Annotation of rat/lonuserstate.pm, revision 1.98
1.1 www 1: # The LearningOnline Network with CAPA
2: # Construct and maintain state and binary representation of course for user
3: #
1.98 ! albertel 4: # $Id: lonuserstate.pm,v 1.97 2005/11/09 11:39:57 www Exp $
1.25 www 5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
1.26 harris41 28: ###
1.1 www 29:
30: package Apache::lonuserstate;
31:
1.26 harris41 32: # ------------------------------------------------- modules used by this module
1.1 www 33: use strict;
34: use HTML::TokeParser;
1.89 albertel 35: use Apache::lonnet;
1.26 harris41 36: use Apache::loncommon();
1.1 www 37: use GDBM_File;
1.12 www 38: use Apache::lonmsg;
1.15 www 39: use Safe;
1.21 www 40: use Safe::Hole;
1.15 www 41: use Opcode;
1.73 www 42: use Apache::lonenc;
1.96 albertel 43: use Fcntl qw(:flock);
1.15 www 44:
1.1 www 45: # ---------------------------------------------------- Globals for this package
46:
47: my $pc; # Package counter
48: my %hash; # The big tied hash
1.19 www 49: my %parmhash;# The hash with the parameters
1.1 www 50: my @cond; # Array with all of the conditions
51: my $errtext; # variable with all errors
1.21 www 52: my $retfurl; # variable with the very first URL in the course
1.29 www 53: my %randompick; # randomly picked resources
1.51 www 54: my %randompickseed; # optional seed for randomly picking resources
1.73 www 55: my %encurl; # URLs in this folder are supposed to be encrypted
56: my %hiddenurl; # this URL (or complete folder) is supposed to be hidden
1.61 www 57:
58: # ----------------------------------- Remove version from URL and store in hash
59:
60: sub versiontrack {
61: my $uri=shift;
62: if ($uri=~/\.(\d+)\.\w+$/) {
63: my $version=$1;
64: $uri=~s/\.\d+\.(\w+)$/\.$1/;
1.62 www 65: unless ($hash{'version_'.$uri}) {
66: $hash{'version_'.$uri}=$version;
67: }
1.61 www 68: }
69: return $uri;
70: }
71:
72: # -------------------------------------------------------------- Put in version
73:
74: sub putinversion {
75: my $uri=shift;
1.93 www 76: my $key=$env{'request.course.id'}.'_'.&Apache::lonnet::clutter($uri);
1.61 www 77: if ($hash{'version_'.$uri}) {
78: my $version=$hash{'version_'.$uri};
1.65 www 79: if ($version eq 'mostrecent') { return $uri; }
1.66 www 80: if ($version eq &Apache::lonnet::getversion(
81: &Apache::lonnet::filelocation('',$uri)))
82: { return $uri; }
1.61 www 83: $uri=~s/\.(\w+)$/\.$version\.$1/;
84: }
1.93 www 85: &Apache::lonnet::do_cache_new('courseresversion',$key,&Apache::lonnet::declutter($uri),600);
1.61 www 86: return $uri;
87: }
88:
89: # ----------------------------------------- Processing versions file for course
90:
91: sub processversionfile {
1.64 www 92: my %cenv=@_;
1.61 www 93: my %versions=&Apache::lonnet::dump('resourceversions',
94: $cenv{'domain'},
95: $cenv{'num'});
96: foreach (keys %versions) {
97: if ($_=~/^error\:/) { return; }
1.62 www 98: $hash{'version_'.$_}=$versions{$_};
1.61 www 99: }
