coalliance_multifile.module

<?php

function coalliance_multifile_menu() {
  $items = array();
  $items['islandora_co_manager/ingest_files'] = array(
    'title' => 'File Upload Form',
    'description' => 'Form to ingest files.',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('coalliance_multifile_ingest_form'),
    'access arguments' => array('add fedora datastreams'),
    'type' => MENU_CALLBACK,
  );
  return $items;
}

function coalliance_multifile_ingest_form(&$form_state, $pid = NULL) {
  if (!$pid) {
    $pid = variable_get('fedora_repository_pid', 'islandora:top');
  }
  elseif($pid == 'undefined') {
    $pid = variable_get('fedora_repository_pid', 'islandora:top');
  }

  $form = array(
      '#id' => 'coalliance-multifile-form',
  );
  $form['#attributes'] = array('enctype' => 'multipart/form-data');
  $form['pid'] = array(
    '#type' => 'hidden',
    '#value' => $pid,
  );
  $form['coalliance-files'] = array(
    '#type' => 'multifile',
    '#title' => t('Upload Files'),
    '#size' => 48,
    '#description' => t('Select files to be added the the object as datastreams.'),
    '#weight' => -1,
  );
  $form['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Ingest Files'),
  );
  return $form;
}

function coalliance_multifile_ingest_form_submit($form, &$form_state) {
  global $base_url;
  $pid = $form_state['values']['pid'];
  $form_state['redirect'] = $base_url . "/fedora/repository/{$pid}";
}

/**
 * Implements hook_elements()
 */
function coalliance_multifile_elements() {
  $type = array();
  $type['multifile'] = array(
    '#input' => TRUE,
    '#maxnumber' => '100',
    '#filetypes' => '',
  );
  return $type;
}

/**
* Implements hook_theme.
*/
function coalliance_multifile_theme() {
  return array(
    'multifile' => array('arguments' => array('element')),
  );
}


/**
* Theme hook for a multifile chooser
*
* @param $element the drupal element containing the multifile to be rendered
*/
function theme_multifile($element) {
  $path = drupal_get_path('module', 'coalliance_multifile');
  drupal_add_js($path . '/js/jquery.MultiFile.js');

  $item = theme('form_element',
                 $element,
                 '<input type="file" name="' .
                 $element['#name'] . '[]"' .
                 ($element['#attributes'] ? ' ' . drupal_attributes($element['#attributes']) : '') .
                 ' id="' . $element['#id'] .
                 '" class="multi"' .
                 ($element['#maxnumber'] ? 'maxlength="' . $element['#maxnumber'] . '" ' : '') .
                 ($element['#filetypes'] ? 'accept="' . $element['#filetypes'] . '" ' : '') .
                 'size="' .
                 $element['#size'] .
                 "\" />\n");
   return $item;
}

/**
* Turns a $_FILE array created by multifile into an array of arrays that
* the drupal file functions can handle. For some reason the file data is
* handled differently when we are using the multifile function.
*
* @param $file The $_FILE array to be transformed
* @param $name string The name of the multifile component
*
* @return array An array of arrays each containing a vaild $_FILE for a file
*/
function coalliance_multifile_array_mangler($file, $name) {
  if( empty($file[$name]['name']) )
    return array();
  
  $mangled = array();

  $i = 0;
  foreach( $file[$name]['name'] as $key => $filename ) {
    $mangled[$i]['files'] = array();
    $mangled[$i]['files']['name'] = array($name . $key => $file[$name]['name'][$i]);
    $mangled[$i]['files']['type'] = array($name . $key => $file[$name]['type'][$i]);
    $mangled[$i]['files']['tmp_name'] = array($name . $key => $file[$name]['tmp_name'][$i]);
    $mangled[$i]['files']['error'] = array($name . $key => $file[$name]['error'][$i]);
    $mangled[$i]['files']['size'] = array($name . $key => $file[$name]['size'][$i]);
    $i++;
  }

  return $mangled;
}

function coalliance_multifile_form_alter(&$form, &$form_state, $form_id) {
  if ($form_id == "coalliance_form_adapter_ingest_form") {
    if($form_state['storage']['step'] == 2) {
      $form['coalliance-files'] = array(
        '#type' => 'multifile',
        '#title' => t('Upload Files'),
        '#size' => 48,
        '#description' => t('Select files to be added the the object as datastreams.'),
        '#weight' => -1,
      );
      $form['#validate'][] = 'coalliance_multifile_validate_handler';
      $form['#submit'][] = 'coalliance_multifile_submit_handler';
    }
  }
  elseif ($form_id == "coalliance_multifile_ingest_form") {
    $form['#validate'][] = 'coalliance_multifile_validate_handler';
    $form['#submit'][] = 'coalliance_multifile_submit_handler';
  }
}

function coalliance_multifile_validate_handler($form, &$form_state) {
  if ($_FILES['coalliance-files']['error'][0] == 0) {
    module_load_include('inc', 'fedora_repository', 'ContentModel');
    module_load_include('inc', 'fedora_repository', 'MimeClass');

    $values = $form_state['values'];
    $form_state['values']['coalliance-files'] = array();

    $files = coalliance_multifile_array_mangler($_FILES, 'coalliance-files');
    $filetmp = $_FILES;
    
    foreach ($files as $key => $file) {
      $_FILES = $file;
      $file_object = file_save_upload('coalliance-files' . $key);
      file_move($file_object->filepath, 0, 'FILE_EXISTS_RENAME');
      $form_state['values']['coalliance-files'][$file_object->filename] = $file_object->filepath;
    }
    $_FILES = $filetmp;
    foreach ($form_state['values']['coalliance-files'] as $file) {
      $content_model = ContentModel::loadFromModel($values['content_model_pid'], $values['content_model_dsid']);
      if ($content_model !== FALSE) {
        $allowed_mime_types = $content_model->getMimetypes();
        $mime = new MimeClass();
        $mime_type = $mime->getType($file);
        if (!in_array($mime_type, $allowed_mime_types)) {
          $error = t("The uploaded file's mimetype ($mime_type) is not " .
                  "associated with this Content Model. The allowed types are " .
                  implode(' ', $allowed_mime_types));
          form_set_error('coalliance-files', $error);
          foreach ($form_state['values']['coalliance-files'] as $file)
            file_delete($file);
          return;
        }
      }
    }
  }
}

function coalliance_multifile_submit_handler($form, &$form_state) {
  $postvalues = array();
  
  // Need to loop through the $_POST to strreplace any instances of ~DOT~
  // and ~SPACE~ as PHP does not like these characters in the filename passed
  // through in the POST.
  foreach ($_POST as $key => $value) {
      $newkey = str_replace('~DOT~', '.', $key);
      $newkey = str_replace('~SPACE~', ' ', $newkey);
      $postvalues[$newkey] = $value;
  }
  
  if($form_state['values']['coalliance-files']) {
    module_load_include('inc', 'fedora_repository', 'api/fedora_util');
    module_load_include('inc', 'fedora_repository', 'api/fedora_item');
    module_load_include('inc', 'fedora_repository', 'MimeClass');

    $files = $form_state['values']['coalliance-files'];
    $item = new Fedora_Item($form_state['values']['pid']);
    $mime = new MimeClass();

    foreach($files as $dsid => $file) {
      // Set the label if POSTed.
      if (array_key_exists($dsid, $postvalues)) {
          $label = $postvalues[$dsid];
      }
      else {
        $label = $dsid;
      }
      $dsid = fix_dsid($dsid);
      $mimetype = $mime->getType($file);
      $item->add_datastream_from_file($file, $dsid, $label, $mimetype);
      file_delete($file);
    }
  }
}