Annotation of loncom/interface/loncoursedata.pm, revision 1.101
1.1 stredwic 1: # The LearningOnline Network with CAPA
2: #
1.101 ! matthew 3: # $Id: loncoursedata.pm,v 1.100 2003/10/02 20:48:57 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: AT THIS TIME THE USE OF THIS FUNCTION IS *NOT* RECOMMENDED
77:
78: Use lonnavmaps to build a data structure describing the order and
79: assessment contents of each sequence in the current course.
80:
81: The returned structure is a hash reference.
82:
1.61 matthew 83: { title => 'title',
84: symb => 'symb',
85: src => '/s/o/u/r/c/e',
1.45 matthew 86: type => (container|assessment),
1.50 matthew 87: num_assess => 2, # only for container
1.45 matthew 88: parts => [11,13,15], # only for assessment
1.50 matthew 89: response_ids => [12,14,16], # only for assessment
90: contents => [........] # only for container
1.45 matthew 91: }
92:
1.50 matthew 93: $hash->{'contents'} is a reference to an array of hashes of the same structure.
94:
95: Also returned are array references to the sequences and assessments contained
96: in the course.
1.49 matthew 97:
1.45 matthew 98:
99: =cut
100:
1.50 matthew 101: ####################################################
102: ####################################################
1.45 matthew 103: sub get_sequence_assessment_data {
104: my $fn=$ENV{'request.course.fn'};
105: ##
106: ## use navmaps
1.83 bowersj2 107: my $navmap = Apache::lonnavmaps::navmap->new();
1.45 matthew 108: if (!defined($navmap)) {
109: return 'Can not open Coursemap';
110: }
1.75 matthew 111: # We explicity grab the top level map because I am not sure we
112: # are pulling it from the iterator.
113: my $top_level_map = $navmap->getById('0.0');
114: #
1.45 matthew 115: my $iterator = $navmap->getIterator(undef, undef, undef, 1);
1.61 matthew 116: my $curRes = $iterator->next(); # Top level sequence
1.45 matthew 117: ##
118: ## Prime the pump
119: ##
120: ## We are going to loop until we run out of sequences/pages to explore for
121: ## resources. This means we have to start out with something to look
122: ## at.
1.76 matthew 123: my $title = $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1.75 matthew 124: my $symb = $top_level_map->symb();
125: my $src = $top_level_map->src();
126: my $randompick = $top_level_map->randompick();
1.45 matthew 127: #
1.49 matthew 128: my @Sequences;
129: my @Assessments;
1.45 matthew 130: my @Nested_Sequences = (); # Stack of sequences, keeps track of depth
131: my $top = { title => $title,
1.52 matthew 132: src => $src,
1.45 matthew 133: symb => $symb,
134: type => 'container',
135: num_assess => 0,
1.53 matthew 136: num_assess_parts => 0,
1.75 matthew 137: contents => [],
138: randompick => $randompick,
139: };
1.49 matthew 140: push (@Sequences,$top);
1.45 matthew 141: push (@Nested_Sequences, $top);
142: #
143: # We need to keep track of which sequences contain homework problems
144: #
1.78 matthew 145: my $previous_too;
1.52 matthew 146: my $previous;
1.45 matthew 147: while (scalar(@Nested_Sequences)) {
1.78 matthew 148: $previous_too = $previous;
1.50 matthew 149: $previous = $curRes;
1.45 matthew 150: $curRes = $iterator->next();
151: my $currentmap = $Nested_Sequences[-1]; # Last one on the stack
152: if ($curRes == $iterator->BEGIN_MAP()) {
1.78 matthew 153: if (! ref($previous)) {
154: $previous = $previous_too;
155: }
156: if (! ref($previous)) {
157: next;
158: }
1.45 matthew 159: # get the map itself, instead of BEGIN_MAP
1.51 matthew 160: $title = $previous->title();
1.84 matthew 161: $title =~ s/\:/\&\#058;/g;
1.51 matthew 162: $symb = $previous->symb();
163: $src = $previous->src();
1.81 matthew 164: # pick up the filename if there is no title available
165: if (! defined($title) || $title eq '') {
166: ($title) = ($src=~/\/([^\/]*)$/);
167: }
1.75 matthew 168: $randompick = $previous->randompick();
1.45 matthew 169: my $newmap = { title => $title,
170: src => $src,
171: symb => $symb,
172: type => 'container',
173: num_assess => 0,
1.75 matthew 174: randompick => $randompick,
1.45 matthew 175: contents => [],
176: };
177: push (@{$currentmap->{'contents'}},$newmap); # this is permanent
1.49 matthew 178: push (@Sequences,$newmap);
1.45 matthew 179: push (@Nested_Sequences, $newmap); # this is a stack
180: next;
181: }
182: if ($curRes == $iterator->END_MAP()) {
183: pop(@Nested_Sequences);
184: next;
185: }
186: next if (! ref($curRes));
1.50 matthew 187: next if (! $curRes->is_problem());# && !$curRes->randomout);
1.45 matthew 188: # Okay, from here on out we only deal with assessments
189: $title = $curRes->title();
1.84 matthew 190: $title =~ s/\:/\&\#058;/g;
1.45 matthew 191: $symb = $curRes->symb();
192: $src = $curRes->src();
193: my $parts = $curRes->parts();
1.87 matthew 194: my %partdata;
195: foreach my $part (@$parts) {
1.88 matthew 196: my @Responses = $curRes->responseType($part);
197: my @Ids = $curRes->responseIds($part);
198: $partdata{$part}->{'ResponseTypes'}= \@Responses;
199: $partdata{$part}->{'ResponseIds'} = \@Ids;
1.91 matthew 200: # Count how many responses of each type there are in this part
201: foreach (@Responses) {
202: $partdata{$part}->{$_}++;
203: }
1.87 matthew 204: }
1.45 matthew 205: my $assessment = { title => $title,
206: src => $src,
207: symb => $symb,
208: type => 'assessment',
1.53 matthew 209: parts => $parts,
210: num_parts => scalar(@$parts),
1.87 matthew 211: partdata => \%partdata,
1.45 matthew 212: };
1.49 matthew 213: push(@Assessments,$assessment);
1.45 matthew 214: push(@{$currentmap->{'contents'}},$assessment);
215: $currentmap->{'num_assess'}++;
1.53 matthew 216: $currentmap->{'num_assess_parts'}+= scalar(@$parts);
1.45 matthew 217: }
1.58 matthew 218: $navmap->untieHashes();
1.49 matthew 219: return ($top,\@Sequences,\@Assessments);
1.45 matthew 220: }
1.50 matthew 221:
1.4 stredwic 222: sub LoadDiscussion {
1.13 stredwic 223: my ($courseID)=@_;
1.5 minaeibi 224: my %Discuss=();
225: my %contrib=&Apache::lonnet::dump(
226: $courseID,
227: $ENV{'course.'.$courseID.'.domain'},
228: $ENV{'course.'.$courseID.'.num'});
229:
230: #my %contrib=&DownloadCourseInformation($name, $courseID, 0);
231:
1.4 stredwic 232: foreach my $temp(keys %contrib) {
233: if ($temp=~/^version/) {
234: my $ver=$contrib{$temp};
235: my ($dummy,$prb)=split(':',$temp);
236: for (my $idx=1; $idx<=$ver; $idx++ ) {
237: my $name=$contrib{"$idx:$prb:sendername"};
1.5 minaeibi 238: $Discuss{"$name:$prb"}=$idx;
1.4 stredwic 239: }
240: }
241: }
1.5 minaeibi 242:
243: return \%Discuss;
1.1 stredwic 244: }
245:
1.71 matthew 246: ################################################
247: ################################################
248:
249: =pod
250:
251: =item &GetUserName(username,userdomain)
252:
253: Returns a hash with the following entries:
254: 'firstname', 'middlename', 'lastname', 'generation', and 'fullname'
255:
256: 'fullname' is the result of &Apache::loncoursedata::ProcessFullName.
257:
258: =cut
259:
260: ################################################
261: ################################################
262: sub GetUserName {
263: my ($username,$userdomain) = @_;
264: $username = $ENV{'user.name'} if (! defined($username));
265: $userdomain = $ENV{'user.domain'} if (! defined($username));
266: my %userenv = &Apache::lonnet::get('environment',
267: ['firstname','middlename','lastname','generation'],
268: $userdomain,$username);
269: $userenv{'fullname'} = &ProcessFullName($userenv{'lastname'},
270: $userenv{'generation'},
271: $userenv{'firstname'},
272: $userenv{'middlename'});
273: return %userenv;
274: }
275:
276: ################################################
277: ################################################
278:
1.1 stredwic 279: =pod
280:
281: =item &ProcessFullName()
282:
283: Takes lastname, generation, firstname, and middlename (or some partial
284: set of this data) and returns the full name version as a string. Format
285: is Lastname generation, firstname middlename or a subset of this.
286:
287: =cut
288:
1.71 matthew 289: ################################################
290: ################################################
1.1 stredwic 291: sub ProcessFullName {
292: my ($lastname, $generation, $firstname, $middlename)=@_;
293: my $Str = '';
294:
1.34 matthew 295: # Strip whitespace preceeding & following name components.
296: $lastname =~ s/(\s+$|^\s+)//g;
297: $generation =~ s/(\s+$|^\s+)//g;
298: $firstname =~ s/(\s+$|^\s+)//g;
299: $middlename =~ s/(\s+$|^\s+)//g;
300:
1.1 stredwic 301: if($lastname ne '') {
1.34 matthew 302: $Str .= $lastname;
303: $Str .= ' '.$generation if ($generation ne '');
304: $Str .= ',';
305: $Str .= ' '.$firstname if ($firstname ne '');
306: $Str .= ' '.$middlename if ($middlename ne '');
1.1 stredwic 307: } else {
1.34 matthew 308: $Str .= $firstname if ($firstname ne '');
309: $Str .= ' '.$middlename if ($middlename ne '');
310: $Str .= ' '.$generation if ($generation ne '');
1.1 stredwic 311: }
312:
313: return $Str;
314: }
315:
1.46 matthew 316: ################################################
317: ################################################
318:
319: =pod
320:
1.47 matthew 321: =item &make_into_hash($values);
322:
323: Returns a reference to a hash as described by $values. $values is
324: assumed to be the result of
1.57 matthew 325: join(':',map {&Apache::lonnet::escape($_)} %orighash);
1.47 matthew 326:
327: This is a helper function for get_current_state.
