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Differences Between: [Versions 310 and 402] [Versions 311 and 402] [Versions 39 and 402] [Versions 400 and 402] [Versions 401 and 402]

   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  /**
  18   * This file contains functions used by the log reports
  19   *
  20   * This files lists the functions that are used during the log report generation.
  21   *
  22   * @package    report_log
  23   * @copyright  1999 onwards Martin Dougiamas (http://dougiamas.com)
  24   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  25   */
  26  
  27  defined('MOODLE_INTERNAL') || die;
  28  
  29  if (!defined('REPORT_LOG_MAX_DISPLAY')) {
  30      define('REPORT_LOG_MAX_DISPLAY', 150); // days
  31  }
  32  
  33  require_once (__DIR__.'/lib.php');
  34  
  35  /**
  36   * This function is used to generate and display the log activity graph
  37   *
  38   * @global stdClass $CFG
  39   * @param  stdClass $course course instance
  40   * @param  int|stdClass    $user id/object of the user whose logs are needed
  41   * @param  string $typeormode type of logs graph needed (usercourse.png/userday.png) or the mode (today, all).
  42   * @param  int $date timestamp in GMT (seconds since epoch)
  43   * @param  string $logreader Log reader.
  44   * @return void
  45   */
  46  function report_log_print_graph($course, $user, $typeormode, $date=0, $logreader='') {
  47      global $CFG, $OUTPUT;
  48  
  49      if (!is_object($user)) {
  50          $user = core_user::get_user($user);
  51      }
  52  
  53      $logmanager = get_log_manager();
  54      $readers = $logmanager->get_readers();
  55  
  56      if (empty($logreader)) {
  57          $reader = reset($readers);
  58      } else {
  59          $reader = $readers[$logreader];
  60      }
  61      // If reader is not a sql_internal_table_reader and not legacy store then don't show graph.
  62      if (!($reader instanceof \core\log\sql_internal_table_reader)) {
  63          return array();
  64      }
  65      $coursecontext = context_course::instance($course->id);
  66  
  67      $a = new stdClass();
  68      $a->coursename = format_string($course->shortname, true, array('context' => $coursecontext));
  69      $a->username = fullname($user, true);
  70  
  71      if ($typeormode == 'today' || $typeormode == 'userday.png') {
  72          $logs = report_log_usertoday_data($course, $user, $date, $logreader);
  73          $title = get_string("hitsoncoursetoday", "", $a);
  74      } else if ($typeormode == 'all' || $typeormode == 'usercourse.png') {
  75          $logs = report_log_userall_data($course, $user, $logreader);
  76          $title = get_string("hitsoncourse", "", $a);
  77      }
  78  
  79      if (!empty($CFG->preferlinegraphs)) {
  80          $chart = new \core\chart_line();
  81      } else {
  82          $chart = new \core\chart_bar();
  83      }
  84  
  85      $series = new \core\chart_series(get_string("hits"), $logs['series']);
  86      $chart->add_series($series);
  87      $chart->set_title($title);
  88      $chart->set_labels($logs['labels']);
  89      $yaxis = $chart->get_yaxis(0, true);
  90      $yaxis->set_label(get_string("hits"));
  91      $yaxis->set_stepsize(max(1, round(max($logs['series']) / 10)));
  92  
  93      echo $OUTPUT->render($chart);
  94  }
  95  
  96  /**
  97   * Select all log records for a given course and user
  98   *
  99   * @param int $userid The id of the user as found in the 'user' table.
 100   * @param int $courseid The id of the course as found in the 'course' table.
 101   * @param string $coursestart unix timestamp representing course start date and time.
 102   * @param string $logreader log reader to use.
 103   * @return array
 104   */
 105  function report_log_usercourse($userid, $courseid, $coursestart, $logreader = '') {
 106      global $DB;
 107  
 108      $logmanager = get_log_manager();
 109      $readers = $logmanager->get_readers();
 110      if (empty($logreader)) {
 111          $reader = reset($readers);
 112      } else {
 113          $reader = $readers[$logreader];
 114      }
 115  
 116      // If reader is not a sql_internal_table_reader and not legacy store then return.
 117      if (!($reader instanceof \core\log\sql_internal_table_reader)) {
 118          return array();
 119      }
 120  
 121      $coursestart = (int)$coursestart; // Note: unfortunately pg complains if you use name parameter or column alias in GROUP BY.
