#!/bin/bash

# doc print_meta_flac {
#
# DESCRIPTION
#   print_meta_flac - Prints metadata of remote flac in FIELD=VALUE; format.
#
# USAGE
#   print_meta_flac </path/to/flac> [<field_1> <field_2> <...>]
#
# }

print_meta_flac() {
    local FILE="${1}"; shift
    local tagList=(${@})
    [[ ! -f ${FILE} ]] && return 1
    
    local METADATA=$(awk 'BEGIN{FS=": ";ORS=";"}{if($1 ~ /comment\[/){print $2}}' <<< $(metaflac --list --block-type=VORBIS_COMMENT "${FILE}"))
    if [[ -z "${tagList[@]}" ]]; then
        echo -n ${METADATA} | sed 's|.$||'
    else
        for tag in ${tagList[@]}; do
            local SEL_METADATA="${SEL_METADATA}$(awk -v tag=${tag} 'BEGIN{FS="=";RS=";";ORS=";"}{if($1==tag){print $0}}' <<< ${METADATA})"
        done
        echo -n "${SEL_METADATA}" |  sed 's|.$||'
    fi

}