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locallib.php
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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle 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, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle 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 Moodle. If not, see <http://www.gnu.org/licenses/>.
if (!defined('MOODLE_INTERNAL')) {
die('Direct access to this script is forbidden.'); // It must be included from a Moodle page.
}
// Include those library functions that are also used by core Moodle or other modules.
require_once($CFG->dirroot . '/mod/game/lib.php');
require_once($CFG->dirroot . '/mod/quiz/locallib.php');
// CONSTANTS.
/*
* Options determining how the grades from individual attempts are combined to give
* the overall grade for a user
*/
define( "GAME_GRADEMETHOD_HIGHEST", "1");
define( "GAME_GRADEMETHOD_AVERAGE", "2");
define( "GAME_GRADEMETHOD_FIRST", "3");
define( "GAME_GRADEMETHOD_LAST", "4");
$gamegrademethod = array ( GAME_GRADEMETHOD_HIGHEST => get_string("gradehighest", "game"),
GAME_GRADEMETHOD_AVERAGE => get_string("gradeaverage", "game"),
GAME_GRADEMETHOD_FIRST => get_string("attemptfirst", "game"),
GAME_GRADEMETHOD_LAST => get_string("attemptlast", "game"));
define( "CONST_GAME_TRIES_REPETITION", "3");
function game_get_moodle_version() {
global $DB;
static $smoodleversion = null;
if ($smoodleversion != null) {
return $smoodleversion;
}
$rec = $DB->get_record_select( 'config', "name='release'");
if ($rec == false) {
return $smoodleversion = '';
} else {
$a = explode( '.', $rec->value);
return $smoodleversion = sprintf( '%02u.%02u', $a[ 0], $a[ 1]);
}
}
function game_upper( $str, $lang='') {
if ($lang == 'user') {
return $str;
}
$str = game_strtoupper( $str);
switch ($lang) {
case 'el':
$from = 'ΆΈΉΊΌΎΏ';
$to = 'ΑΕΗΙΟΥΩ';
break;
default:
return $str;
}
$len = game_strlen( $from);
for ($i = 0; $i < $len; $i++) {
$str = str_replace( game_substr( $from, $i, 1), game_substr( $to, $i, 1), $str);
}
return $str;
}
function game_showselectcontrol( $name, $a, $input, $events='') {
$ret = "<select id=\"$name\" name=\"$name\" $events>";
foreach ($a as $key => $caption) {
$ret .= '<option value="'.$key.'" ';
if ($key == $input) {
$ret .= ' selected="selected" ';
}
$ret .= '>'.$caption."</option>\r\n";
}
$ret .= "</select>\r\n";
return $ret;
}
function game_showcheckbox( $name, $value) {
$a = array();
$a[ 0] = get_string( 'no');
$a[ 1] = get_string( 'yes');
return game_showselectcontrol( $name, $a, $value);
}
// Used by hangman.
function game_question_shortanswer( $game, $allowspaces=false, $userepetitions=true) {
switch( $game->sourcemodule)
{
case 'glossary':
return game_question_shortanswer_glossary( $game, $allowspaces, $userepetitions);
case 'quiz':
return game_question_shortanswer_quiz( $game, $allowspaces, $userepetitions);
case 'question':
return game_question_shortanswer_question( $game, $allowspaces, $userepetitions);
}
return false;
}
// Used by hangman.
function game_question_shortanswer_glossary( $game, $allowspaces, $userepetitions) {
global $DB;
if ($game->glossaryid == 0) {
print_error( get_string( 'must_select_glossary', 'game'));
}
$select = "glossaryid={$game->glossaryid}";
$table = '{glossary_entries} ge';
if ($game->glossarycategoryid) {
$table .= ',{glossary_entries_categories} gec';
$select .= ' AND gec.entryid = ge.id '.
" AND gec.categoryid = {$game->glossarycategoryid}";
}
if ($allowspaces == false) {
$select .= " AND concept NOT LIKE '% %' ";
}
if ($game->glossaryonlyapproved) {
// Only approved glossary entries will be used.
$select .= ' AND (ge.approved=1 OR teacherentry=1)';
}
if (($id = game_question_selectrandom( $game, $table, $select, 'ge.id', $userepetitions)) == false) {
return false;
}
$sql = 'SELECT id, concept as answertext, definition as questiontext, id as glossaryentryid, '.
