--- rat/lonsequence.pm 2002/05/23 13:04:59 1.10 +++ rat/lonsequence.pm 2008/11/18 19:13:37 1.34 @@ -2,7 +2,7 @@ # # Sequence Handler # -# $Id: lonsequence.pm,v 1.10 2002/05/23 13:04:59 www Exp $ +# $Id: lonsequence.pm,v 1.34 2008/11/18 19:13:37 jms Exp $ # # Copyright Michigan State University Board of Trustees # @@ -26,15 +26,36 @@ # # http://www.lon-capa.org/ # -# (Handler to resolve ambiguous file locations -# -# (TeX Content Handler -# -# 05/29/00,05/30,10/11 Gerd Kortemeyer) -# -# 10/11,10/12 Gerd Kortemeyer) -# -# 10/16 Gerd Kortemeyer + +=head1 NAME + +Apache::lonsequence + +=head1 SYNOPSIS + +Handler for showing sequence objects of +educational resources. + +This is part of the LearningOnline Network with CAPA project +described at http://www.lon-capa.org. + +=head1 SUBROUTINES + +=over + +=item handler() + +=item viewmap() + +=item attemptread() + +=item mapread() + +=item start_fresh_session() + +=back + +=cut package Apache::lonsequence; @@ -42,29 +63,33 @@ use strict; use Apache::lonnet; use Apache::Constants qw(:common :http REDIRECT); use GDBM_File; -use Apache::lonratedt; -use Apache::lonratsrv; - -# ----------------------------------------------------------- Could not resolve - -sub getlost { - my ($r,$errmsg)=@_; - $r->content_type('text/html'); - $r->send_http_header; - $r->print( - 'Unknown Error

'. - 'LON-CAPA

Could not handle sequence resource reference.

'.$errmsg. - ''); -} +use LONCAPA::map(); +use Apache::lonpageflip(); +use Apache::loncommon(); +use Apache::groupsort(); +use Apache::lonlocal; +use HTML::Entities(); +my %selhash; +my $successtied; # ----------------------------------------- Attempt to read from resource space sub attemptread { + my ($fn,$unsorted)=@_; + &Apache::lonnet::repcopy($fn); + if (-e $fn) { + return &LONCAPA::map::attemptread($fn,$unsorted); + } else { + return (); + } +} + +sub mapread { my $fn=shift; &Apache::lonnet::repcopy($fn); if (-e $fn) { - return &Apache::lonratedt::attemptread($fn); + return &LONCAPA::map::mapread($fn,''); } else { return (); } @@ -74,12 +99,14 @@ sub attemptread { sub viewmap { my ($r,$url)=@_; - $r->print(''); - if ($ENV{'form.forceselect'}) { $r->print(< + + my $js; + if ($env{'form.forceselect'}) { + $js = (< function select_group() { - window.location="/adm/groupsort?catalogmode=groupimport&mode=rat&acts="+document.forms.fileattr.acts.value; + window.location="/adm/groupsort?catalogmode=groupsec&mode=rat&acts="+document.forms.fileattr.acts.value; } function queue(val) { @@ -98,115 +125,226 @@ function queue(val) { ENDSCRIPT } - $r->print(''); - if ($ENV{'form.forceselect'}) { $r->print(<print(&Apache::loncommon::start_page('Map Contents',$js). + '

'.$url.'

'); +# ------------------ This is trying to select. Provide buttons and tie %selhash + if ($env{'form.forceselect'}) { $r->print(< ENDSELECT + my $diropendb = + "/home/httpd/perl/tmp/$env{'user.domain'}\_$env{'user.name'}_sel_res.db"; + if (tie(%selhash,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) { + if ($env{'form.launch'} eq '1') { + &start_fresh_session(); + } + $successtied=1; + +# - Evaluate actions from previous page (both cumulatively and chronologically) + if ($env{'form.catalogmode'} eq 'import') { + &Apache::groupsort::update_actions_hash(\%selhash); + } +# - + } + } +# ----------------------------- successtied is now '1' if in working selectmode + my ($errtext,$fatal)=&mapread(&Apache::lonnet::filelocation('',$url),''); + if ($fatal==1) { + $r->print('

'.&mt('Map contents are not shown in order.').'


