--- rat/lonpageflip.pm 2006/03/19 23:06:00 1.67 +++ rat/lonpageflip.pm 2021/08/06 00:52:43 1.107 @@ -2,7 +2,7 @@ # # Page flip handler # -# $Id: lonpageflip.pm,v 1.67 2006/03/19 23:06:00 albertel Exp $ +# $Id: lonpageflip.pm,v 1.107 2021/08/06 00:52:43 raeburn Exp $ # # Copyright Michigan State University Board of Trustees # @@ -27,11 +27,18 @@ # http://www.lon-capa.org/ # + + package Apache::lonpageflip; use strict; +use LONCAPA; use Apache::Constants qw(:common :http REDIRECT); use Apache::lonnet; +use Apache::loncommon(); +use Apache::lonnavmaps(); +use Apache::lonuserstate; +use Apache::lonlocal; use HTML::TokeParser; use GDBM_File; @@ -77,36 +84,136 @@ sub hash_src { my ($mapid,$resid)=split(/\./,$id); my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid}, $resid,$hash{'src_'.$id}); + my $anchor; + if ($hash{'ext_'.$id} eq 'true:') { + if ($hash{'src_'.$id} =~ /(\#.+)$/) { + $anchor = $1; + } + } if ($hash{'encrypted_'.$id}) { return (&Apache::lonenc::encrypted($hash{'src_'.$id}), - &Apache::lonenc::encrypted($symb)); + &Apache::lonenc::encrypted($symb), + $hash{'encrypted_'.$id},$anchor); } - return ($hash{'src_'.$id},$symb); + return ($hash{'src_'.$id},$symb,$hash{'encrypted_'.$id},$anchor); } -# Inputs are a url, adn a hash ref of -# form name => value pairs -# takes care of properly adding the form name elements and values to the -# the url doing proper escaping of the values and joining with ? or & as -# needed - -sub add_get_param { - my ($url,$form_data) = @_; - my $needs_question_mark = ($url !~ /\?/); - - while (my ($name,$value) = each(%$form_data)) { - if ($needs_question_mark) { - $url.='?'; - $needs_question_mark = 0; - } else { - $url.='&'; +sub move { + my ($next,$endupmap,$direction,$firstres) = @_; + my $safecount=0; + my $allowed=0; + my $deeplinkonly=0; + my $deeplinkchecked; + my $deeplink_login_pc; + my $prev=$next; + my ($prevmapid)=split(/\./,$next); + do { + ($next,$endupmap)=&get_next_possible_move($next,$endupmap,$direction); + + my $url = $hash{'src_'.$next}; + my ($mapid,$resid)=split(/\./,$next); + my $symb = &Apache::lonnet::encode_symb($hash{'map_id_'.$mapid}, + $resid,$url); + if ($url eq '' || $symb eq '') { + $allowed = 0; + } else { + my $nodeeplinkcheck = 0; + if ($hash{'is_map_'.$next}) { + $nodeeplinkcheck = 1; + } + my $priv = &Apache::lonnet::allowed('bre',$url,$symb,'','','','',$nodeeplinkcheck); + $allowed = (($priv eq 'F') || ($priv eq '2') || ($priv eq 'A')); } - $url.=$name.'='.&Apache::lonnet::escape($form_data->{$name}); - } - return $url; + $deeplinkonly = 0; + if ($hash{'deeplinkonly_'.$next}) { + my ($value,$level) = split(/:/,$hash{'deeplinkonly_'.$next}); + my ($listed,$scope,$access) = split(/,/,$value); + unless (($access eq 'any') || ($hash{'is_map_'.