Annotation of loncom/interface/loncoursedata.pm, revision 1.108
1.1 stredwic 1: # The LearningOnline Network with CAPA
2: #
1.108 ! matthew 3: # $Id: loncoursedata.pm,v 1.107 2003/10/27 21:07:22 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{$student})) {
1.106 matthew 1042: &Apache::lonmysql::store_row($student_table,
1043: [undef,$student,undef]);
1.57 matthew 1044: undef(%ids_by_student);
1045: my @Result = &Apache::lonmysql::get_rows($student_table);
1046: foreach (@Result) {
1047: $ids_by_student{$_->[1]}=$_->[0];
1048: }
1049: }
1050: return $ids_by_student{$student} if(exists( $ids_by_student{$student}));
1051: return undef; # error
1052: }
1053:
1054: sub get_student {
1055: my ($student_id) = @_;
1056: if (! exists($students_by_id{$student_id}) ||
1057: ! defined($students_by_id{$student_id}) ||
1058: $students_by_id{$student_id} eq '') {
1059: my @Result = &Apache::lonmysql::get_rows($student_table);
1060: foreach (@Result) {
1061: $students_by_id{$_->[0]}=$_->[1];
1062: }
1063: }
1064: return $students_by_id{$student_id} if(exists($students_by_id{$student_id}));
1065: return undef; # error
1066: }
1.99 matthew 1067:
1068: ################################################
1069: ################################################
1070:
1071: =pod
1072:
1073: =item &clear_internal_caches()
1074:
1075: Causes the internal caches used in get_student_id, get_student,
1076: get_symb_id, get_symb, get_part_id, and get_part to be undef'd.
1077:
1078: Needs to be called before the first operation with the MySQL database
1079: for a given Apache request.
1080:
1081: =cut
1082:
1083: ################################################
1084: ################################################
1085: sub clear_internal_caches {
1086: $have_read_part_table = 0;
1087: undef(%ids_by_part);
1088: undef(%parts_by_id);
1089: $have_read_symb_table = 0;
1090: undef(%ids_by_symb);
1091: undef(%symbs_by_id);
1092: $have_read_student_table = 0;
1093: undef(%ids_by_student);
1094: undef(%students_by_id);
1095: }
1096:
1.57 matthew 1097:
1098: ################################################
1099: ################################################
1100:
1101: =pod
1102:
1.89 matthew 1103: =item &update_full_student_data($sname,$sdom,$courseid)
1104:
1105: Does a lonnet::dump on a student to populate the courses tables.
1106:
1107: Input: $sname, $sdom, $courseid
1108:
1109: Output: $returnstatus
1110:
1111: $returnstatus is a string describing any errors that occured. 'okay' is the
1112: default.
1113:
1114: This subroutine loads a students data using lonnet::dump and inserts
1115: it into the MySQL database. The inserts are done on three tables,
1116: $fulldump_response_table, $fulldump_part_table, and $fulldump_timestamp_table.
1117: The INSERT calls are made directly by this subroutine, not through lonmysql
1118: because we do a 'bulk'insert which takes advantage of MySQLs non-SQL
1119: compliant INSERT command to insert multiple rows at a time.
1120: If anything has gone wrong during this process, $returnstatus is updated with
1121: a description of the error.
1122:
1123: Once the "fulldump" tables are updated, the tables used for chart and
1124: spreadsheet (which hold only the current state of the student on their
1125: homework, not historical data) are updated. If all updates have occured
1126: successfully, the studentdata table is updated to reflect the time of the
1127: update.
1128:
1129: Notice we do not insert the data and immediately query it. This means it
1130: is possible for there to be data returned this first time that is not
1131: available the second time. CYA.
1132:
1133: =cut
1134:
1135: ################################################
1136: ################################################
1137: sub update_full_student_data {
1138: my ($sname,$sdom,$courseid) = @_;
1139: #
1140: # Set up database names
1141: &setup_table_names($courseid);
1142: #
1143: my $student_id = &get_student_id($sname,$sdom);
1144: my $student = $sname.':'.$sdom;
1145: #
1146: my $returnstatus = 'okay';
1147: #
1148: # Download students data
1149: my $time_of_retrieval = time;
1150: my @tmp = &Apache::lonnet::dump($courseid,$sdom,$sname);
1151: if (@tmp && $tmp[0] =~ /^error/) {
1152: $returnstatus = 'error retrieving full student data';
1153: return $returnstatus;
1154: } elsif (! @tmp) {
1155: $returnstatus = 'okay: no student data';
1156: return $returnstatus;
1157: }
1158: my %studentdata = @tmp;
1159: #
1160: # Get database handle and clean out the tables
1161: my $dbh = &Apache::lonmysql::get_dbh();
1162: $dbh->do('DELETE FROM '.$fulldump_response_table.' WHERE student_id='.
