#!/bin/bash

function post_to_slack () {
  SLACK_MESSAGE="$1"
  SLACK_URL=https://hooks.slack.com/services/YOUR_WEBHOOK_TOKENS_HERE

  case "$2" in
    INFO)
      SLACK_ICON=':slack:'
      ;;
    WARNING)
      SLACK_ICON=':warning:'
      ;;
    ERROR)
      SLACK_ICON=':bangbang:'
      ;;
    *)
      SLACK_ICON=':slack:'
      ;;
  esac

  curl -X POST --data "payload={\"icon_emoji\": \"$SLACK_ICON\", \"channel\": \"$3\", \"text\": \"$SLACK_MESSAGE\"}" ${SLACK_URL}
}

ZOMBIE_COUNT=`ps u -C zombie --no-headers | wc -l`

if (( $ZOMBIE_COUNT > 0 )); then
  ZOMBIE_LIST=`ps u -C zombie`
  HOSTNAME=`cat /etc/hostname`
  post_to_slack "Hi, There are $ZOMBIE_COUNT zombie processes on \`$HOSTNAME\`. Please, check! \\n\`\`\`$ZOMBIE_LIST\`\`\` " "WARNING" "#your_channel"
fi

exit 0