+ return $error if $error;
+
+ $self->SUPER::check;
+}
+
+=item agent
+
+Returns the associated agent for this referral, if any, as an FS::agent object.
+
+=cut
+
+sub agent {
+ my $self = shift;
+ qsearchs('agent', { 'agentnum' => $self->agentnum } );
+}
+
+=back
+
+=head1 CLASS METHODS
+
+=over 4
+
+=item acl_agentnum_sql [ INCLUDE_GLOBAL_BOOL ]
+
+Returns an SQL fragment for searching for part_referral records allowed by the
+current users's agent ACLs (and "Edit global advertising sources" right).
+
+Pass a true value to include global advertising sources (for example, when
+simply using rather than editing advertising sources).
+
+=cut
+
+sub acl_agentnum_sql {
+ my $self = shift;
+
+ my $curuser = $FS::CurrentUser::CurrentUser;
+ my $sql = $curuser->agentnums_sql;
+ $sql = " ( $sql OR agentnum IS NULL ) "
+ if $curuser->access_right('Edit global advertising sources')
+ or defined($_[0]) && $_[0];
+
+ $sql;
+
+}
+
+=item all_part_referral [ INCLUDE_GLOBAL_BOOL ]
+
+Returns all part_referral records allowed by the current users's agent ACLs
+(and "Edit global advertising sources" right).
+
+Pass a true value to include global advertising sources (for example, when
+simply using rather than editing advertising sources).
+
+=cut
+
+sub all_part_referral {
+ my $self = shift;
+
+ qsearch({
+ 'table' => 'part_referral',
+ 'extra_sql' => ' WHERE '. $self->acl_agentnum_sql(@_). ' ORDER BY refnum ',
+ });
+
+}
+
+=item num_part_referral [ INCLUDE_GLOBAL_BOOL ]
+
+Returns the number of part_referral records allowed by the current users's
+agent ACLs (and "Edit global advertising sources" right).
+
+=cut
+
+sub num_part_referral {
+ my $self = shift;
+
+ my $sth = dbh->prepare(
+ 'SELECT COUNT(*) FROM part_referral WHERE '. $self->acl_agentnum_sql(@_)
+ ) or die dbh->errstr;
+ $sth->execute() or die $sth->errstr;
+ $sth->fetchrow_arrayref->[0];