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utfdbmigrate.php
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utfdbmigrate.php
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<?php //$Id$
///dummy field names are used to help adding and dropping indexes. There's only 1 case now, in scorm_scoes_track
require_once('../config.php');
require_once($CFG->libdir.'/adminlib.php');
require_once($CFG->libdir.'/environmentlib.php');
require_login();
if (!isadmin()) {
error('Only admins can access this page');
}
if (!$site = get_site()) {
redirect('index.php');
}
if (!empty($CFG->unicodedb)) {
error ('unicode db migration has already been performed!');
}
$migrate = optional_param('migrate', 0, PARAM_BOOL);
$confirm = optional_param('confirm', 0, PARAM_BOOL);
$textlib = textlib_get_instance();
$stradministration = get_string('administration');
$strdbmigrate = get_string('dbmigrate','admin');
$filename = $CFG->dataroot.'/'.SITEID.'/maintenance.html'; //maintenance file
print_header("$site->shortname: $stradministration", "$site->fullname",
'<a href="index.php">'. "$stradministration</a> -> $strdbmigrate");
print_heading($strdbmigrate);
//if $confirm
if ($confirm && confirm_sesskey()) {
//do the real migration of db
print_simple_box_start('center','50%');
print_string('importlangreminder','admin');
print_simple_box_end();
db_migrate2utf8();
print_heading('db unicode migration has been completed!');
unlink($filename); //no longer in maintenance mode
@require_logout();
print_continue($CFG->wwwroot.'/admin/langimport.php');
}
//else if $migrate
else if ($migrate && confirm_sesskey()) {
if ($CFG->dbtype == 'postgres7' && !is_postgres_utf8()) {
$continue = false;
if (($form = data_submitted()) && isset($form->dbhost)) {
validate_form($form, $err);
if (count($err) == 0) {
$_SESSION['newpostgresdb'] = $form;
$continue = true;
}
}
} else {
$continue = true;
}
if ($continue) {
echo '<div align="center">';
print_simple_box_start('center','50%');
print_string('dbmigratewarning2','admin');
print_simple_box_end();
//put the site in maintenance mode
check_dir_exists($CFG->dataroot.'/'.SITEID, true);
if (touch($filename)) {
$file = fopen($filename, 'w');
fwrite($file, get_string('maintinprogress','admin'));
fclose($file);
} else {
notify (get_string('maintfileopenerror','admin'));
}
//print second confirmation box
echo '<form name="migratefrom" action="utfdbmigrate.php" method="POST">';
echo '<input name="confirm" type="hidden" value="1" />';
echo '<input name="sesskey" type="hidden" value="'.sesskey().'" />';
$xmls = utf_get_xml();
$sumrecords = 0; //this is the sum of all records of relavent tables.
foreach ($xmls as $xml) { ///foreach xml file, we must get a list of tables
$dbtables = $xml['DBMIGRATION']['#']['TABLES'][0]['#']['TABLE']; //real db tables
foreach ($dbtables as $dbtable) {
$dbtablename = $dbtable['@']['name'];
$sumrecords += count_records($dbtablename);
}
}
echo 'Total number of records in your database is <b>'.$sumrecords.'</b>';
if ($sumrecords > 10000) {
echo '<br />Number of Records to process before halting (Leave blank for no limit) <input name="maxrecords" type="text" value="" />';
}
//print the "i-know-what-lang-to-use" menu