$next})) { + if ($level eq 'resource') { + $deeplinkonly = 1; + } elsif ($level eq 'map') { + if ($scope eq 'rec') { + unless ($mapid == $prevmapid) { + unless ($deeplinkchecked) { + $deeplink_login_pc = &get_deeplink_login_pc(); + $deeplinkchecked = 1; + } + if ($deeplink_login_pc) { + my $poss_map_pc; + if ($hash{'is_map_'.$next}) { + $poss_map_pc = $hash{'map_pc_'.$url}; + } else { + $poss_map_pc = $hash{'map_pc_'.$hash{'map_id_'.$mapid}}; + } + unless ($deeplink_login_pc == $poss_map_pc) { + unless (grep(/^$deeplink_login_pc$/,split(/,/,$hash{'map_hierarchy_'.$poss_map_pc}))) { + $deeplinkonly = 1; + } + } + } else { + $deeplinkonly = 1; + } + } + } elsif ($mapid != $prevmapid) { + $deeplinkonly = 1; + } + } + } + } elsif (($hash{'deeplinkonly_'.$prev}) && (!$firstres)) { + my ($value,$level) = split(/:/,$hash{'deeplinkonly_'.$prev}); + my ($listed,$scope,$access) = split(/,/,$value); + unless (($access eq 'any') || ($hash{'is_map_'.$prev})) { + if ($level eq 'resource') { + $deeplinkonly = 1; + } elsif ($level eq 'map') { + my ($listed,$scope,$access) = split(/,/,$value); + if ($scope eq 'rec') { + unless ($mapid == $prevmapid) { + unless ($deeplinkchecked) { + $deeplink_login_pc = &get_deeplink_login_pc(); + $deeplinkchecked = 1; + } + if ($deeplink_login_pc) { + my $poss_map_pc; + if ($hash{'is_map_'.$prev}) { + $poss_map_pc = $hash{'map_pc_'.$url}; + } else { + $poss_map_pc = $hash{'map_pc_'.$hash{'map_id_'.$mapid}}; + } + unless ($deeplink_login_pc == $poss_map_pc) { + unless (grep(/^$deeplink_login_pc$/,split(/,/,$hash{'map_hierarchy_'.$poss_map_pc}))) { + $deeplinkonly = 1; + } + } + } + } + } else { + if ($mapid != $prevmapid) { + $deeplinkonly = 1; + } + } + } + } + } + $safecount++; + } while ( ($next) + && ($next!~/\,/) + && ( + (!$hash{'src_'.$next}) + || ( + (!$env{'request.role.adv'}) + && (($hash{'randomout_'.$next}) + || ($deeplinkonly) + || ($hash{'deeplinkout_'.$next})) + ) + || (!$allowed) + ) + && ($safecount<10000)); + + return ($next,$endupmap); } -sub move { +sub get_next_possible_move { my ($rid,$mapurl,$direction)=@_; my $startoutrid=$rid; @@ -132,7 +239,7 @@ sub move { } if ($thiscond>$mincond) { $mincond=$thiscond; } } - } + } foreach my $id (split(/\,/,$posnext)) { my ($linkid,$condval)=split(/\:/,$id); if ($condval>=$mincond) { @@ -174,7 +281,7 @@ sub move { } if ($thiscond>$mincond) { $mincond=$thiscond; } } - } + } foreach my $id (split(/\,/,$posnext)) { my ($linkid,$condval)=split(/\:/,$id); if ($condval>=$mincond) { @@ -202,25 +309,141 @@ sub move { return ($next,$mapurl); } -sub navlaunch { - my ($r)=@_; - &Apache::loncommon::content_type($r,'text/html'); - &Apache::loncommon::no_cache($r); - $r->send_http_header; - $r->print(&Apache::loncommon::start_page('Launched')); - $r->print(<Goto first resource

