Initial Commit

database/perl/vendor/lib/DBIx/Class/CDBICompat/TempColumns.pm

@@ -0,0 +1,94 @@
+package # hide from PAUSE
+    DBIx::Class::CDBICompat::TempColumns;
+
+use strict;
+use warnings;
+use base qw/Class::Data::Inheritable/;
+
+use Carp;
+
+__PACKAGE__->mk_classdata('_temp_columns' => { });
+
+sub _add_column_group {
+  my ($class, $group, @cols) = @_;
+
+  return $class->next::method($group, @cols) unless $group eq 'TEMP';
+
+  my %new_cols = map { $_ => 1 } @cols;
+  my %tmp_cols = %{$class->_temp_columns};
+
+  for my $existing_col ( grep $new_cols{$_}, $class->columns ) {
+      # Already been declared TEMP
+      next if $tmp_cols{$existing_col};
+
+      carp "Declaring column $existing_col as TEMP but it already exists";
+  }
+
+  $class->_register_column_group($group => @cols);
+  $class->mk_group_accessors('temp' => @cols);
+
+  $class->_temp_columns({ %tmp_cols, %new_cols });
+}
+
+sub new {
+  my ($class, $attrs, @rest) = @_;
+
+  my $temp = $class->_extract_temp_data($attrs);
+
+  my $new = $class->next::method($attrs, @rest);
+
+  $new->set_temp($_, $temp->{$_}) for keys %$temp;
+
+  return $new;
+}
+
+sub _extract_temp_data {
+  my($self, $data) = @_;
+
+  my %temp;
+  foreach my $key (keys %$data) {
+    $temp{$key} = delete $data->{$key} if $self->_temp_columns->{$key};
+  }
+
+  return \%temp;
+}
+
+sub find_column {
+  my ($class, $col, @rest) = @_;
+  return $col if $class->_temp_columns->{$col};
+  return $class->next::method($col, @rest);
+}
+
+sub set {
+  my($self, %data) = @_;
+
+  my $temp_data = $self->_extract_temp_data(\%data);
+
+  $self->set_temp($_, $temp_data->{$_}) for keys %$temp_data;
+
+  return $self->next::method(%data);
+}
+
+sub get_temp {
+  my ($self, $column) = @_;
+  $self->throw_exception( "Can't fetch data as class method" ) unless ref $self;
+  $self->throw_exception( "No such TEMP column '${column}'" ) unless $self->_temp_columns->{$column} ;
+  return $self->{_temp_column_data}{$column}
+    if exists $self->{_temp_column_data}{$column};
+  return undef;
+}
+
+sub set_temp {
+  my ($self, $column, $value) = @_;
+  $self->throw_exception( "No such TEMP column '${column}'" )
+    unless $self->_temp_columns->{$column};
+  $self->throw_exception( "set_temp called for ${column} without value" )
+    if @_ < 3;
+  return $self->{_temp_column_data}{$column} = $value;
+}
+
+sub has_real_column {
+  return 1 if shift->has_column(shift);
+}
+
+1;