--- rat/lonuserstate.pm 2005/03/15 17:21:42 1.85
+++ rat/lonuserstate.pm 2007/11/30 19:14:14 1.126
@@ -1,7 +1,7 @@
# The LearningOnline Network with CAPA
# Construct and maintain state and binary representation of course for user
#
-# $Id: lonuserstate.pm,v 1.85 2005/03/15 17:21:42 albertel Exp $
+# $Id: lonuserstate.pm,v 1.126 2007/11/30 19:14:14 albertel Exp $
#
# Copyright Michigan State University Board of Trustees
#
@@ -31,10 +31,9 @@ package Apache::lonuserstate;
# ------------------------------------------------- modules used by this module
use strict;
-use Apache::Constants qw(:common :http);
-use Apache::File;
use HTML::TokeParser;
-use Apache::lonnet();
+use Apache::lonnet;
+use Apache::lonlocal;
use Apache::loncommon();
use GDBM_File;
use Apache::lonmsg;
@@ -42,6 +41,9 @@ use Safe;
use Safe::Hole;
use Opcode;
use Apache::lonenc;
+use Fcntl qw(:flock);
+use LONCAPA;
+
# ---------------------------------------------------- Globals for this package
@@ -50,9 +52,11 @@ my %hash; # The big tied hash
my %parmhash;# The hash with the parameters
my @cond; # Array with all of the conditions
my $errtext; # variable with all errors
-my $retfurl; # variable with the very first URL in the course
+my $retfrid; # variable with the very first RID in the course
+my $retfurl; # first URL
my %randompick; # randomly picked resources
my %randompickseed; # optional seed for randomly picking resources
+my %randomorder; # maps to order contents randomly
my %encurl; # URLs in this folder are supposed to be encrypted
my %hiddenurl; # this URL (or complete folder) is supposed to be hidden
@@ -74,6 +78,7 @@ sub versiontrack {
sub putinversion {
my $uri=shift;
+ my $key=$env{'request.course.id'}.'_'.&Apache::lonnet::clutter($uri);
if ($hash{'version_'.$uri}) {
my $version=$hash{'version_'.$uri};
if ($version eq 'mostrecent') { return $uri; }
@@ -82,6 +87,7 @@ sub putinversion {
{ return $uri; }
$uri=~s/\.(\w+)$/\.$version\.$1/;
}
+ &Apache::lonnet::do_cache_new('courseresversion',$key,&Apache::lonnet::declutter($uri),600);
return $uri;
}
@@ -92,18 +98,22 @@ sub processversionfile {
my %versions=&Apache::lonnet::dump('resourceversions',
$cenv{'domain'},
$cenv{'num'});
- foreach (keys %versions) {
- if ($_=~/^error\:/) { return; }
- $hash{'version_'.$_}=$versions{$_};
+ foreach my $ver (keys(%versions)) {
+ if ($ver=~/^error\:/) { return; }
+ $hash{'version_'.$ver}=$versions{$ver};
}
}
# --------------------------------------------------------- Loads map from disk
sub loadmap {
- my $uri=shift;
- if ($hash{'map_pc_'.$uri}) { return OK; }
-
+ my ($uri,$parent_rid)=@_;
+ if ($hash{'map_pc_'.$uri}) {
+ $errtext.=''.
+ &mt('Multiple use of sequence/page [_1]! The course will not function properly.',''.$uri.'').
+ '
';
+ return;
+ }
$pc++;
my $lpc=$pc;
$hash{'map_pc_'.$uri}=$lpc;
@@ -116,195 +126,286 @@ sub loadmap {
unless (($fn=~/\.sequence$/) ||
($fn=~/\.page$/)) {
- $errtext.="Invalid map: $fn\n";
- return OK;
+ $errtext.=&mt("
Invalid map: [_1]",$fn);
+ return;
}
my $instr=&Apache::lonnet::getfile($fn);
- unless ($instr eq -1) {
+ if ($instr eq -1) {
+ $errtext.=&mt('
Map not loaded: The file [_1] does not exist.',$fn);
+ return;
+ }
# Successfully got file, parse it
- my $parser = HTML::TokeParser->new(\$instr);
- my $token;
-
- my $linkpc=0;
+ my $parser = HTML::TokeParser->new(\$instr);
+ $parser->attr_encoded(1);
+ # first get all parameters
+ while (my $token = $parser->get_token) {
+ next if ($token->[0] ne 'S');
+ if ($token->[1] eq 'param') {
