<?php

require_once(dirname(dirname(dirname(__FILE__))).'/config.php');
require_once(dirname(__FILE__).'/lib.php');

$id  = required_param('id', PARAM_INT);   //moduleid

if ($id) {
    $cm     = get_coursemodule_from_id('sqlbox', $id, 0, false, MUST_EXIST);
    $course = $DB->get_record('course', array('id' => $cm->course), '*', MUST_EXIST);
    $sqlbox = $DB->get_record('sqlbox', array('id' => $cm->instance), '*', MUST_EXIST);
} else {
    print_error('invalidcourse');
}

require_login($course, true, $cm);

$context = get_context_instance(CONTEXT_MODULE, $cm->id);
require_capability('mod/sqlbox:readqueries', $context);

add_to_log($course->id, 'sqlbox', 'report', "reportall.php?id={$cm->id}", $sqlbox->name, $cm->id);

$PAGE->set_url('/mod/sqlbox/reportall.php', array('id' => $cm->id));
$PAGE->set_title("Results for all SQLBoxes");
$PAGE->set_heading(format_string($course->fullname));
$PAGE->set_context($context);

echo $OUTPUT->header();

$boxes = $DB->get_records_sql("SELECT * FROM {sqlbox} ORDER BY id");
$b = array();
foreach ($boxes as $box)
    $b[$box->id] = $box->name;

$table = new html_table;
$table->head = array_merge(array("Nutzer"), $b);
$table->align = array_merge(array("left"), array_fill(0, count($b), 'center'));

$users = $DB->get_records("user");
foreach ($users as $user) {
    if (isguestuser($user))
        continue;

    $name = $user->firstname.' '.$user->lastname;

    $solutions = $DB->get_records_sql("SELECT s.id, sol.correct
        FROM {sqlbox} s LEFT JOIN (
            SELECT sqlboxid,correct FROM {sqlbox_solutions} WHERE userid=:id) as sol
            ON s.id = sol.sqlboxid ORDER BY s.id",
            array('id'=>$user->id));
    $s = array();
    foreach ($solutions as $solution)
        $s[$solution->id] = ($solution->correct == '1') ? '☑' : ($solution->correct == '0' ? '☒' : '☐');

    $table->data[] = array_merge(array($name), $s);
}

echo html_writer::table($table);

echo $OUTPUT->footer();

?>