Annotation of rat/lonuserstate.pm, revision 1.149.2.5.2.3
1.1 www 1: # The LearningOnline Network with CAPA
2: # Construct and maintain state and binary representation of course for user
3: #
1.149.2.5.2.3! (raeburn 4:: # $Id: lonuserstate.pm,v 1.149.2.5.2.2 2022/05/29 12:35:02 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 $retfurl; # first URL
1.29 www 59: my %randompick; # randomly picked resources
1.51 www 60: my %randompickseed; # optional seed for randomly picking resources
1.124 albertel 61: my %randomorder; # maps to order contents randomly
1.146 raeburn 62: my %randomizationcode; # code used to grade folder for bubblesheet exam
1.73 www 63: my %encurl; # URLs in this folder are supposed to be encrypted
64: my %hiddenurl; # this URL (or complete folder) is supposed to be hidden
1.149.2.5.2.1 (raeburn 65:: my %deeplinkout; # this URL (or complete folder) unavailable in deep-link session
1.149.2.2 raeburn 66: my %rescount; # count of unhidden items in each map
67: my %mapcount; # count of unhidden maps in each map
1.61 www 68:
69: # ----------------------------------- Remove version from URL and store in hash
70:
1.134 www 71: sub versionerror {
72: my ($uri,$usedversion,$unusedversion)=@_;
73: return '<br />'.&mt('Version discrepancy: resource [_1] included in both version [_2] and version [_3]. Using version [_2].',
74: $uri,$usedversion,$unusedversion).'<br />';
75: }
76:
1.139 foxr 77: # Removes the version number from a URI and returns the resulting
78: # URI (e.g. mumbly.version.stuff => mumbly.stuff).
79: #
80: # If the URI has not been seen with a versio before the
81: # hash{'version_'.resultingURI} is set to the version number.
82: # If the URI has been seen and the version does not match and error
83: # is added to the error string.
84: #
85: # Parameters:
86: # URI potentially with a version.
87: # Returns:
88: # URI with the version cut out.
89: # See above for side effects.
90: #
91:
1.61 www 92: sub versiontrack {
93: my $uri=shift;
94: if ($uri=~/\.(\d+)\.\w+$/) {
95: my $version=$1;
96: $uri=~s/\.\d+\.(\w+)$/\.$1/;
1.62 www 97: unless ($hash{'version_'.$uri}) {
98: $hash{'version_'.$uri}=$version;
1.134 www 99: } elsif ($version!=$hash{'version_'.$uri}) {
100: $errtext.=&versionerror($uri,$hash{'version_'.$uri},$version);
101: }
1.61 www 102: }
103: return $uri;
104: }
105:
106: # -------------------------------------------------------------- Put in version
107:
108: sub putinversion {
109: my $uri=shift;
1.93 www 110: my $key=$env{'request.course.id'}.'_'.&Apache::lonnet::clutter($uri);
1.61 www 111: if ($hash{'version_'.$uri}) {
112: my $version=$hash{'version_'.$uri};
1.65 www 113: if ($version eq 'mostrecent') { return $uri; }
1.66 www 114: if ($version eq &Apache::lonnet::getversion(
115: &Apache::lonnet::filelocation('',$uri)))
116: { return $uri; }
1.61 www 117: $uri=~s/\.(\w+)$/\.$version\.$1/;
118: }
1.93 www 119: &Apache::lonnet::do_cache_new('courseresversion',$key,&Apache::lonnet::declutter($uri),600);
1.61 www 120: return $uri;
121: }
122:
123: # ----------------------------------------- Processing versions file for course
124:
125: sub processversionfile {
1.64 www 126: my %cenv=@_;
1.61 www 127: my %versions=&Apache::lonnet::dump('resourceversions',
128: $cenv{'domain'},
129: $cenv{'num'});
1.106 albertel 130: foreach my $ver (keys(%versions)) {
131: if ($ver=~/^error\:/) { return; }
132: $hash{'version_'.$ver}=$versions{$ver};
1.61 www 133: }
134: }
1.45 www 135:
1.138 foxr 136: # --------------------------------------------------------- Loads from disk
1.1 www 137:
1.140 foxr 138:
139: #
140: # Loads a map file.
141: # Note that this may implicitly recurse via parse_resource if one of the resources
142: # is itself composed.
143: #
144: # Parameters:
145: # uri - URI of the map file.
146: # parent_rid - Resource id in the map of the parent resource (0.0 for the top level map)
1.146 raeburn 147: # courseid - Course id for the course for which the map is being loaded
1.140 foxr 148: #
1.1 www 149: sub loadmap {
1.146 raeburn 150: my ($uri,$parent_rid,$courseid)=@_;
1.138 foxr 151:
152: # Is the map already included?
153:
1.114 www 154: if ($hash{'map_pc_'.$uri}) {
1.120 albertel 155: $errtext.='<p class="LC_error">'.
156: &mt('Multiple use of sequence/page [_1]! The course will not function properly.','<tt>'.$uri.'</tt>').
157: '</p>';
1.114 www 158: return;
159: }
1.138 foxr 160: # Register the resource in it's map_pc_ [for the URL]
161: # map_id.nnn is the nesting level -> to the URI.
162:
1.1 www 163: $pc++;
164: my $lpc=$pc;
165: $hash{'map_pc_'.$uri}=$lpc;
166: $hash{'map_id_'.$lpc}=$uri;
1.138 foxr 167:
168: # If the parent is of the form n.m hang this map underneath it in the
169: # map hierarchy.
170:
1.136 raeburn 171: if ($parent_rid =~ /^(\d+)\.\d+$/) {
172: my $parent_pc = $1;
173: if (defined($hash{'map_hierarchy_'.$parent_pc})) {
174: $hash{'map_hierarchy_'.$lpc}=$hash{'map_hierarchy_'.$parent_pc}.','.
175: $parent_pc;
176: } else {
177: $hash{'map_hierarchy_'.$lpc}=$parent_pc;
178: }
179: }
1.1 www 180:
1.138 foxr 181: # Determine and check filename of the sequence we need to read:
182:
1.62 www 183: my $fn=&Apache::lonnet::filelocation('',&putinversion($uri));
1.37 www 184:
185: my $ispage=($fn=~/\.page$/);
1.1 www 186:
1.138 foxr 187: # We can only nest sequences or pages. Anything else is an illegal nest.
188:
189: unless (($fn=~/\.sequence$/) || $ispage) {
1.147 raeburn 190: $errtext.='<br />'.&mt('Invalid map: [_1]',"<tt>$fn</tt>");
1.98 albertel 191: return;
1.1 www 192: }
193:
1.138 foxr 194: # Read the XML that constitutes the file.
195:
1.37 www 196: my $instr=&Apache::lonnet::getfile($fn);
197:
1.124 albertel 198: if ($instr eq -1) {
1.147 raeburn 199: $errtext.= '<br />'
200: .&mt('Map not loaded: The file [_1] does not exist.',
201: "<tt>$fn</tt>");
1.149.2.5.2.3! (raeburn 202:: $hash{'map_type_'.$lpc}='none';
! 203:: if (&is_advanced($courseid)) {
! 204:: $errtext .= &error_detail($parent_rid,$courseid,$ispage,$uri);
! 205:: }
1.124 albertel 206: return;
207: }
1.22 www 208:
1.138 foxr 209: # Successfully got file, parse it
210:
211: # parse for parameter processing.
212: # Note that these are <param... / > tags
213: # so we only care about 'S' (tag start) nodes.
214:
1.1 www 215:
1.124 albertel 216: my $parser = HTML::TokeParser->new(\$instr);
217: $parser->attr_encoded(1);
1.138 foxr 218:
1.124 albertel 219: # first get all parameters
1.138 foxr 220:
221:
1.124 albertel 222: while (my $token = $parser->get_token) {
223: next if ($token->[0] ne 'S');
224: if ($token->[1] eq 'param') {
225: &parse_param($token,$lpc);
226: }
227: }
1.138 foxr 228:
229: # Get set to take another pass through the XML:
230: # for resources and links.
231:
1.124 albertel 232: $parser = HTML::TokeParser->new(\$instr);
233: $parser->attr_encoded(1);
1.1 www 234:
1.124 albertel 235: my $linkpc=0;
1.1 www 236:
1.124 albertel 237: $fn=~/\.(\w+)$/;
1.1 www 238:
1.124 albertel 239: $hash{'map_type_'.$lpc}=$1;
1.1 www 240:
1.124 albertel 241: my $randomize = ($randomorder{$parent_rid} =~ /^yes$/i);
1.1 www 242:
1.138 foxr 243: # Parse the resources, link and condition tags.
244: # Note that if randomorder or random select is chosen the links and
245: # conditions are meaningless but are determined by the randomization.
246: # This is handled in the next chunk of code.
247:
1.124 albertel 248: my @map_ids;
1.146 raeburn 249: my $codechecked;
1.149.2.2 raeburn 250: $rescount{$lpc} = 0;
251: $mapcount{$lpc} = 0;
1.124 albertel 252: while (my $token = $parser->get_token) {
253: next if ($token->[0] ne 'S');
1.138 foxr 254:
255: # Resource
256:
1.124 albertel 257: if ($token->[1] eq 'resource') {
1.146 raeburn 258: my $resource_id = &parse_resource($token,$lpc,$ispage,$uri,$courseid);
1.138 foxr 259: if (defined $resource_id) {
1.146 raeburn 260: push(@map_ids, $resource_id);
1.149.2.2 raeburn 261: if ($hash{'src_'.$lpc.'.'.$resource_id}) {
262: $rescount{$lpc} ++;
263: if (($hash{'src_'.$lpc.'.'.$resource_id}=~/\.sequence$/) ||
264: ($hash{'src_'.$lpc.'.'.$resource_id}=~/\.page$/)) {
265: $mapcount{$lpc} ++;
266: }
267: }
1.146 raeburn 268: unless ($codechecked) {
269: my $startsymb =
270: &Apache::lonnet::encode_symb($hash{'map_id_'.$lpc},$resource_id,
271: $hash{'src_'."$lpc.$resource_id"});
272: my $code =
273: &Apache::lonnet::EXT('resource.0.examcode',$startsymb,undef,undef,
274: undef,undef,$courseid);
275: if ($code) {
276: $randomizationcode{$parent_rid} = $code;
277: }
278: $codechecked = 1;
279: }
1.138 foxr 280: }
281:
282: # Link
283:
1.124 albertel 284: } elsif ($token->[1] eq 'link' && !$randomize) {
285: &make_link(++$linkpc,$lpc,$token->[2]->{'to'},
286: $token->[2]->{'from'},
1.139 foxr 287: $token->[2]->{'condition'}); # note ..condition may be undefined.
1.138 foxr 288:
289: # condition
290:
1.124 albertel 291: } elsif ($token->[1] eq 'condition' && !$randomize) {
292: &parse_condition($token,$lpc);
293: }
294: }
1.146 raeburn 295: undef($codechecked);
1.1 www 296:
1.138 foxr 297: # Handle randomization and random selection
298:
1.124 albertel 299: if ($randomize) {
1.149.2.4 raeburn 300: unless (&is_advanced($courseid)) {
1.148 raeburn 301: # Order of resources is not randomized if user has and advanced role in the course.
1.124 albertel 302: my $seed;
1.139 foxr 303:
1.148 raeburn 304: # If the map's random seed parameter has been specified
305: # it is used as the basis for computing the seed ...
1.139 foxr 306:
1.124 albertel 307: if (defined($randompickseed{$parent_rid})) {
308: $seed = $randompickseed{$parent_rid};
309: } else {
1.139 foxr 310:
311: # Otherwise the parent's fully encoded symb is used.
312:
1.124 albertel 313: my ($mapid,$resid)=split(/\./,$parent_rid);
314: my $symb=
315: &Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},
316: $resid,$hash{'src_'.$parent_rid});
1.85 albertel 317:
1.124 albertel 318: $seed = $symb;
319: }
1.138 foxr 320:
1.139 foxr 321: # TODO: Here for sure we need to pass along the username/domain
1.138 foxr 322: # so that we can impersonate users in lonprintout e.g.
323:
1.146 raeburn 324: my $setcode;
325: if (defined($randomizationcode{$parent_rid})) {
326: if ($env{'form.CODE'} eq '') {
327: $env{'form.CODE'} = $randomizationcode{$parent_rid};
328: $setcode = 1;
329: }
330: }
331:
1.124 albertel 332: my $rndseed=&Apache::lonnet::rndseed($seed);
333: &Apache::lonnet::setup_random_from_rndseed($rndseed);
1.140 foxr 334:
1.146 raeburn 335: if ($setcode) {
336: undef($env{'form.CODE'});
337: undef($setcode);
338: }
339:
1.140 foxr 340: # Take the set of map ids we have decoded and permute them to a
341: # random order based on the seed set above. All of this is
342: # processing the randomorder parameter if it is set, not
343: # randompick.
