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moodle/lib/statslib.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/>.
/**
* @package core
* @subpackage stats
* @copyright 1999 onwards Martin Dougiamas {@link http://moodle.com}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
/** THESE CONSTANTS ARE USED FOR THE REPORTING PAGE. */
define('STATS_REPORT_LOGINS',1); // double impose logins and unique logins on a line graph. site course only.
define('STATS_REPORT_READS',2); // double impose student reads and teacher reads on a line graph.
define('STATS_REPORT_WRITES',3); // double impose student writes and teacher writes on a line graph.
define('STATS_REPORT_ACTIVITY',4); // 2+3 added up, teacher vs student.
define('STATS_REPORT_ACTIVITYBYROLE',5); // all activity, reads vs writes, selected by role.
// user level stats reports.
define('STATS_REPORT_USER_ACTIVITY',7);
define('STATS_REPORT_USER_ALLACTIVITY',8);
define('STATS_REPORT_USER_LOGINS',9);
define('STATS_REPORT_USER_VIEW',10); // this is the report you see on the user profile.
// admin only ranking stats reports
define('STATS_REPORT_ACTIVE_COURSES',11);
define('STATS_REPORT_ACTIVE_COURSES_WEIGHTED',12);
define('STATS_REPORT_PARTICIPATORY_COURSES',13);
define('STATS_REPORT_PARTICIPATORY_COURSES_RW',14);
// start after 0 = show dailies.
define('STATS_TIME_LASTWEEK',1);
define('STATS_TIME_LAST2WEEKS',2);
define('STATS_TIME_LAST3WEEKS',3);
define('STATS_TIME_LAST4WEEKS',4);
// start after 10 = show weeklies
define('STATS_TIME_LAST2MONTHS',12);
define('STATS_TIME_LAST3MONTHS',13);
define('STATS_TIME_LAST4MONTHS',14);
define('STATS_TIME_LAST5MONTHS',15);
define('STATS_TIME_LAST6MONTHS',16);
// start after 20 = show monthlies
define('STATS_TIME_LAST7MONTHS',27);
define('STATS_TIME_LAST8MONTHS',28);
define('STATS_TIME_LAST9MONTHS',29);
define('STATS_TIME_LAST10MONTHS',30);
define('STATS_TIME_LAST11MONTHS',31);
define('STATS_TIME_LASTYEAR',32);
// different modes for what reports to offer
define('STATS_MODE_GENERAL',1);
define('STATS_MODE_DETAILED',2);
define('STATS_MODE_RANKED',3); // admins only - ranks courses
// Output string when nodebug is on
define('STATS_PLACEHOLDER_OUTPUT', '.');
/**
* Print daily cron progress
* @param string $ident
*/
function stats_progress($ident) {
static $start = 0;
static $init = 0;
if ($ident == 'init') {
$init = $start = microtime(true);
return;
}
$elapsed = round(microtime(true) - $start);
$start = microtime(true);
if (debugging('', DEBUG_ALL)) {
mtrace("$ident:$elapsed ", '');
} else {
mtrace(STATS_PLACEHOLDER_OUTPUT, '');
}
}
/**
* Execute individual daily statistics queries
*
* @param string $sql The query to run
* @return boolean success
*/
function stats_run_query($sql, $parameters = array()) {
global $DB;
try {
$DB->execute($sql, $parameters);
} catch (dml_exception $e) {
if (debugging('', DEBUG_ALL)) {
mtrace($e->getMessage());
}
return false;
}
return true;
}
/**
* Execute daily statistics gathering
*
* @param int $maxdays maximum number of days to be processed
* @return boolean success
*/
function stats_cron_daily($maxdays=1) {
global $CFG, $DB;
require_once($CFG->libdir.'/adminlib.php');
$now = time();
$fpcontext = context_course::instance(SITEID, MUST_EXIST);
// read last execution date from db
if (!$timestart = get_config(NULL, 'statslastdaily')) {
$timestart = stats_get_base_daily(stats_get_start_from('daily'));
set_config('statslastdaily', $timestart);
}
$nextmidnight = stats_get_next_day_start($timestart);
// are there any days that need to be processed?
if ($now < $nextmidnight) {
return true; // everything ok and up-to-date
}
$timeout = empty($CFG->statsmaxruntime) ? 60*60*24 : $CFG->statsmaxruntime;
if (!set_cron_lock('statsrunning', $now + $timeout)) {
return false;
}
// first delete entries that should not be there yet
$DB->delete_records_select('stats_daily', "timeend > $timestart");
$DB->delete_records_select('stats_user_daily', "timeend > $timestart");
// Read in a few things we'll use later
$viewactions = stats_get_action_names('view');
$postactions = stats_get_action_names('post');
$guest = (int)$CFG->siteguest;
$guestrole = (int)$CFG->guestroleid;
$defaultfproleid = (int)$CFG->defaultfrontpageroleid;
mtrace("Running daily statistics gathering, starting at $timestart:");
cron_trace_time_and_memory();
$days = 0;
$total = 0;
$failed = false; // failed stats flag
$timeout = false;
if (!stats_temp_table_create()) {
$days = 1;
$failed = true;
}
mtrace('Temporary tables created');
if(!stats_temp_table_setup()) {
$days = 1;
$failed = true;
}
mtrace('Enrolments calculated');
$totalactiveusers = $DB->count_records('user', array('deleted' => '0'));
while (!$failed && ($now > $nextmidnight)) {
if ($days >= $maxdays) {
$timeout = true;
break;
}
$days++;
core_php_time_limit::raise($timeout - 200);
if ($days > 1) {
// move the lock
set_cron_lock('statsrunning', time() + $timeout, true);
}
$daystart = time();
stats_progress('init');
if (!stats_temp_table_fill($timestart, $nextmidnight)) {
$failed = true;
break;
}
// Find out if any logs available for this day
$sql = "SELECT 'x' FROM {temp_log1} l";
$logspresent = $DB->get_records_sql($sql, null, 0, 1);
if ($logspresent) {
// Insert blank record to force Query 10 to generate additional row when no logs for
// the site with userid 0 exist. Added for backwards compatibility.
$DB->insert_record('temp_log1', array('userid' => 0, 'course' => SITEID, 'action' => ''));
}
// Calculate the number of active users today
$sql = 'SELECT COUNT(DISTINCT u.id)
FROM {user} u
JOIN {temp_log1} l ON l.userid = u.id
WHERE u.deleted = 0';
$dailyactiveusers = $DB->count_records_sql($sql);
stats_progress('0');
// Process login info first
// Note: PostgreSQL doesn't like aliases in HAVING clauses
$sql = "INSERT INTO {temp_stats_user_daily}
(stattype, timeend, courseid, userid, statsreads)
SELECT 'logins', $nextmidnight AS timeend, ".SITEID." AS courseid,
userid, COUNT(id) AS statsreads
FROM {temp_log1} l
WHERE action = 'login'
GROUP BY userid
HAVING COUNT(id) > 0";
if ($logspresent && !stats_run_query($sql)) {
$failed = true;
break;
}
$DB->update_temp_table_stats();
stats_progress('1');
$sql = "INSERT INTO {temp_stats_daily} (stattype, timeend, courseid, roleid, stat1, stat2)
SELECT 'logins' AS stattype, $nextmidnight AS timeend, ".SITEID." AS courseid, 0,
COALESCE(SUM(statsreads), 0) as stat1, COUNT('x') as stat2
FROM {temp_stats_user_daily}
WHERE stattype = 'logins' AND timeend = $nextmidnight";
if ($logspresent && !stats_run_query($sql)) {
$failed = true;
break;
}
stats_progress('2');
// Enrolments and active enrolled users
//
// Unfortunately, we do not know how many users were registered
// at given times in history :-(
// - stat1: enrolled users
// - stat2: enrolled users active in this period
// - SITEID is special case here, because it's all about default enrolment
// in that case, we'll count non-deleted users.
