File:
[LON-CAPA] /
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loncoursedata.pm
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1.140:
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Thu Oct 7 22:12:47 2004 UTC (19 years, 8 months ago) by
albertel
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MAIN
CVS tags:
HEAD
- fixes bug#3350 hopefully for good.
- $navmaps objects never actaully got cleaned up due the resource objects in it holding a reference back to the navmap object, this meant the hashes didn't get untied and that we leaked memory
- needs WeakRef
1: # The LearningOnline Network with CAPA
2: #
3: # $Id: loncoursedata.pm,v 1.140 2004/10/07 22:12:47 albertel 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: Use lonnavmaps to build a data structure describing the order and
77: assessment contents of each sequence in the current course.
78:
79: The returned structure is a hash reference.
80:
81: { title => 'title',
82: symb => 'symb',
83: src => '/s/o/u/r/c/e',
84: type => (container|assessment),
85: num_assess => 2, # only for container
86: parts => [11,13,15], # only for assessment
87: response_ids => [12,14,16], # only for assessment
88: contents => [........] # only for container
89: }
90:
91: $hash->{'contents'} is a reference to an array of hashes of the same structure.
92:
93: Also returned are array references to the sequences and assessments contained
94: in the course.
95:
96:
97: =cut
98:
99: ####################################################
100: ####################################################
101: sub get_sequence_assessment_data {
102: my $fn=$ENV{'request.course.fn'};
103: ##
104: ## use navmaps
105: my $navmap = Apache::lonnavmaps::navmap->new();
106: if (!defined($navmap)) {
107: return 'Can not open Coursemap';
108: }
109: # We explicity grab the top level map because I am not sure we
110: # are pulling it from the iterator.
111: my $top_level_map = $navmap->getById('0.0');
112: #
113: my $iterator = $navmap->getIterator(undef, undef, undef, 1);
114: my $curRes = $iterator->next(); # Top level sequence
115: ##
116: ## Prime the pump
117: ##
118: ## We are going to loop until we run out of sequences/pages to explore for
119: ## resources. This means we have to start out with something to look
120: ## at.
121: my $title = $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
122: my $symb = $top_level_map->symb();
123: my $src = $top_level_map->src();
124: my $randompick = $top_level_map->randompick();
125: #
126: my @Sequences;
127: my @Assessments;
128: my @Nested_Sequences = (); # Stack of sequences, keeps track of depth
129: my $top = { title => $title,
130: src => $src,
131: symb => $symb,
132: type => 'container',
133: num_assess => 0,
134: num_assess_parts => 0,
135: contents => [],
136: randompick => $randompick,
137: };
138: push (@Sequences,$top);
139: push (@Nested_Sequences, $top);
140: #
141: # We need to keep track of which sequences contain homework problems
142: #
143: my $previous_too;
144: my $previous;
145: while (scalar(@Nested_Sequences)) {
146: $previous_too = $previous;
147: $previous = $curRes;
148: $curRes = $iterator->next();
149: my $currentmap = $Nested_Sequences[-1]; # Last one on the stack
150: if ($curRes == $iterator->BEGIN_MAP()) {
151: if (! ref($previous)) {
152: $previous = $previous_too;
153: }
154: if (! ref($previous)) {
155: next;
156: }
157: # get the map itself, instead of BEGIN_MAP
158: $title = $previous->compTitle;
159: $symb = $previous->symb();
160: $src = $previous->src();
161: $randompick = $previous->randompick();
162: my $newmap = { title => $title,
163: src => $src,
164: symb => $symb,
165: type => 'container',
166: num_assess => 0,
167: randompick => $randompick,
168: contents => [],
169: };
170: push (@{$currentmap->{'contents'}},$newmap); # this is permanent
171: push (@Sequences,$newmap);
172: push (@Nested_Sequences, $newmap); # this is a stack
173: next;
174: }
175: if ($curRes == $iterator->END_MAP()) {
176: pop(@Nested_Sequences);
177: next;
178: }
179: next if (! ref($curRes));
180: next if (! $curRes->is_problem() && $curRes->src() !~ /\.survey$/);
181: # Okay, from here on out we only deal with assessments
182: $title = $curRes->compTitle();
183: $symb = $curRes->symb();
184: $src = $curRes->src();
185: my $parts = $curRes->parts();
186: my %partdata;
187: foreach my $part (@$parts) {
188: my @Responses = $curRes->responseType($part);
189: my @Ids = $curRes->responseIds($part);
190: $partdata{$part}->{'ResponseTypes'}= \@Responses;
191: $partdata{$part}->{'ResponseIds'} = \@Ids;
192: $partdata{$part}->{'Survey'} = $curRes->is_survey($part);
193: # Count how many responses of each type there are in this part
194: foreach (@Responses) {
195: $partdata{$part}->{$_}++;
196: }
197: }
198: my $assessment = { title => $title,
199: src => $src,
200: symb => $symb,
201: type => 'assessment',
202: parts => $parts,
203: num_parts => scalar(@$parts),
204: partdata => \%partdata,
205: };
206: push(@Assessments,$assessment);
207: push(@{$currentmap->{'contents'}},$assessment);
208: $currentmap->{'num_assess'}++;
209: $currentmap->{'num_assess_parts'}+= scalar(@$parts);
210: }
211: return ($top,\@Sequences,\@Assessments);
212: }
213:
214: sub LoadDiscussion {
215: my ($courseID)=@_;
216: my %Discuss=();
217: my %contrib=&Apache::lonnet::dump(
218: $courseID,
219: $ENV{'course.'.$courseID.'.domain'},
220: $ENV{'course.'.$courseID.'.num'});
221:
222: #my %contrib=&DownloadCourseInformation($name, $courseID, 0);
223:
224: foreach my $temp(keys %contrib) {
225: if ($temp=~/^version/) {
226: my $ver=$contrib{$temp};
227: my ($dummy,$prb)=split(':',$temp);
228: for (my $idx=1; $idx<=$ver; $idx++ ) {
229: my $name=$contrib{"$idx:$prb:sendername"};
230: $Discuss{"$name:$prb"}=$idx;
231: }
232: }
233: }
234:
235: return \%Discuss;
236: }
237:
238: ################################################
239: ################################################
240:
241: =pod
242:
243: =item &GetUserName(username,userdomain)
244:
245: Returns a hash with the following entries:
246: 'firstname', 'middlename', 'lastname', 'generation', and 'fullname'
247:
248: 'fullname' is the result of &Apache::loncoursedata::ProcessFullName.
249:
250: =cut
251:
252: ################################################
253: ################################################
254: sub GetUserName {
255: my ($username,$userdomain) = @_;
256: $username = $ENV{'user.name'} if (! defined($username));
257: $userdomain = $ENV{'user.domain'} if (! defined($username));
258: my %userenv = &Apache::lonnet::get('environment',
259: ['firstname','middlename','lastname','generation'],
260: $userdomain,$username);
261: $userenv{'fullname'} = &ProcessFullName($userenv{'lastname'},
262: $userenv{'generation'},
263: $userenv{'firstname'},
264: $userenv{'middlename'});
265: return %userenv;
266: }
267:
268: ################################################
269: ################################################
270:
271: =pod
272:
273: =item &ProcessFullName()
274:
275: Takes lastname, generation, firstname, and middlename (or some partial
276: set of this data) and returns the full name version as a string. Format
277: is Lastname generation, firstname middlename or a subset of this.
278:
279: =cut
280:
281: ################################################
282: ################################################
283: sub ProcessFullName {
284: my ($lastname, $generation, $firstname, $middlename)=@_;
285: my $Str = '';
286:
287: # Strip whitespace preceeding & following name components.
288: $lastname =~ s/(\s+$|^\s+)//g;
289: $generation =~ s/(\s+$|^\s+)//g;
290: $firstname =~ s/(\s+$|^\s+)//g;
291: $middlename =~ s/(\s+$|^\s+)//g;
292:
293: if($lastname ne '') {
294: $Str .= $lastname;
295: $Str .= ' '.$generation if ($generation ne '');
296: $Str .= ',';
297: $Str .= ' '.$firstname if ($firstname ne '');
298: $Str .= ' '.$middlename if ($middlename ne '');
299: } else {
300: $Str .= $firstname if ($firstname ne '');
301: $Str .= ' '.$middlename if ($middlename ne '');
302: $Str .= ' '.$generation if ($generation ne '');
303: }
304:
305: return $Str;
306: }
307:
308: ################################################
309: ################################################
310:
311: =pod
312:
313: =item &make_into_hash($values);
314:
315: Returns a reference to a hash as described by $values. $values is
316: assumed to be the result of
317: join(':',map {&Apache::lonnet::escape($_)} %orighash);
318:
319: This is a helper function for get_current_state.
320:
321: =cut
322:
323: ################################################
324: ################################################
325: sub make_into_hash {
326: my $values = shift;
327: my %tmp = map { &Apache::lonnet::unescape($_); }
328: split(':',$values);
329: return \%tmp;
330: }
331:
332:
333: ################################################
334: ################################################
335:
336: =pod
337:
338: =head1 LOCAL DATA CACHING SUBROUTINES
339:
340: The local caching is done using MySQL. There is no fall-back implementation
341: if MySQL is not running.
342:
343: The programmers interface is to call &get_current_state() or some other
344: primary interface subroutine (described below). The internals of this
345: storage system are documented here.
346:
347: There are six tables used to store student performance data (the results of
348: a dumpcurrent). Each of these tables is created in MySQL with a name of
349: $courseid_*****, where ***** is 'symb', 'part', or whatever is appropriate
350: for the table. The tables and their purposes are described below.
351:
352: Some notes before we get started.
353:
354: Each table must have a PRIMARY KEY, which is a column or set of columns which
355: will serve to uniquely identify a row of data. NULL is not allowed!
356:
357: INDEXes work best on integer data.
358:
359: JOIN is used to combine data from many tables into one output.
360:
361: lonmysql.pm is used for some of the interface, specifically the table creation
362: calls. The inserts are done in bulk by directly calling the database handler.
363: The SELECT ... JOIN statement used to retrieve the data does not have an
364: interface in lonmysql.pm and I shudder at the thought of writing one.
365:
366: =head3 Table Descriptions
367:
368: =over 4
369:
370: =item Tables used to store meta information
371:
372: The following tables hold data required to keep track of the current status
373: of a students data in the tables or to look up the students data in the tables.
374:
375: =over 4
376:
377: =item $symb_table
378:
379: The symb_table has two columns. The first is a 'symb_id' and the second
380: is the text name for the 'symb' (limited to 64k). The 'symb_id' is generated
381: automatically by MySQL so inserts should be done on this table with an
382: empty first element. This table has its PRIMARY KEY on the 'symb_id'.
383:
384: =item $part_table
385:
386: The part_table has two columns. The first is a 'part_id' and the second
387: is the text name for the 'part' (limited to 100 characters). The 'part_id' is
388: generated automatically by MySQL so inserts should be done on this table with
389: an empty first element. This table has its PRIMARY KEY on the 'part' (100
390: characters) and a KEY on 'part_id'.
391:
392: =item $student_table
393:
394: The student_table has 7 columns. The first is a 'student_id' assigned by
395: MySQL. The second is 'student' which is username:domain. The third through
396: fifth are 'section', 'status' (enrollment status), and 'classification'
397: (to be used in the future). The sixth and seventh ('updatetime' and
398: 'fullupdatetime') contain the time of last update and full update of student
399: data. This table has its PRIMARY KEY on the 'student_id' column and is indexed
400: on 'student', 'section', and 'status'.
401:
402: =back
403:
404: =item Tables used to store current status data
405:
406: The following tables store data only about the students current status on
407: a problem, meaning only the data related to the last attempt on a problem.
408:
409: =over 4
410:
411: =item $performance_table
412:
413: The performance_table has 9 columns. The first three are 'symb_id',
414: 'student_id', and 'part_id'. These comprise the PRIMARY KEY for this table
415: and are directly related to the $symb_table, $student_table, and $part_table
416: described above. MySQL does better indexing on numeric items than text,
417: so we use these three "index tables". The remaining columns are
418: 'solved', 'tries', 'awarded', 'award', 'awarddetail', and 'timestamp'.
419: These are either the MySQL type TINYTEXT or various integers ('tries' and
420: 'timestamp'). This table has KEYs of 'student_id' and 'symb_id'.
421: For use of this table, see the functions described below.
422:
423: =item $parameters_table
424:
425: The parameters_table holds the data that does not fit neatly into the
426: performance_table. The parameters table has four columns: 'symb_id',
427: 'student_id', 'parameter', and 'value'. 'symb_id', 'student_id', and
428: 'parameter' comprise the PRIMARY KEY for this table. 'parameter' is
429: limited to 255 characters. 'value' is limited to 64k characters.
430:
431: =back
432:
433: =item Tables used for storing historic data
434:
435: The following tables are used to store almost all of the transactions a student
436: has made on a homework problem. See loncapa/docs/homework/datastorage for
437: specific information about each of the parameters stored.
438:
439: =over 4
440:
441: =item $fulldump_response_table
442:
443: The response table holds data (documented in loncapa/docs/homework/datastorage)
444: associated with a particular response id which is stored when a student
445: attempts a problem. The following are the columns of the table, in order:
446: 'symb_id','part_id','response_id','student_id','transaction','tries',
447: 'awarddetail', 'response_specific' (data particular to the response
448: type), 'response_specific_value', and 'submission (the text of the students
449: submission). The primary key is based on the first five columns listed above.
450:
451: =item $fulldump_part_table
452:
453: The part table holds data (documented in loncapa/docs/homework/datastorage)
454: associated with a particular part id which is stored when a student attempts
455: a problem. The following are the columns of the table, in order:
456: 'symb_id','part_id','student_id','transaction','tries','award','awarded',
457: and 'previous'. The primary key is based on the first five columns listed
458: above.
459:
460: =item $fulldump_timestamp_table
461:
462: The timestamp table holds the timestamps of the transactions which are
463: stored in $fulldump_response_table and $fulldump_part_table. This data is
464: about both the response and part data. Columns: 'symb_id','student_id',
465: 'transaction', and 'timestamp'.
466: The primary key is based on the first 3 columns.
467:
468: =item $weight_table
469:
470: The weight table holds the weight for the problems used in the class.
471: Whereas the weight of a problem can vary by section and student the data
472: here is applied to the class as a whole.
473: Columns: 'symb_id','part_id','response_id','weight'.
474:
475: =back
476:
477: =back
478:
479: =head3 Important Subroutines
480:
481: Here is a brief overview of the subroutines which are likely to be of
482: interest:
483:
484: =over 4
485:
486: =item &get_current_state(): programmers interface.
487:
488: =item &init_dbs(): table creation
489:
490: =item &update_student_data(): data storage calls
491:
492: =item &get_student_data_from_performance_cache(): data retrieval
493:
494: =back
495:
496: =head3 Main Documentation
497:
498: =over 4
499:
500: =cut
501:
502: ################################################
503: ################################################
504:
505: ################################################
506: ################################################
507: { # Begin scope of table identifiers
508:
509: my $current_course ='';
510: my $symb_table;
511: my $part_table;
512: my $student_table;
513: my $performance_table;
514: my $parameters_table;
515: my $fulldump_response_table;
516: my $fulldump_part_table;
517: my $fulldump_timestamp_table;
518: my $weight_table;
519:
520: my @Tables;
521: ################################################
522: ################################################
523:
524: =pod
525:
526: =item &init_dbs()
527:
528: Input: course id
529:
530: Output: 0 on success, positive integer on error
531:
532: This routine issues the calls to lonmysql to create the tables used to
533: store student data.
534:
535: =cut
536:
537: ################################################
538: ################################################
539: sub init_dbs {
540: my ($courseid,$drop) = @_;
541: &setup_table_names($courseid);
542: #
543: # Drop any of the existing tables
544: if ($drop) {
545: foreach my $table (@Tables) {
546: &Apache::lonmysql::drop_table($table);
547: }
548: }
549: #
550: # Note - changes to this table must be reflected in the code that
551: # stores the data (calls &Apache::lonmysql::store_row with this table
552: # id
553: my $symb_table_def = {
554: id => $symb_table,
555: permanent => 'no',
556: columns => [{ name => 'symb_id',
557: type => 'MEDIUMINT UNSIGNED',
558: restrictions => 'NOT NULL',
559: auto_inc => 'yes', },
560: { name => 'symb',
561: type => 'MEDIUMTEXT',
562: restrictions => 'NOT NULL'},
563: ],
564: 'PRIMARY KEY' => ['symb_id'],
565: };
566: #
567: my $part_table_def = {
568: id => $part_table,
569: permanent => 'no',
570: columns => [{ name => 'part_id',
571: type => 'MEDIUMINT UNSIGNED',
572: restrictions => 'NOT NULL',
573: auto_inc => 'yes', },
574: { name => 'part',
575: type => 'VARCHAR(100) BINARY',
576: restrictions => 'NOT NULL'},
577: ],
578: 'PRIMARY KEY' => ['part (100)'],
579: 'KEY' => [{ columns => ['part_id']},],
580: };
581: #
582: my $student_table_def = {
583: id => $student_table,
584: permanent => 'no',
585: columns => [{ name => 'student_id',
586: type => 'MEDIUMINT UNSIGNED',
587: restrictions => 'NOT NULL',
588: auto_inc => 'yes', },
589: { name => 'student',
590: type => 'VARCHAR(100) BINARY',
591: restrictions => 'NOT NULL UNIQUE'},
592: { name => 'section',
593: type => 'VARCHAR(100) BINARY',
594: restrictions => 'NOT NULL'},
595: { name => 'status',
596: type => 'VARCHAR(15) BINARY',
597: restrictions => 'NOT NULL'},
598: { name => 'classification',
599: type => 'VARCHAR(100) BINARY', },
600: { name => 'updatetime',
601: type => 'INT UNSIGNED'},
602: { name => 'fullupdatetime',
603: type => 'INT UNSIGNED'},
604: ],
605: 'PRIMARY KEY' => ['student_id'],
606: 'KEY' => [{ columns => ['student (100)',
607: 'section (100)',
608: 'status (15)',]},],
609: };
610: #
611: my $performance_table_def = {
612: id => $performance_table,
613: permanent => 'no',
614: columns => [{ name => 'symb_id',
615: type => 'MEDIUMINT UNSIGNED',
616: restrictions => 'NOT NULL' },
617: { name => 'student_id',
618: type => 'MEDIUMINT UNSIGNED',
619: restrictions => 'NOT NULL' },
620: { name => 'part_id',
621: type => 'MEDIUMINT UNSIGNED',
622: restrictions => 'NOT NULL' },
623: { name => 'part',
624: type => 'VARCHAR(100) BINARY',
625: restrictions => 'NOT NULL'},
626: { name => 'solved',
627: type => 'TINYTEXT' },
628: { name => 'tries',
629: type => 'SMALLINT UNSIGNED' },
630: { name => 'awarded',
631: type => 'REAL' },
632: { name => 'award',
633: type => 'TINYTEXT' },
634: { name => 'awarddetail',
635: type => 'TINYTEXT' },
636: { name => 'timestamp',
637: type => 'INT UNSIGNED'},
638: ],
639: 'PRIMARY KEY' => ['symb_id','student_id','part_id'],
640: 'KEY' => [{ columns=>['student_id'] },
641: { columns=>['symb_id'] },],
642: };
643: #
644: my $fulldump_part_table_def = {
645: id => $fulldump_part_table,
646: permanent => 'no',
647: columns => [
648: { name => 'symb_id',
649: type => 'MEDIUMINT UNSIGNED',
650: restrictions => 'NOT NULL' },
651: { name => 'part_id',
652: type => 'MEDIUMINT UNSIGNED',
653: restrictions => 'NOT NULL' },
654: { name => 'student_id',
655: type => 'MEDIUMINT UNSIGNED',
656: restrictions => 'NOT NULL' },
657: { name => 'transaction',
658: type => 'MEDIUMINT UNSIGNED',
659: restrictions => 'NOT NULL' },
660: { name => 'tries',
661: type => 'SMALLINT UNSIGNED',
662: restrictions => 'NOT NULL' },
663: { name => 'award',
664: type => 'TINYTEXT' },
665: { name => 'awarded',
666: type => 'REAL' },
667: { name => 'previous',
668: type => 'SMALLINT UNSIGNED' },
669: # { name => 'regrader',
670: # type => 'TINYTEXT' },
671: # { name => 'afterduedate',
672: # type => 'TINYTEXT' },
673: ],
674: 'PRIMARY KEY' => ['symb_id','part_id','student_id','transaction'],
675: 'KEY' => [
676: { columns=>['symb_id'] },
677: { columns=>['part_id'] },
678: { columns=>['student_id'] },
679: ],
680: };
681: #
682: my $fulldump_response_table_def = {
683: id => $fulldump_response_table,
684: permanent => 'no',
685: columns => [
686: { name => 'symb_id',
687: type => 'MEDIUMINT UNSIGNED',
688: restrictions => 'NOT NULL' },
689: { name => 'part_id',
690: type => 'MEDIUMINT UNSIGNED',
691: restrictions => 'NOT NULL' },
692: { name => 'response_id',
693: type => 'MEDIUMINT UNSIGNED',
694: restrictions => 'NOT NULL' },
695: { name => 'student_id',
696: type => 'MEDIUMINT UNSIGNED',
697: restrictions => 'NOT NULL' },
698: { name => 'transaction',
699: type => 'MEDIUMINT UNSIGNED',
700: restrictions => 'NOT NULL' },
701: { name => 'awarddetail',
702: type => 'TINYTEXT' },
703: # { name => 'message',
704: # type => 'CHAR BINARY'},
705: { name => 'response_specific',
706: type => 'TINYTEXT' },
707: { name => 'response_specific_value',
708: type => 'TINYTEXT' },
709: { name => 'submission',
710: type => 'TEXT'},
711: ],
712: 'PRIMARY KEY' => ['symb_id','part_id','response_id','student_id',
713: 'transaction'],
714: 'KEY' => [
715: { columns=>['symb_id'] },
716: { columns=>['part_id','response_id'] },
717: { columns=>['student_id'] },
718: ],
719: };
720: my $fulldump_timestamp_table_def = {
721: id => $fulldump_timestamp_table,
722: permanent => 'no',
723: columns => [
724: { name => 'symb_id',
725: type => 'MEDIUMINT UNSIGNED',
726: restrictions => 'NOT NULL' },
727: { name => 'student_id',
728: type => 'MEDIUMINT UNSIGNED',
729: restrictions => 'NOT NULL' },
730: { name => 'transaction',
731: type => 'MEDIUMINT UNSIGNED',
732: restrictions => 'NOT NULL' },
733: { name => 'timestamp',
734: type => 'INT UNSIGNED'},
735: ],
736: 'PRIMARY KEY' => ['symb_id','student_id','transaction'],
737: 'KEY' => [
738: { columns=>['symb_id'] },
739: { columns=>['student_id'] },
740: { columns=>['transaction'] },
741: ],
742: };
743: #
744: my $parameters_table_def = {
745: id => $parameters_table,
746: permanent => 'no',
747: columns => [{ name => 'symb_id',
748: type => 'MEDIUMINT UNSIGNED',
749: restrictions => 'NOT NULL' },
750: { name => 'student_id',
751: type => 'MEDIUMINT UNSIGNED',
752: restrictions => 'NOT NULL' },
753: { name => 'parameter',
754: type => 'TINYTEXT',
755: restrictions => 'NOT NULL' },
756: { name => 'value',
757: type => 'MEDIUMTEXT' },
758: ],
759: 'PRIMARY KEY' => ['symb_id','student_id','parameter (255)'],
760: };
761: #
762: my $weight_table_def = {
763: id => $weight_table,
764: permanent => 'no',
765: columns => [{ name => 'symb_id',
766: type => 'MEDIUMINT UNSIGNED',
767: restrictions => 'NOT NULL' },
768: { name => 'part_id',
769: type => 'MEDIUMINT UNSIGNED',
770: restrictions => 'NOT NULL' },
771: { name => 'weight',
772: type => 'REAL',
773: restrictions => 'NOT NULL' },
774: ],
775: 'PRIMARY KEY' => ['symb_id','part_id'],
776: };
777: #
778: # Create the tables
779: my $tableid;
780: $tableid = &Apache::lonmysql::create_table($symb_table_def);
781: if (! defined($tableid)) {
782: &Apache::lonnet::logthis("error creating symb_table: ".
783: &Apache::lonmysql::get_error());
784: return 1;
785: }
786: #
787: $tableid = &Apache::lonmysql::create_table($part_table_def);
788: if (! defined($tableid)) {
789: &Apache::lonnet::logthis("error creating part_table: ".
790: &Apache::lonmysql::get_error());
791: return 2;
792: }
793: #
794: $tableid = &Apache::lonmysql::create_table($student_table_def);
795: if (! defined($tableid)) {
796: &Apache::lonnet::logthis("error creating student_table: ".
797: &Apache::lonmysql::get_error());
798: return 3;
799: }
800: #
801: $tableid = &Apache::lonmysql::create_table($performance_table_def);
802: if (! defined($tableid)) {
803: &Apache::lonnet::logthis("error creating preformance_table: ".
804: &Apache::lonmysql::get_error());
805: return 5;
806: }
807: #
808: $tableid = &Apache::lonmysql::create_table($parameters_table_def);
809: if (! defined($tableid)) {
810: &Apache::lonnet::logthis("error creating parameters_table: ".
811: &Apache::lonmysql::get_error());
812: return 6;
813: }
814: #
815: $tableid = &Apache::lonmysql::create_table($fulldump_part_table_def);
816: if (! defined($tableid)) {
817: &Apache::lonnet::logthis("error creating fulldump_part_table: ".
818: &Apache::lonmysql::get_error());
819: return 7;
820: }
821: #
822: $tableid = &Apache::lonmysql::create_table($fulldump_response_table_def);
823: if (! defined($tableid)) {
824: &Apache::lonnet::logthis("error creating fulldump_response_table: ".
825: &Apache::lonmysql::get_error());
826: return 8;
827: }
828: $tableid = &Apache::lonmysql::create_table($fulldump_timestamp_table_def);
829: if (! defined($tableid)) {
830: &Apache::lonnet::logthis("error creating fulldump_timestamp_table: ".
831: &Apache::lonmysql::get_error());
832: return 9;
833: }
834: $tableid = &Apache::lonmysql::create_table($weight_table_def);
835: if (! defined($tableid)) {
836: &Apache::lonnet::logthis("error creating weight_table: ".
837: &Apache::lonmysql::get_error());
838: return 10;
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{$student})) {
1043: &populate_student_table();
1044: undef(%ids_by_student);
1045: undef(%students_by_id);
1046: my @Result = &Apache::lonmysql::get_rows($student_table);
1047: foreach (@Result) {
1048: $ids_by_student{$_->[1]}=$_->[0];
1049: }
1050: }
1051: return $ids_by_student{$student} if(exists( $ids_by_student{$student}));
1052: return undef; # error
1053: }
1054:
1055: sub get_student {
1056: my ($student_id) = @_;
1057: if (! exists($students_by_id{$student_id}) ||
1058: ! defined($students_by_id{$student_id}) ||
1059: $students_by_id{$student_id} eq '') {
1060: my @Result = &Apache::lonmysql::get_rows($student_table);
1061: foreach (@Result) {
1062: $students_by_id{$_->[0]}=$_->[1];
1063: }
1064: }
1065: return $students_by_id{$student_id} if(exists($students_by_id{$student_id}));
1066: return undef; # error
1067: }
1068:
1069: sub populate_student_table {
1070: my ($courseid) = @_;
1071: if (! defined($courseid)) {
1072: $courseid = $ENV{'request.course.id'};
1073: }
1074: #
1075: &setup_table_names($courseid);
1076: &init_dbs($courseid,0);
1077: my $dbh = &Apache::lonmysql::get_dbh();
1078: my $request = 'INSERT IGNORE INTO '.$student_table.
1079: "(student,section,status) VALUES ";
1080: my $classlist = &get_classlist($courseid);
1081: my $student_count=0;
1082: while (my ($student,$data) = each %$classlist) {
1083: my ($section,$status) = ($data->[&CL_SECTION()],
1084: $data->[&CL_STATUS()]);
1085: if ($section eq '' || $section =~ /^\s*$/) {
1086: $section = 'none';
1087: }
1088: $request .= "('".$student."','".$section."','".$status."'),";
1089: $student_count++;
1090: }
1091: return if ($student_count == 0);
1092: chop($request);
1093: $dbh->do($request);
1094: if ($dbh->err()) {
1095: &Apache::lonnet::logthis("error ".$dbh->errstr().
1096: " occured executing \n".
1097: $request);
1098: }
1099: return;
1100: }
1101:
1102: ################################################
1103: ################################################
1104:
1105: =pod
1106:
1107: =item &clear_internal_caches()
1108:
1109: Causes the internal caches used in get_student_id, get_student,
1110: get_symb_id, get_symb, get_part_id, and get_part to be undef'd.
1111:
1112: Needs to be called before the first operation with the MySQL database
1113: for a given Apache request.
1114:
1115: =cut
1116:
1117: ################################################
1118: ################################################
1119: sub clear_internal_caches {
1120: $have_read_part_table = 0;
1121: undef(%ids_by_part);
1122: undef(%parts_by_id);
1123: $have_read_symb_table = 0;
1124: undef(%ids_by_symb);
1125: undef(%symbs_by_id);
1126: $have_read_student_table = 0;
1127: undef(%ids_by_student);
1128: undef(%students_by_id);
1129: }
1130:
1131:
1132: ################################################
1133: ################################################
1134:
1135: =pod
1136:
1137: =item &update_full_student_data($sname,$sdom,$courseid)
1138:
1139: Does a lonnet::dump on a student to populate the courses tables.
1140:
1141: Input: $sname, $sdom, $courseid
1142:
1143: Output: $returnstatus
1144:
1145: $returnstatus is a string describing any errors that occured. 'okay' is the
1146: default.
1147:
1148: This subroutine loads a students data using lonnet::dump and inserts
1149: it into the MySQL database. The inserts are done on three tables,
1150: $fulldump_response_table, $fulldump_part_table, and $fulldump_timestamp_table.
1151: The INSERT calls are made directly by this subroutine, not through lonmysql
1152: because we do a 'bulk'insert which takes advantage of MySQLs non-SQL
1153: compliant INSERT command to insert multiple rows at a time.
1154: If anything has gone wrong during this process, $returnstatus is updated with
1155: a description of the error.
1156:
1157: Once the "fulldump" tables are updated, the tables used for chart and
1158: spreadsheet (which hold only the current state of the student on their
1159: homework, not historical data) are updated. If all updates have occured
1160: successfully, $student_table is updated to reflect the time of the update.
1161:
1162: Notice we do not insert the data and immediately query it. This means it
1163: is possible for there to be data returned this first time that is not
1164: available the second time. CYA.
1165:
1166: =cut
1167:
1168: ################################################
1169: ################################################
1170: sub update_full_student_data {
1171: my ($sname,$sdom,$courseid) = @_;
1172: #
1173: # Set up database names
1174: &setup_table_names($courseid);
1175: #
1176: my $student_id = &get_student_id($sname,$sdom);
1177: my $student = $sname.':'.$sdom;
1178: #
1179: my $returnstatus = 'okay';
1180: #
1181: # Download students data
1182: my $time_of_retrieval = time;
1183: my @tmp = &Apache::lonnet::dump($courseid,$sdom,$sname);
1184: if (@tmp && $tmp[0] =~ /^error/) {
1185: $returnstatus = 'error retrieving full student data';
1186: return $returnstatus;
1187: } elsif (! @tmp) {
1188: $returnstatus = 'okay: no student data';
1189: return $returnstatus;
1190: }
1191: my %studentdata = @tmp;
1192: #
1193: # Get database handle and clean out the tables
1194: my $dbh = &Apache::lonmysql::get_dbh();
1195: $dbh->do('DELETE FROM '.$fulldump_response_table.' WHERE student_id='.
1196: $student_id);
1197: $dbh->do('DELETE FROM '.$fulldump_part_table.' WHERE student_id='.
1198: $student_id);
1199: $dbh->do('DELETE FROM '.$fulldump_timestamp_table.' WHERE student_id='.
1200: $student_id);
1201: #
1202: # Parse and store the data into a form we can handle
1203: my $partdata;
1204: my $respdata;
1205: while (my ($key,$value) = each(%studentdata)) {
1206: next if ($key =~ /^(\d+):(resource$|subnum$|keys:)/);
1207: my ($transaction,$symb,$parameter) = split(':',$key);
1208: my $symb_id = &get_symb_id($symb);
1209: if ($parameter eq 'timestamp') {
1210: # We can deal with 'timestamp' right away
1211: my @timestamp_storage = ($symb_id,$student_id,
1212: $transaction,$value);
1213: my $store_command = 'INSERT IGNORE INTO '.$fulldump_timestamp_table.
1214: " VALUES ('".join("','",@timestamp_storage)."');";
1215: $dbh->do($store_command);
1216: if ($dbh->err()) {
1217: &Apache::lonnet::logthis('unable to execute '.$store_command);
1218: &Apache::lonnet::logthis($dbh->errstr());
1219: }
1220: next;
1221: } elsif ($parameter eq 'version') {
1222: next;
1223: } elsif ($parameter =~ /^resource\.(.*)\.(tries|
1224: award|
1225: awarded|
1226: previous|
1227: solved|
1228: awarddetail|
1229: submission|
1230: submissiongrading|
1231: molecule)\s*$/x){
1232: # we do not have enough information to store an
1233: # entire row, so we save it up until later.
1234: my ($part_and_resp_id,$field) = ($1,$2);
1235: my ($part,$part_id,$resp,$resp_id);
1236: if ($part_and_resp_id =~ /\./) {
1237: ($part,$resp) = split(/\./,$part_and_resp_id);
1238: $part_id = &get_part_id($part);
1239: $resp_id = &get_part_id($resp);
1240: } else {
1241: $part_id = &get_part_id($part_and_resp_id);
1242: }
1243: # Deal with part specific data
1244: if ($field =~ /^(tries|award|awarded|previous)$/) {
1245: $partdata->{$symb_id}->{$part_id}->{$transaction}->{$field}=$value;
1246: }
1247: # deal with response specific data
1248: if (defined($resp_id) &&
1249: $field =~ /^(awarddetail|
1250: submission|
1251: submissiongrading|
1252: molecule)$/x) {
1253: if ($field eq 'submission') {
1254: # We have to be careful with user supplied input.
1255: # most of the time we are okay because it is escaped.
1256: # However, there is one wrinkle: submissions which end in
1257: # and odd number of '\' cause insert errors to occur.
1258: # Best trap this somehow...
1259: $value = $dbh->quote($value);
1260: }
1261: if ($field eq 'submissiongrading' ||
1262: $field eq 'molecule') {
1263: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific'}=$field;
1264: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific_value'}=$value;
1265: } else {
1266: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{$field}=$value;
1267: }
1268: }
1269: }
1270: }
1271: ##
1272: ## Store the part data
1273: my $store_command = 'INSERT IGNORE INTO '.$fulldump_part_table.
1274: ' VALUES '."\n";
1275: my $store_rows = 0;
1276: while (my ($symb_id,$hash1) = each (%$partdata)) {
1277: while (my ($part_id,$hash2) = each (%$hash1)) {
1278: while (my ($transaction,$data) = each (%$hash2)) {
1279: $store_command .= "('".join("','",$symb_id,$part_id,
1280: $student_id,
1281: $transaction,
1282: $data->{'tries'},
1283: $data->{'award'},
1284: $data->{'awarded'},
1285: $data->{'previous'})."'),";
1286: $store_rows++;
1287: }
1288: }
1289: }
1290: if ($store_rows) {
1291: chop($store_command);
1292: $dbh->do($store_command);
1293: if ($dbh->err) {
1294: $returnstatus = 'error storing part data';
1295: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
1296: &Apache::lonnet::logthis("While attempting\n".$store_command);
1297: }
1298: }
1299: ##
1300: ## Store the response data
1301: $store_command = 'INSERT IGNORE INTO '.$fulldump_response_table.
1302: ' VALUES '."\n";
1303: $store_rows = 0;
1304: while (my ($symb_id,$hash1) = each (%$respdata)) {
1305: while (my ($part_id,$hash2) = each (%$hash1)) {
1306: while (my ($resp_id,$hash3) = each (%$hash2)) {
1307: while (my ($transaction,$data) = each (%$hash3)) {
1308: my $submission = $data->{'submission'};
1309: # We have to be careful with user supplied input.
1310: # most of the time we are okay because it is escaped.
1311: # However, there is one wrinkle: submissions which end in
1312: # and odd number of '\' cause insert errors to occur.
1313: # Best trap this somehow...
1314: $submission = $dbh->quote($submission);
1315: $store_command .= "('".
1316: join("','",$symb_id,$part_id,
1317: $resp_id,$student_id,
1318: $transaction,
1319: $data->{'awarddetail'},
1320: $data->{'response_specific'},
1321: $data->{'response_specific_value'}).
1322: "',".$submission."),";
1323: $store_rows++;
1324: }
1325: }
1326: }
1327: }
1328: if ($store_rows) {
1329: chop($store_command);
1330: $dbh->do($store_command);
1331: if ($dbh->err) {
1332: $returnstatus = 'error storing response data';
1333: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
1334: &Apache::lonnet::logthis("While attempting\n".$store_command);
1335: }
1336: }
1337: ##
1338: ## Update the students "current" data in the performance
1339: ## and parameters tables.
1340: my ($status,undef) = &store_student_data
1341: ($sname,$sdom,$courseid,
1342: &Apache::lonnet::convert_dump_to_currentdump(\%studentdata));
1343: if ($returnstatus eq 'okay' && $status ne 'okay') {
1344: $returnstatus = 'error storing current data:'.$status;
1345: } elsif ($status ne 'okay') {
1346: $returnstatus .= ' error storing current data:'.$status;
1347: }
1348: ##
1349: ## Update the students time......
1350: if ($returnstatus eq 'okay') {
1351: &store_updatetime($student_id,$time_of_retrieval,$time_of_retrieval);
1352: if ($dbh->err) {
1353: if ($returnstatus eq 'okay') {
1354: $returnstatus = 'error updating student time';
1355: } else {
1356: $returnstatus = 'error updating student time';
1357: }
1358: }
1359: }
1360: return $returnstatus;
1361: }
1362:
1363: ################################################
1364: ################################################
1365:
1366: =pod
1367:
1368: =item &update_student_data()
1369:
1370: Input: $sname, $sdom, $courseid
1371:
1372: Output: $returnstatus, \%student_data
1373:
1374: $returnstatus is a string describing any errors that occured. 'okay' is the
1375: default.
1376: \%student_data is the data returned by a call to lonnet::currentdump.
1377:
1378: This subroutine loads a students data using lonnet::currentdump and inserts
1379: it into the MySQL database. The inserts are done on two tables,
1380: $performance_table and $parameters_table. $parameters_table holds the data
1381: that is not included in $performance_table. See the description of
1382: $performance_table elsewhere in this file. The INSERT calls are made
1383: directly by this subroutine, not through lonmysql because we do a 'bulk'
1384: insert which takes advantage of MySQLs non-SQL compliant INSERT command to
1385: insert multiple rows at a time. If anything has gone wrong during this
1386: process, $returnstatus is updated with a description of the error and
1387: \%student_data is returned.
1388:
1389: Notice we do not insert the data and immediately query it. This means it
1390: is possible for there to be data returned this first time that is not
1391: available the second time. CYA.
1392:
1393: =cut
1394:
1395: ################################################
1396: ################################################
1397: sub update_student_data {
1398: my ($sname,$sdom,$courseid) = @_;
1399: #
1400: # Set up database names
1401: &setup_table_names($courseid);
1402: #
1403: my $student_id = &get_student_id($sname,$sdom);
1404: my $student = $sname.':'.$sdom;
1405: #
1406: my $returnstatus = 'okay';
1407: #
1408: # Download students data
1409: my $time_of_retrieval = time;
1410: my @tmp = &Apache::lonnet::currentdump($courseid,$sdom,$sname);
1411: if ((scalar(@tmp) > 0) && ($tmp[0] =~ /^error:/)) {
1412: &Apache::lonnet::logthis('error getting data for '.
1413: $sname.':'.$sdom.' in course '.$courseid.
1414: ':'.$tmp[0]);
1415: $returnstatus = 'error getting data';
1416: return ($returnstatus,undef);
1417: }
1418: if (scalar(@tmp) < 1) {
1419: return ('no data',undef);
1420: }
1421: my %student_data = @tmp;
1422: my @Results = &store_student_data($sname,$sdom,$courseid,\%student_data);
1423: #
1424: # Set the students update time
1425: if ($Results[0] eq 'okay') {
1426: &store_updatetime($student_id,$time_of_retrieval,$time_of_retrieval);
1427: }
1428: #
1429: return @Results;
1430: }
1431:
1432: sub store_updatetime {
1433: my ($student_id,$updatetime,$fullupdatetime)=@_;
1434: my $values = '';
1435: if (defined($updatetime)) {
1436: $values = 'updatetime='.$updatetime.' ';
1437: }
1438: if (defined($fullupdatetime)) {
1439: if ($values ne '') {
1440: $values .= ',';
1441: }
1442: $values .= 'fullupdatetime='.$fullupdatetime.' ';
1443: }
1444: return if ($values eq '');
1445: my $dbh = &Apache::lonmysql::get_dbh();
1446: my $request = 'UPDATE '.$student_table.' SET '.$values.
1447: ' WHERE student_id='.$student_id.' LIMIT 1';
1448: $dbh->do($request);
1449: }
1450:
1451: sub store_student_data {
1452: my ($sname,$sdom,$courseid,$student_data) = @_;
1453: #
1454: my $student_id = &get_student_id($sname,$sdom);
1455: my $student = $sname.':'.$sdom;
1456: #
1457: my $returnstatus = 'okay';
1458: #
1459: # Remove all of the students data from the table
1460: my $dbh = &Apache::lonmysql::get_dbh();
1461: $dbh->do('DELETE FROM '.$performance_table.' WHERE student_id='.
1462: $student_id);
1463: $dbh->do('DELETE FROM '.$parameters_table.' WHERE student_id='.
1464: $student_id);
1465: #
1466: # Store away the data
1467: #
1468: my $starttime = Time::HiRes::time;
1469: my $elapsed = 0;
1470: my $rows_stored;
1471: my $store_parameters_command = 'INSERT IGNORE INTO '.$parameters_table.
1472: ' VALUES '."\n";
1473: my $num_parameters = 0;
1474: my $store_performance_command = 'INSERT IGNORE INTO '.$performance_table.
1475: ' VALUES '."\n";
1476: return ('error',undef) if (! defined($dbh));
1477: while (my ($current_symb,$param_hash) = each(%{$student_data})) {
1478: #
1479: # make sure the symb is set up properly
1480: my $symb_id = &get_symb_id($current_symb);
1481: #
1482: # Load data into the tables
1483: while (my ($parameter,$value) = each(%$param_hash)) {
1484: my $newstring;
1485: if ($parameter !~ /(timestamp|resource\.(.*)\.(solved|tries|awarded|award|awarddetail|previous))/) {
1486: $newstring = "('".join("','",
1487: $symb_id,$student_id,
1488: $parameter)."',".
1489: $dbh->quote($value)."),\n";
1490: $num_parameters ++;
1491: if ($newstring !~ /''/) {
1492: $store_parameters_command .= $newstring;
1493: $rows_stored++;
1494: }
1495: }
1496: next if ($parameter !~ /^resource\.(.*)\.solved$/);
1497: #
1498: my $part = $1;
1499: my $part_id = &get_part_id($part);
1500: next if (!defined($part_id));
1501: my $solved = $value;
1502: my $tries = $param_hash->{'resource.'.$part.'.tries'};
1503: my $awarded = $param_hash->{'resource.'.$part.'.awarded'};
1504: my $award = $param_hash->{'resource.'.$part.'.award'};
1505: my $awarddetail = $param_hash->{'resource.'.$part.'.awarddetail'};
1506: my $timestamp = $param_hash->{'timestamp'};
1507: #
1508: $solved = '' if (! defined($solved));
1509: $tries = '' if (! defined($tries));
1510: $awarded = '' if (! defined($awarded));
1511: $award = '' if (! defined($award));
1512: $awarddetail = '' if (! defined($awarddetail));
1513: $newstring = "('".join("','",$symb_id,$student_id,$part_id,$part,
1514: $solved,$tries,$awarded,$award,
1515: $awarddetail,$timestamp)."'),\n";
1516: $store_performance_command .= $newstring;
1517: $rows_stored++;
1518: }
1519: }
1520: chop $store_parameters_command;
1521: chop $store_parameters_command;
1522: chop $store_performance_command;
1523: chop $store_performance_command;
1524: my $start = Time::HiRes::time;
1525: $dbh->do($store_performance_command);
1526: if ($dbh->err()) {
1527: &Apache::lonnet::logthis(' bigass insert error:'.$dbh->errstr());
1528: &Apache::lonnet::logthis('command = '.$store_performance_command);
1529: $returnstatus = 'error: unable to insert performance into database';
1530: return ($returnstatus,$student_data);
1531: }
1532: $dbh->do($store_parameters_command) if ($num_parameters>0);
1533: if ($dbh->err()) {
1534: &Apache::lonnet::logthis(' bigass insert error:'.$dbh->errstr());
1535: &Apache::lonnet::logthis('command = '.$store_parameters_command);
1536: &Apache::lonnet::logthis('rows_stored = '.$rows_stored);
1537: &Apache::lonnet::logthis('student_id = '.$student_id);
1538: $returnstatus = 'error: unable to insert parameters into database';
1539: return ($returnstatus,$student_data);
1540: }
1541: $elapsed += Time::HiRes::time - $start;
1542: return ($returnstatus,$student_data);
1543: }
1544:
1545: ######################################
1546: ######################################
1547:
1548: =pod
1549:
1550: =item &ensure_tables_are_set_up($courseid)
1551:
1552: Checks to be sure the MySQL tables for the given class are set up.
1553: If $courseid is omitted it will be obtained from the environment.
1554:
1555: Returns nothing on success and 'error' on failure
1556:
1557: =cut
1558:
1559: ######################################
1560: ######################################
1561: sub ensure_tables_are_set_up {
1562: my ($courseid) = @_;
1563: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1564: #
1565: # Clean out package variables
1566: &setup_table_names($courseid);
1567: #
1568: # if the tables do not exist, make them
1569: my @CurrentTable = &Apache::lonmysql::tables_in_db();
1570: my ($found_symb,$found_student,$found_part,
1571: $found_performance,$found_parameters,$found_fulldump_part,
1572: $found_fulldump_response,$found_fulldump_timestamp,
1573: $found_weight);
1574: foreach (@CurrentTable) {
1575: $found_symb = 1 if ($_ eq $symb_table);
1576: $found_student = 1 if ($_ eq $student_table);
1577: $found_part = 1 if ($_ eq $part_table);
1578: $found_performance = 1 if ($_ eq $performance_table);
1579: $found_parameters = 1 if ($_ eq $parameters_table);
1580: $found_fulldump_part = 1 if ($_ eq $fulldump_part_table);
1581: $found_fulldump_response = 1 if ($_ eq $fulldump_response_table);
1582: $found_fulldump_timestamp = 1 if ($_ eq $fulldump_timestamp_table);
1583: $found_weight = 1 if ($_ eq $weight_table);
1584: }
1585: if (!$found_symb ||
1586: !$found_student || !$found_part ||
1587: !$found_performance || !$found_parameters ||
1588: !$found_fulldump_part || !$found_fulldump_response ||
1589: !$found_fulldump_timestamp || !$found_weight ) {
1590: if (&init_dbs($courseid,1)) {
1591: return 'error';
1592: }
1593: }
1594: }
1595:
1596: ################################################
1597: ################################################
1598:
1599: =pod
1600:
1601: =item &ensure_current_data()
1602:
1603: Input: $sname, $sdom, $courseid
1604:
1605: Output: $status, $data
1606:
1607: This routine ensures the data for a given student is up to date.
1608: The $student_table is queried to determine the time of the last update.
1609: If the students data is out of date, &update_student_data() is called.
1610: The return values from the call to &update_student_data() are returned.
1611:
1612: =cut
1613:
1614: ################################################
1615: ################################################
1616: sub ensure_current_data {
1617: my ($sname,$sdom,$courseid) = @_;
1618: my $status = 'okay'; # return value
1619: #
1620: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1621: &ensure_tables_are_set_up($courseid);
1622: #
1623: # Get the update time for the user
1624: my $updatetime = 0;
1625: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1626: ($sdom,$sname,$courseid.'.db',
1627: $Apache::lonnet::perlvar{'lonUsersDir'});
1628: #
1629: my $student_id = &get_student_id($sname,$sdom);
1630: my @Result = &Apache::lonmysql::get_rows($student_table,
1631: "student_id ='$student_id'");
1632: my $data = undef;
1633: if (@Result) {
1634: $updatetime = $Result[0]->[5]; # Ack! This is dumb!
1635: }
1636: if ($modifiedtime > $updatetime) {
1637: ($status,$data) = &update_student_data($sname,$sdom,$courseid);
1638: }
1639: return ($status,$data);
1640: }
1641:
1642: ################################################
1643: ################################################
1644:
1645: =pod
1646:
1647: =item &ensure_current_full_data($sname,$sdom,$courseid)
1648:
1649: Input: $sname, $sdom, $courseid
1650:
1651: Output: $status
1652:
1653: This routine ensures the fulldata (the data from a lonnet::dump, not a
1654: lonnet::currentdump) for a given student is up to date.
1655: The $student_table is queried to determine the time of the last update.
1656: If the students fulldata is out of date, &update_full_student_data() is
1657: called.
1658:
1659: The return value from the call to &update_full_student_data() is returned.
1660:
1661: =cut
1662:
1663: ################################################
1664: ################################################
1665: sub ensure_current_full_data {
1666: my ($sname,$sdom,$courseid) = @_;
1667: my $status = 'okay'; # return value
1668: #
1669: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1670: &ensure_tables_are_set_up($courseid);
1671: #
1672: # Get the update time for the user
1673: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1674: ($sdom,$sname,$courseid.'.db',
1675: $Apache::lonnet::perlvar{'lonUsersDir'});
1676: #
1677: my $student_id = &get_student_id($sname,$sdom);
1678: my @Result = &Apache::lonmysql::get_rows($student_table,
1679: "student_id ='$student_id'");
1680: my $updatetime;
1681: if (@Result && ref($Result[0]) eq 'ARRAY') {
1682: $updatetime = $Result[0]->[6];
1683: }
1684: if (! defined($updatetime) || $modifiedtime > $updatetime) {
1685: $status = &update_full_student_data($sname,$sdom,$courseid);
1686: }
1687: return $status;
1688: }
1689:
1690: ################################################
1691: ################################################
1692:
1693: =pod
1694:
1695: =item &get_student_data_from_performance_cache()
1696:
1697: Input: $sname, $sdom, $symb, $courseid
1698:
1699: Output: hash reference containing the data for the given student.
1700: If $symb is undef, all the students data is returned.
1701:
1702: This routine is the heart of the local caching system. See the description
1703: of $performance_table, $symb_table, $student_table, and $part_table. The
1704: main task is building the MySQL request. The tables appear in the request
1705: in the order in which they should be parsed by MySQL. When searching
1706: on a student the $student_table is used to locate the 'student_id'. All
1707: rows in $performance_table which have a matching 'student_id' are returned,
1708: with data from $part_table and $symb_table which match the entries in
1709: $performance_table, 'part_id' and 'symb_id'. When searching on a symb,
1710: the $symb_table is processed first, with matching rows grabbed from
1711: $performance_table and filled in from $part_table and $student_table in
1712: that order.
1713:
1714: Running 'EXPLAIN ' on the 'SELECT' statements generated can be quite
1715: interesting, especially if you play with the order the tables are listed.
1716:
1717: =cut
1718:
1719: ################################################
1720: ################################################
1721: sub get_student_data_from_performance_cache {
1722: my ($sname,$sdom,$symb,$courseid)=@_;
1723: my $student = $sname.':'.$sdom if (defined($sname) && defined($sdom));
1724: &setup_table_names($courseid);
1725: #
1726: # Return hash
1727: my $studentdata;
1728: #
1729: my $dbh = &Apache::lonmysql::get_dbh();
1730: my $request = "SELECT ".
1731: "d.symb,a.part,a.solved,a.tries,a.awarded,a.award,a.awarddetail,".
1732: "a.timestamp ";
1733: if (defined($student)) {
1734: $request .= "FROM $student_table AS b ".
1735: "LEFT JOIN $performance_table AS a ON b.student_id=a.student_id ".
1736: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1737: "LEFT JOIN $symb_table AS d ON d.symb_id = a.symb_id ".
1738: "WHERE student='$student'";
1739: if (defined($symb) && $symb ne '') {
1740: $request .= " AND d.symb=".$dbh->quote($symb);
1741: }
1742: } elsif (defined($symb) && $symb ne '') {
1743: $request .= "FROM $symb_table as d ".
1744: "LEFT JOIN $performance_table AS a ON d.symb_id=a.symb_id ".
1745: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1746: "LEFT JOIN $student_table AS b ON b.student_id = a.student_id ".
1747: "WHERE symb='".$dbh->quote($symb)."'";
1748: }
1749: my $starttime = Time::HiRes::time;
1750: my $rows_retrieved = 0;
1751: my $sth = $dbh->prepare($request);
1752: $sth->execute();
1753: if ($sth->err()) {
1754: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1755: &Apache::lonnet::logthis("\n".$request."\n");
1756: &Apache::lonnet::logthis("error is:".$sth->errstr());
1757: return undef;
1758: }
1759: foreach my $row (@{$sth->fetchall_arrayref}) {
1760: $rows_retrieved++;
1761: my ($symb,$part,$solved,$tries,$awarded,$award,$awarddetail,$time) =
1762: (@$row);
1763: my $base = 'resource.'.$part;
1764: $studentdata->{$symb}->{$base.'.solved'} = $solved;
1765: $studentdata->{$symb}->{$base.'.tries'} = $tries;
1766: $studentdata->{$symb}->{$base.'.awarded'} = $awarded;
1767: $studentdata->{$symb}->{$base.'.award'} = $award;
1768: $studentdata->{$symb}->{$base.'.awarddetail'} = $awarddetail;
1769: $studentdata->{$symb}->{'timestamp'} = $time if (defined($time) && $time ne '');
1770: }
1771: ## Get misc parameters
1772: $request = 'SELECT c.symb,a.parameter,a.value '.
1773: "FROM $student_table AS b ".
1774: "LEFT JOIN $parameters_table AS a ON b.student_id=a.student_id ".
1775: "LEFT JOIN $symb_table AS c ON c.symb_id = a.symb_id ".
1776: "WHERE student='$student'";
1777: if (defined($symb) && $symb ne '') {
1778: $request .= " AND c.symb=".$dbh->quote($symb);
1779: }
1780: $sth = $dbh->prepare($request);
1781: $sth->execute();
1782: if ($sth->err()) {
1783: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1784: &Apache::lonnet::logthis("\n".$request."\n");
1785: &Apache::lonnet::logthis("error is:".$sth->errstr());
1786: if (defined($symb) && $symb ne '') {
1787: $studentdata = $studentdata->{$symb};
1788: }
1789: return $studentdata;
1790: }
1791: #
1792: foreach my $row (@{$sth->fetchall_arrayref}) {
1793: $rows_retrieved++;
1794: my ($symb,$parameter,$value) = (@$row);
1795: $studentdata->{$symb}->{$parameter} = $value;
1796: }
1797: #
1798: if (defined($symb) && $symb ne '') {
1799: $studentdata = $studentdata->{$symb};
1800: }
1801: return $studentdata;
1802: }
1803:
1804: ################################################
1805: ################################################
1806:
1807: =pod
1808:
1809: =item &get_current_state()
1810:
1811: Input: $sname,$sdom,$symb,$courseid
1812:
1813: Output: Described below
1814:
1815: Retrieve the current status of a students performance. $sname and
1816: $sdom are the only required parameters. If $symb is undef the results
1817: of an &Apache::lonnet::currentdump() will be returned.
1818: If $courseid is undef it will be retrieved from the environment.
1819:
1820: The return structure is based on &Apache::lonnet::currentdump. If
1821: $symb is unspecified, all the students data is returned in a hash of
1822: the form:
1823: (
1824: symb1 => { param1 => value1, param2 => value2 ... },
1825: symb2 => { param1 => value1, param2 => value2 ... },
1826: )
1827:
1828: If $symb is specified, a hash of
1829: (
1830: param1 => value1,
1831: param2 => value2,
1832: )
1833: is returned.
1834:
1835: If no data is found for $symb, or if the student has no performance data,
1836: an empty list is returned.
1837:
1838: =cut
1839:
1840: ################################################
1841: ################################################
1842: sub get_current_state {
1843: my ($sname,$sdom,$symb,$courseid,$forcedownload)=@_;
1844: #
1845: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1846: #
1847: return () if (! defined($sname) || ! defined($sdom));
1848: #
1849: my ($status,$data) = &ensure_current_data($sname,$sdom,$courseid);
1850: # &Apache::lonnet::logthis
1851: # ('sname = '.$sname.
1852: # ' domain = '.$sdom.
1853: # ' status = '.$status.
1854: # ' data is '.(defined($data)?'defined':'undefined'));
1855: # while (my ($symb,$hash) = each(%$data)) {
1856: # &Apache::lonnet::logthis($symb."\n----------------------------------");
1857: # while (my ($key,$value) = each (%$hash)) {
1858: # &Apache::lonnet::logthis(" ".$key." = ".$value);
1859: # }
1860: # }
1861: #
1862: if (defined($data) && defined($symb) && ref($data->{$symb})) {
1863: return %{$data->{$symb}};
1864: } elsif (defined($data) && ! defined($symb) && ref($data)) {
1865: return %$data;
1866: }
1867: if ($status eq 'no data') {
1868: return ();
1869: } else {
1870: if ($status ne 'okay' && $status ne '') {
1871: &Apache::lonnet::logthis('status = '.$status);
1872: return ();
1873: }
1874: my $returnhash = &get_student_data_from_performance_cache($sname,$sdom,
1875: $symb,$courseid);
1876: return %$returnhash if (defined($returnhash));
1877: }
1878: return ();
1879: }
1880:
1881: ################################################
1882: ################################################
1883:
1884: =pod
1885:
1886: =item &get_problem_statistics()
1887:
1888: Gather data on a given problem. The database is assumed to be
1889: populated and all local caching variables are assumed to be set
1890: properly. This means you need to call &ensure_current_data for
1891: the students you are concerned with prior to calling this routine.
1892:
1893: Inputs: $Sections, $status, $symb, $part, $courseid, $starttime, $endtime
1894:
1895: =over 4
1896:
1897: =item $Sections Array ref containing section names for students.
1898: 'all' is allowed to be the first (and only) item in the array.
1899:
1900: =item $status String describing the status of students
1901:
1902: =item $symb is the symb for the problem.
1903:
1904: =item $part is the part id you need statistics for
1905:
1906: =item $courseid is the course id, of course!
1907:
1908: =item $starttime and $endtime are unix times which to use to limit
1909: the statistical data.
1910:
1911: =back
1912:
1913: Outputs: See the code for up to date information. A hash reference is
1914: returned. The hash has the following keys defined:
1915:
1916: =over 4
1917:
1918: =item num_students The number of students attempting the problem
1919:
1920: =item tries The total number of tries for the students
1921:
1922: =item max_tries The maximum number of tries taken
1923:
1924: =item mean_tries The average number of tries
1925:
1926: =item num_solved The number of students able to solve the problem
1927:
1928: =item num_override The number of students whose answer is 'correct_by_override'
1929:
1930: =item deg_of_diff The degree of difficulty of the problem
1931:
1932: =item std_tries The standard deviation of the number of tries
1933:
1934: =item skew_tries The skew of the number of tries
1935:
1936: =item per_wrong The number of students attempting the problem who were not
1937: able to answer it correctly.
1938:
1939: =back
1940:
1941: =cut
1942:
1943: ################################################
1944: ################################################
1945: sub get_problem_statistics {
1946: my ($Sections,$status,$symb,$part,$courseid,$starttime,$endtime) = @_;
1947: return if (! defined($symb) || ! defined($part));
1948: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1949: #
1950: &setup_table_names($courseid);
1951: my $symb_id = &get_symb_id($symb);
1952: my $part_id = &get_part_id($part);
1953: my $stats_table = $courseid.'_problem_stats';
1954: #
1955: my $dbh = &Apache::lonmysql::get_dbh();
1956: return undef if (! defined($dbh));
1957: #
1958: # Clean out the table
1959: $dbh->do('DROP TABLE '.$stats_table); # May return an error
1960: my $request =
1961: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
1962: 'SELECT a.student_id,a.solved,a.award,a.awarded,a.tries '.
1963: 'FROM '.$performance_table.' AS a ';
1964: #
1965: # See if we need to include some requirements on the students
1966: if ((defined($Sections) && lc($Sections->[0]) ne 'all') ||
1967: (defined($status) && lc($status) ne 'any')) {
1968: $request .= 'NATURAL LEFT JOIN '.$student_table.' AS b ';
1969: }
1970: $request .= ' WHERE a.symb_id='.$symb_id.' AND a.part_id='.$part_id;
1971: #
1972: # Limit the students included to those specified
1973: if (defined($Sections) && lc($Sections->[0]) ne 'all') {
1974: $request .= ' AND ('.
1975: join(' OR ', map { "b.section='".$_."'" } @$Sections
1976: ).')';
1977: }
1978: if (defined($status) && lc($status) ne 'any') {
1979: $request .= " AND b.status='".$status."'";
1980: }
1981: #
1982: # Limit by starttime and endtime
1983: my $time_requirements = undef;
1984: if (defined($starttime)) {
1985: $time_requirements .= 'a.timestamp>='.$starttime;
1986: if (defined($endtime)) {
1987: $time_requirements .= ' AND a.timestamp<='.$endtime;
1988: }
1989: } elsif (defined($endtime)) {
1990: $time_requirements .= 'a.timestamp<='.$endtime;
1991: }
1992: if (defined($time_requirements)) {
1993: $request .= ' AND '.$time_requirements;
1994: }
1995: #
1996: # Finally, execute the request to create the temporary table
1997: $dbh->do($request);
1998: #
1999: # Collect the first suite of statistics
2000: $request = 'SELECT COUNT(*),SUM(tries),'.
2001: 'AVG(tries),STD(tries) '.
2002: 'FROM '.$stats_table;
2003: my ($num,$tries,$mean,$STD) = &execute_SQL_request
2004: ($dbh,$request);
2005: #
2006: $request = 'SELECT MAX(tries),MIN(tries) FROM '.$stats_table.
2007: ' WHERE awarded>0';
2008: if (defined($time_requirements)) {
2009: $request .= ' AND '.$time_requirements;
2010: }
2011: my ($max,$min) = &execute_SQL_request($dbh,$request);
2012: #
2013: $request = 'SELECT SUM(awarded) FROM '.$stats_table;
2014: if (defined($time_requirements)) {
2015: $request .= ' AND '.$time_requirements;
2016: }
2017: my ($Solved) = &execute_SQL_request($dbh,$request);
2018: #
2019: $request = 'SELECT SUM(awarded) FROM '.$stats_table.
2020: " WHERE solved='correct_by_override'";
2021: if (defined($time_requirements)) {
2022: $request .= ' AND '.$time_requirements;
2023: }
2024: my ($solved) = &execute_SQL_request($dbh,$request);
2025: #
2026: $Solved -= $solved;
2027: #
2028: $num = 0 if (! defined($num));
2029: $tries = 0 if (! defined($tries));
2030: $max = 0 if (! defined($max));
2031: $min = 0 if (! defined($min));
2032: $STD = 0 if (! defined($STD));
2033: $Solved = 0 if (! defined($Solved) || $Solved < 0);
2034: $solved = 0 if (! defined($solved));
2035: #
2036: # Compute the more complicated statistics
2037: my $DegOfDiff = 'nan';
2038: $DegOfDiff = 1-($Solved)/$tries if ($tries>0);
2039: #
2040: my $SKEW = 'nan';
2041: my $wrongpercent = 0;
2042: my $numwrong = 'nan';
2043: if ($num > 0) {
2044: ($SKEW) = &execute_SQL_request($dbh,'SELECT SQRT(SUM('.
2045: 'POWER(tries - '.$STD.',3)'.
2046: '))/'.$num.' FROM '.$stats_table);
2047: $numwrong = $num-$Solved;
2048: $wrongpercent=int(10*100*$numwrong/$num)/10;
2049: }
2050: #
2051: # Drop the temporary table
2052: $dbh->do('DROP TABLE '.$stats_table); # May return an error
2053: #
2054: # Return result
2055: return { num_students => $num,
2056: tries => $tries,
2057: max_tries => $max,
2058: min_tries => $min,
2059: mean_tries => $mean,
2060: std_tries => $STD,
2061: skew_tries => $SKEW,
2062: num_solved => $Solved,
2063: num_override => $solved,
2064: num_wrong => $numwrong,
2065: per_wrong => $wrongpercent,
2066: deg_of_diff => $DegOfDiff };
2067: }
2068:
2069: ##
2070: ## This is a helper for get_statistics
2071: sub execute_SQL_request {
2072: my ($dbh,$request)=@_;
2073: # &Apache::lonnet::logthis($request);
2074: my $sth = $dbh->prepare($request);
2075: $sth->execute();
2076: my $row = $sth->fetchrow_arrayref();
2077: if (ref($row) eq 'ARRAY' && scalar(@$row)>0) {
2078: return @$row;
2079: }
2080: return ();
2081: }
2082:
2083: ######################################################
2084: ######################################################
2085:
2086: =pod
2087:
2088: =item &populate_weight_table
2089:
2090: =cut
2091:
2092: ######################################################
2093: ######################################################
2094: sub populate_weight_table {
2095: my ($courseid) = @_;
2096: if (! defined($courseid)) {
2097: $courseid = $ENV{'request.course.id'};
2098: }
2099: #
2100: &setup_table_names($courseid);
2101: my ($top,$sequences,$assessments) = get_sequence_assessment_data();
2102: if (! defined($top) || ! ref($top)) {
2103: # There has been an error, better report it
2104: &Apache::lonnet::logthis('top is undefined');
2105: return;
2106: }
2107: # Since we use lonnet::EXT to retrieve problem weights,
2108: # to ensure current data we must clear the caches out.
2109: &Apache::lonnet::clear_EXT_cache_status();
2110: my $dbh = &Apache::lonmysql::get_dbh();
2111: my $request = 'INSERT IGNORE INTO '.$weight_table.
2112: "(symb_id,part_id,weight) VALUES ";
2113: my $weight;
2114: foreach my $res (@$assessments) {
2115: my $symb_id = &get_symb_id($res->{'symb'});
2116: foreach my $part (@{$res->{'parts'}}) {
2117: my $part_id = &get_part_id($part);
2118: $weight = &Apache::lonnet::EXT('resource.'.$part.'.weight',
2119: $res->{'symb'},
2120: undef,undef,undef);
2121: if (!defined($weight) || ($weight eq '')) {
2122: $weight=1;
2123: }
2124: $request .= "('".$symb_id."','".$part_id."','".$weight."'),";
2125: }
2126: }
2127: $request =~ s/(,)$//;
2128: # &Apache::lonnet::logthis('request = '.$/.$request);
2129: $dbh->do($request);
2130: if ($dbh->err()) {
2131: &Apache::lonnet::logthis("error ".$dbh->errstr().
2132: " occured executing \n".
2133: $request);
2134: }
2135: return;
2136: }
2137:
2138: ##########################################################
2139: ##########################################################
2140:
2141: =pod
2142:
2143: =item &limit_by_start_end_times
2144:
2145: Build SQL WHERE condition which limits the data collected by the start
2146: and end times provided
2147:
2148: Inputs: $starttime, $endtime, $table
2149:
2150: Returns: $time_limits
2151:
2152: =cut
2153:
2154: ##########################################################
2155: ##########################################################
2156: sub limit_by_start_end_time {
2157: my ($starttime,$endtime,$table) = @_;
2158: my $time_requirements = undef;
2159: if (defined($starttime)) {
2160: $time_requirements .= $table.".timestamp>='".$starttime."'";
2161: if (defined($endtime)) {
2162: $time_requirements .= " AND ".$table.".timestamp<='".$endtime."'";
2163: }
2164: } elsif (defined($endtime)) {
2165: $time_requirements .= $table.".timestamp<='".$endtime."'";
2166: }
2167: return $time_requirements;
2168: }
2169:
2170: ##########################################################
2171: ##########################################################
2172:
2173: =pod
2174:
2175: =item &limit_by_section_and_status
2176:
2177: Build SQL WHERE condition which limits the data collected by section and
2178: student status.
2179:
2180: Inputs: $Sections (array ref)
2181: $enrollment (string: 'any', 'expired', 'active')
2182: $tablename The name of the table that holds the student data
2183:
2184: Returns: $student_requirements,$enrollment_requirements
2185:
2186: =cut
2187:
2188: ##########################################################
2189: ##########################################################
2190: sub limit_by_section_and_status {
2191: my ($Sections,$enrollment,$tablename) = @_;
2192: my $student_requirements = undef;
2193: if ( (defined($Sections) && $Sections->[0] ne 'all')) {
2194: $student_requirements = '('.
2195: join(' OR ', map { $tablename.".section='".$_."'" } @$Sections
2196: ).')';
2197: }
2198: #
2199: my $enrollment_requirements=undef;
2200: if (defined($enrollment) && $enrollment ne 'Any') {
2201: $enrollment_requirements = $tablename.".status='".$enrollment."'";
2202: }
2203: return ($student_requirements,$enrollment_requirements);
2204: }
2205:
2206: ######################################################
2207: ######################################################
2208:
2209: =pod
2210:
2211: =item rank_students_by_scores_on_resources
2212:
2213: Inputs:
2214: $resources: array ref of hash ref. Each hash ref needs key 'symb'.
2215: $Sections: array ref of sections to include,
2216: $enrollment: string,
2217: $courseid (may be omitted)
2218:
2219: Returns; An array of arrays. The sub arrays contain a student name and
2220: their score on the resources.
2221:
2222: =cut
2223:
2224: ######################################################
2225: ######################################################
2226: sub RNK_student { return 0; };
2227: sub RNK_score { return 1; };
2228:
2229: sub rank_students_by_scores_on_resources {
2230: my ($resources,$Sections,$enrollment,$courseid,$starttime,$endtime) = @_;
2231: return if (! defined($resources) || ! ref($resources) eq 'ARRAY');
2232: if (! defined($courseid)) {
2233: $courseid = $ENV{'request.course.id'};
2234: }
2235: #
2236: &setup_table_names($courseid);
2237: my $dbh = &Apache::lonmysql::get_dbh();
2238: my ($section_limits,$enrollment_limits)=
2239: &limit_by_section_and_status($Sections,$enrollment,'b');
2240: my $symb_limits = '('.join(' OR ',map {'a.symb_id='.&get_symb_id($_);
2241: } @$resources
2242: ).')';
2243: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
2244: my $request = 'SELECT b.student,SUM(a.awarded*w.weight) AS score FROM '.
2245: $performance_table.' AS a '.
2246: 'NATURAL LEFT JOIN '.$weight_table.' AS w '.
2247: 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.
2248: 'WHERE ';
2249: if (defined($section_limits)) {
2250: $request .= $section_limits.' AND ';
2251: }
2252: if (defined($enrollment_limits)) {
2253: $request .= $enrollment_limits.' AND ';
2254: }
2255: if (defined($time_limits)) {
2256: $request .= $time_limits.' AND ';
2257: }
2258: if ($symb_limits ne '()') {
2259: $request .= $symb_limits.' AND ';
2260: }
2261: $request =~ s/( AND )$//; # Remove extra conjunction
2262: $request =~ s/( WHERE )$//; # In case there were no limits placed on it
2263: $request .= ' GROUP BY a.student_id ORDER BY score';
2264: #&Apache::lonnet::logthis('request = '.$/.$request);
2265: my $sth = $dbh->prepare($request);
2266: $sth->execute();
2267: my $rows = $sth->fetchall_arrayref();
2268: return ($rows);
2269: }
2270:
2271: ########################################################
2272: ########################################################
2273:
2274: =pod
2275:
2276: =item &get_sum_of_scores
2277:
2278: Inputs: $resource (hash ref, needs {'symb'} key),
2279: $part, (the part id),
2280: $students (array ref, contents of array are scalars holding 'sname:sdom'),
2281: $courseid
2282:
2283: Returns: the sum of the score on the problem part over the students and the
2284: maximum possible value for the sum (taken from the weight table).
2285:
2286: =cut
2287:
2288: ########################################################
2289: ########################################################
2290: sub get_sum_of_scores {
2291: my ($resource,$part,$students,$courseid,$starttime,$endtime) = @_;
2292: if (! defined($courseid)) {
2293: $courseid = $ENV{'request.course.id'};
2294: }
2295: if (defined($students) &&
2296: ((@$students == 0) ||
2297: (@$students == 1 && (! defined($students->[0]) ||
2298: $students->[0] eq ''))
2299: )
2300: ){
2301: undef($students);
2302: }
2303: #
2304: &setup_table_names($courseid);
2305: my $dbh = &Apache::lonmysql::get_dbh();
2306: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
2307: my $request = 'SELECT SUM(a.awarded*w.weight),SUM(w.weight) FROM '.
2308: $performance_table.' AS a '.
2309: 'NATURAL LEFT JOIN '.$weight_table.' AS w ';
2310: $request .= 'WHERE a.symb_id='.&get_symb_id($resource->{'symb'}).
2311: ' AND a.part_id='.&get_part_id($part);
2312: if (defined($time_limits)) {
2313: $request .= ' AND '.$time_limits;
2314: }
2315: if (defined($students)) {
2316: $request .= ' AND ('.
2317: join(' OR ',map {'a.student_id='.&get_student_id(split(':',$_));
2318: } @$students).
2319: ')';
2320: }
2321: my $sth = $dbh->prepare($request);
2322: $sth->execute();
2323: my $rows = $sth->fetchrow_arrayref();
2324: if ($dbh->err) {
2325: &Apache::lonnet::logthis('error 1 = '.$dbh->errstr());
2326: &Apache::lonnet::logthis('prepared then executed, fetchrow_arrayrefed'.
2327: $/.$request);
2328: return (undef,undef);
2329: }
2330: return ($rows->[0],$rows->[1]);
2331: }
2332:
2333: ########################################################
2334: ########################################################
2335:
2336: =pod
2337:
2338: =item &score_stats
2339:
2340: Inputs: $Sections, $enrollment, $symbs, $starttime,
2341: $endtime, $courseid
2342:
2343: $Sections, $enrollment, $starttime, $endtime, and $courseid are the same as
2344: elsewhere in this module.
2345: $symbs is an array ref of symbs
2346:
2347: Returns: minimum, maximum, mean, s.d., number of students, and maximum
2348: possible of student scores on the given resources
2349:
2350: =cut
2351:
2352: ########################################################
2353: ########################################################
2354: sub score_stats {
2355: my ($Sections,$enrollment,$symbs,$starttime,$endtime,$courseid)=@_;
2356: if (! defined($courseid)) {
2357: $courseid = $ENV{'request.course.id'};
2358: }
2359: #
2360: &setup_table_names($courseid);
2361: my $dbh = &Apache::lonmysql::get_dbh();
2362: #
2363: my ($section_limits,$enrollment_limits)=
2364: &limit_by_section_and_status($Sections,$enrollment,'b');
2365: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
2366: my @Symbids = map { &get_symb_id($_); } @{$symbs};
2367: #
2368: my $stats_table = $courseid.'_problem_stats';
2369: my $symb_restriction = join(' OR ',map {'a.symb_id='.$_;} @Symbids);
2370: my $request = 'DROP TABLE '.$stats_table;
2371: $dbh->do($request);
2372: $request =
2373: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
2374: 'SELECT a.student_id,'.
2375: 'SUM(a.awarded*w.weight) AS score FROM '.
2376: $performance_table.' AS a '.
2377: 'NATURAL LEFT JOIN '.$weight_table.' AS w '.
2378: 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.
2379: 'WHERE ('.$symb_restriction.')';
2380: if ($time_limits) {
2381: $request .= ' AND '.$time_limits;
2382: }
2383: if ($section_limits) {
2384: $request .= ' AND '.$section_limits;
2385: }
2386: if ($enrollment_limits) {
2387: $request .= ' AND '.$enrollment_limits;
2388: }
2389: $request .= ' GROUP BY a.student_id';
2390: # &Apache::lonnet::logthis('request = '.$/.$request);
2391: my $sth = $dbh->prepare($request);
2392: $sth->execute();
2393: $request =
2394: 'SELECT AVG(score),STD(score),MAX(score),MIN(score),COUNT(score) '.
2395: 'FROM '.$stats_table;
2396: my ($ave,$std,$max,$min,$count) = &execute_SQL_request($dbh,$request);
2397: # &Apache::lonnet::logthis('request = '.$/.$request);
2398:
2399: $request = 'SELECT SUM(weight) FROM '.$weight_table.
2400: ' WHERE ('.$symb_restriction.')';
2401: my ($max_possible) = &execute_SQL_request($dbh,$request);
2402: # &Apache::lonnet::logthis('request = '.$/.$request);
2403: return($min,$max,$ave,$std,$count,$max_possible);
2404: }
2405:
2406:
2407: ########################################################
2408: ########################################################
2409:
2410: =pod
2411:
2412: =item &count_stats
2413:
2414: Inputs: $Sections, $enrollment, $symbs, $starttime,
2415: $endtime, $courseid
2416:
2417: $Sections, $enrollment, $starttime, $endtime, and $courseid are the same as
2418: elsewhere in this module.
2419: $symbs is an array ref of symbs
2420:
2421: Returns: minimum, maximum, mean, s.d., and number of students
2422: of the number of items correct on the given resources
2423:
2424: =cut
2425:
2426: ########################################################
2427: ########################################################
2428: sub count_stats {
2429: my ($Sections,$enrollment,$symbs,$starttime,$endtime,$courseid)=@_;
2430: if (! defined($courseid)) {
2431: $courseid = $ENV{'request.course.id'};
2432: }
2433: #
2434: &setup_table_names($courseid);
2435: my $dbh = &Apache::lonmysql::get_dbh();
2436: #
2437: my ($section_limits,$enrollment_limits)=
2438: &limit_by_section_and_status($Sections,$enrollment,'b');
2439: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
2440: my @Symbids = map { &get_symb_id($_); } @{$symbs};
2441: #
2442: my $stats_table = $courseid.'_problem_stats';
2443: my $symb_restriction = join(' OR ',map {'a.symb_id='.$_;} @Symbids);
2444: my $request = 'DROP TABLE '.$stats_table;
2445: $dbh->do($request);
2446: $request =
2447: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
2448: 'SELECT a.student_id,'.
2449: 'COUNT(a.award) AS count FROM '.
2450: $performance_table.' AS a '.
2451: 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.
2452: 'WHERE ('.$symb_restriction.')'.
2453: " AND a.award!='INCORRECT_ATTEMPTED'";
2454: if ($time_limits) {
2455: $request .= ' AND '.$time_limits;
2456: }
2457: if ($section_limits) {
2458: $request .= ' AND '.$section_limits;
2459: }
2460: if ($enrollment_limits) {
2461: $request .= ' AND '.$enrollment_limits;
2462: }
2463: $request .= ' GROUP BY a.student_id';
2464: # &Apache::lonnet::logthis('request = '.$/.$request);
2465: my $sth = $dbh->prepare($request);
2466: $sth->execute();
2467: $request =
2468: 'SELECT AVG(count),STD(count),MAX(count),MIN(count),COUNT(count) '.
2469: 'FROM '.$stats_table;
2470: my ($ave,$std,$max,$min,$count) = &execute_SQL_request($dbh,$request);
2471: # &Apache::lonnet::logthis('request = '.$/.$request);
2472: return($min,$max,$ave,$std,$count);
2473: }
2474:
2475: ######################################################
2476: ######################################################
2477:
2478: =pod
2479:
2480: =item get_student_data
2481:
2482: =cut
2483:
2484: ######################################################
2485: ######################################################
2486: sub get_student_data {
2487: my ($students,$courseid) = @_;
2488: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2489: &setup_table_names($courseid);
2490: my $dbh = &Apache::lonmysql::get_dbh();
2491: return undef if (! defined($dbh));
2492: my $request = 'SELECT '.
2493: 'student_id, student '.
2494: 'FROM '.$student_table;
2495: if (defined($students)) {
2496: $request .= ' WHERE ('.
2497: join(' OR ', map {'student_id='.
2498: &get_student_id($_->{'username'},
2499: $_->{'domain'})
2500: } @$students
2501: ).')';
2502: }
2503: $request.= ' ORDER BY student_id';
2504: my $sth = $dbh->prepare($request);
2505: $sth->execute();
2506: if ($dbh->err) {
2507: &Apache::lonnet::logthis('error 2 = '.$dbh->errstr());
2508: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
2509: return undef;
2510: }
2511: my $dataset = $sth->fetchall_arrayref();
2512: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2513: return $dataset;
2514: }
2515: }
2516:
2517: sub RD_student_id { return 0; }
2518: sub RD_awarddetail { return 1; }
2519: sub RD_response_eval { return 2; }
2520: sub RD_submission { return 3; }
2521: sub RD_timestamp { return 4; }
2522: sub RD_tries { return 5; }
2523: sub RD_sname { return 6; }
2524:
2525: sub get_response_data {
2526: my ($Sections,$enrollment,$symb,$response,$courseid) = @_;
2527: return undef if (! defined($symb) ||
2528: ! defined($response));
2529: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2530: #
2531: &setup_table_names($courseid);
2532: my $symb_id = &get_symb_id($symb);
2533: if (! defined($symb_id)) {
2534: &Apache::lonnet::logthis('Unable to find symb for '.$symb.' in '.$courseid);
2535: return undef;
2536: }
2537: my $response_id = &get_part_id($response);
2538: if (! defined($response_id)) {
2539: &Apache::lonnet::logthis('Unable to find id for '.$response.' in '.$courseid);
2540: return undef;
2541: }
2542: #
2543: my $dbh = &Apache::lonmysql::get_dbh();
2544: return undef if (! defined($dbh));
2545: #
2546: my ($student_requirements,$enrollment_requirements) =
2547: &limit_by_section_and_status($Sections,$enrollment,'d');
2548: my $request = 'SELECT '.
2549: 'a.student_id, a.awarddetail, a.response_specific_value, '.
2550: 'a.submission, b.timestamp, c.tries, d.student '.
2551: 'FROM '.$fulldump_response_table.' AS a '.
2552: 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2553: 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2554: 'a.transaction = b.transaction '.
2555: 'LEFT JOIN '.$fulldump_part_table.' AS c '.
2556: 'ON a.symb_id=c.symb_id AND a.student_id=c.student_id AND '.
2557: 'a.part_id=c.part_id AND a.transaction = c.transaction '.
2558: 'LEFT JOIN '.$student_table.' AS d '.
2559: 'ON a.student_id=d.student_id '.
2560: 'WHERE '.
2561: 'a.symb_id='.$symb_id.' AND a.response_id='.$response_id;
2562: if (defined($student_requirements) || defined($enrollment_requirements)) {
2563: $request .= ' AND ';
2564: if (defined($student_requirements)) {
2565: $request .= $student_requirements.' AND ';
2566: }
2567: if (defined($enrollment_requirements)) {
2568: $request .= $enrollment_requirements.' AND ';
2569: }
2570: $request =~ s/( AND )$//;
2571: }
2572: $request .= ' ORDER BY b.timestamp';
2573: # &Apache::lonnet::logthis("request =\n".$request);
2574: my $sth = $dbh->prepare($request);
2575: $sth->execute();
2576: if ($dbh->err) {
2577: &Apache::lonnet::logthis('error 3 = '.$dbh->errstr());
2578: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
2579: return undef;
2580: }
2581: my $dataset = $sth->fetchall_arrayref();
2582: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2583: # Clear the \'s from around the submission
2584: for (my $i =0;$i<scalar(@$dataset);$i++) {
2585: $dataset->[$i]->[3] =~ s/(\'$|^\')//g;
2586: }
2587: return $dataset;
2588: }
2589: }
2590:
2591:
2592: sub RDs_awarddetail { return 3; }
2593: sub RDs_submission { return 2; }
2594: sub RDs_timestamp { return 1; }
2595: sub RDs_tries { return 0; }
2596: sub RDs_awarded { return 4; }
2597:
2598: sub get_response_data_by_student {
2599: my ($student,$symb,$response,$courseid) = @_;
2600: return undef if (! defined($symb) ||
2601: ! defined($response));
2602: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2603: #
2604: &setup_table_names($courseid);
2605: my $symb_id = &get_symb_id($symb);
2606: my $response_id = &get_part_id($response);
2607: #
2608: my $student_id = &get_student_id($student->{'username'},
2609: $student->{'domain'});
2610: #
2611: my $dbh = &Apache::lonmysql::get_dbh();
2612: return undef if (! defined($dbh));
2613: my $request = 'SELECT '.
2614: 'c.tries, b.timestamp, a.submission, a.awarddetail, e.awarded '.
2615: 'FROM '.$fulldump_response_table.' AS a '.
2616: 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2617: 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2618: 'a.transaction = b.transaction '.
2619: 'LEFT JOIN '.$fulldump_part_table.' AS c '.
2620: 'ON a.symb_id=c.symb_id AND a.student_id=c.student_id AND '.
2621: 'a.part_id=c.part_id AND a.transaction = c.transaction '.
2622: 'LEFT JOIN '.$student_table.' AS d '.
2623: 'ON a.student_id=d.student_id '.
2624: 'LEFT JOIN '.$performance_table.' AS e '.
2625: 'ON a.symb_id=e.symb_id AND a.part_id=e.part_id AND '.
2626: 'a.student_id=e.student_id AND c.tries=e.tries '.
2627: 'WHERE '.
2628: 'a.symb_id='.$symb_id.' AND a.response_id='.$response_id.
2629: ' AND a.student_id='.$student_id.' ORDER BY b.timestamp';
2630: # &Apache::lonnet::logthis("request =\n".$request);
2631: my $sth = $dbh->prepare($request);
2632: $sth->execute();
2633: if ($dbh->err) {
2634: &Apache::lonnet::logthis('error 4 = '.$dbh->errstr());
2635: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
2636: return undef;
2637: }
2638: my $dataset = $sth->fetchall_arrayref();
2639: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2640: # Clear the \'s from around the submission
2641: for (my $i =0;$i<scalar(@$dataset);$i++) {
2642: $dataset->[$i]->[2] =~ s/(\'$|^\')//g;
2643: }
2644: return $dataset;
2645: }
2646: return undef; # error occurred
2647: }
2648:
2649: sub RT_student_id { return 0; }
2650: sub RT_awarded { return 1; }
2651: sub RT_tries { return 2; }
2652: sub RT_timestamp { return 3; }
2653:
2654: sub get_response_time_data {
2655: my ($students,$symb,$part,$courseid) = @_;
2656: return undef if (! defined($symb) ||
2657: ! defined($part));
2658: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2659: #
2660: &setup_table_names($courseid);
2661: my $symb_id = &get_symb_id($symb);
2662: my $part_id = &get_part_id($part);
2663: #
2664: my $dbh = &Apache::lonmysql::get_dbh();
2665: return undef if (! defined($dbh));
2666: my $request = 'SELECT '.
2667: 'a.student_id, a.awarded, a.tries, b.timestamp '.
2668: 'FROM '.$fulldump_part_table.' AS a '.
2669: 'NATURAL LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2670: # 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2671: # 'a.transaction = b.transaction '.
2672: 'WHERE '.
2673: 'a.symb_id='.$symb_id.' AND a.part_id='.$part_id;
2674: if (defined($students)) {
2675: $request .= ' AND ('.
2676: join(' OR ', map {'a.student_id='.
2677: &get_student_id($_->{'username'},
2678: $_->{'domain'})
2679: } @$students
2680: ).')';
2681: }
2682: $request .= ' ORDER BY b.timestamp';
2683: # &Apache::lonnet::logthis("request =\n".$request);
2684: my $sth = $dbh->prepare($request);
2685: $sth->execute();
2686: if ($dbh->err) {
2687: &Apache::lonnet::logthis('error 5 = '.$dbh->errstr());
2688: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
2689: return undef;
2690: }
2691: my $dataset = $sth->fetchall_arrayref();
2692: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2693: return $dataset;
2694: }
2695:
2696: }
2697:
2698: ################################################
2699: ################################################
2700:
2701: =pod
2702:
2703: =item &get_student_scores($Sections,$Symbs,$enrollment,$courseid)
2704:
2705: =cut
2706:
2707: ################################################
2708: ################################################
2709: sub get_student_scores {
2710: my ($Sections,$Symbs,$enrollment,$courseid,$starttime,$endtime) = @_;
2711: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2712: &setup_table_names($courseid);
2713: my $dbh = &Apache::lonmysql::get_dbh();
2714: return (undef) if (! defined($dbh));
2715: my $tmptable = $courseid.'_temp_'.time;
2716: #
2717: my $symb_requirements;
2718: if (defined($Symbs) && @$Symbs) {
2719: $symb_requirements = '('.
2720: join(' OR ', map{ "(a.symb_id='".&get_symb_id($_->{'symb'}).
2721: "' AND a.part_id='".&get_part_id($_->{'part'}).
2722: "')"
2723: } @$Symbs).')';
2724: }
2725: #
2726: my $student_requirements;
2727: if ( (defined($Sections) && $Sections->[0] ne 'all')) {
2728: $student_requirements = '('.
2729: join(' OR ', map { "b.section='".$_."'" } @$Sections
2730: ).')';
2731: }
2732: #
2733: my $enrollment_requirements=undef;
2734: if (defined($enrollment) && $enrollment ne 'Any') {
2735: $enrollment_requirements = "b.status='".$enrollment."'";
2736: }
2737: #
2738: my $time_requirements = undef;
2739: if (defined($starttime)) {
2740: $time_requirements .= "a.timestamp>='".$starttime."'";
2741: if (defined($endtime)) {
2742: $time_requirements .= " AND a.timestamp<='".$endtime."'";
2743: }
2744: } elsif (defined($endtime)) {
2745: $time_requirements .= "a.timestamp<='".$endtime."'";
2746: }
2747: ##
2748: ##
2749: my $request = 'CREATE TEMPORARY TABLE IF NOT EXISTS '.$tmptable.
2750: ' SELECT a.student_id,SUM(a.awarded) AS score FROM '.
2751: $performance_table.' AS a ';
2752: if (defined($student_requirements) || defined($enrollment_requirements)) {
2753: $request .= ' NATURAL LEFT JOIN '.$student_table.' AS b ';
2754: }
2755: if (defined($symb_requirements) ||
2756: defined($student_requirements) ||
2757: defined($enrollment_requirements) ) {
2758: $request .= ' WHERE ';
2759: }
2760: if (defined($symb_requirements)) {
2761: $request .= $symb_requirements.' AND ';
2762: }
2763: if (defined($student_requirements)) {
2764: $request .= $student_requirements.' AND ';
2765: }
2766: if (defined($enrollment_requirements)) {
2767: $request .= $enrollment_requirements.' AND ';
2768: }
2769: if (defined($time_requirements)) {
2770: $request .= $time_requirements.' AND ';
2771: }
2772: $request =~ s/ AND $//; # Strip of the trailing ' AND '.
2773: $request .= ' GROUP BY a.student_id';
2774: # &Apache::lonnet::logthis("request = \n".$request);
2775: my $sth = $dbh->prepare($request);
2776: $sth->execute();
2777: if ($dbh->err) {
2778: &Apache::lonnet::logthis('error 6 = '.$dbh->errstr());
2779: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
2780: return undef;
2781: }
2782: $request = 'SELECT score,COUNT(*) FROM '.$tmptable.' GROUP BY score';
2783: # &Apache::lonnet::logthis("request = \n".$request);
2784: $sth = $dbh->prepare($request);
2785: $sth->execute();
2786: if ($dbh->err) {
2787: &Apache::lonnet::logthis('error 7 = '.$dbh->errstr());
2788: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
2789: return undef;
2790: }
2791: my $dataset = $sth->fetchall_arrayref();
2792: return $dataset;
2793: }
2794:
2795: ################################################
2796: ################################################
2797:
2798: =pod
2799:
2800: =item &setup_table_names()
2801:
2802: input: course id
2803:
2804: output: none
2805:
2806: Cleans up the package variables for local caching.
2807:
2808: =cut
2809:
2810: ################################################
2811: ################################################
2812: sub setup_table_names {
2813: my ($courseid) = @_;
2814: if (! defined($courseid)) {
2815: $courseid = $ENV{'request.course.id'};
2816: }
2817: #
2818: if (! defined($current_course) || $current_course ne $courseid) {
2819: # Clear out variables
2820: $have_read_part_table = 0;
2821: undef(%ids_by_part);
2822: undef(%parts_by_id);
2823: $have_read_symb_table = 0;
2824: undef(%ids_by_symb);
2825: undef(%symbs_by_id);
2826: $have_read_student_table = 0;
2827: undef(%ids_by_student);
2828: undef(%students_by_id);
2829: #
2830: $current_course = $courseid;
2831: }
2832: #
2833: # Set up database names
2834: my $base_id = $courseid;
2835: $symb_table = $base_id.'_'.'symb';
2836: $part_table = $base_id.'_'.'part';
2837: $student_table = $base_id.'_'.'student';
2838: $performance_table = $base_id.'_'.'performance';
2839: $parameters_table = $base_id.'_'.'parameters';
2840: $fulldump_part_table = $base_id.'_'.'partdata';
2841: $fulldump_response_table = $base_id.'_'.'responsedata';
2842: $fulldump_timestamp_table = $base_id.'_'.'timestampdata';
2843: $weight_table = $base_id.'_'.'weight';
2844: #
2845: @Tables = (
2846: $symb_table,
2847: $part_table,
2848: $student_table,
2849: $performance_table,
2850: $parameters_table,
2851: $fulldump_part_table,
2852: $fulldump_response_table,
2853: $fulldump_timestamp_table,
2854: $weight_table,
2855: );
2856: return;
2857: }
2858:
2859: ################################################
2860: ################################################
2861:
2862: =pod
2863:
2864: =back
2865:
2866: =item End of Local Data Caching Subroutines
2867:
2868: =cut
2869:
2870: ################################################
2871: ################################################
2872:
2873: } # End scope of table identifiers
2874:
2875: ################################################
2876: ################################################
2877:
2878: =pod
2879:
2880: =head3 Classlist Subroutines
2881:
2882: =item &get_classlist();
2883:
2884: Retrieve the classist of a given class or of the current class. Student
2885: information is returned from the classlist.db file and, if needed,
2886: from the students environment.
2887:
2888: Optional arguments are $cid, $cdom, and $cnum (course id, course domain,
2889: and course number, respectively). Any omitted arguments will be taken
2890: from the current environment ($ENV{'request.course.id'},
2891: $ENV{'course.'.$cid.'.domain'}, and $ENV{'course.'.$cid.'.num'}).
2892:
2893: Returns a reference to a hash which contains:
2894: keys '$sname:$sdom'
2895: values [$sdom,$sname,$end,$start,$id,$section,$fullname,$status,$type,$lockedtype]
2896:
2897: The constant values CL_SDOM, CL_SNAME, CL_END, etc. can be used
2898: as indices into the returned list to future-proof clients against
2899: changes in the list order.
2900:
2901: =cut
2902:
2903: ################################################
2904: ################################################
2905:
2906: sub CL_SDOM { return 0; }
2907: sub CL_SNAME { return 1; }
2908: sub CL_END { return 2; }
2909: sub CL_START { return 3; }
2910: sub CL_ID { return 4; }
2911: sub CL_SECTION { return 5; }
2912: sub CL_FULLNAME { return 6; }
2913: sub CL_STATUS { return 7; }
2914: sub CL_TYPE { return 8; }
2915: sub CL_LOCKEDTYPE { return 9; }
2916:
2917: sub get_classlist {
2918: my ($cid,$cdom,$cnum) = @_;
2919: $cid = $cid || $ENV{'request.course.id'};
2920: $cdom = $cdom || $ENV{'course.'.$cid.'.domain'};
2921: $cnum = $cnum || $ENV{'course.'.$cid.'.num'};
2922: my $now = time;
2923: #
2924: my %classlist=&Apache::lonnet::dump('classlist',$cdom,$cnum);
2925: while (my ($student,$info) = each(%classlist)) {
2926: if ($student =~ /^(con_lost|error|no_such_host)/i) {
2927: &Apache::lonnet::logthis('get_classlist error for '.$cid.':'.$student);
2928: return undef;
2929: }
2930: my ($sname,$sdom) = split(/:/,$student);
2931: my @Values = split(/:/,$info);
2932: my ($end,$start,$id,$section,$fullname,$type,$lockedtype);
2933: if (@Values > 2) {
2934: ($end,$start,$id,$section,$fullname,$type,$lockedtype) = @Values;
2935: } else { # We have to get the data ourselves
2936: ($end,$start) = @Values;
2937: $section = &Apache::lonnet::getsection($sdom,$sname,$cid);
2938: my %info=&Apache::lonnet::get('environment',
2939: ['firstname','middlename',
2940: 'lastname','generation','id'],
2941: $sdom, $sname);
2942: my ($tmp) = keys(%info);
2943: if ($tmp =~/^(con_lost|error|no_such_host)/i) {
2944: $fullname = 'not available';
2945: $id = 'not available';
2946: &Apache::lonnet::logthis('unable to retrieve environment '.
2947: 'for '.$sname.':'.$sdom);
2948: } else {
2949: $fullname = &ProcessFullName(@info{qw/lastname generation
2950: firstname middlename/});
2951: $id = $info{'id'};
2952: }
2953: # Update the classlist with this students information
2954: if ($fullname ne 'not available') {
2955: my $enrolldata = join(':',$end,$start,$id,$section,$fullname);
2956: my $reply=&Apache::lonnet::cput('classlist',
2957: {$student => $enrolldata},
2958: $cdom,$cnum);
2959: if ($reply !~ /^(ok|delayed)/) {
2960: &Apache::lonnet::logthis('Unable to update classlist for '.
2961: 'student '.$sname.':'.$sdom.
2962: ' error:'.$reply);
2963: }
2964: }
2965: }
2966: my $status='Expired';
2967: if(((!$end) || $now < $end) && ((!$start) || ($now > $start))) {
2968: $status='Active';
2969: }
2970: $classlist{$student} =
2971: [$sdom,$sname,$end,$start,$id,$section,$fullname,$status,$type,$lockedtype];
2972: }
2973: if (wantarray()) {
2974: return (\%classlist,['domain','username','end','start','id',
2975: 'section','fullname','status','type','lockedtype']);
2976: } else {
2977: return \%classlist;
2978: }
2979: }
2980:
2981: # ----- END HELPER FUNCTIONS --------------------------------------------
2982:
2983: 1;
2984: __END__
2985:
2986:
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