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loncoursedata.pm
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Fri Jun 4 17:46:10 2004 UTC (20 years ago) by
matthew
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CVS tags:
version_1_1_99_0,
HEAD
&init_dbs now takes a parameter, $drop, which indicates if the system
should drop all the cache tables before trying to recreate them. Modified
&populate_student_table to call &init_dbs with $drop = 0. Modified
&ensure_tables_are_set_up to call &init_dbs with $drop = 1. This means that
additions to the student table will not cause the caches to be cleared, but
the lack of any single table in a cache set will cause all the remaining
tables to be dropped and recreated.
1: # The LearningOnline Network with CAPA
2: #
3: # $Id: loncoursedata.pm,v 1.134 2004/06/04 17:46:10 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,$drop) = @_;
551: &setup_table_names($courseid);
552: #
553: # Drop any of the existing tables
554: if ($drop) {
555: foreach my $table (@Tables) {
556: &Apache::lonmysql::drop_table($table);
557: }
558: }
559: #
560: # Note - changes to this table must be reflected in the code that
561: # stores the data (calls &Apache::lonmysql::store_row with this table
562: # id
563: my $symb_table_def = {
564: id => $symb_table,
565: permanent => 'no',
566: columns => [{ name => 'symb_id',
567: type => 'MEDIUMINT UNSIGNED',
568: restrictions => 'NOT NULL',
569: auto_inc => 'yes', },
570: { name => 'symb',
571: type => 'MEDIUMTEXT',
572: restrictions => 'NOT NULL'},
573: ],
574: 'PRIMARY KEY' => ['symb_id'],
575: };
576: #
577: my $part_table_def = {
578: id => $part_table,
579: permanent => 'no',
580: columns => [{ name => 'part_id',
581: type => 'MEDIUMINT UNSIGNED',
582: restrictions => 'NOT NULL',
583: auto_inc => 'yes', },
584: { name => 'part',
585: type => 'VARCHAR(100) BINARY',
586: restrictions => 'NOT NULL'},
587: ],
588: 'PRIMARY KEY' => ['part (100)'],
589: 'KEY' => [{ columns => ['part_id']},],
590: };
591: #
592: my $student_table_def = {
593: id => $student_table,
594: permanent => 'no',
595: columns => [{ name => 'student_id',
596: type => 'MEDIUMINT UNSIGNED',
597: restrictions => 'NOT NULL',
598: auto_inc => 'yes', },
599: { name => 'student',
600: type => 'VARCHAR(100) BINARY',
601: restrictions => 'NOT NULL UNIQUE'},
602: { name => 'section',
603: type => 'VARCHAR(100) BINARY',
604: restrictions => 'NOT NULL'},
605: { name => 'status',
606: type => 'VARCHAR(15) BINARY',
607: restrictions => 'NOT NULL'},
608: { name => 'classification',
609: type => 'VARCHAR(100) BINARY', },
610: { name => 'updatetime',
611: type => 'INT UNSIGNED'},
612: { name => 'fullupdatetime',
613: type => 'INT UNSIGNED'},
614: ],
615: 'PRIMARY KEY' => ['student_id'],
616: 'KEY' => [{ columns => ['student (100)',
617: 'section (100)',
618: 'status (15)',]},],
619: };
620: #
621: my $performance_table_def = {
622: id => $performance_table,
623: permanent => 'no',
624: columns => [{ name => 'symb_id',
625: type => 'MEDIUMINT UNSIGNED',
626: restrictions => 'NOT NULL' },
627: { name => 'student_id',
628: type => 'MEDIUMINT UNSIGNED',
629: restrictions => 'NOT NULL' },
630: { name => 'part_id',
631: type => 'MEDIUMINT UNSIGNED',
632: restrictions => 'NOT NULL' },
633: { name => 'part',
634: type => 'VARCHAR(100) BINARY',
635: restrictions => 'NOT NULL'},
636: { name => 'solved',
637: type => 'TINYTEXT' },
638: { name => 'tries',
639: type => 'SMALLINT UNSIGNED' },
640: { name => 'awarded',
641: type => 'REAL' },
642: { name => 'award',
643: type => 'TINYTEXT' },
644: { name => 'awarddetail',
645: type => 'TINYTEXT' },
646: { name => 'timestamp',
647: type => 'INT UNSIGNED'},
648: ],
649: 'PRIMARY KEY' => ['symb_id','student_id','part_id'],
650: 'KEY' => [{ columns=>['student_id'] },
651: { columns=>['symb_id'] },],
652: };
653: #
654: my $fulldump_part_table_def = {
655: id => $fulldump_part_table,
656: permanent => 'no',
657: columns => [
658: { name => 'symb_id',
659: type => 'MEDIUMINT UNSIGNED',
660: restrictions => 'NOT NULL' },
661: { name => 'part_id',
662: type => 'MEDIUMINT UNSIGNED',
663: restrictions => 'NOT NULL' },
664: { name => 'student_id',
665: type => 'MEDIUMINT UNSIGNED',
666: restrictions => 'NOT NULL' },
667: { name => 'transaction',
668: type => 'MEDIUMINT UNSIGNED',
669: restrictions => 'NOT NULL' },
670: { name => 'tries',
671: type => 'SMALLINT UNSIGNED',
672: restrictions => 'NOT NULL' },
673: { name => 'award',
674: type => 'TINYTEXT' },
675: { name => 'awarded',
676: type => 'REAL' },
677: { name => 'previous',
678: type => 'SMALLINT UNSIGNED' },
679: # { name => 'regrader',
680: # type => 'TINYTEXT' },
681: # { name => 'afterduedate',
682: # type => 'TINYTEXT' },
683: ],
684: 'PRIMARY KEY' => ['symb_id','part_id','student_id','transaction'],
685: 'KEY' => [
686: { columns=>['symb_id'] },
687: { columns=>['part_id'] },
688: { columns=>['student_id'] },
689: ],
690: };
691: #
692: my $fulldump_response_table_def = {
693: id => $fulldump_response_table,
694: permanent => 'no',
695: columns => [
696: { name => 'symb_id',
697: type => 'MEDIUMINT UNSIGNED',
698: restrictions => 'NOT NULL' },
699: { name => 'part_id',
700: type => 'MEDIUMINT UNSIGNED',
701: restrictions => 'NOT NULL' },
702: { name => 'response_id',
703: type => 'MEDIUMINT UNSIGNED',
704: restrictions => 'NOT NULL' },
705: { name => 'student_id',
706: type => 'MEDIUMINT UNSIGNED',
707: restrictions => 'NOT NULL' },
708: { name => 'transaction',
709: type => 'MEDIUMINT UNSIGNED',
710: restrictions => 'NOT NULL' },
711: { name => 'awarddetail',
712: type => 'TINYTEXT' },
713: # { name => 'message',
714: # type => 'CHAR BINARY'},
715: { name => 'response_specific',
716: type => 'TINYTEXT' },
717: { name => 'response_specific_value',
718: type => 'TINYTEXT' },
719: { name => 'submission',
720: type => 'TEXT'},
721: ],
722: 'PRIMARY KEY' => ['symb_id','part_id','response_id','student_id',
723: 'transaction'],
724: 'KEY' => [
725: { columns=>['symb_id'] },
726: { columns=>['part_id','response_id'] },
727: { columns=>['student_id'] },
728: ],
729: };
730: my $fulldump_timestamp_table_def = {
731: id => $fulldump_timestamp_table,
732: permanent => 'no',
733: columns => [
734: { name => 'symb_id',
735: type => 'MEDIUMINT UNSIGNED',
736: restrictions => 'NOT NULL' },
737: { name => 'student_id',
738: type => 'MEDIUMINT UNSIGNED',
739: restrictions => 'NOT NULL' },
740: { name => 'transaction',
741: type => 'MEDIUMINT UNSIGNED',
742: restrictions => 'NOT NULL' },
743: { name => 'timestamp',
744: type => 'INT UNSIGNED'},
745: ],
746: 'PRIMARY KEY' => ['symb_id','student_id','transaction'],
747: 'KEY' => [
748: { columns=>['symb_id'] },
749: { columns=>['student_id'] },
750: { columns=>['transaction'] },
751: ],
752: };
753: #
754: my $parameters_table_def = {
755: id => $parameters_table,
756: permanent => 'no',
757: columns => [{ name => 'symb_id',
758: type => 'MEDIUMINT UNSIGNED',
759: restrictions => 'NOT NULL' },
760: { name => 'student_id',
761: type => 'MEDIUMINT UNSIGNED',
762: restrictions => 'NOT NULL' },
763: { name => 'parameter',
764: type => 'TINYTEXT',
765: restrictions => 'NOT NULL' },
766: { name => 'value',
767: type => 'MEDIUMTEXT' },
768: ],
769: 'PRIMARY KEY' => ['symb_id','student_id','parameter (255)'],
770: };
771: #
772: my $weight_table_def = {
773: id => $weight_table,
774: permanent => 'no',
775: columns => [{ name => 'symb_id',
776: type => 'MEDIUMINT UNSIGNED',
777: restrictions => 'NOT NULL' },
778: { name => 'part_id',
779: type => 'MEDIUMINT UNSIGNED',
780: restrictions => 'NOT NULL' },
781: { name => 'weight',
782: type => 'REAL',
783: restrictions => 'NOT NULL' },
784: ],
785: 'PRIMARY KEY' => ['symb_id','part_id'],
786: };
787: #
788: # Create the tables
789: my $tableid;
790: $tableid = &Apache::lonmysql::create_table($symb_table_def);
791: if (! defined($tableid)) {
792: &Apache::lonnet::logthis("error creating symb_table: ".
793: &Apache::lonmysql::get_error());
794: return 1;
795: }
796: #
797: $tableid = &Apache::lonmysql::create_table($part_table_def);
798: if (! defined($tableid)) {
799: &Apache::lonnet::logthis("error creating part_table: ".
800: &Apache::lonmysql::get_error());
801: return 2;
802: }
803: #
804: $tableid = &Apache::lonmysql::create_table($student_table_def);
805: if (! defined($tableid)) {
806: &Apache::lonnet::logthis("error creating student_table: ".
807: &Apache::lonmysql::get_error());
808: return 3;
809: }
810: #
811: $tableid = &Apache::lonmysql::create_table($performance_table_def);
812: if (! defined($tableid)) {
813: &Apache::lonnet::logthis("error creating preformance_table: ".
814: &Apache::lonmysql::get_error());
815: return 5;
816: }
817: #
818: $tableid = &Apache::lonmysql::create_table($parameters_table_def);
819: if (! defined($tableid)) {
820: &Apache::lonnet::logthis("error creating parameters_table: ".
821: &Apache::lonmysql::get_error());
822: return 6;
823: }
824: #
825: $tableid = &Apache::lonmysql::create_table($fulldump_part_table_def);
826: if (! defined($tableid)) {
827: &Apache::lonnet::logthis("error creating fulldump_part_table: ".
828: &Apache::lonmysql::get_error());
829: return 7;
830: }
831: #
832: $tableid = &Apache::lonmysql::create_table($fulldump_response_table_def);
833: if (! defined($tableid)) {
834: &Apache::lonnet::logthis("error creating fulldump_response_table: ".
