From b3420789a7e752f170fb7f433f468a34140028ee Mon Sep 17 00:00:00 2001
From: Moritz Bunkus <m.bunkus@linet-services.de>
Date: Wed, 12 Jan 2011 16:05:39 +0100
Subject: [PATCH] =?utf8?q?linked=5Frecords:=20Parameter=20'filter'=20f?=
 =?utf8?q?=C3=BCr=20Filtern=20nach=20"darf=20von=20aktueller=20Benutzerin?=
 =?utf8?q?=20gesehen=20werden"?=
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Content-Type: text/plain; charset=utf8
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---
 SL/DB/Helper/LinkedRecords.pm | 36 +++++++++++++++++++++++++++++++----
 1 file changed, 32 insertions(+), 4 deletions(-)

diff --git a/SL/DB/Helper/LinkedRecords.pm b/SL/DB/Helper/LinkedRecords.pm
index 30b08f417..99cb3ed7b 100644
--- a/SL/DB/Helper/LinkedRecords.pm
+++ b/SL/DB/Helper/LinkedRecords.pm
@@ -17,14 +17,16 @@ sub linked_records {
 
   my %sort_spec       = ( by  => delete($params{sort_by}),
                           dir => delete($params{sort_dir}) );
+  my $filter          =  delete $params{filter};
 
-  my $records         = _linked_records_implementation($self, %params);
+  my $records         = linked_records_implementation($self, %params);
+  $records            = filter_linked_records($self, $filter, @{ $records })                       if $filter;
   $records            = sort_linked_records($self, $sort_spec{by}, $sort_spec{dir}, @{ $records }) if $sort_spec{by};
 
   return $records;
 }
 
-sub _linked_records_implementation {
+sub linked_records_implementation {
   my $self     = shift;
   my %params   = @_;
 
@@ -35,8 +37,8 @@ sub _linked_records_implementation {
     my %from_to    = ( from => delete($params{from}) || $both,
                        to   => delete($params{to})   || $both);
 
-    my @records    = (@{ _linked_records_implementation($self, %params, direction => 'from', from => $from_to{from}) },
-                      @{ _linked_records_implementation($self, %params, direction => 'to',   to   => $from_to{to}  ) });
+    my @records    = (@{ linked_records_implementation($self, %params, direction => 'from', from => $from_to{from}) },
+                      @{ linked_records_implementation($self, %params, direction => 'to',   to   => $from_to{to}  ) });
 
     my %record_map = map { ( ref($_) . $_->id => $_ ) } @records;
 
@@ -171,6 +173,19 @@ sub sort_linked_records {
   return [ sort($comparator @records) ];
 }
 
+sub filter_linked_records {
+  my ($self_or_class, $filter, @records) = @_;
+
+  if ($filter eq 'accessible') {
+    my $employee = SL::DB::Manager::Employee->current;
+    @records     = grep { !$_->can('may_be_accessed') || $_->may_be_accessed($employee) } @records;
+  } else {
+    croak "Unsupported filter parameter '${filter}'";
+  }
+
+  return \@records;
+}
+
 1;
 
 __END__
@@ -218,6 +233,19 @@ The optional parameters C<$params{sort_by}> and C<$params{sort_dir}>
 can be used in order to sort the result. If C<$params{sort_by}> is
 trueish then the result is sorted by calling L</sort_linked_records>.
 
+The optional parameter C<$params{filter}> controls whether or not the
+result is filtered. Supported values are:
+
+=over 2
+
+=item C<accessible>
+
+Removes all objects for which the function C<may_be_accessed> from the
+mixin L<SL::DB::Helper::MayBeAccessed> exists and returns falsish for
+the current employee.
+
+=back
+
 Returns an array reference.
 
 =item C<link_to_record $record, %params>
-- 
2.20.1