<?php
// $Id$

/**
 * @file
 * Tests file uploading through the File module.
 */

/**
 * This class provides methods specifically for testing File's field handling.
 */
class FileFieldTestCase extends DrupalWebTestCase {
  protected $admin_user;

  function setUp() {
    parent::setUp('file');
    $this->admin_user = $this->drupalCreateUser(array('access content', 'access administration pages', 'administer site configuration', 'administer content types', 'administer nodes', 'create article content', 'edit any article content', 'delete any article content', 'administer files'));
    $this->drupalLogin($this->admin_user);
  }

  /**
   * Get a sample file of the specified type.
   */
  function getTestFile($type_name, $size = NULL) {
    // Get a file to upload.
    $file = current($this->drupalGetTestFiles($type_name, $size));

    // Add a filesize property to files as would be read by file_load().
    $file->filesize = filesize($file->uri);

    return $file;
  }

  /**
   * Create a new file field.
   *
   * @param $name
   *   The name of the new field (all lowercase), exclude the "field_" prefix.
   * @param $type_name
   *   The node type that this field will be added to.
   * @param $field_settings
   *   A list of field settings that will be added to the defaults.
   * @param $instance_settings
   *   A list of instance settings that will be added to the instance defaults.
   * @param $widget_settings
   *   A list of widget settings that will be added to the widget defaults.
   */
  function createFileField($name, $type_name, $field_settings = array(), $instance_settings = array(), $widget_settings = array()) {
    $field = array(
      'field_name' => $name,
      'type' => 'file',
      'settings' => array(),
      'cardinality' => !empty($field_settings['cardinality']) ? $field_settings['cardinality'] : 1,
    );
    $field['settings'] = array_merge($field['settings'], $field_settings);
    field_create_field($field);

    $instance = array(
      'field_name' => $field['field_name'],
      'label' => $name,
      'bundle' => $type_name,
      'required' => !empty($instance_settings['required']),
      'settings' => array(),
      'widget' => array(
        'type' => 'file_generic',
        'settings' => array(),
      ),
    );
    $instance['settings'] = array_merge($instance['settings'], $instance_settings);
    $instance['widget']['settings'] = array_merge($instance['widget']['settings'], $widget_settings);
    field_create_instance($instance);
  }

  /**
   * Update an existing file field with new settings.
   */
  function updateFileField($name, $type_name, $instance_settings = array(), $widget_settings = array()) {
    $field = field_info_field($name);
    $instance = field_info_instance($name, $type_name);
    $instance['settings'] = array_merge($instance['settings'], $instance_settings);
    $instance['widget']['settings'] = array_merge($instance['widget']['settings'], $widget_settings);

    field_update_instance($instance);
  }

  /**
   * Upload a file to a node.
   */
  function uploadNodeFile($file, $field_name, $nid_or_type, $new_revision = TRUE) {
    $edit = array(
      'title' => $this->randomName(),
      'revision' => (string) (int) $new_revision,
    );

    if (is_numeric($nid_or_type)) {
      $node = node_load($nid_or_type);
      $delta = isset($node->$field_name) ? count($node->$field_name) : 0;
      $edit['files[' . $field_name . '_' . FIELD_LANGUAGE_NONE . '_' . $delta . ']'] = realpath($file->uri);
      $this->drupalPost('node/' . $nid_or_type . '/edit', $edit, t('Save'));
    }
    else {
      $edit['files[' . $field_name . '_' . FIELD_LANGUAGE_NONE . '_0]'] = realpath($file->uri);
      $type_name = str_replace('_', '-', $nid_or_type);
      $this->drupalPost('node/add/' . $type_name, $edit, t('Save'));
    }

    $matches = array();
    preg_match('/node\/([0-9]+)/', $this->getUrl(), $matches);
    return isset($matches[1]) ? $matches[1] : FALSE;
  }