344:
1.148 raeburn 345: @map_ids=&Math::Random::random_permutation(@map_ids);
1.124 albertel 346: }
1.139 foxr 347:
1.124 albertel 348: my $from = shift(@map_ids);
349: my $from_rid = $lpc.'.'.$from;
350: $hash{'map_start_'.$uri} = $from_rid;
351: $hash{'type_'.$from_rid}='start';
352:
1.140 foxr 353: # Create links to reflect the random re-ordering done above.
354: # In the code to process the map XML, we did not process links or conditions
355: # if randomorder was set. This means that for an instructor to choose
1.139 foxr 356:
1.124 albertel 357: while (my $to = shift(@map_ids)) {
358: &make_link(++$linkpc,$lpc,$to,$from);
359: my $to_rid = $lpc.'.'.$to;
360: $hash{'type_'.$to_rid}='normal';
361: $from = $to;
362: $from_rid = $to_rid;
363: }
1.1 www 364:
1.124 albertel 365: $hash{'map_finish_'.$uri}= $from_rid;
366: $hash{'type_'.$from_rid}='finish';
1.1 www 367: }
1.121 albertel 368:
1.127 albertel 369: $parser = HTML::TokeParser->new(\$instr);
1.121 albertel 370: $parser->attr_encoded(1);
1.139 foxr 371:
1.149.2.2 raeburn 372: # last parse out the mapalias params. These provide mnemonic
1.140 foxr 373: # tags to resources that can be used in conditions
1.139 foxr 374:
1.121 albertel 375: while (my $token = $parser->get_token) {
376: next if ($token->[0] ne 'S');
377: if ($token->[1] eq 'param') {
378: &parse_mapalias_param($token,$lpc);
379: }
380: }
381: }
382:
1.149.2.4 raeburn 383: sub is_advanced {
384: my ($courseid) = @_;
385: my $advanced;
386: if ($env{'request.course.id'}) {
387: $advanced = (&Apache::lonnet::allowed('adv') eq 'F');
388: } else {
389: $env{'request.course.id'} = $courseid;
390: $advanced = (&Apache::lonnet::allowed('adv') eq 'F');
391: $env{'request.course.id'} = '';
392: }
393: return $advanced;
394: }
1.124 albertel 395:
1.149.2.5.2.3! (raeburn 396:: sub error_detail {
! 397:: my ($parent_rid,$courseid,$ispage,$uri) = @_;
! 398:: my $errinfo;
! 399:: if ($courseid) {
! 400:: my $courseurl = &Apache::lonnet::courseid_to_courseurl($courseid);
! 401:: if ($parent_rid =~ /^(\d+)\.(\d+)$/) {
! 402:: my ($parent_pc,$parent_id) = ($1,$2);
! 403:: my ($parent_type,$published,$uploaded,$canedit,$role,$switchserver,$audom,$auname,
! 404:: $editfile,$filerole,$fileswitch,$audomfile,$aunamefile);
! 405:: if (($parent_pc eq '0') && ($hash{'map_id_1'} =~ m{^/res/($match_domain)/($match_username)/.+\.(sequence|page)$})) {
! 406:: ($audomfile,$aunamefile) = ($1,$2);
! 407:: ($editfile,$filerole,$fileswitch) = &canedit_published($audomfile,$aunamefile);
! 408:: $errinfo = &mt('Top level published sequence file is missing.');
! 409:: } else {
! 410:: if ($parent_pc eq '1') {
! 411:: if ($hash{'map_id_1'} eq "/uploaded$courseurl/default.sequence") {
! 412:: $uploaded = 1;
! 413:: if (&Apache::lonnet::allowed('mdc',$courseid)) {
! 414:: $canedit = 1;
! 415:: }
! 416:: $errinfo = &mt('Map is referenced in the top level ([_1]Main Content[_2]) folder.',
! 417:: '<span class="LC_cusr_emph">','</span>');
! 418:: } elsif ($hash{'map_id_1'} =~ m{^/res/($match_domain)/($match_username)/.+\.(sequence|page)$}) {
! 419:: ($audom,$auname) = ($1,$2);
! 420:: ($canedit,$role,$switchserver) = &canedit_published($audom,$auname);
! 421:: $published = 1;
! 422:: $errinfo = &mt('Map is referenced in the top level published sequence file.');
! 423:: }
! 424:: } else {
! 425:: if ($hash{'map_id_'.$parent_pc} =~ m{^\Q/uploaded$courseurl/default_\E\d+\.(sequence|page)$}) {
! 426:: $uploaded = 1;
! 427:: if (&Apache::lonnet::allowed('mdc',$courseid)) {
! 428:: $canedit = 1;
! 429:: }
! 430:: } elsif ($hash{'map_id_'.$parent_pc} =~ m{^/res/($match_domain)/($match_username)/.+\.(sequence|page)$}) {
! 431:: ($audom,$auname) = ($1,$2);
! 432:: ($canedit,$role,$switchserver) = &canedit_published($audom,$auname);
! 433:: $published = 1;
! 434:: }
! 435:: if (exists($hash{'ids_'.$hash{'map_id_'.$parent_pc}})) {
! 436:: $parent_type = $hash{'map_type_'.$parent_pc};
! 437:: if ($published) {
! 438:: $errinfo = &mt("Map is referenced in the published $parent_type file: [_1].",
! 439:: '<span class="LC_cusr_emph">'.$hash{'map_id_'.$parent_pc}.'</span>');
! 440:: } else {
! 441:: my $title = $hash{'title_'.$hash{'ids_'.$hash{'map_id_'.$parent_pc}}};
! 442:: if ($title ne '') {
! 443:: my $mapdesc;
! 444:: if ($parent_type eq 'sequence') {
! 445:: $mapdesc = 'folder';
! 446:: } else {
! 447:: $mapdesc = 'composite page';
! 448:: }
! 449:: $errinfo = &mt("Map is referenced in the $mapdesc named: [_1].",
! 450:: '<span class="LC_cusr_emph">'.$title.'</span>');
! 451:: }
! 452:: my @containers = split(/,/,$hash{'map_hierarchy_'.$parent_pc});
! 453:: shift(@containers);
! 454:: my $folderpath;
! 455:: foreach my $id (@containers) {
! 456:: my $name;
! 457:: if ($id == 1) {
! 458:: $name = &mt('Main Content');
! 459:: } elsif ($hash{'title_'.$hash{'ids_'.$hash{'map_id_'.$id}}} ne '') {
! 460:: $name = $hash{'title_'.$hash{'ids_'.$hash{'map_id_'.$id}}};
! 461:: }
! 462:: if ($name ne '') {
! 463:: $folderpath .= $name.' » ';
! 464:: }
! 465:: }
! 466:: if ($title eq '') {
! 467:: $folderpath =~ s/\Q » \E$//;
! 468:: } else {
! 469:: $folderpath .= $title;
! 470:: }
! 471:: if ($folderpath) {
! 472:: $errinfo .= '<br />'.&mt('Hierarchy is: [_1]',
! 473:: '<span class="LC_cusr_emph">'.$folderpath.'</span>');
! 474:: }
! 475:: }
! 476:: }
! 477:: }
! 478:: if ($uri =~ m{^/res/($match_domain)/($match_username)/.+\.(sequence|page)$}) {
! 479:: ($audomfile,$aunamefile) = ($1,$2);
! 480:: ($editfile,$filerole,$fileswitch) = &canedit_published($audomfile,$aunamefile);
! 481:: }
! 482:: }
! 483:: if ($errinfo) {
! 484:: $errinfo = '<br />'.$errinfo.'<br />';
! 485:: }
! 486:: if ($editfile) {
! 487:: if ($errinfo ne '') {
! 488:: $errinfo .= '<br />';
! 489:: }
! 490:: if ($canedit) {
! 491:: $errinfo .= &mt('One way to rectify this problem is to create and publish the missing file');
! 492:: } else {
! 493:: $errinfo .= &mt('To rectify this problem, create and publish the missing file');
! 494:: }
! 495:: my $fileurl = $uri;
! 496:: $fileurl =~s{^/res/}{/priv/};
! 497:: if ($fileswitch) {
! 498:: my $rolename = &Apache::lonnet::plaintext($filerole);
! 499:: my $rolecode;
! 500:: if ($filerole eq 'au') {
! 501:: $rolecode = 'au./'.$audomfile.'/';
! 502:: } else {
! 503:: $rolecode = $filerole.'./'.$audomfile.'/'.$aunamefile;
! 504:: }
! 505:: $errinfo .= '.<br />'.&mt('You will need to [_1]switch server[_2].',
! 506:: '<a href="/adm/switchserver?otherserver='.$switchserver.'&role='.$rolecode.
! 507:: '&origurl='.&escape($fileurl).'">','</a>');
! 508:: } else {
! 509:: &js_escape(\$fileurl);
! 510:: $errinfo .= ': <a href="javascript:go('."'$fileurl'".');">'.&mt('Create the missing file').'</a>';
! 511:: }
! 512:: }
! 513:: if ($canedit) {
! 514:: if ($errinfo ne '') {
! 515:: $errinfo .= '<br />';
! 516:: }
! 517:: if ($published) {
! 518:: my $rolename = &Apache::lonnet::plaintext($role);
! 519:: my $rolecode;
! 520:: if ($role eq 'au') {
! 521:: $rolecode = 'au./'.$audom.'/';
! 522:: } else {
! 523:: $rolecode = $role.'./'.$audom.'/'.$auname;
! 524:: }
! 525:: if ($editfile) {
! 526:: $errinfo .= &mt('Another way is to edit the parent map to remove the reference to the missing file');
! 527:: } else {
! 528:: $errinfo .= &mt('To rectify this problem edit the parent map to remove the reference to the missing file');
! 529:: }
! 530:: my $mapurl = $hash{'map_id_'.$parent_pc};
! 531:: $mapurl =~s{^/res/}{/priv/};
! 532:: if ($switchserver) {
! 533:: $errinfo .= '.<br />'.
! 534:: &mt('You will need to [_1]switch server[_2].',
! 535:: '<a href="/adm/switchserver?otherserver='.$switchserver.'&role='.$rolecode.
! 536:: '&origurl='.&escape($mapurl).'">','</a>');
! 537:: } else {
! 538:: &js_escape(\$mapurl);
! 539:: $errinfo .= ': <a href="javascript:go('."'$mapurl'".');">'.&mt('Edit the map').'</a>';
! 540:: }
! 541:: } elsif ($uploaded && $courseid) {
! 542:: my ($dest,$linktext);
! 543:: my $crstype = &Apache::loncommon::course_type($courseid);
! 544:: if ($parent_pc eq '1') {
! 545:: $dest = '/adm/coursedocs?folderpath='.&escape('default&Main%20Content:::::');
! 546:: $linktext = &mt('Edit Folder');
! 547:: } elsif ($hash{'ids_'.$hash{'map_id_'.$parent_pc}} =~ /^(\d+)\.(\d+)$/) {
! 548:: my ($editmap,$editidx) = ($1,$2);
! 549:: my $symb = &Apache::lonnet::encode_symb($hash{'map_id_'.$editmap},
! 550:: $editidx,$hash{'map_id_'.$parent_pc});
! 551:: $dest = '/adm/coursedocs?command=directnav&symb='.&escape($symb);
! 552:: if ($parent_type eq 'sequence') {
! 553:: $linktext = &mt('Edit Folder');
! 554:: } else {
! 555:: $linktext = &mt('Edit Composite Page');
! 556:: }
! 557:: } else {
! 558:: $dest = '/adm/coursedocs?folderpath='.&escape('default&Main%20Content:::::');
! 559:: $linktext = &mt("Edit $crstype");
! 560:: }
! 561:: if ($editfile) {
! 562:: $errinfo .= &mt("Another way is to use the $crstype Editor to delete the reference to the missing file");
! 563:: } else {
! 564:: $errinfo .= &mt("To rectify this problem use the $crstype Editor to delete the reference to the missing file");
! 565:: }
! 566:: $errinfo .= ': <a href="javascript:go('."'$dest'".');">'.$linktext.'</a>';
! 567:: }
! 568:: $errinfo .= '<br />';
! 569:: }
! 570:: }
! 571:: }
! 572:: return $errinfo;
! 573:: }
! 574::
! 575:: sub canedit_published {
! 576:: my ($audom,$auname) = @_;
! 577:: my ($canedit,$role,$switchserver);
! 578:: my $now = time;
! 579:: if (($auname eq $env{'user.name'}) && ($audom eq $env{'user.domain'})) {
! 580:: if (exists($env{"user.role.au./$audom/"})) {
! 581:: my ($start,$end) = split(/\./,$env{"user.role.au./$audom/"});
! 582:: unless (($end && $end < $now) || ($start && $start > $now)) {
! 583:: $canedit = 1;
! 584:: $role = 'au';
! 585:: }
! 586:: }
! 587:: }
! 588:: unless ($canedit) {
! 589:: foreach my $possrole ('ca','aa') {
! 590:: if (exists($env{"user.role.$possrole./$audom/$auname"})) {
! 591:: my ($end,$start) = split(/\./,$env{"user.role.$possrole./$audom/$auname"});
! 592:: unless (($end && $end < time) || ($start && $start > time)) {
! 593:: $canedit = 1;
! 594:: $role = $possrole;
! 595:: last;
! 596:: }
! 597:: }
! 598:: }
! 599:: }
! 600:: if ($canedit) {
! 601:: my $auhome = &Apache::lonnet::homeserver($auname,$audom);
! 602:: my @ids=&Apache::lonnet::current_machine_ids();
! 603:: if (($auhome ne 'no_host') && (!grep(/^\Q$auhome\E$/,@ids))) {
! 604:: $switchserver = $auhome;
! 605:: }
! 606:: }
! 607:: return ($canedit,$role,$switchserver);
! 608:: }
! 609::
1.124 albertel 610: # -------------------------------------------------------------------- Resource
1.138 foxr 611: #
612: # Parses a resource tag to produce the value to push into the
613: # map_ids array.
