sexy logging for shell scripts

msg

#!/bin/sh

msg()
{
  tstamp()
  {
    tput setaf 7;
    date "+%d.%m.%Y %T.%N %Z";
    tput sgr0
  };
  speak()
  {
    printf "\\n(%s)\\t%s\\n\\t\\t[ %s ]\\n\\n" "$_FACT_" "$(tstamp)" "$@"
  };
  _FACT_="$1";
  shift;
  case "$_FACT_" in
    d | D | debug | DEBUG)
      _FACT_="DEBUG";
      tput setaf 5
      ;;
    e | E | err | ERR)
      _FACT_="ERR";
      tput setaf 1
      ;;
    i | I | info | INFO)
      _FACT_="INFO";
      tput setaf 6
      ;;
    o | O | ok | OK)
      _FACT_="OK";
      tput setaf 2
      ;;
    w | W | warn | WARN)
      _FACT_="WARN";
      tput setaf 3
      ;;
    *)
      _FACT_="MAN";
      tput setaf 6
      ;;
  esac;
  case "$_FACT_" in
    DEBUG)
      if [ "$DEBUG" != 0 ] && [ ! -z "$DEBUG" ]; then
        speak "$@";
      fi
      ;;
    MAN)
      speak "usage: msg KIND(DEBUG,ERR,INFO,OK,WARN) MESSAGE"
      ;;
    *)
      speak "$@"
      ;;
  esac;
  tput sgr0
}

# tests
case "$1" in
  t|T|test|TEST)

    msg info "start of test suite!"

    echo "debug no"
    DEBUG=0
    msg debug "debug message that will be not printed"
    echo "debug yes"
    DEBUG=1
    msg debug "debug message that will be printed"

    msg e "not good :("
    msg I "time to sleep?"
    msg ok "all good :)"
    msg WARN "hold up!"

    ;;
esac

msg ok "msg is loaded"