1163: $student_id);
1164: $dbh->do('DELETE FROM '.$fulldump_part_table.' WHERE student_id='.
1165: $student_id);
1166: $dbh->do('DELETE FROM '.$fulldump_timestamp_table.' WHERE student_id='.
1167: $student_id);
1168: #
1169: # Parse and store the data into a form we can handle
1170: my $partdata;
1171: my $respdata;
1172: while (my ($key,$value) = each(%studentdata)) {
1173: next if ($key =~ /^(\d+):(resource$|subnum$|keys:)/);
1174: my ($transaction,$symb,$parameter) = split(':',$key);
1175: my $symb_id = &get_symb_id($symb);
1176: if ($parameter eq 'timestamp') {
1177: # We can deal with 'timestamp' right away
1178: my @timestamp_storage = ($symb_id,$student_id,
1179: $transaction,$value);
1.98 matthew 1180: my $store_command = 'INSERT IGNORE INTO '.$fulldump_timestamp_table.
1.89 matthew 1181: " VALUES ('".join("','",@timestamp_storage)."');";
1182: $dbh->do($store_command);
1183: if ($dbh->err()) {
1184: &Apache::lonnet::logthis('unable to execute '.$store_command);
1185: &Apache::lonnet::logthis($dbh->errstr());
1186: }
1187: next;
1188: } elsif ($parameter eq 'version') {
1189: next;
1.90 matthew 1190: } elsif ($parameter =~ /^resource\.(.*)\.(tries|
1191: award|
1192: awarded|
1193: previous|
1194: solved|
1195: awarddetail|
1196: submission|
1197: submissiongrading|
1198: molecule)\s*$/x){
1.89 matthew 1199: # we do not have enough information to store an
1200: # entire row, so we save it up until later.
1201: my ($part_and_resp_id,$field) = ($1,$2);
1202: my ($part,$part_id,$resp,$resp_id);
1203: if ($part_and_resp_id =~ /\./) {
1204: ($part,$resp) = split(/\./,$part_and_resp_id);
1205: $part_id = &get_part_id($part);
1206: $resp_id = &get_part_id($resp);
1207: } else {
1208: $part_id = &get_part_id($part_and_resp_id);
1209: }
1.90 matthew 1210: # Deal with part specific data
1.89 matthew 1211: if ($field =~ /^(tries|award|awarded|previous)$/) {
1212: $partdata->{$symb_id}->{$part_id}->{$transaction}->{$field}=$value;
1213: }
1.90 matthew 1214: # deal with response specific data
1.89 matthew 1215: if (defined($resp_id) &&
1.100 matthew 1216: $field =~ /^(awarddetail|
1.90 matthew 1217: submission|
1218: submissiongrading|
1219: molecule)$/x) {
1.89 matthew 1220: if ($field eq 'submission') {
1221: # We have to be careful with user supplied input.
1222: # most of the time we are okay because it is escaped.
1223: # However, there is one wrinkle: submissions which end in
1224: # and odd number of '\' cause insert errors to occur.
1225: # Best trap this somehow...
1.102 matthew 1226: $value =~ s/\'/\\\'/g;
1.89 matthew 1227: my ($offensive_string) = ($value =~ /(\\+)$/);
1228: if (length($offensive_string) % 2) {
1229: $value =~ s/\\$/\\\\/;
1230: }
1231: }
1.90 matthew 1232: if ($field eq 'submissiongrading' ||
1233: $field eq 'molecule') {
1234: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific'}=$field;
1235: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific_value'}=$value;
1236: } else {
1237: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{$field}=$value;
1238: }
1.89 matthew 1239: }
1240: }
1241: }
1242: ##
1243: ## Store the part data
1.98 matthew 1244: my $store_command = 'INSERT IGNORE INTO '.$fulldump_part_table.
