<?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/>.

/**
 * The gradebook user report
 *
 * @package   gradereport_user
 * @copyright 2007 Moodle Pty Ltd (http://moodle.com)
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

require_once '../../../config.php';
require_once $CFG->libdir.'/gradelib.php';
require_once $CFG->dirroot.'/grade/lib.php';
require_once $CFG->dirroot.'/grade/report/user/lib.php';

$courseid = required_param('id', PARAM_INT);

< $userid   = optional_param('userid', $USER->id, PARAM_INT);



> $userid   = optional_param('userid', null, PARAM_INT);


$userview = optional_param('userview', 0, PARAM_INT);


< $PAGE->set_url(new moodle_url('/grade/report/user/index.php', array('id'=>$courseid)));



> $PAGE->set_url(new moodle_url('/grade/report/user/index.php', ['id' => $courseid]));



if ($userview == 0) {
    $userview = get_user_preferences('gradereport_user_view_user', GRADE_REPORT_USER_VIEW_USER);
} else {
    set_user_preference('gradereport_user_view_user', $userview);
}


< /// basic access checks
< if (!$course = $DB->get_record('course', array('id' => $courseid))) {
<     print_error('invalidcourseid');



> // Basic access checks.
> if (!$course = $DB->get_record('course', ['id' => $courseid])) {
>     throw new \moodle_exception('invalidcourseid');


}
require_login($course);
$PAGE->set_pagelayout('report');

$context = context_course::instance($course->id);
require_capability('gradereport/user:view', $context);


< if (empty($userid)) {



> if ($userid === 0) {


    require_capability('moodle/grade:viewall', $context);

< 
< } else {
<     if (!$DB->get_record('user', array('id'=>$userid, 'deleted'=>0)) or isguestuser($userid)) {
<         print_error('invaliduser');



> } else if ($userid) {
>     if (!$DB->get_record('user', ['id' => $userid, 'deleted' => 0]) || isguestuser($userid)) {
>         throw new \moodle_exception('invaliduser');


    }
}

$access = false;
if (has_capability('moodle/grade:viewall', $context)) {

<     //ok - can view all course grades



>     // User can view all course grades.


    $access = true;

< 
< } else if ($userid == $USER->id and has_capability('moodle/grade:view', $context) and $course->showgrades) {
<     //ok - can view own grades



> } else if (($userid == $USER->id || is_null($userid)) && has_capability('moodle/grade:view', $context) && $course->showgrades) {
>     // User can view own grades.


    $access = true;

< 
< } else if (has_capability('moodle/grade:viewall', context_user::instance($userid)) and $course->showgrades) {
<     // ok - can view grades of this user- parent most probably



> } else if (has_capability('moodle/grade:viewall', context_user::instance($userid)) && $course->showgrades) {
>     // User can view grades of this user, The user is an parent most probably.


    $access = true;
}

if (!$access) {

<     // no access to grades!
<     print_error('nopermissiontoviewgrades', 'error',  $CFG->wwwroot.'/course/view.php?id='.$courseid);



>     // The user has no access to grades.
>     throw new \moodle_exception('nopermissiontoviewgrades', 'error',  $CFG->wwwroot.'/course/view.php?id='.$courseid);


}


< /// return tracking object
< $gpr = new grade_plugin_return(array('type'=>'report', 'plugin'=>'user', 'courseid'=>$courseid, 'userid'=>$userid));



> // Initialise the grade tracking object.
> $gpr = new grade_plugin_return(['type' => 'report', 'plugin' => 'user', 'courseid' => $courseid, 'userid' => $userid]);




< /// last selected report session tracking



> // Infer the users previously selected report via session tracking.


if (!isset($USER->grade_last_report)) {

<     $USER->grade_last_report = array();



>     $USER->grade_last_report = [];


}
$USER->grade_last_report[$course->id] = 'user';

// First make sure we have proper final grades.
grade_regrade_final_grades_if_required($course);


< if (has_capability('moodle/grade:viewall', $context)) { //Teachers will see all student reports
<     $groupmode    = groups_get_course_groupmode($course);   // Groups are being used



