--- rat/lonpageflip.pm 2006/05/30 19:47:40 1.69 +++ rat/lonpageflip.pm 2014/06/26 18:21:24 1.80.8.5 @@ -2,7 +2,7 @@ # # Page flip handler # -# $Id: lonpageflip.pm,v 1.69 2006/05/30 19:47:40 www Exp $ +# $Id: lonpageflip.pm,v 1.80.8.5 2014/06/26 18:21:24 raeburn Exp $ # # Copyright Michigan State University Board of Trustees # @@ -27,12 +27,16 @@ # 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::lonlocal; use HTML::TokeParser; use GDBM_File; @@ -86,6 +90,39 @@ sub hash_src { } sub move { + my ($next,$endupmap,$direction) = @_; + my $safecount=0; + my $allowed=0; + do { + ($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 $priv = &Apache::lonnet::allowed('bre',$url,$symb); + $allowed = (($priv eq 'F') || ($priv eq '2')); + } + $safecount++; + } while ( ($next) + && ($next!~/\,/) + && ( + (!$hash{'src_'.$next}) + || ( + (!$env{'request.role.adv'}) + && $hash{'randomout_'.$next} + ) + || (!$allowed) + ) + && ($safecount<10000)); + + return ($next,$endupmap); +} + +sub get_next_possible_move { my ($rid,$mapurl,$direction)=@_; my $startoutrid=$rid; @@ -186,15 +223,15 @@ sub navlaunch { &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(&Apache::loncommon::start_page('Launched')); $r->print(<Goto first resource

Collapse external navigation window

ENDNAV @@ -206,11 +243,18 @@ sub first_accessible_resource { if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'.db', &GDBM_READER(),0640)) { $furl=$hash{'first_url'}; - if (!&Apache::lonnet::allowed('bre',$furl)) { + my %args; + my ($url,$args) = split(/\?/,$furl); + foreach my $pair (split(/\&/,$args)) { + my ($name,$value) = split(/=/,$pair); + $args{&unescape($name)} = &unescape($value); + } + if ((($env{'environment.remotenavmap'} eq 'on') && ($furl =~ m{^/adm/navmaps})) || + (!&Apache::lonnet::allowed('bre',$url,$args{'symb'}))) { # Wow, we cannot see this ... move forward to the next one that we can see my ($newrid,$newmap)=&move($hash{'first_rid'},$hash{'first_mapurl'},'forward'); # Build the new URL - my ($newresid,$newmapid)=split(/\./,$newrid); + 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}) { @@ -256,7 +300,7 @@ sub handler { my $furl=&first_accessible_resource(); &Apache::loncommon::content_type($r,'text/html'); $r->header_out(Location => - 'http://'.$ENV{'HTTP_HOST'}.$furl); + &Apache::lonnet::absolute_url().$furl); return REDIRECT; } @@ -283,19 +327,19 @@ sub handler { untie %hash; } else { $newloc='/adm/navmaps'; - } - if ($newloc eq '/adm/navmaps' && $direction eq 'navlaunch') { - &navlaunch($r); - return OK; - } else { + } + if (($newloc =~ m{^/adm/navmaps}) && ($direction eq 'navlaunch')) { + &navlaunch($r); + return OK; + } else { &Apache::loncommon::content_type($r,'text/html'); $r->header_out(Location => - 'http://'.$ENV{'HTTP_HOST'}.$newloc); + &Apache::lonnet::absolute_url().$newloc); return REDIRECT; - } + } } - $currenturl=~s/^http\:\/\///; + $currenturl=~s/^https?\:\/\///; $currenturl=~s/^[^\/]+//; # # Is the current URL on the map? If not, start with last known URL @@ -310,15 +354,16 @@ sub handler { if ($last) { $currenturl=&Apache::lonnet::clutter((&Apache::lonnet::decode_symb($last))[2]); } else { - if ($direction eq 'return') { + if ($direction eq 'return') { &Apache::loncommon::content_type($r,'text/html'); $r->header_out(Location => - 'http://'.$ENV{'HTTP_HOST'}.'/adm/noidea.html'); + &Apache::lonnet::absolute_url(). + '/adm/noidea.html'); return REDIRECT; - } else { - &navlaunch($r); - return OK; - } + } else { + &navlaunch($r); + return OK; + } } } # ------------------------------------------- Do we have any idea where we are? @@ -340,14 +385,6 @@ 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) { @@ -399,24 +436,13 @@ 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' => $redirectsymb}); +# ------------------------------------- Check for and display critical messages + my ($redirect, $url) = &Apache::loncommon::critical_redirect(300); + unless ($redirect) { + $url=&Apache::lonnet::absolute_url().$redirecturl; + $url = &add_get_param($url, { 'symb' => $redirectsymb}); + } + &Apache::loncommon::content_type($r,'text/html'); $r->header_out(Location => $url); return REDIRECT; } else { @@ -427,13 +453,16 @@ sub handler { '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'); + if (&Apache::loncommon::course_type() eq 'Community') { + $lt{'nav'} = &mt('Community Contents'); + } if ($#possibilities>0) { my $start_page= &Apache::loncommon::start_page('Multiple Resources'); @@ -443,7 +472,7 @@ $start_page

$lt{'pick'}:

- +
ENDSTART foreach my $id (@possibilities) { @@ -459,21 +488,17 @@ ENDSTART } $r->print('
$lt{'titleheader'}$lt{'type'}
'); } else { - my $start_page= - &Apache::loncommon::start_page('No Resource'); - $r->print(<$lt{'title'} -

$lt{'explain'}

-ENDNONE + $r->print( + &Apache::loncommon::start_page('No Resource') + .'

'.$lt{'title'}.'

' + .'

'.$lt{'explain'}.'

'); } - $r->print(< -
  • $lt{'back'}
    • -
  • $lt{'nav'}
    • - -ENDMENU - $r->print(&Apache::loncommon::end_page()); + $r->print( + &Apache::lonhtmlcommon::actionbox( + [''.$lt{'back'}.'', + ''.$lt{'nav'}.'' + ]) + .&Apache::loncommon::end_page()); return OK; } } else { @@ -484,6 +509,7 @@ ENDMENU } else { # ---------------------------------------- No, could not determine where we are $r->internal_redirect('/adm/ambiguous'); + return OK; } } else { # -------------------------- Class was not initialized or page fliped strangely @@ -495,6 +521,46 @@ 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 navlaunch() + +=item first_accessible_resource() + +=item handler() + +=back + +=cut