version 1.1, 2001/01/03 16:20:59
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version 1.8, 2001/01/17 17:27:04
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# The LearningOnline Network |
# The LearningOnline Network with CAPA |
# Navigate Maps |
# Navigate Maps Handler |
# |
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# (Internal Server Error Handler |
# (Page Handler |
# |
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# (Login Screen |
# (TeX Content Handler |
# 5/21/99,5/22,5/25,5/26,5/31,6/2,6/10,7/12,7/14, |
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# 1/14/00,5/29,5/30,6/1,6/29,7/1,11/9 Gerd Kortemeyer) |
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# |
# |
# 3/1/1 Gerd Kortemeyer) |
# 05/29/00,05/30 Gerd Kortemeyer) |
# |
# 08/30,08/31,09/06,09/14,09/15,09/16,09/19,09/20,09/21,09/23, |
# 3/1 Gerd Kortemeyer |
# 10/02,10/10,10/14,10/16,10/18,10/19,10/31,11/6,11/14,11/16 Gerd Kortemeyer) |
# |
# |
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# 3/1/1,6/1,17/1 Gerd Kortemeyer |
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package Apache::lonnavmaps; |
package Apache::lonnavmaps; |
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use strict; |
use strict; |
use Apache::Constants qw(:common); |
use Apache::Constants qw(:common :http); |
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use Apache::lonnet(); |
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use HTML::TokeParser; |
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use GDBM_File; |
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# -------------------------------------------------------------- Module Globals |
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my %hash; |
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my @rows; |
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# ------------------------------------------------------------------ Euclid gcd |
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sub euclid { |
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my ($e,$f)=@_; |
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my $a; my $b; my $r; |
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if ($e>$f) { $b=$e; $r=$f; } else { $r=$e; $b=$f; } |
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while ($r!=0) { |
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$a=$b; $b=$r; |
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$r=$a%$b; |
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} |
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return $b; |
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} |
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# ------------------------------------------------------------ Build page table |
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sub tracetable { |
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my ($sofar,$rid,$beenhere)=@_; |
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my $further=$sofar; |
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unless ($beenhere=~/\&$rid\&/) { |
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$beenhere.=$rid.'&'; |
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if (defined($hash{'is_map_'.$rid})) { |
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$sofar++; |
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my $tprefix=''; |
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if ($hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$rid}}} |
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eq 'sequence') { |
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$tprefix='h'; |
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} |
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if (defined($rows[$sofar])) { |
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$rows[$sofar].='&'.$tprefix.$rid; |
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} else { |
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$rows[$sofar]=$tprefix.$rid; |
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} |
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if ((defined($hash{'map_start_'.$hash{'src_'.$rid}})) && |
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(defined($hash{'map_finish_'.$hash{'src_'.$rid}})) && |
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($tprefix eq 'h')) { |
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my $frid=$hash{'map_finish_'.$hash{'src_'.$rid}}; |
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$sofar= |
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&tracetable($sofar,$hash{'map_start_'.$hash{'src_'.$rid}}, |
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'&'.$frid.'&'); |
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$sofar++; |
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if ($hash{'src_'.$frid}) { |
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my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$frid}); |
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if (($brepriv eq '2') || ($brepriv eq 'F')) { |
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my $pprefix=''; |
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if ($hash{'src_'.$frid}=~/\.problem$/) { |
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$pprefix='p1'; |
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} |
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if (defined($rows[$sofar])) { |
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$rows[$sofar].='&'.$pprefix.$frid; |
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} else { |
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$rows[$sofar]=$pprefix.$frid; |
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} |
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} |
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} |
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} |
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} else { |
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$sofar++; |
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if ($hash{'src_'.$rid}) { |
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my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$rid}); |
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if (($brepriv eq '2') || ($brepriv eq 'F')) { |
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my $pprefix=''; |
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if ($hash{'src_'.$rid}=~/\.problem$/) { |
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$pprefix='p1'; |
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} |
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if (defined($rows[$sofar])) { |
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$rows[$sofar].='&'.$pprefix.$rid; |
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} else { |
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$rows[$sofar]=$pprefix.$rid; |
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} |
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} |
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} |
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} |
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if (defined($hash{'to_'.$rid})) { |
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my $mincond=1; |
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my $next=''; |
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map { |
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my $thiscond= |
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&Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}}); |
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if ($thiscond>=$mincond) { |
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if ($next) { |
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$next.=','.$_.':'.$thiscond; |
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} else { |
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$next=$_.':'.$thiscond; |
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} |
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if ($thiscond>$mincond) { $mincond=$thiscond; } |
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} |
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} split(/\,/,$hash{'to_'.$rid}); |
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map { |
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my ($linkid,$condval)=split(/\:/,$_); |
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if ($condval>=$mincond) { |
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my $now=&tracetable($sofar,$hash{'goesto_'.$linkid},$beenhere); |
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if ($now>$further) { $further=$now; } |
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} |
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} split(/\,/,$next); |
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} |
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} |
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return $further; |
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} |
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# ================================================================ Main Handler |
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sub handler { |
sub handler { |
my $r = shift; |
my $r=shift; |
$r->content_type('text/html'); |
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$r->send_http_header; |
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return OK if $r->header_only; |
# ------------------------------------------- Set document type for header only |
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# --------------------------------------------------- Print login screen header |
if ($r->header_only) { |
$r->print(<<ENDDOCUMENT); |