 122      $logtable = $reader->get_internal_log_table_name();
 123      $timefield = 'timecreated';
 124      $coursefield = 'courseid';
 125      $nonanonymous = 'AND anonymous = 0';
 126  
 127      $params = array();
 128      $courseselect = '';
 129      if ($courseid) {
 130          $courseselect = "AND $coursefield = :courseid";
 131          $params['courseid'] = $courseid;
 132      }
 133      $params['userid'] = $userid;
 134      return $DB->get_records_sql("SELECT FLOOR(($timefield - $coursestart)/" . DAYSECS . ") AS day, COUNT(*) AS num
 135                                     FROM {" . $logtable . "}
 136                                    WHERE userid = :userid
 137                                          AND $timefield > $coursestart $courseselect $nonanonymous
 138                                 GROUP BY FLOOR(($timefield - $coursestart)/" . DAYSECS .")", $params);
 139  }
 140  
 141  /**
 142   * Select all log records for a given course, user, and day
 143   *
 144   * @param int $userid The id of the user as found in the 'user' table.
 145   * @param int $courseid The id of the course as found in the 'course' table.
 146   * @param string $daystart unix timestamp of the start of the day for which the logs needs to be retrived
 147   * @param string $logreader log reader to use.
 148   * @return array
 149   */
 150  function report_log_userday($userid, $courseid, $daystart, $logreader = '') {
 151      global $DB;
 152      $logmanager = get_log_manager();
 153      $readers = $logmanager->get_readers();
 154      if (empty($logreader)) {
 155          $reader = reset($readers);
 156      } else {
 157          $reader = $readers[$logreader];
 158      }
 159  
 160      // If reader is not a sql_internal_table_reader and not legacy store then return.
 161      if (!($reader instanceof \core\log\sql_internal_table_reader)) {
 162          return array();
 163      }
 164  
 165      $daystart = (int)$daystart; // Note: unfortunately pg complains if you use name parameter or column alias in GROUP BY.
 166  
 167      $logtable = $reader->get_internal_log_table_name();
 168      $timefield = 'timecreated';
 169      $coursefield = 'courseid';
 170      $nonanonymous = 'AND anonymous = 0';
 171      $params = array('userid' => $userid);
 172  
 173      $courseselect = '';
 174      if ($courseid) {
 175          $courseselect = "AND $coursefield = :courseid";
 176          $params['courseid'] = $courseid;
 177      }
 178      return $DB->get_records_sql("SELECT FLOOR(($timefield - $daystart)/" . HOURSECS . ") AS hour, COUNT(*) AS num
 179                                     FROM {" . $logtable . "}
 180                                    WHERE userid = :userid
 181                                          AND $timefield > $daystart $courseselect $nonanonymous
 182                                 GROUP BY FLOOR(($timefield - $daystart)/" . HOURSECS . ") ", $params);
 183  }
 184  
 185  /**
 186   * This function is used to generate and display Mnet selector form
 187   *
 188   * @global stdClass $USER
 189   * @global stdClass $CFG
 190   * @global stdClass $SITE
 191   * @global moodle_database $DB
 192   * @global core_renderer $OUTPUT
 193   * @global stdClass $SESSION
 194   * @uses CONTEXT_SYSTEM
 195   * @uses COURSE_MAX_COURSES_PER_DROPDOWN
 196   * @uses CONTEXT_COURSE
 197   * @uses SEPARATEGROUPS
 198   * @param  int      $hostid host id
 199   * @param  stdClass $course course instance
 200   * @param  int      $selecteduser id of the selected user
 201   * @param  string   $selecteddate Date selected
 202   * @param  string   $modname course_module->id
 203   * @param  string   $modid number or 'site_errors'
 204   * @param  string   $modaction an action as recorded in the logs
 205   * @param  int      $selectedgroup Group to display
 206   * @param  int      $showcourses whether to show courses if we're over our limit.
 207   * @param  int      $showusers whether to show users if we're over our limit.
