<?php

/**
 * @file
 * Tests to verify the cache headers we provide.
 */

/**
 * Datastream caching tests.
 */
class IslandoraDatastreamCacheTestCase extends IslandoraWebTestCase {

  /**
   * Gets info to display to describe this test.
   *
   * @see IslandoraWebTestCase::getInfo()
   */
  public static function getInfo() {
    return array(
      'name' => 'Datastream Cache Headers',
      'description' => 'Check our headers work as we expect them to.',
      'group' => 'Islandora',
    );
  }

  /**
   * Creates an admin user and a connection to a fedora repository.
   *
   * @see IslandoraWebTestCase::setUp()
   */
  public function setUp() {
    parent::setUp();
    $this->repository = $this->admin->repository;
    $this->purgeTestObjects();
  }

  /**
   * Free any objects/resources created for this test.
   *
   * @see IslandoraWebTestCase::tearDown()
   */
  public function tearDown() {
    $this->purgeTestObjects();
    parent::tearDown();
  }

  /**
   * Purge any objects created by the test's in this class.
   */
  public function purgeTestObjects() {
    $objects = array(
      'test:test',
    );
    foreach ($objects as $object) {
      try {
        $object = $this->repository->getObject($object);
        $this->repository->purgeObject($object->id);
      }
      catch (Exception $e) {
        // Meh... Either it didn't exist or the purge failed.
      }
    }
  }

  /**
   * Create our test object.
   */
  protected function createTestObject() {
    $object = $this->repository->constructObject('test:test');
    $object->label = 'Test object';
    $object->models = 'test:model';
    $datastream = $object->constructDatastream('asdf', 'M');
    $datastream->label = 'datastream of doom';
    $datastream->mimetype = 'text/plain';
    $datastream->content = 'And then things happened.';
    $datastream->checksumType = 'SHA-1';
    $object->ingestDatastream($datastream);
    $this->repository->ingestObject($object);
    return $object;
  }

  /**
   * Test HTTP cache headers.
   */
  public function testCacheHeaders() {
    $object = $this->createTestObject();
    $datastream = $object['asdf'];

    $user = $this->drupalCreateUser(array(ISLANDORA_VIEW_OBJECTS));
    $this->drupalLogin($user);

    // Test If-Modified-Since.
    $result = $this->drupalGet("islandora/object/{$object->id}/datastream/{$datastream->id}/view", array(), array(
      'If-Modified-Since: ' . $datastream->createdDate->format('D, d M Y H:i:s \G\M\T'),
    ));
    $this->assertResponse(304);
    $result = $this->drupalGet("islandora/object/{$object->id}/datastream/{$datastream->id}/view", array(), array(
      'If-Modified-Since: ' . $datastream->createdDate->sub(new DateInterval('P1M'))->format('D, d M Y H:i:s \G\M\T'),
    ));
    $this->assertResponse(200);

    // Test If-Unmodified-Since.
    $result = $this->drupalGet("islandora/object/{$object->id}/datastream/{$datastream->id}/view", array(), array(
      'If-Unmodified-Since: ' . $datastream->createdDate->format('D, d M Y H:i:s \G\M\T'),
    ));
    $this->assertResponse(200);
    $result = $this->drupalGet("islandora/object/{$object->id}/datastream/{$datastream->id}/view", array(), array(
      'If-Unmodified-Since: ' . $datastream->createdDate->sub(new DateInterval('P1M'))->format('D, d M Y H:i:s \G\M\T'),
    ));
    $this->assertResponse(412);

    // Test If-Match.
    $result = $this->drupalGet("islandora/object/{$object->id}/datastream/{$datastream->id}/view", array(), array(
      format_string('If-Match: "!checksum"', array(
        '!checksum' => $datastream->checksum,
      )),
    ));
    $this->assertResponse(200);
    $result = $this->drupalGet("islandora/object/{$object->id}/datastream/{$datastream->id}/view", array(), array(
      format_string('If-Match: "!checksum"', array(
        '!checksum' => 'dont-match' . $datastream->checksum,
      )),
    ));
    $this->assertResponse(412);

    // Test If-None-Match.
    $result = $this->drupalGet("islandora/object/{$object->id}/datastream/{$datastream->id}/view", array(), array(
      format_string('If-None-Match: "!checksum"', array(
        '!checksum' => $datastream->checksum,
      )),
    ));
    $this->assertResponse(304);
    $result = $this->drupalGet("islandora/object/{$object->id}/datastream/{$datastream->id}/view", array(), array(
      format_string('If-None-Match: "!checksum"', array(
        '!checksum' => 'dont-match' . $datastream->checksum,
      )),
    ));
    $this->assertResponse(200);

    // Test combination of If-None-Match and If-Modified-Since.
    $result = $this->drupalGet("islandora/object/{$object->id}/datastream/{$datastream->id}/view", array(), array(
      'If-Modified-Since: ' . $datastream->createdDate->format('D, d M Y H:i:s \G\M\T'),
      format_string('If-None-Match: "!checksum"', array(
        '!checksum' => $datastream->checksum,
      )),
    ));
    $this->assertResponse(304);
    $result = $this->drupalGet("islandora/object/{$object->id}/datastream/{$datastream->id}/view", array(), array(
      'If-Modified-Since: ' . $datastream->createdDate->format('D, d M Y H:i:s \G\M\T'),
      format_string('If-None-Match: "!checksum"', array(
        '!checksum' => 'dont-match' . $datastream->checksum,
      )),
    ));
    $this->assertResponse(200);
    $result = $this->drupalGet("islandora/object/{$object->id}/datastream/{$datastream->id}/view", array(), array(
      'If-Modified-Since: ' . $datastream->createdDate->sub(new DateInterval('P1M'))->format('D, d M Y H:i:s \G\M\T'),
      format_string('If-None-Match: "!checksum"', array(
        '!checksum' => $datastream->checksum,
      )),
    ));
    $this->assertResponse(200);
  }

}