course/loggraph.php

   1 <?php // $Id$
   2       // Produces a graph of log accesses
   3
   4     require_once("../config.php");
   5     require_once("lib.php");
   6     require_once("$CFG->libdir/graphlib.php");
   7
   8     require_variable($id);    // Course ID
   9     require_variable($type);  // Graph Type
  10     optional_variable($user);  // Student ID
  11     optional_variable($date);  // A time of a day (in GMT)
  12
  13     if (! $course = get_record("course", "id", $id)) {
  14         error("Course is misconfigured");
  15     }
  16
  17     require_login($course->id);
  18
  19     if (! (isteacher($course->id) or ($course->showreports and $USER->id == $user))) {
  20         error("Sorry, you aren't allowed to see this.");
  21     }
  22
  23     if ($user) {
  24         if (! $user = get_record("user", "id", $user)) {
  25             error("Can not find that user");
  26         }
  27     }
  28
  29     $logs = array();
  30
  31     $timenow = time();
  32
  33     switch ($type) {
  34      case "usercourse.png":
  35
  36        $site = get_site();
  37
  38        if ($course->id == $site->id) {
  39            $courseselect = 0;
  40        } else {
  41            $courseselect = $course->id;
  42        }
  43
  44        $maxseconds = COURSE_MAX_LOG_DISPLAY * 3600 * 24;  // seconds
  45        //$maxseconds = 60 * 3600 * 24;  // seconds
  46        if ($timenow - $course->startdate > $maxseconds) {
  47            $course->startdate = $timenow - $maxseconds;
  48        }
  49
  50        if (!empty($CFG->loglifetime)) {
  51            $maxseconds = $CFG->loglifetime * 3600 * 24;  // seconds
  52            if ($timenow - $course->startdate > $maxseconds) {
  53                $course->startdate = $timenow - $maxseconds;
  54            }
  55        }
  56
  57        $timestart = $coursestart = usergetmidnight($course->startdate);
  58
  59        if ((($timenow - $timestart)/86400.0) > 40) {
  60            $reducedays = 7;
  61        } else {
  62            $reducedays = 0;
  63        }
  64
  65        $i = 0;
  66        while ($timestart < $timenow) {
  67            $timefinish = $timestart + 86400;
  68            if ($reducedays) {
  69                if ($i % $reducedays) {
  70                    $days[$i] = "";
  71                } else {
  72                    $days[$i] = userdate($timestart, "%a %d %b");
  73                }
  74            } else {
  75                $days[$i] = userdate($timestart, "%a %d %b");
  76            }
  77            $logs[$i] = 0;
  78            $i++;
  79            $timestart = $timefinish;
  80        }
  81
  82        if ($rawlogs = get_logs_usercourse($user->id, $courseselect, $coursestart)) {
  83            foreach ($rawlogs as $rawlog) {
  84                $logs[$rawlog->day] = $rawlog->num;
  85            }
  86        }
  87
  88        $graph = new graph(750, 400);
  89
  90        $a->coursename = $course->shortname;
  91        $a->username = fullname($user, true);
  92        $graph->parameter['title'] = get_string("hitsoncourse", "", $a);
  93
  94        $graph->x_data           = $days;
  95
  96        $graph->y_data['logs']   = $logs;
  97        $graph->y_order = array('logs');
  98
  99        if (!empty($CFG->preferlinegraphs)) {
 100            $graph->y_format['logs'] = array('colour' => 'blue','line' => 'line');
 101        } else {
 102            $graph->y_format['logs'] = array('colour' => 'blue','bar' => 'fill','bar_size' => 0.6);
 103            $graph->parameter['bar_spacing'] = 0;
 104        }
 105
 106
 107        $graph->parameter['y_label_left']     = get_string("hits");
 108        $graph->parameter['label_size']       = "12";
 109        $graph->parameter['x_axis_angle']     = 90;
 110        $graph->parameter['x_label_angle']    = 0;
 111        $graph->parameter['tick_length'] = 0;
 112
 113
 114        $graph->parameter['shadow']          = 'none';
 115
 116        error_reporting(5); // ignore most warnings such as font problems etc
 117        $graph->draw_stack();
 118
 119        break;
 120
 121      case "userday.png":
 122
 123        $site = get_site();
 124
 125        if ($course->id == $site->id) {
 126            $courseselect = 0;
 127        } else {
 128            $courseselect = $course->id;
 129        }
 130
 131        if ($date) {
 132            $daystart = usergetmidnight($date);
 133        } else {
 134            $daystart = usergetmidnight(time());
 135        }
 136        $dayfinish = $daystart + 86400;
 137
 138        for ($i=0; $i<=23; $i++) {
 139            $logs[$i] = 0;
 140            $hour = $daystart + $i * 3600;
 141            $hours[$i] = $i;
 142        }
 143
 144        if ($rawlogs = get_logs_userday($user->id, $courseselect, $daystart)) {
 145            foreach ($rawlogs as $rawlog) {
 146                $logs[$rawlog->hour] = $rawlog->num;
 147            }
 148        }
 149
 150        $graph = new graph(750, 400);
 151
 152        $a->coursename = $course->shortname;
 153        $a->username = fullname($user, true);
 154        $graph->parameter['title'] = get_string("hitsoncoursetoday", "", $a);
 155
 156        $graph->x_data           = $hours;
 157
 158        $graph->y_data['logs']   = $logs;
 159        $graph->y_order = array('logs');
 160
 161        if (!empty($CFG->preferlinegraphs)) {
 162            $graph->y_format['logs'] = array('colour' => 'blue','line' => 'line');
 163        } else {
 164            $graph->y_format['logs'] = array('colour' => 'blue','bar' => 'fill','bar_size' => 0.9);
 165        }
 166
 167        $graph->parameter['y_label_left']     = get_string("hits");
 168        $graph->parameter['label_size']       = "12";
 169        $graph->parameter['x_axis_angle']     = 0;
 170        $graph->parameter['x_label_angle']    = 0;
 171
 172        $graph->parameter['shadow']          = 'none';
 173
 174        error_reporting(5); // ignore most warnings such as font problems etc
 175        $graph->draw_stack();
 176
 177        break;
 178
 179      default:
 180        break;
 181    }
 182
 183 ?>