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25ef0370d5
Complete refactoring of the system that was really awful (my fault!). Now everything is in its place and working like a charm, making things really easier to be implemented and amplied. Bug 3678 (http://moodle.org/bugs/bug.php?op=show&bugid=3678) (http://moodle.org/mod/forum/discuss.php?d=26530) Note: Everything is merged from stable but the quiz module because it has other changes not merged for now. I've skyped a message to Gustav about it. Merged from MOODLE_15_STABLE
304 lines
12 KiB
PHP
304 lines
12 KiB
PHP
<?php //$Id$
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//This php script contains all the stuff to backup/restore
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//chat mods
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//This is the "graphical" structure of the chat mod:
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//
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// chat
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// (CL,pk->id)
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// |
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// |
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// |
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// chat_messages
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// (UL,pk->id, fk->chatid)
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//
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// Meaning: pk->primary key field of the table
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// fk->foreign key to link with parent
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// nt->nested field (recursive data)
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// CL->course level info
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// UL->user level info
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// files->table may have files)
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//
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//-----------------------------------------------------------
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//This function executes all the restore procedure about this mod
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function chat_restore_mods($mod,$restore) {
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global $CFG;
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$status = true;
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//Get record from backup_ids
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$data = backup_getid($restore->backup_unique_code,$mod->modtype,$mod->id);
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if ($data) {
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//Now get completed xmlized object
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$info = $data->info;
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//traverse_xmlize($info); //Debug
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//print_object ($GLOBALS['traverse_array']); //Debug
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//$GLOBALS['traverse_array']=""; //Debug
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//Now, build the CHAT record structure
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$chat->course = $restore->course_id;
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$chat->name = backup_todb($info['MOD']['#']['NAME']['0']['#']);
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$chat->intro = backup_todb($info['MOD']['#']['INTRO']['0']['#']);
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$chat->keepdays = backup_todb($info['MOD']['#']['KEEPDAYS']['0']['#']);
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$chat->studentlogs = backup_todb($info['MOD']['#']['STUDENTLOGS']['0']['#']);
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$chat->schedule = backup_todb($info['MOD']['#']['SCHEDULE']['0']['#']);
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$chat->chattime = backup_todb($info['MOD']['#']['CHATTIME']['0']['#']);
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$chat->timemodified = backup_todb($info['MOD']['#']['TIMEMODIFIED']['0']['#']);
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//The structure is equal to the db, so insert the chat
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$newid = insert_record ("chat",$chat);
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//Do some output
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echo "<li>".get_string("modulename","chat")." \"".format_string(stripslashes($chat->name),true)."\"</li>";
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backup_flush(300);
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if ($newid) {
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//We have the newid, update backup_ids
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backup_putid($restore->backup_unique_code,$mod->modtype,
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$mod->id, $newid);
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//Now check if want to restore user data and do it.
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if ($restore->mods['chat']->userinfo) {
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//Restore chat_messages
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$status = chat_messages_restore_mods ($mod->id, $newid,$info,$restore);
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}
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} else {
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$status = false;
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}
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} else {
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$status = false;
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}
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return $status;
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}
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//This function restores the chat_messages
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function chat_messages_restore_mods($old_chat_id, $new_chat_id,$info,$restore) {
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global $CFG;
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$status = true;
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//Get the messages array
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$messages = $info['MOD']['#']['MESSAGES']['0']['#']['MESSAGE'];
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//Iterate over messages
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for($i = 0; $i < sizeof($messages); $i++) {
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$mes_info = $messages[$i];
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//traverse_xmlize($mes_info); //Debug
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//print_object ($GLOBALS['traverse_array']); //Debug
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//$GLOBALS['traverse_array']=""; //Debug
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//We'll need this later!!
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$oldid = backup_todb($mes_info['#']['ID']['0']['#']);
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$olduserid = backup_todb($mes_info['#']['USERID']['0']['#']);
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//Now, build the CHAT_MESSAGES record structure
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$message->chatid = $new_chat_id;
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$message->userid = backup_todb($mes_info['#']['USERID']['0']['#']);
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$message->groupid = backup_todb($mes_info['#']['GROUPID']['0']['#']);
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$message->system = backup_todb($mes_info['#']['SYSTEM']['0']['#']);
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$message->message = backup_todb($mes_info['#']['MESSAGE_TEXT']['0']['#']);
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$message->timestamp = backup_todb($mes_info['#']['TIMESTAMP']['0']['#']);
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//We have to recode the userid field
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$user = backup_getid($restore->backup_unique_code,"user",$message->userid);
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if ($user) {
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$message->userid = $user->new_id;
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}
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//We have to recode the groupid field
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$group = backup_getid($restore->backup_unique_code,"group",$message->groupid);
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if ($group) {
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$message->groupid = $group->new_id;
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}
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//The structure is equal to the db, so insert the chat_message
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$newid = insert_record ("chat_messages",$message);
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//Do some output
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if (($i+1) % 50 == 0) {
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echo ".";
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if (($i+1) % 1000 == 0) {
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echo "<br />";
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}
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backup_flush(300);
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}
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}
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return $status;
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}
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//Return a content decoded to support interactivities linking. Every module
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//should have its own. They are called automatically from
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//chat_decode_content_links_caller() function in each module
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//in the restore process
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function chat_decode_content_links ($content,$restore) {
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global $CFG;
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$result = $content;
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//Link to the list of chats
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$searchstring='/\$@(CHATINDEX)\*([0-9]+)@\$/';
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//We look for it
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preg_match_all($searchstring,$content,$foundset);
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//If found, then we are going to look for its new id (in backup tables)
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if ($foundset[0]) {
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//print_object($foundset); //Debug
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//Iterate over foundset[2]. They are the old_ids
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foreach($foundset[2] as $old_id) {
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//We get the needed variables here (course id)
