#!/usr/bin/perl
#--------------------------------------------------------------------
# \brief	This script is a preprocessor for PHP files to be used
#			on PHP source files before running Doxygen.
# \author	Laurent Destailleur
#--------------------------------------------------------------------
## no critic (InputOutput::RequireBriefOpen)

use strict;
use warnings;

# Usage: dolibarr-doxygen-filter.pl pathtofilefromdolibarrroot

my $file = $ARGV[0];
if ( !$file ) {
	print "Usage: dolibarr-doxygen-filter.pl pathtofilefromdolibarrroot\n";
	exit;
}

open( my $fh, "<", $file ) || die "Failed to open file $file";
while (<$fh>) {
	if ( $_ =~ /\\version\s/i ) {
		$_ =~ s/\$Id://i;
		$_ =~ s/(Exp|)\s\$$//i;
		$_ =~ s/(\\version\s+)[^\s]+\s/$1/i;
		$_ =~ s/(\w)\s(\w)/$1_$2/g;
	}
	$_ =~ s/exit\s*;/exit(0);/i;
	my $i            = 0;
	my $len          = length($_);
	my $s            = "";
	my $insidequote  = 0;
	my $insidedquote = 0;
	my $ignore       = "";

	while ( $i < $len ) {
		my $c = substr( $_, $i, 1 );
		if ( $c eq "\\" ) {
			if ($insidequote)  { $ignore = "'"; }
			if ($insidedquote) { $ignore = "\""; }
		}
		else {
			if ( $c eq "'" ) {
				if ( !$insidedquote ) {
					$c = "\"";

					#print "X".$ignore;
					if ( $ignore ne "'" ) {

						#print "Z".$ignore;
						$insidequote++;
						if ( $insidequote == 2 ) {
							$insidequote = 0;
						}
					}
				}

				#print "X".$insidequote;
			}
			elsif ( $c eq "\"" ) {

				#print "Y".$insidequote;
				if ($insidequote) {
					$c = "'";
				}
				else {
					if ( $ignore ne "\"" ) {
						$insidedquote++;
						if ( $insidedquote == 2 ) {
							$insidedquote = 0;
						}
					}
				}
			}
			$ignore = "";
		}
		$s .= $c;
		$i++;
	}
	print $s;
}
close($fh);