Annotation of rat/lonuserstate.pm, revision 1.149.2.5.2.4
1.1 www 1: # The LearningOnline Network with CAPA
2: # Construct and maintain state and binary representation of course for user
3: #
1.149.2.5.2.4! (raeburn 4:: # $Id: lonuserstate.pm,v 1.149.2.5.2.3 2022/10/05 22:54:00 raeburn 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;
1.114 www 36: use Apache::lonlocal;
1.26 harris41 37: use Apache::loncommon();
1.1 www 38: use GDBM_File;
1.12 www 39: use Apache::lonmsg;
1.15 www 40: use Safe;
1.21 www 41: use Safe::Hole;
1.15 www 42: use Opcode;
1.73 www 43: use Apache::lonenc;
1.96 albertel 44: use Fcntl qw(:flock);
1.149.2.5.2.1 (raeburn 45:: use LONCAPA qw(:DEFAULT :match);
1.138 foxr 46: use File::Basename;
47:
1.114 www 48:
1.15 www 49:
1.1 www 50: # ---------------------------------------------------- Globals for this package
51:
1.138 foxr 52: my $pc; # Package counter is this what 'Guts' calls the map counter?
1.1 www 53: my %hash; # The big tied hash
1.19 www 54: my %parmhash;# The hash with the parameters
1.1 www 55: my @cond; # Array with all of the conditions
56: my $errtext; # variable with all errors
1.116 www 57: my $retfrid; # variable with the very first RID in the course
58: my $retfurl; # first URL
1.29 www 59: my %randompick; # randomly picked resources
1.51 www 60: my %randompickseed; # optional seed for randomly picking resources
1.124 albertel 61: my %randomorder; # maps to order contents randomly
1.146 raeburn 62: my %randomizationcode; # code used to grade folder for bubblesheet exam
1.73 www 63: my %encurl; # URLs in this folder are supposed to be encrypted
64: my %hiddenurl; # this URL (or complete folder) is supposed to be hidden
1.149.2.5.2.1 (raeburn 65:: my %deeplinkout; # this URL (or complete folder) unavailable in deep-link session
1.149.2.5.2.4! (raeburn 66:: my %deeplinkonlyprot; # Link protection items used for deep-link only resources.
1.149.2.2 raeburn 67: my %rescount; # count of unhidden items in each map
68: my %mapcount; # count of unhidden maps in each map
1.61 www 69:
70: # ----------------------------------- Remove version from URL and store in hash
71:
1.134 www 72: sub versionerror {
73: my ($uri,$usedversion,$unusedversion)=@_;
74: return '<br />'.&mt('Version discrepancy: resource [_1] included in both version [_2] and version [_3]. Using version [_2].',
75: $uri,$usedversion,$unusedversion).'<br />';
76: }
77:
1.139 foxr 78: # Removes the version number from a URI and returns the resulting
79: # URI (e.g. mumbly.version.stuff => mumbly.stuff).
80: #
81: # If the URI has not been seen with a versio before the
82: # hash{'version_'.resultingURI} is set to the version number.
83: # If the URI has been seen and the version does not match and error
84: # is added to the error string.
85: #
86: # Parameters:
87: # URI potentially with a version.
88: # Returns:
89: # URI with the version cut out.
90: # See above for side effects.
91: #
92:
1.61 www 93: sub versiontrack {
94: my $uri=shift;
95: if ($uri=~/\.(\d+)\.\w+$/) {
96: my $version=$1;
97: $uri=~s/\.\d+\.(\w+)$/\.$1/;
1.62 www 98: unless ($hash{'version_'.$uri}) {
99: $hash{'version_'.$uri}=$version;
1.134 www 100: } elsif ($version!=$hash{'version_'.$uri}) {
101: $errtext.=&versionerror($uri,$hash{'version_'.$uri},$version);
102: }
1.61 www 103: }
104: return $uri;
105: }
106:
107: # -------------------------------------------------------------- Put in version
108:
109: sub putinversion {
110: my $uri=shift;
1.93 www 111: my $key=$env{'request.course.id'}.'_'.&Apache::lonnet::clutter($uri);
1.61 www 112: if ($hash{'version_'.$uri}) {
113: my $version=$hash{'version_'.$uri};
1.65 www 114: if ($version eq 'mostrecent') { return $uri; }
1.66 www 115: if ($version eq &Apache::lonnet::getversion(
116: &Apache::lonnet::filelocation('',$uri)))
117: { return $uri; }
1.61 www 118: $uri=~s/\.(\w+)$/\.$version\.$1/;
119: }
1.93 www 120: &Apache::lonnet::do_cache_new('courseresversion',$key,&Apache::lonnet::declutter($uri),600);
1.61 www 121: return $uri;
122: }
123:
124: # ----------------------------------------- Processing versions file for course
125:
126: sub processversionfile {
1.64 www 127: my %cenv=@_;
1.61 www 128: my %versions=&Apache::lonnet::dump('resourceversions',
129: $cenv{'domain'},
130: $cenv{'num'});
1.106 albertel 131: foreach my $ver (keys(%versions)) {
132: if ($ver=~/^error\:/) { return; }
133: $hash{'version_'.$ver}=$versions{$ver};
1.61 www 134: }
135: }
1.45 www 136:
1.138 foxr 137: # --------------------------------------------------------- Loads from disk
1.1 www 138:
1.140 foxr 139:
140: #
141: # Loads a map file.
142: # Note that this may implicitly recurse via parse_resource if one of the resources
143: # is itself composed.
144: #
145: # Parameters:
146: # uri - URI of the map file.
147: # parent_rid - Resource id in the map of the parent resource (0.0 for the top level map)
1.146 raeburn 148: # courseid - Course id for the course for which the map is being loaded
1.140 foxr 149: #
1.1 www 150: sub loadmap {
1.146 raeburn 151: my ($uri,$parent_rid,$courseid)=@_;
1.138 foxr 152:
153: # Is the map already included?
154:
1.114 www 155: if ($hash{'map_pc_'.$uri}) {
1.120 albertel 156: $errtext.='<p class="LC_error">'.
157: &mt('Multiple use of sequence/page [_1]! The course will not function properly.','<tt>'.$uri.'</tt>').
158: '</p>';
1.114 www 159: return;
160: }
1.138 foxr 161: # Register the resource in it's map_pc_ [for the URL]
162: # map_id.nnn is the nesting level -> to the URI.
163:
1.1 www 164: $pc++;
165: my $lpc=$pc;
166: $hash{'map_pc_'.$uri}=$lpc;
167: $hash{'map_id_'.$lpc}=$uri;
1.138 foxr 168:
169: # If the parent is of the form n.m hang this map underneath it in the
170: # map hierarchy.
171:
1.136 raeburn 172: if ($parent_rid =~ /^(\d+)\.\d+$/) {
173: my $parent_pc = $1;
174: if (defined($hash{'map_hierarchy_'.$parent_pc})) {
175: $hash{'map_hierarchy_'.$lpc}=$hash{'map_hierarchy_'.$parent_pc}.','.
176: $parent_pc;
177: } else {
178: $hash{'map_hierarchy_'.$lpc}=$parent_pc;
179: }
180: }
1.1 www 181:
1.138 foxr 182: # Determine and check filename of the sequence we need to read:
183:
1.62 www 184: my $fn=&Apache::lonnet::filelocation('',&putinversion($uri));
1.37 www 185:
186: my $ispage=($fn=~/\.page$/);
1.1 www 187:
1.138 foxr 188: # We can only nest sequences or pages. Anything else is an illegal nest.
189:
190: unless (($fn=~/\.sequence$/) || $ispage) {
1.147 raeburn 191: $errtext.='<br />'.&mt('Invalid map: [_1]',"<tt>$fn</tt>");
1.98 albertel 192: return;
1.1 www 193: }
194:
1.138 foxr 195: # Read the XML that constitutes the file.
196:
1.37 www 197: my $instr=&Apache::lonnet::getfile($fn);
198:
1.124 albertel 199: if ($instr eq -1) {
1.147 raeburn 200: $errtext.= '<br />'
201: .&mt('Map not loaded: The file [_1] does not exist.',
202: "<tt>$fn</tt>");
1.149.2.5.2.3 (raeburn 203:: $hash{'map_type_'.$lpc}='none';
204:: if (&is_advanced($courseid)) {
205:: $errtext .= &error_detail($parent_rid,$courseid,$ispage,$uri);
206:: }
1.124 albertel 207: return;
208: }
1.22 www 209:
1.138 foxr 210: # Successfully got file, parse it
211:
212: # parse for parameter processing.
213: # Note that these are <param... / > tags
214: # so we only care about 'S' (tag start) nodes.
215:
1.1 www 216:
1.124 albertel 217: my $parser = HTML::TokeParser->new(\$instr);
218: $parser->attr_encoded(1);
1.138 foxr 219:
1.124 albertel 220: # first get all parameters
1.138 foxr 221:
222:
1.124 albertel 223: while (my $token = $parser->get_token) {
224: next if ($token->[0] ne 'S');
225: if ($token->[1] eq 'param') {
226: &parse_param($token,$lpc);
227: }
228: }
1.138 foxr 229:
230: # Get set to take another pass through the XML:
231: # for resources and links.
232:
1.124 albertel 233: $parser = HTML::TokeParser->new(\$instr);
234: $parser->attr_encoded(1);
1.1 www 235:
1.124 albertel 236: my $linkpc=0;
1.1 www 237:
1.124 albertel 238: $fn=~/\.(\w+)$/;
1.1 www 239:
1.124 albertel 240: $hash{'map_type_'.$lpc}=$1;
1.1 www 241:
1.124 albertel 242: my $randomize = ($randomorder{$parent_rid} =~ /^yes$/i);
1.1 www 243:
1.138 foxr 244: # Parse the resources, link and condition tags.
245: # Note that if randomorder or random select is chosen the links and
246: # conditions are meaningless but are determined by the randomization.
247: # This is handled in the next chunk of code.
248:
1.124 albertel 249: my @map_ids;
1.146 raeburn 250: my $codechecked;
1.149.2.2 raeburn 251: $rescount{$lpc} = 0;
252: $mapcount{$lpc} = 0;
1.124 albertel 253: while (my $token = $parser->get_token) {
254: next if ($token->[0] ne 'S');
1.138 foxr 255:
256: # Resource
257:
1.124 albertel 258: if ($token->[1] eq 'resource') {
1.146 raeburn 259: my $resource_id = &parse_resource($token,$lpc,$ispage,$uri,$courseid);
1.138 foxr 260: if (defined $resource_id) {
1.146 raeburn 261: push(@map_ids, $resource_id);
1.149.2.2 raeburn 262: if ($hash{'src_'.$lpc.'.'.$resource_id}) {
263: $rescount{$lpc} ++;
264: if (($hash{'src_'.$lpc.'.'.$resource_id}=~/\.sequence$/) ||
265: ($hash{'src_'.$lpc.'.'.$resource_id}=~/\.page$/)) {
266: $mapcount{$lpc} ++;
267: }
268: }
1.146 raeburn 269: unless ($codechecked) {
270: my $startsymb =
271: &Apache::lonnet::encode_symb($hash{'map_id_'.$lpc},$resource_id,
272: $hash{'src_'."$lpc.$resource_id"});
273: my $code =
274: &Apache::lonnet::EXT('resource.0.examcode',$startsymb,undef,undef,
275: undef,undef,$courseid);
276: if ($code) {
277: $randomizationcode{$parent_rid} = $code;
278: }
279: $codechecked = 1;
280: }
1.138 foxr 281: }
282:
283: # Link
284:
1.124 albertel 285: } elsif ($token->[1] eq 'link' && !$randomize) {
286: &make_link(++$linkpc,$lpc,$token->[2]->{'to'},
287: $token->[2]->{'from'},
1.139 foxr 288: $token->[2]->{'condition'}); # note ..condition may be undefined.
1.138 foxr 289:
290: # condition
291:
1.124 albertel 292: } elsif ($token->[1] eq 'condition' && !$randomize) {
293: &parse_condition($token,$lpc);
294: }
295: }
1.146 raeburn 296: undef($codechecked);
1.1 www 297:
1.138 foxr 298: # Handle randomization and random selection
299:
1.124 albertel 300: if ($randomize) {
1.149.2.4 raeburn 301: unless (&is_advanced($courseid)) {
1.148 raeburn 302: # Order of resources is not randomized if user has and advanced role in the course.
1.124 albertel 303: my $seed;
1.139 foxr 304:
1.148 raeburn 305: # If the map's random seed parameter has been specified
306: # it is used as the basis for computing the seed ...
1.139 foxr 307:
1.124 albertel 308: if (defined($randompickseed{$parent_rid})) {
309: $seed = $randompickseed{$parent_rid};
310: } else {
1.139 foxr 311:
312: # Otherwise the parent's fully encoded symb is used.
