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See Release Notes
Long Term Support Release

  • Bug fixes for general core bugs in 4.1.x will end 13 November 2023 (12 months).
  • Bug fixes for security issues in 4.1.x will end 10 November 2025 (36 months).
  • PHP version: minimum PHP 7.4.0 Note: minimum PHP version has increased since Moodle 4.0. PHP 8.0.x is supported too.
<?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 file contains functions used by the log reports
 *
 * This files lists the functions that are used during the log report generation.
 *
 * @package    report_log
 * @copyright  1999 onwards Martin Dougiamas (http://dougiamas.com)
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

defined('MOODLE_INTERNAL') || die;

if (!defined('REPORT_LOG_MAX_DISPLAY')) {
    define('REPORT_LOG_MAX_DISPLAY', 150); // days
}

require_once(__DIR__.'/lib.php');

/**
 * This function is used to generate and display the log activity graph
 *
 * @global stdClass $CFG
 * @param  stdClass $course course instance
 * @param  int|stdClass    $user id/object of the user whose logs are needed
 * @param  string $typeormode type of logs graph needed (usercourse.png/userday.png) or the mode (today, all).
 * @param  int $date timestamp in GMT (seconds since epoch)
 * @param  string $logreader Log reader.
 * @return void
 */
function report_log_print_graph($course, $user, $typeormode, $date=0, $logreader='') {
    global $CFG, $OUTPUT;

    if (!is_object($user)) {
        $user = core_user::get_user($user);
    }

    $logmanager = get_log_manager();
    $readers = $logmanager->get_readers();

    if (empty($logreader)) {
        $reader = reset($readers);
    } else {
        $reader = $readers[$logreader];
    }
    // If reader is not a sql_internal_table_reader and not legacy store then don't show graph.
    if (!($reader instanceof \core\log\sql_internal_table_reader) && !($reader instanceof logstore_legacy\log\store)) {
        return array();
    }
    $coursecontext = context_course::instance($course->id);

    $a = new stdClass();
    $a->coursename = format_string($course->shortname, true, array('context' => $coursecontext));
    $a->username = fullname($user, true);

    if ($typeormode == 'today' || $typeormode == 'userday.png') {
        $logs = report_log_usertoday_data($course, $user, $date, $logreader);
        $title = get_string("hitsoncoursetoday", "", $a);
    } else if ($typeormode == 'all' || $typeormode == 'usercourse.png') {
        $logs = report_log_userall_data($course, $user, $logreader);
        $title = get_string("hitsoncourse", "", $a);
    }

    if (!empty($CFG->preferlinegraphs)) {
        $chart = new \core\chart_line();
    } else {
        $chart = new \core\chart_bar();
    }

    $series = new \core\chart_series(get_string("hits"), $logs['series']);
    $chart->add_series($series);
    $chart->set_title($title);
    $chart->set_labels($logs['labels']);
    $yaxis = $chart->get_yaxis(0, true);
    $yaxis->set_label(get_string("hits"));
    $yaxis->set_stepsize(max(1, round(max($logs['series']) / 10)));

    echo $OUTPUT->render($chart);
}

/**
 * Select all log records for a given course and user
 *
 * @param int $userid The id of the user as found in the 'user' table.
 * @param int $courseid The id of the course as found in the 'course' table.
 * @param string $coursestart unix timestamp representing course start date and time.
 * @param string $logreader log reader to use.
 * @return array
 */
function report_log_usercourse($userid, $courseid, $coursestart, $logreader = '') {
    global $DB;

    $logmanager = get_log_manager();
    $readers = $logmanager->get_readers();
    if (empty($logreader)) {
        $reader = reset($readers);
    } else {
        $reader = $readers[$logreader];
    }

    // If reader is not a sql_internal_table_reader and not legacy store then return.
    if (!($reader instanceof \core\log\sql_internal_table_reader) && !($reader instanceof logstore_legacy\log\store)) {
        return array();
    }

    $coursestart = (int)$coursestart; // Note: unfortunately pg complains if you use name parameter or column alias in GROUP BY.
    if ($reader instanceof logstore_legacy\log\store) {
        $logtable = 'log';
        $timefield = 'time';
        $coursefield = 'course';
        // Anonymous actions are never logged in legacy log.
        $nonanonymous = '';
    } else {
        $logtable = $reader->get_internal_log_table_name();
        $timefield = 'timecreated';
        $coursefield = 'courseid';
        $nonanonymous = 'AND anonymous = 0';
    }

