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|
<?php //$Id: restorelib.php,v 1.13.2.3 2006/08/18 21:21:59 tjhunt Exp $
//This php script contains all the stuff to restore questions
// Todo:
// the restoration of the parent and sortorder fields in the category table needs
// a lot more thought. We should probably use a library function to add the category
// rather than just writing it to the database
// whereever it says "/// We have to recode the .... field" we should put in a check
// to see if the recoding was successful and throw an appropriate error otherwise
//This is the "graphical" structure of the question database:
//To see, put your terminal to 160cc
// The following holds student-independent information about the questions
//
// question_categories
// (CL,pk->id)
// |
// |
// |.......................................
// | .
// | .
// | -------question_datasets------ .
// | | (CL,pk->id,fk->question, | .
// | | fk->dataset_definition) | .
// | | | .
// | | | .
// | | | .
// | | question_dataset_definitions
// | | (CL,pk->id,fk->category)
// question |
// (CL,pk->id,fk->category,files) |
// | question_dataset_items
// | (CL,pk->id,fk->definition)
// | question_rqp_type
// | (SL,pk->id)
// | |
// -------------------------------------------------------------------------------------------------------------- |
// | | | | | | | question_rqp
// | | | | | | |--(CL,pk->id,fk->question)
// | | | | question_calculated | |
// question_truefalse | question_multichoice | (CL,pl->id,fk->question) | |
// (CL,pk->id,fk->question) | (CL,pk->id,fk->question) | . | | question_randomsamatch
// . | . | . | |--(CL,pk->id,fk->question)
// . question_shortanswer . question_numerical . question_multianswer. |
// . (CL,pk->id,fk->question) . (CL,pk->id,fk->question) . (CL,pk->id,fk->question) |
// . . . . . . | question_match
// . . . . . . |--(CL,pk->id,fk->question)
// . . . . . . | .
// . . . . . . | .
// . . . . . . | .
// . . . . . . | question_match_sub
// ........................................................................................ |--(CL,pk->id,fk->question)
// . |
// . |
// . | question_numerical_units
// question_answers |--(CL,pk->id,fk->question)
// (CL,pk->id,fk->question)----------------------------------------------------------
//
//
// The following holds the information about student interaction with the questions
//
// question_sessions
// (UL,pk->id,fk->attempt,question)
// .
// .
// question_states
// (UL,pk->id,fk->attempt,question)
// |
// question_rqp_states
// (UL,pk->id,fk->stateid)
//
// Meaning: pk->primary key field of the table
// fk->foreign key to link with parent
// nt->nested field (recursive data)
// SL->site level info
// CL->course level info
// UL->user level info
// files->table may have files
//
//-----------------------------------------------------------
include_once($CFG->libdir.'/questionlib.php');
function restore_question_categories($category,$restore) {
global $CFG;
$status = true;
//Hook to call Moodle < 1.5 Quiz Restore
if ($restore->backup_version < 2005043000) {
include_once($CFG->dirroot.'/mod/quiz/restorelibpre15.php');
return quiz_restore_pre15_question_categories($category,$restore);
}
//Get record from backup_ids
$data = backup_getid($restore->backup_unique_code,"question_categories",$category->id);
if ($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 question_categories record structure
$question_cat = new stdClass;
$question_cat->course = $restore->course_id;
$question_cat->name = backup_todb($info['QUESTION_CATEGORY']['#']['NAME']['0']['#']);
$question_cat->info = backup_todb($info['QUESTION_CATEGORY']['#']['INFO']['0']['#']);
$question_cat->publish = backup_todb($info['QUESTION_CATEGORY']['#']['PUBLISH']['0']['#']);
$question_cat->stamp = backup_todb($info['QUESTION_CATEGORY']['#']['STAMP']['0']['#']);
$question_cat->parent = backup_todb($info['QUESTION_CATEGORY']['#']['PARENT']['0']['#']);
$question_cat->sortorder = backup_todb($info['QUESTION_CATEGORY']['#']['SORTORDER']['0']['#']);
if ($catfound = restore_get_best_question_category($question_cat, $restore->course_id)) {
$newid = $catfound;
} else {
if (!$question_cat->stamp) {
$question_cat->stamp = make_unique_id_code();
}
$newid = insert_record ("question_categories",$question_cat);
}
//Do some output
if ($newid) {
if (!defined('RESTORE_SILENTLY')) {
echo "<li>".get_string('category', 'quiz')." \"".$question_cat->name."\"<br />";
}
} else {
//We must never arrive here !!
