<?php  // $Id: view.php,v 1.70.2.23 2008/04/21 14:15:30 skodak Exp $
///////////////////////////////////////////////////////////////////////////
//                                                                       //
// NOTICE OF COPYRIGHT                                                   //
//                                                                       //
// Moodle - Modular Object-Oriented Dynamic Learning Environment         //
//          http://moodle.org                                            //
//                                                                       //
// Copyright (C) 2005 Martin Dougiamas  http://dougiamas.com             //
//                                                                       //
// This program 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 2 of the License, or     //
// (at your option) any later version.                                   //
//                                                                       //
// This program 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:                          //
//                                                                       //
//          http://www.gnu.org/copyleft/gpl.html                         //
//                                                                       //
///////////////////////////////////////////////////////////////////////////

    require_once('../../config.php');
    require_once('lib.php');
    require_once($CFG->libdir.'/blocklib.php');
    require_once("$CFG->libdir/rsslib.php");

    require_once('pagelib.php');

/// One of these is necessary!
    $id    = optional_param('id', 0, PARAM_INT);  // course module id
    $d     = optional_param('d', 0, PARAM_INT);   // database id
    $rid   = optional_param('rid', 0, PARAM_INT);    //record id

    $mode  = optional_param('mode', '', PARAM_ALPHA);    // Force the browse mode  ('single')

    $edit = optional_param('edit', -1, PARAM_BOOL);
    $page = optional_param('page', 0, PARAM_INT);
/// These can be added to perform an action on a record
    $approve = optional_param('approve', 0, PARAM_INT);    //approval recordid
    $delete = optional_param('delete', 0, PARAM_INT);    //delete recordid

    if ($id) {
        if (! $cm = get_coursemodule_from_id('data', $id)) {
            error('Course Module ID was incorrect');
        }
        if (! $course = get_record('course', 'id', $cm->course)) {
            error('Course is misconfigured');
        }
        if (! $data = get_record('data', 'id', $cm->instance)) {
            error('Course module is incorrect');
        }
        $record = NULL;

    } else if ($rid) {
        if (! $record = get_record('data_records', 'id', $rid)) {
            error('Record ID is incorrect');
        }
        if (! $data = get_record('data', 'id', $record->dataid)) {
            error('Data ID is incorrect');
        }
        if (! $course = get_record('course', 'id', $data->course)) {
            error('Course is misconfigured');
        }
        if (! $cm = get_coursemodule_from_instance('data', $data->id, $course->id)) {
            error('Course Module ID was incorrect');
        }
    } else {   // We must have $d
        if (! $data = get_record('data', 'id', $d)) {
            error('Data ID is incorrect');
        }
        if (! $course = get_record('course', 'id', $data->course)) {
            error('Course is misconfigured');
        }
        if (! $cm = get_coursemodule_from_instance('data', $data->id, $course->id)) {
            error('Course Module ID was incorrect');
        }
        $record = NULL;
    }

    require_course_login($course, true, $cm);

    $context = get_context_instance(CONTEXT_MODULE, $cm->id);
    require_capability('mod/data:viewentry', $context);

/// If we have an empty Database then redirect because this page is useless without data
    if (has_capability('mod/data:managetemplates', $context)) {
        if (!record_exists('data_fields','dataid',$data->id)) {      // Brand new database!
            redirect($CFG->wwwroot.'/mod/data/field.php?d='.$data->id);  // Redirect to field entry
        }
    }


/// Check further parameters that set browsing preferences
    if (!isset($SESSION->dataprefs)) {
        $SESSION->dataprefs = array();
    }
    if (!isset($SESSION->dataprefs[$data->id])) {
        $SESSION->dataprefs[$data->id] = array();
        $SESSION->dataprefs[$data->id]['search'] = '';
        $SESSION->dataprefs[$data->id]['search_array'] = array();
        $SESSION->dataprefs[$data->id]['sort'] = $data->defaultsort;
        $SESSION->dataprefs[$data->id]['advanced'] = 0;
        $SESSION->dataprefs[$data->id]['order'] = ($data->defaultsortdir == 0) ? 'ASC' : 'DESC';
    }

    // reset advanced form
    if (!is_null(optional_param('resetadv', null, PARAM_RAW))) {
        $SESSION->dataprefs[$data->id]['search_array'] = array();
        // we need the redirect to cleanup the form state properly
        redirect("view.php?id=$cm->id&amp;mode=$mode&amp;search=&amp;advanced=1");
    }

