1: # The LearningOnline Network with CAPA
2: #
3: # $Id: loncoursedata.pm,v 1.132 2004/04/30 14:36:52 matthew Exp $
4: #
5: # Copyright Michigan State University Board of Trustees
6: #
7: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
8: #
9: # LON-CAPA is free software; you can redistribute it and/or modify
10: # it under the terms of the GNU General Public License as published by
11: # the Free Software Foundation; either version 2 of the License, or
12: # (at your option) any later version.
13: #
14: # LON-CAPA is distributed in the hope that it will be useful,
15: # but WITHOUT ANY WARRANTY; without even the implied warranty of
16: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17: # GNU General Public License for more details.
18: #
19: # You should have received a copy of the GNU General Public License
20: # along with LON-CAPA; if not, write to the Free Software
21: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22: #
23: # /home/httpd/html/adm/gpl.txt
24: #
25: # http://www.lon-capa.org/
26: #
27: ###
28:
29: =pod
30:
31: =head1 NAME
32:
33: loncoursedata
34:
35: =head1 SYNOPSIS
36:
37: Set of functions that download and process student and course information.
38:
39: =head1 PACKAGES USED
40:
41: Apache::Constants qw(:common :http)
42: Apache::lonnet()
43: Apache::lonhtmlcommon
44: HTML::TokeParser
45: GDBM_File
46:
47: =cut
48:
49: package Apache::loncoursedata;
50:
51: use strict;
52: use Apache::Constants qw(:common :http);
53: use Apache::lonnet();
54: use Apache::lonhtmlcommon;
55: use Time::HiRes;
56: use Apache::lonmysql;
57: use HTML::TokeParser;
58: use GDBM_File;
59:
60: =pod
61:
62: =head1 DOWNLOAD INFORMATION
63:
64: This section contains all the functions that get data from other servers
65: and/or itself.
66:
67: =cut
68:
69: ####################################################
70: ####################################################
71:
72: =pod
73:
74: =item &get_sequence_assessment_data()
75:
76: 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->title();
159: $title =~ s/\:/\&\#058;/g;
160: $symb = $previous->symb();
161: $src = $previous->src();
162: # pick up the filename if there is no title available
163: if (! defined($title) || $title eq '') {
164: ($title) = ($src=~/\/([^\/]*)$/);
165: }
166: $randompick = $previous->randompick();
167: my $newmap = { title => $title,
168: src => $src,
169: symb => $symb,
170: type => 'container',
171: num_assess => 0,
172: randompick => $randompick,
173: contents => [],
174: };
175: push (@{$currentmap->{'contents'}},$newmap); # this is permanent
176: push (@Sequences,$newmap);
177: push (@Nested_Sequences, $newmap); # this is a stack
178: next;
179: }
180: if ($curRes == $iterator->END_MAP()) {
181: pop(@Nested_Sequences);
182: next;
183: }
184: next if (! ref($curRes));
185: next if (! $curRes->is_problem() && $curRes->src() !~ /\.survey$/);
186: # Okay, from here on out we only deal with assessments
187: $title = $curRes->title();
188: $title =~ s/\:/\&\#058;/g;
189: $symb = $curRes->symb();
190: $src = $curRes->src();
191: # Grab the filename if there is not title available
192: if (! defined($title) || $title eq '') {
193: ($title) = ($src=~ m:/([^/]*)$:);
194: }
195: my $parts = $curRes->parts();
196: my %partdata;
197: foreach my $part (@$parts) {
198: my @Responses = $curRes->responseType($part);
199: my @Ids = $curRes->responseIds($part);
200: $partdata{$part}->{'ResponseTypes'}= \@Responses;
201: $partdata{$part}->{'ResponseIds'} = \@Ids;
202: # Count how many responses of each type there are in this part
203: foreach (@Responses) {
204: $partdata{$part}->{$_}++;
205: }
206: }
207: my $assessment = { title => $title,
208: src => $src,
209: symb => $symb,
210: type => 'assessment',
211: parts => $parts,
212: num_parts => scalar(@$parts),
213: partdata => \%partdata,
214: };
215: push(@Assessments,$assessment);
216: push(@{$currentmap->{'contents'}},$assessment);
217: $currentmap->{'num_assess'}++;
218: $currentmap->{'num_assess_parts'}+= scalar(@$parts);
219: }
220: $navmap->untieHashes();
221: return ($top,\@Sequences,\@Assessments);
222: }
223:
224: sub LoadDiscussion {
225: my ($courseID)=@_;
226: my %Discuss=();
227: my %contrib=&Apache::lonnet::dump(
228: $courseID,
229: $ENV{'course.'.$courseID.'.domain'},
230: $ENV{'course.'.$courseID.'.num'});
231:
232: #my %contrib=&DownloadCourseInformation($name, $courseID, 0);
233:
234: foreach my $temp(keys %contrib) {
235: if ($temp=~/^version/) {
236: my $ver=$contrib{$temp};
237: my ($dummy,$prb)=split(':',$temp);
238: for (my $idx=1; $idx<=$ver; $idx++ ) {
239: my $name=$contrib{"$idx:$prb:sendername"};
240: $Discuss{"$name:$prb"}=$idx;
241: }
242: }
243: }
244:
245: return \%Discuss;
246: }
247:
248: ################################################
249: ################################################
250:
251: =pod
252:
253: =item &GetUserName(username,userdomain)
254:
255: Returns a hash with the following entries:
256: 'firstname', 'middlename', 'lastname', 'generation', and 'fullname'
257:
258: 'fullname' is the result of &Apache::loncoursedata::ProcessFullName.
259:
260: =cut
261:
262: ################################################
263: ################################################
264: sub GetUserName {
265: my ($username,$userdomain) = @_;
266: $username = $ENV{'user.name'} if (! defined($username));
267: $userdomain = $ENV{'user.domain'} if (! defined($username));
268: my %userenv = &Apache::lonnet::get('environment',
269: ['firstname','middlename','lastname','generation'],
270: $userdomain,$username);
271: $userenv{'fullname'} = &ProcessFullName($userenv{'lastname'},
272: $userenv{'generation'},
273: $userenv{'firstname'},
274: $userenv{'middlename'});
275: return %userenv;
276: }
277:
278: ################################################
279: ################################################
280:
281: =pod
282:
283: =item &ProcessFullName()
284:
285: Takes lastname, generation, firstname, and middlename (or some partial
286: set of this data) and returns the full name version as a string. Format
287: is Lastname generation, firstname middlename or a subset of this.
288:
289: =cut
290:
291: ################################################
292: ################################################
293: sub ProcessFullName {
294: my ($lastname, $generation, $firstname, $middlename)=@_;
295: my $Str = '';
296:
297: # Strip whitespace preceeding & following name components.
298: $lastname =~ s/(\s+$|^\s+)//g;
299: $generation =~ s/(\s+$|^\s+)//g;
300: $firstname =~ s/(\s+$|^\s+)//g;
301: $middlename =~ s/(\s+$|^\s+)//g;
302:
303: if($lastname ne '') {
304: $Str .= $lastname;
305: $Str .= ' '.$generation if ($generation ne '');
306: $Str .= ',';
307: $Str .= ' '.$firstname if ($firstname ne '');
308: $Str .= ' '.$middlename if ($middlename ne '');
309: } else {
310: $Str .= $firstname if ($firstname ne '');
311: $Str .= ' '.$middlename if ($middlename ne '');
312: $Str .= ' '.$generation if ($generation ne '');
313: }
314:
315: return $Str;
316: }
317:
318: ################################################
319: ################################################
320:
321: =pod
322:
323: =item &make_into_hash($values);
324:
325: Returns a reference to a hash as described by $values. $values is
326: assumed to be the result of
327: join(':',map {&Apache::lonnet::escape($_)} %orighash);
328:
329: This is a helper function for get_current_state.
330:
331: =cut
332:
333: ################################################
334: ################################################
335: sub make_into_hash {
336: my $values = shift;
337: my %tmp = map { &Apache::lonnet::unescape($_); }
338: split(':',$values);
339: return \%tmp;
340: }
341:
342:
343: ################################################
344: ################################################
345:
346: =pod
347:
348: =head1 LOCAL DATA CACHING SUBROUTINES
349:
350: The local caching is done using MySQL. There is no fall-back implementation
351: if MySQL is not running.
352:
353: The programmers interface is to call &get_current_state() or some other
354: primary interface subroutine (described below). The internals of this
355: storage system are documented here.
356:
357: There are six tables used to store student performance data (the results of
358: a dumpcurrent). Each of these tables is created in MySQL with a name of
359: $courseid_*****, where ***** is 'symb', 'part', or whatever is appropriate
360: for the table. The tables and their purposes are described below.
361:
362: Some notes before we get started.
363:
364: Each table must have a PRIMARY KEY, which is a column or set of columns which
365: will serve to uniquely identify a row of data. NULL is not allowed!
366:
367: INDEXes work best on integer data.
368:
369: JOIN is used to combine data from many tables into one output.
370:
371: lonmysql.pm is used for some of the interface, specifically the table creation
372: calls. The inserts are done in bulk by directly calling the database handler.
373: The SELECT ... JOIN statement used to retrieve the data does not have an
374: interface in lonmysql.pm and I shudder at the thought of writing one.
375:
376: =head3 Table Descriptions
377:
378: =over 4
379:
380: =item Tables used to store meta information
381:
382: The following tables hold data required to keep track of the current status
383: of a students data in the tables or to look up the students data in the tables.
384:
385: =over 4
386:
387: =item $symb_table
388:
389: The symb_table has two columns. The first is a 'symb_id' and the second
390: is the text name for the 'symb' (limited to 64k). The 'symb_id' is generated
391: automatically by MySQL so inserts should be done on this table with an
392: empty first element. This table has its PRIMARY KEY on the 'symb_id'.
393:
394: =item $part_table
395:
396: The part_table has two columns. The first is a 'part_id' and the second
397: is the text name for the 'part' (limited to 100 characters). The 'part_id' is
398: generated automatically by MySQL so inserts should be done on this table with
399: an empty first element. This table has its PRIMARY KEY on the 'part' (100
400: characters) and a KEY on 'part_id'.
401:
402: =item $student_table
403:
404: The student_table has 7 columns. The first is a 'student_id' assigned by
405: MySQL. The second is 'student' which is username:domain. The third through
406: fifth are 'section', 'status' (enrollment status), and 'classification'
407: (to be used in the future). The sixth and seventh ('updatetime' and
408: 'fullupdatetime') contain the time of last update and full update of student
409: data. This table has its PRIMARY KEY on the 'student_id' column and is indexed
410: on 'student', 'section', and 'status'.
411:
412: =back
413:
414: =item Tables used to store current status data
415:
416: The following tables store data only about the students current status on
417: a problem, meaning only the data related to the last attempt on a problem.
418:
419: =over 4
420:
421: =item $performance_table
422:
423: The performance_table has 9 columns. The first three are 'symb_id',
424: 'student_id', and 'part_id'. These comprise the PRIMARY KEY for this table
425: and are directly related to the $symb_table, $student_table, and $part_table
426: described above. MySQL does better indexing on numeric items than text,
427: so we use these three "index tables". The remaining columns are
428: 'solved', 'tries', 'awarded', 'award', 'awarddetail', and 'timestamp'.
429: These are either the MySQL type TINYTEXT or various integers ('tries' and
430: 'timestamp'). This table has KEYs of 'student_id' and 'symb_id'.
431: For use of this table, see the functions described below.
432:
433: =item $parameters_table
434:
435: The parameters_table holds the data that does not fit neatly into the
436: performance_table. The parameters table has four columns: 'symb_id',
437: 'student_id', 'parameter', and 'value'. 'symb_id', 'student_id', and
438: 'parameter' comprise the PRIMARY KEY for this table. 'parameter' is
439: limited to 255 characters. 'value' is limited to 64k characters.
440:
441: =back
442:
443: =item Tables used for storing historic data
444:
445: The following tables are used to store almost all of the transactions a student
446: has made on a homework problem. See loncapa/docs/homework/datastorage for
447: specific information about each of the parameters stored.
448:
449: =over 4
450:
451: =item $fulldump_response_table
452:
453: The response table holds data (documented in loncapa/docs/homework/datastorage)
454: associated with a particular response id which is stored when a student
455: attempts a problem. The following are the columns of the table, in order:
456: 'symb_id','part_id','response_id','student_id','transaction','tries',
457: 'awarddetail', 'response_specific' (data particular to the response
458: type), 'response_specific_value', and 'submission (the text of the students
459: submission). The primary key is based on the first five columns listed above.
460:
461: =item $fulldump_part_table
462:
463: The part table holds data (documented in loncapa/docs/homework/datastorage)
464: associated with a particular part id which is stored when a student attempts
465: a problem. The following are the columns of the table, in order:
466: 'symb_id','part_id','student_id','transaction','tries','award','awarded',
467: and 'previous'. The primary key is based on the first five columns listed
468: above.
