first part of ACL and re-skinning work and some other small stuff

[freeside.git] / FS / FS / m2m_Common.pm

diff --git a/FS/FS/m2m_Common.pm b/FS/FS/m2m_Common.pm
new file mode 100644 (file)
index 0000000..fd8700a
--- /dev/null
+++ b/FS/FS/m2m_Common.pm
@@ -0,0 +1,110 @@
+package FS::m2m_Common;
+
+use strict;
+use vars qw( @ISA $DEBUG );
+use FS::Schema qw( dbdef );
+use FS::Record qw( qsearch qsearchs ); #dbh );
+
+@ISA = qw( FS::Record );
+
+$DEBUG = 0;
+
+=head1 NAME
+
+FS::m2m_Common - Base class for classes in a many-to-many relationship
+
+=head1 SYNOPSIS
+
+use FS::m2m_Common;
+
+@ISA = qw( FS::m2m_Common );
+
+=head1 DESCRIPTION
+
+FS::m2m_Common is intended as a base class for classes which have a
+many-to-many relationship with another table (via a linking table).
+
+Note: It is currently assumed that the link table contains two fields
+named the same as the primary keys of ths base and target tables.
+
+=head1 METHODS
+
+=over 4
+
+=item process_m2m
+
+=cut
+
+sub process_m2m {
+  my( $self, %opt ) = @_;
+
+  my $self_pkey = $self->dbdef_table->primary_key;
+
+  my $link_table = $self->_load_table($opt{'link_table'});
+
+  my $target_table = $self->_load_table($opt{'target_table'});
+  my $target_pkey = dbdef->table($target_table)->primary_key;
+
+  foreach my $target_obj ( qsearch($target_table, {} ) ) {
+
+    my $targetnum = $target_obj->$target_pkey();
+
+    my $link_obj = qsearchs( $link_table, {
+        $self_pkey   => $self->$self_pkey(),
+        $target_pkey => $targetnum,
+    });
+
+    if ( $link_obj && ! $opt{'params'}->{"$target_pkey$targetnum"} ) {
+
+      my $d_link_obj = $link_obj; #need to save $link_obj for below.
+      my $error = $d_link_obj->delete;
+      die $error if $error;
+
+    } elsif ( $opt{'params'}->{"$target_pkey$targetnum"} && ! $link_obj ) {
+
+      #ok to clobber it now (but bad form nonetheless?)
+      #$link_obj = new "FS::$link_table" ( {
+      $link_obj = "FS::$link_table"->new( {
+        $self_pkey   => $self->$self_pkey(),
+        $target_pkey => $targetnum,
+      });
+      my $error = $link_obj->insert;
+      die $error if $error;
+    }
+
+  }
+
+  '';
+}
+
+sub _load_table {
+  my( $self, $table ) = @_;
+  eval "use FS::$table";
+  die $@ if $@;
+  $table;
+}
+
+#=item target_table
+#
+#=cut
+#
+#sub target_table {
+#  my $self = shift;
+#  my $target_table = $self->_target_table;
+#  eval "use FS::$target_table";
+#  die $@ if $@;
+#  $target_table;
+#}
+
+=back
+
+=head1 BUGS
+
+=head1 SEE ALSO
+
+L<FS::Record>
+
+=cut
+
+1;
+