<?php // +-----------------------------------------------------------------------+ // | Piwigo - a PHP based picture gallery | // +-----------------------------------------------------------------------+ // | Copyright(C) 2008-2009 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. | // +-----------------------------------------------------------------------+ define('REQUIRED_SQLITE_VERSION', '3.0.0'); define('DB_ENGINE', 'SQLite'); define('DB_REGEX_OPERATOR', 'REGEXP'); define('DB_RANDOM_FUNCTION', 'RANDOM'); /** * * simple functions * */ function pwg_db_connect($host, $user, $password, $database) { global $conf; $db_file = sprintf('%s/%s.db', $conf['local_data_dir'], $database); if (script_basename()=='install') { $sqlite_open_mode = SQLITE3_OPEN_READWRITE | SQLITE3_OPEN_CREATE; } else { $sqlite_open_mode = SQLITE3_OPEN_READWRITE; } try { $link = new SQLite3($db_file, $sqlite_open_mode); } catch (Exception $e) { my_error('sqlite::open', true); } $link->createFunction('now', 'pwg_now', 0); $link->createFunction('unix_timestamp', 'pwg_unix_timestamp', 0); $link->createFunction('md5', 'md5', 1); $link->createFunction('if', 'pwg_if', 3); $link->createAggregate('std', 'pwg_std_step', 'pwg_std_finalize'); $link->createFunction('regexp', 'pwg_regexp', 2); return $link; } function pwg_db_check_charset() { return true; } function pwg_get_db_version() { global $pwg_db_link; $versionInfos = $pwg_db_link->version(); return $versionInfos['versionString']; } function pwg_query($query) { global $conf,$page,$debug,$t2,$pwg_db_link; $start = get_moment(); $truncate_pattern = '`truncate(.*)`i'; $insert_pattern = '`(INSERT INTO [^)]*\)\s*VALUES)(\([^)]*\))\s*,\s*(.*)`mi'; if (preg_match($truncate_pattern, $query, $matches)) { $query = str_replace('TRUNCATE TABLE', 'DELETE FROM', $query); $truncate_query = true; ($result = $pwg_db_link->exec($query)) or die($query."\n<br>".$pwg_db_link->lastErrorMsg()); } elseif (preg_match($insert_pattern, $query, $matches)) { $base_query = substr($query, 0, strlen($matches[1])+1); $values_pattern = '`\)\s*,\s*\(`'; $values = preg_split($values_pattern, substr($query, strlen($matches[1])+1)); $values[0] = substr($values[0], 1); $values[count($values)-1] = substr($values[count($values)-1], 0, strlen($values[count($values)-1])-1 ); for ($n=0;$n<count($values);$n++) { $query = $base_query . '('. $values[$n] . ")\n;"; ($result = $pwg_db_link->query($query)) or die($query."\n<br>".$pwg_db_link->lastErrorMsg()); } } else { ($result = $pwg_db_link->query($query)) or die($query."\n<br>".$pwg_db_link->lastErrorMsg()); } $time = get_moment() - $start; if (!isset($page['count_queries'])) { $page['count_queries'] = 0; $page['queries_time'] = 0; } $page['count_queries']++; $page['queries_time']+= $time; if ($conf['show_queries']) { $output = ''; $output.= '<pre>['.$page['count_queries'].'] '; $output.= "\n".$query; $output.= "\n".'(this query time : '; $output.= '<b>'.number_format($time, 3, '.', ' ').' s)</b>'; $output.= "\n".'(total SQL time : '; $output.= number_format($page['queries_time'], 3, '.', ' ').' s)'; $output.= "\n".'(total time : '; $output.= number_format( ($time+$start-$t2), 3, '.', ' ').' s)'; if ( $result!=null and preg_match('/\s*SELECT\s+/i',$query) ) { $output.= "\n".'(num rows : '; $output.= pwg_db_num_rows($result).' )'; } elseif ( $result!=null and preg_match('/\s*INSERT|UPDATE|REPLACE|DELETE\s+/i',$query) and !isset($truncate_query)) { $output.= "\n".'(affected rows : '; $output.= pwg_db_changes($result).' )'; } $output.