835: &Apache::lonmysql::get_error());
836: return 8;
837: }
838: $tableid = &Apache::lonmysql::create_table($fulldump_timestamp_table_def);
839: if (! defined($tableid)) {
840: &Apache::lonnet::logthis("error creating fulldump_timestamp_table: ".
841: &Apache::lonmysql::get_error());
842: return 9;
843: }
844: $tableid = &Apache::lonmysql::create_table($weight_table_def);
845: if (! defined($tableid)) {
846: &Apache::lonnet::logthis("error creating weight_table: ".
847: &Apache::lonmysql::get_error());
848: return 10;
849: }
850: return 0;
851: }
852:
853: ################################################
854: ################################################
855:
856: =pod
857:
858: =item &delete_caches()
859:
860: =cut
861:
862: ################################################
863: ################################################
864: sub delete_caches {
865: my $courseid = shift;
866: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
867: #
868: &setup_table_names($courseid);
869: #
870: my $dbh = &Apache::lonmysql::get_dbh();
871: foreach my $table (@Tables) {
872: my $command = 'DROP TABLE '.$table.';';
873: $dbh->do($command);
874: if ($dbh->err) {
875: &Apache::lonnet::logthis($command.' resulted in error: '.$dbh->errstr);
876: }
877: }
878: return;
879: }
880:
881: ################################################
882: ################################################
883:
884: =pod
885:
886: =item &get_part_id()
887:
888: Get the MySQL id of a problem part string.
889:
890: Input: $part
891:
892: Output: undef on error, integer $part_id on success.
893:
894: =item &get_part()
895:
896: Get the string describing a part from the MySQL id of the problem part.
897:
898: Input: $part_id
899:
900: Output: undef on error, $part string on success.
901:
902: =cut
903:
904: ################################################
905: ################################################
906:
907: my $have_read_part_table = 0;
908: my %ids_by_part;
909: my %parts_by_id;
910:
911: sub get_part_id {
912: my ($part) = @_;
913: $part = 0 if (! defined($part));
914: if (! $have_read_part_table) {
915: my @Result = &Apache::lonmysql::get_rows($part_table);
916: foreach (@Result) {
917: $ids_by_part{$_->[1]}=$_->[0];
918: }
919: $have_read_part_table = 1;
920: }
921: if (! exists($ids_by_part{$part})) {
922: &Apache::lonmysql::store_row($part_table,[undef,$part]);
923: undef(%ids_by_part);
924: my @Result = &Apache::lonmysql::get_rows($part_table);
925: foreach (@Result) {
926: $ids_by_part{$_->[1]}=$_->[0];
927: }
928: }
929: return $ids_by_part{$part} if (exists($ids_by_part{$part}));
930: return undef; # error
931: }
932:
933: sub get_part {
934: my ($part_id) = @_;
935: if (! exists($parts_by_id{$part_id}) ||
936: ! defined($parts_by_id{$part_id}) ||
937: $parts_by_id{$part_id} eq '') {
938: my @Result = &Apache::lonmysql::get_rows($part_table);
939: foreach (@Result) {
940: $parts_by_id{$_->[0]}=$_->[1];
941: }
942: }
943: return $parts_by_id{$part_id} if(exists($parts_by_id{$part_id}));
944: return undef; # error
945: }
946:
947: ################################################
948: ################################################
949:
950: =pod
951:
952: =item &get_symb_id()
953:
954: Get the MySQL id of a symb.
955:
956: Input: $symb
957:
958: Output: undef on error, integer $symb_id on success.
959:
960: =item &get_symb()
961:
962: Get the symb associated with a MySQL symb_id.
963:
964: Input: $symb_id
965:
966: Output: undef on error, $symb on success.
967:
968: =cut
969:
970: ################################################
971: ################################################
972:
973: my $have_read_symb_table = 0;
974: my %ids_by_symb;
975: my %symbs_by_id;
976:
977: sub get_symb_id {
978: my ($symb) = @_;
979: if (! $have_read_symb_table) {
980: my @Result = &Apache::lonmysql::get_rows($symb_table);
981: foreach (@Result) {
982: $ids_by_symb{$_->[1]}=$_->[0];
983: }
984: $have_read_symb_table = 1;
985: }
986: if (! exists($ids_by_symb{$symb})) {
987: &Apache::lonmysql::store_row($symb_table,[undef,$symb]);
988: undef(%ids_by_symb);
989: my @Result = &Apache::lonmysql::get_rows($symb_table);
990: foreach (@Result) {
991: $ids_by_symb{$_->[1]}=$_->[0];
992: }
993: }
994: return $ids_by_symb{$symb} if(exists( $ids_by_symb{$symb}));
995: return undef; # error
996: }
997:
998: sub get_symb {
999: my ($symb_id) = @_;
1000: if (! exists($symbs_by_id{$symb_id}) ||
1001: ! defined($symbs_by_id{$symb_id}) ||
1002: $symbs_by_id{$symb_id} eq '') {
1003: my @Result = &Apache::lonmysql::get_rows($symb_table);
1004: foreach (@Result) {
1005: $symbs_by_id{$_->[0]}=$_->[1];
1006: }
1007: }
1008: return $symbs_by_id{$symb_id} if(exists( $symbs_by_id{$symb_id}));
1009: return undef; # error
1010: }
1011:
1012: ################################################
1013: ################################################
1014:
1015: =pod
1016:
1017: =item &get_student_id()
1018:
1019: Get the MySQL id of a student.
1020:
1021: Input: $sname, $dom
1022:
1023: Output: undef on error, integer $student_id on success.
1024:
1025: =item &get_student()
1026:
1027: Get student username:domain associated with the MySQL student_id.
1028:
1029: Input: $student_id
1030:
1031: Output: undef on error, string $student (username:domain) on success.
1032:
1033: =cut
1034:
1035: ################################################
1036: ################################################
1037:
1038: my $have_read_student_table = 0;
1039: my %ids_by_student;
1040: my %students_by_id;
1041:
1042: sub get_student_id {
1043: my ($sname,$sdom) = @_;
1044: my $student = $sname.':'.$sdom;
1045: if (! $have_read_student_table) {
1046: my @Result = &Apache::lonmysql::get_rows($student_table);
1047: foreach (@Result) {
1048: $ids_by_student{$_->[1]}=$_->[0];
1049: }
1050: $have_read_student_table = 1;
1051: }
1052: if (! exists($ids_by_student{$student})) {
1053: &populate_student_table();
1054: undef(%ids_by_student);
1055: undef(%students_by_id);
1056: my @Result = &Apache::lonmysql::get_rows($student_table);
1057: foreach (@Result) {
1058: $ids_by_student{$_->[1]}=$_->[0];
1059: }
1060: }
1061: return $ids_by_student{$student} if(exists( $ids_by_student{$student}));
1062: return undef; # error
1063: }
1064:
1065: sub get_student {
1066: my ($student_id) = @_;
1067: if (! exists($students_by_id{$student_id}) ||
1068: ! defined($students_by_id{$student_id}) ||
1069: $students_by_id{$student_id} eq '') {
1070: my @Result = &Apache::lonmysql::get_rows($student_table);
1071: foreach (@Result) {
1072: $students_by_id{$_->[0]}=$_->[1];
1073: }
1074: }
1075: return $students_by_id{$student_id} if(exists($students_by_id{$student_id}));
1076: return undef; # error
1077: }
1078:
1079: sub populate_student_table {
1080: my ($courseid) = @_;
1081: if (! defined($courseid)) {
1082: $courseid = $ENV{'request.course.id'};
1083: }
1084: #
1085: &setup_table_names($courseid);
1086: &init_dbs($courseid,0);
1087: my $dbh = &Apache::lonmysql::get_dbh();
1088: my $request = 'INSERT IGNORE INTO '.$student_table.
1089: "(student,section,status) VALUES ";
1090: my $classlist = &get_classlist($courseid);
1091: my $student_count=0;
1092: while (my ($student,$data) = each %$classlist) {
1093: my ($section,$status) = ($data->[&CL_SECTION()],
1094: $data->[&CL_STATUS()]);
1095: if ($section eq '' || $section =~ /^\s*$/) {
1096: $section = 'none';
1097: }
1098: $request .= "('".$student."','".$section."','".$status."'),";
1099: $student_count++;
1100: }
1101: return if ($student_count == 0);
1102: chop($request);
1103: $dbh->do($request);
1104: if ($dbh->err()) {
1105: &Apache::lonnet::logthis("error ".$dbh->errstr().
1106: " occured executing \n".
1107: $request);
1108: }
1109: return;
1110: }
1111:
1112: ################################################
1113: ################################################
1114:
1115: =pod
1116:
1117: =item &clear_internal_caches()
1118:
1119: Causes the internal caches used in get_student_id, get_student,
1120: get_symb_id, get_symb, get_part_id, and get_part to be undef'd.
1121:
1122: Needs to be called before the first operation with the MySQL database
1123: for a given Apache request.
1124:
1125: =cut
1126:
1127: ################################################
1128: ################################################
1129: sub clear_internal_caches {
1130: $have_read_part_table = 0;
1131: undef(%ids_by_part);
1132: undef(%parts_by_id);
1133: $have_read_symb_table = 0;
1134: undef(%ids_by_symb);
1135: undef(%symbs_by_id);
1136: $have_read_student_table = 0;
1137: undef(%ids_by_student);
1138: undef(%students_by_id);
1139: }
1140:
1141:
1142: ################################################
1143: ################################################
1144:
1145: =pod
1146:
1147: =item &update_full_student_data($sname,$sdom,$courseid)
1148:
1149: Does a lonnet::dump on a student to populate the courses tables.
1150:
1151: Input: $sname, $sdom, $courseid
1152:
1153: Output: $returnstatus
1154:
1155: $returnstatus is a string describing any errors that occured. 'okay' is the
1156: default.
1157:
1158: This subroutine loads a students data using lonnet::dump and inserts
1159: it into the MySQL database. The inserts are done on three tables,
1160: $fulldump_response_table, $fulldump_part_table, and $fulldump_timestamp_table.
1161: The INSERT calls are made directly by this subroutine, not through lonmysql
1162: because we do a 'bulk'insert which takes advantage of MySQLs non-SQL
1163: compliant INSERT command to insert multiple rows at a time.
1164: If anything has gone wrong during this process, $returnstatus is updated with
1165: a description of the error.
1166:
1167: Once the "fulldump" tables are updated, the tables used for chart and
1168: spreadsheet (which hold only the current state of the student on their
1169: homework, not historical data) are updated. If all updates have occured
1170: successfully, $student_table is updated to reflect the time of the update.
1171:
1172: Notice we do not insert the data and immediately query it. This means it
1173: is possible for there to be data returned this first time that is not
1174: available the second time. CYA.
1175:
1176: =cut
1177:
1178: ################################################
1179: ################################################
1180: sub update_full_student_data {
1181: my ($sname,$sdom,$courseid) = @_;
1182: #
1183: # Set up database names
1184: &setup_table_names($courseid);
1185: #
1186: my $student_id = &get_student_id($sname,$sdom);
1187: my $student = $sname.':'.$sdom;
1188: #
1189: my $returnstatus = 'okay';
1190: #
1191: # Download students data
1192: my $time_of_retrieval = time;
1193: my @tmp = &Apache::lonnet::dump($courseid,$sdom,$sname);
1194: if (@tmp && $tmp[0] =~ /^error/) {
1195: $returnstatus = 'error retrieving full student data';
1196: return $returnstatus;
1197: } elsif (! @tmp) {
1198: $returnstatus = 'okay: no student data';
1199: return $returnstatus;
1200: }
1201: my %studentdata = @tmp;
1202: #
1203: # Get database handle and clean out the tables
1204: my $dbh = &Apache::lonmysql::get_dbh();
1205: $dbh->do('DELETE FROM '.$fulldump_response_table.' WHERE student_id='.
