version 1.2, 2000/10/16 21:09:33
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version 1.3, 2000/10/17 10:36:17
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Line 12
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# |
# |
# 10/16 Gerd Kortemeyer |
# 10/16 Gerd Kortemeyer |
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package Apache::lonambiguous; |
package Apache::lonsequence; |
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use strict; |
use strict; |
use Apache::lonnet; |
use Apache::lonnet; |
use Apache::Constants qw(:common REDIRECT); |
use Apache::Constants qw(:common :http REDIRECT); |
use GDBM_File; |
use GDBM_File; |
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Line 28 sub getlost {
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Line 28 sub getlost {
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$r->send_http_header; |
$r->send_http_header; |
$r->print( |
$r->print( |
'<head><title>Unknown Error</title></head><body bgcolor="#FFFFFF"><h1>'. |
'<head><title>Unknown Error</title></head><body bgcolor="#FFFFFF"><h1>'. |
'LON-CAPA</h1>Could not handle ambiguous resource reference.<p>'.$errmsg. |
'LON-CAPA</h1>Could not handle sequence resource reference.<p>'.$errmsg. |
'</body></html>'); |
'</body></html>'); |
} |
} |
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Line 47 sub handler {
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Line 47 sub handler {
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my %bighash; |
my %bighash; |
my $requrl=$r->uri; |
my $requrl=$r->uri; |
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# ----------------------------------------------------------------- Tie db file |
# ------------------------------------------------------------ Tie symb db file |
if ($ENV{'request.course.fn'}) { |
if ($ENV{'request.course.fn'}) { |
my $last; |
my $last; |
if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db', |
if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db', |
Line 55 sub handler {
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Line 55 sub handler {
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$last=$hash{'last_direction'}; |
$last=$hash{'last_direction'}; |
untie(%hash); |
untie(%hash); |
} |
} |
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my $direction=''; |
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my $prevmap=''; |
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if ($last) { |
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($prevmap,$direction)=(split(/\_\_\_/,$last)); |
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} |
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# ------------------------------------------------------------- Tie big db file |
if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db', |
if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db', |
&GDBM_READER,0640)) { |
&GDBM_READER,0640)) { |
my $direction=''; |
my $disid=''; |
my $prevmap=''; |
if ($direction eq 'back') { |
if ($last) { |
$disid=$bighash{'map_finish_'.$requrl}; |
($prevmap,$direction)=(split(/\_\_\_/,$last)); |
} else { |
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$disid=$bighash{'map_start_'.$requrl}; |
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} |
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my $disurl=''; |
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if ($disid) { |
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$disurl=$bighash{'src_'.$disid}; |
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} |
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my $symb=''; |
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unless($disurl) { |
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if ($symb=&Apache::lonnet::symbread()) { |
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} |
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} |
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# --------------------------------------- Untie hash, make sure to come by here |
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untie(%bighash); |
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if ($disurl) { |
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# -------------------------------------------------- Has first or last resource |
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$r->content_type('text/html'); |
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$r->header_out(Location => 'http://'.$ENV{'HTTP_HOST'}.$disurl); |
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return REDIRECT; |
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} else { |
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# ---------- Does not have first or last resource, try to find out where we are |
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unless ($symb) { |
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$r->internal_redirect('/adm/ambiguous'); |
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} |
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$r->content_type('text/html'); |
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$r->send_http_header; |
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$r->print(<<ENDSYMB); |
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<html><body> |
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</body></html> |
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ENDSYMB |
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return OK |
} |
} |
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# ===== Stuff goes here |
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foreach $envkey (keys %ENV) { |
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if ($envkey=~/^form\.(\d+)\.(\d+)$/) { |
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my $mapid=$1; |
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my $resid=$2; |
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my $resurl=$bighash{'src_'.$mapid.'.'.$resid}; |
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&Apache::lonnet::symblist($bighash{'map_id_'.$mapid}, |
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$resurl => $resid); |
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$r->header_out(Location => |
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'http://'.$ENV{'HTTP_HOST'}.$resurl); |
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return REDIRECT; |
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} |
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} |
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untie(%bighash); |
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} else { |
} else { |
&getlost($r,'Could not access course structure.'); |
&getlost($r,'Could not access course structure.'); |
return OK; |
return OK; |
Line 87 sub handler {
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Line 108 sub handler {
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} |
} |
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return OK; |
return OK; |
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# ================================================================= TRASH BELOW |
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# ---------------------------------------------------------- Do we have a case? |
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my $thisfn; |
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unless (($thisfn=$ENV{'request.ambiguous'})&&($ENV{'request.course.fn'})) { |
