commit after adding the array checks again

RestConnection.inc

@@ -13,9 +13,32 @@ require_once 'sites/all/libraries/tuque/FedoraRelationships.php';
 
 class RestConnection {
 
+  /**
+   * Connection to the repository
+   *
+   * @var RepositoryConnection
+   */
   public $connection = NULL;
+
+  /**
+   * The Fedora API we are using
+   *
+   * @var FedoraAPI
+   */
   public $api = NULL;
+
+  /**
+   * The cache we use to connect.
+   *
+   * @var SimpleCache
+   */
   public $cache = NULL;
+
+  /**
+   * The repository object.
+   *
+   * @var FedoraRepository
+   */
   public $repository = NULL;
 
   function RestConnection($user) {

includes/ingest-menu.inc

@@ -22,7 +22,7 @@ function islandora_ingest_callback($collection_pid) {
   }
   elseif ($registry_count == 1) {
     // One registry implementation, go there
-    drupal_goto($ingest_registry[0]['url']);
+    drupal_goto($ingest_registry[0]['url'] . "/$collection_pid");
   }
   else {
     // Multiple ingest routes registered
@@ -37,7 +37,7 @@ function islandora_ingest_registry_render($ingest_registry) {
     '#markup' => '',
   );
   foreach ($ingest_registry AS $ingest_route) {
-    $output['#markup'] .= l($ingest_route['name'], $ingest_route['url']) . '<br/>';
+    $output['#markup'] .= l($ingest_route['name'], $ingest_route['url']. "/$collection_pid") . '<br/>';
   }
   return $output;
 }

includes/islandora.ingest.inc

@@ -0,0 +1,27 @@
+<?php
+
+function islandora_ingest_get_information(AbstractFedoraObject $collection_object) {
+  $models = $collection_object->models;
+  $collection_info = module_invoke_all('islandora_ingest_get_information', $models, $collection_object);
+
+  return $collection_info;
+}
+
+function islandora_ingest_get_object($content_models, $collection_pid, $relationship, $namespace) {
+  module_load_include('inc', 'islandora', 'RestConnection');
+  global $user;
+  $connection = new RestConnection($user);
+  $object = $connection->repository->constructObject($namespace);
+  foreach($content_models as $contentmodel) {
+    $object->relationships->add(FEDORA_MODEL_URI, 'hasModel', $content_model);
+  }
+  $object->relationships->add($relationship['uri'], $relationship['value'], $collection_pid);
+  module_invoke_all('islandora_ingest_pre_ingest', $object, $content_models, $collection_pid);
+  return $object;
+}
+
+function islandora_ingest_add_object(&$object) {
+  $object->repository->ingestObject($object);
+  module_invoke_all('islandora_ingest_post_ingest', $object);
+  return $object;
+}

islandora.module

@@ -98,9 +98,12 @@ function islandora_menu() {
     'access arguments' => array(FEDORA_VIEW),
   );
 
+
   $items['islandora/object/%/add'] = array(
-    'title' => 'Add stream',
+    'title' => 'Add to an object',
-    'page callback' => 'islandora_add_stream',
+    'file' => 'includes/add-menu.inc',
+    'page callback' => 'islandora_add_callback',
+    'page arguments' => array(2),
     'type' => MENU_NORMAL_ITEM,
     'access arguments' => array(FEDORA_ADD_DS)
   );
@@ -158,7 +161,7 @@ function islandora_menu() {
 
   $items['islandora/object/%/datastream/%/edit'] = array(
     'title' => 'Edit datastream',
-    'page callback' => 'islandora_edit_stream',
+    'page callback' => 'islandora_edit_datastream',
     'page arguments' => array(2, 4),
     'type' => MENU_CALLBACK,
     'access arguments' => array(FEDORA_METADATA_EDIT),
@@ -166,7 +169,7 @@ function islandora_menu() {
 
