#!/usr/bin/mawk -We
# *********************************************************************
# addrow: append a new empty record to a NoSQL table.
# Copyright (c) 2000,2001,2002,2003 Carlo Strozzi
#
# 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, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
# *********************************************************************
#  $Id: addrow,v 1.3 2003/10/09 10:53:30 carlo Exp $

BEGIN {
  NULL = ""; FS = OFS = "\t"

  # Get local settings.
  nosql_install = ENVIRON["NOSQL_INSTALL"]
  stdout = ENVIRON["NOSQL_STDOUT"]
  stderr = ENVIRON["NOSQL_STDERR"]

  # Set default values if necessary.
  if (nosql_install == NULL) nosql_install = "/usr/local/nosql"
  if (stdout == NULL) stdout = "/dev/stdout"
  if (stderr == NULL) stderr = "/dev/stderr"

  while (ARGV[++i] != NULL) {
     if (ARGV[i] == "-i" || ARGV[i] == "--input") i_file = ARGV[++i]
     else if (ARGV[i] == "-o" || ARGV[i] == "--output") o_file = ARGV[++i]
     else if (ARGV[i] == "-p" || ARGV[i] == "--prime") prime = 1
     else if (ARGV[i] == "-H" || ARGV[i] == "--highlight") hilite = 1
     else if (ARGV[i] == "-N" || ARGV[i] == "--no-header") no_hdr = 1
     else if (ARGV[i] == "-K" || ARGV[i] == "--key") {
	key_value = ARGV[++i]
        # Escape special characters in key value.
        gsub(/\t/, "\\t", key_value)
        gsub(/\n/, "\\n", key_value)
     }
     else if (ARGV[i] == "-c" || ARGV[i] == "--conditional") cond = 1
     else if (ARGV[i] == "-d" || ARGV[i] == "--delete") d_string = "..DEL.."
     else if (ARGV[i] ~ /^--delete=/) d_string = substr(ARGV[i],10)
     else if (ARGV[i] == "-h" || ARGV[i] == "--help") {
	system("grep -v '^#' " nosql_install "/help/addrow.txt")
	rc = 1
	exit(rc)
     }
  }

  ARGC = 1					# Fix argv[]

  if (o_file == NULL) o_file = stdout
  if (i_file != NULL) { ARGV[1] = i_file; ARGC = 2 }
}

#
# Main loop
#

NR == 1 {
   if (!no_hdr) print > o_file
   next
}

NR > 1 {
   if (!prime) print > o_file
   if ($1 == key_value) found = 1
}

END {
   if (rc) exit(rc)

   if (hilite) gsub(/[^\t]/, "#")
   else gsub(/[^\t]/, "")

   if (key_value != NULL) $1 = key_value
   if (d_string != NULL) $2 = d_string
   if (prime) {
      print > o_file
      exit
   }
   if (cond && found) exit
   print > o_file
}

#
# End of program.
#