469:
470: =item $fulldump_timestamp_table
471:
472: The timestamp table holds the timestamps of the transactions which are
473: stored in $fulldump_response_table and $fulldump_part_table. This data is
474: about both the response and part data. Columns: 'symb_id','student_id',
475: 'transaction', and 'timestamp'.
476: The primary key is based on the first 3 columns.
477:
478: =item $weight_table
479:
480: The weight table holds the weight for the problems used in the class.
481: Whereas the weight of a problem can vary by section and student the data
482: here is applied to the class as a whole.
483: Columns: 'symb_id','part_id','response_id','weight'.
484:
485: =back
486:
487: =back
488:
489: =head3 Important Subroutines
490:
491: Here is a brief overview of the subroutines which are likely to be of
492: interest:
493:
494: =over 4
495:
496: =item &get_current_state(): programmers interface.
497:
498: =item &init_dbs(): table creation
499:
500: =item &update_student_data(): data storage calls
501:
502: =item &get_student_data_from_performance_cache(): data retrieval
503:
504: =back
505:
506: =head3 Main Documentation
507:
508: =over 4
509:
510: =cut
511:
512: ################################################
513: ################################################
514:
515: ################################################
516: ################################################
517: { # Begin scope of table identifiers
518:
519: my $current_course ='';
520: my $symb_table;
521: my $part_table;
522: my $student_table;
523: my $performance_table;
524: my $parameters_table;
525: my $fulldump_response_table;
526: my $fulldump_part_table;
527: my $fulldump_timestamp_table;
528: my $weight_table;
529:
530: my @Tables;
531: ################################################
532: ################################################
533:
534: =pod
535:
536: =item &init_dbs()
537:
538: Input: course id
539:
540: Output: 0 on success, positive integer on error
541:
542: This routine issues the calls to lonmysql to create the tables used to
543: store student data.
544:
545: =cut
546:
547: ################################################
548: ################################################
549: sub init_dbs {
550: my $courseid = shift;
551: &setup_table_names($courseid);
552: #
553: # Drop any of the existing tables
554: foreach my $table (@Tables) {
555: &Apache::lonmysql::drop_table($table);
556: }
557: #
558: # Note - changes to this table must be reflected in the code that
559: # stores the data (calls &Apache::lonmysql::store_row with this table
560: # id
561: my $symb_table_def = {
562: id => $symb_table,
563: permanent => 'no',
564: columns => [{ name => 'symb_id',
565: type => 'MEDIUMINT UNSIGNED',
566: restrictions => 'NOT NULL',
567: auto_inc => 'yes', },
568: { name => 'symb',
569: type => 'MEDIUMTEXT',
570: restrictions => 'NOT NULL'},
571: ],
572: 'PRIMARY KEY' => ['symb_id'],
573: };
574: #
575: my $part_table_def = {
576: id => $part_table,
577: permanent => 'no',
578: columns => [{ name => 'part_id',
579: type => 'MEDIUMINT UNSIGNED',
580: restrictions => 'NOT NULL',
581: auto_inc => 'yes', },
582: { name => 'part',
583: type => 'VARCHAR(100) BINARY',
584: restrictions => 'NOT NULL'},
585: ],
586: 'PRIMARY KEY' => ['part (100)'],
587: 'KEY' => [{ columns => ['part_id']},],
588: };
589: #
590: my $student_table_def = {
591: id => $student_table,
592: permanent => 'no',
593: columns => [{ name => 'student_id',
594: type => 'MEDIUMINT UNSIGNED',
595: restrictions => 'NOT NULL',
596: auto_inc => 'yes', },
597: { name => 'student',
598: type => 'VARCHAR(100) BINARY',
599: restrictions => 'NOT NULL UNIQUE'},
600: { name => 'section',
601: type => 'VARCHAR(100) BINARY',
602: restrictions => 'NOT NULL'},
603: { name => 'status',
604: type => 'VARCHAR(15) BINARY',
605: restrictions => 'NOT NULL'},
606: { name => 'classification',
607: type => 'VARCHAR(100) BINARY', },
608: { name => 'updatetime',
609: type => 'INT UNSIGNED'},
610: { name => 'fullupdatetime',
611: type => 'INT UNSIGNED'},
612: ],
613: 'PRIMARY KEY' => ['student_id'],
614: 'KEY' => [{ columns => ['student (100)',
615: 'section (100)',
616: 'status (15)',]},],
617: };
618: #
619: my $performance_table_def = {
620: id => $performance_table,
621: permanent => 'no',
622: columns => [{ name => 'symb_id',
623: type => 'MEDIUMINT UNSIGNED',
624: restrictions => 'NOT NULL' },
625: { name => 'student_id',
626: type => 'MEDIUMINT UNSIGNED',
627: restrictions => 'NOT NULL' },
628: { name => 'part_id',
629: type => 'MEDIUMINT UNSIGNED',
630: restrictions => 'NOT NULL' },
631: { name => 'part',
632: type => 'VARCHAR(100) BINARY',
633: restrictions => 'NOT NULL'},
634: { name => 'solved',
635: type => 'TINYTEXT' },
636: { name => 'tries',
637: type => 'SMALLINT UNSIGNED' },
638: { name => 'awarded',
639: type => 'REAL' },
640: { name => 'award',
641: type => 'TINYTEXT' },
642: { name => 'awarddetail',
643: type => 'TINYTEXT' },
644: { name => 'timestamp',
645: type => 'INT UNSIGNED'},
646: ],
647: 'PRIMARY KEY' => ['symb_id','student_id','part_id'],
648: 'KEY' => [{ columns=>['student_id'] },
649: { columns=>['symb_id'] },],
650: };
651: #
652: my $fulldump_part_table_def = {
653: id => $fulldump_part_table,
654: permanent => 'no',
655: columns => [
656: { name => 'symb_id',
657: type => 'MEDIUMINT UNSIGNED',
658: restrictions => 'NOT NULL' },
659: { name => 'part_id',
660: type => 'MEDIUMINT UNSIGNED',
661: restrictions => 'NOT NULL' },
662: { name => 'student_id',
663: type => 'MEDIUMINT UNSIGNED',
664: restrictions => 'NOT NULL' },
665: { name => 'transaction',
666: type => 'MEDIUMINT UNSIGNED',
667: restrictions => 'NOT NULL' },
668: { name => 'tries',
669: type => 'SMALLINT UNSIGNED',
670: restrictions => 'NOT NULL' },
671: { name => 'award',
672: type => 'TINYTEXT' },
673: { name => 'awarded',
674: type => 'REAL' },
675: { name => 'previous',
676: type => 'SMALLINT UNSIGNED' },
677: # { name => 'regrader',
678: # type => 'TINYTEXT' },
679: # { name => 'afterduedate',
680: # type => 'TINYTEXT' },
681: ],
682: 'PRIMARY KEY' => ['symb_id','part_id','student_id','transaction'],
683: 'KEY' => [
684: { columns=>['symb_id'] },
685: { columns=>['part_id'] },
686: { columns=>['student_id'] },
687: ],
688: };
689: #
690: my $fulldump_response_table_def = {
691: id => $fulldump_response_table,
692: permanent => 'no',
693: columns => [
694: { name => 'symb_id',
695: type => 'MEDIUMINT UNSIGNED',
696: restrictions => 'NOT NULL' },
697: { name => 'part_id',
698: type => 'MEDIUMINT UNSIGNED',
699: restrictions => 'NOT NULL' },
700: { name => 'response_id',
701: type => 'MEDIUMINT UNSIGNED',
702: restrictions => 'NOT NULL' },
703: { name => 'student_id',
704: type => 'MEDIUMINT UNSIGNED',
705: restrictions => 'NOT NULL' },
706: { name => 'transaction',
707: type => 'MEDIUMINT UNSIGNED',
708: restrictions => 'NOT NULL' },
709: { name => 'awarddetail',
710: type => 'TINYTEXT' },
711: # { name => 'message',
712: # type => 'CHAR BINARY'},
713: { name => 'response_specific',
714: type => 'TINYTEXT' },
715: { name => 'response_specific_value',
716: type => 'TINYTEXT' },
717: { name => 'submission',
718: type => 'TEXT'},
719: ],
720: 'PRIMARY KEY' => ['symb_id','part_id','response_id','student_id',
721: 'transaction'],
722: 'KEY' => [
723: { columns=>['symb_id'] },
724: { columns=>['part_id','response_id'] },
725: { columns=>['student_id'] },
726: ],
727: };
728: my $fulldump_timestamp_table_def = {
729: id => $fulldump_timestamp_table,
730: permanent => 'no',
731: columns => [
732: { name => 'symb_id',
733: type => 'MEDIUMINT UNSIGNED',
734: restrictions => 'NOT NULL' },
735: { name => 'student_id',
736: type => 'MEDIUMINT UNSIGNED',
737: restrictions => 'NOT NULL' },
738: { name => 'transaction',
739: type => 'MEDIUMINT UNSIGNED',
740: restrictions => 'NOT NULL' },
741: { name => 'timestamp',
742: type => 'INT UNSIGNED'},
743: ],
744: 'PRIMARY KEY' => ['symb_id','student_id','transaction'],
745: 'KEY' => [
746: { columns=>['symb_id'] },
747: { columns=>['student_id'] },
748: { columns=>['transaction'] },
749: ],
750: };
751: #
752: my $parameters_table_def = {
753: id => $parameters_table,
754: permanent => 'no',
755: columns => [{ name => 'symb_id',
756: type => 'MEDIUMINT UNSIGNED',
757: restrictions => 'NOT NULL' },
758: { name => 'student_id',
759: type => 'MEDIUMINT UNSIGNED',
760: restrictions => 'NOT NULL' },
761: { name => 'parameter',
762: type => 'TINYTEXT',
763: restrictions => 'NOT NULL' },
764: { name => 'value',
765: type => 'MEDIUMTEXT' },
766: ],
767: 'PRIMARY KEY' => ['symb_id','student_id','parameter (255)'],
768: };
769: #
770: my $weight_table_def = {
771: id => $weight_table,
772: permanent => 'no',
773: columns => [{ name => 'symb_id',
774: type => 'MEDIUMINT UNSIGNED',
775: restrictions => 'NOT NULL' },
776: { name => 'part_id',
777: type => 'MEDIUMINT UNSIGNED',
778: restrictions => 'NOT NULL' },
779: { name => 'weight',
780: type => 'REAL',
781: restrictions => 'NOT NULL' },
782: ],
783: 'PRIMARY KEY' => ['symb_id','part_id'],
784: };
785: #
786: # Create the tables
787: my $tableid;
788: $tableid = &Apache::lonmysql::create_table($symb_table_def);
789: if (! defined($tableid)) {
790: &Apache::lonnet::logthis("error creating symb_table: ".
791: &Apache::lonmysql::get_error());
792: return 1;
793: }
794: #
795: $tableid = &Apache::lonmysql::create_table($part_table_def);
796: if (! defined($tableid)) {
797: &Apache::lonnet::logthis("error creating part_table: ".
798: &Apache::lonmysql::get_error());
799: return 2;
800: }
801: #
802: $tableid = &Apache::lonmysql::create_table($student_table_def);
803: if (! defined($tableid)) {
804: &Apache::lonnet::logthis("error creating student_table: ".
805: &Apache::lonmysql::get_error());
806: return 3;
807: }
808: #
809: $tableid = &Apache::lonmysql::create_table($performance_table_def);
810: if (! defined($tableid)) {
811: &Apache::lonnet::logthis("error creating preformance_table: ".
812: &Apache::lonmysql::get_error());
813: return 5;
814: }
815: #
816: $tableid = &Apache::lonmysql::create_table($parameters_table_def);
817: if (! defined($tableid)) {
818: &Apache::lonnet::logthis("error creating parameters_table: ".
819: &Apache::lonmysql::get_error());
820: return 6;
821: }
822: #
823: $tableid = &Apache::lonmysql::create_table($fulldump_part_table_def);
824: if (! defined($tableid)) {
825: &Apache::lonnet::logthis("error creating fulldump_part_table: ".
826: &Apache::lonmysql::get_error());
827: return 7;
828: }
829: #
830: $tableid = &Apache::lonmysql::create_table($fulldump_response_table_def);
831: if (! defined($tableid)) {
832: &Apache::lonnet::logthis("error creating fulldump_response_table: ".
833: &Apache::lonmysql::get_error());
834: return 8;
835: }
836: $tableid = &Apache::lonmysql::create_table($fulldump_timestamp_table_def);
837: if (! defined($tableid)) {
838: &Apache::lonnet::logthis("error creating fulldump_timestamp_table: ".
839: &Apache::lonmysql::get_error());
840: return 9;
841: }
842: $tableid = &Apache::lonmysql::create_table($weight_table_def);
843: if (! defined($tableid)) {
844: &Apache::lonnet::logthis("error creating weight_table: ".
