#!/bin/bash
#
# orpheus by Stefan Tomanek <stefan.tomanek@wertarbyte.de>
#              http://wertarbyte.de/tartarus.shtml
#
# This script pulls single files from the backup archives
# It uses list files generated by tartarus to find the archive
# containing the most recent version of a file
#
# WARNING This is still highly experimental!

CONFIG=$1
REQUEST=$2

. $CONFIG

function decrypt() {
    FILE=$1
    [[ "$FILE" =~ '\.gpg($|\.)' ]] && gpg --decrypt || cat
}
function extract() {
    FILE=$1
    [[ "$FILE" =~ '\.tar\.bz2($|\.)' ]] && (tar tfvj - ".${REQUEST/#\//./}"; return)
    [[ "$FILE" =~ '\.tar\.gz($|\.)' ]] && (tar tfvz - "${REQUEST/#\//./}"; return)
    [[ "$FILE" =~ '\.afio\.bz2($|\.)' ]] && (afio -P bzip2 -Z -y "$REQUEST" -v -t -; return)
    [[ "$FILE" =~ '\.afio\.gz($|\.)' ]] && (afio -P -y "$REQUEST" -v -t -; return)
    return 1
}

function detectProperties() {
    FILE=$1

    echo "Processing $FILE" >&2
    echo $FILE | (
        IFS=. read -a PROPS
        for PROP in ${PROPS[*]}; do
            case $PROP in
                afio)
                    echo "* afio archive" >&2
                ;;
                tar)
                    echo "* tar archive" >&2
                ;;
                bz2)
                    echo "* bzip2 compressed" >&2
                ;;
                gz)
                    echo "* gzip compressed" >&2
                ;;
                gpg)
                    echo "* gpg encrypted" >&2
                ;;
            esac
        done
    )
}

ARCHIVES=$(curl -s -u ${STORAGE_FTP_USER}:${STORAGE_FTP_PASSWORD} --ftp-ssl -k ftp://${STORAGE_FTP_SERVER}/${STORAGE_FTP_DIR} -l)

awk -vREQUEST="$REQUEST" '
    substr($11,2) == REQUEST {
        n=split(FILENAME, T, "/");
        LISTNAME=T[n];
        split(LISTNAME, A, ".");
        PROFILE=A[1];
        DATE=A[2];
        print PROFILE, DATE, substr($11,2);
    }' "${FILE_LIST_DIRECTORY}"/*.[[:digit:]][[:digit:]][[:digit:]][[:digit:]][[:digit:]][[:digit:]][[:digit:]][[:digit:]]-[[:digit:]][[:digit:]][[:digit:]][[:digit:]].list | \
    sort -r | head -n1 | \

    while read PROFILE DATE FILENAME; do
        NEEDED=$(echo "$ARCHIVES" | grep "^tartarus-${PROFILE}-${DATE}[.-]")
        # FIXME&TODO Detect archive format, encryption and compression
        URLS=""
        for F in $NEEDED; do
            URLS="$URLS ftp://${STORAGE_FTP_SERVER}/${STORAGE_FTP_DIR}/${F}"
        done
        echo "Downloading: $URLS" >&2
        detectProperties $NEEDED
        curl -s -u ${STORAGE_FTP_USER}:${STORAGE_FTP_PASSWORD} --ftp-ssl -k $URLS | \
        decrypt $NEEDED | extract $NEEDED
    done