614: #
615: #
616: # Information about the actual type of resource is provided by the file extension
617: # of the uri (e.g. .problem, .sequence etc. etc.).
618: #
619: # Parameters:
620: # $token - A token from HTML::TokeParser
621: # This is an array that describes the most recently parsed HTML item.
622: # $lpc - Map nesting level (?)
623: # $ispage - True if this resource is encapsulated in a .page (assembled resourcde).
624: # $uri - URI of the enclosing resource.
1.146 raeburn 625: # $courseid - Course id of the course containing the resource being parsed.
1.138 foxr 626: # Returns:
1.139 foxr 627: # Value of the id attribute of the tag.
1.138 foxr 628: #
629: # Note:
630: # The token is an array that contains the following elements:
631: # [0] => 'S' indicating this is a start token
632: # [1] => 'resource' indicating this tag is a <resource> tag.
633: # [2] => Hash of attribute =>value pairs.
634: # [3] => @(keys [2]).
635: # [4] => unused.
636: #
637: # The attributes of the resourcde tag include:
638: #
639: # id - The resource id.
640: # src - The URI of the resource.
641: # type - The resource type (e.g. start and finish).
642: # title - The resource title.
643:
644:
1.124 albertel 645: sub parse_resource {
1.146 raeburn 646: my ($token,$lpc,$ispage,$uri,$courseid) = @_;
1.138 foxr 647:
1.139 foxr 648: # I refuse to countenance code like this that has
1.138 foxr 649: # such a dirty side effect (and forcing this sub to be called within a loop).
650: #
651: # if ($token->[2]->{'type'} eq 'zombie') { next; }
1.139 foxr 652: #
653: # The original code both returns _and_ skips to the next pass of the >caller's<
654: # loop, that's just dirty.
655: #
1.138 foxr 656:
657: # Zombie resources don't produce anything useful.
658:
659: if ($token->[2]->{'type'} eq 'zombie') {
660: return undef;
661: }
662:
1.139 foxr 663: my $rid=$lpc.'.'.$token->[2]->{'id'}; # Resource id in hash is levelcounter.id-in-xml.
664:
665: # Save the hash element type and title:
1.124 albertel 666:
667: $hash{'kind_'.$rid}='res';
668: $hash{'title_'.$rid}=$token->[2]->{'title'};
1.139 foxr 669:
670: # Get the version free URI for the resource.
671: # If a 'version' attribute was supplied, and this resource's version
672: # information has not yet been stored, store it.
673: #
674:
1.124 albertel 675: my $turi=&versiontrack($token->[2]->{'src'});
676: if ($token->[2]->{'version'}) {
677: unless ($hash{'version_'.$turi}) {
678: $hash{'version_'.$turi}=$1;
679: }
680: }
1.139 foxr 681: # Pull out the title and do entity substitution on &colon
682: # Q: Why no other entity substitutions?
683:
1.124 albertel 684: my $title=$token->[2]->{'title'};
685: $title=~s/\&colon\;/\:/gs;
1.139 foxr 686:
687:
688:
689: # I think the point of all this code is to construct a final
690: # URI that apache and its rewrite rules can use to
691: # fetch the resource. Thi s sonly necessary if the resource
692: # is not a page. If the resource is a page then it must be
693: # assembled (at fetch time?).
694:
1.149.2.3 raeburn 695: if ($ispage) {
696: if ($token->[2]->{'external'} eq 'true') { # external
697: $turi=~s{^http\://}{/ext/};
698: }
699: } else {
1.124 albertel 700: $turi=~/\.(\w+)$/;
701: my $embstyle=&Apache::loncommon::fileembstyle($1);
702: if ($token->[2]->{'external'} eq 'true') { # external
1.130 raeburn 703: $turi=~s/^https?\:\/\//\/adm\/wrapper\/ext\//;
1.124 albertel 704: } elsif ($turi=~/^\/*uploaded\//) { # uploaded
705: if (($embstyle eq 'img')
706: || ($embstyle eq 'emb')
707: || ($embstyle eq 'wrp')) {
708: $turi='/adm/wrapper'.$turi;
709: } elsif ($embstyle eq 'ssi') {
710: #do nothing with these
711: } elsif ($turi!~/\.(sequence|page)$/) {
712: $turi='/adm/coursedocs/showdoc'.$turi;
713: }
1.149.2.5.2.1 (raeburn 714:: } elsif ($turi=~ m{^/adm/$match_domain/$match_courseid/\d+/ext\.tool$}) {
715:: $turi='/adm/wrapper'.$turi;
1.124 albertel 716: } elsif ($turi=~/\S/) { # normal non-empty internal resource
717: my $mapdir=$uri;
718: $mapdir=~s/[^\/]+$//;
719: $turi=&Apache::lonnet::hreflocation($mapdir,$turi);
720: if (($embstyle eq 'img')
721: || ($embstyle eq 'emb')
722: || ($embstyle eq 'wrp')) {
723: $turi='/adm/wrapper'.$turi;
724: }
725: }
726: }
1.139 foxr 727: # Store reverse lookup, remove query string resource 'ids'_uri => resource id.
728: # If the URI appears more than one time in the sequence, it's resourcde
729: # id's are constructed as a comma spearated list.
730:
1.124 albertel 731: my $idsuri=$turi;
732: $idsuri=~s/\?.+$//;
733: if (defined($hash{'ids_'.$idsuri})) {
734: $hash{'ids_'.$idsuri}.=','.$rid;
735: } else {
736: $hash{'ids_'.$idsuri}=''.$rid;
737: }
738:
1.139 foxr 739:
740:
1.135 raeburn 741: if ($turi=~/\/(syllabus|aboutme|navmaps|smppg|bulletinboard|viewclasslist)$/) {
1.124 albertel 742: $turi.='?register=1';
743: }
744:
1.139 foxr 745:
746: # resource id lookup: 'src'_resourc-di => URI decorated with a query
747: # parameter as above if necessary due to the resource type.
748:
1.124 albertel 749: $hash{'src_'.$rid}=$turi;
1.139 foxr 750:
751: # Mark the external-ness of the resource:
1.124 albertel 752:
753: if ($token->[2]->{'external'} eq 'true') {
754: $hash{'ext_'.$rid}='true:';
755: } else {
756: $hash{'ext_'.$rid}='false:';
757: }
1.139 foxr 758:
759: # If the resource is a start/finish resource set those
760: # entries in the has so that navigation knows where everything starts.
761: # TODO? If there is a malformed sequence that has no start or no finish
762: # resource, should this be detected and errors thrown? How would such a
763: # resource come into being other than being manually constructed by a person
764: # and then uploaded? Could that happen if an author decided a sequence was almost
765: # right edited it by hand and then reuploaded it to 'fix it' but accidently cut the
766: # start or finish resources?
767: #
768: # All resourcess also get a type_id => (start | finish | normal) hash entr.
769: #
1.124 albertel 770: if ($token->[2]->{'type'}) {
771: $hash{'type_'.$rid}=$token->[2]->{'type'};
772: if ($token->[2]->{'type'} eq 'start') {
773: $hash{'map_start_'.$uri}="$rid";
774: }
775: if ($token->[2]->{'type'} eq 'finish') {
776: $hash{'map_finish_'.$uri}="$rid";
777: }
778: } else {
779: $hash{'type_'.$rid}='normal';
780: }
1.139 foxr 781:
782: # Sequences end pages are constructed entities. They require that the
783: # map that defines _them_ be loaded as well into the hash...with this resourcde
784: # as the base of the nesting.
785: # Resources like that are also marked with is_map_id => 1 entries.
786: #
1.124 albertel 787:
788: if (($turi=~/\.sequence$/) ||
789: ($turi=~/\.page$/)) {
790: $hash{'is_map_'.$rid}=1;
1.149.2.4 raeburn 791: if ((!$hiddenurl{$rid}) || (&is_advanced($courseid))) {
792: &loadmap($turi,$rid,$courseid);
793: }
1.124 albertel 794: }
795: return $token->[2]->{'id'};
796: }
797:
1.139 foxr 798: #-------------------------------------------------------------------- link
799: # Links define how you are allowed to move from one resource to another.
800: # They are the transition edges in the directed graph that a map is.
801: # This sub takes informatino from a <link> tag and constructs the
802: # navigation bits and pieces of a map. There is no requirement that the
803: # resources that are linke are already defined, however clearly the map is
804: # badly broken if they are not _eventually_ defined.
805: #
806: # Note that links can be unconditional or conditional.
807: #
808: # Parameters:
809: # linkpc - The link counter for this level of map nesting (this is
810: # reset to zero by loadmap prior to starting to process
811: # links for map).
812: # lpc - The map level ocounter (how deeply nested this map is in
813: # the hierarchy of maps that are recursively read in.
814: # to - resource id (within the XML) of the target of the edge.
815: # from - resource id (within the XML) of the source of the edge.
816: # condition- id of condition associated with the edge (also within the XML).
817: #
818:
1.124 albertel 819: sub make_link {
820: my ($linkpc,$lpc,$to,$from,$condition) = @_;
821:
1.139 foxr 822: # Compute fully qualified ids for the link, the
823: # and from/to by prepending lpc.
824: #
825:
1.124 albertel 826: my $linkid=$lpc.'.'.$linkpc;
827: my $goesto=$lpc.'.'.$to;
828: my $comesfrom=$lpc.'.'.$from;
829: my $undercond=0;
830:
1.139 foxr 831:
832: # If there is a condition, qualify it with the level counter.
833:
1.124 albertel 834: if ($condition) {
835: $undercond=$lpc.'.'.$condition;
836: }
837:
1.139 foxr 838: # Links are represnted by:
839: # goesto_.fuullyqualifedlinkid => fully qualified to
840: # comesfrom.fullyqualifiedlinkid => fully qualified from
841: # undercond_.fullyqualifiedlinkid => fully qualified condition id.
842:
1.124 albertel 843: $hash{'goesto_'.$linkid}=$goesto;
844: $hash{'comesfrom_'.$linkid}=$comesfrom;
845: $hash{'undercond_'.$linkid}=$undercond;
846:
1.139 foxr 847: # In addition:
848: # to_.fully qualified from => comma separated list of
849: # link ids with that from.
850: # Similarly:
851: # from_.fully qualified to => comma separated list of link ids`
852: # with that to.
853: # That allows us given a resource id to know all edges that go to it
854: # and leave from it.
855: #
856:
1.124 albertel 857: if (defined($hash{'to_'.$comesfrom})) {
858: $hash{'to_'.$comesfrom}.=','.$linkid;
859: } else {
860: $hash{'to_'.$comesfrom}=''.$linkid;
861: }
862: if (defined($hash{'from_'.$goesto})) {
863: $hash{'from_'.$goesto}.=','.$linkid;
864: } else {
865: $hash{'from_'.$goesto}=''.$linkid;
866: }
867: }
868:
869: # ------------------------------------------------------------------- Condition
1.139 foxr 870: #
871: # Processes <condition> tags, storing sufficient information about them
872: # in the hash so that they can be evaluated and used to conditionalize
873: # what is presented to the student.