    $advanced = optional_param('advanced', -1, PARAM_INT);
    if ($advanced == -1) {
        $advanced = $SESSION->dataprefs[$data->id]['advanced'];
    } else {
        if (!$advanced) {
            // explicitly switched to normal mode - discard all advanced search settings
            $SESSION->dataprefs[$data->id]['search_array'] = array();
        }
        $SESSION->dataprefs[$data->id]['advanced'] = $advanced;
    }

    $search_array = $SESSION->dataprefs[$data->id]['search_array'];

    if (!empty($advanced)) {
        $search = '';
        $vals = array();
        $fields = get_records('data_fields', 'dataid', $data->id);
        
        //Added to ammend paging error. This error would occur when attempting to go from one page of advanced
        //search results to another.  All fields were reset in the page transfer, and there was no way of determining
        //whether or not the user reset them.  This would cause a blank search to execute whenever the user attempted
        //to see any page of results past the first.
        //This fix works as follows:
        //$paging flag is set to false when page 0 of the advanced search results is viewed for the first time.
        //Viewing any page of results after page 0 passes the false $paging flag though the URL (see line 523) and the
        //execution falls through to the second condition below, allowing paging to be set to true.
        //Paging remains true and keeps getting passed though the URL until a new search is performed
        //(even if page 0 is revisited).
        //A false $paging flag generates advanced search results based on the fields input by the user. 
        //A true $paging flag generates davanced search results from the $SESSION global.
        //(See lines 147-158)
        
        $paging = optional_param('paging', NULL, PARAM_BOOL);
        if($page == 0 && !isset($paging)) {
            $paging = false;
        }
        else {
            $paging = true;
        }
        if (!empty($fields)) {
            foreach($fields as $field) {
                $searchfield = data_get_field_from_id($field->id, $data);
                //Get field data to build search sql with.  If paging is false, get from user.
                //If paging is true, get data from $search_array which is obtained from the $SESSION (see line 116).
                if(!$paging) {
                    $val = $searchfield->parse_search_field();
                } else {
                    //Set value from session if there is a value @ the required index.
                    if (isset($search_array[$field->id])) {
                        $val = $search_array[$field->id]->data;
                    } else {             //If there is not an entry @ the required index, set value to blank.
                        $val = '';
                    }
                }
                if (!empty($val)) {
                    $search_array[$field->id] = new object();
                    $search_array[$field->id]->sql  = $searchfield->generate_sql('c'.$field->id, $val);
                    $search_array[$field->id]->data = $val;
                    $vals[] = $val;
                } else {
                    // clear it out
                    unset($search_array[$field->id]);
                }
            }
        }

        if (!$paging) {
            // name searching
            $fn = optional_param('u_fn', '', PARAM_NOTAGS);
            $ln = optional_param('u_ln', '', PARAM_NOTAGS);
        } else {
            $fn = isset($search_array[DATA_FIRSTNAME]) ? $search_array[DATA_FIRSTNAME]->data : '';
            $ln = isset($search_array[DATA_LASTNAME]) ? $search_array[DATA_LASTNAME]->data : '';
        }
        if (!empty($fn)) {
            $search_array[DATA_FIRSTNAME] = new object();
            $search_array[DATA_FIRSTNAME]->sql   = '';
            $search_array[DATA_FIRSTNAME]->field = 'u.firstname';
            $search_array[DATA_FIRSTNAME]->data  = $fn;
            $vals[] = $fn;
        } else {
            unset($search_array[DATA_FIRSTNAME]);
        }
        if (!empty($ln)) {
            $search_array[DATA_LASTNAME] = new object();
            $search_array[DATA_LASTNAME]->sql   = '';
            $search_array[DATA_LASTNAME]->field = 'u.lastname';
            $search_array[DATA_LASTNAME]->data  = $ln;
            $vals[] = $ln;
        } else {
            unset($search_array[DATA_LASTNAME]);
        }

        $SESSION->dataprefs[$data->id]['search_array'] = $search_array;     // Make it sticky

        // in case we want to switch to simple search later - there might be multiple values there ;-)
        if ($vals) {
            $val = reset($vals);
            if (is_string($val)) {
                $search = $val;
            }
        }