if (!defined('RESTORE_SILENTLY')) {
echo "<li>".get_string('category', 'quiz')." \"".$question_cat->name."\" Error!<br />";
}
$status = false;
}
backup_flush(300);
//Here category has been created or selected, so save results in backup_ids and start with questions
if ($newid and $status) {
//We have the newid, update backup_ids
backup_putid($restore->backup_unique_code,"question_categories",
$category->id, $newid);
//Now restore question
$status = restore_questions ($category->id, $newid,$info,$restore);
} else {
$status = false;
}
if (!defined('RESTORE_SILENTLY')) {
echo '</li>';
}
} else {
echo 'Could not get backup info for question category'. $category->id;
}
return $status;
}
function restore_questions ($old_category_id,$new_category_id,$info,$restore) {
global $CFG, $QTYPES;
$status = true;
$restored_questions = array();
//Get the questions array
if (!empty($info['QUESTION_CATEGORY']['#']['QUESTIONS'])) {
$questions = $info['QUESTION_CATEGORY']['#']['QUESTIONS']['0']['#']['QUESTION'];
} else {
$questions = array();
}
//Iterate over questions
for($i = 0; $i < sizeof($questions); $i++) {
$que_info = $questions[$i];
//traverse_xmlize($que_info); //Debug
//print_object ($GLOBALS['traverse_array']); //Debug
//$GLOBALS['traverse_array']=""; //Debug
//We'll need this later!!
$oldid = backup_todb($que_info['#']['ID']['0']['#']);
//Now, build the question record structure
$question = new object;
$question->category = $new_category_id;
$question->parent = backup_todb($que_info['#']['PARENT']['0']['#']);
$question->name = backup_todb($que_info['#']['NAME']['0']['#']);
$question->questiontext = backup_todb($que_info['#']['QUESTIONTEXT']['0']['#']);
$question->questiontextformat = backup_todb($que_info['#']['QUESTIONTEXTFORMAT']['0']['#']);
$question->image = backup_todb($que_info['#']['IMAGE']['0']['#']);
$question->defaultgrade = backup_todb($que_info['#']['DEFAULTGRADE']['0']['#']);
$question->penalty = backup_todb($que_info['#']['PENALTY']['0']['#']);
$question->qtype = backup_todb($que_info['#']['QTYPE']['0']['#']);
$question->length = backup_todb($que_info['#']['LENGTH']['0']['#']);
$question->stamp = backup_todb($que_info['#']['STAMP']['0']['#']);
$question->version = backup_todb($que_info['#']['VERSION']['0']['#']);
$question->hidden = backup_todb($que_info['#']['HIDDEN']['0']['#']);
if ($restore->backup_version < 2006032200) {
// The qtype was an integer that now needs to be converted to the name
$qtypenames = array(1=>'shortanswer',2=>'truefalse',3=>'multichoice',4=>'random',5=>'match',
6=>'randomsamatch',7=>'description',8=>'numerical',9=>'multianswer',10=>'calculated',
11=>'rqp',12=>'essay');
$question->qtype = $qtypenames[$question->qtype];
}
//Check if the question exists
//by category, stamp, and version
$question_exists = get_record ("question","category",$question->category,
"stamp",$question->stamp,"version",$question->version);
//If the question exists, only record its id
if ($question_exists) {
$newid = $question_exists->id;
$creatingnewquestion = false;
//Else, create a new question
} else {
//The structure is equal to the db, so insert the question
$newid = insert_record ("question",$question);
$creatingnewquestion = true;
}
//Save newid to backup tables
if ($newid) {
//We have the newid, update backup_ids
backup_putid($restore->backup_unique_code,"question",$oldid,
$newid);
}
$restored_questions[$i] = new stdClass;
$restored_questions[$i]->newid = $newid;
$restored_questions[$i]->oldid = $oldid;
$restored_questions[$i]->qtype = $question->qtype;
$restored_questions[$i]->parent = $question->parent;
$restored_questions[$i]->is_new = $creatingnewquestion;
}
// Loop again, now all the question id mappings exist, so everything can
// be restored.
