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Diff for /loncom/interface/lonnavmaps.pm between versions 1.423.2.1 and 1.560

version 1.423.2.1, 2009/05/20 18:34:57	version 1.560, 2022/06/27 20:35:51
Line 31	Line 31

=head1 NAME	=head1 NAME

Apache::lonnavmaps.pm	Apache::lonnavmaps - Subroutines to handle and render the navigation

=head1 SYNOPSIS	=head1 SYNOPSIS

Line 51 described at http://www.lon-capa.org.	Line 51 described at http://www.lon-capa.org.
X<lonnavmaps, overview> When a user enters a course, LON-CAPA examines the	X<lonnavmaps, overview> When a user enters a course, LON-CAPA examines the
course structure and caches it in what is often referred to as the	course structure and caches it in what is often referred to as the
"big hash" X<big hash>. You can see it if you are logged into	"big hash" X<big hash>. You can see it if you are logged into
LON-CAPA, in a course, by going to /adm/test. (You may need to	LON-CAPA, in a course, by going to /adm/test. The content of
tweak the /home/httpd/lonTabs/htpasswd file to view it.) The	the hash will be under the heading "Big Hash".
content of the hash will be under the heading "Big Hash".
	Access to /adm/test is controlled by a domain configuration,
	which a Domain Coordinator will set for a server's default domain
	via: Main Menu > Set domain configuration > Display (Access to
	server status pages checked), and entering a username:domain
	or IP address in the "Show user environment" row. Users with
	an unexpired domain coordinator role in the server's domain
	automatically receive access to /adm/test.

Big Hash contains, among other things, how resources are related	Big Hash contains, among other things, how resources are related
to each other (next/previous), what resources are maps, which	to each other (next/previous), what resources are maps, which
Line 64 processed.	Line 71 processed.

Apache::lonnavmaps provides an object model for manipulating this	Apache::lonnavmaps provides an object model for manipulating this
information in a higher-level fashion than directly manipulating	information in a higher-level fashion than directly manipulating
the hash. It also provides access to several auxilary functions	the hash. It also provides access to several auxiliary functions
that aren't necessarily stored in the Big Hash, but are a per-	that aren't necessarily stored in the Big Hash, but are a per-
resource sort of value, like whether there is any feedback on	resource sort of value, like whether there is any feedback on
a given resource.	a given resource.
Line 77 Apache::lonnavmaps also provides fairly	Line 84 Apache::lonnavmaps also provides fairly
rendering navmaps, and last but not least, provides the navmaps	rendering navmaps, and last but not least, provides the navmaps
view for when the user clicks the NAV button.	view for when the user clicks the NAV button.

B<Note>: Apache::lonnavmaps I<only> works for the "currently	B<Note>: Apache::lonnavmaps by default will show information
logged in user"; if you want things like "due dates for another	for the "currently logged in user". However, if information
student" lonnavmaps can not directly retrieve information like	about resources is needed for a different user, e.g., a bubblesheet
that. You need the EXT function. This module can still help,	exam which uses randomorder, or randompick needs to be printed or
because many things, such as the course structure, are constant	graded for named user(s) or specific CODEs, then the username,
	domain, or CODE can be passed as arguments when creating a new
	navmap object.

	Note if you want things like "due dates for another student",
	you would use the EXT function instead of lonnavmaps.
	That said, the lonnavmaps module can still help, because many
	things, such as the course structure, are usually constant
between users, and Apache::lonnavmaps can help by providing	between users, and Apache::lonnavmaps can help by providing
symbs for the EXT call.	symbs for the EXT call.

Line 91 all, then documents the Apache::lonnavma	Line 105 all, then documents the Apache::lonnavma
is the key to accessing the Big Hash information, covers the use	is the key to accessing the Big Hash information, covers the use
of the Iterator (which provides the logic for traversing the	of the Iterator (which provides the logic for traversing the
somewhat-complicated Big Hash data structure), documents the	somewhat-complicated Big Hash data structure), documents the
Apache::lonnavmaps::Resource objects that are returned by	Apache::lonnavmaps::Resource objects that are returned singularly
	by: getBySymb(), getById(), getByMapPc(), and getResourceByUrl()
	(can also be as an array), or in an array by retrieveResources().

=head1 Subroutine: render	=head1 Subroutine: render

Line 163 If true, the resource's folder will not	Line 179 If true, the resource's folder will not
it. Default is false. True implies printCloseAll is false, since you	it. Default is false. True implies printCloseAll is false, since you
can't close or open folders when this is on anyhow.	can't close or open folders when this is on anyhow.

	=item * B<map_no_edit_link>:

	If true, the title of the folder or page will not be followed by an
	icon/link to direct editing of a folder or composite page, originally
	added via the Course Editor.

=back	=back

=item * B<Apache::lonnavmaps::communication_status>:	=item * B<Apache::lonnavmaps::communication_status>:
Line 335 user into thinking that if the sequence	Line 357 user into thinking that if the sequence
under it; for example, see the "Show Uncompleted Homework" view on the	under it; for example, see the "Show Uncompleted Homework" view on the
B<NAV> screen.	B<NAV> screen.

=item * B<suppressNavmaps>: default: false	=item * B<suppressNavmap>: default: false

If true, will not display Navigate Content resources.	If true, will not display Navigate Content resources.

Line 463 returns 4	Line 485 returns 4

=item add_linkitem()	=item add_linkitem()

=item show_linkitems()	=item show_linkitems_toolbar()

=back	=back

Line 477 use Apache::loncommon();	Line 499 use Apache::loncommon();
use Apache::lonenc();	use Apache::lonenc();
use Apache::lonlocal;	use Apache::lonlocal;
use Apache::lonnet;	use Apache::lonnet;
use POSIX qw (floor strftime);	use Apache::lonmap;

	use POSIX qw (ceil floor strftime);
use Time::HiRes qw( gettimeofday tv_interval );	use Time::HiRes qw( gettimeofday tv_interval );
use LONCAPA;	use LONCAPA;
use DateTime();	use DateTime();
	use HTML::Entities;

	# For debugging

	#use Data::Dumper;


# symbolic constants	# symbolic constants
sub SYMB { return 1; }	sub SYMB { return 1; }
Line 491 sub NOTHING { return 3; }	Line 521 sub NOTHING { return 3; }

my $resObj = "Apache::lonnavmaps::resource";	my $resObj = "Apache::lonnavmaps::resource";

# Keep these mappings in sync with lonquickgrades, which uses the colors	# Keep these mappings in sync with lonquickgrades, which usesthe colors
# instead of the icons.	# instead of the icons.
my %statusIconMap =	my %statusIconMap =
(	(
Line 504 my %statusIconMap =	Line 534 my %statusIconMap =
$resObj->ERROR => ''	$resObj->ERROR => ''
);	);

my %iconAltTags =	my %iconAltTags = #texthash does not work here
( 'navmap.correct.gif' => 'Correct',	( 'navmap.correct.gif' => 'Correct',
'navmap.wrong.gif' => 'Incorrect',	'navmap.wrong.gif' => 'Incorrect',
'navmap.open.gif' => 'Open' );	'navmap.open.gif' => 'Is Open',
	'navmap.partial.gif' => 'Partially Correct',
	'navmap.ellipsis.gif' => 'Attempted',
	);

# Defines a status->color mapping, null string means don't color	# Defines a status->color mapping, null string means don't color
my %colormap =	my %colormap =
Line 523 my %colormap =	Line 556 my %colormap =
$resObj->OPEN => '',	$resObj->OPEN => '',
$resObj->NOTHING_SET => '',	$resObj->NOTHING_SET => '',
$resObj->ATTEMPTED => '',	$resObj->ATTEMPTED => '',
	$resObj->CREDIT_ATTEMPTED => '',
$resObj->ANSWER_SUBMITTED => '',	$resObj->ANSWER_SUBMITTED => '',
$resObj->PARTIALLY_CORRECT => '#006600'	$resObj->PARTIALLY_CORRECT => '#006600'
);	);
Line 530 my %colormap =	Line 564 my %colormap =
# is not yet done and due in less than 24 hours	# is not yet done and due in less than 24 hours
my $hurryUpColor = "#FF0000";	my $hurryUpColor = "#FF0000";

my $future_slots_checked = 0;
my $future_slots = 0;

sub close {
if ($env{'environment.remotenavmap'} ne 'on') { return ''; }
return(<<ENDCLOSE);
<script type="text/javascript">
window.status='Accessing Nav Control';
menu=window.open("/adm/rat/empty.html","loncapanav",
"height=600,width=400,scrollbars=1");
window.status='Closing Nav Control';
menu.close();
window.status='Done.';
</script>
ENDCLOSE
}

sub update {
if ($env{'environment.remotenavmap'} ne 'on') { return ''; }
if (!$env{'request.course.id'}) { return ''; }
if ($ENV{'REQUEST_URI'}=~m\|^/adm/navmaps\|) { return ''; }
return(<<ENDUPDATE);
<form name="navform"></form>
<script type="text/javascript">
this.document.navform.action='/adm/navmaps#curloc';
this.document.navform.target='loncapanav';
this.document.navform.submit();
</script>
ENDUPDATE
}


sub addToFilter {	sub addToFilter {
my $hashIn = shift;	my $hashIn = shift;
my $addition = shift;	my $addition = shift;
Line 590 sub getLinkForResource {	Line 592 sub getLinkForResource {
my $anchor;	my $anchor;
if ($res->is_page()) {	if ($res->is_page()) {
foreach my $item (@$stack) { if (defined($item)) { $anchor = $item; } }	foreach my $item (@$stack) { if (defined($item)) { $anchor = $item; } }
$anchor=&escape($anchor->shown_symb());	if ($anchor->encrypted() && !&advancedUser()) {
	$anchor='LC_'.$anchor->id();
	} else {
	$anchor=&escape($anchor->shown_symb());
	}
return ($res->link(),$res->shown_symb(),$anchor);	return ($res->link(),$res->shown_symb(),$anchor);
}	}
# in case folder was skipped over as "only sequence"	# in case folder was skipped over as "only sequence"
my ($map,$id,$src)=&Apache::lonnet::decode_symb($res->symb());	my ($map,$id,$src)=&Apache::lonnet::decode_symb($res->symb());
if ($map=~/\.page$/) {	if ($map=~/\.page$/) {
my $url=&Apache::lonnet::clutter($map);	my $url=&Apache::lonnet::clutter($map);
$anchor=&escape($src->shown_symb());	$anchor=&escape($res->shown_symb());
return ($url,$res->shown_symb(),$anchor);	return ($url,$res->shown_symb(),$anchor);
}	}
}	}
Line 632 sub getDescription {	Line 638 sub getDescription {
return &mt("Having technical difficulties; please check status later");	return &mt("Having technical difficulties; please check status later");
}	}
if ($status == $res->NOTHING_SET) {	if ($status == $res->NOTHING_SET) {
return &mt("Not currently assigned.");	return &Apache::lonhtmlcommon::direct_parm_link(&mt('Not currently assigned'),$res->symb(),'opendate',$part);
}	}
if ($status == $res->OPEN_LATER) {	if ($status == $res->OPEN_LATER) {
return &mt("Open ") .timeToHumanString($open,'start');	return &mt("Open [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($open,'start'),$res->symb(),'opendate',$part));
}	}
	my $slotinfo;
if ($res->simpleStatus($part) == $res->OPEN) {	if ($res->simpleStatus($part) == $res->OPEN) {
unless (&Apache::lonnet::allowed('mgr',$env{'request.course.id'})) {	unless (&Apache::lonnet::allowed('mgr',$env{'request.course.id'})) {
my ($slot_status,$slot_time,$slot_name)=$res->check_for_slot($part);	my ($slot_status,$slot_time,$slot_name)=$res->check_for_slot($part);
	my $slotmsg;
if ($slot_status == $res->UNKNOWN) {	if ($slot_status == $res->UNKNOWN) {
return &mt('Reservation status unknown');	$slotmsg = &mt('Reservation status unknown');
} elsif ($slot_status == $res->RESERVED) {	} elsif ($slot_status == $res->RESERVED) {
return &mt('Reserved - ends [_1]',	$slotmsg = &mt('Reserved - ends [_1]',
timeToHumanString($slot_time,'end'));	timeToHumanString($slot_time,'end'));
} elsif ($slot_status == $res->RESERVED_LOCATION) {	} elsif ($slot_status == $res->RESERVED_LOCATION) {
return &mt('Reserved - specific location(s) - ends [_1]',	$slotmsg = &mt('Reserved - specific location(s) - ends [_1]',
timeToHumanString($slot_time,'end'));	timeToHumanString($slot_time,'end'));
} elsif ($slot_status == $res->RESERVED_LATER) {	} elsif ($slot_status == $res->RESERVED_LATER) {
return &mt('Reserved - next open [_1]',	$slotmsg = &mt('Reserved - next open [_1]',
timeToHumanString($slot_time,'start'));	timeToHumanString($slot_time,'start'));
} elsif ($slot_status == $res->RESERVABLE) {	} elsif ($slot_status == $res->RESERVABLE) {
return &mt('Reservable ending [_1]',	$slotmsg = &mt('Reservable, reservations close [_1]',
	timeToHumanString($slot_time,'end'));
	} elsif ($slot_status == $res->NEEDS_CHECKIN) {
	$slotmsg = &mt('Reserved, check-in needed - ends [_1]',
timeToHumanString($slot_time,'end'));	timeToHumanString($slot_time,'end'));
} elsif ($slot_status == $res->RESERVABLE_LATER) {	} elsif ($slot_status == $res->RESERVABLE_LATER) {
return &mt('Reservable starting [_1]',	$slotmsg = &mt('Reservable, reservations open [_1]',
timeToHumanString($slot_time,'start'));	timeToHumanString($slot_time,'start'));
} elsif ($slot_status == $res->NOT_IN_A_SLOT) {	} elsif ($slot_status == $res->NOT_IN_A_SLOT) {
return &mt('Reserve a time/place to work');	$slotmsg = &mt('Reserve a time/place to work');
} elsif ($slot_status == $res->NOTRESERVABLE) {	} elsif ($slot_status == $res->NOTRESERVABLE) {
return &mt('Reservation not available');	$slotmsg = &mt('Reservation not available');
} elsif ($slot_status == $res->WAITING_FOR_GRADE) {	} elsif ($slot_status == $res->WAITING_FOR_GRADE) {
return &mt('Submission in grading queue');	$slotmsg = &mt('Submission in grading queue');
	}
	if ($slotmsg) {
	if ($res->is_task() \|\| !$due) {
	return $slotmsg;
	}
	$slotinfo = (' ' x 2).'('.$slotmsg.')';
}	}
}	}
}	}
if ($status == $res->OPEN) {	if ($status == $res->OPEN) {
if ($due) {	if ($due) {
if ($res->is_practice()) {	if ($res->is_practice()) {
return &mt("Closes ")." " .timeToHumanString($due,'start');	return &mt("Closes [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'start'),$res->symb(),'duedate',$part)).$slotinfo;
} else {	} else {
return &mt("Due")." " .timeToHumanString($due,'end');	return &mt("Due [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'end'),$res->symb(),'duedate',$part)).$slotinfo;
}	}
} else {	} else {
return &mt("Open, no due date");	return &Apache::lonhtmlcommon::direct_parm_link(&mt("Open, no due date"),$res->symb(),'duedate',$part).$slotinfo;
}	}
}	}
if ($status == $res->PAST_DUE_ANSWER_LATER) {	if ($status == $res->PAST_DUE_ANSWER_LATER) {
return &mt("Answer open")." " .timeToHumanString($answer,'start');	return &mt("Answer open [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($answer,'start'),$res->symb(),'answerdate',$part));
}	}
if ($status == $res->PAST_DUE_NO_ANSWER) {	if ($status == $res->PAST_DUE_NO_ANSWER) {
if ($res->is_practice()) {	if ($res->is_practice()) {
return &mt("Closed")." " . timeToHumanString($due,'start');	return &mt("Closed [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'start'),$res->symb(),'answerdate,duedate',$part));
} else {	} else {
return &mt("Was due")." " . timeToHumanString($due,'end');	return &mt("Was due [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'end'),$res->symb(),'answerdate,duedate',$part));
}	}
}	}
if (($status == $res->ANSWER_OPEN \|\| $status == $res->PARTIALLY_CORRECT)	if (($status == $res->ANSWER_OPEN \|\| $status == $res->PARTIALLY_CORRECT)
&& $res->handgrade($part) ne 'yes') {	&& $res->handgrade($part) ne 'yes') {
return &mt("Answer available");	my $msg = &mt('Answer available');
	my $parmlist = 'answerdate,duedate';
	if (($res->is_tool) && ($res->is_gradable())) {
	if (($status == $res->PARTIALLY_CORRECT) && ($res->parmval('retrypartial',$part))) {
	$msg = &mt('Grade received');
	$parmlist = 'retrypartial';
	} else {
	$msg = &mt('Grade available');
	}
	}
	return &Apache::lonhtmlcommon::direct_parm_link($msg,$res->symb(),$parmlist,$part);
}	}
if ($status == $res->EXCUSED) {	if ($status == $res->EXCUSED) {
return &mt("Excused by instructor");	return &mt("Excused by instructor");
}	}
if ($status == $res->ATTEMPTED) {	if ($status == $res->ATTEMPTED) {
return &mt("Answer submitted, not yet graded");	if ($res->is_anonsurvey($part) \|\| $res->is_survey($part)) {
	return &mt("Survey submission recorded");
	} else {
	return &mt("Answer submitted, not yet graded");
	}
	}
	if ($status == $res->CREDIT_ATTEMPTED) {
	if ($res->is_anonsurvey($part) \|\| $res->is_survey($part)) {
	return &mt("Credit for survey submission");
	}
}	}
if ($status == $res->TRIES_LEFT) {	if ($status == $res->TRIES_LEFT) {
my $tries = $res->tries($part);	my $tries = $res->tries($part);
my $maxtries = $res->maxtries($part);	my $maxtries = $res->maxtries($part);
my $triesString = "";	my $triesString = "";
if ($tries && $maxtries) {	if ($tries && $maxtries) {
$triesString = '<font size="-1"><i>('.&mt('[_1] of [quant,_2,try,tries] used',$tries,$maxtries).')</i></font>';	$triesString = '<span class="LC_fontsize_medium"><i>('.&mt('[_1] of [quant,_2,try,tries] used',$tries,$maxtries).')</i></span>';
if ($maxtries > 1 && $maxtries - $tries == 1) {	if ($maxtries > 1 && $maxtries - $tries == 1) {
$triesString = "<b>$triesString</b>";	$triesString = "<b>$triesString</b>";
}	}
}	}
if ($due) {	if ($due) {
return &mt("Due")." " . timeToHumanString($due,'end') .	return &mt("Due [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'end'),$res->symb(),'duedate',$part)) .
" $triesString";	" $triesString";
} else {	} else {
return &mt("No due date")." $triesString";	return &Apache::lonhtmlcommon::direct_parm_link(&mt("No due date"),$res->symb(),'duedate',$part)." $triesString";
}	}
}	}
if ($status == $res->ANSWER_SUBMITTED) {	if ($status == $res->ANSWER_SUBMITTED) {
Line 793 sub timeToHumanString {	Line 829 sub timeToHumanString {

# Less than an hour	# Less than an hour
if ( $delta < $hour ) {	if ( $delta < $hour ) {
# If so, use minutes	# If so, use minutes; or minutes, seconds (if format requires)
my $minutes = floor($delta / 60);	my $minutes = floor($delta / 60);
	if (($format ne '') && ($format =~ /\%(T\|S)/)) {
	my $display;
	if ($minutes == 1) {
	$display = "${prefix}1 minute";
	} else {
	$display = "$prefix$minutes minutes";
	}
	my $seconds = $delta % $minute;
	if ($seconds == 0) {
	$display .= $tense;
	} elsif ($seconds == 1) {
	$display .= ", 1 second$tense";
	} else {
	$display .= ", $seconds seconds$tense";
	}
	return $display;
	}
if ($minutes == 1) { return "${prefix}1 minute$tense"; }	if ($minutes == 1) { return "${prefix}1 minute$tense"; }
return "$prefix$minutes minutes$tense";	return "$prefix$minutes minutes$tense";
}	}

# Is it less than 24 hours away? If so,	# Is it less than 24 hours away? If so,
# display hours + minutes	# display hours + minutes, (and + seconds, if format specified it)
if ( $delta < $hour * 24) {	if ( $delta < $hour * 24) {
my $hours = floor($delta / $hour);	my $hours = floor($delta / $hour);
my $minutes = floor(($delta % $hour) / $minute);	my $minutes = floor(($delta % $hour) / $minute);
Line 815 sub timeToHumanString {	Line 868 sub timeToHumanString {
if ($minutes == 0) {	if ($minutes == 0) {
$minuteString = "";	$minuteString = "";
}	}
	if (($format ne '') && ($format =~ /\%(T\|S)/)) {
	my $display = "$prefix$hourString$minuteString";
	my $seconds = $delta-(($hours * $hour)+($minutes * $minute));
	if ($seconds == 0) {
	$display .= $tense;
	} elsif ($seconds == 1) {
	$display .= ", 1 second$tense";
	} else {
	$display .= ", $seconds seconds$tense";
	}
	return $display;
	}
return "$prefix$hourString$minuteString$tense";	return "$prefix$hourString$minuteString$tense";
}	}

