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package SL::Helper::CreatePDF;
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use strict;
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use Carp;
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use Cwd;
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use English qw(-no_match_vars);
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use File::Slurp ();
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use File::Spec ();
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use File::Temp ();
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use List::MoreUtils qw(uniq);
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use List::Util qw(first);
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use String::ShellQuote ();
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use SL::Form;
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use SL::Common;
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use SL::DB::Language;
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use SL::DB::Printer;
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use SL::MoreCommon;
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use SL::Template;
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use SL::Template::LaTeX;
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use Exporter 'import';
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our @EXPORT_OK = qw(create_pdf merge_pdfs find_template);
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our %EXPORT_TAGS = (
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all => \@EXPORT_OK,
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);
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sub create_pdf {
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my ($class, %params) = @_;
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return __PACKAGE__->create_parsed_file(
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format => 'pdf',
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template_type => 'LaTeX',
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%params,
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);
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}
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sub create_parsed_file {
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my ($class, %params) = @_;
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my $userspath = $::lx_office_conf{paths}->{userspath};
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my $vars = $params{variables} || {};
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my $form = Form->new('');
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$form->{$_} = $vars->{$_} for keys %{ $vars };
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$form->{format} = lc($params{format} || 'pdf');
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$form->{cwd} = getcwd();
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$form->{templates} = $::instance_conf->get_templates;
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$form->{IN} = $params{template};
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$form->{tmpdir} = $form->{cwd} . '/' . $userspath;
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my $tmpdir = $form->{tmpdir};
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my ($suffix) = $params{template} =~ m{\.(.+)};
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my ($temp_fh, $tmpfile) = File::Temp::tempfile(
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'kivitendo-printXXXXXX',
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SUFFIX => ".${suffix}",
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DIR => $form->{tmpdir},
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UNLINK => ($::lx_office_conf{debug} && $::lx_office_conf{debug}->{keep_temp_files})? 0 : 1,
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);
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$form->{tmpfile} = $tmpfile;
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my $parser = SL::Template::create(
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type => ($params{template_type} || 'LaTeX'),
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source => $form->{IN},
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form => $form,
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myconfig => \%::myconfig,
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userspath => $tmpdir,
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);
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my $result = $parser->parse($temp_fh);
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close $temp_fh;
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chdir $form->{cwd};
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if (!$result) {
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$form->cleanup;
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die $parser->get_error;
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}
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# SL::Template:** modify $form->{tmpfile} by removing its
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# $form->{userspath} prefix. They also store the final file's actual
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# file name in $form->{tmpfile} – but it is now relative to
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# $form->{userspath}. Other modules return the full file name…
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my ($volume, $directory, $file_name) = File::Spec->splitpath($form->{tmpfile});
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my $full_file_name = File::Spec->catfile($tmpdir, $file_name);
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if (($params{return} || 'content') eq 'file_name') {
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my $new_name = File::Spec->catfile($tmpdir, 'keep-' . $form->{tmpfile});
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rename $full_file_name, $new_name;
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$form->cleanup;
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return $new_name;
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}
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my $content = File::Slurp::read_file($full_file_name);
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$form->cleanup;
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return $content;
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}
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sub merge_pdfs {
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my ($class, %params) = @_;
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return scalar(File::Slurp::read_file($params{file_names}->[0])) if scalar(@{ $params{file_names} }) < 2;
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my ($temp_fh, $temp_name) = File::Temp::tempfile(
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'kivitendo-printXXXXXX',
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SUFFIX => '.pdf',
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DIR => $::lx_office_conf{paths}->{userspath},
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UNLINK => ($::lx_office_conf{debug} && $::lx_office_conf{debug}->{keep_temp_files})? 0 : 1,
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);
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close $temp_fh;
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my $input_names = join ' ', String::ShellQuote::shell_quote(@{ $params{file_names} });
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my $exe = $::lx_office_conf{applications}->{ghostscript} || 'gs';
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my $output = `$exe -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite -sOutputFile=${temp_name} ${input_names} 2>&1`;
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die "Executing gs failed: $ERRNO" if !defined $output;
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die $output if $? != 0;
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return scalar File::Slurp::read_file($temp_name);
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}
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sub find_template {
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my ($class, %params) = @_;
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$params{name} or croak "Missing parameter 'name'";
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my $path = $::instance_conf->get_templates;
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my $extension = $params{extension} || "tex";
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my ($printer, $language) = ('', '');
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if ($params{printer} || $params{printer_id}) {
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if ($params{printer} && !ref $params{printer}) {
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$printer = '_' . $params{printer};
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} else {
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$printer = $params{printer} || SL::DB::Printer->new(id => $params{printer_id})->load;
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$printer = $printer->template_code ? '_' . $printer->template_code : '';
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}
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}
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if ($params{language} || $params{language_id}) {
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if ($params{language} && !ref $params{language}) {
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$language = '_' . $params{language};
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} else {
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$language = $params{language} || SL::DB::Language->new(id => $params{language_id})->load;
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$language = $language->template_code ? '_' . $language->template_code : '';
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}
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}
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my @template_files = (
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$params{name} . "${language}${printer}",
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$params{name} . "${language}",
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$params{name},
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"default",
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);
