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Diffstat (limited to 'BSF/admin/include/functions_permalinks.php')
| -rw-r--r-- | BSF/admin/include/functions_permalinks.php | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/BSF/admin/include/functions_permalinks.php b/BSF/admin/include/functions_permalinks.php new file mode 100644 index 000000000..4b19f02e1 --- /dev/null +++ b/BSF/admin/include/functions_permalinks.php @@ -0,0 +1,204 @@ +<?php +// +-----------------------------------------------------------------------+ +// | Piwigo - a PHP based picture gallery | +// +-----------------------------------------------------------------------+ +// | Copyright(C) 2008 Piwigo Team http://piwigo.org | +// | Copyright(C) 2003-2008 PhpWebGallery Team http://phpwebgallery.net | +// | Copyright(C) 2002-2003 Pierrick LE GALL http://le-gall.net/pierrick | +// +-----------------------------------------------------------------------+ +// | 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. | +// +-----------------------------------------------------------------------+ + +/** returns a category id that corresponds to the given permalink (or null) + * @param string permalink + */ +function get_cat_id_from_permalink( $permalink ) +{ + $query =' +SELECT id FROM '.CATEGORIES_TABLE.' + WHERE permalink="'.$permalink.'"'; + $ids = array_from_query($query, 'id'); + if (!empty($ids)) + { + return $ids[0]; + } + return null; +} + +/** returns a category id that has used before this permalink (or null) + * @param string permalink + * @param boolean is_hit if true update the usage counters on the old permalinks + */ +function get_cat_id_from_old_permalink($permalink) +{ + $query=' +SELECT c.id + FROM '.OLD_PERMALINKS_TABLE.' op INNER JOIN '.CATEGORIES_TABLE.' c + ON op.cat_id=c.id + WHERE op.permalink="'.$permalink.'" + LIMIT 1'; + $result = pwg_query($query); + $cat_id = null; + if ( mysql_num_rows($result) ) + list( $cat_id ) = mysql_fetch_array($result); + return $cat_id; +} + + +/** 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); + 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); + $sanitized_permalink = trim($sanitized_permalink, '/'); + $sanitized_permalink = str_replace('//', '/', $sanitized_permalink); + if ( $sanitized_permalink != $permalink + or preg_match( '#^(\d)+(-.*)?$#', $permalink) ) + { + $page['errors'][] = l10n('Permalink_name_rule'); + return false; + } + + // check if the new permalink is actively used + $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; + } + } + + // check if the new permalink was historically used + $old_cat_id = get_cat_id_from_old_permalink($permalink); + if ( isset($old_cat_id) and $old_cat_id!=$cat_id ) + { + $page['errors'][] = + sprintf( + l10n('Permalink_%s_histo_used_by_%s'), + $permalink, $old_cat_id + ); + return false; + } + + if ( !delete_cat_permalink($cat_id, $save ) ) + { + return false; + } + + if ( isset($old_cat_id) ) + {// the new permalink must not be active and old at the same time + assert( $old_cat_id==$cat_id ); + $query = ' +DELETE FROM '.OLD_PERMALINKS_TABLE.' + WHERE cat_id='.$old_cat_id.' AND permalink="'.$permalink.'"'; + pwg_query($query); + } + + $query = ' +UPDATE '.CATEGORIES_TABLE.' + SET permalink="'.$permalink.'" + WHERE id='.$cat_id.' + LIMIT 1'; + pwg_query($query); + + unset( $cache['cat_names'] ); //force regeneration + + return true; +} + +?> |