From acc142b8d93f39ae918dcc2b929d107a0d1370d8 Mon Sep 17 00:00:00 2001
From: Adam Vessey <adam@discoverygarden.ca>
Date: Thu, 20 Jun 2013 09:23:15 -0300
Subject: [PATCH] Implement basic collection filter hook for namespaces.

---
 islandora.module | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/islandora.module b/islandora.module
index 7e1936c3..ea4050f7 100644
--- a/islandora.module
+++ b/islandora.module
@@ -1319,3 +1319,17 @@ function islandora_datastream_access($op, $datastream, $user = NULL) {
 
   return $cache[$op][$datastream->parent->id][$datastream->id][$user->uid];
 }
+
+/*
+ * Implements hook_islandora_basic_collection_get_filters().
+ */
+function islandora_islandora_basic_collection_get_filters() {
+  $enforced = variable_get('islandora_namespace_restriction_enforced', FALSE);
+  if ($enforced) {
+    $namespace_array = islandora_get_allowed_namespaces();
+    $namespace_sparql = implode('|', $namespace_array);
+    return format_string('regex(str(?object), "info:fedora/(!namespaces):")', array(
+      '!namespaces' => $namespace_sparql,
+    ));
+  }
+}