rename.sh

#!/bin/bash

replace_spaces() {
    sed "s|[ ]\{1,\}|_|g"  <<< "${1}"
}

remove_misc() {
    echo "$1" | \
        sed \
            -e "s|'||g" \
            -e "s|\.\{2,\}|_|g" \
            -e "s|,||g" \
            -e "s|\._|-|g" \
            -e "s|\.-|-|g" \
            -e "s|-\.|\.|g" \
            -e "s|_\.|\.|g" \
            -e "s|=|_|g" \
            -e "s|&|_|g" \
            -e "s|!||g" \
            -e "s|(||g" \
            -e "s|)||g" \
            -e "s|\[||g" \
            -e "s|\]||g" \
            -e "s|{||g" \
            -e "s|}||g" \
            -e "s|~||g" \
            -e "s|-_|-|g" \
            -e "s|_-|-|g" \
            -e "s|- |-|g" \
            -e "s| -|-|g" \
            -e "s|--|-|g" \
            -e "s|\:|-|g" | \
        sed -e 's|[_]\{2,\}|_|g'
}

remove_custom() {
    sed "s|${2}||g" <<< "${1}"
}

lowercase() {
    tr '[:upper:]' '[:lower:]' <<< "${1}"
}

numbering() {
    grep -q '^[0-9][0-9][_\.]' <<< "${1}" && \
        sed "s|^\([0-9][0-9]\).\(.*\)|\1-\2|" <<< "${1}" || \
        echo "$1"
}

extension() {
    grep -q -e 'mp3$' -e 'ogg$' <<< "${1}" && \
        sed "s|^\(.*\)[-_]\([a-zA-Z0-9]\{3,3\}\)$|\1\.\2|" <<< "${1}" || \
        echo "$1"
}

remove_artist() {
    artist=$(basename `pwd`)
    grep -q -e "^${artist}" <<< "${1}" && \
    sed "s|^${artist}||" <<< "${1}" || \
    echo "$1"
}

guess_title() {
    title=$(id3info $1 | grep TIT2 | cut -d':' -f2)
    [[ ! -z ${title} ]] && \
        sed "s|^\(.*\)\.\([a-zA-Z0-9]\{3,3\}\)$|\1-${title}\.\2|" <<< "${2}" || \
        echo "$2"
}

create_m3u() {
    [ ! -d "${1}" ] && return 1
    cd "${1}"
    find ./ -type f -name '*.mp3' -o -name '*.ogg' | sed 's|^\./||' | sort > 00-album.m3u
    cd - &>/dev/null
}


find ./ -mindepth 1 -maxdepth 1 | while read entry; do
    entry=`sed 's|^\./||' <<< "${entry}"`
    [ "${entry}" = "" ] && continue
    newentry="${entry}"
    [ "$1" != "" ] && newentry=`remove_custom "${newentry}" "$1"`
    [ "$2" != "" ] && newentry=`remove_custom "${newentry}" "$2"`
    newentry=`remove_misc "${newentry}"`
    newentry=`lowercase "${newentry}"`
    newentry=`replace_spaces "${newentry}"`
    [ -f "${entry}" ] && newentry=`numbering "${newentry}"`
    [ -f "${entry}" ] && newentry=`extension "${newentry}"`
    [ -d "${entry}" ] && newentry=`remove_artist "${newentry}"`
    [[ $(wc -c <<< "${entry}") -le 7 ]] && newentry=`guess_title "${entry}" "${newentry}"`
    if [[ "${entry}" != "${newentry}" && ! -z ${newentry} ]]; then
        echo "${entry} -> ${newentry}"
        mv -- "${entry}" "${newentry}"
    fi
done

# change perms
find ./ -type d -exec chmod 755 {} \;
find ./ -type f -exec chmod 644 {} \;