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$rec = backup_getid($restore->backup_unique_code,"course",$old_id);
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//Personalize the searchstring
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$searchstring='/\$@(CHATINDEX)\*('.$old_id.')@\$/';
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//If it is a link to this course, update the link to its new location
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if($rec->new_id) {
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//Now replace it
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$result= preg_replace($searchstring,$CFG->wwwroot.'/mod/chat/index.php?id='.$rec->new_id,$result);
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} else {
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//It's a foreign link so leave it as original
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$result= preg_replace($searchstring,$restore->original_wwwroot.'/mod/chat/index.php?id='.$old_id,$result);
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}
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}
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}
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//Link to chat view by moduleid
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$searchstring='/\$@(CHATVIEWBYID)\*([0-9]+)@\$/';
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//We look for it
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preg_match_all($searchstring,$result,$foundset);
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//If found, then we are going to look for its new id (in backup tables)
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if ($foundset[0]) {
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//print_object($foundset); //Debug
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//Iterate over foundset[2]. They are the old_ids
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foreach($foundset[2] as $old_id) {
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//We get the needed variables here (course_modules id)
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$rec = backup_getid($restore->backup_unique_code,"course_modules",$old_id);
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//Personalize the searchstring
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$searchstring='/\$@(CHATVIEWBYID)\*('.$old_id.')@\$/';
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//If it is a link to this course, update the link to its new location
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if($rec->new_id) {
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//Now replace it
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$result= preg_replace($searchstring,$CFG->wwwroot.'/mod/chat/view.php?id='.$rec->new_id,$result);
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} else {
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//It's a foreign link so leave it as original
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$result= preg_replace($searchstring,$restore->original_wwwroot.'/mod/chat/view.php?id='.$old_id,$result);
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}
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}
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}
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return $result;
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}
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//This function makes all the necessary calls to xxxx_decode_content_links()
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//function in each module, passing them the desired contents to be decoded
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//from backup format to destination site/course in order to mantain inter-activities
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//working in the backup/restore process. It's called from restore_decode_content_links()
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//function in restore process
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function chat_decode_content_links_caller($restore) {
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global $CFG;
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$status = true;
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if ($chats = get_records_sql ("SELECT c.id, c.intro
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FROM {$CFG->prefix}chat c
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WHERE c.course = $restore->course_id")) {
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//Iterate over each chat->intro
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$i = 0; //Counter to send some output to the browser to avoid timeouts
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foreach ($chats as $chat) {
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//Increment counter
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$i++;
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$content = $chat->intro;
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$result = restore_decode_content_links_worker($content,$restore);
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if ($result != $content) {
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//Update record
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$chat->intro = addslashes($result);
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$status = update_record("chat",$chat);
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if ($CFG->debug>7) {
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echo "<br /><hr />".$content."<br />changed to</br>".$result."<hr /><br />";
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}
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}
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//Do some output
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if (($i+1) % 5 == 0) {
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echo ".";
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if (($i+1) % 100 == 0) {
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echo "<br />";
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}
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backup_flush(300);
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}
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}
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}
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return $status;
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}
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//This function returns a log record with all the necessay transformations
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//done. It's used by restore_log_module() to restore modules log.
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function chat_restore_logs($restore,$log) {
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$status = false;
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//Depending of the action, we recode different things
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switch ($log->action) {
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case "add":
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if ($log->cmid) {
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//Get the new_id of the module (to recode the info field)
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$mod = backup_getid($restore->backup_unique_code,$log->module,$log->info);
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if ($mod) {
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$log->url = "view.php?id=".$log->cmid;
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$log->info = $mod->new_id;
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$status = true;
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}
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}
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break;
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case "update":
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if ($log->cmid) {
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//Get the new_id of the module (to recode the info field)
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$mod = backup_getid($restore->backup_unique_code,$log->module,$log->info);
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if ($mod) {
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$log->url = "view.php?id=".$log->cmid;
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$log->info = $mod->new_id;
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$status = true;
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}
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}
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break;
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case "view":
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if ($log->cmid) {
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//Get the new_id of the module (to recode the info field)
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$mod = backup_getid($restore->backup_unique_code,$log->module,$log->info);
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if ($mod) {
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$log->url = "view.php?id=".$log->cmid;
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$log->info = $mod->new_id;
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$status = true;
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}
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}
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break;
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case "view all":
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$log->url = "index.php?id=".$log->course;
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$status = true;
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break;
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case "report":
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if ($log->cmid) {
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//Get the new_id of the module (to recode the info field)
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$mod = backup_getid($restore->backup_unique_code,$log->module,$log->info);
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if ($mod) {
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$log->url = "report.php?id=".$log->cmid;
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$log->info = $mod->new_id;
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$status = true;
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}
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}
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break;
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default:
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echo "action (".$log->module."-".$log->action.") unknow. Not restored<br />"; //Debug
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break;
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}
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if ($status) {
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$status = $log;
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}
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return $status;
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}
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?>
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