874: #
875: # these can have the following attributes
876: #
877: # id = A unique identifier of the condition within the map.
878: #
879: # value = Is a perl script-let that, when evaluated in safe space
880: # determines whether or not the condition is true.
881: # Normally this takes the form of a test on an Apache::lonnet::EXT call
882: # to find the value of variable associated with a resource in the
883: # map identified by a mapalias.
884: # Here's a fragment of XML code that illustrates this:
885: #
886: # <param to="5" value="mainproblem" name="parameter_0_mapalias" type="string" />
887: # <resource src="" id="1" type="start" title="Start" />
888: # <resource src="/res/msu/albertel/b_and_c/p1.problem" id="5" title="p1.problem" />
889: # <condition value="&EXT('user.resource.resource.0.tries','mainproblem')
890: # <2 " id="61" type="stop" />
891: # <link to="5" index="1" from="1" condition="61" />
892: #
893: # In this fragment:
894: # - The param tag establishes an alias to resource id 5 of 'mainproblem'.
895: # - The resource that is the start of the map is identified.
896: # - The resource tag identifies the resource associated with this tag
897: # and gives it the id 5.
898: # - The condition is true if the tries variable associated with mainproblem
899: # is less than 2 (that is the user has had more than 2 tries).
900: # The condition type is a stop condition which inhibits(?) the associated
901: # link if the condition is false.
902: # - The link to resource 5 from resource 1 is affected by this condition.
903: #
904: # type = Type of the condition. The type determines how the condition affects the
905: # link associated with it and is one of
906: # - 'force'
907: # - 'stop'
908: # anything else including not supplied..which treated as:
909: # - 'normal'.
910: # Presumably maps get created by the resource assembly tool and therefore
911: # illegal type values won't squirm their way into the XML.
912: #
913: # Side effects:
914: # - The kind_level-qualified-condition-id hash element is set to 'cond'.
915: # - The condition text is pushed into the cond array and its element number is
916: # set in the condid_level-qualified-condition-id element of the hash.
917: # - The condition type is colon appneded to the cond array element for this condition.
1.124 albertel 918: sub parse_condition {
919: my ($token,$lpc) = @_;
920: my $rid=$lpc.'.'.$token->[2]->{'id'};
921:
922: $hash{'kind_'.$rid}='cond';
923:
924: my $condition = $token->[2]->{'value'};
925: $condition =~ s/[\n\r]+/ /gs;
926: push(@cond, $condition);
927: $hash{'condid_'.$rid}=$#cond;
928: if ($token->[2]->{'type'}) {
929: $cond[$#cond].=':'.$token->[2]->{'type'};
930: } else {
931: $cond[$#cond].=':normal';
932: }
933: }
934:
935: # ------------------------------------------------------------------- Parameter
1.138 foxr 936: # Parse a <parameter> tag in the map.
937: # Parmameters:
938: # $token Token array for a start tag from HTML::TokeParser
939: # [0] = 'S'
940: # [1] = tagname ("param")
941: # [2] = Hash of {attribute} = values.
942: # [3] = Array of the keys in [2].
943: # [4] = unused.
944: # $lpc Current map nesting level.a
945: #
946: # Typical attributes:
947: # to=n - Number of the resource the parameter applies to.
948: # type=xx - Type of parameter value (e.g. string_yesno or int_pos).
1.149.2.2 raeburn 949: # name=xxx - Name of parameter (e.g. parameter_randompick or parameter_randomorder).
1.138 foxr 950: # value=xxx - value of the parameter.
1.124 albertel 951:
952: sub parse_param {
953: my ($token,$lpc) = @_;
1.138 foxr 954: my $referid=$lpc.'.'.$token->[2]->{'to'}; # Resource param applies to.
955: my $name=$token->[2]->{'name'}; # Name of parameter
1.124 albertel 956: my $part;
1.138 foxr 957:
958:
959: if ($name=~/^parameter_(.*)_/) {
1.124 albertel 960: $part=$1;
961: } else {
962: $part=0;
963: }
1.138 foxr 964:
965: # Peel the parameter_ off the parameter name.
966:
1.124 albertel 967: $name=~s/^.*_([^_]*)$/$1/;
1.138 foxr 968:
969: # The value is:
970: # type.part.name.value
971:
1.124 albertel 972: my $newparam=
973: &escape($token->[2]->{'type'}).':'.
974: &escape($part.'.'.$name).'='.
975: &escape($token->[2]->{'value'});
1.138 foxr 976:
977: # The hash key is param_resourceid.
978: # Multiple parameters for a single resource are & separated in the hash.
979:
980:
1.124 albertel 981: if (defined($hash{'param_'.$referid})) {
982: $hash{'param_'.$referid}.='&'.$newparam;
983: } else {
984: $hash{'param_'.$referid}=''.$newparam;
985: }
1.138 foxr 986: #
987: # These parameters have to do with randomly selecting
988: # resources, therefore a separate hash is also created to
989: # make it easy to locate them when actually computing the resource set later on
990: # See the code conditionalized by ($randomize) in loadmap().
991:
992: if ($token->[2]->{'name'}=~/^parameter_(0_)*randompick$/) { # Random selection turned on
1.124 albertel 993: $randompick{$referid}=$token->[2]->{'value'};
994: }
1.138 foxr 995: if ($token->[2]->{'name'}=~/^parameter_(0_)*randompickseed$/) { # Randomseed provided.
1.124 albertel 996: $randompickseed{$referid}=$token->[2]->{'value'};
997: }
1.138 foxr 998: if ($token->[2]->{'name'}=~/^parameter_(0_)*randomorder$/) { # Random order turned on.
1.124 albertel 999: $randomorder{$referid}=$token->[2]->{'value'};
1000: }
1.138 foxr 1001:
1002: # These parameters have to do with how the URLs of resources are presented to
1003: # course members(?). encrypturl presents encypted url's while
1004: # hiddenresource hides the URL.
1005: #
1006:
1.124 albertel 1007: if ($token->[2]->{'name'}=~/^parameter_(0_)*encrypturl$/) {
1008: if ($token->[2]->{'value'}=~/^yes$/i) {
1009: $encurl{$referid}=1;
1010: }
1011: }
1012: if ($token->[2]->{'name'}=~/^parameter_(0_)*hiddenresource$/) {
1013: if ($token->[2]->{'value'}=~/^yes$/i) {
1014: $hiddenurl{$referid}=1;
1015: }
1016: }
1017: }
1.140 foxr 1018: #
1019: # Parse mapalias parameters.
1020: # these are tags of the form:
1021: # <param to="nn"
1022: # value="some-alias-for-resourceid-nn"
1023: # name="parameter_0_mapalias"
1024: # type="string" />
1025: # A map alias is a textual name for a resource:
1026: # - The to attribute identifies the resource (this gets level qualified below)
1027: # - The value attributes provides the alias string.
1028: # - name must be of the regexp form: /^parameter_(0_)*mapalias$/
1029: # - e.g. the string 'parameter_' followed by 0 or more "0_" strings
1030: # terminating with the string 'mapalias'.
1031: # Examples:
1032: # 'parameter_mapalias', 'parameter_0_mapalias', parameter_0_0_mapalias'
1033: # Invalid to ids are silently ignored.
1034: #
1035: # Parameters:
1036: # token - The token array fromthe HMTML::TokeParser
1037: # lpc - The current map level counter.
1038: #
1.121 albertel 1039: sub parse_mapalias_param {
1040: my ($token,$lpc) = @_;
1.140 foxr 1041:
1042: # Fully qualify the to value and ignore the alias if there is no
1043: # corresponding resource.
1044:
1.121 albertel 1045: my $referid=$lpc.'.'.$token->[2]->{'to'};
1046: return if (!exists($hash{'src_'.$referid}));
1047:
1.140 foxr 1048: # If this is a valid mapalias parameter,
1049: # Append the target id to the count_mapalias element for that
1050: # alias so that we can detect doubly defined aliases
1051: # e.g.:
1052: # <param to="1" value="george" name="parameter_0_mapalias" type="string" />
1053: # <param to="2" value="george" name="parameter_0_mapalias" type="string" />
1054: #
1055: # The example above is trivial but the case that's important has to do with
1056: # constructing a map that includes a nested map where the nested map may have
1057: # aliases that conflict with aliases established in the enclosing map.
1058: #
1059: # ...and create/update the hash mapalias entry to actually store the alias.
1060: #
1061:
1.121 albertel 1062: if ($token->[2]->{'name'}=~/^parameter_(0_)*mapalias$/) {
1.122 albertel 1063: &count_mapalias($token->[2]->{'value'},$referid);
1.121 albertel 1064: $hash{'mapalias_'.$token->[2]->{'value'}}=$referid;
1065: }
1.1 www 1066: }
1067:
1.3 www 1068: # --------------------------------------------------------- Simplify expression
1069:
1.140 foxr 1070:
1071: #
1072: # Someone should really comment this to describe what it does to what and why.
1073: #
1.3 www 1074: sub simplify {
1.85 albertel 1075: my $expression=shift;
1.101 albertel 1076: # (0&1) = 1
1.105 albertel 1077: $expression=~s/\(0\&([_\.\d]+)\)/$1/g;
1.3 www 1078: # (8)=8
1.105 albertel 1079: $expression=~s/\(([_\.\d]+)\)/$1/g;
1.3 www 1080: # 8&8=8
1.105 albertel 1081: $expression=~s/([^_\.\d])([_\.\d]+)\&\2([^_\.\d])/$1$2$3/g;
1.3 www 1082: # 8|8=8
1.141 raeburn 1083: $expression=~s/([^_\.\d])([_\.\d]+)(?:\|\2)+([^_\.\d])/$1$2$3/g;
1.3 www 1084: # (5&3)&4=5&3&4
1.105 albertel 1085: $expression=~s/\(([_\.\d]+)((?:\&[_\.\d]+)+)\)\&([_\.\d]+[^_\.\d])/$1$2\&$3/g;
1.3 www 1086: # (((5&3)|(4&6)))=((5&3)|(4&6))
1.105 albertel 1087: $expression=~
1088: s/\((\(\([_\.\d]+(?:\&[_\.\d]+)*\)(?:\|\([_\.\d]+(?:\&[_\.\d]+)*\))+\))\)/$1/g;
1.3 www 1089: # ((5&3)|(4&6))|(1&2)=(5&3)|(4&6)|(1&2)
1.85 albertel 1090: $expression=~
1.105 albertel 1091: s/\((\([_\.\d]+(?:\&[_\.\d]+)*\))((?:\|\([_\.\d]+(?:\&[_\.\d]+)*\))+)\)\|(\([_\.\d]+(?:\&[_\.\d]+)*\))/\($1$2\|$3\)/g;
1.85 albertel 1092: return $expression;
1.3 www 1093: }
1094:
1.2 www 1095: # -------------------------------------------------------- Build condition hash
1096:
1.140 foxr 1097: #
1098: # Traces a route recursively through the map after it has been loaded
1099: # (I believe this really visits each resourcde that is reachable fromt he
1100: # start top node.
1101: #
1102: # - Marks hidden resources as hidden.
1103: # - Marks which resource URL's must be encrypted.
1104: # - Figures out (if necessary) the first resource in the map.
1105: # - Further builds the chunks of the big hash that define how
1106: # conditions work
1107: #
1108: # Note that the tracing strategy won't visit resources that are not linked to
1109: # anything or islands in the map (groups of resources that form a path but are not
1110: # linked in to the path that can be traced from the start resource...but that's ok
1111: # because by definition, those resources are not reachable by users of the course.
1112: #
1113: # Parameters:
1114: # sofar - _URI of the prior entry or 0 if this is the top.
1115: # rid - URI of the resource to visit.
1116: # beenhere - list of resources (each resource enclosed by &'s) that have
1117: # already been visited.
1118: # encflag - If true the resource that resulted in a recursive call to us
1119: # has an encoded URL (which means contained resources should too).
1120: # hdnflag - If true,the resource that resulted in a recursive call to us
1121: # was hidden (which means contained resources should be hidden too).
1122: # Returns
1123: # new value indicating how far the map has been traversed (the sofar).
