Annotation of loncom/interface/loncoursedata.pm, revision 1.128
1.1 stredwic 1: # The LearningOnline Network with CAPA
2: #
1.128 ! matthew 3: # $Id: loncoursedata.pm,v 1.127 2004/03/23 16:35:15 matthew Exp $
1.1 stredwic 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:
1.22 stredwic 37: Set of functions that download and process student and course information.
1.1 stredwic 38:
39: =head1 PACKAGES USED
40:
41: Apache::Constants qw(:common :http)
42: Apache::lonnet()
1.22 stredwic 43: Apache::lonhtmlcommon
1.1 stredwic 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();
1.13 stredwic 54: use Apache::lonhtmlcommon;
1.57 matthew 55: use Time::HiRes;
56: use Apache::lonmysql;
1.1 stredwic 57: use HTML::TokeParser;
58: use GDBM_File;
59:
60: =pod
61:
62: =head1 DOWNLOAD INFORMATION
63:
1.22 stredwic 64: This section contains all the functions that get data from other servers
65: and/or itself.
1.1 stredwic 66:
67: =cut
68:
1.50 matthew 69: ####################################################
70: ####################################################
1.45 matthew 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:
1.61 matthew 81: { title => 'title',
82: symb => 'symb',
83: src => '/s/o/u/r/c/e',
1.45 matthew 84: type => (container|assessment),
1.50 matthew 85: num_assess => 2, # only for container
1.45 matthew 86: parts => [11,13,15], # only for assessment
1.50 matthew 87: response_ids => [12,14,16], # only for assessment
88: contents => [........] # only for container
1.45 matthew 89: }
90:
1.50 matthew 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.
1.49 matthew 95:
1.45 matthew 96:
97: =cut
98:
1.50 matthew 99: ####################################################
100: ####################################################
1.45 matthew 101: sub get_sequence_assessment_data {
102: my $fn=$ENV{'request.course.fn'};
103: ##
104: ## use navmaps
1.83 bowersj2 105: my $navmap = Apache::lonnavmaps::navmap->new();
1.45 matthew 106: if (!defined($navmap)) {
107: return 'Can not open Coursemap';
108: }
1.75 matthew 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: #
1.45 matthew 113: my $iterator = $navmap->getIterator(undef, undef, undef, 1);
1.61 matthew 114: my $curRes = $iterator->next(); # Top level sequence
1.45 matthew 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.
1.76 matthew 121: my $title = $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1.75 matthew 122: my $symb = $top_level_map->symb();
123: my $src = $top_level_map->src();
124: my $randompick = $top_level_map->randompick();
1.45 matthew 125: #
1.49 matthew 126: my @Sequences;
127: my @Assessments;
1.45 matthew 128: my @Nested_Sequences = (); # Stack of sequences, keeps track of depth
129: my $top = { title => $title,
1.52 matthew 130: src => $src,
1.45 matthew 131: symb => $symb,
132: type => 'container',
133: num_assess => 0,
1.53 matthew 134: num_assess_parts => 0,
1.75 matthew 135: contents => [],
136: randompick => $randompick,
137: };
1.49 matthew 138: push (@Sequences,$top);
1.45 matthew 139: push (@Nested_Sequences, $top);
140: #
141: # We need to keep track of which sequences contain homework problems
142: #
1.78 matthew 143: my $previous_too;
1.52 matthew 144: my $previous;
1.45 matthew 145: while (scalar(@Nested_Sequences)) {
1.78 matthew 146: $previous_too = $previous;
1.50 matthew 147: $previous = $curRes;
1.45 matthew 148: $curRes = $iterator->next();
149: my $currentmap = $Nested_Sequences[-1]; # Last one on the stack
150: if ($curRes == $iterator->BEGIN_MAP()) {
1.78 matthew 151: if (! ref($previous)) {
152: $previous = $previous_too;
153: }
154: if (! ref($previous)) {
155: next;
156: }
1.45 matthew 157: # get the map itself, instead of BEGIN_MAP
1.51 matthew 158: $title = $previous->title();
1.84 matthew 159: $title =~ s/\:/\&\#058;/g;
1.51 matthew 160: $symb = $previous->symb();
161: $src = $previous->src();
1.81 matthew 162: # pick up the filename if there is no title available
163: if (! defined($title) || $title eq '') {
164: ($title) = ($src=~/\/([^\/]*)$/);
165: }
1.75 matthew 166: $randompick = $previous->randompick();
1.45 matthew 167: my $newmap = { title => $title,
168: src => $src,
169: symb => $symb,
170: type => 'container',
171: num_assess => 0,
1.75 matthew 172: randompick => $randompick,
1.45 matthew 173: contents => [],
174: };
175: push (@{$currentmap->{'contents'}},$newmap); # this is permanent
1.49 matthew 176: push (@Sequences,$newmap);
1.45 matthew 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));
1.121 matthew 185: next if (! $curRes->is_problem() && $curRes->src() !~ /\.survey$/);
1.45 matthew 186: # Okay, from here on out we only deal with assessments
187: $title = $curRes->title();
1.84 matthew 188: $title =~ s/\:/\&\#058;/g;
1.45 matthew 189: $symb = $curRes->symb();
190: $src = $curRes->src();
1.110 matthew 191: # Grab the filename if there is not title available
192: if (! defined($title) || $title eq '') {
193: ($title) = ($src=~ m:/([^/]*)$:);
194: }
1.45 matthew 195: my $parts = $curRes->parts();
1.87 matthew 196: my %partdata;
197: foreach my $part (@$parts) {
1.88 matthew 198: my @Responses = $curRes->responseType($part);
199: my @Ids = $curRes->responseIds($part);
200: $partdata{$part}->{'ResponseTypes'}= \@Responses;
201: $partdata{$part}->{'ResponseIds'} = \@Ids;
1.91 matthew 202: # Count how many responses of each type there are in this part
203: foreach (@Responses) {
204: $partdata{$part}->{$_}++;
205: }
1.87 matthew 206: }
1.45 matthew 207: my $assessment = { title => $title,
208: src => $src,
209: symb => $symb,
210: type => 'assessment',
1.53 matthew 211: parts => $parts,
212: num_parts => scalar(@$parts),
1.87 matthew 213: partdata => \%partdata,
1.45 matthew 214: };
1.49 matthew 215: push(@Assessments,$assessment);
1.45 matthew 216: push(@{$currentmap->{'contents'}},$assessment);
217: $currentmap->{'num_assess'}++;
1.53 matthew 218: $currentmap->{'num_assess_parts'}+= scalar(@$parts);
1.45 matthew 219: }
1.58 matthew 220: $navmap->untieHashes();
1.49 matthew 221: return ($top,\@Sequences,\@Assessments);
1.45 matthew 222: }
1.50 matthew 223:
1.4 stredwic 224: sub LoadDiscussion {
1.13 stredwic 225: my ($courseID)=@_;
1.5 minaeibi 226: my %Discuss=();
227: my %contrib=&Apache::lonnet::dump(
228: $courseID,
229: $ENV{'course.'.$courseID.'.domain'},
230: $ENV{'course.'.$courseID.'.num'});
231:
232: #my %contrib=&DownloadCourseInformation($name, $courseID, 0);
233:
1.4 stredwic 234: foreach my $temp(keys %contrib) {
235: if ($temp=~/^version/) {
236: my $ver=$contrib{$temp};
237: my ($dummy,$prb)=split(':',$temp);
238: for (my $idx=1; $idx<=$ver; $idx++ ) {
239: my $name=$contrib{"$idx:$prb:sendername"};
1.5 minaeibi 240: $Discuss{"$name:$prb"}=$idx;
1.4 stredwic 241: }
242: }
243: }
1.5 minaeibi 244:
245: return \%Discuss;
1.1 stredwic 246: }
247:
1.71 matthew 248: ################################################
249: ################################################
250:
251: =pod
252:
253: =item &GetUserName(username,userdomain)
254:
255: Returns a hash with the following entries:
256: 'firstname', 'middlename', 'lastname', 'generation', and 'fullname'
257:
258: 'fullname' is the result of &Apache::loncoursedata::ProcessFullName.
259:
260: =cut
261:
262: ################################################
263: ################################################
264: sub GetUserName {
265: my ($username,$userdomain) = @_;
266: $username = $ENV{'user.name'} if (! defined($username));
267: $userdomain = $ENV{'user.domain'} if (! defined($username));
268: my %userenv = &Apache::lonnet::get('environment',
269: ['firstname','middlename','lastname','generation'],
270: $userdomain,$username);
271: $userenv{'fullname'} = &ProcessFullName($userenv{'lastname'},
272: $userenv{'generation'},
273: $userenv{'firstname'},
274: $userenv{'middlename'});
275: return %userenv;
276: }
277:
278: ################################################
279: ################################################
280:
1.1 stredwic 281: =pod
282:
283: =item &ProcessFullName()
284:
285: Takes lastname, generation, firstname, and middlename (or some partial
286: set of this data) and returns the full name version as a string. Format
287: is Lastname generation, firstname middlename or a subset of this.
288:
289: =cut
290:
1.71 matthew 291: ################################################
292: ################################################
1.1 stredwic 293: sub ProcessFullName {
294: my ($lastname, $generation, $firstname, $middlename)=@_;
295: my $Str = '';
296:
1.34 matthew 297: # Strip whitespace preceeding & following name components.
298: $lastname =~ s/(\s+$|^\s+)//g;
299: $generation =~ s/(\s+$|^\s+)//g;
300: $firstname =~ s/(\s+$|^\s+)//g;
301: $middlename =~ s/(\s+$|^\s+)//g;
302:
1.1 stredwic 303: if($lastname ne '') {
1.34 matthew 304: $Str .= $lastname;
305: $Str .= ' '.$generation if ($generation ne '');
306: $Str .= ',';
307: $Str .= ' '.$firstname if ($firstname ne '');
308: $Str .= ' '.$middlename if ($middlename ne '');
1.1 stredwic 309: } else {
1.34 matthew 310: $Str .= $firstname if ($firstname ne '');
311: $Str .= ' '.$middlename if ($middlename ne '');
312: $Str .= ' '.$generation if ($generation ne '');
1.1 stredwic 313: }
314:
315: return $Str;
316: }
317:
1.46 matthew 318: ################################################
319: ################################################
320:
321: =pod
322:
1.47 matthew 323: =item &make_into_hash($values);
324:
325: Returns a reference to a hash as described by $values. $values is
326: assumed to be the result of
1.57 matthew 327: join(':',map {&Apache::lonnet::escape($_)} %orighash);
1.47 matthew 328:
329: This is a helper function for get_current_state.
330:
331: =cut
332:
333: ################################################
334: ################################################
335: sub make_into_hash {
336: my $values = shift;
337: my %tmp = map { &Apache::lonnet::unescape($_); }
338: split(':',$values);
339: return \%tmp;
340: }
341:
342:
343: ################################################
344: ################################################
345:
346: =pod
347:
1.57 matthew 348: =head1 LOCAL DATA CACHING SUBROUTINES
349:
350: The local caching is done using MySQL. There is no fall-back implementation
351: if MySQL is not running.
352:
353: The programmers interface is to call &get_current_state() or some other
354: primary interface subroutine (described below). The internals of this
355: storage system are documented here.
356:
357: There are six tables used to store student performance data (the results of
358: a dumpcurrent). Each of these tables is created in MySQL with a name of
359: $courseid_*****, where ***** is 'symb', 'part', or whatever is appropriate
360: for the table. The tables and their purposes are described below.
361:
362: Some notes before we get started.
363:
364: Each table must have a PRIMARY KEY, which is a column or set of columns which
365: will serve to uniquely identify a row of data. NULL is not allowed!
366:
367: INDEXes work best on integer data.
368:
369: JOIN is used to combine data from many tables into one output.
370:
371: lonmysql.pm is used for some of the interface, specifically the table creation
372: calls. The inserts are done in bulk by directly calling the database handler.
373: The SELECT ... JOIN statement used to retrieve the data does not have an
374: interface in lonmysql.pm and I shudder at the thought of writing one.
375:
376: =head3 Table Descriptions
377:
378: =over 4
379:
1.89 matthew 380: =item Tables used to store meta information
381:
382: The following tables hold data required to keep track of the current status
383: of a students data in the tables or to look up the students data in the tables.
384:
385: =over 4
386:
1.57 matthew 387: =item $symb_table
388:
389: The symb_table has two columns. The first is a 'symb_id' and the second
390: is the text name for the 'symb' (limited to 64k). The 'symb_id' is generated
391: automatically by MySQL so inserts should be done on this table with an
392: empty first element. This table has its PRIMARY KEY on the 'symb_id'.
393:
394: =item $part_table
395:
396: The part_table has two columns. The first is a 'part_id' and the second
397: is the text name for the 'part' (limited to 100 characters). The 'part_id' is
398: generated automatically by MySQL so inserts should be done on this table with
399: an empty first element. This table has its PRIMARY KEY on the 'part' (100
400: characters) and a KEY on 'part_id'.
401:
402: =item $student_table
403:
1.113 matthew 404: The student_table has 7 columns. The first is a 'student_id' assigned by
405: MySQL. The second is 'student' which is username:domain. The third through
406: fifth are 'section', 'status' (enrollment status), and 'classification'
407: (to be used in the future). The sixth and seventh ('updatetime' and
408: 'fullupdatetime') contain the time of last update and full update of student
409: data. This table has its PRIMARY KEY on the 'student_id' column and is indexed
410: on 'student', 'section', and 'status'.
1.89 matthew 411:
412: =back
413:
414: =item Tables used to store current status data
415:
416: The following tables store data only about the students current status on
417: a problem, meaning only the data related to the last attempt on a problem.
