version 1.5, 2001/11/29 19:23:49
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version 1.58, 2022/10/19 18:09:03
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Line 26
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Line 26
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# |
# |
# http://www.lon-capa.org/ |
# http://www.lon-capa.org/ |
# |
# |
# (Handler to resolve ambiguous file locations |
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# |
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# (TeX Content Handler |
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# |
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# 05/29/00,05/30,10/11 Gerd Kortemeyer) |
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# |
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# 10/11,10/12 Gerd Kortemeyer) |
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# |
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# 10/16 Gerd Kortemeyer |
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package Apache::lonsequence; |
package Apache::lonsequence; |
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Line 42 use strict;
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Line 35 use strict;
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use Apache::lonnet; |
use Apache::lonnet; |
use Apache::Constants qw(:common :http REDIRECT); |
use Apache::Constants qw(:common :http REDIRECT); |
use GDBM_File; |
use GDBM_File; |
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use LONCAPA::map(); |
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use LONCAPA::ltiutils; |
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use LONCAPA; |
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use Apache::lonpageflip(); |
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use Apache::loncommon(); |
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use Apache::groupsort(); |
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use Apache::lonlocal; |
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use Apache::lonnavmaps(); |
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use Apache::lonenc(); |
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use HTML::Entities(); |
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my %selhash; |
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my $successtied; |
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# ----------------------------------------- Attempt to read from resource space |
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sub attemptread { |
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my ($fn,$unsorted)=@_; |
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&Apache::lonnet::repcopy($fn); |
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if (-e $fn) { |
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return &LONCAPA::map::attemptread($fn,$unsorted); |
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} else { |
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return (); |
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} |
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} |
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sub mapread { |
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my $fn=shift; |
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&Apache::lonnet::repcopy($fn); |
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if (-e $fn) { |
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return &LONCAPA::map::mapread($fn,''); |
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} else { |
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return (); |
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} |
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} |
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# ---------------------------------------------------------------- View Handler |
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# ----------------------------------------------------------- Could not resolve |
sub viewmap { |
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my ($r,$url)=@_; |
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sub getlost { |
my $js; |
my ($r,$errmsg)=@_; |
if ($env{'form.forceselect'}) { |
$r->content_type('text/html'); |
$js = (<<ENDSCRIPT); |
$r->send_http_header; |
<script type="text/javascript"> |
$r->print( |
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'<head><title>Unknown Error</title></head><body bgcolor="#FFFFFF"><h1>'. |
function select_group() { |
'LON-CAPA</h1>Could not handle sequence resource reference.<p>'.$errmsg. |
window.location="/adm/groupsort?catalogmode=groupsec&mode=rat&acts="+document.forms.fileattr.acts.value; |
'</body></html>'); |
} |
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function queue(val) { |
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if (eval("document.forms."+val+".filelink.checked")) { |
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var l=val.length; |
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var v=val.substring(4,l); |
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document.forms.fileattr.acts.value+='1a'+v+'b'; |
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} |
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else { |
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var l=val.length; |
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var v=val.substring(4,l); |
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document.forms.fileattr.acts.value+='0a'+v+'b'; |
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} |
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} |
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</script> |
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ENDSCRIPT |
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} |
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$r->print(&Apache::loncommon::start_page('Map Contents',$js). |
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'<h1>'.$url.'</h1>'); |
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# ------------------ This is trying to select. Provide buttons and tie %selhash |
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if ($env{'form.forceselect'}) { $r->print(<<ENDSELECT); |
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<form name="fileattr"><input type="hidden" name="acts" value="" /> |
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<input type="button" name="close" value="CLOSE" onClick="self.close()" /> |
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<input type="button" name="groupimport" value="GROUP IMPORT" |
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onClick="javascript:select_group()" /> |
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</form> |
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ENDSELECT |
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my $diropendb = |
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LONCAPA::tempdir() . |
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"$env{'user.domain'}\_$env{'user.name'}_sel_res.db"; |
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if (tie(%selhash,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) { |
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if ($env{'form.launch'} eq '1') { |