328:
329: =cut
330:
331: ################################################
332: ################################################
333: sub make_into_hash {
334: my $values = shift;
335: my %tmp = map { &Apache::lonnet::unescape($_); }
336: split(':',$values);
337: return \%tmp;
338: }
339:
340:
341: ################################################
342: ################################################
343:
344: =pod
345:
1.57 matthew 346: =head1 LOCAL DATA CACHING SUBROUTINES
347:
348: The local caching is done using MySQL. There is no fall-back implementation
349: if MySQL is not running.
350:
351: The programmers interface is to call &get_current_state() or some other
352: primary interface subroutine (described below). The internals of this
353: storage system are documented here.
354:
355: There are six tables used to store student performance data (the results of
356: a dumpcurrent). Each of these tables is created in MySQL with a name of
357: $courseid_*****, where ***** is 'symb', 'part', or whatever is appropriate
358: for the table. The tables and their purposes are described below.
359:
360: Some notes before we get started.
361:
362: Each table must have a PRIMARY KEY, which is a column or set of columns which
363: will serve to uniquely identify a row of data. NULL is not allowed!
364:
365: INDEXes work best on integer data.
366:
367: JOIN is used to combine data from many tables into one output.
368:
369: lonmysql.pm is used for some of the interface, specifically the table creation
370: calls. The inserts are done in bulk by directly calling the database handler.
371: The SELECT ... JOIN statement used to retrieve the data does not have an
372: interface in lonmysql.pm and I shudder at the thought of writing one.
373:
374: =head3 Table Descriptions
375:
376: =over 4
377:
1.89 matthew 378: =item Tables used to store meta information
379:
380: The following tables hold data required to keep track of the current status
381: of a students data in the tables or to look up the students data in the tables.
382:
383: =over 4
384:
1.57 matthew 385: =item $symb_table
386:
387: The symb_table has two columns. The first is a 'symb_id' and the second
388: is the text name for the 'symb' (limited to 64k). The 'symb_id' is generated
389: automatically by MySQL so inserts should be done on this table with an
390: empty first element. This table has its PRIMARY KEY on the 'symb_id'.
391:
392: =item $part_table
393:
394: The part_table has two columns. The first is a 'part_id' and the second
395: is the text name for the 'part' (limited to 100 characters). The 'part_id' is
396: generated automatically by MySQL so inserts should be done on this table with
397: an empty first element. This table has its PRIMARY KEY on the 'part' (100
398: characters) and a KEY on 'part_id'.
399:
400: =item $student_table
401:
402: The student_table has two columns. The first is a 'student_id' and the second
403: is the text description of the 'student' (typically username:domain) (less
404: than 100 characters). The 'student_id' is automatically generated by MySQL.
405: The use of the name 'student_id' is loaded, I know, but this ID is used ONLY
406: internally to the MySQL database and is not the same as the students ID
407: (stored in the students environment). This table has its PRIMARY KEY on the
408: 'student' (100 characters).
409:
1.87 matthew 410: =item $studentdata_table
1.57 matthew 411:
1.89 matthew 412: The studentdata_table has four columns: 'student_id' (the unique id of
413: the student), 'updatetime' (the time the students data was last updated),
414: 'fullupdatetime' (the time the students full data was last updated),
415: 'section', and 'classification'( the students current classification).
416: This table has its PRIMARY KEY on 'student_id'.
417:
418: =back
419:
420: =item Tables used to store current status data
421:
422: The following tables store data only about the students current status on
423: a problem, meaning only the data related to the last attempt on a problem.
424:
425: =over 4
1.57 matthew 426:
427: =item $performance_table
428:
429: The performance_table has 9 columns. The first three are 'symb_id',
430: 'student_id', and 'part_id'. These comprise the PRIMARY KEY for this table
431: and are directly related to the $symb_table, $student_table, and $part_table
432: described above. MySQL does better indexing on numeric items than text,
433: so we use these three "index tables". The remaining columns are
434: 'solved', 'tries', 'awarded', 'award', 'awarddetail', and 'timestamp'.
435: These are either the MySQL type TINYTEXT or various integers ('tries' and
436: 'timestamp'). This table has KEYs of 'student_id' and 'symb_id'.
437: For use of this table, see the functions described below.
438:
439: =item $parameters_table
440:
441: The parameters_table holds the data that does not fit neatly into the
442: performance_table. The parameters table has four columns: 'symb_id',
443: 'student_id', 'parameter', and 'value'. 'symb_id', 'student_id', and
444: 'parameter' comprise the PRIMARY KEY for this table. 'parameter' is
445: limited to 255 characters. 'value' is limited to 64k characters.
446:
447: =back
448:
1.89 matthew 449: =item Tables used for storing historic data
450:
451: The following tables are used to store almost all of the transactions a student
452: has made on a homework problem. See loncapa/docs/homework/datastorage for
453: specific information about each of the parameters stored.
454:
455: =over 4
456:
457: =item $fulldump_response_table
458:
459: The response table holds data (documented in loncapa/docs/homework/datastorage)
460: associated with a particular response id which is stored when a student
461: attempts a problem. The following are the columns of the table, in order:
462: 'symb_id','part_id','response_id','student_id','transaction','tries',
1.93 matthew 463: 'awarddetail', 'response_specific' (data particular to the response
1.89 matthew 464: type), 'response_specific_value', and 'submission (the text of the students
465: submission). The primary key is based on the first five columns listed above.
466:
467: =item $fulldump_part_table
468:
469: The part table holds data (documented in loncapa/docs/homework/datastorage)
470: associated with a particular part id which is stored when a student attempts
471: a problem. The following are the columns of the table, in order:
472: 'symb_id','part_id','student_id','transaction','tries','award','awarded',
473: and 'previous'. The primary key is based on the first five columns listed
474: above.
475:
476: =item $fulldump_timestamp_table
477:
478: The timestamp table holds the timestamps of the transactions which are
479: stored in $fulldump_response_table and $fulldump_part_table. This data is
480: about both the response and part data. Columns: 'symb_id','student_id',
481: 'transaction', and 'timestamp'.
482: The primary key is based on the first 3 columns.
483:
484: =back
485:
486: =back
487:
1.57 matthew 488: =head3 Important Subroutines
489:
490: Here is a brief overview of the subroutines which are likely to be of
491: interest:
492:
493: =over 4
494:
495: =item &get_current_state(): programmers interface.
496:
497: =item &init_dbs(): table creation
498:
499: =item &update_student_data(): data storage calls
500:
501: =item &get_student_data_from_performance_cache(): data retrieval
502:
503: =back
504:
505: =head3 Main Documentation
506:
507: =over 4
508:
509: =cut
510:
511: ################################################
512: ################################################
513:
514: ################################################
515: ################################################
1.89 matthew 516: { # Begin scope of table identifiers
1.57 matthew 517:
518: my $current_course ='';
519: my $symb_table;
520: my $part_table;
521: my $student_table;
1.87 matthew 522: my $studentdata_table;
1.57 matthew 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;
1.57 matthew 528:
1.89 matthew 529: my @Tables;
1.57 matthew 530: ################################################
531: ################################################
532:
533: =pod
534:
535: =item &init_dbs()
536:
537: Input: course id
538:
539: Output: 0 on success, positive integer on error
540:
541: This routine issues the calls to lonmysql to create the tables used to
542: store student data.
543:
544: =cut
545:
546: ################################################
547: ################################################
548: sub init_dbs {
549: my $courseid = shift;
550: &setup_table_names($courseid);
551: #
1.73 matthew 552: # Drop any of the existing tables
1.89 matthew 553: foreach my $table (@Tables) {
1.73 matthew 554: &Apache::lonmysql::drop_table($table);
555: }
556: #
1.57 matthew 557: # Note - changes to this table must be reflected in the code that
558: # stores the data (calls &Apache::lonmysql::store_row with this table
559: # id
560: my $symb_table_def = {
561: id => $symb_table,
562: permanent => 'no',
563: columns => [{ name => 'symb_id',
564: type => 'MEDIUMINT UNSIGNED',
565: restrictions => 'NOT NULL',
566: auto_inc => 'yes', },
567: { name => 'symb',
568: type => 'MEDIUMTEXT',
569: restrictions => 'NOT NULL'},
570: ],
571: 'PRIMARY KEY' => ['symb_id'],
572: };
573: #
574: my $part_table_def = {
575: id => $part_table,
576: permanent => 'no',
577: columns => [{ name => 'part_id',
578: type => 'MEDIUMINT UNSIGNED',
579: restrictions => 'NOT NULL',
580: auto_inc => 'yes', },
581: { name => 'part',
582: type => 'VARCHAR(100)',
583: restrictions => 'NOT NULL'},
584: ],
585: 'PRIMARY KEY' => ['part (100)'],
586: 'KEY' => [{ columns => ['part_id']},],
587: };
588: #
589: my $student_table_def = {
590: id => $student_table,
591: permanent => 'no',
592: columns => [{ name => 'student_id',
593: type => 'MEDIUMINT UNSIGNED',
594: restrictions => 'NOT NULL',
595: auto_inc => 'yes', },
596: { name => 'student',
597: type => 'VARCHAR(100)',
598: restrictions => 'NOT NULL'},
1.85 matthew 599: { name => 'classification',
600: type => 'varchar(100)', },
1.57 matthew 601: ],
602: 'PRIMARY KEY' => ['student (100)'],
603: 'KEY' => [{ columns => ['student_id']},],
604: };