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if ($params{email}) {
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unshift @template_files, (
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$params{name} . "_email${language}${printer}",
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$params{name} . "_email${language}",
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);
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}
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@template_files = map { "${_}.${extension}" } uniq grep { $_ } @template_files;
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my $template = first { -f ($path . "/$_") } @template_files;
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return wantarray ? ($template, @template_files) : $template;
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}
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1;
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__END__
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=pod
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=encoding utf8
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=head1 NAME
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SL::Helper::CreatePDF - A helper for creating PDFs from template files
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=head1 SYNOPSIS
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# Retrieve a sales order from the database and create a PDF for
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# it:
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my $order = SL::DB::Order->new(id => …)->load;
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my $print_form = Form->new('');
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$print_form->{type} = 'invoice';
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$print_form->{formname} = 'invoice',
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$print_form->{format} = 'pdf',
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$print_form->{media} = 'file';
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$order->flatten_to_form($print_form, format_amounts => 1);
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$print_form->prepare_for_printing;
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my $pdf = SL::Helper::CreatePDF->create_pdf(
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template => 'sales_order',
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variables => $print_form,
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);
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=head1 FUNCTIONS
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=over 4
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=item C<create_pdf %params>
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Parses a LaTeX template file, creates a PDF for it and returns either
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its content or its file name. The recognized parameters are the same
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as the ones for L</create_parsed_file> with C<format> and
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C<template_type> being pre-set.
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=item C<create_parsed_file %params>
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Parses a template file and returns either its content or its file
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name. The recognized parameters are:
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=over 2
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=item * C<template> – mandatory. The template file name relative to
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the users' templates directory. Must be an existing file name,
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e.g. one retrieved by L</find_template>.
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=item * C<variables> – optional hash reference containing variables
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available to the template.
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=item * C<return> – optional scalar containing either C<content> (the
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default) or C<file_name>. If it is set to C<file_name> then the file
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name of the temporary file containing the PDF is returned, and the
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caller is responsible for deleting it. Otherwise a scalar containing
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the PDF itself is returned and all temporary files have already been
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deleted by L</create_pdf>.
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=item * C<format> – optional, defaults to C<pdf> and determines the
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output format. Can be set to C<html> for HTML output if
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C<template_type> is set to C<HTML> as well.
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=item * C<template_type> – optional, defaults to C<LaTeX> and
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determines the template's format. Can be set to C<HTML> for HTML
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output if C<format> is set to C<html> as well.
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=back
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=item C<find_template %params>
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Searches the user's templates directory for a template file name to
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use. The file names considered depend on the parameters; they can
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contain a template base name and suffixes for email, language and
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printers. As a fallback the name C<default.$extension> is also
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considered.
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The return value depends on the context. In scalar context the
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template file name that matches the given parameters is returned. It's
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a file name relative to the user's templates directory. If no template
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file is found then C<undef> is returned.
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In list context the first element is the same value as in scalar
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context. Additionally a list of considered template file names is
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returned.
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The recognized parameters are:
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=over 2
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=item * C<name> – mandatory. The template's file name basis
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without any additional suffix or extension, e.g. C<sales_quotation>.
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=item * C<extension> – optional file name extension to use without the
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dot. Defaults to C<tex>.
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=item * C<email> – optional flag indicating whether or not the
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template is to be sent via email. If set to true then template file
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names containing C<_email> are considered as well.
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=item * C<language> and C<language_id> – optional parameters
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indicating the language to be used. C<language> can be either a string
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containing the language code to use or an instance of
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C<SL::DB::Language>. C<language_id> can contain the ID of the
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C<SL::DB:Language> instance to load and use. If given template file
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names containing C<_language_template_code> are considered as well.
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=item * C<printer> and C<printer_id> – optional parameters indicating
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the printer to be used. C<printer> can be either a string containing
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the printer code to use or an instance of
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C<SL::DB::Printer>. C<printer_id> can contain the ID of the
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C<SL::DB:Printer> instance to load and use. If given template file
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names containing C<_printer_template_code> are considered as well.
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=back
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=item C<merge_pdfs %params>
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Merges two or more PDFs into a single PDF by using the external
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application ghostscript.
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The recognized parameters are:
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=over 2
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=item * C<file_names> – mandatory array reference containing the file
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names to merge.
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=back
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Note that this function relies on the presence of the external
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application ghostscript. The executable to use is configured via
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kivitendo's configuration file setting C<application.ghostscript>.
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=back
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=head1 BUGS
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Nothing here yet.
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=head1 AUTHOR
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Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>
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=cut
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