1.89 matthew 1245: ' VALUES '."\n";
1246: my $store_rows = 0;
1247: while (my ($symb_id,$hash1) = each (%$partdata)) {
1248: while (my ($part_id,$hash2) = each (%$hash1)) {
1249: while (my ($transaction,$data) = each (%$hash2)) {
1250: $store_command .= "('".join("','",$symb_id,$part_id,
1251: $student_id,
1252: $transaction,
1.101 matthew 1253: $data->{'tries'},
1.89 matthew 1254: $data->{'award'},
1255: $data->{'awarded'},
1256: $data->{'previous'})."'),";
1257: $store_rows++;
1258: }
1259: }
1260: }
1261: if ($store_rows) {
1262: chop($store_command);
1263: $dbh->do($store_command);
1264: if ($dbh->err) {
1265: $returnstatus = 'error storing part data';
1266: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
1267: &Apache::lonnet::logthis("While attempting\n".$store_command);
1268: }
1269: }
1270: ##
1271: ## Store the response data
1.98 matthew 1272: $store_command = 'INSERT IGNORE INTO '.$fulldump_response_table.
1.89 matthew 1273: ' VALUES '."\n";
1274: $store_rows = 0;
1275: while (my ($symb_id,$hash1) = each (%$respdata)) {
1276: while (my ($part_id,$hash2) = each (%$hash1)) {
1277: while (my ($resp_id,$hash3) = each (%$hash2)) {
1278: while (my ($transaction,$data) = each (%$hash3)) {
1279: $store_command .= "('".join("','",$symb_id,$part_id,
1280: $resp_id,$student_id,
1281: $transaction,
1282: $data->{'awarddetail'},
1.90 matthew 1283: $data->{'response_specific'},
1284: $data->{'response_specific_value'},
1.89 matthew 1285: $data->{'submission'})."'),";
1286: $store_rows++;
1287: }
1288: }
1289: }
1290: }
1291: if ($store_rows) {
1292: chop($store_command);
1293: $dbh->do($store_command);
1294: if ($dbh->err) {
1295: $returnstatus = 'error storing response data';
1296: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
1297: &Apache::lonnet::logthis("While attempting\n".$store_command);
1298: }
1299: }
1300: ##
1301: ## Update the students "current" data in the performance
1302: ## and parameters tables.
1303: my ($status,undef) = &store_student_data
1304: ($sname,$sdom,$courseid,
1305: &Apache::lonnet::convert_dump_to_currentdump(\%studentdata));
1306: if ($returnstatus eq 'okay' && $status ne 'okay') {
1307: $returnstatus = 'error storing current data:'.$status;
1308: } elsif ($status ne 'okay') {
1309: $returnstatus .= ' error storing current data:'.$status;
1310: }
1311: ##
1312: ## Update the students time......
1313: if ($returnstatus eq 'okay') {
1314: &Apache::lonmysql::replace_row
1315: ($studentdata_table,
1316: [$student_id,$time_of_retrieval,$time_of_retrieval,undef,undef]);
1317: }
1318: return $returnstatus;
1319: }
1320:
1321: ################################################
1322: ################################################
1323:
1324: =pod
1325:
1.57 matthew 1326: =item &update_student_data()
1327:
1328: Input: $sname, $sdom, $courseid
1329:
1330: Output: $returnstatus, \%student_data
1331:
1332: $returnstatus is a string describing any errors that occured. 'okay' is the
1333: default.
1334: \%student_data is the data returned by a call to lonnet::currentdump.
1335:
1336: This subroutine loads a students data using lonnet::currentdump and inserts
1337: it into the MySQL database. The inserts are done on two tables,
1338: $performance_table and $parameters_table. $parameters_table holds the data
1339: that is not included in $performance_table. See the description of
1340: $performance_table elsewhere in this file. The INSERT calls are made
1341: directly by this subroutine, not through lonmysql because we do a 'bulk'
1342: insert which takes advantage of MySQLs non-SQL compliant INSERT command to
1343: insert multiple rows at a time. If anything has gone wrong during this
1344: process, $returnstatus is updated with a description of the error and
1345: \%student_data is returned.