for($i = 0; $i < sizeof($questions); $i++) {
$que_info = $questions[$i];
$newid = $restored_questions[$i]->newid;
$oldid = $restored_questions[$i]->oldid;
$question = new object;
$question->qtype = $restored_questions[$i]->qtype;
$question->parent = $restored_questions[$i]->parent;
//If it's a new question in the DB, restore it
if ($restored_questions[$i]->is_new) {
////We have to recode the parent field
if ($question->parent) {
if ($parent = backup_getid($restore->backup_unique_code,"question",$question->parent)) {
$question->parent = $parent->new_id;
} elseif ($question->parent = $oldid) {
$question->parent = $newid;
} else {
echo 'Could not recode parent '.$question->parent.' for question '.$oldid.'<br />';
}
}
//Now, restore every question_answers in this question
$status = question_restore_answers($oldid,$newid,$que_info,$restore);
// Restore questiontype specific data
if (array_key_exists($question->qtype, $QTYPES)) {
$status = $QTYPES[$question->qtype]->restore($oldid,$newid,$que_info,$restore);
} else {
echo 'Unknown question type '.$question->qtype.' for question '.$oldid.'<br />';
$status = false;
}
} else {
//We are NOT creating the question, but we need to know every question_answers
//map between the XML file and the database to be able to restore the states
//in each attempt.
$status = question_restore_map_answers($oldid,$newid,$que_info,$restore);
// Do the questiontype specific mapping
if (array_key_exists($question->qtype, $QTYPES)) {
$status = $QTYPES[$question->qtype]->restore_map($oldid,$newid,$que_info,$restore);
} else {
echo 'Unknown question type '.$question->qtype.' for question '.$oldid.'<br />';
$status = false;
}
}
//Do some output
if (($i+1) % 2 == 0) {
if (!defined('RESTORE_SILENTLY')) {
echo ".";
if (($i+1) % 40 == 0) {
echo "<br />";
}
}
backup_flush(300);
}
}
return $status;
}
function question_restore_answers ($old_question_id,$new_question_id,$info,$restore) {
global $CFG;
$status = true;
//Get the answers array
if (isset($info['#']['ANSWERS']['0']['#']['ANSWER'])) {
$answers = $info['#']['ANSWERS']['0']['#']['ANSWER'];
//Iterate over answers
for($i = 0; $i < sizeof($answers); $i++) {
$ans_info = $answers[$i];
//traverse_xmlize($ans_info); //Debug
//print_object ($GLOBALS['traverse_array']); //Debug
//$GLOBALS['traverse_array']=""; //Debug
//We'll need this later!!
$oldid = backup_todb($ans_info['#']['ID']['0']['#']);
//Now, build the question_answers record structure
$answer = new stdClass;
$answer->question = $new_question_id;
$answer->answer = backup_todb($ans_info['#']['ANSWER_TEXT']['0']['#']);
$answer->fraction = backup_todb($ans_info['#']['FRACTION']['0']['#']);
$answer->feedback = backup_todb($ans_info['#']['FEEDBACK']['0']['#']);
//The structure is equal to the db, so insert the question_answers
$newid = insert_record ("question_answers",$answer);
//Do some output
if (($i+1) % 50 == 0) {
if (!defined('RESTORE_SILENTLY')) {
echo ".";
if (($i+1) % 1000 == 0) {
echo "<br />";
}
}
backup_flush(300);
}
if ($newid) {
//We have the newid, update backup_ids
backup_putid($restore->backup_unique_code,"question_answers",$oldid,
$newid);
} else {
$status = false;
}
}
}
return $status;
}
function question_restore_map_answers ($old_question_id,$new_question_id,$info,$restore) {
global $CFG;
$status = true;
if (!isset($info['#']['ANSWERS'])) { // No answers in this question (eg random)
return $status;
}
//Get the answers array
$answers = $info['#']['ANSWERS']['0']['#']['ANSWER'];
//Iterate over answers
for($i = 0; $i < sizeof($answers); $i++) {
$ans_info = $answers[$i];
//traverse_xmlize($ans_info); //Debug
//print_object ($GLOBALS['traverse_array']); //Debug
//$GLOBALS['traverse_array']=""; //Debug
//We'll need this later!!
