#!/usr/bin/perl

## Licensed under the standard BSD license:

# Copyright (c) 2002-2011 CrossWire Bible Society <http://www.crosswire.org/>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
#     * Redistributions of source code must retain the above copyright
#        notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above copyright
#       notice, this list of conditions and the following disclaimer in
#       the documentation and/or other materials provided with the
#       distribution.
#     * Neither the name of the CrossWire Bible Society nor the names of
#       its contributors may be used to endorse or promote products
#       derived from this software without specific prior written
#       permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
# IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

## For general inquiries, comments, suggestions, bug reports, etc. email:
## sword-support@crosswire.org

#########################################################################
use XML::LibXML;
use strict;
use Unicode::UCD 'charinfo';
binmode (STDOUT,":utf8");

## Obtain arguments
if (scalar(@ARGV) < 1) {
    print "\ncharmap.pl <osisfile> [-o outputfile]\n\n"; 
    print "- prints a list of characters in text nodes of an OSIS file, ignoring tags etc\n";
    print "- Arguments in braces < > are required. Arguments in brackets [ ] are optional.\n";
    print "- If no -o option is specified the output goes to <STDOUT>.\n";
    exit (-1);
}

my $file = @ARGV[0];
my $outputFilename;
my %list;

if (@ARGV[1] eq "-o") {
    $outputFilename = "@ARGV[2]";
    open (OUTF , ">:utf8", "$outputFilename") or die "Could not open file @ARGV[2] for writing.";
    select(OUTF);
}

## Initialise OSIS file

my $parser = XML::LibXML->new();
my $doc = $parser->parse_file($file);

# count out the characters in text nodes only

&text_nodes($doc);

# print results

foreach my $key(sort keys %list) {
  my $c;
  if ($key =~ /\p{Cc}/) { $c = " "}
  else { $c = $key }
  
  my $ci = charinfo(ord($key)); 
        
  print "\t".$c."\tU+".$ci->{'code'}."\t".$list{$key}."\t".$ci->{'script'}."\t".$ci->{'name'}."\n";
  }

##########################################

sub text_nodes(){
    my $node = @_[0];
    if ($node->nodeType==XML_TEXT_NODE) {
        my $text  = $node->toString();
        &addTextToCounter($text);
    }
    else { 
        my @children = $node->childNodes();
        foreach (@children) {
            &text_nodes($_);
        }
    }
} 

###########################################

sub addTextToCounter() {
  my @complete = split(//,@_[0]);

  foreach (@complete) {
    my $char=$_;
    $list{$char}++;
  }
}       
