# The LearningOnline Network with CAPA # # Page flip handler # # (Page Handler # # (TeX Content Handler # # 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, # 10/02 Gerd Kortemeyer) # # 10/03,10/05,10/06,10/07,10/09 Gerd Kortemeyer package Apache::lonpageflip; use strict; use Apache::Constants qw(:common :http REDIRECT); use Apache::lonnet(); use HTML::TokeParser; use GDBM_File; # ========================================================== Module Global Hash my %hash; sub addrid { my ($current,$new,$condid)=@_; unless ($condid) { $condid=0; } if (&Apache::lonnet::allowed('bre',$hash{'src_'.$new})) { if ($current) { $current.=','.$new.':'.$condid; } else { $current=''.$new.':'.$condid; } } return $current; } # ================================================================ Main Handler sub handler { my $r=shift; # ------------------------------------------- Set document type for header only if ($r->header_only) { $r->content_type('text/html'); $r->send_http_header; return OK; } my %cachehash=(); my $redirecturl=''; my $next=''; my @possibilities=(); if (($ENV{'form.postdata'})&&($ENV{'request.course.fn'})) { $ENV{'form.postdata'}=~/(\w+)\:(.*)/; my $direction=$1; my $currenturl=$2; my $redirecturl=$currenturl; $currenturl=~s/^http\:\/\///; $currenturl=~s/^[^\/]+//; # ------------------------------------------- Do we have any idea where we are? my $position; if ($position=Apache::lonnet::symbread($currenturl)) { # ------------------------------------------------------------------------- Yes my ($mapurl,$mapnum,$thisurl)=split(/\_\_\_/,$position); $cachehash{$thisurl}=$mapnum; if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'.db', &GDBM_READER,0640)) { my $rid=$hash{'map_pc_/res/'.$mapurl}.'.'.$mapnum; my $next=''; if ($direction eq 'forward') { map { $next=&addrid($next,$hash{'goesto_'.$_}, $hash{'condid_'.$hash{'undercond_'.$_}}); } split(/\,/,$hash{'to_'.$rid}); } elsif ($direction eq 'back') { map { $next=&addrid($next,$hash{'comesfrom_'.$_}, $hash{'condid_'.$hash{'undercond_'.$_}}); } split(/\,/,$hash{'from_'.$rid}); } elsif ($direction eq 'up') { } elsif ($direction eq 'down') { } my $redirectid=''; # ----------------------------------------------------- Check out possibilities if ($next) { @possibilities=split(/\,/,$next); if ($#possibilities==0) { $redirectid=(split(/\:/,$next))[0]; } else { } } if ($redirectid) { $redirecturl=$hash{'src_'.$redirectid}; } untie(%hash); if ($redirecturl) { $r->content_type('text/html'); $r->header_out(Location => 'http://'.$ENV{'HTTP_HOST'}.$redirecturl); return REDIRECT; } } } # -------------------------------------------------------- No, could not decide } $r->content_type('text/html'); $r->send_http_header; $r->print(''); # -------------------------- Class was not initialized or page fliped strangely } else { $ENV{'user.error.msg'}="/adm/flip:bre:0:0:Choose Course"; return HTTP_NOT_ACCEPTABLE; } # ------TRASH BELOW # --------------------------- TRASH $r->print(''); return OK; # ========================================================= TOTAL TRASH # &Apache::lonnet::symblist($requrl,%symbhash); } 1; __END__