'); } my $idx=0; foreach (&attemptread(&Apache::lonnet::filelocation('',$url))) { if (defined($_)) { $idx++; - if ($ENV{'form.forceselect'}) { + if ($successtied) { $r->print('
'); } my ($title,$url)=split(/\:/,$_); - $title=~s/\&colon\;/\:/g; - $url=~s/\&colon\;/\:/g; - unless ($title) { $title=(split(/\//,$url))[-1] }; - unless ($title) { $title='Empty'; } + $title = &LONCAPA::map::qtescape($title); + unless ($title) { $title=(split(/\//,$url))[-1] }; + my $enc_title = &HTML::Entities::encode($title,'\'"<>&'); + unless ($title) { + $title=''.&mt('Empty').''; + $enc_title = &mt('Empty'); + } + $url = &LONCAPA::map::qtescape($url); + my $enc_url = &HTML::Entities::encode($url,'\'"<>&'); if ($url) { - if ($ENV{'form.forceselect'}) { + if ($successtied) { + my $checked=''; + if ($selhash{'store_'.$url}) { + $checked=" checked"; + } + $selhash{"pre_${idx}_link"}=$url; + $selhash{"pre_${idx}_title"}=$title; + + $url = &HTML::Entities::encode($url, '\'"<>&'); $r->print(< - +value='$enc_url' onClick='javascript:queue("form$idx")'$checked /> + ENDCHECKBOX } - $r->print(''); + $r->print(''); } - $r->print(&Apache::lonratsrv::qtescape($title)); + $r->print($enc_title); if ($url) { $r->print(''); } - if ($ENV{'form.forceselect'}) { + if ($successtied) { $r->print(''); } else { $r->print('
'); } } } - $r->print(''); + $r->print(&Apache::loncommon::end_page()); + if ($successtied) { + untie %selhash; + } } +# ----------------------------------------------------------- Clean out selhash +sub start_fresh_session { + foreach (keys %selhash) { + if ($_ =~ /^pre_/) { + delete $selhash{$_}; + } + if ($_ =~ /^store/) { + delete $selhash{$_}; + } + } +} + + # ================================================================ Main Handler sub handler { my $r=shift; if ($r->header_only) { - $r->content_type('text/html'); + &Apache::loncommon::content_type($r,'text/html'); $r->send_http_header; return OK; } &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'}, - ['forceselect']); + ['forceselect','launch']); my %hash; my %bighash; my $requrl=$r->uri; + $successtied=0; # ------------------------------------------------------------ Tie symb db file my $disurl=''; my $dismapid=''; + my $exitdisid = ''; + my $arrow_dir = ''; - if (($ENV{'request.course.fn'}) && (!$ENV{'form.forceselect'})) { + if (($env{'request.course.fn'}) && (!$env{'form.forceselect'})) { my $last; - if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db', - &GDBM_READER,0640)) { + if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db', + &GDBM_READER(),0640)) { $last=$hash{'last_direction'}; untie(%hash); } my $direction=''; my $prevmap=''; if ($last) { - ($prevmap,$direction)=(split(/\_\_\_/,$last)); + ($prevmap,undef,$direction)=&Apache::lonnet::decode_symb($last); } # ------------------------------------------------------------- Tie big db file - if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db', - &GDBM_READER,0640)) { + if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db', + &GDBM_READER(),0640)) { my $disid=''; + my $randomout =''; if ($direction eq 'back') { $disid=$bighash{'map_finish_'.$requrl}; } else { $disid=$bighash{'map_start_'.$requrl}; - } + } if ($disid) { $disurl=$bighash{'src_'.$disid}; $dismapid=(split(/\./,$disid))[1]; + if (!$env{'request.role.adv'}) { + $randomout = $bighash{'randomout_'.$disid}; + } + } elsif (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db', + &GDBM_READER(),0640)) { + $last=$hash{'last_known'}; + untie(%hash); } + + +# ----------- If this is an empty one, or hidden, skip to next non-empty or non-hidden one + while ( ((!$disurl) && ($disid)) || ($randomout && $disid) ) { + $direction=($direction?$direction:'forward'); + ($disid,$requrl)= + &Apache::lonpageflip::fullmove($disid, + &Apache::lonnet::declutter($requrl),$direction); + if ($disid) { + $disurl=$bighash{'src_'.$disid}; + $dismapid=(split(/\./,$disid))[1]; + if (!$env{'request.role.adv'}) { + $randomout = $bighash{'randomout_'.$disid}; + } + } + } + $exitdisid = $disid; + $arrow_dir = $direction; + # --------------------------------------- Untie hash, make sure to come by here untie(%bighash); } } # now either disurl is set (going to first page), or we need another display - if ($disurl) { # -------------------------------------------------- Has first or last resource - &Apache::lonnet::symblist($requrl,$disurl => $dismapid, - 'last_known' => &Apache::lonnet::declutter($disurl)); - $r->content_type('text/html'); + &Apache::lonnet::symblist($requrl,$disurl => [$disurl,$dismapid], + 'last_known' => [$disurl,$dismapid]); + &Apache::loncommon::content_type($r,'text/html'); $r->header_out(Location => 'http://'.$ENV{'HTTP_HOST'}.$disurl); return REDIRECT; } else { - $r->content_type('text/html'); + &Apache::loncommon::content_type($r,'text/html'); $r->send_http_header; - &viewmap($r,$requrl); + if ($exitdisid eq '' && $arrow_dir ne '') { + my %lt =&Apache::lonlocal::texthash( + 'back' => 'beginning', + 'forward' => 'end', + 'nere' => 'Next resource could not be displayed', + 'goba' => 'Go Back', + 'nacc' => 'Navigate Course Content', + ); + my $warnmsg = &mt('As all folders and sequences '); + if ($arrow_dir eq 'forward') { + $warnmsg .= &mt('following the current resource were empty').','; + } elsif ($arrow_dir eq 'back') { + $warnmsg .= &mt('preceding the current resource were empty').','; + } + $warnmsg .= &mt('you have now reached the').' '.$lt{$arrow_dir}.' '.&mt('of the course.'); + my $start_page= + &Apache::loncommon::start_page('Empty Folder/Sequence'); + my $end_page= + &Apache::loncommon::end_page(); + $r->print(<$lt{'nere'} +

$warnmsg

+ +$end_page +ENDNONE + } else { + &viewmap($r,$requrl); + } return OK; } }