--- rat/lonpageflip.pm 2003/01/14 18:47:50 1.34
+++ rat/lonpageflip.pm 2020/09/08 04:37:22 1.80.8.11.2.1
@@ -2,7 +2,7 @@
#
# Page flip handler
#
-# $Id: lonpageflip.pm,v 1.34 2003/01/14 18:47:50 www Exp $
+# $Id: lonpageflip.pm,v 1.80.8.11.2.1 2020/09/08 04:37:22 raeburn Exp $
#
# Copyright Michigan State University Board of Trustees
#
@@ -26,23 +26,18 @@
#
# http://www.lon-capa.org/
#
-# (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)
-#
-# 10/03,10/05,10/06,10/07,10/09,10/10,10/11,10/16,10/17,
-# 11/14,11/16,
-# 10/01/01,05/01,05/28,07/05 Gerd Kortemeyer
+
+
package Apache::lonpageflip;
use strict;
+use LONCAPA;
use Apache::Constants qw(:common :http REDIRECT);
-use Apache::lonnet();
+use Apache::lonnet;
+use Apache::loncommon();
+use Apache::lonuserstate;
+use Apache::lonlocal;
use HTML::TokeParser;
use GDBM_File;
@@ -57,6 +52,7 @@ sub cleanup {
&Apache::lonnet::logthis('Failed cleanup pageflip: hash');
}
}
+ return OK;
}
sub addrid {
@@ -74,7 +70,7 @@ sub addrid {
sub fullmove {
my ($rid,$mapurl,$direction)=@_;
- if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
+ if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'.db',
&GDBM_READER(),0640)) {
($rid,$mapurl)=&move($rid,$mapurl,$direction);
untie(%hash);
@@ -82,7 +78,59 @@ sub fullmove {
return($rid,$mapurl);
}
+sub hash_src {
+ my ($id)=@_;
+ my ($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),
+ $hash{'encrypted_'.$id},$anchor);
+ }
+ return ($hash{'src_'.$id},$symb,$hash{'encrypted_'.$id},$anchor);
+}
+
sub move {
+ my ($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;
@@ -95,68 +143,80 @@ sub move {
while ($hash{'type_'.$rid} eq 'finish') {
$rid=$hash{'ids_'.$hash{'map_id_'.(split(/\./,$rid))[0]}};
}
- map {
- my $thiscond=
- &Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}});
- if ($thiscond>=$mincond) {
+ foreach my $id (split(/\,/,$hash{'to_'.$rid})) {
+ my $condition= $hash{'conditions_'.$hash{'goesto_'.$id}};
+ my $rescond = &Apache::lonnet::docondval($condition);
+ my $linkcond = &Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$id}});
+ my $thiscond = ($rescond<$linkcond)?$rescond:$linkcond;
+ if ($thiscond>=$mincond) {
if ($posnext) {
- $posnext.=','.$_.':'.$thiscond;
+ $posnext.=','.$id.':'.$thiscond;
} else {
- $posnext=$_.':'.$thiscond;
+ $posnext=$id.':'.$thiscond;
}
if ($thiscond>$mincond) { $mincond=$thiscond; }
}
- } split(/\,/,$hash{'to_'.$rid});
- map {
- my ($linkid,$condval)=split(/\:/,$_);
+ }
+ foreach my $id (split(/\,/,$posnext)) {
+ my ($linkid,$condval)=split(/\:/,$id);
if ($condval>=$mincond) {
$next=&addrid($next,$hash{'goesto_'.$linkid},
$hash{'condid_'.$hash{'undercond_'.$linkid}});
}
- } split(/\,/,$posnext);
+ }
if ($hash{'is_map_'.$next}) {
# This jumps to the beginning of a new map (going down level)
if (
$hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$next}}} eq 'sequence') {
$mapurl=$hash{'src_'.$next};
$next=$hash{'map_start_'.$hash{'src_'.$next}};
+ } elsif (
+# This jumps back up from an empty sequence, to a page up one level
+ $hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$next}}} eq 'page') {
+ $mapurl=$hash{'map_id_'.(split(/\./,$next))[0]};
}
} elsif
((split(/\./,$startoutrid))[0]!=(split(/\./,$next))[0]) {
# This comes up from a map (coming up one level);
$mapurl=$hash{'map_id_'.(split(/\./,$next))[0]};
- }
+ }
} elsif ($direction eq 'back') {
# ------------------------------------------------------------------- Backwards
while ($hash{'type_'.$rid} eq 'start') {
$rid=$hash{'ids_'.$hash{'map_id_'.(split(/\./,$rid))[0]}};
}
- map {
- my $thiscond=
- &Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}});
- if ($thiscond>=$mincond) {
- if ($posnext) {
- $posnext.=','.$_.':'.$thiscond;
- } else {
- $posnext=$_.':'.$thiscond;
- }
- if ($thiscond>$mincond) { $mincond=$thiscond; }
- }
- } split(/\,/,$hash{'from_'.$rid});
- map {
- my ($linkid,$condval)=split(/\:/,$_);
- if ($condval>=$mincond) {
- $next=&addrid($next,$hash{'comesfrom_'.$linkid},
