/**
* Entry-point for the \ratingallocate object to call a solver
* @param \ratingallocate $ratingallocate
*/
public function distribute_users(\ratingallocate $ratingallocate)
{
// Extend PHP time limit
// core_php_time_limit::raise();
// Load data from database
$choicerecords = $ratingallocate->get_rateable_choices();
$ratings = $ratingallocate->get_ratings_for_rateable_choices();
// Randomize the order of the enrties to prevent advantages for early entry
shuffle($ratings);
$usercount = count($ratingallocate->get_raters_in_course());
$distributions = $this->compute_distribution($choicerecords, $ratings, $usercount);
$transaction = $ratingallocate->db->start_delegated_transaction();
// perform all allocation manipulation / inserts in one transaction
$ratingallocate->clear_all_allocations();
foreach ($distributions as $choiceid => $users) {
foreach ($users as $userid) {
$ratingallocate->add_allocation($choiceid, $userid, $ratingallocate->ratingallocate->id);
}
}
$transaction->allow_commit();
}
/**
* Shows table containing information about the users' ratings
* and their distribution over the choices (allocations).
*
* @return HTML code
*/
public function ratings_csv_for_ratingallocate(ratingallocate $ratingallocate, csv_export_writer $csvexport)
{
$exporttitle[0] = 'userid';
$exporttitle[1] = 'username';
$exporttitle[2] = 'firstname';
$exporttitle[3] = 'lastname';
$offsetchoices = count($exporttitle);
$columnids = array();
$rateable_choices = $ratingallocate->get_rateable_choices();
foreach ($rateable_choices as $choice) {
$columnids[$choice->id] = $choice->id + $offsetchoices;
$exporttitle[$choice->id + $offsetchoices] = $choice->id . '|' . $choice->title;
}
// Sort headings by (choice-)id to align them with exported data (created below).
ksort($exporttitle);
$maxcolumnid = key(array_slice($exporttitle, -1, 1, true));
$exporttitle[$maxcolumnid + 1] = "allocation";
$columnids["allocation"] = $maxcolumnid + 1;
// add the header to the data
$csvexport->add_data($exporttitle);
$ratingscells = array();
foreach ($ratingallocate->get_raters_in_course() as $user) {
if (!array_key_exists($user->id, $ratingscells)) {
$ratingscells[$user->id] = array();
}
$ratingscells[$user->id][0] = $user->id;
$ratingscells[$user->id][1] = $user->username;
$ratingscells[$user->id][2] = fullname($user);
$ratingscells[$user->id][3] = $user->lastname;
foreach ($columnids as $choice => $choicecolumn) {
$ratingscells[$user->id][$choicecolumn] = '';
}
// Sort ratings by choiceid to align them with the group names in the table
ksort($ratingscells[$user->id]);
}
$ratings = $ratingallocate->get_ratings_for_rateable_choices();
// get rating titles
$titles = $this->get_options_titles(array_map(function ($rating) {
return $rating->rating;
}, $ratings), $ratingallocate);
foreach ($ratings as $rating) {
$choicecolumnindex = $columnids[$rating->choiceid];
$ratingscells[$rating->userid][$choicecolumnindex] = $titles[$rating->rating];
}
$memberships = $ratingallocate->get_allocations();
$allocationcolumnindex = $columnids["allocation"];
foreach ($memberships as $membership) {
$choice = $rateable_choices[$membership->choiceid];
$ratingscells[$membership->userid][$allocationcolumnindex] = $choice->id . '|' . $choice->title;
}
foreach ($ratingscells as $userline) {
$csvexport->add_data($userline);
}
}
$this->print_csv_data();
exit;
}
/**
* Make sure that everything is closed when we are finished.
*/
public function __destruct()
{
fclose($this->fp);
// unlink ( $this->path );
}
}
global $DB;
$writer = new lp_export_write();
$writer->set_filename("lp_solve_export_course_" . $ratingallocate->id);
$choices = $ratingallocateobj->get_rateable_choices();
$ratings = $ratingallocateobj->get_ratings_for_rateable_choices();
$ratingscells = array();
foreach ($ratings as $rating) {
if (!array_key_exists($rating->userid, $ratingscells)) {
$ratingscells[$rating->userid] = array();
}
$ratingscells[$rating->userid][$rating->choiceid] = $rating->rating;
}
$zielfkt = 'max ';
// die zu maximierende Zielfunktion
$usernb = '';
// Stelle die NB pro User auf, dass er nur in eine Wahl kommt
$variablenerkl = '';
$nbkurs = array();
// nebenbedingungen pro Kurs