1346:
1347: Notice we do not insert the data and immediately query it. This means it
1348: is possible for there to be data returned this first time that is not
1349: available the second time. CYA.
1350:
1351: =cut
1352:
1353: ################################################
1354: ################################################
1355: sub update_student_data {
1356: my ($sname,$sdom,$courseid) = @_;
1357: #
1.60 matthew 1358: # Set up database names
1359: &setup_table_names($courseid);
1360: #
1.57 matthew 1361: my $student_id = &get_student_id($sname,$sdom);
1362: my $student = $sname.':'.$sdom;
1363: #
1364: my $returnstatus = 'okay';
1365: #
1366: # Download students data
1367: my $time_of_retrieval = time;
1368: my @tmp = &Apache::lonnet::currentdump($courseid,$sdom,$sname);
1369: if ((scalar(@tmp) > 0) && ($tmp[0] =~ /^error:/)) {
1370: &Apache::lonnet::logthis('error getting data for '.
1371: $sname.':'.$sdom.' in course '.$courseid.
1372: ':'.$tmp[0]);
1373: $returnstatus = 'error getting data';
1.79 matthew 1374: return ($returnstatus,undef);
1.57 matthew 1375: }
1376: if (scalar(@tmp) < 1) {
1377: return ('no data',undef);
1378: }
1379: my %student_data = @tmp;
1.89 matthew 1380: my @Results = &store_student_data($sname,$sdom,$courseid,\%student_data);
1381: #
1382: # Set the students update time
1.96 matthew 1383: if ($Results[0] eq 'okay') {
1.95 matthew 1384: &Apache::lonmysql::replace_row($studentdata_table,
1.89 matthew 1385: [$student_id,$time_of_retrieval,undef,undef,undef]);
1.95 matthew 1386: }
1.89 matthew 1387: #
1388: return @Results;
1389: }
1390:
1391: sub store_student_data {
1392: my ($sname,$sdom,$courseid,$student_data) = @_;
1393: #
1394: my $student_id = &get_student_id($sname,$sdom);
1395: my $student = $sname.':'.$sdom;
1396: #
1397: my $returnstatus = 'okay';
1.57 matthew 1398: #
1399: # Remove all of the students data from the table
1.60 matthew 1400: my $dbh = &Apache::lonmysql::get_dbh();
1401: $dbh->do('DELETE FROM '.$performance_table.' WHERE student_id='.
1402: $student_id);
1403: $dbh->do('DELETE FROM '.$parameters_table.' WHERE student_id='.
1404: $student_id);
1.57 matthew 1405: #
1406: # Store away the data
1407: #
1408: my $starttime = Time::HiRes::time;
1409: my $elapsed = 0;
1410: my $rows_stored;
1.98 matthew 1411: my $store_parameters_command = 'INSERT IGNORE INTO '.$parameters_table.
1.60 matthew 1412: ' VALUES '."\n";
1.61 matthew 1413: my $num_parameters = 0;
1.98 matthew 1414: my $store_performance_command = 'INSERT IGNORE INTO '.$performance_table.
1.60 matthew 1415: ' VALUES '."\n";
1.79 matthew 1416: return ('error',undef) if (! defined($dbh));
1.89 matthew 1417: while (my ($current_symb,$param_hash) = each(%{$student_data})) {
1.57 matthew 1418: #
1419: # make sure the symb is set up properly
1420: my $symb_id = &get_symb_id($current_symb);
1421: #
1422: # Load data into the tables
1.63 matthew 1423: while (my ($parameter,$value) = each(%$param_hash)) {
1.57 matthew 1424: my $newstring;
1.63 matthew 1425: if ($parameter !~ /(timestamp|resource\.(.*)\.(solved|tries|awarded|award|awarddetail|previous))/) {
1.57 matthew 1426: $newstring = "('".join("','",
1427: $symb_id,$student_id,
1.69 matthew 1428: $parameter)."',".
