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moodle-mod_game/lib.php

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<?php // $Id: lib.php,v 1.15.2.11 2012/01/16 21:45:04 bdaloukas Exp $
/**
* Library of functions and constants for module game
*
* @author
* @version $Id: lib.php,v 1.15.2.11 2012/01/16 21:45:04 bdaloukas Exp $
* @package game
**/
/// CONSTANTS ///////////////////////////////////////////////////////////////////
/**#@+
* The different review options are stored in the bits of $game->review
* These constants help to extract the options
*/
/**
* The first 6 bits refer to the time immediately after the attempt
*/
define('GAME_REVIEW_IMMEDIATELY', 0x3f);
/**
* the next 6 bits refer to the time after the attempt but while the game is open
*/
define('GAME_REVIEW_OPEN', 0xfc0);
/**
* the final 6 bits refer to the time after the game closes
*/
define('GAME_REVIEW_CLOSED', 0x3f000);
// within each group of 6 bits we determine what should be shown
define('GAME_REVIEW_RESPONSES', 1*0x1041); // Show responses
define('GAME_REVIEW_SCORES', 2*0x1041); // Show scores
define('GAME_REVIEW_FEEDBACK', 4*0x1041); // Show feedback
define('GAME_REVIEW_ANSWERS', 8*0x1041); // Show correct answers
// Some handling of worked solutions is already in the code but not yet fully supported
// and not switched on in the user interface.
define('GAME_REVIEW_SOLUTIONS', 16*0x1041); // Show solutions
define('GAME_REVIEW_GENERALFEEDBACK', 32*0x1041); // Show general feedback
/**#@-*/
/**
* Given an object containing all the necessary data,
* (defined by the form in mod.html) this function
* will create a new instance and return the id number
* of the new instance.
*
* @param object $instance An object from the form in mod.html
* @return int The id of the newly inserted game record
**/
function game_add_instance($game) {
$game->timemodified = time();
# May have to add extra stuff in here #
game_before_add_or_update( $game);
$id = insert_record('game', $game);
$game = get_record_select( 'game', "id=$id");
// Do the processing required after an add or an update.
game_after_add_or_update( $game);
return $id;
}
/**
* Given an object containing all the necessary data,
* (defined by the form in mod.html) this function
* will update an existing instance with new data.
*
* @param object $instance An object from the form in mod.html
* @return boolean Success/Fail
**/
function game_update_instance($game) {
$game->timemodified = time();
$game->id = $game->instance;
if( !isset( $game->glossarycategoryid)){
$game->glossarycategoryid = 0;
}
if( !isset( $game->glossarycategoryid2)){
$game->glossarycategoryid2 = 0;
}
if( $game->grade == ''){
$game->grade = 0;
}
if( !isset( $game->param1)){
$game->param1 = 0;
}
if( $game->param1 == ''){
$game->param1 = 0;
}
if( !isset( $game->param2)){
$game->param2 = 0;
}
if( $game->param2 == ''){
$game->param2 = 0;
}
game_before_add_or_update( $game);
if( !update_record('game', $game)){
return false;
}
// Do the processing required after an add or an update.
game_after_add_or_update( $game);
return true;
}
/**
* Given an ID of an instance of this module,
* this function will permanently delete the instance
* and any data that depends on it.
*
* @param int $id Id of the module instance
* @return boolean Success/Failure
**/
function game_delete_instance($gameid) {
global $CFG;
$result = true;
# Delete any dependent records here #
if( ($recs = get_records_select( 'game_attempts', "gameid='$gameid'")) != false){
$ids = '';
$count = 0;
$aids = array();
foreach( $recs as $rec){
$ids .= ','.$rec->id;
if( ++$count > 10){
$count = 0;
$aids[] = $ids;
$ids = '';
}
}
if( $ids != ''){
$aids[] = $ids;
}
foreach( $aids as $ids){
if( $result == false){
break;
}
$tables = array( 'game_hangman', 'game_cross', 'game_cryptex', 'game_millionaire', 'game_bookquiz', 'game_sudoku', 'game_snakes');
foreach( $tables as $t){
$sql = "DELETE FROM {$CFG->prefix}$t WHERE id IN (".substr( $ids, 1).')';
if (!execute_sql( $sql, false)) {
$result = false;
break;
}
}
}
}
$tables = array( 'game_attempts', 'game_grades', 'game_bookquiz_questions', 'game_queries', 'game_repetitions');
foreach( $tables as $t){
if( $result == false){
break;
}
if (!delete_records( $t, 'gameid', $gameid)) {
$result = false;
}
}
$tables = array( 'game_export_javame', 'game_export_html');
foreach( $tables as $t){
if( $result == false){
break;
}
if (!delete_records( $t, 'id', $gameid)) {
$result = false;
}
}
if( $result){
if (!delete_records( 'game', "id", $gameid)) {
$result = false;
}
}
return $result;
}
/**
* Return a small object with summary information about what a
* user has done with a given particular instance of this module
* Used for user activity reports.