> $gradesrenderer = $PAGE->get_renderer('core_grades');
> 
> // Teachers will see all student reports.
> if (has_capability('moodle/grade:viewall', $context)) {
>     // Verify if we are using groups or not.
>     $groupmode = groups_get_course_groupmode($course);


    $currentgroup = $gpr->groupid;


<     if (!$currentgroup) {      // To make some other functions work better later
<         $currentgroup = NULL;



>     // To make some other functions work better later.
>     if (!$currentgroup) {
>         $currentgroup = null;


    }


<     $isseparategroups = ($course->groupmode == SEPARATEGROUPS and !has_capability('moodle/site:accessallgroups', $context));



>     $isseparategroups = ($course->groupmode == SEPARATEGROUPS && !has_capability('moodle/site:accessallgroups', $context));




<     if ($isseparategroups and (!$currentgroup)) {
<         // no separate group access, can view only self



>     if ($isseparategroups && (!$currentgroup)) {
>         // No separate group access, The user can view only themselves.


        $userid = $USER->id;

<         $user_selector = false;
<     } else {
<         $user_selector = true;



>     }
> 
>     // If there is a stored (last viewed) user in a session variable, bypass the user select zero state and display the
>     // report for that user.
>     $lastvieweduserid = $SESSION->gradereport_user["useritem-{$context->id}"] ?? null;
>     if (is_null($userid) && !is_null($lastvieweduserid)) {
>         $userid = $lastvieweduserid;
>     }
> 
>     $gradableusers = grade_report::get_gradable_users($courseid, $currentgroup);
>     // Validate whether the requested user is a valid gradable user in this course. If, not display the user select
>     // zero state.
>     if (empty($gradableusers) || ($userid && !array_key_exists($userid, $gradableusers))) {
>         $userid = null;


    }

    $defaultgradeshowactiveenrol = !empty($CFG->grade_report_showonlyactiveenrol);
    $showonlyactiveenrol = get_user_preferences('grade_report_showonlyactiveenrol', $defaultgradeshowactiveenrol);
    $showonlyactiveenrol = $showonlyactiveenrol || !has_capability('moodle/course:viewsuspendedusers', $context);


<     $renderer = $PAGE->get_renderer('gradereport_user');
< 


    if ($userview == GRADE_REPORT_USER_VIEW_USER) {
        $viewasuser = true;
    } else {
        $viewasuser = false;
    }


<     if (empty($userid)) {


        $gui = new graded_users_iterator($course, null, $currentgroup);
        $gui->require_active_enrolment($showonlyactiveenrol);
        $gui->init();

<         // Add tabs
<         print_grade_page_head($courseid, 'report', 'user');
<         groups_print_course_menu($course, $gpr->get_return_url('index.php?id='.$courseid, array('userid'=>0)));




<         if ($user_selector) {
<             echo $renderer->graded_users_selector('user', $course, $userid, $currentgroup, true);
<         }
< 
<         echo $renderer->view_user_selector($userid, $userview);



>     if (is_null($userid)) { // Zero state.
>         $actionbar = new \gradereport_user\output\action_bar($context, $userview, null, $currentgroup);
>         // Print header.
>         print_grade_page_head($courseid, 'report', 'user', ' ', false, null, true,
>             null, null, null, $actionbar);
> 
>         if (empty($gradableusers)) { // There are no available gradable users, display a notification.
>             $message = $currentgroup ? get_string('nostudentsingroup') : get_string('nostudentsyet');
>             echo $OUTPUT->notification($message, 'warning', false);
>         } else { // Otherwise, display the zero state template.
>             $report = new gradereport_user\report\user($courseid, $gpr, $context, $USER->id, $viewasuser);
>             echo $report->output_report_zerostate();
>         }
>     } else if ($userid == 0) { // Show all reports.
>         // Store the id of the current user item in a session variable which represents the last viewed item.
>         $SESSION->gradereport_user["useritem-{$context->id}"] = $userid;
> 
>         $actionbar = new \gradereport_user\output\action_bar($context, $userview, 0, $currentgroup);
>         print_grade_page_head($courseid, 'report', 'user', ' ', false, null, true,
>             null, null, null, $actionbar);



        while ($userdata = $gui->next_user()) {
            $user = $userdata->user;

