1: # The LearningOnline Network
2: #
3: # $Id: Lond.pm,v 1.8 2015/05/22 21:14:59 raeburn Exp $
4: #
5: # Copyright Michigan State University Board of Trustees
6: #
7: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
8: #
9: # LON-CAPA is free software; you can redistribute it and/or modify
10: # it under the terms of the GNU General Public License as published by
11: # the Free Software Foundation; either version 2 of the License, or
12: # (at your option) any later version.
13: #
14: # LON-CAPA is distributed in the hope that it will be useful,
15: # but WITHOUT ANY WARRANTY; without even the implied warranty of
16: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17: # GNU General Public License for more details.
18: #
19: # You should have received a copy of the GNU General Public License
20: # along with LON-CAPA; if not, write to the Free Software
21: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22: #
23: # /home/httpd/html/adm/gpl.txt
24: #
25: # http://www.lon-capa.org/
26: #
27: ###
28:
29: #NOTE perldoc at the end of file
30: #TODO move remaining lond functions into this
31:
32: package LONCAPA::Lond;
33:
34: use strict;
35: use lib '/home/httpd/lib/perl/';
36:
37: use LONCAPA;
38: use Apache::lonnet;
39: use GDBM_File;
40:
41:
42: sub dump_with_regexp {
43: my ( $tail, $clientversion ) = @_;
44: my ( $udom, $uname, $namespace, $regexp, $range ) =
45: split /:/, $tail;
46:
47: $regexp = $regexp ? unescape($regexp) : '.';
48:
49: my ($start,$end);
50:
51: if (defined($range)) {
52: if ($range =~ /^(\d+)\-(\d+)$/) {
53: ($start,$end) = ($1,$2);
54: } elsif ($range =~/^(\d+)$/) {
55: ($start,$end) = (0,$1);
56: } else {
57: undef($range);
58: }
59: }
60:
61: my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER()) or
62: return "error: ".($!+0)." tie(GDBM) Failed while attempting dump";
63:
64: my $qresult = '';
65: my $count = 0;
66: #
67: # When dump is for roles.db, determine if LON-CAPA version checking is needed.
68: # Sessions on 2.10 and later do not require version checking, as that occurs
69: # on the server hosting the user session, when constructing the roles/courses
70: # screen).
71: #
72: my $skipcheck;
73: my @ids = &Apache::lonnet::current_machine_ids();
74: my (%homecourses, $major, $minor, $now);
75: #
76: # If dump is for roles.db from a pre-2.10 server, determine the LON-CAPA
77: # version on the server which requested the data.
78: #
79: if ($namespace eq 'roles') {
80: if ($clientversion =~ /^\'?(\d+)\.(\d+)\.[\w.\-]+\'?/) {
81: $major = $1;
82: $minor = $2;
83:
84: }
85: if (($major > 2) || (($major == 2) && ($minor > 9))) {
86: $skipcheck = 1;
87: }
88: $now = time;
89: }
90: while (my ($key,$value) = each(%$hashref)) {
91: if ($namespace eq 'roles' && (!$skipcheck)) {
92: if ($key =~ m{^/($LONCAPA::match_domain)/($LONCAPA::match_courseid)(/?[^_]*)_(cc|co|in|ta|ep|ad|st|cr)$}) {
93: my $cdom = $1;
94: my $cnum = $2;
95: my ($role,$roleend,$rolestart) = split(/\_/,$value);
96: if (!$roleend || $roleend > $now) {
97: #
98: # For active course roles, check that requesting server is running a LON-CAPA
99: # version which meets any version requirements for the course. Do not include
100: # the role amongst the results returned if the requesting server's version is
101: # too old.
102: #
103: # This determination is handled differently depending on whether the course's
104: # homeserver is the current server, or whether it is a different server.
105: # In both cases, the course's version requirement needs to be retrieved.