    $params = array();
    $courseselect = '';
    if ($courseid) {
        $courseselect = "AND $coursefield = :courseid";
        $params['courseid'] = $courseid;
    }
    $params['userid'] = $userid;
    return $DB->get_records_sql("SELECT FLOOR(($timefield - $coursestart)/" . DAYSECS . ") AS day, COUNT(*) AS num
                                   FROM {" . $logtable . "}
                                  WHERE userid = :userid
                                        AND $timefield > $coursestart $courseselect $nonanonymous
                               GROUP BY FLOOR(($timefield - $coursestart)/" . DAYSECS .")", $params);
}

/**
 * Select all log records for a given course, user, and day
 *
 * @param int $userid The id of the user as found in the 'user' table.
 * @param int $courseid The id of the course as found in the 'course' table.
 * @param string $daystart unix timestamp of the start of the day for which the logs needs to be retrived
 * @param string $logreader log reader to use.
 * @return array
 */
function report_log_userday($userid, $courseid, $daystart, $logreader = '') {
    global $DB;
    $logmanager = get_log_manager();
    $readers = $logmanager->get_readers();
    if (empty($logreader)) {
        $reader = reset($readers);
    } else {
        $reader = $readers[$logreader];
    }

    // If reader is not a sql_internal_table_reader and not legacy store then return.
    if (!($reader instanceof \core\log\sql_internal_table_reader) && !($reader instanceof logstore_legacy\log\store)) {
        return array();
    }

    $daystart = (int)$daystart; // Note: unfortunately pg complains if you use name parameter or column alias in GROUP BY.

    if ($reader instanceof logstore_legacy\log\store) {
        $logtable = 'log';
        $timefield = 'time';
        $coursefield = 'course';
        // Anonymous actions are never logged in legacy log.
        $nonanonymous = '';
    } else {
        $logtable = $reader->get_internal_log_table_name();
        $timefield = 'timecreated';
        $coursefield = 'courseid';
        $nonanonymous = 'AND anonymous = 0';
    }
    $params = array('userid' => $userid);

    $courseselect = '';
    if ($courseid) {
        $courseselect = "AND $coursefield = :courseid";
        $params['courseid'] = $courseid;
    }
    return $DB->get_records_sql("SELECT FLOOR(($timefield - $daystart)/" . HOURSECS . ") AS hour, COUNT(*) AS num
                                   FROM {" . $logtable . "}
                                  WHERE userid = :userid
                                        AND $timefield > $daystart $courseselect $nonanonymous
                               GROUP BY FLOOR(($timefield - $daystart)/" . HOURSECS . ") ", $params);
}

/**
 * This function is used to generate and display Mnet selector form
 *
 * @global stdClass $USER
 * @global stdClass $CFG
 * @global stdClass $SITE
 * @global moodle_database $DB
 * @global core_renderer $OUTPUT
 * @global stdClass $SESSION
 * @uses CONTEXT_SYSTEM
 * @uses COURSE_MAX_COURSES_PER_DROPDOWN
 * @uses CONTEXT_COURSE
 * @uses SEPARATEGROUPS
 * @param  int      $hostid host id
 * @param  stdClass $course course instance
 * @param  int      $selecteduser id of the selected user
 * @param  string   $selecteddate Date selected
 * @param  string   $modname course_module->id
 * @param  string   $modid number or 'site_errors'
 * @param  string   $modaction an action as recorded in the logs
 * @param  int      $selectedgroup Group to display
 * @param  int      $showcourses whether to show courses if we're over our limit.
 * @param  int      $showusers whether to show users if we're over our limit.
 * @param  string   $logformat Format of the logs (downloadascsv, showashtml, downloadasods, downloadasexcel)
 * @return void
 */
function report_log_print_mnet_selector_form($hostid, $course, $selecteduser=0, $selecteddate='today',
                                 $modname="", $modid=0, $modaction='', $selectedgroup=-1, $showcourses=0, $showusers=0, $logformat='showashtml') {

    global $USER, $CFG, $SITE, $DB, $OUTPUT, $SESSION;
    require_once $CFG->dirroot.'/mnet/peer.php';

    $mnet_peer = new mnet_peer();
    $mnet_peer->set_id($hostid);

    $sql = "SELECT DISTINCT course, hostid, coursename FROM {mnet_log}";
    $courses = $DB->get_records_sql($sql);
    $remotecoursecount = count($courses);

    // first check to see if we can override showcourses and showusers
    $numcourses = $remotecoursecount + $DB->count_records('course');
    if ($numcourses < COURSE_MAX_COURSES_PER_DROPDOWN && !$showcourses) {
        $showcourses = 1;
    }