= "</pre>\n"; $debug .= $output; } return $result; } function pwg_db_nextval($column, $table) { $query = ' SELECT MAX('.$column.')+1 FROM '.$table; list($next) = pwg_db_fetch_row(pwg_query($query)); if (is_null($next)) { $next = 1; } return $next; } /** * * complex functions * */ function pwg_db_changes(SQLite3Result $result=null) { global $pwg_db_link; return $pwg_db_link->changes(); } function pwg_db_num_rows($result) { return $result->numColumns(); } function pwg_db_fetch_assoc($result) { return $result->fetchArray(SQLITE3_ASSOC); } function pwg_db_fetch_row($result) { return $result->fetchArray(SQLITE3_NUM); } function pwg_db_fetch_object($result) { return $result; } function pwg_db_free_result($result) { } function pwg_db_real_escape_string($s) { global $pwg_db_link; return $pwg_db_link->escapeString($s); } function pwg_db_insert_id($table=null, $column='id') { global $pwg_db_link; return $pwg_db_link->lastInsertRowID(); } /** * * complex functions * */ /** * creates an array based on a query, this function is a very common pattern * used here * * @param string $query * @param string $fieldname * @return array */ function array_from_query($query, $fieldname) { $array = array(); $result = pwg_query($query); while ($row = pwg_db_fetch_assoc($result)) { array_push($array, $row[$fieldname]); } return $array; } define('MASS_UPDATES_SKIP_EMPTY', 1); /** * updates multiple lines in a table * * @param string table_name * @param array dbfields * @param array datas * @param int flags - if MASS_UPDATES_SKIP_EMPTY - empty values do not overwrite existing ones * @return void */ function mass_updates($tablename, $dbfields, $datas, $flags=0) { if (count($datas) == 0) return; foreach ($datas as $data) { $query = ' UPDATE '.$tablename.' SET '; $is_first = true; foreach ($dbfields['update'] as $key) { $separator = $is_first ? '' : ",\n "; if (isset($data[$key]) and $data[$key] != '') { $query.= $separator.$key.' = \''.$data[$key].'\''; } else { if ($flags & MASS_UPDATES_SKIP_EMPTY ) continue; // next field $query.= "$separator$key = NULL"; } $is_first = false; } if (!$is_first) {// only if one field at least updated $query.= ' WHERE '; $is_first = true; foreach ($dbfields['primary'] as $key) { if (!$is_first) { $query.= ' AND '; } if ( isset($data[$key]) ) { $query.= $key.' = \''.$data[$key].'\''; } else { $query.= $key.' IS NULL'; } $is_first = false; } pwg_query($query); } } } /** * inserts multiple lines in a table * * @param string table_name * @param array dbfields * @param array inserts * @return void */ function mass_inserts($table_name, $dbfields, $datas) { if (count($datas) != 0) { $first = true; $packet_size = 16777216; $packet_size = $packet_size - 2000; // The last list of values MUST not exceed 2000 character*/ $query = ''; foreach ($datas as $insert) { if (strlen($query) >= $packet_size) { pwg_query($query); $first = true; } if ($first) { $query = ' INSERT INTO '.$table_name.' ('.implode(',', $dbfields).') VALUES'; $first = false; } else { $query .= ' , '; } $query .= '('; foreach ($dbfields as $field_id => $dbfield) { if ($field_id > 0) { $query .= ','; } if (!isset($insert[$dbfield]) or $insert[$dbfield] === '') { $query .= 'NULL'; } else { $query .= "'".$insert[$dbfield]."'"; } } $query .= ')'; } pwg_query($query); } } /** * Do maintenance on all PWG tables * * @return none */ function do_maintenance_all_tables() { global $prefixeTable, $page; $all_tables = array(); // List all tables $query = 'SELECT name FROM SQLITE_MASTER WHERE name LIKE \''.