	# Date/time is more than 24 hours away

my $dt = DateTime->from_epoch(epoch => $time)	my $dt = DateTime->from_epoch(epoch => $time)
->set_time_zone(&Apache::lonlocal::gettimezone());	->set_time_zone(&Apache::lonlocal::gettimezone());

# If there's a caller supplied format, use it.	# If there's a caller supplied format, use it, unless it only displays
	# H:M:S or H:M.

if ($format ne '') {	if (($format ne '') && ($format ne '%T') && ($format ne '%R')) {
my $timeStr = $dt->strftime($format);	my $timeStr = $dt->strftime($format);
return $timeStr.' ('.$dt->time_zone_short_name().')';	return $timeStr.' ('.$dt->time_zone_short_name().')';
}	}
Line 875 sub part_status_summary { return 4; }	Line 943 sub part_status_summary { return 4; }
sub render_resource {	sub render_resource {
my ($resource, $part, $params) = @_;	my ($resource, $part, $params) = @_;

	my $editmapLink;
my $nonLinkedText = ''; # stuff after resource title not in link	my $nonLinkedText = ''; # stuff after resource title not in link

my $link = $params->{"resourceLink"};	my $link = $params->{"resourceLink"};
	if ($resource->ext()) {
	$link =~ s/\#.+(\?)/$1/g;
	}

# The URL part is not escaped at this point, but the symb is...	# The URL part is not escaped at this point, but the symb is...
# The stuff to the left of the ? must have ' replaced by \' since
# it will be quoted with ' in the href.

my ($left,$right) = split(/\?/, $link);
$link = $left.'?'.$right;

my $src = $resource->src();	my $src = $resource->src();
my $it = $params->{"iterator"};	my $it = $params->{"iterator"};
Line 897 sub render_resource {	Line 964 sub render_resource {
my $location=&Apache::loncommon::lonhttpdurl("/adm/lonIcons");	my $location=&Apache::loncommon::lonhttpdurl("/adm/lonIcons");
# If this is a new branch, label it so	# If this is a new branch, label it so
if ($params->{'isNewBranch'}) {	if ($params->{'isNewBranch'}) {
$newBranchText = '<img src="'.$location.'/branch.gif" border="0" alt="'.	$newBranchText = "<img src='$location/branch.gif' alt=".mt('Branch')." />";
&mt('Branch').'" />';
}	}

# links to open and close the folder	my $whitespace = $location.'/whitespace_21.gif';
	my ($nomodal,$linkopen,$linkclose);
	unless ($resource->is_map() \|\| $params->{'resource_nolink'}) {
my $linkopen = "<a href=\"$link\">";	$linkopen = "<img src='$whitespace' alt='' />";
	$linkclose = "</a>";
	if (($params->{'modalLink'}) && (!$resource->is_sequence())) {
my $linkclose = "</a>";	if ($link =~m{^(?:\|/adm/wrapper)/ext/([^#]+)}) {
	my $exturl = $1;
	if (($ENV{'SERVER_PORT'} == 443) && ($exturl !~ /^https:/)) {
	$nomodal = 1;
	}
	} elsif (($link eq "/public/$LONCAPA::match_domain/$LONCAPA::match_courseid/syllabus") &&
	($env{'request.course.id'}) && ($ENV{'SERVER_PORT'} == 443) &&
	($env{'course.'.$env{'request.course.id'}.'.externalsyllabus'} =~ m{^http://})) {
	$nomodal = 1;
	}
	my $esclink = &js_escape($link);
	if ($nomodal) {
	$linkopen .= "<a href=\"#\" onclick=\"javascript:window.open('$esclink','resourcepreview','height=400,width=500,scrollbars=1,resizable=1,menubar=0,location=1'); return false;\" />";
	} else {
	$linkopen .= "<a href=\"$link\" onclick=\"javascript:openMyModal('$esclink',600,500,'yes','true'); return false;\">";
	}
	} else {
	$linkopen .= "<a href=\"$link\">";
	}
	}

# Default icon: unknown page	# Default icon: unknown page
my $icon = "<img src='$location/unknown.gif' alt='' border='0' alt='  ' ' />";	my $icon = "<img class=\"LC_contentImage\" src='$location/unknown.gif' alt='' />";

if ($resource->is_problem()) {	if ($resource->is_problem()) {
if ($part eq '0' \|\| $params->{'condensed'}) {	if ($part eq '0' \|\| $params->{'condensed'}) {
$icon = '<img src="'.$location.'/';	$icon = '<img class="LC_contentImage" src="'.$location.'/';
if ($resource->is_task()) {	if ($resource->is_task()) {
$icon .= 'task.gif" alt="'.&mt('Task');	$icon .= 'task.gif" alt="'.&mt('Task');
} else {	} else {
$icon .= 'problem.gif" alt="'.&mt('Problem');	$icon .= 'problem.gif" alt="'.&mt('Problem');
}	}
$icon .='" border="0" />';	$icon .='" />';
} else {	} else {
$icon = $params->{'indentString'};	$icon = $params->{'indentString'};
}	}
} else {	} else {
$icon = "<img src='".&Apache::loncommon::icon($resource->src)."' alt='  ' border='0' />";	$icon = "<img class=\"LC_contentImage\" src='".&Apache::loncommon::icon($resource->src)."' alt='' />";
}	}

# Display the correct map icon to open or shut map	# Display the correct map icon to open or shut map
Line 935 sub render_resource {	Line 1020 sub render_resource {
if ($it->{CONDITION}) {	if ($it->{CONDITION}) {
$nowOpen = !$nowOpen;	$nowOpen = !$nowOpen;
}	}

my $folderType = $resource->is_sequence() ? 'folder' : 'page';	my $folderType = $resource->is_sequence() ? 'folder' : 'page';
my $title=$resource->title;	my $title=$resource->title;
$title=~s/\"/\"/g;	$title=~s/\"/\&qout;/g;
if (!$params->{'resource_no_folder_link'}) {	if (!$params->{'resource_no_folder_link'}) {
$icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') . '.gif';	$icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') . '.gif';
$icon = "<img src='$location/$icon' alt=\"".	$icon = "<img src='$location/arrow." . ($nowOpen ? 'closed' : 'open') . ".gif' alt='' />"
($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" border='0' />";	."<img class=\"LC_contentImage\" src='$location/$icon' alt=\""
	.($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" />";
$linkopen = "<a href=\"" . $params->{'url'} . '?' .	$linkopen = "<a href=\"" . $params->{'url'} . '?' .
$params->{'queryString'} . '&filter=';	$params->{'queryString'} . '&filter=';
$linkopen .= ($nowOpen xor $it->{CONDITION}) ?	$linkopen .= ($nowOpen xor $it->{CONDITION}) ?
Line 955 sub render_resource {	Line 1040 sub render_resource {
'&jump=' .	'&jump=' .
&escape($resource->symb()) .	&escape($resource->symb()) .
"&folderManip=1\">";	"&folderManip=1\">";
	$linkclose = '</a>';
} else {	} else {
# Don't allow users to manipulate folder	# Don't allow users to manipulate folder
$icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') .	$icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') . '.gif';
'.nomanip.gif';	$icon = "<img class=\"LC_space\" src='$whitespace' alt='' />"."<img class=\"LC_contentImage\" src='$location/$icon' alt=\"".($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" />";
$icon = "<img src='$location/$icon' alt=\"".	if ($params->{'caller'} eq 'sequence') {
($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" border='0' />";	$linkopen = "<a href=\"$link\">";
	$linkclose = '</a>';
$linkopen = "";	} else {
$linkclose = "";	$linkopen = "";
	$linkclose = "";
	}
	}
	if (((&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) \|\|
	(&Apache::lonnet::allowed('cev',$env{'request.course.id'}))) &&
	($resource->symb=~/\_\_\_[^\_]+\_\_\_uploaded/)) {
	if (!$params->{'map_no_edit_link'}) {
	my $icon = &Apache::loncommon::lonhttpdurl('/res/adm/pages').'/editmap.png';
	$editmapLink=' '.
	'<a href="/adm/coursedocs?command=directnav&symb='.&escape($resource->symb()).'">'.
	'<img src="'.$icon.'" alt="'.&mt('Edit Content').'" title="'.&mt('Edit Content').'" />'.
	'</a>';
	}
	}
	if ($params->{'mapHidden'} \|\| $resource->randomout()) {
	$nonLinkedText .= ' <span class="LC_warning">('.&mt('hidden').')</span> ';
	} elsif ($params->{'mapUnlisted'}) {
	$nonLinkedText .= ' <span class="LC_warning">('.&mt('unlisted').')</span> ';
	} elsif ($params->{'mapHiddenDeepLink'} \|\| $resource->deeplinkout()) {
	$nonLinkedText .= ' <span class="LC_warning">('.&mt('not shown').')</span> ';
	}
	} else {
	if ($resource->randomout()) {
	$nonLinkedText .= ' <span class="LC_warning">('.&mt('hidden').')</span> ';
	} elsif ($resource->deeplinkout()) {
	$nonLinkedText .= ' <span class="LC_warning">('.&mt('not shown').')</span> ';
	} else {
	my $deeplink = $resource->deeplink($params->{caller});
	if ((($deeplink eq 'absent') \|\| ($deeplink eq 'grades')) &&
	&advancedUser()) {
	$nonLinkedText .= ' <span class="LC_warning">('.&mt('unlisted').')</span> ';
	} elsif (($deeplink) && ($deeplink) ne 'full') {
	if (&advancedUser()) {
	$nonLinkedText .= ' <span class="LC_warning">('.&mt('deep-link access').
	')</span> ';
	} else {
	$nonLinkedText .= ' <span class="LC_warning">('.&mt('access via external site').
	')</span> ';
	}
	}
}	}
}

if ($resource->randomout()) {
$nonLinkedText .= ' <i>('.&mt('hidden').')</i> ';
}	}
if (!$resource->condval()) {	if (!$resource->condval()) {
$nonLinkedText .= ' <i>('.&mt('conditionally hidden').')</i> ';	$nonLinkedText .= ' <span class="LC_info">('.&mt('conditionally hidden').')</span> ';
}	}
if (($resource->is_practice()) && ($resource->is_raw_problem())) {	if (($resource->is_practice()) && ($resource->is_raw_problem())) {
$nonLinkedText .=' <font color="green"><b>'.&mt('not graded').'</b></font>';	$nonLinkedText .=' <span class="LC_info"><b>'.&mt('not graded').'</b></span>';
}	}

# We're done preparing and finally ready to start the rendering
my $result = "<td align='left' valign='middle'>";

	# We're done preparing and finally ready to start the rendering
	my $result = '<td class="LC_middle">';
	my $newfolderType = $resource->is_sequence() ? 'folder' : 'page';

my $indentLevel = $params->{'indentLevel'};	my $indentLevel = $params->{'indentLevel'};
if ($newBranchText) { $indentLevel--; }	if ($newBranchText) { $indentLevel--; }

Line 990 sub render_resource {	Line 1112 sub render_resource {
}	}

# Decide what to display	# Decide what to display

$result .= "$newBranchText$linkopen$icon$linkclose";	$result .= "$newBranchText$linkopen$icon$linkclose";

my $curMarkerBegin = '';	my $curMarkerBegin = '';
Line 999 sub render_resource {	Line 1120 sub render_resource {
# Is this the current resource?	# Is this the current resource?
if (!$params->{'displayedHereMarker'} &&	if (!$params->{'displayedHereMarker'} &&
$resource->symb() eq $params->{'here'} ) {	$resource->symb() eq $params->{'here'} ) {
$curMarkerBegin = '<span class="LC_fontcolor_red LC_fontsize_large">></span>';	unless ($resource->is_map()) {
$curMarkerEnd = '<span class="LC_fontcolor_red LC_fontsize_large"><</span>';	$curMarkerBegin = '<span class="LC_current_nav_location">';
$params->{'displayedHereMarker'} = 1;	$curMarkerEnd = '</span>';
	}
	$params->{'displayedHereMarker'} = 1;
}	}

if ($resource->is_problem() && $part ne '0' &&	if ($resource->is_problem() && $part ne '0' &&
Line 1016 sub render_resource {	Line 1139 sub render_resource {
$nonLinkedText .= ' ('.&mt('[_1] parts', $resource->countParts()).')';	$nonLinkedText .= ' ('.&mt('[_1] parts', $resource->countParts()).')';
}	}

my $target;
if ($env{'environment.remotenavmap'} eq 'on') {
$target=' target="loncapaclient" ';
}
if (!$params->{'resource_nolink'} && !$resource->is_sequence() && !$resource->is_empty_sequence) {	if (!$params->{'resource_nolink'} && !$resource->is_sequence() && !$resource->is_empty_sequence) {
$result .= " $curMarkerBegin<a $target href=\"$link\">$title$partLabel</a>$curMarkerEnd $nonLinkedText</td>";	$linkclose = '</a>';
} else {	if ($params->{'modalLink'}) {
$result .= " $curMarkerBegin$title$partLabel$curMarkerEnd $nonLinkedText</td>";	my $esclink = &js_escape($link);
	if ($nomodal) {
	$linkopen = "<a href=\"#\" onclick=\"javascript:window.open('$esclink','resourcepreview','height=400,width=500,scrollbars=1,resizable=1,menubar=0,location=1'); return false;\" />";
	} else {
	$linkopen = "<a href=\"$link\" onclick=\"javascript:openMyModal('$esclink',600,500,'yes','true'); return false;\">";
	}
	} else {
	$linkopen = "<a href=\"$link\">";
	}
}	}
	$result .= "$curMarkerBegin$linkopen$title$partLabel$linkclose$curMarkerEnd$editmapLink$nonLinkedText</td>";

return $result;	return $result;
}	}
Line 1034 sub render_communication_status {	Line 1162 sub render_communication_status {
my $discussionHTML = ""; my $feedbackHTML = ""; my $errorHTML = "";	my $discussionHTML = ""; my $feedbackHTML = ""; my $errorHTML = "";

my $link = $params->{"resourceLink"};	my $link = $params->{"resourceLink"};
my $target;	my $linkopen = "<a href=\"$link\">";
if ($env{'environment.remotenavmap'} eq 'on') {
$target=' target="loncapaclient" ';
}
my $linkopen = "<a $target href=\"$link\">";
my $linkclose = "</a>";	my $linkclose = "</a>";
my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");	my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");

if ($resource->hasDiscussion()) {	if ($resource->hasDiscussion()) {
$discussionHTML = $linkopen .	$discussionHTML = $linkopen .
'<img alt="'.&mt('New Discussion').'" border="0" src="'.$location.'/chat.gif" />' .	'<img alt="'.&mt('New Discussion').'" src="'.$location.'/chat.gif" title="'.&mt('New Discussion').'"/>' .
$linkclose;	$linkclose;
}	}

Line 1051 sub render_communication_status {	Line 1176 sub render_communication_status {
my $feedback = $resource->getFeedback();	my $feedback = $resource->getFeedback();
foreach my $msgid (split(/\,/, $feedback)) {	foreach my $msgid (split(/\,/, $feedback)) {
if ($msgid) {	if ($msgid) {
$feedbackHTML .= ' <a '.$target.' href="/adm/email?display='	$feedbackHTML .= ' <a href="/adm/email?display='
. &escape($msgid) . '">'	. &escape($msgid) . '">'
. '<img alt="'.&mt('New E-mail').'" src="'.$location.'/feedback.gif" '	. '<img alt="'.&mt('New E-mail').'" src="'.$location.'/feedback.gif" title="'.&mt('New E-mail').'"/></a>';
. 'border="0" /></a>';
}	}
}	}
}	}
Line 1066 sub render_communication_status {	Line 1190 sub render_communication_status {
last if ($errorcount>=10); # Only output 10 bombs maximum	last if ($errorcount>=10); # Only output 10 bombs maximum
if ($msgid) {	if ($msgid) {
$errorcount++;	$errorcount++;
$errorHTML .= ' <a '.$target.' href="/adm/email?display='	$errorHTML .= ' <a href="/adm/email?display='
. &escape($msgid) . '">'	. &escape($msgid) . '">'
. '<img alt="'.&mt('New Error').'" src="'.$location.'/bomb.gif" '	. '<img alt="'.&mt('New Error').'" src="'.$location.'/bomb.gif" title="'.&mt('New Error').'"/></a>';
. 'border="0" /></a>';
}	}
}	}
}	}
Line 1077 sub render_communication_status {	Line 1200 sub render_communication_status {
if ($params->{'multipart'} && $part != '0') {	if ($params->{'multipart'} && $part != '0') {
$discussionHTML = $feedbackHTML = $errorHTML = '';	$discussionHTML = $feedbackHTML = $errorHTML = '';
}	}
	return "<td class=\"LC_middle\">$discussionHTML$feedbackHTML$errorHTML </td>";
return "<td width=\"75\" align=\"left\" valign=\"middle\">$discussionHTML$feedbackHTML$errorHTML </td>";

}	}
sub render_quick_status {	sub render_quick_status {
Line 1088 sub render_quick_status {	Line 1210 sub render_quick_status {
$params->{'multipart'} && $part eq "0";	$params->{'multipart'} && $part eq "0";

my $link = $params->{"resourceLink"};	my $link = $params->{"resourceLink"};
my $target;	my $linkopen = "<a href=\"$link\">";
if ($env{'environment.remotenavmap'} eq 'on') {
$target=' target="loncapaclient" ';
}
my $linkopen = "<a $target href=\"$link\">";
my $linkclose = "</a>";	my $linkclose = "</a>";

if ($resource->is_problem() &&
!$firstDisplayed) {

	$result .= '<td class="LC_middle">';
	if ($resource->is_gradable() &&
	!$firstDisplayed) {
my $icon = $statusIconMap{$resource->simpleStatus($part)};	my $icon = $statusIconMap{$resource->simpleStatus($part)};
my $alt = $iconAltTags{$icon};	my $alt = $iconAltTags{$icon};
if ($icon) {	if ($icon) {
my $location=	my $location=
&Apache::loncommon::lonhttpdurl("/adm/lonIcons/$icon");	&Apache::loncommon::lonhttpdurl("/adm/lonIcons/$icon");
$result .= "<td valign='middle' width='50' align='right'>$linkopen<img width='25' height='25' src='$location' border='0' alt='$alt' />$linkclose</td>\n";	$result .= $linkopen.'<img src="'.$location.'" alt="'.&mt($alt).'" title="'.&mt($alt).'" />'.$linkclose;
} else {	} else {
$result .= "<td width='30'> </td>\n";	$result .= " ";
}	}
} else { # not problem, no icon	} else { # not problem, no icon
$result .= "<td width='30'> </td>\n";	$result .= " ";
}	}
	$result .= "</td>\n";
return $result;	return $result;
}	}
sub render_long_status {	sub render_long_status {
my ($resource, $part, $params) = @_;	my ($resource, $part, $params) = @_;
my $result = "<td align='right' valign='middle'>\n";	my $result = '<td class="LC_middle LC_right">';
my $firstDisplayed = !$params->{'condensed'} &&	my $firstDisplayed = !$params->{'condensed'} &&
$params->{'multipart'} && $part eq "0";	$params->{'multipart'} && $part eq "0";

my $color;	my $color;
if ($resource->is_problem() \|\| $resource->is_practice()) {	my $info = '';
	if ($resource->is_gradable() \|\| $resource->is_practice()) {
$color = $colormap{$resource->status};	$color = $colormap{$resource->status};

if (dueInLessThan24Hours($resource, $part) \|\|	if (dueInLessThan24Hours($resource, $part)) {
lastTry($resource, $part)) {
$color = $hurryUpColor;	$color = $hurryUpColor;
}	$info = ' title="'.&mt('Due in less than 24 hours!').'"';
	} elsif (lastTry($resource, $part)) {
	unless (($resource->problemstatus($part) eq 'no') \|\|
	($resource->problemstatus($part) eq 'no_feedback_ever')) {
	$color = $hurryUpColor;
	$info = ' title="'.&mt('One try remaining!').'"';
	}
	}
}	}

if ($resource->kind() eq "res" &&	if (($resource->kind() eq "res") &&
($resource->is_problem() \|\| $resource->is_practice()) &&	($resource->is_raw_problem() \|\| $resource->is_gradable()) &&
!$firstDisplayed) {	!$firstDisplayed) {
if ($color) {$result .= "<font color=\"$color\"><b>"; }	if ($color) {$result .= '<span style="color:'.$color.'"'.$info.'><b>'; }
$result .= getDescription($resource, $part);	$result .= getDescription($resource, $part);
if ($color) {$result .= "</b></font>"; }	if ($color) {$result .= "</b></span>"; }
}	}
if ($resource->is_map() && &advancedUser() && $resource->randompick()) {	if ($resource->is_map() && &advancedUser() && $resource->randompick()) {
$result .= &mt('(randomly select [_1])', $resource->randompick());	$result .= &mt('(randomly select [_1])', $resource->randompick());
Line 1177 my @statuses = ($resObj->CORRECT, $resOb	Line 1302 my @statuses = ($resObj->CORRECT, $resOb

