From 56444554ef69e050e985f23ec5af688e753a8535 Mon Sep 17 00:00:00 2001
From: Seth Shaw <seth.shaw@unlv.edu>
Date: Tue, 27 Apr 2021 18:28:35 -0700
Subject: [PATCH] Move rdf namespaces into jsonld config (Issue-1520) (#832)

* move rdf namespaces into jsonld config

* Add form link to jsonld settings form
---
 islandora.install                  | 84 ++++++++++++++++++++++++++++++
 islandora.module                   | 25 ---------
 src/Form/IslandoraSettingsForm.php |  8 +++
 3 files changed, 92 insertions(+), 25 deletions(-)

diff --git a/islandora.install b/islandora.install
index e4d94f9e..f9eb1225 100644
--- a/islandora.install
+++ b/islandora.install
@@ -5,6 +5,13 @@
  * Install/update hook implementations.
  */
 
+/**
+ * Adds common namespaces to jsonld.settings.
+ */
+function islandora_install() {
+  update_jsonld_included_namespaces();
+}
+
 /**
  * Delete the 'delete_media' action we used to provide, if it exists.
  *
@@ -90,3 +97,80 @@ function islandora_update_8005() {
     }
   }
 }
+
+/**
+ * Adds adds previously hardcoded namespaces to configuration.
+ */
+function islandora_update_8006() {
+  update_jsonld_included_namespaces();
+}
+
+/**
+ * Used by install and update_8006 to add namespaces to jsonld.settings.yml.
+ */
+function update_jsonld_included_namespaces() {
+  $namespaces = [
+    [
+      'prefix' => 'ldp',
+      'namespace' => 'http://www.w3.org/ns/ldp#',
+    ], [
+      'prefix' => 'dc11',
+      'namespace' => 'http://purl.org/dc/elements/1.1/',
+    ], [
+      'prefix' => 'dcterms',
+      'namespace' => 'http://purl.org/dc/terms/',
+    ], [
+      'prefix' => 'nfo',
+      'namespace' => 'http://www.semanticdesktop.org/ontologies/2007/03/22/nfo/v1.1/',
+    ], [
+      'prefix' => 'ebucore',
+      'namespace' => 'http://www.ebu.ch/metadata/ontologies/ebucore/ebucore#',
+    ], [
+      'prefix' => 'fedora',
+      'namespace' => 'http://fedora.info/definitions/v4/repository#',
+    ], [
+      'prefix' => 'owl',
+      'namespace' => 'http://www.w3.org/2002/07/owl#',
+    ], [
+      'prefix' => 'ore',
+      'namespace' => 'http://www.openarchives.org/ore/terms/',
+    ], [
+      'prefix' => 'rdf',
+      'namespace' => 'http://www.w3.org/1999/02/22-rdf-syntax-ns#',
+    ], [
+      'prefix' => 'rdau',
+      'namespace' => 'http://rdaregistry.info/Elements/u/',
+    ], [
+      'prefix' => 'islandora',
+      'namespace' => 'http://islandora.ca/',
+    ], [
+      'prefix' => 'pcdm',
+      'namespace' => 'http://pcdm.org/models#',
+    ], [
+      'prefix' => 'use',
+      'namespace' => 'http://pcdm.org/use#',
+    ], [
+      'prefix' => 'iana',
+      'namespace' => 'http://www.iana.org/assignments/relation/',
+    ], [
+      'prefix' => 'premis',
+      'namespace' => 'http://www.loc.gov/premis/rdf/v1#',
+    ], [
+      'prefix' => 'premis3',
+      'namespace' => 'http://www.loc.gov/premis/rdf/v3/',
+    ], [
+      'prefix' => 'co',
+      'namespace' => 'http://purl.org/co/',
+    ],
+  ];
+
+  $config = \Drupal::configFactory()->getEditable('jsonld.settings');
+  if ($config && !is_array($config->get('rdf_namespaces'))) {
+    $config->set('rdf_namespaces', $namespaces);
+    $config->save(TRUE);
+  }
+  else {
+    \Drupal::logger('islandora')
+      ->warning("Could not find required jsonld.settings to add default RDF namespaces.");
+  }
+}
diff --git a/islandora.module b/islandora.module
index 0a86a6ac..738be5b4 100644
--- a/islandora.module
+++ b/islandora.module
@@ -43,31 +43,6 @@ function islandora_help($route_name, RouteMatchInterface $route_match) {
   }
 }
 
-/**
- * Implements hook_rdf_namespaces().
- */
-function islandora_rdf_namespaces() {
-  // Yes, it's amazing, rdf is not registered by default!
-  return [
-    'ldp'  => 'http://www.w3.org/ns/ldp#',
-    'dc11' => 'http://purl.org/dc/elements/1.1/',
-    'dcterms' => 'http://purl.org/dc/terms/',
-    'nfo' => 'http://www.semanticdesktop.org/ontologies/2007/03/22/nfo/v1.1/',
-    'ebucore' => 'http://www.ebu.ch/metadata/ontologies/ebucore/ebucore#',
-    'fedora' => 'http://fedora.info/definitions/v4/repository#',
-    'owl' => 'http://www.w3.org/2002/07/owl#',
-    'ore' => 'http://www.openarchives.org/ore/terms/',
-    'rdf' => 'http://www.w3.org/1999/02/22-rdf-syntax-ns#',
-    'islandora' => 'http://islandora.ca/',
-    'pcdm' => 'http://pcdm.org/models#',
-    'use' => 'http://pcdm.org/use#',
-    'iana' => 'http://www.iana.org/assignments/relation/',
-    'premis' => 'http://www.loc.gov/premis/rdf/v1#',
-    'premis3' => 'http://www.loc.gov/premis/rdf/v3/',
-    'co' => 'http://purl.org/co/',
-  ];
-}
-
 /**
  * Implements hook_node_insert().
  */
diff --git a/src/Form/IslandoraSettingsForm.php b/src/Form/IslandoraSettingsForm.php
index cdaa358d..2e8513f0 100644
--- a/src/Form/IslandoraSettingsForm.php
+++ b/src/Form/IslandoraSettingsForm.php
@@ -7,6 +7,7 @@ use Drupal\Core\Entity\EntityTypeBundleInfoInterface;
 use Drupal\Core\Form\ConfigFormBase;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\Site\Settings;
+use Drupal\Core\Url;
 use Stomp\Client;
 use Stomp\Exception\StompException;
 use Stomp\StatefulStomp;
@@ -184,6 +185,13 @@ class IslandoraSettingsForm extends ConfigFormBase {
         '#default_value' => $selected_bundles,
       ],
     ];
+
+    $form['rdf_namespaces'] = [
+      '#type' => 'link',
+      '#title' => $this->t('Update RDF namespace configurations in the JSON-LD module settings.'),
+      '#url' => Url::fromRoute('system.jsonld_settings'),
+    ];
+
     return parent::buildForm($form, $form_state);
   }