- -

Collapse external navigation window

-ENDNAV - $r->print(&Apache::loncommon::end_page()); + my $priv = &Apache::lonnet::allowed('bre',$url,$args{'symb'}); + my $allowed = (($priv eq 'F') || ($priv eq '2') || ($priv eq 'A')); + if (!$allowed) { +# Wow, we cannot see this ... move forward to the next one that we can see + my ($newrid,$newmap)=&move($hash{'first_rid'},$hash{'first_mapurl'},'forward',1); +# Build the new URL + if ($newrid eq '') { + $furl = '/adm/navmaps'; + } else { + my ($newmapid,$newresid)=split(/\./,$newrid); + my $symb=&Apache::lonnet::encode_symb($newmap,$newresid,$hash{'src_'.$newrid}); + $furl=&add_get_param($hash{'src_'.$newrid},{ 'symb' => $symb }); + if ($hash{'encrypted_'.$newrid}) { + $furl=&Apache::lonenc::encrypted($furl); + } + } + } + untie(%hash); + return $furl; + } else { + return '/adm/navmaps'; + } +} + +sub first_answerable_ressymb { + my $navmap = Apache::lonnavmaps::navmap->new; + return unless (ref($navmap)); + my $iterator = $navmap->getIterator(undef,undef,undef,1); + return unless (ref($iterator)); + my ($curRes,$result); + while ($curRes = $iterator->next()) { + if (ref($curRes) && $curRes->is_problem()) { + foreach my $part (@{$curRes->parts()}) { + if ($curRes->tries($part) < $curRes->maxtries($part)) { + $result = $curRes->link().'?symb='.$curRes->shown_symb(); + last; + } + } + } + } + if ($result) { + return $result; + } else { + return &first_accessible_resource(); + } +} + +sub check_http_req { + my ($srcref,$hostname) = @_; + return unless (ref($srcref) eq 'SCALAR'); + my $usehttp; + if ($env{'request.course.id'}) { + my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'}; + my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'}; + if (($$srcref =~ m{^\Q/public/$cdom/$cnum/syllabus\E($|\?)}) && + ($ENV{'SERVER_PORT'} == 443) && + ($env{'course.'.$env{'request.course.id'}.'.externalsyllabus'} =~ m{^http://})) { + unless ((&Apache::lonnet::uses_sts()) || + (&Apache::lonnet::waf_allssl($hostname))) { + $$srcref .= (($$srcref =~/\?/)? '&':'?') . 'usehttp=1'; + $usehttp = 1; + } + } elsif (($$srcref =~ m{^\Q/adm/wrapper/ext/\E(?!https:)}) && + ($ENV{'SERVER_PORT'} == 443)) { + unless ((&Apache::lonnet::uses_sts()) || + (&Apache::lonnet::waf_allssl($hostname))) { + my ($url,$anchor) = ($$srcref =~ /^([^\#]+)(?:|(\#[^\#]+))$/); + $$srcref = $url . (($$srcref =~/\?/)? '&':'?') . 'usehttp=1' .$anchor; + $usehttp = 1; + } + } + } + return $usehttp; } + +sub reinited_js { + my ($url,$cid,$timeout) = @_; + if (!$timeout) { + $timeout = 0; + } + return <<"END"; + +END +} + +sub get_deeplink_login_pc { + my $deeplink_login_pc; + if (($env{'request.deeplink.login'}) && ($env{'request.course.id'})) { + my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'}; + my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'}; + if ($env{'request.deeplink.login'}) { + my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'}; + my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'}; + my $deeplink_symb = &Apache::loncommon::deeplink_login_symb($cnum,$cdom); + if ($deeplink_symb) { + my $loginmap; + if ($deeplink_symb =~ /\.(page|sequence)$/) { + $loginmap = &Apache::lonnet::clutter((&Apache::lonnet::decode_symb($deeplink_symb))[2]); + } else { + $loginmap = &Apache::lonnet::clutter((&Apache::lonnet::decode_symb($deeplink_symb))[0]); + } + $deeplink_login_pc = $hash{'map_pc_'.$loginmap}; + } + } + } + return $deeplink_login_pc; +} + # ================================================================ Main Handler sub handler { @@ -237,95 +460,189 @@ sub handler { my %cachehash=(); my $multichoice=0; my %multichoicehash=(); - my ($redirecturl,$redirectsymb); + my %prog_state=(); + my ($redirecturl,$redirectsymb,$enc,$anchor,$deeplinklevel); my $next=''; + my $hostname = $r->hostname(); my @possibilities=(); &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['postdata']); if (($env{'form.postdata'})&&($env{'request.course.fn'})) { - $env{'form.postdata'}=~/(\w+)\:(.*)/; - my $direction=$1; - my $currenturl=$2; + my ($direction,$currenturl) = ($env{'form.postdata'}=~/(\w+)\:(.