$enc = array('af' => 'iso-8859-1', 'ar' => 'windows-1256', 'be' => 'windows-1251', 'bg' => 'windows-1251', 'bs' => 'windows-1250', 'cs' => 'iso-8859-2', 'da' => 'iso-8859-1', 'de' => 'iso-8859-1', 'de_du' => 'iso-8859-1', 'de_utf8' => 'utf-8', 'el' => 'windows-1253', 'en' => 'iso-8859-1', 'en_ja' => 'euc-jp', 'en_us' => 'iso-8859-1', 'en_utf8' => 'utf-8', 'es' => 'iso-8859-1', 'es_ar' => 'iso-8859-1', 'es_es' => 'iso-8859-1', 'es_mx' => 'iso-8859-1', 'et' => 'iso-8859-1', 'eu' => 'iso-8859-1', 'fa' => 'windows-1256', 'fa_utf8' => 'utf-8', 'fi' => 'iso-8859-1', 'fil' => 'iso-8859-15', 'fr' => 'iso-8859-1', 'fr_ca' => 'iso-8859-15', 'ga' => 'iso-8859-1', 'gl' => 'iso-8859-1', 'he' => 'ISO-8859-8-I', 'he_utf8' => 'utf-8', 'hi' => 'iso-8859-1', 'hr' => 'windows-1250', 'hr_utf8' => 'utf-8', 'hu' => 'iso-8859-2', 'id' => 'iso-8859-1', 'it' => 'iso-8859-1', 'ja' => 'EUC-JP', 'ja_utf8' => 'UTF-8', 'ka_utf8' => 'UTF-8', 'km_utf8' => 'UTF-8', 'kn_utf8' => 'utf-8', 'ko' => 'EUC-KR', 'ko_utf8' => 'UTF-8', 'lt' => 'windows-1257', 'lv' => 'ISO-8859-4', 'mi_nt' => 'iso-8859-1', 'mi_tn_utf8' => 'utf-8', 'ms' => 'iso-8859-1', 'nl' => 'iso-8859-1', 'nn' => 'iso-8859-1', 'no' => 'iso-8859-1', 'no_gr' => 'iso-8859-1', 'pl' => 'iso-8859-2', 'pt' => 'iso-8859-1', 'pt_br' => 'iso-8859-1', 'ro' => 'iso-8859-2', 'ru' => 'windows-1251', 'sk' => 'iso-8859-2', 'sl' => 'iso-8859-2', 'sl_utf8' => 'utf-8', 'so' => 'iso-8859-1', 'sq' => 'iso-8859-1', 'sr_utf8' => 'utf-8', 'sv' => 'iso-8859-1', 'th' => 'TIS-620', 'th_utf8' => 'UTF-8', 'tl' => 'iso-8859-15', 'tl_utf8' => 'UTF-8', 'tr' => 'iso-8859-9', 'uk' => 'windows-1251', 'vi_utf8' => 'UTF-8', 'zh_cn' => 'GB18030', 'zh_cn_utf8' => 'UTF-8', 'zh_tw' => 'Big5', 'zh_tw_utf8' => 'UTF-8');
echo '<br />The whole site is in this encoding: (leave blank if you are not sure)';
echo '<select name="globallang"><option value="">I am not sure</option>';
foreach ($enc as $lang => $encoding) {
echo '<option value="'.$encoding.'">'.$lang.'</option>';
}
echo '</select>';
echo '<p /><input type="submit" value="'.get_string('continue').'"/>';
echo '<input type="button" value="'.get_string('cancel').'" onclick="javascript:history.go(-1)" />';
echo '</form>';
echo '</div>';
} else {
echo '<div align="center">';
print_simple_box_start('center','50%');
print_string('dbmigratepostgres','admin');
print_simple_box_end();
print_simple_box_start("center", "");
include("utfdbmigrate.html");
print_simple_box_end();
}
}
else { //else, print welcome to migrate page message
echo '<div align="center">';
print_simple_box_start('center','50%');
print_string('dbmigratewarning','admin');
print_simple_box_end();
/*************************************
* Eloy's environement checking code *
*************************************/
$current_version = $CFG->release;
/// Gather and show results
$status = check_moodle_environment($current_version, $environment_results);
//end of env checking
/// We only allow to continue if environmental checks have been passed ok
if ($status) {
echo '<form name="migratefrom" action="utfdbmigrate.php" method="POST">';
echo '<input name="migrate" type="hidden" value="1" />';
echo '<input name="sesskey" type="hidden" value="'.sesskey().'" />';
echo '<input type="submit" value="'.get_string('continue').'"/>';
echo ' <input type="button" value="'.get_string('cancel').'" onclick="javascript:history.go(-1)" />';
echo '</form>';
echo '</div>';
}
}
print_footer();
function db_migrate2utf8(){ //Eloy: Perhaps some type of limit parameter here
//pointing to the num of records to process would be
//useful. And it won't break anything, because the
//crash system will continue the next time it was
//executed. Also, the function could return:
//0 = Some sort of error
//1 = Finished completelly!
