+package SL::DB::RequirementSpecPicture;
+
+use strict;
+
+use Carp;
+use GD;
+use Image::Info;
+use List::MoreUtils qw(apply);
+use List::Util qw(max);
+use Rose::DB::Object::Util;
+use SL::DB::MetaSetup::RequirementSpecPicture;
+use SL::DB::Manager::RequirementSpecPicture;
+use SL::DB::Helper::ActsAsList;
+use SL::Locale::String;
+
+__PACKAGE__->meta->initialize;
+
+__PACKAGE__->configure_acts_as_list(group_by => [qw(requirement_spec_id text_block_id)]);
+
+__PACKAGE__->before_save(\&_create_picture_number);
+__PACKAGE__->before_save(\&_update_thumbnail);
+
+our %supported_mime_types = (
+ 'image/gif' => { extension => 'gif', convert_to_png => 1, },
+ 'image/png' => { extension => 'png' },
+ 'image/jpeg' => { extension => 'jpg' },
+);
+
+sub _create_picture_number {
+ my ($self) = @_;
+
+ return 1 if $self->number;
+ return 0 if !$self->requirement_spec_id;
+
+ my $next_number = $self->requirement_spec->previous_picture_number + 1;
+
+ $self->requirement_spec->update_attributes(previous_picture_number => $next_number) || return 0;
+
+ $self->number($next_number);
+
+ return 1;
+}
+
+sub _update_thumbnail {
+ my ($self) = @_;
+
+ return 1 if !$self->picture_content || !$self->picture_content_type || !Rose::DB::Object::Util::get_column_value_modified($self, 'picture_content');
+ $self->create_thumbnail;
+ return 1;
+}
+
+sub create_thumbnail {
+ my ($self) = @_;
+
+ croak "No picture set yet" if !$self->picture_content;
+
+ my $image = GD::Image->new($self->picture_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);
+
+ $self->thumbnail_content($thumbnail->png);
+ $self->thumbnail_content_type('image/png');
+ $self->thumbnail_width($new_width);
+ $self->thumbnail_height($new_height);
+
+ return 1;
+}
+
+sub update_type_and_dimensions {
+ my ($self) = @_;
+
+ return () if !$self->picture_content;
+ return () if $self->picture_content_type && $self->picture_width && $self->picture_height && !Rose::DB::Object::Util::get_column_value_modified($self, 'picture_content');
+
+ my @errors = $self->probe_type;
+ return @errors if @errors;
+
+ my $info = $supported_mime_types{ $self->picture_content_type };
+ if ($info->{convert_to_png}) {
+ $self->picture_content(GD::Image->new($self->picture_content)->png);
+ $self->picture_content_type('image/png');
+ $self->picture_file_name(apply { s/\.[^\.]+$//; $_ .= '.png'; } $self->picture_file_name);
+ }
+
+ return ();
+}
+
+sub probe_type {
+ my ($self) = @_;
+
+ return (t8("No picture uploaded yet")) if !$self->picture_content;
+
+ my $info = Image::Info::image_info(\$self->{picture_content});
+ if (!$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)));
+ }
+
+ $self->picture_content_type($info->{file_media_type});
+ $self->picture_width($info->{width});
+ $self->picture_height($info->{height});
+ $self->picture_mtime(DateTime->now_local);
+
+ $self->create_thumbnail;
+
+ return ();
+}
+
+sub get_default_file_name_extension {
+ my ($self) = @_;
+
+ my $info = $supported_mime_types{ $self->picture_content_type } || croak("Unsupported content type " . $self->picture_content_type);
+ return $info->{extension};
+}
+
+sub validate {
+ my ($self) = @_;
+
+ my @errors;
+
+ push @errors, t8('The file name is missing') if !$self->picture_file_name;
+
+ if (!length($self->picture_content // '')) {
+ push @errors, t8('No picture has been uploaded');
+
+ } else {
+ push @errors, $self->update_type_and_dimensions;
+ }
+
+ return @errors;
+}
+
+1;