845: &Apache::lonmysql::get_error());
846: return 10;
847: }
848: return 0;
849: }
850:
851: ################################################
852: ################################################
853:
854: =pod
855:
856: =item &delete_caches()
857:
858: =cut
859:
860: ################################################
861: ################################################
862: sub delete_caches {
863: my $courseid = shift;
864: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
865: #
866: &setup_table_names($courseid);
867: #
868: my $dbh = &Apache::lonmysql::get_dbh();
869: foreach my $table (@Tables) {
870: my $command = 'DROP TABLE '.$table.';';
871: $dbh->do($command);
872: if ($dbh->err) {
873: &Apache::lonnet::logthis($command.' resulted in error: '.$dbh->errstr);
874: }
875: }
876: return;
877: }
878:
879: ################################################
880: ################################################
881:
882: =pod
883:
884: =item &get_part_id()
885:
886: Get the MySQL id of a problem part string.
887:
888: Input: $part
889:
890: Output: undef on error, integer $part_id on success.
891:
892: =item &get_part()
893:
894: Get the string describing a part from the MySQL id of the problem part.
895:
896: Input: $part_id
897:
898: Output: undef on error, $part string on success.
899:
900: =cut
901:
902: ################################################
903: ################################################
904:
905: my $have_read_part_table = 0;
906: my %ids_by_part;
907: my %parts_by_id;
908:
909: sub get_part_id {
910: my ($part) = @_;
911: $part = 0 if (! defined($part));
912: if (! $have_read_part_table) {
913: my @Result = &Apache::lonmysql::get_rows($part_table);
914: foreach (@Result) {
915: $ids_by_part{$_->[1]}=$_->[0];
916: }
917: $have_read_part_table = 1;
918: }
919: if (! exists($ids_by_part{$part})) {
920: &Apache::lonmysql::store_row($part_table,[undef,$part]);
921: undef(%ids_by_part);
922: my @Result = &Apache::lonmysql::get_rows($part_table);
923: foreach (@Result) {
924: $ids_by_part{$_->[1]}=$_->[0];
925: }
926: }
927: return $ids_by_part{$part} if (exists($ids_by_part{$part}));
928: return undef; # error
929: }
930:
931: sub get_part {
932: my ($part_id) = @_;
933: if (! exists($parts_by_id{$part_id}) ||
934: ! defined($parts_by_id{$part_id}) ||
935: $parts_by_id{$part_id} eq '') {
936: my @Result = &Apache::lonmysql::get_rows($part_table);
937: foreach (@Result) {
938: $parts_by_id{$_->[0]}=$_->[1];
939: }
940: }
941: return $parts_by_id{$part_id} if(exists($parts_by_id{$part_id}));
942: return undef; # error
943: }
944:
945: ################################################
946: ################################################
947:
948: =pod
949:
950: =item &get_symb_id()
951:
952: Get the MySQL id of a symb.
953:
954: Input: $symb
955:
956: Output: undef on error, integer $symb_id on success.
957:
958: =item &get_symb()
959:
960: Get the symb associated with a MySQL symb_id.
961:
962: Input: $symb_id
963:
964: Output: undef on error, $symb on success.
965:
966: =cut
967:
968: ################################################
969: ################################################
970:
971: my $have_read_symb_table = 0;
972: my %ids_by_symb;
973: my %symbs_by_id;
974:
975: sub get_symb_id {
976: my ($symb) = @_;
977: if (! $have_read_symb_table) {
978: my @Result = &Apache::lonmysql::get_rows($symb_table);
979: foreach (@Result) {
980: $ids_by_symb{$_->[1]}=$_->[0];
981: }
982: $have_read_symb_table = 1;
983: }
984: if (! exists($ids_by_symb{$symb})) {
985: &Apache::lonmysql::store_row($symb_table,[undef,$symb]);
986: undef(%ids_by_symb);
987: my @Result = &Apache::lonmysql::get_rows($symb_table);
988: foreach (@Result) {
989: $ids_by_symb{$_->[1]}=$_->[0];
990: }
991: }
992: return $ids_by_symb{$symb} if(exists( $ids_by_symb{$symb}));
993: return undef; # error
994: }
995:
996: sub get_symb {
997: my ($symb_id) = @_;
998: if (! exists($symbs_by_id{$symb_id}) ||
999: ! defined($symbs_by_id{$symb_id}) ||
1000: $symbs_by_id{$symb_id} eq '') {
1001: my @Result = &Apache::lonmysql::get_rows($symb_table);
1002: foreach (@Result) {
1003: $symbs_by_id{$_->[0]}=$_->[1];
1004: }
1005: }
1006: return $symbs_by_id{$symb_id} if(exists( $symbs_by_id{$symb_id}));
1007: return undef; # error
1008: }
1009:
1010: ################################################
1011: ################################################
1012:
1013: =pod
1014:
1015: =item &get_student_id()
1016:
1017: Get the MySQL id of a student.
1018:
1019: Input: $sname, $dom
1020:
1021: Output: undef on error, integer $student_id on success.
1022:
1023: =item &get_student()
1024:
1025: Get student username:domain associated with the MySQL student_id.
1026:
1027: Input: $student_id
1028:
1029: Output: undef on error, string $student (username:domain) on success.
1030:
1031: =cut
1032:
1033: ################################################
1034: ################################################
1035:
1036: my $have_read_student_table = 0;
1037: my %ids_by_student;
1038: my %students_by_id;
1039:
1040: sub get_student_id {
1041: my ($sname,$sdom) = @_;
1042: my $student = $sname.':'.$sdom;
1043: if (! $have_read_student_table) {
1044: my @Result = &Apache::lonmysql::get_rows($student_table);
1045: foreach (@Result) {
1046: $ids_by_student{$_->[1]}=$_->[0];
1047: }
1048: $have_read_student_table = 1;
1049: }
1050: if (! exists($ids_by_student{$student})) {
1051: &populate_student_table();
1052: undef(%ids_by_student);
1053: undef(%students_by_id);
1054: my @Result = &Apache::lonmysql::get_rows($student_table);
1055: foreach (@Result) {
1056: $ids_by_student{$_->[1]}=$_->[0];
1057: }
1058: }
1059: return $ids_by_student{$student} if(exists( $ids_by_student{$student}));
1060: return undef; # error
1061: }
1062:
1063: sub get_student {
1064: my ($student_id) = @_;
1065: if (! exists($students_by_id{$student_id}) ||
1066: ! defined($students_by_id{$student_id}) ||
1067: $students_by_id{$student_id} eq '') {
1068: my @Result = &Apache::lonmysql::get_rows($student_table);
1069: foreach (@Result) {
1070: $students_by_id{$_->[0]}=$_->[1];
1071: }
1072: }
1073: return $students_by_id{$student_id} if(exists($students_by_id{$student_id}));
1074: return undef; # error
1075: }
1076:
1077: sub populate_student_table {
1078: my ($courseid) = @_;
1079: if (! defined($courseid)) {
1080: $courseid = $ENV{'request.course.id'};
1081: }
1082: #
1083: &setup_table_names($courseid);
1084: my $dbh = &Apache::lonmysql::get_dbh();
1085: my $request = 'INSERT IGNORE INTO '.$student_table.
1086: "(student,section,status) VALUES ";
1087: my $classlist = &get_classlist($courseid);
1088: my $student_count=0;
1089: while (my ($student,$data) = each %$classlist) {
1090: my ($section,$status) = ($data->[&CL_SECTION()],
1091: $data->[&CL_STATUS()]);
1092: if ($section eq '' || $section =~ /^\s*$/) {
1093: $section = 'none';
1094: }
1095: $request .= "('".$student."','".$section."','".$status."'),";
1096: $student_count++;
1097: }
1098: return if ($student_count == 0);
1099: chop($request);
1100: $dbh->do($request);
1101: if ($dbh->err()) {
1102: &Apache::lonnet::logthis("error ".$dbh->errstr().
1103: " occured executing \n".
1104: $request);
1105: }
1106: return;
1107: }
1108:
1109: ################################################
1110: ################################################
1111:
1112: =pod
1113:
1114: =item &clear_internal_caches()
1115:
1116: Causes the internal caches used in get_student_id, get_student,
1117: get_symb_id, get_symb, get_part_id, and get_part to be undef'd.
1118:
1119: Needs to be called before the first operation with the MySQL database
1120: for a given Apache request.
1121:
1122: =cut
1123:
1124: ################################################
1125: ################################################
1126: sub clear_internal_caches {
1127: $have_read_part_table = 0;
1128: undef(%ids_by_part);
1129: undef(%parts_by_id);
1130: $have_read_symb_table = 0;
1131: undef(%ids_by_symb);
1132: undef(%symbs_by_id);
1133: $have_read_student_table = 0;
1134: undef(%ids_by_student);
1135: undef(%students_by_id);
1136: }
1137:
1138:
1139: ################################################
1140: ################################################
1141:
1142: =pod
1143:
1144: =item &update_full_student_data($sname,$sdom,$courseid)
1145:
1146: Does a lonnet::dump on a student to populate the courses tables.
1147:
1148: Input: $sname, $sdom, $courseid
1149:
1150: Output: $returnstatus
1151:
1152: $returnstatus is a string describing any errors that occured. 'okay' is the
1153: default.
1154:
1155: This subroutine loads a students data using lonnet::dump and inserts
1156: it into the MySQL database. The inserts are done on three tables,
1157: $fulldump_response_table, $fulldump_part_table, and $fulldump_timestamp_table.
1158: The INSERT calls are made directly by this subroutine, not through lonmysql
1159: because we do a 'bulk'insert which takes advantage of MySQLs non-SQL
1160: compliant INSERT command to insert multiple rows at a time.
1161: If anything has gone wrong during this process, $returnstatus is updated with
1162: a description of the error.
1163:
1164: Once the "fulldump" tables are updated, the tables used for chart and
1165: spreadsheet (which hold only the current state of the student on their
1166: homework, not historical data) are updated. If all updates have occured
1167: successfully, $student_table is updated to reflect the time of the update.
1168:
1169: Notice we do not insert the data and immediately query it. This means it
1170: is possible for there to be data returned this first time that is not
1171: available the second time. CYA.
1172:
1173: =cut
1174:
1175: ################################################
1176: ################################################
1177: sub update_full_student_data {
1178: my ($sname,$sdom,$courseid) = @_;
1179: #
1180: # Set up database names
1181: &setup_table_names($courseid);
1182: #
1183: my $student_id = &get_student_id($sname,$sdom);
1184: my $student = $sname.':'.$sdom;
1185: #
1186: my $returnstatus = 'okay';
1187: #
1188: # Download students data
1189: my $time_of_retrieval = time;
1190: my @tmp = &Apache::lonnet::dump($courseid,$sdom,$sname);
1191: if (@tmp && $tmp[0] =~ /^error/) {
1192: $returnstatus = 'error retrieving full student data';
1193: return $returnstatus;
1194: } elsif (! @tmp) {
1195: $returnstatus = 'okay: no student data';
1196: return $returnstatus;
1197: }
1198: my %studentdata = @tmp;
1199: #
1200: # Get database handle and clean out the tables
1201: my $dbh = &Apache::lonmysql::get_dbh();
1202: $dbh->do('DELETE FROM '.$fulldump_response_table.' WHERE student_id='.
1203: $student_id);
1204: $dbh->do('DELETE FROM '.$fulldump_part_table.' WHERE student_id='.
1205: $student_id);
1206: $dbh->do('DELETE FROM '.$fulldump_timestamp_table.' WHERE student_id='.
1207: $student_id);
1208: #
1209: # Parse and store the data into a form we can handle
1210: my $partdata;
1211: my $respdata;
1212: while (my ($key,$value) = each(%studentdata)) {
1213: next if ($key =~ /^(\d+):(resource$|subnum$|keys:)/);
1214: my ($transaction,$symb,$parameter) = split(':',$key);
1215: my $symb_id = &get_symb_id($symb);
1216: if ($parameter eq 'timestamp') {
1217: # We can deal with 'timestamp' right away
1218: my @timestamp_storage = ($symb_id,$student_id,
1219: $transaction,$value);
1220: my $store_command = 'INSERT IGNORE INTO '.$fulldump_timestamp_table.
1221: " VALUES ('".join("','",@timestamp_storage)."');";
1222: $dbh->do($store_command);
1223: if ($dbh->err()) {
1224: &Apache::lonnet::logthis('unable to execute '.$store_command);
1225: &Apache::lonnet::logthis($dbh->errstr());
1226: }
1227: next;
1228: } elsif ($parameter eq 'version') {
1229: next;
1230: } elsif ($parameter =~ /^resource\.(.*)\.(tries|
1231: award|
1232: awarded|
1233: previous|
1234: solved|
1235: awarddetail|
1236: submission|
1237: submissiongrading|
1238: molecule)\s*$/x){
1239: # we do not have enough information to store an
1240: # entire row, so we save it up until later.
1241: my ($part_and_resp_id,$field) = ($1,$2);
1242: my ($part,$part_id,$resp,$resp_id);
1243: if ($part_and_resp_id =~ /\./) {
1244: ($part,$resp) = split(/\./,$part_and_resp_id);
1245: $part_id = &get_part_id($part);
1246: $resp_id = &get_part_id($resp);
1247: } else {
1248: $part_id = &get_part_id($part_and_resp_id);
1249: }
1250: # Deal with part specific data
1251: if ($field =~ /^(tries|award|awarded|previous)$/) {
1252: $partdata->{$symb_id}->{$part_id}->{$transaction}->{$field}=$value;
1253: }
1254: # deal with response specific data
1255: if (defined($resp_id) &&
1256: $field =~ /^(awarddetail|
1257: submission|
1258: submissiongrading|
1259: molecule)$/x) {
1260: if ($field eq 'submission') {
1261: # We have to be careful with user supplied input.
1262: # most of the time we are okay because it is escaped.
1263: # However, there is one wrinkle: submissions which end in
1264: # and odd number of '\' cause insert errors to occur.
1265: # Best trap this somehow...
1266: $value = $dbh->quote($value);
1267: }
1268: if ($field eq 'submissiongrading' ||
1269: $field eq 'molecule') {
1270: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific'}=$field;
1271: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific_value'}=$value;
1272: } else {
1273: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{$field}=$value;
1274: }
1275: }
1276: }
1277: }
1278: ##
1279: ## Store the part data
1280: my $store_command = 'INSERT IGNORE INTO '.$fulldump_part_table.
1281: ' VALUES '."\n";
1282: my $store_rows = 0;
1283: while (my ($symb_id,$hash1) = each (%$partdata)) {
1284: while (my ($part_id,$hash2) = each (%$hash1)) {
1285: while (my ($transaction,$data) = each (%$hash2)) {
1286: $store_command .= "('".join("','",$symb_id,$part_id,
1287: $student_id,
1288: $transaction,
1289: $data->{'tries'},
1290: $data->{'award'},
1291: $data->{'awarded'},
1292: $data->{'previous'})."'),";
1293: $store_rows++;
1294: }
1295: }
1296: }
1297: if ($store_rows) {
1298: chop($store_command);
1299: $dbh->do($store_command);
1300: if ($dbh->err) {
1301: $returnstatus = 'error storing part data';
1302: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
1303: &Apache::lonnet::logthis("While attempting\n".$store_command);
1304: }
1305: }
1306: ##
1307: ## Store the response data
1308: $store_command = 'INSERT IGNORE INTO '.$fulldump_response_table.
1309: ' VALUES '."\n";
1310: $store_rows = 0;
1311: while (my ($symb_id,$hash1) = each (%$respdata)) {
1312: while (my ($part_id,$hash2) = each (%$hash1)) {
1313: while (my ($resp_id,$hash3) = each (%$hash2)) {
1314: while (my ($transaction,$data) = each (%$hash3)) {
1315: my $submission = $data->{'submission'};
1316: # We have to be careful with user supplied input.
1317: # most of the time we are okay because it is escaped.
1318: # However, there is one wrinkle: submissions which end in
1319: # and odd number of '\' cause insert errors to occur.
1320: # Best trap this somehow...
1321: $submission = $dbh->quote($submission);
1322: $store_command .= "('".
1323: join("','",$symb_id,$part_id,
1324: $resp_id,$student_id,
1325: $transaction,
1326: $data->{'awarddetail'},
1327: $data->{'response_specific'},
1328: $data->{'response_specific_value'}).
1329: "',".$submission."),";
1330: $store_rows++;
1331: }
1332: }
1333: }
1334: }
1335: if ($store_rows) {
1336: chop($store_command);
1337: $dbh->do($store_command);
1338: if ($dbh->err) {
1339: $returnstatus = 'error storing response data';
1340: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
1341: &Apache::lonnet::logthis("While attempting\n".$store_command);
1342: }
1343: }
1344: ##
1345: ## Update the students "current" data in the performance
1346: ## and parameters tables.
1347: my ($status,undef) = &store_student_data
1348: ($sname,$sdom,$courseid,
1349: &Apache::lonnet::convert_dump_to_currentdump(\%studentdata));
1350: if ($returnstatus eq 'okay' && $status ne 'okay') {
1351: $returnstatus = 'error storing current data:'.$status;
1352: } elsif ($status ne 'okay') {
1353: $returnstatus .= ' error storing current data:'.$status;
1354: }
1355: ##
1356: ## Update the students time......
1357: if ($returnstatus eq 'okay') {
1358: &store_updatetime($student_id,$time_of_retrieval,$time_of_retrieval);
1359: if ($dbh->err) {
1360: if ($returnstatus eq 'okay') {
1361: $returnstatus = 'error updating student time';
1362: } else {
1363: $returnstatus = 'error updating student time';
1364: }
1365: }
1366: }
1367: return $returnstatus;
1368: }
1369:
1370: ################################################
1371: ################################################
1372:
1373: =pod
1374:
1375: =item &update_student_data()
1376:
1377: Input: $sname, $sdom, $courseid
1378:
1379: Output: $returnstatus, \%student_data
1380:
1381: $returnstatus is a string describing any errors that occured. 'okay' is the
1382: default.
1383: \%student_data is the data returned by a call to lonnet::currentdump.
1384:
1385: This subroutine loads a students data using lonnet::currentdump and inserts
1386: it into the MySQL database. The inserts are done on two tables,
1387: $performance_table and $parameters_table. $parameters_table holds the data
1388: that is not included in $performance_table. See the description of
1389: $performance_table elsewhere in this file. The INSERT calls are made
1390: directly by this subroutine, not through lonmysql because we do a 'bulk'
1391: insert which takes advantage of MySQLs non-SQL compliant INSERT command to
1392: insert multiple rows at a time. If anything has gone wrong during this
1393: process, $returnstatus is updated with a description of the error and
1394: \%student_data is returned.
1395:
1396: Notice we do not insert the data and immediately query it. This means it
1397: is possible for there to be data returned this first time that is not
1398: available the second time. CYA.
1399:
1400: =cut
1401:
1402: ################################################
1403: ################################################
1404: sub update_student_data {
1405: my ($sname,$sdom,$courseid) = @_;
1406: #
1407: # Set up database names
1408: &setup_table_names($courseid);
1409: #
1410: my $student_id = &get_student_id($sname,$sdom);
1411: my $student = $sname.':'.$sdom;
1412: #
1413: my $returnstatus = 'okay';
1414: #
1415: # Download students data
1416: my $time_of_retrieval = time;
1417: my @tmp = &Apache::lonnet::currentdump($courseid,$sdom,$sname);
1418: if ((scalar(@tmp) > 0) && ($tmp[0] =~ /^error:/)) {
1419: &Apache::lonnet::logthis('error getting data for '.
1420: $sname.':'.$sdom.' in course '.$courseid.
1421: ':'.$tmp[0]);
1422: $returnstatus = 'error getting data';
1423: return ($returnstatus,undef);
1424: }
1425: if (scalar(@tmp) < 1) {
1426: return ('no data',undef);
1427: }
1428: my %student_data = @tmp;
1429: my @Results = &store_student_data($sname,$sdom,$courseid,\%student_data);
1430: #
1431: # Set the students update time
1432: if ($Results[0] eq 'okay') {
1433: &store_updatetime($student_id,$time_of_retrieval,$time_of_retrieval);
1434: }
1435: #
1436: return @Results;
1437: }
1438:
1439: sub store_updatetime {
1440: my ($student_id,$updatetime,$fullupdatetime)=@_;
1441: my $values = '';
1442: if (defined($updatetime)) {
1443: $values = 'updatetime='.$updatetime.' ';
1444: }
1445: if (defined($fullupdatetime)) {
1446: if ($values ne '') {
1447: $values .= ',';
1448: }
1449: $values .= 'fullupdatetime='.$fullupdatetime.' ';
1450: }
1451: return if ($values eq '');
1452: my $dbh = &Apache::lonmysql::get_dbh();
1453: my $request = 'UPDATE '.$student_table.' SET '.$values.
1454: ' WHERE student_id='.$student_id.' LIMIT 1';
1455: $dbh->do($request);
1456: }
1457:
1458: sub store_student_data {
1459: my ($sname,$sdom,$courseid,$student_data) = @_;
1460: #
1461: my $student_id = &get_student_id($sname,$sdom);
1462: my $student = $sname.':'.$sdom;
1463: #
1464: my $returnstatus = 'okay';
1465: #
1466: # Remove all of the students data from the table
1467: my $dbh = &Apache::lonmysql::get_dbh();
1468: $dbh->do('DELETE FROM '.$performance_table.' WHERE student_id='.
1469: $student_id);
1470: $dbh->do('DELETE FROM '.$parameters_table.' WHERE student_id='.
1471: $student_id);
1472: #
1473: # Store away the data
1474: #
1475: my $starttime = Time::HiRes::time;
1476: my $elapsed = 0;
1477: my $rows_stored;
1478: my $store_parameters_command = 'INSERT IGNORE INTO '.$parameters_table.
1479: ' VALUES '."\n";
1480: my $num_parameters = 0;
1481: my $store_performance_command = 'INSERT IGNORE INTO '.$performance_table.
1482: ' VALUES '."\n";
1483: return ('error',undef) if (! defined($dbh));
1484: while (my ($current_symb,$param_hash) = each(%{$student_data})) {
1485: #
1486: # make sure the symb is set up properly
1487: my $symb_id = &get_symb_id($current_symb);
1488: #
1489: # Load data into the tables
1490: while (my ($parameter,$value) = each(%$param_hash)) {
1491: my $newstring;
1492: if ($parameter !~ /(timestamp|resource\.(.*)\.(solved|tries|awarded|award|awarddetail|previous))/) {
1493: $newstring = "('".join("','",
1494: $symb_id,$student_id,
1495: $parameter)."',".
1496: $dbh->quote($value)."),\n";
1497: $num_parameters ++;
1498: if ($newstring !~ /''/) {
1499: $store_parameters_command .= $newstring;
1500: $rows_stored++;
1501: }
1502: }
1503: next if ($parameter !~ /^resource\.(.*)\.solved$/);
1504: #
1505: my $part = $1;
1506: my $part_id = &get_part_id($part);
1507: next if (!defined($part_id));
1508: my $solved = $value;
1509: my $tries = $param_hash->{'resource.'.$part.'.tries'};
1510: my $awarded = $param_hash->{'resource.'.$part.'.awarded'};
1511: my $award = $param_hash->{'resource.'.$part.'.award'};
1512: my $awarddetail = $param_hash->{'resource.'.$part.'.awarddetail'};
1513: my $timestamp = $param_hash->{'timestamp'};
1514: #
1515: $solved = '' if (! defined($solved));
1516: $tries = '' if (! defined($tries));
1517: $awarded = '' if (! defined($awarded));
1518: $award = '' if (! defined($award));
1519: $awarddetail = '' if (! defined($awarddetail));
1520: $newstring = "('".join("','",$symb_id,$student_id,$part_id,$part,
1521: $solved,$tries,$awarded,$award,
1522: $awarddetail,$timestamp)."'),\n";
1523: $store_performance_command .= $newstring;
1524: $rows_stored++;
1525: }
1526: }
1527: chop $store_parameters_command;
1528: chop $store_parameters_command;
1529: chop $store_performance_command;
1530: chop $store_performance_command;
1531: my $start = Time::HiRes::time;
1532: $dbh->do($store_performance_command);
1533: if ($dbh->err()) {
1534: &Apache::lonnet::logthis(' bigass insert error:'.$dbh->errstr());
1535: &Apache::lonnet::logthis('command = '.$store_performance_command);
1536: $returnstatus = 'error: unable to insert performance into database';
1537: return ($returnstatus,$student_data);
1538: }
1539: $dbh->do($store_parameters_command) if ($num_parameters>0);
1540: if ($dbh->err()) {
1541: &Apache::lonnet::logthis(' bigass insert error:'.$dbh->errstr());
1542: &Apache::lonnet::logthis('command = '.$store_parameters_command);
1543: &Apache::lonnet::logthis('rows_stored = '.$rows_stored);
1544: &Apache::lonnet::logthis('student_id = '.$student_id);
1545: $returnstatus = 'error: unable to insert parameters into database';
1546: return ($returnstatus,$student_data);
1547: }
1548: $elapsed += Time::HiRes::time - $start;
1549: return ($returnstatus,$student_data);
1550: }
1551:
1552: ######################################
1553: ######################################
1554:
1555: =pod
1556:
1557: =item &ensure_tables_are_set_up($courseid)
1558:
1559: Checks to be sure the MySQL tables for the given class are set up.
1560: If $courseid is omitted it will be obtained from the environment.
