#!/bin/bash

if [ -z "$1" -o ! -d "$1" ]; then
    echo "Usage: $0 <top-directory> [<days ago>]" 1>&2
    exit 1
fi

top="${1}"
shift

source "${top}/etc/settings.sh"
tmp="$(mktemp -d)"
cd "${tmp}"

server="http://www.dilbert.com"
webaddress="$server/strips/$(date -d"$daysago days ago" +%Y-%m-%d)/index.html"
browser="Mozilla/4.06 [en] (X11; I; Linux 2.0.35 i586)"
newn="${day}.gif"

wget ${wget_args} --user-agent="$browser" "$webaddress"

if [ -s index.html ]; then
    nomen=$(grep -A1 "strips/comic/$(date -d"$daysago days ago" -I)" index.html | \
            sed -n 's#.*<img.*src="\(http://[^"]\+\)".*#\1#p' | tail -1)
    gifname=$(sed 's#.*/\([^/]\+\)$#\1#' <<< $nomen)

    if [ -n "${nomen}" ]; then
        echo "Dateiname: $gifname"
        echo
        echo "Hole dilbert von $nomen"
        echo "fuer Datum: $(date -d"$daysago days ago" -I)"
        echo
        wget ${wget_args} --user-agent="$browser" "$nomen"

        if [ -s "${tmp}/${gifname}" ]; then
            mv "${tmp}/${gifname}" "${image_dir}/$newn"
            rm -f "${comic_dir}/latest.gif"
            ln -s "${image_offset}/$newn" "${comic_dir}/latest.gif"
        fi
    fi
fi

rm -rf "${tmp}"