   $items['islandora/object/%/datastream/%/delete'] = array(
     'title' => 'Purge data stream',
-    'page callback' => 'islandora_purge_stream',
+    'page callback' => 'islandora_purge_datastream',
     'page arguments' => array(2, 4),
     'type' => MENU_CALLBACK,
     'access arguments' => array(FEDORA_PURGE),
@@ -233,7 +236,7 @@ function islandora_purge_object($object_id) {
     $restConnection = new RestConnection($user);
     $fedora_object = new FedoraObject($object_id, $restConnection->repository);
   } catch (Exception $e) {
-    drupal_set_message(t('Error getting Islandora object %s', array('%s' => $object_id)), 'error');
+    drupal_set_message(t('Error getting Islandora object %s %e', array('%s' => $object_id, '%e' => $e)), 'error');
     return "";
   }
   if (!isset($fedora_object)) {
@@ -242,11 +245,11 @@ function islandora_purge_object($object_id) {
   }
   $content_models = $fedora_object->models;
   $arr = module_invoke_all('islandora_pre_purge_object', $fedora_object); //notify modules of pending deletion
-  if ($arr['delete']) {
+  if (isset($arr['delete']) && $arr['delete']) {
     try {
       $fedora_object->delete();
     } catch (Exception $e) {
-      drupal_set_message(t('Error deleting Islandora object %s', array('%s' => $object_id)), 'error');
+      drupal_set_message(t('Error deleting Islandora object %s %e', array('%s' => $object_id, '%e' => $e)), 'error');
       return "";
     }
   }
@@ -254,17 +257,16 @@ function islandora_purge_object($object_id) {
     try {
       $restConnection->repository->purgeObject($object_id);
     } catch (Exception $e) {
-      drupal_set_message(t('Error purging Islandora object %s', array('%s' => $object_id)), 'error');
+      drupal_set_message(t('Error purging Islandora object %s %e', array('%s' => $object_id, '%e' => $e)), 'error');
       return "";
     }
   }
   module_invoke_all('islandora_post_purge_object', $object_id, $content_models);  //notify modules post deletion
+  drupal_goto('islandora');
 }
 
 /**
  * returns an array listing object types provided by sub modules
- * The array should contain the cmodels it listens for and the hooks it answers to
- * example array ('islandora:collectionCModel' => array ('islandora_edit_object' => TRUE, 'islandora_view_object' => TRUE);
  * @return array 
  */
 function islandora_get_types() {
@@ -294,13 +296,12 @@ function islandora_edit_object($object_id) {
   foreach ($arr as $key => $value) {
     $output .= $key . '<br />' . $value; //if we have multiple modules handle one cmodel we need to iterate over multiple
   }
+  //we could do another module invoke all here to build the edit tab with a default implemented in this module?
   return $output;
 }
 
 /**
- * checks to see if any other modules implement this functionality and if there are none
  * builds a default page for the edit tab
- * 
  * @param object $fedora_object 
  *   A tuque Fedora Object
  */
@@ -317,22 +318,67 @@ function islandora_islandora_edit_object($fedora_object) {
 }
 
 /**
+ * Gives the option of purging or deleting a datastream.
  * 
- * @paramstring $datastream_id
+ * The default behaviour is to purge the datastream but this can be overridden using the 
- * @return type 
+ * 'islandora_pre_purge_datastream' hook. The returned array can include a 'block' => TRUE 
+ * pair which will prevent the datastream from being deleted if it particularly needed for 
+ * a certain function. Returning 'delete' => TRUE will cause the datastream to be put into 
+ * a deleted state.
+ * 
+ * @param string $object_id
+ *   ID of the object
+ * @param string $datastream_id
+ *   ID of the datastream
+ *   
  */
 function islandora_purge_datastream($object_id, $datastream_id) {
+  module_load_include('inc', 'islandora', 'RestConnection');
+  global $user;
   if (!isset($datastream_id)) {
     drupal_set_message(t('Cannot remove datastream, datastream id not set'));
     return;
   }
-  $object = new Object($object_id);
+  try {
-  if (!isset($object)) {
+    $restConnection = new RestConnection($user);
+    $fedora_object = new FedoraObject($object_id, $restConnection->repository);
+  } catch (Exception $e) {
+    drupal_set_message(t('Error getting Islandora object %s %e', array('%s' => $object_id, '%e' => $e)), 'error');
+    return "";
+  }
+  if (!isset($fedora_object)) {
+    drupal_set_message(t('Could not remove object, object not found'));
+    return;
+  }
+  if (!isset($fedora_object)) {
     drupal_set_message(t('Could not remove object, object not found'));
     return;
   }
-  module_invoke_all('islandora_purge_datastream', $datastream); //notify modules of pending deletion so we can update rels etc
+  $arr = module_invoke_all('islandora_pre_purge_datastream', $fedora_object, $datastream_id); //notify modules of pending deletion so we can update rels etc
-  $object->deleteDatastream();
+  if (isset($arr['block']) && $arr['block']) {
+    drupal_set_message(t('Purging of the %d datastream was blocked', array('%d' => $datastream_id)), 'warning');
+    return;
+  }
+  if (isset($arr['delete']) && $arr['delete']) {
+    try {
+      $datastream = new FedoraDatastream($datastream_id, $fedora_object, $restConnection->repository);
+      $datastream->state = 'D';
+    } catch (Exception $e) {
+      drupal_set_message(t('Error deleting %s datastream from Islandora object %o %e', array('%s' => $datastream_id, '%o' => $object_id, '%e' => $e)), 'error');
+      return;
+    }
+  }
+  else {
+    try {
+      $fedora_object->purgeDatastream($datastream_id);
+    } catch (Exception $e) {
+      drupal_set_message(t('Error purging %s datastream from Islandora object %o %e', array('%s' => $datastream_id, '%o' => $object_id, '%e' => $e)), 'error');
+      return;
+    }
+  }
+  module_invoke_all('islandora_post_purge_datastream', $fedora_object, $datastream_id);  //notify modules post deletion
+  drupal_set_message(t('%d datastream sucessfully purged from Islandora object %o', array('%d' => $datastream_id, '%o' => $object_id)));
+  drupal_goto('islandora/object/' . $object_id);
 }
 