sub render_parts_summary_status {	sub render_parts_summary_status {
my ($resource, $part, $params) = @_;	my ($resource, $part, $params) = @_;
if (!$resource->is_problem() && !$resource->contains_problem) { return '<td></td>'; }	if (!$resource->is_gradable() && !$resource->contains_problem) { return '<td></td>'; }
if ($params->{showParts}) {	if ($params->{showParts}) {
return '<td></td>';	return '<td></td>';
}	}
Line 1216 sub render_parts_summary_status {	Line 1341 sub render_parts_summary_status {
}	}
$return.= $td . $totalParts . ' parts: ';	$return.= $td . $totalParts . ' parts: ';
foreach my $status (@statuses) {	foreach my $status (@statuses) {
if ($overallstatus{$status}) {	if ($overallstatus{$status}) {
$return.="<font color='" . $statusColors{$status} .	$return.='<span style="color:' . $statusColors{$status}
"'>" . $overallstatus{$status} . ' '	. '">' . $overallstatus{$status} . ' '
. $statusStrings{$status} . "</font>";	. $statusStrings{$status} . '</span>';
}	}
}	}
$return.= $endtd;	$return.= $endtd;
return $return;	return $return;
Line 1288 sub render {	Line 1413 sub render {
# Without renaming the filterfunc, the server seems to go into	# Without renaming the filterfunc, the server seems to go into
# an infinite loop	# an infinite loop
my $oldFilterFunc = $filterFunc;	my $oldFilterFunc = $filterFunc;
$filterFunc = sub { my $res = shift; return !$res->randomout() &&	$filterFunc = sub { my $res = shift; return !$res->randomout() &&
	($res->deeplink($args->{'caller'}) ne 'absent') &&
	($res->deeplink($args->{'caller'}) ne 'grades') &&
	!$res->deeplinkout() &&
&$oldFilterFunc($res);};	&$oldFilterFunc($res);};
}	}

my $condition = 0;	my $condition = 0;
if ($env{'form.condition'}) {	if ($env{'form.condition'}) {
$condition = 1;	$condition = 1;
	} elsif (($env{'request.deeplink.login'}) && ($env{'request.course.id'}) && (!$userCanSeeHidden)) {
	if (!defined($navmap)) {
	$navmap = Apache::lonnavmaps::navmap->new();
	}
	if (defined($navmap)) {
	my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
	my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
	my $symb = &Apache::loncommon::symb_from_tinyurl($env{'request.deeplink.login'},$cnum,$cdom);
	if ($symb) {
	my $deeplink;
	my $res = $navmap->getBySymb($symb);
	if ($res->is_map()) {
	my $mapname = &Apache::lonnet::declutter($res->src());
	$mapname = &Apache::lonnet::deversion($mapname);
	$deeplink = $navmap->get_mapparam(undef,$mapname,"0.deeplink");
	} else {
	$deeplink = $res->deeplink();
	}
	if ($deeplink ne '') {
	if ((split(/,/,$deeplink))[1] eq 'hide') {
	if ($res->is_map()) {
	map { $filterHash->{$_} = 1 if $_ } split(/,/,$res->map_hierarchy());
	} else {
	my $mapurl = (&Apache::lonnet::decode_symb($symb))[0];
	my $map = $navmap->getResourceByUrl($mapurl);
	map { $filterHash->{$_} = 1 if $_ } split(/,/,$map->map_hierarchy());
	}
	}
	}
	}
	}
}	}

if (!$env{'form.folderManip'} && !defined($args->{'iterator'})) {	if (!$env{'form.folderManip'} && !defined($args->{'iterator'}) && !$args->{'nocurrloc'}) {
# Step 1: Check to see if we have a navmap	# Step 1: Check to see if we have a navmap
if (!defined($navmap)) {	if (!defined($navmap)) {
$navmap = Apache::lonnavmaps::navmap->new();	$navmap = Apache::lonnavmaps::navmap->new();
Line 1318 sub render {	Line 1477 sub render {
my $currenturl = $env{'form.postdata'};	my $currenturl = $env{'form.postdata'};
#$currenturl=~s/^http\:\/\///;	#$currenturl=~s/^http\:\/\///;
#$currenturl=~s/^[^\/]+//;	#$currenturl=~s/^[^\/]+//;
	unless ($args->{'caller'} eq 'sequence') {
$here = $jump = &Apache::lonnet::symbread($currenturl);	$here = $jump = &Apache::lonnet::symbread($currenturl);
	}
}	}
if ($here eq '') {	if (($here eq '') && ($args->{'caller'} ne 'sequence')) {
my $last;	my $last;
if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',	if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
&GDBM_READER(),0640)) {	&GDBM_READER(),0640)) {
Line 1335 sub render {	Line 1495 sub render {
my $mapIterator = $navmap->getIterator(undef, undef, undef, 1);	my $mapIterator = $navmap->getIterator(undef, undef, undef, 1);
my $curRes;	my $curRes;
my $found = 0;	my $found = 0;
	my $here_is_navmaps = 0;
	if ($here =~ m{___\d+___adm/navmaps$}) {
	$here_is_navmaps = 1;
	}

# We only need to do this if we need to open the maps to show the	# We only need to do this if we need to open the maps to show the
# current position. This will change the counter so we can't count	# current position. This will change the counter so we can't count
# for the jump marker with this loop.	# for the jump marker with this loop.
while ($here && ($curRes = $mapIterator->next()) && !$found) {	while ($here && ($curRes = $mapIterator->next()) && !$found && !$here_is_navmaps) {
if (ref($curRes) && $curRes->symb() eq $here) {	if (ref($curRes) && $curRes->symb() eq $here) {
my $mapStack = $mapIterator->getStack();	my $mapStack = $mapIterator->getStack();

Line 1381 sub render {	Line 1545 sub render {
if ($args->{'iterator_map'}) {	if ($args->{'iterator_map'}) {
my $map = $args->{'iterator_map'};	my $map = $args->{'iterator_map'};
$map = $navmap->getResourceByUrl($map);	$map = $navmap->getResourceByUrl($map);
my $firstResource = $map->map_start();	if (ref($map)) {
my $finishResource = $map->map_finish();	my $firstResource = $map->map_start();
	my $finishResource = $map->map_finish();
$args->{'iterator'} = $it = $navmap->getIterator($firstResource, $finishResource, $filterHash, $condition);	$args->{'iterator'} = $it = $navmap->getIterator($firstResource, $finishResource, $filterHash, $condition);
	} else {
	return;
	}
} else {	} else {
$args->{'iterator'} = $it = $navmap->getIterator(undef, undef, $filterHash, $condition,undef,$args->{'include_top_level_map'});	$args->{'iterator'} = $it = $navmap->getIterator(undef, undef, $filterHash, $condition,undef,$args->{'include_top_level_map'});
}	}
Line 1419 sub render {	Line 1586 sub render {
my $printKey = $args->{'printKey'};	my $printKey = $args->{'printKey'};
my $printCloseAll = $args->{'printCloseAll'};	my $printCloseAll = $args->{'printCloseAll'};
if (!defined($printCloseAll)) { $printCloseAll = 1; }	if (!defined($printCloseAll)) { $printCloseAll = 1; }

# Print key?	# Print key?
if ($printKey) {	if ($printKey) {
$result .= '<table border="0" cellpadding="2" cellspacing="0">';	$result .= '<table border="0" cellpadding="2" cellspacing="0">';
Line 1445 sub render {	Line 1612 sub render {
if ($printCloseAll && !$args->{'resource_no_folder_link'}) {	if ($printCloseAll && !$args->{'resource_no_folder_link'}) {
my ($link,$text);	my ($link,$text);
if ($condition) {	if ($condition) {
$link='"navmaps?condition=0&filter=&'.$queryString.	$link='navmaps?condition=0&filter=&'.$queryString.
'&here='.&escape($here).'"';	'&here='.&escape($here);
$text='Close all folders';	$text='Close all folders';
} else {	} else {
$link='"navmaps?condition=1&filter=&'.$queryString.	$link='navmaps?condition=1&filter=&'.$queryString.
'&here='.&escape($here).'"';	'&here='.&escape($here);
$text='Open all folders';	$text='Open all folders';
}	}
if ($args->{'caller'} eq 'navmapsdisplay') {	if ($args->{'caller'} eq 'navmapsdisplay') {
&add_linkitem($args->{'linkitems'},'changefolder',	unless ($args->{'notools'}) {
'location.href='.$link,$text);	&add_linkitem($args->{'linkitems'},'changefolder',
	"location.href='$link'",$text);
	}
} else {	} else {
$result.='<a href='.$link.'>'.&mt($text).'</a>';	$result.= '<a href="'.$link.'">'.&mt($text).'</a>';
}	}
$result .= "\n";	$result .= "\n";
}	}

# Check for any unread discussions in all resources.	# Check for any unread discussions in all resources.
if ($args->{'caller'} eq 'navmapsdisplay') {	if (($args->{'caller'} eq 'navmapsdisplay') && (!$args->{'notools'})) {
&add_linkitem($args->{'linkitems'},'clearbubbles',	&add_linkitem($args->{'linkitems'},'clearbubbles',
'document.clearbubbles.submit()',	'document.clearbubbles.submit()',
'Mark all posts read');	'Mark all posts read');
my $time=time;	my $time=time;
	my $querystr = &HTML::Entities::encode($ENV{'QUERY_STRING'},'<>&"');
$result .= (<<END);	$result .= (<<END);
<form name="clearbubbles" method="post" action="/adm/feedback">	<form name="clearbubbles" method="post" action="/adm/feedback">
<input type="hidden" name="navurl" value="$ENV{'QUERY_STRING'}" />	<input type="hidden" name="navurl" value="$querystr" />
<input type="hidden" name="navtime" value="$time" />	<input type="hidden" name="navtime" value="$time" />
END	END
if ($args->{'sort'} eq 'discussion') {	if ($args->{'sort'} eq 'discussion') {
Line 1493 END	Line 1663 END
}	}
$result.='</form>';	$result.='</form>';
}	}
	if (($args->{'caller'} eq 'navmapsdisplay') && ($env{'request.course.id'})) {
	my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
	my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
	if ($env{'course.'.$env{'request.course.id'}.'.url'} eq
	"uploaded/$cdom/$cnum/default.sequence") {
	if ((&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) \|\|
	(&Apache::lonnet::allowed('cev',$env{'request.course.id'}))) {
	&add_linkitem($args->{'linkitems'},'edittoplevel',
	"javascript:gocmd('/adm/coursedocs','editdocs');",
	'Content Editor');
	}
	if ($counter) {
	&add_linkitem($args->{'linkitems'},'printout',
	"javascript:gopost('/adm/printout','/adm/navmaps');",
	'Prepare a printable document');
	}
	}
	}

if ($args->{'caller'} eq 'navmapsdisplay') {	if ($args->{'caller'} eq 'navmapsdisplay') {
$result .= '<table><tr><td>'.	$result .= &show_linkitems_toolbar($args,$condition);
&Apache::loncommon::help_open_menu('Navigation Screen','Navigation_Screen',undef,'RAT').'</td>';
if ($env{'environment.remotenavmap'} ne 'on') {
$result .= '<td> </td>';
} else {
$result .= '</tr><tr>';
}
$result.=&show_linkitems($args->{'linkitems'});
if ($args->{'sort_html'}) {
if ($env{'environment.remotenavmap'} ne 'on') {
$result.='<td> </td><td> </td><td> </td>'.
'<td align="right">'.$args->{'sort_html'}.'</td></tr>';
} else {
$result.='</tr><tr><td align="left"><br />'.
$args->{'sort_html'}.'</td></tr>';
}
}
$result .= '</table>';
} elsif ($args->{'sort_html'}) {	} elsif ($args->{'sort_html'}) {
$result.=$args->{'sort_html'};	$result.=$args->{'sort_html'};
}	}

$result .= "<br />\n";	#$result .= "<br />\n";
if ($r) {	if ($r) {
$r->print($result);	$r->print($result);
$r->rflush();	$r->rflush();
$result = "";	$result = "";
}	}
# End parameter setting	# End parameter setting

	$result .= "<br />\n";

# Data	# Data
$result .= '<table cellspacing="0" cellpadding="3" border="0" bgcolor="#FFFFFF">' ."\n";	$result.=&Apache::loncommon::start_data_table("LC_tableOfContent");

my $res = "Apache::lonnavmaps::resource";	my $res = "Apache::lonnavmaps::resource";
my %condenseStatuses =	my %condenseStatuses =
( $res->NETWORK_FAILURE => 1,	( $res->NETWORK_FAILURE => 1,
$res->NOTHING_SET => 1,	$res->NOTHING_SET => 1,
$res->CORRECT => 1 );	$res->CORRECT => 1 );
my @backgroundColors = ("#FFFFFF", "#F6F6F6");

# Shared variables	# Shared variables
$args->{'counter'} = 0; # counts the rows	$args->{'counter'} = 0; # counts the rows
$args->{'indentLevel'} = 0;	$args->{'indentLevel'} = 0;
$args->{'isNewBranch'} = 0;	$args->{'isNewBranch'} = 0;
$args->{'condensed'} = 0;	$args->{'condensed'} = 0;
my $location=
&Apache::loncommon::lonhttpdurl("/adm/lonIcons/whitespace1.gif");	my $location = &Apache::loncommon::lonhttpdurl("/adm/lonIcons/whitespace_21.gif");
$args->{'indentString'} = setDefault($args->{'indentString'}, "<img src='$location' width='25' height='1' alt='  ' border='0' />");	$args->{'indentString'} = setDefault($args->{'indentString'}, "<img src='$location' alt='' />");
$args->{'displayedHereMarker'} = 0;	$args->{'displayedHereMarker'} = 0;

# If we're suppressing empty sequences, look for them here. Use DFS for speed,	# If we're suppressing empty sequences, look for them here.
# since structure actually doesn't matter, except what map has what resources.	# We also do this even if $args->{'suppressEmptySequences'}
if ($args->{'suppressEmptySequences'}) {	# is not true, so we can hide empty sequences for which the
my $dfsit = Apache::lonnavmaps::DFSiterator->new($navmap,	# hiddenresource parameter is set to yes (at map level), or
$it->{FIRST_RESOURCE},	# mark as hidden for users who have $userCanSeeHidden.
$it->{FINISH_RESOURCE},	# Use DFS for speed, since structure actually doesn't matter,
{}, undef, 1);	# except what map has what resources.
my $depth = 0;	#
$dfsit->next();	# To ensure the "Selected Resources from selected folder in course"
my $curRes = $dfsit->next();	# printout generation option will work in sessions launched via a
while ($depth > -1) {	# deep link, the value of $args->{'filterFunc'} included in the
if ($curRes == $dfsit->BEGIN_MAP()) { $depth++; }	# call to lonnavmaps::render() is omitted from the filter function
if ($curRes == $dfsit->END_MAP()) { $depth--; }	# used with the DFS Iterator when $args->{'caller'} is 'printout'.
	#
if (ref($curRes)) {	# As a result $sequence->{DATA}->{HAS_VISIBLE_CHILDREN} can be
# Parallel pre-processing: Do sequences have non-filtered-out children?	# set to 1 for folder(s) which include resources only accessible
if ($curRes->is_map()) {	# for sessions launched via a deep link, when the current session
$curRes->{DATA}->{HAS_VISIBLE_CHILDREN} = 0;	# is of that type.
# Sequences themselves do not count as visible children,
# unless those sequences also have visible children.	my $dfsit = Apache::lonnavmaps::DFSiterator->new($navmap,
# This means if a sequence appears, there's a "promise"	$it->{FIRST_RESOURCE},
# that there's something under it if you open it, somewhere.	$it->{FINISH_RESOURCE},
} else {	{}, undef, 1);
# Not a sequence: if it's filtered, ignore it, otherwise	my $dfsFilterFunc;
# rise up the stack and mark the sequences as having children	if ($args->{'caller'} eq 'printout') {
if (&$filterFunc($curRes)) {	$dfsFilterFunc = sub { my $res = shift; return !$res->randomout() &&
for my $sequence (@{$dfsit->getStack()}) {	($res->deeplink($args->{'caller'}) ne 'absent') &&
$sequence->{DATA}->{HAS_VISIBLE_CHILDREN} = 1;	($res->deeplink($args->{'caller'}) ne 'grades') &&
}	!$res->deeplinkout();};
	} else {
	$dfsFilterFunc = $filterFunc;
	}
	my $depth = 0;
	$dfsit->next();
	my $curRes = $dfsit->next();
	while ($depth > -1) {
	if ($curRes == $dfsit->BEGIN_MAP()) { $depth++; }
	if ($curRes == $dfsit->END_MAP()) { $depth--; }

	if (ref($curRes)) {
	# Parallel pre-processing: Do sequences have non-filtered-out children?
	if ($curRes->is_map()) {
	$curRes->{DATA}->{HAS_VISIBLE_CHILDREN} = 0;
	# Sequences themselves do not count as visible children,
	# unless those sequences also have visible children.
	# This means if a sequence appears, there's a "promise"
	# that there's something under it if you open it, somewhere.
	} elsif ($curRes->src()) {
	# Not a sequence: if it's filtered, ignore it, otherwise
	# rise up the stack and mark the sequences as having children
	if (&$dfsFilterFunc($curRes)) {
	for my $sequence (@{$dfsit->getStack()}) {
	next unless ($sequence->is_map());
	$sequence->{DATA}->{HAS_VISIBLE_CHILDREN} = 1;
}	}
}	}
}	}
} continue {
$curRes = $dfsit->next();
}	}
	} continue {
	$curRes = $dfsit->next();
}	}

my $displayedJumpMarker = 0;	my $displayedJumpMarker = 0;
Line 1636 END	Line 1834 END
undef($args->{'sort'});	undef($args->{'sort'});
}	}

	# Determine if page will be served with https in case
	# it contains a syllabus which uses an external URL
	# which points at an http site.

	my ($is_ssl,$cdom,$cnum,$hostname);
	if ($ENV{'SERVER_PORT'} == 443) {
	$is_ssl = 1;
	if ($r) {
	$hostname = $r->hostname();
	} else {
	$hostname = $ENV{'SERVER_NAME'};
	}
	}
	if ($env{'request.course.id'}) {
	$cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
	$cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
	}

	my $inhibitmenu;
	if ($args->{'modalLink'}) {
	$inhibitmenu = '&inhibitmenu=yes';
	}

while (1) {	while (1) {
if ($args->{'sort'}) {	if ($args->{'sort'}) {
Line 1671 END	Line 1891 END
}	}

# If this is an empty sequence and we're filtering them, continue on	# If this is an empty sequence and we're filtering them, continue on
if ($curRes->is_map() && $args->{'suppressEmptySequences'} &&	$args->{'mapHidden'} = 0;
!$curRes->{DATA}->{HAS_VISIBLE_CHILDREN}) {	$args->{'mapUnlisted'} = 0;
next;	$args->{'mapHiddenDeepLink'} = 0;
	if (($curRes->is_map()) && (!$curRes->{DATA}->{HAS_VISIBLE_CHILDREN})) {
	if ($args->{'suppressEmptySequences'}) {
	next;
	} else {
	my $mapname = &Apache::lonnet::declutter($curRes->src());
	$mapname = &Apache::lonnet::deversion($mapname);
	if (lc($navmap->get_mapparam(undef,$mapname,"0.hiddenresource")) eq 'yes') {
	if ($userCanSeeHidden) {
	$args->{'mapHidden'} = 1;
	} else {
	next;
	}
	} elsif ($curRes->deeplinkout) {
	if ($userCanSeeHidden) {
	$args->{'mapHiddenDeepLink'} = 1;
	} else {
	next;
	}
	} else {
	my $deeplink = $navmap->get_mapparam(undef,$mapname,"0.deeplink");
	my ($state,$others,$listed) = split(/,/,$deeplink);
	if (($listed eq 'absent') \|\| ($listed eq 'grades')) {
	if ($userCanSeeHidden) {
	$args->{'mapUnlisted'} = 1;
	} else {
	next;
	}
	}
	}
	}
}	}

# If we're suppressing navmaps and this is a navmap, continue on	# If we're suppressing navmaps and this is a navmap, continue on
Line 1734 END	Line 1984 END
$args->{'condensed'} = 1;	$args->{'condensed'} = 1;
}	}
}	}
}	}
	# If deep-link parameter is set (and is not set to full) suppress link
	# unless privileged user, tinyurl used for login resolved to a map, and
	# the resource is within the map.
	if ((!$curRes->deeplink($args->{'caller'})) \|\|
	($curRes->deeplink($args->{'caller'}) eq 'full') \|\| &advancedUser()) {
	$args->{'resource_nolink'} = 0;
	} else {
	$args->{'resource_nolink'} = 1;
	}

