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#  to you under the Apache License, Version 2.0 (the
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#  
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package installer::scppatchsoname;

use installer::files;
use installer::globals;
use installer::logger;
use installer::setupscript;
use installer::systemactions;

########################################################################################
# The length of the new string must be identical with the length of the old string
########################################################################################

sub change_length_of_string
{
	my ($newstringref, $oldstring) = @_;
	
	while ( length($$newstringref) < length($oldstring) )
	{
		$$newstringref = $$newstringref . chr(0);
	}
}

########################################################################################
# The length of the new string must be identical with the length of the old string
########################################################################################

sub change_length_of_string_with_letter
{
	my ($newstringref, $oldstring, $onestring) = @_;
	
	while ( length($$newstringref) < length($oldstring) )
	{
		$$newstringref = $$newstringref . $onestring;
	}
}

########################################################################################
# Converting a string to a unicode string
########################################################################################

sub convert_to_unicode
{
	my ($string) = @_;
	
	my $unicodestring = "";
	
	my $stringlength = length($string);
	
	for ( my $i = 0; $i < $stringlength; $i++ )
	{
		$unicodestring = $unicodestring . substr($string, $i, 1);
		$unicodestring = $unicodestring . chr(0);
	}	

	return $unicodestring;
}

########################################################################################
# Replacing the so name in all files with flag PATCH_SO_NAME
########################################################################################

sub replace_productname_in_file
{
	my ($sourcepath, $destpath, $variableshashref, $onefilehash, $styles) = @_;

	my $onefile = installer::files::read_binary_file($sourcepath);

	# searching for "x" 

	my $onestring = "x" . chr(0);
	my $replacestring = "";
	for ( my $i = 1; $i <= 80; $i++ ) { $replacestring .= $onestring; }

	my $productname = $variableshashref->{'PRODUCTNAME'} . " " . $variableshashref->{'PRODUCTVERSION'};
	if ( exists($onefilehash->{'FileDescription'}) ) { $productname = $onefilehash->{'FileDescription'}; }
	my $unicode_productname = convert_to_unicode($productname);

	change_length_of_string(\$unicode_productname, $replacestring);

	my $found1 = $onefile =~ s/$replacestring/$unicode_productname/sg;

	my $found2 = 0;

	if ( $styles =~ /\bPATCH_SO_NAME_Z\b/ )
	{
		# searching for "z" 

		$onestring = "z" . chr(0);
		$replacestring = "";
		for ( my $i = 1; $i <= 80; $i++ ) { $replacestring .= $onestring; }

		my $productname2 = $variableshashref->{'PRODUCTNAME'} . " " . $variableshashref->{'PRODUCTVERSION'};
		if ( exists($onefilehash->{'FileDescriptionZ'}) ) { $productname2 = $onefilehash->{'FileDescriptionZ'}; }
		my $unicode_productname2 = convert_to_unicode($productname2);

		change_length_of_string_with_letter(\$unicode_productname2, $replacestring, $onestring);

		$found2 = $onefile =~ s/$replacestring/$unicode_productname2/sg;
	}

	installer::files::save_binary_file($onefile, $destpath);

	my $found = $found1 + $found2;
	
	return $found;
}

#########################################################
# Analyzing files with flag PATCH_SO_NAME
#########################################################

sub resolving_patchsoname_flag
{
	my ($filesarrayref, $variableshashref, $item, $languagestringref) = @_;

	my $diritem = lc($item);

	my $replacedirbase = installer::systemactions::create_directories("patchsoname_$diritem", $languagestringref);

	installer::logger::include_header_into_logfile("$item with flag PATCH_SO_NAME:");

	for ( my $i = 0; $i <= $#{$filesarrayref}; $i++ )
	{
		my $onefile = ${$filesarrayref}[$i];
		my $styles = "";
		
		if ( $onefile->{'Styles'} ) { $styles = $onefile->{'Styles'}; }
	
		if ( $styles =~ /\bPATCH_SO_NAME\b/ )
		{
			# Language specific subdirectory

			my $onelanguage = $onefile->{'specificlanguage'};
            my $filedescription = "";
			
			if ($onelanguage eq "")
			{
				$onelanguage = "00";	# files without language into directory "00"
			}
			
			my $replacedir = $replacedirbase . $installer::globals::separator . $onelanguage . $installer::globals::separator; 
			installer::systemactions::create_directory($replacedir);	# creating language specific directories

			# copy files and edit them with the variables defined in the zip.lst
				
			my $onefilename = $onefile->{'Name'};
			my $sourcepath = $onefile->{'sourcepath'};
			my $destinationpath = $replacedir . $onefilename;  
			my $movepath = $destinationpath . ".orig";

			# if (!(-f $destinationpath))	# do nothing if the file already exists
			# {
				
			my $copysuccess = installer::systemactions::copy_one_file($sourcepath, $movepath);
	
			if ( $copysuccess )
			{
				# Now the file can be patch (binary!)
				my $found = replace_productname_in_file($movepath, $destinationpath, $variableshashref, $onefile, $styles);
					
				if ($found == 0)
				{
					my $infoline = "Did not patch the file $destinationpath\n";
					push( @installer::globals::logfileinfo, $infoline);
				}
				else
				{
					my $infoline = "Successfully patched $destinationpath, Count: $found\n";
					push( @installer::globals::logfileinfo, $infoline);
				}
			}

			# }		

			# Saving the original source, where the file was found
			$onefile->{'originalsourcepath'} = $onefile->{'sourcepath'};
	
			# Saving the original source, where the file was found
			$onefile->{'originalsourcepath'} = $onefile->{'sourcepath'};

			# Writing the new sourcepath into the hashref, even if it was no copied
				
			$onefile->{'sourcepath'} = $destinationpath;
		}
	}

	my $infoline = "\n";
	push( @installer::globals::logfileinfo, $infoline);
}

1;