$prefixeTable.'%\''; $all_tables = array_from_query($query, 'name'); foreach ($all_tables as $table_name) { $query = 'VACUUM '.$table_name.';'; $result = pwg_query($query); } array_push($page['infos'], l10n('Optimizations completed') ); } function pwg_db_concat($array) { return implode($array, ' || '); } function pwg_db_concat_ws($array, $separator) { $glue = sprintf(' || \'%s\' || ', $separator); return implode($array, $glue); } function pwg_db_cast_to_text($string) { return $string; } /** * returns an array containing the possible values of an enum field * * @param string tablename * @param string fieldname */ function get_enums($table, $field) { return array(); } // get_boolean transforms a string to a boolean value. If the string is // "false" (case insensitive), then the boolean value false is returned. In // any other case, true is returned. function get_boolean( $string ) { $boolean = true; if ('f' === $string || 'false' === $string) { $boolean = false; } return $boolean; } /** * returns boolean string 'true' or 'false' if the given var is boolean * * @param mixed $var * @return mixed */ function boolean_to_string($var) { if (!empty($var) && ($var == 'true')) { return 'true'; } else { return 'false'; } } /** * * interval and date functions * */ function pwg_db_get_recent_period_expression($period, $date='CURRENT_DATE') { if ($date!='CURRENT_DATE') { $date = '\''.$date.'\''; } return 'date('.$date.',\''.-$period.' DAY\')'; } function pwg_db_get_recent_period($period, $date='CURRENT_DATE') { $query = 'select '.pwg_db_get_recent_period_expression($period, $date); list($d) = pwg_db_fetch_row(pwg_query($query)); return $d; } function pwg_db_get_date_YYYYMM($date) { return 'strftime(\'%Y%m\','.$date.')'; } function pwg_db_get_date_MMDD($date) { return 'strftime(\'%m%d\','.$date.')'; } function pwg_db_get_year($date) { return 'strftime(\'%Y\','.$date.')'; } function pwg_db_get_month($date) { return 'strftime(\'%m\','.$date.')'; } function pwg_db_get_week($date, $mode=null) { return 'strftime(\'%W\','.$date.')'; } function pwg_db_get_dayofmonth($date) { return 'strftime(\'%d\','.$date.')'; } function pwg_db_get_dayofweek($date) { return 'strftime(\'%w\','.$date.')'; } function pwg_db_get_weekday($date) { return 'strftime(\'%w\',date('.$date.',\'-1 DAY\'))'; } // my_error returns (or send to standard output) the message concerning the // error occured for the last mysql query. function my_error($header, $die) { global $pwg_db_link; $error = ''; if (isset($pwg_db_link)) { $error .= '[sqlite error]'.$pwg_db_link->lastErrorMsg()."\n"; } $error .= $header; if ($die) { fatal_error($error); } echo("<pre>"); trigger_error($error, E_USER_WARNING); echo("</pre>"); } // sqlite create functions function pwg_now() { return date('Y-m-d H:i:s'); } function pwg_unix_timestamp() { return time(); } function pwg_if($expression, $value1, $value2) { if ($expression) { return $value1; } else { return $value2; } } function pwg_regexp($pattern, $string) { $pattern = sprintf('`%s`', $pattern); return preg_match($pattern, $string); } function pwg_std_step(&$values, $rownumber, $value) { $values[] = $value; return $values; } function pwg_std_finalize(&$values, $rownumber) { if (count($values)<=1) { return 0; } $total = 0; $total_square = 0; foreach ($values as $value) { $total += $value; $total_square += pow($value, 2); } $mean = $total/count($values); $var = $total_square/count($values) - pow($mean, 2); return sqrt($var); } ?>