    } else {
        $search = optional_param('search', $SESSION->dataprefs[$data->id]['search'], PARAM_NOTAGS);
        //Paging variable not used for standard search. Set it to null.
        $paging = NULL;
    }

    $textlib = textlib_get_instance();
    if ($textlib->strlen($search) < 2) {
        $search = '';
    }
    $SESSION->dataprefs[$data->id]['search'] = $search;   // Make it sticky

    $sort = optional_param('sort', $SESSION->dataprefs[$data->id]['sort'], PARAM_INT);
    $SESSION->dataprefs[$data->id]['sort'] = $sort;       // Make it sticky

    $order = (optional_param('order', $SESSION->dataprefs[$data->id]['order'], PARAM_ALPHA) == 'ASC') ? 'ASC': 'DESC';
    $SESSION->dataprefs[$data->id]['order'] = $order;     // Make it sticky


    $oldperpage = get_user_preferences('data_perpage_'.$data->id, 10);
    $perpage = optional_param('perpage', $oldperpage, PARAM_INT);

    if ($perpage < 2) {
        $perpage = 2;
    }
    if ($perpage != $oldperpage) {
        set_user_preference('data_perpage_'.$data->id, $perpage);
    }

    add_to_log($course->id, 'data', 'view', "view.php?id=$cm->id", $data->id, $cm->id);


// Initialize $PAGE, compute blocks
    $PAGE       = page_create_instance($data->id);
    $pageblocks = blocks_setup($PAGE);
    $blocks_preferred_width = bounded_number(180, blocks_preferred_width($pageblocks[BLOCK_POS_LEFT]), 210);

    if (($edit != -1) and $PAGE->user_allowed_editing()) {
        $USER->editing = $edit;
    }

/// RSS and CSS and JS meta
    $meta = '';
    if (!empty($CFG->enablerssfeeds) && !empty($CFG->data_enablerssfeeds) && $data->rssarticles > 0) {
        $rsspath = rss_get_url($course->id, $USER->id, 'data', $data->id);
        $meta .= '<link rel="alternate" type="application/rss+xml" ';
        $meta .= 'title ="'. format_string($course->shortname) .': %fullname%" href="'.$rsspath.'" />';
    }
    if ($data->csstemplate) {
        $meta .= '<link rel="stylesheet" type="text/css" href="'.$CFG->wwwroot.'/mod/data/css.php?d='.$data->id.'" /> ';
    }
    if ($data->jstemplate) {
        $meta .= '<script type="text/javascript" src="'.$CFG->wwwroot.'/mod/data/js.php?d='.$data->id.'"></script>';
    }


/// Print the page header
    $PAGE->print_header($course->shortname.': %fullname%', '', $meta);


/// If we have blocks, then print the left side here
    if (!empty($CFG->showblocksonmodpages)) {
        echo '<table id="layout-table"><tr>';
        if ((blocks_have_content($pageblocks, BLOCK_POS_LEFT) || $PAGE->user_is_editing())) {
            echo '<td style="width: '.$blocks_preferred_width.'px;" id="left-column">';
            print_container_start();
            blocks_print_group($PAGE, $pageblocks, BLOCK_POS_LEFT);
            print_container_end();
            echo '</td>';
        }
        echo '<td id="middle-column">';
        print_container_start();
    }

/// Check to see if groups are being used here
    $returnurl = 'view.php?d='.$data->id.'&amp;search='.s($search).'&amp;sort='.s($sort).'&amp;order='.s($order).'&amp;';
    groups_print_activity_menu($cm, $returnurl);
    $currentgroup = groups_get_activity_group($cm);
    $groupmode = groups_get_activity_groupmode($cm);

    print_heading(format_string($data->name));

    // Do we need to show a link to the RSS feed for the records?
    if (!empty($CFG->enablerssfeeds) && !empty($CFG->data_enablerssfeeds) && $data->rssarticles > 0) {
        echo '<div style="float:right;">';
        rss_print_link($course->id, $USER->id, 'data', $data->id, get_string('rsstype'));
        echo '</div>';
        echo '<div style="clear:both;"></div>';
    }

    if ($data->intro and empty($page) and empty($record) and $mode != 'single') {
        $options = new object();
        $options->noclean = true;
        print_box(format_text($data->intro, FORMAT_MOODLE, $options), 'generalbox', 'intro');
    }