418:
419: =over 4
1.57 matthew 420:
421: =item $performance_table
422:
423: The performance_table has 9 columns. The first three are 'symb_id',
424: 'student_id', and 'part_id'. These comprise the PRIMARY KEY for this table
425: and are directly related to the $symb_table, $student_table, and $part_table
426: described above. MySQL does better indexing on numeric items than text,
427: so we use these three "index tables". The remaining columns are
428: 'solved', 'tries', 'awarded', 'award', 'awarddetail', and 'timestamp'.
429: These are either the MySQL type TINYTEXT or various integers ('tries' and
430: 'timestamp'). This table has KEYs of 'student_id' and 'symb_id'.
431: For use of this table, see the functions described below.
432:
433: =item $parameters_table
434:
435: The parameters_table holds the data that does not fit neatly into the
436: performance_table. The parameters table has four columns: 'symb_id',
437: 'student_id', 'parameter', and 'value'. 'symb_id', 'student_id', and
438: 'parameter' comprise the PRIMARY KEY for this table. 'parameter' is
439: limited to 255 characters. 'value' is limited to 64k characters.
440:
441: =back
442:
1.89 matthew 443: =item Tables used for storing historic data
444:
445: The following tables are used to store almost all of the transactions a student
446: has made on a homework problem. See loncapa/docs/homework/datastorage for
447: specific information about each of the parameters stored.
448:
449: =over 4
450:
451: =item $fulldump_response_table
452:
453: The response table holds data (documented in loncapa/docs/homework/datastorage)
454: associated with a particular response id which is stored when a student
455: attempts a problem. The following are the columns of the table, in order:
456: 'symb_id','part_id','response_id','student_id','transaction','tries',
1.93 matthew 457: 'awarddetail', 'response_specific' (data particular to the response
1.89 matthew 458: type), 'response_specific_value', and 'submission (the text of the students
459: submission). The primary key is based on the first five columns listed above.
460:
461: =item $fulldump_part_table
462:
463: The part table holds data (documented in loncapa/docs/homework/datastorage)
464: associated with a particular part id which is stored when a student attempts
465: a problem. The following are the columns of the table, in order:
466: 'symb_id','part_id','student_id','transaction','tries','award','awarded',
467: and 'previous'. The primary key is based on the first five columns listed
468: above.
469:
470: =item $fulldump_timestamp_table
471:
472: The timestamp table holds the timestamps of the transactions which are
473: stored in $fulldump_response_table and $fulldump_part_table. This data is
474: about both the response and part data. Columns: 'symb_id','student_id',
475: 'transaction', and 'timestamp'.
476: The primary key is based on the first 3 columns.
477:
1.127 matthew 478: =item $weight_table
479:
480: The weight table holds the weight for the problems used in the class.
481: Whereas the weight of a problem can vary by section and student the data
482: here is applied to the class as a whole.
483: Columns: 'symb_id','part_id','response_id','weight'.
484:
1.89 matthew 485: =back
486:
487: =back
488:
1.57 matthew 489: =head3 Important Subroutines
490:
491: Here is a brief overview of the subroutines which are likely to be of
492: interest:
493:
494: =over 4
495:
496: =item &get_current_state(): programmers interface.
497:
498: =item &init_dbs(): table creation
499:
500: =item &update_student_data(): data storage calls
501:
502: =item &get_student_data_from_performance_cache(): data retrieval
503:
504: =back
505:
506: =head3 Main Documentation
507:
508: =over 4
509:
510: =cut
511:
512: ################################################
513: ################################################
514:
515: ################################################
516: ################################################
1.89 matthew 517: { # Begin scope of table identifiers
1.57 matthew 518:
519: my $current_course ='';
520: my $symb_table;
521: my $part_table;
522: my $student_table;
523: my $performance_table;
524: my $parameters_table;
1.89 matthew 525: my $fulldump_response_table;
526: my $fulldump_part_table;
527: my $fulldump_timestamp_table;
1.127 matthew 528: my $weight_table;
1.57 matthew 529:
1.89 matthew 530: my @Tables;
1.57 matthew 531: ################################################
532: ################################################
533:
534: =pod
535:
536: =item &init_dbs()
537:
538: Input: course id
539:
540: Output: 0 on success, positive integer on error
541:
542: This routine issues the calls to lonmysql to create the tables used to
543: store student data.
544:
545: =cut
546:
547: ################################################
548: ################################################
549: sub init_dbs {
550: my $courseid = shift;
551: &setup_table_names($courseid);
552: #
1.73 matthew 553: # Drop any of the existing tables
1.89 matthew 554: foreach my $table (@Tables) {
1.73 matthew 555: &Apache::lonmysql::drop_table($table);
556: }
557: #
1.57 matthew 558: # Note - changes to this table must be reflected in the code that
559: # stores the data (calls &Apache::lonmysql::store_row with this table
560: # id
561: my $symb_table_def = {
562: id => $symb_table,
563: permanent => 'no',
564: columns => [{ name => 'symb_id',
565: type => 'MEDIUMINT UNSIGNED',
566: restrictions => 'NOT NULL',
567: auto_inc => 'yes', },
568: { name => 'symb',
569: type => 'MEDIUMTEXT',
570: restrictions => 'NOT NULL'},
571: ],
572: 'PRIMARY KEY' => ['symb_id'],
573: };
574: #
575: my $part_table_def = {
576: id => $part_table,
577: permanent => 'no',
578: columns => [{ name => 'part_id',
579: type => 'MEDIUMINT UNSIGNED',
580: restrictions => 'NOT NULL',
581: auto_inc => 'yes', },
582: { name => 'part',
583: type => 'VARCHAR(100)',
584: restrictions => 'NOT NULL'},
585: ],
586: 'PRIMARY KEY' => ['part (100)'],
587: 'KEY' => [{ columns => ['part_id']},],
588: };
589: #
590: my $student_table_def = {
591: id => $student_table,
592: permanent => 'no',
593: columns => [{ name => 'student_id',
594: type => 'MEDIUMINT UNSIGNED',
595: restrictions => 'NOT NULL',
596: auto_inc => 'yes', },
597: { name => 'student',
598: type => 'VARCHAR(100)',
1.113 matthew 599: restrictions => 'NOT NULL UNIQUE'},
600: { name => 'section',
601: type => 'VARCHAR(100)',
602: restrictions => 'NOT NULL'},
603: { name => 'status',
604: type => 'VARCHAR(15)',
1.57 matthew 605: restrictions => 'NOT NULL'},
1.85 matthew 606: { name => 'classification',
607: type => 'varchar(100)', },
1.57 matthew 608: { name => 'updatetime',
1.89 matthew 609: type => 'INT UNSIGNED'},
610: { name => 'fullupdatetime',
611: type => 'INT UNSIGNED'},
1.57 matthew 612: ],
1.87 matthew 613: 'PRIMARY KEY' => ['student_id'],
1.113 matthew 614: 'KEY' => [{ columns => ['student (100)',
615: 'section (100)',
616: 'status (15)',]},],
1.57 matthew 617: };
618: #
619: my $performance_table_def = {
620: id => $performance_table,
621: permanent => 'no',
622: columns => [{ name => 'symb_id',
623: type => 'MEDIUMINT UNSIGNED',
624: restrictions => 'NOT NULL' },
625: { name => 'student_id',
626: type => 'MEDIUMINT UNSIGNED',
627: restrictions => 'NOT NULL' },
628: { name => 'part_id',
629: type => 'MEDIUMINT UNSIGNED',
630: restrictions => 'NOT NULL' },
1.73 matthew 631: { name => 'part',
632: type => 'VARCHAR(100)',
633: restrictions => 'NOT NULL'},
1.57 matthew 634: { name => 'solved',
635: type => 'TINYTEXT' },
636: { name => 'tries',
637: type => 'SMALLINT UNSIGNED' },
638: { name => 'awarded',
1.127 matthew 639: type => 'REAL' },
1.57 matthew 640: { name => 'award',
641: type => 'TINYTEXT' },
642: { name => 'awarddetail',
643: type => 'TINYTEXT' },
644: { name => 'timestamp',
645: type => 'INT UNSIGNED'},
646: ],
647: 'PRIMARY KEY' => ['symb_id','student_id','part_id'],
648: 'KEY' => [{ columns=>['student_id'] },
649: { columns=>['symb_id'] },],
650: };
651: #
1.89 matthew 652: my $fulldump_part_table_def = {
653: id => $fulldump_part_table,
654: permanent => 'no',
655: columns => [
656: { name => 'symb_id',
657: type => 'MEDIUMINT UNSIGNED',
658: restrictions => 'NOT NULL' },
659: { name => 'part_id',
660: type => 'MEDIUMINT UNSIGNED',
661: restrictions => 'NOT NULL' },
662: { name => 'student_id',
663: type => 'MEDIUMINT UNSIGNED',
664: restrictions => 'NOT NULL' },
665: { name => 'transaction',
666: type => 'MEDIUMINT UNSIGNED',
667: restrictions => 'NOT NULL' },
668: { name => 'tries',
669: type => 'SMALLINT UNSIGNED',
670: restrictions => 'NOT NULL' },
671: { name => 'award',
672: type => 'TINYTEXT' },
673: { name => 'awarded',
1.127 matthew 674: type => 'REAL' },
1.89 matthew 675: { name => 'previous',
676: type => 'SMALLINT UNSIGNED' },
677: # { name => 'regrader',
678: # type => 'TINYTEXT' },
679: # { name => 'afterduedate',
680: # type => 'TINYTEXT' },
681: ],
682: 'PRIMARY KEY' => ['symb_id','part_id','student_id','transaction'],
683: 'KEY' => [
684: { columns=>['symb_id'] },
685: { columns=>['part_id'] },
686: { columns=>['student_id'] },
687: ],
688: };
689: #
690: my $fulldump_response_table_def = {
691: id => $fulldump_response_table,
692: permanent => 'no',
693: columns => [
694: { name => 'symb_id',
695: type => 'MEDIUMINT UNSIGNED',
696: restrictions => 'NOT NULL' },
697: { name => 'part_id',
698: type => 'MEDIUMINT UNSIGNED',
699: restrictions => 'NOT NULL' },
700: { name => 'response_id',
701: type => 'MEDIUMINT UNSIGNED',
702: restrictions => 'NOT NULL' },
703: { name => 'student_id',
704: type => 'MEDIUMINT UNSIGNED',
705: restrictions => 'NOT NULL' },
706: { name => 'transaction',
707: type => 'MEDIUMINT UNSIGNED',
708: restrictions => 'NOT NULL' },
709: { name => 'awarddetail',
710: type => 'TINYTEXT' },
711: # { name => 'message',
712: # type => 'CHAR' },
713: { name => 'response_specific',
714: type => 'TINYTEXT' },
715: { name => 'response_specific_value',
716: type => 'TINYTEXT' },
717: { name => 'submission',
718: type => 'TEXT'},
719: ],
720: 'PRIMARY KEY' => ['symb_id','part_id','response_id','student_id',
721: 'transaction'],
722: 'KEY' => [
723: { columns=>['symb_id'] },
724: { columns=>['part_id','response_id'] },
725: { columns=>['student_id'] },
726: ],
727: };
728: my $fulldump_timestamp_table_def = {
729: id => $fulldump_timestamp_table,
730: permanent => 'no',
731: columns => [
732: { name => 'symb_id',
733: type => 'MEDIUMINT UNSIGNED',
734: restrictions => 'NOT NULL' },
735: { name => 'student_id',
736: type => 'MEDIUMINT UNSIGNED',
737: restrictions => 'NOT NULL' },
738: { name => 'transaction',
739: type => 'MEDIUMINT UNSIGNED',
740: restrictions => 'NOT NULL' },
741: { name => 'timestamp',
742: type => 'INT UNSIGNED'},
743: ],
744: 'PRIMARY KEY' => ['symb_id','student_id','transaction'],
745: 'KEY' => [
746: { columns=>['symb_id'] },
747: { columns=>['student_id'] },
748: { columns=>['transaction'] },
749: ],
750: };
751: #
1.57 matthew 752: my $parameters_table_def = {
753: id => $parameters_table,
754: permanent => 'no',
755: columns => [{ name => 'symb_id',
756: type => 'MEDIUMINT UNSIGNED',
757: restrictions => 'NOT NULL' },
758: { name => 'student_id',
759: type => 'MEDIUMINT UNSIGNED',
760: restrictions => 'NOT NULL' },
761: { name => 'parameter',
762: type => 'TINYTEXT',
763: restrictions => 'NOT NULL' },
764: { name => 'value',
765: type => 'MEDIUMTEXT' },
766: ],
767: 'PRIMARY KEY' => ['symb_id','student_id','parameter (255)'],
768: };
769: #
1.127 matthew 770: my $weight_table_def = {
771: id => $weight_table,
772: permanent => 'no',
773: columns => [{ name => 'symb_id',
774: type => 'MEDIUMINT UNSIGNED',
775: restrictions => 'NOT NULL' },
776: { name => 'part_id',
777: type => 'MEDIUMINT UNSIGNED',
778: restrictions => 'NOT NULL' },
779: { name => 'weight',
780: type => 'REAL',
781: restrictions => 'NOT NULL' },
782: ],
783: 'PRIMARY KEY' => ['symb_id','part_id'],
784: };
785: #
1.57 matthew 786: # Create the tables
787: my $tableid;
788: $tableid = &Apache::lonmysql::create_table($symb_table_def);
789: if (! defined($tableid)) {
790: &Apache::lonnet::logthis("error creating symb_table: ".
