logger

#!/usr/bin/env bash
set -eu

#######################################
# Function:
# Parameters:
#   $1: message type
#   $2: message
# Output:
#   Colored string
#######################################
function print_usage() {
    echo 'Usage:'
    echo '    logger -p [type] [message...]'
    echo "    -p prefixed output"
    echo '    [type] = info / warn / ok / error / tip / debug'
    echo ''
    echo "Examples:"
    echo "    logger info 'hello world!'"
}

#######################################
# flags

declare add_prefix='false'
declare option
while getopts ph option; do
    case $option in
        p) add_prefix='true' ;;
        h) print_usage; exit 0; ;;
        *) print_usage; exit 1; ;;
    esac
done
shift $((OPTIND - 1))

#######################################

utils_dir="$(cd "$(dirname "$0")"; pwd)"
declare -r utils_dir
if echo "$PATH" | grep -v "$utils_dir" &> /dev/null; then
    export PATH="$utils_dir:$PATH"
fi

if [[ $# == 0 ]] || [[ $# == 1 && ! -p /dev/stdin ]]; then
    color_print -np 'error' 'Incorrect number of parameters.'
    print_usage
    exit 1;
fi

if [[ -p /dev/stdin ]]; then    # <-- make pipe work
    str=$(cat -)                # <-- make pipe work
else
    str="${*:2}"
fi
declare -r str

color_print "$1" "[$(date "+%Y/%m/%d %H:%M:%S")] "
if [[ $add_prefix == 'true' ]]; then
    color_print -np "$1" "$str"
else
    color_print -n "$1" "$str"
fi