category random replaced by a more generic category : list. You give a list

of element identifiers and it creates a page virtual temporary
category. random.php generates a randomized list of element id visible to
the user (according to permissions) and redirects to category.php.

Major problem : elements order is in id ascending order, I don't know how to
change order when having id1,id2,id3 and id2,id3,id1 (the display order is
the same)


git-svn-id: http://piwigo.org/svn/trunk@605 68402e56-0260-453c-a942-63ccdbb3a9ee

category.php

@@ -197,7 +197,7 @@ $template->assign_block_vars(
 $template->assign_block_vars(
   'special_cat',
   array(
-    'URL' => add_session_id(PHPWG_ROOT_PATH.'category.php?cat=random'),
+    'URL' => add_session_id(PHPWG_ROOT_PATH.'random.php'),
     'TITLE' => $lang['random_cat_hint'],
     'NAME' => $lang['random_cat']
     ));
@@ -274,7 +274,7 @@ if (isset($page['cat'])
                            ,'most_visited'
                            ,'recent_pics'
                            ,'best_rated'
-                           ,'random'
+                           ,'list'
                        ))))
 {
   include(PHPWG_ROOT_PATH.'include/category_default.inc.php');

include/category_default.inc.php

@@ -105,6 +105,10 @@ while ($row = mysql_fetch_array($result))
   {
     $url_link.= '&search='.$_GET['search'];
   }
+  else if ($page['cat'] == 'list')
+  {
+    $url_link.= '&list='.$_GET['list'];
+  }
     
   $template->assign_block_vars(
     'thumbnails.line.thumbnail',

include/functions_category.inc.php

@@ -66,7 +66,7 @@ function check_restrictions( $category_id )
  *  - equals 'recent_pics'
  *  - equals 'recent_cats'
  *  - equals 'calendar'
- *  - equals 'random'
+ *  - equals 'list'
  *
  * The function fills the global var $page['cat'] and returns nothing
  *
@@ -99,8 +99,7 @@ function check_cat_id( $cat )
          or $cat == 'best_rated'
          or $cat == 'recent_pics'
          or $cat == 'recent_cats'
-         or $cat == 'calendar'
-         or $cat == 'random' )
+         or $cat == 'calendar' )
     {
       $page['cat'] = $cat;
     }
@@ -108,6 +107,12 @@ function check_cat_id( $cat )
     {
       $page['cat'] = $cat;
     }
+    if ($cat == 'list'
+        and isset($_GET['list'])
+        and preg_match('/^\d+(,\d+)*$/', $_GET['list']))
+    {
+      $page['cat'] = 'list';
+    }
   }
 }
 
@@ -434,7 +439,7 @@ SELECT galleries_url
 //       - most visited pictures
 //       - best rated pictures
 //       - recent pictures
-//       - random pictures
+//       - defined list (used for random)
 // 3. determination of the title of the page
 // 4. creation of the navigation bar
 function initialize_category( $calling_page = 'category' )
@@ -467,12 +472,13 @@ function initialize_category( $calling_page = 'category' )
     }
     else
     {
-      if ( $page['cat'] == 'search'
-           or $page['cat'] == 'most_visited'
-           or $page['cat'] == 'recent_pics'
-           or $page['cat'] == 'recent_cats'
-           or $page['cat'] == 'best_rated'
-           or $page['cat'] == 'calendar' )
+      if ($page['cat'] == 'search'
+          or $page['cat'] == 'most_visited'
+          or $page['cat'] == 'recent_pics'
+          or $page['cat'] == 'recent_cats'
+          or $page['cat'] == 'best_rated'
+          or $page['cat'] == 'calendar'
+          or $page['cat'] == 'list')
       {
         // we must not show pictures of a forbidden category
         if ( $user['forbidden_categories'] != '' )
@@ -788,23 +794,17 @@ SELECT COUNT(1) AS count
           $page['nb_image_page'] = $conf['top_number'] - $page['start'];
         }
       }
-      else if ($page['cat'] == 'random')
+      else if ($page['cat'] == 'list')
       {
         $page['title'] = $lang['random_cat'];
           
