#**************************************************************
#  
#  Licensed to the Apache Software Foundation (ASF) under one
#  or more contributor license agreements.  See the NOTICE file
#  distributed with this work for additional information
#  regarding copyright ownership.  The ASF licenses this file
#  to you under the Apache License, Version 2.0 (the
#  "License"); you may not use this file except in compliance
#  with the License.  You may obtain a copy of the License at
#  
#    http://www.apache.org/licenses/LICENSE-2.0
#  
#  Unless required by applicable law or agreed to in writing,
#  software distributed under the License is distributed on an
#  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
#  KIND, either express or implied.  See the License for the
#  specific language governing permissions and limitations
#  under the License.
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#**************************************************************




package packager::files;

use packager::exiter;

############################################
# File Operations
############################################

sub check_file
{
	my ($arg) = @_;

	if(!( -f $arg ))
	{
		packager::exiter::exit_program("ERROR: Cannot find file $arg", "check_file");
	}
}

sub read_file
{
	my ($localfile) = @_;

	if ( ! open( IN, $localfile ) ) {
		# try again - sometimes we get errors caused by race conditions in parallel builds
		sleep 5;
		open( IN, $localfile ) or packager::exiter::exit_program("ERROR: Cannot open file: $localfile", "read_file");
	}
	my @localfile = <IN>;
	close( IN );

	return \@localfile;
}

###########################################
# Saving files
###########################################

sub save_file
{
	my ($savefile, $savecontent) = @_;
	open( OUT, ">$savefile" );
	print OUT @{$savecontent};
	close( OUT);
	if (! -f $savefile) { packager::exiter::exit_program("ERROR: Cannot write file: $savefile", "save_file"); }
}

######################################################
# Creating a new direcotory
######################################################

sub create_directory
{
	my ($directory) = @_;
		
	my $returnvalue = 1;

	if (!(-d $directory))
	{
		$returnvalue = mkdir($directory, 0775);

		if ($returnvalue)
		{
			$infoline = "\nCreated directory: $directory\n"; 
			push(@packager::globals::logfileinfo, $infoline);
	
			if ($packager::globals::isunix)
			{
				my $localcall = "chmod 775 $directory \>\/dev\/null 2\>\&1";
				system($localcall);
			}			
		}
		else
		{
			packager::exiter::exit_program("ERROR: Could not create directory: $directory", "create_directory");
		}
	}
}

######################################################
# Creating a unique directory with number extension	
######################################################

sub create_unique_directory
{
	my ($directory) = @_;
	
	$directory =~ s/\Q$packager::globals::separator\E\s*$//;
	$directory = $directory . "_INCREASINGNUMBER";
	
	my $counter = 1;
	my $created = 0;
	my $localdirectory = "";	

	do
	{
		$localdirectory = $directory; 
		$localdirectory =~ s/INCREASINGNUMBER/$counter/;
		$counter++;			
		
		if ( ! -d $localdirectory )
		{
			create_directory($localdirectory);
			$created = 1;	
		}		
	}
	while ( ! $created );
	
	return $localdirectory;
}

######################################################
# Removing a complete directory with subdirectories
######################################################

sub remove_complete_directory
{
	my ($directory) = @_;

	my @content = ();
	
	$directory =~ s/\Q$packager::globals::separator\E\s*$//;

	if ( -d $directory )
	{
		opendir(DIR, $directory);
		@content = readdir(DIR);
		closedir(DIR);

		my $oneitem;
	
		foreach $oneitem (@content)
		{
			if ((!($oneitem eq ".")) && (!($oneitem eq "..")))
			{
				my $item = $directory . $packager::globals::separator . $oneitem;

				if ( -f $item ) 	# deleting files
				{
					unlink($item);
				}

				if ( -d $item ) 	# recursive
				{
					remove_complete_directory($item, 0);
				}
			}
		}
		
		# try to remove empty directory
		
		rmdir $directory;
		
	}	
}

1;