/// Delete any requested records

    if ($delete && confirm_sesskey() && (has_capability('mod/data:manageentries', $context) or data_isowner($delete))) {
        if ($confirm = optional_param('confirm',0,PARAM_INT)) {
            if ($deleterecord = get_record('data_records', 'id', $delete)) {   // Need to check this is valid
                if ($deleterecord->dataid == $data->id) {                       // Must be from this database
                    if ($contents = get_records('data_content','recordid', $deleterecord->id)) {
                        foreach ($contents as $content) {  // Delete files or whatever else this field allows
                            if ($field = data_get_field_from_id($content->fieldid, $data)) { // Might not be there
                                $field->delete_content($content->recordid);
                            }
                        }
                    }
                    delete_records('data_content','recordid', $deleterecord->id);
                    delete_records('data_records','id', $deleterecord->id);

                    add_to_log($course->id, 'data', 'record delete', "view.php?id=$cm->id", $data->id, $cm->id);

                    notify(get_string('recorddeleted','data'), 'notifysuccess');
                }
            }

        } else {   // Print a confirmation page
            if ($deleterecord = get_record('data_records', 'id', $delete)) {   // Need to check this is valid
                if ($deleterecord->dataid == $data->id) {                       // Must be from this database
                    notice_yesno(get_string('confirmdeleterecord','data'),
                            'view.php?d='.$data->id.'&amp;delete='.$delete.'&amp;confirm=1&amp;sesskey='.sesskey(),
                            'view.php?d='.$data->id);

                    $records[] = $deleterecord;
                    echo data_print_template('singletemplate', $records, $data, '', 0, true);

                    print_footer($course);
                    exit;
                }
            }
        }
    }



/// Print the tabs

    if ($record or $mode == 'single') {
        $currenttab = 'single';
    } elseif($mode == 'asearch') {
        $currenttab = 'asearch';
    }
    else {
        $currenttab = 'list';
    }
    include('tabs.php');

    if ($mode == 'asearch') {
        $maxcount = 0;
        
    } else {
    /// Approve any requested records

        $approvecap = has_capability('mod/data:approve', $context); 

        if ($approve && confirm_sesskey() && $approvecap) {
            if ($approverecord = get_record('data_records', 'id', $approve)) {   // Need to check this is valid
                if ($approverecord->dataid == $data->id) {                       // Must be from this database
                    $newrecord->id = $approverecord->id;
                    $newrecord->approved = 1;
                    if (update_record('data_records', $newrecord)) {
                        notify(get_string('recordapproved','data'), 'notifysuccess');
                    }
                }
            }
        }
    
        // Check the number of entries required against the number of entries already made (doesn't apply to teachers)
        $requiredentries_allowed = true;
        $numentries = data_numentries($data);
        if ($data->requiredentries > 0 && $numentries < $data->requiredentries && !has_capability('mod/data:manageentries', $context)) {
            $data->entriesleft = $data->requiredentries - $numentries;
            $strentrieslefttoadd = get_string('entrieslefttoadd', 'data', $data);
            notify($strentrieslefttoadd);
            $requiredentries_allowed = false;
        }

    /// setup group and approve restrictions
        if (!$approvecap && $data->approval) {
            if (isloggedin()) {
                $approveselect = ' AND (r.approved=1 OR r.userid='.$USER->id.') ';
            } else {
                $approveselect = ' AND r.approved=1 ';
            }
        } else {
            $approveselect = ' ';
        }

        if ($currentgroup) {
            $groupselect = " AND (r.groupid = '$currentgroup' OR r.groupid = 0)";
        } else {
            $groupselect = ' ';
        }

        $ilike = sql_ilike(); //Be case-insensitive

    /// Find the field we are sorting on
        if ($sort <= 0 or !$sortfield = data_get_field_from_id($sort, $data)) {

            switch ($sort) {
                case DATA_LASTNAME:
                    $ordering = "u.lastname $order, u.firstname $order";
                    break;
                case DATA_FIRSTNAME:
                    $ordering = "u.firstname $order, u.lastname $order";
                    break;
                case DATA_APPROVED:
                    $ordering = "r.approved $order, r.timecreated $order";
                    break;
                case DATA_TIMEMODIFIED:
                    $ordering = "r.timemodified $order";
                    break;
                case DATA_TIMEADDED:
                default:
                    $sort     = 0;
                    $ordering = "r.timecreated $order";
            }

