add oai-pmh dublin core format support

src/exposers/class-tainacan-exposers.php

@@ -13,6 +13,7 @@ class Exposers {
 	
 	public function __construct() {
 		$this->register_exposer_type('Tainacan\Exposers\Types\Xml');
+		$this->register_exposer_type('Tainacan\Exposers\Types\OAI_PMH');
 		$this->register_exposer_mapper('Tainacan\Exposers\Mappers\Dublin_Core');
 		
 		add_filter( 'rest_request_after_callbacks', [$this, 'rest_request_after_callbacks'], 10, 3 );

src/exposers/types/class-tainacan-oai-pmh.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace Tainacan\Exposers\Types;
+
+class OAI_PMH extends Xml {
+	
+	const XML_OAI_DC_NAMESPACE = "http://www.openarchives.org/OAI/2.0/oai_dc/";
+	/**
+	 * 
+	 * {@inheritDoc}
+	 * @see \Tainacan\Exposers\Types\Type::rest_request_after_callbacks()
+	 */
+	public function rest_request_after_callbacks( $response, $handler, $request ) {
+		$response->set_headers( ['Content-Type: application/xml; charset=' . get_option( 'blog_charset' )] );
+		$xml = new \SimpleXMLElement(apply_filters('tainacan-exposer-head', '<?xml version="1.0" encoding="UTF-8"?>
+			<oai_dc:dc 
+    			xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" 
+    			xmlns:dc="http://purl.org/dc/elements/1.1/" 
+    			xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
+    			xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ 
+    			http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
+			</oai_dc:dc>'
+		));
+		$namespace = apply_filters('tainacan-oai-pmh-namespace', \Tainacan\Exposers\Mappers\Dublin_Core::XML_DC_NAMESPACE);
+		$this->array_to_xml($response->get_data(), apply_filters('tainacan-oai-pmh-root', $xml), $namespace);
+		$response->set_data($xml->asXml());
+		return $response;
+	}
+	
+}

tests/test-api-exposers.php

@@ -58,8 +58,7 @@ class TAINACAN_REST_Exposers extends TAINACAN_UnitApiTestCase {
 		return ['collection' => $collection, 'item' => $item, 'field' => $field];
 	}
 	
-	public function test_exposers() {
+	public function test_xml_exposer() {
-		$this->create_meta_requirements();
 		global $Tainacan_Fields, $Tainacan_Item_Metadata;
 		
 		extract($this->create_meta_requirements());
@@ -77,7 +76,7 @@ class TAINACAN_REST_Exposers extends TAINACAN_UnitApiTestCase {
 		
 		$data = $response->get_data();
 		
-		$this->assertEquals($item->get_id() , $data['item']['id']);
+		$this->assertEquals($item->get_id(), $data['item']['id']);
 		$this->assertEquals('TestValues_exposers', $data['value']);
 		
 		$item_exposer_json = json_encode([
@@ -121,7 +120,30 @@ class TAINACAN_REST_Exposers extends TAINACAN_UnitApiTestCase {
 		$this->assertEquals('item_teste_Expose', $dc->title);
 		$this->assertEquals('TestValues_exposers', $dc->language);
 		
-		//echo $rdf->asXML();
+	}
+	
+	/**
+	 * @group oai-pmh
+	 */
+	public function test_oai_pmh() {
+		global $Tainacan_Fields, $Tainacan_Item_Metadata;
+		
+		extract($this->create_meta_requirements());
+		
+		$item_exposer_json = json_encode([
+			'exposer-type'       => 'OAI-PMH',
+			'exposer-map'       => 'Dublin Core',
+		]);
+		$request = new \WP_REST_Request('GET', $this->namespace . '/item/' . $item->get_id() . '/metadata' );
+		$request->set_body($item_exposer_json);
+		$response = $this->server->dispatch($request);
+		$this->assertEquals(200, $response->get_status());
+		$data = $response->get_data();
+		
+		$xml = new \SimpleXMLElement($data);
+		$dc = $xml->children(\Tainacan\Exposers\Mappers\Dublin_Core::XML_DC_NAMESPACE);
+		$this->assertEquals('adasdasdsa', $dc->description);
+		$this->assertEquals('item_teste_Expose', $dc->title);
 	}
 }