Dateimanagement: Controller zum Laden und Generierung der Dateien

[kivitendo-erp.git] / SL / Controller / Helper / ThumbnailCreator.pm

diff --git a/SL/Controller/Helper/ThumbnailCreator.pm b/SL/Controller/Helper/ThumbnailCreator.pm
new file mode 100644 (file)
index 0000000..072d89d
--- /dev/null
+++ b/SL/Controller/Helper/ThumbnailCreator.pm
@@ -0,0 +1,144 @@
+package SL::Controller::Helper::ThumbnailCreator;
+
+use strict;
+
+use SL::Locale::String qw(t8);
+use Carp;
+use GD;
+use Image::Info;
+use File::MimeInfo::Magic;
+use List::MoreUtils qw(apply);
+use List::Util qw(max);
+use Rose::DB::Object::Util;
+
+require Exporter;
+our @ISA      = qw(Exporter);
+our @EXPORT   = qw(file_create_thumbnail file_update_thumbnail file_probe_type file_probe_image_type file_update_type_and_dimensions);
+
+# TODO PDFs and others like odt,txt,...
+our %supported_mime_types = (
+  'image/gif'  => { extension => 'gif', convert_to_png => 1, },
+  'image/png'  => { extension => 'png' },
+  'image/jpeg' => { extension => 'jpg' },
+  'image/tiff' => { extension => 'tif'},
+);
+
+sub file_create_thumbnail {
+  my ($self) = @_;
+  croak "No picture set yet" if !$self->file_content;
+
+  my $image            = GD::Image->new($self->file_content);
+  my ($width, $height) = $image->getBounds;
+  my $max_dim          = 64;
+  my $curr_max         = max $width, $height, 1;
+  my $factor           = $curr_max <= $max_dim ? 1 : $curr_max / $max_dim;
+  my $new_width        = int($width  / $factor + 0.5);
+  my $new_height       = int($height / $factor + 0.5);
+  my $thumbnail        = GD::Image->new($new_width, $new_height);
+
+  $thumbnail->copyResized($image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
+
+  $self->thumbnail_img_content($thumbnail->png);
+  $self->thumbnail_img_content_type('image/png');
+  $self->thumbnail_img_width($new_width);
+  $self->thumbnail_img_height($new_height);
+  return 1;
+
+}
+
+sub file_update_thumbnail {
+  my ($self) = @_;
+
+  return 1 if !$self->file_content || !$self->file_content_type || !Rose::DB::Object::Util::get_column_value_modified($self, 'file_content');
+  $self->file_create_thumbnail;
+  return 1;
+}
+
+sub file_probe_image_type {
+  my ($self, $mime_type, $basefile) = @_;
+
+  if ( !$supported_mime_types{ $mime_type } ) {
+    $self->js->flash('error',t8('file \'#1\' has unsupported image type \'#2\' (supported types: #3)',
+                                $basefile, $mime_type, join(' ', sort keys %supported_mime_types)));
+    return 1;
+  }
+  return 0;
+}
+
+sub file_probe_type {
+  my ($self) = @_;
+
+  return (t8("No file uploaded yet")) if !$self->file_content;
+  my $mime_type = File::MimeInfo::Magic::magic($self->file_content);
+
+  my $info = Image::Info::image_info(\$self->{file_content});
+  if (!$info || $info->{error} || !$info->{file_media_type} || !$supported_mime_types{ $info->{file_media_type} }) {
+    $::lxdebug->warn("Image::Info error: " . $info->{error}) if $info && $info->{error};
+    return (t8('Unsupported image type (supported types: #1)', join(' ', sort keys %supported_mime_types)));
+  }
+
+  $self->file_content_type($info->{file_media_type});
+  $self->files_img_width($info->{width});
+  $self->files_img_height($info->{height});
+  $self->files_mtime(DateTime->now_local);
+
+  $self->file_create_thumbnail;
+
+  return ();
+}
+
+sub file_update_type_and_dimensions {
+  my ($self) = @_;
+
+  return () if !$self->file_content;
+  return () if $self->file_content_type && $self->files_img_width && $self->files_img_height && !Rose::DB::Object::Util::get_column_value_modified($self, 'file_content');
+
+  my @errors = $self->file_probe_type;
+  return @errors if @errors;
+
+  my $info = $supported_mime_types{ $self->file_content_type };
+  if ($info->{convert_to_png}) {
+    $self->file_content(GD::Image->new($self->file_content)->png);
+    $self->file_content_type('image/png');
+    $self->filename(apply { s/\.[^\.]+$//;  $_ .= '.png'; } $self->filename);
+  }
+  return ();
+}
+
+1;
+__END__
+
+=pod
+
+=encoding utf8
+
+=head1 NAME
+
+  SL::DB::Helper::ThumbnailCreator - DatabaseClass Helper for Fileuploads
+
+=head1 SYNOPSIS
+
+  use SL::DB::Helper::ThumbnailCreator;
+
+  # synopsis...
+
+=head1 DESCRIPTION
+
+  # longer description..
+
+=head1 AUTHOR
+
+  Werner Hahn E<lt>wh@futureworldsearch.netE<gt>
+
+=cut
+
+
+=head1 INTERFACE
+
+
+=head1 DEPENDENCIES
+
+
+=head1 SEE ALSO
+
+