1429: $dbh->quote($value)."),\n";
1.61 matthew 1430: $num_parameters ++;
1.57 matthew 1431: if ($newstring !~ /''/) {
1432: $store_parameters_command .= $newstring;
1433: $rows_stored++;
1434: }
1435: }
1436: next if ($parameter !~ /^resource\.(.*)\.solved$/);
1437: #
1438: my $part = $1;
1439: my $part_id = &get_part_id($part);
1440: next if (!defined($part_id));
1441: my $solved = $value;
1442: my $tries = $param_hash->{'resource.'.$part.'.tries'};
1443: my $awarded = $param_hash->{'resource.'.$part.'.awarded'};
1444: my $award = $param_hash->{'resource.'.$part.'.award'};
1445: my $awarddetail = $param_hash->{'resource.'.$part.'.awarddetail'};
1446: my $timestamp = $param_hash->{'timestamp'};
1.60 matthew 1447: #
1.74 matthew 1448: $solved = '' if (! defined($solved));
1.57 matthew 1449: $tries = '' if (! defined($tries));
1450: $awarded = '' if (! defined($awarded));
1451: $award = '' if (! defined($award));
1452: $awarddetail = '' if (! defined($awarddetail));
1.73 matthew 1453: $newstring = "('".join("','",$symb_id,$student_id,$part_id,$part,
1.57 matthew 1454: $solved,$tries,$awarded,$award,
1.63 matthew 1455: $awarddetail,$timestamp)."'),\n";
1.57 matthew 1456: $store_performance_command .= $newstring;
1457: $rows_stored++;
1458: }
1459: }
1460: chop $store_parameters_command;
1.60 matthew 1461: chop $store_parameters_command;
1462: chop $store_performance_command;
1.57 matthew 1463: chop $store_performance_command;
1464: my $start = Time::HiRes::time;
1.94 matthew 1465: $dbh->do($store_performance_command);
1466: if ($dbh->err()) {
1467: &Apache::lonnet::logthis(' bigass insert error:'.$dbh->errstr());
1468: &Apache::lonnet::logthis('command = '.$store_performance_command);
1469: $returnstatus = 'error: unable to insert performance into database';
1470: return ($returnstatus,$student_data);
1471: }
1.61 matthew 1472: $dbh->do($store_parameters_command) if ($num_parameters>0);
1.57 matthew 1473: if ($dbh->err()) {
1474: &Apache::lonnet::logthis(' bigass insert error:'.$dbh->errstr());
1.61 matthew 1475: &Apache::lonnet::logthis('command = '.$store_parameters_command);
1.87 matthew 1476: &Apache::lonnet::logthis('rows_stored = '.$rows_stored);
1477: &Apache::lonnet::logthis('student_id = '.$student_id);
1.57 matthew 1478: $returnstatus = 'error: unable to insert parameters into database';
1.89 matthew 1479: return ($returnstatus,$student_data);
1.57 matthew 1480: }
1481: $elapsed += Time::HiRes::time - $start;
1.89 matthew 1482: return ($returnstatus,$student_data);
1.57 matthew 1483: }
1484:
1.89 matthew 1485: ######################################
1486: ######################################
1.57 matthew 1487:
1488: =pod
1489:
1.89 matthew 1490: =item &ensure_tables_are_set_up($courseid)
1.57 matthew 1491:
1.89 matthew 1492: Checks to be sure the MySQL tables for the given class are set up.
1493: If $courseid is omitted it will be obtained from the environment.