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&start_fresh_session(); |
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} |
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$successtied=1; |
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# - Evaluate actions from previous page (both cumulatively and chronologically) |
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if ($env{'form.catalogmode'} eq 'import') { |
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&Apache::groupsort::update_actions_hash(\%selhash); |
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} |
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# - |
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} |
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} |
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# ----------------------------- successtied is now '1' if in working selectmode |
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my ($errtext,$fatal)=&mapread(&Apache::lonnet::filelocation('',$url),''); |
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if ($fatal==1) { |
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$r->print('<p class="LC_warning">' |
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.&mt('Map contents are not shown in order.') |
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.'</p><br />'); |
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} |
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my $idx=0; |
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foreach my $entry (&attemptread(&Apache::lonnet::filelocation('',$url))) { |
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if (defined($entry)) { |
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$idx++; |
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if ($successtied) { |
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$r->print('<form name="form'.$idx.'">'); |
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} |
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my ($title,$url)=split(/\:/,$entry); |
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$title = &LONCAPA::map::qtescape($title); |
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unless ($title) { $title=(split(/\//,$url))[-1] }; |
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my $enc_title = &HTML::Entities::encode($title,'\'"<>&'); |
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unless ($title) { |
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$title='<i>'.&mt('Empty').'</i>'; |
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$enc_title = &mt('Empty'); |
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} |
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$url = &LONCAPA::map::qtescape($url); |
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my $enc_url = &HTML::Entities::encode($url,'\'"<>&'); |
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if ($url) { |
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if ($successtied) { |
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my $checked=''; |
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if ($selhash{'store_'.$url}) { |
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$checked=' checked="checked"'; |
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} |
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$selhash{"pre_${idx}_link"}=$url; |
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$selhash{"pre_${idx}_title"}=$title; |
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$url = &HTML::Entities::encode($url, '\'"<>&'); |
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$r->print(<<ENDCHECKBOX); |
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<input type='checkbox' name='filelink' |
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value='$enc_url' onClick='javascript:queue("form$idx")'$checked /> |
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<input type='hidden' name='title' value='$enc_title' /> |
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ENDCHECKBOX |
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} |
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$r->print('<a href="'.$enc_url.'">'); |
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} |
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$r->print($enc_title); |
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if ($url) { $r->print('</a>'); } |
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if ($successtied) { |
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$r->print('</form>'); |
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} else { |
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$r->print('<br />'); |
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} |
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} |
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} |
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$r->print(&Apache::loncommon::end_page()); |
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if ($successtied) { |
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untie %selhash; |
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} |
} |
} |
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# ----------------------------------------------------------- Clean out selhash |
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sub start_fresh_session { |
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foreach my $item (keys(%selhash)) { |
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if ($item =~ /^pre_/) { |
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delete $selhash{$item}; |
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} |
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if ($item =~ /^store/) { |
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delete $selhash{$item}; |
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} |
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} |
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} |
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# ================================================================ Main Handler |
# ================================================================ Main Handler |
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sub handler { |
sub handler { |
my $r=shift; |
my $r=shift; |
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if ($r->header_only) { |
if ($r->header_only) { |
$r->content_type('text/html'); |
&Apache::loncommon::content_type($r,'text/html'); |
$r->send_http_header; |
$r->send_http_header; |
return OK; |
return OK; |
} |
} |
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my $requrl=$r->uri; |
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&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'}, |
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['forceselect','launch','navmap']); |
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if (($env{'request.course.fn'}) && ($env{'form.navmap'}) && ($env{'request.course.id'})) { |
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my $crstype = &Apache::loncommon::course_type(); |
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unless (($crstype eq 'Placement') && (!$env{'request.role.adv'})) { |
