Generate the download form.

...  As opposed to spitting out markup for it directly.

ObjectHelper.inc

@@ -359,7 +359,7 @@ class ObjectHelper {
     $content = '';
     $id = $dataStreamValue->ID;
     $label = $dataStreamValue->label;
-    $label = str_replace("_", " ", $label);
+    //$label = str_replace("_", " ", $label);
     $label_deslashed = preg_replace('/\//i', '${1}_', $label); // Necessary to handle the case of Datastream labels that contain slashes. Ugh.
     $mimeType = $dataStreamValue->MIMEType;
 
@@ -368,20 +368,8 @@ class ObjectHelper {
         'target' => '_blank',
       ),
     ));
-    $action = url("fedora/repository/object_download/$pid/$id/$label_deslashed");
+    
-    $downloadVersion = '<form method="GET" action="' . $action . '"><input type="submit" value="' . t('Download') . '"></form>';
+    $downloadVersion = drupal_get_form('fedora_repository_download_datastream_form', $pid, $id, $label_deslashed);
-    if (user_access(ObjectHelper::$EDIT_FEDORA_METADATA)) {
-      $versions = $item->get_datastream_history($id);
-      if (is_array($versions)) {
-        $downloadVersion = '<form method="GET" action="' . $action . '" onsubmit="this.action=\'' . $action . '\' + \'/\'+this.version.value;">';
-        $downloadVersion .= '<input type="submit" value="' . t('Download') . '">';
-        $downloadVersion .= '<select name="version">';
-        foreach ($versions as $version) {
-          $downloadVersion .= '<option>' . $version->createDate . '</option>';
-        }
-        $downloadVersion .= '</select></form>';
-      }
-    }
 
     return array(
       array(

fedora_repository.module

@@ -623,6 +623,42 @@ function fedora_repository_purge_stream_form_submit($form, &$form_state) {
   $form_state['redirect'] = $base_url . "/fedora/repository/$pid";
 }
 
+function fedora_repository_download_datastream_form(&$form_state, $pid, $dsid, $label) {
+  $form = array(
+    '#action' => url("fedora/repository/object_download/$pid/$dsid/$label"),
+    'submit' => array(
+      '#type' => 'submit',
+      '#value' => t('Download'),
+    ),
+  );
+  
+  if (user_access(ObjectHelper::$EDIT_FEDORA_METADATA)) {
+    $item = new Fedora_Item($pid);
+    $versions = $item->get_datastream_history($dsid);
+    $version_array = array();
+    if (is_array($versions)) {
+      foreach ($versions as $version) {
+        $version_array[] = $version->createDate;
+      }
+    }
+    else {
+      $version_array[] = $versions->createDate;
+    }
+    
+    if (count($version_array) > 1) {
+      $form['#attributes'] = array(
+        'onsubmit' => 'this.action="' . $form['#action'] . '/" + this.version.value;'
+      );
+      $form['version'] = array(
+        '#type' => 'select',
+        '#options' => array_combine($version_array, $version_array),
+      );
+    }
+  }
+  
+  return $form;
+}
+
 /**
  * fedora repository replace stream
  * @param type $pid