Annotation of rat/lonuserstate.pm, revision 1.72
1.1 www 1: # The LearningOnline Network with CAPA
2: # Construct and maintain state and binary representation of course for user
3: #
1.72 ! raeburn 4: # $Id: lonuserstate.pm,v 1.71 2004/02/02 00:46:51 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 Apache::Constants qw(:common :http);
35: use Apache::File;
36: use HTML::TokeParser;
37: use Apache::lonnet();
1.26 harris41 38: use Apache::loncommon();
1.1 www 39: use GDBM_File;
1.12 www 40: use Apache::lonmsg;
1.15 www 41: use Safe;
1.21 www 42: use Safe::Hole;
1.15 www 43: use Opcode;
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
1.61 www 55:
56: # ----------------------------------- Remove version from URL and store in hash
57:
58: sub versiontrack {
59: my $uri=shift;
60: if ($uri=~/\.(\d+)\.\w+$/) {
61: my $version=$1;
62: $uri=~s/\.\d+\.(\w+)$/\.$1/;
1.62 www 63: unless ($hash{'version_'.$uri}) {
64: $hash{'version_'.$uri}=$version;
65: }
1.61 www 66: }
67: return $uri;
68: }
69:
70: # -------------------------------------------------------------- Put in version
71:
72: sub putinversion {
73: my $uri=shift;
74: if ($hash{'version_'.$uri}) {
75: my $version=$hash{'version_'.$uri};
1.65 www 76: if ($version eq 'mostrecent') { return $uri; }
1.66 www 77: if ($version eq &Apache::lonnet::getversion(
78: &Apache::lonnet::filelocation('',$uri)))
79: { return $uri; }
1.61 www 80: $uri=~s/\.(\w+)$/\.$version\.$1/;
81: }
82: return $uri;
83: }
84:
85: # ----------------------------------------- Processing versions file for course
86:
87: sub processversionfile {
1.64 www 88: my %cenv=@_;
1.61 www 89: my %versions=&Apache::lonnet::dump('resourceversions',
90: $cenv{'domain'},
91: $cenv{'num'});
92: foreach (keys %versions) {
93: if ($_=~/^error\:/) { return; }
1.62 www 94: $hash{'version_'.$_}=$versions{$_};
1.61 www 95: }
96: }
1.45 www 97:
1.1 www 98: # --------------------------------------------------------- Loads map from disk
99:
100: sub loadmap {
101: my $uri=shift;
102: if ($hash{'map_pc_'.$uri}) { return OK; }
103:
104: $pc++;
105: my $lpc=$pc;
106: $hash{'map_pc_'.$uri}=$lpc;
107: $hash{'map_id_'.$lpc}=$uri;
108:
1.37 www 109: # Determine and check filename
1.62 www 110: my $fn=&Apache::lonnet::filelocation('',&putinversion($uri));
1.37 www 111:
112: my $ispage=($fn=~/\.page$/);
1.1 www 113:
1.10 www 114: unless (($fn=~/\.sequence$/) ||
1.1 www 115: ($fn=~/\.page$/)) {
116: $errtext.="Invalid map: $fn\n";
117: return OK;
118: }
119:
1.37 www 120: my $instr=&Apache::lonnet::getfile($fn);
121:
1.57 albertel 122: unless ($instr eq -1) {
1.22 www 123:
1.37 www 124: # Successfully got file, parse it
1.1 www 125:
126: my $parser = HTML::TokeParser->new(\$instr);
127: my $token;
128:
129: my $linkpc=0;
130:
131: $fn=~/\.(\w+)$/;
132:
133: $hash{'map_type_'.$lpc}=$1;
134:
135: while ($token = $parser->get_token) {
136: if ($token->[0] eq 'S') {
137: if ($token->[1] eq 'resource') {
138: # -------------------------------------------------------------------- Resource
139:
140: my $rid=$lpc.'.'.$token->[2]->{'id'};
141:
142: $hash{'kind_'.$rid}='res';
143: $hash{'title_'.$rid}=$token->[2]->{'title'};
1.61 www 144: my $turi=&versiontrack($token->[2]->{'src'});
145: if ($token->[2]->{'version'}) {
1.62 www 146: unless ($hash{'version_'.$turi}) {
147: $hash{'version_'.$turi}=$1;
148: }
1.61 www 149: }
1.60 albertel 150: &Apache::lonnet::do_cache(\%Apache::lonnet::titlecache,
1.63 albertel 151: &Apache::lonnet::encode_symb($uri,$token->[2]->{'id'},
152: $turi),
153: $token->[2]->{'title'},'title');
1.22 www 154: unless ($ispage) {
155: $turi=~/\.(\w+)$/;
1.26 harris41 156: my $embstyle=&Apache::loncommon::fileembstyle($1);
1.40 www 157: if ($token->[2]->{'external'} eq 'true') { # external
1.22 www 158: $turi=~s/^http\:\/\//\/adm\/wrapper\/ext\//;
1.40 www 159: } elsif ($turi=~/^\/*uploaded\//) { # uploaded
160: if (($embstyle eq 'img') || ($embstyle eq 'emb')
161: || ($embstyle eq 'ssi')) {
1.72 ! raeburn 162: unless ($turi =~/\.page$/) {
! 163: $turi='/adm/wrapper'.$turi;
! 164: }
1.41 www 165: } elsif ($turi!~/\.(sequence|page)$/) {
1.42 www 166: $turi='/adm/coursedocs/showdoc'.$turi;
1.40 www 167: }
1.70 www 168: } elsif ($turi=~/\S/) { # normal non-empty internal resource
1.68 www 169: my $mapdir=$uri;
170: $mapdir=~s/[^\/]+$//;
171: $turi=&Apache::lonnet::hreflocation($mapdir,$turi);
172: if (($embstyle eq 'img') || ($embstyle eq 'emb')) {
173: $turi='/adm/wrapper'.$turi;
174: }
1.22 www 175: }
176: }
1.71 www 177: # Store reverse lookup, remove query string
178: my $idsuri=$turi;
179: $idsuri=~s/\?.+$//;
180: if (defined($hash{'ids_'.$idsuri})) {
181: $hash{'ids_'.$idsuri}.=','.$rid;
1.1 www 182: } else {
1.71 www 183: $hash{'ids_'.$idsuri}=''.$rid;
1.1 www 184: }
1.53 www 185:
186: if
187: ($turi=~/\/(syllabus|aboutme|navmaps|smppg|bulletinboard)$/) {
188: $turi.='?register=1';
189: }
190:
191: $hash{'src_'.$rid}=$turi;
1.1 www 192:
1.22 www 193: if ($token->[2]->{'external'} eq 'true') {
1.1 www 194: $hash{'ext_'.$rid}='true:';
195: } else {
196: $hash{'ext_'.$rid}='false:';
197: }
198: if ($token->[2]->{'type'}) {
199: $hash{'type_'.$rid}=$token->[2]->{'type'};
1.2 www 200: if ($token->[2]->{'type'} eq 'start') {
201: $hash{'map_start_'.$uri}="$rid";
202: }
203: if ($token->[2]->{'type'} eq 'finish') {
204: $hash{'map_finish_'.$uri}="$rid";
205: }
1.1 www 206: } else {
207: $hash{'type_'.$rid}='normal';
208: }
209:
1.10 www 210: if (($turi=~/\.sequence$/) ||
1.1 www 211: ($turi=~/\.page$/)) {
1.2 www 212: $hash{'is_map_'.$rid}=1;
1.1 www 213: &loadmap($turi);
214: }
215:
216: } elsif ($token->[1] eq 'condition') {
217: # ------------------------------------------------------------------- Condition
218:
219: my $rid=$lpc.'.'.$token->[2]->{'id'};
220:
221: $hash{'kind_'.$rid}='cond';
1.2 www 222: $cond[$#cond+1]=$token->[2]->{'value'};
223: $hash{'condid_'.$rid}=$#cond;
1.1 www 224: if ($token->[2]->{'type'}) {
1.2 www 225: $cond[$#cond].=':'.$token->[2]->{'type'};
1.1 www 226: } else {
1.2 www 227: $cond[$#cond].=':normal';
1.1 www 228: }
229:
230: } elsif ($token->[1] eq 'link') {
231: # ----------------------------------------------------------------------- Links
232:
233: $linkpc++;
234: my $linkid=$lpc.'.'.$linkpc;
235:
236: my $goesto=$lpc.'.'.$token->[2]->{'to'};
237: my $comesfrom=$lpc.'.'.$token->[2]->{'from'};
238: my $undercond=0;
239:
240: if ($token->[2]->{'condition'}) {
241: $undercond=$lpc.'.'.$token->[2]->{'condition'};
242: }
243:
244: $hash{'goesto_'.$linkid}=$goesto;
245: $hash{'comesfrom_'.$linkid}=$comesfrom;
246: $hash{'undercond_'.$linkid}=$undercond;
247:
248: if (defined($hash{'to_'.$comesfrom})) {
249: $hash{'to_'.$comesfrom}.=','.$linkid;
250: } else {
251: $hash{'to_'.$comesfrom}=''.$linkid;
252: }
253: if (defined($hash{'from_'.$goesto})) {
254: $hash{'from_'.$goesto}.=','.$linkid;
255: } else {
256: $hash{'from_'.$goesto}=''.$linkid;
257: }
1.18 www 258: } elsif ($token->[1] eq 'param') {
259: # ------------------------------------------------------------------- Parameter
260:
261: my $referid=$lpc.'.'.$token->[2]->{'to'};
1.63 albertel 262: my $name=$token->[2]->{'name'};
263: my $part;
264: if ($name=~/^parameter_(.*)_/) {
265: $part=$1;
266: } else {
267: $part=0;
268: }
269: $name=~s/^.*_([^_]*)$/$1/;
1.18 www 270: my $newparam=
271: &Apache::lonnet::escape($token->[2]->{'type'}).':'.
1.63 albertel 272: &Apache::lonnet::escape($part.'.'.$name).'='.
1.18 www 273: &Apache::lonnet::escape($token->[2]->{'value'});
274: if (defined($hash{'param_'.$referid})) {
275: $hash{'param_'.$referid}.='&'.$newparam;
276: } else {
277: $hash{'param_'.$referid}=''.$newparam;
278: }
1.29 www 279: if ($token->[2]->{'name'} eq 'parameter_mapalias') {
1.28 www 280: $hash{'mapalias_'.$token->[2]->{'value'}}=$referid;
281: }
1.29 www 282: if ($token->[2]->{'name'} eq 'parameter_randompick') {
283: $randompick{$referid}=$token->[2]->{'value'};
284: }
1.51 www 285: if ($token->[2]->{'name'} eq 'parameter_randompickseed') {
286: $randompick{$referid}=$token->[2]->{'value'};
287: }
1.1 www 288: }
289:
290: }
291: }
292:
293: } else {
294: $errtext.='Map not loaded: The file does not exist. ';
295: }
296: }
297:
1.3 www 298: # --------------------------------------------------------- Simplify expression
299:
300: sub simplify {
301: my $expression=shift;
302: # (8)=8
303: $expression=~s/\((\d+)\)/$1/g;
304: # 8&8=8
1.7 www 305: $expression=~s/(\D)(\d+)\&\2(\D)/$1$2$3/g;
1.3 www 306: # 8|8=8
1.7 www 307: $expression=~s/(\D)(\d+)\|\2(\D)/$1$2$3/g;
1.3 www 308: # (5&3)&4=5&3&4
1.7 www 309: $expression=~s/\((\d+)((?:\&\d+)+)\)\&(\d+\D)/$1$2\&$3/g;
1.3 www 310: # (((5&3)|(4&6)))=((5&3)|(4&6))
311: $expression=~
312: s/\((\(\(\d+(?:\&\d+)*\)(?:\|\(\d+(?:\&\d+)*\))+\))\)/$1/g;
313: # ((5&3)|(4&6))|(1&2)=(5&3)|(4&6)|(1&2)
314: $expression=~
315: s/\((\(\d+(?:\&\d+)*\))((?:\|\(\d+(?:\&\d+)*\))+)\)\|(\(\d+(?:\&\d+)*\))/\($1$2\|$3\)/g;
316: return $expression;
317: }
318:
1.2 www 319: # -------------------------------------------------------- Build condition hash
320:
321: sub traceroute {
1.3 www 322: my ($sofar,$rid,$beenhere)=@_;
323: $sofar=simplify($sofar);
1.2 www 324: unless ($beenhere=~/\&$rid\&/) {
325: $beenhere.=$rid.'&';
1.48 www 326: if (($retfurl eq '') && ($hash{'src_'.$rid})
327: && ($hash{'src_'.$rid}!~/\.sequence$/)) {
1.29 www 328: my ($mapid,$resid)=split(/\./,$rid);
1.35 www 329: $retfurl=$hash{'src_'.$rid}.
330: (($hash{'src_'.$rid}=~/\?/)?'&':'?').'symb='.
1.29 www 331: &Apache::lonnet::symbclean(
332: &Apache::lonnet::declutter($hash{'map_id_'.$mapid}).
333: '___'.$resid.'___'.
334: &Apache::lonnet::declutter($hash{'src_'.$rid}));
1.21 www 335: }
1.2 www 336: if (defined($hash{'conditions_'.$rid})) {
1.3 www 337: $hash{'conditions_'.$rid}=simplify(
338: '('.$hash{'conditions_'.$rid}.')|('.$sofar.')');
1.2 www 339: } else {
340: $hash{'conditions_'.$rid}=$sofar;
341: }
342: if (defined($hash{'is_map_'.$rid})) {
1.3 www 343: if (defined($hash{'map_start_'.$hash{'src_'.$rid}})) {
344: &traceroute($sofar,$hash{'map_start_'.$hash{'src_'.$rid}},'&');
345: if (defined($hash{'map_finish_'.$hash{'src_'.$rid}})) {
346: $sofar=
347: $hash{'conditions_'.$hash{'map_finish_'.$hash{'src_'.$rid}}};
348: }
1.2 www 349: }
350: }
351: if (defined($hash{'to_'.$rid})) {
1.26 harris41 352: foreach (split(/\,/,$hash{'to_'.$rid})) {
1.2 www 353: my $further=$sofar;
354: if ($hash{'undercond_'.$_}) {
355: if (defined($hash{'condid_'.$hash{'undercond_'.$_}})) {
1.3 www 356: $further=simplify('('.$further.')&('.
357: $hash{'condid_'.$hash{'undercond_'.$_}}.')');
1.2 www 358: } else {
359: $errtext.='Undefined condition ID: '
360: .$hash{'undercond_'.$_}.'. ';
361: }
362: }
363: &traceroute($further,$hash{'goesto_'.$_},$beenhere);
1.26 harris41 364: }
1.2 www 365: }
366: }
367: }
1.1 www 368:
1.19 www 369: # ------------------------------ Cascading conditions, quick access, parameters
1.4 www 370:
371: sub accinit {
372: my ($uri,$short,$fn)=@_;
373: my %acchash=();
374: my %captured=();
375: my $condcounter=0;
1.5 www 376: $acchash{'acc.cond.'.$short.'.0'}=0;
1.26 harris41 377: foreach (keys %hash) {
1.4 www 378: if ($_=~/^conditions/) {
379: my $expr=$hash{$_};
1.26 harris41 380: foreach ($expr=~m/(\(\(\d+(?:\&\d+)+\)(?:\|\(\d+(?:\&\d+)+\))+\))/g) {
1.4 www 381: my $sub=$_;
382: my $orig=$_;
1.13 www 383: $sub=~/\(\((\d+\&(:?\d+\&)*)(?:\d+\&*)+\)(?:\|\(\1(?:\d+\&*)+\))+\)/;
1.4 www 384: my $factor=$1;
1.7 www 385: $sub=~s/$factor//g;
386: $sub=~s/^\(/\($factor\(/;
1.4 www 387: $sub.=')';
388: $sub=simplify($sub);
389: $orig=~s/(\W)/\\$1/g;
1.7 www 390: $expr=~s/$orig/$sub/;
1.26 harris41 391: }
1.4 www 392: $hash{$_}=$expr;
393: unless (defined($captured{$expr})) {
394: $condcounter++;
395: $captured{$expr}=$condcounter;
1.5 www 396: $acchash{'acc.cond.'.$short.'.'.$condcounter}=$expr;
1.4 www 397: }
1.19 www 398: } elsif ($_=~/^param_(\d+)\.(\d+)/) {
399: my $prefix=&Apache::lonnet::declutter($hash{'map_id_'.$1}).
400: '___'.$2.'___'.&Apache::lonnet::declutter($hash{'src_'.$1.'.'.$2});
1.26 harris41 401: foreach (split(/\&/,$hash{$_})) {
1.19 www 402: my ($typename,$value)=split(/\=/,$_);
403: my ($type,$name)=split(/\:/,$typename);
404: $parmhash{$prefix.'.'.&Apache::lonnet::unescape($name)}=
405: &Apache::lonnet::unescape($value);
406: $parmhash{$prefix.'.'.&Apache::lonnet::unescape($name).'.type'}=
407: &Apache::lonnet::unescape($type);
1.26 harris41 408: }
1.19 www 409: }
1.26 harris41 410: }
411: foreach (keys %hash) {
1.4 www 412: if ($_=~/^ids/) {
1.26 harris41 413: foreach (split(/\,/,$hash{$_})) {
1.13 www 414: my $resid=$_;
1.4 www 415: my $uri=$hash{'src_'.$resid};
1.22 www 416: $uri=~s/^\/adm\/wrapper//;
1.55 www 417: $uri=&Apache::lonnet::declutter($uri);
1.4 www 418: my @uriparts=split(/\//,$uri);
419: my $urifile=$uriparts[$#uriparts];
420: $#uriparts--;
421: my $uripath=join('/',@uriparts);
1.23 www 422: if ($uripath) {
1.13 www 423: my $uricond='0';
1.4 www 424: if (defined($hash{'conditions_'.$resid})) {
1.13 www 425: $uricond=$captured{$hash{'conditions_'.$resid}};
1.4 www 426: }
1.5 www 427: if (defined($acchash{'acc.res.'.$short.'.'.$uripath})) {
1.13 www 428: if ($acchash{'acc.res.'.$short.'.'.$uripath}=~
1.56 albertel 429: /(\&\Q$urifile\E\:[^\&]*)/) {
1.13 www 430: my $replace=$1;
1.27 www 431: my $regexp=$replace;
432: $regexp=~s/\|/\\\|/g;
1.13 www 433: $acchash{'acc.res.'.$short.'.'.$uripath}
1.27 www 434: =~s/$regexp/$replace\|$uricond/;
1.13 www 435: } else {
436: $acchash{'acc.res.'.$short.'.'.$uripath}.=
437: $urifile.':'.$uricond.'&';
438: }
1.4 www 439: } else {
1.13 www 440: $acchash{'acc.res.'.$short.'.'.$uripath}=
441: '&'.$urifile.':'.$uricond.'&';
1.23 www 442: }
443: }
1.26 harris41 444: }
1.13 www 445: }
1.26 harris41 446: }
1.24 www 447: $acchash{'acc.res.'.$short.'.'}='&:0&';
1.8 www 448: my $courseuri=$uri;
449: $courseuri=~s/^\/res\///;
1.19 www 450: &Apache::lonnet::delenv('(acc\.|httpref\.)');
1.4 www 451: &Apache::lonnet::appenv(%acchash,
1.9 www 452: "request.course.id" => $short,
1.8 www 453: "request.course.fn" => $fn,
454: "request.course.uri" => $courseuri);
1.4 www 455: }
456:
1.29 www 457: # ------------------------------------- Selectively delete from randompick maps
458:
459: sub pickrandom {
1.31 www 460: my $randomoutentry='';
1.29 www 461: foreach my $rid (keys %randompick) {
462: my $rndpick=$randompick{$rid};
463: my $mpc=$hash{'map_pc_'.$hash{'src_'.$rid}};
464: # ------------------------------------------- put existing resources into array
465: my @currentrids=();
1.50 albertel 466: foreach (sort(keys(%hash))) {
1.29 www 467: if ($_=~/^src_($mpc\.\d+)/) {
468: if ($hash{'src_'.$1}) { push @currentrids, $1; }
469: }
470: }
1.50 albertel 471: # rids are number.number and we want to numercially sort on
472: # the second number
473: @currentrids=sort {
474: my (undef,$aid)=split(/\./,$a);
475: my (undef,$bid)=split(/\./,$b);
476: $aid <=> $bid;
477: } @currentrids;
1.29 www 478: next if ($#currentrids<$rndpick);
479: # -------------------------------- randomly eliminate the ones that should stay
1.50 albertel 480: my (undef,$id)=split(/\./,$rid);
1.51 www 481: if ($randompickseed{$rid}) { $id=$randompickseed{$rid}; }
1.50 albertel 482: my $rndseed=&Apache::lonnet::rndseed($id); # use id instead of symb
1.58 albertel 483: &Apache::lonnet::setup_random_from_rndseed($rndseed);
1.50 albertel 484: my @whichids=&Math::Random::random_permuted_index($#currentrids+1);
485: for (my $i=1;$i<=$rndpick;$i++) { $currentrids[$whichids[$i]]=''; }
486: #&Apache::lonnet::logthis("$id,$rndseed,".join(':',@whichids));
1.29 www 487: # -------------------------------------------------------- delete the leftovers
488: for (my $k=0; $k<=$#currentrids; $k++) {
489: if ($currentrids[$k]) {
490: $hash{'randomout_'.$currentrids[$k]}=1;
1.32 www 491: my ($mapid,$resid)=split(/\./,$currentrids[$k]);
492: $randomoutentry.='&'.
493: &Apache::lonnet::symbclean(
494: &Apache::lonnet::declutter($hash{'map_id_'.$mapid}).
495: '___'.$resid.'___'.
496: &Apache::lonnet::declutter($hash{'src_'.$currentrids[$k]})
497: ).'&';
1.29 www 498: }
499: }
1.31 www 500: }
501: if ($randomoutentry) {
502: &Apache::lonnet::appenv('acc.randomout' => $randomoutentry);
1.29 www 503: }
504: }
505:
1.1 www 506: # ---------------------------------------------------- Read map and all submaps
507:
508: sub readmap {
1.9 www 509: my $short=shift;
510: $short=~s/^\///;
511: my %cenv=&Apache::lonnet::coursedescription($short);
512: my $fn=$cenv{'fn'};
513: my $uri;
514: $short=~s/\//\_/g;
515: unless ($uri=$cenv{'url'}) {
516: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
517: "Could not load course $short.</font>");
518: return 'No course data available.';
519: }
1.3 www 520: @cond=('true:normal');
1.11 www 521: unlink($fn.'.db');
522: unlink($fn.'_symb.db');
523: unlink($fn.'.state');
1.19 www 524: unlink($fn.'parms.db');
1.29 www 525: undef %randompick;
1.21 www 526: $retfurl='';
1.36 albertel 527: if ((tie(%hash,'GDBM_File',"$fn.db",&GDBM_WRCREAT(),0640)) &&
528: (tie(%parmhash,'GDBM_File',$fn.'_parms.db',&GDBM_WRCREAT(),0640))) {
1.4 www 529: %hash=();
1.19 www 530: %parmhash=();
1.4 www 531: $errtext='';
532: $pc=0;
1.62 www 533: &processversionfile(%cenv);
1.38 www 534: my $furi=&Apache::lonnet::clutter($uri);
1.61 www 535: $hash{'src_0.0'}=&versiontrack($furi);
1.30 www 536: $hash{'title_0.0'}=&Apache::lonnet::metadata($uri,'title');
537: $hash{'ids_'.$furi}='0.0';
538: $hash{'is_map_0.0'}=1;
1.4 www 539: loadmap($uri);
540: if (defined($hash{'map_start_'.$uri})) {
541: &traceroute('0',$hash{'map_start_'.$uri},'&');
542: &accinit($uri,$short,$fn);
1.29 www 543: &pickrandom();
1.45 www 544: }
1.62 www 545: # ------------------------------------------------------- Put versions into src
1.61 www 546: foreach (keys %hash) {
547: if ($_=~/^src\_/) {
548: $hash{$_}=&putinversion($hash{$_});
549: }
550: }
1.19 www 551: unless ((untie(%hash)) && (untie(%parmhash))) {
1.4 www 552: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
553: "Could not untie coursemap $fn for $uri.</font>");
1.1 www 554: }
1.4 www 555: {
556: my $cfh;
557: if ($cfh=Apache::File->new(">$fn.state")) {
558: print $cfh join("\n",@cond);
559: } else {
1.6 www 560: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
1.4 www 561: "Could not write statemap $fn for $uri.</font>");
562: }
563: }
564: } else {
1.6 www 565: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
1.4 www 566: "Could not tie coursemap $fn for $uri.</font>");
567: }
1.12 www 568: &Apache::lonmsg::author_res_msg($ENV{'request.course.uri'},$errtext);
1.46 www 569: # ------------------------------------------------- Check for critical messages
570:
571: my @what=&Apache::lonnet::dump('critical',$ENV{'user.domain'},
572: $ENV{'user.name'});
573: if ($what[0]) {
574: if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
575: $retfurl='/adm/email?critical=display';
576: }
577: }
1.21 www 578: return ($retfurl,$errtext);
1.1 www 579: }
1.15 www 580:
581: # ------------------------------------------------------- Evaluate state string
582:
583: sub evalstate {
1.21 www 584:
1.15 www 585: my $fn=$ENV{'request.course.fn'}.'.state';
586: my $state='2';
587: if (-e $fn) {
588: my @conditions=();
589: {
590: my $fh=Apache::File->new($fn);
591: @conditions=<$fh>;
592: }
1.21 www 593: my $safeeval = new Safe;
594: my $safehole = new Safe::Hole;
1.15 www 595: $safeeval->permit("entereval");
596: $safeeval->permit(":base_math");
597: $safeeval->deny(":base_io");
1.21 www 598: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
1.26 harris41 599: foreach (@conditions) {
1.15 www 600: my $line=$_;
601: chomp($line);
602: my ($condition,$weight)=split(/\:/,$_);
603: if ($safeeval->reval($condition)) {
604: if ($weight eq 'force') {
605: $state.='3';
606: } else {
607: $state.='2';
608: }
609: } else {
610: if ($weight eq 'stop') {
611: $state.='0';
612: } else {
613: $state.='1';
614: }
615: }
1.26 harris41 616: }
1.15 www 617: }
618: &Apache::lonnet::appenv('user.state.'.$ENV{'request.course.id'} => $state);
619: return $state;
620: }
621:
1.1 www 622: 1;
623: __END__
624:
1.26 harris41 625: =head1 NAME
626:
627: Apache::lonuserstate - Construct and maintain state and binary representation
628: of course for user
629:
630: =head1 SYNOPSIS
631:
632: Invoked by lonroles.pm.
633:
634: &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
635:
636: =head1 INTRODUCTION
637:
638: This module constructs and maintains state and binary representation
639: of course for user.
640:
641: This is part of the LearningOnline Network with CAPA project
642: described at http://www.lon-capa.org.
643:
644: =head1 HANDLER SUBROUTINE
645:
646: There is no handler subroutine.
647:
648: =head1 OTHER SUBROUTINES
649:
650: =over 4
651:
652: =item *
653:
654: loadmap() : Loads map from disk
655:
656: =item *
657:
658: simplify() : Simplify expression
659:
660: =item *
661:
662: traceroute() : Build condition hash
663:
664: =item *
665:
666: accinit() : Cascading conditions, quick access, parameters
1.1 www 667:
1.26 harris41 668: =item *
1.1 www 669:
1.26 harris41 670: readmap() : Read map and all submaps
1.1 www 671:
1.26 harris41 672: =item *
1.1 www 673:
1.26 harris41 674: evalstate() : Evaluate state string
1.1 www 675:
1.26 harris41 676: =back
1.1 www 677:
1.26 harris41 678: =cut
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