* $return->time = the time they did it
* $return->info = a short text description
**/
function game_user_outline($course, $user, $mod, $game) {
if ($grade = get_record_select('game_grades', "userid=$user->id AND gameid = $game->id", 'id,score,timemodified')) {
$result = new stdClass;
if ((float)$grade->score) {
$result->info = get_string('grade').':&nbsp;'.round($grade->score * $game->grade, $game->decimalpoints).' '.
get_string('percent', 'game').':&nbsp;'.round(100 * $grade->score, $game->decimalpoints).' %';
}
$result->time = $grade->timemodified;
return $result;
}
return NULL;
}
/**
* Print a detailed representation of what a user has done with
* a given particular instance of this module, for user activity reports.
**/
function game_user_complete($course, $user, $mod, $game) {
if ($attempts = get_records_select('game_attempts', "userid='$user->id' AND gameid='$game->id'", 'attempt ASC')) {
if ($game->grade && $grade = get_record('game_grades', 'userid', $user->id, 'gameid', $game->id)) {
echo get_string('grade').': '.round($grade->score * $game->grade, $game->decimalpoints).'/'.$game->grade.'<br />';
}
foreach ($attempts as $attempt) {
echo get_string('attempt', 'game').' '.$attempt->attempt.': ';
if ($attempt->timefinish == 0) {
print_string('unfinished');
} else {
echo round($attempt->score * $game->grade, $game->decimalpoints).'/'.$game->grade;
}
echo ' - '.userdate($attempt->timelastattempt).'<br />';
}
} else {
print_string('noattempts', 'game');
}
return true;
}
/**
* Given a course and a time, this module should find recent activity
* that has occurred in game activities and print it out.
* Return true if there was output, or false is there was none.
*
* @uses $CFG
* @return boolean
* @todo Finish documenting this function
**/
function game_print_recent_activity($course, $isteacher, $timestart) {
global $CFG;
return false; // True if anything was printed, otherwise false
}
/**
* Function to be run periodically according to the moodle cron
* This function searches for things that need to be done, such
* as sending out mail, toggling flags etc ...
*
* @uses $CFG
* @return boolean
* @todo Finish documenting this function
**/
function game_cron () {
global $CFG;
return true;
}
/**
* Must return an array of grades for a given instance of this module,
* indexed by user. It also returns a maximum allowed grade.
*
* Example:
* $return->grades = array of grades;
* $return->maxgrade = maximum allowed grade;
*
* return $return;
*
* @param int $gameid ID of an instance of this module
* @return mixed Null or object with an array of grades and with the maximum grade
**/
function game_grades($gameid) {
/// Must return an array of grades, indexed by user, and a max grade.
$game = get_record('game', 'id', intval($gameid));
if (empty($game) || empty($game->grade)) {
return NULL;
}
$return = new stdClass;
$return->grades = get_records_menu('game_grades', 'gameid', $game->id, '', "userid, score * {$game->grade}");
$return->maxgrade = $game->grade;
return $return;
}
/**
* Return grade for given user or all users.
*
* @param int $gameid id of game
* @param int $userid optional user id, 0 means all users
* @return array array of grades, false if none
*/
function game_get_user_grades($game, $userid=0) {
global $CFG;
$user = $userid ? "AND u.id = $userid" : "";
$sql = "SELECT u.id, u.id AS userid, $game->grade * g.score AS rawgrade, g.timemodified AS dategraded, MAX(a.timefinish) AS datesubmitted
FROM {$CFG->prefix}user u, {$CFG->prefix}game_grades g, {$CFG->prefix}game_attempts a
WHERE u.id = g.userid AND g.gameid = {$game->id} AND a.gameid = g.gameid AND u.id = a.userid
$user
GROUP BY u.id, g.score, g.timemodified";
return get_records_sql($sql);
}
/**
* Must return an array of user records (all data) who are participants
* for a given instance of game. Must include every user involved
* in the instance, independient of his role (student, teacher, admin...)