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# Check for critical messages and redirect if present. |
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my ($redirect,$url) = &Apache::loncommon::critical_redirect(300,'contents'); |
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if ($redirect) { |
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&Apache::loncommon::content_type($r,'text/html'); |
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$r->header_out(Location => $url); |
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return REDIRECT; |
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} |
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# Check if course needs to be re-initialized |
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my $loncaparev = $r->dir_config('lonVersion'); |
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my ($result,@reinit) = &Apache::loncommon::needs_coursereinit($loncaparev); |
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if ($result eq 'switch') { |
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&Apache::loncommon::content_type($r,'text/html'); |
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$r->send_http_header; |
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$r->print(&Apache::loncommon::check_release_result(@reinit)); |
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return OK; |
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} |
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my ($cnum,$cdom); |
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if ($result) { |
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$cnum = $env{'course.'.$env{'request.course.id'}.'.num'}; |
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$cdom = $env{'course.'.$env{'request.course.id'}.'.domain'}; |
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} |
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if (($result eq 'main') || ($result eq 'both')) { |
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my ($furl,$ferr) = &Apache::lonuserstate::readmap("$cdom/$cnum"); |
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if ($ferr) { |
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my $requrl = $r->uri; |
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$env{'user.error.msg'}="$requrl:bre:0:0:Course not initialized"; |
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$env{'user.reinit'} = 1; |
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return HTTP_NOT_ACCEPTABLE; |
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} |
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} |
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if (($result eq 'both') || ($result eq 'supp')) { |
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my $possdel; |
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if ($result eq 'supp') { |
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$possdel = 1; |
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} |
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my ($supplemental,$refs_updated) = &Apache::lonnet::get_supplemental($cnum,$cdom,'',$possdel); |
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unless ($refs_updated) { |
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&Apache::loncommon::set_supp_httprefs($cnum,$cdom,$supplemental,$possdel); |
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} |
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} |
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&Apache::loncommon::content_type($r,'text/html'); |
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$r->send_http_header; |
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my $mapurl = &Apache::lonnet::declutter($requrl); |
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my $maptitle = &Apache::lonnet::gettitle($mapurl); |
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my @crumbs = ({text => $maptitle, no_mt => 1}); |
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my $args = {'bread_crumbs' => \@crumbs, |
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'bread_crumbs_nomenu' => 1}; |
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# Create the nav map |
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my $navmap = Apache::lonnavmaps::navmap->new(); |
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if (ref($navmap)) { |
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# renderer call |
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if (&Apache::lonnet::is_on_map($requrl)) { |
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my ($ltiscope,$ltiuri); |
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if (($env{'request.lti.login'}) && ($env{'request.lti.uri'})) { |
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my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'}; |
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my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'}; |
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($ltiscope,$ltiuri) = &LONCAPA::ltiutils::lti_provider_scope($env{'request.lti.uri'},$cdom,$cnum); |
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} |
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@crumbs = (); |
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unless ($ltiscope eq 'resource') { |
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unless ($ltiscope eq 'map') { |
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@crumbs = ({text => $crstype.' Contents', |
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href => "javascript:gopost('/adm/navmaps','')"}); |
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} |
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my $res = $navmap->getResourceByUrl($mapurl); |
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if (ref($res)) { |
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my $symb = $res->symb(); |
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if ($symb) { |
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my ($parent) = &Apache::lonnet::decode_symb($res->symb()); |
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if (($parent ne $env{'course.'.$env{'request.course.id'}.'.url'}) && |
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!(($ltiscope eq 'map') && ($requrl eq $ltiuri))) { |
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my @mapcrumbs = $navmap->recursed_crumbs($parent); |
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if (@mapcrumbs) { |
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push(@crumbs,@mapcrumbs); |
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} |
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} |
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$env{'request.symb'} = $symb; |
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} |
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} |
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} |
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push(@crumbs,{text => $maptitle, no_mt => 1}); |
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$args = {'bread_crumbs' => \@crumbs, |
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'bread_crumbs_nomenu' => 1, |
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'no_auto_mt_title' => 1}; |
