204 lines
6 KiB
PHP
204 lines
6 KiB
PHP
<?php
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// +-----------------------------------------------------------------------+
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// | Piwigo - a PHP based picture gallery |
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// +-----------------------------------------------------------------------+
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// | Copyright(C) 2008-2009 Piwigo Team http://piwigo.org |
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// | Copyright(C) 2003-2008 PhpWebGallery Team http://phpwebgallery.net |
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// | Copyright(C) 2002-2003 Pierrick LE GALL http://le-gall.net/pierrick |
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// +-----------------------------------------------------------------------+
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// | This program is free software; you can redistribute it and/or modify |
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// | it under the terms of the GNU General Public License as published by |
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// | the Free Software Foundation |
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// | |
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// | This program is distributed in the hope that it will be useful, but |
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// | WITHOUT ANY WARRANTY; without even the implied warranty of |
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// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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// | General Public License for more details. |
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// | |
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// | You should have received a copy of the GNU General Public License |
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// | along with this program; if not, write to the Free Software |
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// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
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// | USA. |
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// +-----------------------------------------------------------------------+
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/** returns a category id that corresponds to the given permalink (or null)
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* @param string permalink
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*/
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function get_cat_id_from_permalink( $permalink )
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{
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$query ='
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SELECT id FROM '.CATEGORIES_TABLE.'
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WHERE permalink="'.$permalink.'"';
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$ids = array_from_query($query, 'id');
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if (!empty($ids))
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{
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return $ids[0];
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}
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return null;
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}
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/** returns a category id that has used before this permalink (or null)
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* @param string permalink
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* @param boolean is_hit if true update the usage counters on the old permalinks
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*/
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function get_cat_id_from_old_permalink($permalink)
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{
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$query='
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SELECT c.id
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FROM '.OLD_PERMALINKS_TABLE.' op INNER JOIN '.CATEGORIES_TABLE.' c
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ON op.cat_id=c.id
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WHERE op.permalink="'.$permalink.'"
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LIMIT 1';
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$result = pwg_query($query);
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$cat_id = null;
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if ( mysql_num_rows($result) )
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list( $cat_id ) = mysql_fetch_array($result);
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return $cat_id;
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}
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/** deletes the permalink associated with a category
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* returns true on success
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* @param int cat_id the target category id
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* @param boolean save if true, the current category-permalink association
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* is saved in the old permalinks table in case external links hit it
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*/
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function delete_cat_permalink( $cat_id, $save )
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{
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global $page, $cache;
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$query = '
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SELECT permalink
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FROM '.CATEGORIES_TABLE.'
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WHERE id="'.$cat_id.'"
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;';
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$result = pwg_query($query);
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if ( mysql_num_rows($result) )
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{
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list($permalink) = mysql_fetch_array($result);
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}
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if ( !isset($permalink) )
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{// no permalink; nothing to do
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return true;
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}
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if ($save)
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{
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$old_cat_id = get_cat_id_from_old_permalink($permalink);
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if ( isset($old_cat_id) and $old_cat_id!=$cat_id )
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{
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$page['errors'][] =
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sprintf(
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l10n('Permalink_%s_histo_used_by_%s'),
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$permalink, $old_cat_id
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);
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return false;
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}
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}
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$query = '
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UPDATE '.CATEGORIES_TABLE.'
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SET permalink=NULL
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WHERE id='.$cat_id.'
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LIMIT 1';
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pwg_query($query);
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unset( $cache['cat_names'] ); //force regeneration
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if ($save)
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{
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if ( isset($old_cat_id) )
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{
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$query = '
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UPDATE '.OLD_PERMALINKS_TABLE.'
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SET date_deleted=NOW()
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WHERE cat_id='.$cat_id.' AND permalink="'.$permalink.'"';
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}
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else
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{
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$query = '
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INSERT INTO '.OLD_PERMALINKS_TABLE.'
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(permalink, cat_id, date_deleted)
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VALUES
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( "'.$permalink.'",'.$cat_id.',NOW() )';
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}
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pwg_query( $query );
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}
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return true;
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}
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/** sets a new permalink for a category
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* returns true on success
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* @param int cat_id the target category id
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* @param string permalink the new permalink
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* @param boolean save if true, the current category-permalink association
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* is saved in the old permalinks table in case external links hit it
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*/
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function set_cat_permalink( $cat_id, $permalink, $save )
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{
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global $page, $cache;
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$sanitized_permalink = preg_replace( '#[^a-zA-Z0-9_/-]#', '' ,$permalink);
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$sanitized_permalink = trim($sanitized_permalink, '/');
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$sanitized_permalink = str_replace('//', '/', $sanitized_permalink);
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if ( $sanitized_permalink != $permalink
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or preg_match( '#^(\d)+(-.*)?$#', $permalink) )
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{
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$page['errors'][] = l10n('Permalink_name_rule');
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return false;
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}
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// check if the new permalink is actively used
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$existing_cat_id = get_cat_id_from_permalink( $permalink );
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if ( isset($existing_cat_id) )
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{
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if ( $existing_cat_id==$cat_id )
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{// no change required
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return true;
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}
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else
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{
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$page['errors'][] =
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sprintf(
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l10n('Permalink %s is already used by category %s'),
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$permalink, $existing_cat_id
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);
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return false;
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}
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}
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// check if the new permalink was historically used
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$old_cat_id = get_cat_id_from_old_permalink($permalink);
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if ( isset($old_cat_id) and $old_cat_id!=$cat_id )
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{
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$page['errors'][] =
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sprintf(
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l10n('Permalink_%s_histo_used_by_%s'),
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$permalink, $old_cat_id
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);
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return false;
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}
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if ( !delete_cat_permalink($cat_id, $save ) )
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{
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return false;
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}
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if ( isset($old_cat_id) )
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{// the new permalink must not be active and old at the same time
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assert( $old_cat_id==$cat_id );
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$query = '
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DELETE FROM '.OLD_PERMALINKS_TABLE.'
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WHERE cat_id='.$old_cat_id.' AND permalink="'.$permalink.'"';
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pwg_query($query);
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}
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$query = '
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UPDATE '.CATEGORIES_TABLE.'
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SET permalink="'.$permalink.'"
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WHERE id='.$cat_id.'
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LIMIT 1';
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pwg_query($query);
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unset( $cache['cat_names'] ); //force regeneration
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return true;
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}
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?>
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