313:
1.124 albertel 314: my ($mapid,$resid)=split(/\./,$parent_rid);
315: my $symb=
316: &Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},
317: $resid,$hash{'src_'.$parent_rid});
1.85 albertel 318:
1.124 albertel 319: $seed = $symb;
320: }
1.138 foxr 321:
1.139 foxr 322: # TODO: Here for sure we need to pass along the username/domain
1.138 foxr 323: # so that we can impersonate users in lonprintout e.g.
324:
1.146 raeburn 325: my $setcode;
326: if (defined($randomizationcode{$parent_rid})) {
327: if ($env{'form.CODE'} eq '') {
328: $env{'form.CODE'} = $randomizationcode{$parent_rid};
329: $setcode = 1;
330: }
331: }
332:
1.124 albertel 333: my $rndseed=&Apache::lonnet::rndseed($seed);
334: &Apache::lonnet::setup_random_from_rndseed($rndseed);
1.140 foxr 335:
1.146 raeburn 336: if ($setcode) {
337: undef($env{'form.CODE'});
338: undef($setcode);
339: }
340:
1.140 foxr 341: # Take the set of map ids we have decoded and permute them to a
342: # random order based on the seed set above. All of this is
343: # processing the randomorder parameter if it is set, not
344: # randompick.
345:
1.148 raeburn 346: @map_ids=&Math::Random::random_permutation(@map_ids);
1.124 albertel 347: }
1.139 foxr 348:
1.124 albertel 349: my $from = shift(@map_ids);
350: my $from_rid = $lpc.'.'.$from;
351: $hash{'map_start_'.$uri} = $from_rid;
352: $hash{'type_'.$from_rid}='start';
353:
1.140 foxr 354: # Create links to reflect the random re-ordering done above.
355: # In the code to process the map XML, we did not process links or conditions
356: # if randomorder was set. This means that for an instructor to choose
1.139 foxr 357:
1.124 albertel 358: while (my $to = shift(@map_ids)) {
359: &make_link(++$linkpc,$lpc,$to,$from);
360: my $to_rid = $lpc.'.'.$to;
361: $hash{'type_'.$to_rid}='normal';
362: $from = $to;
363: $from_rid = $to_rid;
364: }
1.1 www 365:
1.124 albertel 366: $hash{'map_finish_'.$uri}= $from_rid;
367: $hash{'type_'.$from_rid}='finish';
1.1 www 368: }
1.121 albertel 369:
1.127 albertel 370: $parser = HTML::TokeParser->new(\$instr);
1.121 albertel 371: $parser->attr_encoded(1);
1.139 foxr 372:
1.149.2.2 raeburn 373: # last parse out the mapalias params. These provide mnemonic
1.140 foxr 374: # tags to resources that can be used in conditions
1.139 foxr 375:
1.121 albertel 376: while (my $token = $parser->get_token) {
377: next if ($token->[0] ne 'S');
378: if ($token->[1] eq 'param') {
379: &parse_mapalias_param($token,$lpc);
380: }
381: }
382: }
383:
1.149.2.4 raeburn 384: sub is_advanced {
385: my ($courseid) = @_;
386: my $advanced;
387: if ($env{'request.course.id'}) {
388: $advanced = (&Apache::lonnet::allowed('adv') eq 'F');
389: } else {
390: $env{'request.course.id'} = $courseid;
391: $advanced = (&Apache::lonnet::allowed('adv') eq 'F');
392: $env{'request.course.id'} = '';
393: }
394: return $advanced;
395: }
1.124 albertel 396:
1.149.2.5.2.3 (raeburn 397:: sub error_detail {
398:: my ($parent_rid,$courseid,$ispage,$uri) = @_;
399:: my $errinfo;
400:: if ($courseid) {
401:: my $courseurl = &Apache::lonnet::courseid_to_courseurl($courseid);
402:: if ($parent_rid =~ /^(\d+)\.(\d+)$/) {
403:: my ($parent_pc,$parent_id) = ($1,$2);
404:: my ($parent_type,$published,$uploaded,$canedit,$role,$switchserver,$audom,$auname,
405:: $editfile,$filerole,$fileswitch,$audomfile,$aunamefile);
406:: if (($parent_pc eq '0') && ($hash{'map_id_1'} =~ m{^/res/($match_domain)/($match_username)/.+\.(sequence|page)$})) {
407:: ($audomfile,$aunamefile) = ($1,$2);
408:: ($editfile,$filerole,$fileswitch) = &canedit_published($audomfile,$aunamefile);
409:: $errinfo = &mt('Top level published sequence file is missing.');
410:: } else {
411:: if ($parent_pc eq '1') {
412:: if ($hash{'map_id_1'} eq "/uploaded$courseurl/default.sequence") {
413:: $uploaded = 1;
414:: if (&Apache::lonnet::allowed('mdc',$courseid)) {
415:: $canedit = 1;
416:: }
417:: $errinfo = &mt('Map is referenced in the top level ([_1]Main Content[_2]) folder.',
418:: '<span class="LC_cusr_emph">','</span>');
419:: } elsif ($hash{'map_id_1'} =~ m{^/res/($match_domain)/($match_username)/.+\.(sequence|page)$}) {
420:: ($audom,$auname) = ($1,$2);
421:: ($canedit,$role,$switchserver) = &canedit_published($audom,$auname);
422:: $published = 1;
423:: $errinfo = &mt('Map is referenced in the top level published sequence file.');
424:: }
425:: } else {
426:: if ($hash{'map_id_'.$parent_pc} =~ m{^\Q/uploaded$courseurl/default_\E\d+\.(sequence|page)$}) {
427:: $uploaded = 1;
428:: if (&Apache::lonnet::allowed('mdc',$courseid)) {
429:: $canedit = 1;
430:: }
431:: } elsif ($hash{'map_id_'.$parent_pc} =~ m{^/res/($match_domain)/($match_username)/.+\.(sequence|page)$}) {
432:: ($audom,$auname) = ($1,$2);
433:: ($canedit,$role,$switchserver) = &canedit_published($audom,$auname);
434:: $published = 1;
435:: }
436:: if (exists($hash{'ids_'.$hash{'map_id_'.$parent_pc}})) {
437:: $parent_type = $hash{'map_type_'.$parent_pc};
438:: if ($published) {
439:: $errinfo = &mt("Map is referenced in the published $parent_type file: [_1].",
440:: '<span class="LC_cusr_emph">'.$hash{'map_id_'.$parent_pc}.'</span>');
441:: } else {
442:: my $title = $hash{'title_'.$hash{'ids_'.$hash{'map_id_'.$parent_pc}}};
443:: if ($title ne '') {
444:: my $mapdesc;
445:: if ($parent_type eq 'sequence') {
446:: $mapdesc = 'folder';
447:: } else {
448:: $mapdesc = 'composite page';
449:: }
450:: $errinfo = &mt("Map is referenced in the $mapdesc named: [_1].",
451:: '<span class="LC_cusr_emph">'.$title.'</span>');
452:: }
453:: my @containers = split(/,/,$hash{'map_hierarchy_'.$parent_pc});
454:: shift(@containers);
455:: my $folderpath;
456:: foreach my $id (@containers) {
457:: my $name;
458:: if ($id == 1) {
459:: $name = &mt('Main Content');
460:: } elsif ($hash{'title_'.$hash{'ids_'.$hash{'map_id_'.$id}}} ne '') {
461:: $name = $hash{'title_'.$hash{'ids_'.$hash{'map_id_'.$id}}};
462:: }
463:: if ($name ne '') {
464:: $folderpath .= $name.' » ';
465:: }
466:: }
467:: if ($title eq '') {
468:: $folderpath =~ s/\Q » \E$//;
469:: } else {
470:: $folderpath .= $title;
471:: }
472:: if ($folderpath) {
473:: $errinfo .= '<br />'.&mt('Hierarchy is: [_1]',
474:: '<span class="LC_cusr_emph">'.$folderpath.'</span>');
475:: }
476:: }
477:: }
478:: }
479:: if ($uri =~ m{^/res/($match_domain)/($match_username)/.+\.(sequence|page)$}) {
480:: ($audomfile,$aunamefile) = ($1,$2);
481:: ($editfile,$filerole,$fileswitch) = &canedit_published($audomfile,$aunamefile);
482:: }
483:: }
484:: if ($errinfo) {
485:: $errinfo = '<br />'.$errinfo.'<br />';
486:: }
487:: if ($editfile) {
488:: if ($errinfo ne '') {
489:: $errinfo .= '<br />';
490:: }
491:: if ($canedit) {
492:: $errinfo .= &mt('One way to rectify this problem is to create and publish the missing file');
493:: } else {
494:: $errinfo .= &mt('To rectify this problem, create and publish the missing file');
495:: }
496:: my $fileurl = $uri;
497:: $fileurl =~s{^/res/}{/priv/};
498:: if ($fileswitch) {
499:: my $rolename = &Apache::lonnet::plaintext($filerole);
500:: my $rolecode;
501:: if ($filerole eq 'au') {
502:: $rolecode = 'au./'.$audomfile.'/';
503:: } else {
504:: $rolecode = $filerole.'./'.$audomfile.'/'.$aunamefile;
505:: }
506:: $errinfo .= '.<br />'.&mt('You will need to [_1]switch server[_2].',
507:: '<a href="/adm/switchserver?otherserver='.$switchserver.'&role='.$rolecode.
508:: '&origurl='.&escape($fileurl).'">','</a>');
509:: } else {
510:: &js_escape(\$fileurl);
511:: $errinfo .= ': <a href="javascript:go('."'$fileurl'".');">'.&mt('Create the missing file').'</a>';
512:: }
513:: }
514:: if ($canedit) {
515:: if ($errinfo ne '') {
516:: $errinfo .= '<br />';
517:: }
518:: if ($published) {
519:: my $rolename = &Apache::lonnet::plaintext($role);
520:: my $rolecode;
521:: if ($role eq 'au') {
522:: $rolecode = 'au./'.$audom.'/';
523:: } else {
524:: $rolecode = $role.'./'.$audom.'/'.$auname;
525:: }
526:: if ($editfile) {
527:: $errinfo .= &mt('Another way is to edit the parent map to remove the reference to the missing file');
528:: } else {
529:: $errinfo .= &mt('To rectify this problem edit the parent map to remove the reference to the missing file');
530:: }
531:: my $mapurl = $hash{'map_id_'.$parent_pc};
532:: $mapurl =~s{^/res/}{/priv/};
533:: if ($switchserver) {
534:: $errinfo .= '.<br />'.
535:: &mt('You will need to [_1]switch server[_2].',
536:: '<a href="/adm/switchserver?otherserver='.$switchserver.'&role='.$rolecode.
537:: '&origurl='.&escape($mapurl).'">','</a>');
538:: } else {
539:: &js_escape(\$mapurl);
540:: $errinfo .= ': <a href="javascript:go('."'$mapurl'".');">'.&mt('Edit the map').'</a>';
541:: }
542:: } elsif ($uploaded && $courseid) {
543:: my ($dest,$linktext);
544:: my $crstype = &Apache::loncommon::course_type($courseid);
545:: if ($parent_pc eq '1') {
546:: $dest = '/adm/coursedocs?folderpath='.&escape('default&Main%20Content:::::');
547:: $linktext = &mt('Edit Folder');
548:: } elsif ($hash{'ids_'.$hash{'map_id_'.$parent_pc}} =~ /^(\d+)\.(\d+)$/) {
549:: my ($editmap,$editidx) = ($1,$2);
550:: my $symb = &Apache::lonnet::encode_symb($hash{'map_id_'.$editmap},
551:: $editidx,$hash{'map_id_'.$parent_pc});
552:: $dest = '/adm/coursedocs?command=directnav&symb='.&escape($symb);
553:: if ($parent_type eq 'sequence') {
554:: $linktext = &mt('Edit Folder');
555:: } else {
556:: $linktext = &mt('Edit Composite Page');
557:: }
558:: } else {
559:: $dest = '/adm/coursedocs?folderpath='.&escape('default&Main%20Content:::::');
560:: $linktext = &mt("Edit $crstype");
561:: }
562:: if ($editfile) {
563:: $errinfo .= &mt("Another way is to use the $crstype Editor to delete the reference to the missing file");
564:: } else {
565:: $errinfo .= &mt("To rectify this problem use the $crstype Editor to delete the reference to the missing file");
566:: }
567:: $errinfo .= ': <a href="javascript:go('."'$dest'".');">'.$linktext.'</a>';
568:: }
569:: $errinfo .= '<br />';
570:: }
571:: }
572:: }
573:: return $errinfo;
574:: }
575::
576:: sub canedit_published {
577:: my ($audom,$auname) = @_;
578:: my ($canedit,$role,$switchserver);
579:: my $now = time;
580:: if (($auname eq $env{'user.name'}) && ($audom eq $env{'user.domain'})) {
581:: if (exists($env{"user.role.au./$audom/"})) {
582:: my ($start,$end) = split(/\./,$env{"user.role.au./$audom/"});
583:: unless (($end && $end < $now) || ($start && $start > $now)) {
584:: $canedit = 1;
585:: $role = 'au';
586:: }
587:: }
588:: }
589:: unless ($canedit) {
590:: foreach my $possrole ('ca','aa') {
591:: if (exists($env{"user.role.$possrole./$audom/$auname"})) {
592:: my ($end,$start) = split(/\./,$env{"user.role.$possrole./$audom/$auname"});
593:: unless (($end && $end < time) || ($start && $start > time)) {
594:: $canedit = 1;
595:: $role = $possrole;
596:: last;
597:: }
598:: }
599:: }
600:: }
601:: if ($canedit) {
602:: my $auhome = &Apache::lonnet::homeserver($auname,$audom);
603:: my @ids=&Apache::lonnet::current_machine_ids();
604:: if (($auhome ne 'no_host') && (!grep(/^\Q$auhome\E$/,@ids))) {
605:: $switchserver = $auhome;
606:: }
607:: }
608:: return ($canedit,$role,$switchserver);
609:: }
610::
1.124 albertel 611: # -------------------------------------------------------------------- Resource
1.138 foxr 612: #
613: # Parses a resource tag to produce the value to push into the
614: # map_ids array.