  /**
   * Remove a file from a node.
   *
   * Note that if replacing a file, it must first be removed then added again.
   */
  function removeNodeFile($nid, $new_revision = TRUE) {
    $edit = array(
      'revision' => (string) (int) $new_revision,
    );

    $this->drupalPost('node/' . $nid . '/edit', array(), t('Remove'));
    $this->drupalPost(NULL, $edit, t('Save'));
  }

  /**
   * Replace a file within a node.
   */
  function replaceNodeFile($file, $field_name, $nid, $new_revision = TRUE) {
    $edit = array(
      'files[' . $field_name . '_' . FIELD_LANGUAGE_NONE . '_0]' => realpath($file->uri),
      'revision' => (string) (int) $new_revision,
    );

    $this->drupalPost('node/' . $nid . '/edit', array(), t('Remove'));
    $this->drupalPost(NULL, $edit, t('Save'));
  }

  /**
   * Assert that a file exists physically on disk.
   */
  function assertFileExists($file, $message = NULL) {
    $message = isset($message) ? $message : t('File %file exists on the disk.', array('%file' => $file->uri));
    $this->assertTrue(is_file($file->uri), $message);
  }

  /**
   * Assert that a file exists in the database.
   */
  function assertFileEntryExists($file, $message = NULL) {
    drupal_static_reset('file_load_multiple');
    $db_file = file_load($file->fid);
    $message = isset($message) ? $message : t('File %file exists in database at the correct path.', array('%file' => $file->uri));
    $this->assertEqual($db_file->uri, $file->uri, $message);
  }

  /**
   * Assert that a file does not exist on disk.
   */
  function assertFileNotExists($file, $message = NULL) {
    $message = isset($message) ? $message : t('File %file exists on the disk.', array('%file' => $file->uri));
    $this->assertFalse(is_file($file->uri), $message);
  }

  /**
   * Assert that a file does not exist in the database.
   */
  function assertFileEntryNotExists($file, $message) {
    drupal_static_reset('file_load_multiple');
    $message = isset($message) ? $message : t('File %file exists in database at the correct path.', array('%file' => $file->uri));
    $this->assertFalse(file_load($file->fid), $message);
  }
}

/**
 * Test class to test file handling with node revisions.
 */
class FileFieldRevisionTestCase extends FileFieldTestCase {
  public function getInfo() {
    return array(
      'name' => t('File field revision test'),
      'description' => t('Test creating and deleting revisions with files attached.'),
      'group' => t('File'),
    );
  }

  /**
   * Test creating multiple revisions of a node and managing the attached files.
   *
   * Expected behaviors:
   *  - Adding a new revision will make another entry in the field table, but
   *    the original file will not be duplicated.
   *  - Deleting a revision should not delete the original file if the file
   *    is in use by another revision.
   *  - When the last revision that uses a file is deleted, the original file
   *    should be deleted also.
   */
  function testRevisions() {
    $type_name = 'article';
    $field_name = 'field_' . strtolower($this->randomName());
    $this->createFileField($field_name, $type_name);
    $field = field_info_field($field_name);
    $instance = field_info_instance($field_name, $type_name);

    $test_file = $this->getTestFile('text');

    // Create a new node with the uploaded file.
    $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);

    // Check that the file exists on disk and in the database.
    $node = node_load($nid, NULL, TRUE);
    $node_file_r1 = (object) $node->{$field_name}[FIELD_LANGUAGE_NONE][0];
    $node_vid_r1 = $node->vid;
    $this->assertFileExists($node_file_r1, t('New file saved to disk on node creation.'));
    $this->assertFileEntryExists($node_file_r1, t('File entry exists in database on node creation.'));

    // Upload another file to the same node in a new revision.
    $this->replaceNodeFile($test_file, $field_name, $nid);
    $node = node_load($nid, NULL, TRUE);
    $node_file_r2 = (object) $node->{$field_name}[FIELD_LANGUAGE_NONE][0];
    $node_vid_r2 = $node->vid;
    $this->assertFileExists($node_file_r2, t('Replacement file exists on disk after creating new revision.'));
    $this->assertFileEntryExists($node_file_r2, t('Replacement file entry exists in database after creating new revision.'));

    // Check that the original file is still in place on the first revision.
    $node = node_load($nid, $node_vid_r1, TRUE);
    $this->assertEqual($node_file_r1, (object) $node->{$field_name}[FIELD_LANGUAGE_NONE][0], t('Original file still in place after replacing file in new revision.'));
    $this->assertFileExists($node_file_r1, t('Original file still in place after replacing file in new revision.'));
    $this->assertFileEntryExists($node_file_r1, t('Original file entry still in place after replacing file in new revision'));

    // Save a new version of the node without any changes.
    // Check that the file is still the same as the previous revision.
    $this->drupalPost('node/' . $nid . '/edit', array('revision' => '1'), t('Save'));
    $node = node_load($nid, NULL, TRUE);
    $node_file_r3 = (object) $node->{$field_name}[FIELD_LANGUAGE_NONE][0];
    $node_vid_r3 = $node->vid;
    $this->assertEqual($node_file_r2, $node_file_r3, t('Previous revision file still in place after creating a new revision without a new file.'));

    // Revert to the first revision and check that the original file is active.
    $this->drupalPost('node/' . $nid . '/revisions/' . $node_vid_r1 . '/revert', array(), t('Revert'));
    $node = node_load($nid, NULL, TRUE);
    $node_file_r4 = (object) $node->{$field_name}[FIELD_LANGUAGE_NONE][0];
    $node_vid_r4 = $node->vid;
    $this->assertEqual($node_file_r1, $node_file_r4, t('Original revision file still in place after reverting to the original revision.'));

    // Delete the second revision and check that the file is kept (since it is
    // still being used by the third revision).
    $this->drupalPost('node/' . $nid . '/revisions/' . $node_vid_r2 . '/delete', array(), t('Delete'));
    $this->assertFileExists($node_file_r3, t('Second file is still available after deleting second revision, since it is being used by the third revision.'));
    $this->assertFileEntryExists($node_file_r3, t('Second file entry is still available after deleting second revision, since it is being used by the third revision.'));

    // Delete the third revision and check that the file is deleted also.
    $this->drupalPost('node/' . $nid . '/revisions/' . $node_vid_r3 . '/delete', array(), t('Delete'));
    // TODO: This seems like a bug in File API. Clearing the stat cache should
    // not be necessary here. The file really is deleted, but stream wrappers
    // doesn't seem to think so unless we clear the PHP file stat() cache.
    clearstatcache();
    $this->assertFileNotExists($node_file_r3, t('Second file is now deleted after deleting third revision, since it is no longer being used by any other nodes.'));
    $this->assertFileEntryNotExists($node_file_r3, t('Second file entry is now deleted after deleting third revision, since it is no longer being used by any other nodes.'));

    // Delete the entire node and check that the original file is deleted.
    $this->drupalPost('node/' . $nid . '/delete', array(), t('Delete'));
    $this->assertFileNotExists($node_file_r1, t('Original file is deleted after deleting the entire node with two revisions remaining.'));
    $this->assertFileEntryNotExists($node_file_r1, t('Original file entry is deleted after deleting the entire node with two revisions remaining.'));
  }
}

/**
 * Test class to check that formatters are working properly.
 */
class FileFieldDisplayTestCase extends FileFieldTestCase {
  public function getInfo() {
    return array(
      'name' => t('File field display tests'),
      'description' => t('Test the display of file fields in node and views.'),
      'group' => t('File'),
    );
  }

  /**
   * Test normal formatter display on node display.
   */
  function testNodeDisplay() {
    $field_name = 'field_' . strtolower($this->randomName());
    $type_name = 'article';
    $field_settings = array(
      'display_field' => '1',
      'display_default' => '1',
    );
    $instance_settings = array();
    $widget_settings = array(
      'description_field' => '1',
    );
    $this->createFileField($field_name, $type_name, $field_settings, $instance_settings, $widget_settings);
    $field = field_info_field($field_name);
    $instance = field_info_instance($field_name, $type_name);

    $test_file = $this->getTestFile('text');

    // Create a new node with the uploaded file.
    $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);
    $this->drupalGet('node/' . $nid . '/edit');

    // Check that the default formatter is displaying with the file name.
    $node = node_load($nid, NULL, TRUE);
    $node_file = (object) $node->{$field_name}[FIELD_LANGUAGE_NONE][0];
    $default_output = theme('file_link', $node_file);
    $this->assertRaw($default_output, t('Default formatter displaying correctly on full node view.'));

    // Turn the "display" option off and check that the file is no longer displayed.
    $edit = array($field_name . '[' . FIELD_LANGUAGE_NONE . '][0][display]' => FALSE);
    $this->drupalPost('node/' . $nid . '/edit', $edit, t('Save'));

    $this->assertNoRaw($default_output, t('Field is hidden when "display" option is unchecked.'));

  }
}

/**
 * Test class to check for various validations.
 */
class FileFieldValidateTestCase extends FileFieldTestCase {
  protected $field;
  protected $node_type;

  public function getInfo() {
    return array(
      'name' => t('File field validation tests'),
      'description' => t('Tests validation functions such as file type, max file size, max size per node, and required.'),
      'group' => t('File'),
    );
  }

  /**
   * Test required property on file fields.
   */
  function testRequired() {
    $type_name = 'article';
    $field_name = 'field_' . strtolower($this->randomName());
    $this->createFileField($field_name, $type_name, array(), array('required' => '1'));
    $field = field_info_field($field_name);
    $instance = field_info_instance($field_name, $type_name);

    $test_file = $this->getTestFile('text');

    // Try to post a new node without uploading a file.
    $edit = array('title' => $this->randomName());
    $this->drupalPost('node/add/' . $type_name, $edit, t('Save'));
    $this->assertRaw(t('!title field is required.', array('!title' => $instance['label'])), t('Node save failed when required file field was empty.'));

    // Create a new node with the uploaded file.
    $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);
    $node = node_load($nid, NULL, TRUE);

    $node_file = (object) $node->{$field_name}[FIELD_LANGUAGE_NONE][0];
    $this->assertFileExists($node_file, t('File exists after uploading to the required field.'));
    $this->assertFileEntryExists($node_file, t('File entry exists after uploading to the required field.'));

    // Try again with a multiple value field.
    field_delete_field($field_name);
    $this->createFileField($field_name, $type_name, array('cardinality' => FIELD_CARDINALITY_UNLIMITED), array('required' => '1'));

    // Try to post a new node without uploading a file in the multivalue field.
    $edit = array('title' => $this->randomName());
    $this->drupalPost('node/add/' . $type_name, $edit, t('Save'));
    $this->assertRaw(t('!title field is required.', array('!title' => $instance['label'])), t('Node save failed when required multiple value file field was empty.'));

    // Create a new node with the uploaded file into the multivalue field.
    $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);
    $node = node_load($nid, NULL, TRUE);
    $node_file = (object) $node->{$field_name}[FIELD_LANGUAGE_NONE][0];
    $this->assertFileExists($node_file, t('File exists after uploading to the required multiple value field.'));
    $this->assertFileEntryExists($node_file, t('File entry exists after uploading to the required multipel value field.'));

    // Remove our file field.
    field_delete_field($field_name);
  }

  /**
   * Test the max file size validator.
   */
  function testFileMaxSize() {
    $type_name = 'article';
    $field_name = 'field_' . strtolower($this->randomName());
    $this->createFileField($field_name, $type_name, array(), array('required' => '1'));
    $field = field_info_field($field_name);
    $instance = field_info_instance($field_name, $type_name);

    $small_file = $this->getTestFile('text', 131072); // 128KB.
    $large_file = $this->getTestFile('text', 1310720); // 1.2MB

    // Test uploading both a large and small file with different increments.
    $sizes = array(
      '1M' => 1048576,
      '1024K' => 1048576,
      '1048576' => 1048576,
    );

    foreach ($sizes as $max_filesize => $file_limit) {
      // Set the max file upload size.
      $this->updateFileField($field_name, $type_name, array('max_filesize' => $max_filesize));
      $instance = field_info_instance($field_name, $type_name);

      // Create a new node with the small file, which should pass.
      $nid = $this->uploadNodeFile($small_file, $field_name, $type_name);
      $node = node_load($nid, NULL, TRUE);
      $node_file = (object) $node->{$field_name}[FIELD_LANGUAGE_NONE][0];
      $this->assertFileExists($node_file, t('File exists after uploading a file (%filesize) under the max limit (%maxsize).', array('%filesize' => format_size($small_file->filesize), '%maxsize' => $max_filesize)));
      $this->assertFileEntryExists($node_file, t('File entry exists after uploading a file (%filesize) under the max limit (%maxsize).', array('%filesize' => format_size($small_file->filesize), '%maxsize' => $max_filesize)));

      // Check that uploading the large file fails (1M limit).
      $nid = $this->uploadNodeFile($large_file, $field_name, $type_name);
      $error_message = t('The file is %filesize exceeding the maximum file size of %maxsize.', array('%filesize' => format_size($large_file->filesize), '%maxsize' => format_size($file_limit)));
      $this->assertRaw($error_message, t('Node save failed when file (%filesize) exceeded the max upload size (%maxsize).', array('%filesize' => format_size($large_file->filesize), '%maxsize' => $max_filesize)));
    }

    // Turn off the max filesize.
    $this->updateFileField($field_name, $type_name, array('max_filesize' => ''));

    // Upload the big file successfully.
    $nid = $this->uploadNodeFile($large_file, $field_name, $type_name);
    $node = node_load($nid, NULL, TRUE);
    $node_file = (object) $node->{$field_name}[FIELD_LANGUAGE_NONE][0];
    $this->assertFileExists($node_file, t('File exists after uploading a file (%filesize) with no max limit.', array('%filesize' => format_size($large_file->filesize))));
    $this->assertFileEntryExists($node_file, t('File entry exists after uploading a file (%filesize) with no max limit.', array('%filesize' => format_size($large_file->filesize))));

    // Remove our file field.
    field_delete_field($field_name);
  }

  /**
   * Test the file extension, do additional checks if mimedetect is installed.
   */
  function testFileExtension() {
    $type_name = 'article';
    $field_name = 'field_' . strtolower($this->randomName());
    $this->createFileField($field_name, $type_name);
    $field = field_info_field($field_name);
    $instance = field_info_instance($field_name, $type_name);

    // Get the test file (a GIF image).
    $test_file = $this->getTestFile('image');

    // Disable extension checking.
    $this->updateFileField($field_name, $type_name, array('file_extensions' => ''));

    // Check that the file can be uploaded with no extension checking.
    $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);
    $node = node_load($nid, NULL, TRUE);
    $node_file = (object) $node->{$field_name}[FIELD_LANGUAGE_NONE][0];
    $this->assertFileExists($node_file, t('File exists after uploading a file with no extension checking.'));
    $this->assertFileEntryExists($node_file, t('File entry exists after uploading a file with no extension checking.'));

    // Enable extension checking for text files.
    $this->updateFileField($field_name, $type_name, array('file_extensions' => 'txt'));

    // Check that the file with the wrong extension cannot be uploaded.
    $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);
    $error_message = t('Only files with the following extensions are allowed: %files-allowed.', array('%files-allowed' => 'txt'));
    $this->assertRaw($error_message, t('Node save failed when file uploaded with the wrong extension.'));