- $hash{'condid_'.$hash{'undercond_'.$linkid}});
- }
- } split(/\,/,$posnext);
+ foreach my $id (split(/\,/,$hash{'from_'.$rid})) {
+ my $condition= $hash{'conditions_'.$hash{'comesfrom_'.$id}};
+ my $rescond = &Apache::lonnet::docondval($condition);
+ my $linkcond = &Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$id}});
+ my $thiscond = ($rescond<$linkcond)?$rescond:$linkcond;
+ if ($thiscond>=$mincond) {
+ if ($posnext) {
+ $posnext.=','.$id.':'.$thiscond;
+ } else {
+ $posnext=$id.':'.$thiscond;
+ }
+ if ($thiscond>$mincond) { $mincond=$thiscond; }
+ }
+ }
+ foreach my $id (split(/\,/,$posnext)) {
+ my ($linkid,$condval)=split(/\:/,$id);
+ if ($condval>=$mincond) {
+ $next=&addrid($next,$hash{'comesfrom_'.$linkid},
+ $hash{'condid_'.$hash{'undercond_'.$linkid}});
+ }
+ }
if ($hash{'is_map_'.$next}) {
# This jumps to the end of a new map (going down one level)
if (
$hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$next}}} eq 'sequence') {
$mapurl=$hash{'src_'.$next};
$next=$hash{'map_finish_'.$hash{'src_'.$next}};
- }
+ } elsif (
+ $hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$next}}} eq 'page') {
+# This jumps back up from an empty sequence, to a page up one level
+ $mapurl=$hash{'map_id_'.(split(/\./,$next))[0]};
+ }
} elsif
((split(/\./,$startoutrid))[0]!=(split(/\./,$next))[0]) {
# This comes back up from a map (going up one level);
@@ -166,6 +226,83 @@ sub move {
return ($next,$mapurl);
}
+sub first_accessible_resource {
+ my $furl;
+ if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'.db',
+ &GDBM_READER(),0640)) {
+ $furl=$hash{'first_url'};
+ my %args;
+ my ($url,$args) = split(/\?/,$furl);
+ foreach my $pair (split(/\&/,$args)) {
+ my ($name,$value) = split(/=/,$pair);
+ $args{&unescape($name)} = &unescape($value);
+ }
+ if (!&Apache::lonnet::allowed('bre',$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'},$hash{'first_mapurl'},'forward');
+# Build the new URL
+ my ($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 $furl;
+ } else {
+ return '/adm/navmaps';
+ }
+}
+
+sub check_http_req {
+ my ($srcref) = @_;
+ 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 (($$srcref =~ m{^\Q/public/$cdom/$cnum/syllabus\E($|\?)}) &&
+ ($ENV{'SERVER_PORT'} == 443) &&
+ ($env{'course.'.$env{'request.course.id'}.'.externalsyllabus'} =~ m{^http://})) {
+ unless (&Apache::lonnet::uses_sts()) {
+ $$srcref .= (($$srcref =~/\?/)? '&':'?') . 'usehttp=1';
+ $usehttp = 1;
+ }
+ } elsif (($$srcref =~ m{^\Q/adm/wrapper/ext/\E(?!https:)}) &&
+ ($ENV{'SERVER_PORT'} == 443)) {
+ unless (&Apache::lonnet::uses_sts()) {
+ my ($url,$anchor) = ($$srcref =~ /^([^\#]+)(?:|(\#[^\#]+))$/);
+ $$srcref = $url . (($$srcref =~/\?/)? '&':'?') . 'usehttp=1' .$anchor;
+ $usehttp = 1;
+ }
+ }
+ }
+ return $usehttp;
+}
+
+sub reinited_js {
+ my ($url,$cid,$timeout) = @_;
+ if (!$timeout) {
+ $timeout = 0;
+ }
+ return <<"END";
+
+END
+}
+
# ================================================================ Main Handler
sub handler {
@@ -174,70 +311,189 @@ sub handler {
# ------------------------------------------- Set document type for header only
if ($r->header_only) {
- $r->content_type('text/html');
- $r->send_http_header;
- return OK;
+ &Apache::loncommon::content_type($r,'text/html');
+ $r->send_http_header;
+ return OK;
}
my %cachehash=();
my $multichoice=0;
my %multichoicehash=();
- my $redirecturl='';
+ my %prog_state=();
+ my ($redirecturl,$redirectsymb,$enc,$anchor);
my $next='';
+ my $hostname = $r->hostname();
my @possibilities=();
- if (($ENV{'form.postdata'})&&($ENV{'request.course.fn'})) {
- $ENV{'form.postdata'}=~/(\w+)\:(.*)/;
- my $direction=$1;
- my $currenturl=$2;
+ &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['postdata']);
+ if (($env{'form.postdata'})&&($env{'request.course.fn'})) {
+ my ($direction,$currenturl) = ($env{'form.postdata'}=~/(\w+)\:(.*)/);
+ if ($currenturl=~m|^/enc/|) {
+ $currenturl=&Apache::lonenc::unencrypted($currenturl);
+ }