if ($ENV{'browser.mathml'}) { |
<html> |
$r->content_type('text/xml'); |
<head> |
} else { |
<title>The LearningOnline Network with CAPA</title> |
$r->content_type('text/html'); |
</head> |
} |
<body bgcolor="#FFFFFF"> |
$r->send_http_header; |
<h1>Navigate Maps</h1> |
return OK; |
<img src="/adm/lonKaputt/lonconstruct.gif"> |
} |
</body> |
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</html> |
my $requrl=$r->uri; |
ENDDOCUMENT |
# ----------------------------------------------------------------- Tie db file |
return OK; |
if ($ENV{'request.course.fn'}) { |
} |
my $fn=$ENV{'request.course.fn'}; |
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if (-e "$fn.db") { |
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if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER,0640)) { |
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# ------------------------------------------------------------------- Hash tied |
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my $firstres=$hash{'map_start_/res/'.$ENV{'request.course.uri'}}; |
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my $lastres=$hash{'map_finish_/res/'.$ENV{'request.course.uri'}}; |
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if (($firstres) && ($lastres)) { |
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# ----------------------------------------------------------------- Render page |
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@rows=(); |
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&tracetable(0,$firstres,'&'.$lastres.'&'); |
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if ($hash{'src_'.$lastres}) { |
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my $brepriv= |
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&Apache::lonnet::allowed('bre',$hash{'src_'.$lastres}); |
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if (($brepriv eq '2') || ($brepriv eq 'F')) { |
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$rows[$#rows+1]=''.$lastres; |
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} |
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} |
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# ------------------------------------------------------------------ Page parms |
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my $j; |
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my $i; |
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my $lcm=1; |
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my $contents=0; |
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# ---------------------------------------------- Go through table to get layout |
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for ($i=0;$i<=$#rows;$i++) { |
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if ($rows[$i]) { |
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$contents++; |
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my @colcont=split(/\&/,$rows[$i]); |
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$lcm*=($#colcont+1)/euclid($lcm,($#colcont+1)); |
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} |
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} |
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unless ($contents) { |
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$r->content_type('text/html'); |
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$r->send_http_header; |
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$r->print('<html><body>Empty Map.</body></html>'); |
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} else { |
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# ------------------------------------------------------------------ Build page |
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# ---------------------------------------------------------------- Send headers |
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$r->content_type('text/html'); |
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$r->send_http_header; |
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$r->print( |
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'<html><head><title>Navigate LON-CAPA Maps</title></head>'); |
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$r->print('<body bgcolor="#FFFFFF">'. |
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'<script>window.focus();</script>'. |
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'<img align=right src=/adm/lonIcons/lonlogos.gif>'. |
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'<h1>Navigate Course Map</h1>'); |
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$r->rflush(); |
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# ----------------------------------------------------------------- Start table |
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$r->print('<table cols="'.$lcm.'" border="0">'); |
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for ($i=0;$i<=$#rows;$i++) { |
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if ($rows[$i]) { |
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$r->print("\n<tr>"); |
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my @colcont=split(/\&/,$rows[$i]); |
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my $avespan=$lcm/($#colcont+1); |
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for ($j=0;$j<=$#colcont;$j++) { |
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my $rid=$colcont[$j]; |
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my $add='<td> '; |
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my $adde='</td>'; |
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my $hwk='<font color="#223322">'; |
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my $hwke='</font>'; |
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if ($rid=~/^h(.+)/) { |
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$rid=$1; |
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$add='<th bgcolor="#AAFF55">'; |
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$adde='</th>'; |
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} |
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if ($rid=~/^p(\d)(.+)/) { |
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my $code=$1; |
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$rid=$2; |
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$hwk='<font color="#999911">'; |
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if ($code eq '2') { |
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$hwk='<font color="#999911"><b>'; |
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$hwke='</b></font>'; |
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} |
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if ($code eq '3') { |
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$hwk='<font color="#229922">'; |
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} elsif ($code eq '4') { |
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$hwk='<font color="#992222">'; |
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} |
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} |
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$r->print($add.'<a href="'.$hash{'src_'.$rid}. |
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'">'.$hwk. |
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$hash{'title_'.$rid}.$hwke.'</a>'.$adde); |
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} |
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$r->print('</tr>'); |
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} |
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} |
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$r->print("\n</table>"); |
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$r->print('</body></html>'); |
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# -------------------------------------------------------------------- End page |
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} |
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# ------------------------------------------------------------- End render page |
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} else { |
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$r->content_type('text/html'); |
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$r->send_http_header; |
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$r->print('<html><body>Coursemap undefined.</body></html>'); |
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} |
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# ------------------------------------------------------------------ Untie hash |
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unless (untie(%hash)) { |
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&Apache::lonnet::logthis("<font color=blue>WARNING: ". |
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"Could not untie coursemap $fn (browse).</font>"); |
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} |
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# -------------------------------------------------------------------- All done |
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return OK; |
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# ----------------------------------------------- Errors, hash could no be tied |
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} |
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} |
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} |
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$ENV{'user.error.msg'}="$requrl:bre:0:0:Course not initialized"; |
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return HTTP_NOT_ACCEPTABLE; |
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} |
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1; |
1; |
__END__ |
__END__ |
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