    $sitecontext = context_system::instance();

    // Context for remote data is always SITE
    // Groups for remote data are always OFF
    if ($hostid == $CFG->mnet_localhost_id) {
        $context = context_course::instance($course->id);

        /// Setup for group handling.
        if ($course->groupmode == SEPARATEGROUPS and !has_capability('moodle/site:accessallgroups', $context)) {
            $selectedgroup = -1;
            $showgroups = false;
        } else if ($course->groupmode) {
            $showgroups = true;
        } else {
            $selectedgroup = 0;
            $showgroups = false;
        }

        if ($selectedgroup === -1) {
            if (isset($SESSION->currentgroup[$course->id])) {
                $selectedgroup =  $SESSION->currentgroup[$course->id];
            } else {
                $selectedgroup = groups_get_all_groups($course->id, $USER->id);
                if (is_array($selectedgroup)) {
                    $selectedgroup = array_shift(array_keys($selectedgroup));
                    $SESSION->currentgroup[$course->id] = $selectedgroup;
                } else {
                    $selectedgroup = 0;
                }
            }
        }

    } else {
        $context = $sitecontext;
    }

    // Get all the possible users
    $users = array();

    // Define limitfrom and limitnum for queries below
    // If $showusers is enabled... don't apply limitfrom and limitnum
    $limitfrom = empty($showusers) ? 0 : '';
    $limitnum  = empty($showusers) ? COURSE_MAX_USERS_PER_DROPDOWN + 1 : '';