1206: $student_id);
1207: $dbh->do('DELETE FROM '.$fulldump_part_table.' WHERE student_id='.
1208: $student_id);
1209: $dbh->do('DELETE FROM '.$fulldump_timestamp_table.' WHERE student_id='.
1210: $student_id);
1211: #
1212: # Parse and store the data into a form we can handle
1213: my $partdata;
1214: my $respdata;
1215: while (my ($key,$value) = each(%studentdata)) {
1216: next if ($key =~ /^(\d+):(resource$|subnum$|keys:)/);
1217: my ($transaction,$symb,$parameter) = split(':',$key);
1218: my $symb_id = &get_symb_id($symb);
1219: if ($parameter eq 'timestamp') {
1220: # We can deal with 'timestamp' right away
1221: my @timestamp_storage = ($symb_id,$student_id,
1222: $transaction,$value);
1223: my $store_command = 'INSERT IGNORE INTO '.$fulldump_timestamp_table.
1224: " VALUES ('".join("','",@timestamp_storage)."');";
1225: $dbh->do($store_command);
1226: if ($dbh->err()) {
1227: &Apache::lonnet::logthis('unable to execute '.$store_command);
1228: &Apache::lonnet::logthis($dbh->errstr());
1229: }
1230: next;
1231: } elsif ($parameter eq 'version') {
1232: next;
1233: } elsif ($parameter =~ /^resource\.(.*)\.(tries|
1234: award|
1235: awarded|
1236: previous|
1237: solved|
1238: awarddetail|
1239: submission|
1240: submissiongrading|
1241: molecule)\s*$/x){
1242: # we do not have enough information to store an
1243: # entire row, so we save it up until later.
1244: my ($part_and_resp_id,$field) = ($1,$2);
1245: my ($part,$part_id,$resp,$resp_id);
1246: if ($part_and_resp_id =~ /\./) {
1247: ($part,$resp) = split(/\./,$part_and_resp_id);
1248: $part_id = &get_part_id($part);
1249: $resp_id = &get_part_id($resp);
1250: } else {
1251: $part_id = &get_part_id($part_and_resp_id);
1252: }
1253: # Deal with part specific data
1254: if ($field =~ /^(tries|award|awarded|previous)$/) {
1255: $partdata->{$symb_id}->{$part_id}->{$transaction}->{$field}=$value;
1256: }
1257: # deal with response specific data
1258: if (defined($resp_id) &&
1259: $field =~ /^(awarddetail|
1260: submission|
1261: submissiongrading|
1262: molecule)$/x) {
1263: if ($field eq 'submission') {
1264: # We have to be careful with user supplied input.
1265: # most of the time we are okay because it is escaped.
1266: # However, there is one wrinkle: submissions which end in
1267: # and odd number of '\' cause insert errors to occur.
1268: # Best trap this somehow...
1269: $value = $dbh->quote($value);
1270: }
1271: if ($field eq 'submissiongrading' ||
1272: $field eq 'molecule') {
1273: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific'}=$field;
1274: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific_value'}=$value;
1275: } else {
1276: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{$field}=$value;
1277: }
1278: }
1279: }
1280: }
1281: ##
1282: ## Store the part data
1283: my $store_command = 'INSERT IGNORE INTO '.$fulldump_part_table.
1284: ' VALUES '."\n";
1285: my $store_rows = 0;
1286: while (my ($symb_id,$hash1) = each (%$partdata)) {
1287: while (my ($part_id,$hash2) = each (%$hash1)) {
1288: while (my ($transaction,$data) = each (%$hash2)) {
1289: $store_command .= "('".join("','",$symb_id,$part_id,
1290: $student_id,
1291: $transaction,
1292: $data->{'tries'},
1293: $data->{'award'},
1294: $data->{'awarded'},
1295: $data->{'previous'})."'),";
1296: $store_rows++;
1297: }
1298: }
1299: }
1300: if ($store_rows) {
1301: chop($store_command);
1302: $dbh->do($store_command);
1303: if ($dbh->err) {
1304: $returnstatus = 'error storing part data';
1305: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
1306: &Apache::lonnet::logthis("While attempting\n".$store_command);
1307: }
1308: }
1309: ##
1310: ## Store the response data
1311: $store_command = 'INSERT IGNORE INTO '.$fulldump_response_table.
1312: ' VALUES '."\n";
1313: $store_rows = 0;
1314: while (my ($symb_id,$hash1) = each (%$respdata)) {
1315: while (my ($part_id,$hash2) = each (%$hash1)) {
1316: while (my ($resp_id,$hash3) = each (%$hash2)) {
1317: while (my ($transaction,$data) = each (%$hash3)) {
1318: my $submission = $data->{'submission'};
1319: # We have to be careful with user supplied input.
1320: # most of the time we are okay because it is escaped.
1321: # However, there is one wrinkle: submissions which end in
1322: # and odd number of '\' cause insert errors to occur.
1323: # Best trap this somehow...
1324: $submission = $dbh->quote($submission);
1325: $store_command .= "('".
1326: join("','",$symb_id,$part_id,
1327: $resp_id,$student_id,
1328: $transaction,
1329: $data->{'awarddetail'},
1330: $data->{'response_specific'},
1331: $data->{'response_specific_value'}).
1332: "',".$submission."),";
1333: $store_rows++;
1334: }
1335: }
1336: }
1337: }
1338: if ($store_rows) {
1339: chop($store_command);
1340: $dbh->do($store_command);
1341: if ($dbh->err) {
1342: $returnstatus = 'error storing response data';
1343: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
1344: &Apache::lonnet::logthis("While attempting\n".$store_command);
1345: }
1346: }
1347: ##
1348: ## Update the students "current" data in the performance
1349: ## and parameters tables.
1350: my ($status,undef) = &store_student_data
1351: ($sname,$sdom,$courseid,
1352: &Apache::lonnet::convert_dump_to_currentdump(\%studentdata));
1353: if ($returnstatus eq 'okay' && $status ne 'okay') {
1354: $returnstatus = 'error storing current data:'.$status;
1355: } elsif ($status ne 'okay') {
1356: $returnstatus .= ' error storing current data:'.$status;
1357: }
1358: ##
1359: ## Update the students time......
1360: if ($returnstatus eq 'okay') {
1361: &store_updatetime($student_id,$time_of_retrieval,$time_of_retrieval);
1362: if ($dbh->err) {
1363: if ($returnstatus eq 'okay') {
1364: $returnstatus = 'error updating student time';
1365: } else {
1366: $returnstatus = 'error updating student time';
1367: }
1368: }
1369: }
1370: return $returnstatus;
1371: }
1372:
1373: ################################################
1374: ################################################
1375:
1376: =pod
1377:
1378: =item &update_student_data()
1379:
1380: Input: $sname, $sdom, $courseid
1381:
1382: Output: $returnstatus, \%student_data
1383:
1384: $returnstatus is a string describing any errors that occured. 'okay' is the
1385: default.
1386: \%student_data is the data returned by a call to lonnet::currentdump.
1387:
1388: This subroutine loads a students data using lonnet::currentdump and inserts
1389: it into the MySQL database. The inserts are done on two tables,
1390: $performance_table and $parameters_table. $parameters_table holds the data
1391: that is not included in $performance_table. See the description of
1392: $performance_table elsewhere in this file. The INSERT calls are made
1393: directly by this subroutine, not through lonmysql because we do a 'bulk'
1394: insert which takes advantage of MySQLs non-SQL compliant INSERT command to
1395: insert multiple rows at a time. If anything has gone wrong during this
1396: process, $returnstatus is updated with a description of the error and
1397: \%student_data is returned.
1398:
1399: Notice we do not insert the data and immediately query it. This means it
1400: is possible for there to be data returned this first time that is not
1401: available the second time. CYA.
1402:
1403: =cut
1404:
1405: ################################################
1406: ################################################
1407: sub update_student_data {
1408: my ($sname,$sdom,$courseid) = @_;
1409: #
1410: # Set up database names
1411: &setup_table_names($courseid);
1412: #
1413: my $student_id = &get_student_id($sname,$sdom);
1414: my $student = $sname.':'.$sdom;
1415: #
1416: my $returnstatus = 'okay';
1417: #
1418: # Download students data
1419: my $time_of_retrieval = time;
1420: my @tmp = &Apache::lonnet::currentdump($courseid,$sdom,$sname);
1421: if ((scalar(@tmp) > 0) && ($tmp[0] =~ /^error:/)) {
1422: &Apache::lonnet::logthis('error getting data for '.
1423: $sname.':'.$sdom.' in course '.$courseid.
1424: ':'.$tmp[0]);
1425: $returnstatus = 'error getting data';
1426: return ($returnstatus,undef);
1427: }
1428: if (scalar(@tmp) < 1) {
1429: return ('no data',undef);
1430: }
1431: my %student_data = @tmp;
1432: my @Results = &store_student_data($sname,$sdom,$courseid,\%student_data);
1433: #
1434: # Set the students update time
1435: if ($Results[0] eq 'okay') {
1436: &store_updatetime($student_id,$time_of_retrieval,$time_of_retrieval);
1437: }
1438: #
1439: return @Results;
1440: }
1441:
1442: sub store_updatetime {
1443: my ($student_id,$updatetime,$fullupdatetime)=@_;
1444: my $values = '';
1445: if (defined($updatetime)) {
1446: $values = 'updatetime='.$updatetime.' ';
1447: }
1448: if (defined($fullupdatetime)) {
1449: if ($values ne '') {
1450: $values .= ',';
1451: }
1452: $values .= 'fullupdatetime='.$fullupdatetime.' ';
1453: }
1454: return if ($values eq '');
1455: my $dbh = &Apache::lonmysql::get_dbh();
1456: my $request = 'UPDATE '.$student_table.' SET '.$values.
1457: ' WHERE student_id='.$student_id.' LIMIT 1';
1458: $dbh->do($request);
1459: }
1460:
1461: sub store_student_data {
1462: my ($sname,$sdom,$courseid,$student_data) = @_;
1463: #
1464: my $student_id = &get_student_id($sname,$sdom);
1465: my $student = $sname.':'.$sdom;
1466: #
1467: my $returnstatus = 'okay';
1468: #
1469: # Remove all of the students data from the table
1470: my $dbh = &Apache::lonmysql::get_dbh();
1471: $dbh->do('DELETE FROM '.$performance_table.' WHERE student_id='.
1472: $student_id);
1473: $dbh->do('DELETE FROM '.$parameters_table.' WHERE student_id='.
1474: $student_id);
1475: #
1476: # Store away the data
1477: #
1478: my $starttime = Time::HiRes::time;
1479: my $elapsed = 0;
1480: my $rows_stored;
1481: my $store_parameters_command = 'INSERT IGNORE INTO '.$parameters_table.
