1: # The LearningOnline Network with CAPA
2: #
3: # $Id: loncoursedata.pm,v 1.137 2004/07/06 15:50:03 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: $partdata{$part}->{'Survey'} = $curRes->is_survey($part);
203: # Count how many responses of each type there are in this part
204: foreach (@Responses) {
205: $partdata{$part}->{$_}++;
206: }
207: }
208: my $assessment = { title => $title,
209: src => $src,
210: symb => $symb,
211: type => 'assessment',
212: parts => $parts,
213: num_parts => scalar(@$parts),
214: partdata => \%partdata,
215: };
216: push(@Assessments,$assessment);
217: push(@{$currentmap->{'contents'}},$assessment);
218: $currentmap->{'num_assess'}++;
219: $currentmap->{'num_assess_parts'}+= scalar(@$parts);
220: }
221: $navmap->untieHashes();
222: return ($top,\@Sequences,\@Assessments);
223: }
224:
225: sub LoadDiscussion {
226: my ($courseID)=@_;
227: my %Discuss=();
228: my %contrib=&Apache::lonnet::dump(
229: $courseID,
230: $ENV{'course.'.$courseID.'.domain'},
231: $ENV{'course.'.$courseID.'.num'});
232:
233: #my %contrib=&DownloadCourseInformation($name, $courseID, 0);
234:
235: foreach my $temp(keys %contrib) {
236: if ($temp=~/^version/) {
237: my $ver=$contrib{$temp};
238: my ($dummy,$prb)=split(':',$temp);
239: for (my $idx=1; $idx<=$ver; $idx++ ) {
240: my $name=$contrib{"$idx:$prb:sendername"};
241: $Discuss{"$name:$prb"}=$idx;
242: }
243: }
244: }
245:
246: return \%Discuss;
247: }
248:
249: ################################################
250: ################################################
251:
252: =pod
253:
254: =item &GetUserName(username,userdomain)
255:
256: Returns a hash with the following entries:
257: 'firstname', 'middlename', 'lastname', 'generation', and 'fullname'
258:
259: 'fullname' is the result of &Apache::loncoursedata::ProcessFullName.
260:
261: =cut
262:
263: ################################################
264: ################################################
265: sub GetUserName {
266: my ($username,$userdomain) = @_;
267: $username = $ENV{'user.name'} if (! defined($username));
268: $userdomain = $ENV{'user.domain'} if (! defined($username));
269: my %userenv = &Apache::lonnet::get('environment',
270: ['firstname','middlename','lastname','generation'],
271: $userdomain,$username);
272: $userenv{'fullname'} = &ProcessFullName($userenv{'lastname'},
273: $userenv{'generation'},
274: $userenv{'firstname'},
275: $userenv{'middlename'});
276: return %userenv;
277: }
278:
279: ################################################
280: ################################################
281:
282: =pod
283:
284: =item &ProcessFullName()
285:
286: Takes lastname, generation, firstname, and middlename (or some partial
287: set of this data) and returns the full name version as a string. Format
288: is Lastname generation, firstname middlename or a subset of this.
289:
290: =cut
291:
292: ################################################
293: ################################################
294: sub ProcessFullName {
295: my ($lastname, $generation, $firstname, $middlename)=@_;
296: my $Str = '';
297:
298: # Strip whitespace preceeding & following name components.
299: $lastname =~ s/(\s+$|^\s+)//g;
300: $generation =~ s/(\s+$|^\s+)//g;
301: $firstname =~ s/(\s+$|^\s+)//g;
302: $middlename =~ s/(\s+$|^\s+)//g;
303:
304: if($lastname ne '') {
305: $Str .= $lastname;
306: $Str .= ' '.$generation if ($generation ne '');
307: $Str .= ',';
308: $Str .= ' '.$firstname if ($firstname ne '');
309: $Str .= ' '.$middlename if ($middlename ne '');
310: } else {
311: $Str .= $firstname if ($firstname ne '');
312: $Str .= ' '.$middlename if ($middlename ne '');
313: $Str .= ' '.$generation if ($generation ne '');
314: }
315:
316: return $Str;
317: }
318:
319: ################################################
320: ################################################
321:
322: =pod
323:
324: =item &make_into_hash($values);
325:
326: Returns a reference to a hash as described by $values. $values is
327: assumed to be the result of
328: join(':',map {&Apache::lonnet::escape($_)} %orighash);
329:
330: This is a helper function for get_current_state.
331:
332: =cut
333:
334: ################################################
335: ################################################
336: sub make_into_hash {
337: my $values = shift;
338: my %tmp = map { &Apache::lonnet::unescape($_); }
339: split(':',$values);
340: return \%tmp;
341: }
342:
343:
344: ################################################
345: ################################################
346:
347: =pod
348:
349: =head1 LOCAL DATA CACHING SUBROUTINES
350:
351: The local caching is done using MySQL. There is no fall-back implementation
352: if MySQL is not running.
353:
354: The programmers interface is to call &get_current_state() or some other
355: primary interface subroutine (described below). The internals of this
356: storage system are documented here.
357:
358: There are six tables used to store student performance data (the results of
359: a dumpcurrent). Each of these tables is created in MySQL with a name of
360: $courseid_*****, where ***** is 'symb', 'part', or whatever is appropriate
361: for the table. The tables and their purposes are described below.
362:
363: Some notes before we get started.
364:
365: Each table must have a PRIMARY KEY, which is a column or set of columns which
366: will serve to uniquely identify a row of data. NULL is not allowed!
367:
368: INDEXes work best on integer data.
369:
370: JOIN is used to combine data from many tables into one output.
371:
372: lonmysql.pm is used for some of the interface, specifically the table creation
373: calls. The inserts are done in bulk by directly calling the database handler.
374: The SELECT ... JOIN statement used to retrieve the data does not have an
375: interface in lonmysql.pm and I shudder at the thought of writing one.
376:
377: =head3 Table Descriptions
378:
379: =over 4
380:
381: =item Tables used to store meta information
382:
383: The following tables hold data required to keep track of the current status
384: of a students data in the tables or to look up the students data in the tables.
385:
386: =over 4
387:
388: =item $symb_table
389:
390: The symb_table has two columns. The first is a 'symb_id' and the second
391: is the text name for the 'symb' (limited to 64k). The 'symb_id' is generated
392: automatically by MySQL so inserts should be done on this table with an
393: empty first element. This table has its PRIMARY KEY on the 'symb_id'.
394:
395: =item $part_table
396:
397: The part_table has two columns. The first is a 'part_id' and the second
398: is the text name for the 'part' (limited to 100 characters). The 'part_id' is
399: generated automatically by MySQL so inserts should be done on this table with
400: an empty first element. This table has its PRIMARY KEY on the 'part' (100
401: characters) and a KEY on 'part_id'.
402:
403: =item $student_table
404:
405: The student_table has 7 columns. The first is a 'student_id' assigned by
406: MySQL. The second is 'student' which is username:domain. The third through
407: fifth are 'section', 'status' (enrollment status), and 'classification'
408: (to be used in the future). The sixth and seventh ('updatetime' and
409: 'fullupdatetime') contain the time of last update and full update of student
410: data. This table has its PRIMARY KEY on the 'student_id' column and is indexed
411: on 'student', 'section', and 'status'.
412:
413: =back
414:
415: =item Tables used to store current status data
416:
417: The following tables store data only about the students current status on
418: a problem, meaning only the data related to the last attempt on a problem.
419:
420: =over 4
421:
422: =item $performance_table
423:
424: The performance_table has 9 columns. The first three are 'symb_id',
425: 'student_id', and 'part_id'. These comprise the PRIMARY KEY for this table
426: and are directly related to the $symb_table, $student_table, and $part_table
427: described above. MySQL does better indexing on numeric items than text,
428: so we use these three "index tables". The remaining columns are
429: 'solved', 'tries', 'awarded', 'award', 'awarddetail', and 'timestamp'.
430: These are either the MySQL type TINYTEXT or various integers ('tries' and
431: 'timestamp'). This table has KEYs of 'student_id' and 'symb_id'.
432: For use of this table, see the functions described below.
433:
434: =item $parameters_table
435:
436: The parameters_table holds the data that does not fit neatly into the
437: performance_table. The parameters table has four columns: 'symb_id',
438: 'student_id', 'parameter', and 'value'. 'symb_id', 'student_id', and
439: 'parameter' comprise the PRIMARY KEY for this table. 'parameter' is
440: limited to 255 characters. 'value' is limited to 64k characters.
441:
442: =back
443:
444: =item Tables used for storing historic data
445:
446: The following tables are used to store almost all of the transactions a student
447: has made on a homework problem. See loncapa/docs/homework/datastorage for
448: specific information about each of the parameters stored.
449:
450: =over 4
451:
452: =item $fulldump_response_table
453:
454: The response table holds data (documented in loncapa/docs/homework/datastorage)
455: associated with a particular response id which is stored when a student
456: attempts a problem. The following are the columns of the table, in order:
457: 'symb_id','part_id','response_id','student_id','transaction','tries',
458: 'awarddetail', 'response_specific' (data particular to the response
459: type), 'response_specific_value', and 'submission (the text of the students
460: submission). The primary key is based on the first five columns listed above.
461:
462: =item $fulldump_part_table
463:
464: The part table holds data (documented in loncapa/docs/homework/datastorage)
465: associated with a particular part id which is stored when a student attempts
466: a problem. The following are the columns of the table, in order:
467: 'symb_id','part_id','student_id','transaction','tries','award','awarded',
468: and 'previous'. The primary key is based on the first five columns listed
469: above.
470:
471: =item $fulldump_timestamp_table
472:
473: The timestamp table holds the timestamps of the transactions which are
474: stored in $fulldump_response_table and $fulldump_part_table. This data is
475: about both the response and part data. Columns: 'symb_id','student_id',
476: 'transaction', and 'timestamp'.
477: The primary key is based on the first 3 columns.
478:
479: =item $weight_table
480:
481: The weight table holds the weight for the problems used in the class.
482: Whereas the weight of a problem can vary by section and student the data
483: here is applied to the class as a whole.
484: Columns: 'symb_id','part_id','response_id','weight'.
485:
486: =back
487:
488: =back
489:
490: =head3 Important Subroutines
491:
492: Here is a brief overview of the subroutines which are likely to be of
493: interest:
494:
495: =over 4
496:
497: =item &get_current_state(): programmers interface.
498:
499: =item &init_dbs(): table creation
500:
501: =item &update_student_data(): data storage calls
502:
503: =item &get_student_data_from_performance_cache(): data retrieval
504:
505: =back
506:
507: =head3 Main Documentation
508:
509: =over 4
510:
511: =cut
512:
513: ################################################
514: ################################################
515:
516: ################################################
517: ################################################
518: { # Begin scope of table identifiers
519:
520: my $current_course ='';
521: my $symb_table;
522: my $part_table;
523: my $student_table;
524: my $performance_table;
525: my $parameters_table;
526: my $fulldump_response_table;
527: my $fulldump_part_table;
528: my $fulldump_timestamp_table;
529: my $weight_table;
530:
531: my @Tables;
532: ################################################
533: ################################################
534:
535: =pod
536:
537: =item &init_dbs()
538:
539: Input: course id
540:
541: Output: 0 on success, positive integer on error
542:
543: This routine issues the calls to lonmysql to create the tables used to
544: store student data.
545:
546: =cut
547:
548: ################################################
549: ################################################
550: sub init_dbs {
551: my ($courseid,$drop) = @_;
552: &setup_table_names($courseid);
553: #
554: # Drop any of the existing tables
555: if ($drop) {
556: foreach my $table (@Tables) {
557: &Apache::lonmysql::drop_table($table);
558: }
559: }
560: #
561: # Note - changes to this table must be reflected in the code that
562: # stores the data (calls &Apache::lonmysql::store_row with this table
563: # id
564: my $symb_table_def = {
565: id => $symb_table,
566: permanent => 'no',
567: columns => [{ name => 'symb_id',
568: type => 'MEDIUMINT UNSIGNED',
569: restrictions => 'NOT NULL',
570: auto_inc => 'yes', },
571: { name => 'symb',
572: type => 'MEDIUMTEXT',
573: restrictions => 'NOT NULL'},
574: ],
575: 'PRIMARY KEY' => ['symb_id'],
576: };
577: #
578: my $part_table_def = {
579: id => $part_table,
580: permanent => 'no',
581: columns => [{ name => 'part_id',
582: type => 'MEDIUMINT UNSIGNED',
583: restrictions => 'NOT NULL',
584: auto_inc => 'yes', },
585: { name => 'part',
586: type => 'VARCHAR(100) BINARY',
587: restrictions => 'NOT NULL'},
588: ],
589: 'PRIMARY KEY' => ['part (100)'],
590: 'KEY' => [{ columns => ['part_id']},],
591: };
592: #
593: my $student_table_def = {
594: id => $student_table,
595: permanent => 'no',
596: columns => [{ name => 'student_id',
597: type => 'MEDIUMINT UNSIGNED',
598: restrictions => 'NOT NULL',
599: auto_inc => 'yes', },
600: { name => 'student',
601: type => 'VARCHAR(100) BINARY',
602: restrictions => 'NOT NULL UNIQUE'},
603: { name => 'section',
604: type => 'VARCHAR(100) BINARY',
605: restrictions => 'NOT NULL'},
606: { name => 'status',
607: type => 'VARCHAR(15) BINARY',
608: restrictions => 'NOT NULL'},
609: { name => 'classification',
610: type => 'VARCHAR(100) BINARY', },
611: { name => 'updatetime',
612: type => 'INT UNSIGNED'},
613: { name => 'fullupdatetime',
614: type => 'INT UNSIGNED'},
615: ],
616: 'PRIMARY KEY' => ['student_id'],
617: 'KEY' => [{ columns => ['student (100)',
618: 'section (100)',
619: 'status (15)',]},],
620: };
621: #
622: my $performance_table_def = {
623: id => $performance_table,
624: permanent => 'no',
625: columns => [{ name => 'symb_id',
626: type => 'MEDIUMINT UNSIGNED',
627: restrictions => 'NOT NULL' },
628: { name => 'student_id',
629: type => 'MEDIUMINT UNSIGNED',
630: restrictions => 'NOT NULL' },
631: { name => 'part_id',
632: type => 'MEDIUMINT UNSIGNED',
633: restrictions => 'NOT NULL' },
634: { name => 'part',
635: type => 'VARCHAR(100) BINARY',
636: restrictions => 'NOT NULL'},
637: { name => 'solved',
638: type => 'TINYTEXT' },
639: { name => 'tries',
640: type => 'SMALLINT UNSIGNED' },
641: { name => 'awarded',
642: type => 'REAL' },
643: { name => 'award',
644: type => 'TINYTEXT' },
645: { name => 'awarddetail',
646: type => 'TINYTEXT' },
647: { name => 'timestamp',
648: type => 'INT UNSIGNED'},
649: ],
650: 'PRIMARY KEY' => ['symb_id','student_id','part_id'],
651: 'KEY' => [{ columns=>['student_id'] },
652: { columns=>['symb_id'] },],
653: };
654: #
655: my $fulldump_part_table_def = {
656: id => $fulldump_part_table,
657: permanent => 'no',
658: columns => [
659: { name => 'symb_id',
660: type => 'MEDIUMINT UNSIGNED',
661: restrictions => 'NOT NULL' },
662: { name => 'part_id',
663: type => 'MEDIUMINT UNSIGNED',
664: restrictions => 'NOT NULL' },
665: { name => 'student_id',
666: type => 'MEDIUMINT UNSIGNED',
667: restrictions => 'NOT NULL' },
668: { name => 'transaction',
669: type => 'MEDIUMINT UNSIGNED',
670: restrictions => 'NOT NULL' },
671: { name => 'tries',
672: type => 'SMALLINT UNSIGNED',
673: restrictions => 'NOT NULL' },
674: { name => 'award',
675: type => 'TINYTEXT' },
676: { name => 'awarded',
677: type => 'REAL' },
678: { name => 'previous',
679: type => 'SMALLINT UNSIGNED' },
680: # { name => 'regrader',
681: # type => 'TINYTEXT' },
682: # { name => 'afterduedate',
683: # type => 'TINYTEXT' },
684: ],
685: 'PRIMARY KEY' => ['symb_id','part_id','student_id','transaction'],
686: 'KEY' => [
687: { columns=>['symb_id'] },
688: { columns=>['part_id'] },
689: { columns=>['student_id'] },
690: ],
691: };
692: #
693: my $fulldump_response_table_def = {
694: id => $fulldump_response_table,
695: permanent => 'no',
696: columns => [
697: { name => 'symb_id',
698: type => 'MEDIUMINT UNSIGNED',
699: restrictions => 'NOT NULL' },
700: { name => 'part_id',
701: type => 'MEDIUMINT UNSIGNED',
702: restrictions => 'NOT NULL' },
703: { name => 'response_id',
704: type => 'MEDIUMINT UNSIGNED',
705: restrictions => 'NOT NULL' },
706: { name => 'student_id',
707: type => 'MEDIUMINT UNSIGNED',
708: restrictions => 'NOT NULL' },
709: { name => 'transaction',
710: type => 'MEDIUMINT UNSIGNED',
711: restrictions => 'NOT NULL' },
712: { name => 'awarddetail',
713: type => 'TINYTEXT' },
714: # { name => 'message',
715: # type => 'CHAR BINARY'},
716: { name => 'response_specific',
717: type => 'TINYTEXT' },
718: { name => 'response_specific_value',
719: type => 'TINYTEXT' },
720: { name => 'submission',
721: type => 'TEXT'},
722: ],
723: 'PRIMARY KEY' => ['symb_id','part_id','response_id','student_id',
724: 'transaction'],
725: 'KEY' => [
726: { columns=>['symb_id'] },
727: { columns=>['part_id','response_id'] },
728: { columns=>['student_id'] },
729: ],
730: };
731: my $fulldump_timestamp_table_def = {
732: id => $fulldump_timestamp_table,
733: permanent => 'no',
734: columns => [
735: { name => 'symb_id',
736: type => 'MEDIUMINT UNSIGNED',
737: restrictions => 'NOT NULL' },
738: { name => 'student_id',
739: type => 'MEDIUMINT UNSIGNED',
740: restrictions => 'NOT NULL' },
741: { name => 'transaction',
742: type => 'MEDIUMINT UNSIGNED',
743: restrictions => 'NOT NULL' },
744: { name => 'timestamp',
745: type => 'INT UNSIGNED'},
746: ],
747: 'PRIMARY KEY' => ['symb_id','student_id','transaction'],
748: 'KEY' => [
749: { columns=>['symb_id'] },
750: { columns=>['student_id'] },
751: { columns=>['transaction'] },
752: ],
753: };
754: #
755: my $parameters_table_def = {
756: id => $parameters_table,
757: permanent => 'no',
758: columns => [{ name => 'symb_id',
759: type => 'MEDIUMINT UNSIGNED',
760: restrictions => 'NOT NULL' },
761: { name => 'student_id',
762: type => 'MEDIUMINT UNSIGNED',
763: restrictions => 'NOT NULL' },
764: { name => 'parameter',
765: type => 'TINYTEXT',
766: restrictions => 'NOT NULL' },
767: { name => 'value',
768: type => 'MEDIUMTEXT' },
769: ],
770: 'PRIMARY KEY' => ['symb_id','student_id','parameter (255)'],
771: };
772: #
773: my $weight_table_def = {
774: id => $weight_table,
775: permanent => 'no',
776: columns => [{ name => 'symb_id',
777: type => 'MEDIUMINT UNSIGNED',
778: restrictions => 'NOT NULL' },
779: { name => 'part_id',
780: type => 'MEDIUMINT UNSIGNED',
781: restrictions => 'NOT NULL' },
782: { name => 'weight',
783: type => 'REAL',
784: restrictions => 'NOT NULL' },
785: ],
786: 'PRIMARY KEY' => ['symb_id','part_id'],
787: };
788: #
789: # Create the tables
790: my $tableid;
791: $tableid = &Apache::lonmysql::create_table($symb_table_def);
792: if (! defined($tableid)) {
793: &Apache::lonnet::logthis("error creating symb_table: ".
794: &Apache::lonmysql::get_error());
795: return 1;
796: }
797: #
798: $tableid = &Apache::lonmysql::create_table($part_table_def);
799: if (! defined($tableid)) {
800: &Apache::lonnet::logthis("error creating part_table: ".
801: &Apache::lonmysql::get_error());
802: return 2;
803: }
804: #
805: $tableid = &Apache::lonmysql::create_table($student_table_def);
806: if (! defined($tableid)) {
807: &Apache::lonnet::logthis("error creating student_table: ".
808: &Apache::lonmysql::get_error());
809: return 3;
810: }
811: #
812: $tableid = &Apache::lonmysql::create_table($performance_table_def);
813: if (! defined($tableid)) {
814: &Apache::lonnet::logthis("error creating preformance_table: ".
815: &Apache::lonmysql::get_error());
816: return 5;
817: }
818: #
819: $tableid = &Apache::lonmysql::create_table($parameters_table_def);
820: if (! defined($tableid)) {
821: &Apache::lonnet::logthis("error creating parameters_table: ".
822: &Apache::lonmysql::get_error());
823: return 6;
824: }
825: #
826: $tableid = &Apache::lonmysql::create_table($fulldump_part_table_def);
827: if (! defined($tableid)) {
828: &Apache::lonnet::logthis("error creating fulldump_part_table: ".
829: &Apache::lonmysql::get_error());
830: return 7;
831: }
832: #
833: $tableid = &Apache::lonmysql::create_table($fulldump_response_table_def);
834: if (! defined($tableid)) {
835: &Apache::lonnet::logthis("error creating fulldump_response_table: ".
836: &Apache::lonmysql::get_error());
837: return 8;
838: }
839: $tableid = &Apache::lonmysql::create_table($fulldump_timestamp_table_def);
840: if (! defined($tableid)) {
841: &Apache::lonnet::logthis("error creating fulldump_timestamp_table: ".
842: &Apache::lonmysql::get_error());
843: return 9;
844: }
845: $tableid = &Apache::lonmysql::create_table($weight_table_def);
846: if (! defined($tableid)) {
847: &Apache::lonnet::logthis("error creating weight_table: ".
848: &Apache::lonmysql::get_error());
849: return 10;
850: }
851: return 0;
852: }
853:
854: ################################################
855: ################################################
856:
857: =pod
858:
859: =item &delete_caches()
860:
861: =cut
862:
863: ################################################
864: ################################################
865: sub delete_caches {
866: my $courseid = shift;
867: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
868: #
869: &setup_table_names($courseid);
870: #
871: my $dbh = &Apache::lonmysql::get_dbh();
872: foreach my $table (@Tables) {
873: my $command = 'DROP TABLE '.$table.';';
874: $dbh->do($command);
875: if ($dbh->err) {
876: &Apache::lonnet::logthis($command.' resulted in error: '.$dbh->errstr);
877: }
878: }
879: return;
880: }
881:
882: ################################################
883: ################################################
884:
885: =pod
886:
887: =item &get_part_id()
888:
889: Get the MySQL id of a problem part string.
890:
891: Input: $part
892:
893: Output: undef on error, integer $part_id on success.
894:
895: =item &get_part()
896:
897: Get the string describing a part from the MySQL id of the problem part.
898:
899: Input: $part_id
900:
901: Output: undef on error, $part string on success.
902:
903: =cut
904:
905: ################################################
906: ################################################
907:
908: my $have_read_part_table = 0;
909: my %ids_by_part;
910: my %parts_by_id;
911:
912: sub get_part_id {
913: my ($part) = @_;
914: $part = 0 if (! defined($part));
915: if (! $have_read_part_table) {
916: my @Result = &Apache::lonmysql::get_rows($part_table);
917: foreach (@Result) {
918: $ids_by_part{$_->[1]}=$_->[0];
919: }
920: $have_read_part_table = 1;
921: }
922: if (! exists($ids_by_part{$part})) {
923: &Apache::lonmysql::store_row($part_table,[undef,$part]);
924: undef(%ids_by_part);
925: my @Result = &Apache::lonmysql::get_rows($part_table);
926: foreach (@Result) {
927: $ids_by_part{$_->[1]}=$_->[0];
928: }
929: }
930: return $ids_by_part{$part} if (exists($ids_by_part{$part}));
931: return undef; # error
932: }
933:
934: sub get_part {
935: my ($part_id) = @_;
936: if (! exists($parts_by_id{$part_id}) ||
937: ! defined($parts_by_id{$part_id}) ||
938: $parts_by_id{$part_id} eq '') {
939: my @Result = &Apache::lonmysql::get_rows($part_table);
940: foreach (@Result) {
941: $parts_by_id{$_->[0]}=$_->[1];
942: }
943: }
944: return $parts_by_id{$part_id} if(exists($parts_by_id{$part_id}));
945: return undef; # error
946: }
947:
948: ################################################
949: ################################################
950:
951: =pod
952:
953: =item &get_symb_id()
954:
955: Get the MySQL id of a symb.
956:
957: Input: $symb
958:
959: Output: undef on error, integer $symb_id on success.
960:
961: =item &get_symb()
962:
963: Get the symb associated with a MySQL symb_id.
964:
965: Input: $symb_id
966:
967: Output: undef on error, $symb on success.
968:
969: =cut
970:
971: ################################################
972: ################################################
973:
974: my $have_read_symb_table = 0;
975: my %ids_by_symb;
976: my %symbs_by_id;
977:
978: sub get_symb_id {
979: my ($symb) = @_;
980: if (! $have_read_symb_table) {
981: my @Result = &Apache::lonmysql::get_rows($symb_table);
982: foreach (@Result) {
983: $ids_by_symb{$_->[1]}=$_->[0];
984: }
985: $have_read_symb_table = 1;
986: }
987: if (! exists($ids_by_symb{$symb})) {
988: &Apache::lonmysql::store_row($symb_table,[undef,$symb]);
989: undef(%ids_by_symb);
990: my @Result = &Apache::lonmysql::get_rows($symb_table);
991: foreach (@Result) {
992: $ids_by_symb{$_->[1]}=$_->[0];
993: }
994: }
995: return $ids_by_symb{$symb} if(exists( $ids_by_symb{$symb}));
996: return undef; # error
997: }
998:
999: sub get_symb {
1000: my ($symb_id) = @_;
1001: if (! exists($symbs_by_id{$symb_id}) ||
1002: ! defined($symbs_by_id{$symb_id}) ||
1003: $symbs_by_id{$symb_id} eq '') {
1004: my @Result = &Apache::lonmysql::get_rows($symb_table);
1005: foreach (@Result) {
1006: $symbs_by_id{$_->[0]}=$_->[1];
1007: }
1008: }
1009: return $symbs_by_id{$symb_id} if(exists( $symbs_by_id{$symb_id}));
1010: return undef; # error
1011: }
1012:
1013: ################################################
1014: ################################################
1015:
1016: =pod
1017:
1018: =item &get_student_id()
1019:
1020: Get the MySQL id of a student.
1021:
1022: Input: $sname, $dom
1023:
1024: Output: undef on error, integer $student_id on success.
1025:
1026: =item &get_student()
1027:
1028: Get student username:domain associated with the MySQL student_id.
1029:
1030: Input: $student_id
1031:
1032: Output: undef on error, string $student (username:domain) on success.
1033:
1034: =cut
1035:
1036: ################################################
1037: ################################################
1038:
1039: my $have_read_student_table = 0;
1040: my %ids_by_student;
1041: my %students_by_id;
1042:
1043: sub get_student_id {
1044: my ($sname,$sdom) = @_;
1045: my $student = $sname.':'.$sdom;
1046: if (! $have_read_student_table) {
1047: my @Result = &Apache::lonmysql::get_rows($student_table);
1048: foreach (@Result) {
1049: $ids_by_student{$_->[1]}=$_->[0];
1050: }
1051: $have_read_student_table = 1;
1052: }
1053: if (! exists($ids_by_student{$student})) {
1054: &populate_student_table();
1055: undef(%ids_by_student);
1056: undef(%students_by_id);
1057: my @Result = &Apache::lonmysql::get_rows($student_table);
1058: foreach (@Result) {
1059: $ids_by_student{$_->[1]}=$_->[0];
1060: }
1061: }
1062: return $ids_by_student{$student} if(exists( $ids_by_student{$student}));
1063: return undef; # error
1064: }
1065:
1066: sub get_student {
1067: my ($student_id) = @_;
1068: if (! exists($students_by_id{$student_id}) ||
1069: ! defined($students_by_id{$student_id}) ||
1070: $students_by_id{$student_id} eq '') {
1071: my @Result = &Apache::lonmysql::get_rows($student_table);
1072: foreach (@Result) {
1073: $students_by_id{$_->[0]}=$_->[1];
1074: }
1075: }
1076: return $students_by_id{$student_id} if(exists($students_by_id{$student_id}));
1077: return undef; # error
1078: }
1079:
1080: sub populate_student_table {
1081: my ($courseid) = @_;
1082: if (! defined($courseid)) {
1083: $courseid = $ENV{'request.course.id'};
1084: }
1085: #
1086: &setup_table_names($courseid);
1087: &init_dbs($courseid,0);
1088: my $dbh = &Apache::lonmysql::get_dbh();
1089: my $request = 'INSERT IGNORE INTO '.$student_table.
1090: "(student,section,status) VALUES ";
1091: my $classlist = &get_classlist($courseid);
1092: my $student_count=0;
1093: while (my ($student,$data) = each %$classlist) {
1094: my ($section,$status) = ($data->[&CL_SECTION()],
1095: $data->[&CL_STATUS()]);
1096: if ($section eq '' || $section =~ /^\s*$/) {
1097: $section = 'none';
1098: }
1099: $request .= "('".$student."','".$section."','".$status."'),";
1100: $student_count++;
1101: }
1102: return if ($student_count == 0);
1103: chop($request);
1104: $dbh->do($request);
1105: if ($dbh->err()) {
1106: &Apache::lonnet::logthis("error ".$dbh->errstr().
1107: " occured executing \n".
1108: $request);
1109: }
1110: return;
1111: }
1112:
1113: ################################################
1114: ################################################
1115:
1116: =pod
1117:
1118: =item &clear_internal_caches()
1119:
1120: Causes the internal caches used in get_student_id, get_student,
1121: get_symb_id, get_symb, get_part_id, and get_part to be undef'd.
1122:
1123: Needs to be called before the first operation with the MySQL database
1124: for a given Apache request.
1125:
1126: =cut
1127:
1128: ################################################
1129: ################################################
1130: sub clear_internal_caches {
1131: $have_read_part_table = 0;
1132: undef(%ids_by_part);
1133: undef(%parts_by_id);
1134: $have_read_symb_table = 0;
1135: undef(%ids_by_symb);
1136: undef(%symbs_by_id);
1137: $have_read_student_table = 0;
1138: undef(%ids_by_student);
1139: undef(%students_by_id);
1140: }
1141:
1142:
1143: ################################################
1144: ################################################
1145:
1146: =pod
1147:
1148: =item &update_full_student_data($sname,$sdom,$courseid)
1149:
1150: Does a lonnet::dump on a student to populate the courses tables.
1151:
1152: Input: $sname, $sdom, $courseid
1153:
1154: Output: $returnstatus
1155:
1156: $returnstatus is a string describing any errors that occured. 'okay' is the
1157: default.
1158:
1159: This subroutine loads a students data using lonnet::dump and inserts
1160: it into the MySQL database. The inserts are done on three tables,
1161: $fulldump_response_table, $fulldump_part_table, and $fulldump_timestamp_table.
1162: The INSERT calls are made directly by this subroutine, not through lonmysql
1163: because we do a 'bulk'insert which takes advantage of MySQLs non-SQL
1164: compliant INSERT command to insert multiple rows at a time.
1165: If anything has gone wrong during this process, $returnstatus is updated with
1166: a description of the error.
1167:
1168: Once the "fulldump" tables are updated, the tables used for chart and
1169: spreadsheet (which hold only the current state of the student on their
1170: homework, not historical data) are updated. If all updates have occured
1171: successfully, $student_table is updated to reflect the time of the update.
1172:
1173: Notice we do not insert the data and immediately query it. This means it
1174: is possible for there to be data returned this first time that is not
1175: available the second time. CYA.
1176:
1177: =cut
1178:
1179: ################################################
1180: ################################################
1181: sub update_full_student_data {
1182: my ($sname,$sdom,$courseid) = @_;
1183: #
1184: # Set up database names
1185: &setup_table_names($courseid);
1186: #
1187: my $student_id = &get_student_id($sname,$sdom);
1188: my $student = $sname.':'.$sdom;
1189: #
1190: my $returnstatus = 'okay';
1191: #
1192: # Download students data
1193: my $time_of_retrieval = time;
1194: my @tmp = &Apache::lonnet::dump($courseid,$sdom,$sname);
1195: if (@tmp && $tmp[0] =~ /^error/) {
1196: $returnstatus = 'error retrieving full student data';
1197: return $returnstatus;
1198: } elsif (! @tmp) {
1199: $returnstatus = 'okay: no student data';
1200: return $returnstatus;
1201: }
1202: my %studentdata = @tmp;
1203: #
1204: # Get database handle and clean out the tables
1205: my $dbh = &Apache::lonmysql::get_dbh();
1206: $dbh->do('DELETE FROM '.$fulldump_response_table.' WHERE student_id='.
1207: $student_id);
1208: $dbh->do('DELETE FROM '.$fulldump_part_table.' WHERE student_id='.
1209: $student_id);
1210: $dbh->do('DELETE FROM '.$fulldump_timestamp_table.' WHERE student_id='.
1211: $student_id);
1212: #
1213: # Parse and store the data into a form we can handle
1214: my $partdata;
1215: my $respdata;
1216: while (my ($key,$value) = each(%studentdata)) {
1217: next if ($key =~ /^(\d+):(resource$|subnum$|keys:)/);
1218: my ($transaction,$symb,$parameter) = split(':',$key);
1219: my $symb_id = &get_symb_id($symb);
1220: if ($parameter eq 'timestamp') {
1221: # We can deal with 'timestamp' right away
1222: my @timestamp_storage = ($symb_id,$student_id,
1223: $transaction,$value);
1224: my $store_command = 'INSERT IGNORE INTO '.$fulldump_timestamp_table.
1225: " VALUES ('".join("','",@timestamp_storage)."');";
1226: $dbh->do($store_command);
1227: if ($dbh->err()) {
1228: &Apache::lonnet::logthis('unable to execute '.$store_command);
1229: &Apache::lonnet::logthis($dbh->errstr());
1230: }
1231: next;
1232: } elsif ($parameter eq 'version') {
1233: next;
1234: } elsif ($parameter =~ /^resource\.(.*)\.(tries|
1235: award|
1236: awarded|
1237: previous|
1238: solved|
1239: awarddetail|
1240: submission|
1241: submissiongrading|
1242: molecule)\s*$/x){
1243: # we do not have enough information to store an
1244: # entire row, so we save it up until later.
1245: my ($part_and_resp_id,$field) = ($1,$2);
1246: my ($part,$part_id,$resp,$resp_id);
1247: if ($part_and_resp_id =~ /\./) {
1248: ($part,$resp) = split(/\./,$part_and_resp_id);
1249: $part_id = &get_part_id($part);
1250: $resp_id = &get_part_id($resp);
1251: } else {
1252: $part_id = &get_part_id($part_and_resp_id);
1253: }
1254: # Deal with part specific data
1255: if ($field =~ /^(tries|award|awarded|previous)$/) {
1256: $partdata->{$symb_id}->{$part_id}->{$transaction}->{$field}=$value;
1257: }
1258: # deal with response specific data
1259: if (defined($resp_id) &&
1260: $field =~ /^(awarddetail|
1261: submission|
1262: submissiongrading|
1263: molecule)$/x) {
1264: if ($field eq 'submission') {
1265: # We have to be careful with user supplied input.
1266: # most of the time we are okay because it is escaped.
1267: # However, there is one wrinkle: submissions which end in
1268: # and odd number of '\' cause insert errors to occur.
1269: # Best trap this somehow...
1270: $value = $dbh->quote($value);
1271: }
1272: if ($field eq 'submissiongrading' ||
1273: $field eq 'molecule') {
1274: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific'}=$field;
1275: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific_value'}=$value;
1276: } else {
1277: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{$field}=$value;
1278: }
1279: }
1280: }
1281: }
1282: ##
1283: ## Store the part data
1284: my $store_command = 'INSERT IGNORE INTO '.$fulldump_part_table.
1285: ' VALUES '."\n";
1286: my $store_rows = 0;
1287: while (my ($symb_id,$hash1) = each (%$partdata)) {
1288: while (my ($part_id,$hash2) = each (%$hash1)) {
1289: while (my ($transaction,$data) = each (%$hash2)) {
1290: $store_command .= "('".join("','",$symb_id,$part_id,
1291: $student_id,
1292: $transaction,
1293: $data->{'tries'},
1294: $data->{'award'},
1295: $data->{'awarded'},
1296: $data->{'previous'})."'),";
1297: $store_rows++;
1298: }
1299: }
1300: }
1301: if ($store_rows) {
1302: chop($store_command);
1303: $dbh->do($store_command);
1304: if ($dbh->err) {
1305: $returnstatus = 'error storing part data';
1306: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
1307: &Apache::lonnet::logthis("While attempting\n".$store_command);
1308: }
1309: }
1310: ##
1311: ## Store the response data
1312: $store_command = 'INSERT IGNORE INTO '.$fulldump_response_table.
1313: ' VALUES '."\n";
1314: $store_rows = 0;
1315: while (my ($symb_id,$hash1) = each (%$respdata)) {
1316: while (my ($part_id,$hash2) = each (%$hash1)) {
1317: while (my ($resp_id,$hash3) = each (%$hash2)) {
1318: while (my ($transaction,$data) = each (%$hash3)) {
1319: my $submission = $data->{'submission'};
1320: # We have to be careful with user supplied input.
1321: # most of the time we are okay because it is escaped.
1322: # However, there is one wrinkle: submissions which end in
1323: # and odd number of '\' cause insert errors to occur.
1324: # Best trap this somehow...
1325: $submission = $dbh->quote($submission);
1326: $store_command .= "('".
1327: join("','",$symb_id,$part_id,
1328: $resp_id,$student_id,
1329: $transaction,
1330: $data->{'awarddetail'},
1331: $data->{'response_specific'},
1332: $data->{'response_specific_value'}).
1333: "',".$submission."),";
1334: $store_rows++;
1335: }
1336: }
1337: }
1338: }
1339: if ($store_rows) {
1340: chop($store_command);
1341: $dbh->do($store_command);
1342: if ($dbh->err) {
1343: $returnstatus = 'error storing response data';
1344: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
1345: &Apache::lonnet::logthis("While attempting\n".$store_command);
1346: }
1347: }
1348: ##
1349: ## Update the students "current" data in the performance
1350: ## and parameters tables.
1351: my ($status,undef) = &store_student_data
1352: ($sname,$sdom,$courseid,
1353: &Apache::lonnet::convert_dump_to_currentdump(\%studentdata));
1354: if ($returnstatus eq 'okay' && $status ne 'okay') {
1355: $returnstatus = 'error storing current data:'.$status;
1356: } elsif ($status ne 'okay') {
1357: $returnstatus .= ' error storing current data:'.$status;
1358: }
1359: ##
1360: ## Update the students time......
1361: if ($returnstatus eq 'okay') {
1362: &store_updatetime($student_id,$time_of_retrieval,$time_of_retrieval);
1363: if ($dbh->err) {
1364: if ($returnstatus eq 'okay') {
1365: $returnstatus = 'error updating student time';
1366: } else {
1367: $returnstatus = 'error updating student time';
1368: }
1369: }
1370: }
1371: return $returnstatus;
1372: }
1373:
1374: ################################################
1375: ################################################
1376:
1377: =pod
1378:
1379: =item &update_student_data()
1380:
1381: Input: $sname, $sdom, $courseid
1382:
1383: Output: $returnstatus, \%student_data
1384:
1385: $returnstatus is a string describing any errors that occured. 'okay' is the
1386: default.
1387: \%student_data is the data returned by a call to lonnet::currentdump.
1388:
1389: This subroutine loads a students data using lonnet::currentdump and inserts
1390: it into the MySQL database. The inserts are done on two tables,
1391: $performance_table and $parameters_table. $parameters_table holds the data
1392: that is not included in $performance_table. See the description of
1393: $performance_table elsewhere in this file. The INSERT calls are made
1394: directly by this subroutine, not through lonmysql because we do a 'bulk'
1395: insert which takes advantage of MySQLs non-SQL compliant INSERT command to
1396: insert multiple rows at a time. If anything has gone wrong during this
1397: process, $returnstatus is updated with a description of the error and
1398: \%student_data is returned.
1399:
1400: Notice we do not insert the data and immediately query it. This means it
1401: is possible for there to be data returned this first time that is not
1402: available the second time. CYA.
1403:
1404: =cut
1405:
1406: ################################################
1407: ################################################
1408: sub update_student_data {
1409: my ($sname,$sdom,$courseid) = @_;
1410: #
1411: # Set up database names
1412: &setup_table_names($courseid);
1413: #
1414: my $student_id = &get_student_id($sname,$sdom);
1415: my $student = $sname.':'.$sdom;
1416: #
1417: my $returnstatus = 'okay';
1418: #
1419: # Download students data
1420: my $time_of_retrieval = time;
1421: my @tmp = &Apache::lonnet::currentdump($courseid,$sdom,$sname);
1422: if ((scalar(@tmp) > 0) && ($tmp[0] =~ /^error:/)) {
1423: &Apache::lonnet::logthis('error getting data for '.
1424: $sname.':'.$sdom.' in course '.$courseid.
1425: ':'.$tmp[0]);
1426: $returnstatus = 'error getting data';
1427: return ($returnstatus,undef);
1428: }
1429: if (scalar(@tmp) < 1) {
1430: return ('no data',undef);
1431: }
1432: my %student_data = @tmp;
1433: my @Results = &store_student_data($sname,$sdom,$courseid,\%student_data);
1434: #
1435: # Set the students update time
1436: if ($Results[0] eq 'okay') {
1437: &store_updatetime($student_id,$time_of_retrieval,$time_of_retrieval);
1438: }
1439: #
1440: return @Results;
1441: }
1442:
1443: sub store_updatetime {
1444: my ($student_id,$updatetime,$fullupdatetime)=@_;
1445: my $values = '';
1446: if (defined($updatetime)) {
1447: $values = 'updatetime='.$updatetime.' ';
1448: }
1449: if (defined($fullupdatetime)) {
1450: if ($values ne '') {
1451: $values .= ',';
1452: }
1453: $values .= 'fullupdatetime='.$fullupdatetime.' ';
1454: }
1455: return if ($values eq '');
1456: my $dbh = &Apache::lonmysql::get_dbh();
1457: my $request = 'UPDATE '.$student_table.' SET '.$values.
1458: ' WHERE student_id='.$student_id.' LIMIT 1';
1459: $dbh->do($request);
1460: }
1461:
1462: sub store_student_data {
1463: my ($sname,$sdom,$courseid,$student_data) = @_;
1464: #
1465: my $student_id = &get_student_id($sname,$sdom);
1466: my $student = $sname.':'.$sdom;
1467: #
1468: my $returnstatus = 'okay';
1469: #
1470: # Remove all of the students data from the table
1471: my $dbh = &Apache::lonmysql::get_dbh();
1472: $dbh->do('DELETE FROM '.$performance_table.' WHERE student_id='.
1473: $student_id);
1474: $dbh->do('DELETE FROM '.$parameters_table.' WHERE student_id='.
1475: $student_id);
1476: #
1477: # Store away the data
1478: #
1479: my $starttime = Time::HiRes::time;
1480: my $elapsed = 0;
1481: my $rows_stored;
1482: my $store_parameters_command = 'INSERT IGNORE INTO '.$parameters_table.
1483: ' VALUES '."\n";
1484: my $num_parameters = 0;
1485: my $store_performance_command = 'INSERT IGNORE INTO '.$performance_table.
1486: ' VALUES '."\n";
1487: return ('error',undef) if (! defined($dbh));
1488: while (my ($current_symb,$param_hash) = each(%{$student_data})) {
1489: #
1490: # make sure the symb is set up properly
1491: my $symb_id = &get_symb_id($current_symb);
1492: #
1493: # Load data into the tables
1494: while (my ($parameter,$value) = each(%$param_hash)) {
1495: my $newstring;
1496: if ($parameter !~ /(timestamp|resource\.(.*)\.(solved|tries|awarded|award|awarddetail|previous))/) {
1497: $newstring = "('".join("','",
1498: $symb_id,$student_id,
1499: $parameter)."',".
1500: $dbh->quote($value)."),\n";
1501: $num_parameters ++;
1502: if ($newstring !~ /''/) {
1503: $store_parameters_command .= $newstring;
1504: $rows_stored++;
1505: }
1506: }
1507: next if ($parameter !~ /^resource\.(.*)\.solved$/);
1508: #
1509: my $part = $1;
1510: my $part_id = &get_part_id($part);
1511: next if (!defined($part_id));
1512: my $solved = $value;
1513: my $tries = $param_hash->{'resource.'.$part.'.tries'};
1514: my $awarded = $param_hash->{'resource.'.$part.'.awarded'};
1515: my $award = $param_hash->{'resource.'.$part.'.award'};
1516: my $awarddetail = $param_hash->{'resource.'.$part.'.awarddetail'};
1517: my $timestamp = $param_hash->{'timestamp'};
1518: #
1519: $solved = '' if (! defined($solved));
1520: $tries = '' if (! defined($tries));
1521: $awarded = '' if (! defined($awarded));
1522: $award = '' if (! defined($award));
1523: $awarddetail = '' if (! defined($awarddetail));
1524: $newstring = "('".join("','",$symb_id,$student_id,$part_id,$part,
1525: $solved,$tries,$awarded,$award,
1526: $awarddetail,$timestamp)."'),\n";
1527: $store_performance_command .= $newstring;
1528: $rows_stored++;
1529: }
1530: }
1531: chop $store_parameters_command;
1532: chop $store_parameters_command;
1533: chop $store_performance_command;
1534: chop $store_performance_command;
1535: my $start = Time::HiRes::time;
1536: $dbh->do($store_performance_command);
1537: if ($dbh->err()) {
1538: &Apache::lonnet::logthis(' bigass insert error:'.$dbh->errstr());
1539: &Apache::lonnet::logthis('command = '.$store_performance_command);
1540: $returnstatus = 'error: unable to insert performance into database';
1541: return ($returnstatus,$student_data);
1542: }
1543: $dbh->do($store_parameters_command) if ($num_parameters>0);
1544: if ($dbh->err()) {
1545: &Apache::lonnet::logthis(' bigass insert error:'.$dbh->errstr());
1546: &Apache::lonnet::logthis('command = '.$store_parameters_command);
1547: &Apache::lonnet::logthis('rows_stored = '.$rows_stored);
1548: &Apache::lonnet::logthis('student_id = '.$student_id);
1549: $returnstatus = 'error: unable to insert parameters into database';
1550: return ($returnstatus,$student_data);
1551: }
1552: $elapsed += Time::HiRes::time - $start;
1553: return ($returnstatus,$student_data);
1554: }
1555:
1556: ######################################
1557: ######################################
1558:
1559: =pod
1560:
1561: =item &ensure_tables_are_set_up($courseid)
1562:
1563: Checks to be sure the MySQL tables for the given class are set up.
1564: If $courseid is omitted it will be obtained from the environment.
1565:
1566: Returns nothing on success and 'error' on failure
1567:
1568: =cut
1569:
1570: ######################################
1571: ######################################
1572: sub ensure_tables_are_set_up {
1573: my ($courseid) = @_;
1574: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1575: #
1576: # Clean out package variables
1577: &setup_table_names($courseid);
1578: #
1579: # if the tables do not exist, make them
1580: my @CurrentTable = &Apache::lonmysql::tables_in_db();
1581: my ($found_symb,$found_student,$found_part,
1582: $found_performance,$found_parameters,$found_fulldump_part,
1583: $found_fulldump_response,$found_fulldump_timestamp,
1584: $found_weight);
1585: foreach (@CurrentTable) {
1586: $found_symb = 1 if ($_ eq $symb_table);
1587: $found_student = 1 if ($_ eq $student_table);
1588: $found_part = 1 if ($_ eq $part_table);
1589: $found_performance = 1 if ($_ eq $performance_table);
1590: $found_parameters = 1 if ($_ eq $parameters_table);
1591: $found_fulldump_part = 1 if ($_ eq $fulldump_part_table);
1592: $found_fulldump_response = 1 if ($_ eq $fulldump_response_table);
1593: $found_fulldump_timestamp = 1 if ($_ eq $fulldump_timestamp_table);
1594: $found_weight = 1 if ($_ eq $weight_table);
1595: }
1596: if (!$found_symb ||
1597: !$found_student || !$found_part ||
1598: !$found_performance || !$found_parameters ||
1599: !$found_fulldump_part || !$found_fulldump_response ||
1600: !$found_fulldump_timestamp || !$found_weight ) {
1601: if (&init_dbs($courseid,1)) {
1602: return 'error';
1603: }
1604: }
1605: }
1606:
1607: ################################################
1608: ################################################
1609:
1610: =pod
1611:
1612: =item &ensure_current_data()
1613:
1614: Input: $sname, $sdom, $courseid
1615:
1616: Output: $status, $data
1617:
1618: This routine ensures the data for a given student is up to date.
1619: The $student_table is queried to determine the time of the last update.
1620: If the students data is out of date, &update_student_data() is called.
1621: The return values from the call to &update_student_data() are returned.
1622:
1623: =cut
1624:
1625: ################################################
1626: ################################################
1627: sub ensure_current_data {
1628: my ($sname,$sdom,$courseid) = @_;
1629: my $status = 'okay'; # return value
1630: #
1631: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1632: &ensure_tables_are_set_up($courseid);
1633: #
1634: # Get the update time for the user
1635: my $updatetime = 0;
1636: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1637: ($sdom,$sname,$courseid.'.db',
1638: $Apache::lonnet::perlvar{'lonUsersDir'});
1639: #
1640: my $student_id = &get_student_id($sname,$sdom);
1641: my @Result = &Apache::lonmysql::get_rows($student_table,
1642: "student_id ='$student_id'");
1643: my $data = undef;
1644: if (@Result) {
1645: $updatetime = $Result[0]->[5]; # Ack! This is dumb!
1646: }
1647: if ($modifiedtime > $updatetime) {
1648: ($status,$data) = &update_student_data($sname,$sdom,$courseid);
1649: }
1650: return ($status,$data);
1651: }
1652:
1653: ################################################
1654: ################################################
1655:
1656: =pod
1657:
1658: =item &ensure_current_full_data($sname,$sdom,$courseid)
1659:
1660: Input: $sname, $sdom, $courseid
1661:
1662: Output: $status
1663:
1664: This routine ensures the fulldata (the data from a lonnet::dump, not a
1665: lonnet::currentdump) for a given student is up to date.
1666: The $student_table is queried to determine the time of the last update.
1667: If the students fulldata is out of date, &update_full_student_data() is
1668: called.
1669:
1670: The return value from the call to &update_full_student_data() is returned.
1671:
1672: =cut
1673:
1674: ################################################
1675: ################################################
1676: sub ensure_current_full_data {
1677: my ($sname,$sdom,$courseid) = @_;
1678: my $status = 'okay'; # return value
1679: #
1680: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1681: &ensure_tables_are_set_up($courseid);
1682: #
1683: # Get the update time for the user
1684: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1685: ($sdom,$sname,$courseid.'.db',
1686: $Apache::lonnet::perlvar{'lonUsersDir'});
1687: #
1688: my $student_id = &get_student_id($sname,$sdom);
1689: my @Result = &Apache::lonmysql::get_rows($student_table,
1690: "student_id ='$student_id'");
1691: my $updatetime;
1692: if (@Result && ref($Result[0]) eq 'ARRAY') {
1693: $updatetime = $Result[0]->[6];
1694: }
1695: if (! defined($updatetime) || $modifiedtime > $updatetime) {
1696: $status = &update_full_student_data($sname,$sdom,$courseid);
1697: }
1698: return $status;
1699: }
1700:
1701: ################################################
1702: ################################################
1703:
1704: =pod
1705:
1706: =item &get_student_data_from_performance_cache()
1707:
1708: Input: $sname, $sdom, $symb, $courseid
1709:
1710: Output: hash reference containing the data for the given student.
1711: If $symb is undef, all the students data is returned.
1712:
1713: This routine is the heart of the local caching system. See the description
1714: of $performance_table, $symb_table, $student_table, and $part_table. The
1715: main task is building the MySQL request. The tables appear in the request
1716: in the order in which they should be parsed by MySQL. When searching
1717: on a student the $student_table is used to locate the 'student_id'. All
1718: rows in $performance_table which have a matching 'student_id' are returned,
1719: with data from $part_table and $symb_table which match the entries in
1720: $performance_table, 'part_id' and 'symb_id'. When searching on a symb,
1721: the $symb_table is processed first, with matching rows grabbed from
1722: $performance_table and filled in from $part_table and $student_table in
1723: that order.
1724:
1725: Running 'EXPLAIN ' on the 'SELECT' statements generated can be quite
1726: interesting, especially if you play with the order the tables are listed.
1727:
1728: =cut
1729:
1730: ################################################
1731: ################################################
1732: sub get_student_data_from_performance_cache {
1733: my ($sname,$sdom,$symb,$courseid)=@_;
1734: my $student = $sname.':'.$sdom if (defined($sname) && defined($sdom));
1735: &setup_table_names($courseid);
1736: #
1737: # Return hash
1738: my $studentdata;
1739: #
1740: my $dbh = &Apache::lonmysql::get_dbh();
1741: my $request = "SELECT ".
1742: "d.symb,a.part,a.solved,a.tries,a.awarded,a.award,a.awarddetail,".
1743: "a.timestamp ";
1744: if (defined($student)) {
1745: $request .= "FROM $student_table AS b ".
1746: "LEFT JOIN $performance_table AS a ON b.student_id=a.student_id ".
1747: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1748: "LEFT JOIN $symb_table AS d ON d.symb_id = a.symb_id ".
1749: "WHERE student='$student'";
1750: if (defined($symb) && $symb ne '') {
1751: $request .= " AND d.symb=".$dbh->quote($symb);
1752: }
1753: } elsif (defined($symb) && $symb ne '') {
1754: $request .= "FROM $symb_table as d ".
1755: "LEFT JOIN $performance_table AS a ON d.symb_id=a.symb_id ".
1756: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1757: "LEFT JOIN $student_table AS b ON b.student_id = a.student_id ".
1758: "WHERE symb='".$dbh->quote($symb)."'";
1759: }
1760: my $starttime = Time::HiRes::time;
1761: my $rows_retrieved = 0;
1762: my $sth = $dbh->prepare($request);
1763: $sth->execute();
1764: if ($sth->err()) {
1765: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1766: &Apache::lonnet::logthis("\n".$request."\n");
1767: &Apache::lonnet::logthis("error is:".$sth->errstr());
1768: return undef;
1769: }
1770: foreach my $row (@{$sth->fetchall_arrayref}) {
1771: $rows_retrieved++;
1772: my ($symb,$part,$solved,$tries,$awarded,$award,$awarddetail,$time) =
1773: (@$row);
1774: my $base = 'resource.'.$part;
1775: $studentdata->{$symb}->{$base.'.solved'} = $solved;
1776: $studentdata->{$symb}->{$base.'.tries'} = $tries;
1777: $studentdata->{$symb}->{$base.'.awarded'} = $awarded;
1778: $studentdata->{$symb}->{$base.'.award'} = $award;
1779: $studentdata->{$symb}->{$base.'.awarddetail'} = $awarddetail;
1780: $studentdata->{$symb}->{'timestamp'} = $time if (defined($time) && $time ne '');
1781: }
1782: ## Get misc parameters
1783: $request = 'SELECT c.symb,a.parameter,a.value '.
1784: "FROM $student_table AS b ".
1785: "LEFT JOIN $parameters_table AS a ON b.student_id=a.student_id ".
1786: "LEFT JOIN $symb_table AS c ON c.symb_id = a.symb_id ".
1787: "WHERE student='$student'";
1788: if (defined($symb) && $symb ne '') {
1789: $request .= " AND c.symb=".$dbh->quote($symb);
1790: }
1791: $sth = $dbh->prepare($request);
1792: $sth->execute();
1793: if ($sth->err()) {
1794: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1795: &Apache::lonnet::logthis("\n".$request."\n");
1796: &Apache::lonnet::logthis("error is:".$sth->errstr());
1797: if (defined($symb) && $symb ne '') {
1798: $studentdata = $studentdata->{$symb};
1799: }
1800: return $studentdata;
1801: }
1802: #
1803: foreach my $row (@{$sth->fetchall_arrayref}) {
1804: $rows_retrieved++;
1805: my ($symb,$parameter,$value) = (@$row);
1806: $studentdata->{$symb}->{$parameter} = $value;
1807: }
1808: #
1809: if (defined($symb) && $symb ne '') {
1810: $studentdata = $studentdata->{$symb};
1811: }
1812: return $studentdata;
1813: }
1814:
1815: ################################################
1816: ################################################
1817:
1818: =pod
1819:
1820: =item &get_current_state()
1821:
1822: Input: $sname,$sdom,$symb,$courseid
1823:
1824: Output: Described below
1825:
1826: Retrieve the current status of a students performance. $sname and
1827: $sdom are the only required parameters. If $symb is undef the results
1828: of an &Apache::lonnet::currentdump() will be returned.
1829: If $courseid is undef it will be retrieved from the environment.
1830:
1831: The return structure is based on &Apache::lonnet::currentdump. If
1832: $symb is unspecified, all the students data is returned in a hash of
1833: the form:
1834: (
1835: symb1 => { param1 => value1, param2 => value2 ... },
1836: symb2 => { param1 => value1, param2 => value2 ... },
1837: )
1838:
1839: If $symb is specified, a hash of
1840: (
1841: param1 => value1,
1842: param2 => value2,
1843: )
1844: is returned.
1845:
1846: If no data is found for $symb, or if the student has no performance data,
1847: an empty list is returned.
1848:
1849: =cut
1850:
1851: ################################################
1852: ################################################
1853: sub get_current_state {
1854: my ($sname,$sdom,$symb,$courseid,$forcedownload)=@_;
1855: #
1856: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1857: #
1858: return () if (! defined($sname) || ! defined($sdom));
1859: #
1860: my ($status,$data) = &ensure_current_data($sname,$sdom,$courseid);
1861: # &Apache::lonnet::logthis
1862: # ('sname = '.$sname.
1863: # ' domain = '.$sdom.
1864: # ' status = '.$status.
1865: # ' data is '.(defined($data)?'defined':'undefined'));
1866: # while (my ($symb,$hash) = each(%$data)) {
1867: # &Apache::lonnet::logthis($symb."\n----------------------------------");
1868: # while (my ($key,$value) = each (%$hash)) {
1869: # &Apache::lonnet::logthis(" ".$key." = ".$value);
1870: # }
1871: # }
1872: #
1873: if (defined($data) && defined($symb) && ref($data->{$symb})) {
1874: return %{$data->{$symb}};
1875: } elsif (defined($data) && ! defined($symb) && ref($data)) {
1876: return %$data;
1877: }
1878: if ($status eq 'no data') {
1879: return ();
1880: } else {
1881: if ($status ne 'okay' && $status ne '') {
1882: &Apache::lonnet::logthis('status = '.$status);
1883: return ();
1884: }
1885: my $returnhash = &get_student_data_from_performance_cache($sname,$sdom,
1886: $symb,$courseid);
1887: return %$returnhash if (defined($returnhash));
1888: }
1889: return ();
1890: }
1891:
1892: ################################################
1893: ################################################
1894:
1895: =pod
1896:
1897: =item &get_problem_statistics()
1898:
1899: Gather data on a given problem. The database is assumed to be
1900: populated and all local caching variables are assumed to be set
1901: properly. This means you need to call &ensure_current_data for
1902: the students you are concerned with prior to calling this routine.
1903:
1904: Inputs: $Sections, $status, $symb, $part, $courseid, $starttime, $endtime
1905:
1906: =over 4
1907:
1908: =item $Sections Array ref containing section names for students.
1909: 'all' is allowed to be the first (and only) item in the array.
1910:
1911: =item $status String describing the status of students
1912:
1913: =item $symb is the symb for the problem.
1914:
1915: =item $part is the part id you need statistics for
1916:
1917: =item $courseid is the course id, of course!
1918:
1919: =item $starttime and $endtime are unix times which to use to limit
1920: the statistical data.
1921:
1922: =back
1923:
1924: Outputs: See the code for up to date information. A hash reference is
1925: returned. The hash has the following keys defined:
1926:
1927: =over 4
1928:
1929: =item num_students The number of students attempting the problem
1930:
1931: =item tries The total number of tries for the students
1932:
1933: =item max_tries The maximum number of tries taken
1934:
1935: =item mean_tries The average number of tries
1936:
1937: =item num_solved The number of students able to solve the problem
1938:
1939: =item num_override The number of students whose answer is 'correct_by_override'
1940:
1941: =item deg_of_diff The degree of difficulty of the problem
1942:
1943: =item std_tries The standard deviation of the number of tries
1944:
1945: =item skew_tries The skew of the number of tries
1946:
1947: =item per_wrong The number of students attempting the problem who were not
1948: able to answer it correctly.
1949:
1950: =back
1951:
1952: =cut
1953:
1954: ################################################
1955: ################################################
1956: sub get_problem_statistics {
1957: my ($Sections,$status,$symb,$part,$courseid,$starttime,$endtime) = @_;
1958: return if (! defined($symb) || ! defined($part));
1959: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1960: #
1961: &setup_table_names($courseid);
1962: my $symb_id = &get_symb_id($symb);
1963: my $part_id = &get_part_id($part);
1964: my $stats_table = $courseid.'_problem_stats';
1965: #
1966: my $dbh = &Apache::lonmysql::get_dbh();
1967: return undef if (! defined($dbh));
1968: #
1969: # Clean out the table
1970: $dbh->do('DROP TABLE '.$stats_table); # May return an error
1971: my $request =
1972: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
1973: 'SELECT a.student_id,a.solved,a.award,a.awarded,a.tries '.
1974: 'FROM '.$performance_table.' AS a ';
1975: #
1976: # See if we need to include some requirements on the students
1977: if ((defined($Sections) && lc($Sections->[0]) ne 'all') ||
1978: (defined($status) && lc($status) ne 'any')) {
1979: $request .= 'NATURAL LEFT JOIN '.$student_table.' AS b ';
1980: }
1981: $request .= ' WHERE a.symb_id='.$symb_id.' AND a.part_id='.$part_id;
1982: #
1983: # Limit the students included to those specified
1984: if (defined($Sections) && lc($Sections->[0]) ne 'all') {
1985: $request .= ' AND ('.
1986: join(' OR ', map { "b.section='".$_."'" } @$Sections
1987: ).')';
1988: }
1989: if (defined($status) && lc($status) ne 'any') {
1990: $request .= " AND b.status='".$status."'";
1991: }
1992: #
1993: # Limit by starttime and endtime
1994: my $time_requirements = undef;
1995: if (defined($starttime)) {
1996: $time_requirements .= 'a.timestamp>='.$starttime;
1997: if (defined($endtime)) {
1998: $time_requirements .= ' AND a.timestamp<='.$endtime;
1999: }
2000: } elsif (defined($endtime)) {
2001: $time_requirements .= 'a.timestamp<='.$endtime;
2002: }
2003: if (defined($time_requirements)) {
2004: $request .= ' AND '.$time_requirements;
2005: }
2006: #
2007: # Finally, execute the request to create the temporary table
2008: $dbh->do($request);
2009: #
2010: # Collect the first suite of statistics
2011: $request = 'SELECT COUNT(*),SUM(tries),'.
2012: 'AVG(tries),STD(tries) '.
2013: 'FROM '.$stats_table;
2014: my ($num,$tries,$mean,$STD) = &execute_SQL_request
2015: ($dbh,$request);
2016: #
2017: $request = 'SELECT MAX(tries),MIN(tries) FROM '.$stats_table.
2018: ' WHERE awarded>0';
2019: if (defined($time_requirements)) {
2020: $request .= ' AND '.$time_requirements;
2021: }
2022: my ($max,$min) = &execute_SQL_request($dbh,$request);
2023: #
2024: $request = 'SELECT SUM(awarded) FROM '.$stats_table;
2025: if (defined($time_requirements)) {
2026: $request .= ' AND '.$time_requirements;
2027: }
2028: my ($Solved) = &execute_SQL_request($dbh,$request);
2029: #
2030: $request = 'SELECT SUM(awarded) FROM '.$stats_table.
2031: " WHERE solved='correct_by_override'";
2032: if (defined($time_requirements)) {
2033: $request .= ' AND '.$time_requirements;
2034: }
2035: my ($solved) = &execute_SQL_request($dbh,$request);
2036: #
2037: $Solved -= $solved;
2038: #
2039: $num = 0 if (! defined($num));
2040: $tries = 0 if (! defined($tries));
2041: $max = 0 if (! defined($max));
2042: $min = 0 if (! defined($min));
2043: $STD = 0 if (! defined($STD));
2044: $Solved = 0 if (! defined($Solved) || $Solved < 0);
2045: $solved = 0 if (! defined($solved));
2046: #
2047: # Compute the more complicated statistics
2048: my $DegOfDiff = 'nan';
2049: $DegOfDiff = 1-($Solved)/$tries if ($tries>0);
2050: #
2051: my $SKEW = 'nan';
2052: my $wrongpercent = 0;
2053: my $numwrong = 'nan';
2054: if ($num > 0) {
2055: ($SKEW) = &execute_SQL_request($dbh,'SELECT SQRT(SUM('.
2056: 'POWER(tries - '.$STD.',3)'.
2057: '))/'.$num.' FROM '.$stats_table);
2058: $numwrong = $num-$Solved;
2059: $wrongpercent=int(10*100*$numwrong/$num)/10;
2060: }
2061: #
2062: # Drop the temporary table
2063: $dbh->do('DROP TABLE '.$stats_table); # May return an error
2064: #
2065: # Return result
2066: return { num_students => $num,
2067: tries => $tries,
2068: max_tries => $max,
2069: min_tries => $min,
2070: mean_tries => $mean,
2071: std_tries => $STD,
2072: skew_tries => $SKEW,
2073: num_solved => $Solved,
2074: num_override => $solved,
2075: num_wrong => $numwrong,
2076: per_wrong => $wrongpercent,
2077: deg_of_diff => $DegOfDiff };
2078: }
2079:
2080: ##
2081: ## This is a helper for get_statistics
2082: sub execute_SQL_request {
2083: my ($dbh,$request)=@_;
2084: # &Apache::lonnet::logthis($request);
2085: my $sth = $dbh->prepare($request);
2086: $sth->execute();
2087: my $row = $sth->fetchrow_arrayref();
2088: if (ref($row) eq 'ARRAY' && scalar(@$row)>0) {
2089: return @$row;
2090: }
2091: return ();
2092: }
2093:
2094: ######################################################
2095: ######################################################
2096:
2097: =pod
2098:
2099: =item &populate_weight_table
2100:
2101: =cut
2102:
2103: ######################################################
2104: ######################################################
2105: sub populate_weight_table {
2106: my ($courseid) = @_;
2107: if (! defined($courseid)) {
2108: $courseid = $ENV{'request.course.id'};
2109: }
2110: #
2111: &setup_table_names($courseid);
2112: my ($top,$sequences,$assessments) = get_sequence_assessment_data();
2113: if (! defined($top) || ! ref($top)) {
2114: # There has been an error, better report it
2115: &Apache::lonnet::logthis('top is undefined');
2116: return;
2117: }
2118: # Since we use lonnet::EXT to retrieve problem weights,
2119: # to ensure current data we must clear the caches out.
2120: &Apache::lonnet::clear_EXT_cache_status();
2121: my $dbh = &Apache::lonmysql::get_dbh();
2122: my $request = 'INSERT IGNORE INTO '.$weight_table.
2123: "(symb_id,part_id,weight) VALUES ";
2124: my $weight;
2125: foreach my $res (@$assessments) {
2126: my $symb_id = &get_symb_id($res->{'symb'});
2127: foreach my $part (@{$res->{'parts'}}) {
2128: my $part_id = &get_part_id($part);
2129: $weight = &Apache::lonnet::EXT('resource.'.$part.'.weight',
2130: $res->{'symb'},
2131: undef,undef,undef);
2132: if (!defined($weight) || ($weight eq '')) {
2133: $weight=1;
2134: }
2135: $request .= "('".$symb_id."','".$part_id."','".$weight."'),";
2136: }
2137: }
2138: $request =~ s/(,)$//;
2139: # &Apache::lonnet::logthis('request = '.$/.$request);
2140: $dbh->do($request);
2141: if ($dbh->err()) {
2142: &Apache::lonnet::logthis("error ".$dbh->errstr().
2143: " occured executing \n".
2144: $request);
2145: }
2146: return;
2147: }
2148:
2149: ##########################################################
2150: ##########################################################
2151:
2152: =pod
2153:
2154: =item &limit_by_start_end_times
2155:
2156: Build SQL WHERE condition which limits the data collected by the start
2157: and end times provided
2158:
2159: Inputs: $starttime, $endtime, $table
2160:
2161: Returns: $time_limits
2162:
2163: =cut
2164:
2165: ##########################################################
2166: ##########################################################
2167: sub limit_by_start_end_time {
2168: my ($starttime,$endtime,$table) = @_;
2169: my $time_requirements = undef;
2170: if (defined($starttime)) {
2171: $time_requirements .= $table.".timestamp>='".$starttime."'";
2172: if (defined($endtime)) {
2173: $time_requirements .= " AND ".$table.".timestamp<='".$endtime."'";
2174: }
2175: } elsif (defined($endtime)) {
2176: $time_requirements .= $table.".timestamp<='".$endtime."'";
2177: }
2178: return $time_requirements;
2179: }
2180:
2181: ##########################################################
2182: ##########################################################
2183:
2184: =pod
2185:
2186: =item &limit_by_section_and_status
2187:
2188: Build SQL WHERE condition which limits the data collected by section and
2189: student status.
2190:
2191: Inputs: $Sections (array ref)
2192: $enrollment (string: 'any', 'expired', 'active')
2193: $tablename The name of the table that holds the student data
2194:
2195: Returns: $student_requirements,$enrollment_requirements
2196:
2197: =cut
2198:
2199: ##########################################################
2200: ##########################################################
2201: sub limit_by_section_and_status {
2202: my ($Sections,$enrollment,$tablename) = @_;
2203: my $student_requirements = undef;
2204: if ( (defined($Sections) && $Sections->[0] ne 'all')) {
2205: $student_requirements = '('.
2206: join(' OR ', map { $tablename.".section='".$_."'" } @$Sections
2207: ).')';
2208: }
2209: #
2210: my $enrollment_requirements=undef;
2211: if (defined($enrollment) && $enrollment ne 'Any') {
2212: $enrollment_requirements = $tablename.".status='".$enrollment."'";
2213: }
2214: return ($student_requirements,$enrollment_requirements);
2215: }
2216:
2217: ######################################################
2218: ######################################################
2219:
2220: =pod
2221:
2222: =item rank_students_by_scores_on_resources
2223:
2224: Inputs:
2225: $resources: array ref of hash ref. Each hash ref needs key 'symb'.
2226: $Sections: array ref of sections to include,
2227: $enrollment: string,
2228: $courseid (may be omitted)
2229:
2230: Returns; An array of arrays. The sub arrays contain a student name and
2231: their score on the resources.
2232:
2233: =cut
2234:
2235: ######################################################
2236: ######################################################
2237: sub RNK_student { return 0; };
2238: sub RNK_score { return 1; };
2239:
2240: sub rank_students_by_scores_on_resources {
2241: my ($resources,$Sections,$enrollment,$courseid,$starttime,$endtime) = @_;
2242: return if (! defined($resources) || ! ref($resources) eq 'ARRAY');
2243: if (! defined($courseid)) {
2244: $courseid = $ENV{'request.course.id'};
2245: }
2246: #
2247: &setup_table_names($courseid);
2248: my $dbh = &Apache::lonmysql::get_dbh();
2249: my ($section_limits,$enrollment_limits)=
2250: &limit_by_section_and_status($Sections,$enrollment,'b');
2251: my $symb_limits = '('.join(' OR ',map {'a.symb_id='.&get_symb_id($_);
2252: } @$resources
2253: ).')';
2254: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
2255: my $request = 'SELECT b.student,SUM(a.awarded*w.weight) AS score FROM '.
2256: $performance_table.' AS a '.
2257: 'NATURAL LEFT JOIN '.$weight_table.' AS w '.
2258: 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.
2259: 'WHERE ';
2260: if (defined($section_limits)) {
2261: $request .= $section_limits.' AND ';
2262: }
2263: if (defined($enrollment_limits)) {
2264: $request .= $enrollment_limits.' AND ';
2265: }
2266: if (defined($time_limits)) {
2267: $request .= $time_limits.' AND ';
2268: }
2269: if ($symb_limits ne '()') {
2270: $request .= $symb_limits.' AND ';
2271: }
2272: $request =~ s/( AND )$//; # Remove extra conjunction
2273: $request =~ s/( WHERE )$//; # In case there were no limits placed on it
2274: $request .= ' GROUP BY a.student_id ORDER BY score';
2275: #&Apache::lonnet::logthis('request = '.$/.$request);
2276: my $sth = $dbh->prepare($request);
2277: $sth->execute();
2278: my $rows = $sth->fetchall_arrayref();
2279: return ($rows);
2280: }
2281:
2282: ########################################################
2283: ########################################################
2284:
2285: =pod
2286:
2287: =item &get_sum_of_scores
2288:
2289: Inputs: $resource (hash ref, needs {'symb'} key),
2290: $part, (the part id),
2291: $students (array ref, contents of array are scalars holding 'sname:sdom'),
2292: $courseid
2293:
2294: Returns: the sum of the score on the problem part over the students and the
2295: maximum possible value for the sum (taken from the weight table).
2296:
2297: =cut
2298:
2299: ########################################################
2300: ########################################################
2301: sub get_sum_of_scores {
2302: my ($resource,$part,$students,$courseid,$starttime,$endtime) = @_;
2303: if (! defined($courseid)) {
2304: $courseid = $ENV{'request.course.id'};
2305: }
2306: #
2307: &setup_table_names($courseid);
2308: my $dbh = &Apache::lonmysql::get_dbh();
2309: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
2310: my $request = 'SELECT SUM(a.awarded*w.weight),SUM(w.weight) FROM '.
2311: $performance_table.' AS a '.
2312: 'NATURAL LEFT JOIN '.$weight_table.' AS w ';
2313: $request .= 'WHERE a.symb_id='.&get_symb_id($resource->{'symb'}).
2314: ' AND a.part_id='.&get_part_id($part);
2315: if (defined($time_limits)) {
2316: $request .= ' AND '.$time_limits;
2317: }
2318: if (defined($students)) {
2319: $request .= ' AND ('.
2320: join(' OR ',map {'a.student_id='.&get_student_id(split(':',$_));
2321: } @$students).
2322: ')';
2323: }
2324: my $sth = $dbh->prepare($request);
2325: $sth->execute();
2326: my $rows = $sth->fetchrow_arrayref();
2327: if ($dbh->err) {
2328: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2329: return (undef,undef);
2330: }
2331: return ($rows->[0],$rows->[1]);
2332: }
2333:
2334: ########################################################
2335: ########################################################
2336:
2337: =pod
2338:
2339: =item &score_stats
2340:
2341: Inputs: $Sections, $enrollment, $symbs, $starttime,
2342: $endtime, $courseid
2343:
2344: $Sections, $enrollment, $starttime, $endtime, and $courseid are the same as
2345: elsewhere in this module.
2346: $symbs is an array ref of symbs
2347:
2348: Returns: minimum, maximum, mean, s.d., number of students, and maximum
2349: possible of student scores on the given resources
2350:
2351: =cut
2352:
2353: ########################################################
2354: ########################################################
2355: sub score_stats {
2356: my ($Sections,$enrollment,$symbs,$starttime,$endtime,$courseid)=@_;
2357: if (! defined($courseid)) {
2358: $courseid = $ENV{'request.course.id'};
2359: }
2360: #
2361: &setup_table_names($courseid);
2362: my $dbh = &Apache::lonmysql::get_dbh();
2363: #
2364: my ($section_limits,$enrollment_limits)=
2365: &limit_by_section_and_status($Sections,$enrollment,'b');
2366: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
2367: my @Symbids = map { &get_symb_id($_); } @{$symbs};
2368: #
2369: my $stats_table = $courseid.'_problem_stats';
2370: my $symb_restriction = join(' OR ',map {'a.symb_id='.$_;} @Symbids);
2371: my $request = 'DROP TABLE '.$stats_table;
2372: $dbh->do($request);
2373: $request =
2374: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
2375: 'SELECT a.student_id,'.
2376: 'SUM(a.awarded*w.weight) AS score FROM '.
2377: $performance_table.' AS a '.
2378: 'NATURAL LEFT JOIN '.$weight_table.' AS w '.
2379: 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.
2380: 'WHERE ('.$symb_restriction.')';
2381: if ($time_limits) {
2382: $request .= ' AND '.$time_limits;
2383: }
2384: if ($section_limits) {
2385: $request .= ' AND '.$section_limits;
2386: }
2387: if ($enrollment_limits) {
2388: $request .= ' AND '.$enrollment_limits;
2389: }
2390: $request .= ' GROUP BY a.student_id';
2391: # &Apache::lonnet::logthis('request = '.$/.$request);
2392: my $sth = $dbh->prepare($request);
2393: $sth->execute();
2394: $request =
2395: 'SELECT AVG(score),STD(score),MAX(score),MIN(score),COUNT(score) '.
2396: 'FROM '.$stats_table;
2397: my ($ave,$std,$max,$min,$count) = &execute_SQL_request($dbh,$request);
2398: # &Apache::lonnet::logthis('request = '.$/.$request);
2399:
2400: $request = 'SELECT SUM(weight) FROM '.$weight_table.
2401: ' WHERE ('.$symb_restriction.')';
2402: my ($max_possible) = &execute_SQL_request($dbh,$request);
2403: # &Apache::lonnet::logthis('request = '.$/.$request);
2404: return($min,$max,$ave,$std,$count,$max_possible);
2405: }
2406:
2407:
2408: ########################################################
2409: ########################################################
2410:
2411: =pod
2412:
2413: =item &count_stats
2414:
2415: Inputs: $Sections, $enrollment, $symbs, $starttime,
2416: $endtime, $courseid
2417:
2418: $Sections, $enrollment, $starttime, $endtime, and $courseid are the same as
2419: elsewhere in this module.
2420: $symbs is an array ref of symbs
2421:
2422: Returns: minimum, maximum, mean, s.d., and number of students
2423: of the number of items correct on the given resources
2424:
2425: =cut
2426:
2427: ########################################################
2428: ########################################################
2429: sub count_stats {
2430: my ($Sections,$enrollment,$symbs,$starttime,$endtime,$courseid)=@_;
2431: if (! defined($courseid)) {
2432: $courseid = $ENV{'request.course.id'};
2433: }
2434: #
2435: &setup_table_names($courseid);
2436: my $dbh = &Apache::lonmysql::get_dbh();
2437: #
2438: my ($section_limits,$enrollment_limits)=
2439: &limit_by_section_and_status($Sections,$enrollment,'b');
2440: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
2441: my @Symbids = map { &get_symb_id($_); } @{$symbs};
2442: #
2443: my $stats_table = $courseid.'_problem_stats';
2444: my $symb_restriction = join(' OR ',map {'a.symb_id='.$_;} @Symbids);
2445: my $request = 'DROP TABLE '.$stats_table;
2446: $dbh->do($request);
2447: $request =
2448: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
2449: 'SELECT a.student_id,'.
2450: 'COUNT(a.award) AS count FROM '.
2451: $performance_table.' AS a '.
2452: 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.
2453: 'WHERE ('.$symb_restriction.')'.
2454: " AND a.award!='INCORRECT_ATTEMPTED'";
2455: if ($time_limits) {
2456: $request .= ' AND '.$time_limits;
2457: }
2458: if ($section_limits) {
2459: $request .= ' AND '.$section_limits;
2460: }
2461: if ($enrollment_limits) {
2462: $request .= ' AND '.$enrollment_limits;
2463: }
2464: $request .= ' GROUP BY a.student_id';
2465: # &Apache::lonnet::logthis('request = '.$/.$request);
2466: my $sth = $dbh->prepare($request);
2467: $sth->execute();
2468: $request =
2469: 'SELECT AVG(count),STD(count),MAX(count),MIN(count),COUNT(count) '.
2470: 'FROM '.$stats_table;
2471: my ($ave,$std,$max,$min,$count) = &execute_SQL_request($dbh,$request);
2472: # &Apache::lonnet::logthis('request = '.$/.$request);
2473: return($min,$max,$ave,$std,$count);
2474: }
2475:
2476: ######################################################
2477: ######################################################
2478:
2479: =pod
2480:
2481: =item get_student_data
2482:
2483: =cut
2484:
2485: ######################################################
2486: ######################################################
2487: sub get_student_data {
2488: my ($students,$courseid) = @_;
2489: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2490: &setup_table_names($courseid);
2491: my $dbh = &Apache::lonmysql::get_dbh();
2492: return undef if (! defined($dbh));
2493: my $request = 'SELECT '.
2494: 'student_id, student '.
2495: 'FROM '.$student_table;
2496: if (defined($students)) {
2497: $request .= ' WHERE ('.
2498: join(' OR ', map {'student_id='.
2499: &get_student_id($_->{'username'},
2500: $_->{'domain'})
2501: } @$students
2502: ).')';
2503: }
2504: $request.= ' ORDER BY student_id';
2505: my $sth = $dbh->prepare($request);
2506: $sth->execute();
2507: if ($dbh->err) {
2508: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2509: return undef;
2510: }
2511: my $dataset = $sth->fetchall_arrayref();
2512: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2513: return $dataset;
2514: }
2515: }
2516:
2517: sub RD_student_id { return 0; }
2518: sub RD_awarddetail { return 1; }
2519: sub RD_response_eval { return 2; }
2520: sub RD_submission { return 3; }
2521: sub RD_timestamp { return 4; }
2522: sub RD_tries { return 5; }
2523: sub RD_sname { return 6; }
2524:
2525: sub get_response_data {
2526: my ($Sections,$enrollment,$symb,$response,$courseid) = @_;
2527: return undef if (! defined($symb) ||
2528: ! defined($response));
2529: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2530: #
2531: &setup_table_names($courseid);
2532: my $symb_id = &get_symb_id($symb);
2533: if (! defined($symb_id)) {
2534: &Apache::lonnet::logthis('Unable to find symb for '.$symb.' in '.$courseid);
2535: return undef;
2536: }
2537: my $response_id = &get_part_id($response);
2538: if (! defined($response_id)) {
2539: &Apache::lonnet::logthis('Unable to find id for '.$response.' in '.$courseid);
2540: return undef;
2541: }
2542: #
2543: my $dbh = &Apache::lonmysql::get_dbh();
2544: return undef if (! defined($dbh));
2545: #
2546: my ($student_requirements,$enrollment_requirements) =
2547: &limit_by_section_and_status($Sections,$enrollment,'d');
2548: my $request = 'SELECT '.
2549: 'a.student_id, a.awarddetail, a.response_specific_value, '.
2550: 'a.submission, b.timestamp, c.tries, d.student '.
2551: 'FROM '.$fulldump_response_table.' AS a '.
2552: 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2553: 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2554: 'a.transaction = b.transaction '.
2555: 'LEFT JOIN '.$fulldump_part_table.' AS c '.
2556: 'ON a.symb_id=c.symb_id AND a.student_id=c.student_id AND '.
2557: 'a.part_id=c.part_id AND a.transaction = c.transaction '.
2558: 'LEFT JOIN '.$student_table.' AS d '.
2559: 'ON a.student_id=d.student_id '.
2560: 'WHERE '.
2561: 'a.symb_id='.$symb_id.' AND a.response_id='.$response_id;
2562: if (defined($student_requirements) || defined($enrollment_requirements)) {
2563: $request .= ' AND ';
2564: if (defined($student_requirements)) {
2565: $request .= $student_requirements.' AND ';
2566: }
2567: if (defined($enrollment_requirements)) {
2568: $request .= $enrollment_requirements.' AND ';
2569: }
2570: $request =~ s/( AND )$//;
2571: }
2572: $request .= ' ORDER BY b.timestamp';
2573: # &Apache::lonnet::logthis("request =\n".$request);
2574: my $sth = $dbh->prepare($request);
2575: $sth->execute();
2576: if ($dbh->err) {
2577: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2578: return undef;
2579: }
2580: my $dataset = $sth->fetchall_arrayref();
2581: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2582: # Clear the \'s from around the submission
2583: for (my $i =0;$i<scalar(@$dataset);$i++) {
2584: $dataset->[$i]->[3] =~ s/(\'$|^\')//g;
2585: }
2586: return $dataset;
2587: }
2588: }
2589:
2590:
2591: sub RDs_awarddetail { return 3; }
2592: sub RDs_submission { return 2; }
2593: sub RDs_timestamp { return 1; }
2594: sub RDs_tries { return 0; }
2595: sub RDs_awarded { return 4; }
2596:
2597: sub get_response_data_by_student {
2598: my ($student,$symb,$response,$courseid) = @_;
2599: return undef if (! defined($symb) ||
2600: ! defined($response));
2601: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2602: #
2603: &setup_table_names($courseid);
2604: my $symb_id = &get_symb_id($symb);
2605: my $response_id = &get_part_id($response);
2606: #
2607: my $student_id = &get_student_id($student->{'username'},
2608: $student->{'domain'});
2609: #
2610: my $dbh = &Apache::lonmysql::get_dbh();
2611: return undef if (! defined($dbh));
2612: my $request = 'SELECT '.
2613: 'c.tries, b.timestamp, a.submission, a.awarddetail, e.awarded '.
2614: 'FROM '.$fulldump_response_table.' AS a '.
2615: 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2616: 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2617: 'a.transaction = b.transaction '.
2618: 'LEFT JOIN '.$fulldump_part_table.' AS c '.
2619: 'ON a.symb_id=c.symb_id AND a.student_id=c.student_id AND '.
2620: 'a.part_id=c.part_id AND a.transaction = c.transaction '.
2621: 'LEFT JOIN '.$student_table.' AS d '.
2622: 'ON a.student_id=d.student_id '.
2623: 'LEFT JOIN '.$performance_table.' AS e '.
2624: 'ON a.symb_id=e.symb_id AND a.part_id=e.part_id AND '.
2625: 'a.student_id=e.student_id AND c.tries=e.tries '.
2626: 'WHERE '.
2627: 'a.symb_id='.$symb_id.' AND a.response_id='.$response_id.
2628: ' AND a.student_id='.$student_id.' ORDER BY b.timestamp';
2629: # &Apache::lonnet::logthis("request =\n".$request);
2630: my $sth = $dbh->prepare($request);
2631: $sth->execute();
2632: if ($dbh->err) {
2633: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2634: return undef;
2635: }
2636: my $dataset = $sth->fetchall_arrayref();
2637: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2638: # Clear the \'s from around the submission
2639: for (my $i =0;$i<scalar(@$dataset);$i++) {
2640: $dataset->[$i]->[2] =~ s/(\'$|^\')//g;
2641: }
2642: return $dataset;
2643: }
2644: return undef; # error occurred
2645: }
2646:
2647: sub RT_student_id { return 0; }
2648: sub RT_awarded { return 1; }
2649: sub RT_tries { return 2; }
2650: sub RT_timestamp { return 3; }
2651:
2652: sub get_response_time_data {
2653: my ($students,$symb,$part,$courseid) = @_;
2654: return undef if (! defined($symb) ||
2655: ! defined($part));
2656: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2657: #
2658: &setup_table_names($courseid);
2659: my $symb_id = &get_symb_id($symb);
2660: my $part_id = &get_part_id($part);
2661: #
2662: my $dbh = &Apache::lonmysql::get_dbh();
2663: return undef if (! defined($dbh));
2664: my $request = 'SELECT '.
2665: 'a.student_id, a.awarded, a.tries, b.timestamp '.
2666: 'FROM '.$fulldump_part_table.' AS a '.
2667: 'NATURAL LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2668: # 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2669: # 'a.transaction = b.transaction '.
2670: 'WHERE '.
2671: 'a.symb_id='.$symb_id.' AND a.part_id='.$part_id;
2672: if (defined($students)) {
2673: $request .= ' AND ('.
2674: join(' OR ', map {'a.student_id='.
2675: &get_student_id($_->{'username'},
2676: $_->{'domain'})
2677: } @$students
2678: ).')';
2679: }
2680: $request .= ' ORDER BY b.timestamp';
2681: # &Apache::lonnet::logthis("request =\n".$request);
2682: my $sth = $dbh->prepare($request);
2683: $sth->execute();
2684: if ($dbh->err) {
2685: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2686: return undef;
2687: }
2688: my $dataset = $sth->fetchall_arrayref();
2689: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2690: return $dataset;
2691: }
2692:
2693: }
2694:
2695: ################################################
2696: ################################################
2697:
2698: =pod
2699:
2700: =item &get_student_scores($Sections,$Symbs,$enrollment,$courseid)
2701:
2702: =cut
2703:
2704: ################################################
2705: ################################################
2706: sub get_student_scores {
2707: my ($Sections,$Symbs,$enrollment,$courseid,$starttime,$endtime) = @_;
2708: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2709: &setup_table_names($courseid);
2710: my $dbh = &Apache::lonmysql::get_dbh();
2711: return (undef) if (! defined($dbh));
2712: my $tmptable = $courseid.'_temp_'.time;
2713: #
2714: my $symb_requirements;
2715: if (defined($Symbs) && @$Symbs) {
2716: $symb_requirements = '('.
2717: join(' OR ', map{ "(a.symb_id='".&get_symb_id($_->{'symb'}).
2718: "' AND a.part_id='".&get_part_id($_->{'part'}).
2719: "')"
2720: } @$Symbs).')';
2721: }
2722: #
2723: my $student_requirements;
2724: if ( (defined($Sections) && $Sections->[0] ne 'all')) {
2725: $student_requirements = '('.
2726: join(' OR ', map { "b.section='".$_."'" } @$Sections
2727: ).')';
2728: }
2729: #
2730: my $enrollment_requirements=undef;
2731: if (defined($enrollment) && $enrollment ne 'Any') {
2732: $enrollment_requirements = "b.status='".$enrollment."'";
2733: }
2734: #
2735: my $time_requirements = undef;
2736: if (defined($starttime)) {
2737: $time_requirements .= "a.timestamp>='".$starttime."'";
2738: if (defined($endtime)) {
2739: $time_requirements .= " AND a.timestamp<='".$endtime."'";
2740: }
2741: } elsif (defined($endtime)) {
2742: $time_requirements .= "a.timestamp<='".$endtime."'";
2743: }
2744: ##
2745: ##
2746: my $request = 'CREATE TEMPORARY TABLE IF NOT EXISTS '.$tmptable.
2747: ' SELECT a.student_id,SUM(a.awarded) AS score FROM '.
2748: $performance_table.' AS a ';
2749: if (defined($student_requirements) || defined($enrollment_requirements)) {
2750: $request .= ' NATURAL LEFT JOIN '.$student_table.' AS b ';
2751: }
2752: if (defined($symb_requirements) ||
2753: defined($student_requirements) ||
2754: defined($enrollment_requirements) ) {
2755: $request .= ' WHERE ';
2756: }
2757: if (defined($symb_requirements)) {
2758: $request .= $symb_requirements.' AND ';
2759: }
2760: if (defined($student_requirements)) {
2761: $request .= $student_requirements.' AND ';
2762: }
2763: if (defined($enrollment_requirements)) {
2764: $request .= $enrollment_requirements.' AND ';
2765: }
2766: if (defined($time_requirements)) {
2767: $request .= $time_requirements.' AND ';
2768: }
2769: $request =~ s/ AND $//; # Strip of the trailing ' AND '.
2770: $request .= ' GROUP BY a.student_id';
2771: # &Apache::lonnet::logthis("request = \n".$request);
2772: my $sth = $dbh->prepare($request);
2773: $sth->execute();
2774: if ($dbh->err) {
2775: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2776: return undef;
2777: }
2778: $request = 'SELECT score,COUNT(*) FROM '.$tmptable.' GROUP BY score';
2779: # &Apache::lonnet::logthis("request = \n".$request);
2780: $sth = $dbh->prepare($request);
2781: $sth->execute();
2782: if ($dbh->err) {
2783: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2784: return undef;
2785: }
2786: my $dataset = $sth->fetchall_arrayref();
2787: return $dataset;
2788: }
2789:
2790: ################################################
2791: ################################################
2792:
2793: =pod
2794:
2795: =item &setup_table_names()
2796:
2797: input: course id
2798:
2799: output: none
2800:
2801: Cleans up the package variables for local caching.
2802:
2803: =cut
2804:
2805: ################################################
2806: ################################################
2807: sub setup_table_names {
2808: my ($courseid) = @_;
2809: if (! defined($courseid)) {
2810: $courseid = $ENV{'request.course.id'};
2811: }
2812: #
2813: if (! defined($current_course) || $current_course ne $courseid) {
2814: # Clear out variables
2815: $have_read_part_table = 0;
2816: undef(%ids_by_part);
2817: undef(%parts_by_id);
2818: $have_read_symb_table = 0;
2819: undef(%ids_by_symb);
2820: undef(%symbs_by_id);
2821: $have_read_student_table = 0;
2822: undef(%ids_by_student);
2823: undef(%students_by_id);
2824: #
2825: $current_course = $courseid;
2826: }
2827: #
2828: # Set up database names
2829: my $base_id = $courseid;
2830: $symb_table = $base_id.'_'.'symb';
2831: $part_table = $base_id.'_'.'part';
2832: $student_table = $base_id.'_'.'student';
2833: $performance_table = $base_id.'_'.'performance';
2834: $parameters_table = $base_id.'_'.'parameters';
2835: $fulldump_part_table = $base_id.'_'.'partdata';
2836: $fulldump_response_table = $base_id.'_'.'responsedata';
2837: $fulldump_timestamp_table = $base_id.'_'.'timestampdata';
2838: $weight_table = $base_id.'_'.'weight';
2839: #
2840: @Tables = (
2841: $symb_table,
2842: $part_table,
2843: $student_table,
2844: $performance_table,
2845: $parameters_table,
2846: $fulldump_part_table,
2847: $fulldump_response_table,
2848: $fulldump_timestamp_table,
2849: $weight_table,
2850: );
2851: return;
2852: }
2853:
2854: ################################################
2855: ################################################
2856:
2857: =pod
2858:
2859: =back
2860:
2861: =item End of Local Data Caching Subroutines
2862:
2863: =cut
2864:
2865: ################################################
2866: ################################################
2867:
2868: } # End scope of table identifiers
2869:
2870: ################################################
2871: ################################################
2872:
2873: =pod
2874:
2875: =head3 Classlist Subroutines
2876:
2877: =item &get_classlist();
2878:
2879: Retrieve the classist of a given class or of the current class. Student
2880: information is returned from the classlist.db file and, if needed,
2881: from the students environment.
2882:
2883: Optional arguments are $cid, $cdom, and $cnum (course id, course domain,
2884: and course number, respectively). Any omitted arguments will be taken
2885: from the current environment ($ENV{'request.course.id'},
2886: $ENV{'course.'.$cid.'.domain'}, and $ENV{'course.'.$cid.'.num'}).
2887:
2888: Returns a reference to a hash which contains:
2889: keys '$sname:$sdom'
2890: values [$sdom,$sname,$end,$start,$id,$section,$fullname,$status,$type,$lockedtype]
2891:
2892: The constant values CL_SDOM, CL_SNAME, CL_END, etc. can be used
2893: as indices into the returned list to future-proof clients against
2894: changes in the list order.
2895:
2896: =cut
2897:
2898: ################################################
2899: ################################################
2900:
2901: sub CL_SDOM { return 0; }
2902: sub CL_SNAME { return 1; }
2903: sub CL_END { return 2; }
2904: sub CL_START { return 3; }
2905: sub CL_ID { return 4; }
2906: sub CL_SECTION { return 5; }
2907: sub CL_FULLNAME { return 6; }
2908: sub CL_STATUS { return 7; }
2909: sub CL_TYPE { return 8; }
2910: sub CL_LOCKEDTYPE { return 9; }
2911:
2912: sub get_classlist {
2913: my ($cid,$cdom,$cnum) = @_;
2914: $cid = $cid || $ENV{'request.course.id'};
2915: $cdom = $cdom || $ENV{'course.'.$cid.'.domain'};
2916: $cnum = $cnum || $ENV{'course.'.$cid.'.num'};
2917: my $now = time;
2918: #
2919: my %classlist=&Apache::lonnet::dump('classlist',$cdom,$cnum);
2920: while (my ($student,$info) = each(%classlist)) {
2921: if ($student =~ /^(con_lost|error|no_such_host)/i) {
2922: &Apache::lonnet::logthis('get_classlist error for '.$cid.':'.$student);
2923: return undef;
2924: }
2925: my ($sname,$sdom) = split(/:/,$student);
2926: my @Values = split(/:/,$info);
2927: my ($end,$start,$id,$section,$fullname,$type,$lockedtype);
2928: if (@Values > 2) {
2929: ($end,$start,$id,$section,$fullname,$type,$lockedtype) = @Values;
2930: } else { # We have to get the data ourselves
2931: ($end,$start) = @Values;
2932: $section = &Apache::lonnet::getsection($sdom,$sname,$cid);
2933: my %info=&Apache::lonnet::get('environment',
2934: ['firstname','middlename',
2935: 'lastname','generation','id'],
2936: $sdom, $sname);
2937: my ($tmp) = keys(%info);
2938: if ($tmp =~/^(con_lost|error|no_such_host)/i) {
2939: $fullname = 'not available';
2940: $id = 'not available';
2941: &Apache::lonnet::logthis('unable to retrieve environment '.
2942: 'for '.$sname.':'.$sdom);
2943: } else {
2944: $fullname = &ProcessFullName(@info{qw/lastname generation
2945: firstname middlename/});
2946: $id = $info{'id'};
2947: }
2948: # Update the classlist with this students information
2949: if ($fullname ne 'not available') {
2950: my $enrolldata = join(':',$end,$start,$id,$section,$fullname);
2951: my $reply=&Apache::lonnet::cput('classlist',
2952: {$student => $enrolldata},
2953: $cdom,$cnum);
2954: if ($reply !~ /^(ok|delayed)/) {
2955: &Apache::lonnet::logthis('Unable to update classlist for '.
2956: 'student '.$sname.':'.$sdom.
2957: ' error:'.$reply);
2958: }
2959: }
2960: }
2961: my $status='Expired';
2962: if(((!$end) || $now < $end) && ((!$start) || ($now > $start))) {
2963: $status='Active';
2964: }
2965: $classlist{$student} =
2966: [$sdom,$sname,$end,$start,$id,$section,$fullname,$status,$type,$lockedtype];
2967: }
2968: if (wantarray()) {
2969: return (\%classlist,['domain','username','end','start','id',
2970: 'section','fullname','status','type','lockedtype']);
2971: } else {
2972: return \%classlist;
2973: }
2974: }
2975:
2976: # ----- END HELPER FUNCTIONS --------------------------------------------
2977:
2978: 1;
2979: __END__
2980:
2981:
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