Implement recast service

.gitignore

@@ -6,4 +6,4 @@ coverage.xml
 *.key
 *.log
 syn-settings.xml
-cfg/config.yaml
+*/cfg/config.yaml

Gemini/src/Controller/GeminiController.php

@@ -142,4 +142,31 @@ public function delete($uuid)
         $deleted = $this->urlMapper->deleteUrls($uuid);
         return new Response(null, $deleted ? 204 : 404);
     }
+
+    /**
+     * Find the opposite URI for the on provided in X-Islandora-URI.
+     *
+     * @param \Symfony\Component\HttpFoundation\Request $request
+     *   The incoming request.
+     *
+     * @return \Symfony\Component\HttpFoundation\Response
+     *   A response 200 with Location or 404.
+     */
+    public function getByUri(Request $request)
+    {
+        if (!$request->headers->has('X-Islandora-URI')) {
+            return new Response('Require the X-Islandora-URI header', 400);
+        }
+        $uri = $request->headers->get('X-Islandora-URI');
+        if (is_array($uri)) {
+            // Can only return one Location header.
+            $uri = reset($uri);
+        }
+        $uri = $this->urlMapper->findUrls($uri);
+        $headers = [];
+        if ($uri) {
+            $headers['Location'] = $uri;
+        }
+        return new Response(null, ($uri ? 200 : 404), $headers);
+    }
 }

Gemini/src/UrlMapper/UrlMapper.php

@@ -102,4 +102,18 @@ public function deleteUrls($uuid)
             throw $e;
         }
     }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function findUrls($uri)
+    {
+        $query =
+          'SELECT fedora_uri as uri FROM Gemini WHERE drupal_uri = :uri union
+            SELECT drupal_uri as uri FROM Gemini WHERE fedora_uri = :uri';
+        return $this->connection->fetchAssoc(
+            $query,
+            ['uri' => $uri]
+        );
+    }
 }

Gemini/src/UrlMapper/UrlMapperInterface.php

@@ -44,4 +44,20 @@ public function saveUrls(
     public function deleteUrls(
         $uuid
     );
+
+    /**
+     * Locate a URI provided the opposite URI.
+     *
+     * Given either the Drupal or Fedora URI, search the Gemini DB and return
+     * the other URI. Otherwise return null.
+     *
+     * @param string $uri
+     *   The known URI (either Fedora or Drupal).
+     *
+     * @return mixed array|null
+     *   The other URI if found.
+     */
+    public function findUrls(
+        $uri
+    );
 }

Gemini/src/app.php

@@ -28,6 +28,8 @@
     );
 };
 
+$app->get('/by_uri', "gemini.controller:getByUri");
+
 $app->get('/{uuid}', "gemini.controller:get");
 
 $app->post('/', "gemini.controller:post");