//2 = Finished limit records
//(using constants, of course ;-))
//Then, all those errors, should be converted to
//mtrace() and return 0. (showing the current
//table/field/recordid)
global $db, $CFG;
$debug = ($CFG->debug > 7);
@set_time_limit(0);
@ob_implicit_flush(true);
@ob_end_flush();
$maxrecords = optional_param('maxrecords', 0, PARAM_INT);
$globallang = optional_param('globallang', '', PARAM_FILE);
$processedrecords = 0;
$ignoretables = array(); //list of tables to ignore, optional
$done = 0;
print_progress($done, 158, 5, 1);
$textlib = textlib_get_instance(); //only 1 reference
//if unicodedb is set, migration is complete. die here;
if (!$crash = get_record('config','name','dbmigration')) {
//Duplicate the database if not unicode for postgres7
if ($CFG->dbtype == 'postgres7' && !is_postgres_utf8() && !is_postgres_setup()) {
echo '<script>';
echo 'document.getElementById("text").innerHTML = "Copying data to the UTF8 database for processing...";'."\n";
echo '</script>';
if ($_SESSION['newpostgresdb']->dbcluster) {
$cluster = ' --cluster ' . $_SESSION['newpostgresdb']->dbcluster;
} else {
$cluster = '';
}
$cmd = "PGPASSWORD={$CFG->dbpass} pg_dump -Fp -E 'UNICODE' -O -x -U {$CFG->dbuser}$cluster";
if ($CFG->dbhost) {
$host = split(":", $CFG->dbhost);
if ($host[0]) $cmd .= " -h {$host[0]}";
if (isset($host[1])) $cmd .= " -p {$host[1]}";
}
$cmd .= " {$CFG->dbname} | iconv -f UTF-8 -t UTF-8 -c | PGPASSWORD={$_SESSION['newpostgresdb']->dbpass} psql -q -U {$_SESSION['newpostgresdb']->dbuser} -v ON_ERROR_STOP=1$cluster";
if ($_SESSION['newpostgresdb']->dbhost) {
$host = split(":", $_SESSION['newpostgresdb']->dbhost);
if ($host[0]) $cmd .= " -h {$host[0]}";
if (isset($host[1])) $cmd .= " -p {$host[1]}";
}
$cmd .= " {$_SESSION['newpostgresdb']->dbname}";
exec($cmd.' 2>&1 > /dev/null', $output, $return_var);
if ($return_var) { // we are dead!
echo '<br />';
print_simple_box_start('center','50%');
print_string('dbmigrationdupfailed','admin',htmlspecialchars(implode("\n", $output)));
print_simple_box_end();
print_footer();
exit;
}
}
$migrationconfig = new object;
$migrationconfig->name = 'dbmigration';
$migrationconfig->value = '-1';
insert_record('config',$migrationconfig); //process initiated
//langs used, to help make recommendations on what lang packs to install
$langsused = new object;
$langsused->name = 'langsused';
$langsused->value = '';
insert_record('config',$langsused);
} else {
$crashdata = explode('##',$crash->value);
$crash->table = $crashdata[0];
$crash->field = $crashdata[1];
$crash->record = $crashdata[2];
print_heading('Resume information :');
echo '<br>Resuming from @ table : '.$crash->table;
echo '<br>Resuming from @ field : '.$crash->field;
echo '<br>Resuming from @ record : '.$crash->record;
}
require_once($CFG->dirroot.'/lib/xmlize.php');
//one gigantic array to hold all db table information read from all the migrate2utf8.xml file.