//
$sql = "INSERT INTO {temp_stats_daily} (stattype, timeend, courseid, roleid, stat1, stat2)
SELECT 'enrolments' as stattype, $nextmidnight as timeend, courseid, roleid,
COUNT(DISTINCT userid) as stat1, 0 as stat2
FROM {temp_enroled}
GROUP BY courseid, roleid";
if (!stats_run_query($sql)) {
$failed = true;
break;
}
stats_progress('3');
// Set stat2 to the number distinct users with role assignments in the course that were active
// using table alias in UPDATE does not work in pg < 8.2
$sql = "UPDATE {temp_stats_daily}
SET stat2 = (
SELECT COUNT(DISTINCT userid)
FROM {temp_enroled} te
WHERE roleid = {temp_stats_daily}.roleid
AND courseid = {temp_stats_daily}.courseid
AND EXISTS (
SELECT 'x'
FROM {temp_log1} l
WHERE l.course = {temp_stats_daily}.courseid
AND l.userid = te.userid
)
)
WHERE {temp_stats_daily}.stattype = 'enrolments'
AND {temp_stats_daily}.timeend = $nextmidnight
AND {temp_stats_daily}.courseid IN (
SELECT DISTINCT course FROM {temp_log2})";
if ($logspresent && !stats_run_query($sql, array('courselevel'=>CONTEXT_COURSE))) {
$failed = true;
break;
}
stats_progress('4');
// Now get course total enrolments (roleid==0) - except frontpage
$sql = "INSERT INTO {temp_stats_daily} (stattype, timeend, courseid, roleid, stat1, stat2)
SELECT 'enrolments', $nextmidnight AS timeend, te.courseid AS courseid, 0 AS roleid,
COUNT(DISTINCT userid) AS stat1, 0 AS stat2
FROM {temp_enroled} te
GROUP BY courseid
HAVING COUNT(DISTINCT userid) > 0";
if ($logspresent && !stats_run_query($sql)) {
$failed = true;
break;
}
stats_progress('5');
// Set stat 2 to the number of enrolled users who were active in the course
$sql = "UPDATE {temp_stats_daily}
SET stat2 = (
SELECT COUNT(DISTINCT te.userid)
FROM {temp_enroled} te
WHERE te.courseid = {temp_stats_daily}.courseid
AND EXISTS (
SELECT 'x'
FROM {temp_log1} l
WHERE l.course = {temp_stats_daily}.courseid
AND l.userid = te.userid
)
)
WHERE {temp_stats_daily}.stattype = 'enrolments'
AND {temp_stats_daily}.timeend = $nextmidnight
AND {temp_stats_daily}.roleid = 0
AND {temp_stats_daily}.courseid IN (
SELECT l.course
FROM {temp_log2} l
WHERE l.course <> ".SITEID.")";
if ($logspresent && !stats_run_query($sql, array())) {
$failed = true;
break;
}
stats_progress('6');
// Frontpage(==site) enrolments total
$sql = "INSERT INTO {temp_stats_daily} (stattype, timeend, courseid, roleid, stat1, stat2)
SELECT 'enrolments', $nextmidnight, ".SITEID.", 0, $totalactiveusers AS stat1,
$dailyactiveusers AS stat2" .
$DB->sql_null_from_clause();
if ($logspresent && !stats_run_query($sql)) {
$failed = true;
break;
}
// The steps up until this point, all add to {temp_stats_daily} and don't use new tables.
// There is no point updating statistics as they won't be used until the DELETE below.
$DB->update_temp_table_stats();
stats_progress('7');
// Default frontpage role enrolments are all site users (not deleted)
if ($defaultfproleid) {
// first remove default frontpage role counts if created by previous query
$sql = "DELETE
FROM {temp_stats_daily}
WHERE stattype = 'enrolments'
AND courseid = ".SITEID."
AND roleid = $defaultfproleid
AND timeend = $nextmidnight";
if ($logspresent && !stats_run_query($sql)) {
$failed = true;
break;
}
stats_progress('8');
$sql = "INSERT INTO {temp_stats_daily} (stattype, timeend, courseid, roleid, stat1, stat2)
SELECT 'enrolments', $nextmidnight, ".SITEID.", $defaultfproleid,
$totalactiveusers AS stat1, $dailyactiveusers AS stat2" .
$DB->sql_null_from_clause();
if ($logspresent && !stats_run_query($sql)) {
$failed = true;
break;
}
stats_progress('9');
} else {
stats_progress('x');
stats_progress('x');
}
/// individual user stats (including not-logged-in) in each course, this is slow - reuse this data if possible
list($viewactionssql, $params1) = $DB->get_in_or_equal($viewactions, SQL_PARAMS_NAMED, 'view');
list($postactionssql, $params2) = $DB->get_in_or_equal($postactions, SQL_PARAMS_NAMED, 'post');
$sql = "INSERT INTO {temp_stats_user_daily} (stattype, timeend, courseid, userid, statsreads, statswrites)
SELECT 'activity' AS stattype, $nextmidnight AS timeend, course AS courseid, userid,
SUM(CASE WHEN action $viewactionssql THEN 1 ELSE 0 END) AS statsreads,
SUM(CASE WHEN action $postactionssql THEN 1 ELSE 0 END) AS statswrites
FROM {temp_log1} l
GROUP BY userid, course";
if ($logspresent && !stats_run_query($sql, array_merge($params1, $params2))) {
$failed = true;
break;
}
stats_progress('10');
/// How many view/post actions in each course total
$sql = "INSERT INTO {temp_stats_daily} (stattype, timeend, courseid, roleid, stat1, stat2)
SELECT 'activity' AS stattype, $nextmidnight AS timeend, c.id AS courseid, 0,
SUM(CASE WHEN l.action $viewactionssql THEN 1 ELSE 0 END) AS stat1,
SUM(CASE WHEN l.action $postactionssql THEN 1 ELSE 0 END) AS stat2
FROM {course} c, {temp_log1} l
WHERE l.course = c.id
GROUP BY c.id";
if ($logspresent && !stats_run_query($sql, array_merge($params1, $params2))) {
$failed = true;
break;
}
stats_progress('11');
/// how many view actions for each course+role - excluding guests and frontpage
$sql = "INSERT INTO {temp_stats_daily} (stattype, timeend, courseid, roleid, stat1, stat2)
SELECT 'activity', $nextmidnight AS timeend, courseid, roleid, SUM(statsreads), SUM(statswrites)
FROM (
SELECT pl.courseid, pl.roleid, sud.statsreads, sud.statswrites
FROM {temp_stats_user_daily} sud, (
SELECT DISTINCT te.userid, te.roleid, te.courseid
FROM {temp_enroled} te
WHERE te.roleid <> $guestrole
AND te.userid <> $guest
) pl
WHERE sud.userid = pl.userid
AND sud.courseid = pl.courseid
AND sud.timeend = $nextmidnight
AND sud.stattype='activity'
) inline_view
GROUP BY courseid, roleid
HAVING SUM(statsreads) > 0 OR SUM(statswrites) > 0";
if ($logspresent && !stats_run_query($sql, array('courselevel'=>CONTEXT_COURSE))) {
$failed = true;
break;
}
stats_progress('12');
/// how many view actions from guests only in each course - excluding frontpage
/// normal users may enter course with temporary guest access too
$sql = "INSERT INTO {temp_stats_daily} (stattype, timeend, courseid, roleid, stat1, stat2)
SELECT 'activity', $nextmidnight AS timeend, courseid, $guestrole AS roleid,
SUM(statsreads), SUM(statswrites)
FROM (
SELECT sud.courseid, sud.statsreads, sud.statswrites
FROM {temp_stats_user_daily} sud
WHERE sud.timeend = $nextmidnight
AND sud.courseid <> ".SITEID."