' 0 as questionid, glossaryid, attachment, 0 as answerid'.
" FROM {glossary_entries} ge WHERE id = $id";
if (($rec = $DB->get_record_sql( $sql)) == false) {
return false;
}
if ( $rec->attachment != '') {
$rec->attachment = "glossary/{$game->glossaryid}/$rec->id/$rec->attachment";
}
return $rec;
}
// Used by hangman.
function game_question_shortanswer_quiz( $game, $allowspaces, $userepetitions) {
global $DB;
if ($game->quizid == 0) {
print_error( get_string( 'must_select_quiz', 'game'));
}
if (game_get_moodle_version() < '02.07') {
$select = "qtype='shortanswer' AND quiz='$game->quizid' ".
" AND qqi.question=q.id";
$table = "{question} q,{quiz_question_instances} qqi";
} else {
$select = "qtype='shortanswer' AND qs.quizid='$game->quizid' ".
" AND qs.questionid=q.id";
$table = "{question} q,{quiz_slots} qs";
}
$fields = "q.id";
if (($id = game_question_selectrandom( $game, $table, $select, $fields, $userepetitions)) == false) {
return false;
}
$select = "q.id=$id AND qa.question=$id".
" AND q.hidden=0 AND qtype='shortanswer'";
$table = "{question} q,{question_answers} qa";
$fields = "qa.id as answerid, q.id, q.questiontext as questiontext, ".
"qa.answer as answertext, q.id as questionid, ".
"0 as glossaryentryid, '' as attachment";
// Maybe there are more answers to one question. I use as correct the one with bigger fraction.
$sql = "SELECT $fields FROM $table WHERE $select ORDER BY fraction DESC";
if (($recs = $DB->get_records_sql( $sql, null, 0, 1)) == false) {
return false;
}
foreach ($recs as $rec) {
return $rec;
}
}
// Used by hangman.
function game_question_shortanswer_question( $game, $allowspaces, $userepetitions) {
global $DB;
if ($game->questioncategoryid == 0) {
print_error( get_string( 'must_select_questioncategory', 'game'));
}
$select = 'category='.$game->questioncategoryid;
if ($game->subcategories) {
$cats = question_categorylist( $game->questioncategoryid);
if (count( $cats) > 0) {
$s = implode( ',', $cats);
$select = 'category in ('.$s.')';
}
}
$select .= " AND qtype='shortanswer'";
$table = '{question} q';
$fields = 'q.id';
if (($id = game_question_selectrandom( $game, $table, $select, $fields, $userepetitions)) == false) {
return false;
}
$select = "q.id=$id AND qa.question=$id".
" AND q.hidden=0 AND qtype='shortanswer'";
$table = "{question} q,{question_answers} qa";
$fields = "qa.id as answerid, q.id, q.questiontext as questiontext, ".
"qa.answer as answertext, q.id as questionid, ".
"0 as glossaryentryid, '' as attachment";
// Maybe there are more answers to one question. I use as correct the one with bigger fraction.
$sql = "SELECT $fields FROM $table WHERE $select ORDER BY fraction DESC";
if (($recs = $DB->get_records_sql( $sql, null, 0, 1)) == false) {
return false;
}
foreach ($recs as $rec) {
return $rec;
}
}
// Used by millionaire, game_question_shortanswer_quiz, hidden picture.