    // If looking at a different host, we're interested in all our site users
    if ($hostid == $CFG->mnet_localhost_id && $course->id != SITEID) {
< $courseusers = get_enrolled_users($context, '', $selectedgroup, 'u.id, ' . get_all_user_name_fields(true, 'u'),
> $userfieldsapi = \core_user\fields::for_name(); > $courseusers = get_enrolled_users($context, '', $selectedgroup, 'u.id, ' . > $userfieldsapi->get_sql('u', false, '', '', false)->selects,
null, $limitfrom, $limitnum); } else { // this may be a lot of users :-(
< $courseusers = $DB->get_records('user', array('deleted'=>0), 'lastaccess DESC', 'id, ' . get_all_user_name_fields(true),
> $userfieldsapi = \core_user\fields::for_name(); > $courseusers = $DB->get_records('user', array('deleted' => 0), 'lastaccess DESC', 'id, ' . > $userfieldsapi->get_sql('', false, '', '', false)->selects,
$limitfrom, $limitnum); } if (count($courseusers) < COURSE_MAX_USERS_PER_DROPDOWN && !$showusers) { $showusers = 1; } if ($showusers) { if ($courseusers) { foreach ($courseusers as $courseuser) { $users[$courseuser->id] = fullname($courseuser, has_capability('moodle/site:viewfullnames', $context)); } } $users[$CFG->siteguest] = get_string('guestuser'); } // Get all the hosts that have log records $sql = "select distinct h.id, h.name from {mnet_host} h, {mnet_log} l where h.id = l.hostid order by h.name"; if ($hosts = $DB->get_records_sql($sql)) { foreach($hosts as $host) { $hostarray[$host->id] = $host->name; } } $hostarray[$CFG->mnet_localhost_id] = $SITE->fullname; asort($hostarray); $dropdown = array(); foreach($hostarray as $hostid => $name) { $courses = array(); $sites = array(); if ($CFG->mnet_localhost_id == $hostid) { if (has_capability('report/log:view', $sitecontext) && $showcourses) { if ($ccc = $DB->get_records("course", null, "fullname","id,shortname,fullname,category")) { foreach ($ccc as $cc) { if ($cc->id == SITEID) { $sites["$hostid/$cc->id"] = format_string($cc->fullname).' ('.get_string('site').')'; } else { $courses["$hostid/$cc->id"] = format_string(get_course_display_name_for_list($cc)); } } } } } else { if (has_capability('report/log:view', $sitecontext) && $showcourses) { $sql = "SELECT DISTINCT course, coursename FROM {mnet_log} where hostid = ?"; if ($ccc = $DB->get_records_sql($sql, array($hostid))) { foreach ($ccc as $cc) { if (1 == $cc->course) { // TODO: this might be wrong - site course may have another id $sites["$hostid/$cc->course"] = $cc->coursename.' ('.get_string('site').')'; } else { $courses["$hostid/$cc->course"] = $cc->coursename; } } } } } asort($courses); $dropdown[] = array($name=>($sites + $courses)); } $activities = array(); $selectedactivity = ""; $modinfo = get_fast_modinfo($course); if (!empty($modinfo->cms)) { $section = 0; $thissection = array(); foreach ($modinfo->cms as $cm) { // Exclude activities that aren't visible or have no view link (e.g. label). Account for folder being displayed inline. if (!$cm->uservisible || (!$cm->has_view() && strcmp($cm->modname, 'folder') !== 0)) { continue; } if ($cm->sectionnum > 0 and $section <> $cm->sectionnum) { $activities[] = $thissection; $thissection = array(); } $section = $cm->sectionnum; $modname = strip_tags($cm->get_formatted_name()); if (core_text::strlen($modname) > 55) { $modname = core_text::substr($modname, 0, 50)."..."; } if (!$cm->visible) { $modname = "(".$modname.")"; } $key = get_section_name($course, $cm->sectionnum); if (!isset($thissection[$key])) { $thissection[$key] = array(); } $thissection[$key][$cm->id] = $modname; if ($cm->id == $modid) { $selectedactivity = "$cm->id"; } } if (!empty($thissection)) { $activities[] = $thissection; } } if (has_capability('report/log:view', $sitecontext) && !$course->category) { $activities["site_errors"] = get_string("siteerrors"); if ($modid === "site_errors") { $selectedactivity = "site_errors"; } } $strftimedate = get_string("strftimedate"); $strftimedaydate = get_string("strftimedaydate"); asort($users); // Prepare the list of action options. $actions = array( 'view' => get_string('view'), 'add' => get_string('add'), 'update' => get_string('update'), 'delete' => get_string('delete'), '-view' => get_string('allchanges') ); // Get all the possible dates // Note that we are keeping track of real (GMT) time and user time // User time is only used in displays - all calcs and passing is GMT $timenow = time(); // GMT // What day is it now for the user, and when is midnight that day (in GMT). $timemidnight = $today = usergetmidnight($timenow); // Put today up the top of the list $dates = array( "0" => get_string('alldays'), "$timemidnight" => get_string("today").", ".userdate($timenow, $strftimedate) ); if (!$course->startdate or ($course->startdate > $timenow)) { $course->startdate = $course->timecreated; } $numdates = 1; while ($timemidnight > $course->startdate and $numdates < 365) { $timemidnight = $timemidnight - 86400; $timenow = $timenow - 86400; $dates["$timemidnight"] = userdate($timenow, $strftimedaydate); $numdates++; } if ($selecteddate === "today") { $selecteddate = $today; } echo "<form class=\"logselectform\" action=\"$CFG->wwwroot/report/log/index.php\" method=\"get\">\n"; echo "<div>\n";//invisible fieldset here breaks wrapping echo "<input type=\"hidden\" name=\"chooselog\" value=\"1\" />\n"; echo "<input type=\"hidden\" name=\"showusers\" value=\"$showusers\" />\n"; echo "<input type=\"hidden\" name=\"showcourses\" value=\"$showcourses\" />\n"; if (has_capability('report/log:view', $sitecontext) && $showcourses) { $cid = empty($course->id)? '1' : $course->id; echo html_writer::label(get_string('selectacoursesite'), 'menuhost_course', false, array('class' => 'accesshide')); echo html_writer::select($dropdown, "host_course", $hostid.'