1561:
1562: Returns nothing on success and 'error' on failure
1563:
1564: =cut
1565:
1566: ######################################
1567: ######################################
1568: sub ensure_tables_are_set_up {
1569: my ($courseid) = @_;
1570: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1571: #
1572: # Clean out package variables
1573: &setup_table_names($courseid);
1574: #
1575: # if the tables do not exist, make them
1576: my @CurrentTable = &Apache::lonmysql::tables_in_db();
1577: my ($found_symb,$found_student,$found_part,
1578: $found_performance,$found_parameters,$found_fulldump_part,
1579: $found_fulldump_response,$found_fulldump_timestamp,
1580: $found_weight);
1581: foreach (@CurrentTable) {
1582: $found_symb = 1 if ($_ eq $symb_table);
1583: $found_student = 1 if ($_ eq $student_table);
1584: $found_part = 1 if ($_ eq $part_table);
1585: $found_performance = 1 if ($_ eq $performance_table);
1586: $found_parameters = 1 if ($_ eq $parameters_table);
1587: $found_fulldump_part = 1 if ($_ eq $fulldump_part_table);
1588: $found_fulldump_response = 1 if ($_ eq $fulldump_response_table);
1589: $found_fulldump_timestamp = 1 if ($_ eq $fulldump_timestamp_table);
1590: $found_weight = 1 if ($_ eq $weight_table);
1591: }
1592: if (!$found_symb ||
1593: !$found_student || !$found_part ||
1594: !$found_performance || !$found_parameters ||
1595: !$found_fulldump_part || !$found_fulldump_response ||
1596: !$found_fulldump_timestamp || !$found_weight ) {
1597: if (&init_dbs($courseid)) {
1598: return 'error';
1599: }
1600: }
1601: }
1602:
1603: ################################################
1604: ################################################
1605:
1606: =pod
1607:
1608: =item &ensure_current_data()
1609:
1610: Input: $sname, $sdom, $courseid
1611:
1612: Output: $status, $data
1613:
1614: This routine ensures the data for a given student is up to date.
1615: The $student_table is queried to determine the time of the last update.
1616: If the students data is out of date, &update_student_data() is called.
1617: The return values from the call to &update_student_data() are returned.
1618:
1619: =cut
1620:
1621: ################################################
1622: ################################################
1623: sub ensure_current_data {
1624: my ($sname,$sdom,$courseid) = @_;
1625: my $status = 'okay'; # return value
1626: #
1627: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1628: &ensure_tables_are_set_up($courseid);
1629: #
1630: # Get the update time for the user
1631: my $updatetime = 0;
1632: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1633: ($sdom,$sname,$courseid.'.db',
1634: $Apache::lonnet::perlvar{'lonUsersDir'});
1635: #
1636: my $student_id = &get_student_id($sname,$sdom);
1637: my @Result = &Apache::lonmysql::get_rows($student_table,
1638: "student_id ='$student_id'");
1639: my $data = undef;
1640: if (@Result) {
1641: $updatetime = $Result[0]->[5]; # Ack! This is dumb!
1642: }
1643: if ($modifiedtime > $updatetime) {
1644: ($status,$data) = &update_student_data($sname,$sdom,$courseid);
1645: }
1646: return ($status,$data);
1647: }
1648:
1649: ################################################
1650: ################################################
1651:
1652: =pod
1653:
1654: =item &ensure_current_full_data($sname,$sdom,$courseid)
1655:
1656: Input: $sname, $sdom, $courseid
1657:
1658: Output: $status
1659:
1660: This routine ensures the fulldata (the data from a lonnet::dump, not a
1661: lonnet::currentdump) for a given student is up to date.
1662: The $student_table is queried to determine the time of the last update.
1663: If the students fulldata is out of date, &update_full_student_data() is
1664: called.
1665:
1666: The return value from the call to &update_full_student_data() is returned.
1667:
1668: =cut
1669:
1670: ################################################
1671: ################################################
1672: sub ensure_current_full_data {
1673: my ($sname,$sdom,$courseid) = @_;
1674: my $status = 'okay'; # return value
1675: #
1676: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1677: &ensure_tables_are_set_up($courseid);
1678: #
1679: # Get the update time for the user
1680: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1681: ($sdom,$sname,$courseid.'.db',
1682: $Apache::lonnet::perlvar{'lonUsersDir'});
1683: #
1684: my $student_id = &get_student_id($sname,$sdom);
1685: my @Result = &Apache::lonmysql::get_rows($student_table,
1686: "student_id ='$student_id'");
1687: my $updatetime;
1688: if (@Result && ref($Result[0]) eq 'ARRAY') {
1689: $updatetime = $Result[0]->[6];
1690: }
1691: if (! defined($updatetime) || $modifiedtime > $updatetime) {
1692: $status = &update_full_student_data($sname,$sdom,$courseid);
1693: }
1694: return $status;
1695: }
1696:
1697: ################################################
1698: ################################################
1699:
1700: =pod
1701:
1702: =item &get_student_data_from_performance_cache()
1703:
1704: Input: $sname, $sdom, $symb, $courseid
1705:
1706: Output: hash reference containing the data for the given student.
1707: If $symb is undef, all the students data is returned.
1708:
1709: This routine is the heart of the local caching system. See the description
1710: of $performance_table, $symb_table, $student_table, and $part_table. The
1711: main task is building the MySQL request. The tables appear in the request
1712: in the order in which they should be parsed by MySQL. When searching
1713: on a student the $student_table is used to locate the 'student_id'. All
1714: rows in $performance_table which have a matching 'student_id' are returned,
1715: with data from $part_table and $symb_table which match the entries in
1716: $performance_table, 'part_id' and 'symb_id'. When searching on a symb,
1717: the $symb_table is processed first, with matching rows grabbed from
1718: $performance_table and filled in from $part_table and $student_table in
1719: that order.
1720:
1721: Running 'EXPLAIN ' on the 'SELECT' statements generated can be quite
1722: interesting, especially if you play with the order the tables are listed.
1723:
1724: =cut
1725:
1726: ################################################
1727: ################################################
1728: sub get_student_data_from_performance_cache {
1729: my ($sname,$sdom,$symb,$courseid)=@_;
1730: my $student = $sname.':'.$sdom if (defined($sname) && defined($sdom));
1731: &setup_table_names($courseid);
1732: #
1733: # Return hash
1734: my $studentdata;
1735: #
1736: my $dbh = &Apache::lonmysql::get_dbh();
1737: my $request = "SELECT ".
1738: "d.symb,a.part,a.solved,a.tries,a.awarded,a.award,a.awarddetail,".
1739: "a.timestamp ";
1740: if (defined($student)) {
1741: $request .= "FROM $student_table AS b ".
1742: "LEFT JOIN $performance_table AS a ON b.student_id=a.student_id ".
1743: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1744: "LEFT JOIN $symb_table AS d ON d.symb_id = a.symb_id ".
1745: "WHERE student='$student'";
1746: if (defined($symb) && $symb ne '') {
1747: $request .= " AND d.symb=".$dbh->quote($symb);
1748: }
1749: } elsif (defined($symb) && $symb ne '') {
1750: $request .= "FROM $symb_table as d ".
1751: "LEFT JOIN $performance_table AS a ON d.symb_id=a.symb_id ".
1752: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1753: "LEFT JOIN $student_table AS b ON b.student_id = a.student_id ".
1754: "WHERE symb='".$dbh->quote($symb)."'";
1755: }
1756: my $starttime = Time::HiRes::time;
1757: my $rows_retrieved = 0;
1758: my $sth = $dbh->prepare($request);
1759: $sth->execute();
1760: if ($sth->err()) {
1761: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1762: &Apache::lonnet::logthis("\n".$request."\n");
1763: &Apache::lonnet::logthis("error is:".$sth->errstr());
1764: return undef;
1765: }
1766: foreach my $row (@{$sth->fetchall_arrayref}) {
1767: $rows_retrieved++;
1768: my ($symb,$part,$solved,$tries,$awarded,$award,$awarddetail,$time) =
1769: (@$row);
1770: my $base = 'resource.'.$part;
1771: $studentdata->{$symb}->{$base.'.solved'} = $solved;
1772: $studentdata->{$symb}->{$base.'.tries'} = $tries;
1773: $studentdata->{$symb}->{$base.'.awarded'} = $awarded;
1774: $studentdata->{$symb}->{$base.'.award'} = $award;
1775: $studentdata->{$symb}->{$base.'.awarddetail'} = $awarddetail;
1776: $studentdata->{$symb}->{'timestamp'} = $time if (defined($time) && $time ne '');
1777: }
1778: ## Get misc parameters
1779: $request = 'SELECT c.symb,a.parameter,a.value '.
1780: "FROM $student_table AS b ".
1781: "LEFT JOIN $parameters_table AS a ON b.student_id=a.student_id ".
1782: "LEFT JOIN $symb_table AS c ON c.symb_id = a.symb_id ".
1783: "WHERE student='$student'";
1784: if (defined($symb) && $symb ne '') {
1785: $request .= " AND c.symb=".$dbh->quote($symb);
1786: }
1787: $sth = $dbh->prepare($request);
1788: $sth->execute();
1789: if ($sth->err()) {
1790: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1791: &Apache::lonnet::logthis("\n".$request."\n");
1792: &Apache::lonnet::logthis("error is:".$sth->errstr());
1793: if (defined($symb) && $symb ne '') {
1794: $studentdata = $studentdata->{$symb};
1795: }
1796: return $studentdata;
1797: }
1798: #
1799: foreach my $row (@{$sth->fetchall_arrayref}) {
1800: $rows_retrieved++;
1801: my ($symb,$parameter,$value) = (@$row);
1802: $studentdata->{$symb}->{$parameter} = $value;
1803: }
1804: #
1805: if (defined($symb) && $symb ne '') {
1806: $studentdata = $studentdata->{$symb};
1807: }
1808: return $studentdata;
1809: }
1810:
1811: ################################################
1812: ################################################
1813:
1814: =pod
1815:
1816: =item &get_current_state()
1817:
1818: Input: $sname,$sdom,$symb,$courseid
1819:
1820: Output: Described below
1821:
1822: Retrieve the current status of a students performance. $sname and
1823: $sdom are the only required parameters. If $symb is undef the results
1824: of an &Apache::lonnet::currentdump() will be returned.
1825: If $courseid is undef it will be retrieved from the environment.
1826:
1827: The return structure is based on &Apache::lonnet::currentdump. If
1828: $symb is unspecified, all the students data is returned in a hash of
1829: the form:
1830: (
1831: symb1 => { param1 => value1, param2 => value2 ... },
1832: symb2 => { param1 => value1, param2 => value2 ... },
1833: )
1834:
1835: If $symb is specified, a hash of
1836: (
1837: param1 => value1,
1838: param2 => value2,
1839: )
1840: is returned.
1841:
1842: If no data is found for $symb, or if the student has no performance data,
1843: an empty list is returned.
1844:
1845: =cut
1846:
1847: ################################################
1848: ################################################
1849: sub get_current_state {
1850: my ($sname,$sdom,$symb,$courseid,$forcedownload)=@_;
1851: #
1852: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1853: #
1854: return () if (! defined($sname) || ! defined($sdom));
1855: #
1856: my ($status,$data) = &ensure_current_data($sname,$sdom,$courseid);
1857: # &Apache::lonnet::logthis
1858: # ('sname = '.$sname.
1859: # ' domain = '.$sdom.
1860: # ' status = '.$status.
1861: # ' data is '.(defined($data)?'defined':'undefined'));
1862: # while (my ($symb,$hash) = each(%$data)) {
1863: # &Apache::lonnet::logthis($symb."\n----------------------------------");
1864: # while (my ($key,$value) = each (%$hash)) {
1865: # &Apache::lonnet::logthis(" ".$key." = ".$value);
1866: # }
1867: # }
1868: #
1869: if (defined($data) && defined($symb) && ref($data->{$symb})) {
1870: return %{$data->{$symb}};
1871: } elsif (defined($data) && ! defined($symb) && ref($data)) {
1872: return %$data;
1873: }
1874: if ($status eq 'no data') {
1875: return ();
1876: } else {
1877: if ($status ne 'okay' && $status ne '') {
1878: &Apache::lonnet::logthis('status = '.$status);
1879: return ();
1880: }
1881: my $returnhash = &get_student_data_from_performance_cache($sname,$sdom,
1882: $symb,$courseid);
1883: return %$returnhash if (defined($returnhash));
1884: }
1885: return ();
1886: }
1887:
1888: ################################################
1889: ################################################
1890:
1891: =pod
1892:
1893: =item &get_problem_statistics()
1894:
1895: Gather data on a given problem. The database is assumed to be
1896: populated and all local caching variables are assumed to be set
1897: properly. This means you need to call &ensure_current_data for
1898: the students you are concerned with prior to calling this routine.
1899:
1900: Inputs: $Sections, $status, $symb, $part, $courseid, $starttime, $endtime
1901:
1902: =over 4
1903:
1904: =item $Sections Array ref containing section names for students.
1905: 'all' is allowed to be the first (and only) item in the array.
1906:
1907: =item $status String describing the status of students
1908:
1909: =item $symb is the symb for the problem.
1910:
1911: =item $part is the part id you need statistics for
1912:
1913: =item $courseid is the course id, of course!
1914:
1915: =item $starttime and $endtime are unix times which to use to limit
1916: the statistical data.
