<?PHP  // $Id: manage.php,v 1.2.2.4 2009/02/28 19:20:14 dlnsk Exp $

/// This page prints a particular instance of attforblock
/// (Replace attforblock with the name of your module)

    require_once('../../config.php');
    require_once('locallib.php');

    $id         = required_param('id', PARAM_INT);   // Course Module ID, or
    $from       = optional_param('from', '', PARAM_ACTION);
    $view       = optional_param('view', NULL, PARAM_ALPHA);        // which page to show
    $current	= optional_param('current', 0, PARAM_INT);
    $showendtime       = optional_param('showendtime', get_user_preferences("attforblock_showendtime",0), PARAM_INT);
    if (! $cm = $DB->get_record('course_modules', array('id'=> $id))) {
        error('Course Module ID was incorrect');
    }

    if (! $course = $DB->get_record('course', array('id'=> $cm->course))) {
        error("Course is misconfigured");
    }

    if (! $attforblock = $DB->get_record('attforblock', array('id'=> $cm->instance))) {
        error("Course module is incorrect");
    }
    
    require_login($course->id);

    if (! $user = $DB->get_record('user', array('id'=> $USER->id) )) {
        error("No such user in this course");
    }
    
    if (!$context = get_context_instance(CONTEXT_MODULE, $cm->id)) {
        print_error('badcontext');
    }

    if ($view)
        set_current_view($course->id, $_GET['view']);
    else
	    $view = get_current_view($course->id);
    
    if (!has_capability('mod/attforblock:manageattendances', $context) AND
            !has_capability('mod/attforblock:takeattendances', $context) AND
            !has_capability('mod/attforblock:changeattendances', $context)) {
        redirect("view.php?id=$cm->id");
    }

    set_user_preference("attforblock_showendtime",$showendtime);

    //if teacher is coming from block, then check for a session exists for today
	if($from === 'block') {
		$today = time(); // because we compare with database, we don't need to use usertime()
        $sql = "SELECT id, groupid, lasttaken
                  FROM {attendance_sessions}
                 WHERE ? BETWEEN sessdate AND (sessdate + duration)
                   AND courseid = ? AND attendanceid = ?";
        if($atts = $DB->get_records_sql($sql, array($today, $course->id, $attforblock->id))) {
            $size = count($atts);
            if ($size == 1) {
                $att = reset($atts);
                if ((!$att->lasttaken and has_capability('mod/attforblock:takeattendances', $context)) or
                    ($att->lasttaken and has_capability('mod/attforblock:changeattendances', $context))) {
                    redirect('attendances.php?id='.$id.'&amp;sessionid='.$att->id.'&amp;grouptype='.$att->groupid);
                }
            } elseif ($size > 1) {
                $current = $today;
                //temporally set $view for single access to page from block
                $view = 'days';
            }
        }
	}
	
/// Print headers

    $url = new moodle_url('/mod/attforblock/manage.php', array('id'=> $id, 'from'=> $from, 'view' => $view, 'current' => $current, 'showendtime' => $showendtime));
    $PAGE->set_url($url);
    $PAGE->set_title($course->shortname. ": ".$attforblock->name);
    $PAGE->set_heading($course->fullname);
    $PAGE->set_focuscontrol('');
    $PAGE->set_cacheable(true);
    $PAGE->set_button($OUTPUT->update_module_button($cm->id,'attforblock'));
    $PAGE->navbar->add($attforblock->name);

    echo $OUTPUT->header();
    echo $OUTPUT->heading(get_string('attendanceforthecourse','attforblock').' :: ' .$course->fullname);
	
