#!/bin/bash

# doc gen_tracks {
# 
# DESCRIPTION
#   gen_tracks - Splits specified image into multiple files using a text file 
#   formatted under the CUE specification
#
# USAGE
#   gen_tracks </path/to/git/dir> </path/to/image> </path/to/cue/file>
#
# }

gen_tracks() {
    local GITDIR="${1}"
    local IMAGE="${2}"
    local CUE="${3}"

    ## breakpointList generator
    # Generates list with cuebreakpoints utility
    local breakpointList=($(print_breakpoints "${CUE}" ))

    # In the event that breakpointList is empty because image represents only one track, 
    # no split occurs, and returns a 0.
    [[ -z "${breakpointList[@]}" ]] && { cat "${IMAGE}" > ${GITDIR}/split-track01.flac; return 0; }
    
    # Attempts first split. If fails because of lack of CD quality file, retries with modified breakpointList
    if ! printf '%s\n' ${breakpointList[@]} | shntool split -o flac -O always -d "${GITDIR}" "${IMAGE}" ; then 
        printf '%s\n' ${breakpointList[@]} | sed s/$/0/ | shntool split -o flac -O always -d "${GITDIR}" "${IMAGE}" 
        [[ $? -ne 0 ]] && return 1 || return 0
    fi

}