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Diffstat (limited to '')
| -rw-r--r-- | admin/include/functions_permalinks.php | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/admin/include/functions_permalinks.php b/admin/include/functions_permalinks.php new file mode 100644 index 000000000..9a36ccf3d --- /dev/null +++ b/admin/include/functions_permalinks.php @@ -0,0 +1,170 @@ +<?php +// +-----------------------------------------------------------------------+ +// | PhpWebGallery - a PHP based picture gallery | +// | Copyright (C) 2003-2007 PhpWebGallery Team - http://phpwebgallery.net | +// +-----------------------------------------------------------------------+ +// | file : $Id: admin/function_permalinks.inc.php$ +// | 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. | +// +-----------------------------------------------------------------------+ + +/** deletes the permalink associated with a category + * returns true on success + * @param int cat_id the target category id + * @param boolean save if true, the current category-permalink association + * is saved in the old permalinks table in case external links hit it + */ +function delete_cat_permalink( $cat_id, $save ) +{ + global $page, $cache; + $query = ' +SELECT permalink + FROM '.CATEGORIES_TABLE.' + WHERE id="'.$cat_id.'" +;'; + $result = pwg_query($query); + if ( mysql_num_rows($result) ) + { + list($permalink) = mysql_fetch_array($result); + } + if ( !isset($permalink) ) + {// no permalink; nothing to do + return true; + } + if ($save) + { + $old_cat_id = get_cat_id_from_old_permalink($permalink, false); + if ( isset($old_cat_id) and $old_cat_id!=$cat_id ) + { + $page['errors'][] = + sprintf( + l10n('Permalink_%s_histo_used_by_%s'), + $permalink, $old_cat_id + ); + return false; + } + } + $query = ' +UPDATE '.CATEGORIES_TABLE.' + SET permalink=NULL + WHERE id='.$cat_id.' + LIMIT 1'; + pwg_query($query); + + unset( $cache['cat_names'] ); //force regeneration + if ($save) + { + if ( isset($old_cat_id) ) + { + $query = ' +UPDATE '.OLD_PERMALINKS_TABLE.' + SET date_deleted=NOW() + WHERE cat_id='.$cat_id.' AND permalink="'.$permalink.'"'; + } + else + { + $query = ' +INSERT INTO '.OLD_PERMALINKS_TABLE.' + (permalink, cat_id, date_deleted) +VALUES + ( "'.$permalink.'",'.$cat_id.',NOW() )'; + } + pwg_query( $query ); + } + return true; +} + +/** sets a new permalink for a category + * returns true on success + * @param int cat_id the target category id + * @param string permalink the new permalink + * @param boolean save if true, the current category-permalink association + * is saved in the old permalinks table in case external links hit it + */ +function set_cat_permalink( $cat_id, $permalink, $save ) +{ + global $page, $cache; + + $sanitized_permalink = preg_replace( '#[^a-zA-Z0-9_-]#', '' ,$permalink); + if ( $sanitized_permalink != $permalink + or preg_match( '#^(\d)+-?#', $permalink) ) + { + $page['errors'][] = l10n('Permalink_name_rule'); + return false; + } + + $existing_cat_id = get_cat_id_from_permalink( $permalink ); + if ( isset($existing_cat_id) ) + { + if ( $existing_cat_id==$cat_id ) + {// no change required + return true; + } + else + { + $page['errors'][] = + sprintf( + l10n('Permalink %s is already used by category %s'), + $permalink, $existing_cat_id + ); + return false; + } + } + + if ($save) + { + $old_cat_id = get_cat_id_from_old_permalink($permalink, false); + if ( isset($old_cat_id) ) + { + if ( $old_cat_id!=$cat_id ) + { + $page['errors'][] = + sprintf( + l10n('Permalink_%s_histo_used_by_%s'), + $permalink, $old_cat_id + ); + return false; + } + else + { + $query = ' +DELETE FROM '.OLD_PERMALINKS_TABLE.' + WHERE cat_id='.$cat_id.' AND permalink="'.$permalink.'"'; + pwg_query($query); + } + } + } + + if ( !delete_cat_permalink($cat_id, $save ) ) + { + return false; + } + + $query = ' +UPDATE '.CATEGORIES_TABLE.' + SET permalink="'.$permalink.'" + WHERE id='.$cat_id.' + LIMIT 1'; + pwg_query($query); + + unset( $cache['cat_names'] ); //force regeneration + + return true; +} + +?> |