* See other modules as example.
*
* @param int $gameid ID of an instance of this module
* @return mixed boolean/array of students
**/
function game_get_participants($gameid) {
return false; //todo
}
/**
* This function returns if a scale is being used by one game
* it it has support for grading and scales. Commented code should be
* modified if necessary. See forum, glossary or journal modules
* as reference.
*
* @param int $gameid ID of an instance of this module
* @return mixed
* @todo Finish documenting this function
**/
function game_scale_used ($gameid,$scaleid) {
$return = false;
//$rec = get_record("game","id","$gameid","scale","-$scaleid");
//
//if (!empty($rec) && !empty($scaleid)) {
// $return = true;
//}
return $return;
}
/**
* Update grades in central gradebook
*
* @param object $game null means all games
* @param int $userid specific user only, 0 mean all
*/
function game_update_grades($game=null, $userid=0, $nullifnone=true) {
global $CFG;
if (!function_exists('grade_update')) { //workaround for buggy PHP versions
if( file_exists( $CFG->libdir.'/gradelib.php')){
require_once($CFG->libdir.'/gradelib.php');
}else{
return;
}
}
if ($game != null) {
if ($grades = game_get_user_grades($game, $userid)) {
game_grade_item_update($game, $grades);
} else if ($userid and $nullifnone) {
$grade = new object();
$grade->userid = $userid;
$grade->rawgrade = NULL;
game_grade_item_update( $game, $grade);
} else {
game_grade_item_update( $game);
}
} else {
$sql = "SELECT a.*, cm.idnumber as cmidnumber, a.course as courseid
FROM {$CFG->prefix}game a, {$CFG->prefix}course_modules cm, {$CFG->prefix}modules m
WHERE m.name='game' AND m.id=cm.module AND cm.instance=a.id";
if ($rs = get_recordset_sql($sql)) {
while ($game = rs_fetch_next_record( $rs)) {
if ($game->grade != 0) {
game_update_grades( $game, 0, false);
} else {
game_grade_item_update( $game);
}
}
rs_close( $rs);
}
}
}
/**
* Create grade item for given game
*
* @param object $game object with extra cmidnumber
* @param mixed optional array/object of grade(s); 'reset' means reset grades in gradebook
* @return int 0 if ok, error code otherwise
*/
function game_grade_item_update($game, $grades=NULL) {
global $CFG;
if (!function_exists('grade_update')) { //workaround for buggy PHP versions
if( file_exists( $CFG->libdir.'/gradelib.php')){
require_once($CFG->libdir.'/gradelib.php');
}else{
return;
}
}
if (array_key_exists('cmidnumber', $game)) { //it may not be always present
$params = array('itemname'=>$game->name, 'idnumber'=>$game->cmidnumber);
} else {
$params = array('itemname'=>$game->name);
}
if ($game->grade > 0) {
$params['gradetype'] = GRADE_TYPE_VALUE;
$params['grademax'] = $game->grade;
$params['grademin'] = 0;
} else {
$params['gradetype'] = GRADE_TYPE_NONE;
}
if ($grades === 'reset') {
$params['reset'] = true;
$grades = NULL;
}
return grade_update('mod/game', $game->course, 'mod', 'game', $game->id, 0, $grades, $params);
}
/**
* Delete grade item for given game
*
* @param object $game object
* @return object game
*/
function game_grade_item_delete( $game) {
global $CFG;
if( file_exists( $CFG->libdir.'/gradelib.php')){
require_once($CFG->libdir.'/gradelib.php');
}else{
return;
}
return grade_update('mod/game', $game->course, 'mod', 'game', $game->id, 0, NULL, array('deleted'=>1));
}
/**
* Returns all game graded users since a given time for specified game
*/
function game_get_recent_mod_activity(&$activities, &$index, $timestart, $courseid, $cmid, $userid=0, $groupid=0) {
global $CFG, $COURSE, $USER;
if ($COURSE->id == $courseid) {
$course = $COURSE;
} else {
$course = get_record('course', 'id', $courseid);
}
$modinfo =& get_fast_modinfo($course);
$cm = $modinfo->cms[$cmid];
if ($userid) {
$userselect = "AND u.id = $userid";
} else {
$userselect = "";
}
if ($groupid) {
$groupselect = "AND gm.groupid = $groupid";
$groupjoin = "JOIN {$CFG->prefix}groups_members gm ON gm.userid=u.id";
} else {
$groupselect = "";
$groupjoin = "";
}
if (!$attempts = get_records_sql("SELECT qa.*, q.grade,