 /**
@@ -386,14 +432,14 @@ function islandora_view_object($object_id) {
 function islandora_islandora_view_object($object) {
   $supported_models = islandora_get_types();
   $output = "";
-  foreach ($object->models as $model) {
+    foreach ($object->models as $model) {
-    if (isset($supported_models[$model][ISLANDORA_VIEW_HOOK]) && $supported_models[$model][ISLANDORA_VIEW_HOOK] == TRUE) {//another module is handling the view
+      if (isset($supported_models[$model][ISLANDORA_VIEW_HOOK]) && $supported_models[$model][ISLANDORA_VIEW_HOOK] == TRUE) {//another module is handling the view
-      return;
+        return;
+      }
     }
-  }
   $output = theme('islandora_default', array('islandora_object' => $object));
   return array('Default Output' => $output);
-}
+  }
 
 /**
  * Theme registry function

islandora_basic_collection/islandora_basic_collection.module

@@ -137,3 +137,24 @@ function islandora_basic_collection_get_objects($object) {
   return $results;
 }
 
+function islandora_basic_collection_islandora_ingest_get_information($models, $object) {
+  if(in_array('islandora:collectionCModel', $models) && isset($object['COLLECTION_POLICY'])) {
+    try {
+      $return = array();
+      $xml = new SimpleXMLElement($object['COLLECTION_POLICY']);
+      $cms = $xml->getElementsByTagName('content_models')->item(0)->getElementsByTagName('content_model');
+      $return['contentsmodels'] = array();
+      foreach($cms as $cm) {
+        $contentmodel = array();
+        $contentmodel['name'] = (string) $cm['name'];
+        $contentmodel['namespace'] = (string) $cm['namespace'];
+        $contentmodel['pid'] = (string) $cm['pid'];
+        $return['contentsmodels'] = (string) $contentmodel;
+      }
+      $return['relationship'] = trim($xml->getElementsByTagName('relationship')->item(0)->nodeValue);
+
+      return $return;
+    }
+    catch (Exception $e) { }
+  }
+}