791: &Apache::lonmysql::get_error());
792: return 1;
793: }
794: #
795: $tableid = &Apache::lonmysql::create_table($part_table_def);
796: if (! defined($tableid)) {
797: &Apache::lonnet::logthis("error creating part_table: ".
798: &Apache::lonmysql::get_error());
799: return 2;
800: }
801: #
802: $tableid = &Apache::lonmysql::create_table($student_table_def);
803: if (! defined($tableid)) {
804: &Apache::lonnet::logthis("error creating student_table: ".
805: &Apache::lonmysql::get_error());
806: return 3;
807: }
808: #
809: $tableid = &Apache::lonmysql::create_table($performance_table_def);
810: if (! defined($tableid)) {
811: &Apache::lonnet::logthis("error creating preformance_table: ".
812: &Apache::lonmysql::get_error());
813: return 5;
814: }
815: #
816: $tableid = &Apache::lonmysql::create_table($parameters_table_def);
817: if (! defined($tableid)) {
818: &Apache::lonnet::logthis("error creating parameters_table: ".
819: &Apache::lonmysql::get_error());
820: return 6;
821: }
1.89 matthew 822: #
823: $tableid = &Apache::lonmysql::create_table($fulldump_part_table_def);
824: if (! defined($tableid)) {
825: &Apache::lonnet::logthis("error creating fulldump_part_table: ".
826: &Apache::lonmysql::get_error());
827: return 7;
828: }
829: #
830: $tableid = &Apache::lonmysql::create_table($fulldump_response_table_def);
831: if (! defined($tableid)) {
832: &Apache::lonnet::logthis("error creating fulldump_response_table: ".
833: &Apache::lonmysql::get_error());
834: return 8;
835: }
836: $tableid = &Apache::lonmysql::create_table($fulldump_timestamp_table_def);
837: if (! defined($tableid)) {
838: &Apache::lonnet::logthis("error creating fulldump_timestamp_table: ".
839: &Apache::lonmysql::get_error());
840: return 9;
841: }
1.127 matthew 842: $tableid = &Apache::lonmysql::create_table($weight_table_def);
843: if (! defined($tableid)) {
844: &Apache::lonnet::logthis("error creating weight_table: ".
845: &Apache::lonmysql::get_error());
846: return 10;
847: }
1.57 matthew 848: return 0;
1.70 matthew 849: }
850:
851: ################################################
852: ################################################
853:
854: =pod
855:
856: =item &delete_caches()
857:
858: =cut
859:
860: ################################################
861: ################################################
862: sub delete_caches {
863: my $courseid = shift;
864: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
865: #
866: &setup_table_names($courseid);
867: #
868: my $dbh = &Apache::lonmysql::get_dbh();
1.89 matthew 869: foreach my $table (@Tables) {
1.70 matthew 870: my $command = 'DROP TABLE '.$table.';';
871: $dbh->do($command);
872: if ($dbh->err) {
873: &Apache::lonnet::logthis($command.' resulted in error: '.$dbh->errstr);
874: }
875: }
876: return;
1.57 matthew 877: }
878:
879: ################################################
880: ################################################
881:
882: =pod
883:
884: =item &get_part_id()
885:
886: Get the MySQL id of a problem part string.
887:
888: Input: $part
889:
890: Output: undef on error, integer $part_id on success.
891:
892: =item &get_part()
893:
894: Get the string describing a part from the MySQL id of the problem part.
895:
896: Input: $part_id
897:
898: Output: undef on error, $part string on success.
899:
900: =cut
901:
902: ################################################
903: ################################################
904:
1.61 matthew 905: my $have_read_part_table = 0;
1.57 matthew 906: my %ids_by_part;
907: my %parts_by_id;
908:
909: sub get_part_id {
910: my ($part) = @_;
1.61 matthew 911: $part = 0 if (! defined($part));
912: if (! $have_read_part_table) {
913: my @Result = &Apache::lonmysql::get_rows($part_table);
914: foreach (@Result) {
915: $ids_by_part{$_->[1]}=$_->[0];
916: }
917: $have_read_part_table = 1;
918: }
1.57 matthew 919: if (! exists($ids_by_part{$part})) {
920: &Apache::lonmysql::store_row($part_table,[undef,$part]);
921: undef(%ids_by_part);
922: my @Result = &Apache::lonmysql::get_rows($part_table);
923: foreach (@Result) {
924: $ids_by_part{$_->[1]}=$_->[0];
925: }
926: }
927: return $ids_by_part{$part} if (exists($ids_by_part{$part}));
928: return undef; # error
929: }
930:
931: sub get_part {
932: my ($part_id) = @_;
933: if (! exists($parts_by_id{$part_id}) ||
934: ! defined($parts_by_id{$part_id}) ||
935: $parts_by_id{$part_id} eq '') {
936: my @Result = &Apache::lonmysql::get_rows($part_table);
937: foreach (@Result) {
938: $parts_by_id{$_->[0]}=$_->[1];
939: }
940: }
941: return $parts_by_id{$part_id} if(exists($parts_by_id{$part_id}));
942: return undef; # error
943: }
944:
945: ################################################
946: ################################################
947:
948: =pod
949:
950: =item &get_symb_id()
951:
952: Get the MySQL id of a symb.
953:
954: Input: $symb
955:
956: Output: undef on error, integer $symb_id on success.
957:
958: =item &get_symb()
959:
960: Get the symb associated with a MySQL symb_id.
961:
962: Input: $symb_id
963:
964: Output: undef on error, $symb on success.
965:
966: =cut
967:
968: ################################################
969: ################################################
970:
1.61 matthew 971: my $have_read_symb_table = 0;
1.57 matthew 972: my %ids_by_symb;
973: my %symbs_by_id;
974:
975: sub get_symb_id {
976: my ($symb) = @_;
1.61 matthew 977: if (! $have_read_symb_table) {
978: my @Result = &Apache::lonmysql::get_rows($symb_table);
979: foreach (@Result) {
980: $ids_by_symb{$_->[1]}=$_->[0];
981: }
982: $have_read_symb_table = 1;
983: }
1.57 matthew 984: if (! exists($ids_by_symb{$symb})) {
985: &Apache::lonmysql::store_row($symb_table,[undef,$symb]);
986: undef(%ids_by_symb);
987: my @Result = &Apache::lonmysql::get_rows($symb_table);
988: foreach (@Result) {
989: $ids_by_symb{$_->[1]}=$_->[0];
990: }
991: }
992: return $ids_by_symb{$symb} if(exists( $ids_by_symb{$symb}));
993: return undef; # error
994: }
995:
996: sub get_symb {
997: my ($symb_id) = @_;
998: if (! exists($symbs_by_id{$symb_id}) ||
999: ! defined($symbs_by_id{$symb_id}) ||
1000: $symbs_by_id{$symb_id} eq '') {
1001: my @Result = &Apache::lonmysql::get_rows($symb_table);
1002: foreach (@Result) {
1003: $symbs_by_id{$_->[0]}=$_->[1];
1004: }
1005: }
1006: return $symbs_by_id{$symb_id} if(exists( $symbs_by_id{$symb_id}));
1007: return undef; # error
1008: }
1009:
1010: ################################################
1011: ################################################
1012:
1013: =pod
1014:
1015: =item &get_student_id()
1016:
1017: Get the MySQL id of a student.
1018:
1019: Input: $sname, $dom
1020:
1021: Output: undef on error, integer $student_id on success.
1022:
1023: =item &get_student()
1024:
1025: Get student username:domain associated with the MySQL student_id.
1026:
1027: Input: $student_id
1028:
1029: Output: undef on error, string $student (username:domain) on success.
1030:
1031: =cut
1032:
1033: ################################################
1034: ################################################
1035:
1.61 matthew 1036: my $have_read_student_table = 0;
1.57 matthew 1037: my %ids_by_student;
1038: my %students_by_id;
1039:
1040: sub get_student_id {
1041: my ($sname,$sdom) = @_;
1042: my $student = $sname.':'.$sdom;
1.61 matthew 1043: if (! $have_read_student_table) {
1044: my @Result = &Apache::lonmysql::get_rows($student_table);
1045: foreach (@Result) {
1046: $ids_by_student{$_->[1]}=$_->[0];
1047: }
1048: $have_read_student_table = 1;
1049: }
1.57 matthew 1050: if (! exists($ids_by_student{$student})) {
1.113 matthew 1051: &populate_student_table();
1.57 matthew 1052: undef(%ids_by_student);
1.113 matthew 1053: undef(%students_by_id);
1.57 matthew 1054: my @Result = &Apache::lonmysql::get_rows($student_table);
1055: foreach (@Result) {
1056: $ids_by_student{$_->[1]}=$_->[0];
1057: }
1058: }
1059: return $ids_by_student{$student} if(exists( $ids_by_student{$student}));
1060: return undef; # error
1061: }
1062:
1063: sub get_student {
1064: my ($student_id) = @_;
1065: if (! exists($students_by_id{$student_id}) ||
1066: ! defined($students_by_id{$student_id}) ||
1067: $students_by_id{$student_id} eq '') {
1068: my @Result = &Apache::lonmysql::get_rows($student_table);
1069: foreach (@Result) {
1070: $students_by_id{$_->[0]}=$_->[1];
1071: }
1072: }
1073: return $students_by_id{$student_id} if(exists($students_by_id{$student_id}));
1074: return undef; # error
1075: }
1.99 matthew 1076:
1.113 matthew 1077: sub populate_student_table {
1078: my ($courseid) = @_;
1079: if (! defined($courseid)) {
1080: $courseid = $ENV{'request.course.id'};
1081: }
1082: #
1083: &setup_table_names($courseid);
1084: my $dbh = &Apache::lonmysql::get_dbh();
1085: my $request = 'INSERT IGNORE INTO '.$student_table.
1086: "(student,section,status) VALUES ";
1087: my $classlist = &get_classlist($courseid);
1088: my $student_count=0;
1089: while (my ($student,$data) = each %$classlist) {
1090: my ($section,$status) = ($data->[&CL_SECTION()],
1091: $data->[&CL_STATUS()]);
1092: if ($section eq '' || $section =~ /^\s*$/) {
1093: $section = 'none';
1094: }
1095: $request .= "('".$student."','".$section."','".$status."'),";
1096: $student_count++;
1097: }
1098: return if ($student_count == 0);
1099: chop($request);
1100: $dbh->do($request);
1101: if ($dbh->err()) {
1102: &Apache::lonnet::logthis("error ".$dbh->errstr().
1103: " occured executing \n".
1104: $request);
1105: }
1106: return;
1107: }
1108:
1.99 matthew 1109: ################################################
1110: ################################################
1111:
1112: =pod
1113:
1114: =item &clear_internal_caches()
1115:
1116: Causes the internal caches used in get_student_id, get_student,
1117: get_symb_id, get_symb, get_part_id, and get_part to be undef'd.
1118:
1119: Needs to be called before the first operation with the MySQL database
1120: for a given Apache request.
1121:
1122: =cut
1123:
1124: ################################################
1125: ################################################
1126: sub clear_internal_caches {
1127: $have_read_part_table = 0;
1128: undef(%ids_by_part);
1129: undef(%parts_by_id);
1130: $have_read_symb_table = 0;
1131: undef(%ids_by_symb);
1132: undef(%symbs_by_id);
1133: $have_read_student_table = 0;
1134: undef(%ids_by_student);
1135: undef(%students_by_id);
1136: }
1137:
1.57 matthew 1138:
1139: ################################################
1140: ################################################
1141:
1142: =pod
1143:
1.89 matthew 1144: =item &update_full_student_data($sname,$sdom,$courseid)
1145:
1146: Does a lonnet::dump on a student to populate the courses tables.
1147:
1148: Input: $sname, $sdom, $courseid
1149:
1150: Output: $returnstatus
1151:
1152: $returnstatus is a string describing any errors that occured. 'okay' is the
1153: default.
1154:
1155: This subroutine loads a students data using lonnet::dump and inserts
1156: it into the MySQL database. The inserts are done on three tables,
1157: $fulldump_response_table, $fulldump_part_table, and $fulldump_timestamp_table.
1158: The INSERT calls are made directly by this subroutine, not through lonmysql
1159: because we do a 'bulk'insert which takes advantage of MySQLs non-SQL
1160: compliant INSERT command to insert multiple rows at a time.
1161: If anything has gone wrong during this process, $returnstatus is updated with
1162: a description of the error.
1163:
1164: Once the "fulldump" tables are updated, the tables used for chart and
1165: spreadsheet (which hold only the current state of the student on their
1166: homework, not historical data) are updated. If all updates have occured
1.113 matthew 1167: successfully, $student_table is updated to reflect the time of the update.
1.89 matthew 1168:
1169: Notice we do not insert the data and immediately query it. This means it
1170: is possible for there to be data returned this first time that is not
1171: available the second time. CYA.
1172:
1173: =cut
1174:
1175: ################################################
1176: ################################################
1177: sub update_full_student_data {
1178: my ($sname,$sdom,$courseid) = @_;
1179: #
1180: # Set up database names
1181: &setup_table_names($courseid);
1182: #
1183: my $student_id = &get_student_id($sname,$sdom);
1184: my $student = $sname.':'.$sdom;
1185: #
1186: my $returnstatus = 'okay';
1187: #
1188: # Download students data
1189: my $time_of_retrieval = time;
1190: my @tmp = &Apache::lonnet::dump($courseid,$sdom,$sname);
1191: if (@tmp && $tmp[0] =~ /^error/) {
1192: $returnstatus = 'error retrieving full student data';
1193: return $returnstatus;
1194: } elsif (! @tmp) {
1195: $returnstatus = 'okay: no student data';
1196: return $returnstatus;
1197: }
1198: my %studentdata = @tmp;
1199: #
1200: # Get database handle and clean out the tables
1201: my $dbh = &Apache::lonmysql::get_dbh();
1202: $dbh->do('DELETE FROM '.$fulldump_response_table.' WHERE student_id='.