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&getlost($r,'Could not find information on resource.'); |
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return OK; |
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} |
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# ---------------------------------- Should this file have been part of a page? |
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$thisfn=&Apache::lonnet::declutter($thisfn); |
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my %hash; |
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my $syval=''; |
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if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db', |
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&GDBM_READER,0640)) { |
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$syval=$hash{$thisfn}; |
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untie(%hash); |
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} |
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# ---------------------------------------------------------- There was an entry |
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if ($syval) { |
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if ($syval=~/\_$/) { |
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# ----------------------------------- Okay, this should have appeared on a page |
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$syval=~s/\_\_\_$//; |
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$r->content_type('text/html'); |
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$r->header_out(Location => |
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'http://'.$ENV{'HTTP_HOST'}.'/res/'.$syval); |
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return REDIRECT; |
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} else { |
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# There is not really a problem (???), but cannot go back without endless loop |
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&getlost($r,'The nature of the problem is unclear'); |
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return OK; |
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} |
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} |
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# ------------------------------------------------ Would be standalone resource |
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if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db', |
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&GDBM_READER,0640)) { |
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# ---------------------------------------------- Get ID(s) for current resource |
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my $ids=$bighash{'ids_/res/'.$thisfn}; |
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if ($ids) { |
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# ------------------------------------------------------------------- Has ID(s) |
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my @possibilities=split(/\,/,$ids); |
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my $couldbe=''; |
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map { |
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if (&Apache::lonnet::allowed('bre',$bighash{'src_'.$_})) { |
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if ($couldbe) { |
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$couldbe.=','.$_; |
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} else { |
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$couldbe=$_; |
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} |
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} |
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} @possibilities; |
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if ($couldbe) { |
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@possibilities=split(/\,/,$couldbe); |
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if ($#possibilities>0) { |
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# ----------------------------------------------- Okay, really multiple choices |
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$r->content_type('text/html'); |
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$r->send_http_header; |
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$r->print(<<ENDSTART); |
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<head><title>Choose Location</title></head> |
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<body bgcolor="#FFFFFF"> |
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<h1>LON-CAPA</h1> |
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The resource you had been accessing appears more than once in this course, |
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and LON-CAPA has insufficient session information to determine which instance |
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of the resource you meant. |
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<p> |
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Please click on the instance of the resource you intended to access: |
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<p> |
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<form action="/adm/ambiguous" method=post> |
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<input type=hidden name=orgurl value="$thisfn"> |
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<input type=hidden name=selecturl value=1> |
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<table border=2> |
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<tr><th> </th><th>Title</th><th>Type</th><th>Part of ...</th></tr> |
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ENDSTART |
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map { |
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my $mapurl=$bighash{'map_id_'.(split(/\./,$_))[0]}; |
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$r->print('<tr><td><input type=submit value=Select name="'. |
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$_.'"></td><td>'.$bighash{'title_'.$_}. |
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'</td><td>'.$bighash{'type_'.$_}. |
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'</td><td><a href="'.$mapurl.'">'.$mapurl. |
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'</a></td></tr>'); |
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} @possibilities; |
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$r->print('</table></form></body></html>'); |
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untie(%bighash); |
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return OK; |
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} |
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} |
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} |
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untie(%bighash); |
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} |
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# ------------------------------------ This handler should not have been called |
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&getlost($r,'Invalid call of handler'); |
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return OK; |
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} |
} |
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1; |
1; |