AND sud.stattype='activity'
AND (sud.userid = $guest OR sud.userid NOT IN (
SELECT userid
FROM {temp_enroled} te
WHERE te.courseid = sud.courseid
))
) inline_view
GROUP BY courseid
HAVING SUM(statsreads) > 0 OR SUM(statswrites) > 0";
if ($logspresent && !stats_run_query($sql, array())) {
$failed = true;
break;
}
stats_progress('13');
/// How many view actions for each role on frontpage - excluding guests, not-logged-in and default frontpage role
$sql = "INSERT INTO {temp_stats_daily} (stattype, timeend, courseid, roleid, stat1, stat2)
SELECT 'activity', $nextmidnight AS timeend, courseid, roleid,
SUM(statsreads), SUM(statswrites)
FROM (
SELECT pl.courseid, pl.roleid, sud.statsreads, sud.statswrites
FROM {temp_stats_user_daily} sud, (
SELECT DISTINCT ra.userid, ra.roleid, c.instanceid AS courseid
FROM {role_assignments} ra
JOIN {context} c ON c.id = ra.contextid
WHERE ra.contextid = :fpcontext
AND ra.roleid <> $defaultfproleid
AND ra.roleid <> $guestrole
AND ra.userid <> $guest
) pl
WHERE sud.userid = pl.userid
AND sud.courseid = pl.courseid
AND sud.timeend = $nextmidnight
AND sud.stattype='activity'
) inline_view
GROUP BY courseid, roleid
HAVING SUM(statsreads) > 0 OR SUM(statswrites) > 0";
if ($logspresent && !stats_run_query($sql, array('fpcontext'=>$fpcontext->id))) {
$failed = true;
break;
}
stats_progress('14');
// How many view actions for default frontpage role on frontpage only
$sql = "INSERT INTO {temp_stats_daily} (stattype, timeend, courseid, roleid, stat1, stat2)
SELECT 'activity', timeend, courseid, $defaultfproleid AS roleid,
SUM(statsreads), SUM(statswrites)
FROM (
SELECT sud.timeend AS timeend, sud.courseid, sud.statsreads, sud.statswrites
FROM {temp_stats_user_daily} sud
WHERE sud.timeend = :nextm
AND sud.courseid = :siteid
AND sud.stattype='activity'
AND sud.userid <> $guest
AND sud.userid <> 0
AND sud.userid NOT IN (
SELECT ra.userid
FROM {role_assignments} ra
WHERE ra.roleid <> $guestrole
AND ra.roleid <> $defaultfproleid
AND ra.contextid = :fpcontext)
) inline_view
GROUP BY timeend, courseid
HAVING SUM(statsreads) > 0 OR SUM(statswrites) > 0";
if ($logspresent && !stats_run_query($sql, array('fpcontext'=>$fpcontext->id, 'siteid'=>SITEID, 'nextm'=>$nextmidnight))) {
$failed = true;
break;
}
$DB->update_temp_table_stats();
stats_progress('15');
// How many view actions for guests or not-logged-in on frontpage
$sql = "INSERT INTO {temp_stats_daily} (stattype, timeend, courseid, roleid, stat1, stat2)
SELECT stattype, timeend, courseid, $guestrole AS roleid,
SUM(statsreads) AS stat1, SUM(statswrites) AS stat2
FROM (
SELECT sud.stattype, sud.timeend, sud.courseid,
sud.statsreads, sud.statswrites
FROM {temp_stats_user_daily} sud
WHERE (sud.userid = $guest OR sud.userid = 0)
AND sud.timeend = $nextmidnight
AND sud.courseid = ".SITEID."
AND sud.stattype='activity'
) inline_view
GROUP BY stattype, timeend, courseid
HAVING SUM(statsreads) > 0 OR SUM(statswrites) > 0";
if ($logspresent && !stats_run_query($sql)) {
$failed = true;
break;
}
stats_progress('16');
stats_temp_table_clean();
stats_progress('out');
// remember processed days
set_config('statslastdaily', $nextmidnight);
$elapsed = time()-$daystart;
mtrace(" finished until $nextmidnight: ".userdate($nextmidnight)." (in $elapsed s)");
$total += $elapsed;
$timestart = $nextmidnight;
$nextmidnight = stats_get_next_day_start($nextmidnight);
}
stats_temp_table_drop();
set_cron_lock('statsrunning', null);
if ($failed) {
$days--;
mtrace("...error occurred, completed $days days of statistics in {$total} s.");
return false;
} else if ($timeout) {
mtrace("...stopping early, reached maximum number of $maxdays days ({$total} s) - will continue next time.");
return false;
} else {
mtrace("...completed $days days of statistics in {$total} s.");
return true;
}
}
/**
* Execute weekly statistics gathering
* @return boolean success
*/
function stats_cron_weekly() {
global $CFG, $DB;
require_once($CFG->libdir.'/adminlib.php');
$now = time();
// read last execution date from db
if (!$timestart = get_config(NULL, 'statslastweekly')) {
$timestart = stats_get_base_daily(stats_get_start_from('weekly'));
set_config('statslastweekly', $timestart);
}
$nextstartweek = stats_get_next_week_start($timestart);
// are there any weeks that need to be processed?
if ($now < $nextstartweek) {
return true; // everything ok and up-to-date
}
$timeout = empty($CFG->statsmaxruntime) ? 60*60*24 : $CFG->statsmaxruntime;
if (!set_cron_lock('statsrunning', $now + $timeout)) {
return false;
}
// fisrt delete entries that should not be there yet
$DB->delete_records_select('stats_weekly', "timeend > $timestart");
$DB->delete_records_select('stats_user_weekly', "timeend > $timestart");
mtrace("Running weekly statistics gathering, starting at $timestart:");
cron_trace_time_and_memory();
$weeks = 0;
while ($now > $nextstartweek) {
core_php_time_limit::raise($timeout - 200);
$weeks++;
if ($weeks > 1) {
// move the lock
set_cron_lock('statsrunning', time() + $timeout, true);
}
$stattimesql = "timeend > $timestart AND timeend <= $nextstartweek";
$weekstart = time();
stats_progress('init');
/// process login info first
$sql = "INSERT INTO {stats_user_weekly} (stattype, timeend, courseid, userid, statsreads)
SELECT 'logins', timeend, courseid, userid, SUM(statsreads)
FROM (
SELECT $nextstartweek AS timeend, courseid, userid, statsreads
FROM {stats_user_daily} sd
WHERE stattype = 'logins' AND $stattimesql
) inline_view
GROUP BY timeend, courseid, userid
HAVING SUM(statsreads) > 0";
$DB->execute($sql);
stats_progress('1');
$sql = "INSERT INTO {stats_weekly} (stattype, timeend, courseid, roleid, stat1, stat2)
SELECT 'logins' AS stattype, $nextstartweek AS timeend, ".SITEID." as courseid, 0,
COALESCE((SELECT SUM(statsreads)
FROM {stats_user_weekly} s1
WHERE s1.stattype = 'logins' AND timeend = $nextstartweek), 0) AS nstat1,
(SELECT COUNT('x')
FROM {stats_user_weekly} s2
WHERE s2.stattype = 'logins' AND timeend = $nextstartweek) AS nstat2" .
$DB->sql_null_from_clause();
$DB->execute($sql);
stats_progress('2');
/// now enrolments averages
$sql = "INSERT INTO {stats_weekly} (stattype, timeend, courseid, roleid, stat1, stat2)
SELECT 'enrolments', ntimeend, courseid, roleid, " . $DB->sql_ceil('AVG(stat1)') . ", " . $DB->sql_ceil('AVG(stat2)') . "
FROM (
SELECT $nextstartweek AS ntimeend, courseid, roleid, stat1, stat2
FROM {stats_daily} sd
WHERE stattype = 'enrolments' AND $stattimesql
) inline_view
GROUP BY ntimeend, courseid, roleid";
$DB->execute($sql);
stats_progress('3');
/// activity read/write averages
$sql = "INSERT INTO {stats_weekly} (stattype, timeend, courseid, roleid, stat1, stat2)
SELECT 'activity', ntimeend, courseid, roleid, SUM(stat1), SUM(stat2)
FROM (
SELECT $nextstartweek AS ntimeend, courseid, roleid, stat1, stat2
FROM {stats_daily}
WHERE stattype = 'activity' AND $stattimesql
) inline_view
GROUP BY ntimeend, courseid, roleid";
$DB->execute($sql);
stats_progress('4');
/// user read/write averages
$sql = "INSERT INTO {stats_user_weekly} (stattype, timeend, courseid, userid, statsreads, statswrites)
SELECT 'activity', ntimeend, courseid, userid, SUM(statsreads), SUM(statswrites)
FROM (
SELECT $nextstartweek AS ntimeend, courseid, userid, statsreads, statswrites
FROM {stats_user_daily}
WHERE stattype = 'activity' AND $stattimesql
) inline_view
GROUP BY ntimeend, courseid, userid";
$DB->execute($sql);
stats_progress('5');
set_config('statslastweekly', $nextstartweek);
$elapsed = time()-$weekstart;
mtrace(" finished until $nextstartweek: ".userdate($nextstartweek) ." (in $elapsed s)");
$timestart = $nextstartweek;
$nextstartweek = stats_get_next_week_start($nextstartweek);
}
set_cron_lock('statsrunning', null);
mtrace("...completed $weeks weeks of statistics.");
return true;
}
/**
* Execute monthly statistics gathering
* @return boolean success
*/
function stats_cron_monthly() {
global $CFG, $DB;
require_once($CFG->libdir.'/adminlib.php');
$now = time();
// read last execution date from db
if (!$timestart = get_config(NULL, 'statslastmonthly')) {
$timestart = stats_get_base_monthly(stats_get_start_from('monthly'));
set_config('statslastmonthly', $timestart);
}
$nextstartmonth = stats_get_next_month_start($timestart);
// are there any months that need to be processed?
