#!/bin/bash
# libmsgmng.lib -- @package@ library to manage debug/warning/error messages
# Copyright (C) 2005,2006,2008,2012 Davide Madrisan <davide.madrisan@gmail.com>

[ "$libmsgmng_is_loaded" = 1 ] || {
libmsgmng_is_loaded=1

[ -z "$BASH" ] || [ ${BASH_VERSION:0:1} -lt 2 ] &&
   echo $"this script requires bash version 2 or better" >&2 && exit 1

if [[ -z "$LANG" && -r /etc/sysconfig/i18n ]]; then
   . /etc/sysconfig/i18n
   [ "$LANG" ] && export LANG
fi
TEXTDOMAIN="libmsgmng"; export TEXTDOMAIN

# notify family of message handling functions:
#  - notify.warning
#  - notify.error
#  - notify.debug
#  - notify.note
# args:
#    $1 : message to print
# note:
#    1. debug messages are only printed if 'verbose' is great then '0'
#    2. error notifications are followed by a call to 'EXIT_FUNC'
#       or 'exit' if this variable is unset
#       (can set to 'return' for instance)

notify_def_msg="<"$"no message"">"

function notify.warning() {
   echo -e "${WARN}WARNING${NORM}: ${1:-$notify_def_msg}" 1>&2
}

function notify.error() {
   echo -e "${EXIT}ERROR${NORM}: ${EXIT}${1:-$notify_def_msg}${NORM}" 1>&2
   ${EXIT_FUNC:-"exit"} 1
}

function notify.debug() {
   [ ${verbose:-0} -gt 1 ] || return
   echo -e "${WARN}DEBUG${NORM}: ${1:-$notify_def_msg}" 1>&2
}

function notify.note() {
   [ ${verbose:-0} -ge 0 ] || return
   echo -e "${1:-$notify_def_msg}"
}

# function notify.enable_colors
#    enable if possible the colorized output
# args:
#    none
function notify.enable_colors() {
   local colorize_theme="$1"
   # for backward compatibility
   [ "$colorize_theme" ] || colorize_theme="terminal-dark"

   case "$colorize_theme" in
      "web")
         CRIT="<font color=white style=\"background-color:red\">"
         NOTE="<font color=gold>"
         WARN="<font color=red>"
         EXIT="$CRIT"
         NORM="</font>"
      ;;
      "terminal-white")
         if [[ -t 1 && "$TERM" != raw && "$TERM" != dumb ]]; then
            ESC=$(echo -en "\033")                 # ascii ESCape
            [ "$NOTE" ] || NOTE="${ESC}[1;34m"     # switch on blu
            [ "$WARN" ] || WARN="${ESC}[1;31m"
            [ "$EXIT" ] || EXIT="${ESC}[1;31m"
            [ "$NORM" ] || NORM=$(echo -en "${ESC}[m\017")
         else
            ESC= CRIT= NOTE= WARN= EXIT= NORM=
         fi
      ;;
      "terminal-dark")
         if [[ -t 1 && "$TERM" != raw && "$TERM" != dumb ]]; then
            ESC=$(echo -en "\033")                 # ascii ESCape
            [ "$CRIT" ] || CRIT="${ESC}[1;31m"     # switch on red
            [ "$NOTE" ] || NOTE="${ESC}[1;33m"     # switch on yellow
            [ "$WARN" ] || WARN="${ESC}[1;31m"
            [ "$EXIT" ] || EXIT="${ESC}[1;31m"
            [ "$NORM" ] || NORM=$(echo -en "${ESC}[m\017")
         else
            ESC= CRIT= NOTE= WARN= EXIT= NORM=
         fi
      ;;
      *) echo \
$"unknown color theme \`$colorize_theme': colors will be disabled"
         ESC= CRIT= NOTE= WARN= EXIT= NORM=
      ;;
   esac
}

# function notify.disable_colors
#    disable the colorized output
# args:
#    none
function notify.disable_colors() {
   ESC= CRIT= NOTE= WARN= EXIT= NORM=
}

} # endif $libmsgmng_is_loaded