make rdf namespaces configurable

config/install/islandora.settings.yml

@@ -2,3 +2,55 @@ broker_url: 'tcp://localhost:61613'
 jwt_expiry: '+2 hour'
 gemini_url: ''
 gemini_pseudo_bundles: []
+rdf_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/schema/islandora.schema.yml

@@ -22,6 +22,18 @@ islandora.settings:
       label: 'List of node, media and taxonomy terms that should include the linked Fedora URI'
       sequence:
         type: string
+    rdf_namespaces:
+        type: sequence
+        label: 'RDF Namespaces'
+        sequence:
+            type: mapping
+            mapping:
+                prefix: 
+                    type: string
+                    label: 'RDF Prefix'
+                namespace:
+                    type: string
+                    label: 'Fully Qualified RDF Namespace'
 
 
 action.configuration.emit_node_event:

islandora.module

@@ -47,25 +47,16 @@ 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!
+  $config = \Drupal::config('islandora.settings');
-  return [
+  $namespace_config = $config->get('rdf_namespaces');
-    'ldp'  => 'http://www.w3.org/ns/ldp#',
+  if (!is_array($namespace_config)) {
-    'dc11' => 'http://purl.org/dc/elements/1.1/',
+    \Drupal::logger('islandora')->warning("RDF Map config is not an array. Please check your RDF namespaces configuration in islandora core settings.");
-    'dcterms' => 'http://purl.org/dc/terms/',
+  }
-    'nfo' => 'http://www.semanticdesktop.org/ontologies/2007/03/22/nfo/v1.1/',
+  $namespaces = [];
-    'ebucore' => 'http://www.ebu.ch/metadata/ontologies/ebucore/ebucore#',
+  foreach ($namespace_config as $namespace) {
-    'fedora' => 'http://fedora.info/definitions/v4/repository#',
+    $namespaces[$namespace['prefix']] = $namespace['namespace'];
-    'owl' => 'http://www.w3.org/2002/07/owl#',
+  }
-    'ore' => 'http://www.openarchives.org/ore/terms/',
+  return $namespaces;
-    '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/',
-  ];
 }
 
 /**

src/Form/IslandoraSettingsForm.php

@@ -34,6 +34,7 @@ class IslandoraSettingsForm extends ConfigFormBase {
     'month',
     'year',
   ];
+  const RDF_NAMESPACES = 'rdf_namespaces';
 
   /**
    * To list the available bundle types.
@@ -184,6 +185,17 @@ class IslandoraSettingsForm extends ConfigFormBase {
         '#default_value' => $selected_bundles,
       ],
     ];
+
+    $rdf_namespaces = '';
+    foreach ($config->get('rdf_namespaces') as $namespace) {
+      $rdf_namespaces .= $namespace['prefix'] . '|' . $namespace['namespace'] . "\n";
+    }
+    $form[self::RDF_NAMESPACES] = [
+      '#type' => 'textarea',
+      '#title' => $this->t('RDF Namespaces'),
+      '#default_value' => $rdf_namespaces,
+    ];
+
     return parent::buildForm($form, $form_state);
   }
 
@@ -259,6 +271,22 @@ class IslandoraSettingsForm extends ConfigFormBase {
         );
       }
     }
+
+    // Validate RDF Namespaces.
+    foreach (preg_split("/[\r\n]+/", $form_state->getValue(self::RDF_NAMESPACES)) as $line) {
+      if (empty($line)) {
+        continue;
+      }
+      $namespace = explode("|", trim($line));
+      if (empty($namespace[0]) || empty($namespace[1])) {
+        $form_state->setErrorByName(
+          self::RDF_NAMESPACES,
+          $this->t("RDF Namespace form is malformed on line '@line'",
+            ['@line' => trim($line)]
+          )
+        );
+      }
+    }
   }
 
   /**
@@ -285,10 +313,25 @@ class IslandoraSettingsForm extends ConfigFormBase {
       }
     }
 
+    $namespaces_array = [];
+    foreach (preg_split("/[\r\n]+/", $form_state->getValue(self::RDF_NAMESPACES)) as $line) {
+      if (empty($line)) {
+        continue;
+      }
+      $namespace = explode("|", trim($line));
+      if (!empty($namespace[0]) && !empty($namespace[1])) {
+        $namespaces_array[] = [
+          'prefix' => trim($namespace[0]),
+          'namespace' => trim($namespace[1]),
+        ];
+      }
+    }
+
     $config
       ->set(self::BROKER_URL, $form_state->getValue(self::BROKER_URL))
       ->set(self::JWT_EXPIRY, $form_state->getValue(self::JWT_EXPIRY))
       ->set(self::GEMINI_PSEUDO, $pseudo_types)
+      ->set(self::RDF_NAMESPACES, $namespaces_array)
       ->save();
 
     parent::submitForm($form, $form_state);