+ &parse_param($token,$lpc);
+ }
+ }
+ #reset parser
+ $parser = HTML::TokeParser->new(\$instr);
+ $parser->attr_encoded(1);
+
+ my $linkpc=0;
+
+ $fn=~/\.(\w+)$/;
+
+ $hash{'map_type_'.$lpc}=$1;
+
+ my $randomize = ($randomorder{$parent_rid} =~ /^yes$/i);
+
+ my @map_ids;
+ while (my $token = $parser->get_token) {
+ next if ($token->[0] ne 'S');
+ if ($token->[1] eq 'resource') {
+ push(@map_ids,&parse_resource($token,$lpc,$ispage,$uri));
+ } elsif ($token->[1] eq 'link' && !$randomize) {
+# ----------------------------------------------------------------------- Links
+ &make_link(++$linkpc,$lpc,$token->[2]->{'to'},
+ $token->[2]->{'from'},
+ $token->[2]->{'condition'});
+ } elsif ($token->[1] eq 'condition' && !$randomize) {
+ &parse_condition($token,$lpc);
+ }
+ }
- $fn=~/\.(\w+)$/;
+ if ($randomize) {
+ if (!$env{'request.role.adv'}) {
+ my $seed;
+ if (defined($randompickseed{$parent_rid})) {
+ $seed = $randompickseed{$parent_rid};
+ } else {
+ my ($mapid,$resid)=split(/\./,$parent_rid);
+ my $symb=
+ &Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},
+ $resid,$hash{'src_'.$parent_rid});
+
+ $seed = $symb;
+ }
+
+ my $rndseed=&Apache::lonnet::rndseed($seed);
+ &Apache::lonnet::setup_random_from_rndseed($rndseed);
+ @map_ids=&Math::Random::random_permutation(@map_ids);
+ }
+ my $from = shift(@map_ids);
+ my $from_rid = $lpc.'.'.$from;
+ $hash{'map_start_'.$uri} = $from_rid;
+ $hash{'type_'.$from_rid}='start';
+
+ while (my $to = shift(@map_ids)) {
+ &make_link(++$linkpc,$lpc,$to,$from);
+ my $to_rid = $lpc.'.'.$to;
+ $hash{'type_'.$to_rid}='normal';
+ $from = $to;
+ $from_rid = $to_rid;
+ }
+
+ $hash{'map_finish_'.$uri}= $from_rid;
+ $hash{'type_'.$from_rid}='finish';
+ }
+
+ my $parser = HTML::TokeParser->new(\$instr);
+ $parser->attr_encoded(1);
+ # last parse out the mapalias params so as to ignore anything
+ # refering to non-existant resources
+ while (my $token = $parser->get_token) {
+ next if ($token->[0] ne 'S');
+ if ($token->[1] eq 'param') {
+ &parse_mapalias_param($token,$lpc);
+ }
+ }
+}
- $hash{'map_type_'.$lpc}=$1;
- while ($token = $parser->get_token) {
- if ($token->[0] eq 'S') {
- if ($token->[1] eq 'resource') {
# -------------------------------------------------------------------- Resource
-
- my $rid=$lpc.'.'.$token->[2]->{'id'};
-
- $hash{'kind_'.$rid}='res';
- $hash{'title_'.$rid}=$token->[2]->{'title'};
- my $turi=&versiontrack($token->[2]->{'src'});
- if ($token->[2]->{'version'}) {
- unless ($hash{'version_'.$turi}) {
- $hash{'version_'.$turi}=$1;
- }
- }
- my $title=$token->[2]->{'title'};
- $title=~s/\&colon\;/\:/gs;
-# my $symb=&Apache::lonnet::encode_symb($uri,
-# $token->[2]->{'id'},
-# $turi);
-# &Apache::lonnet::do_cache_new('title',$symb,$title);
- unless ($ispage) {
- $turi=~/\.(\w+)$/;
- my $embstyle=&Apache::loncommon::fileembstyle($1);
- if ($token->[2]->{'external'} eq 'true') { # external
- $turi=~s/^http\:\/\//\/adm\/wrapper\/ext\//;
- } elsif ($turi=~/^\/*uploaded\//) { # uploaded
- if (($embstyle eq 'img') || ($embstyle eq 'emb')) {
- $turi='/adm/wrapper'.$turi;
- } elsif ($embstyle eq 'ssi') {
- #do nothing with these
- } elsif ($turi!~/\.(sequence|page)$/) {
- $turi='/adm/coursedocs/showdoc'.$turi;
- }
- } elsif ($turi=~/\S/) { # normal non-empty internal resource
- my $mapdir=$uri;
- $mapdir=~s/[^\/]+$//;
- $turi=&Apache::lonnet::hreflocation($mapdir,$turi);
- if (($embstyle eq 'img') || ($embstyle eq 'emb')) {
- $turi='/adm/wrapper'.$turi;
- }
- }