1482: ' VALUES '."\n";
1483: my $num_parameters = 0;
1484: my $store_performance_command = 'INSERT IGNORE INTO '.$performance_table.
1485: ' VALUES '."\n";
1486: return ('error',undef) if (! defined($dbh));
1487: while (my ($current_symb,$param_hash) = each(%{$student_data})) {
1488: #
1489: # make sure the symb is set up properly
1490: my $symb_id = &get_symb_id($current_symb);
1491: #
1492: # Load data into the tables
1493: while (my ($parameter,$value) = each(%$param_hash)) {
1494: my $newstring;
1495: if ($parameter !~ /(timestamp|resource\.(.*)\.(solved|tries|awarded|award|awarddetail|previous))/) {
1496: $newstring = "('".join("','",
1497: $symb_id,$student_id,
1498: $parameter)."',".
1499: $dbh->quote($value)."),\n";
1500: $num_parameters ++;
1501: if ($newstring !~ /''/) {
1502: $store_parameters_command .= $newstring;
1503: $rows_stored++;
1504: }
1505: }
1506: next if ($parameter !~ /^resource\.(.*)\.solved$/);
1507: #
1508: my $part = $1;
1509: my $part_id = &get_part_id($part);
1510: next if (!defined($part_id));
1511: my $solved = $value;
1512: my $tries = $param_hash->{'resource.'.$part.'.tries'};
1513: my $awarded = $param_hash->{'resource.'.$part.'.awarded'};
1514: my $award = $param_hash->{'resource.'.$part.'.award'};
1515: my $awarddetail = $param_hash->{'resource.'.$part.'.awarddetail'};
1516: my $timestamp = $param_hash->{'timestamp'};
1517: #
1518: $solved = '' if (! defined($solved));
1519: $tries = '' if (! defined($tries));
1520: $awarded = '' if (! defined($awarded));
1521: $award = '' if (! defined($award));
1522: $awarddetail = '' if (! defined($awarddetail));
1523: $newstring = "('".join("','",$symb_id,$student_id,$part_id,$part,
1524: $solved,$tries,$awarded,$award,
1525: $awarddetail,$timestamp)."'),\n";
1526: $store_performance_command .= $newstring;
1527: $rows_stored++;
1528: }
1529: }
1530: chop $store_parameters_command;
1531: chop $store_parameters_command;
1532: chop $store_performance_command;
1533: chop $store_performance_command;
1534: my $start = Time::HiRes::time;
1535: $dbh->do($store_performance_command);
1536: if ($dbh->err()) {
1537: &Apache::lonnet::logthis(' bigass insert error:'.$dbh->errstr());
1538: &Apache::lonnet::logthis('command = '.$store_performance_command);
1539: $returnstatus = 'error: unable to insert performance into database';
1540: return ($returnstatus,$student_data);
1541: }
1542: $dbh->do($store_parameters_command) if ($num_parameters>0);
1543: if ($dbh->err()) {
1544: &Apache::lonnet::logthis(' bigass insert error:'.$dbh->errstr());
1545: &Apache::lonnet::logthis('command = '.$store_parameters_command);
1546: &Apache::lonnet::logthis('rows_stored = '.$rows_stored);
1547: &Apache::lonnet::logthis('student_id = '.$student_id);
1548: $returnstatus = 'error: unable to insert parameters into database';
1549: return ($returnstatus,$student_data);
1550: }
1551: $elapsed += Time::HiRes::time - $start;
1552: return ($returnstatus,$student_data);
1553: }
1554:
1555: ######################################
1556: ######################################
1557:
1558: =pod
1559:
1560: =item &ensure_tables_are_set_up($courseid)
1561:
1562: Checks to be sure the MySQL tables for the given class are set up.
1563: If $courseid is omitted it will be obtained from the environment.
1564:
1565: Returns nothing on success and 'error' on failure
1566:
1567: =cut
1568:
1569: ######################################
1570: ######################################
1571: sub ensure_tables_are_set_up {
1572: my ($courseid) = @_;
1573: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1574: #
1575: # Clean out package variables
1576: &setup_table_names($courseid);
1577: #
1578: # if the tables do not exist, make them
1579: my @CurrentTable = &Apache::lonmysql::tables_in_db();
1580: my ($found_symb,$found_student,$found_part,
1581: $found_performance,$found_parameters,$found_fulldump_part,
1582: $found_fulldump_response,$found_fulldump_timestamp,
1583: $found_weight);
1584: foreach (@CurrentTable) {
1585: $found_symb = 1 if ($_ eq $symb_table);
1586: $found_student = 1 if ($_ eq $student_table);
1587: $found_part = 1 if ($_ eq $part_table);
1588: $found_performance = 1 if ($_ eq $performance_table);
1589: $found_parameters = 1 if ($_ eq $parameters_table);
1590: $found_fulldump_part = 1 if ($_ eq $fulldump_part_table);
1591: $found_fulldump_response = 1 if ($_ eq $fulldump_response_table);
1592: $found_fulldump_timestamp = 1 if ($_ eq $fulldump_timestamp_table);
1593: $found_weight = 1 if ($_ eq $weight_table);
1594: }
1595: if (!$found_symb ||
1596: !$found_student || !$found_part ||
1597: !$found_performance || !$found_parameters ||
1598: !$found_fulldump_part || !$found_fulldump_response ||
1599: !$found_fulldump_timestamp || !$found_weight ) {
1600: if (&init_dbs($courseid,1)) {
1601: return 'error';
1602: }
1603: }
1604: }
1605:
1606: ################################################
1607: ################################################
1608:
1609: =pod
1610:
1611: =item &ensure_current_data()
1612:
1613: Input: $sname, $sdom, $courseid
1614:
1615: Output: $status, $data
1616:
1617: This routine ensures the data for a given student is up to date.
1618: The $student_table is queried to determine the time of the last update.
1619: If the students data is out of date, &update_student_data() is called.
1620: The return values from the call to &update_student_data() are returned.
1621:
1622: =cut
1623:
1624: ################################################
1625: ################################################
1626: sub ensure_current_data {
1627: my ($sname,$sdom,$courseid) = @_;
1628: my $status = 'okay'; # return value
1629: #
1630: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1631: &ensure_tables_are_set_up($courseid);
1632: #
1633: # Get the update time for the user
1634: my $updatetime = 0;
1635: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1636: ($sdom,$sname,$courseid.'.db',
1637: $Apache::lonnet::perlvar{'lonUsersDir'});
1638: #
1639: my $student_id = &get_student_id($sname,$sdom);
1640: my @Result = &Apache::lonmysql::get_rows($student_table,
1641: "student_id ='$student_id'");
1642: my $data = undef;
1643: if (@Result) {
1644: $updatetime = $Result[0]->[5]; # Ack! This is dumb!
1645: }
1646: if ($modifiedtime > $updatetime) {
1647: ($status,$data) = &update_student_data($sname,$sdom,$courseid);
1648: }
1649: return ($status,$data);
1650: }
1651:
1652: ################################################
1653: ################################################
1654:
1655: =pod
1656:
1657: =item &ensure_current_full_data($sname,$sdom,$courseid)
1658:
1659: Input: $sname, $sdom, $courseid
1660:
1661: Output: $status
1662:
1663: This routine ensures the fulldata (the data from a lonnet::dump, not a
1664: lonnet::currentdump) for a given student is up to date.
1665: The $student_table is queried to determine the time of the last update.
1666: If the students fulldata is out of date, &update_full_student_data() is
1667: called.
1668:
1669: The return value from the call to &update_full_student_data() is returned.
1670:
1671: =cut
1672:
1673: ################################################
1674: ################################################
1675: sub ensure_current_full_data {
1676: my ($sname,$sdom,$courseid) = @_;
1677: my $status = 'okay'; # return value
1678: #
1679: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1680: &ensure_tables_are_set_up($courseid);
1681: #
1682: # Get the update time for the user
1683: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1684: ($sdom,$sname,$courseid.'.db',
1685: $Apache::lonnet::perlvar{'lonUsersDir'});
1686: #
1687: my $student_id = &get_student_id($sname,$sdom);
1688: my @Result = &Apache::lonmysql::get_rows($student_table,
1689: "student_id ='$student_id'");
1690: my $updatetime;
1691: if (@Result && ref($Result[0]) eq 'ARRAY') {
1692: $updatetime = $Result[0]->[6];
1693: }
1694: if (! defined($updatetime) || $modifiedtime > $updatetime) {
1695: $status = &update_full_student_data($sname,$sdom,$courseid);
1696: }
1697: return $status;
1698: }
1699:
1700: ################################################
1701: ################################################
1702:
1703: =pod
1704:
1705: =item &get_student_data_from_performance_cache()
1706:
1707: Input: $sname, $sdom, $symb, $courseid
1708:
1709: Output: hash reference containing the data for the given student.
1710: If $symb is undef, all the students data is returned.
1711:
1712: This routine is the heart of the local caching system. See the description
1713: of $performance_table, $symb_table, $student_table, and $part_table. The
1714: main task is building the MySQL request. The tables appear in the request
1715: in the order in which they should be parsed by MySQL. When searching
1716: on a student the $student_table is used to locate the 'student_id'. All
1717: rows in $performance_table which have a matching 'student_id' are returned,
1718: with data from $part_table and $symb_table which match the entries in
1719: $performance_table, 'part_id' and 'symb_id'. When searching on a symb,
1720: the $symb_table is processed first, with matching rows grabbed from
1721: $performance_table and filled in from $part_table and $student_table in
1722: that order.
1723:
1724: Running 'EXPLAIN ' on the 'SELECT' statements generated can be quite
1725: interesting, especially if you play with the order the tables are listed.
1726:
1727: =cut
1728:
1729: ################################################
1730: ################################################
1731: sub get_student_data_from_performance_cache {
1732: my ($sname,$sdom,$symb,$courseid)=@_;
1733: my $student = $sname.':'.$sdom if (defined($sname) && defined($sdom));
1734: &setup_table_names($courseid);
1735: #
1736: # Return hash
1737: my $studentdata;
1738: #
1739: my $dbh = &Apache::lonmysql::get_dbh();
1740: my $request = "SELECT ".
1741: "d.symb,a.part,a.solved,a.tries,a.awarded,a.award,a.awarddetail,".
1742: "a.timestamp ";
1743: if (defined($student)) {
1744: $request .= "FROM $student_table AS b ".
1745: "LEFT JOIN $performance_table AS a ON b.student_id=a.student_id ".
1746: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1747: "LEFT JOIN $symb_table AS d ON d.symb_id = a.symb_id ".
1748: "WHERE student='$student'";
1749: if (defined($symb) && $symb ne '') {
1750: $request .= " AND d.symb=".$dbh->quote($symb);
1751: }
1752: } elsif (defined($symb) && $symb ne '') {
1753: $request .= "FROM $symb_table as d ".
1754: "LEFT JOIN $performance_table AS a ON d.symb_id=a.symb_id ".
1755: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1756: "LEFT JOIN $student_table AS b ON b.student_id = a.student_id ".
