1: # The LearningOnline Network with CAPA
2: #
3: # $Id: loncoursedata.pm,v 1.90 2003/09/26 19:23:14 matthew 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: =pod
30:
31: =head1 NAME
32:
33: loncoursedata
34:
35: =head1 SYNOPSIS
36:
37: Set of functions that download and process student and course information.
38:
39: =head1 PACKAGES USED
40:
41: Apache::Constants qw(:common :http)
42: Apache::lonnet()
43: Apache::lonhtmlcommon
44: HTML::TokeParser
45: GDBM_File
46:
47: =cut
48:
49: package Apache::loncoursedata;
50:
51: use strict;
52: use Apache::Constants qw(:common :http);
53: use Apache::lonnet();
54: use Apache::lonhtmlcommon;
55: use Time::HiRes;
56: use Apache::lonmysql;
57: use HTML::TokeParser;
58: use GDBM_File;
59:
60: =pod
61:
62: =head1 DOWNLOAD INFORMATION
63:
64: This section contains all the functions that get data from other servers
65: and/or itself.
66:
67: =cut
68:
69: ####################################################
70: ####################################################
71:
72: =pod
73:
74: =item &get_sequence_assessment_data()
75:
76: AT THIS TIME THE USE OF THIS FUNCTION IS *NOT* RECOMMENDED
77:
78: Use lonnavmaps to build a data structure describing the order and
79: assessment contents of each sequence in the current course.
80:
81: The returned structure is a hash reference.
82:
83: { title => 'title',
84: symb => 'symb',
85: src => '/s/o/u/r/c/e',
86: type => (container|assessment),
87: num_assess => 2, # only for container
88: parts => [11,13,15], # only for assessment
89: response_ids => [12,14,16], # only for assessment
90: contents => [........] # only for container
91: }
92:
93: $hash->{'contents'} is a reference to an array of hashes of the same structure.
94:
95: Also returned are array references to the sequences and assessments contained
96: in the course.
97:
98:
99: =cut
100:
101: ####################################################
102: ####################################################
103: sub get_sequence_assessment_data {
104: my $fn=$ENV{'request.course.fn'};
105: ##
106: ## use navmaps
107: my $navmap = Apache::lonnavmaps::navmap->new();
108: if (!defined($navmap)) {
109: return 'Can not open Coursemap';
110: }
111: # We explicity grab the top level map because I am not sure we
112: # are pulling it from the iterator.
113: my $top_level_map = $navmap->getById('0.0');
114: #
115: my $iterator = $navmap->getIterator(undef, undef, undef, 1);
116: my $curRes = $iterator->next(); # Top level sequence
117: ##
118: ## Prime the pump
119: ##
120: ## We are going to loop until we run out of sequences/pages to explore for
121: ## resources. This means we have to start out with something to look
122: ## at.
123: my $title = $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
124: my $symb = $top_level_map->symb();
125: my $src = $top_level_map->src();
126: my $randompick = $top_level_map->randompick();
127: #
128: my @Sequences;
129: my @Assessments;
130: my @Nested_Sequences = (); # Stack of sequences, keeps track of depth
131: my $top = { title => $title,
132: src => $src,
133: symb => $symb,
134: type => 'container',
135: num_assess => 0,
136: num_assess_parts => 0,
137: contents => [],
138: randompick => $randompick,
139: };
140: push (@Sequences,$top);
141: push (@Nested_Sequences, $top);
142: #
143: # We need to keep track of which sequences contain homework problems
144: #
145: my $previous_too;
146: my $previous;
147: while (scalar(@Nested_Sequences)) {
148: $previous_too = $previous;
149: $previous = $curRes;
150: $curRes = $iterator->next();
151: my $currentmap = $Nested_Sequences[-1]; # Last one on the stack
152: if ($curRes == $iterator->BEGIN_MAP()) {
153: if (! ref($previous)) {
154: $previous = $previous_too;
155: }
156: if (! ref($previous)) {
157: next;
158: }
159: # get the map itself, instead of BEGIN_MAP
160: $title = $previous->title();
161: $title =~ s/\:/\&\#058;/g;
162: $symb = $previous->symb();
163: $src = $previous->src();
164: # pick up the filename if there is no title available
165: if (! defined($title) || $title eq '') {
166: ($title) = ($src=~/\/([^\/]*)$/);
167: }
168: $randompick = $previous->randompick();
169: my $newmap = { title => $title,
170: src => $src,
171: symb => $symb,
172: type => 'container',
173: num_assess => 0,
174: randompick => $randompick,
175: contents => [],
176: };
177: push (@{$currentmap->{'contents'}},$newmap); # this is permanent
178: push (@Sequences,$newmap);
179: push (@Nested_Sequences, $newmap); # this is a stack
180: next;
181: }
182: if ($curRes == $iterator->END_MAP()) {
183: pop(@Nested_Sequences);
184: next;
185: }
186: next if (! ref($curRes));
187: next if (! $curRes->is_problem());# && !$curRes->randomout);
188: # Okay, from here on out we only deal with assessments
189: $title = $curRes->title();
190: $title =~ s/\:/\&\#058;/g;
191: $symb = $curRes->symb();
192: $src = $curRes->src();
193: my $parts = $curRes->parts();
194: my %partdata;
195: foreach my $part (@$parts) {
196: my @Responses = $curRes->responseType($part);
197: my @Ids = $curRes->responseIds($part);
198: $partdata{$part}->{'ResponseTypes'}= \@Responses;
199: $partdata{$part}->{'ResponseIds'} = \@Ids;
200: }
201: my $assessment = { title => $title,
202: src => $src,
203: symb => $symb,
204: type => 'assessment',
205: parts => $parts,
206: num_parts => scalar(@$parts),
207: partdata => \%partdata,
208: };
209: push(@Assessments,$assessment);
210: push(@{$currentmap->{'contents'}},$assessment);
211: $currentmap->{'num_assess'}++;
212: $currentmap->{'num_assess_parts'}+= scalar(@$parts);
213: }
214: $navmap->untieHashes();
215: return ($top,\@Sequences,\@Assessments);
216: }
217:
218: sub LoadDiscussion {
219: my ($courseID)=@_;
220: my %Discuss=();
221: my %contrib=&Apache::lonnet::dump(
222: $courseID,
223: $ENV{'course.'.$courseID.'.domain'},
224: $ENV{'course.'.$courseID.'.num'});
225:
226: #my %contrib=&DownloadCourseInformation($name, $courseID, 0);
227:
228: foreach my $temp(keys %contrib) {
229: if ($temp=~/^version/) {
230: my $ver=$contrib{$temp};
231: my ($dummy,$prb)=split(':',$temp);
232: for (my $idx=1; $idx<=$ver; $idx++ ) {
233: my $name=$contrib{"$idx:$prb:sendername"};
234: $Discuss{"$name:$prb"}=$idx;
235: }
236: }
237: }
238:
239: return \%Discuss;
240: }
241:
242: ################################################
243: ################################################
244:
245: =pod
246:
247: =item &GetUserName(username,userdomain)
248:
249: Returns a hash with the following entries:
250: 'firstname', 'middlename', 'lastname', 'generation', and 'fullname'
251:
252: 'fullname' is the result of &Apache::loncoursedata::ProcessFullName.
253:
254: =cut
255:
256: ################################################
257: ################################################
258: sub GetUserName {
259: my ($username,$userdomain) = @_;
260: $username = $ENV{'user.name'} if (! defined($username));
261: $userdomain = $ENV{'user.domain'} if (! defined($username));
262: my %userenv = &Apache::lonnet::get('environment',
263: ['firstname','middlename','lastname','generation'],
264: $userdomain,$username);
265: $userenv{'fullname'} = &ProcessFullName($userenv{'lastname'},
266: $userenv{'generation'},
267: $userenv{'firstname'},
268: $userenv{'middlename'});
269: return %userenv;
270: }
271:
272: ################################################
273: ################################################
274:
275: =pod
276:
277: =item &ProcessFullName()
278:
279: Takes lastname, generation, firstname, and middlename (or some partial
280: set of this data) and returns the full name version as a string. Format
281: is Lastname generation, firstname middlename or a subset of this.
282:
283: =cut
284:
285: ################################################
286: ################################################
287: sub ProcessFullName {
288: my ($lastname, $generation, $firstname, $middlename)=@_;
289: my $Str = '';
290:
291: # Strip whitespace preceeding & following name components.
292: $lastname =~ s/(\s+$|^\s+)//g;
293: $generation =~ s/(\s+$|^\s+)//g;
294: $firstname =~ s/(\s+$|^\s+)//g;
295: $middlename =~ s/(\s+$|^\s+)//g;
296:
297: if($lastname ne '') {
298: $Str .= $lastname;
299: $Str .= ' '.$generation if ($generation ne '');
300: $Str .= ',';
301: $Str .= ' '.$firstname if ($firstname ne '');
302: $Str .= ' '.$middlename if ($middlename ne '');
303: } else {
304: $Str .= $firstname if ($firstname ne '');
305: $Str .= ' '.$middlename if ($middlename ne '');
306: $Str .= ' '.$generation if ($generation ne '');
307: }
308:
309: return $Str;
310: }
311:
312: ################################################
313: ################################################
314:
315: =pod
316:
317: =item &make_into_hash($values);
318:
319: Returns a reference to a hash as described by $values. $values is
320: assumed to be the result of
321: join(':',map {&Apache::lonnet::escape($_)} %orighash);
322:
323: This is a helper function for get_current_state.
