MetadataTemplate::fetchValues(): remove duplicates

.gitignore

@@ -6,4 +6,5 @@
 /.phpunit.cache
 /config
 /log
+/build
 /harvestoaipmh.php

src/acdhOeaw/arche/oaipmh/metadata/TemplateMetadata.php

@@ -463,6 +463,7 @@ private function fetchValues(Value $val): array {
                 $sbjs = $objs;
             }
         }
+        $sbjs = array_unique($sbjs);
         usort($sbjs, fn($x, $y) => ((string) $x) <=> ((string) $y));
         return $sbjs;
     }

tests/TemplateMetadataTest.php

@@ -364,6 +364,17 @@ public function testIfSpecial(): void {
 <cc1>baz</cc1>
 <cc2>baz</cc2>
 </root>
+OUT;
+        $this->assertEquals($this->std($expected), $xml);
+    }
+
+    public function testForeachDistinct(): void {
+        $tmpl     = $this->getMetadataObject('foreachDistinct');
+        $xml      = $this->asString($tmpl->getXml());
+        $expected = <<<OUT
+<root>
+<b>http://127.0.0.1/api/987</b>
+</root>
 OUT;
         $this->assertEquals($this->std($expected), $xml);
     }

tests/data/foreachDistinct.ttl

@@ -0,0 +1,8 @@
+<http://127.0.0.1/api/123>  <https://id>        <http://127.0.0.1/api/123> .
+<http://127.0.0.1/api/234>  <https://id>        <http://127.0.0.1/api/234> ;
+                            <https://isPartOf>  <http://127.0.0.1/api/123> ;
+                            <https://author>    <http://127.0.0.1/api/987> .
+<http://127.0.0.1/api/235>  <https://id>        <http://127.0.0.1/api/235> ;
+                            <https://isPartOf>  <http://127.0.0.1/api/123> ;
+                            <https://author>    <http://127.0.0.1/api/987> .
+<http://127.0.0.1/api/987>  <https://id>        <http://127.0.0.1/api/987> .

tests/data/foreachDistinct.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<root>
+    <a foreach="/^base:isPartOf/base:author" remove="remove">
+        <b val="CURNODE"/>
+    </a>
+</root>
+

tests/data/foreachDistinct.yml

@@ -0,0 +1,10 @@
+metadataPrefix: templateMetadata
+metadataNamespace: http://unknown/namespace
+schema: http://unknown/schema
+class: \acdhOeaw\arche\oaipmh\metadata\TemplateMetadata
+templatePath: ""
+keepComments: false
+xmlErrors: true
+rdfNamespaces:
+    base: https://
+    local: http://127.0.0.1/api/