# The LearningOnline Network with CAPA
# Routines to control the menu
#
# $Id: lonmenu.pm,v 1.366 2011/12/28 22:41:02 raeburn Exp $
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA 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.
#
# LON-CAPA 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.
#
# You should have received a copy of the GNU General Public License
# along with LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
# /home/httpd/html/adm/gpl.txt
#
# http://www.lon-capa.org/
#
#
# There is one parameter controlling the action of this module:
#

=head1 NAME

Apache::lonmenu

=head1 SYNOPSIS

Coordinates the response to clicking an image.

This is part of the LearningOnline Network with CAPA project
described at http://www.lon-capa.org.

=head1 GLOBAL VARIABLES

=over

=item @desklines

Each element of this array contains a line of mydesk.tab that doesn't start with
cat, prim or scnd. 
It gets filled in the BEGIN block of this module.

=item %category_names

The keys of this hash are the abbreviations used in mydesk.tab in those lines that 
start with cat, the values are strings representing titles. 
It gets filled in the BEGIN block of this module.

=item %category_members

TODO 

=item %category_positions

The keys of this hash are the abbreviations used in mydesk.tab in those lines that
start with cat, its values are position vectors (column, row). 
It gets filled in the BEGIN block of this module.

=item $readdesk

Indicates that mydesk.tab has been read. 
It is set to 'done' in the BEGIN block of this module.

=item @primary_menu

The elements of this array reference arrays that are made up of the components
of those lines of mydesk.tab that start with prim.
It is used by primary_menu() to generate the corresponding menu.
It gets filled in the BEGIN block of this module.

=item @secondary_menu

The elements of this array reference arrays that are made up of the components
of those lines of mydesk.tab that start with scnd.
It is used by secondary_menu() to generate the corresponding menu.
It gets filled in the BEGIN block of this module.

=back

=head1 SUBROUTINES

=over

=item prep_menuitems(\@menuitem)

This routine wraps a menuitem in proper HTML. It is used by primary_menu() and 
secondary_menu().

=item primary_menu()

This routine evaluates @primary_menu and returns XHTML for the menu
that contains following links: About, Message, Roles, Help, Logout
@primary_menu is filled within the BEGIN block of this module with 
entries from mydesk.tab 

=item secondary_menu()

Same as primary_menu() but operates on @secondary_menu.

=item innerregister()

This gets called in order to register a URL in the body of the document

=item clear()

=item switch()

Switch a button or create a link
Switch acts on the javascript that is executed when a button is clicked.  
The javascript is usually similar to "go('/adm/roles')" or "cstrgo(..)".

=item secondlevel()

=item openmenu()

=item inlinemenu()

=item rawconfig()

=item utilityfunctions()

=item serverform()

=item constspaceform()

=item get_nav_status()

=item hidden_button_check()

=item roles_selector()

=item jump_to_role()

=back

=cut

package Apache::lonmenu;

use strict;
use Apache::lonnet;
use Apache::lonhtmlcommon();
use Apache::loncommon();
use Apache::lonenc();
use Apache::lonlocal;
use Apache::lonmsg();
use LONCAPA qw(:DEFAULT :match);
use HTML::Entities();
use Apache::lonwishlist();

use vars qw(@desklines %category_names %category_members %category_positions 
            $readdesk @primary_menu @secondary_menu);

my @inlineremote;

sub prep_menuitem {
    my ($menuitem) = @_;
    return '' unless(ref($menuitem) eq 'ARRAY');
    my $link;
    if ($$menuitem[1]) { # graphical Link
        $link = "<img class=\"LC_noBorder\""
              . " src=\"" . &Apache::loncommon::lonhttpdurl($$menuitem[1]) . "\"" 
              . " alt=\"" . &mt($$menuitem[2]) . "\" />";
    } else {             # textual Link
        $link = &mt($$menuitem[3]);
    }
    return '<li><a' 
           # highlighting for new messages
           . ( $$menuitem[4] eq 'newmsg' ? ' class="LC_new_message"' : '') 
           . qq| href="$$menuitem[0]" target="_top">$link</a></li>|;
}

# primary_menu() evaluates @primary_menu and returns XHTML for the menu
# that contains following links:
# About, Message, Roles, Help, Logout
# @primary_menu is filled within the BEGIN block of this module with 
# entries from mydesk.tab
sub primary_menu {
    my $menu;
    # each element of @primary contains following array:
    # (link url, icon path, alt text, link text, condition)
    my $public;
    if ((($env{'user.name'} eq 'public') && ($env{'user.domain'} eq 'public'))
        || (($env{'user.name'} eq '') && ($env{'user.domain'} eq ''))) {
        $public = 1;
    }
    foreach my $menuitem (@primary_menu) {
        # evaluate conditions 
        next if    ref($menuitem)       ne 'ARRAY';    #
        next if    $$menuitem[4]        eq 'nonewmsg'  # show links depending on
                && &Apache::lonmsg::mynewmail();       # whether a new msg 
        next if    $$menuitem[4]        eq 'newmsg'    # arrived or not
                && !&Apache::lonmsg::mynewmail();      # 
        next if    $$menuitem[4]        !~ /public/    ##we've a public user,
                && $public;                            ##who should not see all
                                                       ##links
        next if    $$menuitem[4]        eq 'onlypublic'# hide links which are 
                && !$public;                           # only visible to public
                                                       # users
        next if    $$menuitem[4]        eq 'roles'     ##show links depending on
                && &Apache::loncommon::show_course();  ##term 'Courses' or 
        next if    $$menuitem[4]        eq 'courses'   ##'Roles' wanted
                && !&Apache::loncommon::show_course(); ##
        
            
        if ($$menuitem[3] eq 'Help') { # special treatment for helplink
            if ($public) {
                my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
                my $defdom = &Apache::lonnet::default_login_domain();
                my $to = &Apache::loncommon::build_recipient_list(undef,
                                                                  'helpdeskmail',
                                                                  $defdom,$origmail);
                if ($to ne '') {
                    $menu .= &prep_menuitem($menuitem); 
                }
            } else {
                $menu .= '<li>'.&Apache::loncommon::top_nav_help('Help').'</li>';
            }
        } else {
            $menu .= prep_menuitem($menuitem);
        }
    }
    $menu =~ s/\[domain\]/$env{'user.domain'}/g;
    $menu =~ s/\[user\]/$env{'user.name'}/g;

    return "<ol class=\"LC_primary_menu LC_right\">$menu</ol>";
}

#returns hashref {user=>'',dom=>''} containing:
#   own name, domain if user is au
#   name, domain of parent author if user is ca or aa
#empty return if user is not an author or not on homeserver
#
#TODO this should probably be moved somewhere more central
#since it can be used by different parts of the system
sub getauthor{
    return unless $env{'request.role'}=~/^(ca|aa|au)/; #nothing to do if user isn't some kind of author

                        #co- or assistent author?
    my ($dom, $user) = ($env{'request.role'} =~ /^(?:ca|aa)\.\/($match_domain)\/($match_username)$/)
                       ? ($1, $2) #domain, username of the parent author
                       : @env{ ('request.role.domain', 'user.name') }; #own domain, username

    # current server == home server?
    my $home =  &Apache::lonnet::homeserver($user,$dom);
    foreach (&Apache::lonnet::current_machine_ids()){
        return {user => $user, dom => $dom} if $_ eq $home;
    }

