Sends a message to a room using webhook on Hangouts Chat

send-to-room.sh

#!/usr/bin/env sh
#
# Envia uma mensagem pro canal de Tecnologia no Hangouts Chat.

set -e

if [ ! -z "$DEBUG" ]
then
	set -x
fi

APP_NAME=$(basename "$0")
CHAT_MESSAGE=${1:-""}
WEBHOOK_URL=${2:-""}

send_message()
{
	message="${1}"
	chat_url="${2}"

	curl -X POST \
		-H "Content-Type: application/json; charset=UTF-8" \
		-d "{\"text\": \"${message}\"}" \
		"${chat_url}"
	return $?
}

display_help()
{
	cat <<-EOT
	Usage: $APP_NAME <message> [webhook url]
	EOT
}

if [ "$1" = "-h" ] || [ "$1" = "--help" ] || [ "$1" = "help" ]
then
	display_help
	exit 0
fi

if [ "$1" = "-v" ] || [ "$1" = "--version" ] || [ "$1" = "version" ]
then
	echo "$APP_NAME 1.0.0"
	exit 0
fi

if [ -z "$CHAT_MESSAGE" ]
then
	echo "Error: A message is required to be sent. Use '$APP_NAME --help' for more information." 2>&1
	exit 2
fi

send_message "$CHAT_MESSAGE" "$WEBHOOK_URL"
# vim: ft=sh sw=4 ts=4 ai noet: