From b67a1d0b23b1404b585c5fd20d4dbc044a7e37ba Mon Sep 17 00:00:00 2001
From: Marco Villegas <git@marvil07.net>
Date: Fri, 12 Apr 2013 17:55:33 -0500
Subject: [PATCH] Issue #1791970 by drumm, marvil07: Add an option to detect
 tar.gz as extension instead of gz on views file extension
 field handler.

---
 .../Drupal/file/Plugin/views/field/Extension.php   |   42 ++++++++++++++++++--
 1 file changed, 39 insertions(+), 3 deletions(-)

diff --git a/core/modules/file/lib/Drupal/file/Plugin/views/field/Extension.php b/core/modules/file/lib/Drupal/file/Plugin/views/field/Extension.php
index 376793f..9822cce 100644
--- a/core/modules/file/lib/Drupal/file/Plugin/views/field/Extension.php
+++ b/core/modules/file/lib/Drupal/file/Plugin/views/field/Extension.php
@@ -19,10 +19,46 @@
  */
 class Extension extends FieldPluginBase {
 
+  protected function defineOptions() {
+    $options = parent::defineOptions();
+    $options['fileextension_detect_tar'] = array('default' => FALSE, 'bool' => TRUE);
+    return $options;
+  }
+
+  /**
+   * Default options form that provides the label widget that all fields
+   * should have.
+   */
+  public function buildOptionsForm(&$form, &$form_state) {
+    parent::buildOptionsForm($form, $form_state);
+    $form['fileextension_detect_tar'] = array(
+      '#type' => 'checkbox',
+      '#title' => t('Detect if tar is part of the extension'),
+      '#description' => t('Detect multiple tar extensions like tar.gz'),
+      '#default_value' => $this->options['fileextension_max_extension_parts'],
+    );
+  }
+
   function render($values) {
-    $value = $this->get_value($values);
-    if (preg_match('/\.([^\.]+)$/', $value, $match)) {
-      return $this->sanitizeValue($match[1]);
+    if (!$this->options['fileextension_detect_tar']) {
+      $value = $this->get_value($values);
+      if (preg_match('/\.([^\.]+)$/', $value, $match)) {
+        return $this->sanitizeValue($match[1]);
+      }
+    }
+    else {
+      $file_parts = explode('.', basename($this->get_value($values)));
+      // If there is an extension.
+      if (count($file_parts) > 1) {
+        $extension = array_pop($file_parts);
+        // See if the previous extension is '.tar' and if so, add that, so we
+        // see 'tar.gz' or 'tar.bz2' instead of just 'gz'.
+        $last_part_in_name = array_pop($file_parts);
+        if ($last_part_in_name === 'tar') {
+          $extension = $last_part_in_name . '.' . $extension;
+        }
+        return $this->sanitizeValue($extension);
+      }
     }
   }
 
-- 
1.7.10.4