u.firstname, u.lastname, u.email, u.picture
FROM {$CFG->prefix}game_attempts qa
JOIN {$CFG->prefix}game q ON q.id = qa.gameid
JOIN {$CFG->prefix}user u ON u.id = qa.userid
$groupjoin
WHERE qa.timefinish > $timestart AND q.id = $cm->instance
$userselect $groupselect
ORDER BY qa.timefinish ASC")) {
return;
}
$cm_context = get_context_instance(CONTEXT_MODULE, $cm->id);
$grader = has_capability('moodle/grade:viewall', $cm_context);
$accessallgroups = has_capability('moodle/site:accessallgroups', $cm_context);
$viewfullnames = has_capability('moodle/site:viewfullnames', $cm_context);
//$grader = has_capability('mod/game:grade', $cm_context);
$grader = isteacher( $courseid, $userid);
$groupmode = groups_get_activity_groupmode($cm, $course);
if (is_null($modinfo->groups)) {
$modinfo->groups = groups_get_user_groups($course->id); // load all my groups and cache it in modinfo
}
$aname = format_string($cm->name,true);
foreach ($attempts as $attempt) {
if ($attempt->userid != $USER->id) {
if (!$grader) {
// grade permission required
continue;
}
if ($groupmode == SEPARATEGROUPS and !$accessallgroups) {
$usersgroups = groups_get_all_groups($course->id, $attempt->userid, $cm->groupingid);
if (!is_array($usersgroups)) {
continue;
}
$usersgroups = array_keys($usersgroups);
$interset = array_intersect($usersgroups, $modinfo->groups[$cm->id]);
if (empty($intersect)) {
continue;
}
}
}
$tmpactivity = new object();
$tmpactivity->type = 'game';
$tmpactivity->cmid = $cm->id;
$tmpactivity->name = $aname;
$tmpactivity->sectionnum= $cm->sectionnum;
$tmpactivity->timestamp = $attempt->timefinish;
$tmpactivity->content->attemptid = $attempt->id;
$tmpactivity->content->sumgrades = $attempt->score * $attempt->grade;
$tmpactivity->content->maxgrade = $attempt->grade;
$tmpactivity->content->attempt = $attempt->attempt;
$tmpactivity->user->userid = $attempt->userid;
$tmpactivity->user->fullname = fullname($attempt, $viewfullnames);
$tmpactivity->user->picture = $attempt->picture;
$activities[$index++] = $tmpactivity;
}
return;
}
function game_print_recent_mod_activity($activity, $courseid, $detail, $modnames) {
global $CFG;
echo '<table border="0" cellpadding="3" cellspacing="0" class="forum-recent">';
echo "<tr><td class=\"userpicture\" valign=\"top\">";
print_user_picture($activity->user->userid, $courseid, $activity->user->picture);
echo "</td><td>";
if ($detail) {
$modname = $modnames[$activity->type];
echo '<div class="title">';
echo "<img src=\"$CFG->modpixpath/{$activity->type}/icon.gif\" ".
"class=\"icon\" alt=\"$modname\" />";
echo "<a href=\"$CFG->wwwroot/mod/game/view.php?id={$activity->cmid}\">{$activity->name}</a>";
echo '</div>';
}
echo '<div class="grade">';
echo get_string("attempt", "game")." {$activity->content->attempt}: ";
$grades = "({$activity->content->sumgrades} / {$activity->content->maxgrade})";
echo "<a href=\"$CFG->wwwroot/mod/game/review.php?attempt={$activity->content->attemptid}\">$grades</a>";
echo '</div>';
echo '<div class="user">';
echo "<a href=\"$CFG->wwwroot/user/view.php?id={$activity->user->userid}&amp;course=$courseid\">"
."{$activity->user->fullname}</a> - ".userdate($activity->timestamp);
echo '</div>';
echo "</td></tr></table>";
return;
}
function game_before_add_or_update(&$game) {
$pos = strpos( $game->questioncategoryid, ',');
if( $pos != false)
$game->questioncategoryid = substr( $game->questioncategoryid, 0, $pos);
if( $game->gamekind == 'millionaire')
{
if( substr( $game->param8, 0, 1) == '#')
{
$game->param8 = hexdec(substr( $game->param8, 1));
}
}else if( $game->gamekind == 'snakes')
{
$s = '';
if( $game->param3 == 0)
{
if( isset( $_POST[ 'snakes_cols']))
{
$fields = array( 'snakes_board', 'snakes_cols', 'snakes_rows', 'snakes_headerx', 'snakes_headery', 'snakes_footerx', 'snakes_footery');
foreach( $fields as $f)
$s .= '#'.$f.':'.$_POST[ $f];
$s = substr( $s, 1);
}
}
$game->param9 = $s;
}
}
/**
* This function is called at the end of game_add_instance
* and game_update_instance, to do the common processing.