1203: $student_id);
1204: $dbh->do('DELETE FROM '.$fulldump_part_table.' WHERE student_id='.
1205: $student_id);
1206: $dbh->do('DELETE FROM '.$fulldump_timestamp_table.' WHERE student_id='.
1207: $student_id);
1208: #
1209: # Parse and store the data into a form we can handle
1210: my $partdata;
1211: my $respdata;
1212: while (my ($key,$value) = each(%studentdata)) {
1213: next if ($key =~ /^(\d+):(resource$|subnum$|keys:)/);
1214: my ($transaction,$symb,$parameter) = split(':',$key);
1215: my $symb_id = &get_symb_id($symb);
1216: if ($parameter eq 'timestamp') {
1217: # We can deal with 'timestamp' right away
1218: my @timestamp_storage = ($symb_id,$student_id,
1219: $transaction,$value);
1.98 matthew 1220: my $store_command = 'INSERT IGNORE INTO '.$fulldump_timestamp_table.
1.89 matthew 1221: " VALUES ('".join("','",@timestamp_storage)."');";
1222: $dbh->do($store_command);
1223: if ($dbh->err()) {
1224: &Apache::lonnet::logthis('unable to execute '.$store_command);
1225: &Apache::lonnet::logthis($dbh->errstr());
1226: }
1227: next;
1228: } elsif ($parameter eq 'version') {
1229: next;
1.90 matthew 1230: } elsif ($parameter =~ /^resource\.(.*)\.(tries|
1231: award|
1232: awarded|
1233: previous|
1234: solved|
1235: awarddetail|
1236: submission|
1237: submissiongrading|
1238: molecule)\s*$/x){
1.89 matthew 1239: # we do not have enough information to store an
1240: # entire row, so we save it up until later.
1241: my ($part_and_resp_id,$field) = ($1,$2);
1242: my ($part,$part_id,$resp,$resp_id);
1243: if ($part_and_resp_id =~ /\./) {
1244: ($part,$resp) = split(/\./,$part_and_resp_id);
1245: $part_id = &get_part_id($part);
1246: $resp_id = &get_part_id($resp);
1247: } else {
1248: $part_id = &get_part_id($part_and_resp_id);
1249: }
1.90 matthew 1250: # Deal with part specific data
1.89 matthew 1251: if ($field =~ /^(tries|award|awarded|previous)$/) {
1252: $partdata->{$symb_id}->{$part_id}->{$transaction}->{$field}=$value;
1253: }
1.90 matthew 1254: # deal with response specific data
1.89 matthew 1255: if (defined($resp_id) &&
1.100 matthew 1256: $field =~ /^(awarddetail|
1.90 matthew 1257: submission|
1258: submissiongrading|
1259: molecule)$/x) {
1.89 matthew 1260: if ($field eq 'submission') {
1261: # We have to be careful with user supplied input.
1262: # most of the time we are okay because it is escaped.
1263: # However, there is one wrinkle: submissions which end in
1264: # and odd number of '\' cause insert errors to occur.
1265: # Best trap this somehow...
1.116 matthew 1266: $value = $dbh->quote($value);
1.89 matthew 1267: }
1.90 matthew 1268: if ($field eq 'submissiongrading' ||
1269: $field eq 'molecule') {
1270: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific'}=$field;
1271: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific_value'}=$value;
1272: } else {
1273: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{$field}=$value;
1274: }
1.89 matthew 1275: }
1276: }
1277: }
1278: ##
1279: ## Store the part data
1.98 matthew 1280: my $store_command = 'INSERT IGNORE INTO '.$fulldump_part_table.
1.89 matthew 1281: ' VALUES '."\n";
1282: my $store_rows = 0;
1283: while (my ($symb_id,$hash1) = each (%$partdata)) {
1284: while (my ($part_id,$hash2) = each (%$hash1)) {
1285: while (my ($transaction,$data) = each (%$hash2)) {
1286: $store_command .= "('".join("','",$symb_id,$part_id,
1287: $student_id,
1288: $transaction,
1.101 matthew 1289: $data->{'tries'},
1.89 matthew 1290: $data->{'award'},
1291: $data->{'awarded'},
1292: $data->{'previous'})."'),";
1293: $store_rows++;
1294: }
1295: }
1296: }
1297: if ($store_rows) {
1298: chop($store_command);
1299: $dbh->do($store_command);
1300: if ($dbh->err) {
1301: $returnstatus = 'error storing part data';
1302: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
1303: &Apache::lonnet::logthis("While attempting\n".$store_command);
1304: }
1305: }
1306: ##
1307: ## Store the response data
1.98 matthew 1308: $store_command = 'INSERT IGNORE INTO '.$fulldump_response_table.
1.89 matthew 1309: ' VALUES '."\n";
1310: $store_rows = 0;
1311: while (my ($symb_id,$hash1) = each (%$respdata)) {
1312: while (my ($part_id,$hash2) = each (%$hash1)) {
1313: while (my ($resp_id,$hash3) = each (%$hash2)) {
1314: while (my ($transaction,$data) = each (%$hash3)) {
1.112 matthew 1315: my $submission = $data->{'submission'};
1316: # We have to be careful with user supplied input.
1317: # most of the time we are okay because it is escaped.
1318: # However, there is one wrinkle: submissions which end in
1319: # and odd number of '\' cause insert errors to occur.
1320: # Best trap this somehow...
1321: $submission = $dbh->quote($submission);
1322: $store_command .= "('".
1323: join("','",$symb_id,$part_id,
1324: $resp_id,$student_id,
1325: $transaction,
1326: $data->{'awarddetail'},
1327: $data->{'response_specific'},
1328: $data->{'response_specific_value'}).
1329: "',".$submission."),";
1.89 matthew 1330: $store_rows++;
1331: }
1332: }
1333: }
1334: }
1335: if ($store_rows) {
1336: chop($store_command);
1337: $dbh->do($store_command);
1338: if ($dbh->err) {
1339: $returnstatus = 'error storing response data';
1340: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
1341: &Apache::lonnet::logthis("While attempting\n".$store_command);
1342: }
1343: }
1344: ##
1345: ## Update the students "current" data in the performance
1346: ## and parameters tables.
1347: my ($status,undef) = &store_student_data
1348: ($sname,$sdom,$courseid,
1349: &Apache::lonnet::convert_dump_to_currentdump(\%studentdata));
1350: if ($returnstatus eq 'okay' && $status ne 'okay') {
1351: $returnstatus = 'error storing current data:'.$status;
1352: } elsif ($status ne 'okay') {
1353: $returnstatus .= ' error storing current data:'.$status;
1354: }
1355: ##
1356: ## Update the students time......
1357: if ($returnstatus eq 'okay') {
1.113 matthew 1358: &store_updatetime($student_id,$time_of_retrieval,$time_of_retrieval);
1359: if ($dbh->err) {
1360: if ($returnstatus eq 'okay') {
1361: $returnstatus = 'error updating student time';
1362: } else {
1363: $returnstatus = 'error updating student time';
1364: }
1365: }
1.89 matthew 1366: }
1367: return $returnstatus;
1368: }
1369:
1370: ################################################
1371: ################################################
1372:
1373: =pod
1374:
1.57 matthew 1375: =item &update_student_data()
1376:
1377: Input: $sname, $sdom, $courseid
1378:
1379: Output: $returnstatus, \%student_data
1380:
1381: $returnstatus is a string describing any errors that occured. 'okay' is the
1382: default.
1383: \%student_data is the data returned by a call to lonnet::currentdump.
1384:
1385: This subroutine loads a students data using lonnet::currentdump and inserts
1386: it into the MySQL database. The inserts are done on two tables,
1387: $performance_table and $parameters_table. $parameters_table holds the data
1388: that is not included in $performance_table. See the description of
1389: $performance_table elsewhere in this file. The INSERT calls are made
1390: directly by this subroutine, not through lonmysql because we do a 'bulk'
1391: insert which takes advantage of MySQLs non-SQL compliant INSERT command to
1392: insert multiple rows at a time. If anything has gone wrong during this
1393: process, $returnstatus is updated with a description of the error and
1394: \%student_data is returned.
1395:
1396: Notice we do not insert the data and immediately query it. This means it
1397: is possible for there to be data returned this first time that is not
1398: available the second time. CYA.
1399:
1400: =cut
1401:
1402: ################################################
1403: ################################################
1404: sub update_student_data {
1405: my ($sname,$sdom,$courseid) = @_;
1406: #
1.60 matthew 1407: # Set up database names
1408: &setup_table_names($courseid);
1409: #
1.57 matthew 1410: my $student_id = &get_student_id($sname,$sdom);
1411: my $student = $sname.':'.$sdom;
1412: #
1413: my $returnstatus = 'okay';
1414: #
1415: # Download students data
1416: my $time_of_retrieval = time;
1417: my @tmp = &Apache::lonnet::currentdump($courseid,$sdom,$sname);
1418: if ((scalar(@tmp) > 0) && ($tmp[0] =~ /^error:/)) {
1419: &Apache::lonnet::logthis('error getting data for '.
1420: $sname.':'.$sdom.' in course '.$courseid.
1421: ':'.$tmp[0]);
1422: $returnstatus = 'error getting data';
1.79 matthew 1423: return ($returnstatus,undef);
1.57 matthew 1424: }
1425: if (scalar(@tmp) < 1) {
1426: return ('no data',undef);
1427: }
1428: my %student_data = @tmp;
1.89 matthew 1429: my @Results = &store_student_data($sname,$sdom,$courseid,\%student_data);
1430: #
1431: # Set the students update time
1.96 matthew 1432: if ($Results[0] eq 'okay') {
1.113 matthew 1433: &store_updatetime($student_id,$time_of_retrieval,$time_of_retrieval);
1.95 matthew 1434: }
1.89 matthew 1435: #
1436: return @Results;
1437: }
1438:
1.113 matthew 1439: sub store_updatetime {
1440: my ($student_id,$updatetime,$fullupdatetime)=@_;
1441: my $values = '';
1442: if (defined($updatetime)) {
1443: $values = 'updatetime='.$updatetime.' ';
1444: }
1445: if (defined($fullupdatetime)) {
1446: if ($values ne '') {
1447: $values .= ',';
1448: }
1449: $values .= 'fullupdatetime='.$fullupdatetime.' ';
1450: }
1451: return if ($values eq '');
1452: my $dbh = &Apache::lonmysql::get_dbh();
1453: my $request = 'UPDATE '.$student_table.' SET '.$values.
1454: ' WHERE student_id='.$student_id.' LIMIT 1';
1455: $dbh->do($request);
1456: }
1457:
1.89 matthew 1458: sub store_student_data {
1459: my ($sname,$sdom,$courseid,$student_data) = @_;
1460: #
1461: my $student_id = &get_student_id($sname,$sdom);
1462: my $student = $sname.':'.$sdom;
1463: #
1464: my $returnstatus = 'okay';
1.57 matthew 1465: #
1466: # Remove all of the students data from the table
1.60 matthew 1467: my $dbh = &Apache::lonmysql::get_dbh();
1468: $dbh->do('DELETE FROM '.$performance_table.' WHERE student_id='.
1469: $student_id);
1470: $dbh->do('DELETE FROM '.$parameters_table.' WHERE student_id='.
1471: $student_id);
1.57 matthew 1472: #
1473: # Store away the data
1474: #
1475: my $starttime = Time::HiRes::time;
1476: my $elapsed = 0;
1477: my $rows_stored;
1.98 matthew 1478: my $store_parameters_command = 'INSERT IGNORE INTO '.$parameters_table.
1.60 matthew 1479: ' VALUES '."\n";
1.61 matthew 1480: my $num_parameters = 0;
1.98 matthew 1481: my $store_performance_command = 'INSERT IGNORE INTO '.$performance_table.
1.60 matthew 1482: ' VALUES '."\n";
1.79 matthew 1483: return ('error',undef) if (! defined($dbh));
1.89 matthew 1484: while (my ($current_symb,$param_hash) = each(%{$student_data})) {
1.57 matthew 1485: #
1486: # make sure the symb is set up properly
1487: my $symb_id = &get_symb_id($current_symb);
1488: #
1489: # Load data into the tables
1.63 matthew 1490: while (my ($parameter,$value) = each(%$param_hash)) {
1.57 matthew 1491: my $newstring;
1.63 matthew 1492: if ($parameter !~ /(timestamp|resource\.(.*)\.(solved|tries|awarded|award|awarddetail|previous))/) {
1.57 matthew 1493: $newstring = "('".join("','",
1494: $symb_id,$student_id,
1.69 matthew 1495: $parameter)."',".
1496: $dbh->quote($value)."),\n";
1.61 matthew 1497: $num_parameters ++;
1.57 matthew 1498: if ($newstring !~ /''/) {
1499: $store_parameters_command .= $newstring;
1500: $rows_stored++;
1501: }
1502: }
1503: next if ($parameter !~ /^resource\.(.*)\.solved$/);
1504: #
1505: my $part = $1;
1506: my $part_id = &get_part_id($part);
1507: next if (!defined($part_id));
1508: my $solved = $value;
1509: my $tries = $param_hash->{'resource.'.$part.'.tries'};
1510: my $awarded = $param_hash->{'resource.'.$part.'.awarded'};
1511: my $award = $param_hash->{'resource.'.$part.'.award'};
1512: my $awarddetail = $param_hash->{'resource.'.$part.'.awarddetail'};
1513: my $timestamp = $param_hash->{'timestamp'};
1.60 matthew 1514: #
1.74 matthew 1515: $solved = '' if (! defined($solved));
1.57 matthew 1516: $tries = '' if (! defined($tries));
1517: $awarded = '' if (! defined($awarded));
1518: $award = '' if (! defined($award));
1519: $awarddetail = '' if (! defined($awarddetail));
1.73 matthew 1520: $newstring = "('".join("','",$symb_id,$student_id,$part_id,$part,
1.57 matthew 1521: $solved,$tries,$awarded,$award,
1.63 matthew 1522: $awarddetail,$timestamp)."'),\n";
1.57 matthew 1523: $store_performance_command .= $newstring;
1524: $rows_stored++;
1525: }
1526: }
1527: chop $store_parameters_command;
1.60 matthew 1528: chop $store_parameters_command;
1529: chop $store_performance_command;
1.57 matthew 1530: chop $store_performance_command;
1531: my $start = Time::HiRes::time;
1.94 matthew 1532: $dbh->do($store_performance_command);
1533: if ($dbh->err()) {
1534: &Apache::lonnet::logthis(' bigass insert error:'.$dbh->errstr());
1535: &Apache::lonnet::logthis('command = '.$store_performance_command);
1536: $returnstatus = 'error: unable to insert performance into database';
1537: return ($returnstatus,$student_data);
1538: }
1.61 matthew 1539: $dbh->do($store_parameters_command) if ($num_parameters>0);
1.57 matthew 1540: if ($dbh->err()) {
1541: &Apache::lonnet::logthis(' bigass insert error:'.$dbh->errstr());
1.61 matthew 1542: &Apache::lonnet::logthis('command = '.$store_parameters_command);
1.87 matthew 1543: &Apache::lonnet::logthis('rows_stored = '.$rows_stored);
1544: &Apache::lonnet::logthis('student_id = '.$student_id);
1.57 matthew 1545: $returnstatus = 'error: unable to insert parameters into database';
1.89 matthew 1546: return ($returnstatus,$student_data);
1.57 matthew 1547: }
1548: $elapsed += Time::HiRes::time - $start;
1.89 matthew 1549: return ($returnstatus,$student_data);
1.57 matthew 1550: }
1551:
1.89 matthew 1552: ######################################
1553: ######################################
1.57 matthew 1554:
1555: =pod
1556:
1.89 matthew 1557: =item &ensure_tables_are_set_up($courseid)
1.57 matthew 1558:
1.89 matthew 1559: Checks to be sure the MySQL tables for the given class are set up.
1560: If $courseid is omitted it will be obtained from the environment.
1.57 matthew 1561:
1.89 matthew 1562: Returns nothing on success and 'error' on failure
1.57 matthew 1563:
1564: =cut
1565:
1.89 matthew 1566: ######################################
1567: ######################################
1568: sub ensure_tables_are_set_up {
1569: my ($courseid) = @_;
1.61 matthew 1570: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1571: #
1572: # Clean out package variables
1.57 matthew 1573: &setup_table_names($courseid);
1574: #
1575: # if the tables do not exist, make them
1576: my @CurrentTable = &Apache::lonmysql::tables_in_db();
1.113 matthew 1577: my ($found_symb,$found_student,$found_part,
1.89 matthew 1578: $found_performance,$found_parameters,$found_fulldump_part,
1.127 matthew 1579: $found_fulldump_response,$found_fulldump_timestamp,
1580: $found_weight);
1.57 matthew 1581: foreach (@CurrentTable) {
1582: $found_symb = 1 if ($_ eq $symb_table);
1583: $found_student = 1 if ($_ eq $student_table);
1584: $found_part = 1 if ($_ eq $part_table);
1585: $found_performance = 1 if ($_ eq $performance_table);
1586: $found_parameters = 1 if ($_ eq $parameters_table);
1.89 matthew 1587: $found_fulldump_part = 1 if ($_ eq $fulldump_part_table);
1588: $found_fulldump_response = 1 if ($_ eq $fulldump_response_table);
1589: $found_fulldump_timestamp = 1 if ($_ eq $fulldump_timestamp_table);
1.127 matthew 1590: $found_weight = 1 if ($_ eq $weight_table);
1.57 matthew 1591: }
1.127 matthew 1592: if (!$found_symb ||
1593: !$found_student || !$found_part ||
1594: !$found_performance || !$found_parameters ||
1.89 matthew 1595: !$found_fulldump_part || !$found_fulldump_response ||
1.127 matthew 1596: !$found_fulldump_timestamp || !$found_weight ) {
1.57 matthew 1597: if (&init_dbs($courseid)) {
1.89 matthew 1598: return 'error';
1.57 matthew 1599: }
1600: }
1.89 matthew 1601: }
1602:
1603: ################################################
1604: ################################################
1605:
1606: =pod
1607:
1608: =item &ensure_current_data()
1609:
1610: Input: $sname, $sdom, $courseid
1611:
1612: Output: $status, $data
1613:
1614: This routine ensures the data for a given student is up to date.
1.113 matthew 1615: The $student_table is queried to determine the time of the last update.
1.89 matthew 1616: If the students data is out of date, &update_student_data() is called.
1617: The return values from the call to &update_student_data() are returned.
1618:
1619: =cut
1620:
1621: ################################################
1622: ################################################
1623: sub ensure_current_data {
1624: my ($sname,$sdom,$courseid) = @_;
1625: my $status = 'okay'; # return value
1626: #
1627: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1628: &ensure_tables_are_set_up($courseid);
1.57 matthew 1629: #
1630: # Get the update time for the user
1631: my $updatetime = 0;
1.60 matthew 1632: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1633: ($sdom,$sname,$courseid.'.db',
1634: $Apache::lonnet::perlvar{'lonUsersDir'});
1.57 matthew 1635: #
1.87 matthew 1636: my $student_id = &get_student_id($sname,$sdom);
1.113 matthew 1637: my @Result = &Apache::lonmysql::get_rows($student_table,
1.87 matthew 1638: "student_id ='$student_id'");
1.57 matthew 1639: my $data = undef;
1640: if (@Result) {
1.113 matthew 1641: $updatetime = $Result[0]->[5]; # Ack! This is dumb!
1.57 matthew 1642: }
1643: if ($modifiedtime > $updatetime) {
1644: ($status,$data) = &update_student_data($sname,$sdom,$courseid);
1645: }
1646: return ($status,$data);
1647: }
1648:
1649: ################################################
1650: ################################################
1651:
1652: =pod
1653:
1.89 matthew 1654: =item &ensure_current_full_data($sname,$sdom,$courseid)
1655:
1656: Input: $sname, $sdom, $courseid
1657:
1658: Output: $status
1659:
1660: This routine ensures the fulldata (the data from a lonnet::dump, not a
1661: lonnet::currentdump) for a given student is up to date.
1.113 matthew 1662: The $student_table is queried to determine the time of the last update.
1.89 matthew 1663: If the students fulldata is out of date, &update_full_student_data() is
1664: called.
1665:
1666: The return value from the call to &update_full_student_data() is returned.
1667:
1668: =cut
1669:
1670: ################################################
1671: ################################################
1672: sub ensure_current_full_data {
1673: my ($sname,$sdom,$courseid) = @_;
1674: my $status = 'okay'; # return value
1675: #
1676: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1677: &ensure_tables_are_set_up($courseid);
1678: #
1679: # Get the update time for the user
1680: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1681: ($sdom,$sname,$courseid.'.db',
1682: $Apache::lonnet::perlvar{'lonUsersDir'});
1683: #
1684: my $student_id = &get_student_id($sname,$sdom);
1.113 matthew 1685: my @Result = &Apache::lonmysql::get_rows($student_table,
1.89 matthew 1686: "student_id ='$student_id'");
1687: my $updatetime;
1688: if (@Result && ref($Result[0]) eq 'ARRAY') {
1.113 matthew 1689: $updatetime = $Result[0]->[6];
1.89 matthew 1690: }
1691: if (! defined($updatetime) || $modifiedtime > $updatetime) {
1692: $status = &update_full_student_data($sname,$sdom,$courseid);
1693: }
1694: return $status;
1695: }
1696:
1697: ################################################
1698: ################################################
1699:
1700: =pod
1701:
1.57 matthew 1702: =item &get_student_data_from_performance_cache()
1703:
1704: Input: $sname, $sdom, $symb, $courseid
1705:
1706: Output: hash reference containing the data for the given student.
1707: If $symb is undef, all the students data is returned.
1708:
1709: This routine is the heart of the local caching system. See the description
1710: of $performance_table, $symb_table, $student_table, and $part_table. The
1711: main task is building the MySQL request. The tables appear in the request
1712: in the order in which they should be parsed by MySQL. When searching
1713: on a student the $student_table is used to locate the 'student_id'. All
1714: rows in $performance_table which have a matching 'student_id' are returned,
1715: with data from $part_table and $symb_table which match the entries in
1716: $performance_table, 'part_id' and 'symb_id'. When searching on a symb,
1717: the $symb_table is processed first, with matching rows grabbed from
1718: $performance_table and filled in from $part_table and $student_table in
1719: that order.
1720:
1721: Running 'EXPLAIN ' on the 'SELECT' statements generated can be quite
1722: interesting, especially if you play with the order the tables are listed.
1723:
1724: =cut
1725:
1726: ################################################
1727: ################################################
1728: sub get_student_data_from_performance_cache {
1729: my ($sname,$sdom,$symb,$courseid)=@_;
1730: my $student = $sname.':'.$sdom if (defined($sname) && defined($sdom));
1.61 matthew 1731: &setup_table_names($courseid);
1.57 matthew 1732: #
1733: # Return hash
1734: my $studentdata;
1735: #
1736: my $dbh = &Apache::lonmysql::get_dbh();
1737: my $request = "SELECT ".
1.73 matthew 1738: "d.symb,a.part,a.solved,a.tries,a.awarded,a.award,a.awarddetail,".
1.63 matthew 1739: "a.timestamp ";
1.57 matthew 1740: if (defined($student)) {
1741: $request .= "FROM $student_table AS b ".
1742: "LEFT JOIN $performance_table AS a ON b.student_id=a.student_id ".
1.73 matthew 1743: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1.57 matthew 1744: "LEFT JOIN $symb_table AS d ON d.symb_id = a.symb_id ".
1745: "WHERE student='$student'";
1746: if (defined($symb) && $symb ne '') {
1.67 matthew 1747: $request .= " AND d.symb=".$dbh->quote($symb);
1.57 matthew 1748: }
1749: } elsif (defined($symb) && $symb ne '') {
1750: $request .= "FROM $symb_table as d ".
1751: "LEFT JOIN $performance_table AS a ON d.symb_id=a.symb_id ".
1.73 matthew 1752: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1.57 matthew 1753: "LEFT JOIN $student_table AS b ON b.student_id = a.student_id ".
1754: "WHERE symb='".$dbh->quote($symb)."'";
1755: }
1756: my $starttime = Time::HiRes::time;
1757: my $rows_retrieved = 0;
1758: my $sth = $dbh->prepare($request);
1759: $sth->execute();
1760: if ($sth->err()) {
1761: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1762: &Apache::lonnet::logthis("\n".$request."\n");
1763: &Apache::lonnet::logthis("error is:".$sth->errstr());
1764: return undef;
1765: }
1766: foreach my $row (@{$sth->fetchall_arrayref}) {
1767: $rows_retrieved++;
1.63 matthew 1768: my ($symb,$part,$solved,$tries,$awarded,$award,$awarddetail,$time) =
1.57 matthew 1769: (@$row);
1770: my $base = 'resource.'.$part;
1771: $studentdata->{$symb}->{$base.'.solved'} = $solved;
1772: $studentdata->{$symb}->{$base.'.tries'} = $tries;
1773: $studentdata->{$symb}->{$base.'.awarded'} = $awarded;
1774: $studentdata->{$symb}->{$base.'.award'} = $award;
1775: $studentdata->{$symb}->{$base.'.awarddetail'} = $awarddetail;
1776: $studentdata->{$symb}->{'timestamp'} = $time if (defined($time) && $time ne '');
1.67 matthew 1777: }
1.97 matthew 1778: ## Get misc parameters
1779: $request = 'SELECT c.symb,a.parameter,a.value '.
1780: "FROM $student_table AS b ".
1781: "LEFT JOIN $parameters_table AS a ON b.student_id=a.student_id ".
1782: "LEFT JOIN $symb_table AS c ON c.symb_id = a.symb_id ".
1783: "WHERE student='$student'";
1784: if (defined($symb) && $symb ne '') {
1785: $request .= " AND c.symb=".$dbh->quote($symb);
1786: }
1787: $sth = $dbh->prepare($request);
1788: $sth->execute();
1789: if ($sth->err()) {
1790: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1791: &Apache::lonnet::logthis("\n".$request."\n");
1792: &Apache::lonnet::logthis("error is:".$sth->errstr());
1793: if (defined($symb) && $symb ne '') {
1794: $studentdata = $studentdata->{$symb};
1795: }
1796: return $studentdata;
1797: }
1798: #
1799: foreach my $row (@{$sth->fetchall_arrayref}) {
1800: $rows_retrieved++;
1801: my ($symb,$parameter,$value) = (@$row);
1802: $studentdata->{$symb}->{$parameter} = $value;
1803: }
1804: #
1.67 matthew 1805: if (defined($symb) && $symb ne '') {
1806: $studentdata = $studentdata->{$symb};
1.57 matthew 1807: }
1808: return $studentdata;
1809: }
1810:
1811: ################################################
1812: ################################################
1813:
1814: =pod
1815:
1816: =item &get_current_state()
1817:
1818: Input: $sname,$sdom,$symb,$courseid
1819:
1820: Output: Described below
1.46 matthew 1821:
1.47 matthew 1822: Retrieve the current status of a students performance. $sname and
1.46 matthew 1823: $sdom are the only required parameters. If $symb is undef the results
1.47 matthew 1824: of an &Apache::lonnet::currentdump() will be returned.
1.46 matthew 1825: If $courseid is undef it will be retrieved from the environment.
1826:
1827: The return structure is based on &Apache::lonnet::currentdump. If
1828: $symb is unspecified, all the students data is returned in a hash of
1829: the form:
1830: (
1831: symb1 => { param1 => value1, param2 => value2 ... },
1832: symb2 => { param1 => value1, param2 => value2 ... },
1833: )
1834:
1835: If $symb is specified, a hash of
1836: (
1837: param1 => value1,
1838: param2 => value2,
1839: )
1840: is returned.
1841:
1.57 matthew 1842: If no data is found for $symb, or if the student has no performance data,
1.46 matthew 1843: an empty list is returned.
1844:
1845: =cut
1846:
1847: ################################################
1848: ################################################
1849: sub get_current_state {
1.47 matthew 1850: my ($sname,$sdom,$symb,$courseid,$forcedownload)=@_;
1851: #
1.46 matthew 1852: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1.47 matthew 1853: #
1.61 matthew 1854: return () if (! defined($sname) || ! defined($sdom));
1855: #
1.57 matthew 1856: my ($status,$data) = &ensure_current_data($sname,$sdom,$courseid);
1.77 matthew 1857: # &Apache::lonnet::logthis
1858: # ('sname = '.$sname.
1859: # ' domain = '.$sdom.
1860: # ' status = '.$status.
1861: # ' data is '.(defined($data)?'defined':'undefined'));
1.73 matthew 1862: # while (my ($symb,$hash) = each(%$data)) {
1863: # &Apache::lonnet::logthis($symb."\n----------------------------------");
1864: # while (my ($key,$value) = each (%$hash)) {
1865: # &Apache::lonnet::logthis(" ".$key." = ".$value);
1866: # }
1867: # }
1.47 matthew 1868: #
1.79 matthew 1869: if (defined($data) && defined($symb) && ref($data->{$symb})) {
1870: return %{$data->{$symb}};
1871: } elsif (defined($data) && ! defined($symb) && ref($data)) {
1872: return %$data;
1873: }
1874: if ($status eq 'no data') {
1.57 matthew 1875: return ();
1876: } else {
1877: if ($status ne 'okay' && $status ne '') {
1878: &Apache::lonnet::logthis('status = '.$status);
1.47 matthew 1879: return ();
1880: }
1.57 matthew 1881: my $returnhash = &get_student_data_from_performance_cache($sname,$sdom,
1882: $symb,$courseid);
1883: return %$returnhash if (defined($returnhash));
1.46 matthew 1884: }
1.57 matthew 1885: return ();
1.61 matthew 1886: }
1887:
1888: ################################################
1889: ################################################
1890:
1891: =pod
1892:
1893: =item &get_problem_statistics()
1894:
1895: Gather data on a given problem. The database is assumed to be
1896: populated and all local caching variables are assumed to be set
1897: properly. This means you need to call &ensure_current_data for
1898: the students you are concerned with prior to calling this routine.
1899:
1.124 matthew 1900: Inputs: $Sections, $status, $symb, $part, $courseid, $starttime, $endtime
1.61 matthew 1901:
1.64 matthew 1902: =over 4
1903:
1.124 matthew 1904: =item $Sections Array ref containing section names for students.
1905: 'all' is allowed to be the first (and only) item in the array.
1906:
1907: =item $status String describing the status of students
1.64 matthew 1908:
1909: =item $symb is the symb for the problem.
1910:
1911: =item $part is the part id you need statistics for
1912:
1913: =item $courseid is the course id, of course!
1914:
1.122 matthew 1915: =item $starttime and $endtime are unix times which to use to limit
1916: the statistical data.
1917:
1.64 matthew 1918: =back
1919:
1.66 matthew 1920: Outputs: See the code for up to date information. A hash reference is
1921: returned. The hash has the following keys defined:
1.64 matthew 1922:
1923: =over 4
1924:
1.66 matthew 1925: =item num_students The number of students attempting the problem
1926:
1927: =item tries The total number of tries for the students
1928:
1929: =item max_tries The maximum number of tries taken
1930:
1931: =item mean_tries The average number of tries
1932:
1933: =item num_solved The number of students able to solve the problem
1934:
1935: =item num_override The number of students whose answer is 'correct_by_override'
1936:
1937: =item deg_of_diff The degree of difficulty of the problem
1938:
1939: =item std_tries The standard deviation of the number of tries
1940:
1941: =item skew_tries The skew of the number of tries
1.64 matthew 1942:
1.66 matthew 1943: =item per_wrong The number of students attempting the problem who were not
1944: able to answer it correctly.
1.64 matthew 1945:
1946: =back
1947:
1.61 matthew 1948: =cut
1949:
1950: ################################################
1951: ################################################
1952: sub get_problem_statistics {
1.122 matthew 1953: my ($Sections,$status,$symb,$part,$courseid,$starttime,$endtime) = @_;
1.61 matthew 1954: return if (! defined($symb) || ! defined($part));
1955: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1956: #
1.100 matthew 1957: &setup_table_names($courseid);
1.61 matthew 1958: my $symb_id = &get_symb_id($symb);
1959: my $part_id = &get_part_id($part);
1960: my $stats_table = $courseid.'_problem_stats';
1961: #
1962: my $dbh = &Apache::lonmysql::get_dbh();
1963: return undef if (! defined($dbh));
1964: #
1.123 matthew 1965: # Clean out the table
1.61 matthew 1966: $dbh->do('DROP TABLE '.$stats_table); # May return an error
1967: my $request =
1.115 matthew 1968: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
1969: 'SELECT a.student_id,a.solved,a.award,a.awarded,a.tries '.
1970: 'FROM '.$performance_table.' AS a ';
1.123 matthew 1971: #
1972: # See if we need to include some requirements on the students
1.115 matthew 1973: if ((defined($Sections) && lc($Sections->[0]) ne 'all') ||
1974: (defined($status) && lc($status) ne 'any')) {
1975: $request .= 'NATURAL LEFT JOIN '.$student_table.' AS b ';
1976: }
1977: $request .= ' WHERE a.symb_id='.$symb_id.' AND a.part_id='.$part_id;
1.123 matthew 1978: #
1979: # Limit the students included to those specified
1.115 matthew 1980: if (defined($Sections) && lc($Sections->[0]) ne 'all') {
1.64 matthew 1981: $request .= ' AND ('.
1.115 matthew 1982: join(' OR ', map { "b.section='".$_."'" } @$Sections
1.64 matthew 1983: ).')';
1984: }
1.115 matthew 1985: if (defined($status) && lc($status) ne 'any') {
1986: $request .= " AND b.status='".$status."'";
1.122 matthew 1987: }
1988: #
1.123 matthew 1989: # Limit by starttime and endtime
1.122 matthew 1990: my $time_requirements = undef;
1991: if (defined($starttime)) {
1992: $time_requirements .= 'a.timestamp>='.$starttime;
1993: if (defined($endtime)) {
1994: $time_requirements .= ' AND a.timestamp<='.$endtime;
1995: }
1996: } elsif (defined($endtime)) {
1997: $time_requirements .= 'a.timestamp<='.$endtime;
1998: }
1999: if (defined($time_requirements)) {
2000: $request .= ' AND '.$time_requirements;
1.115 matthew 2001: }
1.123 matthew 2002: #
2003: # Finally, execute the request to create the temporary table
1.61 matthew 2004: $dbh->do($request);
1.123 matthew 2005: #
2006: # Collect the first suite of statistics
1.128 ! matthew 2007: $request = 'SELECT COUNT(*),SUM(tries),'.
! 2008: 'AVG(tries),STD(tries) '.
1.109 matthew 2009: 'FROM '.$stats_table;
1.128 ! matthew 2010: my ($num,$tries,$mean,$STD) = &execute_SQL_request
1.109 matthew 2011: ($dbh,$request);
1.128 ! matthew 2012: #
! 2013: $request = 'SELECT MAX(tries),MIN(tries) FROM '.$stats_table.
! 2014: ' WHERE awarded>0';
! 2015: if (defined($time_requirements)) {
! 2016: $request .= ' AND '.$time_requirements;
! 2017: }
! 2018: my ($max,$min) = &execute_SQL_request($dbh,$request);
! 2019: #
1.109 matthew 2020: $request = 'SELECT SUM(awarded) FROM '.$stats_table;
1.128 ! matthew 2021: if (defined($time_requirements)) {
! 2022: $request .= ' AND '.$time_requirements;
! 2023: }
1.109 matthew 2024: my ($Solved) = &execute_SQL_request($dbh,$request);
1.128 ! matthew 2025: #
1.109 matthew 2026: $request = 'SELECT SUM(awarded) FROM '.$stats_table.
2027: " WHERE solved='correct_by_override'";
1.128 ! matthew 2028: if (defined($time_requirements)) {
! 2029: $request .= ' AND '.$time_requirements;
! 2030: }
1.109 matthew 2031: my ($solved) = &execute_SQL_request($dbh,$request);
2032: #
1.61 matthew 2033: $num = 0 if (! defined($num));
2034: $tries = 0 if (! defined($tries));
1.128 ! matthew 2035: $max = 0 if (! defined($max));
! 2036: $min = 0 if (! defined($min));
1.61 matthew 2037: $STD = 0 if (! defined($STD));
2038: $Solved = 0 if (! defined($Solved));
2039: $solved = 0 if (! defined($solved));
2040: #
1.123 matthew 2041: # Compute the more complicated statistics
1.61 matthew 2042: my $DegOfDiff = 'nan';
1.66 matthew 2043: $DegOfDiff = 1-($Solved)/$tries if ($tries>0);
1.123 matthew 2044: #
1.61 matthew 2045: my $SKEW = 'nan';
1.66 matthew 2046: my $wrongpercent = 0;
1.128 ! matthew 2047: my $numwrong = 'nan';
1.61 matthew 2048: if ($num > 0) {
2049: ($SKEW) = &execute_SQL_request($dbh,'SELECT SQRT(SUM('.
2050: 'POWER(tries - '.$STD.',3)'.
2051: '))/'.$num.' FROM '.$stats_table);
1.128 ! matthew 2052: $numwrong = $num-$Solved;
! 2053: $wrongpercent=int(10*100*$numwrong/$num)/10;
1.61 matthew 2054: }
2055: #
1.123 matthew 2056: # Drop the temporary table
2057: $dbh->do('DROP TABLE '.$stats_table); # May return an error
1.81 matthew 2058: #
2059: # Store in metadata
1.80 www 2060: if ($num) {
2061: my %storestats=();
1.123 matthew 2062: #
1.86 www 2063: my $urlres=(&Apache::lonnet::decode_symb($symb))[2];
1.123 matthew 2064: #
1.80 www 2065: $storestats{$courseid.'___'.$urlres.'___timestamp'}=time;
2066: $storestats{$courseid.'___'.$urlres.'___stdno'}=$num;
2067: $storestats{$courseid.'___'.$urlres.'___avetries'}=$mean;
2068: $storestats{$courseid.'___'.$urlres.'___difficulty'}=$DegOfDiff;
1.123 matthew 2069: #
1.80 www 2070: $urlres=~/^(\w+)\/(\w+)/;
2071: &Apache::lonnet::put('nohist_resevaldata',\%storestats,$1,$2);
2072: }
1.81 matthew 2073: #
2074: # Return result
1.66 matthew 2075: return { num_students => $num,
2076: tries => $tries,
1.128 ! matthew 2077: max_tries => $max,
! 2078: min_tries => $min,
1.66 matthew 2079: mean_tries => $mean,
2080: std_tries => $STD,
2081: skew_tries => $SKEW,
2082: num_solved => $Solved,
2083: num_override => $solved,
1.128 ! matthew 2084: num_wrong => $numwrong,
1.66 matthew 2085: per_wrong => $wrongpercent,
1.81 matthew 2086: deg_of_diff => $DegOfDiff };
1.61 matthew 2087: }
2088:
1.127 matthew 2089: ##
2090: ## This is a helper for get_statistics
1.61 matthew 2091: sub execute_SQL_request {
2092: my ($dbh,$request)=@_;
2093: # &Apache::lonnet::logthis($request);
2094: my $sth = $dbh->prepare($request);
2095: $sth->execute();
2096: my $row = $sth->fetchrow_arrayref();
2097: if (ref($row) eq 'ARRAY' && scalar(@$row)>0) {
2098: return @$row;
2099: }
2100: return ();
2101: }
1.123 matthew 2102:
1.127 matthew 2103: ######################################################
2104: ######################################################
2105:
2106: =pod
2107:
2108: =item &populate_weight_table
2109:
2110: =cut
2111:
2112: ######################################################
2113: ######################################################
2114: sub populate_weight_table {
2115: my ($courseid) = @_;
2116: if (! defined($courseid)) {
2117: $courseid = $ENV{'request.course.id'};
2118: }
2119: #
2120: &setup_table_names($courseid);
2121: my ($top,$sequences,$assessments) = get_sequence_assessment_data();
2122: if (! defined($top) || ! ref($top)) {
2123: # There has been an error, better report it
2124: &Apache::lonnet::logthis('top is undefined');
2125: return;
2126: }
2127: # Since we use lonnet::EXT to retrieve problem weights,
2128: # to ensure current data we must clear the caches out.
2129: &Apache::lonnet::clear_EXT_cache_status();
2130: my $dbh = &Apache::lonmysql::get_dbh();
2131: my $request = 'INSERT IGNORE INTO '.$weight_table.
2132: "(symb_id,part_id,weight) VALUES ";
2133: my $weight;
2134: foreach my $res (@$assessments) {
2135: my $symb_id = &get_symb_id($res->{'symb'});
2136: foreach my $part (@{$res->{'parts'}}) {
2137: my $part_id = &get_part_id($part);
2138: $weight = &Apache::lonnet::EXT('resource.'.$part.'.weight',
2139: $res->{'symb'},
2140: undef,undef,undef);
2141: if (!defined($weight) || ($weight eq '')) {
2142: $weight=1;
2143: }
2144: $request .= "('".$symb_id."','".$part_id."','".$weight."'),";
2145: }
2146: }
2147: $request =~ s/(,)$//;
2148: # &Apache::lonnet::logthis('request = '.$/.$request);
2149: $dbh->do($request);
2150: if ($dbh->err()) {
2151: &Apache::lonnet::logthis("error ".$dbh->errstr().
2152: " occured executing \n".
2153: $request);
2154: }
2155: return;
2156: }
2157:
2158: ##########################################################
2159: ##########################################################
1.61 matthew 2160:
1.127 matthew 2161: =pod
2162:
2163: =item &limit_by_section_and_status
2164:
2165: Build SQL WHERE condition which limits the data collected by section and
2166: student status.
2167:
2168: Inputs: $Sections (array ref)
2169: $enrollment (string: 'any', 'expired', 'active')
2170: $tablename The name of the table that holds the student data
2171:
2172: Returns: $student_requirements,$enrollment_requirements
2173:
2174: =cut
2175:
2176: ##########################################################
2177: ##########################################################
2178: sub limit_by_section_and_status {
2179: my ($Sections,$enrollment,$tablename) = @_;
2180: my $student_requirements = undef;
2181: if ( (defined($Sections) && $Sections->[0] ne 'all')) {
2182: $student_requirements = '('.
2183: join(' OR ', map { $tablename.".section='".$_."'" } @$Sections
2184: ).')';
2185: }
2186: #
2187: my $enrollment_requirements=undef;
2188: if (defined($enrollment) && $enrollment ne 'Any') {
2189: $enrollment_requirements = $tablename.".status='".$enrollment."'";
2190: }
2191: return ($student_requirements,$enrollment_requirements);
2192: }
2193:
2194: ######################################################
2195: ######################################################
2196:
2197: =pod
2198:
2199: =item rank_students_by_scores_on_resources
2200:
2201: Inputs:
2202: $resources: array ref of hash ref. Each hash ref needs key 'symb'.
2203: $Sections: array ref of sections to include,
2204: $enrollment: string,
2205: $courseid (may be omitted)
2206:
2207: Returns; An array of arrays. The sub arrays contain a student name and
2208: their score on the resources.
2209:
2210: =cut
2211:
2212: ######################################################
2213: ######################################################
2214: sub RNK_student { return 0; };
2215: sub RNK_score { return 1; };
2216:
2217: sub rank_students_by_scores_on_resources {
2218: my ($resources,$Sections,$enrollment,$courseid) = @_;
2219: return if (! defined($resources) || ! ref($resources) eq 'ARRAY');
2220: if (! defined($courseid)) {
2221: $courseid = $ENV{'request.course.id'};
2222: }
2223: #
2224: &setup_table_names($courseid);
2225: my $dbh = &Apache::lonmysql::get_dbh();
2226: my ($section_limits,$enrollment_limits)=
2227: &limit_by_section_and_status($Sections,$enrollment,'b');
2228: my $symb_limits = '('.join(' OR ',map {'a.symb_id='.&get_symb_id($_);
2229: } @$resources
2230: ).')';
2231: my $request = 'SELECT b.student,SUM(a.awarded*w.weight) AS score FROM '.
2232: $performance_table.' AS a '.
2233: 'NATURAL LEFT JOIN '.$weight_table.' AS w '.
2234: 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.
2235: 'WHERE ';
2236: if (defined($section_limits)) {
2237: $request .= $section_limits.' AND ';
2238: }
2239: if (defined($enrollment_limits)) {
2240: $request .= $enrollment_limits.' AND ';
2241: }
2242: if ($symb_limits ne '()') {
2243: $request .= $symb_limits.' AND ';
2244: }
2245: $request =~ s/( AND )$//; # Remove extra conjunction
2246: $request =~ s/( WHERE )$//; # In case there were no limits placed on it
2247: $request .= ' GROUP BY a.student_id ORDER BY score';
2248: #&Apache::lonnet::logthis('request = '.$/.$request);
2249: my $sth = $dbh->prepare($request);
2250: $sth->execute();
2251: my $rows = $sth->fetchall_arrayref();
2252: return ($rows);
2253: }
2254:
2255: ########################################################
2256: ########################################################
2257:
2258: =pod
2259:
2260: =item &get_sum_of_scores
2261:
2262: Inputs: $resource (hash ref, needs {'symb'} key),
2263: $part, (the part id),
2264: $students (array ref, contents of array are scalars holding 'sname:sdom'),
2265: $courseid
2266:
2267: Returns: the sum of the score on the problem part over the students and the
2268: maximum possible value for the sum (taken from the weight table).
2269:
2270: =cut
2271:
2272: ########################################################
2273: ########################################################
2274: sub get_sum_of_scores {
2275: my ($resource,$part,$students,$courseid) = @_;
2276: if (! defined($courseid)) {
2277: $courseid = $ENV{'request.course.id'};
2278: }
2279: #
2280: &setup_table_names($courseid);
2281: my $dbh = &Apache::lonmysql::get_dbh();
2282: my $request = 'SELECT SUM(a.awarded*w.weight),SUM(w.weight) FROM '.
2283: $performance_table.' AS a '.
2284: 'NATURAL LEFT JOIN '.$weight_table.' AS w ';
2285: $request .= 'WHERE a.symb_id='.&get_symb_id($resource->{'symb'}).
2286: ' AND a.part_id='.&get_part_id($part);
2287: if (defined($students)) {
2288: $request .= ' AND ('.
2289: join(' OR ',map {'a.student_id='.&get_student_id(split(':',$_));
2290: } @$students).
2291: ')';
2292: }
2293: my $sth = $dbh->prepare($request);
2294: $sth->execute();
2295: my $rows = $sth->fetchrow_arrayref();
2296: if ($dbh->err) {
2297: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2298: return (undef,undef);
2299: }
2300: return ($rows->[0],$rows->[1]);
2301: }
2302:
2303:
2304: ######################################################
2305: ######################################################
2306:
2307: =pod
2308:
2309: =item get_student_data
2310:
2311: =cut
2312:
2313: ######################################################
2314: ######################################################
1.105 matthew 2315: sub get_student_data {
2316: my ($students,$courseid) = @_;
2317: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2318: &setup_table_names($courseid);
2319: my $dbh = &Apache::lonmysql::get_dbh();
2320: return undef if (! defined($dbh));
2321: my $request = 'SELECT '.
2322: 'student_id, student '.
2323: 'FROM '.$student_table;
2324: if (defined($students)) {
2325: $request .= ' WHERE ('.
2326: join(' OR ', map {'student_id='.
2327: &get_student_id($_->{'username'},
2328: $_->{'domain'})
2329: } @$students
2330: ).')';
2331: }
2332: $request.= ' ORDER BY student_id';
2333: my $sth = $dbh->prepare($request);
2334: $sth->execute();
2335: if ($dbh->err) {
2336: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2337: return undef;
2338: }
2339: my $dataset = $sth->fetchall_arrayref();
2340: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2341: return $dataset;
2342: }
2343: }
2344:
1.108 matthew 2345: sub RD_student_id { return 0; }
2346: sub RD_awarddetail { return 1; }
2347: sub RD_response_eval { return 2; }
2348: sub RD_submission { return 3; }
2349: sub RD_timestamp { return 4; }
2350: sub RD_tries { return 5; }
2351: sub RD_sname { return 6; }
2352:
2353: sub get_response_data {
1.126 matthew 2354: my ($Sections,$enrollment,$symb,$response,$courseid) = @_;
1.103 matthew 2355: return undef if (! defined($symb) ||
1.100 matthew 2356: ! defined($response));
2357: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2358: #
2359: &setup_table_names($courseid);
2360: my $symb_id = &get_symb_id($symb);
2361: my $response_id = &get_part_id($response);
2362: #
2363: my $dbh = &Apache::lonmysql::get_dbh();
2364: return undef if (! defined($dbh));
1.126 matthew 2365: #
1.127 matthew 2366: my ($student_requirements,$enrollment_requirements) =
2367: &limit_by_section_and_status($Sections,$enrollment,'d');
1.100 matthew 2368: my $request = 'SELECT '.
1.105 matthew 2369: 'a.student_id, a.awarddetail, a.response_specific_value, '.
1.108 matthew 2370: 'a.submission, b.timestamp, c.tries, d.student '.
1.100 matthew 2371: 'FROM '.$fulldump_response_table.' AS a '.
2372: 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2373: 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2374: 'a.transaction = b.transaction '.
2375: 'LEFT JOIN '.$fulldump_part_table.' AS c '.
2376: 'ON a.symb_id=c.symb_id AND a.student_id=c.student_id AND '.
2377: 'a.part_id=c.part_id AND a.transaction = c.transaction '.
1.108 matthew 2378: 'LEFT JOIN '.$student_table.' AS d '.
2379: 'ON a.student_id=d.student_id '.
1.100 matthew 2380: 'WHERE '.
2381: 'a.symb_id='.$symb_id.' AND a.response_id='.$response_id;
1.126 matthew 2382: if (defined($student_requirements) || defined($enrollment_requirements)) {
2383: $request .= ' AND ';
2384: if (defined($student_requirements)) {
2385: $request .= $student_requirements.' AND ';
2386: }
2387: if (defined($enrollment_requirements)) {
2388: $request .= $enrollment_requirements.' AND ';
2389: }
2390: $request =~ s/( AND )$//;
1.100 matthew 2391: }
2392: $request .= ' ORDER BY b.timestamp';
1.103 matthew 2393: # &Apache::lonnet::logthis("request =\n".$request);
1.100 matthew 2394: my $sth = $dbh->prepare($request);
2395: $sth->execute();
1.105 matthew 2396: if ($dbh->err) {
2397: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2398: return undef;
2399: }
1.100 matthew 2400: my $dataset = $sth->fetchall_arrayref();
2401: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
1.117 matthew 2402: # Clear the \'s from around the submission
2403: for (my $i =0;$i<scalar(@$dataset);$i++) {
2404: $dataset->[$i]->[3] =~ s/(\'$|^\')//g;
2405: }
1.103 matthew 2406: return $dataset;
1.100 matthew 2407: }
1.118 matthew 2408: }
2409:
2410:
2411: sub RDs_awarddetail { return 3; }
2412: sub RDs_submission { return 2; }
2413: sub RDs_timestamp { return 1; }
2414: sub RDs_tries { return 0; }
1.119 matthew 2415: sub RDs_awarded { return 4; }
1.118 matthew 2416:
2417: sub get_response_data_by_student {
2418: my ($student,$symb,$response,$courseid) = @_;
2419: return undef if (! defined($symb) ||
2420: ! defined($response));
2421: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2422: #
2423: &setup_table_names($courseid);
2424: my $symb_id = &get_symb_id($symb);
2425: my $response_id = &get_part_id($response);
2426: #
2427: my $student_id = &get_student_id($student->{'username'},
2428: $student->{'domain'});
2429: #
2430: my $dbh = &Apache::lonmysql::get_dbh();
2431: return undef if (! defined($dbh));
2432: my $request = 'SELECT '.
1.119 matthew 2433: 'c.tries, b.timestamp, a.submission, a.awarddetail, e.awarded '.
1.118 matthew 2434: 'FROM '.$fulldump_response_table.' AS a '.
2435: 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2436: 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2437: 'a.transaction = b.transaction '.
2438: 'LEFT JOIN '.$fulldump_part_table.' AS c '.
2439: 'ON a.symb_id=c.symb_id AND a.student_id=c.student_id AND '.
2440: 'a.part_id=c.part_id AND a.transaction = c.transaction '.
2441: 'LEFT JOIN '.$student_table.' AS d '.
2442: 'ON a.student_id=d.student_id '.
1.119 matthew 2443: 'LEFT JOIN '.$performance_table.' AS e '.
2444: 'ON a.symb_id=e.symb_id AND a.part_id=e.part_id AND '.
2445: 'a.student_id=e.student_id AND c.tries=e.tries '.
1.118 matthew 2446: 'WHERE '.
2447: 'a.symb_id='.$symb_id.' AND a.response_id='.$response_id.
2448: ' AND a.student_id='.$student_id.' ORDER BY b.timestamp';
1.125 matthew 2449: # &Apache::lonnet::logthis("request =\n".$request);
1.118 matthew 2450: my $sth = $dbh->prepare($request);
2451: $sth->execute();
2452: if ($dbh->err) {
2453: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2454: return undef;
2455: }
2456: my $dataset = $sth->fetchall_arrayref();
2457: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2458: # Clear the \'s from around the submission
2459: for (my $i =0;$i<scalar(@$dataset);$i++) {
2460: $dataset->[$i]->[2] =~ s/(\'$|^\')//g;
2461: }
2462: return $dataset;
2463: }
2464: return undef; # error occurred
1.106 matthew 2465: }
1.108 matthew 2466:
2467: sub RT_student_id { return 0; }
2468: sub RT_awarded { return 1; }
2469: sub RT_tries { return 2; }
2470: sub RT_timestamp { return 3; }
1.106 matthew 2471:
2472: sub get_response_time_data {
1.107 matthew 2473: my ($students,$symb,$part,$courseid) = @_;
1.106 matthew 2474: return undef if (! defined($symb) ||
1.107 matthew 2475: ! defined($part));
1.106 matthew 2476: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2477: #
2478: &setup_table_names($courseid);
2479: my $symb_id = &get_symb_id($symb);
1.107 matthew 2480: my $part_id = &get_part_id($part);
1.106 matthew 2481: #
2482: my $dbh = &Apache::lonmysql::get_dbh();
2483: return undef if (! defined($dbh));
2484: my $request = 'SELECT '.
1.107 matthew 2485: 'a.student_id, a.awarded, a.tries, b.timestamp '.
2486: 'FROM '.$fulldump_part_table.' AS a '.
1.106 matthew 2487: 'NATURAL LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2488: # 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2489: # 'a.transaction = b.transaction '.
2490: 'WHERE '.
1.107 matthew 2491: 'a.symb_id='.$symb_id.' AND a.part_id='.$part_id;
1.106 matthew 2492: if (defined($students)) {
2493: $request .= ' AND ('.
2494: join(' OR ', map {'a.student_id='.
2495: &get_student_id($_->{'username'},
2496: $_->{'domain'})
2497: } @$students
2498: ).')';
2499: }
2500: $request .= ' ORDER BY b.timestamp';
2501: # &Apache::lonnet::logthis("request =\n".$request);
2502: my $sth = $dbh->prepare($request);
2503: $sth->execute();
2504: if ($dbh->err) {
2505: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2506: return undef;
2507: }
2508: my $dataset = $sth->fetchall_arrayref();
2509: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2510: return $dataset;
2511: }
2512:
1.100 matthew 2513: }
1.61 matthew 2514:
2515: ################################################
2516: ################################################
2517:
2518: =pod
2519:
1.116 matthew 2520: =item &get_student_scores($Sections,$Symbs,$enrollment,$courseid)
1.113 matthew 2521:
2522: =cut
2523:
2524: ################################################
2525: ################################################
2526: sub get_student_scores {
1.121 matthew 2527: my ($Sections,$Symbs,$enrollment,$courseid,$starttime,$endtime) = @_;
1.113 matthew 2528: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2529: &setup_table_names($courseid);
2530: my $dbh = &Apache::lonmysql::get_dbh();
2531: return (undef) if (! defined($dbh));
2532: my $tmptable = $courseid.'_temp_'.time;
1.114 matthew 2533: #
2534: my $symb_requirements;
1.113 matthew 2535: if (defined($Symbs) && @$Symbs) {
2536: $symb_requirements = '('.
1.114 matthew 2537: join(' OR ', map{ "(a.symb_id='".&get_symb_id($_->{'symb'}).
1.121 matthew 2538: "' AND a.part_id='".&get_part_id($_->{'part'}).
2539: "')"
1.113 matthew 2540: } @$Symbs).')';
2541: }
1.114 matthew 2542: #
2543: my $student_requirements;
2544: if ( (defined($Sections) && $Sections->[0] ne 'all')) {
1.113 matthew 2545: $student_requirements = '('.
1.114 matthew 2546: join(' OR ', map { "b.section='".$_."'" } @$Sections
1.113 matthew 2547: ).')';
2548: }
1.114 matthew 2549: #
2550: my $enrollment_requirements=undef;
2551: if (defined($enrollment) && $enrollment ne 'Any') {
2552: $enrollment_requirements = "b.status='".$enrollment."'";
2553: }
1.121 matthew 2554: #
2555: my $time_requirements = undef;
2556: if (defined($starttime)) {
2557: $time_requirements .= "a.timestamp>='".$starttime."'";
2558: if (defined($endtime)) {
2559: $time_requirements .= " AND a.timestamp<='".$endtime."'";
2560: }
2561: } elsif (defined($endtime)) {
2562: $time_requirements .= "a.timestamp<='".$endtime."'";
2563: }
1.114 matthew 2564: ##
2565: ##
1.113 matthew 2566: my $request = 'CREATE TEMPORARY TABLE IF NOT EXISTS '.$tmptable.
1.114 matthew 2567: ' SELECT a.student_id,SUM(a.awarded) AS score FROM '.
2568: $performance_table.' AS a ';
2569: if (defined($student_requirements) || defined($enrollment_requirements)) {
2570: $request .= ' NATURAL LEFT JOIN '.$student_table.' AS b ';
2571: }
2572: if (defined($symb_requirements) ||
2573: defined($student_requirements) ||
2574: defined($enrollment_requirements) ) {
1.113 matthew 2575: $request .= ' WHERE ';
2576: }
1.114 matthew 2577: if (defined($symb_requirements)) {
2578: $request .= $symb_requirements.' AND ';
2579: }
2580: if (defined($student_requirements)) {
2581: $request .= $student_requirements.' AND ';
2582: }
2583: if (defined($enrollment_requirements)) {
2584: $request .= $enrollment_requirements.' AND ';
2585: }
1.121 matthew 2586: if (defined($time_requirements)) {
2587: $request .= $time_requirements.' AND ';
2588: }
2589: $request =~ s/ AND $//; # Strip of the trailing ' AND '.
1.114 matthew 2590: $request .= ' GROUP BY a.student_id';
2591: # &Apache::lonnet::logthis("request = \n".$request);
1.113 matthew 2592: my $sth = $dbh->prepare($request);
2593: $sth->execute();
2594: if ($dbh->err) {
2595: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2596: return undef;
2597: }
2598: $request = 'SELECT score,COUNT(*) FROM '.$tmptable.' GROUP BY score';
2599: # &Apache::lonnet::logthis("request = \n".$request);
2600: $sth = $dbh->prepare($request);
2601: $sth->execute();
2602: if ($dbh->err) {
2603: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2604: return undef;
2605: }
2606: my $dataset = $sth->fetchall_arrayref();
2607: return $dataset;
2608: }
2609:
2610: ################################################
2611: ################################################
2612:
2613: =pod
2614:
1.61 matthew 2615: =item &setup_table_names()
2616:
2617: input: course id
2618:
2619: output: none
2620:
2621: Cleans up the package variables for local caching.
2622:
2623: =cut
2624:
2625: ################################################
2626: ################################################
2627: sub setup_table_names {
2628: my ($courseid) = @_;
2629: if (! defined($courseid)) {
2630: $courseid = $ENV{'request.course.id'};
2631: }
2632: #
2633: if (! defined($current_course) || $current_course ne $courseid) {
2634: # Clear out variables
2635: $have_read_part_table = 0;
2636: undef(%ids_by_part);
2637: undef(%parts_by_id);
2638: $have_read_symb_table = 0;
2639: undef(%ids_by_symb);
2640: undef(%symbs_by_id);
2641: $have_read_student_table = 0;
2642: undef(%ids_by_student);
2643: undef(%students_by_id);
2644: #
2645: $current_course = $courseid;
2646: }
2647: #
2648: # Set up database names
2649: my $base_id = $courseid;
2650: $symb_table = $base_id.'_'.'symb';
2651: $part_table = $base_id.'_'.'part';
2652: $student_table = $base_id.'_'.'student';
2653: $performance_table = $base_id.'_'.'performance';
2654: $parameters_table = $base_id.'_'.'parameters';
1.89 matthew 2655: $fulldump_part_table = $base_id.'_'.'partdata';
2656: $fulldump_response_table = $base_id.'_'.'responsedata';
2657: $fulldump_timestamp_table = $base_id.'_'.'timestampdata';
1.127 matthew 2658: $weight_table = $base_id.'_'.'weight';
1.89 matthew 2659: #
2660: @Tables = (
2661: $symb_table,
2662: $part_table,
2663: $student_table,
2664: $performance_table,
2665: $parameters_table,
2666: $fulldump_part_table,
2667: $fulldump_response_table,
2668: $fulldump_timestamp_table,
1.127 matthew 2669: $weight_table,
1.89 matthew 2670: );
1.61 matthew 2671: return;
1.3 stredwic 2672: }
1.1 stredwic 2673:
1.35 matthew 2674: ################################################
2675: ################################################
2676:
2677: =pod
2678:
1.57 matthew 2679: =back
2680:
2681: =item End of Local Data Caching Subroutines
2682:
2683: =cut
2684:
2685: ################################################
2686: ################################################
2687:
1.89 matthew 2688: } # End scope of table identifiers
1.57 matthew 2689:
2690: ################################################
2691: ################################################
2692:
2693: =pod
2694:
2695: =head3 Classlist Subroutines
2696:
1.35 matthew 2697: =item &get_classlist();
2698:
2699: Retrieve the classist of a given class or of the current class. Student
2700: information is returned from the classlist.db file and, if needed,
2701: from the students environment.
2702:
2703: Optional arguments are $cid, $cdom, and $cnum (course id, course domain,
2704: and course number, respectively). Any omitted arguments will be taken
2705: from the current environment ($ENV{'request.course.id'},
2706: $ENV{'course.'.$cid.'.domain'}, and $ENV{'course.'.$cid.'.num'}).
2707:
2708: Returns a reference to a hash which contains:
2709: keys '$sname:$sdom'
1.111 raeburn 2710: values [$sdom,$sname,$end,$start,$id,$section,$fullname,$status,$type]
1.54 bowersj2 2711:
2712: The constant values CL_SDOM, CL_SNAME, CL_END, etc. can be used
2713: as indices into the returned list to future-proof clients against
2714: changes in the list order.
1.35 matthew 2715:
2716: =cut
2717:
2718: ################################################
2719: ################################################
1.54 bowersj2 2720:
2721: sub CL_SDOM { return 0; }
2722: sub CL_SNAME { return 1; }
2723: sub CL_END { return 2; }
2724: sub CL_START { return 3; }
2725: sub CL_ID { return 4; }
2726: sub CL_SECTION { return 5; }
2727: sub CL_FULLNAME { return 6; }
2728: sub CL_STATUS { return 7; }
1.111 raeburn 2729: sub CL_TYPE { return 8; }
1.35 matthew 2730:
2731: sub get_classlist {
2732: my ($cid,$cdom,$cnum) = @_;
2733: $cid = $cid || $ENV{'request.course.id'};
2734: $cdom = $cdom || $ENV{'course.'.$cid.'.domain'};
2735: $cnum = $cnum || $ENV{'course.'.$cid.'.num'};
1.57 matthew 2736: my $now = time;
1.35 matthew 2737: #
2738: my %classlist=&Apache::lonnet::dump('classlist',$cdom,$cnum);
2739: while (my ($student,$info) = each(%classlist)) {
1.60 matthew 2740: if ($student =~ /^(con_lost|error|no_such_host)/i) {
2741: &Apache::lonnet::logthis('get_classlist error for '.$cid.':'.$student);
2742: return undef;
2743: }
1.35 matthew 2744: my ($sname,$sdom) = split(/:/,$student);
2745: my @Values = split(/:/,$info);
1.111 raeburn 2746: my ($end,$start,$id,$section,$fullname,$type);
1.35 matthew 2747: if (@Values > 2) {
1.111 raeburn 2748: ($end,$start,$id,$section,$fullname,$type) = @Values;
1.35 matthew 2749: } else { # We have to get the data ourselves
2750: ($end,$start) = @Values;
1.37 matthew 2751: $section = &Apache::lonnet::getsection($sdom,$sname,$cid);
1.35 matthew 2752: my %info=&Apache::lonnet::get('environment',
2753: ['firstname','middlename',
2754: 'lastname','generation','id'],
2755: $sdom, $sname);
2756: my ($tmp) = keys(%info);
2757: if ($tmp =~/^(con_lost|error|no_such_host)/i) {
2758: $fullname = 'not available';
2759: $id = 'not available';
1.38 matthew 2760: &Apache::lonnet::logthis('unable to retrieve environment '.
2761: 'for '.$sname.':'.$sdom);
1.35 matthew 2762: } else {
2763: $fullname = &ProcessFullName(@info{qw/lastname generation
2764: firstname middlename/});
2765: $id = $info{'id'};
2766: }
1.36 matthew 2767: # Update the classlist with this students information
2768: if ($fullname ne 'not available') {
2769: my $enrolldata = join(':',$end,$start,$id,$section,$fullname);
2770: my $reply=&Apache::lonnet::cput('classlist',
2771: {$student => $enrolldata},
2772: $cdom,$cnum);
2773: if ($reply !~ /^(ok|delayed)/) {
2774: &Apache::lonnet::logthis('Unable to update classlist for '.
2775: 'student '.$sname.':'.$sdom.
2776: ' error:'.$reply);
2777: }
2778: }
1.35 matthew 2779: }
2780: my $status='Expired';
2781: if(((!$end) || $now < $end) && ((!$start) || ($now > $start))) {
2782: $status='Active';
2783: }
2784: $classlist{$student} =
1.111 raeburn 2785: [$sdom,$sname,$end,$start,$id,$section,$fullname,$status,$type];
1.35 matthew 2786: }
2787: if (wantarray()) {
2788: return (\%classlist,['domain','username','end','start','id',
1.111 raeburn 2789: 'section','fullname','status','type']);
1.35 matthew 2790: } else {
2791: return \%classlist;
2792: }
2793: }
2794:
1.1 stredwic 2795: # ----- END HELPER FUNCTIONS --------------------------------------------
2796:
2797: 1;
2798: __END__
1.36 matthew 2799:
1.35 matthew 2800:
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