100: }
1.45 www 101:
1.1 www 102: # --------------------------------------------------------- Loads map from disk
103:
104: sub loadmap {
105: my $uri=shift;
1.98 ! albertel 106: if ($hash{'map_pc_'.$uri}) { return; }
1.1 www 107:
108: $pc++;
109: my $lpc=$pc;
110: $hash{'map_pc_'.$uri}=$lpc;
111: $hash{'map_id_'.$lpc}=$uri;
112:
1.37 www 113: # Determine and check filename
1.62 www 114: my $fn=&Apache::lonnet::filelocation('',&putinversion($uri));
1.37 www 115:
116: my $ispage=($fn=~/\.page$/);
1.1 www 117:
1.10 www 118: unless (($fn=~/\.sequence$/) ||
1.1 www 119: ($fn=~/\.page$/)) {
1.85 albertel 120: $errtext.="Invalid map: $fn\n";
1.98 ! albertel 121: return;
1.1 www 122: }
123:
1.37 www 124: my $instr=&Apache::lonnet::getfile($fn);
125:
1.57 albertel 126: unless ($instr eq -1) {
1.22 www 127:
1.37 www 128: # Successfully got file, parse it
1.1 www 129:
130: my $parser = HTML::TokeParser->new(\$instr);
1.95 www 131: $parser->attr_encoded(1);
1.1 www 132: my $token;
133:
134: my $linkpc=0;
135:
136: $fn=~/\.(\w+)$/;
137:
138: $hash{'map_type_'.$lpc}=$1;
139:
140: while ($token = $parser->get_token) {
141: if ($token->[0] eq 'S') {
142: if ($token->[1] eq 'resource') {
143: # -------------------------------------------------------------------- Resource
1.92 www 144: if ($token->[2]->{'type'} eq 'zombie') { next; }
1.1 www 145: my $rid=$lpc.'.'.$token->[2]->{'id'};
146:
147: $hash{'kind_'.$rid}='res';
148: $hash{'title_'.$rid}=$token->[2]->{'title'};
1.61 www 149: my $turi=&versiontrack($token->[2]->{'src'});
150: if ($token->[2]->{'version'}) {
1.62 www 151: unless ($hash{'version_'.$turi}) {
152: $hash{'version_'.$turi}=$1;
153: }
1.61 www 154: }
1.83 albertel 155: my $title=$token->[2]->{'title'};
156: $title=~s/\&colon\;/\:/gs;
1.84 albertel 157: # my $symb=&Apache::lonnet::encode_symb($uri,
158: # $token->[2]->{'id'},
159: # $turi);
160: # &Apache::lonnet::do_cache_new('title',$symb,$title);
1.22 www 161: unless ($ispage) {
162: $turi=~/\.(\w+)$/;
1.26 harris41 163: my $embstyle=&Apache::loncommon::fileembstyle($1);
1.40 www 164: if ($token->[2]->{'external'} eq 'true') { # external
1.22 www 165: $turi=~s/^http\:\/\//\/adm\/wrapper\/ext\//;
1.40 www 166: } elsif ($turi=~/^\/*uploaded\//) { # uploaded
1.97 www 167: if (($embstyle eq 'img')
168: || ($embstyle eq 'emb')
169: || ($embstyle eq 'ign')
170: || ($embstyle eq 'unk')) {
1.76 albertel 171: $turi='/adm/wrapper'.$turi;
1.78 albertel 172: } elsif ($embstyle eq 'ssi') {
173: #do nothing with these
174: } elsif ($turi!~/\.(sequence|page)$/) {
1.42 www 175: $turi='/adm/coursedocs/showdoc'.$turi;
1.40 www 176: }
1.70 www 177: } elsif ($turi=~/\S/) { # normal non-empty internal resource
1.68 www 178: my $mapdir=$uri;
179: $mapdir=~s/[^\/]+$//;
180: $turi=&Apache::lonnet::hreflocation($mapdir,$turi);
181: if (($embstyle eq 'img') || ($embstyle eq 'emb')) {
182: $turi='/adm/wrapper'.$turi;
183: }
1.22 www 184: }
185: }