615: #
616: #
617: # Information about the actual type of resource is provided by the file extension
618: # of the uri (e.g. .problem, .sequence etc. etc.).
619: #
620: # Parameters:
621: # $token - A token from HTML::TokeParser
622: # This is an array that describes the most recently parsed HTML item.
623: # $lpc - Map nesting level (?)
624: # $ispage - True if this resource is encapsulated in a .page (assembled resourcde).
625: # $uri - URI of the enclosing resource.
1.146 raeburn 626: # $courseid - Course id of the course containing the resource being parsed.
1.138 foxr 627: # Returns:
1.139 foxr 628: # Value of the id attribute of the tag.
1.138 foxr 629: #
630: # Note:
631: # The token is an array that contains the following elements:
632: # [0] => 'S' indicating this is a start token
633: # [1] => 'resource' indicating this tag is a <resource> tag.
634: # [2] => Hash of attribute =>value pairs.
635: # [3] => @(keys [2]).
636: # [4] => unused.
637: #
638: # The attributes of the resourcde tag include:
639: #
640: # id - The resource id.
641: # src - The URI of the resource.
642: # type - The resource type (e.g. start and finish).
643: # title - The resource title.
644:
645:
1.124 albertel 646: sub parse_resource {
1.146 raeburn 647: my ($token,$lpc,$ispage,$uri,$courseid) = @_;
1.138 foxr 648:
1.139 foxr 649: # I refuse to countenance code like this that has
1.138 foxr 650: # such a dirty side effect (and forcing this sub to be called within a loop).
651: #
652: # if ($token->[2]->{'type'} eq 'zombie') { next; }
1.139 foxr 653: #
654: # The original code both returns _and_ skips to the next pass of the >caller's<
655: # loop, that's just dirty.
656: #
1.138 foxr 657:
658: # Zombie resources don't produce anything useful.
659:
660: if ($token->[2]->{'type'} eq 'zombie') {
661: return undef;
662: }
663:
1.139 foxr 664: my $rid=$lpc.'.'.$token->[2]->{'id'}; # Resource id in hash is levelcounter.id-in-xml.
665:
666: # Save the hash element type and title:
1.124 albertel 667:
668: $hash{'kind_'.$rid}='res';
669: $hash{'title_'.$rid}=$token->[2]->{'title'};
1.139 foxr 670:
671: # Get the version free URI for the resource.
672: # If a 'version' attribute was supplied, and this resource's version
673: # information has not yet been stored, store it.
674: #
675:
1.124 albertel 676: my $turi=&versiontrack($token->[2]->{'src'});
677: if ($token->[2]->{'version'}) {
678: unless ($hash{'version_'.$turi}) {
679: $hash{'version_'.$turi}=$1;
680: }
681: }
1.139 foxr 682: # Pull out the title and do entity substitution on &colon
683: # Q: Why no other entity substitutions?
684:
1.124 albertel 685: my $title=$token->[2]->{'title'};
686: $title=~s/\&colon\;/\:/gs;
1.139 foxr 687:
688:
689:
690: # I think the point of all this code is to construct a final
691: # URI that apache and its rewrite rules can use to
692: # fetch the resource. Thi s sonly necessary if the resource
693: # is not a page. If the resource is a page then it must be
694: # assembled (at fetch time?).
695:
1.149.2.3 raeburn 696: if ($ispage) {
697: if ($token->[2]->{'external'} eq 'true') { # external
698: $turi=~s{^http\://}{/ext/};
699: }
700: } else {
1.124 albertel 701: $turi=~/\.(\w+)$/;
702: my $embstyle=&Apache::loncommon::fileembstyle($1);
703: if ($token->[2]->{'external'} eq 'true') { # external
1.130 raeburn 704: $turi=~s/^https?\:\/\//\/adm\/wrapper\/ext\//;
1.124 albertel 705: } elsif ($turi=~/^\/*uploaded\//) { # uploaded
706: if (($embstyle eq 'img')
707: || ($embstyle eq 'emb')
708: || ($embstyle eq 'wrp')) {
709: $turi='/adm/wrapper'.$turi;
710: } elsif ($embstyle eq 'ssi') {
711: #do nothing with these
712: } elsif ($turi!~/\.(sequence|page)$/) {
713: $turi='/adm/coursedocs/showdoc'.$turi;
714: }
1.149.2.5.2.1 (raeburn 715:: } elsif ($turi=~ m{^/adm/$match_domain/$match_courseid/\d+/ext\.tool$}) {
716:: $turi='/adm/wrapper'.$turi;
1.124 albertel 717: } elsif ($turi=~/\S/) { # normal non-empty internal resource
718: my $mapdir=$uri;
719: $mapdir=~s/[^\/]+$//;
720: $turi=&Apache::lonnet::hreflocation($mapdir,$turi);
721: if (($embstyle eq 'img')
722: || ($embstyle eq 'emb')
723: || ($embstyle eq 'wrp')) {
724: $turi='/adm/wrapper'.$turi;
725: }
726: }
727: }
1.139 foxr 728: # Store reverse lookup, remove query string resource 'ids'_uri => resource id.
729: # If the URI appears more than one time in the sequence, it's resourcde
730: # id's are constructed as a comma spearated list.
731:
1.124 albertel 732: my $idsuri=$turi;
733: $idsuri=~s/\?.+$//;
734: if (defined($hash{'ids_'.$idsuri})) {
735: $hash{'ids_'.$idsuri}.=','.$rid;
736: } else {
737: $hash{'ids_'.$idsuri}=''.$rid;
738: }
739:
1.139 foxr 740:
741:
1.135 raeburn 742: if ($turi=~/\/(syllabus|aboutme|navmaps|smppg|bulletinboard|viewclasslist)$/) {
1.124 albertel 743: $turi.='?register=1';
744: }
745:
1.139 foxr 746:
747: # resource id lookup: 'src'_resourc-di => URI decorated with a query
748: # parameter as above if necessary due to the resource type.
749:
1.124 albertel 750: $hash{'src_'.$rid}=$turi;
1.139 foxr 751:
752: # Mark the external-ness of the resource:
1.124 albertel 753:
754: if ($token->[2]->{'external'} eq 'true') {
755: $hash{'ext_'.$rid}='true:';
756: } else {
757: $hash{'ext_'.$rid}='false:';
758: }
1.139 foxr 759:
760: # If the resource is a start/finish resource set those
761: # entries in the has so that navigation knows where everything starts.
762: # TODO? If there is a malformed sequence that has no start or no finish
763: # resource, should this be detected and errors thrown? How would such a
764: # resource come into being other than being manually constructed by a person
765: # and then uploaded? Could that happen if an author decided a sequence was almost
766: # right edited it by hand and then reuploaded it to 'fix it' but accidently cut the
767: # start or finish resources?
768: #
769: # All resourcess also get a type_id => (start | finish | normal) hash entr.
770: #
1.124 albertel 771: if ($token->[2]->{'type'}) {
772: $hash{'type_'.$rid}=$token->[2]->{'type'};
773: if ($token->[2]->{'type'} eq 'start') {
774: $hash{'map_start_'.$uri}="$rid";
775: }
776: if ($token->[2]->{'type'} eq 'finish') {
777: $hash{'map_finish_'.$uri}="$rid";
778: }
779: } else {
780: $hash{'type_'.$rid}='normal';
781: }
1.139 foxr 782:
783: # Sequences end pages are constructed entities. They require that the
784: # map that defines _them_ be loaded as well into the hash...with this resourcde
785: # as the base of the nesting.
786: # Resources like that are also marked with is_map_id => 1 entries.
787: #
1.124 albertel 788:
789: if (($turi=~/\.sequence$/) ||
790: ($turi=~/\.page$/)) {
791: $hash{'is_map_'.$rid}=1;
1.149.2.4 raeburn 792: if ((!$hiddenurl{$rid}) || (&is_advanced($courseid))) {
793: &loadmap($turi,$rid,$courseid);
794: }
1.124 albertel 795: }
796: return $token->[2]->{'id'};
797: }
798:
1.139 foxr 799: #-------------------------------------------------------------------- link
800: # Links define how you are allowed to move from one resource to another.
801: # They are the transition edges in the directed graph that a map is.
802: # This sub takes informatino from a <link> tag and constructs the
803: # navigation bits and pieces of a map. There is no requirement that the
804: # resources that are linke are already defined, however clearly the map is
805: # badly broken if they are not _eventually_ defined.
806: #
807: # Note that links can be unconditional or conditional.
808: #
809: # Parameters:
810: # linkpc - The link counter for this level of map nesting (this is
811: # reset to zero by loadmap prior to starting to process
812: # links for map).
813: # lpc - The map level ocounter (how deeply nested this map is in
814: # the hierarchy of maps that are recursively read in.
815: # to - resource id (within the XML) of the target of the edge.
816: # from - resource id (within the XML) of the source of the edge.
817: # condition- id of condition associated with the edge (also within the XML).
818: #
819:
1.124 albertel 820: sub make_link {
821: my ($linkpc,$lpc,$to,$from,$condition) = @_;
822:
1.139 foxr 823: # Compute fully qualified ids for the link, the
824: # and from/to by prepending lpc.
825: #
826:
1.124 albertel 827: my $linkid=$lpc.'.'.$linkpc;
828: my $goesto=$lpc.'.'.$to;
829: my $comesfrom=$lpc.'.'.$from;
830: my $undercond=0;
831:
1.139 foxr 832:
833: # If there is a condition, qualify it with the level counter.
834:
1.124 albertel 835: if ($condition) {
836: $undercond=$lpc.'.'.$condition;
837: }
838:
1.139 foxr 839: # Links are represnted by:
840: # goesto_.fuullyqualifedlinkid => fully qualified to
841: # comesfrom.fullyqualifiedlinkid => fully qualified from
842: # undercond_.fullyqualifiedlinkid => fully qualified condition id.
843:
1.124 albertel 844: $hash{'goesto_'.$linkid}=$goesto;
845: $hash{'comesfrom_'.$linkid}=$comesfrom;
846: $hash{'undercond_'.$linkid}=$undercond;
847:
1.139 foxr 848: # In addition:
849: # to_.fully qualified from => comma separated list of
850: # link ids with that from.
851: # Similarly:
852: # from_.fully qualified to => comma separated list of link ids`
853: # with that to.
854: # That allows us given a resource id to know all edges that go to it
855: # and leave from it.
856: #
857:
1.124 albertel 858: if (defined($hash{'to_'.$comesfrom})) {
859: $hash{'to_'.$comesfrom}.=','.$linkid;
860: } else {
861: $hash{'to_'.$comesfrom}=''.$linkid;
862: }
863: if (defined($hash{'from_'.$goesto})) {
864: $hash{'from_'.$goesto}.=','.$linkid;
865: } else {
866: $hash{'from_'.$goesto}=''.$linkid;
867: }
868: }
869:
870: # ------------------------------------------------------------------- Condition
1.139 foxr 871: #
872: # Processes <condition> tags, storing sufficient information about them
873: # in the hash so that they can be evaluated and used to conditionalize
874: # what is presented to the student.
875: #
876: # these can have the following attributes
877: #
878: # id = A unique identifier of the condition within the map.
879: #
880: # value = Is a perl script-let that, when evaluated in safe space
881: # determines whether or not the condition is true.
882: # Normally this takes the form of a test on an Apache::lonnet::EXT call
883: # to find the value of variable associated with a resource in the
884: # map identified by a mapalias.
885: # Here's a fragment of XML code that illustrates this:
886: #
887: # <param to="5" value="mainproblem" name="parameter_0_mapalias" type="string" />
888: # <resource src="" id="1" type="start" title="Start" />
889: # <resource src="/res/msu/albertel/b_and_c/p1.problem" id="5" title="p1.problem" />
890: # <condition value="&EXT('user.resource.resource.0.tries','mainproblem')
891: # <2 " id="61" type="stop" />
892: # <link to="5" index="1" from="1" condition="61" />
893: #
894: # In this fragment:
895: # - The param tag establishes an alias to resource id 5 of 'mainproblem'.