$oldid = backup_todb($ans_info['#']['ID']['0']['#']);
//Now, build the question_answers record structure
$answer->question = $new_question_id;
$answer->answer = backup_todb($ans_info['#']['ANSWER_TEXT']['0']['#']);
$answer->fraction = backup_todb($ans_info['#']['FRACTION']['0']['#']);
$answer->feedback = backup_todb($ans_info['#']['FEEDBACK']['0']['#']);
//If we are in this method is because the question exists in DB, so its
//answers must exist too.
//Now, we are going to look for that answer in DB and to create the
//mappings in backup_ids to use them later where restoring states (user level).
//Get the answer from DB (by question and answer)
$db_answer = get_record ("question_answers","question",$new_question_id,
"answer",$answer->answer);
//Do some output
if (($i+1) % 50 == 0) {
if (!defined('RESTORE_SILENTLY')) {
echo ".";
if (($i+1) % 1000 == 0) {
echo "<br />";
}
}
backup_flush(300);
}
if ($db_answer) {
//We have the database answer, update backup_ids
backup_putid($restore->backup_unique_code,"question_answers",$oldid,
$db_answer->id);
} else {
$status = false;
}
}
return $status;
}
function question_restore_numerical_units ($old_question_id,$new_question_id,$info,$restore) {
global $CFG;
$status = true;
//Get the numerical array
$numerical_units = $info['#']['NUMERICAL_UNITS']['0']['#']['NUMERICAL_UNIT'];
//Iterate over numerical_units
for($i = 0; $i < sizeof($numerical_units); $i++) {
$nu_info = $numerical_units[$i];
//traverse_xmlize($nu_info); //Debug
//print_object ($GLOBALS['traverse_array']); //Debug
//$GLOBALS['traverse_array']=""; //Debug
//Now, build the question_numerical_UNITS record structure
$numerical_unit = new stdClass;
$numerical_unit->question = $new_question_id;
$numerical_unit->multiplier = backup_todb($nu_info['#']['MULTIPLIER']['0']['#']);
$numerical_unit->unit = backup_todb($nu_info['#']['UNIT']['0']['#']);
//The structure is equal to the db, so insert the question_numerical_units
$newid = insert_record ("question_numerical_units",$numerical_unit);
if (!$newid) {
$status = false;
}
}
return $status;
}
function question_restore_dataset_definitions ($old_question_id,$new_question_id,$info,$restore) {
global $CFG;
$status = true;
//Get the dataset_definitions array
$dataset_definitions = $info['#']['DATASET_DEFINITIONS']['0']['#']['DATASET_DEFINITION'];
//Iterate over dataset_definitions
for($i = 0; $i < sizeof($dataset_definitions); $i++) {
$dd_info = $dataset_definitions[$i];
//traverse_xmlize($dd_info); //Debug
//print_object ($GLOBALS['traverse_array']); //Debug
//$GLOBALS['traverse_array']=""; //Debug
//Now, build the question_dataset_DEFINITION record structure
$dataset_definition = new stdClass;
$dataset_definition->category = backup_todb($dd_info['#']['CATEGORY']['0']['#']);
$dataset_definition->name = backup_todb($dd_info['#']['NAME']['0']['#']);
$dataset_definition->type = backup_todb($dd_info['#']['TYPE']['0']['#']);
$dataset_definition->options = backup_todb($dd_info['#']['OPTIONS']['0']['#']);
$dataset_definition->itemcount = backup_todb($dd_info['#']['ITEMCOUNT']['0']['#']);
//We have to recode the category field (only if the category != 0)
if ($dataset_definition->category != 0) {
$category = backup_getid($restore->backup_unique_code,"question_categories",$dataset_definition->category);
if ($category) {
$dataset_definition->category = $category->new_id;
} else {
echo 'Could not recode category id '.$dataset_definition->category.' for dataset definition'.$dataset_definition->name.'<br />';
}
}
//Now, we hace to decide when to create the new records or reuse an existing one
$create_definition = false;
//If the dataset_definition->category = 0, it's a individual question dataset_definition, so we'll create it
if ($dataset_definition->category == 0) {
$create_definition = true;
} else {
//The category isn't 0, so it's a category question dataset_definition, we have to see if it exists
//Look for a definition with the same category, name and type
if ($definitionrec = get_record_sql("SELECT d.*
FROM {$CFG->prefix}question_dataset_definitions d
WHERE d.category = '$dataset_definition->category' AND
d.name = '$dataset_definition->name' AND
d.type = '$dataset_definition->type'")) {
//Such dataset_definition exist. Now we must check if it has enough itemcount
if ($definitionrec->itemcount < $dataset_definition->itemcount) {
//We haven't enough itemcount, so we have to create the definition as an individual question one.