+ $currenturl=~s/\.\d+\.(\w+)$/\.$1/;
+ $currenturl=~s/^https?\:\/\///;
+ $currenturl=~s/^[^\/]+//;
+ my ($preupdatepos,$last,$reinitcheck);
if ($direction eq 'return') {
-# -------------------------------------------------------- Return to last known
- 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)) {
- $last=$hash{'last_known'};
- untie(%hash);
+ $last=$hash{'last_known'};
+ untie(%hash);
+ }
+ }
+ 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=&first_accessible_resource();
+ my $usehttp = &check_http_req(\$furl);
+ if (($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') {
+# -------------------------------------------------------- Return to last known
+ 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) {
+ $usehttp = &check_http_req(\$newloc);
+ if ($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';
}
- my $newloc;
- if ($last) {
- $newloc=&Apache::lonnet::clutter((split(/\_\_\_/,$last))[1]);
+ if (($usehttp) && ($hostname ne '')) {
+ $newloc='http://'.$hostname.$newloc;
} else {
- $newloc='/adm/noidea.html';
- }
- $r->content_type('text/html');
- $r->header_out(Location =>
- 'http://'.$ENV{'HTTP_HOST'}.$newloc);
-
- return REDIRECT;
+ $newloc=&Apache::lonnet::absolute_url().$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 => $newloc);
+ return REDIRECT;
+ }
}
- $currenturl=~s/^http\:\/\///;
- $currenturl=~s/^[^\/]+//;
- unless ($currenturl=~/^\/(res|adm\/wrapper|public|adm\/coursedocs)\//) {
- my $last;
- if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
- &GDBM_READER(),0640)) {
- $last=$hash{'last_known'};
+#
+# Is the current URL on the map? If not, start with last known URL
+#
+
+ unless (&Apache::lonnet::is_on_map($currenturl)) {
+ if ($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) {
- $currenturl=&Apache::lonnet::clutter((split(/\_\_\_/,$last))[1]);
+ $currenturl=&Apache::lonnet::clutter((&Apache::lonnet::decode_symb($last))[2]);
} else {
- $r->content_type('text/html');
- $r->header_out(Location =>
- 'http://'.$ENV{'HTTP_HOST'}.'/adm/noidea.html');
- return REDIRECT;
+ 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)=split(/\_\_\_/,$position);
- $cachehash{$startoutmap}{$thisurl}=$mapnum;
+ my ($startoutmap,$mapnum,$thisurl)=&Apache::lonnet::decode_symb($position);
+ $cachehash{$startoutmap}{$thisurl}=[$thisurl,$mapnum];
$cachehash{$startoutmap}{'last_known'}=
- &Apache::lonnet::declutter($currenturl);
+ [&Apache::lonnet::declutter($currenturl),$mapnum];
# ============================================================ Tie the big hash
- if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
+ if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'.db',
&GDBM_READER(),0640)) {
my $rid=$hash{'map_pc_'.&Apache::lonnet::clutter($startoutmap)}.
'.'.$mapnum;
@@ -246,45 +502,33 @@ 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_'.$next}) || ($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
- $redirecturl=$hash{'src_'.$next};
- $cachehash{$endupmap}
- {&Apache::lonnet::declutter($redirecturl)}
- =(split(/\./,$next))[1];
+ ($redirecturl,$redirectsymb,$enc,$anchor)=&hash_src($next);
+ $cachehash{$endupmap}{$redirecturl}=
+ [$redirecturl,(split(/\./,$next))[1]];
} else {
# ------------------------ There are multiple possibilities for a next resource
$multichoice=1;
- map {
- $multichoicehash{'src_'.$_}=$hash{'src_'.$_};
- $multichoicehash{'title_'.$_}=$hash{'title_'.$_};
- $multichoicehash{'type_'.$_}=$hash{'type_'.$_};
- (my $first, my $second) = $_ =~ /(\d+).(\d+)/;
- my $symbSrc = Apache::lonnet::declutter($hash{'src_'.$_});
- $multichoicehash{'symb_'.$_} =
+ foreach my $id (@possibilities) {
+ $multichoicehash{'src_'.$id}=$hash{'src_'.$id};
+ $multichoicehash{'title_'.$id}=$hash{'title_'.$id};
+ $multichoicehash{'type_'.$id}=$hash{'type_'.$id};
+ (my $first, my $second) = $id =~ /(\d+).(\d+)/;
+ my $symbSrc = Apache::lonnet::declutter($hash{'src_'.$id});
+ $multichoicehash{'symb_'.$id} =
Apache::lonnet::declutter($hash{'map_id_'.$first}.'___'.
