#!/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 metadata of all vector and raster layers in the mapset <stdin>
# run this script in GRASS environment!!

# input format (stdin): layer1_name layer2_name layerX_name

# output format: (list)
# layer@mapset;;format<v-p|v-l|v-a|v-u|r-i|r-f|r-d>;;title;;organization;;\
# creator;;date;;bb-Northing|LatMax;;bb-Easting|LonMax;;bb-Southing|LatMin;;
# bb-Westing|LonMin##

for PYWMS_LAYER in $(cat /dev/stdin)
do
  #echo "processing $PYWMS_LAYER" >/dev/stderr
  PYWMS_VALID="yes"
  PYWMS_TYPE=${PYWMS_LAYER:0:1}
  PYWMS_LAYER=${PYWMS_LAYER:2}
  PYWMS_PRINT="${PYWMS_LAYER};;"
  
  # [v,r].info
  PYWMS_LINFO=$(${PYWMS_TYPE}.info $PYWMS_LAYER -gt 2>/dev/null || echo "invalid")
  if [ "$PYWMS_LINFO" == "invalid" ]; then
    PYWMS_VALID="no"
    continue
  fi
  #NOTE: echo ${PYWMS_LINFO}    --> line continues get lost
  #      echo "${PYWMS_LINFO}"  --> line continues preserved
  
  if [ "$PYWMS_TYPE" == "v" ]; then
    # get the vector type and boundaries of the layer:
    # v-a:areas, v-l:lines, v-p:points, v-u:unknown
    if [ ! "$(echo "$PYWMS_LINFO" | grep "areas=" | sed 's/areas=//')" == "0" ]; then
      PYWMS_PRINT="${PYWMS_PRINT}v-a"
    elif [ ! "$(echo "$PYWMS_LINFO" | grep "lines=" | sed 's/lines=//')" == "0" ]; then
      PYWMS_PRINT="${PYWMS_PRINT}v-l"
    elif [ ! "$(echo "$PYWMS_LINFO" | grep "points=" | sed 's/points=//')" == "0" ]; then
      PYWMS_PRINT="${PYWMS_PRINT}v-p"
    else
      # if unknown vector type:
      PYWMS_VALID="no"
      continue
    fi
  else
    #raster (integer/floatingpoint/doubleprecision/3d)
    PYWMS_RTYPE=$(echo "$PYWMS_LINFO" | grep "datatype=" | sed 's/datatype=//')
    if [ "$PYWMS_RTYPE" == "CELL" ]; then
      PYWMS_PRINT="${PYWMS_PRINT}r-i"
    elif [ "$PYWMS_RTYPE" == "FCELL" ]; then
      PYWMS_PRINT="${PYWMS_PRINT}r-f"
    elif [ "$PYWMS_RTYPE" == "DCELL" ]; then
      PYWMS_PRINT="${PYWMS_PRINT}r-d"
    else
      # if unknown raster type:
      PYWMS_VALID="no"
      continue
    fi
  fi
  PYWMS_PRINT="${PYWMS_PRINT};;"
  #TODO: title;;organization;;creator;;date;;
  PYWMS_PRINT="${PYWMS_PRINT};;;;;;;;"
  PYWMS_COORD="$(echo "${PYWMS_LINFO}" | grep "north=" | sed 's/north=//')"
  PYWMS_PRINT="${PYWMS_PRINT}${PYWMS_COORD};;"
  PYWMS_COORD="$(echo "${PYWMS_LINFO}" | grep "east=" | sed 's/east=//')"
  PYWMS_PRINT="${PYWMS_PRINT}${PYWMS_COORD};;"
  PYWMS_COORD="$(echo "${PYWMS_LINFO}" | grep "south=" | sed 's/south=//')"
  PYWMS_PRINT="${PYWMS_PRINT}${PYWMS_COORD};;"
  PYWMS_COORD="$(echo "${PYWMS_LINFO}" | grep "west=" | sed 's/west=//')"
  PYWMS_PRINT="${PYWMS_PRINT}${PYWMS_COORD}"

  # if layer seems to be valid, return metadata:
  [ "${PYWMS_VALID}" == "yes" ] && echo -n "${PYWMS_PRINT}##"
done