utils/MimeClass.inc

@@ -0,0 +1,359 @@
+<?php
+
+
+
+/**
+ * @file
+ * This class inspired by Chris Jean's work, here:
+ * http://chrisjean.com/2009/02/14/generating-mime-type-in-php-is-not-magic/
+ *
+ * It does some MIME trickery, inspired by the need to to deal with Openoffice
+ * and MS Office 2007 file formats -- which are often mis-interpreted by
+ * mime-magic, fileinfo, and the *nix `file` command.
+ *
+ * In Drupal 6, we also make use of file_get_mimetype. See:
+ * http://api.drupal.org/api/function/file_get_mimetype/6
+ * ... however this only provides a uni-directional lookup (ext->mime).
+ * While I don't have a specific use case for a mime->extension lookup, I think
+ * it's good to have in here.
+ *
+ * Drupal 7 will have better mime handlers.  See:
+ * http://api.drupal.org/api/function/file_default_mimetype_mapping/7
+ *
+ */
+
+class MimeClass {
+
+  protected $protectedMimeTypes = array(
+    /*
+     * This is a shortlist of mimetypes which should catch most
+     * mimetype<-->extension lookups in the context of Islandora collections.
+     *
+     * It has been cut from a much longer list.
+     *
+     * Two types of mimetypes should be put in this list:
+     *  1) Special emerging formats which may not yet be expressed in the system
+     *     mime.types file.
+     *  2) Heavily used mimetypes of particular importance to the Islandora
+     *     project, as lookups against this list will be quicker and less
+     *     resource intensive than other methods.
+     *
+     * Lookups are first checked against this short list.  If no results are
+     * found, then the lookup function may move on to check other sources,
+     * namely the system's mime.types file.
+     *
+     * In most cases though, this short list should suffice.
+     *
+     * If modifying this list, please note that for promiscuous mimetypes
+     * (those which map to multiple extensions, such as text/plain)
+     * The function get_extension will always return the *LAST* extension in
+     * this list, so you should put your preferred extension *LAST*.
+     *
+     * e.g...
+     * "jpeg"    => "image/jpeg",
+     * "jpe"     => "image/jpeg",
+     * "jpg"     => "image/jpeg",
+     *
+     * $this->get_extension('image/jpeg') will always return 'jpg'.
+     *
+     */
+    // Openoffice:
+    'odb' => 'application/vnd.oasis.opendocument.database',
+    'odc' => 'application/vnd.oasis.opendocument.chart',
+    'odf' => 'application/vnd.oasis.opendocument.formula',
+    'odg' => 'application/vnd.oasis.opendocument.graphics',
+    'odi' => 'application/vnd.oasis.opendocument.image',
+    'odm' => 'application/vnd.oasis.opendocument.text-master',
+    'odp' => 'application/vnd.oasis.opendocument.presentation',
+    'ods' => 'application/vnd.oasis.opendocument.spreadsheet',
+    'odt' => 'application/vnd.oasis.opendocument.text',
+    'otg' => 'application/vnd.oasis.opendocument.graphics-template',
+    'oth' => 'application/vnd.oasis.opendocument.text-web',
+    'otp' => 'application/vnd.oasis.opendocument.presentation-template',
+    'ots' => 'application/vnd.oasis.opendocument.spreadsheet-template',
+    'ott' => 'application/vnd.oasis.opendocument.text-template',
+    // Staroffice:
+    'stc' => 'application/vnd.sun.xml.calc.template',
+    'std' => 'application/vnd.sun.xml.draw.template',
+    'sti' => 'application/vnd.sun.xml.impress.template',
+    'stw' => 'application/vnd.sun.xml.writer.template',
+    'sxc' => 'application/vnd.sun.xml.calc',
+    'sxd' => 'application/vnd.sun.xml.draw',
+    'sxg' => 'application/vnd.sun.xml.writer.global',
+    'sxi' => 'application/vnd.sun.xml.impress',
+    'sxm' => 'application/vnd.sun.xml.math',
+    'sxw' => 'application/vnd.sun.xml.writer',
+    // K-office:
+    'kil' => 'application/x-killustrator',
+    'kpt' => 'application/x-kpresenter',
+    'kpr' => 'application/x-kpresenter',
+    'ksp' => 'application/x-kspread',
+    'kwt' => 'application/x-kword',
+    'kwd' => 'application/x-kword',
+    // Ms office 97:
+    'doc' => 'application/msword',
+    'xls' => 'application/vnd.ms-excel',
+    'ppt' => 'application/vnd.ms-powerpoint',
+    // Office2007:
+    'docx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
+    'docm' => 'application/vnd.ms-word.document.macroEnabled.12',
+    'dotx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.template',