Gemini/tests/Islandora/Gemini/Tests/GetByUriTest.php

@@ -0,0 +1,163 @@
+<?php
+
+namespace Islandora\Gemini\Tests;
+
+use Islandora\Gemini\Controller\GeminiController;
+use Islandora\Gemini\UrlMapper\UrlMapperInterface;
+use Islandora\Gemini\UrlMinter\UrlMinterInterface;
+use PHPUnit\Framework\TestCase;
+use Prophecy\Argument;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\Routing\Generator\UrlGenerator;
+
+/**
+ * Class GetByUriTest
+ *
+ * @package Islandora\Gemini\Tests
+ * @coversDefaultClass \Islandora\Gemini\Controller\GeminiController
+ */
+class GetByUriTest extends TestCase
+{
+
+  /**
+   * @covers ::getByUri
+   */
+    public function testGetByUriOk()
+    {
+        $mapper = $this->prophesize(UrlMapperInterface::class);
+        $mapper->findUrls(Argument::any())
+        ->willReturn(['uri' => 'abc']);
+        $mapper = $mapper->reveal();
+
+        $minter = $this->prophesize(UrlMinterInterface::class)->reveal();
+
+        $generator = $this->prophesize(UrlGenerator::class)->reveal();
+
+        $request = new Request();
+        $request->headers->add(['X-Islandora-URI' => 'blah']);
+
+        $controller = new GeminiController(
+            $mapper,
+            $minter,
+            $generator
+        );
+
+        $response = $controller->getByUri($request);
+
+        $this->assertEquals(
+            200,
+            $response->getStatusCode(),
+            "Response must be 200 on success"
+        );
+        $this->assertTrue(
+            $response->headers->has('Location'),
+            "Response must have Location header"
+        );
+        $this->assertEquals(
+            'abc',
+            $response->headers->get('Location'),
+            "Location header should be 'abc'"
+        );
+    }
+
+  /**
+   * @covers ::getByUri
+   */
+    public function testGetByUriFailed()
+    {
+        $mapper = $this->prophesize(UrlMapperInterface::class);
+        $mapper->findUrls(Argument::any())
+        ->willReturn([]);
+        $mapper = $mapper->reveal();
+
+        $minter = $this->prophesize(UrlMinterInterface::class)->reveal();
+
+        $generator = $this->prophesize(UrlGenerator::class)->reveal();
+
+        $request = new Request();
+        $request->headers->add(['X-Islandora-URI' => 'blah']);
+
+        $controller = new GeminiController(
+            $mapper,
+            $minter,
+            $generator
+        );
+
+        $response = $controller->getByUri($request);
+
+        $this->assertEquals(
+            404,
+            $response->getStatusCode(),
+            "Response must be 200 on success"
+        );
+    }
+
+  /**
+   * @covers ::getByUri
+   */
+    public function testGetByUriMultiple()
+    {
+        $mapper = $this->prophesize(UrlMapperInterface::class);
+        $mapper->findUrls('foo')
+        ->willReturn(['uri' => 'abc']);
+        $mapper->findUrls('bar')
+        ->willReturn(['uri' => 'oops']);
+        $mapper = $mapper->reveal();
+
+        $minter = $this->prophesize(UrlMinterInterface::class)->reveal();
+
+        $generator = $this->prophesize(UrlGenerator::class)->reveal();
+
+        $request = new Request();
+        $request->headers->add(['X-Islandora-URI' => ['foo', 'bar']]);
+
+        $controller = new GeminiController(
+            $mapper,
+            $minter,
+            $generator
+        );
+
+        $response = $controller->getByUri($request);
+
+        $this->assertEquals(
+            200,
+            $response->getStatusCode(),
+            "Response must be 200 on success"
+        );
+        $this->assertTrue(
+            $response->headers->has('Location'),
+            "Response must have Location header"
+        );
+        $this->assertEquals(
+            'abc',
+            $response->headers->get('Location'),
+            "Location header should be 'abc'"
+        );
+    }
+
+  /**
+   * @covers ::getByUri
+   */
+    public function testGetByUriNoToken()
+    {
+        $mapper = $this->prophesize(UrlMapperInterface::class)->reveal();
+        $minter = $this->prophesize(UrlMinterInterface::class)->reveal();
+        $generator = $this->prophesize(UrlGenerator::class)->reveal();
+
+        $request = new Request();
+
+        $controller = new GeminiController(
+            $mapper,
+            $minter,
+            $generator
+        );
+
+        $response = $controller->getByUri($request);
+
+        $this->assertEquals(
+            400,
+            $response->getStatusCode(),
+            "Response must be 400 with no X-Islandora-URI header"
+        );
+    }
+}

Gemini/tests/Islandora/Gemini/Tests/UrlMapperTest.php

@@ -183,4 +183,33 @@ public function testDeleteUrlsRollsBackOnException()
         $mapper = new UrlMapper($connection);
         $mapper->deleteUrls("foo");
     }
+
+    /**
+     * @covers ::findUrls
+     */
+    public function testFindUrls()
+    {
+        // Simulate a record being returned.
+        $connection = $this->prophesize(Connection::class);
+        $connection->fetchAssoc(Argument::any(), Argument::any())
+          ->willReturn(['uri' => 'foo']);
+        $connection = $connection->reveal();
+        $mapper = new UrlMapper($connection);
+        $results = $mapper->findUrls("abc");
+        $this->assertTrue(
+            $results['uri'] == 'foo',
+            "getUrls() modified connection results.  Actual: ${results['uri']}. Expected: foo"
+        );
+        // Simulate when no record is found.
+        $connection = $this->prophesize(Connection::class);
+        $connection->fetchAssoc(Argument::any(), Argument::any())
+          ->willReturn([]);
+        $connection = $connection->reveal();
+        $mapper = new UrlMapper($connection);
+        $results = $mapper->findUrls("abc");
+        $this->assertTrue(
+            empty($results),
+            "getUrls() modified connection results.  Expected empty array, received " . json_encode($results)
+        );
+    }
 }