- }
+sub parse_resource {
+ my ($token,$lpc,$ispage,$uri) = @_;
+ if ($token->[2]->{'type'} eq 'zombie') { next; }
+ my $rid=$lpc.'.'.$token->[2]->{'id'};
+
+ $hash{'kind_'.$rid}='res';
+ $hash{'title_'.$rid}=$token->[2]->{'title'};
+ my $turi=&versiontrack($token->[2]->{'src'});
+ if ($token->[2]->{'version'}) {
+ unless ($hash{'version_'.$turi}) {
+ $hash{'version_'.$turi}=$1;
+ }
+ }
+ my $title=$token->[2]->{'title'};
+ $title=~s/\&colon\;/\:/gs;
+# my $symb=&Apache::lonnet::encode_symb($uri,
+# $token->[2]->{'id'},
+# $turi);
+# &Apache::lonnet::do_cache_new('title',$symb,$title);
+ unless ($ispage) {
+ $turi=~/\.(\w+)$/;
+ my $embstyle=&Apache::loncommon::fileembstyle($1);
+ if ($token->[2]->{'external'} eq 'true') { # external
+ $turi=~s/^http\:\/\//\/adm\/wrapper\/ext\//;
+ } elsif ($turi=~/^\/*uploaded\//) { # uploaded
+ if (($embstyle eq 'img')
+ || ($embstyle eq 'emb')
+ || ($embstyle eq 'wrp')) {
+ $turi='/adm/wrapper'.$turi;
+ } elsif ($embstyle eq 'ssi') {
+ #do nothing with these
+ } elsif ($turi!~/\.(sequence|page)$/) {
+ $turi='/adm/coursedocs/showdoc'.$turi;
+ }
+ } elsif ($turi=~/\S/) { # normal non-empty internal resource
+ my $mapdir=$uri;
+ $mapdir=~s/[^\/]+$//;
+ $turi=&Apache::lonnet::hreflocation($mapdir,$turi);
+ if (($embstyle eq 'img')
+ || ($embstyle eq 'emb')
+ || ($embstyle eq 'wrp')) {
+ $turi='/adm/wrapper'.$turi;
+ }
+ }
+ }
# Store reverse lookup, remove query string
- my $idsuri=$turi;
- $idsuri=~s/\?.+$//;
- if (defined($hash{'ids_'.$idsuri})) {
- $hash{'ids_'.$idsuri}.=','.$rid;
- } else {
- $hash{'ids_'.$idsuri}=''.$rid;
- }
-
- if ($turi=~/\/(syllabus|aboutme|navmaps|smppg|bulletinboard)$/) {
- $turi.='?register=1';
- }
-
- $hash{'src_'.$rid}=$turi;
-
- if ($token->[2]->{'external'} eq 'true') {
- $hash{'ext_'.$rid}='true:';
- } else {
- $hash{'ext_'.$rid}='false:';
- }
- if ($token->[2]->{'type'}) {
- $hash{'type_'.$rid}=$token->[2]->{'type'};
- if ($token->[2]->{'type'} eq 'start') {
- $hash{'map_start_'.$uri}="$rid";
- }
- if ($token->[2]->{'type'} eq 'finish') {
- $hash{'map_finish_'.$uri}="$rid";
- }
- } else {
- $hash{'type_'.$rid}='normal';
- }
-
- if (($turi=~/\.sequence$/) ||
- ($turi=~/\.page$/)) {
- $hash{'is_map_'.$rid}=1;
- &loadmap($turi);
- }
-
- } elsif ($token->[1] eq 'condition') {
-# ------------------------------------------------------------------- Condition
-
- my $rid=$lpc.'.'.$token->[2]->{'id'};
+ my $idsuri=$turi;
+ $idsuri=~s/\?.+$//;
+ if (defined($hash{'ids_'.$idsuri})) {
+ $hash{'ids_'.$idsuri}.=','.$rid;
+ } else {
+ $hash{'ids_'.$idsuri}=''.$rid;
+ }
+
+ if ($turi=~/\/(syllabus|aboutme|navmaps|smppg|bulletinboard)$/) {
+ $turi.='?register=1';
+ }
+
+ $hash{'src_'.$rid}=$turi;
+
+ if ($token->[2]->{'external'} eq 'true') {
+ $hash{'ext_'.$rid}='true:';
+ } else {
+ $hash{'ext_'.$rid}='false:';
+ }
+ if ($token->[2]->{'type'}) {
+ $hash{'type_'.$rid}=$token->[2]->{'type'};
+ if ($token->[2]->{'type'} eq 'start') {
+ $hash{'map_start_'.$uri}="$rid";
+ }
+ if ($token->[2]->{'type'} eq 'finish') {
+ $hash{'map_finish_'.$uri}="$rid";
+ }
+ } else {
+ $hash{'type_'.$rid}='normal';
+ }
+
+ if (($turi=~/\.sequence$/) ||
+ ($turi=~/\.page$/)) {
+ $hash{'is_map_'.$rid}=1;
+ &loadmap($turi,$rid);
+ }
+ return $token->[2]->{'id'};
+}
- $hash{'kind_'.$rid}='cond';
- $cond[$#cond+1]=$token->[2]->{'value'};
- $hash{'condid_'.$rid}=$#cond;
- if ($token->[2]->{'type'}) {
- $cond[$#cond].=':'.$token->[2]->{'type'};
- } else {
- $cond[$#cond].=':normal';
- }