    # if wrong server
    return;
}

sub secondary_menu {
    my $menu;

    my $crstype = &Apache::loncommon::course_type();
    my $crs_sec = $env{'request.course.id'} . ($env{'request.course.sec'} 
                                               ? "/$env{'request.course.sec'}"
                                               : '');
    my $canedit       = &Apache::lonnet::allowed('mdc', $env{'request.course.id'});
    my $canviewgrps   = &Apache::lonnet::allowed('vcg', $crs_sec); 
    my $canmodifyuser = &Apache::lonnet::allowed('cst', $crs_sec); 
    my $canviewwnew   = &Apache::lonnet::allowed('whn', $crs_sec); 
    my $canmodpara    = &Apache::lonnet::allowed('opa', $crs_sec);
    my $canvgr        = &Apache::lonnet::allowed('vgr', $crs_sec);
    my $canmgr        = &Apache::lonnet::allowed('mgr', $crs_sec); 
    my $author        = &getauthor();

    my %groups = &Apache::lonnet::get_active_groups(
                     $env{'user.domain'}, $env{'user.name'},
                     $env{'course.' . $env{'request.course.id'} . '.domain'},
                     $env{'course.' . $env{'request.course.id'} . '.num'});

    foreach my $menuitem (@secondary_menu) {
        # evaluate conditions 
        next if    ref($menuitem)  ne 'ARRAY';
        next if    $$menuitem[4]   ne 'always'
                && $$menuitem[4]   ne 'author'
                && !$env{'request.course.id'};
        next if    $$menuitem[4]   =~ /^mdc/
                && !$canedit;
        next if    $$menuitem[4]  eq 'nvgr'
                && $canvgr;
        next if    $$menuitem[4]  eq 'vgr'
                && !$canvgr;
        next if    $$menuitem[4]   eq 'cst'
                && !$canmodifyuser;
        next if    $$menuitem[4]   eq 'ncst'
                && $canmodifyuser;
        next if    $$menuitem[4]   eq 'mgr'
                && !$canmgr;
        next if    $$menuitem[4]   eq 'nmgr'
                && $canmgr;
        next if    $$menuitem[4]   eq 'whn'
                && !$canviewwnew;
        next if    $$menuitem[4]   eq 'opa'
                && !$canmodpara;
        next if    $$menuitem[4]   =~ /showgroups$/
                && !$canviewgrps
                && !%groups;
        next if    $$menuitem[4]    eq 'author'
                && !$author;

        if ($$menuitem[3] eq 'Roles' && $env{'request.course.id'}) {
            # special treatment for role selector
            my $roles_selector = &roles_selector(
                        $env{'course.' . $env{'request.course.id'} . '.domain'},
                        $env{'course.' . $env{'request.course.id'} . '.num'}  );

            $menu .= $roles_selector ? "<li>$roles_selector</li>"
                                     : '';
        } else {
            $menu .= &prep_menuitem(\@$menuitem);
        }
    }
    if ($menu =~ /\[url\].*\[symb\]/) {
        my $escurl  = &escape( &Apache::lonenc::check_encrypt(
                             $env{'request.noversionuri'}));

        my $escsymb = &escape( &Apache::lonenc::check_encrypt(
                             $env{'request.symb'})); 

        if (    $env{'request.state'} eq 'construct'
            and (   $env{'request.noversionuri'} eq '' 
                 || !defined($env{'request.noversionuri'}))) 
        {
            my $londocroot = $Apache::lonnet::perlvar{'lonDocRoot'};
            ($escurl = $env{'request.filename'}) =~ s{^\Q$londocroot\E}{};
            $escurl  = &escape($escurl);
        }    
        $menu =~ s/\[url\]/$escurl/g;
        $menu =~ s/\[symb\]/$escsymb/g;
    }
    $menu =~ s/\[uname\]/$$author{user}/g;
    $menu =~ s/\[udom\]/$$author{dom}/g;

    return "<ul id=\"LC_secondary_menu\">$menu</ul>";
}

sub innerregister {
    my ($forcereg,$bread_crumbs) = @_;
    my $const_space = ($env{'request.state'} eq 'construct');
    my $is_const_dir = 0;

    if ($env{'request.noversionuri'} =~ m{^/res/adm/pages/}) { return ''; }

    $env{'request.registered'} = 1;

    undef(@inlineremote);

    my $resurl; 
    if ( $env{'request.symb'} && $env{'request.course.id'} ) {

        (my $mapurl, my $rid, $resurl) = &Apache::lonnet::decode_symb(&Apache::lonnet::symbread());
        my $coursetitle = $env{'course.'.$env{'request.course.id'}.'.description'};

        my $maptitle = &Apache::lonnet::gettitle($mapurl);
        my $restitle = &Apache::lonnet::gettitle(&Apache::lonnet::symbread());

#SD
#course_type only Course and Community?
#
        my @crumbs;
        unless (($forcereg) && ($env{'request.noversionuri'} eq '/adm/navmaps')
                && ($mapurl eq $env{'course.'.$env{'request.course.id'}.'.url'})) {
            @crumbs = ({text  => Apache::loncommon::course_type() 
                                . ' Contents', 
                        href  => "Javascript:gopost('/adm/navmaps','')"});
        }
        if ($mapurl ne $env{'course.'.$env{'request.course.id'}.'.url'}) { 
            push(@crumbs, {text  => '...',
                           no_mt => 1});
        }

        push @crumbs, {text => $maptitle, no_mt => 1} if ($maptitle 
                                                   && $maptitle ne 'default.sequence' 
                                                   && $maptitle ne $coursetitle);

        push @crumbs, {text => $restitle, no_mt => 1} if $restitle; 

        &Apache::lonhtmlcommon::clear_breadcrumbs();
        &Apache::lonhtmlcommon::add_breadcrumb(@crumbs);
    }elsif (! $const_space){
        #a situation when we're looking at a resource outside of context of a 
        #course or construction space (e.g. with cumulative rights)
        &Apache::lonhtmlcommon::clear_breadcrumbs();
        &Apache::lonhtmlcommon::add_breadcrumb({text => 'View Resource'});
    }
# =============================================================================
# ============================ This is for URLs that actually can be registered
    return '' unless ( ($env{'request.noversionuri'}!~m{^/(res/)*adm/}) 
                       || $forcereg );

# -- This applies to homework problems for users with grading privileges
	my $crs='/'.$env{'request.course.id'};
	if ($env{'request.course.sec'}) {
	    $crs.='_'.$env{'request.course.sec'};
	}
	$crs=~s/\_/\//g;

        my $hwkadd='';
        if ($env{'request.symb'} ne '' &&
	    $env{'request.filename'}=~/$LONCAPA::assess_re/) {
	    if (&Apache::lonnet::allowed('mgr',$crs)) {
		$hwkadd.=&switch('','',7,2,'pgrd.png','Content Grades','grades[_4]',
                       "gocmd('/adm/grades','gradingmenu')",
                       'Content Grades');
            } elsif (&Apache::lonnet::allowed('vgr',$crs)) {
		$hwkadd.=&switch('','',7,2,'subm.png','Content Submissions','missions[_1]',
                       "gocmd('/adm/grades','submission')",
		       'Content Submissions');
            }
	}
	if ($env{'request.symb'} ne '' &&
	    &Apache::lonnet::allowed('opa',$crs)) {
	    $hwkadd.=&switch('','',7,3,'pparm.png','Content Settings','parms[_2]',
			     "gocmd('/adm/parmset','set')",
			     'Content Settings');
	}
        if ($env{'request.symb'}=~/^uploaded/ &&
            &Apache::lonnet::allowed('mdc',$crs)) {
            $hwkadd.=&switch('','',7,4,'docs.png','Folder/Page Content','parms[_2]',
                             "gocmd('/adm/coursedocs','direct')",
                             'Folder/Page Content');
        }
# -- End Homework
        ###
        ### Determine whether or not to display the 'cstr' button for this
        ### resource
        ###
        my $editbutton = '';
        my $noeditbutton = 1;
        my ($cnum,$cdom);
        if ($env{'request.course.id'}) {
            $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
            $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
        }
        if ($env{'user.author'}) {
            if ($env{'request.role'}=~/^(aa|ca|au)/) {
#
# We have the role of an author
#
                # Set defaults for authors
                my ($top,$bottom) = ('con-','struct');
                my $action = "go('/priv/".$env{'user.domain'}.'/'.$env{'user.name'}."');";
                my $cadom  = $env{'request.role.domain'};
                my $caname = $env{'user.name'};
                my $desc = "Enter my construction space";
                # Set defaults for co-authors
                if ($env{'request.role'} =~ /^ca/) { 
                    ($cadom,$caname)=($env{'request.role'}=~/($match_domain)\/($match_username)$/);
                    ($top,$bottom) = ('co con-','struct');
                    $action = "go('/priv/".$cadom.'/'.$caname."');";
                    $desc = "Enter construction space as co-author";
                } elsif ($env{'request.role'} =~ /^aa/) {
                    ($cadom,$caname)=($env{'request.role'}=~/($match_domain)\/($match_username)$/);
                    ($top,$bottom) = ('co con-','struct');
                    $action = "go('/priv/".$cadom.'/'.$caname."');";
                    $desc = "Enter construction space as assistant co-author";
                }
                # Check that we are on the correct machine
                my $home = &Apache::lonnet::homeserver($caname,$cadom);
		my $allowed=0;
		my @ids=&Apache::lonnet::current_machine_ids();
		foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
		if (!$allowed) {
		    $editbutton=&switch('','',6,1,$top,,$bottom,$action,$desc);
                    $noeditbutton = 0;
                }
            }
#
# We are an author for some stuff, but currently do not have the role of author.
# Figure out if we have authoring privileges for the resource we are looking at.
# This should maybe become a privilege check in lonnet
#
            ##
            ## Determine if user can edit url.
            ##
            my $cfile='';
            my $cfuname='';
            my $cfudom='';
            my $uploaded;
            my $switchserver='';
            my $home;
            if ($env{'request.filename'}) {
                my $file=&Apache::lonnet::declutter($env{'request.filename'});
                if (defined($cnum) && defined($cdom)) {
                    $uploaded = &is_course_upload($file,$cnum,$cdom);
                }
                if (!$uploaded) {

