From 7035af87d8d96c9381b47ed65a39e05ead1dc3b5 Mon Sep 17 00:00:00 2001
From: Slavi Pantaleev <slavi@devture.com>
Date: Thu, 9 Apr 2020 09:58:35 +0300
Subject: [PATCH] Add support for Jitsi discovery for Riot via
 /.well-known/matrix/client

This will not work yet, as no version of Riot currently supports it.
It's expected to land in riot-web v1.5.16 via matrix-org/matrix-react-sdk#4348.
---
 group_vars/matrix_servers                                    | 2 ++
 roles/matrix-base/defaults/main.yml                          | 5 +++++
 .../templates/static-files/well-known/matrix-client.j2       | 5 +++++
 3 files changed, 12 insertions(+)

diff --git a/group_vars/matrix_servers b/group_vars/matrix_servers
index 474ef9601..864cd7d40 100755
--- a/group_vars/matrix_servers
+++ b/group_vars/matrix_servers
@@ -18,6 +18,8 @@
 
 matrix_identity_server_url: "{{ 'https://' + matrix_synapse_trusted_third_party_id_servers[0] if matrix_synapse_trusted_third_party_id_servers|length > 0 else None }}"
 
+matrix_riot_jitsi_preferredDomain: "{{ matrix_server_fqn_jitsi if matrix_jitsi_enabled else '' }}"
+
 ######################################################################
 #
 # /matrix-base
diff --git a/roles/matrix-base/defaults/main.yml b/roles/matrix-base/defaults/main.yml
index c6ed430b9..7f4c6ace7 100644
--- a/roles/matrix-base/defaults/main.yml
+++ b/roles/matrix-base/defaults/main.yml
@@ -43,6 +43,11 @@ matrix_identity_server_url: ~
 matrix_integration_manager_rest_url: ~
 matrix_integration_manager_ui_url: ~
 
+# The domain name where a Jitsi server is self-hosted.
+# If set, `/.well-known/matrix/client` will suggest Riot clients to use that Jitsi server.
+# See: https://github.com/vector-im/riot-web/blob/develop/docs/jitsi.md#configuring-riot-to-use-your-self-hosted-jitsi-server
+matrix_riot_jitsi_preferredDomain: ''
+
 # The Docker network that all services would be put into
 matrix_docker_network: "matrix"
 
diff --git a/roles/matrix-base/templates/static-files/well-known/matrix-client.j2 b/roles/matrix-base/templates/static-files/well-known/matrix-client.j2
index 719656a4a..edbaa62eb 100644
--- a/roles/matrix-base/templates/static-files/well-known/matrix-client.j2
+++ b/roles/matrix-base/templates/static-files/well-known/matrix-client.j2
@@ -18,4 +18,9 @@
 		]
 	}
 	{% endif %}
+	{% if matrix_riot_jitsi_preferredDomain %},
+	"im.vector.riot.jitsi": {
+		"preferredDomain": {{ matrix_riot_jitsi_preferredDomain|to_json }}
+	}
+	{% endif %}
 }