*)/); if ($currenturl=~m|^/enc/|) { - $currenturl=&Apache::lonenc::unencrypted($currenturl); + $currenturl=&Apache::lonenc::unencrypted($currenturl); } $currenturl=~s/\.\d+\.(\w+)$/\.$1/; + $currenturl=~s/^https?\:\/\///; + $currenturl=~s/^[^\/]+//; + my ($preupdatepos,$last,$reinitcheck); + if ($direction eq 'return') { + if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db', + &GDBM_READER(),0640)) { + $last=$hash{'last_known'}; + untie(%hash); + } + } elsif ($direction eq 'firstanswerable') { + my $furl = &first_answerable_ressymb(); + my $usehttp = &check_http_req(\$furl,$hostname); + if (($usehttp) && ($hostname ne '')) { + $furl='http://'.$hostname.$furl; + } else { + $furl=&Apache::lonnet::absolute_url().$furl; + } + &Apache::loncommon::content_type($r,'text/html'); + $r->header_out(Location => $furl); + return REDIRECT; + } elsif ($direction eq 'endplacement') { + &Apache::loncommon::content_type($r,'text/html'); + $r->send_http_header; + $r->print(&Apache::lonplacementtest::showresult()); + return OK; + } + if ($env{'request.course.id'}) { + # Check if course needs to be re-initialized + my $loncaparev = $r->dir_config('lonVersion'); + ($reinitcheck,my @reinit) = &Apache::loncommon::needs_coursereinit($loncaparev); + if ($reinitcheck eq 'switch') { + &Apache::loncommon::content_type($r,'text/html'); + $r->send_http_header; + $r->print(&Apache::loncommon::check_release_result(@reinit)); + return OK; + } elsif ($reinitcheck eq 'update') { + my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'}; + my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'}; + $preupdatepos = &Apache::lonnet::symbread($currenturl); + unless ($direction eq 'return') { + if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db', + &GDBM_READER(),0640)) { + $last=$hash{'last_known'}; + untie(%hash); + } + } + &Apache::loncommon::content_type($r,'text/html'); + $r->send_http_header; + $r->print(&Apache::loncommon::start_page('Content Changed')); + my $preamble = '
'. + '
'. + &mt('Your course session is being updated because of recent changes by course personnel.'). + ' '.&mt('Please be patient').'.
'. + '
'; + %prog_state = &Apache::lonhtmlcommon::Create_PrgWin($r,undef,$preamble); + &Apache::lonhtmlcommon::Update_PrgWin($r,\%prog_state,&mt('Updating course')); + my ($furl,$ferr) = &Apache::lonuserstate::readmap("$cdom/$cnum"); + &Apache::lonhtmlcommon::Update_PrgWin($r,\%prog_state,&mt('Finished!')); + if ($ferr) { + &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state); + my $requrl = $r->uri; + $env{'user.error.msg'}="$requrl:bre:0:0:Course not initialized"; + $env{'user.reinit'} = 1; + return HTTP_NOT_ACCEPTABLE; + } else { + if ($last) { + my ($murl,$id,$fn)=&Apache::lonnet::decode_symb($last); + unless (&Apache::lonnet::symbverify($last,$fn)) { + undef($last); + } + } + } + } + } if ($direction eq 'firstres') { - my $furl; - if (tie(my %bighash,'GDBM_File',$env{'request.course.fn'}.'.db', - &GDBM_READER(),0640)) { - $furl=$bighash{'first_url'}; - untie(%bighash); - } - &Apache::loncommon::content_type($r,'text/html'); - $r->header_out(Location => - 'http://'.$ENV{'HTTP_HOST'}.$furl); - - return REDIRECT; + my $furl=&first_accessible_resource(); + my $usehttp = &check_http_req(\$furl,$hostname); + if (($usehttp) && ($hostname ne '')) { + $furl='http://'.$hostname.$furl; + } else { + $furl=&Apache::lonnet::absolute_url().$furl; + } + if ($reinitcheck eq 'update') { + &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state); + $r->print(&reinited_js($furl,$env{'request.course.id'},100)); + $r->print(&Apache::loncommon::end_page()); + return OK; + } else { + &Apache::loncommon::content_type($r,'text/html'); + $r->header_out(Location => $furl); + return REDIRECT; + } } - if ($direction eq 'return' || $direction eq 'navlaunch') { + if ($direction eq 'return') { # -------------------------------------------------------- Return to last known - my $last; - if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db', - &GDBM_READER(),0640)) { - $last=$hash{'last_known'}; - untie(%hash); - } - my $newloc; + my ($newloc,$usehttp); if (($last) && (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'.db', &GDBM_READER(),0640))) { my ($murl,$id,$fn)=&Apache::lonnet::decode_symb($last); $id=$hash{'map_pc_'.