1124: #
1.2 www 1125: sub traceroute {
1.149.2.5.2.1 (raeburn 1126:: my ($sofar,$rid,$beenhere,$encflag,$hdnflag,$cid)=@_;
1.81 albertel 1127: my $newsofar=$sofar=simplify($sofar);
1.140 foxr 1128:
1.120 albertel 1129: unless ($beenhere=~/\&\Q$rid\E\&/) {
1.85 albertel 1130: $beenhere.=$rid.'&';
1131: my ($mapid,$resid)=split(/\./,$rid);
1132: my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,$hash{'src_'.$rid});
1133: my $hidden=&Apache::lonnet::EXT('resource.0.hiddenresource',$symb);
1.91 albertel 1134:
1.90 albertel 1135: if ($hdnflag || lc($hidden) eq 'yes') {
1136: $hiddenurl{$rid}=1;
1.91 albertel 1137: }
1138: if (!$hdnflag && lc($hidden) eq 'no') {
1.90 albertel 1139: delete($hiddenurl{$rid});
1140: }
1.91 albertel 1141:
1.85 albertel 1142: my $encrypt=&Apache::lonnet::EXT('resource.0.encrypturl',$symb);
1143: if ($encflag || lc($encrypt) eq 'yes') { $encurl{$rid}=1; }
1.140 foxr 1144:
1.116 www 1145: if (($retfrid eq '') && ($hash{'src_'.$rid})
1.85 albertel 1146: && ($hash{'src_'.$rid}!~/\.sequence$/)) {
1.116 www 1147: $retfrid=$rid;
1.85 albertel 1148: }
1.140 foxr 1149:
1.149.2.5.2.1 (raeburn 1150:: my (@deeplink,@recurseup);
1151:: if ($hash{'is_map_'.$rid}) {
1152:: my ($cdom,$cnum) = split(/_/,$cid);
1153:: my $mapsrc = $hash{'src_'.$rid};
1154:: my $map_pc = $hash{'map_pc_'.$mapsrc};
1155:: my @pcs = split(/,/,$hash{'map_hierarchy_'.$map_pc});
1156:: shift(@pcs);
1157:: @recurseup = map { &Apache::lonnet::declutter($hash{'map_id_'.$_}) } reverse(@pcs);
1158:: my $mapname = &Apache::lonnet::declutter(&Apache::lonnet::deversion($mapsrc));
1159:: my $deeplinkval = &get_mapparam($env{'user.name'},$env{'user.domain'},$cnum,$cdom,
1160:: $rid,$mapname,'0.deeplink',\@recurseup);
1161:: if ($deeplinkval ne '') {
1162:: @deeplink = ($deeplinkval,'map');
1163:: }
1164:: } else {
1165:: my @pcs = split(/,/,$hash{'map_hierarchy_'.$mapid});
1166:: shift(@pcs);
1167:: @recurseup = map { &Apache::lonnet::declutter($hash{'map_id_'.$_}) } reverse(@pcs);
1168:: @deeplink = &Apache::lonnet::EXT('resource.0.deeplink',$symb,'','','','',$cid,\@recurseup);
1169:: }
1170:: unless (@deeplink < 2) {
1171:: $hash{'deeplinkonly_'.$rid}=join(':',map { &escape($_); } @deeplink);
1172:: }
1173::
1.85 albertel 1174: if (defined($hash{'conditions_'.$rid})) {
1175: $hash{'conditions_'.$rid}=simplify(
1.103 albertel 1176: '('.$hash{'conditions_'.$rid}.')|('.$sofar.')');
1.85 albertel 1177: } else {
1178: $hash{'conditions_'.$rid}=$sofar;
1179: }
1.107 albertel 1180:
1181: # if the expression is just the 0th condition keep it
1182: # otherwise leave a pointer to this condition expression
1.140 foxr 1183:
1.107 albertel 1184: $newsofar = ($sofar eq '0') ? $sofar : '_'.$rid;
1185:
1.140 foxr 1186: # Recurse if the resource is a map:
1187:
1.85 albertel 1188: if (defined($hash{'is_map_'.$rid})) {
1189: if (defined($hash{'map_start_'.$hash{'src_'.$rid}})) {
1190: $sofar=$newsofar=
1191: &traceroute($sofar,
1.126 albertel 1192: $hash{'map_start_'.$hash{'src_'.$rid}},
1193: $beenhere,
1.85 albertel 1194: $encflag || $encurl{$rid},
1.149.2.5.2.1 (raeburn 1195:: $hdnflag || $hiddenurl{$rid},
1196:: $cid);
1.85 albertel 1197: }
1198: }
1.140 foxr 1199:
1200: # Processes links to this resource:
1201: # - verify the existence of any conditionals on the link to here.
1202: # - Recurse to any resources linked to us.
1203: #
1.85 albertel 1204: if (defined($hash{'to_'.$rid})) {
1.106 albertel 1205: foreach my $id (split(/\,/,$hash{'to_'.$rid})) {
1.2 www 1206: my $further=$sofar;
1.140 foxr 1207: #
1208: # If there's a condition associated with this link be sure
1209: # it's been defined else that's an error:
1210: #
1.106 albertel 1211: if ($hash{'undercond_'.$id}) {
1212: if (defined($hash{'condid_'.$hash{'undercond_'.$id}})) {
1.105 albertel 1213: $further=simplify('('.'_'.$rid.')&('.
1.106 albertel 1214: $hash{'condid_'.$hash{'undercond_'.$id}}.')');
1.85 albertel 1215: } else {
1.147 raeburn 1216: $errtext.= '<br />'.
1217: &mt('Undefined condition ID: [_1]',
1218: $hash{'undercond_'.$id});
1.85 albertel 1219: }
1.2 www 1220: }
1.140 foxr 1221: # Recurse to resoruces that have to's to us.
1.106 albertel 1222: $newsofar=&traceroute($further,$hash{'goesto_'.$id},$beenhere,
1.149.2.5.2.1 (raeburn 1223:: $encflag,$hdnflag,$cid);
1.85 albertel 1224: }
1225: }
1.2 www 1226: }
1.81 albertel 1227: return $newsofar;
1.2 www 1228: }
1.1 www 1229:
1.19 www 1230: # ------------------------------ Cascading conditions, quick access, parameters
1.4 www 1231:
1.140 foxr 1232: #
1233: # Seems a rather strangely named sub given what the comment above says it does.
1234:
1235:
1.4 www 1236: sub accinit {
1237: my ($uri,$short,$fn)=@_;
1238: my %acchash=();
1239: my %captured=();
1240: my $condcounter=0;
1.5 www 1241: $acchash{'acc.cond.'.$short.'.0'}=0;
1.140 foxr 1242:
1243: # This loop is only interested in conditions and
1244: # parameters in the big hash:
1245:
1.104 albertel 1246: foreach my $key (keys(%hash)) {
1.140 foxr 1247:
1248: # conditions:
1249:
1.104 albertel 1250: if ($key=~/^conditions/) {
1251: my $expr=$hash{$key};
1.140 foxr 1252:
1.109 albertel 1253: # try to find and factor out common sub-expressions
1.140 foxr 1254: # Any subexpression that is found is simplified, removed from
1255: # the original condition expression and the simplified sub-expression
1256: # substituted back in to the epxression..I'm not actually convinced this
1257: # factors anything out...but instead maybe simplifies common factors(?)
1258:
1.105 albertel 1259: foreach my $sub ($expr=~m/(\(\([_\.\d]+(?:\&[_\.\d]+)+\)(?:\|\([_\.\d]+(?:\&[_\.\d]+)+\))+\))/g) {
1.104 albertel 1260: my $orig=$sub;
1.109 albertel 1261:
1262: my ($factor) = ($sub=~/\(\(([_\.\d]+\&(:?[_\.\d]+\&)*)(?:[_\.\d]+\&*)+\)(?:\|\(\1(?:[_\.\d]+\&*)+\))+\)/);
1263: next if (!defined($factor));
1264:
1265: $sub=~s/\Q$factor\E//g;
1.85 albertel 1266: $sub=~s/^\(/\($factor\(/;
1267: $sub.=')';
1268: $sub=simplify($sub);
1.109 albertel 1269: $expr=~s/\Q$orig\E/$sub/;
1.85 albertel 1270: }
1.104 albertel 1271: $hash{$key}=$expr;
1.140 foxr 1272:
1273: # If not yet seen, record in acchash and that we've seen it.
1274:
1.85 albertel 1275: unless (defined($captured{$expr})) {
1276: $condcounter++;
1277: $captured{$expr}=$condcounter;
1278: $acchash{'acc.cond.'.$short.'.'.$condcounter}=$expr;
1279: }
1.140 foxr 1280: # Parameters:
1281:
1.104 albertel 1282: } elsif ($key=~/^param_(\d+)\.(\d+)/) {
1.86 albertel 1283: my $prefix=&Apache::lonnet::encode_symb($hash{'map_id_'.$1},$2,
1284: $hash{'src_'.$1.'.'.$2});
1.104 albertel 1285: foreach my $param (split(/\&/,$hash{$key})) {
1286: my ($typename,$value)=split(/\=/,$param);
1.85 albertel 1287: my ($type,$name)=split(/\:/,$typename);
1.114 www 1288: $parmhash{$prefix.'.'.&unescape($name)}=
1289: &unescape($value);
1290: $parmhash{$prefix.'.'.&unescape($name).'.type'}=
1291: &unescape($type);
1.85 albertel 1292: }
1293: }
1.26 harris41 1294: }
1.140 foxr 1295: # This loop only processes id entries in the big hash.
1296:
1.104 albertel 1297: foreach my $key (keys(%hash)) {
1298: if ($key=~/^ids/) {
1299: foreach my $resid (split(/\,/,$hash{$key})) {
1.85 albertel 1300: my $uri=$hash{'src_'.$resid};
1.100 albertel 1301: my ($uripath,$urifile) =
1302: &Apache::lonnet::split_uri_for_cond($uri);
1.85 albertel 1303: if ($uripath) {
1304: my $uricond='0';
1305: if (defined($hash{'conditions_'.$resid})) {
1306: $uricond=$captured{$hash{'conditions_'.$resid}};
1307: }
1308: if (defined($acchash{'acc.res.'.$short.'.'.$uripath})) {
1309: if ($acchash{'acc.res.'.$short.'.'.$uripath}=~
1310: /(\&\Q$urifile\E\:[^\&]*)/) {
1311: my $replace=$1;
1312: my $regexp=$replace;
1313: #$regexp=~s/\|/\\\|/g;
1.105 albertel 1314: $acchash{'acc.res.'.$short.'.'.$uripath} =~
1.104 albertel 1315: s/\Q$regexp\E/$replace\|$uricond/;
1.85 albertel 1316: } else {
1317: $acchash{'acc.res.'.$short.'.'.$uripath}.=
1318: $urifile.':'.$uricond.'&';
1319: }
1320: } else {
1321: $acchash{'acc.res.'.$short.'.'.$uripath}=
1322: '&'.$urifile.':'.$uricond.'&';
1323: }
1324: }
1325: }
1326: }
1.26 harris41 1327: }
1.24 www 1328: $acchash{'acc.res.'.$short.'.'}='&:0&';
1.8 www 1329: my $courseuri=$uri;
1330: $courseuri=~s/^\/res\///;
1.131 raeburn 1331: my $regexp = 1;
1332: &Apache::lonnet::delenv('(acc\.|httpref\.)',$regexp);
1.128 raeburn 1333: &Apache::lonnet::appenv(\%acchash);
1.4 www 1334: }
1335:
1.73 www 1336: # ---------------- Selectively delete from randompick maps and hidden url parms
1.29 www 1337:
1.73 www 1338: sub hiddenurls {
1.31 www 1339: my $randomoutentry='';
1.149 raeburn 1340: foreach my $rid (keys(%randompick)) {
1.29 www 1341: my $rndpick=$randompick{$rid};
1342: my $mpc=$hash{'map_pc_'.$hash{'src_'.$rid}};
1343: # ------------------------------------------- put existing resources into array
1344: my @currentrids=();
1.106 albertel 1345: foreach my $key (sort(keys(%hash))) {
1346: if ($key=~/^src_($mpc\.\d+)/) {
1.29 www 1347: if ($hash{'src_'.$1}) { push @currentrids, $1; }
1348: }
1349: }
1.50 albertel 1350: # rids are number.number and we want to numercially sort on
1351: # the second number
1352: @currentrids=sort {
1353: my (undef,$aid)=split(/\./,$a);
1354: my (undef,$bid)=split(/\./,$b);
1355: $aid <=> $bid;
1356: } @currentrids;
1.29 www 1357: next if ($#currentrids<$rndpick);
1358: # -------------------------------- randomly eliminate the ones that should stay
1.50 albertel 1359: my (undef,$id)=split(/\./,$rid);
1.51 www 1360: if ($randompickseed{$rid}) { $id=$randompickseed{$rid}; }
1.146 raeburn 1361: my $setcode;
1362: if (defined($randomizationcode{$rid})) {
1363: if ($env{'form.CODE'} eq '') {
1364: $env{'form.CODE'} = $randomizationcode{$rid};
1365: $setcode = 1;
1366: }
1367: }
1.50 albertel 1368: my $rndseed=&Apache::lonnet::rndseed($id); # use id instead of symb
1.146 raeburn 1369: if ($setcode) {
1370: undef($env{'form.CODE'});
1371: undef($setcode);
1372: }
1.58 albertel 1373: &Apache::lonnet::setup_random_from_rndseed($rndseed);
1.50 albertel 1374: my @whichids=&Math::Random::random_permuted_index($#currentrids+1);
1375: for (my $i=1;$i<=$rndpick;$i++) { $currentrids[$whichids[$i]]=''; }
1376: #&Apache::lonnet::logthis("$id,$rndseed,".join(':',@whichids));
1.29 www 1377: # -------------------------------------------------------- delete the leftovers
1378: for (my $k=0; $k<=$#currentrids; $k++) {
1379: if ($currentrids[$k]) {
1380: $hash{'randomout_'.$currentrids[$k]}=1;
1.32 www 1381: my ($mapid,$resid)=split(/\./,$currentrids[$k]);
1.149.2.2 raeburn 1382: if ($rescount{$mapid}) {
1383: $rescount{$mapid} --;
1384: }
1385: if ($hash{'is_map_'.$currentrids[$k]}) {
1386: if ($mapcount{$mapid}) {
1387: $mapcount{$mapid} --;
1388: }
1389: }
1.32 www 1390: $randomoutentry.='&'.