<             $report = new grade_report_user($courseid, $gpr, $context, $user->id, $viewasuser);



>             $report = new gradereport_user\report\user($courseid, $gpr, $context, $user->id, $viewasuser);
>             $userheading = $gradesrenderer->user_heading($report->user, $courseid, false);




<             $studentnamelink = html_writer::link(new moodle_url('/user/view.php', array('id' => $report->user->id, 'course' => $courseid)), fullname($report->user));
<             echo $OUTPUT->heading($studentnamelink);



>             echo $userheading;



            if ($report->fill_table()) {

<                 echo '<br />'.$report->print_table(true);



>                 echo $report->print_table(true);


            }

<             echo "<p style = 'page-break-after: always;'></p>";


        }
        $gui->close();

<     } else { // Only show one user's report
<         $report = new grade_report_user($courseid, $gpr, $context, $userid, $viewasuser);
< 
<         $studentnamelink = html_writer::link(new moodle_url('/user/view.php', array('id' => $report->user->id, 'course' => $courseid)), fullname($report->user));
<         print_grade_page_head($courseid, 'report', 'user', get_string('pluginname', 'gradereport_user') . ' - ' . $studentnamelink,
<                 false, false, true, null, null, $report->user);



>     } else { // Show one user's report.
>         // Store the id of the current user item in a session variable which represents the last viewed item.
>         $SESSION->gradereport_user["useritem-{$context->id}"] = $userid;




<         groups_print_course_menu($course, $gpr->get_return_url('index.php?id='.$courseid, array('userid'=>0)));



>         $report = new gradereport_user\report\user($courseid, $gpr, $context, $userid, $viewasuser);
>         $actionbar = new \gradereport_user\output\action_bar($context, $userview, $report->user->id, $currentgroup);




<         if ($user_selector) {
<             $showallusersoptions = true;
<             echo $renderer->graded_users_selector('user', $course, $userid, $currentgroup, $showallusersoptions);
<         }
< 
<         echo $renderer->view_user_selector($userid, $userview);



>         print_grade_page_head($courseid, 'report', 'user', false, false, false, true, null, null, $report->user, $actionbar);




<         if ($currentgroup and !groups_is_member($currentgroup, $userid)) {



>         if ($currentgroup && !groups_is_member($currentgroup, $userid)) {


            echo $OUTPUT->notification(get_string('groupusernotmember', 'error'));
        } else {
            if ($report->fill_table()) {

<                 echo '<br />'.$report->print_table(true);



>                 echo $report->print_table(true);


            }
        }

>         $userreportrenderer = $PAGE->get_renderer('gradereport_user');
    }
>         // Add previous/next user navigation.
} else { //Students will see just their own report
>         echo $userreportrenderer->user_navigation($gui, $userid, $courseid);



< } else { //Students will see just their own report
< 
<     // Create a report instance
<     $report = new grade_report_user($courseid, $gpr, $context, $userid);



> } else {
>     // Students will see just their own report.
>     // Create a report instance.
>     $report = new gradereport_user\report\user($courseid, $gpr, $context, $userid ?? $USER->id);



<     // print the page
<     print_grade_page_head($courseid, 'report', 'user', get_string('pluginname', 'gradereport_user'). ' - '.fullname($report->user));



>     // Print the page.
>     print_grade_page_head($courseid, 'report', 'user', false, false, false, true, null, null, $report->user);



    if ($report->fill_table()) {

<         echo '<br />'.$report->print_table(true);



>         echo $report->print_table(true);


    }
}

if (isset($report)) {
    // Trigger report viewed event.
    $report->viewed();

< } else {
<     echo html_writer::tag('div', '', array('class' => 'clearfix'));
<     echo $OUTPUT->notification(get_string('nostudentsyet'));


}

echo $OUTPUT->footer();