                    $file=~s{^(priv/$match_domain/$match_username)}{/$1};
                    $file=~s{^($match_domain/$match_username)}{/priv/$1};

                    # Check that the user has permission to edit this resource
                    my $setpriv = 1;
                    ($cfuname,$cfudom)=&Apache::loncacc::constructaccess($file,$setpriv);
                    if (defined($cfudom)) {
		        $home=&Apache::lonnet::homeserver($cfuname,$cfudom);
		        my $allowed=0;
		        my @ids=&Apache::lonnet::current_machine_ids();
		        foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
		        if ($allowed) {
                            $cfile=$file;
                        } else {
                            $switchserver=$file;
                        }
                    }
                }
            }
            # Finally, turn the button on or off
            if (($cfile || $switchserver) && !$const_space) {
                my $nocrsedit;
                # Suppress display where CC has switched to student role.
                if ($env{'request.course.id'}) {
                    unless(&Apache::lonnet::allowed('mdc',
                                                    $env{'request.course.id'})) {
                        $nocrsedit = 1;
                    }
                }
                if ($nocrsedit) {
                    $editbutton=&clear(6,1);
                } else {
                    my $bot = "go('$cfile')";
                    if ($switchserver) {
                        if ( $env{'request.symb'} && $env{'request.course.id'} ) {
                            $cfile = '/adm/switchserver?otherserver='.$home.'&amp;role='.
                                     &HTML::Entities::encode($env{'request.role'},'"<>&').'&amp;symb='.
                                     &HTML::Entities::encode($env{'request.symb'},'"<>&');
                            $bot = "need_switchserver('$cfile');";
                        }
                    }
                    $editbutton=&switch
                       ('','',6,1,'pcstr.png','Edit','resource[_2]',
                        $bot,"Edit this resource");
                    $noeditbutton = 0;
                }
            } elsif ($editbutton eq '') {
                $editbutton=&clear(6,1);
            }
        }
        if (($noeditbutton) && ($env{'request.filename'})) { 
            if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
                my $file=&Apache::lonnet::declutter($env{'request.filename'});
                if (defined($cnum) && defined($cdom)) {
                    if (&is_course_upload($file,$cnum,$cdom)) {
                        my $cfile = &edit_course_upload($file,$cnum,$cdom);
                        if ($cfile) {
                            $editbutton=&switch
                                        ('','',6,1,'pcstr.png','Edit',
                                         'resource[_2]',"go('".$cfile."');",
                                         'Edit this resource');
                        }
                    }
                }
            }
        }
        if ($env{'request.course.id'}) {
            if ($resurl eq "public/$cdom/$cnum/syllabus") {
                if ($env{'course.'.$env{'request.course.id'}.'.externalsyllabus'} =~ /\w/) {
                    if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
                        $editbutton=&switch('','',6,1,'pcstr.png','Edit',
                                            'resource[_2]',
                                            "go('/adm/courseprefs?phase=display&actions=courseinfo')",
                                            'Edit this resource');
                    }
                }
            }
        }
        ###
        ###
# Prepare the rest of the buttons
        my $menuitems;
        if ($const_space) {
#
# We are in construction space
#

            my $londocroot = $Apache::lonnet::perlvar{'lonDocRoot'};
	    my ($udom,$uname,$thisdisfn) =
		($env{'request.filename'}=~m{^\Q$londocroot/priv/\E([^/]+)/([^/]+)/(.*)$});
            my $currdir = '/priv/'.$udom.'/'.$uname.'/'.$thisdisfn;
            if ($currdir =~ m-/$-) {
                $is_const_dir = 1;
            } else {
                $currdir =~ s|[^/]+$||;
		my $cleandisfn = &Apache::loncommon::escape_single($thisdisfn);
		my $esc_currdir = &Apache::loncommon::escape_single($currdir);
#
# Probably should be in mydesk.tab
#
                $menuitems=(<<ENDMENUITEMS);
s&6&1&list.png&Directory&dir[_1]&golist('$esc_currdir')&List current directory
s&6&2&rtrv.png&Retrieve&version[_1]&gocstr('/adm/retrieve','/priv/$udom/$uname/$cleandisfn')&Retrieve old version
s&6&3&pub.png&Publish&resource[_3]&gocstr('/adm/publish','/priv/$udom/$uname/$cleandisfn')&Publish this resource
s&7&1&del.png&Delete&resource[_2]&gocstr('/adm/cfile?action=delete','/priv/$udom/$uname/$cleandisfn')&Delete this resource
s&7&2&prt.png&Print&printout[_1]&gocstr('/adm/printout','/priv/$udom/$uname/$cleandisfn')&Prepare a printable document
ENDMENUITEMS
            }
                if (ref($bread_crumbs) eq 'ARRAY') {
                    &Apache::lonhtmlcommon::clear_breadcrumbs();
                    foreach my $crumb (@{$bread_crumbs}){
                        &Apache::lonhtmlcommon::add_breadcrumb($crumb);
                    }
                }
        } elsif ( defined($env{'request.course.id'}) && 
		 $env{'request.symb'} ne '' ) {
#
# We are in a course and looking at a registred URL
# Should probably be in mydesk.tab
#
	    $menuitems=(<<ENDMENUITEMS);
c&3&1
s&2&1&back.png&&&gopost('/adm/flip','back:'+currentURL)&Previous content resource&&1
s&2&3&forw.png&&&gopost('/adm/flip','forward:'+currentURL)&Next content resource&&3
c&6&3
c&8&1
c&8&2
s&8&3&prt.png&Print&printout[_1]&gopost('/adm/printout',currentURL)&Prepare a printable document
ENDMENUITEMS
            if (&Apache::lonnet::allowed('bre', $env{'request.course.id'}) eq 'F' && $env{'request.uri'} =~ /^\/res/) {
                # wishlist is only available for users with access to resource-pool
                # and links can only be set for resources within the resource-pool
                $menuitems .= (<<ENDMENUITEMS);
s&9&1&wishlist-link.png&Wishlist&wishlistlink[_2]&set_wishlistlink()&Set a link for this resource to wishlist&&1
ENDMENUITEMS
            }

my $currentURL = &Apache::loncommon::get_symb();
my ($symb_old,$symb_old_enc) = &Apache::loncommon::clean_symb($currentURL);
my $annotation = &Apache::loncommon::get_annotation($symb_old,$symb_old_enc);
$menuitems.="s&9&3&";
if(length($annotation) > 0){
	$menuitems.="anot2.png";
}else{
	$menuitems.="anot.png";
}
$menuitems.="&Notes&&annotate()&";
$menuitems.="Make notes and annotations about this resource&&1\n";