if ($now < $nextstartmonth) {
return true; // everything ok and up-to-date
}
$timeout = empty($CFG->statsmaxruntime) ? 60*60*24 : $CFG->statsmaxruntime;
if (!set_cron_lock('statsrunning', $now + $timeout)) {
return false;
}
// fisr delete entries that should not be there yet
$DB->delete_records_select('stats_monthly', "timeend > $timestart");
$DB->delete_records_select('stats_user_monthly', "timeend > $timestart");
$startmonth = stats_get_base_monthly($now);
mtrace("Running monthly statistics gathering, starting at $timestart:");
cron_trace_time_and_memory();
$months = 0;
while ($now > $nextstartmonth) {
core_php_time_limit::raise($timeout - 200);
$months++;
if ($months > 1) {
// move the lock
set_cron_lock('statsrunning', time() + $timeout, true);
}
$stattimesql = "timeend > $timestart AND timeend <= $nextstartmonth";
$monthstart = time();
stats_progress('init');
/// process login info first
$sql = "INSERT INTO {stats_user_monthly} (stattype, timeend, courseid, userid, statsreads)
SELECT 'logins', timeend, courseid, userid, SUM(statsreads)
FROM (
SELECT $nextstartmonth AS timeend, courseid, userid, statsreads
FROM {stats_user_daily} sd
WHERE stattype = 'logins' AND $stattimesql
) inline_view
GROUP BY timeend, courseid, userid
HAVING SUM(statsreads) > 0";
$DB->execute($sql);
stats_progress('1');
$sql = "INSERT INTO {stats_monthly} (stattype, timeend, courseid, roleid, stat1, stat2)
SELECT 'logins' AS stattype, $nextstartmonth AS timeend, ".SITEID." as courseid, 0,
COALESCE((SELECT SUM(statsreads)
FROM {stats_user_monthly} s1
WHERE s1.stattype = 'logins' AND timeend = $nextstartmonth), 0) AS nstat1,
(SELECT COUNT('x')
FROM {stats_user_monthly} s2
WHERE s2.stattype = 'logins' AND timeend = $nextstartmonth) AS nstat2" .
$DB->sql_null_from_clause();
$DB->execute($sql);
stats_progress('2');
/// now enrolments averages
$sql = "INSERT INTO {stats_monthly} (stattype, timeend, courseid, roleid, stat1, stat2)
SELECT 'enrolments', ntimeend, courseid, roleid, " . $DB->sql_ceil('AVG(stat1)') . ", " . $DB->sql_ceil('AVG(stat2)') . "
FROM (
SELECT $nextstartmonth AS ntimeend, courseid, roleid, stat1, stat2
FROM {stats_daily} sd
WHERE stattype = 'enrolments' AND $stattimesql
) inline_view
GROUP BY ntimeend, courseid, roleid";
$DB->execute($sql);
stats_progress('3');
/// activity read/write averages
$sql = "INSERT INTO {stats_monthly} (stattype, timeend, courseid, roleid, stat1, stat2)
SELECT 'activity', ntimeend, courseid, roleid, SUM(stat1), SUM(stat2)
FROM (
SELECT $nextstartmonth AS ntimeend, courseid, roleid, stat1, stat2
FROM {stats_daily}
WHERE stattype = 'activity' AND $stattimesql
) inline_view
GROUP BY ntimeend, courseid, roleid";
$DB->execute($sql);
stats_progress('4');
/// user read/write averages
$sql = "INSERT INTO {stats_user_monthly} (stattype, timeend, courseid, userid, statsreads, statswrites)
SELECT 'activity', ntimeend, courseid, userid, SUM(statsreads), SUM(statswrites)
FROM (
SELECT $nextstartmonth AS ntimeend, courseid, userid, statsreads, statswrites
FROM {stats_user_daily}
WHERE stattype = 'activity' AND $stattimesql
) inline_view
GROUP BY ntimeend, courseid, userid";
$DB->execute($sql);
stats_progress('5');
set_config('statslastmonthly', $nextstartmonth);
$elapsed = time() - $monthstart;
mtrace(" finished until $nextstartmonth: ".userdate($nextstartmonth) ." (in $elapsed s)");
$timestart = $nextstartmonth;
$nextstartmonth = stats_get_next_month_start($nextstartmonth);
}
set_cron_lock('statsrunning', null);
mtrace("...completed $months months of statistics.");
return true;
}
/**
* Return starting date of stats processing
* @param string $str name of table - daily, weekly or monthly
* @return int timestamp
*/
function stats_get_start_from($str) {
global $CFG, $DB;
// are there any data in stats table? Should not be...
if ($timeend = $DB->get_field_sql('SELECT MAX(timeend) FROM {stats_'.$str.'}')) {
return $timeend;
}
// decide what to do based on our config setting (either all or none or a timestamp)
switch ($CFG->statsfirstrun) {
case 'all':
$manager = get_log_manager();
$stores = $manager->get_readers();
$firstlog = false;
foreach ($stores as $store) {
if ($store instanceof \core\log\sql_internal_table_reader) {
$logtable = $store->get_internal_log_table_name();
if (!$logtable) {
continue;
}
$first = $DB->get_field_sql("SELECT MIN(timecreated) FROM {{$logtable}}");
if ($first and (!$firstlog or $firstlog > $first)) {
$firstlog = $first;
}
}
}
$first = $DB->get_field_sql('SELECT MIN(time) FROM {log}');
if ($first and (!$firstlog or $firstlog > $first)) {
$firstlog = $first;
}
if ($firstlog) {
return $firstlog;
}
default:
if (is_numeric($CFG->statsfirstrun)) {
return time() - $CFG->statsfirstrun;
}
// not a number? use next instead
case 'none':
return strtotime('-3 day', time());
}
}
/**
* Start of day
* @param int $time timestamp
* @return int start of day
*/
function stats_get_base_daily($time=0) {
if (empty($time)) {
$time = time();
}
core_date::set_default_server_timezone();
$time = strtotime(date('d-M-Y', $time));
return $time;
}
/**
* Start of week
* @param int $time timestamp
* @return int start of week
*/
function stats_get_base_weekly($time=0) {
global $CFG;
$datetime = new DateTime();
$datetime->setTimestamp(stats_get_base_daily($time));
$startday = $CFG->calendar_startwday;
core_date::set_default_server_timezone();
$thisday = date('w', $time);
$days = 0;
if ($thisday > $startday) {
$days = $thisday - $startday;
} else if ($thisday < $startday) {
$days = 7 + $thisday - $startday;
}
$datetime->sub(new DateInterval("P{$days}D"));
return $datetime->getTimestamp();
}
/**
* Start of month
* @param int $time timestamp
* @return int start of month
*/
function stats_get_base_monthly($time=0) {
if (empty($time)) {
$time = time();
}
core_date::set_default_server_timezone();
$return = strtotime(date('1-M-Y', $time));
return $return;
}
/**
* Start of next day
* @param int $time timestamp
* @return start of next day
*/
function stats_get_next_day_start($time) {
$next = stats_get_base_daily($time);
$nextdate = new DateTime();
$nextdate->setTimestamp($next);
$nextdate->add(new DateInterval('P1D'));
return $nextdate->getTimestamp();
}
/**
* Start of next week
* @param int $time timestamp
* @return start of next week
*/
function stats_get_next_week_start($time) {
$next = stats_get_base_weekly($time);
$nextdate = new DateTime();
$nextdate->setTimestamp($next);
$nextdate->add(new DateInterval('P1W'));
return $nextdate->getTimestamp();
}
/**
* Start of next month
* @param int $time timestamp
* @return start of next month
*/
function stats_get_next_month_start($time) {
$next = stats_get_base_monthly($time);
$nextdate = new DateTime();
$nextdate->setTimestamp($next);
$nextdate->add(new DateInterval('P1M'));
return $nextdate->getTimestamp();
}
/**
* Remove old stats data
*/
function stats_clean_old() {
global $DB;
mtrace("Running stats cleanup tasks...");
cron_trace_time_and_memory();
$deletebefore = stats_get_base_monthly();
// delete dailies older than 3 months (to be safe)
$deletebefore = strtotime('-3 months', $deletebefore);
$DB->delete_records_select('stats_daily', "timeend < $deletebefore");
$DB->delete_records_select('stats_user_daily', "timeend < $deletebefore");
// delete weeklies older than 9 months (to be safe)
$deletebefore = strtotime('-6 months', $deletebefore);
$DB->delete_records_select('stats_weekly', "timeend < $deletebefore");
$DB->delete_records_select('stats_user_weekly', "timeend < $deletebefore");
// don't delete monthlies
mtrace("...stats cleanup finished");
}
function stats_get_parameters($time,$report,$courseid,$mode,$roleid=0) {
global $CFG, $DB;
$param = new stdClass();
$param->params = array();
if ($time < 10) { // dailies
// number of days to go back = 7* time
$param->table = 'daily';
$param->timeafter = strtotime("-".($time*7)." days",stats_get_base_daily());
} elseif ($time < 20) { // weeklies
// number of weeks to go back = time - 10 * 4 (weeks) + base week
$param->table = 'weekly';
$param->timeafter = strtotime("-".(($time - 10)*4)." weeks",stats_get_base_weekly());
} else { // monthlies.
// number of months to go back = time - 20 * months + base month
$param->table = 'monthly';
$param->timeafter = strtotime("-".($time - 20)." months",stats_get_base_monthly());
}
$param->extras = '';
switch ($report) {
// ******************** STATS_MODE_GENERAL ******************** //
case STATS_REPORT_LOGINS:
$param->fields = 'timeend,sum(stat1) as line1,sum(stat2) as line2';
$param->fieldscomplete = true;
$param->stattype = 'logins';
$param->line1 = get_string('statslogins');
$param->line2 = get_string('statsuniquelogins');
if ($courseid == SITEID) {
$param->extras = 'GROUP BY timeend';
}
break;
case STATS_REPORT_READS:
$param->fields = $DB->sql_concat('timeend','roleid').' AS uniqueid, timeend, roleid, stat1 as line1';
$param->fieldscomplete = true; // set this to true to avoid anything adding stuff to the list and breaking complex queries.
$param->aggregategroupby = 'roleid';
$param->stattype = 'activity';
$param->crosstab = true;
$param->extras = 'GROUP BY timeend,roleid,stat1';
if ($courseid == SITEID) {
$param->fields = $DB->sql_concat('timeend','roleid').' AS uniqueid, timeend, roleid, sum(stat1) as line1';
$param->extras = 'GROUP BY timeend,roleid';
}
break;
case STATS_REPORT_WRITES:
$param->fields = $DB->sql_concat('timeend','roleid').' AS uniqueid, timeend, roleid, stat2 as line1';
$param->fieldscomplete = true; // set this to true to avoid anything adding stuff to the list and breaking complex queries.
$param->aggregategroupby = 'roleid';
$param->stattype = 'activity';
$param->crosstab = true;
$param->extras = 'GROUP BY timeend,roleid,stat2';
if ($courseid == SITEID) {
$param->fields = $DB->sql_concat('timeend','roleid').' AS uniqueid, timeend, roleid, sum(stat2) as line1';
$param->extras = 'GROUP BY timeend,roleid';
}
break;
case STATS_REPORT_ACTIVITY:
$param->fields = $DB->sql_concat('timeend','roleid').' AS uniqueid, timeend, roleid, sum(stat1+stat2) as line1';
$param->fieldscomplete = true; // set this to true to avoid anything adding stuff to the list and breaking complex queries.
$param->aggregategroupby = 'roleid';
$param->stattype = 'activity';
$param->crosstab = true;
$param->extras = 'GROUP BY timeend,roleid';
if ($courseid == SITEID) {
$param->extras = 'GROUP BY timeend,roleid';
}
break;
case STATS_REPORT_ACTIVITYBYROLE;
$param->fields = 'stat1 AS line1, stat2 AS line2';
$param->stattype = 'activity';
$rolename = '';
if ($roleid <> 0) {
if ($role = $DB->get_record('role', ['id' => $roleid])) {
$rolename = role_get_name($role, context_course::instance($courseid)) . ' ';
}
}
$param->line1 = $rolename . get_string('statsreads');
$param->line2 = $rolename . get_string('statswrites');
if ($courseid == SITEID) {
$param->extras = 'GROUP BY timeend';
}
break;
// ******************** STATS_MODE_DETAILED ******************** //
case STATS_REPORT_USER_ACTIVITY:
$param->fields = 'statsreads as line1, statswrites as line2';
$param->line1 = get_string('statsuserreads');
$param->line2 = get_string('statsuserwrites');
$param->stattype = 'activity';
break;
case STATS_REPORT_USER_ALLACTIVITY:
$param->fields = 'statsreads+statswrites as line1';
$param->line1 = get_string('statsuseractivity');
$param->stattype = 'activity';
break;
case STATS_REPORT_USER_LOGINS:
$param->fields = 'statsreads as line1';
$param->line1 = get_string('statsuserlogins');
$param->stattype = 'logins';
break;
case STATS_REPORT_USER_VIEW:
$param->fields = 'statsreads as line1, statswrites as line2, statsreads+statswrites as line3';
$param->line1 = get_string('statsuserreads');
$param->line2 = get_string('statsuserwrites');
$param->line3 = get_string('statsuseractivity');
$param->stattype = 'activity';
break;
// ******************** STATS_MODE_RANKED ******************** //
case STATS_REPORT_ACTIVE_COURSES:
$param->fields = 'sum(stat1+stat2) AS line1';
$param->stattype = 'activity';
$param->orderby = 'line1 DESC';
$param->line1 = get_string('useractivity');
$param->graphline = 'line1';
break;
case STATS_REPORT_ACTIVE_COURSES_WEIGHTED:
$threshold = 0;
if (!empty($CFG->statsuserthreshold) && is_numeric($CFG->statsuserthreshold)) {
$threshold = $CFG->statsuserthreshold;
}
$param->fields = '';
$param->sql = 'SELECT activity.courseid, activity.all_activity AS line1, enrolments.highest_enrolments AS line2,
activity.all_activity / enrolments.highest_enrolments as line3
FROM (
SELECT courseid, sum(stat1+stat2) AS all_activity
FROM {stats_'.$param->table.'}
WHERE stattype=\'activity\' AND timeend >= '.(int)$param->timeafter.' AND roleid = 0 GROUP BY courseid
) activity
INNER JOIN
(
SELECT courseid, max(stat1) AS highest_enrolments
FROM {stats_'.$param->table.'}
WHERE stattype=\'enrolments\' AND timeend >= '.(int)$param->timeafter.' AND stat1 > '.(int)$threshold.'