&Apache::lonnet::clutter($murl)}.'.'.$id; $newloc=$hash{'src_'.$id}; if ($newloc) { - if ($hash{'encrypted_'.$id}) { $newloc=&Apache::lonenc::encrypted($newloc); } - + $usehttp = &check_http_req(\$newloc,$hostname); + if ($hash{'encrypted_'.$id}) { + $newloc=&Apache::lonenc::encrypted($newloc); + } + if ($newloc =~ m{^(/adm/wrapper/ext/[^\#]+)(?:|(\#[^\#]+))$}) { + my ($url,$anchor) = ($1,$2); + if ($anchor) { + $newloc = $url.(($url=~/\?/)?'&':'?').'symb='.&escape($last).$anchor; + } + } } else { $newloc='/adm/navmaps'; } untie %hash; } else { $newloc='/adm/navmaps'; - } - if ($newloc eq '/adm/navmaps' && $direction eq 'navlaunch') { - &navlaunch($r); - return OK; - } else { + } + if (($usehttp) && ($hostname ne '')) { + $newloc='http://'.$hostname.$newloc; + } else { + $newloc=&Apache::lonnet::absolute_url().$newloc + } + if ($reinitcheck eq 'update') { + $r->print(&reinited_js($newloc,$env{'request.course.id'},100)); + $r->print(&Apache::loncommon::end_page()); + return OK; + } else { &Apache::loncommon::content_type($r,'text/html'); - $r->header_out(Location => - 'http://'.$ENV{'HTTP_HOST'}.$newloc); - + $r->header_out(Location => $newloc); return REDIRECT; - } + } } - $currenturl=~s/^http\:\/\///; - $currenturl=~s/^[^\/]+//; # # Is the current URL on the map? If not, start with last known URL # + unless (&Apache::lonnet::is_on_map($currenturl)) { - my $last; - if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db', - &GDBM_READER(),0640)) { - $last=$hash{'last_known'}; + if ($preupdatepos) { + undef($preupdatepos); + } elsif (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db', + &GDBM_READER(),0640)) { + $last=$hash{'last_known'}; untie(%hash); } if ($last) { $currenturl=&Apache::lonnet::clutter((&Apache::lonnet::decode_symb($last))[2]); } else { - if ($direction eq 'return') { - &Apache::loncommon::content_type($r,'text/html'); - $r->header_out(Location => - 'http://'.$ENV{'HTTP_HOST'}.'/adm/noidea.html'); - return REDIRECT; - } else { - &navlaunch($r); - return OK; - } + my $newloc = &Apache::lonnet::absolute_url(). + '/adm/navmaps'; + if ($reinitcheck eq 'update') { + &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state); + $r->print(&reinited_js($newloc,$env{'request.course.id'},100)); + $r->print(&Apache::loncommon::end_page()); + return OK; + } else { + &Apache::loncommon::content_type($r,'text/html'); + $r->header_out(Location => $newloc); + return REDIRECT; + } } } # ------------------------------------------- Do we have any idea where we are? my $position; - if ($position=Apache::lonnet::symbread($currenturl)) { + if ($preupdatepos) { + $position = $preupdatepos; + } else { + $position=Apache::lonnet::symbread($currenturl); + } + if ($position) { # ------------------------------------------------------------------------- Yes my ($startoutmap,$mapnum,$thisurl)=&Apache::lonnet::decode_symb($position); $cachehash{$startoutmap}{$thisurl}=[$thisurl,$mapnum]; @@ -342,21 +659,13 @@ sub handler { my $endupmap; ($next,$endupmap)=&move($rid,$startoutmap,$direction); # -------------------------------------- Do we have one and only one empty URL? - my $safecount=0; - while (($next) && ($next!~/\,/) && - ((!$hash{'src_'.$next}) || - ((!$env{'request.role.adv'}) && $hash{'randomout_'.$next})) - && ($safecount<10000)) { - ($next,$endupmap)=&move($next,$endupmap,$direction); - $safecount++; - } # We are now at at least one non-empty URL # ----------------------------------------------------- Check out possibilities if ($next) { @possibilities=split(/\,/,$next); if ($#possibilities==0) { # ---------------------------------------------- Only one possibility, redirect - ($redirecturl,$redirectsymb)=&hash_src($next); + ($redirecturl,$redirectsymb,$enc,$anchor)=&hash_src($next); $cachehash{$endupmap}{$redirecturl}= [$redirecturl,(split(/\./,$next))[1]]; } else { @@ -381,12 +690,20 @@ sub handler { } else { # -------------------------------------------------------------- No place to go $multichoice=-1; + if ($position && $env{'request.deeplink.login'}) { + my ($map,$resid,$url) = &Apache::lonnet::decode_symb($position); + my $mapid = $hash{'map_pc_'.&Apache::lonnet::clutter($map)}; + my $position_deeplink = $hash{'deeplinkonly_'.$mapid.'.'.$resid}; + if ($position_deeplink) { + (my $value,$deeplinklevel) = split(/:/,$position_deeplink); + } + } } # ----------------- The program must come past this point to untie the big hash untie(%hash); # --------------------------------------------------------- Store position info $cachehash{$startoutmap}{'last_direction'}=[$direction,'notasymb']; - foreach my $thismap (keys %cachehash) { + foreach my $thismap (keys(%cachehash)) { my $mapnum=$cachehash{$thismap}->{'mapnum'}; delete($cachehash{$thismap}->{'mapnum'}); &Apache::lonnet::symblist($thismap, @@ -401,41 +718,62 @@ sub handler { if ($direction eq 'back') { &Apache::lonnet::linklog($redirecturl,$currenturl); } -# ------------------------------------------------- Check for critical messages - if ((time-$env{'user.criticalcheck.time'})>300) { - my @what=&Apache::lonnet::dump - ('critical',$env{'user.domain'}, - $env{'user.name'}); - if ($what[0]) { - if (($what[0] ne 'con_lost') && - ($what[0]!~/^error\:/)) { - $redirecturl='/adm/email?critical=display'; - $redirectsymb=''; - } - } - &Apache::lonnet::appenv('user.criticalcheck.time'=>time); - } - - &Apache::loncommon::content_type($r,'text/html'); - my $url='http://'.$ENV{'HTTP_HOST'}.$redirecturl; - $url = &add_get_param($url, { 'symb' => $redirectsymb}); - $r->header_out(Location => $url); - return REDIRECT; +# ------------------------------------- Check for and display critical messages + my ($redirect, $url) = &Apache::loncommon::critical_redirect(300,'flip'); + unless ($redirect) { + my $usehttp = &check_http_req(\$redirecturl,$hostname); + if (($usehttp) && ($hostname ne '')) { + $url='http://'.$hostname.$redirecturl; + } else { + $url=&Apache::lonnet::absolute_url().$redirecturl; + } + my $addanchor; + if (($anchor ne '') && (!$enc || $env{'request.role.adv'})) { + $addanchor = 1; + $url =~ s/\#.+$//; + } + $url = &add_get_param($url, { 'symb' => $redirectsymb}); + if ($addanchor) { + $url .= $anchor; + } + } + if ($reinitcheck eq 'update') { + &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state); + $r->print(&reinited_js($url,$env{'request.course.id'},100)); + $r->print(&Apache::loncommon::end_page()); + return OK; + } else { + &Apache::loncommon::content_type($r,'text/html'); + $r->header_out(Location => $url); + return REDIRECT; + } } else { # --------------------------------------------------------- There was a problem &Apache::loncommon::content_type($r,'text/html'); $r->send_http_header; my %lt=&Apache::lonlocal::texthash('title' => 'End of Sequence', + 'deeplink' => 'No link available', + 'deeplinkres' => + 'Navigation to other content is unavailable when accessing content via deep-linking', + 'deeplinkmap' => + 'You have reached the end of the sequence of available materials for access via deep-linking', 'explain' => 'You have reached the end of the sequence of materials.', 'back' => 'Go Back', - 'nav' => 'Navigate Course Content', + 'nav' => 'Course Contents', 'wherenext' => 'There are several possibilities of where to go next', 'pick' => 'Please click on the the resource you intend to access', 'titleheader' => 'Title', - 'type' => 'Type'); + 'type' => 'Type', + 'update' => 'Content updated', + 'expupdate' => 'As a result of a recent update to the sequence of materials, it is not possible to complete the page flip.', + 'gonav' => 'Go to the Contents page to select a resource to display.', + ); + if (&Apache::loncommon::course_type() eq 'Community') { + $lt{'nav'} = &mt('Community Contents'); + } if ($#possibilities>0) { my $start_page= &Apache::loncommon::start_page('Multiple Resources'); @@ -445,13 +783,18 @@ $start_page

