#!/bin/sh

set -e

init_error ()
{
    exit 1
}

# Source debconf library
. /usr/share/debconf/confmodule

DEBUG=false

db_get mldonkey-server/launch_at_startup
launch_at_startup="$RET"

case "$1" in
    configure)

    CONF=/etc/default/mldonkey-server

    ##################
    # Default values #
    ##################

    mldonkey_umask=0022
    run_as_user=mldonkey
    mldonkey_group=mldonkey
    new_mldonkey_dir="/var/lib/mldonkey"
    client_name=`hostname`

    if [ -r "$CONF" ]; then
        . $CONF;
        if [ -n "$MLDONKEY_USER" ]; then
             run_as_user="$MLDONKEY_USER";
        fi
        if [ -n "$MLDONKEY_GROUP" ]; then
             mldonkey_group="$MLDONKEY_GROUP";
        fi
        if [ -n "$MLDONKEY_DIR" ]; then
             new_mldonkey_dir="$MLDONKEY_DIR";
        fi
        if [ -n "$MLDONKEY_UMASK" ]; then
             mldonkey_umask="$MLDONKEY_UMASK";
        fi
    fi
    umask $mldonkey_umask

    ###################
    # User management #
    ###################

    # Creating MLDonkey group if it isn't already there
    if ! getent group $mldonkey_group > /dev/null ; then
        $DEBUG && echo -n "Creating mldonkey group: "
        addgroup --system --quiet $mldonkey_group
        $DEBUG && echo "done."
    fi

    # Creating MLDonkey user if it isn't already there
    if ! getent passwd $run_as_user > /dev/null ; then
        $DEBUG && echo -n "Creating mldonkey user: "
        adduser --quiet --system --ingroup $mldonkey_group \
        --home "$new_mldonkey_dir" --no-create-home $run_as_user
        $DEBUG && echo "done."
    fi

    run_as_useruid=`id -u $run_as_user`

    if [ ! -d $new_mldonkey_dir ]; then
        $DEBUG && echo -n "Creating mldonkey home directory: "
        mkdir "$new_mldonkey_dir"
        $DEBUG && echo "done."
    fi

    #################
    # Downloads.ini #
    #################

    if [ ! -e "$new_mldonkey_dir/downloads.ini" ]; then
        $DEBUG && echo -n "Creating a new $new_mldonkey_dir/downloads.ini: "
        touch "$new_mldonkey_dir/downloads.ini"
	cat > "$new_mldonkey_dir/downloads.ini" <<EOF
run_as_useruid=$run_as_useruid
run_as_user="$run_as_user"
client_name="$client_name"
EOF
        $DEBUG && echo "done."
    fi

    #############
    # Files.ini #
    #############

    # Handling fasttrack file split here, better than in the mldonkey-server.init

    if [ -e "$new_mldonkey_dir/files.ini" ] \
        && [ ! -e "$new_mldonkey_dir/files.ini.fasttrack" ] \
        && /usr/lib/mldonkey/mldonkey_files --test Fasttrack -q -f0 "$new_mldonkey_dir/files.ini"; then
        echo "Correction of the Fasttrack problem (see /usr/share/doc/mldonkey-server/README.Debian)"
        echo -n "Splitting $new_mldonkey_dir/files.ini (backup in $new_mldonkey_dir/files.ini.fasttrack): "
        /usr/lib/mldonkey/mldonkey_files --split Fasttrack -f0 "$new_mldonkey_dir/files.ini" \
        -f1 "$new_mldonkey_dir/files.ini.fasttrack" \
        -f2 "$new_mldonkey_dir/files.ini"
        echo "done."
    fi

    ####################
    # Files permission #
    ####################

    for file in \
        "$new_mldonkey_dir"  \
        "/var/run/mldonkey" \
        "/var/log/mldonkey" \
        "$new_mldonkey_dir/downloads.ini" \
        "$new_mldonkey_dir/downloads.ini.dpkg" \
        "$new_mldonkey_dir/downloads.ini.old" \
        "$new_mldonkey_dir/downloads.ini.tmp" \
        "$new_mldonkey_dir/files.ini" \
        "$new_mldonkey_dir/files.ini.fasttrack"; do
        $DEBUG && echo -n "Changing owner and file permission of $file: "
        if ! dpkg-statoverride --list "$file" >/dev/null; then
            # BUG: cf dpkg-statoverride above
            if [ -e "$file" ]; then
                chown -R $run_as_user:$mldonkey_group $file
                $DEBUG && echo "done."
            else
                $DEBUG && echo "$file doesn't exist."
            fi
        else
            $DEBUG && echo "$file is listed in dpkg-statoverride."
        fi
    done

    for file in \
        "$new_mldonkey_dir/users.ini" \
        "$new_mldonkey_dir/users.ini.dpkg" \
        "$new_mldonkey_dir/users.ini.old" \
        "$new_mldonkey_dir/users.ini.tmp"; do
        $DEBUG && echo -n "Changing owner and file permission of $file: "
        if ! dpkg-statoverride --list "$file" >/dev/null; then
            # BUG: cf dpkg-statoverride above
            if [ -e "$file" ]; then
                chown $run_as_user:$mldonkey_group "$file"
                chmod 0600 "$file"
                $DEBUG && echo "done."
            else
                $DEBUG && echo "$file doesn't exist."
            fi
        else
            $DEBUG && echo "$file is listed in dpkg-statoverride."
        fi
    done

    ################################
    # /etc/default/mldonkey-server #
    ################################

    CONF_NEW=`tempfile`
    $DEBUG && echo -n "Writing new values to $CONF_NEW: "

    cat > "$CONF_NEW" <<EOF
# MLDonkey configuration file
# This file is loaded by /etc/init.d/mldonkey-server.
# This file is managed using ucf(1).

MLDONKEY_DIR=$new_mldonkey_dir
MLDONKEY_USER=$run_as_user
MLDONKEY_GROUP=$mldonkey_group
MLDONKEY_UMASK=$mldonkey_umask
LAUNCH_AT_STARTUP=$launch_at_startup
EOF

        ucf --debconf-ok "$CONF_NEW" "$CONF"

        $DEBUG && echo "done."
        ;;

        abort-upgrade|abort-remove|abort-deconfigure)
        ;;

        *)
        echo "postinst called with unknown argument \`$1'" >&2
        exit 1
        ;;
    esac

db_stop

# Automatically added by dh_installinit/13.2
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
	if [ -x "/etc/init.d/mldonkey-server" ]; then
		update-rc.d mldonkey-server start 98 2 3 4 5 . stop 20 0 1 6 . >/dev/null
		if [ -n "$2" ]; then
			_dh_action=restart
		else
			_dh_action=start
		fi
		invoke-rc.d --skip-systemd-native mldonkey-server $_dh_action || init_error
	fi
fi
# End automatically added section