1.57 matthew 1494:
1.89 matthew 1495: Returns nothing on success and 'error' on failure
1.57 matthew 1496:
1497: =cut
1498:
1.89 matthew 1499: ######################################
1500: ######################################
1501: sub ensure_tables_are_set_up {
1502: my ($courseid) = @_;
1.61 matthew 1503: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1504: #
1505: # Clean out package variables
1.57 matthew 1506: &setup_table_names($courseid);
1507: #
1508: # if the tables do not exist, make them
1509: my @CurrentTable = &Apache::lonmysql::tables_in_db();
1.87 matthew 1510: my ($found_symb,$found_student,$found_part,$found_studentdata,
1.89 matthew 1511: $found_performance,$found_parameters,$found_fulldump_part,
1512: $found_fulldump_response,$found_fulldump_timestamp);
1.57 matthew 1513: foreach (@CurrentTable) {
1514: $found_symb = 1 if ($_ eq $symb_table);
1515: $found_student = 1 if ($_ eq $student_table);
1516: $found_part = 1 if ($_ eq $part_table);
1.87 matthew 1517: $found_studentdata = 1 if ($_ eq $studentdata_table);
1.57 matthew 1518: $found_performance = 1 if ($_ eq $performance_table);
1519: $found_parameters = 1 if ($_ eq $parameters_table);
1.89 matthew 1520: $found_fulldump_part = 1 if ($_ eq $fulldump_part_table);
1521: $found_fulldump_response = 1 if ($_ eq $fulldump_response_table);
1522: $found_fulldump_timestamp = 1 if ($_ eq $fulldump_timestamp_table);
1.57 matthew 1523: }
1.87 matthew 1524: if (!$found_symb || !$found_studentdata ||
1.57 matthew 1525: !$found_student || !$found_part ||
1.89 matthew 1526: !$found_performance || !$found_parameters ||
1527: !$found_fulldump_part || !$found_fulldump_response ||
1528: !$found_fulldump_timestamp ) {
1.57 matthew 1529: if (&init_dbs($courseid)) {
1.89 matthew 1530: return 'error';
1.57 matthew 1531: }
1532: }
1.89 matthew 1533: }
1534:
1535: ################################################
1536: ################################################
1537:
1538: =pod
1539:
1540: =item &ensure_current_data()
1541:
1542: Input: $sname, $sdom, $courseid
1543:
1544: Output: $status, $data
1545:
1546: This routine ensures the data for a given student is up to date.
1547: The $studentdata_table is queried to determine the time of the last update.
1548: If the students data is out of date, &update_student_data() is called.
1549: The return values from the call to &update_student_data() are returned.
1550:
1551: =cut
1552:
1553: ################################################
1554: ################################################
1555: sub ensure_current_data {
1556: my ($sname,$sdom,$courseid) = @_;
1557: my $status = 'okay'; # return value
1558: #
1559: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1560: &ensure_tables_are_set_up($courseid);
1.57 matthew 1561: #
1562: # Get the update time for the user
1563: my $updatetime = 0;
1.60 matthew 1564: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1565: ($sdom,$sname,$courseid.'.db',
1566: $Apache::lonnet::perlvar{'lonUsersDir'});
1.57 matthew 1567: #
1.87 matthew 1568: my $student_id = &get_student_id($sname,$sdom);
1569: my @Result = &Apache::lonmysql::get_rows($studentdata_table,
1570: "student_id ='$student_id'");
1.57 matthew 1571: my $data = undef;
1572: if (@Result) {
1573: $updatetime = $Result[0]->[1];
1574: }
1575: if ($modifiedtime > $updatetime) {
1576: ($status,$data) = &update_student_data($sname,$sdom,$courseid);
1577: }
1578: return ($status,$data);
1579: }
1580:
1581: ################################################
1582: ################################################
1583:
1584: =pod
1585:
1.89 matthew 1586: =item &ensure_current_full_data($sname,$sdom,$courseid)
1587:
1588: Input: $sname, $sdom, $courseid
1589:
1590: Output: $status
1591:
1592: This routine ensures the fulldata (the data from a lonnet::dump, not a
1593: lonnet::currentdump) for a given student is up to date.
1594: The $studentdata_table is queried to determine the time of the last update.
1595: If the students fulldata is out of date, &update_full_student_data() is
1596: called.
1597:
1598: The return value from the call to &update_full_student_data() is returned.
1599:
1600: =cut
1601:
1602: ################################################
1603: ################################################
1604: sub ensure_current_full_data {
1605: my ($sname,$sdom,$courseid) = @_;
1606: my $status = 'okay'; # return value
1607: #
1608: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1609: &ensure_tables_are_set_up($courseid);
1610: #
1611: # Get the update time for the user
1612: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1613: ($sdom,$sname,$courseid.'.db',
1614: $Apache::lonnet::perlvar{'lonUsersDir'});
1615: #
1616: my $student_id = &get_student_id($sname,$sdom);
1617: my @Result = &Apache::lonmysql::get_rows($studentdata_table,
1618: "student_id ='$student_id'");
1619: my $updatetime;
1620: if (@Result && ref($Result[0]) eq 'ARRAY') {
1621: $updatetime = $Result[0]->[2];
1622: }
1623: if (! defined($updatetime) || $modifiedtime > $updatetime) {
1624: $status = &update_full_student_data($sname,$sdom,$courseid);
1625: }
1626: return $status;
1627: }
1628:
1629: ################################################
1630: ################################################
1631:
1632: =pod
1633:
1.57 matthew 1634: =item &get_student_data_from_performance_cache()
1635:
1636: Input: $sname, $sdom, $symb, $courseid
1637:
1638: Output: hash reference containing the data for the given student.