$dataset_definition->category = 0;
$create_definition = true;
} else {
//We have enough itemcount, so we'll reuse the existing definition
$create_definition = false;
$newid = $definitionrec->id;
}
} else {
//Such dataset_definition doesn't exist. We'll create it.
$create_definition = true;
}
}
//If we've to create the definition, do it
if ($create_definition) {
//The structure is equal to the db, so insert the question_dataset_definitions
$newid = insert_record ("question_dataset_definitions",$dataset_definition);
if ($newid) {
//Restore question_dataset_items
$status = question_restore_dataset_items($newid,$dd_info,$restore);
}
}
//Now, we must have a definition (created o reused). Its id is in newid. Create the question_datasets record
//to join the question and the dataset_definition
if ($newid) {
$question_dataset = new stdClass;
$question_dataset->question = $new_question_id;
$question_dataset->datasetdefinition = $newid;
$newid = insert_record ("question_datasets",$question_dataset);
}
if (!$newid) {
$status = false;
}
}
return $status;
}
function question_restore_dataset_items ($definitionid,$info,$restore) {
global $CFG;
$status = true;
//Get the items array
$dataset_items = $info['#']['DATASET_ITEMS']['0']['#']['DATASET_ITEM'];
//Iterate over dataset_items
for($i = 0; $i < sizeof($dataset_items); $i++) {
$di_info = $dataset_items[$i];
//traverse_xmlize($di_info); //Debug
//print_object ($GLOBALS['traverse_array']); //Debug
//$GLOBALS['traverse_array']=""; //Debug
//Now, build the question_dataset_ITEMS record structure
$dataset_item = new stdClass;
$dataset_item->definition = $definitionid;
$dataset_item->number = backup_todb($di_info['#']['NUMBER']['0']['#']);
$dataset_item->value = backup_todb($di_info['#']['VALUE']['0']['#']);
//The structure is equal to the db, so insert the question_dataset_items
$newid = insert_record ("question_dataset_items",$dataset_item);
if (!$newid) {
$status = false;
}
}
return $status;
}
//This function restores the question_states
function question_states_restore_mods($attempt_id,$info,$restore) {
global $CFG, $QTYPES;
$status = true;
//Get the question_states array
$states = $info['#']['STATES']['0']['#']['STATE'];
//Iterate over states
for($i = 0; $i < sizeof($states); $i++) {
$res_info = $states[$i];
//traverse_xmlize($res_info); //Debug
//print_object ($GLOBALS['traverse_array']); //Debug
//$GLOBALS['traverse_array']=""; //Debug
//We'll need this later!!
