[1866] | 1 | <?php |
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| 2 | // +-----------------------------------------------------------------------+ |
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| 3 | // | PhpWebGallery - a PHP based picture gallery | |
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| 4 | // | Copyright (C) 2003-2007 PhpWebGallery Team - http://phpwebgallery.net | |
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| 5 | // +-----------------------------------------------------------------------+ |
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| 6 | // | file : $Id: admin/function_permalinks.inc.php$ |
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| 7 | // | last update : $Date: 2007-06-28 02:16:03 +0000 (Thu, 28 Jun 2007) $ |
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| 8 | // | last modifier : $Author: rvelices $ |
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| 9 | // | revision : $Revision: 2047 $ |
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| 10 | // +-----------------------------------------------------------------------+ |
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| 11 | // | This program is free software; you can redistribute it and/or modify | |
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| 12 | // | it under the terms of the GNU General Public License as published by | |
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| 13 | // | the Free Software Foundation | |
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| 14 | // | | |
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| 15 | // | This program is distributed in the hope that it will be useful, but | |
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| 16 | // | WITHOUT ANY WARRANTY; without even the implied warranty of | |
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| 17 | // | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
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| 18 | // | General Public License for more details. | |
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| 19 | // | | |
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| 20 | // | You should have received a copy of the GNU General Public License | |
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| 21 | // | along with this program; if not, write to the Free Software | |
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| 22 | // | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
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| 23 | // | USA. | |
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| 24 | // +-----------------------------------------------------------------------+ |
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| 25 | |
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[2047] | 26 | /** returns a category id that corresponds to the given permalink (or null) |
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| 27 | * @param string permalink |
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| 28 | */ |
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| 29 | function get_cat_id_from_permalink( $permalink ) |
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| 30 | { |
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| 31 | $query =' |
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| 32 | SELECT id FROM '.CATEGORIES_TABLE.' |
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| 33 | WHERE permalink="'.$permalink.'"'; |
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| 34 | $ids = array_from_query($query, 'id'); |
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| 35 | if (!empty($ids)) |
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| 36 | { |
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| 37 | return $ids[0]; |
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| 38 | } |
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| 39 | return null; |
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| 40 | } |
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| 41 | |
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| 42 | /** returns a category id that has used before this permalink (or null) |
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| 43 | * @param string permalink |
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| 44 | * @param boolean is_hit if true update the usage counters on the old permalinks |
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| 45 | */ |
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| 46 | function get_cat_id_from_old_permalink($permalink) |
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| 47 | { |
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| 48 | $query=' |
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| 49 | SELECT c.id |
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| 50 | FROM '.OLD_PERMALINKS_TABLE.' op INNER JOIN '.CATEGORIES_TABLE.' c |
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| 51 | ON op.cat_id=c.id |
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| 52 | WHERE op.permalink="'.$permalink.'" |
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| 53 | LIMIT 1'; |
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| 54 | $result = pwg_query($query); |
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| 55 | $cat_id = null; |
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| 56 | if ( mysql_num_rows($result) ) |
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| 57 | list( $cat_id ) = mysql_fetch_array($result); |
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| 58 | return $cat_id; |
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| 59 | } |
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| 60 | |
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| 61 | |
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[1866] | 62 | /** deletes the permalink associated with a category |
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| 63 | * returns true on success |
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| 64 | * @param int cat_id the target category id |
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| 65 | * @param boolean save if true, the current category-permalink association |
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| 66 | * is saved in the old permalinks table in case external links hit it |
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| 67 | */ |
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| 68 | function delete_cat_permalink( $cat_id, $save ) |
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| 69 | { |
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| 70 | global $page, $cache; |
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| 71 | $query = ' |
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| 72 | SELECT permalink |
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| 73 | FROM '.CATEGORIES_TABLE.' |
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| 74 | WHERE id="'.$cat_id.'" |
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| 75 | ;'; |
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| 76 | $result = pwg_query($query); |
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| 77 | if ( mysql_num_rows($result) ) |
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| 78 | { |
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| 79 | list($permalink) = mysql_fetch_array($result); |
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| 80 | } |
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| 81 | if ( !isset($permalink) ) |
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| 82 | {// no permalink; nothing to do |
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| 83 | return true; |
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| 84 | } |
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| 85 | if ($save) |
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| 86 | { |
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[2047] | 87 | $old_cat_id = get_cat_id_from_old_permalink($permalink); |
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[1866] | 88 | if ( isset($old_cat_id) and $old_cat_id!=$cat_id ) |
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| 89 | { |
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| 90 | $page['errors'][] = |
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| 91 | sprintf( |
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| 92 | l10n('Permalink_%s_histo_used_by_%s'), |
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| 93 | $permalink, $old_cat_id |
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| 94 | ); |
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| 95 | return false; |
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| 96 | } |
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| 97 | } |
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| 98 | $query = ' |
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| 99 | UPDATE '.CATEGORIES_TABLE.' |
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| 100 | SET permalink=NULL |