function game_question_selectrandom( $game, $table, $select, $idfields='id', $userepetitions=true) {
global $DB, $USER;
$count = $DB->get_field_sql( "SELECT COUNT(*) FROM $table WHERE $select");
if ($count == 0) {
return false;
}
$minnum = 0;
$minid = 0;
for ($i = 1; $i <= CONST_GAME_TRIES_REPETITION; $i++) {
$sel = mt_rand(0, $count - 1);
$sql = "SELECT $idfields, $idfields FROM ".$table." WHERE $select";
if (($recs = $DB->get_records_sql( $sql, null, $sel, 1)) == false) {
return false;
}
$id = 0;
foreach ($recs as $rec) {
$id = $rec->id;
}
if ($minid == 0) {
$minid = $id;
}
if ($userepetitions == false) {
return $id;
}
if ($count == 1) {
break;
}
$questionid = $glossaryentryid = 0;
if ($game->sourcemodule == 'glossary') {
$glossaryentryid = $id;
} else {
$questionid = $id;
}
$a = array( 'gameid' => $game->id, 'userid' => $USER->id, 'questionid' => $questionid,
'glossaryentryid' => $glossaryentryid);
if (($rec = $DB->get_record( 'game_repetitions', $a, 'id,repetitions AS r')) != false) {
if (($rec->r < $minnum) or ($minnum == 0)) {
$minnum = $rec->r;
$minid = $id;
}
} else {
$minid = $questionid;
break;
}
}
if ($game->sourcemodule == 'glossary') {
game_update_repetitions( $game->id, $USER->id, 0, $minid);
} else {
game_update_repetitions( $game->id, $USER->id, $minid, 0);
}
return $minid;
}
function game_update_repetitions( $gameid, $userid, $questionid, $glossaryentryid) {
global $DB;
$a = array( 'gameid' => $gameid, 'userid' => $userid, 'questionid' => $questionid, 'glossaryentryid' => $glossaryentryid);
if (($rec = $DB->get_record( 'game_repetitions', $a, 'id,repetitions AS r')) != false) {
$updrec = new stdClass();
$updrec->id = $rec->id;
$updrec->repetitions = $rec->r + 1;
if (!$DB->update_record( 'game_repetitions', $updrec)) {
print_error("Update page: can't update game_repetitions id={$updrec->id}");
}
} else {
$newrec = new stdClass();
$newrec->gameid = $gameid;
$newrec->userid = $userid;
$newrec->questionid = $questionid;
$newrec->glossaryentryid = $glossaryentryid;
$newrec->repetitions = 1;
if ($newrec->questionid == '') {
$newrec->questionid = 0;
}
if ($newrec->glossaryentryid == '') {
$newrec->glossaryentryid = 0;
}
if (!$DB->insert_record( 'game_repetitions', $newrec)) {
print_error("Insert page: new page game_repetitions not inserted");
}
}
}
// Used by sudoku.
function game_questions_selectrandom( $game, $count=1) {
global $DB;
switch( $game->sourcemodule)
{
case 'quiz':
if ($game->quizid == 0) {
print_error( get_string( 'must_select_quiz', 'game'));
}
if (game_get_moodle_version() < '02.07') {
$table = '{question} q, {quiz_question_instances} qqi';
$select = " qqi.quiz=$game->quizid".
" AND qqi.question=q.id ".
" AND q.qtype in ('shortanswer', 'truefalse', 'multichoice')".
" AND q.hidden=0";
} else {
$table = '{question} q, {quiz_slots} qs';
$select = " qs.quizid=$game->quizid".
" AND qs.questionid=q.id ".
" AND q.qtype in ('shortanswer', 'truefalse', 'multichoice')".
" AND q.hidden=0";
}
// Todo 'match'.
$field = "q.id as id";
$table2 = 'question';
$fields2 = 'id as questionid,0 as glossaryentryid,qtype';
break;
case 'glossary':
if ($game->glossaryid == 0) {
print_error( get_string( 'must_select_glossary', 'game'));
}
$table = '{glossary_entries} ge';
$select = "glossaryid='$game->glossaryid' ";
if ($game->glossarycategoryid) {
$table .= ',{glossary_entries_categories} gec';
$select .= " AND gec.entryid = ge.id ".
" AND gec.categoryid = {$game->glossarycategoryid}";
}
$field = 'ge.id';
$table2 = 'glossary_entries';
$fields2 = 'id as glossaryentryid, 0 as questionid';
break;
case 'question':
if ($game->questioncategoryid == 0) {
print_error( get_string( 'must_select_questioncategory', 'game'));
}
$table = '{question} q';
// Inlcude subcategories.
$select = 'category='.$game->questioncategoryid;
if ($game->subcategories) {
$cats = question_categorylist( $game->questioncategoryid);
if (count( $cats)) {
$select = 'category in ('.implode( ',', $cats).')';
}
}
$select .= " AND q.qtype in ('shortanswer', 'truefalse', 'multichoice') AND q.hidden=0";
// Todo 'match'.