1.71 www 186: # Store reverse lookup, remove query string
187: my $idsuri=$turi;
188: $idsuri=~s/\?.+$//;
189: if (defined($hash{'ids_'.$idsuri})) {
190: $hash{'ids_'.$idsuri}.=','.$rid;
1.1 www 191: } else {
1.71 www 192: $hash{'ids_'.$idsuri}=''.$rid;
1.1 www 193: }
1.53 www 194:
1.85 albertel 195: if ($turi=~/\/(syllabus|aboutme|navmaps|smppg|bulletinboard)$/) {
1.53 www 196: $turi.='?register=1';
197: }
198:
199: $hash{'src_'.$rid}=$turi;
1.1 www 200:
1.22 www 201: if ($token->[2]->{'external'} eq 'true') {
1.1 www 202: $hash{'ext_'.$rid}='true:';
203: } else {
204: $hash{'ext_'.$rid}='false:';
205: }
206: if ($token->[2]->{'type'}) {
207: $hash{'type_'.$rid}=$token->[2]->{'type'};
1.2 www 208: if ($token->[2]->{'type'} eq 'start') {
209: $hash{'map_start_'.$uri}="$rid";
210: }
211: if ($token->[2]->{'type'} eq 'finish') {
212: $hash{'map_finish_'.$uri}="$rid";
213: }
1.1 www 214: } else {
215: $hash{'type_'.$rid}='normal';
216: }
217:
1.10 www 218: if (($turi=~/\.sequence$/) ||
1.1 www 219: ($turi=~/\.page$/)) {
1.2 www 220: $hash{'is_map_'.$rid}=1;
1.1 www 221: &loadmap($turi);
222: }
223:
224: } elsif ($token->[1] eq 'condition') {
225: # ------------------------------------------------------------------- Condition
226:
227: my $rid=$lpc.'.'.$token->[2]->{'id'};
228:
229: $hash{'kind_'.$rid}='cond';
1.2 www 230: $cond[$#cond+1]=$token->[2]->{'value'};
231: $hash{'condid_'.$rid}=$#cond;
1.1 www 232: if ($token->[2]->{'type'}) {
1.2 www 233: $cond[$#cond].=':'.$token->[2]->{'type'};
1.1 www 234: } else {
1.2 www 235: $cond[$#cond].=':normal';
1.1 www 236: }
237:
238: } elsif ($token->[1] eq 'link') {
239: # ----------------------------------------------------------------------- Links
240:
241: $linkpc++;
242: my $linkid=$lpc.'.'.$linkpc;
243:
244: my $goesto=$lpc.'.'.$token->[2]->{'to'};
245: my $comesfrom=$lpc.'.'.$token->[2]->{'from'};
246: my $undercond=0;
247:
248: if ($token->[2]->{'condition'}) {
249: $undercond=$lpc.'.'.$token->[2]->{'condition'};
250: }
251:
252: $hash{'goesto_'.$linkid}=$goesto;
253: $hash{'comesfrom_'.$linkid}=$comesfrom;
254: $hash{'undercond_'.$linkid}=$undercond;
255:
256: if (defined($hash{'to_'.$comesfrom})) {
257: $hash{'to_'.$comesfrom}.=','.$linkid;
258: } else {
259: $hash{'to_'.$comesfrom}=''.$linkid;
260: }
261: if (defined($hash{'from_'.$goesto})) {
262: $hash{'from_'.$goesto}.=','.$linkid;
263: } else {
264: $hash{'from_'.$goesto}=''.$linkid;
265: }
1.18 www 266: } elsif ($token->[1] eq 'param') {
267: # ------------------------------------------------------------------- Parameter
268:
269: my $referid=$lpc.'.'.$token->[2]->{'to'};
1.63 albertel 270: my $name=$token->[2]->{'name'};
271: my $part;
272: if ($name=~/^parameter_(.*)_/) {
273: $part=$1;
274: } else {
275: $part=0;
276: }
277: $name=~s/^.*_([^_]*)$/$1/;
1.18 www 278: my $newparam=
279: &Apache::lonnet::escape($token->[2]->{'type'}).':'.
1.63 albertel 280: &Apache::lonnet::escape($part.'.'.$name).'='.
1.18 www 281: &Apache::lonnet::escape($token->[2]->{'value'});
282: if (defined($hash{'param_'.$referid})) {
283: $hash{'param_'.$referid}.='&'.$newparam;
284: } else {
285: $hash{'param_'.$referid}=''.$newparam;
286: }
1.75 www 287: if ($token->[2]->{'name'}=~/^parameter_(0_)*mapalias$/) {
1.28 www 288: $hash{'mapalias_'.$token->[2]->{'value'}}=$referid;
289: }
1.75 www 290: if ($token->[2]->{'name'}=~/^parameter_(0_)*randompick$/) {
1.29 www 291: $randompick{$referid}=$token->[2]->{'value'};
292: }
1.75 www 293: if ($token->[2]->{'name'}=~/^parameter_(0_)*randompickseed$/) {
1.51 www 294: $randompick{$referid}=$token->[2]->{'value'};
295: }
1.75 www 296: if ($token->[2]->{'name'}=~/^parameter_(0_)*encrypturl$/) {
1.74 www 297: if ($token->[2]->{'value'}=~/^yes$/i) {
298: $encurl{$referid}=1;
299: }
1.73 www 300: }
1.75 www 301: if ($token->[2]->{'name'}=~/^parameter_(0_)*hiddenresource$/) {
1.74 www 302: if ($token->[2]->{'value'}=~/^yes$/i) {
303: $hiddenurl{$referid}=1;
304: }
1.73 www 305: }
1.1 www 306: }
1.85 albertel 307:
1.1 www 308: }
309: }
310:
311: } else {
1.84 albertel 312: $errtext.='Map not loaded: The file ('.$fn.') does not exist. ';
1.1 www 313: }
314: }
315:
1.3 www 316: # --------------------------------------------------------- Simplify expression
317:
318: sub simplify {
1.85 albertel 319: my $expression=shift;
1.3 www 320: # (8)=8
1.85 albertel 321: $expression=~s/\((\d+)\)/$1/g;
1.3 www 322: # 8&8=8
1.85 albertel 323: $expression=~s/(\D)(\d+)\&\2(\D)/$1$2$3/g;
1.3 www 324: # 8|8=8
1.85 albertel 325: $expression=~s/(\D)(\d+)\|\2(\D)/$1$2$3/g;
1.3 www 326: # (5&3)&4=5&3&4
1.85 albertel 327: $expression=~s/\((\d+)((?:\&\d+)+)\)\&(\d+\D)/$1$2\&$3/g;
1.3 www 328: # (((5&3)|(4&6)))=((5&3)|(4&6))
1.85 albertel 329: $expression=~
330: s/\((\(\(\d+(?:\&\d+)*\)(?:\|\(\d+(?:\&\d+)*\))+\))\)/$1/g;
1.3 www 331: # ((5&3)|(4&6))|(1&2)=(5&3)|(4&6)|(1&2)
1.85 albertel 332: $expression=~
333: s/\((\(\d+(?:\&\d+)*\))((?:\|\(\d+(?:\&\d+)*\))+)\)\|(\(\d+(?:\&\d+)*\))/\($1$2\|$3\)/g;
334: return $expression;
1.3 www 335: }
336:
1.2 www 337: # -------------------------------------------------------- Build condition hash
338:
339: sub traceroute {
1.77 www 340: my ($sofar,$rid,$beenhere,$encflag,$hdnflag)=@_;
1.81 albertel 341: my $newsofar=$sofar=simplify($sofar);
1.2 www 342: unless ($beenhere=~/\&$rid\&/) {
1.85 albertel 343: $beenhere.=$rid.'&';
344: my ($mapid,$resid)=split(/\./,$rid);
345: my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,$hash{'src_'.$rid});
346: my $hidden=&Apache::lonnet::EXT('resource.0.hiddenresource',$symb);
1.91 albertel 347:
1.90 albertel 348: if ($hdnflag || lc($hidden) eq 'yes') {
349: $hiddenurl{$rid}=1;
1.91 albertel 350: }
351: if (!$hdnflag && lc($hidden) eq 'no') {
1.90 albertel 352: delete($hiddenurl{$rid});
353: }
1.91 albertel 354:
1.85 albertel 355: my $encrypt=&Apache::lonnet::EXT('resource.0.encrypturl',$symb);
356: if ($encflag || lc($encrypt) eq 'yes') { $encurl{$rid}=1; }
357: if (($retfurl eq '') && ($hash{'src_'.$rid})
358: && ($hash{'src_'.$rid}!~/\.sequence$/)) {
359: $retfurl=$hash{'src_'.$rid}.(($hash{'src_'.$rid}=~/\?/)?'&':'?').
360: 'symb='.$symb;
361: }
362: if (defined($hash{'conditions_'.$rid})) {
363: $hash{'conditions_'.$rid}=simplify(
1.3 www 364: '('.$hash{'conditions_'.$rid}.')|('.$sofar.')');
1.85 albertel 365: } else {
366: $hash{'conditions_'.$rid}=$sofar;
367: }
368: $newsofar=$hash{'conditions_'.$rid};
369: if (defined($hash{'is_map_'.$rid})) {
370: if (defined($hash{'map_start_'.$hash{'src_'.$rid}})) {
371: $sofar=$newsofar=
372: &traceroute($sofar,
373: $hash{'map_start_'.$hash{'src_'.$rid}},'&',
374: $encflag || $encurl{$rid},
375: $hdnflag || $hiddenurl{$rid});
376: }
377: }
378: if (defined($hash{'to_'.$rid})) {
379: foreach (split(/\,/,$hash{'to_'.$rid})) {
1.2 www 380: my $further=$sofar;
381: if ($hash{'undercond_'.$_}) {
1.85 albertel 382: if (defined($hash{'condid_'.$hash{'undercond_'.$_}})) {
383: $further=simplify('('.$further.')&('.
384: $hash{'condid_'.$hash{'undercond_'.$_}}.')');
385: } else {
386: $errtext.='Undefined condition ID: '
387: .$hash{'undercond_'.$_}.'. ';
388: }
1.2 www 389: }
1.81 albertel 390: $newsofar=&traceroute($further,$hash{'goesto_'.$_},$beenhere,
391: $encflag,$hdnflag);
1.85 albertel 392: }
393: }
1.2 www 394: }
1.81 albertel 395: return $newsofar;
1.2 www 396: }
1.1 www 397:
1.19 www 398: # ------------------------------ Cascading conditions, quick access, parameters
1.4 www 399:
400: sub accinit {
401: my ($uri,$short,$fn)=@_;
402: my %acchash=();
403: my %captured=();
404: my $condcounter=0;
1.5 www 405: $acchash{'acc.cond.'.$short.'.0'}=0;
1.26 harris41 406: foreach (keys %hash) {
1.85 albertel 407: if ($_=~/^conditions/) {
408: my $expr=$hash{$_};
409: foreach ($expr=~m/(\(\(\d+(?:\&\d+)+\)(?:\|\(\d+(?:\&\d+)+\))+\))/g) {
410: my $sub=$_;
411: my $orig=$_;
412: $sub=~/\(\((\d+\&(:?\d+\&)*)(?:\d+\&*)+\)(?:\|\(\1(?:\d+\&*)+\))+\)/;
413: my $factor=$1;
414: $sub=~s/$factor//g;
415: $sub=~s/^\(/\($factor\(/;
416: $sub.=')';
417: $sub=simplify($sub);
418: $orig=~s/(\W)/\\$1/g;
419: $expr=~s/$orig/$sub/;
420: }
421: $hash{$_}=$expr;
422: unless (defined($captured{$expr})) {
423: $condcounter++;
424: $captured{$expr}=$condcounter;
425: $acchash{'acc.cond.'.$short.'.'.$condcounter}=$expr;
426: }
427: } elsif ($_=~/^param_(\d+)\.(\d+)/) {
1.86 albertel 428: my $prefix=&Apache::lonnet::encode_symb($hash{'map_id_'.$1},$2,
429: $hash{'src_'.$1.'.'.$2});
1.85 albertel 430: foreach (split(/\&/,$hash{$_})) {
431: my ($typename,$value)=split(/\=/,$_);
432: my ($type,$name)=split(/\:/,$typename);
433: $parmhash{$prefix.'.'.&Apache::lonnet::unescape($name)}=
434: &Apache::lonnet::unescape($value);
435: $parmhash{$prefix.'.'.&Apache::lonnet::unescape($name).'.type'}=
436: &Apache::lonnet::unescape($type);
437: }
438: }
1.26 harris41 439: }
440: foreach (keys %hash) {
1.4 www 441: if ($_=~/^ids/) {
1.85 albertel 442: foreach (split(/\,/,$hash{$_})) {
443: my $resid=$_;
444: my $uri=$hash{'src_'.$resid};
445: $uri=~s/^\/adm\/wrapper//;
446: $uri=&Apache::lonnet::declutter($uri);
447: my @uriparts=split(/\//,$uri);
448: my $urifile=$uriparts[$#uriparts];
449: $#uriparts--;
450: my $uripath=join('/',@uriparts);
451: if ($uripath) {
452: my $uricond='0';
453: if (defined($hash{'conditions_'.$resid})) {
454: $uricond=$captured{$hash{'conditions_'.$resid}};
455: }
456: if (defined($acchash{'acc.res.'.$short.'.'.$uripath})) {
457: if ($acchash{'acc.res.'.$short.'.'.$uripath}=~
458: /(\&\Q$urifile\E\:[^\&]*)/) {
459: my $replace=$1;
460: my $regexp=$replace;
461: #$regexp=~s/\|/\\\|/g;
462: $acchash{'acc.res.'.$short.'.'.$uripath}
463: =~s/\Q$regexp\E/$replace\|$uricond/;
464: } else {
465: $acchash{'acc.res.'.$short.'.'.$uripath}.=
466: $urifile.':'.$uricond.'&';
467: }
468: } else {
469: $acchash{'acc.res.'.$short.'.'.$uripath}=
470: '&'.$urifile.':'.$uricond.'&';
471: }
472: }
473: }
474: }
1.26 harris41 475: }
1.24 www 476: $acchash{'acc.res.'.$short.'.'}='&:0&';
1.8 www 477: my $courseuri=$uri;
478: $courseuri=~s/^\/res\///;
1.19 www 479: &Apache::lonnet::delenv('(acc\.|httpref\.)');
1.79 albertel 480: &Apache::lonnet::appenv(%acchash);
1.4 www 481: }
482:
1.73 www 483: # ---------------- Selectively delete from randompick maps and hidden url parms
1.29 www 484:
1.73 www 485: sub hiddenurls {
1.31 www 486: my $randomoutentry='';
1.29 www 487: foreach my $rid (keys %randompick) {
488: my $rndpick=$randompick{$rid};
489: my $mpc=$hash{'map_pc_'.$hash{'src_'.$rid}};
490: # ------------------------------------------- put existing resources into array
491: my @currentrids=();
1.50 albertel 492: foreach (sort(keys(%hash))) {
1.29 www 493: if ($_=~/^src_($mpc\.\d+)/) {
494: if ($hash{'src_'.$1}) { push @currentrids, $1; }
495: }
496: }
1.50 albertel 497: # rids are number.number and we want to numercially sort on
498: # the second number
499: @currentrids=sort {
500: my (undef,$aid)=split(/\./,$a);
501: my (undef,$bid)=split(/\./,$b);
502: $aid <=> $bid;
503: } @currentrids;
1.29 www 504: next if ($#currentrids<$rndpick);
505: # -------------------------------- randomly eliminate the ones that should stay
1.50 albertel 506: my (undef,$id)=split(/\./,$rid);
1.51 www 507: if ($randompickseed{$rid}) { $id=$randompickseed{$rid}; }
1.50 albertel 508: my $rndseed=&Apache::lonnet::rndseed($id); # use id instead of symb
1.58 albertel 509: &Apache::lonnet::setup_random_from_rndseed($rndseed);
1.50 albertel 510: my @whichids=&Math::Random::random_permuted_index($#currentrids+1);
511: for (my $i=1;$i<=$rndpick;$i++) { $currentrids[$whichids[$i]]=''; }
512: #&Apache::lonnet::logthis("$id,$rndseed,".join(':',@whichids));
1.29 www 513: # -------------------------------------------------------- delete the leftovers
514: for (my $k=0; $k<=$#currentrids; $k++) {
515: if ($currentrids[$k]) {
516: $hash{'randomout_'.$currentrids[$k]}=1;
1.32 www 517: my ($mapid,$resid)=split(/\./,$currentrids[$k]);
518: $randomoutentry.='&'.
1.86 albertel 519: &Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},
520: $resid,
521: $hash{'src_'.$currentrids[$k]}
522: ).'&';
1.29 www 523: }
524: }
1.31 www 525: }
1.73 www 526: # ------------------------------ take care of explicitly hidden urls or folders
527: foreach my $rid (keys %hiddenurl) {
528: $hash{'randomout_'.$rid}=1;
529: my ($mapid,$resid)=split(/\./,$rid);
530: $randomoutentry.='&'.
1.86 albertel 531: &Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,
532: $hash{'src_'.$rid}).'&';
1.73 www 533: }
534: # --------------------------------------- append randomout entry to environment
1.31 www 535: if ($randomoutentry) {
536: &Apache::lonnet::appenv('acc.randomout' => $randomoutentry);
1.29 www 537: }
538: }
539:
1.1 www 540: # ---------------------------------------------------- Read map and all submaps
541:
542: sub readmap {
1.85 albertel 543: my $short=shift;
544: $short=~s/^\///;
545: my %cenv=&Apache::lonnet::coursedescription($short);
546: my $fn=$cenv{'fn'};
547: my $uri;
548: $short=~s/\//\_/g;
549: unless ($uri=$cenv{'url'}) {
550: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
551: "Could not load course $short.</font>");
552: return 'No course data available.';
553: }
554: @cond=('true:normal');
1.96 albertel 555:
556: open(LOCKFILE,">$fn.db.lock");
557: my $lock=0;
558: if (flock(LOCKFILE,LOCK_EX|LOCK_NB)) {
559: $lock=1;
560: unlink($fn.'.db');
561: unlink($fn.'_symb.db');
562: unlink($fn.'.state');
563: unlink($fn.'parms.db');
564: }
1.85 albertel 565: undef %randompick;
566: undef %hiddenurl;
567: undef %encurl;
568: $retfurl='';
1.96 albertel 569: if ($lock && (tie(%hash,'GDBM_File',"$fn.db",&GDBM_WRCREAT(),0640)) &&
1.85 albertel 570: (tie(%parmhash,'GDBM_File',$fn.'_parms.db',&GDBM_WRCREAT(),0640))) {
571: %hash=();
572: %parmhash=();
573: $errtext='';
574: $pc=0;
575: &processversionfile(%cenv);
576: my $furi=&Apache::lonnet::clutter($uri);
577: $hash{'src_0.0'}=&versiontrack($furi);
578: $hash{'title_0.0'}=&Apache::lonnet::metadata($uri,'title');
579: $hash{'ids_'.$furi}='0.0';
580: $hash{'is_map_0.0'}=1;
581: loadmap($uri);
582: if (defined($hash{'map_start_'.$uri})) {
583: &Apache::lonnet::appenv("request.course.id" => $short,
584: "request.course.fn" => $fn,
585: "request.course.uri" => $uri);
586: &traceroute('0',$hash{'map_start_'.$uri},'&');
587: &accinit($uri,$short,$fn);
588: &hiddenurls();
589: }
1.62 www 590: # ------------------------------------------------------- Put versions into src
1.85 albertel 591: foreach (keys %hash) {
592: if ($_=~/^src\_/) {
593: $hash{$_}=&putinversion($hash{$_});
594: }
1.61 www 595: }
1.74 www 596: # ---------------------------------------------------------------- Encrypt URLs
1.85 albertel 597: foreach (keys %encurl) {
598: # $hash{'src_'.$_}=&Apache::lonenc::encrypted($hash{'src_'.$_});
599: $hash{'encrypted_'.$_}=1;
600: }
1.74 www 601: # ----------------------------------------------- Close hashes to finally store
602: # --------------------------------- Routine must pass this point, no early outs
1.94 albertel 603: $hash{'first_url'}=$retfurl;
1.85 albertel 604: unless ((untie(%hash)) && (untie(%parmhash))) {
605: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
606: "Could not untie coursemap $fn for $uri.</font>");
607: }
608: # ---------------------------------------------------- Store away initial state
609: {
610: my $cfh;
1.88 raeburn 611: if (open($cfh,">$fn.state")) {
1.85 albertel 612: print $cfh join("\n",@cond);
613: } else {
614: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
615: "Could not write statemap $fn for $uri.</font>");
616: }
1.96 albertel 617: }
618: flock(LOCKFILE,LOCK_UN);
619: close(LOCKFILE);
1.85 albertel 620: } else {
1.87 albertel 621: # if we are here it is likely because we are already trying to
622: # initialize the course in another child, busy wait trying to
623: # tie the hashes for the next 90 seconds, if we succeed forward
624: # them on to navmaps, if we fail, throw up the Could not init
625: # course screen
1.96 albertel 626: if ($lock) {
627: # Got the lock but not the DB files
628: flock(LOCKFILE,LOCK_UN);
629: }
1.87 albertel 630: untie(%hash);
631: untie(%parmhash);
1.85 albertel 632: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
633: "Could not tie coursemap $fn for $uri.</font>");
1.87 albertel 634: my $i=0;
635: while($i<90) {
636: $i++;
637: sleep(1);
1.96 albertel 638: if (flock(LOCKFILE,LOCK_EX|LOCK_NB) &&
639: (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER(),0640))) {
1.87 albertel 640: if (tie(%parmhash,'GDBM_File',$fn.'_parms.db',&GDBM_READER(),0640)) {
641: $retfurl='/adm/navmaps';
642: &Apache::lonnet::appenv("request.course.id" => $short,
643: "request.course.fn" => $fn,
644: "request.course.uri" => $uri);
645: untie(%hash);
646: untie(%parmhash);
647: last;
648: }
649: }
650: untie(%hash);
651: untie(%parmhash);
652: }
1.96 albertel 653: flock(LOCKFILE,LOCK_UN);
654: close(LOCKFILE);
1.1 www 655: }
1.89 albertel 656: &Apache::lonmsg::author_res_msg($env{'request.course.uri'},$errtext);
1.46 www 657: # ------------------------------------------------- Check for critical messages
658:
1.89 albertel 659: my @what=&Apache::lonnet::dump('critical',$env{'user.domain'},
660: $env{'user.name'});
1.46 www 661: if ($what[0]) {
662: if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
663: $retfurl='/adm/email?critical=display';
664: }
665: }
1.85 albertel 666: return ($retfurl,$errtext);
1.1 www 667: }
1.15 www 668:
669: # ------------------------------------------------------- Evaluate state string
670:
671: sub evalstate {
1.89 albertel 672: my $fn=$env{'request.course.fn'}.'.state';
1.80 albertel 673: my $state='';
1.15 www 674: if (-e $fn) {
1.80 albertel 675: my @conditions=();
676: {
677: my $fh=Apache::File->new($fn);
678: @conditions=<$fh>;
679: }
680: my $safeeval = new Safe;
681: my $safehole = new Safe::Hole;
682: $safeeval->permit("entereval");
683: $safeeval->permit(":base_math");
684: $safeeval->deny(":base_io");
685: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
686: foreach my $line (@conditions) {
687: chomp($line);
688: my ($condition,$weight)=split(/\:/,$line);
689: if ($safeeval->reval($condition)) {
690: if ($weight eq 'force') {
691: $state.='3';
692: } else {
693: $state.='2';
694: }
695: } else {
696: if ($weight eq 'stop') {
697: $state.='0';
698: } else {
699: $state.='1';
700: }
701: }
702: }
1.15 www 703: }
1.89 albertel 704: &Apache::lonnet::appenv('user.state.'.$env{'request.course.id'} => $state);
1.15 www 705: return $state;
706: }
707:
1.1 www 708: 1;
709: __END__
710:
1.26 harris41 711: =head1 NAME
712:
713: Apache::lonuserstate - Construct and maintain state and binary representation
714: of course for user
715:
716: =head1 SYNOPSIS
717:
718: Invoked by lonroles.pm.
719:
720: &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
721:
722: =head1 INTRODUCTION
723:
724: This module constructs and maintains state and binary representation
725: of course for user.
726:
727: This is part of the LearningOnline Network with CAPA project
728: described at http://www.lon-capa.org.
729:
730: =head1 HANDLER SUBROUTINE
731:
732: There is no handler subroutine.
733:
734: =head1 OTHER SUBROUTINES
735:
736: =over 4
737:
738: =item *
739:
740: loadmap() : Loads map from disk
741:
742: =item *
743:
744: simplify() : Simplify expression
745:
746: =item *
747:
748: traceroute() : Build condition hash
749:
750: =item *
751:
752: accinit() : Cascading conditions, quick access, parameters
1.1 www 753:
1.26 harris41 754: =item *
1.1 www 755:
1.26 harris41 756: readmap() : Read map and all submaps
1.1 www 757:
1.26 harris41 758: =item *
1.1 www 759:
1.26 harris41 760: evalstate() : Evaluate state string
1.1 www 761:
1.26 harris41 762: =back
1.1 www 763:
1.26 harris41 764: =cut
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonuserstate.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / rat