#!/bin/bash

# This file is part of the PyOWS-WMS-Server package (= program).
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# author(s): Sebastian Holler <shgeo/at/online.de>
#
# Copyright (c)2008 by Sebastian Holler


# for document references, used in this source code: see <README_dev>

# use: listing all vector and raster layers from the current location
# run this script in GRASS environment !!

LD_checkLocationAccess ()
{
  if touch "$LOCATION/testfile_${PYWMS_TMP_PREFIX}$$" 2>/dev/null ; then
    rm "$LOCATION/testfile_${PYWMS_TMP_PREFIX}$$"
    return 0
  else
    return -1
  fi
}


LD_checkName ()
{
  # filter directory names with the following special characters:
  #: *+?,@#:;<space>
  if [ $(echo $1 | grep '[\*\+\?\,\@\#\:\;\ ]') ]; then
    return -1
  else
    return 0
  fi
}


LD_checkMapsetName ()
{
  # see LD_checkName; additional:
  # filter temporary mapsets, created by the WMS server
  if [[ $(echo $1 | grep '[\*\+\?\,\@\#\:\;\ ]') || \
        $(echo $1 | grep "${PYWMS_TMP_PREFIX}") ]]; then
    return -1
  else
    return 0
  fi
}


if [ -z "$GISBASE" ] ; then
    echo "You must be in GRASS GIS to run this program." 1>&2
    return -1
fi

GISDBASE=$(g.gisenv GISDBASE)

# set IFS due to possible space characters in file names:
ORIG_IFS=$IFS
IFS="
"

# if DEFAULT_WIND in mapset PERMANENT is found, and the remote user has
# write access in this directory, it is supposed to be a valid GRASS LOCATION
if [ -f "${LOCATION}/PERMANENT/DEFAULT_WIND" ] && \
   LD_checkName ${LOCATION} && LD_checkLocationAccess ; then
     for LD_GRASSMSET in $(find $LOCATION -mindepth 1 \
                           -maxdepth 1 -type d -printf %f\\n 2>/dev/null)
     do
       if [ -f "${LOCATION}/$LD_GRASSMSET/WIND" ] && \
          LD_checkMapsetName ${LD_GRASSMSET}; then
  echo ${LD_GRASSMSET}
  for LD_GRASSLYR in $(find ${LOCATION}/${LD_GRASSMSET}/vector \
                 -mindepth 1 -maxdepth 1 -type d -printf %f\\n 2>/dev/null)
         do
           if [ -f "${LOCATION}/$LD_GRASSMSET/vector/\
${LD_GRASSLYR}/head" ] && LD_checkName ${LD_GRASSLYR}; then
             echo "v.${LD_GRASSLYR}@${LD_GRASSMSET}"
           fi
         done
  for LD_GRASSLYR in \
             $(find ${LOCATION}/${LD_GRASSMSET}/cell \
        -mindepth 1 -maxdepth 1 -type f -printf %f\\n 2>/dev/null)
         do
           if [ -f "${LOCATION}/$LD_GRASSMSET/cellhd/\
${LD_GRASSLYR}" ] && LD_checkName ${LD_GRASSLYR}; then
             echo "r.${LD_GRASSLYR}@${LD_GRASSMSET}"
           fi
         done
       fi
     done
else
  # print error message
  echo "location $LOCATION is not usable (invalid / not accessible?)." 1>&2
fi

IFS=$ORIG_IFS