 208   * @param  string   $logformat Format of the logs (downloadascsv, showashtml, downloadasods, downloadasexcel)
 209   * @return void
 210   */
 211  function report_log_print_mnet_selector_form($hostid, $course, $selecteduser=0, $selecteddate='today',
 212                                   $modname="", $modid=0, $modaction='', $selectedgroup=-1, $showcourses=0, $showusers=0, $logformat='showashtml') {
 213  
 214      global $USER, $CFG, $SITE, $DB, $OUTPUT, $SESSION;
 215      require_once $CFG->dirroot.'/mnet/peer.php';
 216  
 217      $mnet_peer = new mnet_peer();
 218      $mnet_peer->set_id($hostid);
 219  
 220      $sql = "SELECT DISTINCT course, hostid, coursename FROM {mnet_log}";
 221      $courses = $DB->get_records_sql($sql);
 222      $remotecoursecount = count($courses);
 223  
 224      // first check to see if we can override showcourses and showusers
 225      $numcourses = $remotecoursecount + $DB->count_records('course');
 226      if ($numcourses < COURSE_MAX_COURSES_PER_DROPDOWN && !$showcourses) {
 227          $showcourses = 1;
 228      }
 229  
 230      $sitecontext = context_system::instance();
 231  
 232      // Context for remote data is always SITE
 233      // Groups for remote data are always OFF
 234      if ($hostid == $CFG->mnet_localhost_id) {
 235          $context = context_course::instance($course->id);
 236  
 237          /// Setup for group handling.
 238          if ($course->groupmode == SEPARATEGROUPS and !has_capability('moodle/site:accessallgroups', $context)) {
 239              $selectedgroup = -1;
 240              $showgroups = false;
 241          } else if ($course->groupmode) {
 242              $showgroups = true;
 243          } else {
 244              $selectedgroup = 0;
 245              $showgroups = false;
 246          }
 247  
 248          if ($selectedgroup === -1) {
 249              if (isset($SESSION->currentgroup[$course->id])) {
 250                  $selectedgroup =  $SESSION->currentgroup[$course->id];
 251              } else {
 252                  $selectedgroup = groups_get_all_groups($course->id, $USER->id);
 253                  if (is_array($selectedgroup)) {
 254                      $selectedgroup = array_shift(array_keys($selectedgroup));
 255                      $SESSION->currentgroup[$course->id] = $selectedgroup;
 256                  } else {
 257                      $selectedgroup = 0;
 258                  }
 259              }
 260          }
 261  
 262      } else {
 263          $context = $sitecontext;
 264      }
 265  
 266      // Get all the possible users
 267      $users = array();
 268  
 269      // Define limitfrom and limitnum for queries below
 270      // If $showusers is enabled... don't apply limitfrom and limitnum
 271      $limitfrom = empty($showusers) ? 0 : '';
 272      $limitnum  = empty($showusers) ? COURSE_MAX_USERS_PER_DROPDOWN + 1 : '';
 273  
 274      // If looking at a different host, we're interested in all our site users
 275      if ($hostid == $CFG->mnet_localhost_id && $course->id != SITEID) {
 276          $userfieldsapi = \core_user\fields::for_name();
 277          $courseusers = get_enrolled_users($context, '', $selectedgroup, 'u.id, ' .
 278                  $userfieldsapi->get_sql('u', false, '', '', false)->selects,
 279                  null, $limitfrom, $limitnum);
 280      } else {
 281          // this may be a lot of users :-(
 282          $userfieldsapi = \core_user\fields::for_name();
 283          $courseusers = $DB->get_records('user', array('deleted' => 0), 'lastaccess DESC', 'id, ' .