1757: "WHERE symb='".$dbh->quote($symb)."'";
1758: }
1759: my $starttime = Time::HiRes::time;
1760: my $rows_retrieved = 0;
1761: my $sth = $dbh->prepare($request);
1762: $sth->execute();
1763: if ($sth->err()) {
1764: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1765: &Apache::lonnet::logthis("\n".$request."\n");
1766: &Apache::lonnet::logthis("error is:".$sth->errstr());
1767: return undef;
1768: }
1769: foreach my $row (@{$sth->fetchall_arrayref}) {
1770: $rows_retrieved++;
1771: my ($symb,$part,$solved,$tries,$awarded,$award,$awarddetail,$time) =
1772: (@$row);
1773: my $base = 'resource.'.$part;
1774: $studentdata->{$symb}->{$base.'.solved'} = $solved;
1775: $studentdata->{$symb}->{$base.'.tries'} = $tries;
1776: $studentdata->{$symb}->{$base.'.awarded'} = $awarded;
1777: $studentdata->{$symb}->{$base.'.award'} = $award;
1778: $studentdata->{$symb}->{$base.'.awarddetail'} = $awarddetail;
1779: $studentdata->{$symb}->{'timestamp'} = $time if (defined($time) && $time ne '');
1780: }
1781: ## Get misc parameters
1782: $request = 'SELECT c.symb,a.parameter,a.value '.
1783: "FROM $student_table AS b ".
1784: "LEFT JOIN $parameters_table AS a ON b.student_id=a.student_id ".
1785: "LEFT JOIN $symb_table AS c ON c.symb_id = a.symb_id ".
1786: "WHERE student='$student'";
1787: if (defined($symb) && $symb ne '') {
1788: $request .= " AND c.symb=".$dbh->quote($symb);
1789: }
1790: $sth = $dbh->prepare($request);
1791: $sth->execute();
1792: if ($sth->err()) {
1793: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1794: &Apache::lonnet::logthis("\n".$request."\n");
1795: &Apache::lonnet::logthis("error is:".$sth->errstr());
1796: if (defined($symb) && $symb ne '') {
1797: $studentdata = $studentdata->{$symb};
1798: }
1799: return $studentdata;
1800: }
1801: #
1802: foreach my $row (@{$sth->fetchall_arrayref}) {
1803: $rows_retrieved++;
1804: my ($symb,$parameter,$value) = (@$row);
1805: $studentdata->{$symb}->{$parameter} = $value;
1806: }
1807: #
1808: if (defined($symb) && $symb ne '') {
1809: $studentdata = $studentdata->{$symb};
1810: }
1811: return $studentdata;
1812: }
1813:
1814: ################################################
1815: ################################################
1816:
1817: =pod
1818:
1819: =item &get_current_state()
1820:
1821: Input: $sname,$sdom,$symb,$courseid
1822:
1823: Output: Described below
1824:
1825: Retrieve the current status of a students performance. $sname and
1826: $sdom are the only required parameters. If $symb is undef the results
1827: of an &Apache::lonnet::currentdump() will be returned.
1828: If $courseid is undef it will be retrieved from the environment.
1829:
1830: The return structure is based on &Apache::lonnet::currentdump. If
1831: $symb is unspecified, all the students data is returned in a hash of
1832: the form:
1833: (
1834: symb1 => { param1 => value1, param2 => value2 ... },
1835: symb2 => { param1 => value1, param2 => value2 ... },
1836: )
1837:
1838: If $symb is specified, a hash of
1839: (
1840: param1 => value1,
1841: param2 => value2,
1842: )
1843: is returned.
1844:
1845: If no data is found for $symb, or if the student has no performance data,
1846: an empty list is returned.
1847:
1848: =cut
1849:
1850: ################################################
1851: ################################################
1852: sub get_current_state {
1853: my ($sname,$sdom,$symb,$courseid,$forcedownload)=@_;
1854: #
1855: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1856: #
1857: return () if (! defined($sname) || ! defined($sdom));
1858: #
1859: my ($status,$data) = &ensure_current_data($sname,$sdom,$courseid);
1860: # &Apache::lonnet::logthis
1861: # ('sname = '.$sname.
1862: # ' domain = '.$sdom.
1863: # ' status = '.$status.
1864: # ' data is '.(defined($data)?'defined':'undefined'));
1865: # while (my ($symb,$hash) = each(%$data)) {
1866: # &Apache::lonnet::logthis($symb."\n----------------------------------");
1867: # while (my ($key,$value) = each (%$hash)) {
1868: # &Apache::lonnet::logthis(" ".$key." = ".$value);
1869: # }
1870: # }
1871: #
1872: if (defined($data) && defined($symb) && ref($data->{$symb})) {
1873: return %{$data->{$symb}};
1874: } elsif (defined($data) && ! defined($symb) && ref($data)) {
1875: return %$data;
1876: }
1877: if ($status eq 'no data') {
1878: return ();
1879: } else {
1880: if ($status ne 'okay' && $status ne '') {
1881: &Apache::lonnet::logthis('status = '.$status);
1882: return ();
1883: }
1884: my $returnhash = &get_student_data_from_performance_cache($sname,$sdom,
1885: $symb,$courseid);
1886: return %$returnhash if (defined($returnhash));
1887: }
1888: return ();
1889: }
1890:
1891: ################################################
1892: ################################################
1893:
1894: =pod
1895:
1896: =item &get_problem_statistics()
1897:
1898: Gather data on a given problem. The database is assumed to be
1899: populated and all local caching variables are assumed to be set
1900: properly. This means you need to call &ensure_current_data for
1901: the students you are concerned with prior to calling this routine.
1902:
1903: Inputs: $Sections, $status, $symb, $part, $courseid, $starttime, $endtime
1904:
1905: =over 4
1906:
1907: =item $Sections Array ref containing section names for students.
1908: 'all' is allowed to be the first (and only) item in the array.
1909:
1910: =item $status String describing the status of students
1911:
1912: =item $symb is the symb for the problem.
1913:
1914: =item $part is the part id you need statistics for
1915:
1916: =item $courseid is the course id, of course!
1917:
1918: =item $starttime and $endtime are unix times which to use to limit
1919: the statistical data.
1920:
1921: =back
1922:
1923: Outputs: See the code for up to date information. A hash reference is
1924: returned. The hash has the following keys defined:
1925:
1926: =over 4
1927:
1928: =item num_students The number of students attempting the problem
1929:
1930: =item tries The total number of tries for the students
1931:
1932: =item max_tries The maximum number of tries taken
1933:
1934: =item mean_tries The average number of tries
1935:
1936: =item num_solved The number of students able to solve the problem
1937:
1938: =item num_override The number of students whose answer is 'correct_by_override'
1939:
1940: =item deg_of_diff The degree of difficulty of the problem
1941:
1942: =item std_tries The standard deviation of the number of tries
1943:
1944: =item skew_tries The skew of the number of tries
1945:
1946: =item per_wrong The number of students attempting the problem who were not
1947: able to answer it correctly.
1948:
1949: =back
1950:
1951: =cut
1952:
1953: ################################################
1954: ################################################
1955: sub get_problem_statistics {
1956: my ($Sections,$status,$symb,$part,$courseid,$starttime,$endtime) = @_;
1957: return if (! defined($symb) || ! defined($part));
1958: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1959: #
1960: &setup_table_names($courseid);
1961: my $symb_id = &get_symb_id($symb);
1962: my $part_id = &get_part_id($part);
1963: my $stats_table = $courseid.'_problem_stats';
1964: #
1965: my $dbh = &Apache::lonmysql::get_dbh();
1966: return undef if (! defined($dbh));
1967: #
1968: # Clean out the table
1969: $dbh->do('DROP TABLE '.$stats_table); # May return an error
1970: my $request =
1971: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
1972: 'SELECT a.student_id,a.solved,a.award,a.awarded,a.tries '.
1973: 'FROM '.$performance_table.' AS a ';
1974: #
1975: # See if we need to include some requirements on the students
1976: if ((defined($Sections) && lc($Sections->[0]) ne 'all') ||
1977: (defined($status) && lc($status) ne 'any')) {
1978: $request .= 'NATURAL LEFT JOIN '.$student_table.' AS b ';
1979: }
1980: $request .= ' WHERE a.symb_id='.$symb_id.' AND a.part_id='.$part_id;
1981: #
1982: # Limit the students included to those specified
1983: if (defined($Sections) && lc($Sections->[0]) ne 'all') {
1984: $request .= ' AND ('.
1985: join(' OR ', map { "b.section='".$_."'" } @$Sections
1986: ).')';
1987: }
1988: if (defined($status) && lc($status) ne 'any') {
1989: $request .= " AND b.status='".$status."'";
1990: }
1991: #
1992: # Limit by starttime and endtime
1993: my $time_requirements = undef;
1994: if (defined($starttime)) {
1995: $time_requirements .= 'a.timestamp>='.$starttime;
1996: if (defined($endtime)) {
1997: $time_requirements .= ' AND a.timestamp<='.$endtime;
1998: }
1999: } elsif (defined($endtime)) {
2000: $time_requirements .= 'a.timestamp<='.$endtime;
2001: }
2002: if (defined($time_requirements)) {
2003: $request .= ' AND '.$time_requirements;
2004: }
2005: #
2006: # Finally, execute the request to create the temporary table
2007: $dbh->do($request);
2008: #
2009: # Collect the first suite of statistics
2010: $request = 'SELECT COUNT(*),SUM(tries),'.
2011: 'AVG(tries),STD(tries) '.
2012: 'FROM '.$stats_table;
2013: my ($num,$tries,$mean,$STD) = &execute_SQL_request
2014: ($dbh,$request);
2015: #
2016: $request = 'SELECT MAX(tries),MIN(tries) FROM '.$stats_table.
2017: ' WHERE awarded>0';
2018: if (defined($time_requirements)) {
2019: $request .= ' AND '.$time_requirements;
2020: }
2021: my ($max,$min) = &execute_SQL_request($dbh,$request);
2022: #
2023: $request = 'SELECT SUM(awarded) FROM '.$stats_table;
2024: if (defined($time_requirements)) {
2025: $request .= ' AND '.$time_requirements;
2026: }
2027: my ($Solved) = &execute_SQL_request($dbh,$request);
2028: #
2029: $request = 'SELECT SUM(awarded) FROM '.$stats_table.
2030: " WHERE solved='correct_by_override'";
2031: if (defined($time_requirements)) {
2032: $request .= ' AND '.$time_requirements;
2033: }
2034: my ($solved) = &execute_SQL_request($dbh,$request);
2035: #
2036: $Solved -= $solved;
2037: #
2038: $num = 0 if (! defined($num));
2039: $tries = 0 if (! defined($tries));
2040: $max = 0 if (! defined($max));
2041: $min = 0 if (! defined($min));
2042: $STD = 0 if (! defined($STD));
2043: $Solved = 0 if (! defined($Solved) || $Solved < 0);
2044: $solved = 0 if (! defined($solved));
2045: #
2046: # Compute the more complicated statistics
2047: my $DegOfDiff = 'nan';
2048: $DegOfDiff = 1-($Solved)/$tries if ($tries>0);
2049: #
2050: my $SKEW = 'nan';
2051: my $wrongpercent = 0;
2052: my $numwrong = 'nan';
2053: if ($num > 0) {
2054: ($SKEW) = &execute_SQL_request($dbh,'SELECT SQRT(SUM('.
2055: 'POWER(tries - '.$STD.',3)'.
2056: '))/'.$num.' FROM '.$stats_table);
2057: $numwrong = $num-$Solved;
2058: $wrongpercent=int(10*100*$numwrong/$num)/10;
2059: }
2060: #
2061: # Drop the temporary table
2062: $dbh->do('DROP TABLE '.$stats_table); # May return an error
2063: #
2064: # Return result
2065: return { num_students => $num,
2066: tries => $tries,
2067: max_tries => $max,
2068: min_tries => $min,
2069: mean_tries => $mean,
2070: std_tries => $STD,
2071: skew_tries => $SKEW,
2072: num_solved => $Solved,
2073: num_override => $solved,
2074: num_wrong => $numwrong,
2075: per_wrong => $wrongpercent,
2076: deg_of_diff => $DegOfDiff };
2077: }
2078:
2079: ##
2080: ## This is a helper for get_statistics
2081: sub execute_SQL_request {
2082: my ($dbh,$request)=@_;
2083: # &Apache::lonnet::logthis($request);
2084: my $sth = $dbh->prepare($request);
2085: $sth->execute();
2086: my $row = $sth->fetchrow_arrayref();
2087: if (ref($row) eq 'ARRAY' && scalar(@$row)>0) {
2088: return @$row;
2089: }
2090: return ();
2091: }
2092:
2093: ######################################################
2094: ######################################################
2095:
2096: =pod
2097:
2098: =item &populate_weight_table
2099:
2100: =cut
2101:
2102: ######################################################
2103: ######################################################
2104: sub populate_weight_table {
2105: my ($courseid) = @_;
2106: if (! defined($courseid)) {
2107: $courseid = $ENV{'request.course.id'};
2108: }
2109: #
2110: &setup_table_names($courseid);
2111: my ($top,$sequences,$assessments) = get_sequence_assessment_data();
2112: if (! defined($top) || ! ref($top)) {
2113: # There has been an error, better report it
2114: &Apache::lonnet::logthis('top is undefined');
2115: return;
2116: }
2117: # Since we use lonnet::EXT to retrieve problem weights,
2118: # to ensure current data we must clear the caches out.
2119: &Apache::lonnet::clear_EXT_cache_status();
2120: my $dbh = &Apache::lonmysql::get_dbh();
2121: my $request = 'INSERT IGNORE INTO '.$weight_table.
2122: "(symb_id,part_id,weight) VALUES ";
2123: my $weight;
2124: foreach my $res (@$assessments) {
2125: my $symb_id = &get_symb_id($res->{'symb'});
2126: foreach my $part (@{$res->{'parts'}}) {
2127: my $part_id = &get_part_id($part);
2128: $weight = &Apache::lonnet::EXT('resource.'.$part.'.weight',
2129: $res->{'symb'},
2130: undef,undef,undef);
2131: if (!defined($weight) || ($weight eq '')) {
2132: $weight=1;
2133: }
2134: $request .= "('".$symb_id."','".$part_id."','".$weight."'),";
2135: }
2136: }
2137: $request =~ s/(,)$//;
2138: # &Apache::lonnet::logthis('request = '.$/.$request);
2139: $dbh->do($request);
2140: if ($dbh->err()) {
2141: &Apache::lonnet::logthis("error ".$dbh->errstr().
2142: " occured executing \n".
2143: $request);
2144: }
2145: return;
2146: }
2147:
2148: ##########################################################
2149: ##########################################################
2150:
2151: =pod
2152:
2153: =item &limit_by_start_end_times
2154:
2155: Build SQL WHERE condition which limits the data collected by the start
2156: and end times provided
2157:
2158: Inputs: $starttime, $endtime, $table
2159:
2160: Returns: $time_limits
2161:
2162: =cut
2163:
2164: ##########################################################
2165: ##########################################################
2166: sub limit_by_start_end_time {
2167: my ($starttime,$endtime,$table) = @_;
2168: my $time_requirements = undef;
2169: if (defined($starttime)) {
2170: $time_requirements .= $table.".timestamp>='".$starttime."'";
2171: if (defined($endtime)) {
2172: $time_requirements .= " AND ".$table.".timestamp<='".$endtime."'";
2173: }
2174: } elsif (defined($endtime)) {
2175: $time_requirements .= $table.".timestamp<='".$endtime."'";
2176: }
2177: return $time_requirements;
2178: }
2179:
2180: ##########################################################
2181: ##########################################################
2182:
2183: =pod
2184:
2185: =item &limit_by_section_and_status
2186:
2187: Build SQL WHERE condition which limits the data collected by section and
2188: student status.
2189:
2190: Inputs: $Sections (array ref)
2191: $enrollment (string: 'any', 'expired', 'active')
2192: $tablename The name of the table that holds the student data
2193:
2194: Returns: $student_requirements,$enrollment_requirements
2195:
2196: =cut
2197:
2198: ##########################################################
2199: ##########################################################
2200: sub limit_by_section_and_status {
2201: my ($Sections,$enrollment,$tablename) = @_;
2202: my $student_requirements = undef;
2203: if ( (defined($Sections) && $Sections->[0] ne 'all')) {
2204: $student_requirements = '('.
2205: join(' OR ', map { $tablename.".section='".$_."'" } @$Sections
2206: ).')';
2207: }
2208: #
2209: my $enrollment_requirements=undef;
2210: if (defined($enrollment) && $enrollment ne 'Any') {
2211: $enrollment_requirements = $tablename.".status='".$enrollment."'";
2212: }
2213: return ($student_requirements,$enrollment_requirements);
2214: }
2215:
2216: ######################################################
2217: ######################################################
2218:
2219: =pod
2220:
2221: =item rank_students_by_scores_on_resources
2222:
2223: Inputs:
2224: $resources: array ref of hash ref. Each hash ref needs key 'symb'.
2225: $Sections: array ref of sections to include,
2226: $enrollment: string,
2227: $courseid (may be omitted)
2228:
2229: Returns; An array of arrays. The sub arrays contain a student name and
2230: their score on the resources.
2231:
2232: =cut
2233:
2234: ######################################################
2235: ######################################################
2236: sub RNK_student { return 0; };
2237: sub RNK_score { return 1; };
2238:
2239: sub rank_students_by_scores_on_resources {
2240: my ($resources,$Sections,$enrollment,$courseid,$starttime,$endtime) = @_;
2241: return if (! defined($resources) || ! ref($resources) eq 'ARRAY');
2242: if (! defined($courseid)) {
2243: $courseid = $ENV{'request.course.id'};
2244: }
2245: #
2246: &setup_table_names($courseid);
2247: my $dbh = &Apache::lonmysql::get_dbh();
2248: my ($section_limits,$enrollment_limits)=
2249: &limit_by_section_and_status($Sections,$enrollment,'b');
2250: my $symb_limits = '('.join(' OR ',map {'a.symb_id='.&get_symb_id($_);
2251: } @$resources
2252: ).')';
2253: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
2254: my $request = 'SELECT b.student,SUM(a.awarded*w.weight) AS score FROM '.
2255: $performance_table.' AS a '.
2256: 'NATURAL LEFT JOIN '.$weight_table.' AS w '.
2257: 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.
2258: 'WHERE ';
2259: if (defined($section_limits)) {
2260: $request .= $section_limits.' AND ';
2261: }
2262: if (defined($enrollment_limits)) {
2263: $request .= $enrollment_limits.' AND ';
2264: }
2265: if (defined($time_limits)) {
2266: $request .= $time_limits.' AND ';
2267: }
2268: if ($symb_limits ne '()') {
2269: $request .= $symb_limits.' AND ';
2270: }
2271: $request =~ s/( AND )$//; # Remove extra conjunction
2272: $request =~ s/( WHERE )$//; # In case there were no limits placed on it
2273: $request .= ' GROUP BY a.student_id ORDER BY score';
2274: #&Apache::lonnet::logthis('request = '.$/.$request);
2275: my $sth = $dbh->prepare($request);
2276: $sth->execute();
2277: my $rows = $sth->fetchall_arrayref();
2278: return ($rows);
2279: }
2280:
2281: ########################################################
2282: ########################################################
2283:
2284: =pod
2285:
2286: =item &get_sum_of_scores
2287:
2288: Inputs: $resource (hash ref, needs {'symb'} key),
2289: $part, (the part id),
2290: $students (array ref, contents of array are scalars holding 'sname:sdom'),
2291: $courseid
2292:
2293: Returns: the sum of the score on the problem part over the students and the
2294: maximum possible value for the sum (taken from the weight table).
2295:
2296: =cut
2297:
2298: ########################################################
2299: ########################################################
2300: sub get_sum_of_scores {
2301: my ($resource,$part,$students,$courseid,$starttime,$endtime) = @_;
2302: if (! defined($courseid)) {
2303: $courseid = $ENV{'request.course.id'};
2304: }
2305: #
2306: &setup_table_names($courseid);
2307: my $dbh = &Apache::lonmysql::get_dbh();
2308: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
2309: my $request = 'SELECT SUM(a.awarded*w.weight),SUM(w.weight) FROM '.
2310: $performance_table.' AS a '.
2311: 'NATURAL LEFT JOIN '.$weight_table.' AS w ';
2312: $request .= 'WHERE a.symb_id='.&get_symb_id($resource->{'symb'}).
2313: ' AND a.part_id='.&get_part_id($part);
2314: if (defined($time_limits)) {
2315: $request .= ' AND '.$time_limits;
2316: }
2317: if (defined($students)) {
2318: $request .= ' AND ('.
2319: join(' OR ',map {'a.student_id='.&get_student_id(split(':',$_));
2320: } @$students).
2321: ')';
2322: }
2323: my $sth = $dbh->prepare($request);
2324: $sth->execute();
2325: my $rows = $sth->fetchrow_arrayref();
2326: if ($dbh->err) {
2327: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2328: return (undef,undef);
2329: }
2330: return ($rows->[0],$rows->[1]);
2331: }
2332:
2333: ########################################################
2334: ########################################################
2335:
2336: =pod
2337:
2338: =item &score_stats
2339:
2340: Inputs: $Sections, $enrollment, $symbs, $starttime,
2341: $endtime, $courseid
2342:
2343: $Sections, $enrollment, $starttime, $endtime, and $courseid are the same as
2344: elsewhere in this module.
2345: $symbs is an array ref of symbs
2346:
2347: Returns: minimum, maximum, mean, s.d., number of students, and maximum
2348: possible of student scores on the given resources
2349:
2350: =cut
2351:
2352: ########################################################
2353: ########################################################
2354: sub score_stats {
2355: my ($Sections,$enrollment,$symbs,$starttime,$endtime,$courseid)=@_;
2356: if (! defined($courseid)) {
2357: $courseid = $ENV{'request.course.id'};
2358: }
2359: #
2360: &setup_table_names($courseid);
2361: my $dbh = &Apache::lonmysql::get_dbh();
2362: #
2363: my ($section_limits,$enrollment_limits)=
2364: &limit_by_section_and_status($Sections,$enrollment,'b');
2365: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
2366: my @Symbids = map { &get_symb_id($_); } @{$symbs};
2367: #
2368: my $stats_table = $courseid.'_problem_stats';
2369: my $symb_restriction = join(' OR ',map {'a.symb_id='.$_;} @Symbids);
2370: my $request = 'DROP TABLE '.$stats_table;
2371: $dbh->do($request);
2372: $request =
2373: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
2374: 'SELECT a.student_id,'.
2375: 'SUM(a.awarded*w.weight) AS score FROM '.
2376: $performance_table.' AS a '.
2377: 'NATURAL LEFT JOIN '.$weight_table.' AS w '.
2378: 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.
2379: 'WHERE ('.$symb_restriction.')';
2380: if ($time_limits) {
2381: $request .= ' AND '.$time_limits;
2382: }
2383: if ($section_limits) {
2384: $request .= ' AND '.$section_limits;
2385: }
2386: if ($enrollment_limits) {
2387: $request .= ' AND '.$enrollment_limits;
2388: }
2389: $request .= ' GROUP BY a.student_id';
2390: # &Apache::lonnet::logthis('request = '.$/.$request);
2391: my $sth = $dbh->prepare($request);
2392: $sth->execute();
2393: $request =
2394: 'SELECT AVG(score),STD(score),MAX(score),MIN(score),COUNT(score) '.
2395: 'FROM '.$stats_table;
2396: my ($ave,$std,$max,$min,$count) = &execute_SQL_request($dbh,$request);
2397: # &Apache::lonnet::logthis('request = '.$/.$request);
2398:
2399: $request = 'SELECT SUM(weight) FROM '.$weight_table.
2400: ' WHERE ('.$symb_restriction.')';
2401: my ($max_possible) = &execute_SQL_request($dbh,$request);
2402: # &Apache::lonnet::logthis('request = '.$/.$request);
2403: return($min,$max,$ave,$std,$count,$max_possible);
2404: }
2405:
2406:
2407: ########################################################
2408: ########################################################
2409:
2410: =pod
2411:
2412: =item &count_stats
2413:
2414: Inputs: $Sections, $enrollment, $symbs, $starttime,
2415: $endtime, $courseid
2416:
2417: $Sections, $enrollment, $starttime, $endtime, and $courseid are the same as
2418: elsewhere in this module.
2419: $symbs is an array ref of symbs
2420:
2421: Returns: minimum, maximum, mean, s.d., and number of students
2422: of the number of items correct on the given resources
2423:
2424: =cut
2425:
2426: ########################################################
2427: ########################################################
2428: sub count_stats {
2429: my ($Sections,$enrollment,$symbs,$starttime,$endtime,$courseid)=@_;
2430: if (! defined($courseid)) {
2431: $courseid = $ENV{'request.course.id'};
2432: }
2433: #
2434: &setup_table_names($courseid);
2435: my $dbh = &Apache::lonmysql::get_dbh();
2436: #
2437: my ($section_limits,$enrollment_limits)=
2438: &limit_by_section_and_status($Sections,$enrollment,'b');
2439: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
2440: my @Symbids = map { &get_symb_id($_); } @{$symbs};
2441: #
2442: my $stats_table = $courseid.'_problem_stats';
2443: my $symb_restriction = join(' OR ',map {'a.symb_id='.$_;} @Symbids);
2444: my $request = 'DROP TABLE '.$stats_table;
2445: $dbh->do($request);
2446: $request =
2447: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
2448: 'SELECT a.student_id,'.
2449: 'COUNT(a.award) AS count FROM '.
2450: $performance_table.' AS a '.
2451: 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.
2452: 'WHERE ('.$symb_restriction.')'.
2453: " AND a.award!='INCORRECT_ATTEMPTED'";
2454: if ($time_limits) {
2455: $request .= ' AND '.$time_limits;
2456: }
2457: if ($section_limits) {
2458: $request .= ' AND '.$section_limits;
2459: }
2460: if ($enrollment_limits) {
2461: $request .= ' AND '.$enrollment_limits;
2462: }
2463: $request .= ' GROUP BY a.student_id';
2464: # &Apache::lonnet::logthis('request = '.$/.$request);
2465: my $sth = $dbh->prepare($request);
2466: $sth->execute();
2467: $request =
2468: 'SELECT AVG(count),STD(count),MAX(count),MIN(count),COUNT(count) '.
2469: 'FROM '.$stats_table;
2470: my ($ave,$std,$max,$min,$count) = &execute_SQL_request($dbh,$request);
2471: # &Apache::lonnet::logthis('request = '.$/.$request);
2472: return($min,$max,$ave,$std,$count);
2473: }
2474:
2475: ######################################################
2476: ######################################################
2477:
2478: =pod
2479:
2480: =item get_student_data
2481:
2482: =cut
2483:
2484: ######################################################
2485: ######################################################
2486: sub get_student_data {
2487: my ($students,$courseid) = @_;
2488: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2489: &setup_table_names($courseid);
2490: my $dbh = &Apache::lonmysql::get_dbh();
2491: return undef if (! defined($dbh));
2492: my $request = 'SELECT '.
2493: 'student_id, student '.
2494: 'FROM '.$student_table;
2495: if (defined($students)) {
2496: $request .= ' WHERE ('.
2497: join(' OR ', map {'student_id='.
2498: &get_student_id($_->{'username'},
2499: $_->{'domain'})
2500: } @$students
2501: ).')';
2502: }
2503: $request.= ' ORDER BY student_id';
2504: my $sth = $dbh->prepare($request);
2505: $sth->execute();
2506: if ($dbh->err) {
2507: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2508: return undef;
2509: }
2510: my $dataset = $sth->fetchall_arrayref();
2511: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2512: return $dataset;
2513: }
2514: }
2515:
2516: sub RD_student_id { return 0; }
2517: sub RD_awarddetail { return 1; }
2518: sub RD_response_eval { return 2; }
2519: sub RD_submission { return 3; }
2520: sub RD_timestamp { return 4; }
2521: sub RD_tries { return 5; }
2522: sub RD_sname { return 6; }
2523:
2524: sub get_response_data {
2525: my ($Sections,$enrollment,$symb,$response,$courseid) = @_;
2526: return undef if (! defined($symb) ||
2527: ! defined($response));
2528: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2529: #
2530: &setup_table_names($courseid);
2531: my $symb_id = &get_symb_id($symb);
2532: my $response_id = &get_part_id($response);
2533: #
2534: my $dbh = &Apache::lonmysql::get_dbh();
2535: return undef if (! defined($dbh));
2536: #
2537: my ($student_requirements,$enrollment_requirements) =
2538: &limit_by_section_and_status($Sections,$enrollment,'d');
2539: my $request = 'SELECT '.
2540: 'a.student_id, a.awarddetail, a.response_specific_value, '.
2541: 'a.submission, b.timestamp, c.tries, d.student '.
2542: 'FROM '.$fulldump_response_table.' AS a '.
2543: 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2544: 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2545: 'a.transaction = b.transaction '.
2546: 'LEFT JOIN '.$fulldump_part_table.' AS c '.
2547: 'ON a.symb_id=c.symb_id AND a.student_id=c.student_id AND '.
2548: 'a.part_id=c.part_id AND a.transaction = c.transaction '.
2549: 'LEFT JOIN '.$student_table.' AS d '.
2550: 'ON a.student_id=d.student_id '.
2551: 'WHERE '.
2552: 'a.symb_id='.$symb_id.' AND a.response_id='.$response_id;
2553: if (defined($student_requirements) || defined($enrollment_requirements)) {
2554: $request .= ' AND ';
2555: if (defined($student_requirements)) {
2556: $request .= $student_requirements.' AND ';
2557: }
2558: if (defined($enrollment_requirements)) {
2559: $request .= $enrollment_requirements.' AND ';
2560: }
2561: $request =~ s/( AND )$//;
2562: }
2563: $request .= ' ORDER BY b.timestamp';
2564: # &Apache::lonnet::logthis("request =\n".$request);
2565: my $sth = $dbh->prepare($request);
2566: $sth->execute();
2567: if ($dbh->err) {
2568: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2569: return undef;
2570: }
2571: my $dataset = $sth->fetchall_arrayref();
2572: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2573: # Clear the \'s from around the submission
2574: for (my $i =0;$i<scalar(@$dataset);$i++) {
2575: $dataset->[$i]->[3] =~ s/(\'$|^\')//g;
2576: }
2577: return $dataset;
2578: }
2579: }
2580:
2581:
2582: sub RDs_awarddetail { return 3; }
2583: sub RDs_submission { return 2; }
2584: sub RDs_timestamp { return 1; }
2585: sub RDs_tries { return 0; }
2586: sub RDs_awarded { return 4; }
2587:
2588: sub get_response_data_by_student {
2589: my ($student,$symb,$response,$courseid) = @_;
2590: return undef if (! defined($symb) ||
2591: ! defined($response));
2592: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2593: #
2594: &setup_table_names($courseid);
2595: my $symb_id = &get_symb_id($symb);
2596: my $response_id = &get_part_id($response);
2597: #
2598: my $student_id = &get_student_id($student->{'username'},
2599: $student->{'domain'});
2600: #
2601: my $dbh = &Apache::lonmysql::get_dbh();
2602: return undef if (! defined($dbh));
2603: my $request = 'SELECT '.
2604: 'c.tries, b.timestamp, a.submission, a.awarddetail, e.awarded '.
2605: 'FROM '.$fulldump_response_table.' AS a '.
2606: 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2607: 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2608: 'a.transaction = b.transaction '.
2609: 'LEFT JOIN '.$fulldump_part_table.' AS c '.
2610: 'ON a.symb_id=c.symb_id AND a.student_id=c.student_id AND '.
2611: 'a.part_id=c.part_id AND a.transaction = c.transaction '.
2612: 'LEFT JOIN '.$student_table.' AS d '.
2613: 'ON a.student_id=d.student_id '.
2614: 'LEFT JOIN '.$performance_table.' AS e '.
2615: 'ON a.symb_id=e.symb_id AND a.part_id=e.part_id AND '.
2616: 'a.student_id=e.student_id AND c.tries=e.tries '.
2617: 'WHERE '.
2618: 'a.symb_id='.$symb_id.' AND a.response_id='.$response_id.
2619: ' AND a.student_id='.$student_id.' ORDER BY b.timestamp';
2620: # &Apache::lonnet::logthis("request =\n".$request);
2621: my $sth = $dbh->prepare($request);
2622: $sth->execute();
2623: if ($dbh->err) {
2624: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2625: return undef;
2626: }
2627: my $dataset = $sth->fetchall_arrayref();
2628: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2629: # Clear the \'s from around the submission
2630: for (my $i =0;$i<scalar(@$dataset);$i++) {
2631: $dataset->[$i]->[2] =~ s/(\'$|^\')//g;
2632: }
2633: return $dataset;
2634: }
2635: return undef; # error occurred
2636: }
2637:
2638: sub RT_student_id { return 0; }
2639: sub RT_awarded { return 1; }
2640: sub RT_tries { return 2; }
2641: sub RT_timestamp { return 3; }
2642:
2643: sub get_response_time_data {
2644: my ($students,$symb,$part,$courseid) = @_;
2645: return undef if (! defined($symb) ||
2646: ! defined($part));
2647: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2648: #
2649: &setup_table_names($courseid);
2650: my $symb_id = &get_symb_id($symb);
2651: my $part_id = &get_part_id($part);
2652: #
2653: my $dbh = &Apache::lonmysql::get_dbh();
2654: return undef if (! defined($dbh));
2655: my $request = 'SELECT '.
2656: 'a.student_id, a.awarded, a.tries, b.timestamp '.
2657: 'FROM '.$fulldump_part_table.' AS a '.