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$r->print(&Apache::loncommon::start_page($maptitle,undef,$args)); |
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my $renderArgs = { 'cols' => [0,1,2,3], |
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'url' => $mapurl, |
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'navmap' => $navmap, |
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'suppressNavmap' => 1, |
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'suppressEmptySequences' => 1, |
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'filterFunc' => undef, |
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'resource_no_folder_link' => 1, |
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'r' => $r, |
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'caller' => 'sequence', |
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'notools' => 1, |
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'iterator_map' => $mapurl, |
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}; |
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my $render = &Apache::lonnavmaps::render($renderArgs); |
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# If no resources were found let the user know. |
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if ($renderArgs->{'counter'} == 0) { |
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$r->print('<p class="LC_info">'. |
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&mt('No items found in folder'). |
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'</p>'); |
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} |
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$r->print(&Apache::loncommon::end_page()); |
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} else { |
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$r->print(&Apache::loncommon::start_page($maptitle,undef,$args). |
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'<p class="LC_info">'. |
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&mt('Folder no longer appears to be a part of the course'). |
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'</p>'. |
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&Apache::loncommon::end_page()); |
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} |
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} else { |
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$r->print(&Apache::loncommon::start_page($maptitle,undef,$args). |
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'<p class="LC_warning">'. |
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&mt('Error: could not determine contents of folder'). |
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'</p>'. |
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&Apache::loncommon::end_page()); |
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} |
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$r->rflush(); |
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return OK; |
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} |
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} |
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my %hash; |
my %hash; |
my %bighash; |
my %bighash; |
my $requrl=$r->uri; |
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$successtied=0; |
# ------------------------------------------------------------ Tie symb db file |
# ------------------------------------------------------------ Tie symb db file |
if ($ENV{'request.course.fn'}) { |
my $disurl=''; |
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my $dismapid=''; |
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my $exitdisid = ''; |
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my $arrow_dir = ''; |
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my $is_encrypted = ''; |
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if (($env{'request.course.fn'}) && (!$env{'form.forceselect'})) { |
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', |
&GDBM_READER,0640)) { |
&GDBM_READER(),0640)) { |
$last=$hash{'last_direction'}; |
$last=$hash{'last_direction'}; |
untie(%hash); |
untie(%hash); |
} |
} |
my $direction=''; |
my $direction=''; |
my $prevmap=''; |
my $prevmap=''; |
if ($last) { |
if ($last) { |
($prevmap,$direction)=(split(/\_\_\_/,$last)); |
($prevmap,undef,$direction)=&Apache::lonnet::decode_symb($last); |
} |
} |
# ------------------------------------------------------------- Tie big db file |
# ------------------------------------------------------------- Tie big db file |
if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db', |
if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db', |
&GDBM_READER,0640)) { |
&GDBM_READER(),0640)) { |
my $disid=''; |
my $disid=''; |
my $whatend=''; |
my $randomout =''; |
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if ($direction eq 'back') { |
if ($direction eq 'back') { |
$disid=$bighash{'map_finish_'.$requrl}; |
$disid=$bighash{'map_finish_'.$requrl}; |
$whatend='End'; |
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} else { |
} else { |
$disid=$bighash{'map_start_'.$requrl}; |
$disid=$bighash{'map_start_'.$requrl}; |
$whatend='Beginning'; |
} |
} |
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my $disurl=''; |
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my $dismapid=''; |
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if ($disid) { |
if ($disid) { |
$disurl=$bighash{'src_'.$disid}; |
$disurl=$bighash{'src_'.$disid}; |
$dismapid=(split(/\./,$disid))[1]; |
$dismapid=(split(/\./,$disid))[1]; |
} |
if (!$env{'request.role.adv'}) { |
my $symb=''; |
$randomout = $bighash{'randomout_'.$disid}; |
my $sequencetitle=''; |
$is_encrypted = $bighash{'encrypted_'.$disid}; |
unless($disurl) { |
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if ($symb=&Apache::lonnet::symbread()) { |
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my ($mapurl,$mapid)=split(/\_\_\_/,$symb); |
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$sequencetitle=$bighash{'title_'. |
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$bighash{'map_pc_/res/'.$mapurl}.'.'. |
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$mapid}; |
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} |
} |
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} elsif (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db', |
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&GDBM_READER(),0640)) { |
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$last=$hash{'last_known'}; |
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untie(%hash); |
} |
} |
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# ----------- If this is an empty one, or hidden, skip to next non-empty or non-hidden one |
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while ( ((!$disurl) && ($disid)) || ($randomout && $disid) ) { |
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$direction=($direction?$direction:'forward'); |
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($disid,$requrl)= |
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&Apache::lonpageflip::fullmove($disid, |
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&Apache::lonnet::declutter($requrl),$direction); |
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if ($disid) { |
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$disurl=$bighash{'src_'.$disid}; |