*
* @param object $game the game object.
*/
function game_after_add_or_update($game) {
if( $game->gamekind == 'snakes')
{
game_snakes_savefile( $game);
}
//update related grade item
game_grade_item_update( stripslashes_recursive( $game));
}
function game_file_area_name( $game) {
global $CFG;
// Creates a directory file name, suitable for make_upload_directory()
return "$CFG->dataroot/$game->course/$CFG->moddata/game/$game->id";
}
function game_snakes_savefile( &$game)
{
$filename = basename( $_FILES['param4']['name']);
if( $filename == '')
{
$game->param4 = 0;
return true;
}
$target_path = game_file_area_name( $game);
if( !check_dir_exists( $target_path, true, true))
{
$game->param4 = 0;
return false;
}
game_snakes_removefile( $target_path, 'board');
$pos = strrpos( $filename, '.');
if( $pos == false)
{
$game->param4 = 0;
return false;
}
$filename = 'file'.substr( $filename, $pos);
game_snakes_removefile( $target_path, 'file');
$target_path = $target_path . '/'.$filename;
if( move_uploaded_file($_FILES['param4']['tmp_name'], $target_path)) {
$game->param4 = 1;
return true;
} else{
$game->param4 = 0;
return false;
}
}
//remove all files that start with name $file
function game_snakes_removefile( $target_path, $file)
{
$d = dir( $target_path);
while (false !== ($entry = $d->read())) {
if( substr( $entry, 0, strlen( $file)) != $file)
continue;
unlink( $target_path.'/'.$entry);
}
$d->close();
}
/**
* Removes all grades from gradebook
* @param int $courseid
* @param string optional type
*/
function game_reset_gradebook($courseid, $type='') {
global $CFG;
$sql = "SELECT q.*, cm.idnumber as cmidnumber, q.course as courseid
FROM {$CFG->prefix}game q, {$CFG->prefix}course_modules cm, {$CFG->prefix}modules m
WHERE m.name='game' AND m.id=cm.module AND cm.instance=q.id AND q.course=$courseid";
if ($games = get_records_sql( $sql)) {
foreach ($games as $game) {
game_grade_item_update( $game, 'reset');
}
}
}
/**
* Returns an array of game type objects to construct
* menu list when adding new game
*
*/
function game_get_types(){
global $CFG;
$types = array();
$type = new object();
$type->modclass = MOD_CLASS_ACTIVITY;
$type->type = "game_group_start";
$type->typestr = '--'.get_string( 'modulenameplural', 'game');
$types[] = $type;
$type = new object();
$type->modclass = MOD_CLASS_ACTIVITY;
$type->type = "game&amp;type=hangman";
$type->typestr = get_string('game_hangman', 'game');
$types[] = $type;
$type = new object();
$type->modclass = MOD_CLASS_ACTIVITY;
$type->type = "game&amp;type=contest";
$type->typestr = get_string('game_contest', 'game');
$types[] = $type;
$type = new object();
$type->modclass = MOD_CLASS_ACTIVITY;
$type->type = "game&amp;type=cross";
$type->typestr = get_string('game_cross', 'game');
$types[] = $type;
$type = new object();
$type->modclass = MOD_CLASS_ACTIVITY;
$type->type = "game&amp;type=cryptex";
$type->typestr = get_string('game_cryptex', 'game');
$types[] = $type;
$type = new object();
$type->modclass = MOD_CLASS_ACTIVITY;
$type->type = "game&amp;type=hiddenpicture";
$type->typestr = get_string('game_hiddenpicture', 'game');
$types[] = $type;
$type = new object();
$type->modclass = MOD_CLASS_ACTIVITY;
$type->type = "game&amp;type=millionaire";
$type->typestr = get_string('game_millionaire', 'game');
$types[] = $type;
$type = new object();
$type->modclass = MOD_CLASS_ACTIVITY;
$type->type = "game&amp;type=snakes";
$type->typestr = get_string('game_snakes', 'game');
$types[] = $type;
$type = new object();
$type->modclass = MOD_CLASS_ACTIVITY;
$type->type = "game&amp;type=sudoku";
$type->typestr = get_string('game_sudoku', 'game');
$types[] = $type;
if(get_record_select( 'modules', "name='book'", 'id,id')){
$type = new object();
$type->modclass = MOD_CLASS_ACTIVITY;
$type->type = "game&amp;type=bookquiz";
$type->typestr = get_string('game_bookquiz', 'game');
$types[] = $type;
}
$type = new object();
$type->modclass = MOD_CLASS_ACTIVITY;
$type->type = "game_group_end";
$type->typestr = '--';
$types[] = $type;
return $types;
}
/**
* Return a textual summary of the number of attemtps that have been made at a particular game,
* returns '' if no attemtps have been made yet, unless $returnzero is passed as true.