+        $page['where'] = 'WHERE 1=1';
         if (isset($forbidden))
         {
-          $page['where'] = 'WHERE '.$forbidden;
+          $page['where'].= ' AND '.$forbidden;
         }
-        else
-        {
-          $page['where'] = 'WHERE 1=1';
-        }
-
-        $conf['order_by'] = ' ORDER BY RAND()';
-
-        $page['cat_nb_images'] = $conf['top_number'];
-        $page['nb_image_page'] = $page['cat_nb_images'];
+        $page['where'].= ' AND image_id IN ('.$_GET['list'].')';
+        $page['cat_nb_images'] = count(explode(',', $_GET['list']));
       }
 
       if (isset($query))

picture.php

@@ -209,6 +209,10 @@ if ( $page['cat'] == 'search' )
 {
   $url_up.= "&search=".$_GET['search'];
 }
+if ( $page['cat'] == 'list' )
+{
+  $url_up.= "&list=".$_GET['list'];
+}
 
 $url_admin = PHPWG_ROOT_PATH.'admin.php?page=picture_modify';
 $url_admin.= '&cat_id='.$page['cat'];

random.php

@@ -0,0 +1,63 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | PhpWebGallery - a PHP based picture gallery                           |
+// | Copyright (C) 2002-2003 Pierrick LE GALL - pierrick@phpwebgallery.net |
+// | Copyright (C) 2003-2004 PhpWebGallery Team - http://phpwebgallery.net |
+// +-----------------------------------------------------------------------+
+// | branch        : BSF (Best So Far)
+// | file          : $RCSfile$
+// | last update   : $Date$
+// | last modifier : $Author$
+// | revision      : $Revision$
+// +-----------------------------------------------------------------------+
+// | This program is free software; you can redistribute it and/or modify  |
+// | it under the terms of the GNU General Public License as published by  |
+// | the Free Software Foundation                                          |
+// |                                                                       |
+// | This program is distributed in the hope that it will be useful, but   |
+// | WITHOUT ANY WARRANTY; without even the implied warranty of            |
+// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      |
+// | General Public License for more details.                              |
+// |                                                                       |
+// | You should have received a copy of the GNU General Public License     |
+// | along with this program; if not, write to the Free Software           |
+// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
+// | USA.                                                                  |
+// +-----------------------------------------------------------------------+
+
+// +-----------------------------------------------------------------------+
+// |                          define and include                           |
+// +-----------------------------------------------------------------------+
+define('PHPWG_ROOT_PATH','./');
+include_once( PHPWG_ROOT_PATH.'include/common.inc.php' );
+// +-----------------------------------------------------------------------+
+// |                     generate random element list                      |
+// +-----------------------------------------------------------------------+
+
+// we must not show pictures of a forbidden category
+$where = '';
+if ( $user['forbidden_categories'] != '' )
+{
+  $where = 'WHERE category_id NOT IN ('.$user['forbidden_categories'].')';
+}
+
+$query = '
+SELECT DISTINCT(id)
+  FROM '.IMAGES_TABLE.'
+    INNER JOIN '.IMAGE_CATEGORY_TABLE.' AS ic ON id = ic.image_id
+  '.$where.'
+  ORDER BY RAND(NOW())
+  LIMIT 0, '.$conf['top_number'].'
+;';
+$result = pwg_query($query);
+$ids = array();
+while ($row = mysql_fetch_array($result))
+{
+  array_push($ids, $row['id']);
+}
+// +-----------------------------------------------------------------------+
+// |                                redirect                               |
+// +-----------------------------------------------------------------------+
+$url = PHPWG_ROOT_PATH.'category.php?cat=list&amp;list='.implode(',', $ids);
+redirect(add_session_id($url));
+?>