106: #
107: next unless (&releasereqd_check($cnum,$cdom,$key,$value,$major,
108: $minor,\%homecourses,\@ids));
109: }
110: }
111: }
112: if ($regexp eq '.') {
113: $count++;
114: if (defined($range) && $count >= $end) { last; }
115: if (defined($range) && $count < $start) { next; }
116: $qresult.=$key.'='.$value.'&';
117: } else {
118: my $unescapeKey = &unescape($key);
119: if (eval('$unescapeKey=~/$regexp/')) {
120: $count++;
121: if (defined($range) && $count >= $end) { last; }
122: if (defined($range) && $count < $start) { next; }
123: $qresult.="$key=$value&";
124: }
125: }
126: }
127:
128: &untie_user_hash($hashref) or
129: return "error: ".($!+0)." untie(GDBM) Failed while attempting dump";
130: #
131: # If dump is for roles.db from a pre-2.10 server, check if the LON-CAPA
132: # version requirements for courses for which the current server is the home
133: # server permit course roles to be usable on the client server hosting the
134: # user's session. If so, include those role results in the data returned to
135: # the client server.
136: #
137: if (($namespace eq 'roles') && (!$skipcheck)) {
138: if (keys(%homecourses) > 0) {
139: $qresult .= &check_homecourses(\%homecourses,$regexp,$count,
140: $range,$start,$end,$major,$minor);
141: }
142: }
143: chop($qresult);
144: return $qresult;
145: }
146:
147:
148: sub releasereqd_check {
149: my ($cnum,$cdom,$key,$value,$major,$minor,$homecourses,$ids) = @_;
150: my $home = &Apache::lonnet::homeserver($cnum,$cdom);
151: return if ($home eq 'no_host');
152: my ($reqdmajor,$reqdminor,$displayrole);
153: if ($cnum =~ /$LONCAPA::match_community/) {
154: if ($major eq '' && $minor eq '') {
155: return unless ((ref($ids) eq 'ARRAY') &&
156: (grep(/^\Q$home\E$/,@{$ids})));
157: } else {
158: $reqdmajor = 2;
159: $reqdminor = 9;
160: return unless (&useable_role($reqdmajor,$reqdminor,$major,$minor));
161: }
162: }
163: my $hashid = $cdom.':'.$cnum;
164: my ($courseinfo,$cached) =
165: &Apache::lonnet::is_cached_new('courseinfo',$hashid);
166: if (defined($cached)) {
167: if (ref($courseinfo) eq 'HASH') {
168: if (exists($courseinfo->{'releaserequired'})) {
169: my ($reqdmajor,$reqdminor) = split(/\./,$courseinfo->{'releaserequired'});
170: return unless (&useable_role($reqdmajor,$reqdminor,$major,$minor));
171: }
172: }
173: } else {
174: if (ref($ids) eq 'ARRAY') {
175: if (grep(/^\Q$home\E$/,@{$ids})) {
176: if (ref($homecourses) eq 'HASH') {
177: if (ref($homecourses->{$cdom}) eq 'HASH') {
178: if (ref($homecourses->{$cdom}{$cnum}) eq 'HASH') {
179: if (ref($homecourses->{$cdom}{$cnum}) eq 'ARRAY') {
180: push(@{$homecourses->{$cdom}{$cnum}},{$key=>$value});
181: } else {
182: $homecourses->{$cdom}{$cnum} = [{$key=>$value}];
183: }
184: } else {
185: $homecourses->{$cdom}{$cnum} = [{$key=>$value}];
186: }
187: } else {
188: $homecourses->{$cdom}{$cnum} = [{$key=>$value}];
189: }
190: }
191: return;
192: }
193: }
194: my $courseinfo = &get_courseinfo_hash($cnum,$cdom,$home);
195: if (ref($courseinfo) eq 'HASH') {
196: if (exists($courseinfo->{'releaserequired'})) {
197: my ($reqdmajor,$reqdminor) = split(/\./,$courseinfo->{'releaserequired'});
198: return unless (&useable_role($reqdmajor,$reqdminor,$major,$minor));
199: }
200: } else {
201: return;
202: }
203: }
204: return 1;
205: }
206:
207:
208: sub check_homecourses {
209: my ($homecourses,$regexp,$count,$range,$start,$end,$major,$minor) = @_;
210: my ($result,%addtocache);