1.86 albertel 1391: &Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},
1392: $resid,
1393: $hash{'src_'.$currentrids[$k]}
1394: ).'&';
1.29 www 1395: }
1396: }
1.31 www 1397: }
1.73 www 1398: # ------------------------------ take care of explicitly hidden urls or folders
1.149 raeburn 1399: foreach my $rid (keys(%hiddenurl)) {
1.73 www 1400: $hash{'randomout_'.$rid}=1;
1401: my ($mapid,$resid)=split(/\./,$rid);
1.149.2.2 raeburn 1402: if ($rescount{$mapid}) {
1403: $rescount{$mapid} --;
1404: }
1405: if ($hash{'is_map_'.$rid}) {
1406: if ($mapcount{$mapid}) {
1407: $mapcount{$mapid} --;
1408: }
1409: }
1.73 www 1410: $randomoutentry.='&'.
1.86 albertel 1411: &Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,
1412: $hash{'src_'.$rid}).'&';
1.73 www 1413: }
1414: # --------------------------------------- append randomout entry to environment
1.31 www 1415: if ($randomoutentry) {
1.128 raeburn 1416: &Apache::lonnet::appenv({'acc.randomout' => $randomoutentry});
1.29 www 1417: }
1418: }
1419:
1.149.2.5.2.1 (raeburn 1420:: sub deeplinkouts {
1421:: my $deeplinkoutentry;
1422:: foreach my $rid (keys(%deeplinkout)) {
1423:: $hash{'deeplinkout_'.$rid}=1;
1424:: my ($mapid,$resid)=split(/\./,$rid);
1425:: $deeplinkoutentry.='&'.
1426:: &Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,
1427:: $hash{'src_'.$rid}).'&';
1428:: }
1429:: # --------------------------------------- append deeplinkout entry to environment
1430:: if ($deeplinkoutentry) {
1431:: &Apache::lonnet::appenv({'acc.deeplinkout' => $deeplinkoutentry});
1432:: }
1433:: }
1434::
1.149.2.2 raeburn 1435: # -------------------------------------- populate big hash with map breadcrumbs
1436:
1437: # Create map_breadcrumbs_$pc from map_hierarchy_$pc by omitting intermediate
1438: # maps not shown in Course Contents table.
1439:
1440: sub mapcrumbs {
1.149.2.5.2.1 (raeburn 1441:: my ($cid) = @_;
1.149.2.2 raeburn 1442: foreach my $key (keys(%rescount)) {
1443: if ($hash{'map_hierarchy_'.$key}) {
1444: my $skipnext = 0;
1445: foreach my $id (split(/,/,$hash{'map_hierarchy_'.$key}),$key) {
1.149.2.5.2.1 (raeburn 1446:: my $rid = $hash{'ids_'.$hash{'map_id_'.$id}};
1447:: unless (($skipnext) || (!&is_advanced($cid) && $hash{'deeplinkout_'.$rid})) {
1.149.2.2 raeburn 1448: $hash{'map_breadcrumbs_'.$key} .= "$id,";
1449: }
1450: unless (($id == 0) || ($id == 1)) {
1451: if ((!$rescount{$id}) || ($rescount{$id} == 1 && $mapcount{$id} == 1)) {
1452: $skipnext = 1;
1453: } else {
1454: $skipnext = 0;
1455: }
1456: }
1457: }
1458: $hash{'map_breadcrumbs_'.$key} =~ s/,$//;
1459: }
1460: }
1461: }
1462:
1.1 www 1463: # ---------------------------------------------------- Read map and all submaps
1464:
1465: sub readmap {
1.149.2.5 raeburn 1466: my ($short,$critmsg_check) = @_;
1.85 albertel 1467: $short=~s/^\///;
1.138 foxr 1468:
1469: # TODO: Hidden dependency on current user:
1470:
1471: my %cenv=&Apache::lonnet::coursedescription($short,{'freshen_cache'=>1});
1472:
1.85 albertel 1473: my $fn=$cenv{'fn'};
1474: my $uri;
1475: $short=~s/\//\_/g;
1476: unless ($uri=$cenv{'url'}) {
1.133 raeburn 1477: &Apache::lonnet::logthis('<font color="blue">WARNING: '.
1.85 albertel 1478: "Could not load course $short.</font>");
1.114 www 1479: return ('',&mt('No course data available.'));;
1.85 albertel 1480: }
1481: @cond=('true:normal');
1.96 albertel 1482:
1.149.2.2 raeburn 1483: unless (open(LOCKFILE,">","$fn.db.lock")) {
1.138 foxr 1484: #
1485: # Most likely a permissions problem on the lockfile or its directory.
1486: #
1.133 raeburn 1487: $retfurl = '';
1.144 raeburn 1488: return ($retfurl,'<br />'.&mt('Map not loaded - Lock file could not be opened when reading map:').' <tt>'.$fn.'</tt>.');
1.133 raeburn 1489: }
1.96 albertel 1490: my $lock=0;
1.132 raeburn 1491: my $gotstate=0;
1.138 foxr 1492:
1493: # If we can get the lock without delay any files there are idle
1494: # and from some prior request. We'll kill them off and regenerate them:
1495:
1496: if (flock(LOCKFILE,LOCK_EX|LOCK_NB)) {
1497: $lock=1; # Remember that we hold the lock.
1.132 raeburn 1498: &unlink_tmpfiles($fn);
1.96 albertel 1499: }
1.85 albertel 1500: undef %randompick;
1.149.2.1 raeburn 1501: undef %randompickseed;
1502: undef %randomorder;
1.149.2.2 raeburn 1503: undef %randomizationcode;
1.85 albertel 1504: undef %hiddenurl;
1505: undef %encurl;
1.149.2.5.2.1 (raeburn 1506:: undef %deeplinkout;
1.149.2.2 raeburn 1507: undef %rescount;
1508: undef %mapcount;
1.116 www 1509: $retfrid='';
1.144 raeburn 1510: $errtext='';
1.138 foxr 1511: my ($untiedhash,$untiedparmhash,$tiedhash,$tiedparmhash); # More state flags.
1512:
1513: # if we got the lock, regenerate course regnerate empty files and tie them.
1514:
1.132 raeburn 1515: if ($lock) {
1516: if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_WRCREAT(),0640)) {
1517: $tiedhash = 1;
1518: if (tie(%parmhash,'GDBM_File',$fn.'_parms.db',&GDBM_WRCREAT(),0640)) {
1519: $tiedparmhash = 1;
1.138 foxr 1520: $gotstate = &build_tmp_hashes($uri,
1521: $fn,
1522: $short,
1523: \%cenv); # TODO: Need to provide requested user@dom
1.132 raeburn 1524: unless ($gotstate) {
1525: &Apache::lonnet::logthis('Failed to write statemap at first attempt '.$fn.' for '.$uri.'.</font>');
1526: }
1527: $untiedparmhash = untie(%parmhash);
1528: unless ($untiedparmhash) {
1529: &Apache::lonnet::logthis('<font color="blue">WARNING: '.
1530: 'Could not untie coursemap parmhash '.$fn.' for '.$uri.'.</font>');
1531: }
1532: }
1533: $untiedhash = untie(%hash);
1534: unless ($untiedhash) {
1535: &Apache::lonnet::logthis('<font color="blue">WARNING: '.
1536: 'Could not untie coursemap hash '.$fn.' for '.$uri.'.</font>');
1537: }
1538: }
1.138 foxr 1539: flock(LOCKFILE,LOCK_UN); # RF: this is what I don't get unless there are other
1540: # unlocked places the remainder happens..seems like if we
1541: # just kept the lock here the rest of the code would have
1542: # been much easier?
1.132 raeburn 1543: }
1544: unless ($lock && $tiedhash && $tiedparmhash) {
1.87 albertel 1545: # if we are here it is likely because we are already trying to
1546: # initialize the course in another child, busy wait trying to
1547: # tie the hashes for the next 90 seconds, if we succeed forward
1548: # them on to navmaps, if we fail, throw up the Could not init
1549: # course screen
1.138 foxr 1550: #
1551: # RF: I'm not seeing the case where the ties/unties can fail in a way
1552: # that can be remedied by this. Since we owned the lock seems
1553: # Tie/untie failures are a result of something like a permissions problem instead?
1554: #
1555:
1556: # In any vent, undo what we did manage to do above first:
1.96 albertel 1557: if ($lock) {
1558: # Got the lock but not the DB files
1559: flock(LOCKFILE,LOCK_UN);
1.132 raeburn 1560: $lock = 0;
1.96 albertel 1561: }
1.132 raeburn 1562: if ($tiedhash) {
1563: unless($untiedhash) {
1564: untie(%hash);
1565: }
1566: }
1567: if ($tiedparmhash) {
1568: unless($untiedparmhash) {
1569: untie(%parmhash);
1570: }
1571: }
1.138 foxr 1572: # Log our failure:
1573:
1.133 raeburn 1574: &Apache::lonnet::logthis('<font color="blue">WARNING: '.
1.132 raeburn 1575: "Could not tie coursemap $fn for $uri.</font>");
1576: $tiedhash = '';
1577: $tiedparmhash = '';
1.87 albertel 1578: my $i=0;
1.138 foxr 1579:
1580: # Keep on retrying the lock for 90 sec until we succeed.
1581:
1.87 albertel 1582: while($i<90) {
1583: $i++;
1584: sleep(1);
1.132 raeburn 1585: if (flock(LOCKFILE,LOCK_EX|LOCK_NB)) {
1.138 foxr 1586:
1587: # Got the lock, tie the hashes...the assumption in this code is
1588: # that some other worker thread has created the db files quite recently
1589: # so no load is needed:
1590:
1.132 raeburn 1591: $lock = 1;
1592: if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER(),0640)) {
1593: $tiedhash = 1;
1594: if (tie(%parmhash,'GDBM_File',$fn.'_parms.db',&GDBM_READER(),0640)) {
1595: $tiedparmhash = 1;
1596: if (-e "$fn.state") {
1597: $retfurl='/adm/navmaps';
1.138 foxr 1598:
1599: # BUG BUG: Side effect!
1600: # Should conditionalize on something so that we can use this
1601: # to load maps for courses that are not current?
1602: #
1.132 raeburn 1603: &Apache::lonnet::appenv({"request.course.id" => $short,
1604: "request.course.fn" => $fn,
1.143 raeburn 1605: "request.course.uri" => $uri,
1606: "request.course.tied" => time});
1607:
1.132 raeburn 1608: $untiedhash = untie(%hash);
1609: $untiedparmhash = untie(%parmhash);
1610: $gotstate = 1;
1611: last;
1612: }
1613: $untiedparmhash = untie(%parmhash);
1614: }
1615: $untiedhash = untie(%hash);
1616: }
1617: }
1.87 albertel 1618: }
1.132 raeburn 1619: if ($lock) {
1620: flock(LOCKFILE,LOCK_UN);
1.133 raeburn 1621: $lock = 0;
1.132 raeburn 1622: if ($tiedparmhash) {
1623: unless ($untiedparmhash) {
1624: &Apache::lonnet::logthis('<font color="blue">WARNING: '.