+sub make_link {
+ my ($linkpc,$lpc,$to,$from,$condition) = @_;
+
+ my $linkid=$lpc.'.'.$linkpc;
+ my $goesto=$lpc.'.'.$to;
+ my $comesfrom=$lpc.'.'.$from;
+ my $undercond=0;
+
+ if ($condition) {
+ $undercond=$lpc.'.'.$condition;
+ }
+
+ $hash{'goesto_'.$linkid}=$goesto;
+ $hash{'comesfrom_'.$linkid}=$comesfrom;
+ $hash{'undercond_'.$linkid}=$undercond;
- } elsif ($token->[1] eq 'link') {
-# ----------------------------------------------------------------------- Links
+ if (defined($hash{'to_'.$comesfrom})) {
+ $hash{'to_'.$comesfrom}.=','.$linkid;
+ } else {
+ $hash{'to_'.$comesfrom}=''.$linkid;
+ }
+ if (defined($hash{'from_'.$goesto})) {
+ $hash{'from_'.$goesto}.=','.$linkid;
+ } else {
+ $hash{'from_'.$goesto}=''.$linkid;
+ }
+}
- $linkpc++;
- my $linkid=$lpc.'.'.$linkpc;
+# ------------------------------------------------------------------- Condition
+sub parse_condition {
+ my ($token,$lpc) = @_;
+ my $rid=$lpc.'.'.$token->[2]->{'id'};
+
+ $hash{'kind_'.$rid}='cond';
+
+ my $condition = $token->[2]->{'value'};
+ $condition =~ s/[\n\r]+/ /gs;
+ push(@cond, $condition);
+ $hash{'condid_'.$rid}=$#cond;
+ if ($token->[2]->{'type'}) {
+ $cond[$#cond].=':'.$token->[2]->{'type'};
+ } else {
+ $cond[$#cond].=':normal';
+ }
+}
- my $goesto=$lpc.'.'.$token->[2]->{'to'};
- my $comesfrom=$lpc.'.'.$token->[2]->{'from'};
- my $undercond=0;
-
- if ($token->[2]->{'condition'}) {
- $undercond=$lpc.'.'.$token->[2]->{'condition'};
- }
-
- $hash{'goesto_'.$linkid}=$goesto;
- $hash{'comesfrom_'.$linkid}=$comesfrom;
- $hash{'undercond_'.$linkid}=$undercond;
-
- if (defined($hash{'to_'.$comesfrom})) {
- $hash{'to_'.$comesfrom}.=','.$linkid;
- } else {
- $hash{'to_'.$comesfrom}=''.$linkid;
- }
- if (defined($hash{'from_'.$goesto})) {
- $hash{'from_'.$goesto}.=','.$linkid;
- } else {
- $hash{'from_'.$goesto}=''.$linkid;
- }
- } elsif ($token->[1] eq 'param') {
# ------------------------------------------------------------------- Parameter
- my $referid=$lpc.'.'.$token->[2]->{'to'};
- my $name=$token->[2]->{'name'};
- my $part;
- if ($name=~/^parameter_(.*)_/) {
- $part=$1;
- } else {
- $part=0;
- }
- $name=~s/^.*_([^_]*)$/$1/;
- my $newparam=
- &Apache::lonnet::escape($token->[2]->{'type'}).':'.
- &Apache::lonnet::escape($part.'.'.$name).'='.
- &Apache::lonnet::escape($token->[2]->{'value'});
- if (defined($hash{'param_'.$referid})) {
- $hash{'param_'.$referid}.='&'.$newparam;
- } else {
- $hash{'param_'.$referid}=''.$newparam;
- }
- if ($token->[2]->{'name'}=~/^parameter_(0_)*mapalias$/) {
- $hash{'mapalias_'.$token->[2]->{'value'}}=$referid;
- }
- if ($token->[2]->{'name'}=~/^parameter_(0_)*randompick$/) {
- $randompick{$referid}=$token->[2]->{'value'};
- }
- if ($token->[2]->{'name'}=~/^parameter_(0_)*randompickseed$/) {
- $randompick{$referid}=$token->[2]->{'value'};
- }
- if ($token->[2]->{'name'}=~/^parameter_(0_)*encrypturl$/) {
- if ($token->[2]->{'value'}=~/^yes$/i) {
- $encurl{$referid}=1;
- }
- }
- if ($token->[2]->{'name'}=~/^parameter_(0_)*hiddenresource$/) {
- if ($token->[2]->{'value'}=~/^yes$/i) {
- $hiddenurl{$referid}=1;
- }
- }
- }
-
- }
- }
-
+sub parse_param {
+ my ($token,$lpc) = @_;
+ my $referid=$lpc.'.'.$token->[2]->{'to'};
+ my $name=$token->[2]->{'name'};
+ my $part;
+ if ($name=~/^parameter_(.*)_/) {
+ $part=$1;
} else {
- $errtext.='Map not loaded: The file ('.$fn.') does not exist. ';
+ $part=0;
+ }
+ $name=~s/^.*_([^_]*)$/$1/;
+ my $newparam=
+ &escape($token->[2]->{'type'}).':'.
+ &escape($part.'.'.$name).'='.