            unless ($env{'request.noversionuri'}=~/\/(bulletinboard|smppg|navmaps|syllabus|aboutme|viewclasslist|portfolio)(\?|$)/) {
		if ((!$env{'request.enc'}) && ($env{'request.noversionuri'} !~ m{^/adm/wrapper/ext/})) {
		    $menuitems.=(<<ENDREALRES);
s&6&3&catalog.png&Info&info[_1]&catalog_info()&Show Metadata
ENDREALRES
                }
	        $menuitems.=(<<ENDREALRES);
s&8&1&eval.png&Evaluate&this[_1]&gopost('/adm/evaluate',currentURL,1)&Provide my evaluation of this resource
s&8&2&fdbk.png&Communicate&discuss[_1]&gopost('/adm/feedback',currentURL,1)&Provide feedback messages or contribute to the course discussion about this resource
ENDREALRES
	    }
        }
	if ($env{'request.uri'} =~ /^\/res/) {
	    $menuitems .= (<<ENDMENUITEMS);
s&8&3&prt.png&Print&printout[_1]&gopost('/adm/printout',currentURL)&Prepare a printable document
ENDMENUITEMS
            if (&Apache::lonnet::allowed('bre', $env{'request.course.id'}) eq 'F') {
                # wishlist is only available for users with access to resource-pool
                $menuitems .= (<<ENDMENUITEMS);
s&9&1&wishlist-link.png&Wishlist&wishlistlink[_2]&set_wishlistlink()&Set a link for this resource to wishlist&&1
ENDMENUITEMS
            }
	}
        my $buttons='';
        foreach (split(/\n/,$menuitems)) {
	    my ($command,@rest)=split(/\&/,$_);
            my $idx=10*$rest[0]+$rest[1];
            if (&hidden_button_check() eq 'yes') {
                if ($idx == 21 ||$idx == 23) {
                    $buttons.=&switch('','',@rest);
                } else {
                    $buttons.=&clear(@rest);
                }
            } else {  
                if ($command eq 's') {
	            $buttons.=&switch('','',@rest);
                } else {
                    $buttons.=&clear(@rest);
                }
            }
        }

	    my $addremote=0;
	    foreach (@inlineremote) { if ($_ ne '') { $addremote=1; last;} }
    if ($addremote) {

        &Apache::lonhtmlcommon::clear_breadcrumb_tools();

            &Apache::lonhtmlcommon::add_breadcrumb_tool(
                'navigation', @inlineremote[21,23]);

        if(hidden_button_check() ne 'yes') {
            &Apache::lonhtmlcommon::add_breadcrumb_tool(
                'tools', @inlineremote[93,91,81,82,83]);

            #publish button in construction space
            if ($env{'request.state'} eq 'construct'){
                &Apache::lonhtmlcommon::add_breadcrumb_tool(
                     'advtools', $inlineremote[63]);
            } else {
                &Apache::lonhtmlcommon::add_breadcrumb_tool(
                     'tools', $inlineremote[63]);
            }
            
            unless ($env{'request.noversionuri'}=~ m{^/adm/(navmaps|viewclasslist)(\?|$)}) {
                &Apache::lonhtmlcommon::add_breadcrumb_tool(
                    'advtools', @inlineremote[61,71,72,73,74,92]);
            }
        }
    }

    return   &Apache::lonhtmlcommon::scripttag('', 'start')
           . &Apache::lonhtmlcommon::breadcrumbs(undef,undef,0)
           . &Apache::lonhtmlcommon::scripttag('', 'end');
}

sub is_course_upload {
    my ($file,$cnum,$cdom) = @_;
    my $uploadpath = &LONCAPA::propath($cdom,$cnum);
    $uploadpath =~ s{^\/}{};
    if (($file =~ m{^\Q$uploadpath\E/userfiles/docs/}) ||
        ($file =~ m{^userfiles/\Q$cdom\E/\Q$cnum\E/docs/})) {
        return 1;
    }
    return;
}

sub edit_course_upload {
    my ($file,$cnum,$cdom) = @_;
    my $cfile;
    if ($file =~/\.(htm|html|css|js|txt)$/) {
        my $ext = $1;
        my $url = &Apache::lonnet::hreflocation('',$file);
        my $home = &Apache::lonnet::homeserver($cnum,$cdom);
        my @ids=&Apache::lonnet::current_machine_ids();
        my $dest;
        if ($home && grep(/^\Q$home\E$/,@ids)) {
            $dest = $url.'?forceedit=1';
        } else {
            unless (&Apache::lonnet::get_locks()) {
                $dest = '/adm/switchserver?otherserver='.
                        $home.'&role='.$env{'request.role'}.
                        '&url='.$url.'&forceedit=1';
            }
        }
        if ($dest) {
            $cfile = &HTML::Entities::encode($dest,'"<>&');
        }
    }
    return $cfile;
}

# ================================================================== Raw Config

sub clear {
    my ($row,$col)=@_;
    $inlineremote[10*$row+$col]='';
    return ''; 
}

# ============================================ Switch a button or create a link
# Switch acts on the javascript that is executed when a button is clicked.  
# The javascript is usually similar to "go('/adm/roles')" or "cstrgo(..)".

sub switch {
    my ($uname,$udom,$row,$col,$img,$top,$bot,$act,$desc,$cat,$nobreak)=@_;
    $act=~s/\$uname/$uname/g;
    $act=~s/\$udom/$udom/g;
    $top=&mt($top);
    $bot=&mt($bot);
    $desc=&mt($desc);
    my $idx=10*$row+$col;
    $category_members{$cat}.=':'.$idx;

# Inline Menu
    if ($nobreak==2) { return ''; }
    my $text=$top.' '.$bot;
    $text=~s/\s*\-\s*//gs;

    my $pic=
	   '<img alt="'.$text.'" src="'.
	   &Apache::loncommon::lonhttpdurl('/res/adm/pages/'.$img).
	   '" align="'.($nobreak==3?'right':'left').'" class="LC_icon" />';
    if ($env{'browser.interface'} eq 'faketextual') {
# Main Menu
	   if ($nobreak==3) {
	       $inlineremote[$idx]="\n".
		   '<td class="LC_menubuttons_text" align="right">'.$text.
		   '</td><td align="left">'.
		   '<a href="javascript:'.$act.';">'.$pic.'</a></td></tr>';
	   } elsif ($nobreak) {
	       $inlineremote[$idx]="\n<tr>".
		   '<td align="left">'.
		   '<a href="javascript:'.$act.';">'.$pic.'</a></td>
                    <td class="LC_menubuttons_text" align="left"><a class="LC_menubuttons_link" href="javascript:'.$act.';"><span class="LC_menubuttons_inline_text">'.$text.'</span></a></td>';
	   } else {
	       $inlineremote[$idx]="\n<tr>".
		   '<td align="left">'.
		   '<a href="javascript:'.$act.';">'.$pic.
		   '</a></td><td class="LC_menubuttons_text" colspan="3">'.
		   '<a class="LC_menubuttons_link" href="javascript:'.$act.';"><span class="LC_menubuttons_inline_text">'.$desc.'</span></a></td></tr>';
	   }
    } else {
# Inline Menu
      $inlineremote[$idx]=
       '<a title="'.$desc.'" class="LC_menubuttons_link" href="javascript:'.$act.';">'.$pic.
       '<span class="LC_menubuttons_inline_text">'.$top.'&nbsp;</span></a>';
    }
    return '';
}

sub secondlevel {
    my $output='';
    my 
    ($uname,$udom,$rol,$crs,$pub,$con,$row,$col,$prt,$img,$top,$bot,$act,$desc,$cat)=@_;
    if ($prt eq 'any') {
	   $output.=&switch($uname,$udom,$row,$col,$img,$top,$bot,$act,$desc,$cat);
    } elsif ($prt=~/^r(\w+)/) {
        if ($rol eq $1) {
           $output.=&switch($uname,$udom,$row,$col,$img,$top,$bot,$act,$desc,$cat);
        }
    }
    return $output;
}