211: my $yesterday = time - 24*3600;
212: if (ref($homecourses) eq 'HASH') {
213: my (%okcourses,%courseinfo,%recent);
214: foreach my $domain (keys(%{$homecourses})) {
215: my $hashref =
216: &tie_domain_hash($domain, "nohist_courseids", &GDBM_WRCREAT());
217: if (ref($hashref) eq 'HASH') {
218: while (my ($key,$value) = each(%$hashref)) {
219: my $unesc_key = &unescape($key);
220: if ($unesc_key =~ /^lasttime:(\w+)$/) {
221: my $cid = $1;
222: $cid =~ s/_/:/;
223: if ($value > $yesterday ) {
224: $recent{$cid} = 1;
225: }
226: next;
227: }
228: my $items = &Apache::lonnet::thaw_unescape($value);
229: if (ref($items) eq 'HASH') {
230: my ($cdom,$cnum) = split(/_/,$unesc_key);
231: my $hashid = $cdom.':'.$cnum;
232: $courseinfo{$hashid} = $items;
233: if (ref($homecourses->{$cdom}{$cnum}) eq 'ARRAY') {
234: my ($reqdmajor,$reqdminor) = split(/\./,$items->{'releaserequired'});
235: if (&useable_role($reqdmajor,$reqdminor,$major,$minor)) {
236: $okcourses{$hashid} = 1;
237: }
238: }
239: }
240: }
241: unless (&untie_domain_hash($hashref)) {
242: &logthis("Failed to untie tied hash for nohist_courseids.db for $domain");
243: }
244: } else {
245: &logthis("Failed to tie hash for nohist_courseids.db for $domain");
246: }
247: }
248: foreach my $hashid (keys(%recent)) {
249: my ($result,$cached)=&Apache::lonnet::is_cached_new('courseinfo',$hashid);
250: unless ($cached) {
251: &Apache::lonnet::do_cache_new('courseinfo',$hashid,$courseinfo{$hashid},600);
252: }
253: }
254: foreach my $cdom (keys(%{$homecourses})) {
255: if (ref($homecourses->{$cdom}) eq 'HASH') {
256: foreach my $cnum (keys(%{$homecourses->{$cdom}})) {
257: my $hashid = $cdom.':'.$cnum;
258: next if ($recent{$hashid});
259: &Apache::lonnet::do_cache_new('courseinfo',$hashid,$courseinfo{$hashid},600);
260: }
261: }
262: }
263: foreach my $hashid (keys(%okcourses)) {
264: my ($cdom,$cnum) = split(/:/,$hashid);
265: if ((ref($homecourses->{$cdom}) eq 'HASH') &&
266: (ref($homecourses->{$cdom}{$cnum}) eq 'ARRAY')) {
267: foreach my $role (@{$homecourses->{$cdom}{$cnum}}) {
268: if (ref($role) eq 'HASH') {
269: while (my ($key,$value) = each(%{$role})) {
270: if ($regexp eq '.') {
271: $count++;
272: if (defined($range) && $count >= $end) { last; }
273: if (defined($range) && $count < $start) { next; }
274: $result.=$key.'='.$value.'&';
275: } else {
276: my $unescapeKey = &unescape($key);
277: if (eval('$unescapeKey=~/$regexp/')) {
278: $count++;
279: if (defined($range) && $count >= $end) { last; }
280: if (defined($range) && $count < $start) { next; }
281: $result.="$key=$value&";
282: }
283: }
284: }
285: }
286: }
287: }
288: }
289: }
290: return $result;
291: }
292:
293:
294: sub useable_role {
295: my ($reqdmajor,$reqdminor,$major,$minor) = @_;
296: if ($reqdmajor ne '' && $reqdminor ne '') {
297: return if (($major eq '' && $minor eq '') ||
298: ($major < $reqdmajor) ||
299: (($major == $reqdmajor) && ($minor < $reqdminor)));
300: }
301: return 1;
302: }
303:
304:
305: sub get_courseinfo_hash {
306: my ($cnum,$cdom,$home) = @_;
307: my %info;
308: eval {
309: local($SIG{ALRM}) = sub { die "timeout\n"; };
310: local($SIG{__DIE__})='DEFAULT';
311: alarm(3);
312: %info = &Apache::lonnet::courseiddump($cdom,'.',1,'.','.',$cnum,1,[$home],'.');
313: alarm(0);
314: };
315: if ($@) {
316: if ($@ eq "timeout\n") {
317: &logthis("<font color='blue'>WARNING courseiddump for $cnum:$cdom from $home timedout</font>");
318: } else {