1917:
1918: =back
1919:
1920: Outputs: See the code for up to date information. A hash reference is
1921: returned. The hash has the following keys defined:
1922:
1923: =over 4
1924:
1925: =item num_students The number of students attempting the problem
1926:
1927: =item tries The total number of tries for the students
1928:
1929: =item max_tries The maximum number of tries taken
1930:
1931: =item mean_tries The average number of tries
1932:
1933: =item num_solved The number of students able to solve the problem
1934:
1935: =item num_override The number of students whose answer is 'correct_by_override'
1936:
1937: =item deg_of_diff The degree of difficulty of the problem
1938:
1939: =item std_tries The standard deviation of the number of tries
1940:
1941: =item skew_tries The skew of the number of tries
1942:
1943: =item per_wrong The number of students attempting the problem who were not
1944: able to answer it correctly.
1945:
1946: =back
1947:
1948: =cut
1949:
1950: ################################################
1951: ################################################
1952: sub get_problem_statistics {
1953: my ($Sections,$status,$symb,$part,$courseid,$starttime,$endtime) = @_;
1954: return if (! defined($symb) || ! defined($part));
1955: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1956: #
1957: &setup_table_names($courseid);
1958: my $symb_id = &get_symb_id($symb);
1959: my $part_id = &get_part_id($part);
1960: my $stats_table = $courseid.'_problem_stats';
1961: #
1962: my $dbh = &Apache::lonmysql::get_dbh();
1963: return undef if (! defined($dbh));
1964: #
1965: # Clean out the table
1966: $dbh->do('DROP TABLE '.$stats_table); # May return an error
1967: my $request =
1968: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
1969: 'SELECT a.student_id,a.solved,a.award,a.awarded,a.tries '.
1970: 'FROM '.$performance_table.' AS a ';
1971: #
1972: # See if we need to include some requirements on the students
1973: if ((defined($Sections) && lc($Sections->[0]) ne 'all') ||
1974: (defined($status) && lc($status) ne 'any')) {
1975: $request .= 'NATURAL LEFT JOIN '.$student_table.' AS b ';
1976: }
1977: $request .= ' WHERE a.symb_id='.$symb_id.' AND a.part_id='.$part_id;
1978: #
1979: # Limit the students included to those specified
1980: if (defined($Sections) && lc($Sections->[0]) ne 'all') {
1981: $request .= ' AND ('.
1982: join(' OR ', map { "b.section='".$_."'" } @$Sections
1983: ).')';
1984: }
1985: if (defined($status) && lc($status) ne 'any') {
1986: $request .= " AND b.status='".$status."'";
1987: }
1988: #
1989: # Limit by starttime and endtime
1990: my $time_requirements = undef;
1991: if (defined($starttime)) {
1992: $time_requirements .= 'a.timestamp>='.$starttime;
1993: if (defined($endtime)) {
1994: $time_requirements .= ' AND a.timestamp<='.$endtime;
1995: }
1996: } elsif (defined($endtime)) {
1997: $time_requirements .= 'a.timestamp<='.$endtime;
1998: }
1999: if (defined($time_requirements)) {
2000: $request .= ' AND '.$time_requirements;
2001: }
2002: #
2003: # Finally, execute the request to create the temporary table
2004: $dbh->do($request);
2005: #
2006: # Collect the first suite of statistics
2007: $request = 'SELECT COUNT(*),SUM(tries),'.
2008: 'AVG(tries),STD(tries) '.
2009: 'FROM '.$stats_table;
2010: my ($num,$tries,$mean,$STD) = &execute_SQL_request
2011: ($dbh,$request);
2012: #
2013: $request = 'SELECT MAX(tries),MIN(tries) FROM '.$stats_table.
2014: ' WHERE awarded>0';
2015: if (defined($time_requirements)) {
2016: $request .= ' AND '.$time_requirements;
2017: }
2018: my ($max,$min) = &execute_SQL_request($dbh,$request);
2019: #
2020: $request = 'SELECT SUM(awarded) FROM '.$stats_table;
2021: if (defined($time_requirements)) {
2022: $request .= ' AND '.$time_requirements;
2023: }
2024: my ($Solved) = &execute_SQL_request($dbh,$request);
2025: #
2026: $request = 'SELECT SUM(awarded) FROM '.$stats_table.
2027: " WHERE solved='correct_by_override'";
2028: if (defined($time_requirements)) {
2029: $request .= ' AND '.$time_requirements;
2030: }
2031: my ($solved) = &execute_SQL_request($dbh,$request);
2032: #
2033: $num = 0 if (! defined($num));
2034: $tries = 0 if (! defined($tries));
2035: $max = 0 if (! defined($max));
2036: $min = 0 if (! defined($min));
2037: $STD = 0 if (! defined($STD));
2038: $Solved = 0 if (! defined($Solved));
2039: $solved = 0 if (! defined($solved));
2040: #
2041: # Compute the more complicated statistics
2042: my $DegOfDiff = 'nan';
2043: $DegOfDiff = 1-($Solved)/$tries if ($tries>0);
2044: #
2045: my $SKEW = 'nan';
2046: my $wrongpercent = 0;
2047: my $numwrong = 'nan';
2048: if ($num > 0) {
2049: ($SKEW) = &execute_SQL_request($dbh,'SELECT SQRT(SUM('.
2050: 'POWER(tries - '.$STD.',3)'.
2051: '))/'.$num.' FROM '.$stats_table);
2052: $numwrong = $num-$Solved;
2053: $wrongpercent=int(10*100*$numwrong/$num)/10;
2054: }
2055: #
2056: # Drop the temporary table
2057: $dbh->do('DROP TABLE '.$stats_table); # May return an error
2058: #
2059: # Return result
2060: return { num_students => $num,
2061: tries => $tries,
2062: max_tries => $max,
2063: min_tries => $min,
2064: mean_tries => $mean,
2065: std_tries => $STD,
2066: skew_tries => $SKEW,
2067: num_solved => $Solved,
2068: num_override => $solved,
2069: num_wrong => $numwrong,
2070: per_wrong => $wrongpercent,
2071: deg_of_diff => $DegOfDiff };
2072: }
2073:
2074: ##
2075: ## This is a helper for get_statistics
2076: sub execute_SQL_request {
2077: my ($dbh,$request)=@_;
2078: # &Apache::lonnet::logthis($request);
2079: my $sth = $dbh->prepare($request);
2080: $sth->execute();
2081: my $row = $sth->fetchrow_arrayref();
2082: if (ref($row) eq 'ARRAY' && scalar(@$row)>0) {
2083: return @$row;
2084: }
2085: return ();
2086: }
2087:
2088: ######################################################
2089: ######################################################
2090:
2091: =pod
2092:
2093: =item &populate_weight_table
2094:
2095: =cut
2096:
2097: ######################################################
2098: ######################################################
2099: sub populate_weight_table {
2100: my ($courseid) = @_;
2101: if (! defined($courseid)) {
2102: $courseid = $ENV{'request.course.id'};
2103: }
2104: #
2105: &setup_table_names($courseid);
2106: my ($top,$sequences,$assessments) = get_sequence_assessment_data();
2107: if (! defined($top) || ! ref($top)) {
2108: # There has been an error, better report it
2109: &Apache::lonnet::logthis('top is undefined');
2110: return;
2111: }
2112: # Since we use lonnet::EXT to retrieve problem weights,
2113: # to ensure current data we must clear the caches out.
2114: &Apache::lonnet::clear_EXT_cache_status();
2115: my $dbh = &Apache::lonmysql::get_dbh();
2116: my $request = 'INSERT IGNORE INTO '.$weight_table.
2117: "(symb_id,part_id,weight) VALUES ";
2118: my $weight;
2119: foreach my $res (@$assessments) {
2120: my $symb_id = &get_symb_id($res->{'symb'});
2121: foreach my $part (@{$res->{'parts'}}) {
2122: my $part_id = &get_part_id($part);
2123: $weight = &Apache::lonnet::EXT('resource.'.$part.'.weight',
2124: $res->{'symb'},
2125: undef,undef,undef);
2126: if (!defined($weight) || ($weight eq '')) {
2127: $weight=1;
2128: }
2129: $request .= "('".$symb_id."','".$part_id."','".$weight."'),";
2130: }
2131: }
2132: $request =~ s/(,)$//;
2133: # &Apache::lonnet::logthis('request = '.$/.$request);
2134: $dbh->do($request);
2135: if ($dbh->err()) {
2136: &Apache::lonnet::logthis("error ".$dbh->errstr().
2137: " occured executing \n".
2138: $request);
2139: }
2140: return;
2141: }
2142:
2143: ##########################################################
2144: ##########################################################
2145:
2146: =pod
2147:
2148: =item &limit_by_start_end_times
2149:
2150: Build SQL WHERE condition which limits the data collected by the start
2151: and end times provided
2152:
2153: Inputs: $starttime, $endtime, $table
2154:
2155: Returns: $time_limits
2156:
2157: =cut
2158:
2159: ##########################################################
2160: ##########################################################
2161: sub limit_by_start_end_time {
2162: my ($starttime,$endtime,$table) = @_;
2163: my $time_requirements = undef;
2164: if (defined($starttime)) {
2165: $time_requirements .= $table.".timestamp>='".$starttime."'";
2166: if (defined($endtime)) {
2167: $time_requirements .= " AND ".$table.".timestamp<='".$endtime."'";
2168: }
2169: } elsif (defined($endtime)) {
2170: $time_requirements .= $table.".timestamp<='".$endtime."'";
2171: }
2172: return $time_requirements;
2173: }
2174:
2175: ##########################################################
2176: ##########################################################
2177:
2178: =pod
2179:
2180: =item &limit_by_section_and_status
2181:
2182: Build SQL WHERE condition which limits the data collected by section and
2183: student status.
2184:
2185: Inputs: $Sections (array ref)
2186: $enrollment (string: 'any', 'expired', 'active')
2187: $tablename The name of the table that holds the student data
2188:
2189: Returns: $student_requirements,$enrollment_requirements
2190:
2191: =cut
2192:
2193: ##########################################################
2194: ##########################################################
2195: sub limit_by_section_and_status {
2196: my ($Sections,$enrollment,$tablename) = @_;
2197: my $student_requirements = undef;
2198: if ( (defined($Sections) && $Sections->[0] ne 'all')) {
2199: $student_requirements = '('.
2200: join(' OR ', map { $tablename.".section='".$_."'" } @$Sections
2201: ).')';
2202: }
2203: #
2204: my $enrollment_requirements=undef;
2205: if (defined($enrollment) && $enrollment ne 'Any') {
2206: $enrollment_requirements = $tablename.".status='".$enrollment."'";
2207: }
2208: return ($student_requirements,$enrollment_requirements);
2209: }
2210:
2211: ######################################################
2212: ######################################################
2213:
2214: =pod
2215:
2216: =item rank_students_by_scores_on_resources
2217:
2218: Inputs:
2219: $resources: array ref of hash ref. Each hash ref needs key 'symb'.
2220: $Sections: array ref of sections to include,
2221: $enrollment: string,
2222: $courseid (may be omitted)
2223:
2224: Returns; An array of arrays. The sub arrays contain a student name and
2225: their score on the resources.
2226:
2227: =cut
2228:
2229: ######################################################
2230: ######################################################
2231: sub RNK_student { return 0; };
2232: sub RNK_score { return 1; };
2233:
2234: sub rank_students_by_scores_on_resources {
2235: my ($resources,$Sections,$enrollment,$courseid,$starttime,$endtime) = @_;
2236: return if (! defined($resources) || ! ref($resources) eq 'ARRAY');
2237: if (! defined($courseid)) {
2238: $courseid = $ENV{'request.course.id'};
2239: }
2240: #
2241: &setup_table_names($courseid);
2242: my $dbh = &Apache::lonmysql::get_dbh();
2243: my ($section_limits,$enrollment_limits)=
2244: &limit_by_section_and_status($Sections,$enrollment,'b');
2245: my $symb_limits = '('.join(' OR ',map {'a.symb_id='.&get_symb_id($_);
2246: } @$resources
2247: ).')';
2248: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
2249: my $request = 'SELECT b.student,SUM(a.awarded*w.weight) AS score FROM '.
2250: $performance_table.' AS a '.
2251: 'NATURAL LEFT JOIN '.$weight_table.' AS w '.
2252: 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.
2253: 'WHERE ';
2254: if (defined($section_limits)) {
2255: $request .= $section_limits.' AND ';
2256: }
2257: if (defined($enrollment_limits)) {
2258: $request .= $enrollment_limits.' AND ';
2259: }
2260: if (defined($time_limits)) {
2261: $request .= $time_limits.' AND ';
2262: }
2263: if ($symb_limits ne '()') {
2264: $request .= $symb_limits.' AND ';
2265: }
2266: $request =~ s/( AND )$//; # Remove extra conjunction
2267: $request =~ s/( WHERE )$//; # In case there were no limits placed on it
2268: $request .= ' GROUP BY a.student_id ORDER BY score';
2269: #&Apache::lonnet::logthis('request = '.$/.$request);
2270: my $sth = $dbh->prepare($request);
2271: $sth->execute();
2272: my $rows = $sth->fetchall_arrayref();
2273: return ($rows);
2274: }
2275:
2276: ########################################################
2277: ########################################################
2278:
2279: =pod
2280:
2281: =item &get_sum_of_scores
2282:
2283: Inputs: $resource (hash ref, needs {'symb'} key),
2284: $part, (the part id),
2285: $students (array ref, contents of array are scalars holding 'sname:sdom'),
2286: $courseid
2287:
2288: Returns: the sum of the score on the problem part over the students and the
2289: maximum possible value for the sum (taken from the weight table).