$xmls = utf_get_xml();
/************************************************************************
* Now we got all our tables in order *
************************************************************************/
foreach ($xmls as $xml) { ///foreach xml file, we must get a list of tables
$dir = $xml['DBMIGRATION']['@']['type'];
$dbtables = $xml['DBMIGRATION']['#']['TABLES'][0]['#']['TABLE']; //real db tables
foreach ($dbtables as $dbtable) {
$done++;
print_progress($done, 158, 5, 1);
$dbtablename = $dbtable['@']['name'];
if ($crash && ($dbtablename != $crash->table)) { //resuming from crash
continue;
}
if ($debug) {
print_heading("<br><b>Processsing db table ".$dbtablename.'...</b>');
}
if (!empty($dbtable['#']) && ($fields = $dbtable['#']['FIELDS'][0]['#']['FIELD']) and (!in_array($dbtablename, $ignoretables))) {
$colnames = array();
$coltypes = array(); //array to hold all column types for the table
$collengths = array(); //array to hold all column lengths for the table
$defaults = array(); //array to hold defaults, if any
//reset holders
$addindexarray = array();
$adduniqueindexarray = array();
$addprimaryarray = array();
foreach ($fields as $field){
//if in crash state, and field name is not the same as crash field name
$fieldname = isset($field['@']['name'])?$field['@']['name']:"";
$method = isset($field['@']['method'])?$field['@']['method']:"";
$type = isset($field['@']['type'])?$field['@']['type']:"";
$length = isset($field['@']['length'])?$field['@']['length']:"";
if ($crash && ($crash->field != $fieldname)) {
continue;
}
$dropindex = isset($field['@']['dropindex'])?$field['@']['dropindex']:"";
$addindex = isset($field['@']['addindex'])?$field['@']['addindex']:"";
$adduniqueindex = isset($field['@']['adduniqueindex'])?$field['@']['adduniqueindex']:"";
$dropprimary = isset($field['@']['dropprimary'])?$field['@']['dropprimary']:"";
$addprimary = isset($field['@']['addprimary'])?$field['@']['addprimary']:"";
$default = isset($field['@']['default'])?"'".$field['@']['default']."'":"''";
if ($fieldname != 'dummy') {
$colnames[] = $fieldname;
$coltypes[] = $type;
$collengths[]= $length;
}
if ($debug) {
echo "<br>--><b>processing db field ".$fieldname.'</b>';
echo "<br>---><b>method ".$method.'</b>';
}
$patterns[]='/RECORDID/'; //for preg_replace
$patterns[]='/\{\$CFG\-\>prefix\}/i'; //same here
if ($method == 'PLAIN_SQL_UPDATE') {
$sqldetectuser = $field['#']['SQL_DETECT_USER'][0]['#'];
$sqldetectcourse = $field['#']['SQL_DETECT_COURSE'][0]['#'];
}
else if ($method == 'PHP_FUNCTION') {
$phpfunction = 'migrate2utf8_'.$dbtablename.'_'.$fieldname;
}
///get the total number of records for this field
$totalrecords = count_records($dbtablename);
$counter = 0;
$recordsetsize = 4;
if ($crash) { //if resuming from crash
//find the number of records with id smaller than the crash id
$indexSQL = 'SELECT COUNT(*) FROM '.$CFG->prefix.$dbtablename.' WHERE id < '.$crash->record;
$counter = count_records_sql($indexSQL);
}
if ($debug) {
echo "<br>Total number of records is ..".$totalrecords;
echo "<br/>Counter is $counter";
}
/**************************
* converting each record *
**************************/
while(($counter < $totalrecords) and ($fieldname !='dummy') and ($method!='NO_CONV')) { //while there is still something
$SQL = 'SELECT * FROM '.$CFG->prefix.$dbtablename.' ORDER BY id ASC '.sql_paging_limit($counter, $recordsetsize);
if ($records = get_records_sql($SQL)) {
foreach ($records as $record) {
//if we are up this far, either no crash, or crash with same table, field name.
if ($crash){
if ($crash->record != $record->id) { //might set to < just in case record is deleted