$field = "id";
$table2 = 'question';
$fields2 = 'id as questionid,0 as glossaryentryid';
break;
default:
print_error( 'No sourcemodule defined');
break;
}
$ids = game_questions_selectrandom_detail( $table, $select, $field, $count);
if ($ids === false) {
print_error( get_string( 'no_questions', 'game'));
}
if (count( $ids) > 1) {
// Randomize the array.
shuffle( $ids);
}
$ret = array();
foreach ($ids as $id) {
if ($recquestion = $DB->get_record( $table2, array( 'id' => $id), $fields2)) {
$new = new stdClass();
$new->questionid = (int )$recquestion->questionid;
$new->glossaryentryid = (int )$recquestion->glossaryentryid;
$ret[] = $new;
}
}
return $ret;
}
// Used by game_questions_selectrandom.
function game_questions_selectrandom_detail( $table, $select, $idfield="id", $count=1) {
global $DB;
$sql = "SELECT $idfield FROM $table WHERE $select";
if (($recs = $DB->get_records_sql( $sql)) == false) {
return false;
}
// The array contains the ids of all questions.
$a = array();
foreach ($recs as $rec) {
$a[ $rec->id] = $rec->id;
}
if ($count >= count( $a)) {
return $a;
} else {
$id = array_rand( $a, $count);
return ($count == 1 ? array( $id) : $id);
}
}
// Tries to detect the language of word.
function game_detectlanguage( $word) {
global $CFG;
$langs = get_string_manager()->get_list_of_translations();
// English has more priority.
if (array_key_exists( 'en', $langs)) {
unset( $langs[ 'en']);
$langs[ ''] = '';
}
ksort( $langs);
$langsinstalled = get_string_manager()->get_list_of_translations();
foreach ($langs as $lang => $name) {
if ($lang == '') {
$lang = 'en';
}
if (!array_key_exists( $lang, $langsinstalled)) {
continue;
}
$strings = get_string_manager()->load_component_strings( 'game', $lang);
if (isset( $strings[ 'lettersall'])) {
$letters = $strings[ 'lettersall'];
$word2 = game_upper( $word, $lang);
if (hangman_existall( $word2, $letters)) {
return $lang;
}
}
}
return false;
}
// The words maybe are in two languages e.g. greek or english so I try to find the correct one.
function game_getallletters( $word, $lang='', $userlanguage='') {
for (;;) {
if ($lang == 'user') {
$letters = $userlanguage;
if (hangman_existall( $word, $letters)) {
return $letters;
} else {
return '';
}
} else {
$strings = get_string_manager()->load_component_strings( 'game', ($lang == '' ? 'en' : $lang));
if (isset( $strings[ 'lettersall'])) {
$letters = $strings[ 'lettersall'];
$word2 = game_upper( $word, $lang);
if (hangman_existall( $word2, $letters)) {
return $letters;
}
}
if ($lang == '') {
break;
} else {
$lang = '';
}
}
}
return '';
}
function hangman_existall( $str, $strfind) {
$n = game_strlen( $str);
for ($i = 0; $i < $n; $i++) {
$pos = game_strpos( $strfind, game_substr( $str, $i, 1));
if ($pos === false) {
return false;
}
}
return true;
}
// Used by cross.
function game_questions_shortanswer( $game) {
switch( $game->sourcemodule) {
case 'glossary':
$recs = game_questions_shortanswer_glossary( $game);
break;
case 'quiz';
$recs = game_questions_shortanswer_quiz( $game);
break;
case 'question';
$recs = game_questions_shortanswer_question( $game);
break;
}
return $recs;
}
// Used by cross.
function game_questions_shortanswer_glossary( $game) {
global $DB;
$select = "glossaryid={$game->glossaryid}";
$table = '{glossary_entries} ge';
if ($game->glossarycategoryid) {
$table .= ',{glossary_entries_categories} gec';
$select .= ' AND gec.entryid = ge.id '.
' AND gec.categoryid = '.$game->glossarycategoryid;
}
$sql = 'SELECT ge.id, concept as answertext, definition as questiontext, ge.id as glossaryentryid, '.
' 0 as questionid, attachment '.
" FROM $table WHERE $select";
return $DB->get_records_sql( $sql);
}
// Used by cross.
function game_questions_shortanswer_quiz( $game) {
global $DB;
if ($game->quizid == 0) {
print_error( get_string( 'must_select_quiz', 'game'));
}
if (game_get_moodle_version() < '02.07') {
$select = "qtype='shortanswer' AND quiz='$game->quizid' ".
" AND qqi.question=q.id".
" AND qa.question=q.id".
" AND q.hidden=0";
$table = "{question} q,{quiz_question_instances} qqi,{question_answers} qa";
$fields = "qa.id as qaid, q.id, q.questiontext as questiontext, ".
"qa.answer as answertext, q.id as questionid,".
" 0 as glossaryentryid,'' as attachment";
} else {
$select = "qtype='shortanswer' AND qs.quizid='$game->quizid' ".
" AND qs.questionid=q.id".
" AND qa.question=q.id".
" AND q.hidden=0";
$table = "{question} q,{quiz_slots} qs,{question_answers} qa";
$fields = "qa.id as qaid, q.id, q.questiontext as questiontext, ".
"qa.answer as answertext, q.id as questionid,".
" 0 as glossaryentryid,'' as attachment";
}
return game_questions_shortanswer_question_fraction( $table, $fields, $select);
}
// Used by cross.
function game_questions_shortanswer_question( $game) {
if ($game->questioncategoryid == 0) {
print_error( get_string( 'must_select_questioncategory', 'game'));
}
// Include subcategories.
$select = 'q.category='.$game->questioncategoryid;
if ($game->subcategories) {
$cats = question_categorylist( $game->questioncategoryid);
if (count( $cats)) {
$select = 'q.category in ('.implode(',', $cats).')';
}
}
$select .= " AND qtype='shortanswer' ".
" AND qa.question=q.id".
" AND q.hidden=0";
$table = "{question} q,{question_answers} qa";
$fields = "qa.id as qaid, q.id, q.questiontext as questiontext, ".
"qa.answer as answertext, q.id as questionid";
return game_questions_shortanswer_question_fraction( $table, $fields, $select);
}
function game_questions_shortanswer_question_fraction( $table, $fields, $select) {
global $DB;
$sql = "SELECT $fields FROM $table WHERE $select ORDER BY fraction DESC";
$recs = $DB->get_records_sql( $sql);
if ($recs == false) {
print_error( get_string( 'no_questions', 'game'));
}
$recs2 = array();
$map = array();
foreach ($recs as $rec) {
if (array_key_exists( $rec->questionid, $map)) {
continue;
}
$rec2 = new stdClass();
$rec2->id = $rec->id;
$rec2->questiontext = $rec->questiontext;
$rec2->answertext = $rec->answertext;
$rec2->questionid = $rec->questionid;
$rec2->glossaryentryid = 0;
$rec2->attachment = '';
$recs2[] = $rec2;
$map[ $rec->questionid] = $rec->questionid;
}
return $recs2;
}
function game_setchar( &$s, $pos, $char) {
$ret = "";
if ($pos > 0) {
$ret .= game_substr( $s, 0, $pos);
}
$s = $ret . $char . game_substr( $s, $pos + 1);
}
function game_insert_record( $table, $rec) {
global $DB;
if ($DB->get_record($table, array('id' => $rec->id), 'id,id') == false) {
$sql = 'INSERT INTO {'.$table.'}(id) VALUES('.$rec->id.')';
if (!$DB->execute( $sql)) {
print_error( "Cannot insert an empty $table with id=$rec->id");
return false;
}
}
if (isset( $rec->question)) {
$temp = $rec->question;
$rec->question = addslashes( $rec->question);
}
$ret = $DB->update_record( $table, $rec);
if (isset( $rec->question)) {
$rec->question = $temp;
}
return $ret;
}
// If score is negative doesn't update the record score is between 0 and 1.
function game_updateattempts( $game, $attempt, $score, $finished) {
global $DB, $USER;
if ($attempt != false) {
$updrec = new stdClass();
$updrec->id = $attempt->id;
$updrec->timelastattempt = time();
$updrec->lastip = getremoteaddr();
if (isset( $_SERVER[ 'REMOTE_HOST'])) {
$updrec->lastremotehost = $_SERVER[ 'REMOTE_HOST'];
} else {
$updrec->lastremotehost = gethostbyaddr( $updrec->lastip);
}
$updrec->lastip = substr( $updrec->lastip, 0, 30);
$updrec->lastremotehost = substr( $updrec->lastremotehost, 0, 50);
if ($score >= 0) {
$updrec->score = $score;
}
if ($finished) {
$updrec->timefinish = $updrec->timelastattempt;
}
$updrec->attempts = $attempt->attempts + 1;
if (!$DB->update_record( 'game_attempts', $updrec)) {
print_error( "game_updateattempts: Can't update game_attempts id=$updrec->id");
}
// Update grade item and send all grades to gradebook.
$grades = new stdClass();
$grades->userid = $USER->id;
$grades->rawgrade = game_score_to_grade($score, $game);
$grades->datesubmitted = time();
game_grade_item_update( $game, $grades);
game_update_grades( $game, $grades->userid);
}
// Update table game_grades.
if ($finished) {
game_save_best_score( $game);
}
}
function game_updateattempts_maxgrade( $game, $attempt, $grade, $finished) {
global $DB;
$recgrade = $DB->get_field( 'game_attempts', 'score', array( 'id' => $attempt->id));
if ($recgrade > $grade) {
$grade = -1; // Don't touch the grade.
}
game_updateattempts( $game, $attempt, $grade, $finished);
}
function game_update_queries( $game, $attempt, $query, $score, $studentanswer, $updatetries=false) {
global $DB, $USER;
if ($query->id != 0) {
$select = "id=$query->id";
} else {
$select = "attemptid = $attempt->id AND sourcemodule = '{$query->sourcemodule}'";
switch ($query->sourcemodule) {
case 'quiz':
$select .= " AND questionid='$query->questionid' ";
break;
case 'glossary':
$select .= " AND glossaryentryid='$query->glossaryentryid'";
break;
}
}
if (($recq = $DB->get_record_select( 'game_queries', $select)) === false) {
$recq = new stdClass();
$recq->gamekind = $game->gamekind;
$recq->gameid = $attempt->gameid;
$recq->userid = $attempt->userid;
$recq->attemptid = $attempt->id;
$recq->sourcemodule = $query->sourcemodule;
$recq->questionid = $query->questionid;
$recq->glossaryentryid = $query->glossaryentryid;
if ($updatetries) {
$recq->tries = 1;
}
if (!($recq->id = $DB->insert_record( 'game_queries', $recq))) {
print_error( 'Insert page: new page game_queries not inserted');
}
}
$updrec = new stdClass();
$updrec->id = $recq->id;
$updrec->timelastattempt = time();
if ($score >= 0) {
$updrec->score = $score;
}
if ($studentanswer != '') {
$updrec->studentanswer = $studentanswer;
}
if ($updatetries) {
$updrec->tries = $recq->tries + 1;
}
if (!($DB->update_record( 'game_queries', $updrec))) {
print_error( "game_update_queries: not updated id=$updrec->id");
}
}
function game_getattempt( $game, &$detail, $autoadd=false) {
global $DB, $USER;
$select = "gameid=$game->id AND userid=$USER->id and timefinish=0 ";
if ($USER->id == 1) {
$key = 'mod/game:instanceid'.$game->id;
if (array_key_exists( $key, $_SESSION)) {
$select .= ' AND id="'.$_SESSION[ $key].'"';
} else {
$select .= ' AND id=-1';
}
}
if (($recs = $DB->get_records_select( 'game_attempts', $select))) {
foreach ($recs as $attempt) {
if ($USER->id == 1) {
$_SESSION[ $key] = $attempt->id;
}
$detail = $DB->get_record( 'game_'.$game->gamekind, array( 'id' => $attempt->id));
return $attempt;
}
}
if ($autoadd) {
game_addattempt( $game);
return game_getattempt( $game, $detail, false);
}
return false;
}
/**
* @param integer $gameid the game id.
* @param integer $userid the userid.
* @param string $status 'all', 'finished' or 'unfinished' to control
* @return an array of all the user's attempts at this game. Returns an empty array if there are none.
*/
function game_get_user_attempts( $gameid, $userid, $status = 'finished') {
global $DB;
$statuscondition = array(
'all' => '',
'finished' => ' AND timefinish > 0',
'unfinished' => ' AND timefinish = 0'
);
if ($attempts = $DB->get_records_select( 'game_attempts',
"gameid = ? AND userid = ? AND preview = 0" . $statuscondition[$status],
array( $gameid, $userid), 'attempt ASC')) {
return $attempts;
} else {
return array();
}
}
/**
* Returns an unfinished attempt (if there is one) for the given
* user on the given game. This function does not return preview attempts.
*
* @param integer $gameid the id of the game.
* @param integer $userid the id of the user.
*
* @return mixed the unfinished attempt if there is one, false if not.
*/
function game_get_user_attempt_unfinished( $gameid, $userid) {
$attempts = game_get_user_attempts( $gameid, $userid, 'unfinished');
if ($attempts) {
return array_shift($attempts);
} else {
return false;
}
}
/**
* Get the best current score for a particular user in a game.
*
* @param object $game the game object.
* @param integer $userid the id of the user.
* @return float the user's current grade for this game.
*/
function game_get_best_score($game, $userid) {
global $DB;
$score = $DB->get_field( 'game_grades', 'score', array( 'gameid' => $game->id, 'userid' => $userid));
// Need to detect errors/no result, without catching 0 scores.
if (is_numeric($score)) {
return $score;
} else {
return null;
}
}
function game_get_best_grade($game, $userid) {
$score = game_get_best_score( $game, $userid);
if (is_numeric( $score)) {
return round( $score * $game->grade, $game->decimalpoints);
} else {
return null;
}
}
function game_score_to_grade($score, $game) {
if ($score) {
return round($score * $game->grade, $game->decimalpoints);
} else {
return 0;
}
}
/**
* Determine review options
*
* @param object $game the game instance.
* @param object $attempt the attempt in question.
* @param $context the roles and permissions context,
* normally the context for the game module instance.
*
* @return object an object with boolean fields responses, scores, feedback,
* correct_responses, solutions and general feedback
*/
function game_get_reviewoptions($game, $attempt, $context=null) {
$options = new stdClass;
$options->readonly = true;
// Provide the links to the question review and comment script.
$options->questionreviewlink = '/mod/game/reviewquestion.php';
if ($context and !$attempt->preview) {
// The teacher should be shown everything except during preview when the teachers wants to see just what the students see.
$options->responses = true;
$options->scores = true;
$options->feedback = true;
$options->correct_responses = true;
$options->solutions = false;
$options->generalfeedback = true;
$options->overallfeedback = true;
// Show a link to the comment box only for closed attempts.
if ($attempt->timefinish) {
$options->questioncommentlink = '/mod/game/comment.php';
}
} else {
if (((time() - $attempt->timefinish) < 120) || $attempt->timefinish == 0) {
$gamestatemask = GAME_REVIEW_IMMEDIATELY;
} else if (!$game->timeclose or time() < $game->timeclose) {
$gamestatemask = GAME_REVIEW_OPEN;
} else {
$gamestatemask = GAME_REVIEW_CLOSED;
}
$options->responses = ($game->review & $gamestatemask & GAME_REVIEW_RESPONSES) ? 1 : 0;
$options->scores = ($game->review & $gamestatemask & GAME_REVIEW_SCORES) ? 1 : 0;
$options->feedback = ($game->review & $gamestatemask & GAME_REVIEW_FEEDBACK) ? 1 : 0;
$options->correct_responses = ($game->review & $gamestatemask & GAME_REVIEW_ANSWERS) ? 1 : 0;
$options->solutions = ($game->review & $gamestatemask & GAME_REVIEW_SOLUTIONS) ? 1 : 0;
$options->generalfeedback = ($game->review & $gamestatemask & GAME_REVIEW_GENERALFEEDBACK) ? 1 : 0;
$options->overallfeedback = $attempt->timefinish && ($game->review & $gamestatemask & GAME_REVIEW_FEEDBACK);
}
return $options;
}
function game_compute_attempt_layout( $game, &$attempt) {
global $DB;
$ret = '';
$recs = $DB->get_records_select( 'game_queries', "attemptid=$attempt->id", null, '',
'id,questionid,sourcemodule,glossaryentryid');
if ($recs) {
foreach ($recs as $rec) {
if ($rec->sourcemodule == 'glossary') {
$ret .= $rec->glossaryentryid.'G,';
} else {
$ret .= $rec->questionid.',';
}
}
}
$attempt->layout = $ret.'0';
}
/**
* Combines the review options from a number of different game attempts.
* Returns an array of two ojects, so he suggested way of calling this
* funciton is:
* list($someoptions, $alloptions) = game_get_combined_reviewoptions(...)
*