$oldid = backup_todb($res_info['#']['ID']['0']['#']);
//Now, build the STATES record structure
$state = new stdClass;
$state->attempt = $attempt_id;
$state->question = backup_todb($res_info['#']['QUESTION']['0']['#']);
$state->originalquestion = backup_todb($res_info['#']['ORIGINALQUESTION']['0']['#']);
$state->seq_number = backup_todb($res_info['#']['SEQ_NUMBER']['0']['#']);
$state->answer = backup_todb($res_info['#']['ANSWER']['0']['#']);
$state->timestamp = backup_todb($res_info['#']['TIMESTAMP']['0']['#']);
$state->event = backup_todb($res_info['#']['EVENT']['0']['#']);
$state->grade = backup_todb($res_info['#']['GRADE']['0']['#']);
$state->raw_grade = backup_todb($res_info['#']['RAW_GRADE']['0']['#']);
$state->penalty = backup_todb($res_info['#']['PENALTY']['0']['#']);
//We have to recode the question field
$question = backup_getid($restore->backup_unique_code,"question",$state->question);
if ($question) {
$state->question = $question->new_id;
} else {
echo 'Could not recode question id '.$state->question.' for state '.$oldid.'<br />';
}
//We have to recode the originalquestion field if it is nonzero
if ($state->originalquestion) {
$question = backup_getid($restore->backup_unique_code,"question",$state->originalquestion);
if ($question) {
$state->originalquestion = $question->new_id;
} else {
echo 'Could not recode originalquestion id '.$state->question.' for state '.$oldid.'<br />';
}
}
//We have to recode the answer field
//It depends of the question type !!
//We get the question first
if (!$question = get_record("question","id",$state->question)) {
error("Can't find the record for question $state->question for which I am trying to restore a state");
}
//Depending on the qtype, we make different recodes
if ($state->answer) {
$state->answer = $QTYPES[$question->qtype]->restore_recode_answer($state, $restore);
}
//The structure is equal to the db, so insert the question_states
$newid = insert_record ("question_states",$state);
//Do some output
if (($i+1) % 10 == 0) {
if (!defined('RESTORE_SILENTLY')) {
echo ".";
if (($i+1) % 200 == 0) {
echo "<br />";
}
}
backup_flush(300);
}
if ($newid) {
//We have the newid, update backup_ids
backup_putid($restore->backup_unique_code,"question_states",$oldid,
$newid);
//Now process question type specific state information
$qtype = get_field('question', 'qtype', 'id', $state->question);
$status = $QTYPES[$qtype]->restore_state($newid,$res_info,$restore);
} else {
$status = false;
}
}
//Get the question_sessions array
$sessions = $info['#']['NEWEST_STATES']['0']['#']['NEWEST_STATE'];
//Iterate over question_sessions
for($i = 0; $i < sizeof($sessions); $i++) {
$res_info = $sessions[$i];
//traverse_xmlize($res_info); //Debug
//print_object ($GLOBALS['traverse_array']); //Debug
//$GLOBALS['traverse_array']=""; //Debug
//Now, build the NEWEST_STATES record structure
$session = new stdClass;
$session->attemptid = $attempt_id;
$session->questionid = backup_todb($res_info['#']['QUESTIONID']['0']['#']);
$session->newest = backup_todb($res_info['#']['NEWEST']['0']['#']);
$session->newgraded = backup_todb($res_info['#']['NEWGRADED']['0']['#']);
$session->sumpenalty = backup_todb($res_info['#']['SUMPENALTY']['0']['#']);
//We have to recode the question field
$question = backup_getid($restore->backup_unique_code,"question",$session->questionid);
if ($question) {
$session->questionid = $question->new_id;
} else {
echo 'Could not recode question id '.$session->questionid.'<br />';
}
//We have to recode the newest field
$state = backup_getid($restore->backup_unique_code,"question_states",$session->newest);
if ($state) {
$session->newest = $state->new_id;
} else {
echo 'Could not recode newest state id '.$session->newest.'<br />';
}
//If the session has been graded we have to recode the newgraded field
if ($session->newgraded) {
$state = backup_getid($restore->backup_unique_code,"question_states",$session->newgraded);
if ($state) {
$session->newgraded = $state->new_id;
} else {
echo 'Could not recode newest graded state id '.$session->newgraded.'<br />';
}
}
//The structure is equal to the db, so insert the question_sessions
$newid = insert_record ("question_sessions",$session);
}
return $status;
}
?>
|