324:
325: =cut
326:
327: ################################################
328: ################################################
329: sub make_into_hash {
330: my $values = shift;
331: my %tmp = map { &Apache::lonnet::unescape($_); }
332: split(':',$values);
333: return \%tmp;
334: }
335:
336:
337: ################################################
338: ################################################
339:
340: =pod
341:
342: =head1 LOCAL DATA CACHING SUBROUTINES
343:
344: The local caching is done using MySQL. There is no fall-back implementation
345: if MySQL is not running.
346:
347: The programmers interface is to call &get_current_state() or some other
348: primary interface subroutine (described below). The internals of this
349: storage system are documented here.
350:
351: There are six tables used to store student performance data (the results of
352: a dumpcurrent). Each of these tables is created in MySQL with a name of
353: $courseid_*****, where ***** is 'symb', 'part', or whatever is appropriate
354: for the table. The tables and their purposes are described below.
355:
356: Some notes before we get started.
357:
358: Each table must have a PRIMARY KEY, which is a column or set of columns which
359: will serve to uniquely identify a row of data. NULL is not allowed!
360:
361: INDEXes work best on integer data.
362:
363: JOIN is used to combine data from many tables into one output.
364:
365: lonmysql.pm is used for some of the interface, specifically the table creation
366: calls. The inserts are done in bulk by directly calling the database handler.
367: The SELECT ... JOIN statement used to retrieve the data does not have an
368: interface in lonmysql.pm and I shudder at the thought of writing one.
369:
370: =head3 Table Descriptions
371:
372: =over 4
373:
374: =item Tables used to store meta information
375:
376: The following tables hold data required to keep track of the current status
377: of a students data in the tables or to look up the students data in the tables.
378:
379: =over 4
380:
381: =item $symb_table
382:
383: The symb_table has two columns. The first is a 'symb_id' and the second
384: is the text name for the 'symb' (limited to 64k). The 'symb_id' is generated
385: automatically by MySQL so inserts should be done on this table with an
386: empty first element. This table has its PRIMARY KEY on the 'symb_id'.
387:
388: =item $part_table
389:
390: The part_table has two columns. The first is a 'part_id' and the second
391: is the text name for the 'part' (limited to 100 characters). The 'part_id' is
392: generated automatically by MySQL so inserts should be done on this table with
393: an empty first element. This table has its PRIMARY KEY on the 'part' (100
394: characters) and a KEY on 'part_id'.
395:
396: =item $student_table
397:
398: The student_table has two columns. The first is a 'student_id' and the second
399: is the text description of the 'student' (typically username:domain) (less
400: than 100 characters). The 'student_id' is automatically generated by MySQL.
401: The use of the name 'student_id' is loaded, I know, but this ID is used ONLY
402: internally to the MySQL database and is not the same as the students ID
403: (stored in the students environment). This table has its PRIMARY KEY on the
404: 'student' (100 characters).
405:
406: =item $studentdata_table
407:
408: The studentdata_table has four columns: 'student_id' (the unique id of
409: the student), 'updatetime' (the time the students data was last updated),
410: 'fullupdatetime' (the time the students full data was last updated),
411: 'section', and 'classification'( the students current classification).
412: This table has its PRIMARY KEY on 'student_id'.
413:
414: =back
415:
416: =item Tables used to store current status data
417:
418: The following tables store data only about the students current status on
419: a problem, meaning only the data related to the last attempt on a problem.
420:
421: =over 4
422:
423: =item $performance_table
424:
425: The performance_table has 9 columns. The first three are 'symb_id',
426: 'student_id', and 'part_id'. These comprise the PRIMARY KEY for this table
427: and are directly related to the $symb_table, $student_table, and $part_table
428: described above. MySQL does better indexing on numeric items than text,
429: so we use these three "index tables". The remaining columns are
430: 'solved', 'tries', 'awarded', 'award', 'awarddetail', and 'timestamp'.
431: These are either the MySQL type TINYTEXT or various integers ('tries' and
432: 'timestamp'). This table has KEYs of 'student_id' and 'symb_id'.
433: For use of this table, see the functions described below.
434:
435: =item $parameters_table
436:
437: The parameters_table holds the data that does not fit neatly into the
438: performance_table. The parameters table has four columns: 'symb_id',
439: 'student_id', 'parameter', and 'value'. 'symb_id', 'student_id', and
440: 'parameter' comprise the PRIMARY KEY for this table. 'parameter' is
441: limited to 255 characters. 'value' is limited to 64k characters.
442:
443: =back
444:
445: =item Tables used for storing historic data
446:
447: The following tables are used to store almost all of the transactions a student
448: has made on a homework problem. See loncapa/docs/homework/datastorage for
449: specific information about each of the parameters stored.
450:
451: =over 4
452:
453: =item $fulldump_response_table
454:
455: The response table holds data (documented in loncapa/docs/homework/datastorage)
456: associated with a particular response id which is stored when a student
457: attempts a problem. The following are the columns of the table, in order:
458: 'symb_id','part_id','response_id','student_id','transaction','tries',
459: 'awarddetail', 'awarded','response_specific' (data particular to the response
460: type), 'response_specific_value', and 'submission (the text of the students
461: submission). The primary key is based on the first five columns listed above.
462:
463: =item $fulldump_part_table
464:
465: The part table holds data (documented in loncapa/docs/homework/datastorage)
466: associated with a particular part id which is stored when a student attempts
467: a problem. The following are the columns of the table, in order:
468: 'symb_id','part_id','student_id','transaction','tries','award','awarded',
469: and 'previous'. The primary key is based on the first five columns listed
470: above.
471:
472: =item $fulldump_timestamp_table
473:
474: The timestamp table holds the timestamps of the transactions which are
475: stored in $fulldump_response_table and $fulldump_part_table. This data is
476: about both the response and part data. Columns: 'symb_id','student_id',
477: 'transaction', and 'timestamp'.
478: The primary key is based on the first 3 columns.
479:
480: =back
481:
482: =back
483:
484: =head3 Important Subroutines
485:
486: Here is a brief overview of the subroutines which are likely to be of
487: interest:
488:
489: =over 4
490:
491: =item &get_current_state(): programmers interface.
492:
493: =item &init_dbs(): table creation
494:
495: =item &update_student_data(): data storage calls
496:
497: =item &get_student_data_from_performance_cache(): data retrieval
498:
499: =back
500:
501: =head3 Main Documentation
502:
503: =over 4
504:
505: =cut
506:
507: ################################################
508: ################################################
509:
510: ################################################
511: ################################################
512: { # Begin scope of table identifiers
513:
514: my $current_course ='';
515: my $symb_table;
516: my $part_table;
517: my $student_table;
518: my $studentdata_table;
519: my $performance_table;
520: my $parameters_table;
521: my $fulldump_response_table;
522: my $fulldump_part_table;
523: my $fulldump_timestamp_table;
524:
525: my @Tables;
526: ################################################
527: ################################################
528:
529: =pod
530:
531: =item &init_dbs()
532:
533: Input: course id
534:
535: Output: 0 on success, positive integer on error
536:
537: This routine issues the calls to lonmysql to create the tables used to
538: store student data.