	if(!$DB->count_records_select('attendance_sessions', "courseid = ? AND attendanceid = ? AND sessdate >= ?", array($course->id, $attforblock->id, $course->startdate))) {	// no session exists for this course
		show_tabs($cm, $context);
		print_heading(get_string('nosessionexists','attforblock'));	
		$hiddensess = $DB->count_records_select('attendance_sessions', "courseid = ? AND attendanceid = ? AND sessdate < ?", array($course->id, $attforblock->id, $course->startdate));
        echo '<div align="left">'.helpbutton('hiddensessions', '--', 'attforblock', true, true, '', true); //TODO: fix '--'
        echo get_string('hiddensessions', 'attforblock').': '.$hiddensess.'</div>';
	} else {	//sessions generated , display them
		add_to_log($course->id, 'attendance', 'manage attendances', 'mod/attforblock/manage.php?course='.$course->id, $user->lastname.' '.$user->firstname);
		show_tabs($cm, $context);
		print_sessions_list($course, $attforblock);
	}
//	require_once('lib.php');
//	$t = attforblock_get_user_grades($attforblock); ////////////////////////////////////////////
	$OUTPUT->footer();//print_footer($course);
	
	
function print_sessions_list($course, $attforblock) {
	global $CFG, $context, $cm, $current, $view, $id, $showendtime, $DB, $OUTPUT;
	
        $strhours = get_string('hours');
        $strmins = get_string('min');

        if ($current == 0)
            $current = get_current_date($course->id);
        else
            set_current_date ($course->id, $current);

        $ret = print_filter_controls("manage.php", $id, 0, NULL, SESSION_TYPE_SELECTOR);
        $startdate = $ret['startdate'];
        $enddate = $ret['enddate'];
        $currentgroup = $ret['currentgroup'];

        if ($startdate && $enddate) {
            $where = "courseid=:cid AND attendanceid = :aid AND sessdate >= :sdate AND sessdate >= :sdate2 AND sessdate < :edate";
        } else {
            $where = "courseid=:cid AND attendanceid = :aid AND sessdate >= :sdate";
        }

        if ($currentgroup > -1) {
            $where .= " AND groupid=:cgroup";
        }

        $qry = $DB->get_records_select('attendance_sessions', $where, array('cid' => $course->id, 'aid' => $attforblock->id, 'sdate' => $course->startdate,'sdate2' => $startdate, 'edate'=> $enddate, 'cgroup'=> $currentgroup), 'sessdate asc');
        $i = 0;
        $table = new html_table();
        $table->width = '100%';
        //$table->tablealign = 'center';
        $table->head = array('#', get_string('sessiontypeshort', 'attforblock'), get_string('date'), get_string('from'), ($showendtime=='0') ? get_string('duration', 'attforblock') : get_string('to'), get_string('description','attforblock'), get_string('actions'), get_string('select'));
        $table->align = array('', '', '', 'right', 'left', 'center', 'center');
        $table->size = array('1px', '', '1px', '1px', '1px', '*', '1px', '1px');

        $allowtake = has_capability('mod/attforblock:takeattendances', $context);
        $allowchange = has_capability('mod/attforblock:changeattendances', $context);
        $allowmanage = has_capability('mod/attforblock:manageattendances', $context);
        $groups = groups_get_all_groups($course->id);
        if ($qry) {
            foreach($qry as $key=>$sessdata)
            {
                $i++;
                $actions = '';
//				if ($allowtake) {
                    if($sessdata->lasttaken > 0)	//attendance has taken
                    {
                        if ($allowchange) {
                            $desc = "<a href=\"attendances.php?id=$cm->id&amp;sessionid={$sessdata->id}&amp;grouptype={$sessdata->groupid}\">".
                                    ($sessdata->description ? $sessdata->description : get_string('nodescription', 'attforblock')).
                                    '</a>';
                        } else {
                            $desc = '<i>'.(empty($sessdata->description) ? get_string('nodescription', 'attforblock') : $sessdata->description).'</i>';
                        }
                    } else {
                        $desc = empty($sessdata->description) ? get_string('nodescription', 'attforblock') : $sessdata->description;
                        if ($allowtake) {
                            $title = get_string('takeattendance','attforblock');
                            $actions = "<a title=\"$title\" href=\"attendances.php?id=$cm->id&amp;sessionid={$sessdata->id}&amp;grouptype={$sessdata->groupid}\">".
                                       "<img src=\"" . $OUTPUT->pix_url('t/go') . "\" alt=\"$title\" /></a>&nbsp;";
                        }
                    }
//				}
                if($allowmanage) {
                    $title = get_string('editsession','attforblock');
                    $actions .= "<a title=\"$title\" href=\"sessions.php?id=$cm->id&amp;sessionid={$sessdata->id}&amp;action=update\">".
                                "<img src=\"" . $OUTPUT->pix_url('t/edit') . "\" alt=\"$title\" /></a>&nbsp;";
                    $title = get_string('deletesession','attforblock');
                    $actions .= "<a title=\"$title\" href=\"sessions.php?id=$cm->id&amp;sessionid={$sessdata->id}&amp;action=delete\">".
                                "<img src=\"" . $OUTPUT->pix_url('t/delete') . "\" alt=\"$title\" /></a>&nbsp;";
                }

                $table->data[$sessdata->id][] = $i;
                $table->data[$sessdata->id][] = $sessdata->groupid ? $groups[$sessdata->groupid]->name : get_string('commonsession', 'attforblock');
                $table->data[$sessdata->id][] = userdate($sessdata->sessdate, get_string('strftimedmyw', 'attforblock'));
                $table->data[$sessdata->id][] = userdate($sessdata->sessdate, get_string('strftimehm', 'attforblock'));
                $hours = floor($sessdata->duration / HOURSECS);
                $mins = floor(($sessdata->duration - $hours * HOURSECS) / MINSECS);
                $mins = $mins < 10 ? "0$mins" : "$mins";
                $table->data[$sessdata->id][] =  ($showendtime=='0') ? ($hours ? "{$hours}&nbsp;{$strhours}&nbsp;{$mins}&nbsp;{$strmins}" : "{$mins}&nbsp;{$strmins}") : userdate($sessdata->sessdate+$sessdata->duration, get_string('strftimehm', 'attforblock'));;
                $table->data[$sessdata->id][] = $desc;
                $table->data[$sessdata->id][] = $actions;
                $table->data[$sessdata->id][] = '<input type="checkbox" name="sessid['.$sessdata->id.']" />';
                unset($desc, $actions);
            }
        }
        
        echo '<div align="center"><div class="generalbox attwidth">';
        echo "<form method=\"post\" action=\"sessions.php?id={$cm->id}\">"; //&amp;sessionid={$sessdata->id}
		print_table($table);//echo $OUTPUT->table($table);
		$hiddensess = $DB->count_records_select('attendance_sessions', "courseid = ? AND attendanceid = ? AND sessdate < ?", array($course->id, $attforblock->id, $course->startdate));
        echo '<table width="100%"><tr><td valign="top">';
        echo '<div align="left">'.helpbutton('hiddensessions', '--', 'attforblock', true, true, '', true); //TODO: Change '--'
        echo get_string('hiddensessions', 'attforblock').': '.$hiddensess.'</div></td>';
        echo '<td><div align="right"><a href="javascript:checkall();">'.get_string('selectall').'</a> /'.
             ' <a href="javascript:checknone();">'.get_string('deselectall').'</a><br /><br />';
        echo '<strong>'.get_string('withselected', 'quiz').':</strong>&nbsp;';
        if ($allowmanage) {
            $actionlist = array('deleteselected' => get_string('delete'),
                                'changeduration' => get_string('changeduration', 'attforblock'));
            choose_from_menu($actionlist, 'action');
            echo '<input type="submit" name="ok" value="'.get_string('ok')."\" />\n";
        } else {
            echo get_string('youcantdo', 'attforblock'); //You can't do anything
        }
        echo '<div align="right">'.helpbutton ('sessions', get_string('help'), 'attforblock', true, true, '', true).'</div>';
        echo '</div></td></tr></table>';
        echo '</form></div></div>';
			
}
?>