896: # - The resource that is the start of the map is identified.
897: # - The resource tag identifies the resource associated with this tag
898: # and gives it the id 5.
899: # - The condition is true if the tries variable associated with mainproblem
900: # is less than 2 (that is the user has had more than 2 tries).
901: # The condition type is a stop condition which inhibits(?) the associated
902: # link if the condition is false.
903: # - The link to resource 5 from resource 1 is affected by this condition.
904: #
905: # type = Type of the condition. The type determines how the condition affects the
906: # link associated with it and is one of
907: # - 'force'
908: # - 'stop'
909: # anything else including not supplied..which treated as:
910: # - 'normal'.
911: # Presumably maps get created by the resource assembly tool and therefore
912: # illegal type values won't squirm their way into the XML.
913: #
914: # Side effects:
915: # - The kind_level-qualified-condition-id hash element is set to 'cond'.
916: # - The condition text is pushed into the cond array and its element number is
917: # set in the condid_level-qualified-condition-id element of the hash.
918: # - The condition type is colon appneded to the cond array element for this condition.
1.124 albertel 919: sub parse_condition {
920: my ($token,$lpc) = @_;
921: my $rid=$lpc.'.'.$token->[2]->{'id'};
922:
923: $hash{'kind_'.$rid}='cond';
924:
925: my $condition = $token->[2]->{'value'};
926: $condition =~ s/[\n\r]+/ /gs;
927: push(@cond, $condition);
928: $hash{'condid_'.$rid}=$#cond;
929: if ($token->[2]->{'type'}) {
930: $cond[$#cond].=':'.$token->[2]->{'type'};
931: } else {
932: $cond[$#cond].=':normal';
933: }
934: }
935:
936: # ------------------------------------------------------------------- Parameter
1.138 foxr 937: # Parse a <parameter> tag in the map.
938: # Parmameters:
939: # $token Token array for a start tag from HTML::TokeParser
940: # [0] = 'S'
941: # [1] = tagname ("param")
942: # [2] = Hash of {attribute} = values.
943: # [3] = Array of the keys in [2].
944: # [4] = unused.
945: # $lpc Current map nesting level.a
946: #
947: # Typical attributes:
948: # to=n - Number of the resource the parameter applies to.
949: # type=xx - Type of parameter value (e.g. string_yesno or int_pos).
1.149.2.2 raeburn 950: # name=xxx - Name of parameter (e.g. parameter_randompick or parameter_randomorder).
1.138 foxr 951: # value=xxx - value of the parameter.
1.124 albertel 952:
953: sub parse_param {
954: my ($token,$lpc) = @_;
1.138 foxr 955: my $referid=$lpc.'.'.$token->[2]->{'to'}; # Resource param applies to.
956: my $name=$token->[2]->{'name'}; # Name of parameter
1.124 albertel 957: my $part;
1.138 foxr 958:
959:
960: if ($name=~/^parameter_(.*)_/) {
1.124 albertel 961: $part=$1;
962: } else {
963: $part=0;
964: }
1.138 foxr 965:
966: # Peel the parameter_ off the parameter name.
967:
1.124 albertel 968: $name=~s/^.*_([^_]*)$/$1/;
1.138 foxr 969:
970: # The value is:
971: # type.part.name.value
972:
1.124 albertel 973: my $newparam=
974: &escape($token->[2]->{'type'}).':'.
975: &escape($part.'.'.$name).'='.
976: &escape($token->[2]->{'value'});
1.138 foxr 977:
978: # The hash key is param_resourceid.
979: # Multiple parameters for a single resource are & separated in the hash.
980:
981:
1.124 albertel 982: if (defined($hash{'param_'.$referid})) {
983: $hash{'param_'.$referid}.='&'.$newparam;
984: } else {
985: $hash{'param_'.$referid}=''.$newparam;
986: }
1.138 foxr 987: #
988: # These parameters have to do with randomly selecting
989: # resources, therefore a separate hash is also created to
990: # make it easy to locate them when actually computing the resource set later on
991: # See the code conditionalized by ($randomize) in loadmap().
992:
993: if ($token->[2]->{'name'}=~/^parameter_(0_)*randompick$/) { # Random selection turned on
1.124 albertel 994: $randompick{$referid}=$token->[2]->{'value'};
995: }
1.138 foxr 996: if ($token->[2]->{'name'}=~/^parameter_(0_)*randompickseed$/) { # Randomseed provided.
1.124 albertel 997: $randompickseed{$referid}=$token->[2]->{'value'};
998: }
1.138 foxr 999: if ($token->[2]->{'name'}=~/^parameter_(0_)*randomorder$/) { # Random order turned on.
1.124 albertel 1000: $randomorder{$referid}=$token->[2]->{'value'};
1001: }
1.138 foxr 1002:
1003: # These parameters have to do with how the URLs of resources are presented to
1004: # course members(?). encrypturl presents encypted url's while
1005: # hiddenresource hides the URL.
1006: #
1007:
1.124 albertel 1008: if ($token->[2]->{'name'}=~/^parameter_(0_)*encrypturl$/) {
1009: if ($token->[2]->{'value'}=~/^yes$/i) {
1010: $encurl{$referid}=1;
1011: }
1012: }
1013: if ($token->[2]->{'name'}=~/^parameter_(0_)*hiddenresource$/) {
1014: if ($token->[2]->{'value'}=~/^yes$/i) {
1015: $hiddenurl{$referid}=1;
1016: }
1017: }
1018: }
1.140 foxr 1019: #
1020: # Parse mapalias parameters.
1021: # these are tags of the form:
1022: # <param to="nn"
1023: # value="some-alias-for-resourceid-nn"
1024: # name="parameter_0_mapalias"
1025: # type="string" />
1026: # A map alias is a textual name for a resource:
1027: # - The to attribute identifies the resource (this gets level qualified below)
1028: # - The value attributes provides the alias string.
1029: # - name must be of the regexp form: /^parameter_(0_)*mapalias$/
1030: # - e.g. the string 'parameter_' followed by 0 or more "0_" strings
1031: # terminating with the string 'mapalias'.
1032: # Examples:
1033: # 'parameter_mapalias', 'parameter_0_mapalias', parameter_0_0_mapalias'
1034: # Invalid to ids are silently ignored.
1035: #
1036: # Parameters:
1037: # token - The token array fromthe HMTML::TokeParser
1038: # lpc - The current map level counter.
1039: #
1.121 albertel 1040: sub parse_mapalias_param {
1041: my ($token,$lpc) = @_;
1.140 foxr 1042:
1043: # Fully qualify the to value and ignore the alias if there is no
1044: # corresponding resource.
1045:
1.121 albertel 1046: my $referid=$lpc.'.'.$token->[2]->{'to'};
1047: return if (!exists($hash{'src_'.$referid}));
1048:
1.140 foxr 1049: # If this is a valid mapalias parameter,
1050: # Append the target id to the count_mapalias element for that
1051: # alias so that we can detect doubly defined aliases
1052: # e.g.:
1053: # <param to="1" value="george" name="parameter_0_mapalias" type="string" />
1054: # <param to="2" value="george" name="parameter_0_mapalias" type="string" />
1055: #
1056: # The example above is trivial but the case that's important has to do with
1057: # constructing a map that includes a nested map where the nested map may have
1058: # aliases that conflict with aliases established in the enclosing map.
1059: #
1060: # ...and create/update the hash mapalias entry to actually store the alias.
1061: #
1062:
1.121 albertel 1063: if ($token->[2]->{'name'}=~/^parameter_(0_)*mapalias$/) {
1.122 albertel 1064: &count_mapalias($token->[2]->{'value'},$referid);
1.121 albertel 1065: $hash{'mapalias_'.$token->[2]->{'value'}}=$referid;
1066: }
1.1 www 1067: }
1068:
1.3 www 1069: # --------------------------------------------------------- Simplify expression
1070:
1.140 foxr 1071:
1072: #
1073: # Someone should really comment this to describe what it does to what and why.
1074: #
1.3 www 1075: sub simplify {
1.85 albertel 1076: my $expression=shift;
1.101 albertel 1077: # (0&1) = 1
1.105 albertel 1078: $expression=~s/\(0\&([_\.\d]+)\)/$1/g;
1.3 www 1079: # (8)=8
1.105 albertel 1080: $expression=~s/\(([_\.\d]+)\)/$1/g;
1.3 www 1081: # 8&8=8
1.105 albertel 1082: $expression=~s/([^_\.\d])([_\.\d]+)\&\2([^_\.\d])/$1$2$3/g;
1.3 www 1083: # 8|8=8
1.141 raeburn 1084: $expression=~s/([^_\.\d])([_\.\d]+)(?:\|\2)+([^_\.\d])/$1$2$3/g;
1.3 www 1085: # (5&3)&4=5&3&4
1.105 albertel 1086: $expression=~s/\(([_\.\d]+)((?:\&[_\.\d]+)+)\)\&([_\.\d]+[^_\.\d])/$1$2\&$3/g;
1.3 www 1087: # (((5&3)|(4&6)))=((5&3)|(4&6))
1.105 albertel 1088: $expression=~
1089: s/\((\(\([_\.\d]+(?:\&[_\.\d]+)*\)(?:\|\([_\.\d]+(?:\&[_\.\d]+)*\))+\))\)/$1/g;
1.3 www 1090: # ((5&3)|(4&6))|(1&2)=(5&3)|(4&6)|(1&2)
1.85 albertel 1091: $expression=~
1.105 albertel 1092: s/\((\([_\.\d]+(?:\&[_\.\d]+)*\))((?:\|\([_\.\d]+(?:\&[_\.\d]+)*\))+)\)\|(\([_\.\d]+(?:\&[_\.\d]+)*\))/\($1$2\|$3\)/g;
1.85 albertel 1093: return $expression;
1.3 www 1094: }
1095:
1.2 www 1096: # -------------------------------------------------------- Build condition hash
1097:
1.140 foxr 1098: #
1099: # Traces a route recursively through the map after it has been loaded
1100: # (I believe this really visits each resourcde that is reachable fromt he
1101: # start top node.
1102: #
1103: # - Marks hidden resources as hidden.
1104: # - Marks which resource URL's must be encrypted.
1105: # - Figures out (if necessary) the first resource in the map.
1106: # - Further builds the chunks of the big hash that define how
1107: # conditions work
1108: #
1109: # Note that the tracing strategy won't visit resources that are not linked to
1110: # anything or islands in the map (groups of resources that form a path but are not
1111: # linked in to the path that can be traced from the start resource...but that's ok
1112: # because by definition, those resources are not reachable by users of the course.
1113: #
1114: # Parameters:
1115: # sofar - _URI of the prior entry or 0 if this is the top.
1116: # rid - URI of the resource to visit.
1117: # beenhere - list of resources (each resource enclosed by &'s) that have
1118: # already been visited.
1119: # encflag - If true the resource that resulted in a recursive call to us
1120: # has an encoded URL (which means contained resources should too).
1121: # hdnflag - If true,the resource that resulted in a recursive call to us
1122: # was hidden (which means contained resources should be hidden too).
1123: # Returns
1124: # new value indicating how far the map has been traversed (the sofar).