$second.'___'.$symbSrc);
- my ($choicemap,$choiceres)=split(/\./,$_);
- $cachehash
- {&Apache::lonnet::declutter($hash{'src_'.$choicemap})}
- {&Apache::lonnet::declutter(
- $multichoicehash
- {'src_'.$_}
- )}
- =$choiceres;
- } @possibilities;
+ my ($choicemap,$choiceres)=split(/\./,$id);
+ my $map=&Apache::lonnet::declutter($hash{'src_'.$choicemap});
+ my $url=$multichoicehash{'src_'.$id};
+ $cachehash{$map}{$url}=[$url,$choiceres];
+ }
}
} else {
# -------------------------------------------------------------- No place to go
@@ -293,84 +537,160 @@ sub handler {
# ----------------- The program must come past this point to untie the big hash
untie(%hash);
# --------------------------------------------------------- Store position info
- $cachehash{$startoutmap}{'last_direction'}=$direction;
- foreach my $thismap (keys %cachehash) {
- &Apache::lonnet::symblist($thismap,%{$cachehash{$thismap}});
+ $cachehash{$startoutmap}{'last_direction'}=[$direction,'notasymb'];
+ foreach my $thismap (keys(%cachehash)) {
+ my $mapnum=$cachehash{$thismap}->{'mapnum'};
+ delete($cachehash{$thismap}->{'mapnum'});
+ &Apache::lonnet::symblist($thismap,
+ %{$cachehash{$thismap}});
}
# ============================================== Do not return before this line
if ($redirecturl) {
# ----------------------------------------------------- There is a URL to go to
-# ------------------------------------------------- Check for critical messages
- if ((time-$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\:/)) {
- $redirecturl='/adm/email?critical=display';
- }
- }
- &Apache::lonnet::appenv('user.criticalcheck.time'=>time);
+ if ($direction eq 'forward') {
+ &Apache::lonnet::linklog($currenturl,$redirecturl);
}
-
- $r->content_type('text/html');
- $r->header_out(Location =>
- 'http://'.$ENV{'HTTP_HOST'}.$redirecturl);
- return REDIRECT;
+ if ($direction eq 'back') {
+ &Apache::lonnet::linklog($redirecturl,$currenturl);
+ }
+# ------------------------------------- Check for and display critical messages
+ my ($redirect, $url) = &Apache::loncommon::critical_redirect(300,'flip');
+ unless ($redirect) {
+ my $usehttp = &check_http_req(\$redirecturl);
+ if (($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
- $r->content_type('text/html');
+ &Apache::loncommon::content_type($r,'text/html');
$r->send_http_header;
+ my %lt=&Apache::lonlocal::texthash('title' => 'End of Sequence',
+ 'explain' =>
+ 'You have reached the end of the sequence of materials.',
+ 'back' => 'Go Back',
+ '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',
+ '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');
$r->print(<Choose Next Location
-
-LON-CAPA
-There are several possibilities of where to go next.
+$start_page
+$lt{'wherenext'}
-Please click on the the resource you intend to access:
+$lt{'pick'}:
-
-Title | Type |
+
+$lt{'titleheader'} | $lt{'type'} |
ENDSTART
- foreach (@possibilities) {
+ foreach my $id (@possibilities) {
+ my $src = $multichoicehash{'src_'.$id};
+ my $usehttp = &check_http_req(\$src);
+ if (($usehttp) && ($hostname ne '')) {
+ $src = 'http://'.$hostname.$src;
+ }
$r->print(
''.
- $multichoicehash{'title_'.$_}.
- ' | '.$multichoicehash{'type_'.$_}.
+ &add_get_param($src,
+ {'symb' =>
+ $multichoicehash{'symb_'.$id},
+ }).'">'.
+ $multichoicehash{'title_'.$id}.
+ ' | '.$multichoicehash{'type_'.$id}.
' |
');
}
- $r->print('