1625: 'Could not untie coursemap parmhash '.$fn.' for '.$uri.'.</font>');
1626: }
1627: }
1628: if ($tiedparmhash) {
1629: unless ($untiedhash) {
1630: &Apache::lonnet::logthis('<font color="blue">WARNING: '.
1631: 'Could not untie coursemap hash '.$fn.' for '.$uri.'.</font>');
1632: }
1633: }
1634: }
1635: }
1.138 foxr 1636: # I think this branch of code is all about what happens if we just did the stuff above,
1637: # but found that the state file did not exist...again if we'd just held the lock
1638: # would that have made this logic simpler..as generating all the files would be
1639: # an atomic operation with respect to the lock.
1640: #
1.132 raeburn 1641: unless ($gotstate) {
1.133 raeburn 1642: $lock = 0;
1.132 raeburn 1643: &Apache::lonnet::logthis('<font color="blue">WARNING: '.
1644: 'Could not read statemap '.$fn.' for '.$uri.'.</font>');
1645: &unlink_tmpfiles($fn);
1.133 raeburn 1646: if (flock(LOCKFILE,LOCK_EX|LOCK_NB)) {
1647: $lock=1;
1648: }
1649: undef %randompick;
1.149.2.1 raeburn 1650: undef %randompickseed;
1651: undef %randomorder;
1.149.2.2 raeburn 1652: undef %randomizationcode;
1.133 raeburn 1653: undef %hiddenurl;
1654: undef %encurl;
1.149.2.5.2.1 (raeburn 1655:: undef %deeplinkout;
1.149.2.2 raeburn 1656: undef %rescount;
1657: undef %mapcount;
1.144 raeburn 1658: $errtext='';
1.133 raeburn 1659: $retfrid='';
1.138 foxr 1660: #
1661: # Once more through the routine of tying and loading and so on.
1662: #
1.133 raeburn 1663: if ($lock) {
1664: if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_WRCREAT(),0640)) {
1665: if (tie(%parmhash,'GDBM_File',$fn.'_parms.db',&GDBM_WRCREAT(),0640)) {
1.138 foxr 1666: $gotstate = &build_tmp_hashes($uri,$fn,$short,\%cenv); # TODO: User dependent?
1.133 raeburn 1667: unless ($gotstate) {
1.132 raeburn 1668: &Apache::lonnet::logthis('<font color="blue">WARNING: '.
1.133 raeburn 1669: 'Failed to write statemap at second attempt '.$fn.' for '.$uri.'.</font>');
1.132 raeburn 1670: }
1.133 raeburn 1671: unless (untie(%parmhash)) {
1.132 raeburn 1672: &Apache::lonnet::logthis('<font color="blue">WARNING: '.
1.133 raeburn 1673: 'Could not untie coursemap parmhash '.$fn.'.db for '.$uri.'.</font>');
1.132 raeburn 1674: }
1.133 raeburn 1675: } else {
1676: &Apache::lonnet::logthis('<font color="blue">WARNING: '.
1677: 'Could not tie coursemap '.$fn.'__parms.db for '.$uri.'.</font>');
1678: }
1679: unless (untie(%hash)) {
1680: &Apache::lonnet::logthis('<font color="blue">WARNING: '.
1681: 'Could not untie coursemap hash '.$fn.'.db for '.$uri.'.</font>');
1682: }
1.132 raeburn 1683: } else {
1.133 raeburn 1684: &Apache::lonnet::logthis('<font color="blue">WARNING: '.
1685: 'Could not tie coursemap '.$fn.'.db for '.$uri.'.</font>');
1.132 raeburn 1686: }
1.133 raeburn 1687: flock(LOCKFILE,LOCK_UN);
1688: $lock = 0;
1689: } else {
1.138 foxr 1690: # Failed to get the immediate lock.
1691:
1.133 raeburn 1692: &Apache::lonnet::logthis('<font color="blue">WARNING: '.
1693: 'Could not obtain lock to tie coursemap hash '.$fn.'.db for '.$uri.'.</font>');
1.132 raeburn 1694: }
1695: }
1.133 raeburn 1696: close(LOCKFILE);
1.132 raeburn 1697: unless (($errtext eq '') || ($env{'request.course.uri'} =~ m{^/uploaded/})) {
1698: &Apache::lonmsg::author_res_msg($env{'request.course.uri'},
1.138 foxr 1699: $errtext); # TODO: User dependent?
1.1 www 1700: }
1.46 www 1701: # ------------------------------------------------- Check for critical messages
1702:
1.138 foxr 1703: # Depends on user must parameterize this as well..or separate as this is:
1704: # more part of determining what someone sees on entering a course?
1.149.2.5 raeburn 1705: # When lonuserstate::readmap() is called from lonroles.pm, i.e.,
1706: # after selecting a role in a course, critical_redirect will be called,
1707: # unless the course has a blocking event in effect, which suppresses
1708: # critical message checking (users without evb priv).
1709: #
1.138 foxr 1710:
1.149.2.5 raeburn 1711: if ($critmsg_check) {
1712: my ($redirect,$url) = &Apache::loncommon::critical_redirect();
1713: if ($redirect) {
1714: $retfurl = $url;
1.46 www 1715: }
1.149.2.5 raeburn 1716: }
1.85 albertel 1717: return ($retfurl,$errtext);
1.1 www 1718: }
1.15 www 1719:
1.138 foxr 1720: #
1721: # This sub is called when the course hash and the param hash have been tied and
1722: # their lock file is held.
1723: # Parameters:
1724: # $uri - URI that identifies the course.
1725: # $fn - The base path/filename of the files that make up the context
1726: # being built.
1727: # $short - Short course name.
1728: # $cenvref - Reference to the course environment hash returned by
1729: # Apache::lonnet::coursedescription
1730: #
1731: # Assumptions:
1732: # The globals
1733: # %hash, %paramhash are tied to their gdbm files and we hold the lock on them.
1734: #
1.132 raeburn 1735: sub build_tmp_hashes {
1736: my ($uri,$fn,$short,$cenvref) = @_;
1.138 foxr 1737:
1.132 raeburn 1738: unless(ref($cenvref) eq 'HASH') {
1739: return;
1740: }
1741: my %cenv = %{$cenvref};
1742: my $gotstate = 0;
1.138 foxr 1743: %hash=(); # empty the global course and parameter hashes.
1.132 raeburn 1744: %parmhash=();
1.138 foxr 1745: $errtext=''; # No error messages yet.
1.132 raeburn 1746: $pc=0;
1747: &clear_mapalias_count();
1748: &processversionfile(%cenv);
1.140 foxr 1749:
1750: # URI Of the map file.
1751:
1.132 raeburn 1752: my $furi=&Apache::lonnet::clutter($uri);
1.138 foxr 1753: #
1754: # the map staring points.
1755: #
1.132 raeburn 1756: $hash{'src_0.0'}=&versiontrack($furi);
1757: $hash{'title_0.0'}=&Apache::lonnet::metadata($uri,'title');
1758: $hash{'ids_'.$furi}='0.0';
1759: $hash{'is_map_0.0'}=1;
1.140 foxr 1760:
1761: # Load the map.. note that loadmap may implicitly recurse if the map contains
1762: # sub-maps.
1763:
1.146 raeburn 1764: &loadmap($uri,'0.0',$short);
1.140 foxr 1765:
1766: # The code below only executes if there is a starting point for the map>
1767: # Q/BUG??? If there is no start resource for the map should that be an error?
1768: #
1769:
1.132 raeburn 1770: if (defined($hash{'map_start_'.$uri})) {
1771: &Apache::lonnet::appenv({"request.course.id" => $short,
1772: "request.course.fn" => $fn,
1.143 raeburn 1773: "request.course.uri" => $uri,
1774: "request.course.tied" => time});
1.132 raeburn 1775: $env{'request.course.id'}=$short;
1.149.2.5.2.1 (raeburn 1776:: &traceroute('0',$hash{'map_start_'.$uri},'&','','',$short);
1.132 raeburn 1777: &accinit($uri,$short,$fn);
1778: &hiddenurls();
1779: }
1780: $errtext .= &get_mapalias_errors();
1781: # ------------------------------------------------------- Put versions into src
1782: foreach my $key (keys(%hash)) {
1783: if ($key=~/^src_/) {
1784: $hash{$key}=&putinversion($hash{$key});
1785: } elsif ($key =~ /^(map_(?:start|finish|pc)_)(.*)/) {
1786: my ($type, $url) = ($1,$2);
1787: my $value = $hash{$key};
1788: $hash{$type.&putinversion($url)}=$value;
1789: }
1790: }
1791: # ---------------------------------------------------------------- Encrypt URLs
1792: foreach my $id (keys(%encurl)) {
1793: # $hash{'src_'.$id}=&Apache::lonenc::encrypted($hash{'src_'.$id});
1794: $hash{'encrypted_'.$id}=1;
1795: }
1796: # ----------------------------------------------- Close hashes to finally store
1797: # --------------------------------- Routine must pass this point, no early outs
1798: $hash{'first_rid'}=$retfrid;
1799: my ($mapid,$resid)=split(/\./,$retfrid);
1800: $hash{'first_mapurl'}=$hash{'map_id_'.$mapid};
1801: my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,$hash{'src_'.$retfrid});
1802: $retfurl=&add_get_param($hash{'src_'.$retfrid},{ 'symb' => $symb });
1803: if ($hash{'encrypted_'.$retfrid}) {
1804: $retfurl=&Apache::lonenc::encrypted($retfurl,(&Apache::lonnet::allowed('adv') ne 'F'));
1805: }
1806: $hash{'first_url'}=$retfurl;
1807: # ---------------------------------------------------- Store away initial state
1808: {
1809: my $cfh;
1.149.2.2 raeburn 1810: if (open($cfh,">","$fn.state")) {
1.132 raeburn 1811: print $cfh join("\n",@cond);
1812: $gotstate = 1;
1813: } else {
1814: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
1815: "Could not write statemap $fn for $uri.</font>");
1816: }
1817: }
1.149.2.5.2.1 (raeburn 1818::
1819:: # Was initial access via a deep-link?