+    'dotm' => 'application/vnd.ms-word.template.macroEnabled.12',
+    'xlsx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
+    'xlsm' => 'application/vnd.ms-excel.sheet.macroEnabled.12',
+    'xltx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.template',
+    'xltm' => 'application/vnd.ms-excel.template.macroEnabled.12',
+    'xlsb' => 'application/vnd.ms-excel.sheet.binary.macroEnabled.12',
+    'xlam' => 'application/vnd.ms-excel.addin.macroEnabled.12',
+    'pptx' => 'application/vnd.openxmlformats-officedocument.presentationml.presentation',
+    'pptm' => 'application/vnd.ms-powerpoint.presentation.macroEnabled.12',
+    'ppsx' => 'application/vnd.openxmlformats-officedocument.presentationml.slideshow',
+    'ppsm' => 'application/vnd.ms-powerpoint.slideshow.macroEnabled.12',
+    'potx' => 'application/vnd.openxmlformats-officedocument.presentationml.template',
+    'potm' => 'application/vnd.ms-powerpoint.template.macroEnabled.12',
+    'ppam' => 'application/vnd.ms-powerpoint.addin.macroEnabled.12',
+    'sldx' => 'application/vnd.openxmlformats-officedocument.presentationml.slide',
+    'sldm' => 'application/vnd.ms-powerpoint.slide.macroEnabled.12',
+    // Wordperfect (who cares?):
+    'wpd' => 'application/wordperfect',
+    // Common and generic containers:
+    'pdf' => 'application/pdf',
+    'eps' => 'application/postscript',
+    'ps' => 'application/postscript',
+    'rtf' => 'text/rtf',
+    'rtx' => 'text/richtext',
+    'latex' => 'application/x-latex',
+    'tex' => 'application/x-tex',
+    'texi' => 'application/x-texinfo',
+    'texinfo' => 'application/x-texinfo',
+    // *ml:
+    'css' => 'text/css',
+    'htm' => 'text/html',
+    'html' => 'text/html',
+    'wbxml' => 'application/vnd.wap.wbxml',
+    'xht' => 'application/xhtml+xml',
+    'xhtml' => 'application/xhtml+xml',
+    'xsl' => 'text/xml',
+    'xml' => 'text/xml',
+    'csv' => 'text/csv',
+    'tsv' => 'text/tab-separated-values',
+    'txt' => 'text/plain',
+    // images:
+    "bmp" => "image/bmp",
+    "gif" => "image/gif",
+    "ief" => "image/ief",
+    "jpeg" => "image/jpeg",
+    "jpe" => "image/jpeg",
+    "jpg" => "image/jpeg",
+    "jp2" => "image/jp2",
+    "png" => "image/png",
+    "tiff" => "image/tiff",
+    "tif" => "image/tif",
+    "djvu" => "image/vnd.djvu",
+    "djv" => "image/vnd.djvu",
+    "wbmp" => "image/vnd.wap.wbmp",
+    "ras" => "image/x-cmu-raster",
+    "pnm" => "image/x-portable-anymap",
+    "pbm" => "image/x-portable-bitmap",
+    "pgm" => "image/x-portable-graymap",
+    "ppm" => "image/x-portable-pixmap",
+    "rgb" => "image/x-rgb",
+    "xbm" => "image/x-xbitmap",
+    "xpm" => "image/x-xpixmap",
+    "xwd" => "image/x-windowdump",
+    // videos:
+    "mpeg" => "video/mpeg",
+    "mpe" => "video/mpeg",
+    "mpg" => "video/mpeg",
+    "m4v" => "video/mp4",
+    "mp4" => "video/mp4",
+    "ogv" => "video/ogg",
+    "qt" => "video/quicktime",
+    "mov" => "video/quicktime",
+    "mxu" => "video/vnd.mpegurl",
+    "avi" => "video/x-msvideo",
+    "movie" => "video/x-sgi-movie",
+    "flv" => "video/x-flv",
+    "swf" => "application/x-shockwave-flash",
+    // Audio:
+    "mp3" => "audio/mpeg",
+    "mp4a" => "audio/mp4",
+    "m4a" => "audio/mp4",
+    "oga" => "audio/ogg",
+    "ogg" => "audio/ogg",
+    "flac" => "audio/x-flac",
+    "wav" => "audio/vnd.wave",
+    // Compressed formats:
+    // (note: http://svn.cleancode.org/svn/email/trunk/mime.types)
+    "tgz" => "application/x-gzip",
+    "gz" => "application/x-gzip",
+    "tar" => "application/x-tar",
+    "gtar" => "application/x-gtar",
+    "zip" => "application/x-zip",
+    // others:
+    'bin' => 'application/octet-stream',
+  );
+  protected $protectedFileExtensions;
+  protected $systemTypes;
+  protected $systemExts;
+  protected $etcMimeTypes = '/etc/mime.types';
+
+  /**
+   * Construtor
+   */
+  public function __construct() {
+
+    // Populate the reverse shortlist:
+    $this->protectedFileExtensions = array_flip($this->protectedMimeTypes);
+
+    // Pick up a local mime.types file if it is available.
+    if (is_readable('mime.types')) {
+      $this->etcMimeTypes = 'mime.types';
+    }
+  }
+
+  /**
+   * description: returns a mimetype associated with the file extension of
+   * $filename
+   *
+   * @param string $filename
+   *   The filename
+   * @param boolean $debug