2290:
2291: =cut
2292:
2293: ########################################################
2294: ########################################################
2295: sub get_sum_of_scores {
2296: my ($resource,$part,$students,$courseid,$starttime,$endtime) = @_;
2297: if (! defined($courseid)) {
2298: $courseid = $ENV{'request.course.id'};
2299: }
2300: #
2301: &setup_table_names($courseid);
2302: my $dbh = &Apache::lonmysql::get_dbh();
2303: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
2304: my $request = 'SELECT SUM(a.awarded*w.weight),SUM(w.weight) FROM '.
2305: $performance_table.' AS a '.
2306: 'NATURAL LEFT JOIN '.$weight_table.' AS w ';
2307: $request .= 'WHERE a.symb_id='.&get_symb_id($resource->{'symb'}).
2308: ' AND a.part_id='.&get_part_id($part);
2309: if (defined($time_limits)) {
2310: $request .= ' AND '.$time_limits;
2311: }
2312: if (defined($students)) {
2313: $request .= ' AND ('.
2314: join(' OR ',map {'a.student_id='.&get_student_id(split(':',$_));
2315: } @$students).
2316: ')';
2317: }
2318: my $sth = $dbh->prepare($request);
2319: $sth->execute();
2320: my $rows = $sth->fetchrow_arrayref();
2321: if ($dbh->err) {
2322: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2323: return (undef,undef);
2324: }
2325: return ($rows->[0],$rows->[1]);
2326: }
2327:
2328: ########################################################
2329: ########################################################
2330:
2331: =pod
2332:
2333: =item &score_stats
2334:
2335: Inputs: $Sections, $enrollment, $symbs, $starttime,
2336: $endtime, $courseid
2337:
2338: $Sections, $enrollment, $starttime, $endtime, and $courseid are the same as
2339: elsewhere in this module.
2340: $symbs is an array ref of symbs
2341:
2342: Returns: minimum, maximum, mean, s.d., number of students, and maximum
2343: possible of student scores on the given resources
2344:
2345: =cut
2346:
2347: ########################################################
2348: ########################################################
2349: sub score_stats {
2350: my ($Sections,$enrollment,$symbs,$starttime,$endtime,$courseid)=@_;
2351: if (! defined($courseid)) {
2352: $courseid = $ENV{'request.course.id'};
2353: }
2354: #
2355: &setup_table_names($courseid);
2356: my $dbh = &Apache::lonmysql::get_dbh();
2357: #
2358: my ($section_limits,$enrollment_limits)=
2359: &limit_by_section_and_status($Sections,$enrollment,'b');
2360: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
2361: my @Symbids = map { &get_symb_id($_); } @{$symbs};
2362: #
2363: my $stats_table = $courseid.'_problem_stats';
2364: my $symb_restriction = join(' OR ',map {'a.symb_id='.$_;} @Symbids);
2365: my $request = 'DROP TABLE '.$stats_table;
2366: $dbh->do($request);
2367: $request =
2368: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
2369: 'SELECT a.student_id,'.
2370: 'SUM(a.awarded*w.weight) AS score FROM '.
2371: $performance_table.' AS a '.
2372: 'NATURAL LEFT JOIN '.$weight_table.' AS w '.
2373: 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.
2374: 'WHERE ('.$symb_restriction.')';
2375: if ($time_limits) {
2376: $request .= ' AND '.$time_limits;
2377: }
2378: if ($section_limits) {
2379: $request .= ' AND '.$section_limits;
2380: }
2381: if ($enrollment_limits) {
2382: $request .= ' AND '.$enrollment_limits;
2383: }
2384: $request .= ' GROUP BY a.student_id';
2385: # &Apache::lonnet::logthis('request = '.$/.$request);
2386: my $sth = $dbh->prepare($request);
2387: $sth->execute();
2388: $request =
2389: 'SELECT AVG(score),STD(score),MAX(score),MIN(score),COUNT(score) '.
2390: 'FROM '.$stats_table;
2391: my ($ave,$std,$max,$min,$count) = &execute_SQL_request($dbh,$request);
2392: # &Apache::lonnet::logthis('request = '.$/.$request);
2393:
2394: $request = 'SELECT SUM(weight) FROM '.$weight_table.
2395: ' WHERE ('.$symb_restriction.')';
2396: my ($max_possible) = &execute_SQL_request($dbh,$request);
2397: # &Apache::lonnet::logthis('request = '.$/.$request);
2398: return($min,$max,$ave,$std,$count,$max_possible);
2399: }
2400:
2401:
2402: ########################################################
2403: ########################################################
2404:
2405: =pod
2406:
2407: =item &count_stats
2408:
2409: Inputs: $Sections, $enrollment, $symbs, $starttime,
2410: $endtime, $courseid
2411:
2412: $Sections, $enrollment, $starttime, $endtime, and $courseid are the same as
2413: elsewhere in this module.
2414: $symbs is an array ref of symbs
2415:
2416: Returns: minimum, maximum, mean, s.d., and number of students
2417: of the number of items correct on the given resources
2418:
2419: =cut
2420:
2421: ########################################################
2422: ########################################################
2423: sub count_stats {
2424: my ($Sections,$enrollment,$symbs,$starttime,$endtime,$courseid)=@_;
2425: if (! defined($courseid)) {
2426: $courseid = $ENV{'request.course.id'};
2427: }
2428: #
2429: &setup_table_names($courseid);
2430: my $dbh = &Apache::lonmysql::get_dbh();
2431: #
2432: my ($section_limits,$enrollment_limits)=
2433: &limit_by_section_and_status($Sections,$enrollment,'b');
2434: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
2435: my @Symbids = map { &get_symb_id($_); } @{$symbs};
2436: #
2437: my $stats_table = $courseid.'_problem_stats';
2438: my $symb_restriction = join(' OR ',map {'a.symb_id='.$_;} @Symbids);
2439: my $request = 'DROP TABLE '.$stats_table;
2440: $dbh->do($request);
2441: $request =
2442: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
2443: 'SELECT a.student_id,'.
2444: 'COUNT(a.award) AS count FROM '.
2445: $performance_table.' AS a '.
2446: 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.
2447: 'WHERE ('.$symb_restriction.')'.
2448: " AND a.award!='INCORRECT_ATTEMPTED'";
2449: if ($time_limits) {
2450: $request .= ' AND '.$time_limits;
2451: }
2452: if ($section_limits) {
2453: $request .= ' AND '.$section_limits;
2454: }
2455: if ($enrollment_limits) {
2456: $request .= ' AND '.$enrollment_limits;
2457: }
2458: $request .= ' GROUP BY a.student_id';
2459: # &Apache::lonnet::logthis('request = '.$/.$request);
2460: my $sth = $dbh->prepare($request);
2461: $sth->execute();
2462: $request =
2463: 'SELECT AVG(count),STD(count),MAX(count),MIN(count),COUNT(count) '.
2464: 'FROM '.$stats_table;
2465: my ($ave,$std,$max,$min,$count) = &execute_SQL_request($dbh,$request);
2466: # &Apache::lonnet::logthis('request = '.$/.$request);
2467: return($min,$max,$ave,$std,$count);
2468: }
2469:
2470: ######################################################
2471: ######################################################
2472:
2473: =pod
2474:
2475: =item get_student_data
2476:
2477: =cut
2478:
2479: ######################################################
2480: ######################################################
2481: sub get_student_data {
2482: my ($students,$courseid) = @_;
2483: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2484: &setup_table_names($courseid);
2485: my $dbh = &Apache::lonmysql::get_dbh();
2486: return undef if (! defined($dbh));
2487: my $request = 'SELECT '.
2488: 'student_id, student '.
2489: 'FROM '.$student_table;
2490: if (defined($students)) {
2491: $request .= ' WHERE ('.
2492: join(' OR ', map {'student_id='.
2493: &get_student_id($_->{'username'},
2494: $_->{'domain'})
2495: } @$students
2496: ).')';
2497: }
2498: $request.= ' ORDER BY student_id';
2499: my $sth = $dbh->prepare($request);
2500: $sth->execute();
2501: if ($dbh->err) {
2502: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2503: return undef;
2504: }
2505: my $dataset = $sth->fetchall_arrayref();
2506: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2507: return $dataset;
2508: }
2509: }
2510:
2511: sub RD_student_id { return 0; }
2512: sub RD_awarddetail { return 1; }
2513: sub RD_response_eval { return 2; }
2514: sub RD_submission { return 3; }
2515: sub RD_timestamp { return 4; }
2516: sub RD_tries { return 5; }
2517: sub RD_sname { return 6; }
2518:
2519: sub get_response_data {
2520: my ($Sections,$enrollment,$symb,$response,$courseid) = @_;
2521: return undef if (! defined($symb) ||
2522: ! defined($response));
2523: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2524: #
2525: &setup_table_names($courseid);
2526: my $symb_id = &get_symb_id($symb);
2527: my $response_id = &get_part_id($response);
2528: #
2529: my $dbh = &Apache::lonmysql::get_dbh();
2530: return undef if (! defined($dbh));
2531: #
2532: my ($student_requirements,$enrollment_requirements) =
2533: &limit_by_section_and_status($Sections,$enrollment,'d');
2534: my $request = 'SELECT '.
2535: 'a.student_id, a.awarddetail, a.response_specific_value, '.
2536: 'a.submission, b.timestamp, c.tries, d.student '.
2537: 'FROM '.$fulldump_response_table.' AS a '.
2538: 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2539: 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2540: 'a.transaction = b.transaction '.
2541: 'LEFT JOIN '.$fulldump_part_table.' AS c '.
2542: 'ON a.symb_id=c.symb_id AND a.student_id=c.student_id AND '.
2543: 'a.part_id=c.part_id AND a.transaction = c.transaction '.
2544: 'LEFT JOIN '.$student_table.' AS d '.
2545: 'ON a.student_id=d.student_id '.
2546: 'WHERE '.
2547: 'a.symb_id='.$symb_id.' AND a.response_id='.$response_id;
2548: if (defined($student_requirements) || defined($enrollment_requirements)) {
2549: $request .= ' AND ';
2550: if (defined($student_requirements)) {
2551: $request .= $student_requirements.' AND ';
2552: }
2553: if (defined($enrollment_requirements)) {
2554: $request .= $enrollment_requirements.' AND ';
2555: }
2556: $request =~ s/( AND )$//;
2557: }
2558: $request .= ' ORDER BY b.timestamp';
2559: # &Apache::lonnet::logthis("request =\n".$request);
2560: my $sth = $dbh->prepare($request);
2561: $sth->execute();
2562: if ($dbh->err) {
2563: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2564: return undef;
2565: }
2566: my $dataset = $sth->fetchall_arrayref();
2567: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2568: # Clear the \'s from around the submission
2569: for (my $i =0;$i<scalar(@$dataset);$i++) {
2570: $dataset->[$i]->[3] =~ s/(\'$|^\')//g;
2571: }
2572: return $dataset;
2573: }
2574: }
2575:
2576:
2577: sub RDs_awarddetail { return 3; }
2578: sub RDs_submission { return 2; }
2579: sub RDs_timestamp { return 1; }
2580: sub RDs_tries { return 0; }
2581: sub RDs_awarded { return 4; }
2582:
2583: sub get_response_data_by_student {
2584: my ($student,$symb,$response,$courseid) = @_;
2585: return undef if (! defined($symb) ||
2586: ! defined($response));
2587: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2588: #
2589: &setup_table_names($courseid);
2590: my $symb_id = &get_symb_id($symb);
2591: my $response_id = &get_part_id($response);
2592: #
2593: my $student_id = &get_student_id($student->{'username'},
2594: $student->{'domain'});
2595: #
2596: my $dbh = &Apache::lonmysql::get_dbh();
2597: return undef if (! defined($dbh));
2598: my $request = 'SELECT '.
2599: 'c.tries, b.timestamp, a.submission, a.awarddetail, e.awarded '.
2600: 'FROM '.$fulldump_response_table.' AS a '.
2601: 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2602: 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2603: 'a.transaction = b.transaction '.
2604: 'LEFT JOIN '.$fulldump_part_table.' AS c '.
2605: 'ON a.symb_id=c.symb_id AND a.student_id=c.student_id AND '.
2606: 'a.part_id=c.part_id AND a.transaction = c.transaction '.
2607: 'LEFT JOIN '.$student_table.' AS d '.
2608: 'ON a.student_id=d.student_id '.
2609: 'LEFT JOIN '.$performance_table.' AS e '.
