add optional group check for dbus cache

Author: FreekBes

defaults/main.yml

@@ -1,6 +1,11 @@
 ---
 nody_greeter_version: "1.5.2"
 
+# Specify where to download the codam-web-greeter from and which release
 codam_web_greeter_git_repo: "https://github.com/codam-coding-college/codam-web-greeter"
 codam_web_greeter_version: "1.0.10"
 codam_web_greeter_release_zip_filename: "codam-web-greeter.zip"
+
+# Define whether or not to check if the user is in a specific group when caching their user data with dbus
+dbus_cache_group_check_enabled: false
+dbus_cache_group_check_group: "student" # default ou=student,ou=groups,dc=42campus,dc=org

templates/usr/share/42/scripts/hook-greeter-setup.sh.j2

@@ -22,6 +22,16 @@ USER_SESSIONS=$(/usr/bin/loginctl list-sessions --no-legend | /usr/bin/awk '{pri
 # Loop over all active sessions and cache them with dbus-send
 # This is required for the codam-web-greeter and other lock screens to work properly (fetch the list of users)
 for USER in $USER_SESSIONS; do
+{% if dbus_cache_group_check_enabled == true %}
+	# Check if the user is in the piscine group
+	USER_GROUPS=$(/usr/bin/id -Gn "$USER")
+	if /usr/bin/grep -q '{{ dbus_cache_group_check_group }}' <<<"$USERGROUPS"; then
+		# If not, skip the user
+		echo "Skipping user caching for $USER, not in {{ dbus_cache_group_check_group }} group ($USER_GROUPS)"
+		continue
+	fi
+{% endif %}
+
 	# Cache the user
 	/usr/bin/dbus-send --system --print-reply --type=method_call --dest=org.freedesktop.Accounts /org/freedesktop/Accounts org.freedesktop.Accounts.CacheUser string:"$USER" || true
 	echo "Cached user $USER"