2658: 'NATURAL LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2659: # 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2660: # 'a.transaction = b.transaction '.
2661: 'WHERE '.
2662: 'a.symb_id='.$symb_id.' AND a.part_id='.$part_id;
2663: if (defined($students)) {
2664: $request .= ' AND ('.
2665: join(' OR ', map {'a.student_id='.
2666: &get_student_id($_->{'username'},
2667: $_->{'domain'})
2668: } @$students
2669: ).')';
2670: }
2671: $request .= ' ORDER BY b.timestamp';
2672: # &Apache::lonnet::logthis("request =\n".$request);
2673: my $sth = $dbh->prepare($request);
2674: $sth->execute();
2675: if ($dbh->err) {
2676: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2677: return undef;
2678: }
2679: my $dataset = $sth->fetchall_arrayref();
2680: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2681: return $dataset;
2682: }
2683:
2684: }
2685:
2686: ################################################
2687: ################################################
2688:
2689: =pod
2690:
2691: =item &get_student_scores($Sections,$Symbs,$enrollment,$courseid)
2692:
2693: =cut
2694:
2695: ################################################
2696: ################################################
2697: sub get_student_scores {
2698: my ($Sections,$Symbs,$enrollment,$courseid,$starttime,$endtime) = @_;
2699: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2700: &setup_table_names($courseid);
2701: my $dbh = &Apache::lonmysql::get_dbh();
2702: return (undef) if (! defined($dbh));
2703: my $tmptable = $courseid.'_temp_'.time;
2704: #
2705: my $symb_requirements;
2706: if (defined($Symbs) && @$Symbs) {
2707: $symb_requirements = '('.
2708: join(' OR ', map{ "(a.symb_id='".&get_symb_id($_->{'symb'}).
2709: "' AND a.part_id='".&get_part_id($_->{'part'}).
2710: "')"
2711: } @$Symbs).')';
2712: }
2713: #
2714: my $student_requirements;
2715: if ( (defined($Sections) && $Sections->[0] ne 'all')) {
2716: $student_requirements = '('.
2717: join(' OR ', map { "b.section='".$_."'" } @$Sections
2718: ).')';
2719: }
2720: #
2721: my $enrollment_requirements=undef;
2722: if (defined($enrollment) && $enrollment ne 'Any') {
2723: $enrollment_requirements = "b.status='".$enrollment."'";
2724: }
2725: #
2726: my $time_requirements = undef;
2727: if (defined($starttime)) {
2728: $time_requirements .= "a.timestamp>='".$starttime."'";
2729: if (defined($endtime)) {
2730: $time_requirements .= " AND a.timestamp<='".$endtime."'";
2731: }
2732: } elsif (defined($endtime)) {
2733: $time_requirements .= "a.timestamp<='".$endtime."'";
2734: }
2735: ##
2736: ##
2737: my $request = 'CREATE TEMPORARY TABLE IF NOT EXISTS '.$tmptable.
2738: ' SELECT a.student_id,SUM(a.awarded) AS score FROM '.
2739: $performance_table.' AS a ';
2740: if (defined($student_requirements) || defined($enrollment_requirements)) {
2741: $request .= ' NATURAL LEFT JOIN '.$student_table.' AS b ';
2742: }
2743: if (defined($symb_requirements) ||
2744: defined($student_requirements) ||
2745: defined($enrollment_requirements) ) {
2746: $request .= ' WHERE ';
2747: }
2748: if (defined($symb_requirements)) {
2749: $request .= $symb_requirements.' AND ';
2750: }
2751: if (defined($student_requirements)) {
2752: $request .= $student_requirements.' AND ';
2753: }
2754: if (defined($enrollment_requirements)) {
2755: $request .= $enrollment_requirements.' AND ';
2756: }
2757: if (defined($time_requirements)) {
2758: $request .= $time_requirements.' AND ';
2759: }
2760: $request =~ s/ AND $//; # Strip of the trailing ' AND '.
2761: $request .= ' GROUP BY a.student_id';
2762: # &Apache::lonnet::logthis("request = \n".$request);
2763: my $sth = $dbh->prepare($request);
2764: $sth->execute();
2765: if ($dbh->err) {
2766: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2767: return undef;
2768: }
2769: $request = 'SELECT score,COUNT(*) FROM '.$tmptable.' GROUP BY score';
2770: # &Apache::lonnet::logthis("request = \n".$request);
2771: $sth = $dbh->prepare($request);
2772: $sth->execute();
2773: if ($dbh->err) {
2774: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2775: return undef;
2776: }
2777: my $dataset = $sth->fetchall_arrayref();
2778: return $dataset;
2779: }
2780:
2781: ################################################
2782: ################################################
2783:
2784: =pod
2785:
2786: =item &setup_table_names()
2787:
2788: input: course id
2789:
2790: output: none
2791:
2792: Cleans up the package variables for local caching.
2793:
2794: =cut
2795:
2796: ################################################
2797: ################################################
2798: sub setup_table_names {
2799: my ($courseid) = @_;
2800: if (! defined($courseid)) {
2801: $courseid = $ENV{'request.course.id'};
2802: }
2803: #
2804: if (! defined($current_course) || $current_course ne $courseid) {
2805: # Clear out variables
2806: $have_read_part_table = 0;
2807: undef(%ids_by_part);
2808: undef(%parts_by_id);
2809: $have_read_symb_table = 0;
2810: undef(%ids_by_symb);
2811: undef(%symbs_by_id);
2812: $have_read_student_table = 0;
2813: undef(%ids_by_student);
2814: undef(%students_by_id);
2815: #
2816: $current_course = $courseid;
2817: }
2818: #
2819: # Set up database names
2820: my $base_id = $courseid;
2821: $symb_table = $base_id.'_'.'symb';
2822: $part_table = $base_id.'_'.'part';
2823: $student_table = $base_id.'_'.'student';
2824: $performance_table = $base_id.'_'.'performance';
2825: $parameters_table = $base_id.'_'.'parameters';
2826: $fulldump_part_table = $base_id.'_'.'partdata';
2827: $fulldump_response_table = $base_id.'_'.'responsedata';
2828: $fulldump_timestamp_table = $base_id.'_'.'timestampdata';
2829: $weight_table = $base_id.'_'.'weight';
2830: #
2831: @Tables = (
2832: $symb_table,
2833: $part_table,
2834: $student_table,
2835: $performance_table,
2836: $parameters_table,
2837: $fulldump_part_table,
2838: $fulldump_response_table,
2839: $fulldump_timestamp_table,
2840: $weight_table,
2841: );
2842: return;
2843: }
2844:
2845: ################################################
2846: ################################################
2847:
2848: =pod
2849:
2850: =back
2851:
2852: =item End of Local Data Caching Subroutines
2853:
2854: =cut
2855:
2856: ################################################
2857: ################################################
2858:
2859: } # End scope of table identifiers
2860:
2861: ################################################
2862: ################################################
2863:
2864: =pod
2865:
2866: =head3 Classlist Subroutines
2867:
2868: =item &get_classlist();
2869:
2870: Retrieve the classist of a given class or of the current class. Student
2871: information is returned from the classlist.db file and, if needed,
2872: from the students environment.
2873:
2874: Optional arguments are $cid, $cdom, and $cnum (course id, course domain,
2875: and course number, respectively). Any omitted arguments will be taken
2876: from the current environment ($ENV{'request.course.id'},
2877: $ENV{'course.'.$cid.'.domain'}, and $ENV{'course.'.$cid.'.num'}).
2878:
2879: Returns a reference to a hash which contains:
2880: keys '$sname:$sdom'
2881: values [$sdom,$sname,$end,$start,$id,$section,$fullname,$status,$type]
2882:
2883: The constant values CL_SDOM, CL_SNAME, CL_END, etc. can be used
2884: as indices into the returned list to future-proof clients against
2885: changes in the list order.
2886:
2887: =cut
2888:
2889: ################################################
2890: ################################################
2891:
2892: sub CL_SDOM { return 0; }
2893: sub CL_SNAME { return 1; }
2894: sub CL_END { return 2; }
2895: sub CL_START { return 3; }
2896: sub CL_ID { return 4; }
2897: sub CL_SECTION { return 5; }
2898: sub CL_FULLNAME { return 6; }
2899: sub CL_STATUS { return 7; }
2900: sub CL_TYPE { return 8; }
2901:
2902: sub get_classlist {
2903: my ($cid,$cdom,$cnum) = @_;
2904: $cid = $cid || $ENV{'request.course.id'};
2905: $cdom = $cdom || $ENV{'course.'.$cid.'.domain'};
2906: $cnum = $cnum || $ENV{'course.'.$cid.'.num'};
2907: my $now = time;
2908: #
2909: my %classlist=&Apache::lonnet::dump('classlist',$cdom,$cnum);
2910: while (my ($student,$info) = each(%classlist)) {
2911: if ($student =~ /^(con_lost|error|no_such_host)/i) {
2912: &Apache::lonnet::logthis('get_classlist error for '.$cid.':'.$student);
2913: return undef;
2914: }
2915: my ($sname,$sdom) = split(/:/,$student);
2916: my @Values = split(/:/,$info);
2917: my ($end,$start,$id,$section,$fullname,$type);
2918: if (@Values > 2) {
2919: ($end,$start,$id,$section,$fullname,$type) = @Values;
2920: } else { # We have to get the data ourselves
2921: ($end,$start) = @Values;
2922: $section = &Apache::lonnet::getsection($sdom,$sname,$cid);
2923: my %info=&Apache::lonnet::get('environment',
2924: ['firstname','middlename',
2925: 'lastname','generation','id'],
2926: $sdom, $sname);
2927: my ($tmp) = keys(%info);
2928: if ($tmp =~/^(con_lost|error|no_such_host)/i) {
2929: $fullname = 'not available';
2930: $id = 'not available';
2931: &Apache::lonnet::logthis('unable to retrieve environment '.
2932: 'for '.$sname.':'.$sdom);
2933: } else {
2934: $fullname = &ProcessFullName(@info{qw/lastname generation
2935: firstname middlename/});
2936: $id = $info{'id'};
2937: }
2938: # Update the classlist with this students information
2939: if ($fullname ne 'not available') {
2940: my $enrolldata = join(':',$end,$start,$id,$section,$fullname);
2941: my $reply=&Apache::lonnet::cput('classlist',
2942: {$student => $enrolldata},
2943: $cdom,$cnum);
2944: if ($reply !~ /^(ok|delayed)/) {
2945: &Apache::lonnet::logthis('Unable to update classlist for '.
2946: 'student '.$sname.':'.$sdom.
2947: ' error:'.$reply);
2948: }
2949: }
2950: }
2951: my $status='Expired';
2952: if(((!$end) || $now < $end) && ((!$start) || ($now > $start))) {
2953: $status='Active';
2954: }
2955: $classlist{$student} =
2956: [$sdom,$sname,$end,$start,$id,$section,$fullname,$status,$type];
2957: }
2958: if (wantarray()) {
2959: return (\%classlist,['domain','username','end','start','id',
2960: 'section','fullname','status','type']);
2961: } else {
2962: return \%classlist;
2963: }
2964: }
2965:
2966: # ----- END HELPER FUNCTIONS --------------------------------------------
2967:
2968: 1;
2969: __END__
2970:
2971:
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