sub inlinemenu {
    undef(@inlineremote);
    undef(%category_members);
# calling rawconfig with "1" will evaluate mydesk.tab, even if there is no active remote control
    &rawconfig(1);
    my $output='<table><tr>';
    for (my $col=1; $col<=2; $col++) {
        $output.='<td class="LC_mainmenu_col_fieldset">';
        for (my $row=1; $row<=8; $row++) {
            foreach my $cat (keys(%category_members)) {
               if ($category_positions{$cat} ne "$col,$row") { next; }
               #$output.='<table><tr><td colspan="4" class="LC_menubuttons_category">'.&mt($category_names{$cat}).'</td></tr>';
               $output.='<div class="LC_Box LC_400Box">';
	       $output.='<h3 class="LC_hcell">'.&mt($category_names{$cat}).'</h3>';
               $output.='<table>';
               my %active=();
               foreach my $menu_item (split(/\:/,$category_members{$cat})) {
                  if ($inlineremote[$menu_item]) {
                     $active{$menu_item}=1;
                  }
               }  
               foreach my $item (sort(keys(%active))) {
                  $output.=$inlineremote[$item];
               }
               $output.='</table>';
               $output.='</div>';
            }
         }
         $output.="</td>";
    }
    $output.="</tr></table>";
    return $output;
}

sub rawconfig {
#
# This evaluates mydesk.tab
# Need to add more positions and more privileges to deal with all
# menu items.
#
    my $textualoverride=shift;
    my $output='';
    return '' unless $textualoverride;
    my $uname=$env{'user.name'};
    my $udom=$env{'user.domain'};
    my $adv=$env{'user.adv'};
    my $show_course=&Apache::loncommon::show_course();
    my $author=$env{'user.author'};
    my $crs='';
    my $crstype='';
    if ($env{'request.course.id'}) {
       $crs='/'.$env{'request.course.id'};
       if ($env{'request.course.sec'}) {
	   $crs.='_'.$env{'request.course.sec'};
       }
       $crs=~s/\_/\//g;
       $crstype = &Apache::loncommon::course_type();
    }
    my $pub=($env{'request.state'} eq 'published');
    my $con=($env{'request.state'} eq 'construct');
    my $rol=$env{'request.role'};
    my $requested_domain = $env{'request.role.domain'};
    foreach my $line (@desklines) {
        my ($row,$col,$pro,$prt,$img,$top,$bot,$act,$desc,$cat)=split(/\:/,$line);
        $prt=~s/\$uname/$uname/g;
        $prt=~s/\$udom/$udom/g;
        if ($prt =~ /\$crs/) {
            next unless ($env{'request.course.id'});
            next if ($crstype eq 'Community');
            $prt=~s/\$crs/$crs/g;
        } elsif ($prt =~ /\$cmty/) {
            next unless ($env{'request.course.id'});
            next if ($crstype ne 'Community');
            $prt=~s/\$cmty/$crs/g;
        }
        $prt=~s/\$requested_domain/$requested_domain/g;
        if ($category_names{$cat}!~/\w/) { $cat='oth'; }
        if ($pro eq 'clear') {
	    $output.=&clear($row,$col);
        } elsif ($pro eq 'any') {
               $output.=&secondlevel(
	  $uname,$udom,$rol,$crs,$pub,$con,$row,$col,$prt,$img,$top,$bot,$act,$desc,$cat);
	} elsif ($pro eq 'smp') {
            unless ($adv) {
               $output.=&secondlevel(
          $uname,$udom,$rol,$crs,$pub,$con,$row,$col,$prt,$img,$top,$bot,$act,$desc,$cat);
            }
        } elsif ($pro eq 'adv') {
            if ($adv) {
               $output.=&secondlevel(
	  $uname,$udom,$rol,$crs,$pub,$con,$row,$col,$prt,$img,$top,$bot,$act,$desc,$cat);
            }
	} elsif ($pro eq 'shc') {
            if ($show_course) {
               $output.=&secondlevel(
          $uname,$udom,$rol,$crs,$pub,$con,$row,$col,$prt,$img,$top,$bot,$act,$desc,$cat);
            }
        } elsif ($pro eq 'nsc') {
            if (!$show_course) {
               $output.=&secondlevel(
	  $uname,$udom,$rol,$crs,$pub,$con,$row,$col,$prt,$img,$top,$bot,$act,$desc,$cat);
            }
        } elsif (($pro=~/^p(\w+)/) && ($prt)) {
            my $priv = $1;
            if ($priv =~ /^mdc(Course|Community)/) {
                if ($crstype eq $1) {
                    $priv = 'mdc';
                } else {
                    next;
                }
            }
	    if (&Apache::lonnet::allowed($priv,$prt)) {
               $output.=&switch($uname,$udom,$row,$col,$img,$top,$bot,$act,$desc,$cat);
            }
        } elsif ($pro eq 'course')  {
            if (($env{'request.course.fn'}) && ($crstype ne 'Community')) {
               $output.=&switch($uname,$udom,$row,$col,$img,$top,$bot,$act,$desc,$cat);
	    }
        } elsif ($pro eq 'community')  {
            if (($env{'request.course.fn'}) && ($crstype eq 'Community')) {
               $output.=&switch($uname,$udom,$row,$col,$img,$top,$bot,$act,$desc,$cat);
            }
        } elsif ($pro =~ /^courseenv_(.*)$/) {
            my $key = $1;
            if ($crstype ne 'Community') {
                my $coursepref = $env{'course.'.$env{'request.course.id'}.'.'.$key};
                if ($key eq 'canuse_pdfforms') {
                    if ($env{'request.course.id'} && $coursepref eq '') {
                        my %domdefs = &Apache::lonnet::get_domain_defaults($env{'course.'.$env{'request.course.id'}.'.domain'});
                        $coursepref = $domdefs{'canuse_pdfforms'};
                    }
                }
                if ($coursepref) { 
                    $output.=&switch($uname,$udom,$row,$col,$img,$top,$bot,$act,$desc,$cat);
                }
            }
        } elsif ($pro =~ /^communityenv_(.*)$/) {
            my $key = $1;
            if ($crstype eq 'Community') {
                my $coursepref = $env{'course.'.$env{'request.course.id'}.'.'.$key};
                if ($key eq 'canuse_pdfforms') {
                    if ($env{'request.course.id'} && $coursepref eq '') {
                        my %domdefs = &Apache::lonnet::get_domain_defaults($env{'course.'.$env{'request.course.id'}.'.domain'});
                        $coursepref = $domdefs{'canuse_pdfforms'};
                    }
                }
                if ($coursepref) { 
                    $output.=&switch($uname,$udom,$row,$col,$img,$top,$bot,$act,$desc,$cat);
                }
            }
        } elsif ($pro =~ /^course_(.*)$/) {
            # Check for permissions inside of a course
            if (($env{'request.course.id'}) && ($crstype ne 'Community') && 
                (&Apache::lonnet::allowed($1,$env{'request.course.id'}.
            ($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:''))
                 )) {
                $output.=&switch($uname,$udom,$row,$col,$img,$top,$bot,$act,$desc,$cat);
	    }
        } elsif ($pro =~ /^community_(.*)$/) {
            # Check for permissions inside of a community
            if (($env{'request.course.id'}) && ($crstype eq 'Community') &&   
                (&Apache::lonnet::allowed($1,$env{'request.course.id'}.
            ($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:''))
                 )) {
                $output.=&switch($uname,$udom,$row,$col,$img,$top,$bot,$act,$desc,$cat);
            }
        } elsif ($pro eq 'author') {
            if ($author) {
                if ((($prt eq 'rca') && ($env{'request.role'}=~/^ca/)) ||
                    (($prt eq 'raa') && ($env{'request.role'}=~/^aa/)) || 
                    (($prt eq 'rau') && ($env{'request.role'}=~/^au/))) {
                    # Check that we are on the correct machine
                    my $cadom=$requested_domain;
                    my $caname=$env{'user.name'};
                    if (($prt eq 'rca') || ($prt eq 'raa')) {
		       ($cadom,$caname)=
                               ($env{'request.role'}=~/($match_domain)\/($match_username)$/);
                    }                       
                    $act =~ s/\$caname/$caname/g;
                    $act =~ s/\$cadom/$cadom/g;
                    my $home = &Apache::lonnet::homeserver($caname,$cadom);
		    my $allowed=0;
		    my @ids=&Apache::lonnet::current_machine_ids();
		    foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
		    if ($allowed) {
                        $output.=&switch($caname,$cadom,
                                        $row,$col,$img,$top,$bot,$act,$desc,$cat);
                    }
                }
            }
        } elsif ($pro eq 'tools') {
            my @tools = ('aboutme','blog','portfolio');
            if (grep(/^\Q$prt\E$/,@tools)) {
                if (!&Apache::lonnet::usertools_access($env{'user.name'},
                                                       $env{'user.domain'},
                                                       $prt,undef,'tools')) {
                    $output.=&clear($row,$col);
                    next;
                }
            } elsif (($prt eq 'reqcrsnsc') || ($prt eq 'reqcrsshc')) {
                if (($prt eq 'reqcrsnsc') && ($show_course))   {
                    next;
                }
                if (($prt eq 'reqcrsshc') && (!$show_course)) {
                    next;
                }
                my $showreqcrs = &check_for_rcrs();
                if (!$showreqcrs) {
                    $output.=&clear($row,$col);
                    next;
                }
            }
            $prt='any';
            $output.=&secondlevel(
          $uname,$udom,$rol,$crs,$pub,$con,$row,$col,$prt,$img,$top,$bot,$act,$desc,$cat);
        }
    }
    return $output;
}