GROUP BY courseid
) enrolments
ON (activity.courseid = enrolments.courseid)
ORDER BY line3 DESC';
$param->line1 = get_string('useractivity');
$param->line2 = get_string('users');
$param->line3 = get_string('activityweighted');
$param->graphline = 'line3';
break;
case STATS_REPORT_PARTICIPATORY_COURSES:
$threshold = 0;
if (!empty($CFG->statsuserthreshold) && is_numeric($CFG->statsuserthreshold)) {
$threshold = $CFG->statsuserthreshold;
}
$param->fields = '';
$param->sql = 'SELECT courseid, ' . $DB->sql_ceil('avg(all_enrolments)') . ' as line1, ' .
$DB->sql_ceil('avg(active_enrolments)') . ' as line2, avg(proportion_active) AS line3
FROM (
SELECT courseid, timeend, stat2 as active_enrolments,
stat1 as all_enrolments, '.$DB->sql_cast_char2real('stat2').'/'.$DB->sql_cast_char2real('stat1').' AS proportion_active
FROM {stats_'.$param->table.'}
WHERE stattype=\'enrolments\' AND roleid = 0 AND stat1 > '.(int)$threshold.'
) aq
WHERE timeend >= '.(int)$param->timeafter.'
GROUP BY courseid
ORDER BY line3 DESC';
$param->line1 = get_string('users');
$param->line2 = get_string('activeusers');
$param->line3 = get_string('participationratio');
$param->graphline = 'line3';
break;
case STATS_REPORT_PARTICIPATORY_COURSES_RW:
$param->fields = '';
$param->sql = 'SELECT courseid, sum(views) AS line1, sum(posts) AS line2,
avg(proportion_active) AS line3
FROM (
SELECT courseid, timeend, stat1 as views, stat2 AS posts,
'.$DB->sql_cast_char2real('stat2').'/'.$DB->sql_cast_char2real('stat1').' as proportion_active
FROM {stats_'.$param->table.'}
WHERE stattype=\'activity\' AND roleid = 0 AND stat1 > 0
) aq
WHERE timeend >= '.(int)$param->timeafter.'
GROUP BY courseid
ORDER BY line3 DESC';
$param->line1 = get_string('views');
$param->line2 = get_string('posts');
$param->line3 = get_string('participationratio');
$param->graphline = 'line3';
break;
}
/*
if ($courseid == SITEID && $mode != STATS_MODE_RANKED) { // just aggregate all courses.
$param->fields = preg_replace('/(?:sum)([a-zA-Z0-9+_]*)\W+as\W+([a-zA-Z0-9_]*)/i','sum($1) as $2',$param->fields);
$param->extras = ' GROUP BY timeend'.((!empty($param->aggregategroupby)) ? ','.$param->aggregategroupby : '');
}
*/
//TODO must add the SITEID reports to the rest of the reports.
return $param;
}
function stats_get_view_actions() {
return array('view','view all','history');
}
function stats_get_post_actions() {
return array('add','delete','edit','add mod','delete mod','edit section'.'enrol','loginas','new','unenrol','update','update mod');
}
function stats_get_action_names($str) {
global $CFG, $DB;
$mods = $DB->get_records('modules');
$function = 'stats_get_'.$str.'_actions';
$actions = $function();
foreach ($mods as $mod) {
$file = $CFG->dirroot.'/mod/'.$mod->name.'/lib.php';
if (!is_readable($file)) {
continue;
}
require_once($file);
$function = $mod->name.'_get_'.$str.'_actions';
if (function_exists($function)) {
$mod_actions = $function();
if (is_array($mod_actions)) {
$actions = array_merge($actions, $mod_actions);
}
}
}
// The array_values() forces a stack-like array
// so we can later loop over safely...
$actions = array_values(array_unique($actions));
$c = count($actions);
for ($n=0;$n<$c;$n++) {
$actions[$n] = $actions[$n];
}
return $actions;
}
function stats_get_time_options($now,$lastweekend,$lastmonthend,$earliestday,$earliestweek,$earliestmonth) {
$now = stats_get_base_daily(time());
// it's really important that it's TIMEEND in the table. ie, tuesday 00:00:00 is monday night.
// so we need to take a day off here (essentially add a day to $now
$now += 60*60*24;
$timeoptions = array();
if ($now - (60*60*24*7) >= $earliestday) {
$timeoptions[STATS_TIME_LASTWEEK] = get_string('numweeks','moodle',1);
}
if ($now - (60*60*24*14) >= $earliestday) {
$timeoptions[STATS_TIME_LAST2WEEKS] = get_string('numweeks','moodle',2);
}
if ($now - (60*60*24*21) >= $earliestday) {
$timeoptions[STATS_TIME_LAST3WEEKS] = get_string('numweeks','moodle',3);
}
if ($now - (60*60*24*28) >= $earliestday) {
$timeoptions[STATS_TIME_LAST4WEEKS] = get_string('numweeks','moodle',4);// show dailies up to (including) here.
}
if ($lastweekend - (60*60*24*56) >= $earliestweek) {
$timeoptions[STATS_TIME_LAST2MONTHS] = get_string('nummonths','moodle',2);
}
if ($lastweekend - (60*60*24*84) >= $earliestweek) {
$timeoptions[STATS_TIME_LAST3MONTHS] = get_string('nummonths','moodle',3);
}
if ($lastweekend - (60*60*24*112) >= $earliestweek) {
$timeoptions[STATS_TIME_LAST4MONTHS] = get_string('nummonths','moodle',4);
}
if ($lastweekend - (60*60*24*140) >= $earliestweek) {
$timeoptions[STATS_TIME_LAST5MONTHS] = get_string('nummonths','moodle',5);
}
if ($lastweekend - (60*60*24*168) >= $earliestweek) {
$timeoptions[STATS_TIME_LAST6MONTHS] = get_string('nummonths','moodle',6); // show weeklies up to (including) here
}
if (strtotime('-7 months',$lastmonthend) >= $earliestmonth) {
$timeoptions[STATS_TIME_LAST7MONTHS] = get_string('nummonths','moodle',7);
}
if (strtotime('-8 months',$lastmonthend) >= $earliestmonth) {
$timeoptions[STATS_TIME_LAST8MONTHS] = get_string('nummonths','moodle',8);
}
if (strtotime('-9 months',$lastmonthend) >= $earliestmonth) {
$timeoptions[STATS_TIME_LAST9MONTHS] = get_string('nummonths','moodle',9);
}
if (strtotime('-10 months',$lastmonthend) >= $earliestmonth) {
$timeoptions[STATS_TIME_LAST10MONTHS] = get_string('nummonths','moodle',10);
}
if (strtotime('-11 months',$lastmonthend) >= $earliestmonth) {
$timeoptions[STATS_TIME_LAST11MONTHS] = get_string('nummonths','moodle',11);
}
if (strtotime('-1 year',$lastmonthend) >= $earliestmonth) {
$timeoptions[STATS_TIME_LASTYEAR] = get_string('lastyear');
}
$years = (int)date('y', $now) - (int)date('y', $earliestmonth);
if ($years > 1) {
for($i = 2; $i <= $years; $i++) {
$timeoptions[$i*12+20] = get_string('numyears', 'moodle', $i);
}
}
return $timeoptions;
}
function stats_get_report_options($courseid,$mode) {
global $CFG, $DB;
$reportoptions = array();
switch ($mode) {
case STATS_MODE_GENERAL:
$reportoptions[STATS_REPORT_ACTIVITY] = get_string('statsreport'.STATS_REPORT_ACTIVITY);
if ($courseid != SITEID && $context = context_course::instance($courseid)) {
$sql = 'SELECT r.id, r.name, r.shortname FROM {role} r JOIN {stats_daily} s ON s.roleid = r.id
WHERE s.courseid = :courseid GROUP BY r.id, r.name, r.shortname';
if ($roles = $DB->get_records_sql($sql, array('courseid' => $courseid))) {
$roles = array_intersect_key($roles, get_viewable_roles($context));
foreach ($roles as $role) {
$reportoptions[STATS_REPORT_ACTIVITYBYROLE.$role->id] = get_string('statsreport'.STATS_REPORT_ACTIVITYBYROLE).