1820:: my ($cdom,$cnum) = split(/_/,$short);
1821:: if (($cdom ne '') && ($env{'request.deeplink.login'} ne '')) {
1822:: my $deeplink_symb = &Apache::loncommon::deeplink_login_symb($cnum,$cdom);
1823:: if ($deeplink_symb) {
1824:: my ($loginrid,$deeplink_login_pc,$login_hierarchy);
1825:: my ($map,$resid,$url) = &Apache::lonnet::decode_symb($deeplink_symb);
1826:: $loginrid = $hash{'map_pc_'.&Apache::lonnet::clutter($map)}.'.'.$resid;
1827:: if ($deeplink_symb =~ /\.(page|sequence)$/) {
1828:: $deeplink_login_pc = $hash{'map_pc_'.&Apache::lonnet::clutter($url)};
1829:: } else {
1830:: $deeplink_login_pc = $hash{'map_pc_'.&Apache::lonnet::clutter($map)};
1831:: }
1832:: my $deeplink;
1833:: if ($hash{'deeplinkonly_'.$loginrid} ne '') {
1834:: my @deeplinkinfo = map { &unescape($_); } split(/:/,$hash{'deeplinkonly_'.$loginrid});
1835:: unless (@deeplinkinfo < 2) {
1836:: $deeplink = $deeplinkinfo[0];
1837:: }
1838:: }
1839:: if ($deeplink) {
1840:: my $disallow;
1841:: my ($state,$others,$listed,$scope,$protect) = split(/,/,$deeplink);
1842:: if (($protect ne 'none') && ($protect ne '')) {
1843:: my ($acctype,$item) = split(/:/,$protect);
1844:: if ($acctype =~ /lti(c|d)$/) {
1845:: unless ($env{'request.linkprot'} eq $item.$1.':'.$env{'request.deeplink.login'}) {
1846:: $disallow = 1;
1847:: }
1848:: } elsif ($acctype eq 'key') {
1849:: unless ($env{'request.linkkey'} eq $item) {
1850:: $disallow = 1;
1851:: }
1852:: }
1853:: }
1854:: if ($disallow) {
1855:: &Apache::lonnet::delenv('request.deeplink.login');
1.149.2.5.2.2 (raeburn 1856:: if ($env{'request.deeplink.target'} ne '') {
1857:: &Apache::lonnet::delenv('request.deeplink.target');
1858:: }
1.149.2.5.2.1 (raeburn 1859:: } else {
1860:: if ($others eq 'hide') {
1861:: my @recfolders;
1862:: if ($scope eq 'rec') {
1863:: foreach my $key (keys(%hash)) {
1864:: if ($key=~/^map_hierarchy_(\d+)$/) {
1865:: my $mpc = $1;
1866:: my @ids = split(/,/,$hash{$key});
1867:: if (grep(/^$deeplink_login_pc$/,@ids)) {
1868:: my $idx;
1869:: foreach my $mapid (@ids) {
1870:: if ($idx) {
1871:: push(@recfolders,$mapid);
1872:: } elsif ($mapid == $deeplink_login_pc) {
1873:: push(@recfolders,$mapid);
1874:: $idx = $mapid;
1875:: }
1876:: }
1877:: push(@recfolders,$mpc);
1878:: }
1879:: }
1880:: }
1881:: }
1882:: foreach my $key (keys(%hash)) {
1883:: if ($key=~/^src_(.+)$/) {
1884:: my $rid = $1;
1885:: next if ($rid eq '0.0');
1886:: next if ($rid eq $loginrid);
1887:: if ($scope ne 'res') {
1888:: my $mapid = (split(/\./,$rid))[0];
1889:: next if ($mapid eq $deeplink_login_pc);
1890:: if ($scope eq 'rec') {
1891:: next if (grep(/^$mapid$/,@recfolders));
1892:: }
1893:: }
1894:: $deeplinkout{$rid} = 1;
1895:: }
1896:: }
1897:: }
1898:: }
1899:: &deeplinkouts();
1900:: }
1901:: }
1902:: }
1903:: &mapcrumbs();
1.132 raeburn 1904: return $gotstate;
1905: }
1906:
1907: sub unlink_tmpfiles {
1908: my ($fn) = @_;
1.138 foxr 1909: my $file_dir = dirname($fn);
1910:
1.145 raeburn 1911: if ("$file_dir/" eq LONCAPA::tempdir()) {
1.132 raeburn 1912: my @files = qw (.db _symb.db .state _parms.db);
1913: foreach my $file (@files) {
1914: if (-e $fn.$file) {
1915: unless (unlink($fn.$file)) {
1916: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
1917: "Could not unlink ".$fn.$file."</font>");
1918: }
1919: }
1920: }
1921: }
1922: return;
1923: }
1924:
1.15 www 1925: # ------------------------------------------------------- Evaluate state string
1926:
1927: sub evalstate {
1.89 albertel 1928: my $fn=$env{'request.course.fn'}.'.state';
1.80 albertel 1929: my $state='';
1.15 www 1930: if (-e $fn) {
1.80 albertel 1931: my @conditions=();
1932: {
1.149.2.2 raeburn 1933: open(my $fh,"<",$fn);
1.80 albertel 1934: @conditions=<$fh>;
1.115 raeburn 1935: close($fh);
1.80 albertel 1936: }
1937: my $safeeval = new Safe;
1938: my $safehole = new Safe::Hole;
1939: $safeeval->permit("entereval");
1940: $safeeval->permit(":base_math");
1941: $safeeval->deny(":base_io");
1942: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
1943: foreach my $line (@conditions) {
1944: chomp($line);
1945: my ($condition,$weight)=split(/\:/,$line);
1946: if ($safeeval->reval($condition)) {
1947: if ($weight eq 'force') {
1948: $state.='3';
1949: } else {
1950: $state.='2';
1951: }
1952: } else {
1953: if ($weight eq 'stop') {
1954: $state.='0';
1955: } else {
1956: $state.='1';
1957: }
1958: }
1959: }
1.15 www 1960: }
1.128 raeburn 1961: &Apache::lonnet::appenv({'user.state.'.$env{'request.course.id'} => $state});
1.15 www 1962: return $state;
1963: }
1964:
1.149.2.5.2.1 (raeburn 1965:: sub get_mapparam {
1966:: my ($uname,$udom,$cnum,$cdom,$rid,$mapname,$what,$recurseupref) = @_;
1967:: unless ($mapname) { return; }
1968::
1969:: # ------------------------------------------------- Get coursedata (if present)
1970:: my $courseopt=&Apache::lonnet::get_courseresdata($cnum,$cdom);
1971:: if (!ref($courseopt)) {
1972:: undef($courseopt);
1973:: }
1974::
1975:: # --------------------------------------------------- Get userdata (if present)
1976:: my $useropt=&Apache::lonnet::get_userresdata($uname,$udom);
1977:: if (!ref($useropt)) {
1978:: undef($useropt);
1979:: }
1980::
1981:: my @recurseup;
1982:: if (ref($recurseupref) eq 'ARRAY') {
1983:: @recurseup = @{$recurseupref};
1984:: }
1985::
1986:: # Get the section if there is one.
1987::
1988:: my $cid = $cdom.'_'.$cnum;
1989:: my $csec=$env{'request.course.sec'};
1990:: my $cgroup='';
1991:: my @cgrps=split(/:/,$env{'request.course.groups'});
1992:: if (@cgrps > 0) {
1993:: @cgrps = sort(@cgrps);
1994:: $cgroup = $cgrps[0];
1995:: }
1996::
1997:: my $rwhat=$what;
1998:: $what=~s/^parameter\_//;
1999:: $what=~s/\_/\./;
2000::
2001:: # Build the hash keys for the lookup:
2002::
2003:: my $mapparm=$mapname.'___(all).'.$what;
2004:: my $recurseparm=$mapname.'___(rec).'.$what;
2005:: my $usercourseprefix=$cid;
2006::
2007:: my $grplevelm = "$usercourseprefix.[$cgroup].$mapparm";
2008:: my $seclevelm = "$usercourseprefix.[$csec].$mapparm";
2009:: my $courselevelm = "$usercourseprefix.$mapparm";
2010::
2011:: my $grpleveli = "$usercourseprefix.[$cgroup].$recurseparm";
2012:: my $secleveli = "$usercourseprefix.[$csec].$recurseparm";
2013:: my $courseleveli = "$usercourseprefix.$recurseparm";
2014::
2015:: # Check per user
2016::
2017:: if ($uname and defined($useropt)) {
2018:: if (defined($$useropt{$courselevelm})) {
2019:: return $$useropt{$courselevelm};
2020:: }
2021:: if (defined($$useropt{$courseleveli})) {
2022:: return $$useropt{$courseleveli};
2023:: }
2024:: foreach my $item (@recurseup) {
2025:: my $norecursechk=$usercourseprefix.'.'.$item.'___(all).'.$what;
2026:: if (defined($$useropt{$norecursechk})) {
2027:: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
2028:: return $$useropt{$norecursechk};
2029:: } else {
2030:: last;
2031:: }
2032:: }
2033:: }
2034:: }
2035::
2036:: # Check course -- group
2037::
2038:: if ($cgroup ne '' and defined ($courseopt)) {
2039:: if (defined($$courseopt{$grplevelm})) {
2040:: return $$courseopt{$grplevelm};
2041:: }
2042:: if (defined($$courseopt{$grpleveli})) {
2043:: return $$courseopt{$grpleveli};
2044:: }
2045:: foreach my $item (@recurseup) {
2046:: my $norecursechk=$usercourseprefix.'.['.$cgroup.'].'.$item.'___(all).'.$what;
2047:: if (defined($$courseopt{$norecursechk})) {
2048:: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
2049:: return $$courseopt{$norecursechk};
2050:: } else {
2051:: last;
2052:: }
2053:: }
2054:: }
2055:: }
2056::
2057:: # Check course -- section
2058::
2059:: if ($csec ne '' and defined($courseopt)) {
2060:: if (defined($$courseopt{$seclevelm})) {
2061:: return $$courseopt{$seclevelm};
2062:: }
2063:: if (defined($$courseopt{$secleveli})) {
2064:: return $$courseopt{$secleveli};
2065:: }
2066:: foreach my $item (@recurseup) {
2067:: my $norecursechk=$usercourseprefix.'.['.$csec.'].'.$item.'___(all).'.$what;
2068:: if (defined($$courseopt{$norecursechk})) {
2069:: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
2070:: return $$courseopt{$norecursechk};
2071:: } else {
2072:: last;
2073:: }
2074:: }
2075:: }
2076:: }
2077::
2078:: # Check the map parameters themselves:
2079::
2080:: if ($hash{'param_'.$rid}) {
2081:: my @items = split(/\&/,$hash{'param_'.$rid});
2082:: my $thisparm;
2083:: foreach my $item (@items) {
2084:: my ($esctype,$escname,$escvalue) = ($item =~ /^([^:]+):([^=]+)=(.*)$/);
2085:: my $name = &unescape($escname);
2086:: my $value = &unescape($escvalue);
2087:: if ($name eq $what) {
2088:: $thisparm = $value;
2089:: last;
2090:: }
2091:: }
2092:: if (defined($thisparm)) {
2093:: return $thisparm;
2094:: }
2095:: }
2096::
2097:: # Additional course parameters:
2098::
2099:: if (defined($courseopt)) {
2100:: if (defined($$courseopt{$courselevelm})) {
2101:: return $$courseopt{$courselevelm};
2102:: }
2103::
2104:: if (defined($$courseopt{$courseleveli})) {
2105:: return $$courseopt{$courseleveli};
2106:: }
2107::
2108:: if (@recurseup) {
2109:: foreach my $item (@recurseup) {
2110:: my $norecursechk=$usercourseprefix.'.'.$item.'___(all).'.$what;
2111:: if (defined($$courseopt{$norecursechk})) {
2112:: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
2113:: return $$courseopt{$norecursechk};
2114:: } else {
2115:: last;
2116:: }
2117:: }
2118:: }
2119:: }
2120:: }
2121:: return undef;
2122:: }
2123::
1.138 foxr 2124: # This block seems to have code to manage/detect doubly defined
2125: # aliases in maps.
2126:
1.122 albertel 2127: {
2128: my %mapalias_cache;
2129: sub count_mapalias {
2130: my ($value,$resid) = @_;
2131: push(@{ $mapalias_cache{$value} }, $resid);
2132: }
2133:
2134: sub get_mapalias_errors {
2135: my $error_text;
2136: foreach my $mapalias (sort(keys(%mapalias_cache))) {
2137: next if (scalar(@{ $mapalias_cache{$mapalias} } ) == 1);
2138: my $count;
2139: my $which =
2140: join('</li><li>',
2141: map {
2142: my $id = $_;
2143: if (exists($hash{'src_'.$id})) {
2144: $count++;
2145: }
2146: my ($mapid) = split(/\./,$id);
1.147 raeburn 2147: &mt('Resource [_1][_2]in Map [_3]',
2148: $hash{'title_'.$id},'<br />',
1.122 albertel 2149: $hash{'title_'.$hash{'ids_'.$hash{'map_id_'.$mapid}}});
2150: } (@{ $mapalias_cache{$mapalias} }));
2151: next if ($count < 2);
2152: $error_text .= '<div class="LC_error">'.
2153: &mt('Error: Found the mapalias "[_1]" defined multiple times.',
2154: $mapalias).
2155: '</div><ul><li>'.$which.'</li></ul>';
2156: }
2157: &clear_mapalias_count();
2158: return $error_text;
2159: }
2160: sub clear_mapalias_count {
2161: undef(%mapalias_cache);
2162: }
2163: }
1.1 www 2164: 1;
2165: __END__
2166:
1.26 harris41 2167: =head1 NAME
2168:
2169: Apache::lonuserstate - Construct and maintain state and binary representation
2170: of course for user
2171:
2172: =head1 SYNOPSIS
2173:
2174: Invoked by lonroles.pm.
2175:
2176: &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
2177:
2178: =head1 INTRODUCTION
2179:
2180: This module constructs and maintains state and binary representation
2181: of course for user.
2182:
2183: This is part of the LearningOnline Network with CAPA project
2184: described at http://www.lon-capa.org.
2185:
1.129 jms 2186: =head1 SUBROUTINES
1.26 harris41 2187:
1.129 jms 2188: =over
1.26 harris41 2189:
1.129 jms 2190: =item loadmap()
1.26 harris41 2191:
1.129 jms 2192: Loads map from disk
1.26 harris41 2193:
1.129 jms 2194: =item simplify()
1.26 harris41 2195:
1.129 jms 2196: Simplify expression
1.26 harris41 2197:
1.129 jms 2198: =item traceroute()
1.26 harris41 2199:
1.129 jms 2200: Build condition hash
1.26 harris41 2201:
1.129 jms 2202: =item accinit()
1.26 harris41 2203:
1.129 jms 2204: Cascading conditions, quick access, parameters
1.26 harris41 2205:
1.129 jms 2206: =item readmap()
1.26 harris41 2207:
1.129 jms 2208: Read map and all submaps
1.1 www 2209:
1.129 jms 2210: =item evalstate()
1.1 www 2211:
1.129 jms 2212: Evaluate state string
1.1 www 2213:
1.26 harris41 2214: =back
1.1 www 2215:
1.26 harris41 2216: =cut
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