A script that helps to switch [Matrix] notifications for a room to "mentions only" mode from CLI

matrix-room-notifications-mentions-only.sh

#!/usr/bin/env bash
#
# A script that helps to switch [Matrix] notifications for a room
# to "mentions only" mode from CLI.
#
# Author: Viacheslav Lotsmanov
# License: Public Domain
#

set -e
ec() { printf '%s' "$1"; }

echo -n 'Enter server (keep empty for "matrix.org"): ' && read server
if [[ -z $server ]]; then
	server=matrix.org
elif ec "$server" | grep -vP '^[a-z0-9.]+$' >/dev/null; then
	echo 'Entered server is incorrect!' >&2
	exit 1
fi

echo -n 'Enter auth token: ' && read token
[[ -z $token ]] && (echo 'Entered auth token is empty!' >&2; exit 1)
(ec "$token" | grep -P '^[a-zA-Z0-9+/=_-]+$' >/dev/null) || \
	(echo 'Entered auth token is incorrect!' >&2; exit 1)

echo -n 'Enter room internal id: ' && read room
[[ -z $room ]] && (echo 'Entered room internal id is empty!' >&2; exit 1)
(ec "$room" | grep -P '^![a-zA-Z]+:[a-z0-9.]+$' >/dev/null) || \
	(echo 'Entered room id is incorrect!' >&2; exit 1)

export CURLOPT_HTTP_VERSION=CURL_HTTP_VERSION_2_0

echo "Enabling push rules for room $room…"
curl -XPUT \
	-H 'Content-Type: application/json' \
	-H "Authorization: Bearer $token" \
	--data '{"enabled":true}' \
	"https://$server/_matrix/client/r0/pushrules/global/room/$room/enabled"

echo $"\"Mentions only\" notifications mode for room $room…"
curl -XPUT \
	-H 'Content-Type: application/json' \
	-H "Authorization: Bearer $token" \
	--data '{"actions":["dont_notify"]}' \
	"https://$server/_matrix/client/r0/pushrules/global/room/$room"