sub check_for_rcrs {
    my $showreqcrs = 0;
    my @reqtypes = ('official','unofficial','community');
    foreach my $type (@reqtypes) {
        if (&Apache::lonnet::usertools_access($env{'user.name'},
                                              $env{'user.domain'},
                                              $type,undef,'requestcourses')) {
            $showreqcrs = 1;
            last;
        }
    }
    if (!$showreqcrs) {
        foreach my $type (@reqtypes) {
            if ($env{'environment.reqcrsotherdom.'.$type} ne '') {
                $showreqcrs = 1;
                last;
            }
        }
    }
    return $showreqcrs;
}

sub dc_popup_js {
    my %lt = &Apache::lonlocal::texthash(
                                          more => '(More ...)',
                                          less => '(Less ...)',
                                        );
    return <<"END";

function showCourseID() {
    document.getElementById('dccid').style.display='block';
    document.getElementById('dccid').style.textAlign='left';
    document.getElementById('dccid').style.textFace='normal';
    document.getElementById('dccidtext').innerHTML ='<a href="javascript:hideCourseID();">$lt{'less'}</a>';
    return;
}

function hideCourseID() {
    document.getElementById('dccid').style.display='none';
    document.getElementById('dccidtext').innerHTML ='<a href="javascript:showCourseID()">$lt{'more'}</a>';
    return;
}

END

}

sub utilityfunctions {
    my $currenturl=&Apache::lonnet::clutter(&Apache::lonnet::fixversion((split(/\?/,$env{'request.noversionuri'}))[0]));
    if ($currenturl =~ m{^/adm/wrapper/ext/}
        && $env{'request.external.querystring'} ) {
            $currenturl .= ($currenturl=~/\?/)?'&':'?'.$env{'request.external.querystring'};
    }
    $currenturl=&Apache::lonenc::check_encrypt(&unescape($currenturl));
    
    my $currentsymb=&Apache::lonenc::check_encrypt($env{'request.symb'});

    my $dc_popup_cid;
    if ($env{'user.adv'} && exists($env{'user.role.dc./'.
                        $env{'course.'.$env{'request.course.id'}.
                                 '.domain'}.'/'})) {
        $dc_popup_cid = &dc_popup_js();
    }

    my $start_page_annotate = 
        &Apache::loncommon::start_page('Annotator',undef,
				       {'only_body' => 1,
					'js_ready'  => 1,
					'bgcolor'   => '#BBBBBB',
					'add_entries' => {
					    'onload' => 'javascript:document.goannotate.submit();'}});

    my $end_page_annotate = 
        &Apache::loncommon::end_page({'js_ready' => 1});

    my $confirm_switch = &mt("Editing requires switching to the resource's home server.").'\n'.
                         &mt('Switch server?');


return (<<ENDUTILITY)

    var currentURL="$currenturl";
    var reloadURL="$currenturl";
    var currentSymb="$currentsymb";

$dc_popup_cid

function go(url) {
   if (url!='' && url!= null) {
       currentURL = null;
       currentSymb= null;
       window.location.href=url;
   }
}

function need_switchserver(url) {
    if (url!='' && url!= null) {
        if (confirm("$confirm_switch")) {
            go(url); 
        }
    }
    return;
}

function gopost(url,postdata) {
   if (url!='') {
      this.document.server.action=url;
      this.document.server.postdata.value=postdata;
      this.document.server.command.value='';
      this.document.server.url.value='';
      this.document.server.symb.value='';
      this.document.server.submit();
   }
}

function gocmd(url,cmd) {
   if (url!='') {
      this.document.server.action=url;
      this.document.server.postdata.value='';
      this.document.server.command.value=cmd;
      this.document.server.url.value=currentURL;
      this.document.server.symb.value=currentSymb;
      this.document.server.submit();
   }
}

function gocstr(url,filename) {
    if (url == '/adm/cfile?action=delete') {
        this.document.cstrdelete.filename.value = filename
        this.document.cstrdelete.submit();
        return;
    }
    if (url == '/adm/printout') {
        this.document.cstrprint.postdata.value = filename
        this.document.cstrprint.curseed.value = 0;
        this.document.cstrprint.problemtype.value = 0;
        if (this.document.lonhomework) {
            if ((this.document.lonhomework.rndseed) && (this.document.lonhomework.rndseed.value != null) && (this.document.lonhomework.rndseed.value != '')) {
                this.document.cstrprint.curseed.value = this.document.lonhomework.rndseed.value
            }
            if (this.document.lonhomework.problemtype) {
		if (this.document.lonhomework.problemtype.value) {
		    this.document.cstrprint.problemtype.value = 
			this.document.lonhomework.problemtype.value;
		} else if (this.document.lonhomework.problemtype.options) {
		    for (var i=0; i<this.document.lonhomework.problemtype.options.length; i++) {
			if (this.document.lonhomework.problemtype.options[i].selected) {
			    if (this.document.lonhomework.problemtype.options[i].value != null && this.document.lonhomework.problemtype.options[i].value != '') { 
				this.document.cstrprint.problemtype.value = this.document.lonhomework.problemtype.options[i].value
				}
			}
		    }
		}
	    }
	}
        this.document.cstrprint.submit();
        return;
    }
    if (url !='') {
        this.document.constspace.filename.value = filename;
        this.document.constspace.action = url;
        this.document.constspace.submit();
    }
}

function golist(url) {
   if (url!='' && url!= null) {
       currentURL = null;
       currentSymb= null;
       top.location.href=url;
   }
}



function catalog_info() {
   openMyModal(window.location.pathname+'.meta',500,400,'yes');
}

function chat_win() {
   lonchat=window.open('/res/adm/pages/chatroom.html',"LONchat",'height=320,width=480,resizable=yes,location=no,menubar=no,toolbar=no');
}

function group_chat(group) {
   var url = '/adm/groupchat?group='+group;
   var winName = 'LONchat_'+group;
   grpchat=window.open(url,winName,'height=320,width=280,resizable=yes,location=no,menubar=no,toolbar=no');
}

function annotate() {
   w_Annotator_flag=1;
   annotator=window.open('','Annotator','width=365,height=265,scrollbars=0');
   annotator.document.write(
   '$start_page_annotate'
  +"<form name='goannotate' target='Annotator' method='post' "
  +"action='/adm/annotations'>"
  +"<input type='hidden' name='symbnew' value='"+currentSymb+"' />"
  +"<\\/form>"
  +'$end_page_annotate');
   annotator.document.close();
}

function open_Wishlist_Import(rat) {
   var newWin;
   if (rat) {
       newWin = window.open('/adm/wishlist?inhibitmenu=yes&mode=import&rat='+rat,
                            'wishlistImport','scrollbars=1,resizable=1,menubar=0');
   }
   else {
       newWin = window.open('/adm/wishlist?inhibitmenu=yes&mode=import',
                            'wishlistImport','scrollbars=1,resizable=1,menubar=0');
   }
   newWin.focus();
}

