C:/xampp/htdocs/moodle/report/stats/lib.php

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<?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/>.

defined('MOODLE_INTERNAL') || die;

function report_stats_extend_navigation_course($navigation, $course, $context) {
    global $CFG;
    if (!empty($CFG->enablestats)) {
        return;
    }
    if (has_capability('report/stats:view', $context)) {
        $url = new moodle_url('/report/stats/index.php', array('course'=>$course->id));
        $navigation->add(get_string('pluginname', 'report_stats'), $url, navigation_node::TYPE_SETTING, null, null, new pix_icon('i/report', ''));
    }
}

function report_stats_extend_navigation_user($navigation, $user, $course) {
    global $CFG;
    if (!empty($CFG->enablestats)) {
        return;
    }
    if (report_stats_can_access_user_report($user, $course)) {
        $url = new moodle_url('/report/stats/user.php', array('id'=>$user->id, 'course'=>$course->id));
        $navigation->add(get_string('stats'), $url);
    }
}

function report_stats_can_access_user_report($user, $course) {
    global $USER;

    $coursecontext = context_course::instance($course->id);
    $personalcontext = context_user::instance($user->id);

    if (has_capability('report/stats:view', $coursecontext)) {
        return true;
    }

    if (has_capability('moodle/user:viewuseractivitiesreport', $personalcontext)) {
        if ($course->showreports and (is_viewing($coursecontext, $user) or is_enrolled($coursecontext, $user))) {
            return true;
        }

    } else if ($user->id == $USER->id) {
        if ($course->showreports and (is_viewing($coursecontext, $USER) or is_enrolled($coursecontext, $USER))) {
            return true;
        }
    }

    return false;
}

function report_stats_page_type_list($pagetype, $parentcontext, $currentcontext) {
    $array = array(
        '*'                  => get_string('page-x', 'pagetype'),
        'report-*'           => get_string('page-report-x', 'pagetype'),
        'report-stats-*'     => get_string('page-report-stats-x',  'report_stats'),
        'report-stats-index' => get_string('page-report-stats-index',  'report_stats'),
        'report-stats-user'  => get_string('page-report-stats-user',  'report_stats')
    );
    return $array;
}