* @param object $game the game object. Only $game->id is used at the moment.
* @param object $cm the cm object. Only $cm->course, $cm->groupmode and $cm->groupingid fields are used at the moment.
* @param boolean $returnzero if false (default), when no attempts have been made '' is returned instead of 'Attempts: 0'.
* @param int $currentgroup if there is a concept of current group where this method is being called
* (e.g. a report) pass it in here. Default 0 which means no current group.
* @return string a string like "Attempts: 123", "Attemtps 123 (45 from your groups)" or
* "Attemtps 123 (45 from this group)".
*/
function game_num_attempt_summary($game, $cm, $returnzero = false, $currentgroup = 0) {
global $CFG, $USER;
$numattempts = count_records('game_attempts', 'gameid', $game->id, 'preview', 0);
if ($numattempts || $returnzero) {
if (groups_get_activity_groupmode($cm)) {
$a->total = $numattempts;
if ($currentgroup) {
$a->group = count_records_sql('SELECT count(1) FROM ' .
$CFG->prefix . 'game_attempts qa JOIN ' .
$CFG->prefix . 'groups_members gm ON qa.userid = gm.userid ' .
'WHERE gameid = ' . $game->id . ' AND preview = 0 AND groupid = ' . $currentgroup);
return get_string('attemptsnumthisgroup', 'quiz', $a);
} else if ($groups = groups_get_all_groups($cm->course, $USER->id, $cm->groupingid)) {
$a->group = count_records_sql('SELECT count(1) FROM ' .
$CFG->prefix . 'game_attempts qa JOIN ' .
$CFG->prefix . 'groups_members gm ON qa.userid = gm.userid ' .
'WHERE gameid = ' . $game->id . ' AND preview = 0 AND ' .
'groupid IN (' . implode(',', array_keys($groups)) . ')');
return get_string('attemptsnumyourgroups', 'quiz', $a);
}
}
return get_string('attemptsnum', 'quiz', $numattempts);
}
return '';
}
/**
* Implementation of the function for printing the form elements that control
* whether the course reset functionality affects the Game.
* @param object $mform form passed by reference
*/
function game_reset_course_form_definition(&$mform) {
$mform->addElement('header', 'gameheader', get_string('modulenameplural', 'game'));
$mform->addElement('checkbox', 'reset_game_all', get_string('reset_game_all','game'));
$mform->addElement('checkbox', 'reset_game_deleted_course', get_string('reset_game_deleted_course', 'game'));
}
/**
* Course reset form defaults.
* @return array
*/
function game_reset_course_form_defaults($course) {
return array('reset_game_all'=>0, 'reset_game_deleted_course' => 0);
}
/**
* Actual implementation of the reset course functionality, delete all the
* Game responses for course $data->courseid.
*
* @global object
* @param $data the data submitted from the reset course.