+ &escape($token->[2]->{'value'});
+ if (defined($hash{'param_'.$referid})) {
+ $hash{'param_'.$referid}.='&'.$newparam;
+ } else {
+ $hash{'param_'.$referid}=''.$newparam;
+ }
+ if ($token->[2]->{'name'}=~/^parameter_(0_)*randompick$/) {
+ $randompick{$referid}=$token->[2]->{'value'};
+ }
+ if ($token->[2]->{'name'}=~/^parameter_(0_)*randompickseed$/) {
+ $randompickseed{$referid}=$token->[2]->{'value'};
+ }
+ if ($token->[2]->{'name'}=~/^parameter_(0_)*randomorder$/) {
+ $randomorder{$referid}=$token->[2]->{'value'};
+ }
+ if ($token->[2]->{'name'}=~/^parameter_(0_)*encrypturl$/) {
+ if ($token->[2]->{'value'}=~/^yes$/i) {
+ $encurl{$referid}=1;
+ }
+ }
+ if ($token->[2]->{'name'}=~/^parameter_(0_)*hiddenresource$/) {
+ if ($token->[2]->{'value'}=~/^yes$/i) {
+ $hiddenurl{$referid}=1;
+ }
+ }
+}
+
+sub parse_mapalias_param {
+ my ($token,$lpc) = @_;
+ my $referid=$lpc.'.'.$token->[2]->{'to'};
+ return if (!exists($hash{'src_'.$referid}));
+
+ if ($token->[2]->{'name'}=~/^parameter_(0_)*mapalias$/) {
+ &count_mapalias($token->[2]->{'value'},$referid);
+ $hash{'mapalias_'.$token->[2]->{'value'}}=$referid;
}
}
@@ -312,20 +413,22 @@ sub loadmap {
sub simplify {
my $expression=shift;
+# (0&1) = 1
+ $expression=~s/\(0\&([_\.\d]+)\)/$1/g;
# (8)=8
- $expression=~s/\((\d+)\)/$1/g;
+ $expression=~s/\(([_\.\d]+)\)/$1/g;
# 8&8=8
- $expression=~s/(\D)(\d+)\&\2(\D)/$1$2$3/g;
+ $expression=~s/([^_\.\d])([_\.\d]+)\&\2([^_\.\d])/$1$2$3/g;
# 8|8=8
- $expression=~s/(\D)(\d+)\|\2(\D)/$1$2$3/g;
+ $expression=~s/([^_\.\d])([_\.\d]+)\|\2([^_\.\d])/$1$2$3/g;
# (5&3)&4=5&3&4
- $expression=~s/\((\d+)((?:\&\d+)+)\)\&(\d+\D)/$1$2\&$3/g;
+ $expression=~s/\(([_\.\d]+)((?:\&[_\.\d]+)+)\)\&([_\.\d]+[^_\.\d])/$1$2\&$3/g;
# (((5&3)|(4&6)))=((5&3)|(4&6))
$expression=~
- s/\((\(\(\d+(?:\&\d+)*\)(?:\|\(\d+(?:\&\d+)*\))+\))\)/$1/g;
+ s/\((\(\([_\.\d]+(?:\&[_\.\d]+)*\)(?:\|\([_\.\d]+(?:\&[_\.\d]+)*\))+\))\)/$1/g;
# ((5&3)|(4&6))|(1&2)=(5&3)|(4&6)|(1&2)
$expression=~
- s/\((\(\d+(?:\&\d+)*\))((?:\|\(\d+(?:\&\d+)*\))+)\)\|(\(\d+(?:\&\d+)*\))/\($1$2\|$3\)/g;
+ s/\((\([_\.\d]+(?:\&[_\.\d]+)*\))((?:\|\([_\.\d]+(?:\&[_\.\d]+)*\))+)\)\|(\([_\.\d]+(?:\&[_\.\d]+)*\))/\($1$2\|$3\)/g;
return $expression;
}
@@ -334,18 +437,24 @@ sub simplify {
sub traceroute {
my ($sofar,$rid,$beenhere,$encflag,$hdnflag)=@_;
my $newsofar=$sofar=simplify($sofar);
- unless ($beenhere=~/\&$rid\&/) {
+ unless ($beenhere=~/\&\Q$rid\E\&/) {
$beenhere.=$rid.'&';
my ($mapid,$resid)=split(/\./,$rid);
my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,$hash{'src_'.$rid});
my $hidden=&Apache::lonnet::EXT('resource.0.hiddenresource',$symb);
- if ($hdnflag || lc($hidden) eq 'yes') { $hiddenurl{$rid}=1; }
+
+ if ($hdnflag || lc($hidden) eq 'yes') {
+ $hiddenurl{$rid}=1;
+ }
+ if (!$hdnflag && lc($hidden) eq 'no') {
+ delete($hiddenurl{$rid});
+ }
+
my $encrypt=&Apache::lonnet::EXT('resource.0.encrypturl',$symb);
if ($encflag || lc($encrypt) eq 'yes') { $encurl{$rid}=1; }
- if (($retfurl eq '') && ($hash{'src_'.$rid})
+ if (($retfrid eq '') && ($hash{'src_'.$rid})
&& ($hash{'src_'.$rid}!~/\.sequence$/)) {
- $retfurl=$hash{'src_'.$rid}.(($hash{'src_'.$rid}=~/\?/)?'&':'?').
- 'symb='.$symb;
+ $retfrid=$rid;
}
if (defined($hash{'conditions_'.$rid})) {
$hash{'conditions_'.$rid}=simplify(
@@ -353,29 +462,33 @@ sub traceroute {
} else {
$hash{'conditions_'.$rid}=$sofar;
}
- $newsofar=$hash{'conditions_'.$rid};
+
+ # if the expression is just the 0th condition keep it
+ # otherwise leave a pointer to this condition expression
+ $newsofar = ($sofar eq '0') ? $sofar : '_'.$rid;
+
if (defined($hash{'is_map_'.$rid})) {
if (defined($hash{'map_start_'.$hash{'src_'.$rid}})) {
$sofar=$newsofar=
&traceroute($sofar,
- $hash{'map_start_'.$hash{'src_'.$rid}},'&',
+ $hash{'map_start_'.$hash{'src_'.$rid}},
+ $beenhere,
$encflag || $encurl{$rid},
$hdnflag || $hiddenurl{$rid});
}
}
if (defined($hash{'to_'.$rid})) {
- foreach (split(/\,/,$hash{'to_'.$rid})) {
+ foreach my $id (split(/\,/,$hash{'to_'.$rid})) {
my $further=$sofar;
- if ($hash{'undercond_'.$_}) {
- if (defined($hash{'condid_'.$hash{'undercond_'.$_}})) {
- $further=simplify('('.$further.')&('.
- $hash{'condid_'.$hash{'undercond_'.$_}}.')');
+ if ($hash{'undercond_'.$id}) {
+ if (defined($hash{'condid_'.$hash{'undercond_'.$id}})) {
+ $further=simplify('('.'_'.$rid.')&('.
+ $hash{'condid_'.$hash{'undercond_'.$id}}.')');
} else {
- $errtext.='Undefined condition ID: '
- .$hash{'undercond_'.$_}.'. ';
+ $errtext.=&mt('
Undefined condition ID: [_1]',$hash{'undercond_'.$id});
}
}
- $newsofar=&traceroute($further,$hash{'goesto_'.$_},$beenhere,
+ $newsofar=&traceroute($further,$hash{'goesto_'.$id},$beenhere,
$encflag,$hdnflag);
}
}
@@ -391,51 +504,47 @@ sub accinit {
my %captured=();
my $condcounter=0;
$acchash{'acc.cond.'.$short.'.0'}=0;
- foreach (keys %hash) {
- if ($_=~/^conditions/) {
- my $expr=$hash{$_};
- foreach ($expr=~m/(\(\(\d+(?:\&\d+)+\)(?:\|\(\d+(?:\&\d+)+\))+\))/g) {
- my $sub=$_;
- my $orig=$_;
- $sub=~/\(\((\d+\&(:?\d+\&)*)(?:\d+\&*)+\)(?:\|\(\1(?:\d+\&*)+\))+\)/;
- my $factor=$1;
- $sub=~s/$factor//g;
+ foreach my $key (keys(%hash)) {
+ if ($key=~/^conditions/) {
+ my $expr=$hash{$key};
+ # try to find and factor out common sub-expressions
+ foreach my $sub ($expr=~m/(\(\([_\.\d]+(?:\&[_\.\d]+)+\)(?:\|\([_\.\d]+(?:\&[_\.\d]+)+\))+\))/g) {
+ my $orig=$sub;
+
+ my ($factor) = ($sub=~/\(\(([_\.\d]+\&(:?[_\.\d]+\&)*)(?:[_\.\d]+\&*)+\)(?:\|\(\1(?:[_\.\d]+\&*)+\))+\)/);
+ next if (!defined($factor));
+
+ $sub=~s/\Q$factor\E//g;
$sub=~s/^\(/\($factor\(/;
$sub.=')';
$sub=simplify($sub);
- $orig=~s/(\W)/\\$1/g;
- $expr=~s/$orig/$sub/;
+ $expr=~s/\Q$orig\E/$sub/;
}
- $hash{$_}=$expr;
+ $hash{$key}=$expr;
unless (defined($captured{$expr})) {
$condcounter++;
$captured{$expr}=$condcounter;
$acchash{'acc.cond.'.$short.'.'.$condcounter}=$expr;
}
- } elsif ($_=~/^param_(\d+)\.(\d+)/) {
- my $prefix=&Apache::lonnet::declutter($hash{'map_id_'.$1}).
- '___'.$2.'___'.&Apache::lonnet::declutter($hash{'src_'.$1.'.'.$2});
- foreach (split(/\&/,$hash{$_})) {
- my ($typename,$value)=split(/\=/,$_);
+ } elsif ($key=~/^param_(\d+)\.(\d+)/) {
+ my $prefix=&Apache::lonnet::encode_symb($hash{'map_id_'.$1},$2,
+ $hash{'src_'.$1.'.'.$2});
+ foreach my $param (split(/\&/,$hash{$key})) {
+ my ($typename,$value)=split(/\=/,$param);
my ($type,$name)=split(/\:/,$typename);
- $parmhash{$prefix.'.'.&Apache::lonnet::unescape($name)}=
- &Apache::lonnet::unescape($value);
- $parmhash{$prefix.'.'.&Apache::lonnet::unescape($name).'.type'}=
- &Apache::lonnet::unescape($type);
+ $parmhash{$prefix.'.'.&unescape($name)}=
+ &unescape($value);
+ $parmhash{$prefix.'.'.&unescape($name).'.type'}=
+ &unescape($type);
}
}
}
- foreach (keys %hash) {
- if ($_=~/^ids/) {
- foreach (split(/\,/,$hash{$_})) {
- my $resid=$_;
+ foreach my $key (keys(%hash)) {
+ if ($key=~/^ids/) {
+ foreach my $resid (split(/\,/,$hash{$key})) {
my $uri=$hash{'src_'.$resid};
- $uri=~s/^\/adm\/wrapper//;
- $uri=&Apache::lonnet::declutter($uri);
- my @uriparts=split(/\//,$uri);
- my $urifile=$uriparts[$#uriparts];
- $#uriparts--;
- my $uripath=join('/',@uriparts);
+ my ($uripath,$urifile) =
+ &Apache::lonnet::split_uri_for_cond($uri);
if ($uripath) {
my $uricond='0';
if (defined($hash{'conditions_'.$resid})) {
@@ -447,8 +556,8 @@ sub accinit {
my $replace=$1;
my $regexp=$replace;
#$regexp=~s/\|/\\\|/g;
- $acchash{'acc.res.'.$short.'.'.$uripath}
- =~s/\Q$regexp\E/$replace\|$uricond/;
+ $acchash{'acc.res.'.$short.'.'.$uripath} =~
+ s/\Q$regexp\E/$replace\|$uricond/;
} else {
$acchash{'acc.res.'.$short.'.'.$uripath}.=
$urifile.':'.$uricond.'&';
@@ -477,8 +586,8 @@ sub hiddenurls {
my $mpc=$hash{'map_pc_'.$hash{'src_'.$rid}};
# ------------------------------------------- put existing resources into array
my @currentrids=();
- foreach (sort(keys(%hash))) {
- if ($_=~/^src_($mpc\.\d+)/) {
+ foreach my $key (sort(keys(%hash))) {
+ if ($key=~/^src_($mpc\.\d+)/) {
if ($hash{'src_'.$1}) { push @currentrids, $1; }
}
}
@@ -504,11 +613,10 @@ sub hiddenurls {
$hash{'randomout_'.$currentrids[$k]}=1;
my ($mapid,$resid)=split(/\./,$currentrids[$k]);
$randomoutentry.='&'.
- &Apache::lonnet::symbclean(
- &Apache::lonnet::declutter($hash{'map_id_'.$mapid}).
- '___'.$resid.'___'.
- &Apache::lonnet::declutter($hash{'src_'.$currentrids[$k]})
- ).'&';
+ &Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},
+ $resid,
+ $hash{'src_'.$currentrids[$k]}
+ ).'&';
}
}
}
@@ -517,11 +625,8 @@ sub hiddenurls {
$hash{'randomout_'.$rid}=1;
my ($mapid,$resid)=split(/\./,$rid);
$randomoutentry.='&'.
- &Apache::lonnet::symbclean(
- &Apache::lonnet::declutter($hash{'map_id_'.$mapid}).
- '___'.$resid.'___'.
- &Apache::lonnet::declutter($hash{'src_'.$rid})
- ).'&';
+ &Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,
+ $hash{'src_'.$rid}).'&';
}
# --------------------------------------- append randomout entry to environment
if ($randomoutentry) {
@@ -534,58 +639,80 @@ sub hiddenurls {
sub readmap {
my $short=shift;
$short=~s/^\///;
- my %cenv=&Apache::lonnet::coursedescription($short);
+ my %cenv=&Apache::lonnet::coursedescription($short,{'freshen_cache'=>1});
my $fn=$cenv{'fn'};
my $uri;
$short=~s/\//\_/g;
unless ($uri=$cenv{'url'}) {
&Apache::lonnet::logthis("WARNING: ".
"Could not load course $short.");
- return 'No course data available.';
+ return ('',&mt('No course data available.'));;
}
@cond=('true:normal');
- unlink($fn.'.db');
- unlink($fn.'_symb.db');
- unlink($fn.'.state');
- unlink($fn.'parms.db');
+
+ open(LOCKFILE,">$fn.db.lock");
+ my $lock=0;
+ if (flock(LOCKFILE,LOCK_EX|LOCK_NB)) {
+ $lock=1;
+ unlink($fn.'.db');
+ unlink($fn.'_symb.db');
+ unlink($fn.'.state');
+ unlink($fn.'parms.db');
+ }
undef %randompick;
undef %hiddenurl;
undef %encurl;
- $retfurl='';
- if ((tie(%hash,'GDBM_File',"$fn.db",&GDBM_WRCREAT(),0640)) &&
+ $retfrid='';
+ if ($lock && (tie(%hash,'GDBM_File',"$fn.db",&GDBM_WRCREAT(),0640)) &&
(tie(%parmhash,'GDBM_File',$fn.'_parms.db',&GDBM_WRCREAT(),0640))) {
%hash=();
%parmhash=();
$errtext='';
$pc=0;
+ &clear_mapalias_count();
&processversionfile(%cenv);
my $furi=&Apache::lonnet::clutter($uri);
$hash{'src_0.0'}=&versiontrack($furi);
$hash{'title_0.0'}=&Apache::lonnet::metadata($uri,'title');
$hash{'ids_'.$furi}='0.0';
$hash{'is_map_0.0'}=1;
- loadmap($uri);
+ loadmap($uri,'0.0');
if (defined($hash{'map_start_'.$uri})) {
&Apache::lonnet::appenv("request.course.id" => $short,
"request.course.fn" => $fn,
"request.course.uri" => $uri);
+ $env{'request.course.id'}=$short;
&traceroute('0',$hash{'map_start_'.$uri},'&');
&accinit($uri,$short,$fn);
&hiddenurls();
}
+ $errtext .= &get_mapalias_errors();
# ------------------------------------------------------- Put versions into src
- foreach (keys %hash) {
- if ($_=~/^src\_/) {
- $hash{$_}=&putinversion($hash{$_});
+ foreach my $key (keys(%hash)) {
+ if ($key=~/^src_/) {
+ $hash{$key}=&putinversion($hash{$key});
+ } elsif ($key =~ /^(map_(?:start|finish|pc)_)(.*)/) {
+ my ($type, $url) = ($1,$2);
+ my $value = $hash{$key};
+ $hash{$type.&putinversion($url)}=$value;
}
}
# ---------------------------------------------------------------- Encrypt URLs
- foreach (keys %encurl) {
-# $hash{'src_'.$_}=&Apache::lonenc::encrypted($hash{'src_'.$_});
- $hash{'encrypted_'.$_}=1;
+ foreach my $id (keys(%encurl)) {
+# $hash{'src_'.$id}=&Apache::lonenc::encrypted($hash{'src_'.$id});
+ $hash{'encrypted_'.$id}=1;
}
# ----------------------------------------------- Close hashes to finally store
# --------------------------------- Routine must pass this point, no early outs
+ $hash{'first_rid'}=$retfrid;
+ my ($mapid,$resid)=split(/\./,$retfrid);
+ $hash{'first_mapurl'}=$hash{'map_id_'.$mapid};
+ my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,$hash{'src_'.$retfrid});
+ $retfurl=&add_get_param($hash{'src_'.$retfrid},{ 'symb' => $symb });
+ if ($hash{'encrypted_'.$retfrid}) {
+ $retfurl=&Apache::lonenc::encrypted($retfurl,(&Apache::lonnet::allowed('adv') ne 'F'));
+ }
+ $hash{'first_url'}=$retfurl;
unless ((untie(%hash)) && (untie(%parmhash))) {
&Apache::lonnet::logthis("WARNING: ".
"Could not untie coursemap $fn for $uri.");
@@ -593,22 +720,56 @@ sub readmap {
# ---------------------------------------------------- Store away initial state
{
my $cfh;
- if ($cfh=Apache::File->new(">$fn.state")) {
+ if (open($cfh,">$fn.state")) {
print $cfh join("\n",@cond);
} else {
&Apache::lonnet::logthis("WARNING: ".
"Could not write statemap $fn for $uri.");
}
- }
+ }
+ flock(LOCKFILE,LOCK_UN);
+ close(LOCKFILE);
} else {
+ # if we are here it is likely because we are already trying to
+ # initialize the course in another child, busy wait trying to
+ # tie the hashes for the next 90 seconds, if we succeed forward
+ # them on to navmaps, if we fail, throw up the Could not init
+ # course screen
+ if ($lock) {
+ # Got the lock but not the DB files
+ flock(LOCKFILE,LOCK_UN);
+ }
+ untie(%hash);
+ untie(%parmhash);
&Apache::lonnet::logthis("WARNING: ".
"Could not tie coursemap $fn for $uri.");
+ my $i=0;
+ while($i<90) {
+ $i++;
+ sleep(1);
+ if (flock(LOCKFILE,LOCK_EX|LOCK_NB) &&
+ (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER(),0640))) {
+ if (tie(%parmhash,'GDBM_File',$fn.'_parms.db',&GDBM_READER(),0640)) {
+ $retfurl='/adm/navmaps';
+ &Apache::lonnet::appenv("request.course.id" => $short,
+ "request.course.fn" => $fn,
+ "request.course.uri" => $uri);
+ untie(%hash);
+ untie(%parmhash);
+ last;
+ }
+ }
+ untie(%hash);
+ untie(%parmhash);
+ }
+ flock(LOCKFILE,LOCK_UN);
+ close(LOCKFILE);
}
- &Apache::lonmsg::author_res_msg($ENV{'request.course.uri'},$errtext);
+ &Apache::lonmsg::author_res_msg($env{'request.course.uri'},$errtext);
# ------------------------------------------------- Check for critical messages
- my @what=&Apache::lonnet::dump('critical',$ENV{'user.domain'},
- $ENV{'user.name'});
+ my @what=&Apache::lonnet::dump('critical',$env{'user.domain'},
+ $env{'user.name'});
if ($what[0]) {
if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
$retfurl='/adm/email?critical=display';
@@ -620,13 +781,14 @@ sub readmap {
# ------------------------------------------------------- Evaluate state string
sub evalstate {
- my $fn=$ENV{'request.course.fn'}.'.state';
+ my $fn=$env{'request.course.fn'}.'.state';
my $state='';
if (-e $fn) {
my @conditions=();
{
- my $fh=Apache::File->new($fn);
+ open(my $fh,"<$fn");
@conditions=<$fh>;
+ close($fh);
}
my $safeeval = new Safe;
my $safehole = new Safe::Hole;
@@ -652,10 +814,47 @@ sub evalstate {
}
}
}
- &Apache::lonnet::appenv('user.state.'.$ENV{'request.course.id'} => $state);
+ &Apache::lonnet::appenv('user.state.'.$env{'request.course.id'} => $state);
return $state;
}
+{
+ my %mapalias_cache;
+ sub count_mapalias {
+ my ($value,$resid) = @_;
+ push(@{ $mapalias_cache{$value} }, $resid);
+ }
+
+ sub get_mapalias_errors {
+ my $error_text;
+ foreach my $mapalias (sort(keys(%mapalias_cache))) {
+ next if (scalar(@{ $mapalias_cache{$mapalias} } ) == 1);
+ my $count;
+ my $which =
+ join('',
+ map {
+ my $id = $_;
+ if (exists($hash{'src_'.$id})) {
+ $count++;
+ }
+ my ($mapid) = split(/\./,$id);
+ &mt('Resource "[_1]"
in Map "[_2]"',
+ $hash{'title_'.$id},
+ $hash{'title_'.$hash{'ids_'.$hash{'map_id_'.$mapid}}});
+ } (@{ $mapalias_cache{$mapalias} }));
+ next if ($count < 2);
+ $error_text .= ''.
+ &mt('Error: Found the mapalias "[_1]" defined multiple times.',
+ $mapalias).
+ '
';
+ }
+ &clear_mapalias_count();
+ return $error_text;
+ }
+ sub clear_mapalias_count {
+ undef(%mapalias_cache);
+ }
+}
1;
__END__