1125: #
1.2 www 1126: sub traceroute {
1.149.2.5.2.1 (raeburn 1127:: my ($sofar,$rid,$beenhere,$encflag,$hdnflag,$cid)=@_;
1.81 albertel 1128: my $newsofar=$sofar=simplify($sofar);
1.140 foxr 1129:
1.120 albertel 1130: unless ($beenhere=~/\&\Q$rid\E\&/) {
1.85 albertel 1131: $beenhere.=$rid.'&';
1132: my ($mapid,$resid)=split(/\./,$rid);
1133: my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,$hash{'src_'.$rid});
1134: my $hidden=&Apache::lonnet::EXT('resource.0.hiddenresource',$symb);
1.91 albertel 1135:
1.90 albertel 1136: if ($hdnflag || lc($hidden) eq 'yes') {
1137: $hiddenurl{$rid}=1;
1.91 albertel 1138: }
1139: if (!$hdnflag && lc($hidden) eq 'no') {
1.90 albertel 1140: delete($hiddenurl{$rid});
1141: }
1.91 albertel 1142:
1.85 albertel 1143: my $encrypt=&Apache::lonnet::EXT('resource.0.encrypturl',$symb);
1144: if ($encflag || lc($encrypt) eq 'yes') { $encurl{$rid}=1; }
1.140 foxr 1145:
1.116 www 1146: if (($retfrid eq '') && ($hash{'src_'.$rid})
1.85 albertel 1147: && ($hash{'src_'.$rid}!~/\.sequence$/)) {
1.116 www 1148: $retfrid=$rid;
1.85 albertel 1149: }
1.140 foxr 1150:
1.149.2.5.2.1 (raeburn 1151:: my (@deeplink,@recurseup);
1152:: if ($hash{'is_map_'.$rid}) {
1153:: my ($cdom,$cnum) = split(/_/,$cid);
1154:: my $mapsrc = $hash{'src_'.$rid};
1155:: my $map_pc = $hash{'map_pc_'.$mapsrc};
1156:: my @pcs = split(/,/,$hash{'map_hierarchy_'.$map_pc});
1157:: shift(@pcs);
1158:: @recurseup = map { &Apache::lonnet::declutter($hash{'map_id_'.$_}) } reverse(@pcs);
1159:: my $mapname = &Apache::lonnet::declutter(&Apache::lonnet::deversion($mapsrc));
1160:: my $deeplinkval = &get_mapparam($env{'user.name'},$env{'user.domain'},$cnum,$cdom,
1161:: $rid,$mapname,'0.deeplink',\@recurseup);
1162:: if ($deeplinkval ne '') {
1163:: @deeplink = ($deeplinkval,'map');
1164:: }
1165:: } else {
1166:: my @pcs = split(/,/,$hash{'map_hierarchy_'.$mapid});
1167:: shift(@pcs);
1168:: @recurseup = map { &Apache::lonnet::declutter($hash{'map_id_'.$_}) } reverse(@pcs);
1169:: @deeplink = &Apache::lonnet::EXT('resource.0.deeplink',$symb,'','','','',$cid,\@recurseup);
1170:: }
1171:: unless (@deeplink < 2) {
1172:: $hash{'deeplinkonly_'.$rid}=join(':',map { &escape($_); } @deeplink);
1.149.2.5.2.4! (raeburn 1173:: my ($state,$others,$listed,$scope,$protect) = split(/,/,$deeplink[0]);
! 1174:: if (($state eq 'only') && ($protect ne 'none') && ($protect ne '')) {
! 1175:: my ($acctype,$item) = split(/:/,$protect);
! 1176:: if ($acctype =~ /lti(c|d)$/) {
! 1177:: $deeplinkonlyprot{$1}{$item} = 1;
! 1178:: }
! 1179:: }
1.149.2.5.2.1 (raeburn 1180:: }
1.85 albertel 1181: if (defined($hash{'conditions_'.$rid})) {
1182: $hash{'conditions_'.$rid}=simplify(
1.103 albertel 1183: '('.$hash{'conditions_'.$rid}.')|('.$sofar.')');
1.85 albertel 1184: } else {
1185: $hash{'conditions_'.$rid}=$sofar;
1186: }
1.107 albertel 1187:
1188: # if the expression is just the 0th condition keep it
1189: # otherwise leave a pointer to this condition expression
1.140 foxr 1190:
1.107 albertel 1191: $newsofar = ($sofar eq '0') ? $sofar : '_'.$rid;
1192:
1.140 foxr 1193: # Recurse if the resource is a map:
1194:
1.85 albertel 1195: if (defined($hash{'is_map_'.$rid})) {
1196: if (defined($hash{'map_start_'.$hash{'src_'.$rid}})) {
1197: $sofar=$newsofar=
1198: &traceroute($sofar,
1.126 albertel 1199: $hash{'map_start_'.$hash{'src_'.$rid}},
1200: $beenhere,
1.85 albertel 1201: $encflag || $encurl{$rid},
1.149.2.5.2.1 (raeburn 1202:: $hdnflag || $hiddenurl{$rid},
1203:: $cid);
1.85 albertel 1204: }
1205: }
1.140 foxr 1206:
1207: # Processes links to this resource:
1208: # - verify the existence of any conditionals on the link to here.
1209: # - Recurse to any resources linked to us.
1210: #
1.85 albertel 1211: if (defined($hash{'to_'.$rid})) {
1.106 albertel 1212: foreach my $id (split(/\,/,$hash{'to_'.$rid})) {
1.2 www 1213: my $further=$sofar;
1.140 foxr 1214: #
1215: # If there's a condition associated with this link be sure
1216: # it's been defined else that's an error:
1217: #
1.106 albertel 1218: if ($hash{'undercond_'.$id}) {
1219: if (defined($hash{'condid_'.$hash{'undercond_'.$id}})) {
1.105 albertel 1220: $further=simplify('('.'_'.$rid.')&('.
1.106 albertel 1221: $hash{'condid_'.$hash{'undercond_'.$id}}.')');
1.85 albertel 1222: } else {
1.147 raeburn 1223: $errtext.= '<br />'.
1224: &mt('Undefined condition ID: [_1]',
1225: $hash{'undercond_'.$id});
1.85 albertel 1226: }
1.2 www 1227: }
1.140 foxr 1228: # Recurse to resoruces that have to's to us.
1.106 albertel 1229: $newsofar=&traceroute($further,$hash{'goesto_'.$id},$beenhere,
1.149.2.5.2.1 (raeburn 1230:: $encflag,$hdnflag,$cid);
1.85 albertel 1231: }
1232: }
1.2 www 1233: }
1.81 albertel 1234: return $newsofar;
1.2 www 1235: }
1.1 www 1236:
1.19 www 1237: # ------------------------------ Cascading conditions, quick access, parameters
1.4 www 1238:
1.140 foxr 1239: #
1240: # Seems a rather strangely named sub given what the comment above says it does.
1241:
1242:
1.4 www 1243: sub accinit {
1244: my ($uri,$short,$fn)=@_;
1245: my %acchash=();
1246: my %captured=();
1247: my $condcounter=0;
1.5 www 1248: $acchash{'acc.cond.'.$short.'.0'}=0;
1.140 foxr 1249:
1250: # This loop is only interested in conditions and
1251: # parameters in the big hash:
1252:
1.104 albertel 1253: foreach my $key (keys(%hash)) {
1.140 foxr 1254:
1255: # conditions:
1256:
1.104 albertel 1257: if ($key=~/^conditions/) {
1258: my $expr=$hash{$key};
1.140 foxr 1259:
1.109 albertel 1260: # try to find and factor out common sub-expressions
1.140 foxr 1261: # Any subexpression that is found is simplified, removed from
1262: # the original condition expression and the simplified sub-expression
1263: # substituted back in to the epxression..I'm not actually convinced this
1264: # factors anything out...but instead maybe simplifies common factors(?)
1265:
1.105 albertel 1266: foreach my $sub ($expr=~m/(\(\([_\.\d]+(?:\&[_\.\d]+)+\)(?:\|\([_\.\d]+(?:\&[_\.\d]+)+\))+\))/g) {
1.104 albertel 1267: my $orig=$sub;
1.109 albertel 1268:
1269: my ($factor) = ($sub=~/\(\(([_\.\d]+\&(:?[_\.\d]+\&)*)(?:[_\.\d]+\&*)+\)(?:\|\(\1(?:[_\.\d]+\&*)+\))+\)/);
1270: next if (!defined($factor));
1271:
1272: $sub=~s/\Q$factor\E//g;
1.85 albertel 1273: $sub=~s/^\(/\($factor\(/;
1274: $sub.=')';
1275: $sub=simplify($sub);
1.109 albertel 1276: $expr=~s/\Q$orig\E/$sub/;
1.85 albertel 1277: }
1.104 albertel 1278: $hash{$key}=$expr;
1.140 foxr 1279:
1280: # If not yet seen, record in acchash and that we've seen it.
1281:
1.85 albertel 1282: unless (defined($captured{$expr})) {
1283: $condcounter++;
1284: $captured{$expr}=$condcounter;
1285: $acchash{'acc.cond.'.$short.'.'.$condcounter}=$expr;
1286: }
1.140 foxr 1287: # Parameters:
1288:
1.104 albertel 1289: } elsif ($key=~/^param_(\d+)\.(\d+)/) {
1.86 albertel 1290: my $prefix=&Apache::lonnet::encode_symb($hash{'map_id_'.$1},$2,
1291: $hash{'src_'.$1.'.'.$2});
1.104 albertel 1292: foreach my $param (split(/\&/,$hash{$key})) {
1293: my ($typename,$value)=split(/\=/,$param);
1.85 albertel 1294: my ($type,$name)=split(/\:/,$typename);
1.114 www 1295: $parmhash{$prefix.'.'.&unescape($name)}=
1296: &unescape($value);
1297: $parmhash{$prefix.'.'.&unescape($name).'.type'}=
1298: &unescape($type);
1.85 albertel 1299: }
1300: }
1.26 harris41 1301: }
1.140 foxr 1302: # This loop only processes id entries in the big hash.
1303:
1.104 albertel 1304: foreach my $key (keys(%hash)) {
1305: if ($key=~/^ids/) {
1306: foreach my $resid (split(/\,/,$hash{$key})) {
1.85 albertel 1307: my $uri=$hash{'src_'.$resid};
1.100 albertel 1308: my ($uripath,$urifile) =
1309: &Apache::lonnet::split_uri_for_cond($uri);
1.85 albertel 1310: if ($uripath) {
1311: my $uricond='0';
1312: if (defined($hash{'conditions_'.$resid})) {
1313: $uricond=$captured{$hash{'conditions_'.$resid}};
1314: }
1315: if (defined($acchash{'acc.res.'.$short.'.'.$uripath})) {
1316: if ($acchash{'acc.res.'.$short.'.'.$uripath}=~
1317: /(\&\Q$urifile\E\:[^\&]*)/) {
1318: my $replace=$1;
1319: my $regexp=$replace;
1320: #$regexp=~s/\|/\\\|/g;
1.105 albertel 1321: $acchash{'acc.res.'.$short.'.'.$uripath} =~
1.104 albertel 1322: s/\Q$regexp\E/$replace\|$uricond/;
1.85 albertel 1323: } else {
1324: $acchash{'acc.res.'.$short.'.'.$uripath}.=
1325: $urifile.':'.$uricond.'&';
1326: }
1327: } else {
1328: $acchash{'acc.res.'.$short.'.'.$uripath}=
1329: '&'.$urifile.':'.$uricond.'&';
1330: }
1331: }
1332: }
1333: }
1.26 harris41 1334: }
1.24 www 1335: $acchash{'acc.res.'.$short.'.'}='&:0&';
1.8 www 1336: my $courseuri=$uri;
1337: $courseuri=~s/^\/res\///;
1.131 raeburn 1338: my $regexp = 1;
1339: &Apache::lonnet::delenv('(acc\.|httpref\.)',$regexp);
1.128 raeburn 1340: &Apache::lonnet::appenv(\%acchash);
1.4 www 1341: }
1342:
1.73 www 1343: # ---------------- Selectively delete from randompick maps and hidden url parms
1.29 www 1344:
1.73 www 1345: sub hiddenurls {
1.31 www 1346: my $randomoutentry='';
1.149 raeburn 1347: foreach my $rid (keys(%randompick)) {
1.29 www 1348: my $rndpick=$randompick{$rid};
1349: my $mpc=$hash{'map_pc_'.$hash{'src_'.$rid}};
1350: # ------------------------------------------- put existing resources into array
1351: my @currentrids=();
1.106 albertel 1352: foreach my $key (sort(keys(%hash))) {
1353: if ($key=~/^src_($mpc\.\d+)/) {
1.29 www 1354: if ($hash{'src_'.$1}) { push @currentrids, $1; }
1355: }
1356: }
1.50 albertel 1357: # rids are number.number and we want to numercially sort on
1358: # the second number
1359: @currentrids=sort {
1360: my (undef,$aid)=split(/\./,$a);
1361: my (undef,$bid)=split(/\./,$b);
1362: $aid <=> $bid;
1363: } @currentrids;
1.29 www 1364: next if ($#currentrids<$rndpick);
1365: # -------------------------------- randomly eliminate the ones that should stay
1.50 albertel 1366: my (undef,$id)=split(/\./,$rid);
1.51 www 1367: if ($randompickseed{$rid}) { $id=$randompickseed{$rid}; }
1.146 raeburn 1368: my $setcode;
1369: if (defined($randomizationcode{$rid})) {
1370: if ($env{'form.CODE'} eq '') {
1371: $env{'form.CODE'} = $randomizationcode{$rid};
1372: $setcode = 1;
1373: }
1374: }
1.50 albertel 1375: my $rndseed=&Apache::lonnet::rndseed($id); # use id instead of symb
1.146 raeburn 1376: if ($setcode) {
1377: undef($env{'form.CODE'});
1378: undef($setcode);
1379: }
1.58 albertel 1380: &Apache::lonnet::setup_random_from_rndseed($rndseed);
1.50 albertel 1381: my @whichids=&Math::Random::random_permuted_index($#currentrids+1);
1382: for (my $i=1;$i<=$rndpick;$i++) { $currentrids[$whichids[$i]]=''; }
1383: #&Apache::lonnet::logthis("$id,$rndseed,".join(':',@whichids));
1.29 www 1384: # -------------------------------------------------------- delete the leftovers
1385: for (my $k=0; $k<=$#currentrids; $k++) {
1386: if ($currentrids[$k]) {
1387: $hash{'randomout_'.$currentrids[$k]}=1;
1.32 www 1388: my ($mapid,$resid)=split(/\./,$currentrids[$k]);
1.149.2.2 raeburn 1389: if ($rescount{$mapid}) {
1390: $rescount{$mapid} --;
1391: }
1392: if ($hash{'is_map_'.$currentrids[$k]}) {
1393: if ($mapcount{$mapid}) {
1394: $mapcount{$mapid} --;
1395: }
1396: }
1.32 www 1397: $randomoutentry.='&'.