* @return array status array
*/
function game_reset_userdata($data) {
global $CFG;
$componentstr = get_string('modulenameplural', 'game');
$status = array();
for($i=1; $i <= 2; $i++){
if( $i == 1){
if (empty($data->reset_game_all))
continue;
$allgamessql = "SELECT g.id FROM {$CFG->prefix}game g WHERE g.course = ".$data->courseid;
$allattemptssql = "SELECT ga.id FROM {$CFG->prefix}game g LEFT JOIN {$CFG->prefix}game_attempts ga ON g.id = ga.gameid WHERE g.course = ".$data->courseid;
$newstatus = array('component'=>$componentstr, 'item'=>get_string('reset_game_all', 'game'), 'error'=>false);
}else if( $i == 2)
{
//Delete data of deleted courses
if (empty($data->reset_game_deleted_course))
continue;
$allgamessql = "SELECT g.id FROM {$CFG->prefix}game g WHERE NOT EXISTS( SELECT * FROM {$CFG->prefix}course c WHERE c.id = g.course)";
$allattemptssql = "SELECT ga.id FROM {$CFG->prefix}game_attempts ga WHERE NOT EXISTS( SELECT * FROM {$CFG->prefix}game g WHERE ga.gameid = g.id)";
$newstatus = array('component'=>$componentstr, 'item'=>get_string('reset_game_deleted_course', 'game'), 'error'=>false);
}
$recs = get_recordset_sql($allgamessql);
if ($recs != false) {
foreach ($recs as $rec) {
$game = get_record_select( 'game', 'id='.$rec[ 'id'], 'id,name,course');
remove_dir( $CFG->dataroot.'/'.$game->course.'/moddata/game/'.$game->id);
//reset grades
$grades = NULL;
$params = array('itemname'=>$game->name, 'idnumber'=>0);
$params['reset'] = true;
grade_update('mod/game', $game->course, 'mod', 'game', $game->id, 0, $grades, $params);
}
}
delete_records_select('game_bookquiz', "id IN ($allgamessql)");
delete_records_select('game_bookquiz_chapters', "attemptid IN ($allattemptssql)");
delete_records_select('game_bookquiz_questions', "gameid IN ($allgamessql)");
delete_records_select('game_cross', "id IN ($allgamessql)");
delete_records_select('game_cryptex', "id IN ($allgamessql)");
delete_records_select('game_export_html', "id IN ($allgamessql)");
delete_records_select('game_export_javame', "id IN ($allgamessql)");
delete_records_select('game_grades', "gameid IN ($allgamessql)");
delete_records_select('game_hangman', "id IN ($allgamessql)");
delete_records_select('game_hiddenpicture', "id IN ($allgamessql)");
delete_records_select('game_millionaire', "id IN ($allgamessql)");
delete_records_select('game_queries', "gameid IN ($allgamessql)");
delete_records_select('game_repetitions', "gameid IN ($allgamessql)");
delete_records_select('game_snakes', "id IN ($allgamessql)");
delete_records_select('game_sudoku', "id IN ($allgamessql)");
if( $i == 2)
delete_records_select('game_attempts', "NOT EXISTS (SELECT * FROM {$CFG->prefix}game g WHERE {$CFG->prefix}game_attempts.gameid=g.id)");
else
delete_records_select('game_attempts', "gameid IN ($allgamessql)");
$status[] = $newstatus;
}
if (empty($data->reset_game_deleted_course))
return $status;
//Delete data from deleted games
$a = array( 'bookquiz', 'cross', 'cryptex', 'grades', 'bookquiz_questions', 'export_html', 'export_javame', 'hangman',
'hiddenpicture', 'millionaire', 'snakes', 'sudoku');
foreach( $a as $table)
delete_records_select( 'game_'.$table, "NOT EXISTS( SELECT * FROM {$CFG->prefix}game g WHERE {$CFG->prefix}game_$table.id=g.id)");
//Tables that have the field gameid
$a = array( 'grades', 'queries', 'repetitions');
foreach( $a as $table)
delete_records_select( 'game_'.$table, "NOT EXISTS( SELECT * FROM {$CFG->prefix}game g WHERE {$CFG->prefix}game_$table.gameid=g.id)");
//Tables that have the key attemptid
$a = array( 'bookquiz_chapters');
foreach( $a as $table)
delete_records_select( 'game_'.$table, "NOT EXISTS( SELECT * FROM {$CFG->prefix}game_attempts ga WHERE {$CFG->prefix}game_$table.attemptid=ga.id)");
return $status;
}
function game_file_area_query_name( $game, $query) {
return game_file_area_name( $game).'/queries/'.$query->id;
}