diff options
Diffstat (limited to 'modules/gallery/libraries/MY_Database.php')
| -rw-r--r-- | modules/gallery/libraries/MY_Database.php | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/modules/gallery/libraries/MY_Database.php b/modules/gallery/libraries/MY_Database.php new file mode 100644 index 00000000..c56f16e8 --- /dev/null +++ b/modules/gallery/libraries/MY_Database.php @@ -0,0 +1,92 @@ +<?php defined("SYSPATH") or die("No direct script access."); +/** + * Gallery - a web based photo album viewer and editor + * Copyright (C) 2000-2009 Bharat Mediratta + * + * 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; either version 2 of the License, or (at + * your option) any later version. + * + * 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. + */ +class Database extends Database_Core { + protected $_table_names; + + public function open_paren() { + $this->where[] = "("; + return $this; + } + + public function close_paren() { + // Search backwards for the last opening paren and resolve it + $i = count($this->where) - 1; + $this->where[$i] .= ")"; + while (--$i >= 0) { + if ($this->where[$i] == "(") { + // Remove the paren from the where clauses, and add it to the right of the operator of the + // next where clause. If removing the paren makes the next where clause the first element + // in the where list, then the operator shouldn't be there. It's there because we + // calculate whether or not we need an operator based on the number of where clauses, and + // the open paren seems like a where clause even though it isn't. + array_splice($this->where, $i, 1); + $this->where[$i] = preg_replace("/^(AND|OR) /", $i ? "\\1 (" : "(", $this->where[$i]); + return $this; + } + } + + throw new Kohana_Database_Exception('database.missing_open_paren'); + } + + /** + * Parse the query string and convert any strings of the form `\([a-zA-Z0-9_]*?)\] + * table prefix . $1 + */ + public function query($sql = '') { + if (!empty($sql)) { + $sql = $this->add_table_prefixes($sql); + } + return parent::query($sql); + } + + public function add_table_prefixes($sql) { + $prefix = $this->config["table_prefix"]; + if (strpos($sql, "SHOW TABLES") === 0) { + /* + * Don't ignore "show tables", otherwise we could have a infinite + * @todo this may have to be changed if we support more than mysql + */ + return $sql; + } else if (strpos($sql, "CREATE TABLE") === 0) { + // Creating a new table add it to the table cache. + $open_brace = strpos($sql, "{") + 1; + $close_brace = strpos($sql, "}", $open_brace); + $name = substr($sql, $open_brace, $close_brace - $open_brace); + $this->_table_names["{{$name}}"] = "{$prefix}$name"; + } + + if (!isset($this->_table_names)) { + // This should only run once on the first query + $this->_table_names =array(); + $len = strlen($prefix); + foreach($this->list_tables() as $table_name) { + if ($len > 0) { + $naked_name = strpos($table_name, $prefix) !== 0 ? + $table_name : substr($table_name, $len); + } else { + $naked_name = $table_name; + } + $this->_table_names["{{$naked_name}}"] = $table_name; + } + } + + return empty($this->_table_names) ? $sql : strtr($sql, $this->_table_names); + } +}
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