# This code is part of Perl distribution Mail-Message version 4.03.
# The POD got stripped from this file by OODoc version 3.06.
# For contributors see file ChangeLog.

# This software is copyright (c) 2001-2026 by Mark Overmeer.

# This is free software; you can redistribute it and/or modify it under
# the same terms as the Perl 5 programming language system itself.
# SPDX-License-Identifier: Artistic-1.0-Perl OR GPL-1.0-or-later


package Mail::Message::Body::File;{
our $VERSION = '4.03';
}

use parent 'Mail::Message::Body';

use strict;
use warnings;

use Log::Report   'mail-message', import => [ qw/__x fault/ ];

use File::Temp qw/tempfile/;
use File::Copy qw/copy/;
use Fcntl      qw/SEEK_END/;

use Mail::Box::Parser ();
use Mail::Message     ();

#--------------------

sub _data_from_filename(@)
{	my ($self, $filename) = @_;

	open my $in, '<:raw', $filename
		or fault __x"unable to read file {name} for message body file", name => $filename;

	my $file   = $self->tempFilename;
	open my $out, '>:raw', $file
		or fault __x"cannot write to temporary body file {name}", name => $file;

	my $nrlines = 0;
	local $_;
	while(<$in>) { $out->print($_); $nrlines++ }
	$self->{MMBF_nrlines} = $nrlines;
	$self;
}

sub _data_from_filehandle(@)
{	my ($self, $fh) = @_;
	my $file    = $self->tempFilename;
	my $nrlines = 0;

	open my $out, '>:raw', $file
		or fault __x"cannot write to temporary body file {name}", name => $file;

	local $_;
	while(<$fh>)
	{	$out->print($_);
		$nrlines++;
	}

	$self->{MMBF_nrlines} = $nrlines;
	$self;
}

sub _data_from_lines(@)
{	my ($self, $lines) = @_;
	my $file = $self->tempFilename;

	open my $out, '>:raw', $file
		or fault __x"cannot write body to file {name}", name => $file;

	$out->print(@$lines);

	$self->{MMBF_nrlines} = @$lines;
	$self;
}

sub clone()
{	my $self  = shift;
	my $clone = ref($self)->new(based_on => $self);

	copy $self->tempFilename, $clone->tempFilename
		or return;

	$clone->{MMBF_nrlines} = $self->{MMBF_nrlines};
	$clone->{MMBF_size}    = $self->{MMBF_size};
	$self;
}


sub nrLines()
{	my $self    = shift;
	return $self->{MMBF_nrlines} if defined $self->{MMBF_nrlines};

	my $file    = $self->tempFilename;
	my $nrlines = 0;

	open my $in, '<:raw', $file
		or fault __x"cannot read from file {name}", name => $file;

	local $_;
	$nrlines++ while <$in>;

	$self->{MMBF_nrlines} = $nrlines;
}

sub size()
{	my $self = shift;

	return $self->{MMBF_size}
		if exists $self->{MMBF_size};

	my $size = eval { -s $self->tempFilename };

	$size   -= $self->nrLines
		if $Mail::Message::crlf_platform;   # remove count for extra CR's

	$self->{MMBF_size} = $size;
}


sub string()
{	my $self = shift;
	my $file = $self->tempFilename;

	open my $in, '<:raw', $file
		or fault __x"cannot read from file {name}", name => $file;

	join '', $in->getlines;
}


sub lines()
{	my $self = shift;
	my $file = $self->tempFilename;

	open my $in, '<:raw', $file
		or fault __x"cannot read from file {name}", name => $file;

	my $r = $self->{MMBF_nrlines} = [ $in->getlines ];
	wantarray ? @$r: $r;
}

sub file()
{	my $self = shift;
	open my($tmp), '<:raw', $self->tempFilename;
	$tmp;
}


sub print(;$)
{	my $self = shift;
	my $fh   = shift || select;

	my $file = $self->tempFilename;
	open my $in, '<:raw', $file
		or fault __x"cannot read from file {name}", name => $file;

	$fh->print($_) while <$in>;
	$in->close;

	$self;
}


sub endsOnNewline()
{	my $self = shift;

	my $file = $self->tempFilename;
	open my $in, '<:raw', $file
		or fault __x"cannot read from file {name}", name => $file;

	$in->seek(-1, SEEK_END);
	$in->read(my $char, 1);
	$char eq "\n" || $char eq "\r";
}


sub read($$;$@)
{	my ($self, $parser, $head, $bodytype) = splice @_, 0, 4;
	my $file = $self->tempFilename;

	open my $out, '>:raw', $file
		or fault __x"cannot write to file {name}", name => $file;

	(my $begin, my $end, $self->{MMBF_nrlines}) = $parser->bodyAsFile($out, @_);
	$out->close;

	$self->fileLocation($begin, $end);
	$self;
}

#--------------------

sub tempFilename(;$)
{	my $self = shift;
	@_ ? ($self->{MMBF_filename} = shift) : ($self->{MMBF_filename} //= (tempfile)[1]);
}

#--------------------

sub DESTROY { unlink $_[0]->tempFilename }

1;