continue;
} else {
$crash = 0;
print_heading('recovering from '.$dbtablename.'--'.$fieldname.'--'.$record->id);
}
}
$migrationconfig = get_record('config','name','dbmigration');
$migrationconfig->name = 'dbmigration';
$migrationconfig->value = $dbtablename.'##'.$fieldname.'##'.$record->id;
update_record('config',$migrationconfig);
$replacements = array(); //manual refresh
$replacements[] = $record->id;
$replacements[] = $CFG->prefix;
switch ($method){
case 'PLAIN_SQL_UPDATE': //use the 2 statements to update
if (!empty($record->{$fieldname})) { //only update if not empty
if ($debug) {
$db->debug=999;
}
//if global lang is set, we just use that
if ($globallang) {
$fromenc = $globallang;
} else {
$userid = get_record_sql(preg_replace($patterns, $replacements, $sqldetectuser));
$courseid = get_record_sql(preg_replace($patterns, $replacements, $sqldetectcourse));
$sitelang = $CFG->lang;
$courselang = get_course_lang(isset($courseid->course)?$courseid->course:1);
$userlang = get_user_lang(isset($userid->userid)?$userid->userid:1);
$fromenc = get_original_encoding($sitelang, $courselang, $userlang);
}
//only update if non utf8
if (($fromenc != 'utf-8') && ($fromenc != 'UTF-8')) {
$result = utfconvert($record->{$fieldname}, $fromenc);
$newrecord = new object;
$newrecord->id = $record->id;
$newrecord->{$fieldname} = $result;
migrate2utf8_update_record($dbtablename,$newrecord);
}
if ($debug) {
$db->debug=0;
}
}
break;
case 'PHP_FUNCTION': //use the default php function to execute
if ($debug) {
$db->debug=999;
}
require_once($CFG->dirroot.'/'.$dir.'/db/migrate2utf8.php');
$phpfunction($record->id);
if ($debug) {
$db->debug=0;
}
break;
default: //no_conv, don't do anything ;-)
break;
}
$counter++;
if ($maxrecords) {
if ($processedrecords == $maxrecords) {
notify($maxrecords.' records processed. Migration Process halted');
print_continue('utfdbmigrate.php?confirm=1&maxrecords='.$maxrecords.'&sesskey='.sesskey());
print_footer();
die();
}
}
$processedrecords++;
//print some output once in a while
if (($processedrecords) % 5000 == 0) {
echo '...'.$dbtablename.'...'.$fieldname.'...'.$record->id;
}
}
}else {
if ($debug) {
notify('no records found!');
}
}
} //close the while loop
/********************
* Drop index here **
********************/
if ($CFG->dbtype == 'mysql') {
if ($dropindex){ //drop index if index is varchar, text etc type
$SQL = 'ALTER TABLE '.$CFG->prefix.$dbtablename.' DROP INDEX '.$dropindex.';';
if ($debug) {
$db->debug=999;
}
execute_sql($SQL, $debug);
if ($debug) {
$db->debug=0;
}
} else if ($dropprimary) { //drop primary key
$SQL = 'ALTER TABLE '.$CFG->prefix.$dbtablename.' DROP PRIMARY KEY;';
if ($debug) {
$db->debug=999;
}
execute_sql($SQL, $debug);
if ($debug) {
$db->debug=0;
}
}
//BLOB TIME!
$SQL = 'ALTER TABLE '.$CFG->prefix.$dbtablename.' CHANGE '.$fieldname.' '.$fieldname.' BLOB;';
if ($fieldname != 'dummy') {
if ($debug) {
$db->debug=999;
}
execute_sql($SQL, $debug);
if ($debug) {
$db->debug=0;
}
}
/*********************************
* Change column encoding 2 phase*
*********************************/
$SQL = 'ALTER TABLE '.$CFG->prefix.$dbtablename;
$SQL.= ' CHANGE '.$fieldname.' '.$fieldname.' '.$type;
if ($length > 0) {
$SQL.='('.$length.') ';
}
$SQL .= ' NOT NULL DEFAULT '.$default.';';
if ($debug) {
$db->debug=999;
}
if ($fieldname != 'dummy') {
execute_sql($SQL, $debug);
}
if ($debug) {
$db->debug=0;
}
//phase 2
$SQL = 'ALTER TABLE '.$CFG->prefix.$dbtablename;
$SQL.= ' CHANGE '.$fieldname.' '.$fieldname.' '.$type;
if ($length > 0) {
$SQL.='('.$length.') ';
}