605: #
1.87 matthew 606: my $studentdata_table_def = {
607: id => $studentdata_table,
1.57 matthew 608: permanent => 'no',
1.87 matthew 609: columns => [{ name => 'student_id',
610: type => 'MEDIUMINT UNSIGNED',
1.57 matthew 611: restrictions => 'NOT NULL UNIQUE',},
612: { name => 'updatetime',
1.89 matthew 613: type => 'INT UNSIGNED'},
614: { name => 'fullupdatetime',
615: type => 'INT UNSIGNED'},
1.87 matthew 616: { name => 'section',
617: type => 'VARCHAR(100)'},
618: { name => 'classification',
619: type => 'VARCHAR(100)', },
1.57 matthew 620: ],
1.87 matthew 621: 'PRIMARY KEY' => ['student_id'],
1.57 matthew 622: };
623: #
624: my $performance_table_def = {
625: id => $performance_table,
626: permanent => 'no',
627: columns => [{ name => 'symb_id',
628: type => 'MEDIUMINT UNSIGNED',
629: restrictions => 'NOT NULL' },
630: { name => 'student_id',
631: type => 'MEDIUMINT UNSIGNED',
632: restrictions => 'NOT NULL' },
633: { name => 'part_id',
634: type => 'MEDIUMINT UNSIGNED',
635: restrictions => 'NOT NULL' },
1.73 matthew 636: { name => 'part',
637: type => 'VARCHAR(100)',
638: restrictions => 'NOT NULL'},
1.57 matthew 639: { name => 'solved',
640: type => 'TINYTEXT' },
641: { name => 'tries',
642: type => 'SMALLINT UNSIGNED' },
643: { name => 'awarded',
644: type => 'TINYTEXT' },
645: { name => 'award',
646: type => 'TINYTEXT' },
647: { name => 'awarddetail',
648: type => 'TINYTEXT' },
649: { name => 'timestamp',
650: type => 'INT UNSIGNED'},
651: ],
652: 'PRIMARY KEY' => ['symb_id','student_id','part_id'],
653: 'KEY' => [{ columns=>['student_id'] },
654: { columns=>['symb_id'] },],
655: };
656: #
1.89 matthew 657: my $fulldump_part_table_def = {
658: id => $fulldump_part_table,
659: permanent => 'no',
660: columns => [
661: { name => 'symb_id',
662: type => 'MEDIUMINT UNSIGNED',
663: restrictions => 'NOT NULL' },
664: { name => 'part_id',
665: type => 'MEDIUMINT UNSIGNED',
666: restrictions => 'NOT NULL' },
667: { name => 'student_id',
668: type => 'MEDIUMINT UNSIGNED',
669: restrictions => 'NOT NULL' },
670: { name => 'transaction',
671: type => 'MEDIUMINT UNSIGNED',
672: restrictions => 'NOT NULL' },
673: { name => 'tries',
674: type => 'SMALLINT UNSIGNED',
675: restrictions => 'NOT NULL' },
676: { name => 'award',
677: type => 'TINYTEXT' },
678: { name => 'awarded',
679: type => 'TINYTEXT' },
680: { name => 'previous',
681: type => 'SMALLINT UNSIGNED' },
682: # { name => 'regrader',
683: # type => 'TINYTEXT' },
684: # { name => 'afterduedate',
685: # type => 'TINYTEXT' },
686: ],
687: 'PRIMARY KEY' => ['symb_id','part_id','student_id','transaction'],
688: 'KEY' => [
689: { columns=>['symb_id'] },
690: { columns=>['part_id'] },
691: { columns=>['student_id'] },
692: ],
693: };
694: #
695: my $fulldump_response_table_def = {
696: id => $fulldump_response_table,
697: permanent => 'no',
698: columns => [
699: { name => 'symb_id',
700: type => 'MEDIUMINT UNSIGNED',
701: restrictions => 'NOT NULL' },
702: { name => 'part_id',
703: type => 'MEDIUMINT UNSIGNED',
704: restrictions => 'NOT NULL' },
705: { name => 'response_id',
706: type => 'MEDIUMINT UNSIGNED',
707: restrictions => 'NOT NULL' },
708: { name => 'student_id',
709: type => 'MEDIUMINT UNSIGNED',
710: restrictions => 'NOT NULL' },
711: { name => 'transaction',
712: type => 'MEDIUMINT UNSIGNED',
713: restrictions => 'NOT NULL' },
714: { name => 'awarddetail',
715: type => 'TINYTEXT' },
716: # { name => 'message',
717: # type => 'CHAR' },
718: { name => 'response_specific',
719: type => 'TINYTEXT' },
720: { name => 'response_specific_value',
721: type => 'TINYTEXT' },
722: { name => 'submission',
723: type => 'TEXT'},
724: ],
725: 'PRIMARY KEY' => ['symb_id','part_id','response_id','student_id',
726: 'transaction'],
727: 'KEY' => [
728: { columns=>['symb_id'] },
729: { columns=>['part_id','response_id'] },
730: { columns=>['student_id'] },
731: ],
732: };
733: my $fulldump_timestamp_table_def = {
734: id => $fulldump_timestamp_table,
735: permanent => 'no',
736: columns => [
737: { name => 'symb_id',
738: type => 'MEDIUMINT UNSIGNED',
739: restrictions => 'NOT NULL' },
740: { name => 'student_id',
741: type => 'MEDIUMINT UNSIGNED',
742: restrictions => 'NOT NULL' },
743: { name => 'transaction',
744: type => 'MEDIUMINT UNSIGNED',
745: restrictions => 'NOT NULL' },
746: { name => 'timestamp',
747: type => 'INT UNSIGNED'},
748: ],
749: 'PRIMARY KEY' => ['symb_id','student_id','transaction'],
750: 'KEY' => [
751: { columns=>['symb_id'] },
752: { columns=>['student_id'] },
753: { columns=>['transaction'] },
754: ],
755: };
756:
757: #
1.57 matthew 758: my $parameters_table_def = {
759: id => $parameters_table,
760: permanent => 'no',
761: columns => [{ name => 'symb_id',
762: type => 'MEDIUMINT UNSIGNED',
763: restrictions => 'NOT NULL' },
764: { name => 'student_id',
765: type => 'MEDIUMINT UNSIGNED',
766: restrictions => 'NOT NULL' },
767: { name => 'parameter',
768: type => 'TINYTEXT',
769: restrictions => 'NOT NULL' },
770: { name => 'value',
771: type => 'MEDIUMTEXT' },
772: ],
773: 'PRIMARY KEY' => ['symb_id','student_id','parameter (255)'],
774: };
775: #
776: # Create the tables
777: my $tableid;
778: $tableid = &Apache::lonmysql::create_table($symb_table_def);
779: if (! defined($tableid)) {
780: &Apache::lonnet::logthis("error creating symb_table: ".
781: &Apache::lonmysql::get_error());
782: return 1;
783: }
784: #
785: $tableid = &Apache::lonmysql::create_table($part_table_def);
786: if (! defined($tableid)) {
787: &Apache::lonnet::logthis("error creating part_table: ".
788: &Apache::lonmysql::get_error());
789: return 2;
790: }
791: #
792: $tableid = &Apache::lonmysql::create_table($student_table_def);
793: if (! defined($tableid)) {
794: &Apache::lonnet::logthis("error creating student_table: ".
795: &Apache::lonmysql::get_error());
796: return 3;
797: }
798: #
1.87 matthew 799: $tableid = &Apache::lonmysql::create_table($studentdata_table_def);
1.57 matthew 800: if (! defined($tableid)) {
1.87 matthew 801: &Apache::lonnet::logthis("error creating studentdata_table: ".
1.57 matthew 802: &Apache::lonmysql::get_error());
803: return 4;
804: }
805: #
806: $tableid = &Apache::lonmysql::create_table($performance_table_def);
807: if (! defined($tableid)) {
808: &Apache::lonnet::logthis("error creating preformance_table: ".
809: &Apache::lonmysql::get_error());
810: return 5;
811: }
812: #
813: $tableid = &Apache::lonmysql::create_table($parameters_table_def);
814: if (! defined($tableid)) {
815: &Apache::lonnet::logthis("error creating parameters_table: ".
816: &Apache::lonmysql::get_error());
817: return 6;
818: }
1.89 matthew 819: #
820: $tableid = &Apache::lonmysql::create_table($fulldump_part_table_def);
821: if (! defined($tableid)) {
822: &Apache::lonnet::logthis("error creating fulldump_part_table: ".
823: &Apache::lonmysql::get_error());
824: return 7;
825: }
826: #
827: $tableid = &Apache::lonmysql::create_table($fulldump_response_table_def);
828: if (! defined($tableid)) {
829: &Apache::lonnet::logthis("error creating fulldump_response_table: ".
830: &Apache::lonmysql::get_error());
831: return 8;
832: }
833: $tableid = &Apache::lonmysql::create_table($fulldump_timestamp_table_def);
834: if (! defined($tableid)) {
835: &Apache::lonnet::logthis("error creating fulldump_timestamp_table: ".
836: &Apache::lonmysql::get_error());
837: return 9;
838: }
1.57 matthew 839: return 0;
1.70 matthew 840: }
841:
842: ################################################
843: ################################################
844:
845: =pod
846:
847: =item &delete_caches()
848:
849: =cut
850:
851: ################################################
852: ################################################
853: sub delete_caches {
854: my $courseid = shift;
855: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
856: #
857: &setup_table_names($courseid);
858: #
859: my $dbh = &Apache::lonmysql::get_dbh();
1.89 matthew 860: foreach my $table (@Tables) {
1.70 matthew 861: my $command = 'DROP TABLE '.$table.';';
862: $dbh->do($command);
863: if ($dbh->err) {
864: &Apache::lonnet::logthis($command.' resulted in error: '.$dbh->errstr);
865: }
866: }
867: return;
1.57 matthew 868: }
869:
870: ################################################
871: ################################################
872:
873: =pod
874:
875: =item &get_part_id()
876:
877: Get the MySQL id of a problem part string.
878:
879: Input: $part
880:
881: Output: undef on error, integer $part_id on success.
882:
883: =item &get_part()
884:
885: Get the string describing a part from the MySQL id of the problem part.
886:
887: Input: $part_id
888:
889: Output: undef on error, $part string on success.
890:
891: =cut
892:
893: ################################################
894: ################################################
895:
1.61 matthew 896: my $have_read_part_table = 0;
1.57 matthew 897: my %ids_by_part;
898: my %parts_by_id;
899:
900: sub get_part_id {
901: my ($part) = @_;
1.61 matthew 902: $part = 0 if (! defined($part));
903: if (! $have_read_part_table) {
904: my @Result = &Apache::lonmysql::get_rows($part_table);
905: foreach (@Result) {
906: $ids_by_part{$_->[1]}=$_->[0];
907: }
908: $have_read_part_table = 1;
909: }
1.57 matthew 910: if (! exists($ids_by_part{$part})) {
911: &Apache::lonmysql::store_row($part_table,[undef,$part]);
912: undef(%ids_by_part);
913: my @Result = &Apache::lonmysql::get_rows($part_table);
914: foreach (@Result) {
915: $ids_by_part{$_->[1]}=$_->[0];
916: }
917: }
918: return $ids_by_part{$part} if (exists($ids_by_part{$part}));
919: return undef; # error
920: }
921:
922: sub get_part {
923: my ($part_id) = @_;
924: if (! exists($parts_by_id{$part_id}) ||
925: ! defined($parts_by_id{$part_id}) ||
926: $parts_by_id{$part_id} eq '') {
927: my @Result = &Apache::lonmysql::get_rows($part_table);
928: foreach (@Result) {
929: $parts_by_id{$_->[0]}=$_->[1];
930: }
931: }
932: return $parts_by_id{$part_id} if(exists($parts_by_id{$part_id}));
933: return undef; # error
934: }
935:
936: ################################################
937: ################################################
938:
939: =pod
940:
941: =item &get_symb_id()
942:
943: Get the MySQL id of a symb.
944:
945: Input: $symb
946:
947: Output: undef on error, integer $symb_id on success.
948:
949: =item &get_symb()
950:
951: Get the symb associated with a MySQL symb_id.
952:
953: Input: $symb_id
954:
955: Output: undef on error, $symb on success.
956:
957: =cut
958:
959: ################################################
960: ################################################
961:
1.61 matthew 962: my $have_read_symb_table = 0;
1.57 matthew 963: my %ids_by_symb;
964: my %symbs_by_id;
965:
966: sub get_symb_id {
967: my ($symb) = @_;
1.61 matthew 968: if (! $have_read_symb_table) {
969: my @Result = &Apache::lonmysql::get_rows($symb_table);
970: foreach (@Result) {
971: $ids_by_symb{$_->[1]}=$_->[0];
972: }
973: $have_read_symb_table = 1;
974: }
1.57 matthew 975: if (! exists($ids_by_symb{$symb})) {
976: &Apache::lonmysql::store_row($symb_table,[undef,$symb]);
977: undef(%ids_by_symb);
978: my @Result = &Apache::lonmysql::get_rows($symb_table);
979: foreach (@Result) {
980: $ids_by_symb{$_->[1]}=$_->[0];
981: }
982: }
983: return $ids_by_symb{$symb} if(exists( $ids_by_symb{$symb}));
984: return undef; # error
985: }
986:
987: sub get_symb {
988: my ($symb_id) = @_;
989: if (! exists($symbs_by_id{$symb_id}) ||
990: ! defined($symbs_by_id{$symb_id}) ||
991: $symbs_by_id{$symb_id} eq '') {
992: my @Result = &Apache::lonmysql::get_rows($symb_table);
993: foreach (@Result) {
994: $symbs_by_id{$_->[0]}=$_->[1];
995: }
996: }
997: return $symbs_by_id{$symb_id} if(exists( $symbs_by_id{$symb_id}));
998: return undef; # error
999: }
1000:
1001: ################################################
1002: ################################################
1003:
1004: =pod
1005:
1006: =item &get_student_id()
1007:
1008: Get the MySQL id of a student.
1009:
1010: Input: $sname, $dom
1011:
1012: Output: undef on error, integer $student_id on success.
1013:
1014: =item &get_student()
1015:
1016: Get student username:domain associated with the MySQL student_id.
1017:
1018: Input: $student_id
1019:
1020: Output: undef on error, string $student (username:domain) on success.
1021:
1022: =cut
1023:
1024: ################################################
1025: ################################################
1026:
1.61 matthew 1027: my $have_read_student_table = 0;
1.57 matthew 1028: my %ids_by_student;
1029: my %students_by_id;
1030:
1031: sub get_student_id {
1032: my ($sname,$sdom) = @_;
1033: my $student = $sname.':'.$sdom;
1.61 matthew 1034: if (! $have_read_student_table) {
1035: my @Result = &Apache::lonmysql::get_rows($student_table);
1036: foreach (@Result) {
1037: $ids_by_student{$_->[1]}=$_->[0];
1038: }
1039: $have_read_student_table = 1;
1040: }
1.57 matthew 1041: if (! exists($ids_by_student{$student})) {
1.85 matthew 1042: &Apache::lonmysql::store_row($student_table,[undef,$student,undef]);
1.57 matthew 1043: undef(%ids_by_student);
1044: my @Result = &Apache::lonmysql::get_rows($student_table);
1045: foreach (@Result) {
1046: $ids_by_student{$_->[1]}=$_->[0];
1047: }
1048: }
1049: return $ids_by_student{$student} if(exists( $ids_by_student{$student}));
1050: return undef; # error
1051: }
1052:
1053: sub get_student {
1054: my ($student_id) = @_;
1055: if (! exists($students_by_id{$student_id}) ||
1056: ! defined($students_by_id{$student_id}) ||
1057: $students_by_id{$student_id} eq '') {
1058: my @Result = &Apache::lonmysql::get_rows($student_table);
1059: foreach (@Result) {
1060: $students_by_id{$_->[0]}=$_->[1];
1061: }
1062: }
1063: return $students_by_id{$student_id} if(exists($students_by_id{$student_id}));
1064: return undef; # error
1065: }
1.99 matthew 1066:
1067: ################################################
1068: ################################################
1069:
1070: =pod
1071:
1072: =item &clear_internal_caches()
1073:
1074: Causes the internal caches used in get_student_id, get_student,
1075: get_symb_id, get_symb, get_part_id, and get_part to be undef'd.
1076:
1077: Needs to be called before the first operation with the MySQL database
1078: for a given Apache request.
1079:
1080: =cut
1081:
1082: ################################################
1083: ################################################
1084: sub clear_internal_caches {
1085: $have_read_part_table = 0;
1086: undef(%ids_by_part);
1087: undef(%parts_by_id);
1088: $have_read_symb_table = 0;
1089: undef(%ids_by_symb);
1090: undef(%symbs_by_id);
1091: $have_read_student_table = 0;
1092: undef(%ids_by_student);
1093: undef(%students_by_id);
1094: }
1095:
1.57 matthew 1096:
1097: ################################################
1098: ################################################
1099:
1100: =pod
1101:
1.89 matthew 1102: =item &update_full_student_data($sname,$sdom,$courseid)
1103:
1104: Does a lonnet::dump on a student to populate the courses tables.
1105:
1106: Input: $sname, $sdom, $courseid
1107:
1108: Output: $returnstatus
1109:
1110: $returnstatus is a string describing any errors that occured. 'okay' is the
1111: default.
1112:
1113: This subroutine loads a students data using lonnet::dump and inserts
1114: it into the MySQL database. The inserts are done on three tables,
1115: $fulldump_response_table, $fulldump_part_table, and $fulldump_timestamp_table.
1116: The INSERT calls are made directly by this subroutine, not through lonmysql
1117: because we do a 'bulk'insert which takes advantage of MySQLs non-SQL
1118: compliant INSERT command to insert multiple rows at a time.
1119: If anything has gone wrong during this process, $returnstatus is updated with
1120: a description of the error.
1121:
1122: Once the "fulldump" tables are updated, the tables used for chart and
1123: spreadsheet (which hold only the current state of the student on their
1124: homework, not historical data) are updated. If all updates have occured
1125: successfully, the studentdata table is updated to reflect the time of the
1126: update.
1127:
1128: Notice we do not insert the data and immediately query it. This means it
1129: is possible for there to be data returned this first time that is not
1130: available the second time. CYA.
1131:
1132: =cut
1133:
1134: ################################################
1135: ################################################
1136: sub update_full_student_data {
1137: my ($sname,$sdom,$courseid) = @_;
1138: #
1139: # Set up database names
1140: &setup_table_names($courseid);
1141: #
1142: my $student_id = &get_student_id($sname,$sdom);
1143: my $student = $sname.':'.$sdom;
1144: #
1145: my $returnstatus = 'okay';
1146: #
1147: # Download students data
1148: my $time_of_retrieval = time;
1149: my @tmp = &Apache::lonnet::dump($courseid,$sdom,$sname);
1150: if (@tmp && $tmp[0] =~ /^error/) {
1151: $returnstatus = 'error retrieving full student data';
1152: return $returnstatus;
1153: } elsif (! @tmp) {
1154: $returnstatus = 'okay: no student data';
1155: return $returnstatus;
1156: }
1157: my %studentdata = @tmp;
1158: #
1159: # Get database handle and clean out the tables
1160: my $dbh = &Apache::lonmysql::get_dbh();
1161: $dbh->do('DELETE FROM '.$fulldump_response_table.' WHERE student_id='.
1162: $student_id);
1163: $dbh->do('DELETE FROM '.$fulldump_part_table.' WHERE student_id='.
1164: $student_id);
1165: $dbh->do('DELETE FROM '.$fulldump_timestamp_table.' WHERE student_id='.
1166: $student_id);
1167: #
1168: # Parse and store the data into a form we can handle
1169: my $partdata;
1170: my $respdata;
1171: while (my ($key,$value) = each(%studentdata)) {
1172: next if ($key =~ /^(\d+):(resource$|subnum$|keys:)/);
1173: my ($transaction,$symb,$parameter) = split(':',$key);
1174: my $symb_id = &get_symb_id($symb);
1175: if ($parameter eq 'timestamp') {
1176: # We can deal with 'timestamp' right away
1177: my @timestamp_storage = ($symb_id,$student_id,
1178: $transaction,$value);
1.98 matthew 1179: my $store_command = 'INSERT IGNORE INTO '.$fulldump_timestamp_table.
1.89 matthew 1180: " VALUES ('".join("','",@timestamp_storage)."');";
1181: $dbh->do($store_command);
1182: if ($dbh->err()) {
1183: &Apache::lonnet::logthis('unable to execute '.$store_command);
1184: &Apache::lonnet::logthis($dbh->errstr());
1185: }
1186: next;
1187: } elsif ($parameter eq 'version') {
1188: next;
1.90 matthew 1189: } elsif ($parameter =~ /^resource\.(.*)\.(tries|
1190: award|
1191: awarded|
1192: previous|
1193: solved|
1194: awarddetail|
1195: submission|
1196: submissiongrading|
1197: molecule)\s*$/x){
1.89 matthew 1198: # we do not have enough information to store an
1199: # entire row, so we save it up until later.
1200: my ($part_and_resp_id,$field) = ($1,$2);
1201: my ($part,$part_id,$resp,$resp_id);
1202: if ($part_and_resp_id =~ /\./) {
1203: ($part,$resp) = split(/\./,$part_and_resp_id);
1204: $part_id = &get_part_id($part);
1205: $resp_id = &get_part_id($resp);
1206: } else {
1207: $part_id = &get_part_id($part_and_resp_id);
1208: }
1.90 matthew 1209: # Deal with part specific data
1.89 matthew 1210: if ($field =~ /^(tries|award|awarded|previous)$/) {
1211: $partdata->{$symb_id}->{$part_id}->{$transaction}->{$field}=$value;
1212: }
1.90 matthew 1213: # deal with response specific data
1.89 matthew 1214: if (defined($resp_id) &&
1.100 matthew 1215: $field =~ /^(awarddetail|
1.90 matthew 1216: submission|
1217: submissiongrading|
1218: molecule)$/x) {
1.89 matthew 1219: if ($field eq 'submission') {
1220: # We have to be careful with user supplied input.
1221: # most of the time we are okay because it is escaped.
1222: # However, there is one wrinkle: submissions which end in
1223: # and odd number of '\' cause insert errors to occur.
1224: # Best trap this somehow...
1225: my ($offensive_string) = ($value =~ /(\\+)$/);
1226: if (length($offensive_string) % 2) {
1227: $value =~ s/\\$/\\\\/;
1228: }
1229: }
1.90 matthew 1230: if ($field eq 'submissiongrading' ||
1231: $field eq 'molecule') {
1232: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific'}=$field;
1233: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific_value'}=$value;
1234: } else {
1235: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{$field}=$value;
1236: }
1.89 matthew 1237: }
1238: }
1239: }
1240: ##
1241: ## Store the part data
1.98 matthew 1242: my $store_command = 'INSERT IGNORE INTO '.$fulldump_part_table.
1.89 matthew 1243: ' VALUES '."\n";
1244: my $store_rows = 0;
1245: while (my ($symb_id,$hash1) = each (%$partdata)) {
1246: while (my ($part_id,$hash2) = each (%$hash1)) {
1247: while (my ($transaction,$data) = each (%$hash2)) {
1248: $store_command .= "('".join("','",$symb_id,$part_id,
1249: $student_id,
1250: $transaction,
1.101 ! matthew 1251: $data->{'tries'},
1.89 matthew 1252: $data->{'award'},
1253: $data->{'awarded'},
1254: $data->{'previous'})."'),";
1255: $store_rows++;
1256: }
1257: }
1258: }
1259: if ($store_rows) {
1260: chop($store_command);
1261: $dbh->do($store_command);
1262: if ($dbh->err) {
1263: $returnstatus = 'error storing part data';
1264: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
1265: &Apache::lonnet::logthis("While attempting\n".$store_command);
1266: }
1267: }
1268: ##
1269: ## Store the response data
1.98 matthew 1270: $store_command = 'INSERT IGNORE INTO '.$fulldump_response_table.
1.89 matthew 1271: ' VALUES '."\n";
1272: $store_rows = 0;
1273: while (my ($symb_id,$hash1) = each (%$respdata)) {
1274: while (my ($part_id,$hash2) = each (%$hash1)) {
1275: while (my ($resp_id,$hash3) = each (%$hash2)) {
1276: while (my ($transaction,$data) = each (%$hash3)) {
1277: $store_command .= "('".join("','",$symb_id,$part_id,
1278: $resp_id,$student_id,
1279: $transaction,
1280: $data->{'awarddetail'},
1.90 matthew 1281: $data->{'response_specific'},
1282: $data->{'response_specific_value'},
1.89 matthew 1283: $data->{'submission'})."'),";
1284: $store_rows++;
1285: }
1286: }
1287: }
1288: }
1289: if ($store_rows) {
1290: chop($store_command);
1291: $dbh->do($store_command);
1292: if ($dbh->err) {
1293: $returnstatus = 'error storing response data';
1294: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
1295: &Apache::lonnet::logthis("While attempting\n".$store_command);
1296: }
1297: }
1298: ##
1299: ## Update the students "current" data in the performance
1300: ## and parameters tables.
1301: my ($status,undef) = &store_student_data
1302: ($sname,$sdom,$courseid,
1303: &Apache::lonnet::convert_dump_to_currentdump(\%studentdata));
1304: if ($returnstatus eq 'okay' && $status ne 'okay') {
1305: $returnstatus = 'error storing current data:'.$status;
1306: } elsif ($status ne 'okay') {
1307: $returnstatus .= ' error storing current data:'.$status;
1308: }
1309: ##
1310: ## Update the students time......
1311: if ($returnstatus eq 'okay') {
1312: &Apache::lonmysql::replace_row
1313: ($studentdata_table,
1314: [$student_id,$time_of_retrieval,$time_of_retrieval,undef,undef]);
1315: }
1316: return $returnstatus;
1317: }
1318:
1319: ################################################
1320: ################################################
1321:
1322: =pod
1323:
1.57 matthew 1324: =item &update_student_data()
1325:
1326: Input: $sname, $sdom, $courseid
1327:
1328: Output: $returnstatus, \%student_data
1329:
1330: $returnstatus is a string describing any errors that occured. 'okay' is the
1331: default.
1332: \%student_data is the data returned by a call to lonnet::currentdump.
1333:
1334: This subroutine loads a students data using lonnet::currentdump and inserts
1335: it into the MySQL database. The inserts are done on two tables,
1336: $performance_table and $parameters_table. $parameters_table holds the data
1337: that is not included in $performance_table. See the description of
1338: $performance_table elsewhere in this file. The INSERT calls are made
1339: directly by this subroutine, not through lonmysql because we do a 'bulk'
1340: insert which takes advantage of MySQLs non-SQL compliant INSERT command to
1341: insert multiple rows at a time. If anything has gone wrong during this
1342: process, $returnstatus is updated with a description of the error and
1343: \%student_data is returned.
1344:
1345: Notice we do not insert the data and immediately query it. This means it
1346: is possible for there to be data returned this first time that is not
1347: available the second time. CYA.
1348:
1349: =cut
1350:
1351: ################################################
1352: ################################################
1353: sub update_student_data {
1354: my ($sname,$sdom,$courseid) = @_;
1355: #
1.60 matthew 1356: # Set up database names
1357: &setup_table_names($courseid);
1358: #
1.57 matthew 1359: my $student_id = &get_student_id($sname,$sdom);
1360: my $student = $sname.':'.$sdom;
1361: #
1362: my $returnstatus = 'okay';
1363: #
1364: # Download students data
1365: my $time_of_retrieval = time;
1366: my @tmp = &Apache::lonnet::currentdump($courseid,$sdom,$sname);
1367: if ((scalar(@tmp) > 0) && ($tmp[0] =~ /^error:/)) {
1368: &Apache::lonnet::logthis('error getting data for '.
1369: $sname.':'.$sdom.' in course '.$courseid.
1370: ':'.$tmp[0]);
1371: $returnstatus = 'error getting data';
1.79 matthew 1372: return ($returnstatus,undef);
1.57 matthew 1373: }
1374: if (scalar(@tmp) < 1) {
1375: return ('no data',undef);
1376: }
1377: my %student_data = @tmp;
1.89 matthew 1378: my @Results = &store_student_data($sname,$sdom,$courseid,\%student_data);
1379: #
1380: # Set the students update time
1.96 matthew 1381: if ($Results[0] eq 'okay') {
1.95 matthew 1382: &Apache::lonmysql::replace_row($studentdata_table,
1.89 matthew 1383: [$student_id,$time_of_retrieval,undef,undef,undef]);
1.95 matthew 1384: }
1.89 matthew 1385: #
1386: return @Results;
1387: }
1388:
1389: sub store_student_data {
1390: my ($sname,$sdom,$courseid,$student_data) = @_;
1391: #
1392: my $student_id = &get_student_id($sname,$sdom);
1393: my $student = $sname.':'.$sdom;
1394: #
1395: my $returnstatus = 'okay';
1.57 matthew 1396: #
1397: # Remove all of the students data from the table
1.60 matthew 1398: my $dbh = &Apache::lonmysql::get_dbh();
1399: $dbh->do('DELETE FROM '.$performance_table.' WHERE student_id='.
1400: $student_id);
1401: $dbh->do('DELETE FROM '.$parameters_table.' WHERE student_id='.
1402: $student_id);
1.57 matthew 1403: #
1404: # Store away the data
1405: #
1406: my $starttime = Time::HiRes::time;
1407: my $elapsed = 0;
1408: my $rows_stored;
1.98 matthew 1409: my $store_parameters_command = 'INSERT IGNORE INTO '.$parameters_table.
1.60 matthew 1410: ' VALUES '."\n";
1.61 matthew 1411: my $num_parameters = 0;
1.98 matthew 1412: my $store_performance_command = 'INSERT IGNORE INTO '.$performance_table.
1.60 matthew 1413: ' VALUES '."\n";
1.79 matthew 1414: return ('error',undef) if (! defined($dbh));
1.89 matthew 1415: while (my ($current_symb,$param_hash) = each(%{$student_data})) {
1.57 matthew 1416: #
1417: # make sure the symb is set up properly
1418: my $symb_id = &get_symb_id($current_symb);
1419: #
1420: # Load data into the tables
1.63 matthew 1421: while (my ($parameter,$value) = each(%$param_hash)) {
1.57 matthew 1422: my $newstring;
1.63 matthew 1423: if ($parameter !~ /(timestamp|resource\.(.*)\.(solved|tries|awarded|award|awarddetail|previous))/) {
1.57 matthew 1424: $newstring = "('".join("','",
1425: $symb_id,$student_id,
1.69 matthew 1426: $parameter)."',".
1427: $dbh->quote($value)."),\n";
1.61 matthew 1428: $num_parameters ++;
1.57 matthew 1429: if ($newstring !~ /''/) {
1430: $store_parameters_command .= $newstring;
1431: $rows_stored++;
1432: }
1433: }
1434: next if ($parameter !~ /^resource\.(.*)\.solved$/);
1435: #
1436: my $part = $1;
1437: my $part_id = &get_part_id($part);
1438: next if (!defined($part_id));
1439: my $solved = $value;
1440: my $tries = $param_hash->{'resource.'.$part.'.tries'};
1441: my $awarded = $param_hash->{'resource.'.$part.'.awarded'};
1442: my $award = $param_hash->{'resource.'.$part.'.award'};
1443: my $awarddetail = $param_hash->{'resource.'.$part.'.awarddetail'};
1444: my $timestamp = $param_hash->{'timestamp'};
1.60 matthew 1445: #
1.74 matthew 1446: $solved = '' if (! defined($solved));
1.57 matthew 1447: $tries = '' if (! defined($tries));
1448: $awarded = '' if (! defined($awarded));
1449: $award = '' if (! defined($award));
1450: $awarddetail = '' if (! defined($awarddetail));
1.73 matthew 1451: $newstring = "('".join("','",$symb_id,$student_id,$part_id,$part,
1.57 matthew 1452: $solved,$tries,$awarded,$award,
1.63 matthew 1453: $awarddetail,$timestamp)."'),\n";
1.57 matthew 1454: $store_performance_command .= $newstring;
1455: $rows_stored++;
1456: }
1457: }
1458: chop $store_parameters_command;
1.60 matthew 1459: chop $store_parameters_command;
1460: chop $store_performance_command;
1.57 matthew 1461: chop $store_performance_command;
1462: my $start = Time::HiRes::time;
1.94 matthew 1463: $dbh->do($store_performance_command);
1464: if ($dbh->err()) {
1465: &Apache::lonnet::logthis(' bigass insert error:'.$dbh->errstr());
1466: &Apache::lonnet::logthis('command = '.$store_performance_command);
1467: $returnstatus = 'error: unable to insert performance into database';
1468: return ($returnstatus,$student_data);
1469: }
1.61 matthew 1470: $dbh->do($store_parameters_command) if ($num_parameters>0);
1.57 matthew 1471: if ($dbh->err()) {
1472: &Apache::lonnet::logthis(' bigass insert error:'.$dbh->errstr());
1.61 matthew 1473: &Apache::lonnet::logthis('command = '.$store_parameters_command);
1.87 matthew 1474: &Apache::lonnet::logthis('rows_stored = '.$rows_stored);
1475: &Apache::lonnet::logthis('student_id = '.$student_id);
1.57 matthew 1476: $returnstatus = 'error: unable to insert parameters into database';
1.89 matthew 1477: return ($returnstatus,$student_data);
1.57 matthew 1478: }
1479: $elapsed += Time::HiRes::time - $start;
1.89 matthew 1480: return ($returnstatus,$student_data);
1.57 matthew 1481: }
1482:
1.89 matthew 1483: ######################################
1484: ######################################
1.57 matthew 1485:
1486: =pod
1487:
1.89 matthew 1488: =item &ensure_tables_are_set_up($courseid)
1.57 matthew 1489:
1.89 matthew 1490: Checks to be sure the MySQL tables for the given class are set up.
1491: If $courseid is omitted it will be obtained from the environment.
1.57 matthew 1492:
1.89 matthew 1493: Returns nothing on success and 'error' on failure
1.57 matthew 1494:
1495: =cut
1496:
1.89 matthew 1497: ######################################
1498: ######################################
1499: sub ensure_tables_are_set_up {
1500: my ($courseid) = @_;
1.61 matthew 1501: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1502: #
1503: # Clean out package variables
1.57 matthew 1504: &setup_table_names($courseid);
1505: #
1506: # if the tables do not exist, make them
1507: my @CurrentTable = &Apache::lonmysql::tables_in_db();
1.87 matthew 1508: my ($found_symb,$found_student,$found_part,$found_studentdata,
1.89 matthew 1509: $found_performance,$found_parameters,$found_fulldump_part,
1510: $found_fulldump_response,$found_fulldump_timestamp);
1.57 matthew 1511: foreach (@CurrentTable) {
1512: $found_symb = 1 if ($_ eq $symb_table);
1513: $found_student = 1 if ($_ eq $student_table);
1514: $found_part = 1 if ($_ eq $part_table);
1.87 matthew 1515: $found_studentdata = 1 if ($_ eq $studentdata_table);
1.57 matthew 1516: $found_performance = 1 if ($_ eq $performance_table);
1517: $found_parameters = 1 if ($_ eq $parameters_table);
1.89 matthew 1518: $found_fulldump_part = 1 if ($_ eq $fulldump_part_table);
1519: $found_fulldump_response = 1 if ($_ eq $fulldump_response_table);
1520: $found_fulldump_timestamp = 1 if ($_ eq $fulldump_timestamp_table);
1.57 matthew 1521: }
1.87 matthew 1522: if (!$found_symb || !$found_studentdata ||
1.57 matthew 1523: !$found_student || !$found_part ||
1.89 matthew 1524: !$found_performance || !$found_parameters ||
1525: !$found_fulldump_part || !$found_fulldump_response ||
1526: !$found_fulldump_timestamp ) {
1.57 matthew 1527: if (&init_dbs($courseid)) {
1.89 matthew 1528: return 'error';
1.57 matthew 1529: }
1530: }
1.89 matthew 1531: }
1532:
1533: ################################################
1534: ################################################
1535:
1536: =pod
1537:
1538: =item &ensure_current_data()
1539:
1540: Input: $sname, $sdom, $courseid
1541:
1542: Output: $status, $data
1543:
1544: This routine ensures the data for a given student is up to date.
1545: The $studentdata_table is queried to determine the time of the last update.
1546: If the students data is out of date, &update_student_data() is called.
1547: The return values from the call to &update_student_data() are returned.
1548:
1549: =cut
1550:
1551: ################################################
1552: ################################################
1553: sub ensure_current_data {
1554: my ($sname,$sdom,$courseid) = @_;
1555: my $status = 'okay'; # return value
1556: #
1557: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1558: &ensure_tables_are_set_up($courseid);
1.57 matthew 1559: #
1560: # Get the update time for the user
1561: my $updatetime = 0;
1.60 matthew 1562: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1563: ($sdom,$sname,$courseid.'.db',
1564: $Apache::lonnet::perlvar{'lonUsersDir'});
1.57 matthew 1565: #
1.87 matthew 1566: my $student_id = &get_student_id($sname,$sdom);
1567: my @Result = &Apache::lonmysql::get_rows($studentdata_table,
1568: "student_id ='$student_id'");
1.57 matthew 1569: my $data = undef;
1570: if (@Result) {
1571: $updatetime = $Result[0]->[1];
1572: }
1573: if ($modifiedtime > $updatetime) {
1574: ($status,$data) = &update_student_data($sname,$sdom,$courseid);
1575: }
1576: return ($status,$data);
1577: }
1578:
1579: ################################################
1580: ################################################
1581:
1582: =pod
1583:
1.89 matthew 1584: =item &ensure_current_full_data($sname,$sdom,$courseid)
1585:
1586: Input: $sname, $sdom, $courseid
1587:
1588: Output: $status
1589:
1590: This routine ensures the fulldata (the data from a lonnet::dump, not a
1591: lonnet::currentdump) for a given student is up to date.
1592: The $studentdata_table is queried to determine the time of the last update.
1593: If the students fulldata is out of date, &update_full_student_data() is
1594: called.
1595:
1596: The return value from the call to &update_full_student_data() is returned.
1597:
1598: =cut
1599:
1600: ################################################
1601: ################################################
1602: sub ensure_current_full_data {
1603: my ($sname,$sdom,$courseid) = @_;
1604: my $status = 'okay'; # return value
1605: #
1606: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1607: &ensure_tables_are_set_up($courseid);
1608: #
1609: # Get the update time for the user
1610: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1611: ($sdom,$sname,$courseid.'.db',
1612: $Apache::lonnet::perlvar{'lonUsersDir'});
1613: #
1614: my $student_id = &get_student_id($sname,$sdom);
1615: my @Result = &Apache::lonmysql::get_rows($studentdata_table,
1616: "student_id ='$student_id'");
1617: my $updatetime;
1618: if (@Result && ref($Result[0]) eq 'ARRAY') {
1619: $updatetime = $Result[0]->[2];
1620: }
1621: if (! defined($updatetime) || $modifiedtime > $updatetime) {
1622: $status = &update_full_student_data($sname,$sdom,$courseid);
1623: }
1624: return $status;
1625: }
1626:
1627: ################################################
1628: ################################################
1629:
1630: =pod
1631:
1.57 matthew 1632: =item &get_student_data_from_performance_cache()
1633:
1634: Input: $sname, $sdom, $symb, $courseid
1635:
1636: Output: hash reference containing the data for the given student.
1637: If $symb is undef, all the students data is returned.
1638:
1639: This routine is the heart of the local caching system. See the description
1640: of $performance_table, $symb_table, $student_table, and $part_table. The
1641: main task is building the MySQL request. The tables appear in the request
1642: in the order in which they should be parsed by MySQL. When searching
1643: on a student the $student_table is used to locate the 'student_id'. All
1644: rows in $performance_table which have a matching 'student_id' are returned,
1645: with data from $part_table and $symb_table which match the entries in
1646: $performance_table, 'part_id' and 'symb_id'. When searching on a symb,
1647: the $symb_table is processed first, with matching rows grabbed from
1648: $performance_table and filled in from $part_table and $student_table in
1649: that order.
1650:
1651: Running 'EXPLAIN ' on the 'SELECT' statements generated can be quite
1652: interesting, especially if you play with the order the tables are listed.
1653:
1654: =cut
1655:
1656: ################################################
1657: ################################################
1658: sub get_student_data_from_performance_cache {
1659: my ($sname,$sdom,$symb,$courseid)=@_;
1660: my $student = $sname.':'.$sdom if (defined($sname) && defined($sdom));
1.61 matthew 1661: &setup_table_names($courseid);
1.57 matthew 1662: #
1663: # Return hash
1664: my $studentdata;
1665: #
1666: my $dbh = &Apache::lonmysql::get_dbh();
1667: my $request = "SELECT ".
1.73 matthew 1668: "d.symb,a.part,a.solved,a.tries,a.awarded,a.award,a.awarddetail,".
1.63 matthew 1669: "a.timestamp ";
1.57 matthew 1670: if (defined($student)) {
1671: $request .= "FROM $student_table AS b ".
1672: "LEFT JOIN $performance_table AS a ON b.student_id=a.student_id ".
1.73 matthew 1673: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1.57 matthew 1674: "LEFT JOIN $symb_table AS d ON d.symb_id = a.symb_id ".
1675: "WHERE student='$student'";
1676: if (defined($symb) && $symb ne '') {
1.67 matthew 1677: $request .= " AND d.symb=".$dbh->quote($symb);
1.57 matthew 1678: }
1679: } elsif (defined($symb) && $symb ne '') {
1680: $request .= "FROM $symb_table as d ".
1681: "LEFT JOIN $performance_table AS a ON d.symb_id=a.symb_id ".
1.73 matthew 1682: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1.57 matthew 1683: "LEFT JOIN $student_table AS b ON b.student_id = a.student_id ".
1684: "WHERE symb='".$dbh->quote($symb)."'";
1685: }
1686: my $starttime = Time::HiRes::time;
1687: my $rows_retrieved = 0;
1688: my $sth = $dbh->prepare($request);
1689: $sth->execute();
1690: if ($sth->err()) {
1691: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1692: &Apache::lonnet::logthis("\n".$request."\n");
1693: &Apache::lonnet::logthis("error is:".$sth->errstr());
1694: return undef;
1695: }
1696: foreach my $row (@{$sth->fetchall_arrayref}) {
1697: $rows_retrieved++;
1.63 matthew 1698: my ($symb,$part,$solved,$tries,$awarded,$award,$awarddetail,$time) =
1.57 matthew 1699: (@$row);
1700: my $base = 'resource.'.$part;
1701: $studentdata->{$symb}->{$base.'.solved'} = $solved;
1702: $studentdata->{$symb}->{$base.'.tries'} = $tries;
1703: $studentdata->{$symb}->{$base.'.awarded'} = $awarded;
1704: $studentdata->{$symb}->{$base.'.award'} = $award;
1705: $studentdata->{$symb}->{$base.'.awarddetail'} = $awarddetail;
1706: $studentdata->{$symb}->{'timestamp'} = $time if (defined($time) && $time ne '');
1.67 matthew 1707: }
1.97 matthew 1708: ## Get misc parameters
1709: $request = 'SELECT c.symb,a.parameter,a.value '.
1710: "FROM $student_table AS b ".
1711: "LEFT JOIN $parameters_table AS a ON b.student_id=a.student_id ".
1712: "LEFT JOIN $symb_table AS c ON c.symb_id = a.symb_id ".
1713: "WHERE student='$student'";
1714: if (defined($symb) && $symb ne '') {
1715: $request .= " AND c.symb=".$dbh->quote($symb);
1716: }
1717: $sth = $dbh->prepare($request);
1718: $sth->execute();
1719: if ($sth->err()) {
1720: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1721: &Apache::lonnet::logthis("\n".$request."\n");
1722: &Apache::lonnet::logthis("error is:".$sth->errstr());
1723: if (defined($symb) && $symb ne '') {
1724: $studentdata = $studentdata->{$symb};
1725: }
1726: return $studentdata;
1727: }
1728: #
1729: foreach my $row (@{$sth->fetchall_arrayref}) {
1730: $rows_retrieved++;
1731: my ($symb,$parameter,$value) = (@$row);
1732: $studentdata->{$symb}->{$parameter} = $value;
1733: }
1734: #
1.67 matthew 1735: if (defined($symb) && $symb ne '') {
1736: $studentdata = $studentdata->{$symb};
1.57 matthew 1737: }
1738: return $studentdata;
1739: }
1740:
1741: ################################################
1742: ################################################
1743:
1744: =pod
1745:
1746: =item &get_current_state()
1747:
1748: Input: $sname,$sdom,$symb,$courseid
1749:
1750: Output: Described below
1.46 matthew 1751:
1.47 matthew 1752: Retrieve the current status of a students performance. $sname and
1.46 matthew 1753: $sdom are the only required parameters. If $symb is undef the results
1.47 matthew 1754: of an &Apache::lonnet::currentdump() will be returned.
1.46 matthew 1755: If $courseid is undef it will be retrieved from the environment.
1756:
1757: The return structure is based on &Apache::lonnet::currentdump. If
1758: $symb is unspecified, all the students data is returned in a hash of
1759: the form:
1760: (
1761: symb1 => { param1 => value1, param2 => value2 ... },
1762: symb2 => { param1 => value1, param2 => value2 ... },
1763: )
1764:
1765: If $symb is specified, a hash of
1766: (
1767: param1 => value1,
1768: param2 => value2,
1769: )
1770: is returned.
1771:
1.57 matthew 1772: If no data is found for $symb, or if the student has no performance data,
1.46 matthew 1773: an empty list is returned.
1774:
1775: =cut
1776:
1777: ################################################
1778: ################################################
1779: sub get_current_state {
1.47 matthew 1780: my ($sname,$sdom,$symb,$courseid,$forcedownload)=@_;
1781: #
1.46 matthew 1782: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1.47 matthew 1783: #
1.61 matthew 1784: return () if (! defined($sname) || ! defined($sdom));
1785: #
1.57 matthew 1786: my ($status,$data) = &ensure_current_data($sname,$sdom,$courseid);
1.77 matthew 1787: # &Apache::lonnet::logthis
1788: # ('sname = '.$sname.
1789: # ' domain = '.$sdom.
1790: # ' status = '.$status.
1791: # ' data is '.(defined($data)?'defined':'undefined'));
1.73 matthew 1792: # while (my ($symb,$hash) = each(%$data)) {
1793: # &Apache::lonnet::logthis($symb."\n----------------------------------");
1794: # while (my ($key,$value) = each (%$hash)) {
1795: # &Apache::lonnet::logthis(" ".$key." = ".$value);
1796: # }
1797: # }
1.47 matthew 1798: #
1.79 matthew 1799: if (defined($data) && defined($symb) && ref($data->{$symb})) {
1800: return %{$data->{$symb}};
1801: } elsif (defined($data) && ! defined($symb) && ref($data)) {
1802: return %$data;
1803: }
1804: if ($status eq 'no data') {
1.57 matthew 1805: return ();
1806: } else {
1807: if ($status ne 'okay' && $status ne '') {
1808: &Apache::lonnet::logthis('status = '.$status);
1.47 matthew 1809: return ();
1810: }
1.57 matthew 1811: my $returnhash = &get_student_data_from_performance_cache($sname,$sdom,
1812: $symb,$courseid);
1813: return %$returnhash if (defined($returnhash));
1.46 matthew 1814: }
1.57 matthew 1815: return ();
1.61 matthew 1816: }
1817:
1818: ################################################
1819: ################################################
1820:
1821: =pod
1822:
1823: =item &get_problem_statistics()
1824:
1825: Gather data on a given problem. The database is assumed to be
1826: populated and all local caching variables are assumed to be set
1827: properly. This means you need to call &ensure_current_data for
1828: the students you are concerned with prior to calling this routine.
1829:
1830: Inputs: $students, $symb, $part, $courseid
1831:
1.64 matthew 1832: =over 4
1833:
1834: =item $students is an array of hash references.
1835: Each hash must contain at least the 'username' and 'domain' of a student.
1836:
1837: =item $symb is the symb for the problem.
1838:
1839: =item $part is the part id you need statistics for
1840:
1841: =item $courseid is the course id, of course!
1842:
1843: =back
1844:
1.66 matthew 1845: Outputs: See the code for up to date information. A hash reference is
1846: returned. The hash has the following keys defined:
1.64 matthew 1847:
1848: =over 4
1849:
1.66 matthew 1850: =item num_students The number of students attempting the problem
1851:
1852: =item tries The total number of tries for the students
1853:
1854: =item max_tries The maximum number of tries taken
1855:
1856: =item mean_tries The average number of tries
1857:
1858: =item num_solved The number of students able to solve the problem
1859:
1860: =item num_override The number of students whose answer is 'correct_by_override'
1861:
1862: =item deg_of_diff The degree of difficulty of the problem
1863:
1864: =item std_tries The standard deviation of the number of tries
1865:
1866: =item skew_tries The skew of the number of tries
1.64 matthew 1867:
1.66 matthew 1868: =item per_wrong The number of students attempting the problem who were not
1869: able to answer it correctly.
1.64 matthew 1870:
1871: =back
1872:
1.61 matthew 1873: =cut
1874:
1875: ################################################
1876: ################################################
1877: sub get_problem_statistics {
1878: my ($students,$symb,$part,$courseid) = @_;
1879: return if (! defined($symb) || ! defined($part));
1880: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1881: #
1.100 matthew 1882: &setup_table_names($courseid);
1.61 matthew 1883: my $symb_id = &get_symb_id($symb);
1884: my $part_id = &get_part_id($part);
1885: my $stats_table = $courseid.'_problem_stats';
1886: #
1887: my $dbh = &Apache::lonmysql::get_dbh();
1888: return undef if (! defined($dbh));
1889: #
1890: # A) Number of Students attempting problem
1891: # B) Total number of tries of students attempting problem
1892: # C) Mod (largest number of tries for solving the problem)
1893: # D) Mean (average number of tries for solving the problem)
1894: # E) Number of students to solve the problem
1895: # F) Number of students to solve the problem by override
1896: # G) Number of students unable to solve the problem
1897: # H) Degree of difficulty : 1-(E+F)/B
1898: # I) Standard deviation of number of tries
1899: # J) Skew of tries: sqrt(sum(Xi-D)^3)/A
1900: #
1901: $dbh->do('DROP TABLE '.$stats_table); # May return an error
1902: my $request =
1903: 'CREATE TEMPORARY TABLE '.$stats_table.
1904: ' SELECT student_id,solved,award,tries FROM '.$performance_table.
1905: ' WHERE symb_id='.$symb_id.' AND part_id='.$part_id;
1.64 matthew 1906: if (defined($students)) {
1907: $request .= ' AND ('.
1908: join(' OR ', map {'student_id='.
1909: &get_student_id($_->{'username'},
1910: $_->{'domain'})
1911: } @$students
1912: ).')';
1913: }
1.61 matthew 1914: # &Apache::lonnet::logthis($request);
1915: $dbh->do($request);
1916: my ($num,$tries,$mod,$mean,$STD) = &execute_SQL_request
1917: ($dbh,
1918: 'SELECT COUNT(*),SUM(tries),MAX(tries),AVG(tries),STD(tries) FROM '.
1919: $stats_table);
1920: my ($Solved) = &execute_SQL_request($dbh,'SELECT COUNT(tries) FROM '.
1921: $stats_table.
1.92 matthew 1922: " WHERE solved='correct_by_student' OR solved='correct_by_scantron'");
1.61 matthew 1923: my ($solved) = &execute_SQL_request($dbh,'SELECT COUNT(tries) FROM '.
1924: $stats_table.
1925: " WHERE solved='correct_by_override'");
1926: $num = 0 if (! defined($num));
1927: $tries = 0 if (! defined($tries));
1928: $mod = 0 if (! defined($mod));
1929: $STD = 0 if (! defined($STD));
1930: $Solved = 0 if (! defined($Solved));
1931: $solved = 0 if (! defined($solved));
1932: #
1933: my $DegOfDiff = 'nan';
1.66 matthew 1934: $DegOfDiff = 1-($Solved)/$tries if ($tries>0);
1.61 matthew 1935:
1936: my $SKEW = 'nan';
1.66 matthew 1937: my $wrongpercent = 0;
1.61 matthew 1938: if ($num > 0) {
1939: ($SKEW) = &execute_SQL_request($dbh,'SELECT SQRT(SUM('.
1940: 'POWER(tries - '.$STD.',3)'.