+   *   Returns a debug array.
+   *
+   * @return mixed
+   *   string or an array
+   */
+  public function getMimetype($filename, $debug = FALSE) {
+
+    $file_name_and_extension = explode('.', $filename);
+    $ext = strtolower(array_pop($file_name_and_extension));
+
+    if (!empty($this->protectedMimeTypes[$ext])) {
+      if (TRUE === $debug) {
+        return array('mime_type' => $this->protectedMimeTypes[$ext], 'method' => 'from_array');
+      }
+      return $this->protectedMimeTypes[$ext];
+    }
+
+    if (function_exists('file_get_mimetype')) {
+      $drupal_mimetype = file_get_mimetype($filename);
+      if ('application/octet-stream' != $drupal_mimetype) {
+        if (TRUE == $debug) {
+          return array('mime_type' => $drupal_mimetype, 'method' => 'file_get_mimetype');
+        }
+        return $drupal_mimetype;
+      }
+    }
+
+    if (!isset($this->systemTypes)) {
+      $this->systemTypes = $this->systemExtensionMimetypes();
+    }
+    if (isset($this->systemTypes[$ext])) {
+      if (TRUE == $debug) {
+        return array('mime_type' => $this->systemTypes[$ext], 'method' => 'mime.types');
+      }
+      return $this->systemTypes[$ext];
+    }
+
+    if (TRUE === $debug) {
+      return array('mime_type' => 'application/octet-stream', 'method' => 'last_resort');
+    }
+    return 'application/octet-stream';
+  }
+
+  /**
+   * function: get_extension
+   * description: returns *one* valid file extension for a given $mime_type
+   *
+   * @param type $mime_type
+   * @param type $debug
+   * @return type
+   */
+  public function getExtension($mime_type, $debug = FALSE) {
+
+    if (!empty($this->protectedFileExtensions[$mime_type])) {
+      if (TRUE == $debug) {
+        return array('extension' => $this->protectedFileExtensions[$mime_type], 'method' => 'from_array');
+      }
+      return $this->protectedFileExtensions[$mime_type];
+    }
+
+    if (!isset($this->systemExts)) {
+      $this->systemExts = $this->systemMimetypeExtensions();
+    }
+    if (isset($this->systemExts[$mime_type])) {
+      if (TRUE == $debug) {
+        return array('extension' => $this->systemExts[$mime_type], 'method' => 'mime.types');
+      }
+      return $this->systemExts[$mime_type];
+    }
+
+    if (TRUE == $debug) {
+      return array('extension' => 'bin', 'method' => 'last_resort');
+    }
+    return 'bin';
+  }
+
+  /**
+   * function: systemMimetypeExtensions
+   * description: populates an internal array of mimetype/extension associations
+   * from the system mime.types file, or a local mime.types if one is found (see
+   * __constuctor).
+   * return: array of mimetype => extension
+   */
+  protected function systemMimetypeExtensions() {
+    $out = array();
+    if (file_exists($this->etcMimeTypes)) {
+      $file = fopen($this->etcMimeTypes, 'r');
+      while (($line = fgets($file)) !== FALSE) {
+        $line = trim(preg_replace('/#.*/', '', $line));
+        if (!$line) {
+          continue;
+        }
+        $parts = preg_split('/\s+/', $line);
+        if (count($parts) == 1) {
+          continue;
+        }
+        // A single part means a mimetype without extensions, which we ignore.
+        $type = array_shift($parts);
+        if (!isset($out[$type])) {
+          $out[$type] = array_shift($parts);
+        }
+        // We take the first ext from the line if many are present.
+      }
+      fclose($file);
+    }
+    return $out;
+  }
+
+  /**
+   * function: systemMimetypeExtensions
+   * description: populates an internal array of mimetype/extension associations
+   * from the system mime.types file, or a local mime.types if one is found (see
+   * __constuctor).
+   * return: array of extension => mimetype
+   */
+  protected function systemExtensionMimetypes() {
+    $out = array();
+    if (file_exists($this->etcMimeTypes)) {
+      $file = fopen($this->etcMimeTypes, 'r');
+      while (($line = fgets($file)) !== FALSE) {
+        $line = trim(preg_replace('/#.*/', '', $line));
+        if (!$line)
+          continue;
+        $parts = preg_split('/\s+/', $line);
+        if (count($parts) == 1)
+          continue;
+        // A single part means a mimetype without extensions, which we ignore.
+        $type = array_shift($parts);
+        foreach ($parts as $part)
+          $out[$part] = $type;
+      }
+      fclose($file);
+    }
+    return $out;
+  }
+
+}
+