--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/nabble/view/naml/rest_group_control.naml	Thu Mar 21 19:15:52 2019 -0600
@@ -0,0 +1,68 @@
+<!--
+Add/Remove users to/from groups.
+http://<site-domain>/template/NamlServlet.jtp?macro=rest_group_control&owner=owner@example.com&password=123456&user=user@example.com&action=add&group=Members
+http://<site-domain>/template/NamlServlet.jtp?macro=rest_group_control&owner=owner@example.com&password=123456&user=user@example.com&action=remove&group=Members
+Sample URLs
+-->
+<macro name="rest_group_control" requires="servlet">
+	<n.check_not_null value="[n.rest_owner_email/]" error_msg="Invalid owner email."/>
+	<n.check_not_null value="[n.rest_owner_password_hash/]" error_msg="Invalid password hash."/>
+	<n.check_not_null value="[n.rest_user_email/]" error_msg="Invalid user email."/>
+	<n.check_not_null value="[n.rest_action/]" error_msg="Missing action."/>
+	<n.check_not_null value="[n.rest_group/]" error_msg="Missing group name."/>
+
+	<n.catch_exception. id="save-block">
+		<n.if.check_registered_user email="[n.rest_owner_email/]" password_hash="[n.rest_owner_password_hash/]">
+			<then>
+				<n.if.regex_matches text="[n.rest_action/]" pattern="add|remove">
+					<then>
+						<n.get_or_create_user. email="[n.rest_owner_email/]">
+							<n.as_user_page.>
+								<n.edit_page_user.>
+									<n.if.equal value1="[n.rest_action/]" value2="add">
+										<then><n.add_to_group.rest_group/></then>
+										<else><n.remove_from_group.rest_group/></else>
+									</n.if.equal>
+								</n.edit_page_user.>
+								Success.
+							</n.as_user_page.>
+						</n.get_or_create_user.>
+					</then>
+					<else>
+						Actions should be "add" or "remove".
+					</else>
+				</n.if.regex_matches>
+			</then>
+			<else>Invalid owner email and password.</else>
+		</n.if.check_registered_user>
+	</n.catch_exception.>
+</macro>
+
+<macro name="check_not_null" parameters="value,error_msg">
+	<n.if.is_null.value>
+		<then>
+			<n.error_msg/>
+			<n.exit/>
+		</then>
+	</n.if.is_null.value>
+</macro>
+
+<macro name="rest_owner_email">
+	<n.get_parameter name="owner"/>
+</macro>
+
+<macro name="rest_owner_password_hash">
+	<n.get_parameter name="password"/>
+</macro>
+
+<macro name="rest_action">
+	<n.get_parameter name="action"/>
+</macro>
+
+<macro name="rest_group">
+	<n.get_parameter name="group"/>
+</macro>
+
+<macro name="rest_user_email">
+	<n.get_parameter name="user"/>
+</macro>
\ No newline at end of file