add vocabulary description metadata from config.ttl to vocab-home page

src/model/VocabularyConfig.php

@@ -271,6 +271,15 @@ public function getTitle($lang = null)
         return $this->getLiteral('dc:title', false, $lang);
     }
 
+    /**
+     * Returns the human readable vocabulary description.
+     * @return string the description of the vocabulary
+     */
+    public function getDescription($lang = null)
+    {
+        return $this->getLiteral('dc:description', false, $lang);
+    }
+
     /**
      * Returns the sorting strategy for notation codes set in the config.ttl
      * config: either "lexical", "natural", or null if sorting by notations is

src/view/vocab-home.twig

@@ -1,6 +1,7 @@
 {% set pageType = 'vocab-home' %}
 {% extends "base-template.twig" %}
 {% block title %}{{ vocab.title(request.contentLang) }} - {{ GlobalConfig.serviceName }}{% endblock %}
+{% block description %}{{ vocab.config.description(request.contentLang) }}{% endblock %}
 
 
 {% block content %}

tests/VocabularyConfigTest.php

@@ -360,6 +360,15 @@ public function testGetTitle()
         $this->assertEquals('Test ontology', $vocab->getConfig()->getTitle('en'));
     }
 
+    /**
+     * @covers VocabularyConfig::getDescription
+     */
+    public function testGetDesctiption()
+    {
+        $vocab = $this->model->getVocabulary('test');
+        $this->assertEquals('Description of Test ontology', $vocab->getConfig()->getDescription('en'));
+    }
+
     /**
      * @covers VocabularyConfig::getShowDeprecatedChanges
      * @covers VocabularyConfig::getBoolean

tests/cypress/template/vocab-home.cy.js

@@ -9,6 +9,15 @@ describe('Vocabulary home page', () => {
     cy.get('head meta[name="title"]').should('have.attr', 'content', expectedTitle);
     cy.get('head meta[property="og:title"]').should('have.attr', 'content', expectedTitle);
   })
+  it('Contains description metadata', () => {
+    cy.visit('/test/en') // go to the "Test ontology" home page
+
+    const expectedDescription = 'Description of Test ontology'
+
+    // check that the page has description metadata
+    cy.get('head meta[name="description"]').should('have.attr', 'content', expectedDescription);
+    cy.get('head meta[property="og:description"]').should('have.attr', 'content', expectedDescription);
+  })
   it('contains vocabulary title', () => {
     cy.visit('/test/en') // go to the "Test ontology" home page
 

tests/testconfig.ttl

@@ -77,6 +77,7 @@
 
 :test a skosmos:Vocabulary, void:Dataset ;
 	dc:title "Test ontology"@en ;
+	dc:description "Description of Test ontology"@en ;
 	dc:subject :cat_science ;
     dc:type mdrtype:ONTOLOGY ;
 	void:dataDump <http://skosmos.skos/dump/test/> ;