1639: If $symb is undef, all the students data is returned.
1640:
1641: This routine is the heart of the local caching system. See the description
1642: of $performance_table, $symb_table, $student_table, and $part_table. The
1643: main task is building the MySQL request. The tables appear in the request
1644: in the order in which they should be parsed by MySQL. When searching
1645: on a student the $student_table is used to locate the 'student_id'. All
1646: rows in $performance_table which have a matching 'student_id' are returned,
1647: with data from $part_table and $symb_table which match the entries in
1648: $performance_table, 'part_id' and 'symb_id'. When searching on a symb,
1649: the $symb_table is processed first, with matching rows grabbed from
1650: $performance_table and filled in from $part_table and $student_table in
1651: that order.
1652:
1653: Running 'EXPLAIN ' on the 'SELECT' statements generated can be quite
1654: interesting, especially if you play with the order the tables are listed.
1655:
1656: =cut
1657:
1658: ################################################
1659: ################################################
1660: sub get_student_data_from_performance_cache {
1661: my ($sname,$sdom,$symb,$courseid)=@_;
1662: my $student = $sname.':'.$sdom if (defined($sname) && defined($sdom));
1.61 matthew 1663: &setup_table_names($courseid);
1.57 matthew 1664: #
1665: # Return hash
1666: my $studentdata;
1667: #
1668: my $dbh = &Apache::lonmysql::get_dbh();
1669: my $request = "SELECT ".
1.73 matthew 1670: "d.symb,a.part,a.solved,a.tries,a.awarded,a.award,a.awarddetail,".
1.63 matthew 1671: "a.timestamp ";
1.57 matthew 1672: if (defined($student)) {
1673: $request .= "FROM $student_table AS b ".
1674: "LEFT JOIN $performance_table AS a ON b.student_id=a.student_id ".
1.73 matthew 1675: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1.57 matthew 1676: "LEFT JOIN $symb_table AS d ON d.symb_id = a.symb_id ".
1677: "WHERE student='$student'";
1678: if (defined($symb) && $symb ne '') {
1.67 matthew 1679: $request .= " AND d.symb=".$dbh->quote($symb);
1.57 matthew 1680: }
1681: } elsif (defined($symb) && $symb ne '') {
1682: $request .= "FROM $symb_table as d ".
1683: "LEFT JOIN $performance_table AS a ON d.symb_id=a.symb_id ".
1.73 matthew 1684: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1.57 matthew 1685: "LEFT JOIN $student_table AS b ON b.student_id = a.student_id ".
1686: "WHERE symb='".$dbh->quote($symb)."'";
1687: }
1688: my $starttime = Time::HiRes::time;
1689: my $rows_retrieved = 0;
1690: my $sth = $dbh->prepare($request);
1691: $sth->execute();
1692: if ($sth->err()) {
1693: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1694: &Apache::lonnet::logthis("\n".$request."\n");
1695: &Apache::lonnet::logthis("error is:".$sth->errstr());
1696: return undef;
1697: }
1698: foreach my $row (@{$sth->fetchall_arrayref}) {
1699: $rows_retrieved++;
1.63 matthew 1700: my ($symb,$part,$solved,$tries,$awarded,$award,$awarddetail,$time) =
1.57 matthew 1701: (@$row);
1702: my $base = 'resource.'.$part;
1703: $studentdata->{$symb}->{$base.'.solved'} = $solved;
1704: $studentdata->{$symb}->{$base.'.tries'} = $tries;
1705: $studentdata->{$symb}->{$base.'.awarded'} = $awarded;
1706: $studentdata->{$symb}->{$base.'.award'} = $award;
1707: $studentdata->{$symb}->{$base.'.awarddetail'} = $awarddetail;
1708: $studentdata->{$symb}->{'timestamp'} = $time if (defined($time) && $time ne '');
1.67 matthew 1709: }
1.97 matthew 1710: ## Get misc parameters
1711: $request = 'SELECT c.symb,a.parameter,a.value '.