319: &logthis("<font color='yellow'>WARNING unexpected error during eval of call for courseiddump from $home</font>");
320: }
321: } else {
322: if (ref($info{$cdom.'_'.$cnum}) eq 'HASH') {
323: my $hashid = $cdom.':'.$cnum;
324: return &Apache::lonnet::do_cache_new('courseinfo',$hashid,$info{$cdom.'_'.$cnum},600);
325: }
326: }
327: return;
328: }
329:
330: sub dump_course_id_handler {
331: my ($tail) = @_;
332:
333: my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
334: $typefilter,$regexp_ok,$rtn_as_hash,$selfenrollonly,$catfilter,$showhidden,
335: $caller,$cloner,$cc_clone_list,$cloneonly,$createdbefore,$createdafter,
336: $creationcontext,$domcloner,$hasuniquecode,$reqcrsdom,$reqinstcode) = split(/:/,$tail);
337: my $now = time;
338: my ($cloneruname,$clonerudom,%cc_clone);
339: if (defined($description)) {
340: $description=&unescape($description);
341: } else {
342: $description='.';
343: }
344: if (defined($instcodefilter)) {
345: $instcodefilter=&unescape($instcodefilter);
346: } else {
347: $instcodefilter='.';
348: }
349: my ($ownerunamefilter,$ownerdomfilter);
350: if (defined($ownerfilter)) {
351: $ownerfilter=&unescape($ownerfilter);
352: if ($ownerfilter ne '.' && defined($ownerfilter)) {
353: if ($ownerfilter =~ /^([^:]*):([^:]*)$/) {
354: $ownerunamefilter = $1;
355: $ownerdomfilter = $2;
356: } else {
357: $ownerunamefilter = $ownerfilter;
358: $ownerdomfilter = '';
359: }
360: }
361: } else {
362: $ownerfilter='.';
363: }
364:
365: if (defined($coursefilter)) {
366: $coursefilter=&unescape($coursefilter);
367: } else {
368: $coursefilter='.';
369: }
370: if (defined($typefilter)) {
371: $typefilter=&unescape($typefilter);
372: } else {
373: $typefilter='.';
374: }
375: if (defined($regexp_ok)) {
376: $regexp_ok=&unescape($regexp_ok);
377: }
378: if (defined($catfilter)) {
379: $catfilter=&unescape($catfilter);
380: }
381: if (defined($cloner)) {
382: $cloner = &unescape($cloner);
383: ($cloneruname,$clonerudom) = ($cloner =~ /^($LONCAPA::match_username):($LONCAPA::match_domain)$/);
384: }
385: if (defined($cc_clone_list)) {
386: $cc_clone_list = &unescape($cc_clone_list);
387: my @cc_cloners = split('&',$cc_clone_list);
388: foreach my $cid (@cc_cloners) {
389: my ($clonedom,$clonenum) = split(':',$cid);
390: next if ($clonedom ne $udom);
391: $cc_clone{$clonedom.'_'.$clonenum} = 1;
392: }
393: }
394: if ($createdbefore ne '') {
395: $createdbefore = &unescape($createdbefore);
396: } else {
397: $createdbefore = 0;
398: }
399: if ($createdafter ne '') {
400: $createdafter = &unescape($createdafter);
401: } else {
402: $createdafter = 0;
403: }
404: if ($creationcontext ne '') {
405: $creationcontext = &unescape($creationcontext);
406: } else {
407: $creationcontext = '.';
408: }
409: unless ($hasuniquecode) {
410: $hasuniquecode = '.';
411: }
412: if ($reqinstcode ne '') {
413: $reqinstcode = &unescape($reqinstcode);
414: }
415: my $unpack = 1;
416: if ($description eq '.' && $instcodefilter eq '.' && $ownerfilter eq '.' &&
417: $typefilter eq '.') {
418: $unpack = 0;
419: }
420: if (!defined($since)) { $since=0; }
421: my (%gotcodedefaults,%otcodedefaults);
422: my $qresult='';
423:
424: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT())
425: or return "error: ".($!+0)." tie(GDBM) Failed while attempting courseiddump";
426:
427: while (my ($key,$value) = each(%$hashref)) {
428: my ($unesc_key,$lasttime_key,$lasttime,$is_hash,%val,
429: %unesc_val,$selfenroll_end,$selfenroll_types,$created,
430: $context);
431: $unesc_key = &unescape($key);
432: if ($unesc_key =~ /^lasttime:/) {
433: next;
434: } else {
435: $lasttime_key = &escape('lasttime:'.$unesc_key);
436: }
437: if ($hashref->{$lasttime_key} ne '') {
438: $lasttime = $hashref->{$lasttime_key};
439: next if ($lasttime<$since);
440: }
441: my ($canclone,$valchange,$clonefromcode);
442: my $items = &Apache::lonnet::thaw_unescape($value);
443: if (ref($items) eq 'HASH') {
444: if ($hashref->{$lasttime_key} eq '') {
445: next if ($since > 1);
446: }
447: if ($items->{'inst_code'}) {
448: $clonefromcode = $items->{'inst_code'};
449: }
450: $is_hash = 1;
451: if ($domcloner) {
452: $canclone = 1;
453: } elsif (defined($clonerudom)) {
454: if ($items->{'cloners'}) {
455: my @cloneable = split(',',$items->{'cloners'});
456: if (@cloneable) {
457: if (grep(/^\*$/,@cloneable)) {
458: $canclone = 1;
459: } elsif (grep(/^\*:\Q$clonerudom\E$/,@cloneable)) {
460: $canclone = 1;
461: } elsif (grep(/^\Q$cloneruname\E:\Q$clonerudom\E$/,@cloneable)) {
462: $canclone = 1;
463: }
464: }
465: unless ($canclone) {
466: if ($cloneruname ne '' && $clonerudom ne '') {
467: if ($cc_clone{$unesc_key}) {
468: $canclone = 1;
469: $items->{'cloners'} .= ','.$cloneruname.':'.
470: $clonerudom;
471: $valchange = 1;
472: }
473: }
474: }
475: unless ($canclone) {
476: if (($reqcrsdom eq $udom) && ($reqinstcode) && ($clonefromcode)) {
477: if (grep(/\=/,@cloneable)) {
478: foreach my $cloner (@cloneable) {
479: if (($cloner ne '*') && ($cloner !~ /^\*\:$LONCAPA::match_domain$/) &&
480: ($cloner !~ /^$LONCAPA::match_username\:$LONCAPA::match_domain$/) && ($cloner ne '')) {
481: if ($cloner =~ /=/) {
482: my (%codedefaults,@code_order);
483: if (ref($gotcodedefaults{$udom}) eq 'HASH') {
484: if (ref($gotcodedefaults{$udom}{'defaults'}) eq 'HASH') {
485: %codedefaults = %{$gotcodedefaults{$udom}{'defaults'}};
486: }
487: if (ref($gotcodedefaults{$udom}{'order'}) eq 'ARRAY') {
488: @code_order = @{$gotcodedefaults{$udom}{'order'}};
489: }
490: } else {
491: &Apache::lonnet::auto_instcode_defaults($udom,
492: \%codedefaults,
493: \@code_order);
494: $gotcodedefaults{$udom}{'defaults'} = \%codedefaults;
495: $gotcodedefaults{$udom}{'order'} = \@code_order;
496: }
497: if (@code_order > 0) {
498: if (&Apache::lonnet::check_instcode_cloning(\%codedefaults,\@code_order,
499: $cloner,$clonefromcode,$reqinstcode)) {
500: $canclone = 1;
501: last;
502: }
503: }
504: }
505: }
506: }
507: }
508: }
509: }
510: } elsif (defined($cloneruname)) {
511: if ($cc_clone{$unesc_key}) {
512: $canclone = 1;
513: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
514: $valchange = 1;
515: }
516: unless ($canclone) {
517: if ($items->{'owner'} =~ /:/) {
518: if ($items->{'owner'} eq $cloner) {
519: $canclone = 1;
520: }
521: } elsif ($cloner eq $items->{'owner'}.':'.$udom) {
522: $canclone = 1;
523: }
524: if ($canclone) {
525: $items->{'cloners'} = $cloneruname.':'.$clonerudom;
526: $valchange = 1;
527: }
528: }
529: }
530: unless (($canclone) || ($items->{'cloners'})) {
531: my %domdefs = &Apache::lonnet::get_domain_defaults($udom);
532: if ($domdefs{'canclone'}) {
533: unless ($domdefs{'canclone'} eq 'none') {
534: if ($domdefs{'canclone'} eq 'domain') {
535: if ($clonerudom eq $udom) {
536: $canclone = 1;
537: }
538: } elsif (($clonefromcode) && ($reqinstcode) &&
539: ($udom eq $reqcrsdom)) {
540: if (&Apache::lonnet::default_instcode_cloning($udom,$domdefs{'canclone'},
541: $clonefromcode,$reqinstcode)) {
542: $canclone = 1;
543: }
544: }
545: }
546: }
547: }
548: }
549: if ($unpack || !$rtn_as_hash) {
550: $unesc_val{'descr'} = $items->{'description'};
551: $unesc_val{'inst_code'} = $items->{'inst_code'};
552: $unesc_val{'owner'} = $items->{'owner'};
553: $unesc_val{'type'} = $items->{'type'};
554: $unesc_val{'cloners'} = $items->{'cloners'};
555: $unesc_val{'created'} = $items->{'created'};
556: $unesc_val{'context'} = $items->{'context'};
557: }
558: $selfenroll_types = $items->{'selfenroll_types'};
559: $selfenroll_end = $items->{'selfenroll_end_date'};
560: $created = $items->{'created'};
561: $context = $items->{'context'};
562: if ($selfenrollonly) {
563: next if (!$selfenroll_types);
564: if (($selfenroll_end > 0) && ($selfenroll_end <= $now)) {
565: next;
566: }
567: }
568: if ($creationcontext ne '.') {
569: next if (($context ne '') && ($context ne $creationcontext));
570: }
571: if ($createdbefore > 0) {
572: next if (($created eq '') || ($created > $createdbefore));
573: }
574: if ($createdafter > 0) {
575: next if (($created eq '') || ($created <= $createdafter));
576: }
577: if ($catfilter ne '') {
578: next if ($items->{'categories'} eq '');
579: my @categories = split('&',$items->{'categories'});
580: next if (@categories == 0);
581: my @subcats = split('&',$catfilter);
582: my $matchcat = 0;
583: foreach my $cat (@categories) {
584: if (grep(/^\Q$cat\E$/,@subcats)) {
585: $matchcat = 1;
586: last;
587: }
588: }
589: next if (!$matchcat);
590: }
591: if ($caller eq 'coursecatalog') {
592: if ($items->{'hidefromcat'} eq 'yes') {
593: next if !$showhidden;
594: }
595: }
596: if ($hasuniquecode ne '.') {
597: next unless ($items->{'uniquecode'});
598: }
599: } else {
600: next if ($catfilter ne '');
601: next if ($selfenrollonly);
602: next if ($createdbefore || $createdafter);
603: next if ($creationcontext ne '.');
604: if ((defined($clonerudom)) && (defined($cloneruname))) {
605: if ($cc_clone{$unesc_key}) {
606: $canclone = 1;
607: $val{'cloners'} = &escape($cloneruname.':'.$clonerudom);
608: }
609: }
610: $is_hash = 0;
611: my @courseitems = split(/:/,$value);
612: $lasttime = pop(@courseitems);
613: if ($hashref->{$lasttime_key} eq '') {
614: next if ($lasttime<$since);
615: }
616: ($val{'descr'},$val{'inst_code'},$val{'owner'},$val{'type'}) = @courseitems;
617: }
618: if ($cloneonly) {
619: next unless ($canclone);
620: }
621: my $match = 1;
622: if ($description ne '.') {
623: if (!$is_hash) {
624: $unesc_val{'descr'} = &unescape($val{'descr'});
625: }
626: if (eval{$unesc_val{'descr'} !~ /\Q$description\E/i}) {
627: $match = 0;
628: }
629: }
630: if ($instcodefilter ne '.') {
631: if (!$is_hash) {
632: $unesc_val{'inst_code'} = &unescape($val{'inst_code'});
633: }
634: if ($regexp_ok == 1) {
635: if (eval{$unesc_val{'inst_code'} !~ /$instcodefilter/}) {
636: $match = 0;
637: }
638: } elsif ($regexp_ok == -1) {
639: if (eval{$unesc_val{'inst_code'} =~ /$instcodefilter/}) {
640: $match = 0;
641: }
642: } else {
643: if (eval{$unesc_val{'inst_code'} !~ /\Q$instcodefilter\E/i}) {
644: $match = 0;
645: }
646: }
647: }
648: if ($ownerfilter ne '.') {
649: if (!$is_hash) {
650: $unesc_val{'owner'} = &unescape($val{'owner'});
651: }
652: if (($ownerunamefilter ne '') && ($ownerdomfilter ne '')) {
653: if ($unesc_val{'owner'} =~ /:/) {
654: if (eval{$unesc_val{'owner'} !~
655: /\Q$ownerunamefilter\E:\Q$ownerdomfilter\E$/i}) {
656: $match = 0;
657: }
658: } else {
659: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
660: $match = 0;
661: }
662: }
663: } elsif ($ownerunamefilter ne '') {
664: if ($unesc_val{'owner'} =~ /:/) {
665: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E:[^:]+$/i}) {
666: $match = 0;
667: }
668: } else {
669: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
670: $match = 0;
671: }
672: }
673: } elsif ($ownerdomfilter ne '') {
674: if ($unesc_val{'owner'} =~ /:/) {
675: if (eval{$unesc_val{'owner'} !~ /^[^:]+:\Q$ownerdomfilter\E/}) {
676: $match = 0;
677: }
678: } else {
679: if ($ownerdomfilter ne $udom) {
680: $match = 0;
681: }
682: }
683: }
684: }
685: if ($coursefilter ne '.') {
686: if (eval{$unesc_key !~ /^$udom(_)\Q$coursefilter\E$/}) {
687: $match = 0;
688: }
689: }
690: if ($typefilter ne '.') {
691: if (!$is_hash) {
692: $unesc_val{'type'} = &unescape($val{'type'});
693: }
694: if ($unesc_val{'type'} eq '') {
695: if ($typefilter ne 'Course') {
696: $match = 0;
697: }
698: } else {
699: if (eval{$unesc_val{'type'} !~ /^\Q$typefilter\E$/}) {
700: $match = 0;
701: }
702: }
703: }
704: if ($match == 1) {
705: if ($rtn_as_hash) {
706: if ($is_hash) {
707: if ($valchange) {
708: my $newvalue = &Apache::lonnet::freeze_escape($items);
709: $qresult.=$key.'='.$newvalue.'&';
710: } else {
711: $qresult.=$key.'='.$value.'&';
712: }
713: } else {
714: my %rtnhash = ( 'description' => &unescape($val{'descr'}),
715: 'inst_code' => &unescape($val{'inst_code'}),
716: 'owner' => &unescape($val{'owner'}),
717: 'type' => &unescape($val{'type'}),
718: 'cloners' => &unescape($val{'cloners'}),
719: );
720: my $items = &Apache::lonnet::freeze_escape(\%rtnhash);
721: $qresult.=$key.'='.$items.'&';
722: }
723: } else {
724: if ($is_hash) {
725: $qresult .= $key.'='.&escape($unesc_val{'descr'}).':'.
726: &escape($unesc_val{'inst_code'}).':'.
727: &escape($unesc_val{'owner'}).'&';
728: } else {
729: $qresult .= $key.'='.$val{'descr'}.':'.$val{'inst_code'}.
730: ':'.$val{'owner'}.'&';
731: }
732: }
733: }
734: }
735: &untie_domain_hash($hashref) or
736: return "error: ".($!+0)." untie(GDBM) Failed while attempting courseiddump";
737:
738: chop($qresult);
739: return $qresult;
740: }
741:
742: sub dump_profile_database {
743: my ($tail) = @_;
744:
745: my ($udom,$uname,$namespace) = split(/:/,$tail);
746:
747: my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER()) or
748: return "error: ".($!+0)." tie(GDBM) Failed while attempting currentdump";
749:
750: # Structure of %data:
751: # $data{$symb}->{$parameter}=$value;
752: # $data{$symb}->{'v.'.$parameter}=$version;
753: # since $parameter will be unescaped, we do not
754: # have to worry about silly parameter names...
755:
756: my $qresult='';
757: my %data = (); # A hash of anonymous hashes..
758: while (my ($key,$value) = each(%$hashref)) {
759: my ($v,$symb,$param) = split(/:/,$key);
760: next if ($v eq 'version' || $symb eq 'keys');
761: next if (exists($data{$symb}) &&
762: exists($data{$symb}->{$param}) &&
763: $data{$symb}->{'v.'.$param} > $v);
764: $data{$symb}->{$param}=$value;
765: $data{$symb}->{'v.'.$param}=$v;
766: }
767:
768: &untie_user_hash($hashref) or
769: return "error: ".($!+0)." untie(GDBM) Failed while attempting currentdump";
770:
771: while (my ($symb,$param_hash) = each(%data)) {
772: while(my ($param,$value) = each (%$param_hash)){
773: next if ($param =~ /^v\./); # Ignore versions...
774: #
775: # Just dump the symb=value pairs separated by &
776: #
777: $qresult.=$symb.':'.$param.'='.$value.'&';
778: }
779: }
780:
781: chop($qresult);
782: return $qresult;
783: }
784:
785:
786: 1;
787:
788: __END__
789:
790: =head1 NAME
791:
792: LONCAPA::Lond.pm
793:
794: =head1 SYNOPSIS
795:
796: #TODO
797:
798: =head1 DESCRIPTION
799:
800: #TODO
801:
802: =head1 METHODS
803:
804: =over 4
805:
806: =item dump_with_regexp( $tail, $client )
807:
808: Dump a profile database with an optional regular expression to match against
809: the keys. In this dump, no effort is made to separate symb from version
810: information. Presumably the databases that are dumped by this command are of a
811: different structure. Need to look at this and improve the documentation of
812: both this and the currentdump handler.
813:
814: $tail a colon separated list containing
815:
816: =over
817:
818: =item domain
819:
820: =item user
821:
822: identifying the user.
823:
824: =item namespace
825:
826: identifying the database.
827:
828: =item regexp
829:
830: optional regular expression that is matched against database keywords to do
831: selective dumps.
832:
833: =item range
834:
835: optional range of entries e.g., 10-20 would return the 10th to 19th items, etc.
836:
837: =back
838:
839: $client is the channel open on the client.
840:
841: Returns: 1 (Continue processing).
842:
843: Side effects: response is written to $client.
844:
845: =item dump_course_id_handler
846:
847: #TODO copy from lond
848:
849: =item dump_profile_database
850:
851: #TODO copy from lond
852:
853: =item releasereqd_check( $cnum, $cdom, $key, $value, $major, $minor,
854: $homecourses, $ids )
855:
856: releasereqd_check() will determine if a LON-CAPA version (defined in the
857: $major,$minor args passed) is not too old to allow use of a role in a
858: course ($cnum,$cdom args passed), if at least one of the following applies:
859: (a) the course is a Community, (b) the course's home server is *not* the
860: current server, or (c) cached course information is not stale.
861:
862: For the case where none of these apply, the course is added to the
863: $homecourse hash ref (keys = courseIDs, values = array of a hash of roles).
864: The $homecourse hash ref is for courses for which the current server is the
865: home server. LON-CAPA version requirements are checked elsewhere for the
866: items in $homecourse.
867:
868:
869: =item check_homecourses( $homecourses, $regexp, $count, $range, $start, $end,
870: $major, $minor )
871:
872: check_homecourses() will retrieve course information for those courses which
873: are keys of the $homecourses hash ref (first arg). The nohist_courseids.db
874: GDBM file is tied and course information for each course retrieved. Last
875: visit (lasttime key) is also retrieved for each, and cached values updated
876: for any courses last visited less than 24 hours ago. Cached values are also
877: updated for any courses included in the $homecourses hash ref.
878:
879: The reason for the 24 hours constraint is that the cron entry in
880: /etc/cron.d/loncapa for /home/httpd/perl/refresh_courseids_db.pl causes
881: cached course information to be updated nightly for courses with activity
882: within the past 24 hours.
883:
884: Role information for the user (included in a ref to an array of hashes as the
885: value for each key in $homecourses) is appended to the result returned by the
886: routine, which will in turn be appended to the string returned to the client
887: hosting the user's session.
888:
889:
890: =item useable_role( $reqdmajor, $reqdminor, $major, $minor )
891:
892: useable_role() will compare the LON-CAPA version required by a course with
893: the version available on the client server. If the client server's version
894: is compatible, 1 will be returned.
895:
896:
897: =item get_courseinfo_hash( $cnum, $cdom, $home )
898:
899: get_courseinfo_hash() is used to retrieve course information from the db
900: file: nohist_courseids.db for a course for which the current server is *not*
901: the home server.
902:
903: A hash of a hash will be retrieved. The outer hash contains a single key --
904: courseID -- for the course for which the data are being requested.
905: The contents of the inner hash, for that single item in the outer hash
906: are returned (and cached in memcache for 10 minutes).
907:
908:
909:
910: =back
911:
912: =head1 BUGS
913:
914: No known bugs at this time.
915:
916: =head1 SEE ALSO
917:
918: L<Apache::lonnet>, L<lond>
919:
920: =cut
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to Lond.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom