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<?PHP // $Id$
// Produces a graph of log accesses
require("../config.php");
require("lib.php");
require("$CFG->libdir/graphlib.php");
require_variable($id); // Course ID
require_variable($type); // Graph Type
optional_variable($user); // Student ID
optional_variable($date); // A time of a day (in GMT)
if (! $course = get_record("course", "id", $id)) {
error("Course is misconfigured");
}
require_login($course->id);
if (!isteacher($course->id)) {
if (! ($type == "usercourse.png" and $user == $USER->id) ) {
error("Sorry, you aren't allowed to see this.");
}
}
if ($user) {
if (! $user = get_record("user", "id", $user)) {
error("Can not find that user");
}
}
$timenow = time();
switch ($type) {
case "usercourse.png":
$COURSE_MAX_LOG_DISPLAY = $COURSE_MAX_LOG_DISPLAY * 3600 * 24; // seconds
if ($timenow - $course->startdate > $COURSE_MAX_LOG_DISPLAY) {
$course->startdate = $timenow - $COURSE_MAX_LOG_DISPLAY;
}
$timestart = $coursestart = usergetmidnight($course->startdate);
$i = 0;
while ($timestart < $timenow) {
$timefinish = $timestart + 86400;
$days[$i] = userdate($timestart, "%a %d %b");
$logs[$i] = 0;
$i++;
$timestart = $timefinish;
}
if ($rawlogs = get_records_sql("SELECT floor((`time` - $coursestart)/86400) as day,
count(*) as num FROM log
WHERE user = '$user->id'
AND course = '$course->id'
AND `time` > '$coursestart'
GROUP BY day ")) {
foreach ($rawlogs as $rawlog) {
$logs[$rawlog->day] = $rawlog->num;
}
}
$maxlogs = max($logs);
$graph = new graph(750, 400);
$a->coursename = $course->shortname;
$a->username = "$user->firstname $user->lastname";
$graph->parameter['title'] = get_string("hitsoncourse", "", $a);
$graph->x_data = $days;
$graph->y_data['logs'] = $logs;
$graph->y_format['logs'] = array('colour' => 'blue','line' => 'line');
$graph->y_label_left = get_string("hits");
$graph->label_size = "6";
$graph->y_order = array('logs');
$graph->parameter['shadow'] = 'none';
error_reporting(5);
$graph->draw_stack();
break;
case "userday.png":
if ($date) {
$daystart = usergetmidnight($date);
} else {
$daystart = usergetmidnight(time());
}
$dayfinish = $daystart + 86400;
for ($i=0; $i<=23; $i++) {
$logs[$i] = 0;
$hour = $daystart + $i * 3600;
$hh = (int)userdate($hour, "%I");
$hours[$i] = userdate($hour, "$hh %p");
}
if ($rawlogs = get_records_sql("SELECT floor((`time` - $daystart)/3600) as hour,
count(*) as num FROM log
WHERE user = '$user->id'
AND course = '$course->id'
AND `time` > '$daystart'
GROUP BY hour ")) {
foreach ($rawlogs as $rawlog) {
$logs[$rawlog->hour] = $rawlog->num;
}
}
$maxlogs = max($logs);
$graph = new graph(750, 400);
$a->coursename = $course->shortname;
$a->username = "$user->firstname $user->lastname";
$graph->parameter['title'] = get_string("hitsoncoursetoday", "", $a);
$graph->x_data = $hours;
$graph->y_data['logs'] = $logs;
$graph->y_format['logs'] = array('colour' => 'blue','bar' => 'fill','legend' =>'actual','bar_size' => 0.9);
$graph->y_label_left = get_string("hits");
$graph->label_size = "6";
$graph->y_order = array('logs');
$graph->parameter['shadow'] = 'none';
error_reporting(5);
$graph->draw_stack();
break;
default:
break;
}
?>
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