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<?php //$Id: restorelib.php,v 1.16 2006/04/11 16:13:50 stronk7 Exp $
//This php script contains all the stuff to backup/restore
//chat mods
//This is the "graphical" structure of the chat mod:
//
// chat
// (CL,pk->id)
// |
// |
// |
// chat_messages
// (UL,pk->id, fk->chatid)
//
// Meaning: pk->primary key field of the table
// fk->foreign key to link with parent
// nt->nested field (recursive data)
// CL->course level info
// UL->user level info
// files->table may have files)
//
//-----------------------------------------------------------
//This function executes all the restore procedure about this mod
function chat_restore_mods($mod,$restore) {
global $CFG;
$status = true;
//Get record from backup_ids
$data = backup_getid($restore->backup_unique_code,$mod->modtype,$mod->id);
if ($data) {
//Now get completed xmlized object
$info = $data->info;
//traverse_xmlize($info); //Debug
//print_object ($GLOBALS['traverse_array']); //Debug
//$GLOBALS['traverse_array']=""; //Debug
//Now, build the CHAT record structure
$chat->course = $restore->course_id;
$chat->name = backup_todb($info['MOD']['#']['NAME']['0']['#']);
$chat->intro = backup_todb($info['MOD']['#']['INTRO']['0']['#']);
$chat->keepdays = backup_todb($info['MOD']['#']['KEEPDAYS']['0']['#']);
$chat->studentlogs = backup_todb($info['MOD']['#']['STUDENTLOGS']['0']['#']);
$chat->schedule = backup_todb($info['MOD']['#']['SCHEDULE']['0']['#']);
$chat->chattime = backup_todb($info['MOD']['#']['CHATTIME']['0']['#']);
$chat->timemodified = backup_todb($info['MOD']['#']['TIMEMODIFIED']['0']['#']);
//The structure is equal to the db, so insert the chat
$newid = insert_record ("chat",$chat);
//Do some output
if (!defined('RESTORE_SILENTLY')) {
echo "<li>".get_string("modulename","chat")." \"".format_string(stripslashes($chat->name),true)."\"</li>";
}
backup_flush(300);
if ($newid) {
//We have the newid, update backup_ids
backup_putid($restore->backup_unique_code,$mod->modtype,
$mod->id, $newid);
//Now check if want to restore user data and do it.
if (restore_userdata_selected($restore,'chat',$mod->id)) {
//Restore chat_messages
$status = chat_messages_restore_mods ($mod->id, $newid,$info,$restore);
}
} else {
$status = false;
}
} else {
$status = false;
}
return $status;
}
//This function restores the chat_messages
function chat_messages_restore_mods($old_chat_id, $new_chat_id,$info,$restore) {
global $CFG;
$status = true;
//Get the messages array
$messages = $info['MOD']['#']['MESSAGES']['0']['#']['MESSAGE'];
//Iterate over messages
for($i = 0; $i < sizeof($messages); $i++) {
$mes_info = $messages[$i];
//traverse_xmlize($mes_info); //Debug
//print_object ($GLOBALS['traverse_array']); //Debug
//$GLOBALS['traverse_array']=""; //Debug
//We'll need this later!!
$oldid = backup_todb($mes_info['#']['ID']['0']['#']);
$olduserid = backup_todb($mes_info['#']['USERID']['0']['#']);
//Now, build the CHAT_MESSAGES record structure
$message->chatid = $new_chat_id;
$message->userid = backup_todb($mes_info['#']['USERID']['0']['#']);
$message->groupid = backup_todb($mes_info['#']['GROUPID']['0']['#']);
$message->system = backup_todb($mes_info['#']['SYSTEM']['0']['#']);
$message->message = backup_todb($mes_info['#']['MESSAGE_TEXT']['0']['#']);
$message->timestamp = backup_todb($mes_info['#']['TIMESTAMP']['0']['#']);
//We have to recode the userid field
$user = backup_getid($restore->backup_unique_code,"user",$message->userid);
if ($user) {
$message->userid = $user->new_id;
}
//We have to recode the groupid field
$group = backup_getid($restore->backup_unique_code,"group",$message->groupid);
if ($group) {
$message->groupid = $group->new_id;
}
//The structure is equal to the db, so insert the chat_message
$newid = insert_record ("chat_messages",$message);
//Do some output
if (($i+1) % 50 == 0) {
if (!defined('RESTORE_SILENTLY')) {
echo ".";
if (($i+1) % 1000 == 0) {
echo "<br />";
}
}
backup_flush(300);
}
}
return $status;
}
//Return a content decoded to support interactivities linking. Every module
//should have its own. They are called automatically from
//chat_decode_content_links_caller() function in each module
//in the restore process
function chat_decode_content_links ($content,$restore) {
global $CFG;
$result = $content;
//Link to the list of chats
$searchstring='/\$@(CHATINDEX)\*([0-9]+)@\$/';
//We look for it
preg_match_all($searchstring,$content,$foundset);
//If found, then we are going to look for its new id (in backup tables)
if ($foundset[0]) {
//print_object($foundset); //Debug
//Iterate over foundset[2]. They are the old_ids
foreach($foundset[2] as $old_id) {
//We get the needed variables here (course id)
