====== Radicale ======

[[https://radicale.org/v3.html|Radicale]] is a CalDAV/CardDAV server.

[[https://en.wikipedia.org/wiki/Web-based_Distributed_Authoring_and_Versioning|CalDAV]] is the WebDAV extension to manage Calendars

[[https://en.wikipedia.org/wiki/CardDAV|CardDAV]] is the WebDAV extension to manage address books and contacts in general.

To add support for both, which will allow your phone to sync contacts and calendars with your home server, i choose to use the great, simple and effective [[https://radicale.org/v3.html|Radicale]] server. 

Please note that Radicale do not provide a user-interface to **edit** or **use** calendars or contacts, you need third party apps for that.

To install radicale, of course, you need it's dedicated user, so add user:
<code bash>
useradd -d /data/daemons/radicale -m radicale
</code>

Create data folder:
<code>
mkdir /data/cardcal
chown radicale:radicale /data/cardcal
</code>

Radicale uses //pip//, so as usual enable it on Gentoo for user Radicale by creating the file **/data/daemons/radicale/.config/pip/pip.conf** with this content:
<file - pip.conf>
[global]
break-system-packages = true
user = true
</file>

Install as user radicale:
<code bash>
su - radicale
pip install --upgrade radicale
</code>

Create the config file **~/.config/radicale/config**:
<file - config>
[server]
# Bind all addresses
hosts = 127.0.0.1:5232

[auth]
type = http_x_remote_user
#htpasswd_filename = ~/.config/radicale/users
#htpasswd_encryption = md5

[storage]
filesystem_folder = /data/cardcal
</file>

then start it:
<code bash>
su - radicale
radicale
</code>

==== Reverse Proxy ====

As usual you want it protected by the Reverse Proxy, so create the **radicale.conf** file:
<file - radicale.conf>
location /radicale/ { 
# The trailing / is important!
    proxy_pass        http://localhost:5232/; # The / is important!
    proxy_set_header  X-Script-Name /radicale;
    proxy_set_header  X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header  Host $http_host;
    proxy_pass_header Authorization;
    proxy_set_header     X-Remote-User $remote_user; # allow automatic authentication using proxy credentials
    # to prevent timeouts importing huge calendars or contacts lists
    proxy_send_timeout 600;
    proxy_read_timeout 600;
}
</file>
add this config file to NGINX (see [[selfhost:nginx|The Reverse Proxy concept]] for more details) and restart nginx.

Now go with browser to **http://10.0.0.1/radicale** to finish setup.

===== Startup =====

Since i use OpenRC, to start radicale simply create the following script under /etc/init.d:
<file - /etc/init.d/radicale>
#!/sbin/openrc-run
# Copyright 1999-2021 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

description="Radicale WebDAV / WebCAL server"
pidfile="/run/radicale.pid"
command_background=true
command="/data/daemons/radicale/.local/bin/radicale"
command_args=""
command_user="radicale:users"

depend() {
        need net
}
</file>

Make it executable and add the service to the default runlevel:
<code bash>
chmod +x /etc/init.d/radicale
rc-update add radicale default
</code>

==== Sharing calendars ====

Radicale doesn't directly support sharing calendars (see [[https://github.com/Kozea/Radicale/issues/696|here]]) but it's pretty easy to share calendars between users anyway by creating simple symlinks.

So, first of all login on Radicale web GUI with all the users you want to share the calendar with, then create in one of them the actual calendar.

At this point, you only need to link the calendar folder inside all he users:
<code bash>
ln -s /data/cardcal/collection-root/user1/72757af3-557c-e8e4-bdd7-c9bc5689b862   /data/cardcal/collection-root/user2/
</code>

and that's it.