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$dismapid=(split(/\./,$disid))[1]; |
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if (!$env{'request.role.adv'}) { |
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$randomout = $bighash{'randomout_'.$disid}; |
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$is_encrypted = $bighash{'encrypted_'.$disid}; |
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} |
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} |
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} |
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$exitdisid = $disid; |
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$arrow_dir = $direction; |
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# --------------------------------------- Untie hash, make sure to come by here |
# --------------------------------------- Untie hash, make sure to come by here |
untie(%bighash); |
untie(%bighash); |
if ($disurl) { |
} |
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} |
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# now either disurl is set (going to first page), or we need another display |
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if ($disurl) { |
# -------------------------------------------------- Has first or last resource |
# -------------------------------------------------- Has first or last resource |
&Apache::lonnet::symblist($requrl,$disurl => $dismapid, |
my $showdisurl = $disurl; |
'last_known' => &Apache::lonnet::declutter($disurl)); |
if ($is_encrypted) { |
$r->content_type('text/html'); |
$showdisurl = &Apache::lonenc::encrypted($disurl); |
$r->header_out(Location => 'http://'.$ENV{'HTTP_HOST'}.$disurl); |
} |
return REDIRECT; |
if ($disurl =~ m{^/adm/navmaps(\?|$)}) { |
} else { |
&Apache::lonnet::symblist($requrl,$disurl => [$disurl,$dismapid]); |
# ---------- Does not have first or last resource, try to find out where we are |
} else { |
unless ($symb) { |
&Apache::lonnet::symblist($requrl,$disurl => [$disurl,$dismapid], |
$r->internal_redirect('/adm/ambiguous'); |
'last_known' => [$disurl,$dismapid]); |
} |
} |
$r->content_type('text/html'); |
&Apache::loncommon::content_type($r,'text/html'); |
$r->send_http_header; |
$r->header_out(Location => &Apache::lonnet::absolute_url(). |
$r->print(<<ENDSYMB); |
$showdisurl); |
<html><body bgcolor="#FFFFFF"> |
return REDIRECT; |
<h2>$whatend of</h2> |
} else { |
<h1>$sequencetitle</h1> |
&Apache::loncommon::content_type($r,'text/html'); |
</body></html> |
$r->send_http_header; |
ENDSYMB |
if ($exitdisid eq '' && $arrow_dir ne '') { |
return OK |
my %lt =&Apache::lonlocal::texthash( |
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'nere' => 'Next resource could not be displayed', |
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'goba' => 'Go Back', |
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'nacc' => 'Course Contents', |
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); |
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if (&Apache::loncommon::course_type() eq 'Community') { |
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$lt{'nav'} = &mt('Community Contents'); |
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} |
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my $warnmsg; |
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if ($arrow_dir eq 'forward') { |
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$warnmsg = &mt('As all folders and sequences ' |
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.'following the current resource were empty, ' |
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.'you have now reached the end of the course.'); |
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} elsif ($arrow_dir eq 'back') { |
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$warnmsg = &mt('As all folders and sequences ' |
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.'preceding the current resource were empty, ' |
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.'you have now reached the beginning of the course.'); |
} |
} |
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my $start_page= |
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&Apache::loncommon::start_page('Empty Folder/Sequence'); |
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my $end_page= |
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&Apache::loncommon::end_page(); |
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$r->print(<<ENDNONE); |
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$start_page |
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<h3>$lt{'nere'}</h3> |
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<p>$warnmsg</p> |
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<ul> |
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<li><a href="javascript:history.go(-1)">$lt{'goba'}</a></li> |
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<li><a href="/adm/navmaps">$lt{'nacc'}</a></li> |
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</ul> |
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$end_page |
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ENDNONE |
} else { |
} else { |
&getlost($r,'Could not access course structure.'); |
&viewmap($r,$requrl); |
return OK; |
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} |
} |
} else { |
return OK; |
$ENV{'user.error.msg'}="$requrl:bre:0:0:Course not initialized"; |
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return HTTP_NOT_ACCEPTABLE; |
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} |
} |
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return OK; |
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} |
} |
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1; |
1; |
__END__ |
__END__ |
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|
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=head1 NAME |
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Apache::lonsequence |
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|
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=head1 SYNOPSIS |
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|
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Handler for showing sequence objects of |
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educational resources. |
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This is part of the LearningOnline Network with CAPA project |
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described at http://www.lon-capa.org. |
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|
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=head1 SUBROUTINES |
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|
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=over |
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=item handler() |
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=item viewmap() |
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=item attemptread() |
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=item mapread() |
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=item start_fresh_session() |
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=back |
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=cut |
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