From a662414888bace91b57708447c2ecc09dbfa7de2 Mon Sep 17 00:00:00 2001
From: Manuel Garcia <manuel.drupal@gmail.com>
Date: Wed, 2 Mar 2011 21:32:06 +0100
Subject: [PATCH] By Manuel Garcia: Added file which provides a Drush command to revert views overridden in the system.

---
 views_revert.drush.inc |  147 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 147 insertions(+), 0 deletions(-)
 create mode 100644 views_revert.drush.inc

diff --git a/views_revert.drush.inc b/views_revert.drush.inc
new file mode 100644
index 0000000..618017a
--- /dev/null
+++ b/views_revert.drush.inc
@@ -0,0 +1,147 @@
+<?php
+/**
+ * @file
+ * views-revert - Drush command to revert views overridden in the system.
+ */
+
+/*
+ * Implement hook_drush_help().
+ */
+function views_revert_drush_help($section) {
+  switch ($section) {
+    case 'drush:revert-views':
+      return dt('Reverts all views in the drupal installation that have been overriden. Careful, use with care.');
+  }
+}
+
+/*
+ * Implement hook_drush_command().
+ */
+function views_revert_drush_command() {
+  $items = array();
+
+  $items['views-revert'] = array(
+    'callback' => 'views_revert_views',
+    'drupal dependencies' => array('views', ),
+    'description' => dt('Revert overridden views to their default state. Make sure to backup first.'),
+    'bootstrap' => DRUSH_BOOTSTRAP_DRUPAL_FULL,
+    'aliases' => array('vr'),
+  );
+
+  return $items;
+}
+
+/*
+ * Callback function for views-revert command
+ */
+function views_revert_views() {
+  $views = views_get_all_views();
+  $i = 0;
+  $viewnames = _convert_csv_to_array(func_get_args()); // the provided view names specified in the command
+
+  // find all overridden views
+  foreach ($views as $view) {
+    if ($view->disabled) continue;
+    if ($view->type == dt('Overridden')) {
+      $overridden[$view->name] = $view->name;
+    }
+  }
+
+  // return early if there are no views overridden in the system
+  if(empty($overridden)) {
+    return drush_set_error(dt('There are no overridden views in the system.'));
+  }
+
+  // If the user specified in the command the views to be overridden
+  if(!empty($viewnames)) {
+    foreach($viewnames as $key => $viewname) {
+      $is_overridden = key_exists($viewname, $overridden);
+      // Check if the provided view name is in the system
+      if ($viewname && !key_exists($viewname, $views)) {
+        drush_set_error(dt("'!viewname' view is not present in the system.", array('!viewname' => $viewname)));
+      }
+      // Check if the provided view is overridden
+      else if (!$is_overridden) {
+        drush_set_error(dt("The view specified '!viewname' is not overridden.", array('!viewname' => $viewname)));
+      }
+      // If the view is overriden, revert it
+      else if($is_overridden){
+        views_revert_view($views[$viewname]);
+        $i++;
+      }
+      // We should never get here but well...
+      else {
+        drush_set_error(dt("The view specified '!viewname' is not provided in code, and thus cannot be reverted.", array('!viewname' => $viewname)));
+      }
+    }
+  }
+
+  // The user did not specify any views in the command, prompt the user
+  else {
+    // list of choices for the user
+    $overridden[dt('Revert all overridden views')] = dt('Revert all overridden views'); // add a choice at the end
+    $choice = drush_choice($overridden, 'Enter a number to choose which view to revert.', '!key'); // prompt the user
+
+    if ($choice !== FALSE) {
+      // revert all views option
+      if($choice == dt('Revert all overridden views')) {
+        $i = views_revert_allviews($views);
+      }
+      // else the user specified a single view
+      else {
+        views_revert_view($views[$choice]);
+        $i++;
+      }
+    }
+
+  }
+
+  // final results output
+  if($i == 0) {
+    drush_log(dt('No views were reverted.'), 'ok');
+  }
+  else {
+    drush_log(dt('Reverted a total of !count views.', array('!count' => $i)), 'ok');
+  }
+}
+
+/*
+ * Reverts all views
+ * @param $views all views in the system as provided by views_get_all_views().
+ */
+function views_revert_allviews($views) {
+  $i = 0;
+  foreach ($views as $view) {
+    if ($view->disabled) continue;
+
+    if ($view->type == t('Overridden')) {
+      views_revert_view($view);
+      $i++;
+    }
+  }
+  return $i;
+}
+
+/*
+ * Revert a specified view
+ * @param $view the view object to be reverted
+ *
+ * Checks on wether or not the view is overridden is handled in views_revert_views_revert()
+ * We perform a check here anyway in case someone somehow calls this function on their own...
+ */
+function views_revert_view($view) {
+  // check anyway just in case
+  if ($view->type == t('Overridden')) {
+    //revert the view
+    $view->delete();
+    // clear its cache
+    views_object_cache_clear('view', $view->name);
+    // give feedback
+    $message = 'Reverted the view "'. $view->name .'"';
+    drush_log($message, 'success');
+    // reverted one more view
+  }
+  else{
+    drush_set_error(dt("The view '!viewname' is not overridden.", array('!viewname' => $view->name)));
+  }
+}
-- 
1.7.1