#!/bin/bash

PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

[[ ! -x `which curl` ]] && echo install curl first && exit 1
[[ ! -x `which dos2unix` ]] && echo install dos2unix first && exit 1

webhook={{slack_webhook_sev3}}
#webhook_icon_url=

[[ -z $2 ]] && echo username and message body ? && exit 1
username="$1"
body="$2"

# owned by root vs user (e.g. zabbix) might bring permission issues
tmpfile=`mktemp`
echo "$body" > $tmpfile
dos2unix $tmpfile

# self-verbose
echo -n sending webhook ...
curl -fsSX POST -H 'Content-type: application/json' \
        -d "{ \"text\": \"\`\`\`
`cat $tmpfile`
\`\`\`\", \"username\": \"$username\" }" $webhook; echo

  #"channel": "$webhook_channel",
  #"icon_url": "$webhook_icon_url",