1.86 albertel 1398: &Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},
1399: $resid,
1400: $hash{'src_'.$currentrids[$k]}
1401: ).'&';
1.29 www 1402: }
1403: }
1.31 www 1404: }
1.73 www 1405: # ------------------------------ take care of explicitly hidden urls or folders
1.149 raeburn 1406: foreach my $rid (keys(%hiddenurl)) {
1.73 www 1407: $hash{'randomout_'.$rid}=1;
1408: my ($mapid,$resid)=split(/\./,$rid);
1.149.2.2 raeburn 1409: if ($rescount{$mapid}) {
1410: $rescount{$mapid} --;
1411: }
1412: if ($hash{'is_map_'.$rid}) {
1413: if ($mapcount{$mapid}) {
1414: $mapcount{$mapid} --;
1415: }
1416: }
1.73 www 1417: $randomoutentry.='&'.
1.86 albertel 1418: &Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,
1419: $hash{'src_'.$rid}).'&';
1.73 www 1420: }
1421: # --------------------------------------- append randomout entry to environment
1.31 www 1422: if ($randomoutentry) {
1.128 raeburn 1423: &Apache::lonnet::appenv({'acc.randomout' => $randomoutentry});
1.29 www 1424: }
1425: }
1426:
1.149.2.5.2.1 (raeburn 1427:: sub deeplinkouts {
1428:: my $deeplinkoutentry;
1429:: foreach my $rid (keys(%deeplinkout)) {
1430:: $hash{'deeplinkout_'.$rid}=1;
1431:: my ($mapid,$resid)=split(/\./,$rid);
1432:: $deeplinkoutentry.='&'.
1433:: &Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,
1434:: $hash{'src_'.$rid}).'&';
1435:: }
1436:: # --------------------------------------- append deeplinkout entry to environment
1437:: if ($deeplinkoutentry) {
1438:: &Apache::lonnet::appenv({'acc.deeplinkout' => $deeplinkoutentry});
1439:: }
1440:: }
1441::
1.149.2.2 raeburn 1442: # -------------------------------------- populate big hash with map breadcrumbs
1443:
1444: # Create map_breadcrumbs_$pc from map_hierarchy_$pc by omitting intermediate
1445: # maps not shown in Course Contents table.
1446:
1447: sub mapcrumbs {
1.149.2.5.2.1 (raeburn 1448:: my ($cid) = @_;
1.149.2.2 raeburn 1449: foreach my $key (keys(%rescount)) {
1450: if ($hash{'map_hierarchy_'.$key}) {
1451: my $skipnext = 0;
1452: foreach my $id (split(/,/,$hash{'map_hierarchy_'.$key}),$key) {
1.149.2.5.2.1 (raeburn 1453:: my $rid = $hash{'ids_'.$hash{'map_id_'.$id}};
1454:: unless (($skipnext) || (!&is_advanced($cid) && $hash{'deeplinkout_'.$rid})) {
1.149.2.2 raeburn 1455: $hash{'map_breadcrumbs_'.$key} .= "$id,";
1456: }
1457: unless (($id == 0) || ($id == 1)) {
1458: if ((!$rescount{$id}) || ($rescount{$id} == 1 && $mapcount{$id} == 1)) {
1459: $skipnext = 1;
1460: } else {
1461: $skipnext = 0;
1462: }
1463: }
1464: }
1465: $hash{'map_breadcrumbs_'.$key} =~ s/,$//;
1466: }
1467: }
1468: }
1469:
1.1 www 1470: # ---------------------------------------------------- Read map and all submaps
1471:
1472: sub readmap {
1.149.2.5 raeburn 1473: my ($short,$critmsg_check) = @_;
1.85 albertel 1474: $short=~s/^\///;
1.138 foxr 1475:
1476: # TODO: Hidden dependency on current user:
1477:
1478: my %cenv=&Apache::lonnet::coursedescription($short,{'freshen_cache'=>1});
1479:
1.85 albertel 1480: my $fn=$cenv{'fn'};
1481: my $uri;
1482: $short=~s/\//\_/g;
1483: unless ($uri=$cenv{'url'}) {
1.133 raeburn 1484: &Apache::lonnet::logthis('<font color="blue">WARNING: '.
1.85 albertel 1485: "Could not load course $short.</font>");
1.114 www 1486: return ('',&mt('No course data available.'));;
1.85 albertel 1487: }
1488: @cond=('true:normal');
1.96 albertel 1489:
1.149.2.2 raeburn 1490: unless (open(LOCKFILE,">","$fn.db.lock")) {
1.138 foxr 1491: #
1492: # Most likely a permissions problem on the lockfile or its directory.
1493: #
1.133 raeburn 1494: $retfurl = '';
1.144 raeburn 1495: return ($retfurl,'<br />'.&mt('Map not loaded - Lock file could not be opened when reading map:').' <tt>'.$fn.'</tt>.');
1.133 raeburn 1496: }
1.96 albertel 1497: my $lock=0;
1.132 raeburn 1498: my $gotstate=0;
1.138 foxr 1499:
1500: # If we can get the lock without delay any files there are idle
1501: # and from some prior request. We'll kill them off and regenerate them:
1502:
1503: if (flock(LOCKFILE,LOCK_EX|LOCK_NB)) {
1504: $lock=1; # Remember that we hold the lock.
1.132 raeburn 1505: &unlink_tmpfiles($fn);
1.96 albertel 1506: }
1.85 albertel 1507: undef %randompick;
1.149.2.1 raeburn 1508: undef %randompickseed;
1509: undef %randomorder;
1.149.2.2 raeburn 1510: undef %randomizationcode;
1.85 albertel 1511: undef %hiddenurl;
1512: undef %encurl;
1.149.2.5.2.1 (raeburn 1513:: undef %deeplinkout;
1.149.2.5.2.4! (raeburn 1514:: undef %deeplinkonlyprot;
1.149.2.2 raeburn 1515: undef %rescount;
1516: undef %mapcount;
1.116 www 1517: $retfrid='';
1.144 raeburn 1518: $errtext='';
1.138 foxr 1519: my ($untiedhash,$untiedparmhash,$tiedhash,$tiedparmhash); # More state flags.
1520:
1521: # if we got the lock, regenerate course regnerate empty files and tie them.
1522:
1.132 raeburn 1523: if ($lock) {
1524: if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_WRCREAT(),0640)) {
1525: $tiedhash = 1;
1526: if (tie(%parmhash,'GDBM_File',$fn.'_parms.db',&GDBM_WRCREAT(),0640)) {
1527: $tiedparmhash = 1;
1.138 foxr 1528: $gotstate = &build_tmp_hashes($uri,
1529: $fn,
1530: $short,
1531: \%cenv); # TODO: Need to provide requested user@dom
1.132 raeburn 1532: unless ($gotstate) {
1533: &Apache::lonnet::logthis('Failed to write statemap at first attempt '.$fn.' for '.$uri.'.</font>');
1534: }
1535: $untiedparmhash = untie(%parmhash);
1536: unless ($untiedparmhash) {
1537: &Apache::lonnet::logthis('<font color="blue">WARNING: '.
1538: 'Could not untie coursemap parmhash '.$fn.' for '.$uri.'.</font>');
1539: }
1540: }
1541: $untiedhash = untie(%hash);
1542: unless ($untiedhash) {
1543: &Apache::lonnet::logthis('<font color="blue">WARNING: '.
1544: 'Could not untie coursemap hash '.$fn.' for '.$uri.'.</font>');
1545: }
1546: }
1.138 foxr 1547: flock(LOCKFILE,LOCK_UN); # RF: this is what I don't get unless there are other
1548: # unlocked places the remainder happens..seems like if we
1549: # just kept the lock here the rest of the code would have
1550: # been much easier?
1.132 raeburn 1551: }
1552: unless ($lock && $tiedhash && $tiedparmhash) {
1.87 albertel 1553: # if we are here it is likely because we are already trying to
1554: # initialize the course in another child, busy wait trying to
1555: # tie the hashes for the next 90 seconds, if we succeed forward
1556: # them on to navmaps, if we fail, throw up the Could not init
1557: # course screen
1.138 foxr 1558: #
1559: # RF: I'm not seeing the case where the ties/unties can fail in a way
1560: # that can be remedied by this. Since we owned the lock seems
1561: # Tie/untie failures are a result of something like a permissions problem instead?
1562: #
1563:
1564: # In any vent, undo what we did manage to do above first:
1.96 albertel 1565: if ($lock) {
1566: # Got the lock but not the DB files
1567: flock(LOCKFILE,LOCK_UN);
1.132 raeburn 1568: $lock = 0;
1.96 albertel 1569: }
1.132 raeburn 1570: if ($tiedhash) {
1571: unless($untiedhash) {
1572: untie(%hash);
1573: }
1574: }
1575: if ($tiedparmhash) {
1576: unless($untiedparmhash) {
1577: untie(%parmhash);
1578: }
1579: }
1.138 foxr 1580: # Log our failure:
1581:
1.133 raeburn 1582: &Apache::lonnet::logthis('<font color="blue">WARNING: '.
1.132 raeburn 1583: "Could not tie coursemap $fn for $uri.</font>");
1584: $tiedhash = '';
1585: $tiedparmhash = '';
1.87 albertel 1586: my $i=0;
1.138 foxr 1587:
1588: # Keep on retrying the lock for 90 sec until we succeed.
1589:
1.87 albertel 1590: while($i<90) {
1591: $i++;
1592: sleep(1);
1.132 raeburn 1593: if (flock(LOCKFILE,LOCK_EX|LOCK_NB)) {
1.138 foxr 1594:
1595: # Got the lock, tie the hashes...the assumption in this code is
1596: # that some other worker thread has created the db files quite recently
1597: # so no load is needed:
1598:
1.132 raeburn 1599: $lock = 1;
1600: if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER(),0640)) {
1601: $tiedhash = 1;
1602: if (tie(%parmhash,'GDBM_File',$fn.'_parms.db',&GDBM_READER(),0640)) {
1603: $tiedparmhash = 1;
1604: if (-e "$fn.state") {
1605: $retfurl='/adm/navmaps';
1.138 foxr 1606:
1607: # BUG BUG: Side effect!
1608: # Should conditionalize on something so that we can use this
1609: # to load maps for courses that are not current?
1610: #
1.132 raeburn 1611: &Apache::lonnet::appenv({"request.course.id" => $short,
1612: "request.course.fn" => $fn,
1.143 raeburn 1613: "request.course.uri" => $uri,
1614: "request.course.tied" => time});
1615:
1.132 raeburn 1616: $untiedhash = untie(%hash);
1617: $untiedparmhash = untie(%parmhash);
1618: $gotstate = 1;
1619: last;
1620: }
1621: $untiedparmhash = untie(%parmhash);
1622: }
1623: $untiedhash = untie(%hash);
1624: }
1625: }
1.87 albertel 1626: }
1.132 raeburn 1627: if ($lock) {
1628: flock(LOCKFILE,LOCK_UN);
1.133 raeburn 1629: $lock = 0;
1.132 raeburn 1630: if ($tiedparmhash) {
1631: unless ($untiedparmhash) {
1632: &Apache::lonnet::logthis('<font color="blue">WARNING: '.
1633: 'Could not untie coursemap parmhash '.$fn.' for '.$uri.'.</font>');
1634: }
1635: }
1636: if ($tiedparmhash) {
1637: unless ($untiedhash) {
1638: &Apache::lonnet::logthis('<font color="blue">WARNING: '.
1639: 'Could not untie coursemap hash '.$fn.' for '.$uri.'.</font>');
1640: }
1641: }
1642: }
1643: }
1.138 foxr 1644: # I think this branch of code is all about what happens if we just did the stuff above,
1645: # but found that the state file did not exist...again if we'd just held the lock
1646: # would that have made this logic simpler..as generating all the files would be
1647: # an atomic operation with respect to the lock.
1648: #
1.132 raeburn 1649: unless ($gotstate) {
1.133 raeburn 1650: $lock = 0;
1.132 raeburn 1651: &Apache::lonnet::logthis('<font color="blue">WARNING: '.
1652: 'Could not read statemap '.$fn.' for '.$uri.'.</font>');
1653: &unlink_tmpfiles($fn);
1.133 raeburn 1654: if (flock(LOCKFILE,LOCK_EX|LOCK_NB)) {
1655: $lock=1;
1656: }
1657: undef %randompick;
1.149.2.1 raeburn 1658: undef %randompickseed;
1659: undef %randomorder;
1.149.2.2 raeburn 1660: undef %randomizationcode;
1.133 raeburn 1661: undef %hiddenurl;
1662: undef %encurl;
1.149.2.5.2.1 (raeburn 1663:: undef %deeplinkout;
1.149.2.5.2.4! (raeburn 1664:: undef %deeplinkonlyprot;
1.149.2.2 raeburn 1665: undef %rescount;
1666: undef %mapcount;
1.144 raeburn 1667: $errtext='';
1.133 raeburn 1668: $retfrid='';
1.138 foxr 1669: #
1670: # Once more through the routine of tying and loading and so on.