539:
540: =cut
541:
542: ################################################
543: ################################################
544: sub init_dbs {
545: my $courseid = shift;
546: &setup_table_names($courseid);
547: #
548: # Drop any of the existing tables
549: foreach my $table (@Tables) {
550: &Apache::lonmysql::drop_table($table);
551: }
552: #
553: # Note - changes to this table must be reflected in the code that
554: # stores the data (calls &Apache::lonmysql::store_row with this table
555: # id
556: my $symb_table_def = {
557: id => $symb_table,
558: permanent => 'no',
559: columns => [{ name => 'symb_id',
560: type => 'MEDIUMINT UNSIGNED',
561: restrictions => 'NOT NULL',
562: auto_inc => 'yes', },
563: { name => 'symb',
564: type => 'MEDIUMTEXT',
565: restrictions => 'NOT NULL'},
566: ],
567: 'PRIMARY KEY' => ['symb_id'],
568: };
569: #
570: my $part_table_def = {
571: id => $part_table,
572: permanent => 'no',
573: columns => [{ name => 'part_id',
574: type => 'MEDIUMINT UNSIGNED',
575: restrictions => 'NOT NULL',
576: auto_inc => 'yes', },
577: { name => 'part',
578: type => 'VARCHAR(100)',
579: restrictions => 'NOT NULL'},
580: ],
581: 'PRIMARY KEY' => ['part (100)'],
582: 'KEY' => [{ columns => ['part_id']},],
583: };
584: #
585: my $student_table_def = {
586: id => $student_table,
587: permanent => 'no',
588: columns => [{ name => 'student_id',
589: type => 'MEDIUMINT UNSIGNED',
590: restrictions => 'NOT NULL',
591: auto_inc => 'yes', },
592: { name => 'student',
593: type => 'VARCHAR(100)',
594: restrictions => 'NOT NULL'},
595: { name => 'classification',
596: type => 'varchar(100)', },
597: ],
598: 'PRIMARY KEY' => ['student (100)'],
599: 'KEY' => [{ columns => ['student_id']},],
600: };
601: #
602: my $studentdata_table_def = {
603: id => $studentdata_table,
604: permanent => 'no',
605: columns => [{ name => 'student_id',
606: type => 'MEDIUMINT UNSIGNED',
607: restrictions => 'NOT NULL UNIQUE',},
608: { name => 'updatetime',
609: type => 'INT UNSIGNED'},
610: { name => 'fullupdatetime',
611: type => 'INT UNSIGNED'},
612: { name => 'section',
613: type => 'VARCHAR(100)'},
614: { name => 'classification',
615: type => 'VARCHAR(100)', },
616: ],
617: 'PRIMARY KEY' => ['student_id'],
618: };
619: #
620: my $performance_table_def = {
621: id => $performance_table,
622: permanent => 'no',
623: columns => [{ name => 'symb_id',
624: type => 'MEDIUMINT UNSIGNED',
625: restrictions => 'NOT NULL' },
626: { name => 'student_id',
627: type => 'MEDIUMINT UNSIGNED',
628: restrictions => 'NOT NULL' },
629: { name => 'part_id',
630: type => 'MEDIUMINT UNSIGNED',
631: restrictions => 'NOT NULL' },
632: { name => 'part',
633: type => 'VARCHAR(100)',
634: restrictions => 'NOT NULL'},
635: { name => 'solved',
636: type => 'TINYTEXT' },
637: { name => 'tries',
638: type => 'SMALLINT UNSIGNED' },
639: { name => 'awarded',
640: type => 'TINYTEXT' },
641: { name => 'award',
642: type => 'TINYTEXT' },
643: { name => 'awarddetail',
644: type => 'TINYTEXT' },
645: { name => 'timestamp',
646: type => 'INT UNSIGNED'},
647: ],
648: 'PRIMARY KEY' => ['symb_id','student_id','part_id'],
649: 'KEY' => [{ columns=>['student_id'] },
650: { columns=>['symb_id'] },],
651: };
652: #
653: my $fulldump_part_table_def = {
654: id => $fulldump_part_table,
655: permanent => 'no',
656: columns => [
657: { name => 'symb_id',
658: type => 'MEDIUMINT UNSIGNED',
659: restrictions => 'NOT NULL' },
660: { name => 'part_id',
661: type => 'MEDIUMINT UNSIGNED',
662: restrictions => 'NOT NULL' },
663: { name => 'student_id',
664: type => 'MEDIUMINT UNSIGNED',
665: restrictions => 'NOT NULL' },
666: { name => 'transaction',
667: type => 'MEDIUMINT UNSIGNED',
668: restrictions => 'NOT NULL' },
669: { name => 'tries',
670: type => 'SMALLINT UNSIGNED',
671: restrictions => 'NOT NULL' },
672: { name => 'award',
673: type => 'TINYTEXT' },
674: { name => 'awarded',
675: type => 'TINYTEXT' },
676: { name => 'previous',
677: type => 'SMALLINT UNSIGNED' },
678: # { name => 'regrader',
679: # type => 'TINYTEXT' },
680: # { name => 'afterduedate',
681: # type => 'TINYTEXT' },
682: ],
683: 'PRIMARY KEY' => ['symb_id','part_id','student_id','transaction'],
684: 'KEY' => [
685: { columns=>['symb_id'] },
686: { columns=>['part_id'] },
687: { columns=>['student_id'] },
688: ],
689: };
690: #
691: my $fulldump_response_table_def = {
692: id => $fulldump_response_table,
693: permanent => 'no',
694: columns => [
695: { name => 'symb_id',
696: type => 'MEDIUMINT UNSIGNED',
697: restrictions => 'NOT NULL' },
698: { name => 'part_id',
699: type => 'MEDIUMINT UNSIGNED',
700: restrictions => 'NOT NULL' },
701: { name => 'response_id',
702: type => 'MEDIUMINT UNSIGNED',
703: restrictions => 'NOT NULL' },
704: { name => 'student_id',
705: type => 'MEDIUMINT UNSIGNED',
706: restrictions => 'NOT NULL' },
707: { name => 'transaction',
708: type => 'MEDIUMINT UNSIGNED',
709: restrictions => 'NOT NULL' },
710: { name => 'tries',
711: type => 'SMALLINT UNSIGNED',
712: restrictions => 'NOT NULL' },
713: { name => 'awarddetail',
714: type => 'TINYTEXT' },
715: { name => 'awarded',
716: type => 'TINYTEXT' },
717: # { name => 'message',
718: # type => 'CHAR' },
719: { name => 'response_specific',
720: type => 'TINYTEXT' },
721: { name => 'response_specific_value',
722: type => 'TINYTEXT' },
723: { name => 'submission',
724: type => 'TEXT'},
725: ],
726: 'PRIMARY KEY' => ['symb_id','part_id','response_id','student_id',
727: 'transaction'],
728: 'KEY' => [
729: { columns=>['symb_id'] },
730: { columns=>['part_id','response_id'] },
731: { columns=>['student_id'] },
732: ],
733: };
734: my $fulldump_timestamp_table_def = {
735: id => $fulldump_timestamp_table,
736: permanent => 'no',
737: columns => [
738: { name => 'symb_id',
739: type => 'MEDIUMINT UNSIGNED',
740: restrictions => 'NOT NULL' },
741: { name => 'student_id',
742: type => 'MEDIUMINT UNSIGNED',
743: restrictions => 'NOT NULL' },
744: { name => 'transaction',
745: type => 'MEDIUMINT UNSIGNED',
746: restrictions => 'NOT NULL' },
747: { name => 'timestamp',
748: type => 'INT UNSIGNED'},
749: ],
750: 'PRIMARY KEY' => ['symb_id','student_id','transaction'],
751: 'KEY' => [
752: { columns=>['symb_id'] },
753: { columns=>['student_id'] },
754: { columns=>['transaction'] },
755: ],
756: };
757:
758: #
759: my $parameters_table_def = {
760: id => $parameters_table,
761: permanent => 'no',
762: columns => [{ name => 'symb_id',
763: type => 'MEDIUMINT UNSIGNED',
764: restrictions => 'NOT NULL' },
765: { name => 'student_id',
766: type => 'MEDIUMINT UNSIGNED',
767: restrictions => 'NOT NULL' },
768: { name => 'parameter',
769: type => 'TINYTEXT',
770: restrictions => 'NOT NULL' },
771: { name => 'value',
772: type => 'MEDIUMTEXT' },
773: ],
774: 'PRIMARY KEY' => ['symb_id','student_id','parameter (255)'],
775: };
776: #
777: # Create the tables
778: my $tableid;
779: $tableid = &Apache::lonmysql::create_table($symb_table_def);
780: if (! defined($tableid)) {
781: &Apache::lonnet::logthis("error creating symb_table: ".
782: &Apache::lonmysql::get_error());
783: return 1;
784: }
785: #
786: $tableid = &Apache::lonmysql::create_table($part_table_def);
787: if (! defined($tableid)) {
788: &Apache::lonnet::logthis("error creating part_table: ".
789: &Apache::lonmysql::get_error());
790: return 2;
791: }
792: #
793: $tableid = &Apache::lonmysql::create_table($student_table_def);
794: if (! defined($tableid)) {
795: &Apache::lonnet::logthis("error creating student_table: ".
796: &Apache::lonmysql::get_error());
797: return 3;
798: }
799: #
800: $tableid = &Apache::lonmysql::create_table($studentdata_table_def);
801: if (! defined($tableid)) {
802: &Apache::lonnet::logthis("error creating studentdata_table: ".
803: &Apache::lonmysql::get_error());
804: return 4;
805: }
806: #
807: $tableid = &Apache::lonmysql::create_table($performance_table_def);
808: if (! defined($tableid)) {
809: &Apache::lonnet::logthis("error creating preformance_table: ".
810: &Apache::lonmysql::get_error());
811: return 5;
812: }
813: #
814: $tableid = &Apache::lonmysql::create_table($parameters_table_def);
815: if (! defined($tableid)) {
816: &Apache::lonnet::logthis("error creating parameters_table: ".
817: &Apache::lonmysql::get_error());
818: return 6;
819: }
820: #
821: $tableid = &Apache::lonmysql::create_table($fulldump_part_table_def);
822: if (! defined($tableid)) {
823: &Apache::lonnet::logthis("error creating fulldump_part_table: ".
824: &Apache::lonmysql::get_error());
825: return 7;
826: }
827: #
828: $tableid = &Apache::lonmysql::create_table($fulldump_response_table_def);
829: if (! defined($tableid)) {
830: &Apache::lonnet::logthis("error creating fulldump_response_table: ".
831: &Apache::lonmysql::get_error());
832: return 8;
833: }
834: $tableid = &Apache::lonmysql::create_table($fulldump_timestamp_table_def);
835: if (! defined($tableid)) {
836: &Apache::lonnet::logthis("error creating fulldump_timestamp_table: ".
837: &Apache::lonmysql::get_error());
838: return 9;
839: }
840: return 0;
841: }
842:
843: ################################################
844: ################################################
845:
846: =pod
847:
848: =item &delete_caches()
849:
850: =cut
851:
852: ################################################
853: ################################################
854: sub delete_caches {
855: my $courseid = shift;
856: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
857: #
858: &setup_table_names($courseid);
859: #
860: my $dbh = &Apache::lonmysql::get_dbh();
861: foreach my $table (@Tables) {
862: my $command = 'DROP TABLE '.$table.';';
863: $dbh->do($command);
864: if ($dbh->err) {
865: &Apache::lonnet::logthis($command.' resulted in error: '.$dbh->errstr);
866: }
867: }
868: return;
869: }
870:
871: ################################################
872: ################################################
873:
874: =pod
875:
876: =item &get_part_id()
877:
878: Get the MySQL id of a problem part string.
