ...parsedCalendarEvents],
+    },
+    'd:multistatus_attributes': {
+      'xmlns:d': 'DAV:',
+      'xmlns:s': 'http://sabredav.org/ns',
+      'xmlns:cal': 'urn:ietf:params:xml:ns:caldav',
+      'xmlns:oc': 'http://owncloud.org/ns',
+      'xmlns:nc': 'http://nextcloud.org/ns',
+      'xmlns:cs': 'http://calendarserver.org/ns/',
+    },
+  };
+
+  const response = new Response(convertObjectToDavXml(responseBody, true), {
+    headers: {
+      'content-type': 'application/xml; charset=utf-8',
+      'dav': DAV_RESPONSE_HEADER,
+    },
+    status: 207,
+  });
+
+  if (context.state.session) {
+    return response;
+  }
+
+  return createSessionCookie(request, context.state.user, response, true);
+};
diff --git a/routes/dav/calendars/[calendarId]/[calendarEventId].ics.tsx b/routes/dav/calendars/[calendarId]/[calendarEventId].ics.tsx
new file mode 100644
index 0000000..94d8175
--- /dev/null
+++ b/routes/dav/calendars/[calendarId]/[calendarEventId].ics.tsx
@@ -0,0 +1,229 @@
+import { Handler } from 'fresh/server.ts';
+
+import { Calendar, CalendarEvent, FreshContextState } from '/lib/types.ts';
+import {
+  buildRFC822Date,
+  convertObjectToDavXml,
+  DAV_RESPONSE_HEADER,
+  escapeHtml,
+  escapeXml,
+  formatCalendarEventsToVCalendar,
+  parseVCalendarFromTextContents,
+} from '/lib/utils.ts';
+import { getCalendar, getCalendarEvent, getCalendarEvents } from '/lib/data/calendar.ts';
+import { createSessionCookie } from '/lib/auth.ts';
+
+interface Data {}
+
+interface DavResponse {
+  'd:href': string;
+  'd:propstat': {
+    'd:prop': {
+      'd:resourcetype'?: {
+        'd:collection'?: {};
+        'cal:calendar'?: {};
+      };
+      'd:displayname'?: string | {};
+      'cal:calendar-data'?: string;
+      'd:getlastmodified'?: string;
+      'd:getetag'?: string;
+      'cs:getctag'?: string;
+      'd:getcontenttype'?: string;
+      'd:getcontentlength'?: {};
+      'd:creationdate'?: string;
+    };
+    'd:status': string;
+  }[];
+}
+
+interface DavMultiStatusResponse {
+  'd:multistatus': {
+    'd:response': DavResponse[];
+  };
+  'd:multistatus_attributes': {
+    'xmlns:d': string;
+    'xmlns:s': string;
+    'xmlns:cal': string;
+    'xmlns:oc': string;
+    'xmlns:nc': string;
+    'xmlns:cs': string;
+  };
+}
+
+interface ResponseBody extends DavMultiStatusResponse {}
+
+export const handler: Handler<Data, FreshContextState> = async (request, context) => {
+  if (!context.state.user) {
+    return new Response('Unauthorized', {
+      status: 401,
+      headers: { 'www-authenticate': 'Basic realm="bewCloud", charset="UTF-8"' },
+    });
+  }
+
+  if (
+    request.method !== 'PROPFIND' && request.method !== 'REPORT' && request.method !== 'GET' &&
+    request.method !== 'PUT' && request.method !== 'DELETE'
+  ) {
+    return new Response('Bad Request', { status: 400 });
+  }
+
+  const { calendarId, calendarEventId } = context.params;
+
+  let calendar: Calendar | null = null;
+  let calendarEvent: CalendarEvent | null = null;
+
+  try {
+    calendar = await getCalendar(calendarId, context.state.user.id);
+  } catch (error) {
+    console.error(error);
+  }
+
+  if (!calendar) {
+    return new Response('Not found', { status: 404 });
+  }
+
+  try {
+    calendarEvent = await getCalendarEvent(calendarEventId, calendarId, context.state.user.id);
+  } catch (error) {
+    console.error(error);
+  }
+
+  if (!calendarEvent) {
+    if (request.method === 'PUT') {
+      // TODO: Build this
+      // const newCalendarEvent = await createCalendarEvent(
+      //   context.state.user.id,
+      //   partialCalendarEvent.title,
+      //   partialCalendarEvent.start_date,
+      //   partialCalendarEvent.end_date,
+      // );
+
+      // // Use the sent id for the UID
+      // if (!partialCalendarEvent.extra?.uid) {
+      //   partialCalendarEvent.extra = {
+      //     ...(partialCalendarEvent.extra! || {}),
+      //     uid: calendarId,
+      //   };
+      // }
+
+      // newCalendarEvent.extra = partialCalendarEvent.extra!;
+
+      // await updateCalendarEvent(newCalendarEvent);
+
+      // const calendarEvent = await getCalendarEvent(newCalendarEvent.id, context.state.user.id);
+
+      // return new Response('Created', { status: 201, headers: { 'etag': `"${calendarEvent.revision}"` } });
+    }
+
+    return new Response('Not found', { status: 404 });
+  }
+
+  // TODO: Build this
+  // if (request.method === 'DELETE') {
+  //   const clientRevision = request.headers.get('if-match') || request.headers.get('etag');
+
+  //   // Don't update outdated data
+  //   if (clientRevision && clientRevision !== `"${calendarEvent.revision}"`) {
+  //     return new Response(null, { status: 204, headers: { 'etag': `"${calendarEvent.revision}"` } });
+  //   }
+
+  //   await deleteContact(contactId, context.state.user.id);
+
+  //   return new Response(null, { status: 202 });
+  // }
+
+  // if (request.method === 'PUT') {
+  //   const clientRevision = request.headers.get('if-match') || request.headers.get('etag');
+
+  //   // Don't update outdated data
+  //   if (clientRevision && clientRevision !== `"${contact.revision}"`) {
+  //     return new Response(null, { status: 204, headers: { 'etag': `"${contact.revision}"` } });
+  //   }
+
+  //   const requestBody = await request.clone().text();
+
+  //   const [partialContact] = parseVCardFromTextContents(requestBody);
+
+  //   contact = {
+  //     ...contact,
+  //     ...partialContact,
+  //   };
+
+  //   await updateContact(contact);
+
+  //   contact = await getContact(contactId, context.state.user.id);
+
+  //   return new Response(null, { status: 204, headers: { 'etag': `"${contact.revision}"` } });
+  // }
+
+  if (request.method === 'GET') {
+    const response = new Response(formatCalendarEventsToVCalendar([calendarEvent], calendar), {
+      status: 200,
+    });
+
+    if (context.state.session) {
+      return response;
+    }
+
+    return createSessionCookie(request, context.state.user, response, true);
+  }
+
+  const requestBody = (await request.clone().text()).toLowerCase();
+
+  const includeVCalendar = requestBody.includes('calendar-data');
+
+  const parsedCalendarEvent: DavResponse = {
+    'd:href': `/dav/calendars/${calendar!.id}/${calendarEvent.id}.ics`,
+    'd:propstat': [{
+      'd:prop': {
+        'd:getlastmodified': buildRFC822Date(calendarEvent.updated_at.toISOString()),
+        'd:getetag': escapeHtml(`"${calendarEvent.revision}"`),
+        'cs:getctag': calendarEvent.revision,
+        'd:getcontenttype': 'text/calendar; charset=utf-8',
+        'd:resourcetype': {},
+        'd:creationdate': buildRFC822Date(calendarEvent.created_at.toISOString()),
+      },
+      'd:status': 'HTTP/1.1 200 OK',
+    }, {
+      'd:prop': {
+        'd:displayname': {},
+        'd:getcontentlength': {},
+      },
+      'd:status': 'HTTP/1.1 404 Not Found',
+    }],
+  };
+
+  if (includeVCalendar) {
+    parsedCalendarEvent['d:propstat'][0]['d:prop']['cal:calendar-data'] = escapeXml(
+      formatCalendarEventsToVCalendar([calendarEvent], calendar!),
+    );
+  }
+
+  const responseBody: ResponseBody = {
+    'd:multistatus': {
+      'd:response': [parsedCalendarEvent],
+    },
+    'd:multistatus_attributes': {
+      'xmlns:d': 'DAV:',
+      'xmlns:s': 'http://sabredav.org/ns',
+      'xmlns:cal': 'urn:ietf:params:xml:ns:caldav',
+      'xmlns:oc': 'http://owncloud.org/ns',
+      'xmlns:nc': 'http://nextcloud.org/ns',
+      'xmlns:cs': 'http://calendarserver.org/ns/',
+    },
+  };
+
+  const response = new Response(convertObjectToDavXml(responseBody, true), {
+    headers: {
+      'content-type': 'application/xml; charset=utf-8',
+      'dav': DAV_RESPONSE_HEADER,
+    },
+    status: 207,
+  });
+
+  if (context.state.session) {
+    return response;
+  }
+
+  return createSessionCookie(request, context.state.user, response, true);
+};
diff --git a/routes/dav/principals.tsx b/routes/dav/principals.tsx
index a384a3b..e2d4fff 100644
--- a/routes/dav/principals.tsx
+++ b/routes/dav/principals.tsx
@@ -18,6 +18,9 @@ interface DavResponse {
       'card:addressbook-home-set'?: {
         'd:href': string;
       };
+      'cal:calendar-home-set'?: {
+        'd:href': string;
+      };
       'd:current-user-principal'?: {
         'd:href': string;
       };
@@ -109,6 +112,12 @@ export const handler: Handler<Data, FreshContextState> = async (request, context
       };
     }
 
+    if (requestBody.includes('calendar-home-set')) {
+      propResponse['d:propstat']['d:prop']['cal:calendar-home-set'] = {
+        'd:href': `/dav/calendars/`,
+      };
+    }
+
     responseBody['d:multistatus']['d:response'].push(propResponse);
   }