feature 884 added: ability to delete photos uploaded via web API method

pwg.images.add, ie without storage_category_id. pLoader uses this method and
photos cannot be removed in any other way.


git-svn-id: http://piwigo.org/svn/trunk@2678 68402e56-0260-453c-a942-63ccdbb3a9ee

3 files changed, 165 insertions, 1 deletions

diff --git a/admin/element_set_global.php b/admin/element_set_global.php
index 3a3e79546..43b447012 100644
--- a/admin/element_set_global.php
+++ b/admin/element_set_global.php
@@ -40,6 +40,91 @@ include_once(PHPWG_ROOT_PATH.'admin/include/functions.php');
 check_status(ACCESS_ADMINISTRATOR);
 
 // +-----------------------------------------------------------------------+
+// |                         deletion form submission                      |
+// +-----------------------------------------------------------------------+
+
+if (isset($_POST['delete']))
+{
+  if (isset($_POST['confirm_deletion']) and 1 == $_POST['confirm_deletion'])
+  {
+    $collection = array();
+
+    switch ($_POST['target_deletion'])
+    {
+      case 'all' :
+      {
+        $collection = $page['cat_elements_id'];
+        break;
+      }
+      case 'selection' :
+      {
+        if (!isset($_POST['selection']) or count($_POST['selection']) == 0)
+        {
+          array_push($page['errors'], l10n('Select at least one picture'));
+        }
+        else
+        {
+          $collection = $_POST['selection'];
+        }
+        break;
+      }
+    }
+
+    // filter selection on photos that have no storage_category_id (ie that
+    // were added via pLoader)
+    if (count($collection) > 0)
+    {
+      $query = '
+SELECT
+    id
+  FROM '.IMAGES_TABLE.'
+  WHERE id IN ('.implode(',', $collection).')
+    AND storage_category_id IS NULL
+;';
+      $deletables = array_from_query($query, 'id');
+
+      if (count($deletables) > 0)
+      {
+        // what will be the categories to update? (to avoid orphan on
+        // representative_picture_id)
+        $query = '
+SELECT
+    category_id
+  FROM '.IMAGE_CATEGORY_TABLE.'
+  WHERE image_id IN ('.implode(',', $deletables).')
+;';
+        $categories_to_update = array_from_query($query, 'category_id');
+          
+        $physical_deletion = true;
+        delete_elements($deletables, $physical_deletion);
+
+        update_category($categories_to_update);
+
+        array_push(
+          $page['infos'],
+          sprintf(
+            l10n_dec(
+              '%d photo was deleted',
+              '%d photos were deleted',
+              count($deletables)
+              ),
+            count($deletables)
+            )
+          );
+      }
+      else
+      {
+        array_push($page['errors'], l10n('No photo can be deleted'));
+      }
+    }
+  }
+  else
+  {
+    array_push($page['errors'], l10n('You need to confirm deletion'));
+  }
+}
+
+// +-----------------------------------------------------------------------+
 // |                       global mode form submission                     |
 // +-----------------------------------------------------------------------+
 
@@ -237,6 +322,30 @@ $template->assign(
 $template->assign('IN_CADDIE', 'caddie' == $_GET['cat'] ? true : false );
 
 // +-----------------------------------------------------------------------+
+// |                            deletion form                              |
+// +-----------------------------------------------------------------------+
+
+// we can only remove photos that have no storage_category_id, in other
+// word, it currently (Butterfly) means that the photo was added with
+// pLoader
+if (count($page['cat_elements_id']) > 0)
+{
+  $query = '
+SELECT
+    COUNT(*)
+  FROM '.IMAGES_TABLE.'
+  WHERE id IN ('.implode(',', $page['cat_elements_id']).')
+    AND storage_category_id IS NULL
+;';
+  list($counter) = mysql_fetch_row(pwg_query($query));
+
+  if ($counter > 0)
+  {
+    $template->assign('show_delete_form', true);
+  }
+}
+
+// +-----------------------------------------------------------------------+
 // |                           global mode form                            |
 // +-----------------------------------------------------------------------+
 
diff --git a/admin/include/functions.php b/admin/include/functions.php
index 932578963..4b0713226 100644
--- a/admin/include/functions.php
+++ b/admin/include/functions.php
@@ -127,7 +127,7 @@ DELETE FROM '.OLD_PERMALINKS_TABLE.'
 //    - all the comments related to elements
 //    - all the links between categories and elements
 //    - all the favorites associated to elements
-function delete_elements($ids)
+function delete_elements($ids, $physical_deletion=false)
 {
   if (count($ids) == 0)
   {
@@ -135,6 +135,45 @@ function delete_elements($ids)
   }
   trigger_action('begin_delete_elements', $ids);
 
+  if ($physical_deletion)
+  {
+    include_once(PHPWG_ROOT_PATH.'include/functions_picture.inc.php');
+    
+    // we can currently delete physically only photo with no
+    // storage_category_id (added via pLoader)
+    //
+    // we assume that the element is a photo, with no representative
+    $query = '
+SELECT
+    id,
+    path,
+    tn_ext,
+    has_high
+  FROM '.IMAGES_TABLE.'
+  WHERE id IN ('.implode(',', $ids).')
+    AND storage_category_id IS NULL
+;';
+    $result = pwg_query($query);
+    while ($row = mysql_fetch_assoc($result))
+    {
+      $file_path = $row['path'];
+      $thumbnail_path = get_thumbnail_path($row);
+      $high_path = null;
+      if (isset($row['has_high']) and get_boolean($row['has_high']))
+      {
+        $high_path = get_high_path($row);
+      }
+
+      foreach (array($file_path, $thumbnail_path, $high_path) as $path)
+      {
+        if (isset($path) and !unlink($path))
+        {
+          die('"'.$path.'" cannot be removed');
+        }
+      }
+    }
+  }
+
   // destruction of the comments on the image
   $query = '
 DELETE FROM '.COMMENTS_TABLE.'
diff --git a/admin/template/goto/element_set_global.tpl b/admin/template/goto/element_set_global.tpl
index 649948854..7e3e64643 100644
--- a/admin/template/goto/element_set_global.tpl
+++ b/admin/template/goto/element_set_global.tpl
@@ -65,6 +65,22 @@
 
   </fieldset>
 
+  {if $show_delete_form}
+  <fieldset>
+    <legend>{'Deletions'|@translate}</legend>
+    <p style="font-style:italic">{'Note: Only deletes photos added with pLoader'|@translate}</p>
+    <p>
+      {'target'|@translate}
+      <label><input type="radio" name="target_deletion" value="all" /> {'all'|@translate}</label>
+      <label><input type="radio" name="target_deletion" value="selection" checked="checked" /> {'selection'|@translate}</label>
+    </p>
+    <p>
+    <label><input type="checkbox" name="confirm_deletion" value="1" /> {'confirm'|@translate}</label>
+    <input class="submit" type="submit" value="{'Delete selected photos'|@translate}" name="delete" {$TAG_INPUT_ENABLED}/>
+    </p>
+  </fieldset>
+  {/if}
+
   <fieldset>
 
     <legend>{'Form'|@translate}</legend>