            $what = ' DISTINCT r.id, r.approved, r.timecreated, r.timemodified, r.userid, u.firstname, u.lastname';
            $count = ' COUNT(DISTINCT c.recordid) ';
            $tables = $CFG->prefix.'data_content c,'.$CFG->prefix.'data_records r,'.$CFG->prefix.'data_content cs, '.$CFG->prefix.'user u ';
            $where =  'WHERE c.recordid = r.id
                         AND r.dataid = '.$data->id.'
                         AND r.userid = u.id
                         AND cs.recordid = r.id ';
            $sortorder = ' ORDER BY '.$ordering.', r.id ASC ';
            $searchselect = '';

            // If requiredentries is not reached, only show current user's entries
            if (!$requiredentries_allowed) {
                $where .= ' AND u.id = ' . $USER->id;
            }

            if (!empty($advanced)) {                                                  //If advanced box is checked.
                foreach($search_array as $key => $val) {                              //what does $search_array hold?
                    if ($key == DATA_FIRSTNAME or $key == DATA_LASTNAME) {
                        $searchselect .= " AND $val->field $ilike '%{$val->data}%'";
                        continue;
                    }
                    $tables .= ', '.$CFG->prefix.'data_content c'.$key.' ';
                    $where .= ' AND c'.$key.'.recordid = r.id';
                    $searchselect .= ' AND ('.$val->sql.') ';
                }
            } else if ($search) {
                $searchselect = " AND (cs.content $ilike '%$search%' OR u.firstname $ilike '%$search%' OR u.lastname $ilike '%$search%' ) ";
            } else {
                $searchselect = ' ';
            }

        } else {

            $sortcontent = $sortfield->get_sort_field();
            $sortcontentfull = $sortfield->get_sort_sql('c.'.$sortcontent);

            $what = ' DISTINCT r.id, r.approved, r.timecreated, r.timemodified, r.userid, u.firstname, u.lastname, c.'.$sortcontent.', '.$sortcontentfull.' AS _order ';
            $count = ' COUNT(DISTINCT c.recordid) ';
            $tables = $CFG->prefix.'data_content c,'.$CFG->prefix.'data_records r,'.$CFG->prefix.'data_content cs, '.$CFG->prefix.'user u ';
            $where =  'WHERE c.recordid = r.id
                         AND c.fieldid = '.$sort.'
                         AND r.dataid = '.$data->id.'
                         AND r.userid = u.id
                         AND cs.recordid = r.id ';
            $sortorder = ' ORDER BY _order '.$order.' , r.id ASC ';
            $searchselect = '';

            // If requiredentries is not reached, only show current user's entries
            if (!$requiredentries_allowed) {
                $where .= ' AND u.id = ' . $USER->id;
            }

            if (!empty($advanced)) {                                                  //If advanced box is checked.
                foreach($search_array as $key => $val) {                              //what does $search_array hold?
                    if ($key == DATA_FIRSTNAME or $key == DATA_LASTNAME) {
                        $searchselect .= " AND $val->field $ilike '%{$val->data}%'";
                        continue;
                    }
                    $tables .= ', '.$CFG->prefix.'data_content c'.$key.' ';
                    $where .= ' AND c'.$key.'.recordid = r.id';
                    $searchselect .= ' AND ('.$val->sql.') ';
                }
            } else if ($search) {
                $searchselect = " AND (cs.content $ilike '%$search%' OR u.firstname $ilike '%$search%' OR u.lastname $ilike '%$search%' ) ";
            } else {
                $searchselect = ' ';
            }
        }

    /// To actually fetch the records

        $fromsql    = "FROM $tables $where $groupselect $approveselect $searchselect";
        $sqlselect  = "SELECT $what $fromsql $sortorder";
        $sqlcount   = "SELECT $count $fromsql";   // Total number of records when searching
        $sqlrids    = "SELECT tmp.id FROM ($sqlselect) tmp";
        $sqlmax     = "SELECT $count FROM $tables $where $groupselect $approveselect"; // number of all recoirds user may see