 284                  $userfieldsapi->get_sql('', false, '', '', false)->selects,
 285                  $limitfrom, $limitnum);
 286      }
 287  
 288      if (count($courseusers) < COURSE_MAX_USERS_PER_DROPDOWN && !$showusers) {
 289          $showusers = 1;
 290      }
 291  
 292      if ($showusers) {
 293          if ($courseusers) {
 294              foreach ($courseusers as $courseuser) {
 295                  $users[$courseuser->id] = fullname($courseuser, has_capability('moodle/site:viewfullnames', $context));
 296              }
 297          }
 298          $users[$CFG->siteguest] = get_string('guestuser');
 299      }
 300  
 301      // Get all the hosts that have log records
 302      $sql = "select distinct
 303                  h.id,
 304                  h.name
 305              from
 306                  {mnet_host} h,
 307                  {mnet_log} l
 308              where
 309                  h.id = l.hostid
 310              order by
 311                  h.name";
 312  
 313      if ($hosts = $DB->get_records_sql($sql)) {
 314          foreach($hosts as $host) {
 315              $hostarray[$host->id] = $host->name;
 316          }
 317      }
 318  
 319      $hostarray[$CFG->mnet_localhost_id] = $SITE->fullname;
 320      asort($hostarray);
 321  
 322      $dropdown = array();
 323  
 324      foreach($hostarray as $hostid => $name) {
 325          $courses = array();
 326          $sites = array();
 327          if ($CFG->mnet_localhost_id == $hostid) {
 328              if (has_capability('report/log:view', $sitecontext) && $showcourses) {
 329                  if ($ccc = $DB->get_records("course", null, "fullname","id,shortname,fullname,category")) {
 330                      foreach ($ccc as $cc) {
 331                          if ($cc->id == SITEID) {
 332                              $sites["$hostid/$cc->id"]   = format_string($cc->fullname).' ('.get_string('site').')';
 333                          } else {
 334                              $courses["$hostid/$cc->id"] = format_string(get_course_display_name_for_list($cc));
 335                          }
 336                      }
 337                  }
 338              }
 339          } else {
 340              if (has_capability('report/log:view', $sitecontext) && $showcourses) {
 341                  $sql = "SELECT DISTINCT course, coursename FROM {mnet_log} where hostid = ?";
 342                  if ($ccc = $DB->get_records_sql($sql, array($hostid))) {
 343                      foreach ($ccc as $cc) {
 344                          if (1 == $cc->course) { // TODO: this might be wrong - site course may have another id
 345                              $sites["$hostid/$cc->course"]   = $cc->coursename.' ('.get_string('site').')';
 346                          } else {
 347                              $courses["$hostid/$cc->course"] = $cc->coursename;
 348                          }
 349                      }
 350                  }
 351              }
 352          }
 353  
 354          asort($courses);
 355          $dropdown[] = array($name=>($sites + $courses));
 356      }
 357  
 358  
 359      $activities = array();
 360      $selectedactivity = "";
 361  
 362      $modinfo = get_fast_modinfo($course);
 363      if (!empty($modinfo->cms)) {
 364          $section = 0;
 365          $thissection = array();
 366          foreach ($modinfo->cms as $cm) {
 367              // Exclude activities that aren't visible or have no view link (e.g. label). Account for folder being displayed inline.
 368              if (!$cm->uservisible || (!$cm->has_view() && strcmp($cm->modname, 'folder') !== 0)) {
 369                  continue;
 370              }
 371              if ($cm->sectionnum > 0 and $section <> $cm->sectionnum) {
 372                  $activities[] = $thissection;
 373                  $thissection = array();
 374              }
 375              $section = $cm->sectionnum;
 376              $modname = strip_tags($cm->get_formatted_name());
 377              if (core_text::strlen($modname) > 55) {
 378                  $modname = core_text::substr($modname, 0, 50)."...";
 379              }
 380              if (!$cm->visible) {
 381                  $modname = "(".$modname.")";
 382              }
 383              $key = get_section_name($course, $cm->sectionnum);
 384              if (!isset($thissection[$key])) {
 385                  $thissection[$key] = array();
 386              }
 387              $thissection[$key][$cm->id] = $modname;
 388  
 389              if ($cm->id == $modid) {
 390                  $selectedactivity = "$cm->id";
 391              }
 392          }
 393          if (!empty($thissection)) {
 394              $activities[] = $thissection;
 395          }
 396      }
 397  
 398      if (has_capability('report/log:view', $sitecontext) && !$course->category) {
 399          $activities["site_errors"] = get_string("siteerrors");
 400          if ($modid === "site_errors") {
 401              $selectedactivity = "site_errors";
 402          }
 403      }
 404  
 405      $strftimedate = get_string("strftimedate");
 406      $strftimedaydate = get_string("strftimedaydate");
 407  
 408      asort($users);
 409  
 410      // Prepare the list of action options.
 411      $actions = array(
 412          'view' => get_string('view'),
 413          'add' => get_string('add'),
 414          'update' => get_string('update'),
 415          'delete' => get_string('delete'),
 416          '-view' => get_string('allchanges')
 417      );
 418  
 419      // Get all the possible dates
 420      // Note that we are keeping track of real (GMT) time and user time
 421      // User time is only used in displays - all calcs and passing is GMT
 422  
 423      $timenow = time(); // GMT
 424  
 425      // What day is it now for the user, and when is midnight that day (in GMT).
 426      $timemidnight = $today = usergetmidnight($timenow);
 427  
 428      // Put today up the top of the list
 429      $dates = array(
 430          "0" => get_string('alldays'),
 431          "$timemidnight" => get_string("today").", ".userdate($timenow, $strftimedate)
 432      );
 433  
 434      if (!$course->startdate or ($course->startdate > $timenow)) {
 435          $course->startdate = $course->timecreated;
 436      }
 437  
 438      $numdates = 1;
 439      while ($timemidnight > $course->startdate and $numdates < 365) {
 440          $timemidnight = $timemidnight - 86400;
 441          $timenow = $timenow - 86400;
 442          $dates["$timemidnight"] = userdate($timenow, $strftimedaydate);
 443          $numdates++;
 444      }
 445  
 446      if ($selecteddate === "today") {
 447          $selecteddate = $today;
 448      }
 449  
 450      echo "<form class=\"logselectform\" action=\"$CFG->wwwroot/report/log/index.php\" method=\"get\">\n";
 451      echo "<div>\n";//invisible fieldset here breaks wrapping
 452      echo "<input type=\"hidden\" name=\"chooselog\" value=\"1\" />\n";
 453      echo "<input type=\"hidden\" name=\"showusers\" value=\"$showusers\" />\n";
 454      echo "<input type=\"hidden\" name=\"showcourses\" value=\"$showcourses\" />\n";
 455      if (has_capability('report/log:view', $sitecontext) && $showcourses) {
 456          $cid = empty($course->id)? '1' : $course->id;
 457          echo html_writer::label(get_string('selectacoursesite'), 'menuhost_course', false, array('class' => 'accesshide'));
 458          echo html_writer::select($dropdown, "host_course", $hostid.'/'.$cid);
 459      } else {
 460          $courses = array();
 461          $courses[$course->id] = get_course_display_name_for_list($course) . ((empty($course->category)) ? ' ('.get_string('site').') ' : '');
 462          echo html_writer::label(get_string('selectacourse'), 'menuid', false, array('class' => 'accesshide'));
 463          echo html_writer::select($courses,"id",$course->id, false);
 464          if (has_capability('report/log:view', $sitecontext)) {
 465              $a = new stdClass();
 466              $a->url = "$CFG->wwwroot/report/log/index.php?chooselog=0&group=$selectedgroup&user=$selecteduser"
 467                  ."&id=$course->id&date=$selecteddate&modid=$selectedactivity&showcourses=1&showusers=$showusers";
 468              print_string('logtoomanycourses','moodle',$a);
 469          }
 470      }
 471  
 472      if ($showgroups) {
 473          if ($cgroups = groups_get_all_groups($course->id)) {
 474              foreach ($cgroups as $cgroup) {
 475                  $groups[$cgroup->id] = $cgroup->name;
 476              }
 477          }
 478          else {
 479              $groups = array();
 480          }
 481          echo html_writer::label(get_string('selectagroup'), 'menugroup', false, array('class' => 'accesshide'));
 482          echo html_writer::select($groups, "group", $selectedgroup, get_string("allgroups"));
 483      }
 484  
 485      if ($showusers) {
 486          echo html_writer::label(get_string('participantslist'), 'menuuser', false, array('class' => 'accesshide'));
 487          echo html_writer::select($users, "user", $selecteduser, get_string("allparticipants"));
 488      }
 489      else {
 490          $users = array();
 491          if (!empty($selecteduser)) {
 492              $user = $DB->get_record('user', array('id'=>$selecteduser));
 493              $users[$selecteduser] = fullname($user);
 494          }
 495          else {
 496              $users[0] = get_string('allparticipants');
 497          }
 498          echo html_writer::label(get_string('participantslist'), 'menuuser', false, array('class' => 'accesshide'));
 499          echo html_writer::select($users, "user", $selecteduser, false);
 500          $a = new stdClass();
 501          $a->url = "$CFG->wwwroot/report/log/index.php?chooselog=0&group=$selectedgroup&user=$selecteduser"
 502              ."&id=$course->id&date=$selecteddate&modid=$selectedactivity&showusers=1&showcourses=$showcourses";
 503          print_string('logtoomanyusers','moodle',$a);
 504      }
 505  
 506      echo html_writer::label(get_string('date'), 'menudate', false, array('class' => 'accesshide'));
 507      echo html_writer::select($dates, "date", $selecteddate, false);
 508      echo html_writer::label(get_string('showreports'), 'menumodid', false, array('class' => 'accesshide'));
 509      echo html_writer::select($activities, "modid", $selectedactivity, get_string("allactivities"));
 510      echo html_writer::label(get_string('actions'), 'menumodaction', false, array('class' => 'accesshide'));
 511      echo html_writer::select($actions, 'modaction', $modaction, get_string("allactions"));
 512  
 513      $logformats = array('showashtml' => get_string('displayonpage'),
 514                          'downloadascsv' => get_string('downloadtext'),
 515                          'downloadasods' => get_string('downloadods'),
 516                          'downloadasexcel' => get_string('downloadexcel'));
 517      echo html_writer::label(get_string('logsformat', 'report_log'), 'menulogformat', false, array('class' => 'accesshide'));
 518      echo html_writer::select($logformats, 'logformat', $logformat, false);
 519      echo '<input type="submit" value="'.get_string('gettheselogs').'" />';
 520      echo '</div>';
 521      echo '</form>';
 522  }
 523  
 524  /**
 525   * Fetch logs since the start of the courses and structure in series and labels to be sent to Chart API.