2610: 'ON a.symb_id=e.symb_id AND a.part_id=e.part_id AND '.
2611: 'a.student_id=e.student_id AND c.tries=e.tries '.
2612: 'WHERE '.
2613: 'a.symb_id='.$symb_id.' AND a.response_id='.$response_id.
2614: ' AND a.student_id='.$student_id.' ORDER BY b.timestamp';
2615: # &Apache::lonnet::logthis("request =\n".$request);
2616: my $sth = $dbh->prepare($request);
2617: $sth->execute();
2618: if ($dbh->err) {
2619: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2620: return undef;
2621: }
2622: my $dataset = $sth->fetchall_arrayref();
2623: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2624: # Clear the \'s from around the submission
2625: for (my $i =0;$i<scalar(@$dataset);$i++) {
2626: $dataset->[$i]->[2] =~ s/(\'$|^\')//g;
2627: }
2628: return $dataset;
2629: }
2630: return undef; # error occurred
2631: }
2632:
2633: sub RT_student_id { return 0; }
2634: sub RT_awarded { return 1; }
2635: sub RT_tries { return 2; }
2636: sub RT_timestamp { return 3; }
2637:
2638: sub get_response_time_data {
2639: my ($students,$symb,$part,$courseid) = @_;
2640: return undef if (! defined($symb) ||
2641: ! defined($part));
2642: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2643: #
2644: &setup_table_names($courseid);
2645: my $symb_id = &get_symb_id($symb);
2646: my $part_id = &get_part_id($part);
2647: #
2648: my $dbh = &Apache::lonmysql::get_dbh();
2649: return undef if (! defined($dbh));
2650: my $request = 'SELECT '.
2651: 'a.student_id, a.awarded, a.tries, b.timestamp '.
2652: 'FROM '.$fulldump_part_table.' AS a '.
2653: 'NATURAL LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2654: # 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2655: # 'a.transaction = b.transaction '.
2656: 'WHERE '.
2657: 'a.symb_id='.$symb_id.' AND a.part_id='.$part_id;
2658: if (defined($students)) {
2659: $request .= ' AND ('.
2660: join(' OR ', map {'a.student_id='.
2661: &get_student_id($_->{'username'},
2662: $_->{'domain'})
2663: } @$students
2664: ).')';
2665: }
2666: $request .= ' ORDER BY b.timestamp';
2667: # &Apache::lonnet::logthis("request =\n".$request);
2668: my $sth = $dbh->prepare($request);
2669: $sth->execute();
2670: if ($dbh->err) {
2671: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2672: return undef;
2673: }
2674: my $dataset = $sth->fetchall_arrayref();
2675: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2676: return $dataset;
2677: }
2678:
2679: }
2680:
2681: ################################################
2682: ################################################
2683:
2684: =pod
2685:
2686: =item &get_student_scores($Sections,$Symbs,$enrollment,$courseid)
2687:
2688: =cut
2689:
2690: ################################################
2691: ################################################
2692: sub get_student_scores {
2693: my ($Sections,$Symbs,$enrollment,$courseid,$starttime,$endtime) = @_;
2694: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2695: &setup_table_names($courseid);
2696: my $dbh = &Apache::lonmysql::get_dbh();
2697: return (undef) if (! defined($dbh));
2698: my $tmptable = $courseid.'_temp_'.time;
2699: #
2700: my $symb_requirements;
2701: if (defined($Symbs) && @$Symbs) {
2702: $symb_requirements = '('.
2703: join(' OR ', map{ "(a.symb_id='".&get_symb_id($_->{'symb'}).
2704: "' AND a.part_id='".&get_part_id($_->{'part'}).
2705: "')"
2706: } @$Symbs).')';
2707: }
2708: #
2709: my $student_requirements;
2710: if ( (defined($Sections) && $Sections->[0] ne 'all')) {
2711: $student_requirements = '('.
2712: join(' OR ', map { "b.section='".$_."'" } @$Sections
2713: ).')';
2714: }
2715: #
2716: my $enrollment_requirements=undef;
2717: if (defined($enrollment) && $enrollment ne 'Any') {
2718: $enrollment_requirements = "b.status='".$enrollment."'";
2719: }
2720: #
2721: my $time_requirements = undef;
2722: if (defined($starttime)) {
2723: $time_requirements .= "a.timestamp>='".$starttime."'";
2724: if (defined($endtime)) {
2725: $time_requirements .= " AND a.timestamp<='".$endtime."'";
2726: }
2727: } elsif (defined($endtime)) {
2728: $time_requirements .= "a.timestamp<='".$endtime."'";
2729: }
2730: ##
2731: ##
2732: my $request = 'CREATE TEMPORARY TABLE IF NOT EXISTS '.$tmptable.
2733: ' SELECT a.student_id,SUM(a.awarded) AS score FROM '.
2734: $performance_table.' AS a ';
2735: if (defined($student_requirements) || defined($enrollment_requirements)) {
2736: $request .= ' NATURAL LEFT JOIN '.$student_table.' AS b ';
2737: }
2738: if (defined($symb_requirements) ||
2739: defined($student_requirements) ||
2740: defined($enrollment_requirements) ) {
2741: $request .= ' WHERE ';
2742: }
2743: if (defined($symb_requirements)) {
2744: $request .= $symb_requirements.' AND ';
2745: }
2746: if (defined($student_requirements)) {
2747: $request .= $student_requirements.' AND ';
2748: }
2749: if (defined($enrollment_requirements)) {
2750: $request .= $enrollment_requirements.' AND ';
2751: }
2752: if (defined($time_requirements)) {
2753: $request .= $time_requirements.' AND ';
2754: }
2755: $request =~ s/ AND $//; # Strip of the trailing ' AND '.
2756: $request .= ' GROUP BY a.student_id';
2757: # &Apache::lonnet::logthis("request = \n".$request);
2758: my $sth = $dbh->prepare($request);
2759: $sth->execute();
2760: if ($dbh->err) {
2761: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2762: return undef;
2763: }
2764: $request = 'SELECT score,COUNT(*) FROM '.$tmptable.' GROUP BY score';
2765: # &Apache::lonnet::logthis("request = \n".$request);
2766: $sth = $dbh->prepare($request);
2767: $sth->execute();
2768: if ($dbh->err) {
2769: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2770: return undef;
2771: }
2772: my $dataset = $sth->fetchall_arrayref();
2773: return $dataset;
2774: }
2775:
2776: ################################################
2777: ################################################
2778:
2779: =pod
2780:
2781: =item &setup_table_names()
2782:
2783: input: course id
2784:
2785: output: none
2786:
2787: Cleans up the package variables for local caching.
2788:
2789: =cut
2790:
2791: ################################################
2792: ################################################
2793: sub setup_table_names {
2794: my ($courseid) = @_;
2795: if (! defined($courseid)) {
2796: $courseid = $ENV{'request.course.id'};
2797: }
2798: #
2799: if (! defined($current_course) || $current_course ne $courseid) {
2800: # Clear out variables
2801: $have_read_part_table = 0;
2802: undef(%ids_by_part);
2803: undef(%parts_by_id);
2804: $have_read_symb_table = 0;
2805: undef(%ids_by_symb);
2806: undef(%symbs_by_id);
2807: $have_read_student_table = 0;
2808: undef(%ids_by_student);
2809: undef(%students_by_id);
2810: #
2811: $current_course = $courseid;
2812: }
2813: #
2814: # Set up database names
2815: my $base_id = $courseid;
2816: $symb_table = $base_id.'_'.'symb';
2817: $part_table = $base_id.'_'.'part';
2818: $student_table = $base_id.'_'.'student';
2819: $performance_table = $base_id.'_'.'performance';
2820: $parameters_table = $base_id.'_'.'parameters';
2821: $fulldump_part_table = $base_id.'_'.'partdata';
2822: $fulldump_response_table = $base_id.'_'.'responsedata';
2823: $fulldump_timestamp_table = $base_id.'_'.'timestampdata';
2824: $weight_table = $base_id.'_'.'weight';
2825: #
2826: @Tables = (
2827: $symb_table,
2828: $part_table,
2829: $student_table,
2830: $performance_table,
2831: $parameters_table,
2832: $fulldump_part_table,
2833: $fulldump_response_table,
2834: $fulldump_timestamp_table,
2835: $weight_table,
2836: );
2837: return;
2838: }
2839:
2840: ################################################
2841: ################################################
2842:
2843: =pod
2844:
2845: =back
2846:
2847: =item End of Local Data Caching Subroutines
2848:
2849: =cut
2850:
2851: ################################################
2852: ################################################
2853:
2854: } # End scope of table identifiers
2855:
2856: ################################################
2857: ################################################
2858:
2859: =pod
2860:
2861: =head3 Classlist Subroutines
2862:
2863: =item &get_classlist();
2864:
2865: Retrieve the classist of a given class or of the current class. Student
2866: information is returned from the classlist.db file and, if needed,
2867: from the students environment.
2868:
2869: Optional arguments are $cid, $cdom, and $cnum (course id, course domain,
2870: and course number, respectively). Any omitted arguments will be taken
2871: from the current environment ($ENV{'request.course.id'},
2872: $ENV{'course.'.$cid.'.domain'}, and $ENV{'course.'.$cid.'.num'}).
2873:
2874: Returns a reference to a hash which contains:
2875: keys '$sname:$sdom'
2876: values [$sdom,$sname,$end,$start,$id,$section,$fullname,$status,$type]
2877:
2878: The constant values CL_SDOM, CL_SNAME, CL_END, etc. can be used
2879: as indices into the returned list to future-proof clients against
2880: changes in the list order.
2881:
2882: =cut
2883:
2884: ################################################
2885: ################################################
2886:
2887: sub CL_SDOM { return 0; }
2888: sub CL_SNAME { return 1; }
2889: sub CL_END { return 2; }
2890: sub CL_START { return 3; }
2891: sub CL_ID { return 4; }
2892: sub CL_SECTION { return 5; }
2893: sub CL_FULLNAME { return 6; }
2894: sub CL_STATUS { return 7; }
2895: sub CL_TYPE { return 8; }
2896:
2897: sub get_classlist {
2898: my ($cid,$cdom,$cnum) = @_;
2899: $cid = $cid || $ENV{'request.course.id'};
2900: $cdom = $cdom || $ENV{'course.'.$cid.'.domain'};
2901: $cnum = $cnum || $ENV{'course.'.$cid.'.num'};
2902: my $now = time;
2903: #
2904: my %classlist=&Apache::lonnet::dump('classlist',$cdom,$cnum);
2905: while (my ($student,$info) = each(%classlist)) {
2906: if ($student =~ /^(con_lost|error|no_such_host)/i) {
2907: &Apache::lonnet::logthis('get_classlist error for '.$cid.':'.$student);
2908: return undef;
2909: }
2910: my ($sname,$sdom) = split(/:/,$student);
2911: my @Values = split(/:/,$info);
2912: my ($end,$start,$id,$section,$fullname,$type);
2913: if (@Values > 2) {
2914: ($end,$start,$id,$section,$fullname,$type) = @Values;
2915: } else { # We have to get the data ourselves
2916: ($end,$start) = @Values;
2917: $section = &Apache::lonnet::getsection($sdom,$sname,$cid);
2918: my %info=&Apache::lonnet::get('environment',
2919: ['firstname','middlename',
2920: 'lastname','generation','id'],
2921: $sdom, $sname);
2922: my ($tmp) = keys(%info);
2923: if ($tmp =~/^(con_lost|error|no_such_host)/i) {
2924: $fullname = 'not available';
2925: $id = 'not available';
2926: &Apache::lonnet::logthis('unable to retrieve environment '.
2927: 'for '.$sname.':'.$sdom);
2928: } else {
2929: $fullname = &ProcessFullName(@info{qw/lastname generation
2930: firstname middlename/});
2931: $id = $info{'id'};
2932: }
2933: # Update the classlist with this students information
2934: if ($fullname ne 'not available') {
2935: my $enrolldata = join(':',$end,$start,$id,$section,$fullname);
2936: my $reply=&Apache::lonnet::cput('classlist',
2937: {$student => $enrolldata},
2938: $cdom,$cnum);
2939: if ($reply !~ /^(ok|delayed)/) {
2940: &Apache::lonnet::logthis('Unable to update classlist for '.
2941: 'student '.$sname.':'.$sdom.
2942: ' error:'.$reply);
2943: }
2944: }
2945: }
2946: my $status='Expired';
2947: if(((!$end) || $now < $end) && ((!$start) || ($now > $start))) {
2948: $status='Active';
2949: }
2950: $classlist{$student} =
2951: [$sdom,$sname,$end,$start,$id,$section,$fullname,$status,$type];
2952: }
2953: if (wantarray()) {
2954: return (\%classlist,['domain','username','end','start','id',
2955: 'section','fullname','status','type']);
2956: } else {
2957: return \%classlist;
2958: }
2959: }
2960:
2961: # ----- END HELPER FUNCTIONS --------------------------------------------
2962:
2963: 1;
2964: __END__
2965:
2966:
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