    /// Work out the paging numbers and counts

        $totalcount = count_records_sql($sqlcount);
        if (empty($searchselect)) {
            $maxcount = $totalcount;
        } else {
            $maxcount = count_records_sql($sqlmax);
        }

        if ($record) {     // We need to just show one, so where is it in context?
            $nowperpage = 1;
            $mode = 'single';

            $page = 0;
            if ($allrecordids = get_records_sql($sqlrids)) {
                $allrecordids = array_keys($allrecordids);
                $page = (int)array_search($record->id, $allrecordids);
                unset($allrecordids);
            }

        } else if ($mode == 'single') {  // We rely on ambient $page settings
            $nowperpage = 1;

        } else {
            $nowperpage = $perpage;
        }

    /// Get the actual records
        
        if (!$records = get_records_sql($sqlselect, $page * $nowperpage, $nowperpage)) {
            // Nothing to show!
            if ($record) {         // Something was requested so try to show that at least (bug 5132)
                if (has_capability('mod/data:manageentries', $context) || empty($data->approval) ||
                         $record->approved || (isloggedin() && $record->userid == $USER->id)) {
                    if (!$currentgroup || $record->groupid == $currentgroup || $record->groupid == 0) {
                        // OK, we can show this one
                        $records = array($record->id => $record);
                        $totalcount = 1;
                    }
                }
            }
        }

        if (empty($records)) {
            if ($maxcount){
                $a = new object();
                $a->max = $maxcount;
                $a->reseturl = "view.php?id=$cm->id&amp;mode=$mode&amp;search=&amp;advanced=0";
                notify(get_string('foundnorecords','data', $a));
            } else {
                notify(get_string('norecords','data'));
            }

        } else { //  We have some records to print

            if ($maxcount != $totalcount) {
                $a = new object();
                $a->num = $totalcount;
                $a->max = $maxcount;
                $a->reseturl = "view.php?id=$cm->id&amp;mode=$mode&amp;search=&amp;advanced=0";
                notify(get_string('foundrecords', 'data', $a), 'notifysuccess'); 
            }

            if ($mode == 'single') {                  // Single template
                $baseurl = 'view.php?d='.$data->id.'&amp;mode=single&amp;';

                print_paging_bar($totalcount, $page, $nowperpage, $baseurl, $pagevar='page');

                if (empty($data->singletemplate)){
                    notify(get_string('nosingletemplate','data'));
                    data_generate_default_template($data, 'singletemplate', 0, false, false);
                }

                data_print_template('singletemplate', $records, $data, $search, $page);

                print_paging_bar($totalcount, $page, $nowperpage, $baseurl, $pagevar='page');

            } else {                                  // List template
                $baseurl = 'view.php?d='.$data->id.'&amp;';
                //send the advanced flag through the URL so it is remembered while paging.
                $baseurl .= 'advanced='.$advanced.'&amp;';
                //pass variable to allow determining whether or not we are paging through results.
                $baseurl .= 'paging='.$paging.'&amp;';

                print_paging_bar($totalcount, $page, $nowperpage, $baseurl, $pagevar='page');

                if (empty($data->listtemplate)){
                    notify(get_string('nolisttemplate','data'));
                    data_generate_default_template($data, 'listtemplate', 0, false, false);
                }
                echo $data->listtemplateheader;
                data_print_template('listtemplate', $records, $data, $search, $page);
                echo $data->listtemplatefooter;

                print_paging_bar($totalcount, $page, $nowperpage, $baseurl, $pagevar='page');
            }

        }
    }
    
    $search = trim($search);
    if (empty($records)) {
        $records = array();
    }

    //Advanced search form doesn't make sense for single (redirects list view)
    if (($maxcount || $mode == 'asearch') && $mode != 'single') {
        data_print_preference_form($data, $perpage, $search, $sort, $order, $search_array, $advanced, $mode);
    }

/// If we have blocks, then print the left side here
    if (!empty($CFG->showblocksonmodpages)) {
        print_container_end();
        echo '</td>';   // Middle column
        if ((blocks_have_content($pageblocks, BLOCK_POS_RIGHT) || $PAGE->user_is_editing())) {
            echo '<td style="width: '.$blocks_preferred_width.'px;" id="right-column">';
            print_container_start();
            blocks_print_group($PAGE, $pageblocks, BLOCK_POS_RIGHT);
            print_container_end();
            echo '</td>';
        }
        echo '</tr></table>';
    }

    print_footer($course);
?>