$SQL.=' CHARACTER SET utf8 NOT NULL DEFAULT '.$default.';';
if ($debug) {
$db->debug=999;
}
if ($fieldname != 'dummy') {
execute_sql($SQL, $debug);
}
if ($debug) {
$db->debug=0;
}
/********************************************
* build an array to add index back together*
********************************************/
if ($addindex){
$addindexarray[] = $addindex;
} else if ($adduniqueindex) {
$adduniqueindexarray[] = $adduniqueindex;
} else if ($addprimary) {
$addprimaryarray[] = $addprimary;
}
} else {
//posgresql code here
//No we don't need to do anything here
}
}
/********************************
* Adding the index back *
********************************/
$alter = 0;
if ($CFG->dbtype=='mysql'){
$SQL = 'ALTER TABLE '.$CFG->prefix.$dbtablename;
if (!empty($addindexarray)) {
foreach ($addindexarray as $aidx){
$SQL .= ' ADD INDEX '.$aidx.',';
$alter++;
}
}
if (!empty($adduniqueindexarray)) {
foreach ($adduniqueindexarray as $auidx){
$SQL .= ' ADD UNIQUE INDEX '.$auidx.',';
$alter++;
}
}
if (!empty($addprimaryarray)) {
foreach ($addprimaryarray as $apm){
$SQL .= ' ADD PRIMARY KEY '.$apm.',';
$alter++;
}
}
$SQL = rtrim($SQL, ', ');
$SQL.=';';
} else {
///posgresql code here
///No we don't need to do anything here
}
if ($alter) {
if ($debug) {
$db->debug=999;
}
execute_sql($SQL, $debug);
if ($debug) {
$db->debug=0;
}
}
} //if there are fields
/************************************
* now we modify the table encoding *
************************************/
if ($CFG->dbtype=='mysql'){
$SQL = 'ALTER TABLE '.$CFG->prefix.$dbtablename.' CHARACTER SET utf8';
if ($debug) {
$db->debug=999;
}
execute_sql($SQL, $debug);
if ($debug) {
$db->debug=0;
}
} else {
///posgresql code here
///No we don't need to do anything here
}
}
}
if ($CFG->dbtype=='mysql') {
/*********************************
* now we modify the db encoding *
*********************************/
$SQL = 'ALTER DATABASE '.$CFG->dbname.' CHARACTER SET utf8';
execute_sql($SQL, $debug);
} else {
if (!is_postgres_utf8()) {
//This old database is now deprecated
set_config('migrated_to_new_db','1');
}
}
delete_records('config','name','dbmigration'); //bye bye
//These have to go!
if ($debug) {
$db->debug=999;
}
if ($CFG->dbtype == 'postgres7') {
$backup_db = $GLOBALS['db'];
$GLOBALS['db'] = &get_postgres_db();
}
execute_sql('TRUNCATE TABLE '.$CFG->prefix.'cache_text', $debug);
execute_sql('TRUNCATE TABLE '.$CFG->prefix.'cache_filters', $debug);
if ($CFG->dbtype == 'postgres7') {
$GLOBALS['db'] = $backup_db;
unset($backup_db);
}
if ($debug) {
$db->debug=0;
}
//update site language
$sitelanguage = get_record('config','name', 'lang');
if (strstr($sitelanguage->value, 'utf8')===false and $sitelanguage->value) {
$sitelanguage->value.='_utf8';
migrate2utf8_update_record('config',$sitelanguage);
}
//finish the javascript bar
$done=159;
print_progress($done, 158, 5, 1);
//prints the list of langs used in this site
print_simple_box_start('center','50%');
echo '<div align="center">The following Language Packs are needed for your users and courses. Please install the following Language Packs:<br><b>';
$langsused = get_record('config','name', 'langsused');
$langs = explode (',',$langsused->value);
foreach ($langs as $lang) {
if (!empty($lang) and $lang != 'en_utf8') {
echo $lang.',';
}
}
echo '</b></div>';
print_simple_box_end();
delete_records('config','name','langsused');
//remove the cache file!
@unlink($CFG->dataroot.'/cache/languages');
//set the final flag
migrate2utf8_set_config('unicodedb','true'); //this is the main flag for unicode db
}
/* returns the course lang
* @param int courseid
* @return string
*/
function get_course_lang($courseid) {