879:
880: Input: $part
881:
882: Output: undef on error, integer $part_id on success.
883:
884: =item &get_part()
885:
886: Get the string describing a part from the MySQL id of the problem part.
887:
888: Input: $part_id
889:
890: Output: undef on error, $part string on success.
891:
892: =cut
893:
894: ################################################
895: ################################################
896:
897: my $have_read_part_table = 0;
898: my %ids_by_part;
899: my %parts_by_id;
900:
901: sub get_part_id {
902: my ($part) = @_;
903: $part = 0 if (! defined($part));
904: if (! $have_read_part_table) {
905: my @Result = &Apache::lonmysql::get_rows($part_table);
906: foreach (@Result) {
907: $ids_by_part{$_->[1]}=$_->[0];
908: }
909: $have_read_part_table = 1;
910: }
911: if (! exists($ids_by_part{$part})) {
912: &Apache::lonmysql::store_row($part_table,[undef,$part]);
913: undef(%ids_by_part);
914: my @Result = &Apache::lonmysql::get_rows($part_table);
915: foreach (@Result) {
916: $ids_by_part{$_->[1]}=$_->[0];
917: }
918: }
919: return $ids_by_part{$part} if (exists($ids_by_part{$part}));
920: return undef; # error
921: }
922:
923: sub get_part {
924: my ($part_id) = @_;
925: if (! exists($parts_by_id{$part_id}) ||
926: ! defined($parts_by_id{$part_id}) ||
927: $parts_by_id{$part_id} eq '') {
928: my @Result = &Apache::lonmysql::get_rows($part_table);
929: foreach (@Result) {
930: $parts_by_id{$_->[0]}=$_->[1];
931: }
932: }
933: return $parts_by_id{$part_id} if(exists($parts_by_id{$part_id}));
934: return undef; # error
935: }
936:
937: ################################################
938: ################################################
939:
940: =pod
941:
942: =item &get_symb_id()
943:
944: Get the MySQL id of a symb.
945:
946: Input: $symb
947:
948: Output: undef on error, integer $symb_id on success.
949:
950: =item &get_symb()
951:
952: Get the symb associated with a MySQL symb_id.
953:
954: Input: $symb_id
955:
956: Output: undef on error, $symb on success.
957:
958: =cut
959:
960: ################################################
961: ################################################
962:
963: my $have_read_symb_table = 0;
964: my %ids_by_symb;
965: my %symbs_by_id;
966:
967: sub get_symb_id {
968: my ($symb) = @_;
969: if (! $have_read_symb_table) {
970: my @Result = &Apache::lonmysql::get_rows($symb_table);
971: foreach (@Result) {
972: $ids_by_symb{$_->[1]}=$_->[0];
973: }
974: $have_read_symb_table = 1;
975: }
976: if (! exists($ids_by_symb{$symb})) {
977: &Apache::lonmysql::store_row($symb_table,[undef,$symb]);
978: undef(%ids_by_symb);
979: my @Result = &Apache::lonmysql::get_rows($symb_table);
980: foreach (@Result) {
981: $ids_by_symb{$_->[1]}=$_->[0];
982: }
983: }
984: return $ids_by_symb{$symb} if(exists( $ids_by_symb{$symb}));
985: return undef; # error
986: }
987:
988: sub get_symb {
989: my ($symb_id) = @_;
990: if (! exists($symbs_by_id{$symb_id}) ||
991: ! defined($symbs_by_id{$symb_id}) ||
992: $symbs_by_id{$symb_id} eq '') {
993: my @Result = &Apache::lonmysql::get_rows($symb_table);
994: foreach (@Result) {
995: $symbs_by_id{$_->[0]}=$_->[1];
996: }
997: }
998: return $symbs_by_id{$symb_id} if(exists( $symbs_by_id{$symb_id}));
999: return undef; # error
1000: }
1001:
1002: ################################################
1003: ################################################
1004:
1005: =pod
1006:
1007: =item &get_student_id()
1008:
1009: Get the MySQL id of a student.
1010:
1011: Input: $sname, $dom
1012:
1013: Output: undef on error, integer $student_id on success.
1014:
1015: =item &get_student()
1016:
1017: Get student username:domain associated with the MySQL student_id.
1018:
1019: Input: $student_id
1020:
1021: Output: undef on error, string $student (username:domain) on success.
1022:
1023: =cut
1024:
1025: ################################################
1026: ################################################
1027:
1028: my $have_read_student_table = 0;
1029: my %ids_by_student;
1030: my %students_by_id;
1031:
1032: sub get_student_id {
1033: my ($sname,$sdom) = @_;
1034: my $student = $sname.':'.$sdom;
1035: if (! $have_read_student_table) {
1036: my @Result = &Apache::lonmysql::get_rows($student_table);
1037: foreach (@Result) {
1038: $ids_by_student{$_->[1]}=$_->[0];
1039: }
1040: $have_read_student_table = 1;
1041: }
1042: if (! exists($ids_by_student{$student})) {
1043: &Apache::lonmysql::store_row($student_table,[undef,$student,undef]);
1044: undef(%ids_by_student);
1045: my @Result = &Apache::lonmysql::get_rows($student_table);
1046: foreach (@Result) {
1047: $ids_by_student{$_->[1]}=$_->[0];
1048: }
1049: }
1050: return $ids_by_student{$student} if(exists( $ids_by_student{$student}));
1051: return undef; # error
1052: }
1053:
1054: sub get_student {
1055: my ($student_id) = @_;
1056: if (! exists($students_by_id{$student_id}) ||
1057: ! defined($students_by_id{$student_id}) ||
1058: $students_by_id{$student_id} eq '') {
1059: my @Result = &Apache::lonmysql::get_rows($student_table);
1060: foreach (@Result) {
1061: $students_by_id{$_->[0]}=$_->[1];
1062: }
1063: }
1064: return $students_by_id{$student_id} if(exists($students_by_id{$student_id}));
1065: return undef; # error
1066: }
1067:
1068: ################################################
1069: ################################################
1070:
1071: =pod
1072:
1073: =item &update_full_student_data($sname,$sdom,$courseid)
1074:
1075: Does a lonnet::dump on a student to populate the courses tables.
1076:
1077: Input: $sname, $sdom, $courseid
1078:
1079: Output: $returnstatus
1080:
1081: $returnstatus is a string describing any errors that occured. 'okay' is the
1082: default.
1083:
1084: This subroutine loads a students data using lonnet::dump and inserts
1085: it into the MySQL database. The inserts are done on three tables,
1086: $fulldump_response_table, $fulldump_part_table, and $fulldump_timestamp_table.
1087: The INSERT calls are made directly by this subroutine, not through lonmysql
1088: because we do a 'bulk'insert which takes advantage of MySQLs non-SQL
1089: compliant INSERT command to insert multiple rows at a time.
1090: If anything has gone wrong during this process, $returnstatus is updated with
1091: a description of the error.
1092:
1093: Once the "fulldump" tables are updated, the tables used for chart and
1094: spreadsheet (which hold only the current state of the student on their
1095: homework, not historical data) are updated. If all updates have occured
1096: successfully, the studentdata table is updated to reflect the time of the
1097: update.
1098:
1099: Notice we do not insert the data and immediately query it. This means it
1100: is possible for there to be data returned this first time that is not
1101: available the second time. CYA.
1102:
1103: =cut
1104:
1105: ################################################
1106: ################################################
1107: sub update_full_student_data {
1108: my ($sname,$sdom,$courseid) = @_;
1109: #
1110: # Set up database names
1111: &setup_table_names($courseid);
1112: #
1113: my $student_id = &get_student_id($sname,$sdom);
1114: my $student = $sname.':'.$sdom;
1115: #
1116: my $returnstatus = 'okay';
1117: #
1118: # Download students data
1119: my $time_of_retrieval = time;
1120: my @tmp = &Apache::lonnet::dump($courseid,$sdom,$sname);
1121: if (@tmp && $tmp[0] =~ /^error/) {
1122: $returnstatus = 'error retrieving full student data';
1123: return $returnstatus;
1124: } elsif (! @tmp) {
1125: $returnstatus = 'okay: no student data';
1126: return $returnstatus;
1127: }
1128: my %studentdata = @tmp;
1129: #
1130: # Get database handle and clean out the tables
1131: my $dbh = &Apache::lonmysql::get_dbh();
1132: $dbh->do('DELETE FROM '.$fulldump_response_table.' WHERE student_id='.
1133: $student_id);
1134: $dbh->do('DELETE FROM '.$fulldump_part_table.' WHERE student_id='.
1135: $student_id);
1136: $dbh->do('DELETE FROM '.$fulldump_timestamp_table.' WHERE student_id='.
1137: $student_id);
1138: #
1139: # Parse and store the data into a form we can handle
1140: my $partdata;
1141: my $respdata;
1142: while (my ($key,$value) = each(%studentdata)) {
1143: next if ($key =~ /^(\d+):(resource$|subnum$|keys:)/);
1144: my ($transaction,$symb,$parameter) = split(':',$key);
1145: my $symb_id = &get_symb_id($symb);
1146: if ($parameter eq 'timestamp') {
1147: # We can deal with 'timestamp' right away
1148: my @timestamp_storage = ($symb_id,$student_id,
1149: $transaction,$value);
1150: my $store_command = 'INSERT INTO '.$fulldump_timestamp_table.
1151: " VALUES ('".join("','",@timestamp_storage)."');";
1152: $dbh->do($store_command);
1153: if ($dbh->err()) {
1154: &Apache::lonnet::logthis('unable to execute '.$store_command);
1155: &Apache::lonnet::logthis($dbh->errstr());
1156: }
1157: next;
1158: } elsif ($parameter eq 'version') {
1159: next;
1160: } elsif ($parameter =~ /^resource\.(.*)\.(tries|
1161: award|
1162: awarded|
1163: previous|
1164: solved|
1165: awarddetail|
1166: submission|
1167: submissiongrading|
1168: molecule)\s*$/x){
1169: # we do not have enough information to store an
1170: # entire row, so we save it up until later.
1171: my ($part_and_resp_id,$field) = ($1,$2);
1172: my ($part,$part_id,$resp,$resp_id);
1173: if ($part_and_resp_id =~ /\./) {
1174: ($part,$resp) = split(/\./,$part_and_resp_id);
1175: $part_id = &get_part_id($part);
1176: $resp_id = &get_part_id($resp);
1177: } else {
1178: $part_id = &get_part_id($part_and_resp_id);
1179: }
1180: # Deal with part specific data
1181: if ($field =~ /^(tries|award|awarded|previous)$/) {
1182: $partdata->{$symb_id}->{$part_id}->{$transaction}->{$field}=$value;
1183: }
1184: # deal with response specific data
1185: if (defined($resp_id) &&
1186: $field =~ /^(tries|
1187: awarddetail|
1188: awarded|
1189: submission|
1190: submissiongrading|
1191: molecule)$/x) {
1192: if ($field eq 'submission') {
1193: # We have to be careful with user supplied input.
1194: # most of the time we are okay because it is escaped.
1195: # However, there is one wrinkle: submissions which end in
1196: # and odd number of '\' cause insert errors to occur.
1197: # Best trap this somehow...
1198: my ($offensive_string) = ($value =~ /(\\+)$/);
1199: if (length($offensive_string) % 2) {
1200: $value =~ s/\\$/\\\\/;
1201: }
1202: }
1203: if ($field eq 'submissiongrading' ||
1204: $field eq 'molecule') {
1205: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific'}=$field;
1206: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific_value'}=$value;
1207: } else {
1208: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{$field}=$value;
1209: }
1210: }
1211: }
1212: }
1213: ##
1214: ## Store the part data
1215: my $store_command = 'INSERT INTO '.$fulldump_part_table.
1216: ' VALUES '."\n";
1217: my $store_rows = 0;
1218: while (my ($symb_id,$hash1) = each (%$partdata)) {
1219: while (my ($part_id,$hash2) = each (%$hash1)) {
1220: while (my ($transaction,$data) = each (%$hash2)) {
1221: $store_command .= "('".join("','",$symb_id,$part_id,
1222: $student_id,
1223: $transaction,
1224: $data->{'tries'},
1225: $data->{'award'},
1226: $data->{'awarded'},
1227: $data->{'previous'})."'),";
1228: $store_rows++;
1229: }
1230: }
1231: }
1232: if ($store_rows) {
1233: chop($store_command);
1234: $dbh->do($store_command);
1235: if ($dbh->err) {
1236: $returnstatus = 'error storing part data';
1237: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
1238: &Apache::lonnet::logthis("While attempting\n".$store_command);
1239: }
1240: }
1241: ##
1242: ## Store the response data
1243: $store_command = 'INSERT INTO '.$fulldump_response_table.
1244: ' VALUES '."\n";
1245: $store_rows = 0;
1246: while (my ($symb_id,$hash1) = each (%$respdata)) {
1247: while (my ($part_id,$hash2) = each (%$hash1)) {
1248: while (my ($resp_id,$hash3) = each (%$hash2)) {
1249: while (my ($transaction,$data) = each (%$hash3)) {
1250: $store_command .= "('".join("','",$symb_id,$part_id,
1251: $resp_id,$student_id,
1252: $transaction,
1253: $data->{'tries'},
1254: $data->{'awarddetail'},
1255: $data->{'awarded'},
1256: $data->{'response_specific'},
1257: $data->{'response_specific_value'},
1258: $data->{'submission'})."'),";
1259: $store_rows++;
1260: }
1261: }
1262: }
1263: }
1264: if ($store_rows) {
1265: chop($store_command);
1266: $dbh->do($store_command);
1267: if ($dbh->err) {
1268: $returnstatus = 'error storing response data';
1269: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
1270: &Apache::lonnet::logthis("While attempting\n".$store_command);
1271: }
1272: }
1273: ##
1274: ## Update the students "current" data in the performance
1275: ## and parameters tables.
1276: my ($status,undef) = &store_student_data
1277: ($sname,$sdom,$courseid,
1278: &Apache::lonnet::convert_dump_to_currentdump(\%studentdata));
1279: if ($returnstatus eq 'okay' && $status ne 'okay') {
1280: $returnstatus = 'error storing current data:'.$status;
1281: } elsif ($status ne 'okay') {
1282: $returnstatus .= ' error storing current data:'.$status;
1283: }
1284: ##
1285: ## Update the students time......
1286: if ($returnstatus eq 'okay') {
1287: &Apache::lonmysql::replace_row
1288: ($studentdata_table,
1289: [$student_id,$time_of_retrieval,$time_of_retrieval,undef,undef]);
1290: }
1291: return $returnstatus;
1292: }
1293:
1294: ################################################
1295: ################################################
1296:
1297: =pod
1298:
1299: =item &update_student_data()
1300:
1301: Input: $sname, $sdom, $courseid
1302:
1303: Output: $returnstatus, \%student_data
1304:
1305: $returnstatus is a string describing any errors that occured. 'okay' is the
1306: default.
1307: \%student_data is the data returned by a call to lonnet::currentdump.
1308:
1309: This subroutine loads a students data using lonnet::currentdump and inserts
1310: it into the MySQL database. The inserts are done on two tables,
1311: $performance_table and $parameters_table. $parameters_table holds the data
1312: that is not included in $performance_table. See the description of
1313: $performance_table elsewhere in this file. The INSERT calls are made
1314: directly by this subroutine, not through lonmysql because we do a 'bulk'
1315: insert which takes advantage of MySQLs non-SQL compliant INSERT command to
1316: insert multiple rows at a time. If anything has gone wrong during this
1317: process, $returnstatus is updated with a description of the error and
1318: \%student_data is returned.
1319:
1320: Notice we do not insert the data and immediately query it. This means it
1321: is possible for there to be data returned this first time that is not
1322: available the second time. CYA.
1323:
1324: =cut
1325:
1326: ################################################
1327: ################################################
1328: sub update_student_data {
1329: my ($sname,$sdom,$courseid) = @_;
1330: #
1331: # Set up database names
1332: &setup_table_names($courseid);
1333: #
1334: my $student_id = &get_student_id($sname,$sdom);
1335: my $student = $sname.':'.$sdom;
1336: #
1337: my $returnstatus = 'okay';
1338: #
1339: # Download students data
1340: my $time_of_retrieval = time;
1341: my @tmp = &Apache::lonnet::currentdump($courseid,$sdom,$sname);
1342: if ((scalar(@tmp) > 0) && ($tmp[0] =~ /^error:/)) {
1343: &Apache::lonnet::logthis('error getting data for '.
1344: $sname.':'.$sdom.' in course '.$courseid.
1345: ':'.$tmp[0]);
1346: $returnstatus = 'error getting data';
1347: return ($returnstatus,undef);
1348: }
1349: if (scalar(@tmp) < 1) {
1350: return ('no data',undef);
1351: }
1352: my %student_data = @tmp;
1353: my @Results = &store_student_data($sname,$sdom,$courseid,\%student_data);
1354: #
1355: # Set the students update time
1356: &Apache::lonmysql::replace_row($studentdata_table,
1357: [$student_id,$time_of_retrieval,undef,undef,undef]);
1358: #
1359: return @Results;
1360: }
1361:
1362: sub store_student_data {
1363: my ($sname,$sdom,$courseid,$student_data) = @_;
1364: #
1365: my $student_id = &get_student_id($sname,$sdom);
1366: my $student = $sname.':'.$sdom;
1367: #
1368: my $returnstatus = 'okay';
1369: #
1370: # Remove all of the students data from the table
1371: my $dbh = &Apache::lonmysql::get_dbh();
1372: $dbh->do('DELETE FROM '.$performance_table.' WHERE student_id='.
1373: $student_id);
1374: $dbh->do('DELETE FROM '.$parameters_table.' WHERE student_id='.
1375: $student_id);
1376: #
1377: # Store away the data
1378: #
1379: my $starttime = Time::HiRes::time;
1380: my $elapsed = 0;
1381: my $rows_stored;
1382: my $store_parameters_command = 'INSERT INTO '.$parameters_table.
1383: ' VALUES '."\n";
1384: my $num_parameters = 0;
1385: my $store_performance_command = 'INSERT INTO '.$performance_table.
1386: ' VALUES '."\n";
1387: return ('error',undef) if (! defined($dbh));
1388: while (my ($current_symb,$param_hash) = each(%{$student_data})) {
1389: #
1390: # make sure the symb is set up properly
1391: my $symb_id = &get_symb_id($current_symb);
1392: #
1393: # Load data into the tables
1394: while (my ($parameter,$value) = each(%$param_hash)) {
1395: my $newstring;
1396: if ($parameter !~ /(timestamp|resource\.(.*)\.(solved|tries|awarded|award|awarddetail|previous))/) {
1397: $newstring = "('".join("','",
1398: $symb_id,$student_id,
1399: $parameter)."',".
1400: $dbh->quote($value)."),\n";
1401: $num_parameters ++;
1402: if ($newstring !~ /''/) {
1403: $store_parameters_command .= $newstring;
1404: $rows_stored++;
1405: }
1406: }
1407: next if ($parameter !~ /^resource\.(.*)\.solved$/);
1408: #
1409: my $part = $1;
1410: my $part_id = &get_part_id($part);
1411: next if (!defined($part_id));
1412: my $solved = $value;
1413: my $tries = $param_hash->{'resource.'.$part.'.tries'};
1414: my $awarded = $param_hash->{'resource.'.$part.'.awarded'};
1415: my $award = $param_hash->{'resource.'.$part.'.award'};
1416: my $awarddetail = $param_hash->{'resource.'.$part.'.awarddetail'};
1417: my $timestamp = $param_hash->{'timestamp'};
1418: #
1419: $solved = '' if (! defined($solved));
1420: $tries = '' if (! defined($tries));
1421: $awarded = '' if (! defined($awarded));
1422: $award = '' if (! defined($award));
1423: $awarddetail = '' if (! defined($awarddetail));
1424: $newstring = "('".join("','",$symb_id,$student_id,$part_id,$part,
1425: $solved,$tries,$awarded,$award,
1426: $awarddetail,$timestamp)."'),\n";
1427: $store_performance_command .= $newstring;
1428: $rows_stored++;
1429: }
1430: }
1431: chop $store_parameters_command;
1432: chop $store_parameters_command;
1433: chop $store_performance_command;
1434: chop $store_performance_command;
1435: my $start = Time::HiRes::time;
1436: $dbh->do($store_parameters_command) if ($num_parameters>0);
1437: if ($dbh->err()) {
1438: &Apache::lonnet::logthis(' bigass insert error:'.$dbh->errstr());
1439: &Apache::lonnet::logthis('command = '.$store_parameters_command);
1440: &Apache::lonnet::logthis('rows_stored = '.$rows_stored);
1441: &Apache::lonnet::logthis('student_id = '.$student_id);
1442: $returnstatus = 'error: unable to insert parameters into database';
1443: return ($returnstatus,$student_data);
1444: }
1445: $dbh->do($store_performance_command);
1446: if ($dbh->err()) {
1447: &Apache::lonnet::logthis(' bigass insert error:'.$dbh->errstr());
1448: &Apache::lonnet::logthis('command = '.$store_performance_command);
1449: $returnstatus = 'error: unable to insert performance into database';
1450: return ($returnstatus,$student_data);
1451: }
1452: $elapsed += Time::HiRes::time - $start;
1453: return ($returnstatus,$student_data);
1454: }
1455:
1456: ######################################
1457: ######################################
1458:
1459: =pod
1460:
1461: =item &ensure_tables_are_set_up($courseid)
1462:
1463: Checks to be sure the MySQL tables for the given class are set up.
1464: If $courseid is omitted it will be obtained from the environment.
1465:
1466: Returns nothing on success and 'error' on failure
1467:
1468: =cut
1469:
1470: ######################################
1471: ######################################
1472: sub ensure_tables_are_set_up {
1473: my ($courseid) = @_;
1474: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1475: #
1476: # Clean out package variables
1477: &setup_table_names($courseid);
1478: #
1479: # if the tables do not exist, make them
1480: my @CurrentTable = &Apache::lonmysql::tables_in_db();
1481: my ($found_symb,$found_student,$found_part,$found_studentdata,
1482: $found_performance,$found_parameters,$found_fulldump_part,
1483: $found_fulldump_response,$found_fulldump_timestamp);
1484: foreach (@CurrentTable) {
1485: $found_symb = 1 if ($_ eq $symb_table);
1486: $found_student = 1 if ($_ eq $student_table);
1487: $found_part = 1 if ($_ eq $part_table);
1488: $found_studentdata = 1 if ($_ eq $studentdata_table);
1489: $found_performance = 1 if ($_ eq $performance_table);
1490: $found_parameters = 1 if ($_ eq $parameters_table);
1491: $found_fulldump_part = 1 if ($_ eq $fulldump_part_table);
1492: $found_fulldump_response = 1 if ($_ eq $fulldump_response_table);
1493: $found_fulldump_timestamp = 1 if ($_ eq $fulldump_timestamp_table);
1494: }
1495: if (!$found_symb || !$found_studentdata ||
1496: !$found_student || !$found_part ||
1497: !$found_performance || !$found_parameters ||
1498: !$found_fulldump_part || !$found_fulldump_response ||
1499: !$found_fulldump_timestamp ) {
1500: if (&init_dbs($courseid)) {
1501: return 'error';
1502: }
1503: }
1504: }
1505:
1506: ################################################
1507: ################################################
1508:
1509: =pod
1510:
1511: =item &ensure_current_data()
1512:
1513: Input: $sname, $sdom, $courseid
1514:
1515: Output: $status, $data
1516:
1517: This routine ensures the data for a given student is up to date.
1518: The $studentdata_table is queried to determine the time of the last update.
1519: If the students data is out of date, &update_student_data() is called.
1520: The return values from the call to &update_student_data() are returned.
1521:
1522: =cut
1523:
1524: ################################################
1525: ################################################
1526: sub ensure_current_data {
1527: my ($sname,$sdom,$courseid) = @_;
1528: my $status = 'okay'; # return value
1529: #
1530: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1531: &ensure_tables_are_set_up($courseid);
1532: #
1533: # Get the update time for the user
1534: my $updatetime = 0;
1535: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1536: ($sdom,$sname,$courseid.'.db',
1537: $Apache::lonnet::perlvar{'lonUsersDir'});
1538: #
1539: my $student_id = &get_student_id($sname,$sdom);
1540: my @Result = &Apache::lonmysql::get_rows($studentdata_table,
1541: "student_id ='$student_id'");
1542: my $data = undef;
1543: if (@Result) {
1544: $updatetime = $Result[0]->[1];
1545: }
1546: if ($modifiedtime > $updatetime) {
1547: ($status,$data) = &update_student_data($sname,$sdom,$courseid);
1548: }
1549: return ($status,$data);
1550: }
1551:
1552: ################################################
1553: ################################################
1554:
1555: =pod
1556:
1557: =item &ensure_current_full_data($sname,$sdom,$courseid)
1558:
1559: Input: $sname, $sdom, $courseid
1560:
1561: Output: $status
1562:
1563: This routine ensures the fulldata (the data from a lonnet::dump, not a
1564: lonnet::currentdump) for a given student is up to date.
1565: The $studentdata_table is queried to determine the time of the last update.
1566: If the students fulldata is out of date, &update_full_student_data() is
1567: called.
1568:
1569: The return value from the call to &update_full_student_data() is returned.
1570:
1571: =cut
1572:
1573: ################################################
1574: ################################################
1575: sub ensure_current_full_data {
1576: my ($sname,$sdom,$courseid) = @_;
1577: my $status = 'okay'; # return value
1578: #
1579: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1580: &ensure_tables_are_set_up($courseid);
1581: #
1582: # Get the update time for the user
1583: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1584: ($sdom,$sname,$courseid.'.db',
1585: $Apache::lonnet::perlvar{'lonUsersDir'});
1586: #
1587: my $student_id = &get_student_id($sname,$sdom);
1588: my @Result = &Apache::lonmysql::get_rows($studentdata_table,
1589: "student_id ='$student_id'");
1590: my $updatetime;
1591: if (@Result && ref($Result[0]) eq 'ARRAY') {
1592: $updatetime = $Result[0]->[2];
1593: }
1594: if (! defined($updatetime) || $modifiedtime > $updatetime) {
1595: $status = &update_full_student_data($sname,$sdom,$courseid);
1596: }
1597: return $status;
1598: }
1599:
1600: ################################################
1601: ################################################
1602:
1603: =pod
1604:
1605: =item &get_student_data_from_performance_cache()
1606:
1607: Input: $sname, $sdom, $symb, $courseid
1608:
1609: Output: hash reference containing the data for the given student.
1610: If $symb is undef, all the students data is returned.
1611:
1612: This routine is the heart of the local caching system. See the description
1613: of $performance_table, $symb_table, $student_table, and $part_table. The
1614: main task is building the MySQL request. The tables appear in the request
1615: in the order in which they should be parsed by MySQL. When searching
1616: on a student the $student_table is used to locate the 'student_id'. All
1617: rows in $performance_table which have a matching 'student_id' are returned,
1618: with data from $part_table and $symb_table which match the entries in
1619: $performance_table, 'part_id' and 'symb_id'. When searching on a symb,
1620: the $symb_table is processed first, with matching rows grabbed from
1621: $performance_table and filled in from $part_table and $student_table in
1622: that order.
1623:
1624: Running 'EXPLAIN ' on the 'SELECT' statements generated can be quite
1625: interesting, especially if you play with the order the tables are listed.
1626:
1627: =cut
1628:
1629: ################################################
1630: ################################################
1631: sub get_student_data_from_performance_cache {
1632: my ($sname,$sdom,$symb,$courseid)=@_;
1633: my $student = $sname.':'.$sdom if (defined($sname) && defined($sdom));
1634: &setup_table_names($courseid);
1635: #
1636: # Return hash
1637: my $studentdata;
1638: #
1639: my $dbh = &Apache::lonmysql::get_dbh();
1640: my $request = "SELECT ".
1641: "d.symb,a.part,a.solved,a.tries,a.awarded,a.award,a.awarddetail,".
1642: "a.timestamp ";
1643: if (defined($student)) {
1644: $request .= "FROM $student_table AS b ".
1645: "LEFT JOIN $performance_table AS a ON b.student_id=a.student_id ".
1646: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1647: "LEFT JOIN $symb_table AS d ON d.symb_id = a.symb_id ".
1648: "WHERE student='$student'";
1649: if (defined($symb) && $symb ne '') {
1650: $request .= " AND d.symb=".$dbh->quote($symb);
1651: }
1652: } elsif (defined($symb) && $symb ne '') {
1653: $request .= "FROM $symb_table as d ".
1654: "LEFT JOIN $performance_table AS a ON d.symb_id=a.symb_id ".
1655: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1656: "LEFT JOIN $student_table AS b ON b.student_id = a.student_id ".
1657: "WHERE symb='".$dbh->quote($symb)."'";
1658: }
1659: my $starttime = Time::HiRes::time;
1660: my $rows_retrieved = 0;
1661: my $sth = $dbh->prepare($request);
1662: $sth->execute();
1663: if ($sth->err()) {
1664: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1665: &Apache::lonnet::logthis("\n".$request."\n");
1666: &Apache::lonnet::logthis("error is:".$sth->errstr());
1667: return undef;
1668: }
1669: foreach my $row (@{$sth->fetchall_arrayref}) {
1670: $rows_retrieved++;
1671: my ($symb,$part,$solved,$tries,$awarded,$award,$awarddetail,$time) =
1672: (@$row);
1673: my $base = 'resource.'.$part;
1674: $studentdata->{$symb}->{$base.'.solved'} = $solved;
1675: $studentdata->{$symb}->{$base.'.tries'} = $tries;
1676: $studentdata->{$symb}->{$base.'.awarded'} = $awarded;
1677: $studentdata->{$symb}->{$base.'.award'} = $award;
1678: $studentdata->{$symb}->{$base.'.awarddetail'} = $awarddetail;
1679: $studentdata->{$symb}->{'timestamp'} = $time if (defined($time) && $time ne '');
1680: }
1681: if (defined($symb) && $symb ne '') {
1682: $studentdata = $studentdata->{$symb};
1683: }
1684: return $studentdata;
1685: }
1686:
1687: ################################################
1688: ################################################
1689:
1690: =pod
1691:
1692: =item &get_current_state()
1693:
1694: Input: $sname,$sdom,$symb,$courseid
1695:
1696: Output: Described below
1697:
1698: Retrieve the current status of a students performance. $sname and
1699: $sdom are the only required parameters. If $symb is undef the results
1700: of an &Apache::lonnet::currentdump() will be returned.
1701: If $courseid is undef it will be retrieved from the environment.
1702:
1703: The return structure is based on &Apache::lonnet::currentdump. If
1704: $symb is unspecified, all the students data is returned in a hash of
1705: the form:
1706: (
1707: symb1 => { param1 => value1, param2 => value2 ... },
1708: symb2 => { param1 => value1, param2 => value2 ... },
1709: )
1710:
1711: If $symb is specified, a hash of
1712: (
1713: param1 => value1,
1714: param2 => value2,
1715: )
1716: is returned.
1717:
1718: If no data is found for $symb, or if the student has no performance data,
1719: an empty list is returned.
1720:
1721: =cut
1722:
1723: ################################################
1724: ################################################
1725: sub get_current_state {
1726: my ($sname,$sdom,$symb,$courseid,$forcedownload)=@_;
1727: #
1728: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1729: #
1730: return () if (! defined($sname) || ! defined($sdom));
1731: #
1732: my ($status,$data) = &ensure_current_data($sname,$sdom,$courseid);
1733: # &Apache::lonnet::logthis
1734: # ('sname = '.$sname.
1735: # ' domain = '.$sdom.
1736: # ' status = '.$status.
1737: # ' data is '.(defined($data)?'defined':'undefined'));
1738: # while (my ($symb,$hash) = each(%$data)) {
1739: # &Apache::lonnet::logthis($symb."\n----------------------------------");
1740: # while (my ($key,$value) = each (%$hash)) {
1741: # &Apache::lonnet::logthis(" ".$key." = ".$value);
1742: # }
1743: # }
1744: #
1745: if (defined($data) && defined($symb) && ref($data->{$symb})) {
1746: return %{$data->{$symb}};
1747: } elsif (defined($data) && ! defined($symb) && ref($data)) {
1748: return %$data;
1749: }
1750: if ($status eq 'no data') {
1751: return ();
1752: } else {
1753: if ($status ne 'okay' && $status ne '') {
1754: &Apache::lonnet::logthis('status = '.$status);
1755: return ();
1756: }
1757: my $returnhash = &get_student_data_from_performance_cache($sname,$sdom,
1758: $symb,$courseid);
1759: return %$returnhash if (defined($returnhash));
1760: }
1761: return ();
1762: }
1763:
1764: ################################################
1765: ################################################
1766:
1767: =pod
1768:
1769: =item &get_problem_statistics()
1770:
1771: Gather data on a given problem. The database is assumed to be
1772: populated and all local caching variables are assumed to be set
1773: properly. This means you need to call &ensure_current_data for
1774: the students you are concerned with prior to calling this routine.
1775:
1776: Inputs: $students, $symb, $part, $courseid
1777:
1778: =over 4
1779:
1780: =item $students is an array of hash references.
1781: Each hash must contain at least the 'username' and 'domain' of a student.
1782:
1783: =item $symb is the symb for the problem.
1784:
1785: =item $part is the part id you need statistics for
1786:
1787: =item $courseid is the course id, of course!
1788:
1789: =back
1790:
1791: Outputs: See the code for up to date information. A hash reference is
1792: returned. The hash has the following keys defined:
1793:
1794: =over 4
1795:
1796: =item num_students The number of students attempting the problem
1797:
1798: =item tries The total number of tries for the students
1799:
1800: =item max_tries The maximum number of tries taken
1801:
1802: =item mean_tries The average number of tries
1803:
1804: =item num_solved The number of students able to solve the problem
1805:
1806: =item num_override The number of students whose answer is 'correct_by_override'
1807:
1808: =item deg_of_diff The degree of difficulty of the problem
1809:
1810: =item std_tries The standard deviation of the number of tries
1811:
1812: =item skew_tries The skew of the number of tries
1813:
1814: =item per_wrong The number of students attempting the problem who were not
1815: able to answer it correctly.
1816:
1817: =back
1818:
1819: =cut
1820:
1821: ################################################
1822: ################################################
1823: sub get_problem_statistics {
1824: my ($students,$symb,$part,$courseid) = @_;
1825: return if (! defined($symb) || ! defined($part));
1826: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1827: #
1828: my $symb_id = &get_symb_id($symb);
1829: my $part_id = &get_part_id($part);
1830: my $stats_table = $courseid.'_problem_stats';
1831: #
1832: my $dbh = &Apache::lonmysql::get_dbh();
1833: return undef if (! defined($dbh));
1834: #
1835: # A) Number of Students attempting problem
1836: # B) Total number of tries of students attempting problem
1837: # C) Mod (largest number of tries for solving the problem)
1838: # D) Mean (average number of tries for solving the problem)
1839: # E) Number of students to solve the problem
1840: # F) Number of students to solve the problem by override
1841: # G) Number of students unable to solve the problem
1842: # H) Degree of difficulty : 1-(E+F)/B
1843: # I) Standard deviation of number of tries
1844: # J) Skew of tries: sqrt(sum(Xi-D)^3)/A
1845: #
1846: $dbh->do('DROP TABLE '.$stats_table); # May return an error
1847: my $request =
1848: 'CREATE TEMPORARY TABLE '.$stats_table.
1849: ' SELECT student_id,solved,award,tries FROM '.$performance_table.
1850: ' WHERE symb_id='.$symb_id.' AND part_id='.$part_id;
1851: if (defined($students)) {
1852: $request .= ' AND ('.
1853: join(' OR ', map {'student_id='.
1854: &get_student_id($_->{'username'},
1855: $_->{'domain'})
1856: } @$students
1857: ).')';
1858: }
1859: # &Apache::lonnet::logthis($request);
1860: $dbh->do($request);
1861: my ($num,$tries,$mod,$mean,$STD) = &execute_SQL_request
1862: ($dbh,
1863: 'SELECT COUNT(*),SUM(tries),MAX(tries),AVG(tries),STD(tries) FROM '.
1864: $stats_table);
1865: my ($Solved) = &execute_SQL_request($dbh,'SELECT COUNT(tries) FROM '.
1866: $stats_table.
1867: " WHERE solved='correct_by_student'");
1868: my ($solved) = &execute_SQL_request($dbh,'SELECT COUNT(tries) FROM '.
1869: $stats_table.
1870: " WHERE solved='correct_by_override'");
1871: $num = 0 if (! defined($num));
1872: $tries = 0 if (! defined($tries));
1873: $mod = 0 if (! defined($mod));
1874: $STD = 0 if (! defined($STD));
1875: $Solved = 0 if (! defined($Solved));
1876: $solved = 0 if (! defined($solved));
1877: #
1878: my $DegOfDiff = 'nan';
1879: $DegOfDiff = 1-($Solved)/$tries if ($tries>0);
1880:
1881: my $SKEW = 'nan';
1882: my $wrongpercent = 0;
1883: if ($num > 0) {
1884: ($SKEW) = &execute_SQL_request($dbh,'SELECT SQRT(SUM('.
1885: 'POWER(tries - '.$STD.',3)'.
1886: '))/'.$num.' FROM '.$stats_table);
1887: $wrongpercent=int(10*100*($num-$Solved+$solved)/$num)/10;
1888: }
1889: #
1890: $dbh->do('DROP TABLE '.$stats_table); # May return an error
1891: #
1892: # Store in metadata
1893: #
1894: if ($num) {
1895: my %storestats=();
1896:
1897: my $urlres=(&Apache::lonnet::decode_symb($symb))[2];
1898:
1899: $storestats{$courseid.'___'.$urlres.'___timestamp'}=time;
1900: $storestats{$courseid.'___'.$urlres.'___stdno'}=$num;
1901: $storestats{$courseid.'___'.$urlres.'___avetries'}=$mean;
1902: $storestats{$courseid.'___'.$urlres.'___difficulty'}=$DegOfDiff;
1903:
1904: $urlres=~/^(\w+)\/(\w+)/;
1905: &Apache::lonnet::put('nohist_resevaldata',\%storestats,$1,$2);
1906: }
1907: #
1908: # Return result
1909: #
1910: return { num_students => $num,
1911: tries => $tries,
1912: max_tries => $mod,
1913: mean_tries => $mean,
1914: std_tries => $STD,
1915: skew_tries => $SKEW,
1916: num_solved => $Solved,
1917: num_override => $solved,
1918: per_wrong => $wrongpercent,
1919: deg_of_diff => $DegOfDiff };
1920: }
1921:
1922: sub execute_SQL_request {
1923: my ($dbh,$request)=@_;
1924: # &Apache::lonnet::logthis($request);
1925: my $sth = $dbh->prepare($request);
1926: $sth->execute();
1927: my $row = $sth->fetchrow_arrayref();
1928: if (ref($row) eq 'ARRAY' && scalar(@$row)>0) {
1929: return @$row;
1930: }
1931: return ();
1932: }
1933:
1934:
1935: ################################################
1936: ################################################
1937:
1938: =pod
1939:
1940: =item &setup_table_names()
1941:
1942: input: course id
1943:
1944: output: none
1945:
1946: Cleans up the package variables for local caching.
1947:
1948: =cut
1949:
1950: ################################################
1951: ################################################
1952: sub setup_table_names {
1953: my ($courseid) = @_;
1954: if (! defined($courseid)) {
1955: $courseid = $ENV{'request.course.id'};
1956: }
1957: #
1958: if (! defined($current_course) || $current_course ne $courseid) {
1959: # Clear out variables
1960: $have_read_part_table = 0;
1961: undef(%ids_by_part);
1962: undef(%parts_by_id);
1963: $have_read_symb_table = 0;
1964: undef(%ids_by_symb);
1965: undef(%symbs_by_id);
1966: $have_read_student_table = 0;
1967: undef(%ids_by_student);
1968: undef(%students_by_id);
1969: #
1970: $current_course = $courseid;
1971: }
1972: #
1973: # Set up database names
1974: my $base_id = $courseid;
1975: $symb_table = $base_id.'_'.'symb';
1976: $part_table = $base_id.'_'.'part';
1977: $student_table = $base_id.'_'.'student';
1978: $studentdata_table = $base_id.'_'.'studentdata';
1979: $performance_table = $base_id.'_'.'performance';
1980: $parameters_table = $base_id.'_'.'parameters';
1981: $fulldump_part_table = $base_id.'_'.'partdata';
1982: $fulldump_response_table = $base_id.'_'.'responsedata';
1983: $fulldump_timestamp_table = $base_id.'_'.'timestampdata';
1984: #
1985: @Tables = (
1986: $symb_table,
1987: $part_table,
1988: $student_table,
1989: $studentdata_table,
1990: $performance_table,
1991: $parameters_table,
1992: $fulldump_part_table,
1993: $fulldump_response_table,
1994: $fulldump_timestamp_table,
1995: );
1996: return;
1997: }
1998:
1999: ################################################
2000: ################################################
2001:
2002: =pod
2003:
2004: =back
2005:
2006: =item End of Local Data Caching Subroutines
2007:
2008: =cut
2009:
2010: ################################################
2011: ################################################
2012:
2013: } # End scope of table identifiers
2014:
2015: ################################################
2016: ################################################
2017:
2018: =pod
2019:
2020: =head3 Classlist Subroutines
2021:
2022: =item &get_classlist();
2023:
2024: Retrieve the classist of a given class or of the current class. Student
2025: information is returned from the classlist.db file and, if needed,
2026: from the students environment.
2027:
2028: Optional arguments are $cid, $cdom, and $cnum (course id, course domain,
2029: and course number, respectively). Any omitted arguments will be taken
2030: from the current environment ($ENV{'request.course.id'},
2031: $ENV{'course.'.$cid.'.domain'}, and $ENV{'course.'.$cid.'.num'}).
2032:
2033: Returns a reference to a hash which contains:
2034: keys '$sname:$sdom'
2035: values [$sdom,$sname,$end,$start,$id,$section,$fullname,$status]
2036:
2037: The constant values CL_SDOM, CL_SNAME, CL_END, etc. can be used
2038: as indices into the returned list to future-proof clients against
2039: changes in the list order.
2040:
2041: =cut
2042:
2043: ################################################
2044: ################################################
2045:
2046: sub CL_SDOM { return 0; }
2047: sub CL_SNAME { return 1; }
2048: sub CL_END { return 2; }
2049: sub CL_START { return 3; }
2050: sub CL_ID { return 4; }
2051: sub CL_SECTION { return 5; }
2052: sub CL_FULLNAME { return 6; }
2053: sub CL_STATUS { return 7; }
2054:
2055: sub get_classlist {
2056: my ($cid,$cdom,$cnum) = @_;
2057: $cid = $cid || $ENV{'request.course.id'};
2058: $cdom = $cdom || $ENV{'course.'.$cid.'.domain'};
2059: $cnum = $cnum || $ENV{'course.'.$cid.'.num'};
2060: my $now = time;
2061: #
2062: my %classlist=&Apache::lonnet::dump('classlist',$cdom,$cnum);
2063: while (my ($student,$info) = each(%classlist)) {
2064: if ($student =~ /^(con_lost|error|no_such_host)/i) {
2065: &Apache::lonnet::logthis('get_classlist error for '.$cid.':'.$student);
2066: return undef;
2067: }
2068: my ($sname,$sdom) = split(/:/,$student);
2069: my @Values = split(/:/,$info);
2070: my ($end,$start,$id,$section,$fullname);
2071: if (@Values > 2) {
2072: ($end,$start,$id,$section,$fullname) = @Values;
2073: } else { # We have to get the data ourselves
2074: ($end,$start) = @Values;
2075: $section = &Apache::lonnet::getsection($sdom,$sname,$cid);
2076: my %info=&Apache::lonnet::get('environment',
2077: ['firstname','middlename',
2078: 'lastname','generation','id'],
2079: $sdom, $sname);
2080: my ($tmp) = keys(%info);
2081: if ($tmp =~/^(con_lost|error|no_such_host)/i) {
2082: $fullname = 'not available';
2083: $id = 'not available';
2084: &Apache::lonnet::logthis('unable to retrieve environment '.
2085: 'for '.$sname.':'.$sdom);
2086: } else {
2087: $fullname = &ProcessFullName(@info{qw/lastname generation
2088: firstname middlename/});
2089: $id = $info{'id'};
2090: }
2091: # Update the classlist with this students information
2092: if ($fullname ne 'not available') {
2093: my $enrolldata = join(':',$end,$start,$id,$section,$fullname);
2094: my $reply=&Apache::lonnet::cput('classlist',
2095: {$student => $enrolldata},
2096: $cdom,$cnum);
2097: if ($reply !~ /^(ok|delayed)/) {
2098: &Apache::lonnet::logthis('Unable to update classlist for '.
2099: 'student '.$sname.':'.$sdom.
2100: ' error:'.$reply);
2101: }
2102: }
2103: }
2104: my $status='Expired';
2105: if(((!$end) || $now < $end) && ((!$start) || ($now > $start))) {
2106: $status='Active';
2107: }
2108: $classlist{$student} =
2109: [$sdom,$sname,$end,$start,$id,$section,$fullname,$status];
2110: }
2111: if (wantarray()) {
2112: return (\%classlist,['domain','username','end','start','id',
2113: 'section','fullname','status']);
2114: } else {
2115: return \%classlist;
2116: }
2117: }
2118:
2119: # ----- END HELPER FUNCTIONS --------------------------------------------
2120:
2121: 1;
2122: __END__
2123:
2124:
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