synapse - introduce vars to control server notices

roles/custom/matrix-synapse/defaults/main.yml

@@ -1544,6 +1544,17 @@ matrix_s3_media_store_path: "{{ matrix_synapse_media_store_path }}"
 # Controls whether the self-check feature should validate SSL certificates.
 matrix_synapse_self_check_validate_certificates: true
 
+# Controls whether server notices are enabled.
+matrix_synapse_server_notices_enabled: false
+# The localpart of the user that will send server notices, this user will be created if it doesn't exist.
+matrix_synapse_server_notices_system_mxid_localpart: "notices"
+# The display name of the user that will send server notices.
+matrix_synapse_server_notices_system_mxid_display_name: "Server Notices"
+# Optional avatar URL for the user that will send server notices, example: mxc://example.com/abc123
+matrix_synapse_server_notices_system_mxid_avatar_url: ~
+# The name of the room where server notices will be sent, this room will be created if it doesn't exist.
+matrix_synapse_server_notices_room_name: "Server Notices"
+
 # Controls whether searching the public room list is enabled.
 matrix_synapse_enable_room_list_search: true
 

roles/custom/matrix-synapse/templates/synapse/homeserver.yaml.j2

@@ -2731,6 +2731,15 @@ stats:
 #  system_mxid_display_name: "Server Notices"
 #  system_mxid_avatar_url: "mxc://example.com/oumMVlgDnLYFaPVkExemNVVZ"
 #  room_name: "Server Notices"
+{% if matrix_synapse_server_notices_enabled %}
+server_notices:
+  system_mxid_localpart: {{ matrix_synapse_server_notices_system_mxid_localpart | string | to_json }}
+  system_mxid_display_name: {{ matrix_synapse_server_notices_system_mxid_display_name | string | to_json }}
+{% if matrix_synapse_server_notices_system_mxid_avatar_url %}
+  system_mxid_avatar_url: {{ matrix_synapse_server_notices_system_mxid_avatar_url | string | to_json }}
+{% endif %}
+  room_name: {{ matrix_synapse_server_notices_room_name | string | to_json }}
+{% endif %}