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# Movable Type (r) Open Source (C) 2001-2012 Six Apart, Ltd.
# This program is distributed under the terms of the
# GNU General Public License, version 2.
#
# $Id$
package MT::Summary::Proxy;
use strict;
use warnings;
use base qw( MT::Meta::Proxy );
sub META_CLASS {'MT::Summary'}
sub META_WHICH {'summary'}
sub set {
my $proxy = shift;
my ( $terms, $value ) = @_;
# xxx When you update the metadata, you have to preserve the
# original data as well. This should be eliminated by adding the
# update optimization for metadata columns
$proxy->lazier_load_objects;
$proxy->{__objects}->{ $terms->{type} }
= $proxy->create_meta_object( $terms, $value );
$proxy->{__loaded}->{ $terms->{type} } = 1;
if ( %{ $proxy->{__loaded} } ) {
$proxy->{__pkeys}->{type}
= { not => [ keys %{ $proxy->{__loaded} } ] };
}
else {
delete $proxy->{__pkeys}->{type};
}
$proxy->{__objects}->{ $terms->{type} }->expired(0);
$proxy->save_one($terms);
$proxy->get($terms);
}
sub get {
my $proxy = shift;
my ($terms) = @_;
require MT::Summary;
$terms = MT::Summarizable::_set_terms($terms);
my ( $col, $class ) = ( $terms->{type}, $terms->{class} );
$proxy->lazier_load_objects;
my $pkg = $proxy->{pkg};
if ( my $field = $proxy->META_CLASS()->metadata_by_name( $pkg, $class ) )
{
if ( !exists $proxy->{__objects}->{$col} ) {
$proxy->{__objects}->{$col} = $proxy->meta_pkg->new;
}
if ( !$proxy->{__loaded}->{$col} ) {
$proxy->load_objects($col);
}
my $meta = $proxy->{__objects}->{$col};
my $type = $field->{type}
or Carp::croak("$col not found on $pkg summaries");
unless ( $meta->has_column($type) ) {
Carp::croak(
"something is wrong: $type not in column_values of summary");
}
return $meta->$type;
}
else {
Carp::croak("Summary $class on $pkg not found.");
}
}
sub create_meta_object {
my $proxy = shift;
my ( $terms, $value ) = @_;
require MT::Summary;
$terms = MT::Summarizable::_set_terms($terms);
my $pkg = $proxy->{pkg};
my $meta = $proxy->meta_pkg->new;
my $field
= $proxy->META_CLASS()->metadata_by_name( $pkg, $terms->{class} )
or Carp::croak("there's no field $terms->{class} on $pkg");
my $type_id = $field->{type_id}
or Carp::croak("no type_id for $terms->{class}");
my $id = $field->{id};
my $type = $MT::Meta::Types{$type_id};
$meta->type( $terms->{type} );
$meta->class( $terms->{class} );
$meta->$type($value);
$meta;
}
sub save_one {
my $proxy = shift;
my ($terms) = @_;
my $field = $terms->{type};
my $meta_obj = $proxy->{__objects}->{$field};
## primary key from core object
foreach my $pkey ( keys %{ $proxy->{__pkeys} } ) {
next if ( $pkey eq 'type' );
my $pval = $proxy->{__pkeys}->{$pkey};
$meta_obj->$pkey($pval);
}
my $pkg = $proxy->{pkg};
my $meta = $proxy->META_CLASS()->metadata_by_name( $pkg, $terms->{class} )
or Carp::croak("Metadata $terms->{class} on $pkg not found.");
my $type = $meta->{type};
my $meta_col_def = $meta_obj->column_def($type);
my $meta_is_blob = $meta_col_def ? $meta_col_def->{type} eq 'blob' : 0;
## xxx can be a hook?
if ( !defined $meta_obj->$type() ) {
$meta_obj->remove;
}
else {
MT::Meta::Proxy::serialize_blob( $field, $meta_obj ) if $meta_is_blob;
$meta_obj->save || die $meta_obj->errstr;
MT::Meta::Proxy::unserialize_blob($meta_obj) if $meta_is_blob;
}
}
sub load_objects {
my $proxy = shift;
return unless $proxy->{__pkeys};
my ($col) = @_;
my $pkg = $proxy->{pkg};
my $meta_pkg = $proxy->meta_pkg;
my @objs = $meta_pkg->search(
{ %{ $proxy->{__pkeys} }, $col ? ( type => $col ) : () } );
foreach my $meta_obj (@objs) {
my $type_id = $meta_obj->class;
my $field = $proxy->META_CLASS()->metadata_by_id( $pkg, $type_id )
or next;
my $name = $meta_obj->type;
my $type = $field->{type};
my $meta_col_def = $meta_obj->column_def($type);
if ($meta_col_def) {
if ( $meta_col_def->{type} eq 'blob' ) {
MT::Meta::Proxy::unserialize_blob($meta_obj);
}
elsif ( $meta_col_def->{type} eq 'datetime' ) {
$meta_obj->$type( _db2ts( $meta_obj->$type ) );
}
}
$proxy->{__objects}->{$name} = $meta_obj;
$proxy->{__loaded} ||= {};
if ( !$proxy->{__loaded}->{$name} ) {
$proxy->{__loaded}->{$name} = 1;
$proxy->{__is_expired}->{$name} = $meta_obj->expired
if $meta_obj->expired;
$proxy->{__pkeys}->{type}
= { not => [ keys %{ $proxy->{__loaded} } ] };
}
}
}
1;
__END__
=head1 NAME
MT::Summary::Proxy - interface to a MT::Object's summary objects
=head1 DESCRIPTION
I<MT::Summary::Proxy> provides the low-level interface between a summarizable
I<MT::Object> and its summary class generated by I<MT::Summary>.
=head1 USAGE
I<MT::Summary::Proxy> inherits most of its functionality from
I<MT::Meta::Proxy>, with the following significant differences.
=head2 $terms
Instead of a scalar value specifying a metadata field, the I<$terms> argument
passed to the I<get>, I<set>, and I<create_meta_object> methods can optionally
be a hashref containing I<class> and/or I<type> elements. Refer to the
documentation for I<MT::Summarizable> for an explanation of how these are used
to specify simple or parameterized summaries.
=head2 $proxy->set($terms, $value)
Unlike I<MT::Meta::Proxy->set()>, this method not only sets a summary's value
but saves it to the database immediately; there is no need to save the parent
object.
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