 526   *
 527   * @param stdClass $course the course object
 528   * @param stdClass $user user object
 529   * @param string $logreader the log reader where the logs are.
 530   * @return array structured array to be sent to chart API, split in two indexes (series and labels).
 531   */
 532  function report_log_userall_data($course, $user, $logreader) {
 533      global $CFG;
 534      $site = get_site();
 535      $timenow = time();
 536      $logs = [];
 537      if ($course->id == $site->id) {
 538          $courseselect = 0;
 539      } else {
 540          $courseselect = $course->id;
 541      }
 542  
 543      $maxseconds = REPORT_LOG_MAX_DISPLAY * 3600 * 24;  // Seconds.
 544      if ($timenow - $course->startdate > $maxseconds) {
 545          $course->startdate = $timenow - $maxseconds;
 546      }
 547  
 548      if (!empty($CFG->loglifetime)) {
 549          $maxseconds = $CFG->loglifetime * 3600 * 24;  // Seconds.
 550          if ($timenow - $course->startdate > $maxseconds) {
 551              $course->startdate = $timenow - $maxseconds;
 552          }
 553      }
 554  
 555      $timestart = $coursestart = usergetmidnight($course->startdate);
 556  
 557      $i = 0;
 558      $logs['series'][$i] = 0;
 559      $logs['labels'][$i] = 0;
 560      while ($timestart < $timenow) {
 561          $timefinish = $timestart + 86400;
 562          $logs['labels'][$i] = userdate($timestart, "%a %d %b");
 563          $logs['series'][$i] = 0;
 564          $i++;
 565          $timestart = $timefinish;
 566      }
 567      $rawlogs = report_log_usercourse($user->id, $courseselect, $coursestart, $logreader);
 568  
 569      foreach ($rawlogs as $rawlog) {
 570          if (isset($logs['labels'][$rawlog->day])) {
 571              $logs['series'][$rawlog->day] = $rawlog->num;
 572          }
 573      }
 574  
 575      return $logs;
 576  }
 577  
 578  /**
 579   * Fetch logs of the current day and structure in series and labels to be sent to Chart API.
 580   *
 581   * @param stdClass $course the course object
 582   * @param stdClass $user user object
 583   * @param int $date A time of a day (in GMT).
 584   * @param string $logreader the log reader where the logs are.
 585   * @return array $logs structured array to be sent to chart API, split in two indexes (series and labels).
 586   */
 587  function report_log_usertoday_data($course, $user, $date, $logreader) {
 588      $site = get_site();
 589      $logs = [];
 590  
 591      if ($course->id == $site->id) {
 592          $courseselect = 0;
 593      } else {
 594          $courseselect = $course->id;
 595      }
 596  
 597      if ($date) {
 598          $daystart = usergetmidnight($date);
 599      } else {
 600          $daystart = usergetmidnight(time());
 601      }
 602  
 603      for ($i = 0; $i <= 23; $i++) {
 604          $hour = $daystart + $i * 3600;
 605          $logs['series'][$i] = 0;
 606          $logs['labels'][$i] = userdate($hour, "%H:00");
 607      }
 608  
 609      $rawlogs = report_log_userday($user->id, $courseselect, $daystart, $logreader);
 610  
 611      foreach ($rawlogs as $rawlog) {
 612          if (isset($logs['labels'][$rawlog->hour])) {
 613              $logs['series'][$rawlog->hour] = $rawlog->num;
 614          }
 615      }
 616  
 617      return $logs;
 618  }