    // Enable extension checking for text and image files.
    $this->updateFileField($field_name, $type_name, array('file_extensions' => 'txt gif'));

    // Check that the file can be uploaded with extension checking.
    $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);
    $node = node_load($nid, NULL, TRUE);
    $node_file = (object) $node->{$field_name}[FIELD_LANGUAGE_NONE][0];
    $this->assertFileExists($node_file, t('File exists after uploading a file with extension checking.'));
    $this->assertFileEntryExists($node_file, t('File entry exists after uploading a file with extension checking.'));

    // Remove our file field.
    field_delete_field($field_name);
  }
}

/**
 * Test class to check that files are uploaded to proper locations.
 */
class FileFieldPathTestCase extends FileFieldTestCase {
  function getInfo() {
    return array(
      'name' => t('File field file path tests'),
      'description' => t('Test that files are uploaded to the proper location with token support.'),
      'group' => t('File'),
    );
  }

  /**
   * Test normal formatter display on node display.
   */
  function testUploadPath() {
    $field_name = 'field_' . strtolower($this->randomName());
    $type_name = 'article';
    $field = $this->createFileField($field_name, $type_name);
    $test_file = $this->getTestFile('text');

    // Create a new node.
    $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);

    // Check that the file was uploaded to the file root.
    $node = node_load($nid, NULL, TRUE);
    $node_file = (object) $node->{$field_name}[FIELD_LANGUAGE_NONE][0];
    $this->assertPathMatch('public://' . $test_file->filename, $node_file->uri, t('The file %file was uploaded to the correct path.', array('%file' => $node_file->uri)));

    // Change the path to contain multiple subdirectories.
    $field = $this->updateFileField($field_name, $type_name, array('file_directory' => 'foo/bar/baz'));

    // Upload a new file into the subdirectories.
    $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);

    // Check that the file was uploaded into the subdirectory.
    $node = node_load($nid, NULL, TRUE);
    $node_file = (object) $node->{$field_name}[FIELD_LANGUAGE_NONE][0];
    $this->assertPathMatch('public://foo/bar/baz/' . $test_file->filename, $node_file->uri, t('The file %file was uploaded to the correct path.', array('%file' => $node_file->uri)));

    // Check the path when used with tokens.
    // Change the path to contain multiple token directories.
    $field = $this->updateFileField($field_name, $type_name, array('file_directory' => '[user:uid]/[user:name]'));

    // Upload a new file into the token subdirectories.
    $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);

    // Check that the file was uploaded into the subdirectory.
    $node = node_load($nid, NULL, TRUE);
    $node_file = (object) $node->{$field_name}[FIELD_LANGUAGE_NONE][0];
    $data = array('user' => $this->admin_user);
    $subdirectory = token_replace('[user:uid]/[user:name]', $data);
    $this->assertPathMatch('public://' . $subdirectory . '/' . $test_file->filename, $node_file->uri, t('The file %file was uploaded to the correct path with token replacements.', array('%file' => $node_file->uri)));
  }

  /**
   * A loose assertion to check that a file is uploaded to the right location.
   *  
   * @param $expected_path
   *   The location where the file is expected to be uploaded. Duplicate file
   *   names to not need to be taken into account.
   * @param $actual_path
   *   Where the file was actually uploaded.
   * @param $message
   *   The message to display with this assertion.
   */
  function assertPathMatch($expected_path, $actual_path, $message) {
    // Strip off the extension of the expected path to allow for _0, _1, etc.
    // suffixes when the file hits a duplicate name.
    $pos = strrpos($expected_path, '.');
    $base_path = substr($expected_path, 0, $pos);
    $extension = substr($expected_path, $pos + 1);

    $result = preg_match('/' . preg_quote($base_path, '/') . '(_[0-9]+)?\.' . preg_quote($extension, '/') . '/', $actual_path);
    $this->assertTrue($result, $message);
  }
}