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| 101 | WHERE id='.$cat_id.' |
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| 102 | LIMIT 1'; |
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| 103 | pwg_query($query); |
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| 104 | |
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| 105 | unset( $cache['cat_names'] ); //force regeneration |
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| 106 | if ($save) |
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| 107 | { |
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| 108 | if ( isset($old_cat_id) ) |
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| 109 | { |
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| 110 | $query = ' |
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| 111 | UPDATE '.OLD_PERMALINKS_TABLE.' |
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| 112 | SET date_deleted=NOW() |
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| 113 | WHERE cat_id='.$cat_id.' AND permalink="'.$permalink.'"'; |
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| 114 | } |
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| 115 | else |
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| 116 | { |
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| 117 | $query = ' |
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| 118 | INSERT INTO '.OLD_PERMALINKS_TABLE.' |
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| 119 | (permalink, cat_id, date_deleted) |
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| 120 | VALUES |
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| 121 | ( "'.$permalink.'",'.$cat_id.',NOW() )'; |
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| 122 | } |
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| 123 | pwg_query( $query ); |
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| 124 | } |
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| 125 | return true; |
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| 126 | } |
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| 127 | |
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| 128 | /** sets a new permalink for a category |
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| 129 | * returns true on success |
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| 130 | * @param int cat_id the target category id |
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| 131 | * @param string permalink the new permalink |
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| 132 | * @param boolean save if true, the current category-permalink association |
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| 133 | * is saved in the old permalinks table in case external links hit it |
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| 134 | */ |
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| 135 | function set_cat_permalink( $cat_id, $permalink, $save ) |
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| 136 | { |
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| 137 | global $page, $cache; |
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| 138 | |
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[2047] | 139 | $sanitized_permalink = preg_replace( '#[^a-zA-Z0-9_/-]#', '' ,$permalink); |
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| 140 | $sanitized_permalink = trim($sanitized_permalink, '/'); |
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| 141 | $sanitized_permalink = str_replace('//', '/', $sanitized_permalink); |
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[1866] | 142 | if ( $sanitized_permalink != $permalink |
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[1873] | 143 | or preg_match( '#^(\d)+(-.*)?$#', $permalink) ) |
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[1866] | 144 | { |
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| 145 | $page['errors'][] = l10n('Permalink_name_rule'); |
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| 146 | return false; |
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| 147 | } |
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| 148 | |
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[1873] | 149 | // check if the new permalink is actively used |
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[1866] | 150 | $existing_cat_id = get_cat_id_from_permalink( $permalink ); |
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| 151 | if ( isset($existing_cat_id) ) |
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| 152 | { |
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| 153 | if ( $existing_cat_id==$cat_id ) |
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| 154 | {// no change required |
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| 155 | return true; |
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| 156 | } |
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| 157 | else |
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| 158 | { |
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| 159 | $page['errors'][] = |
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| 160 | sprintf( |
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| 161 | l10n('Permalink %s is already used by category %s'), |
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| 162 | $permalink, $existing_cat_id |
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| 163 | ); |
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| 164 | return false; |
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| 165 | } |
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| 166 | } |
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| 167 | |
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[1873] | 168 | // check if the new permalink was historically used |
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[2047] | 169 | $old_cat_id = get_cat_id_from_old_permalink($permalink); |
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[1873] | 170 | if ( isset($old_cat_id) and $old_cat_id!=$cat_id ) |
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[1866] | 171 | { |
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[1873] | 172 | $page['errors'][] = |
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| 173 | sprintf( |
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| 174 | l10n('Permalink_%s_histo_used_by_%s'), |
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| 175 | $permalink, $old_cat_id |
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| 176 | ); |
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| 177 | return false; |
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[1866] | 178 | } |
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[1873] | 179 | |
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[1866] | 180 | if ( !delete_cat_permalink($cat_id, $save ) ) |
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| 181 | { |
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| 182 | return false; |
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| 183 | } |
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| 184 | |
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[1873] | 185 | if ( isset($old_cat_id) ) |
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| 186 | {// the new permalink must not be active and old at the same time |
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| 187 | assert( $old_cat_id==$cat_id ); |
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| 188 | $query = ' |
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| 189 | DELETE FROM '.OLD_PERMALINKS_TABLE.' |
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| 190 | WHERE cat_id='.$old_cat_id.' AND permalink="'.$permalink.'"'; |
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| 191 | pwg_query($query); |
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| 192 | } |
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| 193 | |
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[1866] | 194 | $query = ' |
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| 195 | UPDATE '.CATEGORIES_TABLE.' |
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| 196 | SET permalink="'.$permalink.'" |
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| 197 | WHERE id='.$cat_id.' |
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| 198 | LIMIT 1'; |
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| 199 | pwg_query($query); |
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| 200 | |
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| 201 | unset( $cache['cat_names'] ); //force regeneration |
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| 202 | |
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| 203 | return true; |
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| 204 | } |
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| 205 | |
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| 206 | ?> |
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