1941: '))/'.$num.' FROM '.$stats_table);
1.66 matthew 1942: $wrongpercent=int(10*100*($num-$Solved+$solved)/$num)/10;
1.61 matthew 1943: }
1944: #
1945: $dbh->do('DROP TABLE '.$stats_table); # May return an error
1.81 matthew 1946: #
1947: # Store in metadata
1948: #
1.80 www 1949: if ($num) {
1950: my %storestats=();
1951:
1.86 www 1952: my $urlres=(&Apache::lonnet::decode_symb($symb))[2];
1.80 www 1953:
1954: $storestats{$courseid.'___'.$urlres.'___timestamp'}=time;
1955: $storestats{$courseid.'___'.$urlres.'___stdno'}=$num;
1956: $storestats{$courseid.'___'.$urlres.'___avetries'}=$mean;
1957: $storestats{$courseid.'___'.$urlres.'___difficulty'}=$DegOfDiff;
1958:
1959: $urlres=~/^(\w+)\/(\w+)/;
1960: &Apache::lonnet::put('nohist_resevaldata',\%storestats,$1,$2);
1961: }
1.81 matthew 1962: #
1963: # Return result
1964: #
1.66 matthew 1965: return { num_students => $num,
1966: tries => $tries,
1967: max_tries => $mod,
1968: mean_tries => $mean,
1969: std_tries => $STD,
1970: skew_tries => $SKEW,
1971: num_solved => $Solved,
1972: num_override => $solved,
1973: per_wrong => $wrongpercent,
1.81 matthew 1974: deg_of_diff => $DegOfDiff };
1.61 matthew 1975: }
1976:
1977: sub execute_SQL_request {
1978: my ($dbh,$request)=@_;
1979: # &Apache::lonnet::logthis($request);
1980: my $sth = $dbh->prepare($request);
1981: $sth->execute();
1982: my $row = $sth->fetchrow_arrayref();
1983: if (ref($row) eq 'ARRAY' && scalar(@$row)>0) {
1984: return @$row;
1985: }
1986: return ();
1987: }
1988:
1.100 matthew 1989: sub get_optionresponse_data {
1990: my ($students,$symb,$response,$courseid) = @_;
1991: return if (! defined($symb) ||
1992: ! defined($response));
1993: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1994: #
1995: &setup_table_names($courseid);
1996: my $symb_id = &get_symb_id($symb);
1997: my $response_id = &get_part_id($response);
1998: #
1999: my $dbh = &Apache::lonmysql::get_dbh();
2000: return undef if (! defined($dbh));
2001: my $request = 'SELECT '.
2002: 'a.response_specific_value, a.submission, b.timestamp, c.tries '.
2003: 'FROM '.$fulldump_response_table.' AS a '.
2004: 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2005: 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2006: 'a.transaction = b.transaction '.
2007: 'LEFT JOIN '.$fulldump_part_table.' AS c '.
2008: 'ON a.symb_id=c.symb_id AND a.student_id=c.student_id AND '.
2009: 'a.part_id=c.part_id AND a.transaction = c.transaction '.
2010: 'WHERE '.
2011: 'a.symb_id='.$symb_id.' AND a.response_id='.$response_id;
2012: if (defined($students)) {
2013: $request .= ' AND ('.
2014: join(' OR ', map {'student_id='.
2015: &get_student_id($_->{'username'},
2016: $_->{'domain'})
2017: } @$students
2018: ).')';
2019: }
2020: $request .= ' ORDER BY b.timestamp';
2021: &Apache::lonnet::logthis("request =\n".$request);
2022: my $sth = $dbh->prepare($request);
2023: $sth->execute();
2024: my $dataset = $sth->fetchall_arrayref();
2025: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2026: return @$dataset;
2027: }
2028: }
1.61 matthew 2029:
2030: ################################################
2031: ################################################
2032:
2033: =pod
2034:
2035: =item &setup_table_names()
2036:
2037: input: course id
2038:
2039: output: none
2040:
2041: Cleans up the package variables for local caching.
2042:
2043: =cut
2044:
2045: ################################################
2046: ################################################
2047: sub setup_table_names {
2048: my ($courseid) = @_;
2049: if (! defined($courseid)) {
2050: $courseid = $ENV{'request.course.id'};
2051: }
2052: #
2053: if (! defined($current_course) || $current_course ne $courseid) {
2054: # Clear out variables
2055: $have_read_part_table = 0;
2056: undef(%ids_by_part);
2057: undef(%parts_by_id);
2058: $have_read_symb_table = 0;
2059: undef(%ids_by_symb);
2060: undef(%symbs_by_id);
2061: $have_read_student_table = 0;
2062: undef(%ids_by_student);
2063: undef(%students_by_id);
2064: #
2065: $current_course = $courseid;
2066: }
2067: #
2068: # Set up database names
2069: my $base_id = $courseid;
2070: $symb_table = $base_id.'_'.'symb';
2071: $part_table = $base_id.'_'.'part';
2072: $student_table = $base_id.'_'.'student';
1.87 matthew 2073: $studentdata_table = $base_id.'_'.'studentdata';
1.61 matthew 2074: $performance_table = $base_id.'_'.'performance';
2075: $parameters_table = $base_id.'_'.'parameters';
1.89 matthew 2076: $fulldump_part_table = $base_id.'_'.'partdata';
2077: $fulldump_response_table = $base_id.'_'.'responsedata';
2078: $fulldump_timestamp_table = $base_id.'_'.'timestampdata';
2079: #
2080: @Tables = (
2081: $symb_table,
2082: $part_table,
2083: $student_table,
2084: $studentdata_table,
2085: $performance_table,
2086: $parameters_table,
2087: $fulldump_part_table,
2088: $fulldump_response_table,
2089: $fulldump_timestamp_table,
2090: );
1.61 matthew 2091: return;
1.3 stredwic 2092: }
1.1 stredwic 2093:
1.35 matthew 2094: ################################################
2095: ################################################
2096:
2097: =pod
2098:
1.57 matthew 2099: =back
2100:
2101: =item End of Local Data Caching Subroutines
2102:
2103: =cut
2104:
2105: ################################################
2106: ################################################
2107:
1.89 matthew 2108: } # End scope of table identifiers
1.57 matthew 2109:
2110: ################################################
2111: ################################################
2112:
2113: =pod
2114:
2115: =head3 Classlist Subroutines
2116:
1.35 matthew 2117: =item &get_classlist();
2118:
2119: Retrieve the classist of a given class or of the current class. Student
2120: information is returned from the classlist.db file and, if needed,
2121: from the students environment.
2122:
2123: Optional arguments are $cid, $cdom, and $cnum (course id, course domain,
2124: and course number, respectively). Any omitted arguments will be taken
2125: from the current environment ($ENV{'request.course.id'},
2126: $ENV{'course.'.$cid.'.domain'}, and $ENV{'course.'.$cid.'.num'}).
2127:
2128: Returns a reference to a hash which contains:
2129: keys '$sname:$sdom'
1.54 bowersj2 2130: values [$sdom,$sname,$end,$start,$id,$section,$fullname,$status]
2131:
2132: The constant values CL_SDOM, CL_SNAME, CL_END, etc. can be used
2133: as indices into the returned list to future-proof clients against
2134: changes in the list order.
1.35 matthew 2135:
2136: =cut
2137:
2138: ################################################
2139: ################################################
1.54 bowersj2 2140:
2141: sub CL_SDOM { return 0; }
2142: sub CL_SNAME { return 1; }
2143: sub CL_END { return 2; }
2144: sub CL_START { return 3; }
2145: sub CL_ID { return 4; }
2146: sub CL_SECTION { return 5; }
2147: sub CL_FULLNAME { return 6; }
2148: sub CL_STATUS { return 7; }
1.35 matthew 2149:
2150: sub get_classlist {
2151: my ($cid,$cdom,$cnum) = @_;
2152: $cid = $cid || $ENV{'request.course.id'};
2153: $cdom = $cdom || $ENV{'course.'.$cid.'.domain'};
2154: $cnum = $cnum || $ENV{'course.'.$cid.'.num'};
1.57 matthew 2155: my $now = time;
1.35 matthew 2156: #
2157: my %classlist=&Apache::lonnet::dump('classlist',$cdom,$cnum);
2158: while (my ($student,$info) = each(%classlist)) {
1.60 matthew 2159: if ($student =~ /^(con_lost|error|no_such_host)/i) {
2160: &Apache::lonnet::logthis('get_classlist error for '.$cid.':'.$student);
2161: return undef;
2162: }
1.35 matthew 2163: my ($sname,$sdom) = split(/:/,$student);
2164: my @Values = split(/:/,$info);
2165: my ($end,$start,$id,$section,$fullname);
2166: if (@Values > 2) {
2167: ($end,$start,$id,$section,$fullname) = @Values;
2168: } else { # We have to get the data ourselves
2169: ($end,$start) = @Values;
1.37 matthew 2170: $section = &Apache::lonnet::getsection($sdom,$sname,$cid);
1.35 matthew 2171: my %info=&Apache::lonnet::get('environment',
2172: ['firstname','middlename',
2173: 'lastname','generation','id'],
2174: $sdom, $sname);
2175: my ($tmp) = keys(%info);
2176: if ($tmp =~/^(con_lost|error|no_such_host)/i) {
2177: $fullname = 'not available';
2178: $id = 'not available';
1.38 matthew 2179: &Apache::lonnet::logthis('unable to retrieve environment '.
2180: 'for '.$sname.':'.$sdom);
1.35 matthew 2181: } else {
2182: $fullname = &ProcessFullName(@info{qw/lastname generation
2183: firstname middlename/});
2184: $id = $info{'id'};
2185: }
1.36 matthew 2186: # Update the classlist with this students information
2187: if ($fullname ne 'not available') {
2188: my $enrolldata = join(':',$end,$start,$id,$section,$fullname);
2189: my $reply=&Apache::lonnet::cput('classlist',
2190: {$student => $enrolldata},
2191: $cdom,$cnum);
2192: if ($reply !~ /^(ok|delayed)/) {
2193: &Apache::lonnet::logthis('Unable to update classlist for '.
2194: 'student '.$sname.':'.$sdom.
2195: ' error:'.$reply);
2196: }
2197: }
1.35 matthew 2198: }
2199: my $status='Expired';
2200: if(((!$end) || $now < $end) && ((!$start) || ($now > $start))) {
2201: $status='Active';
2202: }
2203: $classlist{$student} =
2204: [$sdom,$sname,$end,$start,$id,$section,$fullname,$status];
2205: }
2206: if (wantarray()) {
2207: return (\%classlist,['domain','username','end','start','id',
2208: 'section','fullname','status']);
2209: } else {
2210: return \%classlist;
2211: }
2212: }
2213:
1.1 stredwic 2214: # ----- END HELPER FUNCTIONS --------------------------------------------
2215:
2216: 1;
2217: __END__
1.36 matthew 2218:
1.35 matthew 2219:
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