ENDUTILITY
}

sub serverform {
    return(<<ENDSERVERFORM);
<form name="server" action="/adm/logout" method="post" target="_top">
<input type="hidden" name="postdata" value="none" />
<input type="hidden" name="command" value="none" />
<input type="hidden" name="url" value="none" />
<input type="hidden" name="symb" value="none" />
</form>
ENDSERVERFORM
}

sub constspaceform {
    return(<<ENDCONSTSPACEFORM);
<form name="constspace" action="/adm/logout" method="post" target="_top">
<input type="hidden" name="filename" value="" />
</form>
<form name="cstrdelete" action="/adm/cfile" method="post" target="_top">
<input type="hidden" name="action" value="delete" /> 
<input type="hidden" name="filename" value="" />
</form>
<form name="cstrprint" action="/adm/printout" target="_parent" method="post">
<input type="hidden" name="postdata" value="" />
<input type="hidden" name="curseed" value="" />
<input type="hidden" name="problemtype" value="" />
</form>

ENDCONSTSPACEFORM
}

sub hidden_button_check {
    if ( $env{'request.course.id'} eq ''
         || $env{'request.role.adv'} ) {

        return;
    }
    my $buttonshide = &Apache::lonnet::EXT('resource.0.buttonshide');
    return $buttonshide; 
}

sub roles_selector {
    my ($cdom,$cnum) = @_;
    my $crstype = &Apache::loncommon::course_type();
    my $now = time;
    my (%courseroles,%seccount,%courseprivs);
    my $is_cc;
    my $role_selector;
    my $ccrole;
    if ($crstype eq 'Community') {
        $ccrole = 'co';
    } else {
        $ccrole = 'cc';
    }
    my $priv;
    my $destinationurl = $ENV{'REQUEST_URI'};
    my $reqprivs = &required_privs();
    if (ref($reqprivs) eq 'HASH') {
        my $destination = $destinationurl;
        $destination =~ s/(\?.*)$//;
        if (exists($reqprivs->{$destination})) {
            $priv = $reqprivs->{$destination};
        }
    }
    if ($env{'user.role.'.$ccrole.'./'.$cdom.'/'.$cnum}) {
        my ($start,$end) = split(/\./,$env{'user.role.'.$ccrole.'./'.$cdom.'/'.$cnum});
        
        if ((($start) && ($start<0)) || 
            (($end) && ($end<$now))  ||
            (($start) && ($now<$start))) {
            $is_cc = 0;
        } else {
            $is_cc = 1;
        }
    }
    if ($is_cc) {
        &get_all_courseroles($cdom,$cnum,\%courseroles,\%seccount,\%courseprivs,$priv);
    } else {
        my %gotnosection;
        foreach my $item (keys(%env)) {
            if ($item =~ m-^user\.role\.([^.]+)\./\Q$cdom\E/\Q$cnum\E/?(\w*)$-) {
                my $role = $1;
                my $sec = $2;
                next if ($role eq 'gr');
                my ($start,$end) = split(/\./,$env{$item});
                next if (($start && $start > $now) || ($end && $end < $now));
                if ($sec eq '') {
                    if (!$gotnosection{$role}) {
                        $seccount{$role} ++;
                        $gotnosection{$role} = 1;
                    }
                }
                if ($priv ne '') {
                    my $cnumsec = $cnum;
                    if ($sec ne '') {
                        $cnumsec .= "/$sec";
                    }
                    $courseprivs{"$role./$cdom/$cnumsec./"} =
                        $env{"user.priv.$role./$cdom/$cnumsec./"};
                    $courseprivs{"$role./$cdom/$cnumsec./$cdom/"} =
                        $env{"user.priv.$role./$cdom/$cnumsec./$cdom/"};
                    $courseprivs{"$role./$cdom/$cnumsec./$cdom/$cnumsec"} =
                        $env{"user.priv.$role./$cdom/$cnumsec./$cdom/$cnumsec"};
                }
                if (ref($courseroles{$role}) eq 'ARRAY') {
                    if ($sec ne '') {
                        if (!grep(/^\Q$sec\E$/,@{$courseroles{$role}})) {
                            push(@{$courseroles{$role}},$sec);
                            $seccount{$role} ++;
                        }
                    }
                } else {
                    @{$courseroles{$role}} = ();
                    if ($sec ne '') {
                        $seccount{$role} ++;
                        push(@{$courseroles{$role}},$sec);
                    }
                }
            }
        }
    }
    my $switchtext;
    if ($crstype eq 'Community') {
        $switchtext = &mt('Switch community role to...')
    } else {
        $switchtext = &mt('Switch course role to...')
    }
    my @roles_order = ($ccrole,'in','ta','ep','ad','st');
    if (keys(%courseroles) > 1) {
        $role_selector = &jump_to_role($cdom,$cnum,\%seccount,\%courseroles,\%courseprivs,$priv);
        $role_selector .= '<form name="rolechooser" method="post" action="/adm/roles">
                          <select name="switchrole" onchange="javascript:adhocRole('."'switchrole'".')">';
        $role_selector .= '<option value="">'.$switchtext.'</option>';
        foreach my $role (@roles_order) {
            if (defined($courseroles{$role})) {
                $role_selector .= "\n".'<option value="'.$role.'">'.&Apache::lonnet::plaintext($role,$crstype).'</option>'; 
            }
        }
        foreach my $role (sort(keys(%courseroles))) {
            if ($role =~ /^cr/) {
                $role_selector .= "\n".'<option value="'.$role.'">'.&Apache::lonnet::plaintext($role).'</option>'; 
            }
        }
        $role_selector .= '</select>'."\n".
               '<input type="hidden" name="destinationurl" value="'.
               &HTML::Entities::encode($destinationurl).'" />'."\n".
               '<input type="hidden" name="gotorole" value="1" />'."\n".
               '<input type="hidden" name="selectrole" value="" />'."\n".
               '<input type="hidden" name="switch" value="1" />'."\n".
               '</form>';
    }
    return $role_selector;
}

sub get_all_courseroles {
    my ($cdom,$cnum,$courseroles,$seccount,$courseprivs) = @_;
    unless ((ref($courseroles) eq 'HASH') && (ref($seccount) eq 'HASH') &&
            (ref($courseprivs) eq 'HASH')) {
        return;
    }
    my ($result,$cached) = 
        &Apache::lonnet::is_cached_new('getcourseroles',$cdom.'_'.$cnum);
    if (defined($cached)) {
        if (ref($result) eq 'HASH') {
            if ((ref($result->{'roles'}) eq 'HASH') && 
                (ref($result->{'seccount'}) eq 'HASH') && 
                (ref($result->{'privs'}) eq 'HASH')) {
                %{$courseroles} = %{$result->{'roles'}};
                %{$seccount} = %{$result->{'seccount'}};
                %{$courseprivs} = %{$result->{'privs'}};
                return;
            }
        }
    }
    my %gotnosection;
    my %adv_roles =
         &Apache::lonnet::get_course_adv_roles($env{'request.course.id'},1);
    foreach my $role (keys(%adv_roles)) {
        my ($urole,$usec) = split(/:/,$role);
        if (!$gotnosection{$urole}) {
            $seccount->{$urole} ++;
            $gotnosection{$urole} = 1;
        }
        if (ref($courseroles->{$urole}) eq 'ARRAY') {
            if ($usec ne '') {
                if (!grep(/^Q$usec\E$/,@{$courseroles->{$urole}})) {
                    push(@{$courseroles->{$urole}},$usec);
                    $seccount->{$urole} ++;
                }
            }
        } else {
            @{$courseroles->{$urole}} = ();
            if ($usec ne '') {
                $seccount->{$urole} ++;
                push(@{$courseroles->{$urole}},$usec);
            }
        }
        my $area = '/'.$cdom.'/'.$cnum;
        if ($usec ne '') {
            $area .= '/'.$usec;
        }
        if ($role =~ /^cr\//) {
            &Apache::lonnet::custom_roleprivs($courseprivs,$urole,$cdom,$cnum,$urole.'.'.$area,$area);
        } else {
            &Apache::lonnet::standard_roleprivs($courseprivs,$urole,$cdom,$urole.'.'.$area,$cnum,$area);
        }
    }
    my %sections_count = &Apache::loncommon::get_sections($cdom,$cnum,['st']);
    @{$courseroles->{'st'}} = ();
    &Apache::lonnet::standard_roleprivs($courseprivs,'st',$cdom,"st./$cdom/$cnum",$cnum,"/$cdom/$cnum");
    if (keys(%sections_count) > 0) {
        push(@{$courseroles->{'st'}},keys(%sections_count));
        $seccount->{'st'} = scalar(keys(%sections_count));
    }
    my $rolehash = {
                     'roles'    => $courseroles,
                     'seccount' => $seccount,
                     'privs'    => $courseprivs,
                   };
    &Apache::lonnet::do_cache_new('getcourseroles',$cdom.'_'.$cnum,$rolehash);
    return;
}

