--- loncom/interface/lonnavmaps.pm	2002/10/11 21:29:18	1.74
+++ loncom/interface/lonnavmaps.pm	2002/10/24 19:10:07	1.86
@@ -2,7 +2,7 @@
 # The LearningOnline Network with CAPA
 # Navigate Maps Handler
 #
-# $Id: lonnavmaps.pm,v 1.74 2002/10/11 21:29:18 bowersj2 Exp $
+# $Id: lonnavmaps.pm,v 1.86 2002/10/24 19:10:07 bowersj2 Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -823,7 +823,7 @@ sub new_handle {
     # Initialize the nav map
     my $navmap = Apache::lonnavmaps::navmap->new(
                         $ENV{"request.course.fn"}.".db",
-                        $ENV{"request.course.fn"}."_parms.db", 1);
+                        $ENV{"request.course.fn"}."_parms.db", 1, 1);
 
 
     if (!defined($navmap)) {
@@ -849,10 +849,6 @@ sub new_handle {
         $r->print('<img src="/adm/lonMisc/chat.gif"> Discussions'.
                   '<br><img src="/adm/lonMisc/feedback.gif"> New message (click to open)<p>'); 
     }
-    #if (($currenturl=~/^\/res/) &&
-    #    ($currenturl!~/^\/res\/adm/)) {
-    #    $r->print('<a href="#curloc">Current Location</a><p>');
-    #}
 
     # Check that it's defined
     if (!($navmap->courseMapDefined())) {
@@ -880,7 +876,7 @@ sub new_handle {
       $res->NOTHING_SET            => ''        );
     # And a special case in the nav map; what to do when the assignment
     # is not yet done and due in less then 24 hours
-    my $hurryUpColor = "#FFCCCC";
+    my $hurryUpColor = "#FF0000";
 
     my %statusIconMap = 
         ( $res->NETWORK_FAILURE    => '',
@@ -894,7 +890,7 @@ sub new_handle {
           $res->TRIES_LEFT         => 'navmap.open.gif',
           $res->INCORRECT          => 'navmap.wrong.gif',
           $res->OPEN               => 'navmap.open.gif',
-          $res->ATTEMPTED          => '' );
+          $res->ATTEMPTED          => 'navmap.open.gif' );
 
     my %iconAltTags = 
         ( 'navmap.correct.gif' => 'Correct',
@@ -917,13 +913,19 @@ sub new_handle {
     my $currenturl = $ENV{'form.postdata'};
     $currenturl=~s/^http\:\/\///;
     $currenturl=~s/^[^\/]+//;
-    my $queryAdd = "postdata=" . &Apache::lonnet::escape($currenturl);
+    # alreadyHere allows us to only open the maps necessary to view
+    # the current location once, while at the same time remembering
+    # the current location. Without that check, the user would never
+    # be able to close those maps; the user would close it, and the
+    # currenturl scan would re-open it.
+    my $queryAdd = "postdata=" . &Apache::lonnet::escape($currenturl) .
+        "&alreadyHere=1";
 
     $r->print('<a href="navmaps?condition=1&filter=">Show All Resources</a><br /><br />');
 
     # Begin the HTML table
     # four cols: resource + indent, chat+feedback, icon, text string
-    $r->print('<table cellspacing="3" cellpadding="0" bgcolor="#FFFFFF">' ."\n");
+    $r->print('<table cellspacing="0" cellpadding="3" border="0" bgcolor="#FFFFFF">' ."\n");
 
     my $condition = 0;
     if ($ENV{'form.condition'}) {
@@ -935,10 +937,10 @@ sub new_handle {
     # loop should be obvious.
     # Here's a simple example of the iterator.
     # If there is a current resource
-    if ($currenturl) {
+    if ($currenturl && !$ENV{'form.alreadyHere'}) {
         # Give me every resource...
         my $mapIterator = $navmap->getIterator(undef, undef, {}, 1);
-        my $found != 0;
+        my $found = 0;
         my $depth = 1;
         $mapIterator->next(); # discard the first BEGIN_MAP
         my $curRes = $mapIterator->next();
@@ -971,6 +973,7 @@ sub new_handle {
     my $now = time();
     my $in24Hours = $now + 24 * 60 * 60;
     my $depth = 1;
+    my $displayedHereMarker = 0;
 
     # We know the first thing is a BEGIN_MAP (see "$self->{STARTED}"
     # code in iterator->next), so ignore the first one
@@ -1068,9 +1071,16 @@ sub new_handle {
                 }
 
             } else {
-                @parts[0] = "0"; # this is to get past foreach loop below
+                $parts[0] = "0"; # this is to get past foreach loop below
                  # you can consider a non-problem resource as a resource
-                 # with only one part without loss
+                  # with only one part without loss
+            }
+
+            # Is it a multipart problem with a single part, now in 
+            # @parts with "0" filtered out? If so, forget it's a multi-part
+            # problem and treat it like a single-part problem.
+            if ( scalar(@parts) == 1 ) {
+                $multipart = 0;
             }
 
             # Display one part, in event of network error.
@@ -1097,6 +1107,10 @@ sub new_handle {
                     'symb='.&Apache::lonnet::escape($curRes->symb()).
                     '"';
                 my $title = $curRes->title();
+                if (!$title) {
+                    $title = $curRes->src();
+                    $title = substr ($title, rindex($title, "/") + 1);
+                }
                 my $partLabel = "";
                 my $newBranchText = "";
 
@@ -1124,9 +1138,10 @@ sub new_handle {
                 # Display the correct icon, link to open or shut map
                 if ($curRes->is_map()) { 
                     my $mapId = $curRes->map_pc();
-                    my $nowOpen = !defined($filterHash{$mapId});
+                    my $nowOpen = (!defined($filterHash{$mapId}));
+                    if ($condition) {$nowOpen = !$nowOpen;}
                     $icon = $nowOpen ?
-                        "folder_closed.gif" : "folder_opened.gif";
+                        "navmap.folder.closed.gif" : "navmap.folder.open.gif";
                     $icon = "<img src=\"/adm/lonIcons/$icon\" alt=\"\" border=\"0\" />";
                     $linkopen = "<a href=\"/adm/navmaps?filter=";
                     $linkopen .= ($nowOpen xor $condition) ? 
@@ -1138,14 +1153,26 @@ sub new_handle {
                 }
                 
                 my $colorizer = "";
+                my $color;
                 if ($curRes->is_problem()) {
                     my $status = $curRes->status($part);
-                    my $color = $colormap{$status};
+                    $color = $colormap{$status};
 
                     # Special case in the navmaps: If in less then
                     # 24 hours, give it a bit of urgency
-                    if ($status == $curRes->OPEN() &&
-                        $curRes->duedate() < time()+(24*60*60)) {
+                    if (($status == $curRes->OPEN() || $status == $curRes->ATTEMPTED() ||
+                         $status == $curRes->TRIES_LEFT())
+                        && $curRes->duedate() &&
+                        $curRes->duedate() < time()+(24*60*60) && 
+                        $curRes->duedate() > time()) {
+                        $color = $hurryUpColor;
+                    }
+                    # Special case: If this is the last try, and there is
+                    # more then one available, give a bit of urgency
+                    my $tries = $curRes->tries($part);
+                    my $maxtries = $curRes->maxtries($part);
+                    if ($tries && $maxtries && $maxtries > 1 &&
+                        $maxtries - $tries == 1) {
                         $color = $hurryUpColor;
                     }
                     if ($color ne "") {
@@ -1158,7 +1185,7 @@ sub new_handle {
                 }
 
                 # FIRST COL: The resource indentation, branch icon, and name
-                $r->print("  <tr><td align=\"left\" valign=\"bottom\">\n");
+                $r->print("  <tr><td align=\"left\" valign=\"center\" width=\"60%\">\n");
 
                 # print indentation
                 for (my $i = 0; $i < $indentLevel - $deltalevel; $i++) {
@@ -1171,9 +1198,10 @@ sub new_handle {
                 my $curMarkerEnd = "";
 
                 # Is this the current resource?
-                if ($curRes->src() eq $currenturl) {
+                if ($curRes->src() eq $currenturl && !$displayedHereMarker) {
                     $curMarkerBegin = '<a name="curloc" /><font color="red" size="+2">&gt; </font>';
                     $curMarkerEnd = '<font color="red" size="+2"> &lt;</font>';
+                    $displayedHereMarker = 1;
                 }
 
                 if ($curRes->is_problem() && $part ne "0" && !$condensed) { 
@@ -1188,12 +1216,12 @@ sub new_handle {
 
                 if ($curRes->{RESOURCE_ERROR}) {
                     $r->print(&Apache::loncommon::help_open_topic ("Navmap_Host_Down",
-                                                  '<font size="-1">Host down</font>'));
+                                              '<font size="-1">Host down</font>'));
                     }
 
                 my $discussionHTML = ""; my $feedbackHTML = "";
 
-                # SECOND COL: Is there text or feedback?
+                # SECOND COL: Is there text, feedback, errors??
                 if ($curRes->hasDiscussion()) {
                     $discussionHTML = $linkopen .
                         '<img border="0" src="/adm/lonMisc/chat.gif" />' .
@@ -1212,7 +1240,7 @@ sub new_handle {
                     }
                 }
 
-                $r->print("<td align=\"left\" valign=\"bottom\">$discussionHTML$feedbackHTML</td>");
+                $r->print("<td width=\"75\" align=\"left\" valign=\"center\">$discussionHTML$feedbackHTML&nbsp;</td>");
 
                 # Is this the first displayed part of a multi-part problem
                 # that has not been condensed, so we should suppress these two
@@ -1225,27 +1253,30 @@ sub new_handle {
                     my $icon = $statusIconMap{$curRes->status($part)};
                     my $alt = $iconAltTags{$icon};
                     if ($icon) {
-                        $r->print("<td valign=\"bottom\" width=\"50\" align=\"right\">$linkopen<img src=\"/adm/lonIcons/$icon\" border=\"0\" alt=\"$alt\" />$linkclose</td>\n");
+                        $r->print("<td width=\"30\" valign=\"center\" width=\"50\" align=\"right\">$linkopen<img width=\"25\" height=\"25\" src=\"/adm/lonIcons/$icon\" border=\"0\" alt=\"$alt\" />$linkclose</td>\n");
                     } else {
-                        $r->print("<td></td>\n");
+                        $r->print("<td width=\"30\">&nbsp;</td>\n");
                     }
                 } else { # not problem, no icon
-                    $r->print("<td></td>\n");
+                    $r->print("<td width=\"30\">&nbsp;</td>\n");
                 }
 
                 # FOURTH COL: Text description
-                $r->print("<td $colorizer align=\"right\" valign=\"bottom\">\n");
+                #$r->print("<td $colorizer align=\"right\" valign=\"center\">\n");
+                $r->print("<td align=\"right\" valign=\"center\">\n");
                 
                 if ($curRes->kind() eq "res" &&
                     $curRes->is_problem() &&
                     !$firstDisplayed) {
+                    $r->print ("<font color=\"$color\"><b>") if ($color);
                     $r->print (getDescription($curRes, $part));
+                    $r->print ("</b></font>") if ($color);
                 }
                 if ($curRes->is_map() && advancedUser() && $curRes->randompick()) {
                     $r->print('(randomly select ' . $curRes->randompick() .')');
                 }
 
-                $r->print("</td></tr>\n");
+                $r->print("&nbsp;</td></tr>\n");
             }
         }
         $curRes = $mapIterator->next();
@@ -1323,7 +1354,7 @@ sub getDescription {
         return "Open " . timeToHumanString($res->opendate($part));
     }
     if ($status == $res->OPEN) {
-        if ($res->duedate()) {
+        if ($res->duedate($part)) {
             return "Due " . timeToHumanString($res->duedate($part));
         } else {
             return "Open, no due date";
@@ -1345,9 +1376,15 @@ sub getDescription {
         return "Not yet graded.";
     }
     if ($status == $res->TRIES_LEFT) {
-        my $tries = $res->tries();
-        my $maxtries = $res->maxtries();
-        my $triesString = "($tries of $maxtries tries used)";
+        my $tries = $res->tries($part);
+        my $maxtries = $res->maxtries($part);
+        my $triesString = "";
+        if ($tries && $maxtries) {
+            $triesString = "<font size=\"-1\"><i>($tries of $maxtries tries used)</i></font>";
+            if ($maxtries > 1 && $maxtries - $tries == 1) {
+                $triesString = "<b>$triesString</b>";
+            }
+        }
         if ($res->duedate()) {
             return "Due " . timeToHumanString($res->duedate($part)) .
                 " $triesString";
@@ -1442,7 +1479,7 @@ sub timeToHumanString {
         # Less then 5 days away, display day of the week and
         # HH:MM
         if ( $delta < $day * 5 ) {
-            my $timeStr = strftime("%A at %I:%M %P", localtime($time));
+            my $timeStr = strftime("%A, %b %e at %I:%M %P", localtime($time));
             $timeStr =~ s/12:00 am/midnight/;
             $timeStr =~ s/12:00 pm/noon/;
             return ($inPast ? "last " : "next ") .
@@ -1634,6 +1671,8 @@ sub new {
         $self->{EMAIL_STATUS} = \%emailstatus;
         
     }    
+
+    $self->{PARM_CACHE} = {};
     
     bless($self);
         
@@ -1755,6 +1794,21 @@ sub finishResource {
 sub parmval {
     my $self = shift;
     my ($what,$symb)=@_;
+    my $hashkey = $what."|||".$symb;
+
+    if (defined($self->{PARM_CACHE}->{$hashkey})) {
+        return $self->{PARM_CACHE}->{$hashkey};
+    }
+
+    my $result = $self->parmval_real($what, $symb);
+    $self->{PARM_CACHE}->{$hashkey} = $result;
+    return $result;
+}
+
+sub parmval_real {
+    my $self = shift;
+    my ($what,$symb) = @_;
+
     my $cid=$ENV{'request.course.id'};
     my $csec=$ENV{'request.course.sec'};
     my $uname=$ENV{'user.name'};
@@ -2216,15 +2270,15 @@ These are methods that help you retrieve
 
 =item * B<to>: Returns the "to" value from the compiled nav map. (It is likely you want to use B<getNext> instead.)
 
-=item * B<type>: Returns the type of the resource, "start", "normal", or "finish". 
-
 =back
 
 =cut
 
 # These info functions can be used directly, as they don't return
 # resource information.
+sub comesfrom { my $self=shift; return $self->navHash("comesfrom_", 1); }
 sub ext { my $self=shift; return $self->navHash("ext_", 1) eq 'true:'; }
+sub from { my $self=shift; return $self->navHash("from_", 1); }
 sub goesto { my $self=shift; return $self->navHash("goesto_", 1); }
 sub kind { my $self=shift; return $self->navHash("kind_", 1); }
 sub randomout { my $self=shift; return $self->navHash("randomout_", 1); }
@@ -2247,7 +2301,6 @@ sub symb {
 }
 sub title { my $self=shift; return $self->navHash("title_", 1); }
 sub to { my $self=shift; return $self->navHash("to_", 1); }
-sub type { my $self=shift; return $self->navHash("type_", 1); }
 
 =pod
 
@@ -2463,7 +2516,7 @@ sub getReturnHash {
     my $self = shift;
     
     if (!defined($self->{RETURN_HASH})) {
-        my %tmpHash = &Apache::lonnet::restore($self->symb());
+        my %tmpHash  = &Apache::lonnet::restore($self->symb());
         $self->{RETURN_HASH} = \%tmpHash;
     }
 }       
@@ -2509,7 +2562,7 @@ sub hasDiscussion {
 
 sub getFeedback {
     my $self = shift;
-    return $self->{NAV_MAP}->getFeedback($self->symb());
+    return $self->{NAV_MAP}->getFeedback($self->src());
 }
 
 =pod
@@ -2554,25 +2607,27 @@ sub extractParts {
 
     $self->{PARTS} = [];
 
-    # Retrieve part count
-    my $metadata = &Apache::lonnet::metadata($self->src(), 'allpossiblekeys');
-    if (!$metadata) {
-        $self->{RESOURCE_ERROR} = 1;
-        $self->{PARTS} = [];
-        return;
-    }
-
-    foreach (split(/\,/,$metadata)) {
-        if ($_ =~ /^parameter\_(.*)\_opendate$/) {
-            push @{$self->{PARTS}}, $1;
+    # Retrieve part count, if this is a problem
+    if ($self->is_problem()) {
+        my $metadata = &Apache::lonnet::metadata($self->src(), 'allpossiblekeys');
+        if (!$metadata) {
+            $self->{RESOURCE_ERROR} = 1;
+            $self->{PARTS} = [];
+            return;
+        }
+        
+        foreach (split(/\,/,$metadata)) {
+            if ($_ =~ /^parameter\_(.*)\_opendate$/) {
+                push @{$self->{PARTS}}, $1;
+            }
         }
+        
+        
+        # Is this possible to do in one line? - Jeremy
+        my @sortedParts = sort @{$self->{PARTS}};
+        $self->{PARTS} = \@sortedParts;
     }
 
-    
-    # Is this possible to do in one line? - Jeremy
-    my @sortedParts = sort @{$self->{PARTS}};
-    $self->{PARTS} = \@sortedParts;
-
     return;
 }
 
@@ -2821,7 +2876,7 @@ sub status {
     # If it's WRONG...
     if ($completionStatus == INCORRECT || $completionStatus == INCORRECT_BY_OVERRIDE) {
         # and there are TRIES LEFT:
-        if ($self->tries() < $self->maxtries()) {
+        if ($self->tries($part) < $self->maxtries($part) || !$self->maxtries($part)) {
             return TRIES_LEFT;
         }
         return INCORRECT; # otherwise, return orange; student can't fix this
@@ -2837,20 +2892,18 @@ sub status {
 
 =over 4
 
-=item * B<getNext>(): Gets the next resource in the navmap after this one.
+=item * B<getNext>($alreadySeenHashRef): Retreive an array of the possible next resources after this one. Always returns an array, even in the one- or zero-element case. The "alreadySeenHashRef" is an optional parameter that can be passed in to the method. If $$alreadySeenHashRef{$res->id()} is true in that hash, getNext will not return it in the list. In other words, you can use it to suppress resources you've already seen in the getNext method directly.
 
-=cut
+=item * B<getPrevious>($alreadySeenHashRef): Retreive an array of the possible previous resources from this one. Always returns an array, even in the one- or zero-element case. $alreadySeenHashRef is the same as in getNext.
 
-# For the simple single-link case, to get from a resource to the next
-# resource, you need to look up the "to_" link in the nav hash, then
-# follow that with the "goesto_" link.
+=cut
 
 sub getNext {
     my $self = shift;
     my $alreadySeenHash = shift;
     my @branches;
     my $to = $self->to();
-    foreach my $branch ( split(/\,/, $to) ) {
+    foreach my $branch ( split(/,/, $to) ) {
         my $choice = $self->{NAV_MAP}->getById($branch);
         my $next = $choice->goesto();
         $next = $self->{NAV_MAP}->getById($next);
@@ -2866,6 +2919,28 @@ sub getNext {
     }
     return \@branches;
 }
+
+sub getPrevious {
+    my $self = shift;
+    my @alreadySeen = shift;
+    my @branches;
+    my $from = $self->from();
+    foreach my $branch ( split /,/, $from) {
+        my $choice = $self->{NAV_MAP}->getById($branch);
+        my $prev = $choice->comesfrom();
+        $prev = $self->{NAV_MAP}->getById($prev);
+
+        # Skip it if we've already seen it or the user doesn't have
+        # browse privs
+        my $browsePriv = &Apache::lonnet::allowed('bre', $self->src);
+        if (!defined($alreadySeenHash) ||
+            !defined($alreadySeenHash->{$next->{ID}}) ||
+            ($browsePriv ne '2' && $browsePriv ne 'F')) {
+            push @branches, $next;
+        }
+    }
+    return \@branches;
+}
 
 =pod