1671: #
1.133 raeburn 1672: if ($lock) {
1673: if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_WRCREAT(),0640)) {
1674: if (tie(%parmhash,'GDBM_File',$fn.'_parms.db',&GDBM_WRCREAT(),0640)) {
1.138 foxr 1675: $gotstate = &build_tmp_hashes($uri,$fn,$short,\%cenv); # TODO: User dependent?
1.133 raeburn 1676: unless ($gotstate) {
1.132 raeburn 1677: &Apache::lonnet::logthis('<font color="blue">WARNING: '.
1.133 raeburn 1678: 'Failed to write statemap at second attempt '.$fn.' for '.$uri.'.</font>');
1.132 raeburn 1679: }
1.133 raeburn 1680: unless (untie(%parmhash)) {
1.132 raeburn 1681: &Apache::lonnet::logthis('<font color="blue">WARNING: '.
1.133 raeburn 1682: 'Could not untie coursemap parmhash '.$fn.'.db for '.$uri.'.</font>');
1.132 raeburn 1683: }
1.133 raeburn 1684: } else {
1685: &Apache::lonnet::logthis('<font color="blue">WARNING: '.
1686: 'Could not tie coursemap '.$fn.'__parms.db for '.$uri.'.</font>');
1687: }
1688: unless (untie(%hash)) {
1689: &Apache::lonnet::logthis('<font color="blue">WARNING: '.
1690: 'Could not untie coursemap hash '.$fn.'.db for '.$uri.'.</font>');
1691: }
1.132 raeburn 1692: } else {
1.133 raeburn 1693: &Apache::lonnet::logthis('<font color="blue">WARNING: '.
1694: 'Could not tie coursemap '.$fn.'.db for '.$uri.'.</font>');
1.132 raeburn 1695: }
1.133 raeburn 1696: flock(LOCKFILE,LOCK_UN);
1697: $lock = 0;
1698: } else {
1.138 foxr 1699: # Failed to get the immediate lock.
1700:
1.133 raeburn 1701: &Apache::lonnet::logthis('<font color="blue">WARNING: '.
1702: 'Could not obtain lock to tie coursemap hash '.$fn.'.db for '.$uri.'.</font>');
1.132 raeburn 1703: }
1704: }
1.133 raeburn 1705: close(LOCKFILE);
1.132 raeburn 1706: unless (($errtext eq '') || ($env{'request.course.uri'} =~ m{^/uploaded/})) {
1707: &Apache::lonmsg::author_res_msg($env{'request.course.uri'},
1.138 foxr 1708: $errtext); # TODO: User dependent?
1.1 www 1709: }
1.46 www 1710: # ------------------------------------------------- Check for critical messages
1711:
1.138 foxr 1712: # Depends on user must parameterize this as well..or separate as this is:
1713: # more part of determining what someone sees on entering a course?
1.149.2.5 raeburn 1714: # When lonuserstate::readmap() is called from lonroles.pm, i.e.,
1715: # after selecting a role in a course, critical_redirect will be called,
1716: # unless the course has a blocking event in effect, which suppresses
1717: # critical message checking (users without evb priv).
1718: #
1.138 foxr 1719:
1.149.2.5 raeburn 1720: if ($critmsg_check) {
1721: my ($redirect,$url) = &Apache::loncommon::critical_redirect();
1722: if ($redirect) {
1723: $retfurl = $url;
1.46 www 1724: }
1.149.2.5 raeburn 1725: }
1.85 albertel 1726: return ($retfurl,$errtext);
1.1 www 1727: }
1.15 www 1728:
1.138 foxr 1729: #
1730: # This sub is called when the course hash and the param hash have been tied and
1731: # their lock file is held.
1732: # Parameters:
1733: # $uri - URI that identifies the course.
1734: # $fn - The base path/filename of the files that make up the context
1735: # being built.
1736: # $short - Short course name.
1737: # $cenvref - Reference to the course environment hash returned by
1738: # Apache::lonnet::coursedescription
1739: #
1740: # Assumptions:
1741: # The globals
1742: # %hash, %paramhash are tied to their gdbm files and we hold the lock on them.
1743: #
1.132 raeburn 1744: sub build_tmp_hashes {
1745: my ($uri,$fn,$short,$cenvref) = @_;
1.138 foxr 1746:
1.132 raeburn 1747: unless(ref($cenvref) eq 'HASH') {
1748: return;
1749: }
1750: my %cenv = %{$cenvref};
1751: my $gotstate = 0;
1.138 foxr 1752: %hash=(); # empty the global course and parameter hashes.
1.132 raeburn 1753: %parmhash=();
1.138 foxr 1754: $errtext=''; # No error messages yet.
1.132 raeburn 1755: $pc=0;
1756: &clear_mapalias_count();
1757: &processversionfile(%cenv);
1.140 foxr 1758:
1759: # URI Of the map file.
1760:
1.132 raeburn 1761: my $furi=&Apache::lonnet::clutter($uri);
1.138 foxr 1762: #
1763: # the map staring points.
1764: #
1.132 raeburn 1765: $hash{'src_0.0'}=&versiontrack($furi);
1766: $hash{'title_0.0'}=&Apache::lonnet::metadata($uri,'title');
1767: $hash{'ids_'.$furi}='0.0';
1768: $hash{'is_map_0.0'}=1;
1.140 foxr 1769:
1770: # Load the map.. note that loadmap may implicitly recurse if the map contains
1771: # sub-maps.
1772:
1.146 raeburn 1773: &loadmap($uri,'0.0',$short);
1.140 foxr 1774:
1775: # The code below only executes if there is a starting point for the map>
1776: # Q/BUG??? If there is no start resource for the map should that be an error?
1777: #
1778:
1.132 raeburn 1779: if (defined($hash{'map_start_'.$uri})) {
1780: &Apache::lonnet::appenv({"request.course.id" => $short,
1781: "request.course.fn" => $fn,
1.143 raeburn 1782: "request.course.uri" => $uri,
1783: "request.course.tied" => time});
1.132 raeburn 1784: $env{'request.course.id'}=$short;
1.149.2.5.2.1 (raeburn 1785:: &traceroute('0',$hash{'map_start_'.$uri},'&','','',$short);
1.132 raeburn 1786: &accinit($uri,$short,$fn);
1787: &hiddenurls();
1788: }
1.149.2.5.2.4! (raeburn 1789:: my ($cdom,$cnum) = split(/_/,$short);
! 1790:: if (keys(%deeplinkonlyprot)) {
! 1791:: my %launchers;
! 1792:: if (ref($deeplinkonlyprot{'c'}) eq 'HASH') {
! 1793:: if (($cdom ne '') && ($cnum ne '')) {
! 1794:: my %crs_linkprot = &Apache::lonnet::get_course_lti($cnum,$cdom,'provider');
! 1795:: foreach my $num (keys(%{$deeplinkonlyprot{'c'}})) {
! 1796:: if ((ref($crs_linkprot{$num}) eq 'HASH') &&
! 1797:: ($crs_linkprot{$num}{'name'} ne '')) {
! 1798:: push(@{$launchers{$crs_linkprot{$num}{'name'}}},'c'.$num);
! 1799:: }
! 1800:: }
! 1801:: }
! 1802:: }
! 1803:: if (ref($deeplinkonlyprot{'d'}) eq 'HASH') {
! 1804:: if ($cdom ne '') {
! 1805:: my %dom_linkprot = &Apache::lonnet::get_domain_lti($cdom,'linkprot');
! 1806:: foreach my $num (keys(%{$deeplinkonlyprot{'d'}})) {
! 1807:: if ((ref($dom_linkprot{$num}) eq 'HASH') &&
! 1808:: ($dom_linkprot{$num}{'name'} ne '')) {
! 1809:: push(@{$launchers{$dom_linkprot{$num}{'name'}}},'d'.$num);
! 1810:: }
! 1811:: }
! 1812:: }
! 1813:: }
! 1814:: if (keys(%launchers)) {
! 1815:: my $value = '';
! 1816:: foreach my $key (sort(keys(%launchers))) {
! 1817:: if (ref($launchers{$key}) eq 'ARRAY') {
! 1818:: $value .= &escape($key).':'.join(',',@{$launchers{$key}}).'&';
! 1819:: }
! 1820:: }
! 1821:: $value =~ s/&$//;
! 1822:: &Apache::lonnet::appenv({'request.course.deeponlyprot' => $value});
! 1823:: }
! 1824:: }
1.132 raeburn 1825: $errtext .= &get_mapalias_errors();
1826: # ------------------------------------------------------- Put versions into src
1827: foreach my $key (keys(%hash)) {
1828: if ($key=~/^src_/) {
1829: $hash{$key}=&putinversion($hash{$key});
1830: } elsif ($key =~ /^(map_(?:start|finish|pc)_)(.*)/) {
1831: my ($type, $url) = ($1,$2);
1832: my $value = $hash{$key};
1833: $hash{$type.&putinversion($url)}=$value;
1834: }
1835: }
1836: # ---------------------------------------------------------------- Encrypt URLs
1837: foreach my $id (keys(%encurl)) {
1838: # $hash{'src_'.$id}=&Apache::lonenc::encrypted($hash{'src_'.$id});
1839: $hash{'encrypted_'.$id}=1;
1840: }
1841: # ----------------------------------------------- Close hashes to finally store
1842: # --------------------------------- Routine must pass this point, no early outs
1843: $hash{'first_rid'}=$retfrid;
1844: my ($mapid,$resid)=split(/\./,$retfrid);
1845: $hash{'first_mapurl'}=$hash{'map_id_'.$mapid};
1846: my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,$hash{'src_'.$retfrid});
1847: $retfurl=&add_get_param($hash{'src_'.$retfrid},{ 'symb' => $symb });
1848: if ($hash{'encrypted_'.$retfrid}) {
1849: $retfurl=&Apache::lonenc::encrypted($retfurl,(&Apache::lonnet::allowed('adv') ne 'F'));
1850: }
1851: $hash{'first_url'}=$retfurl;
1852: # ---------------------------------------------------- Store away initial state
1853: {
1854: my $cfh;
1.149.2.2 raeburn 1855: if (open($cfh,">","$fn.state")) {
1.132 raeburn 1856: print $cfh join("\n",@cond);
1857: $gotstate = 1;
1858: } else {
1859: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
1860: "Could not write statemap $fn for $uri.</font>");
1861: }
1862: }
1.149.2.5.2.1 (raeburn 1863::
1864:: # Was initial access via a deep-link?
1865:: if (($cdom ne '') && ($env{'request.deeplink.login'} ne '')) {
1866:: my $deeplink_symb = &Apache::loncommon::deeplink_login_symb($cnum,$cdom);
1867:: if ($deeplink_symb) {
1868:: my ($loginrid,$deeplink_login_pc,$login_hierarchy);
1869:: my ($map,$resid,$url) = &Apache::lonnet::decode_symb($deeplink_symb);
1870:: $loginrid = $hash{'map_pc_'.&Apache::lonnet::clutter($map)}.'.'.$resid;
1871:: if ($deeplink_symb =~ /\.(page|sequence)$/) {
1872:: $deeplink_login_pc = $hash{'map_pc_'.&Apache::lonnet::clutter($url)};
1873:: } else {
1874:: $deeplink_login_pc = $hash{'map_pc_'.&Apache::lonnet::clutter($map)};
1875:: }
1876:: my $deeplink;
1877:: if ($hash{'deeplinkonly_'.$loginrid} ne '') {
1878:: my @deeplinkinfo = map { &unescape($_); } split(/:/,$hash{'deeplinkonly_'.$loginrid});
1879:: unless (@deeplinkinfo < 2) {
1880:: $deeplink = $deeplinkinfo[0];
1881:: }
1882:: }
1883:: if ($deeplink) {
1884:: my $disallow;
1885:: my ($state,$others,$listed,$scope,$protect) = split(/,/,$deeplink);
1886:: if (($protect ne 'none') && ($protect ne '')) {
1887:: my ($acctype,$item) = split(/:/,$protect);
1888:: if ($acctype =~ /lti(c|d)$/) {
1889:: unless ($env{'request.linkprot'} eq $item.$1.':'.$env{'request.deeplink.login'}) {
1890:: $disallow = 1;
1891:: }
1892:: } elsif ($acctype eq 'key') {
1893:: unless ($env{'request.linkkey'} eq $item) {
1894:: $disallow = 1;
1895:: }
1896:: }
1897:: }
1898:: if ($disallow) {
1899:: &Apache::lonnet::delenv('request.deeplink.login');
1.149.2.5.2.2 (raeburn 1900:: if ($env{'request.deeplink.target'} ne '') {
1901:: &Apache::lonnet::delenv('request.deeplink.target');
1902:: }
1.149.2.5.2.1 (raeburn 1903:: } else {
1904:: if ($others eq 'hide') {
1905:: my @recfolders;
1906:: if ($scope eq 'rec') {
1907:: foreach my $key (keys(%hash)) {
1908:: if ($key=~/^map_hierarchy_(\d+)$/) {
1909:: my $mpc = $1;
1910:: my @ids = split(/,/,$hash{$key});
1911:: if (grep(/^$deeplink_login_pc$/,@ids)) {
1912:: my $idx;
1913:: foreach my $mapid (@ids) {
1914:: if ($idx) {
1915:: push(@recfolders,$mapid);
1916:: } elsif ($mapid == $deeplink_login_pc) {
1917:: push(@recfolders,$mapid);
1918:: $idx = $mapid;
1919:: }
1920:: }
1921:: push(@recfolders,$mpc);
1922:: }
1923:: }
1924:: }
1925:: }
1926:: foreach my $key (keys(%hash)) {
1927:: if ($key=~/^src_(.+)$/) {
1928:: my $rid = $1;
1929:: next if ($rid eq '0.0');
1930:: next if ($rid eq $loginrid);
1931:: if ($scope ne 'res') {
1932:: my $mapid = (split(/\./,$rid))[0];
1933:: next if ($mapid eq $deeplink_login_pc);
1934:: if ($scope eq 'rec') {
1935:: next if (grep(/^$mapid$/,@recfolders));
1936:: }
1937:: }
1938:: $deeplinkout{$rid} = 1;
1939:: }
1940:: }
1941:: }
1942:: }
1943:: &deeplinkouts();
1944:: }
1945:: }
1946:: }
1947:: &mapcrumbs();
1.132 raeburn 1948: return $gotstate;
1949: }
1950:
1951: sub unlink_tmpfiles {
1952: my ($fn) = @_;
1.138 foxr 1953: my $file_dir = dirname($fn);
1954:
1.145 raeburn 1955: if ("$file_dir/" eq LONCAPA::tempdir()) {
1.132 raeburn 1956: my @files = qw (.db _symb.db .state _parms.db);
1957: foreach my $file (@files) {
1958: if (-e $fn.$file) {
1959: unless (unlink($fn.$file)) {
1960: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
1961: "Could not unlink ".$fn.$file."</font>");
1962: }
1963: }
1964: }
1965: }
1966: return;
1967: }
1968:
1.15 www 1969: # ------------------------------------------------------- Evaluate state string
1970:
1971: sub evalstate {
1.89 albertel 1972: my $fn=$env{'request.course.fn'}.'.state';
1.80 albertel 1973: my $state='';
1.15 www 1974: if (-e $fn) {
1.80 albertel 1975: my @conditions=();
1976: {
1.149.2.2 raeburn 1977: open(my $fh,"<",$fn);
1.80 albertel 1978: @conditions=<$fh>;
1.115 raeburn 1979: close($fh);
1.80 albertel 1980: }
1981: my $safeeval = new Safe;
1982: my $safehole = new Safe::Hole;
1983: $safeeval->permit("entereval");
1984: $safeeval->permit(":base_math");
1985: $safeeval->deny(":base_io");
1986: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
1987: foreach my $line (@conditions) {
1988: chomp($line);
1989: my ($condition,$weight)=split(/\:/,$line);
1990: if ($safeeval->reval($condition)) {
1991: if ($weight eq 'force') {
1992: $state.='3';
1993: } else {
1994: $state.='2';
1995: }
1996: } else {
1997: if ($weight eq 'stop') {
1998: $state.='0';
1999: } else {
2000: $state.='1';
2001: }
2002: }
2003: }
1.15 www 2004: }
1.128 raeburn 2005: &Apache::lonnet::appenv({'user.state.'.$env{'request.course.id'} => $state});
1.15 www 2006: return $state;
2007: }
2008:
1.149.2.5.2.1 (raeburn 2009:: sub get_mapparam {
2010:: my ($uname,$udom,$cnum,$cdom,$rid,$mapname,$what,$recurseupref) = @_;
2011:: unless ($mapname) { return; }
2012::
2013:: # ------------------------------------------------- Get coursedata (if present)
2014:: my $courseopt=&Apache::lonnet::get_courseresdata($cnum,$cdom);
2015:: if (!ref($courseopt)) {
2016:: undef($courseopt);
2017:: }
2018::
2019:: # --------------------------------------------------- Get userdata (if present)
2020:: my $useropt=&Apache::lonnet::get_userresdata($uname,$udom);
2021:: if (!ref($useropt)) {
2022:: undef($useropt);
2023:: }
2024::
2025:: my @recurseup;
2026:: if (ref($recurseupref) eq 'ARRAY') {
2027:: @recurseup = @{$recurseupref};
2028:: }
2029::
2030:: # Get the section if there is one.
2031::
2032:: my $cid = $cdom.'_'.$cnum;
2033:: my $csec=$env{'request.course.sec'};
2034:: my $cgroup='';
2035:: my @cgrps=split(/:/,$env{'request.course.groups'});
2036:: if (@cgrps > 0) {
2037:: @cgrps = sort(@cgrps);
2038:: $cgroup = $cgrps[0];
2039:: }
2040::
2041:: my $rwhat=$what;
2042:: $what=~s/^parameter\_//;
2043:: $what=~s/\_/\./;
2044::
2045:: # Build the hash keys for the lookup:
2046::
2047:: my $mapparm=$mapname.'___(all).'.$what;
2048:: my $recurseparm=$mapname.'___(rec).'.$what;
2049:: my $usercourseprefix=$cid;
2050::
2051:: my $grplevelm = "$usercourseprefix.[$cgroup].$mapparm";
2052:: my $seclevelm = "$usercourseprefix.[$csec].$mapparm";
2053:: my $courselevelm = "$usercourseprefix.$mapparm";
2054::
2055:: my $grpleveli = "$usercourseprefix.[$cgroup].$recurseparm";
2056:: my $secleveli = "$usercourseprefix.[$csec].$recurseparm";
2057:: my $courseleveli = "$usercourseprefix.$recurseparm";
2058::
2059:: # Check per user
2060::
2061:: if ($uname and defined($useropt)) {
2062:: if (defined($$useropt{$courselevelm})) {
2063:: return $$useropt{$courselevelm};
2064:: }
2065:: if (defined($$useropt{$courseleveli})) {
2066:: return $$useropt{$courseleveli};
2067:: }
2068:: foreach my $item (@recurseup) {
2069:: my $norecursechk=$usercourseprefix.'.'.$item.'___(all).'.$what;
2070:: if (defined($$useropt{$norecursechk})) {
2071:: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
2072:: return $$useropt{$norecursechk};
2073:: } else {
2074:: last;
2075:: }
2076:: }
2077:: }
2078:: }
2079::
2080:: # Check course -- group
2081::
2082:: if ($cgroup ne '' and defined ($courseopt)) {
2083:: if (defined($$courseopt{$grplevelm})) {
2084:: return $$courseopt{$grplevelm};
2085:: }
2086:: if (defined($$courseopt{$grpleveli})) {
2087:: return $$courseopt{$grpleveli};
2088:: }
2089:: foreach my $item (@recurseup) {
2090:: my $norecursechk=$usercourseprefix.'.['.$cgroup.'].'.$item.'___(all).'.$what;
2091:: if (defined($$courseopt{$norecursechk})) {
2092:: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
2093:: return $$courseopt{$norecursechk};
2094:: } else {
2095:: last;
2096:: }
2097:: }
2098:: }
2099:: }
2100::
2101:: # Check course -- section
2102::
2103:: if ($csec ne '' and defined($courseopt)) {
2104:: if (defined($$courseopt{$seclevelm})) {
2105:: return $$courseopt{$seclevelm};
2106:: }
2107:: if (defined($$courseopt{$secleveli})) {
2108:: return $$courseopt{$secleveli};
2109:: }
2110:: foreach my $item (@recurseup) {
2111:: my $norecursechk=$usercourseprefix.'.['.$csec.'].'.$item.'___(all).'.$what;
2112:: if (defined($$courseopt{$norecursechk})) {
2113:: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
2114:: return $$courseopt{$norecursechk};
2115:: } else {
2116:: last;
2117:: }
2118:: }
2119:: }
2120:: }
2121::
2122:: # Check the map parameters themselves:
2123::
2124:: if ($hash{'param_'.$rid}) {
2125:: my @items = split(/\&/,$hash{'param_'.$rid});
2126:: my $thisparm;
2127:: foreach my $item (@items) {
2128:: my ($esctype,$escname,$escvalue) = ($item =~ /^([^:]+):([^=]+)=(.*)$/);
2129:: my $name = &unescape($escname);
2130:: my $value = &unescape($escvalue);
2131:: if ($name eq $what) {
2132:: $thisparm = $value;
2133:: last;
2134:: }
2135:: }
2136:: if (defined($thisparm)) {
2137:: return $thisparm;
2138:: }
2139:: }
2140::
2141:: # Additional course parameters:
2142::
2143:: if (defined($courseopt)) {
2144:: if (defined($$courseopt{$courselevelm})) {
2145:: return $$courseopt{$courselevelm};
2146:: }
2147::
2148:: if (defined($$courseopt{$courseleveli})) {
2149:: return $$courseopt{$courseleveli};
2150:: }
2151::
2152:: if (@recurseup) {
2153:: foreach my $item (@recurseup) {
2154:: my $norecursechk=$usercourseprefix.'.'.$item.'___(all).'.$what;
2155:: if (defined($$courseopt{$norecursechk})) {
2156:: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
2157:: return $$courseopt{$norecursechk};
2158:: } else {
2159:: last;
2160:: }
2161:: }
2162:: }
2163:: }
2164:: }
2165:: return undef;
2166:: }
2167::
1.138 foxr 2168: # This block seems to have code to manage/detect doubly defined
2169: # aliases in maps.
2170:
1.122 albertel 2171: {
2172: my %mapalias_cache;
2173: sub count_mapalias {
2174: my ($value,$resid) = @_;
2175: push(@{ $mapalias_cache{$value} }, $resid);
2176: }
2177:
2178: sub get_mapalias_errors {
2179: my $error_text;
2180: foreach my $mapalias (sort(keys(%mapalias_cache))) {
2181: next if (scalar(@{ $mapalias_cache{$mapalias} } ) == 1);
2182: my $count;
2183: my $which =
2184: join('</li><li>',
2185: map {
2186: my $id = $_;
2187: if (exists($hash{'src_'.$id})) {
2188: $count++;
2189: }
2190: my ($mapid) = split(/\./,$id);
1.147 raeburn 2191: &mt('Resource [_1][_2]in Map [_3]',
2192: $hash{'title_'.$id},'<br />',
1.122 albertel 2193: $hash{'title_'.$hash{'ids_'.$hash{'map_id_'.$mapid}}});
2194: } (@{ $mapalias_cache{$mapalias} }));
2195: next if ($count < 2);
2196: $error_text .= '<div class="LC_error">'.
2197: &mt('Error: Found the mapalias "[_1]" defined multiple times.',
2198: $mapalias).
2199: '</div><ul><li>'.$which.'</li></ul>';
2200: }
2201: &clear_mapalias_count();
2202: return $error_text;
2203: }
2204: sub clear_mapalias_count {
2205: undef(%mapalias_cache);
2206: }
2207: }
1.1 www 2208: 1;
2209: __END__
2210:
1.26 harris41 2211: =head1 NAME
2212:
2213: Apache::lonuserstate - Construct and maintain state and binary representation
2214: of course for user
2215:
2216: =head1 SYNOPSIS
2217:
2218: Invoked by lonroles.pm.
2219:
2220: &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
2221:
2222: =head1 INTRODUCTION
2223:
2224: This module constructs and maintains state and binary representation
2225: of course for user.
2226:
2227: This is part of the LearningOnline Network with CAPA project
2228: described at http://www.lon-capa.org.
2229:
1.129 jms 2230: =head1 SUBROUTINES
1.26 harris41 2231:
1.129 jms 2232: =over
1.26 harris41 2233:
1.129 jms 2234: =item loadmap()
1.26 harris41 2235:
1.129 jms 2236: Loads map from disk
1.26 harris41 2237:
1.129 jms 2238: =item simplify()
1.26 harris41 2239:
1.129 jms 2240: Simplify expression
1.26 harris41 2241:
1.129 jms 2242: =item traceroute()
1.26 harris41 2243:
1.129 jms 2244: Build condition hash
1.26 harris41 2245:
1.129 jms 2246: =item accinit()
1.26 harris41 2247:
1.129 jms 2248: Cascading conditions, quick access, parameters
1.26 harris41 2249:
1.129 jms 2250: =item readmap()
1.26 harris41 2251:
1.129 jms 2252: Read map and all submaps
1.1 www 2253:
1.129 jms 2254: =item evalstate()
1.1 www 2255:
1.129 jms 2256: Evaluate state string
1.1 www 2257:
1.26 harris41 2258: =back
1.1 www 2259:
1.26 harris41 2260: =cut
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