$rec = backup_getid($restore->backup_unique_code,"course",$old_id);
//Personalize the searchstring
$searchstring='/\$@(CHATINDEX)\*('.$old_id.')@\$/';
//If it is a link to this course, update the link to its new location
if($rec->new_id) {
//Now replace it
$result= preg_replace($searchstring,$CFG->wwwroot.'/mod/chat/index.php?id='.$rec->new_id,$result);
} else {
//It's a foreign link so leave it as original
$result= preg_replace($searchstring,$restore->original_wwwroot.'/mod/chat/index.php?id='.$old_id,$result);
}
}
}
//Link to chat view by moduleid
$searchstring='/\$@(CHATVIEWBYID)\*([0-9]+)@\$/';
//We look for it
preg_match_all($searchstring,$result,$foundset);
//If found, then we are going to look for its new id (in backup tables)
if ($foundset[0]) {
//print_object($foundset); //Debug
//Iterate over foundset[2]. They are the old_ids
foreach($foundset[2] as $old_id) {
//We get the needed variables here (course_modules id)
$rec = backup_getid($restore->backup_unique_code,"course_modules",$old_id);
//Personalize the searchstring
$searchstring='/\$@(CHATVIEWBYID)\*('.$old_id.')@\$/';
//If it is a link to this course, update the link to its new location
if($rec->new_id) {
//Now replace it
$result= preg_replace($searchstring,$CFG->wwwroot.'/mod/chat/view.php?id='.$rec->new_id,$result);
} else {
//It's a foreign link so leave it as original
$result= preg_replace($searchstring,$restore->original_wwwroot.'/mod/chat/view.php?id='.$old_id,$result);
}
}
}
return $result;
}
//This function makes all the necessary calls to xxxx_decode_content_links()
//function in each module, passing them the desired contents to be decoded
//from backup format to destination site/course in order to mantain inter-activities
//working in the backup/restore process. It's called from restore_decode_content_links()
//function in restore process
function chat_decode_content_links_caller($restore) {
global $CFG;
$status = true;
if ($chats = get_records_sql ("SELECT c.id, c.intro
FROM {$CFG->prefix}chat c
WHERE c.course = $restore->course_id")) {
//Iterate over each chat->intro
$i = 0; //Counter to send some output to the browser to avoid timeouts
foreach ($chats as $chat) {
//Increment counter
$i++;
$content = $chat->intro;
$result = restore_decode_content_links_worker($content,$restore);
if ($result != $content) {
//Update record
$chat->intro = addslashes($result);
$status = update_record("chat",$chat);
if ($CFG->debug>7) {
if (!defined('RESTORE_SILENTLY')) {
echo '<br /><hr />'.s($content).'<br />changed to<br />'.s($result).'<hr /><br />';
}
}
}
//Do some output
if (($i+1) % 5 == 0) {
if (!defined('RESTORE_SILENTLY')) {
echo ".";
if (($i+1) % 100 == 0) {
echo "<br />";
}
}
backup_flush(300);
}
}
}
return $status;
}
//This function returns a log record with all the necessay transformations
//done. It's used by restore_log_module() to restore modules log.
function chat_restore_logs($restore,$log) {
$status = false;
//Depending of the action, we recode different things
switch ($log->action) {
case "add":
if ($log->cmid) {
//Get the new_id of the module (to recode the info field)
$mod = backup_getid($restore->backup_unique_code,$log->module,$log->info);
if ($mod) {
$log->url = "view.php?id=".$log->cmid;
$log->info = $mod->new_id;
$status = true;
}
}
break;
case "update":
if ($log->cmid) {
//Get the new_id of the module (to recode the info field)
$mod = backup_getid($restore->backup_unique_code,$log->module,$log->info);
if ($mod) {
$log->url = "view.php?id=".$log->cmid;
$log->info = $mod->new_id;
$status = true;
}
}
break;
case "talk":
if ($log->cmid) {
//Get the new_id of the module (to recode the info field)
$mod = backup_getid($restore->backup_unique_code,$log->module,$log->info);
if ($mod) {
$log->url = "view.php?id=".$log->cmid;
$log->info = $mod->new_id;
$status = true;
}
}
break;
case "view":
if ($log->cmid) {
//Get the new_id of the module (to recode the info field)
$mod = backup_getid($restore->backup_unique_code,$log->module,$log->info);
if ($mod) {
$log->url = "view.php?id=".$log->cmid;
$log->info = $mod->new_id;
$status = true;
}
}
break;
case "view all":
$log->url = "index.php?id=".$log->course;
$status = true;
break;
case "report":
if ($log->cmid) {
//Get the new_id of the module (to recode the info field)
$mod = backup_getid($restore->backup_unique_code,$log->module,$log->info);
if ($mod) {
$log->url = "report.php?id=".$log->cmid;
$log->info = $mod->new_id;
$status = true;
}
}
break;
default:
if (!defined('RESTORE_SILENTLY')) {
echo "action (".$log->module."-".$log->action.") unknown. Not restored<br />"; //Debug
}
break;
}
if ($status) {
$status = $log;
}
return $status;
}
?>
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