# If the multipart problem was condensed, "forget" it was multipart	# If the multipart problem was condensed, "forget" it was multipart
if (scalar(@parts) == 1) {	if (scalar(@parts) == 1) {
$args->{'multipart'} = 0;	$args->{'multipart'} = 0;
Line 1757 END	Line 2016 END
$stack=$it->getStack();	$stack=$it->getStack();
}	}
($src,$symb,$anchor)=getLinkForResource($stack);	($src,$symb,$anchor)=getLinkForResource($stack);
	my $srcHasQuestion = $src =~ /\?/;
	if ($env{'request.course.id'}) {
	if (($is_ssl) && ($src =~ m{^\Q/public/$cdom/$cnum/syllabus\E($\|\?)}) &&
	($env{'course.'.$env{'request.course.id'}.'.externalsyllabus'} =~ m{^http://})) {
	unless ((&Apache::lonnet::uses_sts()) \|\| (&Apache::lonnet::waf_allssl($hostname))) {
	if ($hostname ne '') {
	$src = 'http://'.$hostname.$src;
	}
	$src .= ($srcHasQuestion? '&' : '?') . 'usehttp=1';
	$srcHasQuestion = 1;
	}
	} elsif (($is_ssl) && ($src =~ m{^\Q/adm/wrapper/ext/\E(?!https:)})) {
	unless ((&Apache::lonnet::uses_sts()) \|\| (&Apache::lonnet::waf_allssl($hostname))) {
	if ($hostname ne '') {
	$src = 'http://'.$hostname.$src;
	}
	$src .= ($srcHasQuestion? '&' : '?') . 'usehttp=1';
	$srcHasQuestion = 1;
	}
	}
	}
if (defined($anchor)) { $anchor='#'.$anchor; }	if (defined($anchor)) { $anchor='#'.$anchor; }
my $srcHasQuestion = $src =~ /\?/;	if (($args->{'caller'} eq 'sequence') && ($curRes->is_map())) {
$args->{"resourceLink"} = $src.	$args->{"resourceLink"} = $src.($srcHasQuestion?'&':'?') .'navmap=1';
($srcHasQuestion?'&':'?') .	} else {
'symb=' . &escape($symb).$anchor;	$args->{"resourceLink"} = $src.
	($srcHasQuestion?'&':'?') .
	'symb=' . &escape($symb).$inhibitmenu.$anchor;
	}
}	}
# Now, we've decided what parts to show. Loop through them and	# Now, we've decided what parts to show. Loop through them and
# show them.	# show them.
foreach my $part (@parts) {	foreach my $part (@parts) {
$rownum ++;	$rownum ++;
my $backgroundColor = $backgroundColors[$rownum % scalar(@backgroundColors)];

$result .= " <tr bgcolor='$backgroundColor'>\n";	$result .= &Apache::loncommon::start_data_table_row();

# Set up some data about the parts that the cols might want	# Set up some data about the parts that the cols might want
my $filter = $it->{FILTER};	my $filter = $it->{FILTER};
Line 1790 END	Line 2072 END
$currentJumpDelta) {	$currentJumpDelta) {
# Jam the anchor after the <td> tag;	# Jam the anchor after the <td> tag;
# necessary for valid HTML (which Mozilla requires)	# necessary for valid HTML (which Mozilla requires)
$colHTML =~ s/\>/\>\<a name="curloc" \/\>/;	$colHTML =~ s/\>/\>\<a name="curloc" \>\<\/a\>/;
$displayedJumpMarker = 1;	$displayedJumpMarker = 1;
}	}
$result .= $colHTML . "\n";	$result .= $colHTML . "\n";
}	}
$result .= " </tr>\n";	$result .= &Apache::loncommon::end_data_table_row();
$args->{'isNewBranch'} = 0;	$args->{'isNewBranch'} = 0;
}	}

Line 1814 END	Line 2096 END
}	}
}	}
}	}

	$result.=&Apache::loncommon::end_data_table();

# Print out the part that jumps to #curloc if it exists	# Print out the part that jumps to #curloc if it exists
# delay needed because the browser is processing the jump before	# delay needed because the browser is processing the jump before
Line 1823 END	Line 2107 END
# it's quite likely this might fix other browsers, too, and	# it's quite likely this might fix other browsers, too, and
# certainly won't hurt anything.	# certainly won't hurt anything.
if ($displayedJumpMarker) {	if ($displayedJumpMarker) {
$result .= "	$result .= &Apache::lonhtmlcommon::scripttag("
<script>
if (location.href.indexOf('#curloc')==-1) {	if (location.href.indexOf('#curloc')==-1) {
setTimeout(\"location += '#curloc';\", 0)	setTimeout(\"location += '#curloc';\", 0)
}	}
</script>";	");
}	}

$result .= "</table>";

if ($r) {	if ($r) {
$r->print($result);	$r->print($result);
$result = "";	$result = "";
Line 1848 sub add_linkitem {	Line 2129 sub add_linkitem {
$$linkitems{$name}{'text'}=&mt($text);	$$linkitems{$name}{'text'}=&mt($text);
}	}

sub show_linkitems {	sub show_linkitems_toolbar {
my ($linkitems)=@_;	my ($args,$condition) = @_;
my @linkorder = ("blank","launchnav","closenav","firsthomework",	my $result;
"everything","uncompleted","changefolder","clearbubbles");	if (ref($args) eq 'HASH') {
	if (ref($args->{'linkitems'}) eq 'HASH') {
my $result .= (<<ENDBLOCK);	my $numlinks = scalar(keys(%{$args->{'linkitems'}}));
<td align="left">	if ($numlinks > 1) {
<script type="text/javascript">	$result = '<td>'.
function changeNavDisplay () {	&Apache::loncommon::help_open_menu('Navigation Screen','Navigation_Screen',
var navchoice = document.linkitems.toplink[document.linkitems.toplink.selectedIndex].value;	undef,'RAT').
ENDBLOCK	'</td>'.
foreach my $link (@linkorder) {	'<td> </td>'.
$result.= "if (navchoice == '$link') {".	'<td class="LC_middle">'.&mt('Tools:').'</td>';
$linkitems->{$link}{'cmd'}."}\n";	}
}	$result .= '<td align="left">'."\n".
$result.='}	'<ul id="LC_toolbar">';
</script>	my @linkorder = ('firsthomework','everything','uncompleted',
<form name="linkitems" method="post">	'changefolder','clearbubbles','printout','edittoplevel');
<span class="LC_nobreak"><select name="toplink">'."\n";	foreach my $link (@linkorder) {
foreach my $link (@linkorder) {	if (ref($args->{'linkitems'}{$link}) eq 'HASH') {
if (defined($linkitems->{$link})) {	if ($args->{'linkitems'}{$link}{'text'} ne '') {
if ($linkitems->{$link}{'text'} ne '') {	$args->{'linkitems'}{$link}{'cmd'}=~s/"/'/g;
$result .= ' <option value="'.$link.'">'.	if ($args->{'linkitems'}{$link}{'cmd'}) {
$linkitems->{$link}{'text'}."</option>\n";	my $link_id = 'LC_content_toolbar_'.$link;
}	if ($link eq 'changefolder') {
}	if ($condition) {
	$link_id='LC_content_toolbar_changefolder_toggled';
	} else {
	$link_id='LC_content_toolbar_changefolder';
	}
	}
	$result .= '<li><a href="#" '.
	'onclick="'.$args->{'linkitems'}{$link}{'cmd'}.'" '.
	'id="'.$link_id.'" '.
	'class="LC_toolbarItem" '.
	'title="'.$args->{'linkitems'}{$link}{'text'}.'">'.
	'</a></li>'."\n";
	}
	}
	}
	}
	$result .= '</ul>'.
	'</td>';
	if (($numlinks==1) && (exists($args->{'linkitems'}{'edittoplevel'}))) {
	$result .= '<td><a href="'.$args->{'linkitems'}{'edittoplevel'}{'cmd'}.'">'.
	&mt('Content Editor').'</a></td>';
	}
	}
	if ($args->{'sort_html'}) {
	$result .= '<td> </td><td> </td><td> </td>'.
	'<td align="right">'.$args->{'sort_html'}.'</td>';
	}
	}
	if ($result) {
	$result = "<table><tr>$result</tr></table>";
}	}
$result .= '</select> <input type="button" name="chgnav"
value="Go" onClick="javascript:changeNavDisplay()" />
</span></form></td>'."\n";

return $result;	return $result;
}	}

Line 1968 sub new {	Line 2274 sub new {
my $proto = shift;	my $proto = shift;
my $class = ref($proto) \|\| $proto;	my $class = ref($proto) \|\| $proto;
my $self = {};	my $self = {};
	bless($self); # So we can call change_user if necessary

	$self->{USERNAME} = shift \|\| $env{'user.name'};
	$self->{DOMAIN} = shift \|\| $env{'user.domain'};
	$self->{CODE} = shift;
	$self->{NOHIDE} = shift;



# Resource cache stores navmap resources as we reference them. We generate	# Resource cache stores navmap resources as we reference them. We generate
# them on-demand so we don't pay for creating resources unless we use them.	# them on-demand so we don't pay for creating resources unless we use them.
Line 1977 sub new {	Line 2291 sub new {
# failed	# failed
$self->{NETWORK_FAILURE} = 0;	$self->{NETWORK_FAILURE} = 0;

# tie the nav hash	# We can only tie the nav hash as done below if the username/domain
	# match the env one. Otherwise change_user does everything we need...since we can't
	# assume there are course hashes for the specific requested user:domain
	# Note: change_user is also called if we need the nav hash when printing CODEd
	# assignments or printing an exam, in which the enclosing folder for the items in
	# the exam has hidden set.
	#

my %navmaphash;	if (($self->{USERNAME} eq $env{'user.name'}) && ($self->{DOMAIN} eq $env{'user.domain'}) &&
my %parmhash;	!$self->{CODE} && !$self->{NOHIDE}) {
my $courseFn = $env{"request.course.fn"};
if (!(tie(%navmaphash, 'GDBM_File', "${courseFn}.db",	# tie the nav hash
&GDBM_READER(), 0640))) {
return undef;	my %navmaphash;
	my %parmhash;
	my $courseFn = $env{"request.course.fn"};
	if (!(tie(%navmaphash, 'GDBM_File', "${courseFn}.db",
	&GDBM_READER(), 0640))) {
	return undef;
	}

	if (!(tie(%parmhash, 'GDBM_File', "${courseFn}_parms.db",
	&GDBM_READER(), 0640)))
	{
	untie %{$self->{PARM_HASH}};
	return undef;
	}

	$self->{NAV_HASH} = \%navmaphash;
	$self->{PARM_HASH} = \%parmhash;
	$self->{PARM_CACHE} = {};
	} else {
	$self->change_user($self->{USERNAME}, $self->{DOMAIN}, $self->{CODE}, $self->{NOHIDE});
}	}

	return $self;
	}

	#
	# In some instances it is useful to be able to dynamically change the
	# username/domain associated with a navmap (e.g. to navigate for someone
	# else besides the current user...if sufficiently privileged.
	# Parameters:
	# user - New user.
	# domain- Domain the user belongs to.
	# code - Anonymous CODE in use.
	# Implicit inputs:
	#
	sub change_user {
	my $self = shift;
	$self->{USERNAME} = shift;
	$self->{DOMAIN} = shift;
	$self->{CODE} = shift;
	$self->{NOHIDE} = shift;

	# If the hashes are already tied make sure to break that bond:

	untie %{$self->{NAV_HASH}};
	untie %{$self->{PARM_HASH}};

	# The assumption is that we have to
	# use lonmap here to re-read the hash and from it reconstruct
	# new big and parameter hashes. An implicit assumption at this time
	# is that the course file is probably not created locally yet
	# an that we will therefore just read without tying.

	my ($cdom, $cnum) = split(/\_/, $env{'request.course.id'});

	my %big_hash;
	&Apache::lonmap::loadmap($cnum, $cdom, $self->{USERNAME}, $self->{DOMAIN}, $self->{CODE}, $self->{NOHIDE}, \%big_hash);
	$self->{NAV_HASH} = \%big_hash;



	# Now clear the parm cache and reconstruct the parm hash from the big_hash
	# param.xxxx keys.

	$self->{PARM_CACHE} = {};

if (!(tie(%parmhash, 'GDBM_File', "${courseFn}_parms.db",	my %parm_hash = {};
&GDBM_READER(), 0640)))	foreach my $key (keys(%big_hash)) {
{	if ($key =~ /^param\./) {
untie %{$self->{PARM_HASH}};	my $param_key = $key;
return undef;	$param_key =~ s/^param\.//;
	$parm_hash{$param_key} = $big_hash{$key};
	}
}	}

$self->{NAV_HASH} = \%navmaphash;	$self->{PARM_HASH} = \%parm_hash;
$self->{PARM_HASH} = \%parmhash;
$self->{PARM_CACHE} = {};

bless($self);

return $self;
}	}

sub generate_course_user_opt {	sub generate_course_user_opt {
my $self = shift;	my $self = shift;
if ($self->{COURSE_USER_OPT_GENERATED}) { return; }	if ($self->{COURSE_USER_OPT_GENERATED}) { return; }

my $uname=$env{'user.name'};	my $uname=$self->{USERNAME};
my $udom=$env{'user.domain'};	my $udom=$self->{DOMAIN};

my $cid=$env{'request.course.id'};	my $cid=$env{'request.course.id'};
my $cdom=$env{'course.'.$cid.'.domain'};	my $cdom=$env{'course.'.$cid.'.domain'};
my $cnum=$env{'course.'.$cid.'.num'};	my $cnum=$env{'course.'.$cid.'.num'};
Line 2042 sub generate_course_user_opt {	Line 2423 sub generate_course_user_opt {
return;	return;
}	}



sub generate_email_discuss_status {	sub generate_email_discuss_status {
my $self = shift;	my $self = shift;
my $symb = shift;	my $symb = shift;
Line 2051 sub generate_email_discuss_status {	Line 2434 sub generate_email_discuss_status {
my $cdom=$env{'course.'.$cid.'.domain'};	my $cdom=$env{'course.'.$cid.'.domain'};
my $cnum=$env{'course.'.$cid.'.num'};	my $cnum=$env{'course.'.$cid.'.num'};

my %emailstatus = &Apache::lonnet::dump('email_status');	my %emailstatus = &Apache::lonnet::dump('email_status',$self->{DOMAIN},$self->{USERNAME});
my $logoutTime = $emailstatus{'logout'};	my $logoutTime = $emailstatus{'logout'};
my $courseLeaveTime = $emailstatus{'logout_'.$env{'request.course.id'}};	my $courseLeaveTime = $emailstatus{'logout_'.$env{'request.course.id'}};
$self->{LAST_CHECK} = (($courseLeaveTime > $logoutTime) ?	$self->{LAST_CHECK} = (($courseLeaveTime > $logoutTime) ?
Line 2059 sub generate_email_discuss_status {	Line 2442 sub generate_email_discuss_status {
my %discussiontime = &Apache::lonnet::dump('discussiontimes',	my %discussiontime = &Apache::lonnet::dump('discussiontimes',
$cdom, $cnum);	$cdom, $cnum);
my %lastread = &Apache::lonnet::dump('nohist_'.$cid.'_discuss',	my %lastread = &Apache::lonnet::dump('nohist_'.$cid.'_discuss',
$env{'user.domain'},$env{'user.name'},'lastread');	$self->{DOMAIN},$self->{USERNAME},'lastread');
my %lastreadtime = ();	my %lastreadtime = ();
foreach my $key (keys %lastread) {	foreach my $key (keys(%lastread)) {
my $shortkey = $key;	my $shortkey = $key;
$shortkey =~ s/_lastread$//;	$shortkey =~ s/_lastread$//;
$lastreadtime{$shortkey} = $lastread{$key};	$lastreadtime{$shortkey} = $lastread{$key};
Line 2069 sub generate_email_discuss_status {	Line 2452 sub generate_email_discuss_status {

my %feedback=();	my %feedback=();
my %error=();	my %error=();
my @keys = &Apache::lonnet::getkeys('nohist_email',$env{'user.domain'},	my @keys = &Apache::lonnet::getkeys('nohist_email',$self->{DOMAIN},
$env{'user.name'});	$self->{USERNAME});

foreach my $msgid (@keys) {	foreach my $msgid (@keys) {
if ((!$emailstatus{$msgid}) \|\| ($emailstatus{$msgid} eq 'new')) {	if ((!$emailstatus{$msgid}) \|\| ($emailstatus{$msgid} eq 'new')) {
my ($sendtime,$shortsubj,$fromname,$fromdomain,$status,$fromcid,	my ($sendtime,$shortsubj,$fromname,$fromdomain,$status,$fromcid,
$symb,$error) = &Apache::lonmsg::unpackmsgid($msgid);	$symb,$error) = &Apache::lonmsg::unpackmsgid(&LONCAPA::escape($msgid));
&Apache::lonenc::check_decrypt(\$symb);	&Apache::lonenc::check_decrypt(\$symb);
if (($fromcid ne '') && ($fromcid ne $cid)) {	if (($fromcid ne '') && ($fromcid ne $cid)) {
next;	next;
Line 2118 sub get_user_data {	Line 2501 sub get_user_data {

# Retrieve performance data on problems	# Retrieve performance data on problems
my %student_data = Apache::lonnet::currentdump($env{'request.course.id'},	my %student_data = Apache::lonnet::currentdump($env{'request.course.id'},
$env{'user.domain'},	$self->{DOMAIN},
$env{'user.name'});	$self->{USERNAME});
$self->{STUDENT_DATA} = \%student_data;	$self->{STUDENT_DATA} = \%student_data;

$self->{RETRIEVED_USER_DATA} = 1;	$self->{RETRIEVED_USER_DATA} = 1;
Line 2176 sub getIterator {	Line 2559 sub getIterator {
my $self = shift;	my $self = shift;
my $iterator = Apache::lonnavmaps::iterator->new($self, shift, shift,	my $iterator = Apache::lonnavmaps::iterator->new($self, shift, shift,
shift, undef, shift,	shift, undef, shift,
shift, shift);	shift, shift, shift);
return $iterator;	return $iterator;
}	}

Line 2348 resource object.	Line 2731 resource object.
Based on the symb of the resource, get a resource object for that	Based on the symb of the resource, get a resource object for that
resource. This is one of the proper ways to get a resource object.	resource. This is one of the proper ways to get a resource object.

=item * B<getMapByMapPc>(map_pc):	=item * B<getByMapPc>(map_pc):

Based on the map_pc of the resource, get a resource object for	Based on the map_pc of the resource, get a resource object for
the given map. This is one of the proper ways to get a resource object.	the given map. This is one of the proper ways to get a resource object.
Line 2433 sub parmval {	Line 2816 sub parmval {
my $self = shift;	my $self = shift;
my ($what,$symb,$recurse)=@_;	my ($what,$symb,$recurse)=@_;
my $hashkey = $what."\|\|\|".$symb;	my $hashkey = $what."\|\|\|".$symb;
	my $cache = $self->{PARM_CACHE};
if (defined($self->{PARM_CACHE}->{$hashkey})) {	if (defined($self->{PARM_CACHE}->{$hashkey})) {
if (ref($self->{PARM_CACHE}->{$hashkey}) eq 'ARRAY') {	if (ref($self->{PARM_CACHE}->{$hashkey}) eq 'ARRAY') {
if (defined($self->{PARM_CACHE}->{$hashkey}->[0])) {	if (defined($self->{PARM_CACHE}->{$hashkey}->[0])) {
Line 2447 sub parmval {	Line 2830 sub parmval {
return $self->{PARM_CACHE}->{$hashkey};	return $self->{PARM_CACHE}->{$hashkey};
}	}
}	}

my $result = $self->parmval_real($what, $symb, $recurse);	my $result = $self->parmval_real($what, $symb, $recurse);
$self->{PARM_CACHE}->{$hashkey} = $result;	$self->{PARM_CACHE}->{$hashkey} = $result;
if (wantarray) {	if (wantarray) {
Line 2455 sub parmval {	Line 2839 sub parmval {
return $result->[0];	return $result->[0];
}	}


sub parmval_real {	sub parmval_real {
my $self = shift;	my $self = shift;
my ($what,$symb,$recurse) = @_;	my ($what,$symb,$recurse) = @_;


# Make sure the {USER_OPT} and {COURSE_OPT} hashes are populated	# Make sure the {USER_OPT} and {COURSE_OPT} hashes are populated
$self->generate_course_user_opt();	$self->generate_course_user_opt();

Line 2470 sub parmval_real {	Line 2856 sub parmval_real {
@cgrps = sort(@cgrps);	@cgrps = sort(@cgrps);
$cgroup = $cgrps[0];	$cgroup = $cgrps[0];
}	}
my $uname=$env{'user.name'};	my $uname=$self->{USERNAME};
my $udom=$env{'user.domain'};	my $udom=$self->{DOMAIN};

unless ($symb) { return ['']; }	unless ($symb) { return ['']; }
my $result='';	my $result='';

my ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);	my ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
$mapname = &Apache::lonnet::deversion($mapname);	$mapname = &Apache::lonnet::deversion($mapname);
	my $toolsymb = '';
	if ($fn =~ /ext\.tool$/) {
	$toolsymb = $symb;
	}
	my ($recursed,@recurseup);

# ----------------------------------------------------- Cascading lookup scheme	# ----------------------------------------------------- Cascading lookup scheme
my $rwhat=$what;	my $rwhat=$what;
$what=~s/^parameter\_//;	$what=~s/^parameter\_//;
$what=~s/\_/\./;	$what=~s/\_/\./;

my $symbparm=$symb.'.'.$what;	my $symbparm=$symb.'.'.$what;
	my $recurseparm=$mapname.'___(rec).'.$what;
my $mapparm=$mapname.'___(all).'.$what;	my $mapparm=$mapname.'___(all).'.$what;
my $usercourseprefix=$cid;	my $usercourseprefix=$cid;



my $grplevel=$usercourseprefix.'.['.$cgroup.'].'.$what;	my $grplevel=$usercourseprefix.'.['.$cgroup.'].'.$what;
my $grplevelr=$usercourseprefix.'.['.$cgroup.'].'.$symbparm;	my $grplevelr=$usercourseprefix.'.['.$cgroup.'].'.$symbparm;
	my $grpleveli=$usercourseprefix.'.['.$cgroup.'].'.$recurseparm;
my $grplevelm=$usercourseprefix.'.['.$cgroup.'].'.$mapparm;	my $grplevelm=$usercourseprefix.'.['.$cgroup.'].'.$mapparm;


my $seclevel= $usercourseprefix.'.['.$csec.'].'.$what;	my $seclevel= $usercourseprefix.'.['.$csec.'].'.$what;
my $seclevelr=$usercourseprefix.'.['.$csec.'].'.$symbparm;	my $seclevelr=$usercourseprefix.'.['.$csec.'].'.$symbparm;
	my $secleveli=$usercourseprefix.'.['.$csec.'].'.$recurseparm;
my $seclevelm=$usercourseprefix.'.['.$csec.'].'.$mapparm;	my $seclevelm=$usercourseprefix.'.['.$csec.'].'.$mapparm;


my $courselevel= $usercourseprefix.'.'.$what;	my $courselevel= $usercourseprefix.'.'.$what;
my $courselevelr=$usercourseprefix.'.'.$symbparm;	my $courselevelr=$usercourseprefix.'.'.$symbparm;
	my $courseleveli=$usercourseprefix.'.'.$recurseparm;
my $courselevelm=$usercourseprefix.'.'.$mapparm;	my $courselevelm=$usercourseprefix.'.'.$mapparm;


my $useropt = $self->{USER_OPT};	my $useropt = $self->{USER_OPT};
my $courseopt = $self->{COURSE_OPT};	my $courseopt = $self->{COURSE_OPT};
my $parmhash = $self->{PARM_HASH};	my $parmhash = $self->{PARM_HASH};
Line 2507 sub parmval_real {	Line 2908 sub parmval_real {
if ($uname and defined($useropt)) {	if ($uname and defined($useropt)) {
if (defined($$useropt{$courselevelr})) { return [$$useropt{$courselevelr},'resource']; }	if (defined($$useropt{$courselevelr})) { return [$$useropt{$courselevelr},'resource']; }
if (defined($$useropt{$courselevelm})) { return [$$useropt{$courselevelm},'map']; }	if (defined($$useropt{$courselevelm})) { return [$$useropt{$courselevelm},'map']; }
	if (defined($$useropt{$courseleveli})) { return [$$useropt{$courseleveli},'map']; }
	unless ($recursed) {
	@recurseup = $self->recurseup_maps($mapname);
	$recursed = 1;
	}
	foreach my $item (@recurseup) {
	my $norecursechk=$usercourseprefix.'.'.$item.'___(all).'.$what;
	if (defined($$useropt{$norecursechk})) {
	if ($what =~ /\.(encrypturl\|hiddenresource)$/) {
	return [$$useropt{$norecursechk},'map'];
	} else {
	last;
	}
	}
	my $recursechk=$usercourseprefix.'.'.$item.'___(rec).'.$what;
	if (defined($$useropt{$recursechk})) { return [$$useropt{$recursechk},'map']; }
	}
if (defined($$useropt{$courselevel})) { return [$$useropt{$courselevel},'course']; }	if (defined($$useropt{$courselevel})) { return [$$useropt{$courselevel},'course']; }
}	}

Line 2514 sub parmval_real {	Line 2932 sub parmval_real {
if ($cgroup ne '' and defined($courseopt)) {	if ($cgroup ne '' and defined($courseopt)) {
if (defined($$courseopt{$grplevelr})) { return [$$courseopt{$grplevelr},'resource']; }	if (defined($$courseopt{$grplevelr})) { return [$$courseopt{$grplevelr},'resource']; }
if (defined($$courseopt{$grplevelm})) { return [$$courseopt{$grplevelm},'map']; }	if (defined($$courseopt{$grplevelm})) { return [$$courseopt{$grplevelm},'map']; }
	if (defined($$courseopt{$grpleveli})) { return [$$courseopt{$grpleveli},'map']; }
	unless ($recursed) {
	@recurseup = $self->recurseup_maps($mapname);
	$recursed = 1;
	}
	foreach my $item (@recurseup) {
	my $norecursechk=$usercourseprefix.'.['.$cgroup.'].'.$item.'___(all).'.$what;
	if (defined($$courseopt{$norecursechk})) {
	if ($what =~ /\.(encrypturl\|hiddenresource)$/) {
	return [$$courseopt{$norecursechk},'map'];
	} else {
	last;
	}
	}
	my $recursechk=$usercourseprefix.'.['.$cgroup.'].'.$item.'___(rec).'.$what;
	if (defined($$courseopt{$recursechk})) { return [$$courseopt{$recursechk},'map']; }
	}
if (defined($$courseopt{$grplevel})) { return [$$courseopt{$grplevel},'course']; }	if (defined($$courseopt{$grplevel})) { return [$$courseopt{$grplevel},'course']; }
}	}

if ($csec and defined($courseopt)) {	if ($csec ne '' and defined($courseopt)) {
if (defined($$courseopt{$seclevelr})) { return [$$courseopt{$seclevelr},'resource']; }	if (defined($$courseopt{$seclevelr})) { return [$$courseopt{$seclevelr},'resource']; }
if (defined($$courseopt{$seclevelm})) { return [$$courseopt{$seclevelm},'map']; }	if (defined($$courseopt{$seclevelm})) { return [$$courseopt{$seclevelm},'map']; }
	if (defined($$courseopt{$secleveli})) { return [$$courseopt{$secleveli},'map']; }
	unless ($recursed) {
	@recurseup = $self->recurseup_maps($mapname);
	$recursed = 1;
	}
	foreach my $item (@recurseup) {
	my $norecursechk=$usercourseprefix.'.['.$csec.'].'.$item.'___(all).'.$what;
	if (defined($$courseopt{$norecursechk})) {
	if ($what =~ /\.(encrypturl\|hiddenresource)$/) {
	return [$$courseopt{$norecursechk},'map'];
	} else {
	last;
	}
	}
	my $recursechk=$usercourseprefix.'.['.$csec.'].'.$item.'___(rec).'.$what;
	if (defined($$courseopt{$recursechk})) { return [$$courseopt{$recursechk},'map']; }
	}
if (defined($$courseopt{$seclevel})) { return [$$courseopt{$seclevel},'course']; }	if (defined($$courseopt{$seclevel})) { return [$$courseopt{$seclevel},'course']; }
}	}

Line 2536 sub parmval_real {	Line 2988 sub parmval_real {

my $meta_rwhat=$rwhat;	my $meta_rwhat=$rwhat;
$meta_rwhat=~s/\./_/g;	$meta_rwhat=~s/\./_/g;
my $default=&Apache::lonnet::metadata($fn,$meta_rwhat);	my $default=&Apache::lonnet::metadata($fn,$meta_rwhat,$toolsymb);
if (defined($default)) { return [$default,'resource']}	if (defined($default)) { return [$default,'resource']}
$default=&Apache::lonnet::metadata($fn,'parameter_'.$meta_rwhat);	$default=&Apache::lonnet::metadata($fn,'parameter_'.$meta_rwhat,$toolsymb);
if (defined($default)) { return [$default,'resource']}	if (defined($default)) { return [$default,'resource']}
# --------------------------------------------------- fifth, check more course	# --------------------------------------------------- fifth, check more course
if (defined($courseopt)) {	if (defined($courseopt)) {
if (defined($$courseopt{$courselevelm})) { return [$$courseopt{$courselevelm},'map']; }	if (defined($$courseopt{$courselevelm})) { return [$$courseopt{$courselevelm},'map']; }
	if (defined($$courseopt{$courseleveli})) { return [$$courseopt{$courseleveli},'map']; }
	unless ($recursed) {
	@recurseup = $self->recurseup_maps($mapname);
	$recursed = 1;
	}
	foreach my $item (@recurseup) {
	my $norecursechk=$usercourseprefix.'.'.$item.'___(all).'.$what;
	if (defined($$courseopt{$norecursechk})) {
	if ($what =~ /\.(encrypturl\|hiddenresource)$/) {
	return [$$courseopt{$norecursechk},'map'];
	} else {
	last;
	}
	}
	my $recursechk=$usercourseprefix.'.'.$item.'___(rec).'.$what;
	if (defined($$courseopt{$recursechk})) {
	return [$$courseopt{$recursechk},'map'];
	}
	}
if (defined($$courseopt{$courselevel})) {	if (defined($$courseopt{$courselevel})) {
my $ret = [$$courseopt{$courselevel},'course'];	my $ret = [$$courseopt{$courselevel},'course'];
return $ret;	return $ret;
Line 2561 sub parmval_real {	Line 3032 sub parmval_real {
if (defined($partgeneral[0])) { return \@partgeneral; }	if (defined($partgeneral[0])) { return \@partgeneral; }
}	}
if ($recurse) { return []; }	if ($recurse) { return []; }
my $pack_def=&Apache::lonnet::packages_tab_default($fn,'resource.'.$rwhat);	my $pack_def=&Apache::lonnet::packages_tab_default($fn,'resource.'.$rwhat,$toolsymb);
if (defined($pack_def)) { return [$pack_def,'resource']; }	if (defined($pack_def)) { return [$pack_def,'resource']; }
return [''];	return [''];
}	}

	sub recurseup_maps {
	my ($self,$mapname) = @_;
	my @recurseup;
	if ($mapname) {
	my $res = $self->getResourceByUrl($mapname);
	if (ref($res)) {
	my @pcs = split(/,/,$res->map_hierarchy());
	shift(@pcs);
	if (@pcs) {
	@recurseup = map { &Apache::lonnet::declutter($self->getByMapPc($_)->src()); } reverse(@pcs);
	}
	}
	}
	return @recurseup;
	}

	sub recursed_crumbs {
	my ($self,$mapurl,$restitle) = @_;
	my (@revmapinfo,@revmapres);
	my $mapres = $self->getResourceByUrl($mapurl);
	if (ref($mapres)) {
	@revmapres = map { $self->getByMapPc($_); } split(/,/,$mapres->map_breadcrumbs());
	shift(@revmapres);
	}
	my $allowedlength = 60;
	my $minlength = 5;
	my $allowedtitle = 30;
	if (($env{'environment.icons'} eq 'iconsonly') && (!$env{'browser.mobile'})) {
	$allowedlength = 100;
	$allowedtitle = 70;
	}
	if (length($restitle) > $allowedtitle) {
	$restitle = &truncate_crumb_text($restitle,$allowedtitle);
	}
	my $totallength = length($restitle);
	my @links;

	foreach my $map (@revmapres) {
	my $pc = $map->map_pc();
	next if ((!$pc) \|\| ($pc == 1));
	push(@links,$map);
	push(@revmapinfo,{'href' => $env{'request.use_absolute'}.$map->link().'?navmap=1','text' => $map->title(),'no_mt' => 1,});
	$totallength += length($map->title());
	}
	my $numlinks = scalar(@links);
	if ($numlinks) {
	if ($totallength - $allowedlength > 0) {
	my $available = $allowedlength - length($restitle);
	my $avg = POSIX::ceil($available/$numlinks);
	if ($avg < $minlength) {
	$avg = $minlength;
	}
	@revmapinfo = ();
	foreach my $map (@links) {
	my $showntitle = &truncate_crumb_text($map->title(),$avg);
	if ($showntitle ne '') {
	push(@revmapinfo,{'href' => $env{'request.use_absolute'}.$map->link().'?navmap=1','text' => $showntitle,'no_mt' => 1,});
	}
	}
	}
	}
	if ($restitle ne '') {
	push(@revmapinfo,{'text' => $restitle, 'no_mt' => 1});
	}
	return @revmapinfo;
	}

	sub truncate_crumb_text {
	my ($title,$limit) = @_;
	my $showntitle = '';
	if (length($title) > $limit) {
	my @words = split(/\b\s*/,$title);
	if (@words == 1) {
	$showntitle = substr($title,0,$limit).' ...';
	} else {
	my $linklength = 0;
	my $num = 0;
	foreach my $word (@words) {
	$linklength += 1+length($word);
	if ($word eq '-') {
	$showntitle =~ s/ $//;
	$showntitle .= $word;
	} elsif ($linklength > $limit) {
	if ($num < @words) {
	$showntitle .= $word.' ...';
	last;
	} else {
	$showntitle .= $word;
	}
	} else {
	$showntitle .= $word.' ';
	}
	}
	$showntitle =~ s/ $//;
	}
	return $showntitle;
	} else {
	return $title;
	}
	}

	#
	# Determines the open/close dates for printing a map that
	# encloses a resource.
	#
	sub map_printdates {
	my ($self, $res, $part) = @_;





	my $opendate = $self->get_mapparam($res->symb(),'',"$part.printstartdate");
	my $closedate= $self->get_mapparam($res->symb(),'',"$part.printenddate");


	return ($opendate, $closedate);
	}

	sub get_mapparam {
	my ($self, $symb, $mapname, $what) = @_;

	# Ensure the course option hash is populated:

	$self->generate_course_user_opt();

	# Get the course id and section if there is one.

	my $cid=$env{'request.course.id'};
	my $csec=$env{'request.course.sec'};
	my $cgroup='';
	my @cgrps=split(/:/,$env{'request.course.groups'});
	if (@cgrps > 0) {
	@cgrps = sort(@cgrps);
	$cgroup = $cgrps[0];
	}
	my $uname=$self->{USERNAME};
	my $udom=$self->{DOMAIN};

	unless ($symb \|\| $mapname) { return; }
	my $result='';
	my ($recursed,@recurseup);


	# Figure out which map we are in.

	if ($symb && !$mapname) {
	my ($id,$fn);
	($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
	$mapname = &Apache::lonnet::deversion($mapname);
	}


	my $rwhat=$what;
	$what=~s/^parameter\_//;
	$what=~s/\_/\./;

	# Build the hash keys for the lookup:

	my $mapparm=$mapname.'___(all).'.$what;
	my $recurseparm=$mapname.'___(rec).'.$what;
	my $usercourseprefix=$cid;


	my $grplevelm = "$usercourseprefix.[$cgroup].$mapparm";
	my $seclevelm = "$usercourseprefix.[$csec].$mapparm";
	my $courselevelm = "$usercourseprefix.$mapparm";

	my $grpleveli = "$usercourseprefix.[$cgroup].$recurseparm";
	my $secleveli = "$usercourseprefix.[$csec].$recurseparm";
	my $courseleveli = "$usercourseprefix.$recurseparm";

	# Get handy references to the hashes we need in $self:

	my $useropt = $self->{USER_OPT};
	my $courseopt = $self->{COURSE_OPT};
	my $parmhash = $self->{PARM_HASH};

	# Check per user



	if ($uname and defined($useropt)) {
	if (defined($$useropt{$courselevelm})) {
	return $$useropt{$courselevelm};
	}
	if (defined($$useropt{$courseleveli})) {
	return $$useropt{$courseleveli};
	}
	unless ($recursed) {
	@recurseup = $self->recurseup_maps($mapname);
	$recursed = 1;
	}
	foreach my $item (@recurseup) {
	my $norecursechk=$usercourseprefix.'.'.$item.'___(all).'.$what;
	if (defined($$useropt{$norecursechk})) {
	if ($what =~ /\.(encrypturl\|hiddenresource)$/) {
	return $$useropt{$norecursechk};
	} else {
	last;
	}
	}
	my $recursechk=$usercourseprefix.'.'.$item.'___(rec).'.$what;
	if (defined($$useropt{$recursechk})) {
	return $$useropt{$recursechk};
	}
	}
	}

	# Check course -- group



	if ($cgroup ne '' and defined ($courseopt)) {
	if (defined($$courseopt{$grplevelm})) {
	return $$courseopt{$grplevelm};
	}
	if (defined($$courseopt{$grpleveli})) {
	return $$courseopt{$grpleveli};
	}
	unless ($recursed) {
	@recurseup = $self->recurseup_maps($mapname);
	$recursed = 1;
	}
	foreach my $item (@recurseup) {
	my $norecursechk=$usercourseprefix.'.['.$cgroup.'].'.$item.'___(all).'.$what;
	if (defined($$courseopt{$norecursechk})) {
	if ($what =~ /\.(encrypturl\|hiddenresource)$/) {
	return $$courseopt{$norecursechk};
	} else {
	last;
	}
	}
	my $recursechk=$usercourseprefix.'.['.$cgroup.'].'.$item.'___(rec).'.$what;
	if (defined($$courseopt{$recursechk})) {
	return $$courseopt{$recursechk};
	}
	}
	}

	# Check course -- section


	if ($csec ne '' and defined($courseopt)) {
	if (defined($$courseopt{$seclevelm})) {
	return $$courseopt{$seclevelm};
	}
	if (defined($$courseopt{$secleveli})) {
	return $$courseopt{$secleveli};
	}
	unless ($recursed) {
	@recurseup = $self->recurseup_maps($mapname);
	$recursed = 1;
	}
	foreach my $item (@recurseup) {
	my $norecursechk=$usercourseprefix.'.['.$csec.'].'.$item.'___(all).'.$what;
	if (defined($$courseopt{$norecursechk})) {
	if ($what =~ /\.(encrypturl\|hiddenresource)$/) {
	return $$courseopt{$norecursechk};
	} else {
	last;
	}
	}
	my $recursechk=$usercourseprefix.'.['.$csec.'].'.$item.'___(rec).'.$what;
	if (defined($$courseopt{$recursechk})) {
	return $$courseopt{$recursechk};
	}
	}
	}
	# Check the map parameters themselves:

	if ($symb) {
	my $symbparm=$symb.'.'.$what;
	my $thisparm = $$parmhash{$symbparm};
	if (defined($thisparm)) {
	return $thisparm;
	}
	}


	# Additional course parameters:

	if (defined($courseopt)) {
	if (defined($$courseopt{$courselevelm})) {
	return $$courseopt{$courselevelm};
	}
	if (defined($$courseopt{$courseleveli})) {
	return $$courseopt{$courseleveli};
	}
	unless ($recursed) {
	@recurseup = $self->recurseup_maps($mapname);
	$recursed = 1;
	}
	if (@recurseup) {
	foreach my $item (@recurseup) {
	my $norecursechk=$usercourseprefix.'.'.$item.'___(all).'.$what;
	if (defined($$courseopt{$norecursechk})) {
	if ($what =~ /\.(encrypturl\|hiddenresource)$/) {
	return $$courseopt{$norecursechk};
	} else {
	last;
	}
	}
	my $recursechk=$usercourseprefix.'.'.$item.'___(rec).'.$what;
	if (defined($$courseopt{$recursechk})) {
	return $$courseopt{$recursechk};
	}
	}
	}
	}
	return undef; # Undefined if we got here.
	}

	sub course_printdates {
	my ($self, $symb, $part) = @_;


	my $opendate = $self->getcourseparam($symb, $part . '.printstartdate');
	my $closedate = $self->getcourseparam($symb, $part . '.printenddate');
	return ($opendate, $closedate);

	}

	sub getcourseparam {
	my ($self, $symb, $what) = @_;

	$self->generate_course_user_opt(); # If necessary populate the hashes.

	my $uname = $self->{USERNAME};
	my $udom = $self->{DOMAIN};

	# Course, section, group ids come from the env:

	my $cid = $env{'request.course.id'};
	my $csec = $env{'request.course.sec'};
	my $cgroup = ''; # Assume no group

	my @cgroups = split(/:/, $env{'request.course.groups'});
	if(@cgroups > 0) {
	@cgroups = sort(@cgroups);
	$cgroup = $cgroups[0]; # There is a course group.
	}
	my ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
	$mapname = &Apache::lonnet::deversion($mapname);

	#
	# Make the various lookup keys:
	#

	$what=~s/^parameter\_//;
	$what=~s/\_/\./;

	# Local refs to the hashes we're going to look at:

	my $useropt = $self->{USER_OPT};
	my $courseopt = $self->{COURSE_OPT};

	#
	# We want the course level stuff from the way
	# parmval_real operates
	# TODO: Factor some of this stuff out of
	# both parmval_real and here
	#
	my $courselevel = $cid . '.' . $what;
	my $grplevel = $cid . '.[' . $cgroup . ']' . $what;
	my $seclevel = $cid . '.[' . $csec . ']' . $what;


	# Try for the user's course level option:

	if ($uname and defined($useropt)) {
	if (defined($$useropt{$courselevel})) {
	return $$useropt{$courselevel};
	}
	}
	# Try for the group's course level option:

	if ($cgroup ne '' and defined($courseopt)) {
	if (defined($$courseopt{$grplevel})) {
	return $$courseopt{$grplevel};
	}
	}

	# Try for section level parameters:

	if ($csec ne '' and defined($courseopt)) {
	if (defined($$courseopt{$seclevel})) {
	return $$courseopt{$seclevel};
	}
	}
	# Try for 'additional' course parameters:

	if (defined($courseopt)) {
	if (defined($$courseopt{$courselevel})) {
	return $$courseopt{$courselevel};
	}
	}
	return undef;

	}


=pod	=pod

=item * B<getResourceByUrl>(url,multiple):	=item * B<getResourceByUrl>(url,multiple):
Line 2580 resource appears multiple times in the c	Line 3453 resource appears multiple times in the c
will be returned (useful for maps), unless the multiple parameter has	will be returned (useful for maps), unless the multiple parameter has
been included, in which case all instances are returned in an array.	been included, in which case all instances are returned in an array.

=item * B<retrieveResources>(map, filterFunc, recursive, bailout, showall):	=item * B<retrieveResources>(map, filterFunc, recursive, bailout, showall, noblockcheck):

The map is a specification of a map to retreive the resources from,	The map is a specification of a map to retreive the resources from,
either as a url or as an object. The filterFunc is a reference to a	either as a url or as an object. The filterFunc is a reference to a
Line 2589 true if the resource should be included,	Line 3462 true if the resource should be included,
be. If recursive is true, the map will be recursively examined,	be. If recursive is true, the map will be recursively examined,
otherwise it will not be. If bailout is true, the function will return	otherwise it will not be. If bailout is true, the function will return
as soon as it finds a resource, if false it will finish. If showall is	as soon as it finds a resource, if false it will finish. If showall is
true it will not hide maps that contain nothing but one other map. By	true it will not hide maps that contain nothing but one other map. The
default, the map is the top-level map of the course, filterFunc is a	noblockcheck arg is propagated to become the sixth arg in the call to
function that always returns 1, recursive is true, bailout is false,	lonnet::allowed when checking a resource's availability during collection
showall is false. The resources will be returned in a list containing	of resources using the iterator. noblockcheck needs to be true if
the resource objects for the corresponding resources, with B<no	retrieveResources() was called by a routine that itself was called by
structure information> in the list; regardless of branching,	lonnet::allowed, in order to avoid recursion. By default the map
recursion, etc., it will be a flat list.	is the top-level map of the course, filterFunc is a function that
	always returns 1, recursive is true, bailout is false, showall is
	false. The resources will be returned in a list containing the
	resource objects for the corresponding resources, with B<no structure
	information> in the list; regardless of branching, recursion, etc.,
	it will be a flat list.

Thus, this is suitable for cases where you don't want the structure,	Thus, this is suitable for cases where you don't want the structure,
just a list of all resources. It is also suitable for finding out how	just a list of all resources. It is also suitable for finding out how
Line 2618 in the filter function.	Line 3496 in the filter function.
Retrieves version infomation for a url. Returns the version (a number, or	Retrieves version infomation for a url. Returns the version (a number, or
the string "mostrecent") for resources which have version information in	the string "mostrecent") for resources which have version information in
the big hash.	the big hash.

=cut	=cut


Line 2662 sub retrieveResources {	Line 3540 sub retrieveResources {
my $bailout = shift;	my $bailout = shift;
if (!defined($bailout)) { $bailout = 0; }	if (!defined($bailout)) { $bailout = 0; }
my $showall = shift;	my $showall = shift;
	my $noblockcheck = shift;
# Create the necessary iterator.	# Create the necessary iterator.
if (!ref($map)) { # assume it's a url of a map.	if (!ref($map)) { # assume it's a url of a map.
$map = $self->getResourceByUrl($map);	$map = $self->getResourceByUrl($map);
Line 2691 sub retrieveResources {	Line 3570 sub retrieveResources {
# Run down the iterator and collect the resources.	# Run down the iterator and collect the resources.
my $curRes;	my $curRes;

while ($curRes = $it->next()) {	while ($curRes = $it->next(undef,$noblockcheck)) {
if (ref($curRes)) {	if (ref($curRes)) {
if (!&$filterFunc($curRes)) {	if (!&$filterFunc($curRes)) {
next;	next;
Line 2725 sub usedVersion {	Line 3604 sub usedVersion {
return $self->navhash("version_$linkurl");	return $self->navhash("version_$linkurl");
}	}

	sub isFirstResource {
	my $self = shift;
	my $map = shift;
	my $symb = shift;
	return unless (ref($map));
	my $isfirst;
	my $firstResource = $map->map_start();
	if (ref($firstResource)) {
	if ((!$firstResource->is_map()) && ($firstResource->src() ne '')) {
	if ($firstResource->symb() eq $symb) {
	$isfirst = 1;
	} else {
	$isfirst = 0;
	}
	} else {
	my $it = $self->getIterator($firstResource,undef,undef,1);
	while ( my $res=$it->next()) {
	if ((ref($res)) && ($res->src() ne '') && (!$res->is_map())) {
	if ($res->symb() eq $symb) {
	$isfirst = 1;
	} else {
	$isfirst = 0;
	}
	last;
	}
	}
	}
	}
	return $isfirst;
	}

	sub isLastResource {
	my $self = shift;
	my $map = shift;
	my $symb = shift;
	return unless (ref($map));
	my $islast;
	my $lastResource = $map->map_finish();
	if (ref($lastResource)) {
	if ((!$lastResource->is_map()) && ($lastResource->src() ne '')) {
	if ($lastResource->symb() eq $symb) {
	$islast = 1;
	} else {
	$islast = 0;
	}
	} else {
	my $currRes = $self->getBySymb($symb);
	if (ref($currRes)) {
	my $it = $self->getIterator($currRes,undef,undef,1);
	while ( my $res=$it->next()) {
	if ((ref($res)) && ($res->src() ne '') && (!$res->is_map())) {
	if ($res->symb() eq $symb) {
	$islast = 1;
	} else {
	$islast = 0;
	}
	last;
	}
	}
	}
	}
	}
	return $islast;
	}

1;	1;

package Apache::lonnavmaps::iterator;	package Apache::lonnavmaps::iterator;
Line 2755 getIterator behaves as follows:	Line 3699 getIterator behaves as follows:

=over 4	=over 4

=item * B<getIterator>(firstResource, finishResource, filterHash, condition, forceTop, returnTopMap):	=item * B<getIterator>(firstResource, finishResource, filterHash, condition, forceTop, returnTopMap, $deeplinklisted):

All parameters are optional. firstResource is a resource reference	All parameters are optional. firstResource is a resource reference
corresponding to where the iterator should start. It defaults to	corresponding to where the iterator should start. It defaults to
Line 2772 that is not just a single, 'redirecting'	Line 3716 that is not just a single, 'redirecting'
will return all information, starting with the top-level map,	will return all information, starting with the top-level map,
regardless of content. returnTopMap, if true (default false), will	regardless of content. returnTopMap, if true (default false), will
cause the iterator to return the top-level map object (resource 0.0)	cause the iterator to return the top-level map object (resource 0.0)
before anything else.	before anything else. deeplinklisted if true (default false), will
	check "listed" status of a resource with a deeplink, and unless "absent"
	will exclude deeplink checking when retrieving the browsePriv from
	lonnet::allowed().

Thus, by default, only top-level resources will be shown. Change the	Thus, by default, only top-level resources will be shown. Change the
condition to a 1 without changing the hash, and all resources will be	condition to a 1 without changing the hash, and all resources will be
Line 2842 Note that inside of the loop, it's frequ	Line 3789 Note that inside of the loop, it's frequ
resource objects will be references, and any non-references will	resource objects will be references, and any non-references will
be the tokens described above.	be the tokens described above.

Also note there is some old code floating around that trys to track	The next() routine can take two (optional) arguments:
	closeAllPages - if true will not recurse down a .page
	noblockcheck - passed to browsePriv() for passing as sixth arg to
	call to lonnet::allowed. This needs to be set if retrieveResources
	was already called from another routine called within lonnet::allowed,
	so as to prevent recursion.

	Also note there is some old code floating around that tries to track
the depth of the iterator to see when it's done; do not copy that	the depth of the iterator to see when it's done; do not copy that
code. It is difficult to get right and harder to understand than	code. It is difficult to get right and harder to understand than
this. They should be migrated to this new style.	this. They should be migrated to this new style.
Line 2873 sub new {	Line 3827 sub new {
weaken($self->{NAV_MAP} = shift);	weaken($self->{NAV_MAP} = shift);
return undef unless ($self->{NAV_MAP});	return undef unless ($self->{NAV_MAP});

	$self->{USERNAME} = $self->{NAV_MAP}->{USERNAME};
	$self->{DOMAIN} = $self->{NAV_MAP}->{DOMAIN};

# Handle the parameters	# Handle the parameters
$self->{FIRST_RESOURCE} = shift \|\| $self->{NAV_MAP}->firstResource();	$self->{FIRST_RESOURCE} = shift \|\| $self->{NAV_MAP}->firstResource();
$self->{FINISH_RESOURCE} = shift \|\| $self->{NAV_MAP}->finishResource();	$self->{FINISH_RESOURCE} = shift \|\| $self->{NAV_MAP}->finishResource();
Line 2899 sub new {	Line 3856 sub new {
# have we done that yet?	# have we done that yet?
$self->{HAVE_RETURNED_0} = 0;	$self->{HAVE_RETURNED_0} = 0;

	# Do we want to check the "listed" status for a resource for which
	# deeplinking applies.
	$self->{DEEPLINKLISTED} = shift;

# Now, we need to pre-process the map, by walking forward and backward	# Now, we need to pre-process the map, by walking forward and backward
# over the parts of the map we're going to look at.	# over the parts of the map we're going to look at.

Line 2986 sub new {	Line 3947 sub new {
if ($resourceCount == 1 && $resource->is_sequence() && !$self->{FORCE_TOP}) {	if ($resourceCount == 1 && $resource->is_sequence() && !$self->{FORCE_TOP}) {
my $firstResource = $resource->map_start();	my $firstResource = $resource->map_start();
my $finishResource = $resource->map_finish();	my $finishResource = $resource->map_finish();
return	return Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,	$finishResource, $self->{FILTER},
$finishResource, $self->{FILTER},	$self->{ALREADY_SEEN},
$self->{ALREADY_SEEN},	$self->{CONDITION},
$self->{CONDITION},	$self->{FORCE_TOP},
$self->{FORCE_TOP});	undef,$self->{DEEPLINKLISTED});

}	}

# Set up some bookkeeping information.	# Set up some bookkeeping information.
Line 3011 sub new {	Line 3971 sub new {
$self->{ALREADY_SEEN}->{$self->{FIRST_RESOURCE}->{ID}} = 1;	$self->{ALREADY_SEEN}->{$self->{FIRST_RESOURCE}->{ID}} = 1;

bless ($self);	bless ($self);

return $self;	return $self;
}	}

sub next {	sub next {
my $self = shift;	my $self = shift;
my $closeAllPages=shift;	my $closeAllPages=shift;
	my $noblockcheck = shift;
if ($self->{FINISHED}) {	if ($self->{FINISHED}) {
return END_ITERATOR();	return END_ITERATOR();
}	}
Line 3026 sub next {	Line 3986 sub next {
# do so.	# do so.
if ($self->{RETURN_0} && !$self->{HAVE_RETURNED_0}) {	if ($self->{RETURN_0} && !$self->{HAVE_RETURNED_0}) {
$self->{HAVE_RETURNED_0} = 1;	$self->{HAVE_RETURNED_0} = 1;
	my $nextTopLevel = $self->{NAV_MAP}->getById('0.0');
return $self->{NAV_MAP}->getById('0.0');	return $self->{NAV_MAP}->getById('0.0');
}	}
if ($self->{RETURN_0} && !$self->{HAVE_RETURNED_0_BEGIN_MAP}) {	if ($self->{RETURN_0} && !$self->{HAVE_RETURNED_0_BEGIN_MAP}) {
Line 3045 sub next {	Line 4006 sub next {
if ($self->{RECURSIVE_DEPTH} == 0) {	if ($self->{RECURSIVE_DEPTH} == 0) {
$self->{RECURSIVE_ITERATOR_FLAG} = 0;	$self->{RECURSIVE_ITERATOR_FLAG} = 0;
}	}

return $next;	return $next;
}	}

Line 3121 sub next {	Line 4081 sub next {
# So we need to look at all the resources we can get to from here,	# So we need to look at all the resources we can get to from here,
# categorize them if we haven't seen them, remember if we have a new	# categorize them if we haven't seen them, remember if we have a new
my $nextUnfiltered = $here->getNext();	my $nextUnfiltered = $here->getNext();


my $maxDepthAdded = -1;	my $maxDepthAdded = -1;

for (@$nextUnfiltered) {	for (@$nextUnfiltered) {
Line 3150 sub next {	Line 4112 sub next {
# That ends the main iterator logic. Now, do we want to recurse	# That ends the main iterator logic. Now, do we want to recurse
# down this map (if this resource is a map)?	# down this map (if this resource is a map)?
if ( ($self->{HERE}->is_sequence() \|\| (!$closeAllPages && $self->{HERE}->is_page())) &&	if ( ($self->{HERE}->is_sequence() \|\| (!$closeAllPages && $self->{HERE}->is_page())) &&
(defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {	(defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION}) &&
	($env{'request.role.adv'} \|\| !$self->{HERE}->randomout())) {
$self->{RECURSIVE_ITERATOR_FLAG} = 1;	$self->{RECURSIVE_ITERATOR_FLAG} = 1;
my $firstResource = $self->{HERE}->map_start();	my $firstResource = $self->{HERE}->map_start();
my $finishResource = $self->{HERE}->map_finish();	my $finishResource = $self->{HERE}->map_finish();

$self->{RECURSIVE_ITERATOR} =	$self->{RECURSIVE_ITERATOR} =
Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,	Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
$finishResource, $self->{FILTER},	$finishResource, $self->{FILTER},
$self->{ALREADY_SEEN},	$self->{ALREADY_SEEN},
$self->{CONDITION},	$self->{CONDITION},
$self->{FORCE_TOP});	$self->{FORCE_TOP},
	undef,$self->{DEEPLINKLISTED});
}	}

# If this is a blank resource, don't actually return it.	# If this is a blank resource, don't actually return it.
# Should you ever find you need it, make sure to add an option to the code	# Should you ever find you need it, make sure to add an option to the code
# that you can use; other things depend on this behavior.	# that you can use; other things depend on this behavior.
my $browsePriv = $self->{HERE}->browsePriv();	my $browsePriv = $self->{HERE}->browsePriv($noblockcheck,$self->{DEEPLINKLISTED});
if (!$self->{HERE}->src() \|\|	if (!$self->{HERE}->src() \|\|
(!($browsePriv eq 'F') && !($browsePriv eq '2')) ) {	(!($browsePriv eq 'F') && !($browsePriv eq '2')) ) {
return $self->next($closeAllPages);	return $self->next($closeAllPages);
Line 3246 sub new {	Line 4209 sub new {
weaken($self->{NAV_MAP} = shift);	weaken($self->{NAV_MAP} = shift);
return undef unless ($self->{NAV_MAP});	return undef unless ($self->{NAV_MAP});

	$self->{USERNAME} = $self->{NAV_MAP}->{USERNAME};
	$self->{DOMAIN} = $self->{NAV_MAP}->{DOMAIN};

$self->{FIRST_RESOURCE} = shift \|\| $self->{NAV_MAP}->firstResource();	$self->{FIRST_RESOURCE} = shift \|\| $self->{NAV_MAP}->firstResource();
$self->{FINISH_RESOURCE} = shift \|\| $self->{NAV_MAP}->finishResource();	$self->{FINISH_RESOURCE} = shift \|\| $self->{NAV_MAP}->finishResource();

Line 3482 sub new {	Line 4448 sub new {
weaken($self->{NAV_MAP} = shift);	weaken($self->{NAV_MAP} = shift);
$self->{ID} = shift;	$self->{ID} = shift;

	$self->{USERNAME} = $self->{NAV_MAP}->{USERNAME};
	$self->{DOMAIN} = $self->{NAV_MAP}->{DOMAIN};

# Store this new resource in the parent nav map's cache.	# Store this new resource in the parent nav map's cache.
$self->{NAV_MAP}->{RESOURCE_CACHE}->{$self->{ID}} = $self;	$self->{NAV_MAP}->{RESOURCE_CACHE}->{$self->{ID}} = $self;
$self->{RESOURCE_ERROR} = 0;	$self->{RESOURCE_ERROR} = 0;

	$self->{DUEDATE_CACHE} = undef;

# A hash that can be used by two-pass algorithms to store data	# A hash that can be used by two-pass algorithms to store data
# about this resource in. Not used by the resource object	# about this resource in. Not used by the resource object
# directly.	# directly.
$self->{DATA} = {};	$self->{DATA} = {};

bless($self);	bless($self);

	# This is a speed optimization, to avoid calling symb() too often.
	$self->{SYMB} = $self->symb();

return $self;	return $self;
}	}

Line 3503 sub navHash {	Line 4477 sub navHash {
my $self = shift;	my $self = shift;
my $param = shift;	my $param = shift;
my $id = shift;	my $id = shift;
return $self->{NAV_MAP}->navhash($param . ($id?$self->{ID}:""));	my $arg = $param . ($id?$self->{ID}:"");
	if (ref($self) && ref($self->{NAV_MAP}) && defined($arg)) {
	return $self->{NAV_MAP}->navhash($arg);
	}
	return;
}	}

=pod	=pod
Line 3579 sub from { my $self=shift; return $self-	Line 4557 sub from { my $self=shift; return $self-
sub goesto { my $self=shift; return $self->navHash("goesto_", 1); }	sub goesto { my $self=shift; return $self->navHash("goesto_", 1); }
sub kind { my $self=shift; return $self->navHash("kind_", 1); }	sub kind { my $self=shift; return $self->navHash("kind_", 1); }
sub randomout { my $self=shift; return $self->navHash("randomout_", 1); }	sub randomout { my $self=shift; return $self->navHash("randomout_", 1); }
	sub deeplinkout { my $self=shift; return $self->navHash("deeplinkout_", 1); }
sub randompick {	sub randompick {
my $self = shift;	my $self = shift;
my $randompick = $self->parmval('randompick');	my $randompick = $self->parmval('randompick');
Line 3600 sub src {	Line 4579 sub src {
}	}
sub shown_symb {	sub shown_symb {
my $self=shift;	my $self=shift;
if ($self->encrypted()) {return &Apache::lonenc::encrypted($self->symb());}	if ($self->encrypted()) {return &Apache::lonenc::encrypted($self->{SYMB});}
return $self->symb();	return $self->{SYMB};
}	}
sub id {	sub id {
my $self=shift;	my $self=shift;
Line 3614 sub enclosing_map_src {	Line 4593 sub enclosing_map_src {
}	}
sub symb {	sub symb {
my $self=shift;	my $self=shift;
	if (defined $self->{SYMB}) { return $self->{SYMB}; }
(my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;	(my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
my $symbSrc = &Apache::lonnet::declutter($self->src());	my $symbSrc = &Apache::lonnet::declutter($self->src());
my $symb = &Apache::lonnet::declutter($self->navHash('map_id_'.$first))	my $symb = &Apache::lonnet::declutter($self->navHash('map_id_'.$first))
Line 3622 sub symb {	Line 4602 sub symb {
}	}
sub wrap_symb {	sub wrap_symb {
my $self = shift;	my $self = shift;
return $self->{NAV_MAP}->wrap_symb($self->symb());	return $self->{NAV_MAP}->wrap_symb($self->{SYMB});
}	}
sub title {	sub title {
my $self=shift;	my $self=shift;
Line 3741 sub is_practice {	Line 4721 sub is_practice {
sub is_problem {	sub is_problem {
my $self=shift;	my $self=shift;
my $src = $self->src();	my $src = $self->src();
if ($src =~ /\.(problem\|exam\|quiz\|assess\|survey\|form\|library\|task)$/) {	if ($src =~ /$LONCAPA::assess_re/) {
return !($self->is_practice());	return !($self->is_practice());
}	}
return 0;	return 0;
}	}
	sub is_tool {
	my $self=shift;
	my $src = $self->src();
	return ($src =~ /ext\.tool$/);
	}
	sub is_gradable {
	my $self=shift;
	my $src = $self->src();
	if (($src =~ /$LONCAPA::assess_re/) \|\|
	(($self->is_tool()) && ($self->parmval('gradable',0) =~ /^yes$/i))) {
	return !($self->is_practice());
	}
	}
	#
	# The has below is the set of status that are considered 'incomplete'
	#
	my %incomplete_hash =
	(
	TRIES_LEFT() => 1,
	OPEN() => 1,
	ATTEMPTED() => 1

	);
	#
	# Return tru if a problem is incomplete... for now incomplete means that
	# any part of the problem is incomplete.
	# Note that if the resources is not a problem, 0 is returned.
	#
	sub is_incomplete {
	my $self = shift;
	if ($self->is_problem()) {
	foreach my $part (@{$self->parts()}) {
	if (exists($incomplete_hash{$self->status($part)})) {
	return 1;
	}
	}
	}
	return 0;

	}
sub is_raw_problem {	sub is_raw_problem {
my $self=shift;	my $self=shift;
my $src = $self->src();	my $src = $self->src();
if ($src =~ /\.(problem\|exam\|quiz\|assess\|survey\|form\|library\|task)$/) {	if ($src =~ /$LONCAPA::assess_re/) {
return 1;	return 1;
}	}
return 0;	return 0;
Line 3775 sub map_contains_problem {	Line 4795 sub map_contains_problem {
sub is_sequence {	sub is_sequence {
my $self=shift;	my $self=shift;
return $self->navHash("is_map_", 1) &&	return $self->navHash("is_map_", 1) &&
$self->navHash("map_type_" . $self->map_pc()) eq 'sequence';	$self->navHash("map_type_" . $self->map_pc()) eq 'sequence';
}	}
sub is_survey {	sub is_survey {
my $self = shift();	my $self = shift();
my $part = shift();	my $part = shift();
my $type = $self->parmval('type',$part);	my $type = $self->parmval('type',$part);
if ($type eq 'survey') {	if (($type eq 'survey') \|\| ($type eq 'surveycred')) {
return 1;	return 1;
}	}
if ($self->src() =~ /\.(survey)$/) {	if ($self->src() =~ /\.(survey)$/) {
Line 3789 sub is_survey {	Line 4809 sub is_survey {
}	}
return 0;	return 0;
}	}
	sub is_anonsurvey {
	my $self = shift();
	my $part = shift();
	my $type = $self->parmval('type',$part);
	if (($type eq 'anonsurvey') \|\| ($type eq 'anonsurveycred')) {
	return 1;
	}
	return 0;
	}
sub is_task {	sub is_task {
my $self=shift;	my $self=shift;
my $src = $self->src();	my $src = $self->src();
Line 3797 sub is_task {	Line 4826 sub is_task {

sub is_empty_sequence {	sub is_empty_sequence {
my $self=shift;	my $self=shift;
my $src = $self->src();
return !$self->is_page() && $self->navHash("is_map_", 1) && !$self->navHash("map_type_" . $self->map_pc());	return !$self->is_page() && $self->navHash("is_map_", 1) && !$self->navHash("map_type_" . $self->map_pc());
}	}

Line 3809 sub parmval {	Line 4837 sub parmval {
if (!defined($part)) {	if (!defined($part)) {
$part = '0';	$part = '0';
}	}
return $self->{NAV_MAP}->parmval($part.'.'.$what, $self->symb());	return $self->{NAV_MAP}->parmval($part.'.'.$what, $self->{SYMB});
}	}

=pod	=pod
Line 3842 resource of the map.	Line 4870 resource of the map.

Returns a string with the type of the map in it.	Returns a string with the type of the map in it.

	=item * B<map_hierarchy>:

	Returns a string with a comma-separated ordered list of map_pc IDs
	for the hierarchy of maps containing a map, with the top level
	map first, then descending to deeper levels, with the enclosing map last.

	=item * B<map_breadcrumbs>:

	Same as map_hierarchy, except maps containing only a single itemm if
	it's a map, or containing no items are omitted, unless it's the top
	level map (map_pc = 1), which is always included.

=back	=back

=cut	=cut
Line 3872 sub map_type {	Line 4912 sub map_type {
my $pc = $self->map_pc();	my $pc = $self->map_pc();
return $self->navHash("map_type_$pc", 0);	return $self->navHash("map_type_$pc", 0);
}	}
	sub map_hierarchy {
	my $self = shift;
	my $pc = $self->map_pc();
	return $self->navHash("map_hierarchy_$pc", 0);
	}
	sub map_breadcrumbs {
	my $self = shift;
	my $pc = $self->map_pc();
	return $self->navHash("map_breadcrumbs_$pc", 0);
	}

#####	#####
# Property queries	# Property queries
Line 3902 their code.)	Line 4952 their code.)

=over 4	=over 4

=item * B<acc>:
	=item * B<printable>

	returns true if the current date is such that the
	specified resource part is printable.


	=item * B<resprintable>

	Returns true if all parts in the resource are printable making the
	entire resource printable.

	=item * B<acc>

Get the Client IP/Name Access Control information.	Get the Client IP/Name Access Control information.

Line 3955 Get the weight for the problem.	Line 5017 Get the weight for the problem.

=cut	=cut




	sub printable {

	my ($self, $part) = @_;

	# The following cases apply:
	# - If a start date is not set, it is replaced by the open date.
	# - Ditto for start/open replaced by content open.
	# - If neither start nor printdates are set the part is printable.
	# - Start date set but no end date: Printable if now >= start date.
	# - End date set but no start date: Printable if now <= end date.
	# - both defined: printable if start <= now <= end
	#

	# Get the print open/close dates for the resource.

	my $start = $self->parmval("printstartdate", $part);
	my $end = $self->parmval("printenddate", $part);

	if (!$start) {
	$start = $self->parmval("opendate", $part);
	}
	if (!$start) {
	$start = $self->parmval("contentopen", $part);
	}


	my $now = time();


	my $startok = 1;
	my $endok = 1;

	if ((defined $start) && ($start ne '')) {
	$startok = $start <= $now;
	}
	if ((defined $end) && ($end != '')) {
	$endok = $end >= $now;
	}
	return $startok && $endok;
	}

	sub resprintable {
	my $self = shift;

	# get parts...or realize there are no parts.

	my $partsref = $self->parts();
	my @parts = @$partsref;

	if (!@parts) {
	return $self->printable(0);
	} else {
	foreach my $part (@parts) {
	if (!$self->printable($part)) {
	return 0;
	}
	}
	return 1;
	}
	}

sub acc {	sub acc {
(my $self, my $part) = @_;	(my $self, my $part) = @_;
my $acc = $self->parmval("acc", $part);	my $acc = $self->parmval("acc", $part);
Line 3975 sub awarded {	Line 5101 sub awarded {
my $self = shift; my $part = shift;	my $self = shift; my $part = shift;
$self->{NAV_MAP}->get_user_data();	$self->{NAV_MAP}->get_user_data();
if (!defined($part)) { $part = '0'; }	if (!defined($part)) { $part = '0'; }
return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$part.'.awarded'};	return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.awarded'};
}	}
sub taskversion {	sub taskversion {
my $self = shift; my $part = shift;	my $self = shift; my $part = shift;
$self->{NAV_MAP}->get_user_data();	$self->{NAV_MAP}->get_user_data();
if (!defined($part)) { $part = '0'; }	if (!defined($part)) { $part = '0'; }
return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$part.'.version'};	return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.version'};
}	}
sub taskstatus {	sub taskstatus {
my $self = shift; my $part = shift;	my $self = shift; my $part = shift;
$self->{NAV_MAP}->get_user_data();	$self->{NAV_MAP}->get_user_data();
if (!defined($part)) { $part = '0'; }	if (!defined($part)) { $part = '0'; }
return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$self->taskversion($part).'.'.$part.'.status'};	return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$self->taskversion($part).'.'.$part.'.status'};
}	}
sub solved {	sub solved {
my $self = shift; my $part = shift;	my $self = shift; my $part = shift;
$self->{NAV_MAP}->get_user_data();	$self->{NAV_MAP}->get_user_data();
if (!defined($part)) { $part = '0'; }	if (!defined($part)) { $part = '0'; }
return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$part.'.solved'};	return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.solved'};
}	}
sub checkedin {	sub checkedin {
my $self = shift; my $part = shift;	my $self = shift; my $part = shift;
Line 4001 sub checkedin {	Line 5127 sub checkedin {
if (!defined($part)) { $part = '0'; }	if (!defined($part)) { $part = '0'; }
if ($self->is_task()) {	if ($self->is_task()) {
my $version = $self->taskversion($part);	my $version = $self->taskversion($part);
return ($self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$version .'.'.$part.'.checkedin'},$self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$version .'.'.$part.'.checkedin.slot'});	return ($self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$version .'.'.$part.'.checkedin'},$self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$version .'.'.$part.'.checkedin.slot'});
} else {	} else {
return ($self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$part.'.checkedin'},$self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$part.'.checkedin.slot'});	return ($self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.checkedin'},$self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.checkedin.slot'});
}	}
}	}
# this should work exactly like the copy in lonhomework.pm	# this should work exactly like the copy in lonhomework.pm
	# Why is there a copy in lonhomework? Why not centralized?
	#
	# TODO: Centralize duedate.
	#

sub duedate {	sub duedate {
(my $self, my $part) = @_;	(my $self, my $part) = @_;
	if (defined ($self->{DUEDATE_CACHE}->{$part})) {
	return $self->{DUEDATE_CACHE}->{$part};
	}
my $date;	my $date;
my @interval=$self->parmval("interval", $part);	my @interval=$self->parmval("interval", $part);
my $due_date=$self->parmval("duedate", $part);	my $due_date=$self->parmval("duedate", $part);
if ($interval[0] =~ /\d+/) {	if ($interval[0] =~ /^(\d+)/) {
my $first_access=&Apache::lonnet::get_first_access($interval[1],	my $timelimit = $1;
$self->symb);	my $first_access=&Apache::lonnet::get_first_access($interval[1],
	$self->{SYMB});
if (defined($first_access)) {	if (defined($first_access)) {
my $interval = $first_access+$interval[0];	my $interval = $first_access+$timelimit;
$date = (!$due_date \|\| $interval < $due_date) ? $interval	$date = (!$due_date \|\| $interval < $due_date) ? $interval
: $due_date;	: $due_date;
} else {	} else {
Line 4025 sub duedate {	Line 5160 sub duedate {
} else {	} else {
$date = $due_date;	$date = $due_date;
}	}
	$self->{DUEDATE_CACHE}->{$part} = $date;
return $date;	return $date;
}	}
sub handgrade {	sub handgrade {
Line 4086 sub weight {	Line 5222 sub weight {
my $self = shift; my $part = shift;	my $self = shift; my $part = shift;
if (!defined($part)) { $part = '0'; }	if (!defined($part)) { $part = '0'; }
my $weight = &Apache::lonnet::EXT('resource.'.$part.'.weight',	my $weight = &Apache::lonnet::EXT('resource.'.$part.'.weight',
$self->symb(), $env{'user.domain'},	$self->{SYMB}, $self->{DOMAIN},
$env{'user.name'},	$self->{USERNAME},
$env{'request.course.sec'});	$env{'request.course.sec'});
return $weight;	return $weight;
}	}
Line 4095 sub part_display {	Line 5231 sub part_display {
my $self= shift(); my $partID = shift();	my $self= shift(); my $partID = shift();
if (! defined($partID)) { $partID = '0'; }	if (! defined($partID)) { $partID = '0'; }
my $display=&Apache::lonnet::EXT('resource.'.$partID.'.display',	my $display=&Apache::lonnet::EXT('resource.'.$partID.'.display',
$self->symb);	$self->{SYMB});
if (! defined($display) \|\| $display eq '') {	if (! defined($display) \|\| $display eq '') {
$display = $partID;	$display = $partID;
}	}
Line 4106 sub slot_control {	Line 5242 sub slot_control {
if (!defined($part)) { $part = '0'; }	if (!defined($part)) { $part = '0'; }
my $useslots = $self->parmval("useslots", $part);	my $useslots = $self->parmval("useslots", $part);
my $availablestudent = $self->parmval("availablestudent", $part);	my $availablestudent = $self->parmval("availablestudent", $part);
my $available = $self->parmval("available", $part);	my $available = $self->parmval("available", $part);
return ($useslots,$availablestudent,$available);	return ($useslots,$availablestudent,$available);
}	}
	sub deeplink {
	my ($self,$caller,$action) = @_;
	my $deeplink = $self->parmval("deeplink");
	if ($deeplink) {
	my ($state,$others,$listed,$scope) = split(/,/,$deeplink);
	if ($action eq 'getlisted') {
	return $listed;
	}
	if ($env{'request.deeplink.login'}) {
	my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
	my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
	my $deeplink_symb = &Apache::loncommon::deeplink_login_symb($cnum,$cdom);
	if ($deeplink_symb) {
	my ($loginmap,$mapname);
	if ($deeplink_symb =~ /\.(page\|sequence)$/) {
	$mapname = $self->enclosing_map_src();
	$loginmap = &Apache::lonnet::clutter((&Apache::lonnet::decode_symb($deeplink_symb))[2]);
	return if ($mapname eq $loginmap);
	} else {
	return if ($deeplink_symb eq $self->symb());
	if (($scope eq 'map') \|\| ($scope eq 'rec')) {
	$mapname = $self->enclosing_map_src();
	$loginmap = &Apache::lonnet::clutter((&Apache::lonnet::decode_symb($deeplink_symb))[0]);
	return if ($mapname eq $loginmap);
	}
	}
	if ($scope eq 'rec') {
	my $map_pc = $self->navHash('map_pc_'.$mapname);
	my @recurseup = split(/,/,$self->navHash('map_hierarchy_'.$map_pc));
	my $login_pc = $self->navHash('map_pc_'.$loginmap);
	return if (grep(/^\Q$login_pc\E$/,@recurseup));
	}
	}
	}
	unless (($caller eq 'sequence') \|\| ($state eq 'both')) {
	return $listed;
	}
	}
	return;
	}

# Multiple things need this	# Multiple things need this
sub getReturnHash {	sub getReturnHash {
my $self = shift;	my $self = shift;

if (!defined($self->{RETURN_HASH})) {	if (!defined($self->{RETURN_HASH})) {
my %tmpHash = &Apache::lonnet::restore($self->symb());	#my %tmpHash = &Apache::lonnet::restore($self->{SYMB},undef,$self->{DOMAIN},$self->{USERNAME});
$self->{RETURN_HASH} = \%tmpHash;	#$self->{RETURN_HASH} = \%tmpHash;
	# When info is retrieved for several resources (as when rendering a directory),
	# it is much faster to use the user profile dump and avoid repeated lonnet requests
	# (especially since lonnet::currentdump is using Lond directly whenever possible,
	# and lonnet::restore is not at this point).
	$self->{NAV_MAP}->get_user_data();
	$self->{RETURN_HASH} = $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}};
}	}
}	}

Line 4180 and use the link as appropriate.	Line 5362 and use the link as appropriate.

sub hasDiscussion {	sub hasDiscussion {
my $self = shift;	my $self = shift;
return $self->{NAV_MAP}->hasDiscussion($self->symb());	return $self->{NAV_MAP}->hasDiscussion($self->{SYMB});
}	}

sub last_post_time {	sub last_post_time {
my $self = shift;	my $self = shift;
return $self->{NAV_MAP}->last_post_time($self->symb());	return $self->{NAV_MAP}->last_post_time($self->{SYMB});
}	}

sub discussion_info {	sub discussion_info {
my ($self,$filter) = @_;	my ($self,$filter) = @_;
return $self->{NAV_MAP}->discussion_info($self->symb(),$filter);	return $self->{NAV_MAP}->discussion_info($self->{SYMB},$filter);
}	}

sub getFeedback {	sub getFeedback {
my $self = shift;	my $self = shift;
my $source = $self->src();	my $source = $self->src();
my $symb = $self->symb();	my $symb = $self->{SYMB};
if ($source =~ /^\/res\//) { $source = substr $source, 5; }	if ($source =~ /^\/res\//) { $source = substr $source, 5; }
return $self->{NAV_MAP}->getFeedback($symb,$source);	return $self->{NAV_MAP}->getFeedback($symb,$source);
}	}
Line 4204 sub getFeedback {	Line 5386 sub getFeedback {
sub getErrors {	sub getErrors {
my $self = shift;	my $self = shift;
my $source = $self->src();	my $source = $self->src();
my $symb = $self->symb();	my $symb = $self->{SYMB};
if ($source =~ /^\/res\//) { $source = substr $source, 5; }	if ($source =~ /^\/res\//) { $source = substr $source, 5; }
return $self->{NAV_MAP}->getErrors($symb,$source);	return $self->{NAV_MAP}->getErrors($symb,$source);
}	}
Line 4257 sub parts {	Line 5439 sub parts {
my $self = shift;	my $self = shift;

if ($self->ext) { return []; }	if ($self->ext) { return []; }
	if (($self->is_tool()) &&
	($self->is_gradable())) { return ['0']; }

$self->extractParts();	$self->extractParts();
return $self->{PARTS};	return $self->{PARTS};
Line 4347 sub extractParts {	Line 5531 sub extractParts {
my %parts;	my %parts;

# Retrieve part count, if this is a problem	# Retrieve part count, if this is a problem
if ($self->is_problem()) {	if ($self->is_raw_problem()) {
my $partorder = &Apache::lonnet::metadata($self->src(), 'partorder');	my $partorder = &Apache::lonnet::metadata($self->src(), 'partorder');
my $metadata = &Apache::lonnet::metadata($self->src(), 'packages');	my $metadata = &Apache::lonnet::metadata($self->src(), 'packages');

if ($partorder) {	if ($partorder) {
my @parts;	my @parts;
for my $part (split (/,/,$partorder)) {	for my $part (split (/,/,$partorder)) {
if (!Apache::loncommon::check_if_partid_hidden($part, $self->symb())) {	if (!Apache::loncommon::check_if_partid_hidden($part, $self->{SYMB})) {
push @parts, $part;	push @parts, $part;
$parts{$part} = 1;	$parts{$part} = 1;
}	}
Line 4372 sub extractParts {	Line 5556 sub extractParts {
my $part = $1;	my $part = $1;
# This floods the logs if it blows up	# This floods the logs if it blows up
if (defined($parts{$part})) {	if (defined($parts{$part})) {
&Apache::lonnet::logthis("$part multiply defined in metadata for " . $self->symb());	&Apache::lonnet::logthis("$part multiply defined in metadata for " . $self->{SYMB});
}	}

# check to see if part is turned off.	# check to see if part is turned off.

if (!Apache::loncommon::check_if_partid_hidden($part, $self->symb())) {	if (!Apache::loncommon::check_if_partid_hidden($part, $self->{SYMB})) {
$parts{$part} = 1;	$parts{$part} = 1;
}	}
}	}
}	}
my @sortedParts = sort keys %parts;	my @sortedParts = sort(keys(%parts));
$self->{PARTS} = \@sortedParts;	$self->{PARTS} = \@sortedParts;
}	}

Line 4403 sub extractParts {	Line 5587 sub extractParts {
# So we have to use our knowlege of part names to figure out	# So we have to use our knowlege of part names to figure out
# where the part names begin and end, and even then, it is possible	# where the part names begin and end, and even then, it is possible
# to construct ambiguous situations.	# to construct ambiguous situations.
foreach my $data (split /,/, $metadata) {	foreach my $data (split(/,/, $metadata)) {
if ($data =~ /^([a-zA-Z]+)response_(.*)/	if ($data =~ /^([a-zA-Z]+)response_(.*)/
\|\| $data =~ /^(Task)_(.*)/) {	\|\| $data =~ /^(Task)_(.*)/) {
my $responseType = $1;	my $responseType = $1;
my $partStuff = $2;	my $partStuff = $2;
my $partIdSoFar = '';	my $partIdSoFar = '';
my @partChunks = split /_/, $partStuff;	my @partChunks = split(/_/, $partStuff);
my $i = 0;	my $i = 0;
for ($i = 0; $i < scalar(@partChunks); $i++) {	for ($i = 0; $i < scalar(@partChunks); $i++) {
if ($partIdSoFar) { $partIdSoFar .= '_'; }	if ($partIdSoFar) { $partIdSoFar .= '_'; }
Line 4541 sub OPEN { return 1; }	Line 5725 sub OPEN { return 1; }
sub PAST_DUE_NO_ANSWER { return 2; }	sub PAST_DUE_NO_ANSWER { return 2; }
sub PAST_DUE_ANSWER_LATER { return 3; }	sub PAST_DUE_ANSWER_LATER { return 3; }
sub ANSWER_OPEN { return 4; }	sub ANSWER_OPEN { return 4; }
sub NOTHING_SET { return 5; }	sub NOTHING_SET { return 5; }
sub NETWORK_FAILURE { return 100; }	sub NETWORK_FAILURE { return 100; }

# getDateStatus gets the date status for a given problem part.	# getDateStatus gets the date status for a given problem part.
Line 4627 Information not available due to network	Line 5811 Information not available due to network

Attempted, and not yet graded.	Attempted, and not yet graded.

	=item * B<CREDIT_ATTEMPTED>:

	Attempted, and credit received for attempt (survey and anonymous survey only).

	=item * B<INCORRECT_BY_PASSBACK>:

	Attempted, but wrong for LTI Tool Provider by passback of grade

	=item * B<CORRECT_BY_PASSBACK>:

	Correct for LTI Tool Provider by passback of grade

=back	=back

=cut	=cut
Line 4638 sub CORRECT { return 13; }	Line 5834 sub CORRECT { return 13; }
sub CORRECT_BY_OVERRIDE { return 14; }	sub CORRECT_BY_OVERRIDE { return 14; }
sub EXCUSED { return 15; }	sub EXCUSED { return 15; }
sub ATTEMPTED { return 16; }	sub ATTEMPTED { return 16; }
	sub CREDIT_ATTEMPTED { return 17; }
	sub INCORRECT_BY_PASSBACK { return 18; }
	sub CORRECT_BY_PASSBACK { return 19; }

sub getCompletionStatus {	sub getCompletionStatus {
my $self = shift;	my $self = shift;
Line 4652 sub getCompletionStatus {	Line 5851 sub getCompletionStatus {
if ($status eq 'correct_by_override') {	if ($status eq 'correct_by_override') {
return $self->CORRECT_BY_OVERRIDE;	return $self->CORRECT_BY_OVERRIDE;
}	}
	if ($status eq 'correct_by_passback') {
	return $self->CORRECT_BY_PASSBACK;
	}
if ($status eq 'incorrect_attempted') {return $self->INCORRECT; }	if ($status eq 'incorrect_attempted') {return $self->INCORRECT; }
if ($status eq 'incorrect_by_override') {return $self->INCORRECT_BY_OVERRIDE; }	if ($status eq 'incorrect_by_override') {return $self->INCORRECT_BY_OVERRIDE; }
	if ($status eq 'incorrect_by_passback') {return $self->INCORRECT_BY_PASSBACK; }
if ($status eq 'excused') {return $self->EXCUSED; }	if ($status eq 'excused') {return $self->EXCUSED; }
if ($status eq 'ungraded_attempted') {return $self->ATTEMPTED; }	if ($status eq 'ungraded_attempted') {return $self->ATTEMPTED; }
	if ($status eq 'credit_attempted') {
	if ($self->is_anonsurvey($part) \|\| $self->is_survey($part)) {
	return $self->CREDIT_ATTEMPTED;
	} else {
	return $self->ATTEMPTED;
	}
	}
return $self->NOT_ATTEMPTED;	return $self->NOT_ATTEMPTED;
}	}

Line 4745 The item is open and not yet tried.	Line 5955 The item is open and not yet tried.

The problem has been attempted.	The problem has been attempted.

	=item * B<CREDIT_ATTEMPTED>:

	The problem has been attempted, and credit given for the attempt (survey and anonymous survey only).

=item * B<ANSWER_SUBMITTED>:	=item * B<ANSWER_SUBMITTED>:

An answer has been submitted, but the student should not see it.	An answer has been submitted, but the student should not see it.
Line 4753 An answer has been submitted, but the st	Line 5967 An answer has been submitted, but the st

=cut	=cut

sub TRIES_LEFT { return 20; }	sub TRIES_LEFT { return 20; }
sub ANSWER_SUBMITTED { return 21; }	sub ANSWER_SUBMITTED { return 21; }
sub PARTIALLY_CORRECT{ return 22; }	sub PARTIALLY_CORRECT { return 22; }

sub RESERVED_LATER { return 30; }	sub RESERVED_LATER { return 30; }
sub RESERVED { return 31; }	sub RESERVED { return 31; }
Line 4796 sub status {	Line 6010 sub status {

# There are a few whole rows we can dispose of:	# There are a few whole rows we can dispose of:
if ($completionStatus == CORRECT \|\|	if ($completionStatus == CORRECT \|\|
$completionStatus == CORRECT_BY_OVERRIDE ) {	$completionStatus == CORRECT_BY_OVERRIDE \|\|
	$completionStatus == CORRECT_BY_PASSBACK ) {
if ( $suppressFeedback ) { return ANSWER_SUBMITTED }	if ( $suppressFeedback ) { return ANSWER_SUBMITTED }
my $awarded=$self->awarded($part);	my $awarded=$self->awarded($part);
if ($awarded < 1 && $awarded > 0) {	if ($awarded < 1 && $awarded > 0) {
Line 4809 sub status {	Line 6024 sub status {

# If it's WRONG... and not open	# If it's WRONG... and not open
if ( ($completionStatus == INCORRECT \|\|	if ( ($completionStatus == INCORRECT \|\|
$completionStatus == INCORRECT_BY_OVERRIDE)	$completionStatus == INCORRECT_BY_OVERRIDE \|\|
	$completionStatus == INCORRECT_BY_PASSBACK)
&& (!$self->opendate($part) \|\| $self->opendate($part) > time()) ) {	&& (!$self->opendate($part) \|\| $self->opendate($part) > time()) ) {
return INCORRECT;	return INCORRECT;
}	}
Line 4818 sub status {	Line 6034 sub status {
return ATTEMPTED;	return ATTEMPTED;
}	}

	if ($completionStatus == CREDIT_ATTEMPTED) {
	return CREDIT_ATTEMPTED;
	}

# If it's EXCUSED, then return that no matter what	# If it's EXCUSED, then return that no matter what
if ($completionStatus == EXCUSED) {	if ($completionStatus == EXCUSED) {
return EXCUSED;	return EXCUSED;
Line 4847 sub status {	Line 6067 sub status {
}	}

# If it's WRONG...	# If it's WRONG...
if ($completionStatus == INCORRECT \|\| $completionStatus == INCORRECT_BY_OVERRIDE) {	if ($completionStatus == INCORRECT \|\| $completionStatus == INCORRECT_BY_OVERRIDE \|\|
	$completionStatus == INCORRECT_BY_PASSBACK) {
# and there are TRIES LEFT:	# and there are TRIES LEFT:
if ($self->tries($part) < $self->maxtries($part) \|\| !$self->maxtries($part)) {	if ($self->tries($part) < $self->maxtries($part) \|\| !$self->maxtries($part)) {
return $suppressFeedback ? ANSWER_SUBMITTED : TRIES_LEFT;	return $suppressFeedback ? ANSWER_SUBMITTED : TRIES_LEFT;
Line 4856 sub status {	Line 6077 sub status {
}	}

# Otherwise, it's untried and open	# Otherwise, it's untried and open
return OPEN;	return OPEN;
}	}

sub check_for_slot {	sub check_for_slot {
my $self = shift;	my $self = shift;
my $part = shift;	my $part = shift;
	my $symb = $self->{SYMB};
my ($use_slots,$available,$availablestudent) = $self->slot_control($part);	my ($use_slots,$available,$availablestudent) = $self->slot_control($part);
if (($use_slots ne '') && ($use_slots !~ /^\sno\s$/i)) {	if (($use_slots ne '') && ($use_slots !~ /^\sno\s$/i)) {
my @slots = (split(/:/,$availablestudent),split(/:/,$available));	my @slots = (split(/:/,$availablestudent),split(/:/,$available));
Line 4869 sub check_for_slot {	Line 6091 sub check_for_slot {
my $cdom=$env{'course.'.$cid.'.domain'};	my $cdom=$env{'course.'.$cid.'.domain'};
my $cnum=$env{'course.'.$cid.'.num'};	my $cnum=$env{'course.'.$cid.'.num'};
my $now = time;	my $now = time;
	my $num_usable_slots = 0;
	my ($checkedin,$checkedinslot,%consumed_uniq,%slots);
if (@slots > 0) {	if (@slots > 0) {
my %slots=&Apache::lonnet::get('slots',[@slots],$cdom,$cnum);	%slots=&Apache::lonnet::get('slots',[@slots],$cdom,$cnum);
if (&Apache::lonnet::error(%slots)) {	if (&Apache::lonnet::error(%slots)) {
return (UNKNOWN);	return (UNKNOWN);
}	}
my @sorted_slots = &Apache::loncommon::sorted_slots(\@slots,\%slots);	my @sorted_slots = &Apache::loncommon::sorted_slots(\@slots,\%slots,'starttime');
my ($checkedin,$checkedinslot);
foreach my $slot_name (@sorted_slots) {	foreach my $slot_name (@sorted_slots) {
next if (!defined($slots{$slot_name}) \|\|	next if (!defined($slots{$slot_name}) \|\| !ref($slots{$slot_name}));
!ref($slots{$slot_name}));
my $end = $slots{$slot_name}->{'endtime'};	my $end = $slots{$slot_name}->{'endtime'};
my $start = $slots{$slot_name}->{'starttime'};	my $start = $slots{$slot_name}->{'starttime'};
my $ip = $slots{$slot_name}->{'ip'};	my $ip = $slots{$slot_name}->{'ip'};
if ($self->simpleStatus() == OPEN) {	if ($self->simpleStatus() == OPEN) {
my $startreserve = $slots{$slot_name}->{'startreserve'};
my @proctors;
if ($slots{$slot_name}->{'proctor'} ne '') {
@proctors = split(',',$slots{$slot_name}->{'proctor'});
}
if ($end > $now) {	if ($end > $now) {
($checkedin,$checkedinslot) = $self->checkedin();	if ($start > $now) {
if ($startreserve < $now) {	return (RESERVED_LATER,$start,$slot_name);
if ($start > $now) {	} else {
return (RESERVED_LATER,$start,$slot_name);	if ($ip ne '') {
} else {	if (!&Apache::loncommon::check_ip_acc($ip)) {
if ($ip ne '') {	return (RESERVED_LOCATION,$end,$slot_name);
if (!&Apache::loncommon::check_ip_acc($ip)) {
return (RESERVED_LOCATION,$ip,$slot_name);
}
}	}
if (@proctors > 0) {	}
unless ((grep(/^\Q$checkedin\E/,@proctors)) &&	my @proctors;
	if ($slots{$slot_name}->{'proctor'} ne '') {
	@proctors = split(',',$slots{$slot_name}->{'proctor'});
	}
	if (@proctors > 0) {
	($checkedin,$checkedinslot) = $self->checkedin();
	unless ((grep(/^\Q$checkedin\E/,@proctors)) &&
($checkedinslot eq $slot_name)) {	($checkedinslot eq $slot_name)) {
return (NEEDS_CHECKIN,undef,$slot_name);	return (NEEDS_CHECKIN,$end,$slot_name);
}
}	}
return (RESERVED,$end,$slot_name);
}
} else {
if ($start > $now) {
return (RESERVABLE,$startreserve,$slot_name);
}	}
	return (RESERVED,$end,$slot_name);
}	}
}	}
	} elsif ($end > $now) {
	$num_usable_slots ++;
}	}
}	}
my ($is_correct,$got_grade);	my ($is_correct,$wait_for_grade);
if ($self->is_task()) {	if ($self->is_task()) {
my $taskstatus = $self->taskstatus();	my $taskstatus = $self->taskstatus();
$is_correct = (($taskstatus eq 'pass') \|\|	$is_correct = (($taskstatus eq 'pass') \|\|
($self->solved() =~ /^correct_/));	($self->solved() =~ /^correct_/));
$got_grade = ($self->solved() =~ /^(?:pass\|fail)$/);	unless ($taskstatus =~ /^(?:pass\|fail)$/) {
	$wait_for_grade = 1;
	}
} else {	} else {
$got_grade = 1;	unless ($self->completable()) {
$is_correct = ($self->solved() =~ /^correct_/);	$wait_for_grade = 1;
	}
	unless (($self->problemstatus($part) eq 'no') \|\|
	($self->problemstatus($part) eq 'no_feedback_ever')) {
	$is_correct = ($self->solved($part) =~ /^correct_/);
	$wait_for_grade = 0;
	}
}	}
($checkedin,$checkedinslot) = $self->checkedin();	($checkedin,$checkedinslot) = $self->checkedin();
if ($checkedin) {	if ($checkedin) {
if (!$got_grade) {	if (ref($slots{$checkedinslot}) eq 'HASH') {
	$consumed_uniq{$checkedinslot} = $slots{$checkedinslot}{'uniqueperiod'};
	}
	if ($wait_for_grade) {
return (WAITING_FOR_GRADE);	return (WAITING_FOR_GRADE);
} elsif ($is_correct) {	} elsif ($is_correct) {
return (CORRECT);	return (CORRECT);
}	}
}	}
return(NOT_IN_A_SLOT);	if ($num_usable_slots) {
} else {
if (!$future_slots_checked) {
$future_slots = &get_future_slots($cdom,$cnum,$now);
$future_slots_checked = 1;
}
if ($future_slots) {
return(NOT_IN_A_SLOT);	return(NOT_IN_A_SLOT);
}	}
return(NOTRESERVABLE);
}	}
}	my $reservable = &Apache::lonnet::get_reservable_slots($cnum,$cdom,$env{'user.name'},
return;	$env{'user.domain'});
}	if (ref($reservable) eq 'HASH') {
	my ($map) = &Apache::lonnet::decode_symb($symb);
sub get_future_slots {	if ((ref($reservable->{'now_order'}) eq 'ARRAY') && (ref($reservable->{'now'}) eq 'HASH')) {
my ($cdom,$cnum,$now) = @_;	foreach my $slot (reverse (@{$reservable->{'now_order'}})) {
my %slots=&Apache::lonnet::dump('slots',$cdom,$cnum);	my $canuse;
my $future_slots = 0;	if ($reservable->{'now'}{$slot}{'symb'} eq '') {
foreach my $slot (keys(%slots)) {	$canuse = 1;
if (($slots{$slot}->{'starttime'} > $now) &&	} else {
($slots{$slot}->{'endtime'} > $now)) {	my %oksymbs;
$future_slots ++;	my @slotsymbs = split(/\s,\s/,$reservable->{'now'}{$slot}{'symb'});
	map { $oksymbs{$_} = 1; } @slotsymbs;
	if ($oksymbs{$symb}) {
	$canuse = 1;
	} else {
	foreach my $item (@slotsymbs) {
	if ($item =~ /\.(page\|sequence)$/) {
	(undef,undef, my $sloturl) = &Apache::lonnet::decode_symb($item);
	if (($map ne '') && ($map eq $sloturl)) {
	$canuse = 1;
	last;
	}
	}
	}
	}
	}
	if ($canuse) {
	if ($checkedin) {
	if (ref($consumed_uniq{$checkedinslot}) eq 'ARRAY') {
	my ($uniqstart,$uniqend)=@{$consumed_uniq{$checkedinslot}};
	if ($reservable->{'now'}{$slot}{'uniqueperiod'} =~ /^(\d+),(\d+)$/) {
	my ($new_uniq_start,$new_uniq_end) = ($1,$2);
	next if (!
	($uniqstart < $new_uniq_start && $uniqend < $new_uniq_start) \|\|
	($uniqstart > $new_uniq_end && $uniqend > $new_uniq_end ));
	}
	}
	}
	return(RESERVABLE,$reservable->{'now'}{$slot}{'endreserve'});
	}
	}
	}
	if ((ref($reservable->{'future_order'}) eq 'ARRAY') && (ref($reservable->{'future'}) eq 'HASH')) {
	foreach my $slot (@{$reservable->{'future_order'}}) {
	my $canuse;
	if ($reservable->{'future'}{$slot}{'symb'} eq '') {
	$canuse = 1;
	} elsif ($reservable->{'future'}{$slot}{'symb'} =~ /,/) {
	my %oksymbs;
	my @slotsymbs = split(/\s,\s/,$reservable->{'future'}{$slot}{'symb'});
	map { $oksymbs{$_} = 1; } @slotsymbs;
	if ($oksymbs{$symb}) {
	$canuse = 1;
	} else {
	foreach my $item (@slotsymbs) {
	if ($item =~ /\.(page\|sequence)$/) {
	(undef,undef, my $sloturl) = &Apache::lonnet::decode_symb($item);
	if (($map ne '') && ($map eq $sloturl)) {
	$canuse = 1;
	last;
	}
	}
	}
	}
	} elsif ($reservable->{'future'}{$slot}{'symb'} eq $symb) {
	$canuse = 1;
	}
	if ($canuse) {
	if ($checkedin) {
	if (ref($consumed_uniq{$checkedinslot}) eq 'ARRAY') {
	my ($uniqstart,$uniqend)=@{$consumed_uniq{$checkedinslot}};
	if ($reservable->{'future'}{$slot}{'uniqueperiod'} =~ /^(\d+),(\d+)$/) {
	my ($new_uniq_start,$new_uniq_end) = ($1,$2);
	next if (!
	($uniqstart < $new_uniq_start && $uniqend < $new_uniq_start) \|\|
	($uniqstart > $new_uniq_end && $uniqend > $new_uniq_end ));
	}
	}
	}
	return(RESERVABLE_LATER,$reservable->{'future'}{$slot}{'startreserve'});
	}
	}
	}
}	}
	return(NOTRESERVABLE);
}	}
return $future_slots;	return;
}	}

sub CLOSED { return 23; }	sub CLOSED { return 23; }
Line 5010 my %compositeToSimple =	Line 6304 my %compositeToSimple =
INCORRECT() => INCORRECT,	INCORRECT() => INCORRECT,
OPEN() => OPEN,	OPEN() => OPEN,
ATTEMPTED() => ATTEMPTED,	ATTEMPTED() => ATTEMPTED,
	CREDIT_ATTEMPTED() => CORRECT,
ANSWER_SUBMITTED() => ATTEMPTED	ANSWER_SUBMITTED() => ATTEMPTED
);	);

Line 5084 sub completable {	Line 6379 sub completable {
# and it is not "attempted" (manually graded problem), it is	# and it is not "attempted" (manually graded problem), it is
# not "complete"	# not "complete"
if ($self->getCompletionStatus($part) == ATTEMPTED() \|\|	if ($self->getCompletionStatus($part) == ATTEMPTED() \|\|
	$self->getCompletionStatus($part) == CREDIT_ATTEMPTED() \|\|
$status == ANSWER_SUBMITTED() ) {	$status == ANSWER_SUBMITTED() ) {
# did this part already, as well as we can	# did this part already, as well as we can
next;	next;
Line 5099 sub completable {	Line 6395 sub completable {

=pod	=pod

	B<Answerable>

	The answerable method differs from the completable method in its handling of problem parts
	for which feedback on correctness is suppressed, but the student still has tries left, and
	the problem part is not past due, (i.e., the student could submit a different answer if
	he/she so chose). For that case completable will return 0, whereas answerable will return 1.

	=cut

	sub answerable {
	my $self = shift;
	if (!$self->is_problem()) { return 0; }
	my $partCount = $self->countParts();
	foreach my $part (@{$self->parts()}) {
	if ($part eq '0' && $partCount != 1) { next; }
	my $status = $self->status($part);
	if ($self->getCompletionStatus($part) == ATTEMPTED() \|\|
	$self->getCompletionStatus($part) == CREDIT_ATTEMPTED() \|\|
	$status == ANSWER_SUBMITTED() ) {
	if ($self->tries($part) < $self->maxtries($part) \|\| !$self->maxtries($part)) {
	return 1;
	}
	}
	if ($status == OPEN() \|\| $status == TRIES_LEFT() \|\| $status == NETWORK_FAILURE()) {
	return 1;
	}
	}
	# None of the parts were answerable, so neither is this problem.
	return 0;
	}

	=pod

=head2 Resource/Nav Map Navigation	=head2 Resource/Nav Map Navigation

=over 4	=over 4
Line 5134 sub getPrevious {	Line 6463 sub getPrevious {
my $self = shift;	my $self = shift;
my @branches;	my @branches;
my $from = $self->from();	my $from = $self->from();
foreach my $branch ( split /,/, $from) {	foreach my $branch ( split(/,/, $from)) {
my $choice = $self->{NAV_MAP}->getById($branch);	my $choice = $self->{NAV_MAP}->getById($branch);
my $prev = $choice->comesfrom();	my $prev = $choice->comesfrom();
$prev = $self->{NAV_MAP}->getById($prev);	$prev = $self->{NAV_MAP}->getById($prev);
Line 5146 sub getPrevious {	Line 6475 sub getPrevious {

sub browsePriv {	sub browsePriv {
my $self = shift;	my $self = shift;
	my $noblockcheck = shift;
	my $deeplinklisted = shift;
if (defined($self->{BROWSE_PRIV})) {	if (defined($self->{BROWSE_PRIV})) {
return $self->{BROWSE_PRIV};	return $self->{BROWSE_PRIV};
}	}
	my ($nodeeplinkcheck,$nodeeplinkout);
	if ($deeplinklisted) {
	my $deeplink = $self->deeplink(undef,'getlisted');
	if (($deeplink) && ($deeplink ne 'absent')) {
	$nodeeplinkcheck = 1;
	}
	$nodeeplinkout = 1;
	}
$self->{BROWSE_PRIV} = &Apache::lonnet::allowed('bre',$self->src(),	$self->{BROWSE_PRIV} = &Apache::lonnet::allowed('bre',$self->src(),
$self->symb());	$self->{SYMB},undef,
	undef,$noblockcheck,
	undef,$nodeeplinkcheck,
	$nodeeplinkout);
}	}

=pod	=pod

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>

Removed from v.1.423.2.1
changed lines
	Added in v.1.560