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#  
#  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
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#  specific language governing permissions and limitations
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#**************************************************************



package pre2par::files;

use pre2par::exiter;

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

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

	if(!( -f $arg ))
	{
		pre2par::exiter::exit_program("ERROR: Cannot find file $arg", "check_file");
	}
}

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

	my @localfile = ();

	open( IN, "<$localfile" ) || pre2par::exiter::exit_program("ERROR: Cannot open file: $localfile", "read_file");
	while ( <IN> ) { push(@localfile, $_); }
	close( IN );

	return \@localfile;
}

###########################################
# Saving files, arrays and hashes
###########################################

sub save_file
{
	my ($savefile, $savecontent) = @_;
	if (-f $savefile) { unlink $savefile };
	if (-f $savefile) { pre2par::exiter::exit_program("ERROR: Cannot delete existing file: $savefile", "save_file"); };
	open( OUT, ">$savefile" );
	print OUT @{$savecontent};
	close( OUT);
	if (! -f $savefile) { pre2par::exiter::exit_program("ERROR: Cannot write file: $savefile", "save_file"); }
}

sub save_hash
{
	my ($savefile, $hashref) = @_;

	my @printcontent = ();
	
	my ($itemkey, $itemvalue, $line);
		
	foreach $itemkey ( keys %{$hashref} )
	{
		$line = "";
		$itemvalue = $hashref->{$itemkey};
		$line = $itemkey . "=" . $itemvalue . "\n";
		push(@printcontent, $line);
	}

	open( OUT, ">$savefile" );
	print OUT @printcontent;
	close( OUT);
}

sub save_array_of_hashes
{
	my ($savefile, $arrayref) = @_;

	my @printcontent = ();
	
	my ($itemkey, $itemvalue, $line, $hashref);
		
	for ( my $i = 0; $i <= $#{$arrayref}; $i++ )
	{		
		$line = "";
		$hashref = ${$arrayref}[$i];
				
		foreach $itemkey ( keys %{$hashref} )
		{
			$itemvalue = $hashref->{$itemkey};

			$line = $line . $itemkey . "=" . $itemvalue . "\t";
		}

		$line = $line . "\n";
		
		push(@printcontent, $line);
	}

	open( OUT, ">$savefile" );
	print OUT @printcontent;
	close( OUT);
}

1;