slack_notification_from_bash

# ==[ printSlack ]=============================================================
# Function to send output from the commandline to Slack.
#
# @parameter string $LEVEL   INFO/ERROR/WARNING message. Changes emoji
# @parameter string $MESSAGE Message to send to slack. 
printSlack()
{
  SLACK_HOSTNAME=${SLACK_HOSTNAME-'oops.slack.com'};
  SLACK_TOKEN=${SLACK_TOKEN-'oops'};
  SLACK_CHANNEL=${SLACK_CHANNEL-'#devops'};
  SLACK_BOTNAME=${SLACK_BOTNAME-$(hostname -s)};
  SLACK_BOTEMOJI=${SLACK_BOTEMOJI-':computer:'}

  SEVERITY=${1-'INFO'};
  ICON=':slack:';

  case "$SEVERITY" in
    INFO)
      ICON=':page_with_curl:';
      shift;
      ;;
    WARN|WARNING)
      ICON=':warning:';
      shift;
      ;;
    ERROR|ERR)
      ICON=':bangbang:';
      shift;
      ;;
    *)
      ICON=':slack:';
      ;;
  esac

  MESSAGE=$@;

  PAYLOAD="payload={\"channel\": \"${SLACK_CHANNEL}\", \"username\": \"${SLACK_BOTNAME}\", \"text\": \"${ICON} ${MESSAGE}\", \"icon_emoji\": \"${SLACK_BOTEMOJI}\"}";
  CURL_RESULT=$(curl -s -S -X POST --data-urlencode "$PAYLOAD" https://${SLACK_HOSTNAME}/services/hooks/incoming-webhook?token=${SLACK_TOKEN});

  if [ -z "$CURL_RESULT" ]; then
    return 0;
  else
    return 1;
  fi

}