sub jump_to_role {
    my ($cdom,$cnum,$seccount,$courseroles,$courseprivs,$priv) = @_;
    my %lt = &Apache::lonlocal::texthash(
                this => 'This role has section(s) associated with it.',
                ente => 'Enter a specific section.',
                orlb => 'Enter a specific section, or leave blank for no section.',
                avai => 'Available sections are:',
                youe => 'You entered an invalid section choice:',
                plst => 'Please try again.',
                role => 'The role you selected is not permitted to view the current page.',
                swit => 'Switch role, but display Main Menu page instead?',
    );
    my $js;
    if (ref($courseroles) eq 'HASH') {
        $js = '    var secpick = new Array("'.$lt{'ente'}.'","'.$lt{'orlb'}.'");'."\n". 
              '    var numsec = new Array();'."\n".
              '    var rolesections = new Array();'."\n".
              '    var rolenames = new Array();'."\n".
              '    var roleseclist = new Array();'."\n";
        my @items = keys(%{$courseroles});
        for (my $i=0; $i<@items; $i++) {
            $js .= '    rolenames['.$i.'] = "'.$items[$i].'";'."\n";
            my ($secs,$secstr);
            if (ref($courseroles->{$items[$i]}) eq 'ARRAY') {
                my @sections = sort { $a <=> $b } @{$courseroles->{$items[$i]}};
                $secs = join('","',@sections);
                $secstr = join(', ',@sections);
            }
            $js .= '    rolesections['.$i.'] = new Array("'.$secs.'");'."\n".
                   '    roleseclist['.$i.'] = "'.$secstr.'";'."\n".
                   '    numsec['.$i.'] = "'.$seccount->{$items[$i]}.'";'."\n";
        }
    }
    my $checkroles = 0;
    if ($priv && ref($courseprivs) eq 'HASH') {
        my (%disallowed,%allowed,@disallow);
        foreach my $role (sort(keys(%{$courseprivs}))) {
            my $trole;
            if ($role =~ m{^(.+?)\Q./$cdom/$cnum\E}) {
                $trole = $1;
            }
            if (($trole ne '') && ($trole ne 'cm')) {
                if ($courseprivs->{$role} =~ /\Q:$priv\E($|:|\&\w+)/) {
                    $allowed{$trole} = 1;
                } else {
                    $disallowed{$trole} = 1;
                }
            }
        }
        foreach my $trole (keys(%disallowed)) {
            unless ($allowed{$trole}) {
                push(@disallow,$trole);
            }
        }
        if (@disallow > 0) {
            $checkroles = 1;
            $js .= "    var disallow = new Array('".join("','",@disallow)."');\n".
                   "    var rolecheck = 1;\n";
        }
    }
    if (!$checkroles) {
        $js .=  "    var disallow = new Array();\n".
                "    rolecheck = 0;\n";
    }
    return <<"END";
<script type="text/javascript">
//<![CDATA[
function adhocRole(roleitem) {
    $js
    var newrole =  document.rolechooser.elements[roleitem].options[document.rolechooser.elements[roleitem].selectedIndex].value;
    if (newrole == '') {
        return;
    } 
    var fullrole = newrole+'./$cdom/$cnum';
    var selidx = '';
    for (var i=0; i<rolenames.length; i++) {
        if (rolenames[i] == newrole) {
            selidx = i;
        }
    }
    if (rolecheck > 0) {
        for (var i=0; i<disallow.length; i++) {
            if (disallow[i] == newrole) {
                if (confirm("$lt{'role'}\\n$lt{'swit'}")) {
                    document.rolechooser.destinationurl.value = '/adm/menu';
                } else {
                    document.rolechooser.elements[roleitem].selectedIndex = 0;
                    return;
                }
            }
        }
    }
    var secok = 1;
    var secchoice = '';
    if (selidx >= 0) {
        if (numsec[selidx] > 1) {
            secok = 0;
            var numrolesec = rolesections[selidx].length;
            var msgidx = numsec[selidx] - numrolesec;
            secchoice = prompt("$lt{'this'} "+secpick[msgidx]+"\\n$lt{'avai'} "+roleseclist[selidx],"");
            if (secchoice == '') {
                if (msgidx > 0) {
                    secok = 1;
                }
            } else {
                for (var j=0; j<rolesections[selidx].length; j++) {
                    if (rolesections[selidx][j] == secchoice) {
                        secok = 1;
                    }
                }
            }
        } else {
            if (rolesections[selidx].length == 1) {
                secchoice = rolesections[selidx][0];
            }
        }
    }
    if (secok == 1) {
        if (secchoice != '') {
            fullrole += '/'+secchoice;
        }
    } else {
        document.rolechooser.elements[roleitem].selectedIndex = 0;
        if (secchoice != null) {
            alert("$lt{'youe'} \\""+secchoice+"\\".\\n $lt{'plst'}");
        }
        return;
    }
    if (fullrole == "$env{'request.role'}") {
        document.rolechooser.elements[roleitem].selectedIndex = 0;
        return;
    }
    itemid = retrieveIndex('gotorole');
    if (itemid != -1) {
        document.rolechooser.elements[itemid].name = fullrole;
    }
    document.rolechooser.elements[roleitem].options[document.rolechooser.elements[roleitem].selectedIndex].value = fullrole;
    document.rolechooser.selectrole.value = '1';
    document.rolechooser.submit();
    return;
}

function retrieveIndex(item) {
    for (var i=0;i<document.rolechooser.elements.length;i++) {
        if (document.rolechooser.elements[i].name == item) {
            return i;
        }
    }
    return -1;
}
// ]]>
</script>
END
}

sub required_privs {
    my $privs =  {
             '/adm/parmset'      => 'opa',
             '/adm/courseprefs'  => 'opa',
             '/adm/whatsnew'     => 'whn',
             '/adm/populate'     => 'cst',
             '/adm/trackstudent' => 'vsa',
             '/adm/statistics'   => 'vgr',
             '/adm/setblock'     => 'dcm',
           };
    unless ($env{'course.'.$env{'request.course.id'}.'.grading'} eq 'spreadsheet') {
        $privs->{'/adm/classcalc'}   = 'vgr',
        $privs->{'/adm/assesscalc'}  = 'vgr',
        $privs->{'/adm/studentcalc'} = 'vgr';
    }
    return $privs;
}

# ================================================================ Main Program

BEGIN {
    if (! defined($readdesk)) {
        {
            my $tabfile = $Apache::lonnet::perlvar{'lonTabDir'}.'/mydesk.tab';
            if ( CORE::open( my $config,"<$tabfile") ) {
                while (my $configline=<$config>) {
                    $configline=(split(/\#/,$configline))[0];
                    $configline=~s/^\s+//;
                    chomp($configline);
                    if ($configline=~/^cat\:/) {
                        my @entries=split(/\:/,$configline);
                        $category_positions{$entries[2]}=$entries[1];
                        $category_names{$entries[2]}=$entries[3];
                    } elsif ($configline=~/^prim\:/) {
                        my @entries = (split(/\:/, $configline))[1..5];
                        push @primary_menu, \@entries;
                    } elsif ($configline=~/^scnd\:/) {
                        my @entries = (split(/\:/, $configline))[1..5];
                        push @secondary_menu, \@entries; 
                    } elsif ($configline) {
                        push(@desklines,$configline);
                    }
                }
                CORE::close($config);
            }
        }
        $readdesk='done';
    }
}

1;
__END__