#!/usr/bin/mawk -We
# *********************************************************************
#  Written by and copyright Carlo Strozzi <carlos@linux.it>.
#
#  listtotable: converts from a properly-formatted list into a
#	        NoSQL table.
#  Copyright (C) 1998-2003 Carlo Strozzi <carlos@linux.it>
#
#  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: listtotable,v 1.2 2003/03/17 10:10:46 carlo Exp $

BEGIN {
  NULL = ""; 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] == "-n" || ARGV[i] == "--no-chomp") nochomp = 1
     else if (ARGV[i] == "-t" || ARGV[i] == "--trim") trim = 1
     else 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] == "-s" || ARGV[i] == "--skip") {
	s_flag = 1
	skip_re = ARGV[++i]
     }
     else if (ARGV[i] == "-h" || ARGV[i] == "--help") {
	system("grep -v '^#' " nosql_install "/help/listtotable.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 }
}

s_flag && $0 ~ skip_re { NR--; next }		# Handle '-s' option.

NR == 1 { next }

/^[A-Za-z_]/ && got_header == 0 {
  if (trim) { sub(/^ +/, NULL, $1); sub(/ +$/, NULL, $1) }
  header == NULL ? header = $1 : header = header OFS $1
}

{ r_length = length($0) }

r_length {
  if (/^[A-Za-z_]/) {
    # This is a field name.
    # Remove field name. This _must_ be done in two steps !!
    sub(/^[^ \t]+/, NULL)
    sub(/^[ \t]/, NULL)

    if (trim) { sub(/^ +/, NULL); sub(/ +$/, NULL) }

    # Escape any '\t' characters in the data.
    gsub(/\t/, "\\t")

    out_rec = out_rec OFS $0

  } else {

    # This is a continuation line.

    # Remove the leading \t inserted by 'tabletolist' on
    # continuation lines, unless explicitly requested not to do so.
    if (!nochomp) sub(/^\t/, NULL)

    # Escape any other '\t' characters in the data.
    gsub(/\t/, "\\t")

    # Preserve output formatting by inserting an escaped newline '\n'.
    out_rec = out_rec "\\n" $0 
  }
}

!r_length {
  if (!got_header) {
    got_header = 1

    # Remove possible extra trailing tab from out_rec.
    sub(/\t$/, NULL, header)

    # Print header.
    printf("\001"); gsub(/\t/,"\t\001",header); print header > o_file
  }

  # Remove possible extra leading tab from out_rec.
  sub(/^\t/, NULL, out_rec)

  # print out_rec unless it contains only tabs.
  if (out_rec !~ /^\t+$/) print out_rec > o_file

  out_rec = NULL
}

# EOF