' ' . role_get_name($role, $context);
}
}
}
$reportoptions[STATS_REPORT_READS] = get_string('statsreport'.STATS_REPORT_READS);
$reportoptions[STATS_REPORT_WRITES] = get_string('statsreport'.STATS_REPORT_WRITES);
if ($courseid == SITEID) {
$reportoptions[STATS_REPORT_LOGINS] = get_string('statsreport'.STATS_REPORT_LOGINS);
}
break;
case STATS_MODE_DETAILED:
$reportoptions[STATS_REPORT_USER_ACTIVITY] = get_string('statsreport'.STATS_REPORT_USER_ACTIVITY);
$reportoptions[STATS_REPORT_USER_ALLACTIVITY] = get_string('statsreport'.STATS_REPORT_USER_ALLACTIVITY);
if (has_capability('report/stats:view', context_system::instance())) {
$site = get_site();
$reportoptions[STATS_REPORT_USER_LOGINS] = get_string('statsreport'.STATS_REPORT_USER_LOGINS);
}
break;
case STATS_MODE_RANKED:
if (has_capability('report/stats:view', context_system::instance())) {
$reportoptions[STATS_REPORT_ACTIVE_COURSES] = get_string('statsreport'.STATS_REPORT_ACTIVE_COURSES);
$reportoptions[STATS_REPORT_ACTIVE_COURSES_WEIGHTED] = get_string('statsreport'.STATS_REPORT_ACTIVE_COURSES_WEIGHTED);
$reportoptions[STATS_REPORT_PARTICIPATORY_COURSES] = get_string('statsreport'.STATS_REPORT_PARTICIPATORY_COURSES);
$reportoptions[STATS_REPORT_PARTICIPATORY_COURSES_RW] = get_string('statsreport'.STATS_REPORT_PARTICIPATORY_COURSES_RW);
}
break;
}
return $reportoptions;
}
/**
* Fix missing entries in the statistics.
*
* This creates a dummy stat when nothing happened during a day/week/month.
*
* @param array $stats array of statistics.
* @param int $timeafter unused.
* @param string $timestr type of statistics to generate (dayly, weekly, monthly).
* @param boolean $line2
* @param boolean $line3
* @return array of fixed statistics.
*/
function stats_fix_zeros($stats,$timeafter,$timestr,$line2=true,$line3=false) {
if (empty($stats)) {
return;
}
$timestr = str_replace('user_','',$timestr); // just in case.
// Gets the current user base time.
$fun = 'stats_get_base_'.$timestr;
$now = $fun();
// Extract the ending time of the statistics.
$actualtimes = array();
$actualtimeshour = null;
foreach ($stats as $statid => $s) {
// Normalise the month date to the 1st if for any reason it's set to later. But we ignore
// anything above or equal to 29 because sometimes we get the end of the month. Also, we will
// set the hours of the result to all of them, that way we prevent DST differences.
if ($timestr == 'monthly') {
$day = date('d', $s->timeend);
if (date('d', $s->timeend) > 1 && date('d', $s->timeend) < 29) {
$day = 1;
}
if (is_null($actualtimeshour)) {
$actualtimeshour = date('H', $s->timeend);
}
$s->timeend = mktime($actualtimeshour, 0, 0, date('m', $s->timeend), $day, date('Y', $s->timeend));
}
$stats[$statid] = $s;
$actualtimes[] = $s->timeend;
}
$actualtimesvalues = array_values($actualtimes);
$timeafter = array_pop($actualtimesvalues);
// Generate a base timestamp for each possible month/week/day.
$times = array();
while ($timeafter < $now) {
$times[] = $timeafter;
if ($timestr == 'daily') {
$timeafter = stats_get_next_day_start($timeafter);
} else if ($timestr == 'weekly') {
$timeafter = stats_get_next_week_start($timeafter);
} else if ($timestr == 'monthly') {
// We can't just simply +1 month because the 31st Jan + 1 month = 2nd of March.
$year = date('Y', $timeafter);
$month = date('m', $timeafter);
$day = date('d', $timeafter);
$dayofnextmonth = $day;
if ($day >= 29) {
$daysinmonth = date('n', mktime(0, 0, 0, $month+1, 1, $year));
if ($day > $daysinmonth) {
$dayofnextmonth = $daysinmonth;
}
}
$timeafter = mktime($actualtimeshour, 0, 0, $month+1, $dayofnextmonth, $year);
} else {
// This will put us in a never ending loop.
return $stats;
}
}
// Add the base timestamp to the statistics if not present.
foreach ($times as $count => $time) {
if (!in_array($time,$actualtimes) && $count != count($times) -1) {
$newobj = new StdClass;
$newobj->timeend = $time;
$newobj->id = 0;
$newobj->roleid = 0;
$newobj->line1 = 0;
if (!empty($line2)) {
$newobj->line2 = 0;
}
if (!empty($line3)) {
$newobj->line3 = 0;
}
$newobj->zerofixed = true;
$stats[] = $newobj;
}
}
usort($stats,"stats_compare_times");
return $stats;
}
// helper function to sort arrays by $obj->timeend
function stats_compare_times($a,$b) {
if ($a->timeend == $b->timeend) {
return 0;
}
return ($a->timeend > $b->timeend) ? -1 : 1;
}
function stats_check_uptodate($courseid=0) {
global $CFG, $DB;
if (empty($courseid)) {
$courseid = SITEID;
}
$latestday = stats_get_start_from('daily');
if ((time() - 60*60*24*2) < $latestday) { // we're ok
return NULL;
}
$a = new stdClass();
$a->daysdone = $DB->get_field_sql("SELECT COUNT(DISTINCT(timeend)) FROM {stats_daily}");
// how many days between the last day and now?
$a->dayspending = ceil((stats_get_base_daily() - $latestday)/(60*60*24));
if ($a->dayspending == 0 && $a->daysdone != 0) {
return NULL; // we've only just started...
}
//return error as string
return get_string('statscatchupmode','error',$a);
}
/**
* Create temporary tables to speed up log generation
*/
function stats_temp_table_create() {
global $CFG, $DB;
$dbman = $DB->get_manager(); // We are going to use database_manager services
stats_temp_table_drop();
$tables = array();
/// Define tables user to be created
$table = new xmldb_table('temp_stats_daily');
$table->add_field('id', XMLDB_TYPE_INTEGER, '10', null, XMLDB_NOTNULL, XMLDB_SEQUENCE, null);
$table->add_field('courseid', XMLDB_TYPE_INTEGER, 10, null, XMLDB_NOTNULL, null, '0');
$table->add_field('timeend', XMLDB_TYPE_INTEGER, 10, null, XMLDB_NOTNULL, null, '0');
$table->add_field('roleid', XMLDB_TYPE_INTEGER, 10, null, XMLDB_NOTNULL, null, '0');
$table->add_field('stattype', XMLDB_TYPE_CHAR, 20, null, XMLDB_NOTNULL, null, 'activity');
$table->add_field('stat1', XMLDB_TYPE_INTEGER, 10, null, XMLDB_NOTNULL, null, '0');
$table->add_field('stat2', XMLDB_TYPE_INTEGER, 10, null, XMLDB_NOTNULL, null, '0');
$table->add_key('primary', XMLDB_KEY_PRIMARY, array('id'));
$table->add_index('courseid', XMLDB_INDEX_NOTUNIQUE, array('courseid'));
$table->add_index('timeend', XMLDB_INDEX_NOTUNIQUE, array('timeend'));
$table->add_index('roleid', XMLDB_INDEX_NOTUNIQUE, array('roleid'));
$tables['temp_stats_daily'] = $table;
$table = new xmldb_table('temp_stats_user_daily');
$table->add_field('id', XMLDB_TYPE_INTEGER, '10', null, XMLDB_NOTNULL, XMLDB_SEQUENCE, null);
$table->add_field('courseid', XMLDB_TYPE_INTEGER, 10, null, XMLDB_NOTNULL, null, '0');
$table->add_field('userid', XMLDB_TYPE_INTEGER, 10, null, XMLDB_NOTNULL, null, '0');
$table->add_field('roleid', XMLDB_TYPE_INTEGER, 10, null, XMLDB_NOTNULL, null, '0');
$table->add_field('timeend', XMLDB_TYPE_INTEGER, 10, null, XMLDB_NOTNULL, null, '0');
