<?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/>.

/**
 * This page prints a review of a particular quiz attempt
 *
 * It is used either by the student whose attempts this is, after the attempt,
 * or by a teacher reviewing another's attempt during or afterwards.
 *
 * @package   mod_quiz
 * @copyright 1999 onwards Martin Dougiamas  {@link http://moodle.com}
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

use mod_quiz\output\attempt_summary_information;
use mod_quiz\output\navigation_panel_review;
use mod_quiz\output\renderer;
use mod_quiz\quiz_attempt;

require_once(__DIR__ . '/../../config.php');
require_once($CFG->dirroot . '/mod/quiz/locallib.php');
require_once($CFG->dirroot . '/mod/quiz/report/reportlib.php');

$attemptid = required_param('attempt', PARAM_INT);
$page      = optional_param('page', 0, PARAM_INT);
$showall   = optional_param('showall', null, PARAM_BOOL);
$cmid      = optional_param('cmid', null, PARAM_INT);

$url = new moodle_url('/mod/quiz/review.php', ['attempt' => $attemptid]);
if ($page !== 0) {
    $url->param('page', $page);
} else if ($showall) {
    $url->param('showall', $showall);
}
$PAGE->set_url($url);
$PAGE->set_secondary_active_tab("modulepage");

$attemptobj = quiz_create_attempt_handling_errors($attemptid, $cmid);
$attemptobj->preload_all_attempt_step_users();
$page = $attemptobj->force_page_number_into_range($page);

// Now we can validate the params better, re-genrate the page URL.
if ($showall === null) {
    $showall = $page == 0 && $attemptobj->get_default_show_all('review');
}
$PAGE->set_url($attemptobj->review_url(null, $page, $showall));

// Check login.
require_login($attemptobj->get_course(), false, $attemptobj->get_cm());
$attemptobj->check_review_capability();

// Create an object to manage all the other (non-roles) access rules.
$accessmanager = $attemptobj->get_access_manager(time());
$accessmanager->setup_attempt_page($PAGE);

$options = $attemptobj->get_display_options(true);

// Check permissions - warning there is similar code in reviewquestion.php and
// quiz_attempt::check_file_access. If you change on, change them all.
if ($attemptobj->is_own_attempt()) {
    if (!$attemptobj->is_finished()) {
        redirect($attemptobj->attempt_url(null, $page));

    } else if (!$options->attempt) {
        $accessmanager->back_to_view_page($PAGE->get_renderer('mod_quiz'),
                $attemptobj->cannot_review_message());
    }

} else if (!$attemptobj->is_review_allowed()) {
    throw new moodle_exception('noreviewattempt', 'quiz', $attemptobj->view_url());
}

// Load the questions and states needed by this page.
if ($showall) {
    $questionids = $attemptobj->get_slots();
} else {
    $questionids = $attemptobj->get_slots($page);
}

// Save the flag states, if they are being changed.
if ($options->flags == question_display_options::EDITABLE && optional_param('savingflags', false,
        PARAM_BOOL)) {
    require_sesskey();
    $attemptobj->save_question_flags();
    redirect($attemptobj->review_url(null, $page, $showall));
}

// Work out appropriate title and whether blocks should be shown.
if ($attemptobj->is_own_preview()) {
    navigation_node::override_active_url($attemptobj->start_attempt_url());
    $attemptobj->update_questions_to_new_version_if_changed();

} else {
    if (empty($attemptobj->get_quiz()->showblocks) && !$attemptobj->is_preview_user()) {
        $PAGE->blocks->show_only_fake_blocks();
    }
}

// Set up the page header.
$headtags = $attemptobj->get_html_head_contributions($page, $showall);
$PAGE->set_title($attemptobj->review_page_title($page, $showall));
$PAGE->set_heading($attemptobj->get_course()->fullname);
$PAGE->activityheader->disable();

$summarydata = attempt_summary_information::create_for_attempt($attemptobj, $options, $page, $showall);

if ($showall) {
    $slots = $attemptobj->get_slots();
    $lastpage = true;
} else {
    $slots = $attemptobj->get_slots($page);
    $lastpage = $attemptobj->is_last_page($page);
}

/** @var renderer $output */
$output = $PAGE->get_renderer('mod_quiz');

// Arrange for the navigation to be displayed.
$navbc = $attemptobj->get_navigation_panel($output, navigation_panel_review::class, $page, $showall);
$regions = $PAGE->blocks->get_regions();
$PAGE->blocks->add_fake_block($navbc, reset($regions));

echo $output->review_page($attemptobj, $slots, $page, $showall, $lastpage, $options, $summarydata);

// Trigger an event for this review.
$attemptobj->fire_attempt_reviewed_event();