$lt{'pick'}:

- +
ENDSTART foreach my $id (@possibilities) { + my $src = $multichoicehash{'src_'.$id}; + my $usehttp = &check_http_req(\$src,$hostname); + if (($usehttp) && ($hostname ne '')) { + $src = 'http://'.$hostname.$src; + } $r->print( '
$lt{'titleheader'}$lt{'type'}
'. @@ -461,31 +804,86 @@ ENDSTART } $r->print('
'); } else { - my $start_page= - &Apache::loncommon::start_page('No Resource'); - $r->print(<$lt{'title'} -

$lt{'explain'}

-ENDNONE + if ($reinitcheck) { + if (&Apache::loncommon::course_type() eq 'Community') { + $r->print( + &Apache::loncommon::start_page('Community Contents Updated')); + } else { + $r->print( + &Apache::loncommon::start_page('Course Contents Updated')); + } + $r->print('

'.$lt{'update'}.'

' + .'

'.$lt{'expupdate'}.'
' + .$lt{'gonav'}.'

'); + } else { + if (($env{'course.'.$env{'request.course.id'}.'.type'} eq 'Placement') && + (!$env{'request.role.adv'})) { + my ($score,$incomplete) = &Apache::lonplacementtest::check_completion(undef,undef,1); + if ($incomplete) { + $r->print(&Apache::lonplacementtest::showincomplete($incomplete)); + } else { + $r->print(&Apache::lonplacementtest::showresult(1)); + } + } else { + $r->print( + &Apache::loncommon::start_page('No Resource')); + if ($deeplinklevel eq 'resource') { + $r->print('

'.$lt{'deeplink'}.'

' + .'

'.$lt{'deeplinkres'}.'

'); + } elsif ($deeplinklevel eq 'map') { + $r->print('

'.$lt{'title'}.'

' + .'

'.$lt{'deeplinkmap'}.'

'); + } else { + $r->print('

'.$lt{'title'}.'

' + .'

'.$lt{'explain'}.'

'); + } + } + } } - $r->print(< -
  • $lt{'back'}
    • -
  • $lt{'nav'}
    • - -ENDMENU + unless (($env{'course.'.$env{'request.course.id'}.'.type'} eq 'Placement') || + ($env{'request.role.adv'})) { + if ($deeplinklevel) { + $r->print( + &Apache::lonhtmlcommon::actionbox( + [''.$lt{'back'}.''])); + } elsif ((!@possibilities) && ($reinitcheck)) { + $r->print( + &Apache::lonhtmlcommon::actionbox( + [''.$lt{'nav'}.'' + ])); + } else { + $r->print( + &Apache::lonhtmlcommon::actionbox( + [''.$lt{'back'}.'', + ''.$lt{'nav'}.'' + ])); + } + + } $r->print(&Apache::loncommon::end_page()); + return OK; } } else { # ------------------------------------------------- Problem, could not tie hash + if ($reinitcheck eq 'update') { + &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state); + $r->print(&Apache::loncommon::end_page()); + } $env{'user.error.msg'}="/adm/flip:bre:0:1:Course Data Missing"; return HTTP_NOT_ACCEPTABLE; } } else { # ---------------------------------------- No, could not determine where we are - $r->internal_redirect('/adm/ambiguous'); + my $newloc = '/adm/ambiguous'; + if ($reinitcheck eq 'update') { + &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state); + $r->print(&reinited_js($newloc,$env{'request.course.id'},100)); + $r->print(&Apache::loncommon::end_page()); + } else { + $r->internal_redirect($newloc); + } + return OK; } } else { # -------------------------- Class was not initialized or page fliped strangely @@ -497,6 +895,44 @@ ENDMENU 1; __END__ +=pod + +=head1 NAME + +Apache::lonpageflip + +=head1 SYNOPSIS + +Deals with forward, backward, and other page flips. + +This is part of the LearningOnline Network with CAPA project +described at http://www.lon-capa.org. + +=head1 OVERVIEW + +(empty) + +=head1 SUBROUTINES + +=over cleanup() + +=item addrid() + +=item fullmove() + +=item hash_src() + +=item move() + +=item get_next_possible_move() + +=item first_accessible_resource() + +=item handler() + +=back + +=cut 500 Internal Server Error

    Internal Server Error

    The server encountered an internal error or misconfiguration and was unable to complete your request.

    Please contact the server administrator at root@localhost to inform them of the time this error occurred, and the actions you performed just before this error.

    More information about this error may be available in the server error log.