/'.$cid); } else { $courses = array(); $courses[$course->id] = get_course_display_name_for_list($course) . ((empty($course->category)) ? ' ('.get_string('site').') ' : ''); echo html_writer::label(get_string('selectacourse'), 'menuid', false, array('class' => 'accesshide')); echo html_writer::select($courses,"id",$course->id, false); if (has_capability('report/log:view', $sitecontext)) { $a = new stdClass(); $a->url = "$CFG->wwwroot/report/log/index.php?chooselog=0&group=$selectedgroup&user=$selecteduser" ."&id=$course->id&date=$selecteddate&modid=$selectedactivity&showcourses=1&showusers=$showusers"; print_string('logtoomanycourses','moodle',$a); } } if ($showgroups) { if ($cgroups = groups_get_all_groups($course->id)) { foreach ($cgroups as $cgroup) { $groups[$cgroup->id] = $cgroup->name; } } else { $groups = array(); } echo html_writer::label(get_string('selectagroup'), 'menugroup', false, array('class' => 'accesshide')); echo html_writer::select($groups, "group", $selectedgroup, get_string("allgroups")); } if ($showusers) { echo html_writer::label(get_string('participantslist'), 'menuuser', false, array('class' => 'accesshide')); echo html_writer::select($users, "user", $selecteduser, get_string("allparticipants")); } else { $users = array(); if (!empty($selecteduser)) { $user = $DB->get_record('user', array('id'=>$selecteduser)); $users[$selecteduser] = fullname($user); } else { $users[0] = get_string('allparticipants'); } echo html_writer::label(get_string('participantslist'), 'menuuser', false, array('class' => 'accesshide')); echo html_writer::select($users, "user", $selecteduser, false); $a = new stdClass(); $a->url = "$CFG->wwwroot/report/log/index.php?chooselog=0&group=$selectedgroup&user=$selecteduser" ."&id=$course->id&date=$selecteddate&modid=$selectedactivity&showusers=1&showcourses=$showcourses"; print_string('logtoomanyusers','moodle',$a); } echo html_writer::label(get_string('date'), 'menudate', false, array('class' => 'accesshide')); echo html_writer::select($dates, "date", $selecteddate, false); echo html_writer::label(get_string('showreports'), 'menumodid', false, array('class' => 'accesshide')); echo html_writer::select($activities, "modid", $selectedactivity, get_string("allactivities")); echo html_writer::label(get_string('actions'), 'menumodaction', false, array('class' => 'accesshide')); echo html_writer::select($actions, 'modaction', $modaction, get_string("allactions")); $logformats = array('showashtml' => get_string('displayonpage'), 'downloadascsv' => get_string('downloadtext'), 'downloadasods' => get_string('downloadods'), 'downloadasexcel' => get_string('downloadexcel')); echo html_writer::label(get_string('logsformat', 'report_log'), 'menulogformat', false, array('class' => 'accesshide')); echo html_writer::select($logformats, 'logformat', $logformat, false); echo '<input type="submit" value="'.get_string('gettheselogs').'" />'; echo '</div>'; echo '</form>'; } /** * Fetch logs since the start of the courses and structure in series and labels to be sent to Chart API. * * @param stdClass $course the course object * @param stdClass $user user object * @param string $logreader the log reader where the logs are. * @return array structured array to be sent to chart API, split in two indexes (series and labels). */ function report_log_userall_data($course, $user, $logreader) { global $CFG; $site = get_site(); $timenow = time(); $logs = []; if ($course->id == $site->id) { $courseselect = 0; } else { $courseselect = $course->id; } $maxseconds = REPORT_LOG_MAX_DISPLAY * 3600 * 24; // Seconds. if ($timenow - $course->startdate > $maxseconds) { $course->startdate = $timenow - $maxseconds; } if (!empty($CFG->loglifetime)) { $maxseconds = $CFG->loglifetime * 3600 * 24; // Seconds. if ($timenow - $course->startdate > $maxseconds) { $course->startdate = $timenow - $maxseconds; } } $timestart = $coursestart = usergetmidnight($course->startdate); $i = 0; $logs['series'][$i] = 0; $logs['labels'][$i] = 0; while ($timestart < $timenow) { $timefinish = $timestart + 86400; $logs['labels'][$i] = userdate($timestart, "%a %d %b"); $logs['series'][$i] = 0; $i++; $timestart = $timefinish; } $rawlogs = report_log_usercourse($user->id, $courseselect, $coursestart, $logreader); foreach ($rawlogs as $rawlog) { if (isset($logs['labels'][$rawlog->day])) { $logs['series'][$rawlog->day] = $rawlog->num; } } return $logs; } /** * Fetch logs of the current day and structure in series and labels to be sent to Chart API. * * @param stdClass $course the course object * @param stdClass $user user object * @param int $date A time of a day (in GMT). * @param string $logreader the log reader where the logs are. * @return array $logs structured array to be sent to chart API, split in two indexes (series and labels). */ function report_log_usertoday_data($course, $user, $date, $logreader) { $site = get_site(); $logs = []; if ($course->id == $site->id) { $courseselect = 0; } else { $courseselect = $course->id; } if ($date) { $daystart = usergetmidnight($date); } else { $daystart = usergetmidnight(time()); } for ($i = 0; $i <= 23; $i++) { $hour = $daystart + $i * 3600; $logs['series'][$i] = 0; $logs['labels'][$i] = userdate($hour, "%H:00"); } $rawlogs = report_log_userday($user->id, $courseselect, $daystart, $logreader); foreach ($rawlogs as $rawlog) { if (isset($logs['labels'][$rawlog->hour])) { $logs['series'][$rawlog->hour] = $rawlog->num; } } return $logs; }