static $coursecache;
if (!isset($coursecache[$courseid])) {
if ($course = get_record('course','id',$courseid)){
$coursecache[$courseid] = $course->lang;
return $course->lang;
}
return false;
} else {
return $coursecache[$courseid];
}
}
/* returns the teacher's lang
* @param int courseid
* @return string
*/
function get_main_teacher_lang($courseid) {
//editting teacher > non editting teacher
global $CFG;
static $mainteachercache;
if (!isset($mainteachercache[$courseid])) {
$SQL = 'SELECT u.lang from '.$CFG->prefix.'user_teachers ut,
'.$CFG->prefix.'course c,
'.$CFG->prefix.'user u WHERE
c.id = ut.course AND ut.course = '.$courseid.' AND u.id = ut.userid ORDER BY ut.authority ASC';
if ($teacher = get_record_sql($SQL, true)) {
$mainteachercache[$courseid] = $teacher->lang;
return $teacher->lang;
}
} else {
return $mainteachercache[$courseid];
}
}
function get_original_encoding($sitelang, $courselang, $userlang){
global $CFG;
$lang = '';
if ($courselang) {
$lang = $courselang;
}
else if ($userlang) {
$lang = $userlang;
}
else if ($sitelang) {
$lang = $sitelang;
}
else {
error ('no language found!');
}
$enc = array('af' => 'iso-8859-1', 'ar' => 'windows-1256', 'be' => 'windows-1251', 'bg' => 'windows-1251', 'bs' => 'windows-1250', 'cs' => 'iso-8859-2', 'da' => 'iso-8859-1', 'de' => 'iso-8859-1', 'de_du' => 'iso-8859-1', 'de_utf8' => 'utf-8', 'el' => 'windows-1253', 'en' => 'iso-8859-1', 'en_ja' => 'euc-jp', 'en_us' => 'iso-8859-1', 'en_utf8' => 'utf-8', 'es' => 'iso-8859-1', 'es_ar' => 'iso-8859-1', 'es_es' => 'iso-8859-1', 'es_mx' => 'iso-8859-1', 'et' => 'iso-8859-1', 'eu' => 'iso-8859-1', 'fa' => 'windows-1256', 'fa_utf8' => 'utf-8', 'fi' => 'iso-8859-1', 'fil' => 'iso-8859-15', 'fr' => 'iso-8859-1', 'fr_ca' => 'iso-8859-15', 'ga' => 'iso-8859-1', 'gl' => 'iso-8859-1', 'he' => 'ISO-8859-8-I', 'he_utf8' => 'utf-8', 'hi' => 'iso-8859-1', 'hr' => 'windows-1250', 'hr_utf8' => 'utf-8', 'hu' => 'iso-8859-2', 'id' => 'iso-8859-1', 'it' => 'iso-8859-1', 'ja' => 'EUC-JP', 'ja_utf8' => 'UTF-8', 'ka_utf8' => 'UTF-8', 'km_utf8' => 'UTF-8', 'kn_utf8' => 'utf-8', 'ko' => 'EUC-KR', 'ko_utf8' => 'UTF-8', 'lt' => 'windows-1257', 'lv' => 'ISO-8859-4', 'mi_nt' => 'iso-8859-1', 'mi_tn_utf8' => 'utf-8', 'ms' => 'iso-8859-1', 'nl' => 'iso-8859-1', 'nn' => 'iso-8859-1', 'no' => 'iso-8859-1', 'no_gr' => 'iso-8859-1', 'pl' => 'iso-8859-2', 'pt' => 'iso-8859-1', 'pt_br' => 'iso-8859-1', 'ro' => 'iso-8859-2', 'ru' => 'windows-1251', 'sk' => 'iso-8859-2', 'sl' => 'iso-8859-2', 'sl_utf8' => 'utf-8', 'so' => 'iso-8859-1', 'sq' => 'iso-8859-1', 'sr_utf8' => 'utf-8', 'sv' => 'iso-8859-1', 'th' => 'TIS-620', 'th_utf8' => 'UTF-8', 'tl' => 'iso-8859-15', 'tl_utf8' => 'UTF-8', 'tr' => 'iso-8859-9', 'uk' => 'windows-1251', 'vi_utf8' => 'UTF-8', 'zh_cn' => 'GB18030', 'zh_cn_utf8' => 'UTF-8', 'zh_tw' => 'Big5', 'zh_tw_utf8' => 'UTF-8');
if ($enc[$lang]) {
return $enc[$lang];
} else {
notify ('unknown language detected: '.$lang);
return false;
}
}
/* returns the user's lang
* @param int userid
* @return string
*/
function get_user_lang($userid) {
static $usercache;
if (!isset($usercache[$userid])) {
if ($user = get_record('user','id',$userid)) {
$usercache[$userid] = $user->lang;
return $user->lang;
}
} else {
return $usercache[$userid];
}
return false;
}
// a placeholder for now
function log_the_problem_somewhere() { //Eloy: Nice function, perhaps we could use it, perhpas no. :-)
global $CFG;
if ($CFG->debug>7) {
echo "<br />Problem converting: $dbtablename -> $fieldname -> $recordid!";
}
}
//only this function should be used during db migraton, because of addslashes at the end of the convertion
function utfconvert($string, $enc) {
global $textlib;
if ($result = $textlib->convert($string, $enc)) {
$result = addslashes($result);
}
return $result;
}
function validate_form(&$form, &$err) {
global $CFG;
$newdb = &ADONewConnection('postgres7');
error_reporting(0); // Hide errors
$dbconnected = $newdb->Connect($form->dbhost,$form->dbuser,$form->dbpass,$form->dbname);
error_reporting($CFG->debug); // Show errors
if (!$dbconnected) {
$err['dbconnect'] = get_string('dbmigrateconnecerror', 'admin');
return;
}
if (!is_postgres_utf8($newdb)) {
$err['dbconnect'] = get_string('dbmigrateencodingerror', 'admin', $encoding);
return;
}
return;
}
function is_postgres_utf8($thedb = null) {
if ($thedb === null) {
$thedb = &$GLOBALS['db'];
}
$db_encoding_postgres = $thedb->GetOne('SHOW server_encoding');
if (strtoupper($db_encoding_postgres) == 'UNICODE' || strtoupper($db_encoding_postgres) == 'UTF8') {
return true;
} else {
return false;
}
}
function &get_postgres_db() {
static $postgres_db;
if (!$postgres_db) {
if (is_postgres_utf8()) {
$postgres_db = &$GLOBALS['db'];
} else {
$postgres_db = &ADONewConnection('postgres7');
$postgres_db->Connect($_SESSION['newpostgresdb']->dbhost,$_SESSION['newpostgresdb']->dbuser,$_SESSION['newpostgresdb']->dbpass,$_SESSION['newpostgresdb']->dbname);
}
}
return $postgres_db;
}
function is_postgres_setup() {
$postgres_db = &get_postgres_db();
return $GLOBALS['db']->MetaTables() == $postgres_db->MetaTables();
}
function migrate2utf8_update_record($table,$record) {
global $CFG;
if ($CFG->dbtype == 'mysql') {
update_record($table,$record);
} else {
$backup_db = $GLOBALS['db'];
$GLOBALS['db'] = &get_postgres_db();
global $in;
$in = true;
update_record($table,$record);
$GLOBALS['db'] = $backup_db;
}
}
function migrate2utf8_set_config($name, $value, $plugin=NULL) {
if ($CFG->dbtype == 'mysql') {
set_config($name, $value, $plugin);
} else {
$backup_db = $GLOBALS['db'];
$GLOBALS['db'] = &get_postgres_db();
set_config($name, $value, $plugin);
$GLOBALS['db'] = $backup_db;
}
}
function utf_get_xml () {
global $CFG;
$xmls = array();
/*****************************************************************************
* traverse order is mod->backup->block->block_plugin->enroll_plugin->global *
*****************************************************************************/
///mod
if (!$mods = get_list_of_plugins('mod')) {
error('No modules installed!');
}
foreach ($mods as $mod){
if (file_exists($CFG->dirroot.'/mod/'.$mod.'/db/migrate2utf8.xml')) {
$xmls[] = xmlize(file_get_contents($CFG->dirroot.'/mod/'.$mod.'/db/migrate2utf8.xml'));
}
}
///Backups
$xmls[] = xmlize(file_get_contents($CFG->dirroot.'/backup/db/migrate2utf8.xml'));
///Blocks
$xmls[] = xmlize(file_get_contents($CFG->dirroot.'/blocks/db/migrate2utf8.xml'));
///Block Plugins
if (!$blocks = get_list_of_plugins('blocks')) {
//error('No blocks installed!'); //Eloy: Is this a cause to stop?
}
foreach ($blocks as $block){
if (file_exists($CFG->dirroot.'/blocks/'.$block.'/db/migrate2utf8.xml')) {
$xmls[] = xmlize(file_get_contents($CFG->dirroot.'/blocks/'.$block.'/db/migrate2utf8.xml'));
}
}
///Enrol
if (!$enrols = get_list_of_plugins('enrol')) {
//error('No enrol installed!'); //Eloy: enrol, not blocks :-) Is this a cause to stop?
}
foreach ($enrols as $enrol){
if (file_exists($CFG->dirroot.'/enrol/'.$enrol.'/db/migrate2utf8.xml')) {
$xmls[] = xmlize(file_get_contents($CFG->dirroot.'/enrol/'.$enrol.'/db/migrate2utf8.xml'));
}
}
///Lastly, globals
$xmls[] = xmlize(file_get_contents($CFG->dirroot.'/lib/db/migrate2utf8.xml'));
return $xmls;
}