$table->add_field('statsreads', XMLDB_TYPE_INTEGER, 10, null, XMLDB_NOTNULL, null, '0');
$table->add_field('statswrites', XMLDB_TYPE_INTEGER, 10, null, XMLDB_NOTNULL, null, '0');
$table->add_field('stattype', XMLDB_TYPE_CHAR, 30, null, XMLDB_NOTNULL, null, null);
$table->add_key('primary', XMLDB_KEY_PRIMARY, array('id'));
$table->add_index('courseid', XMLDB_INDEX_NOTUNIQUE, array('courseid'));
$table->add_index('userid', XMLDB_INDEX_NOTUNIQUE, array('userid'));
$table->add_index('timeend', XMLDB_INDEX_NOTUNIQUE, array('timeend'));
$table->add_index('roleid', XMLDB_INDEX_NOTUNIQUE, array('roleid'));
$tables['temp_stats_user_daily'] = $table;
$table = new xmldb_table('temp_enroled');
$table->add_field('id', XMLDB_TYPE_INTEGER, '10', null, XMLDB_NOTNULL, XMLDB_SEQUENCE, null);
$table->add_field('userid', XMLDB_TYPE_INTEGER, 10, null, XMLDB_NOTNULL, null, '0');
$table->add_field('courseid', XMLDB_TYPE_INTEGER, 10, null, XMLDB_NOTNULL, null, '0');
$table->add_field('roleid', XMLDB_TYPE_INTEGER, 10, null, XMLDB_NOTNULL, null, null);
$table->add_key('primary', XMLDB_KEY_PRIMARY, array('id'));
$table->add_index('userid', XMLDB_INDEX_NOTUNIQUE, array('userid'));
$table->add_index('courseid', XMLDB_INDEX_NOTUNIQUE, array('courseid'));
$table->add_index('roleid', XMLDB_INDEX_NOTUNIQUE, array('roleid'));
$tables['temp_enroled'] = $table;
$table = new xmldb_table('temp_log1');
$table->add_field('id', XMLDB_TYPE_INTEGER, '10', null, XMLDB_NOTNULL, XMLDB_SEQUENCE, null);
$table->add_field('userid', XMLDB_TYPE_INTEGER, 10, null, XMLDB_NOTNULL, null, '0');
$table->add_field('course', XMLDB_TYPE_INTEGER, 10, null, XMLDB_NOTNULL, null, '0');
$table->add_field('action', XMLDB_TYPE_CHAR, 40, null, XMLDB_NOTNULL, null, null);
$table->add_key('primary', XMLDB_KEY_PRIMARY, array('id'));
$table->add_index('action', XMLDB_INDEX_NOTUNIQUE, array('action'));
$table->add_index('course', XMLDB_INDEX_NOTUNIQUE, array('course'));
$table->add_index('user', XMLDB_INDEX_NOTUNIQUE, array('userid'));
$table->add_index('usercourseaction', XMLDB_INDEX_NOTUNIQUE, array('userid','course','action'));
$tables['temp_log1'] = $table;
/// temp_log2 is exactly the same as temp_log1.
$tables['temp_log2'] = clone $tables['temp_log1'];
$tables['temp_log2']->setName('temp_log2');
try {
foreach ($tables as $table) {
$dbman->create_temp_table($table);
}
} catch (Exception $e) {
mtrace('Temporary table creation failed: '. $e->getMessage());
return false;
}
return true;
}
/**
* Deletes summary logs table for stats calculation
*/
function stats_temp_table_drop() {
global $DB;
$dbman = $DB->get_manager();
$tables = array('temp_log1', 'temp_log2', 'temp_stats_daily', 'temp_stats_user_daily', 'temp_enroled');
foreach ($tables as $name) {
if ($dbman->table_exists($name)) {
$table = new xmldb_table($name);
try {
$dbman->drop_table($table);
} catch (Exception $e) {
mtrace("Error occured while dropping temporary tables!");
}
}
}
}
/**
* Fills the temporary stats tables with new data
*
* This function is meant to be called once at the start of stats generation
*
* @param int timestart timestamp of the start time of logs view
* @param int timeend timestamp of the end time of logs view
* @return bool success (true) or failure(false)
*/
function stats_temp_table_setup() {
global $DB;
$sql = "INSERT INTO {temp_enroled} (userid, courseid, roleid)
SELECT ue.userid, e.courseid, ra.roleid
FROM {role_assignments} ra
JOIN {context} c ON (c.id = ra.contextid AND c.contextlevel = :courselevel)
JOIN {enrol} e ON e.courseid = c.instanceid
JOIN {user_enrolments} ue ON (ue.enrolid = e.id AND ue.userid = ra.userid)";
return stats_run_query($sql, array('courselevel' => CONTEXT_COURSE));
}
/**
* Fills the temporary stats tables with new data
*
* This function is meant to be called to get a new day of data
*
* @param int timestamp of the start time of logs view
* @param int timestamp of the end time of logs view
* @return bool success (true) or failure(false)
*/
function stats_temp_table_fill($timestart, $timeend) {
global $DB;
// First decide from where we want the data.
$params = array('timestart' => $timestart,
'timeend' => $timeend,
'participating' => \core\event\base::LEVEL_PARTICIPATING,
'teaching' => \core\event\base::LEVEL_TEACHING,
'loginevent1' => '\core\event\user_loggedin',
'loginevent2' => '\core\event\user_loggedin',
);
$filled = false;
$manager = get_log_manager();
$stores = $manager->get_readers();
foreach ($stores as $store) {
if ($store instanceof \core\log\sql_internal_table_reader) {
$logtable = $store->get_internal_log_table_name();
if (!$logtable) {
continue;
}
$sql = "SELECT COUNT('x')
FROM {{$logtable}}
WHERE timecreated >= :timestart AND timecreated < :timeend";
if (!$DB->get_field_sql($sql, $params)) {
continue;
}
// Let's fake the old records using new log data.
// We want only data relevant to educational process
// done by real users.
$sql = "INSERT INTO {temp_log1} (userid, course, action)
SELECT userid,
CASE
WHEN courseid IS NULL THEN ".SITEID."
WHEN courseid = 0 THEN ".SITEID."
ELSE courseid
END,
CASE
WHEN eventname = :loginevent1 THEN 'login'
WHEN crud = 'r' THEN 'view'
ELSE 'update'
END
FROM {{$logtable}}
WHERE timecreated >= :timestart AND timecreated < :timeend
AND (origin = 'web' OR origin = 'ws')
AND (edulevel = :participating OR edulevel = :teaching OR eventname = :loginevent2)";
$DB->execute($sql, $params);
$filled = true;
}
}
if (!$filled) {
// Fallback to legacy data.
$sql = "INSERT INTO {temp_log1} (userid, course, action)
SELECT userid, course, action
FROM {log}
WHERE time >= :timestart AND time < :timeend";
$DB->execute($sql, $params);
}
$sql = 'INSERT INTO {temp_log2} (userid, course, action)
SELECT userid, course, action FROM {temp_log1}';
$DB->execute($sql);
// We have just loaded all the temp tables, collect statistics for that.
$DB->update_temp_table_stats();
return true;
}
/**
* Deletes summary logs table for stats calculation
*
* @return bool success (true) or failure(false)
*/
function stats_temp_table_clean() {
global $DB;
$sql = array();
$sql['up1'] = 'INSERT INTO {stats_daily} (courseid, roleid, stattype, timeend, stat1, stat2)
SELECT courseid, roleid, stattype, timeend, stat1, stat2 FROM {temp_stats_daily}';
$sql['up2'] = 'INSERT INTO {stats_user_daily}
(courseid, userid, roleid, timeend, statsreads, statswrites, stattype)
SELECT courseid, userid, roleid, timeend, statsreads, statswrites, stattype
FROM {temp_stats_user_daily}';
foreach ($sql as $id => $query) {
if (! stats_run_query($query)) {
mtrace("Error during table cleanup!");
return false;
}
}
$tables = array('temp_log1', 'temp_log2', 'temp_stats_daily', 'temp_stats_user_daily');
foreach ($tables as $name) {
$DB->delete_records($name);
}
return true;
}