1712: "FROM $student_table AS b ".
1713: "LEFT JOIN $parameters_table AS a ON b.student_id=a.student_id ".
1714: "LEFT JOIN $symb_table AS c ON c.symb_id = a.symb_id ".
1715: "WHERE student='$student'";
1716: if (defined($symb) && $symb ne '') {
1717: $request .= " AND c.symb=".$dbh->quote($symb);
1718: }
1719: $sth = $dbh->prepare($request);
1720: $sth->execute();
1721: if ($sth->err()) {
1722: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1723: &Apache::lonnet::logthis("\n".$request."\n");
1724: &Apache::lonnet::logthis("error is:".$sth->errstr());
1725: if (defined($symb) && $symb ne '') {
1726: $studentdata = $studentdata->{$symb};
1727: }
1728: return $studentdata;
1729: }
1730: #
1731: foreach my $row (@{$sth->fetchall_arrayref}) {
1732: $rows_retrieved++;
1733: my ($symb,$parameter,$value) = (@$row);
1734: $studentdata->{$symb}->{$parameter} = $value;
1735: }
1736: #
1.67 matthew 1737: if (defined($symb) && $symb ne '') {
1738: $studentdata = $studentdata->{$symb};
1.57 matthew 1739: }
1740: return $studentdata;
1741: }
1742:
1743: ################################################
1744: ################################################
1745:
1746: =pod
1747:
1748: =item &get_current_state()
1749:
1750: Input: $sname,$sdom,$symb,$courseid
1751:
1752: Output: Described below
1.46 matthew 1753:
1.47 matthew 1754: Retrieve the current status of a students performance. $sname and
1.46 matthew 1755: $sdom are the only required parameters. If $symb is undef the results
1.47 matthew 1756: of an &Apache::lonnet::currentdump() will be returned.
1.46 matthew 1757: If $courseid is undef it will be retrieved from the environment.
1758:
1759: The return structure is based on &Apache::lonnet::currentdump. If
1760: $symb is unspecified, all the students data is returned in a hash of
1761: the form:
1762: (
1763: symb1 => { param1 => value1, param2 => value2 ... },
1764: symb2 => { param1 => value1, param2 => value2 ... },
1765: )
1766:
1767: If $symb is specified, a hash of
1768: (
1769: param1 => value1,
1770: param2 => value2,
1771: )
1772: is returned.
1773:
1.57 matthew 1774: If no data is found for $symb, or if the student has no performance data,
1.46 matthew 1775: an empty list is returned.
1776:
1777: =cut
1778:
1779: ################################################
1780: ################################################
1781: sub get_current_state {
1.47 matthew 1782: my ($sname,$sdom,$symb,$courseid,$forcedownload)=@_;
1783: #
1.46 matthew 1784: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1.47 matthew 1785: #
1.61 matthew 1786: return () if (! defined($sname) || ! defined($sdom));
1787: #
1.57 matthew 1788: my ($status,$data) = &ensure_current_data($sname,$sdom,$courseid);
1.77 matthew 1789: # &Apache::lonnet::logthis
1790: # ('sname = '.$sname.
1791: # ' domain = '.$sdom.
1792: # ' status = '.$status.
1793: # ' data is '.(defined($data)?'defined':'undefined'));
1.73 matthew 1794: # while (my ($symb,$hash) = each(%$data)) {
1795: # &Apache::lonnet::logthis($symb."\n----------------------------------");
1796: # while (my ($key,$value) = each (%$hash)) {
1797: # &Apache::lonnet::logthis(" ".$key." = ".$value);
1798: # }
1799: # }
1.47 matthew 1800: #
1.79 matthew 1801: if (defined($data) && defined($symb) && ref($data->{$symb})) {
1802: return %{$data->{$symb}};
1803: } elsif (defined($data) && ! defined($symb) && ref($data)) {
1804: return %$data;
1805: }
1806: if ($status eq 'no data') {
1.57 matthew 1807: return ();
1808: } else {
1809: if ($status ne 'okay' && $status ne '') {
1810: &Apache::lonnet::logthis('status = '.$status);
1.47 matthew 1811: return ();
1812: }
1.57 matthew 1813: my $returnhash = &get_student_data_from_performance_cache($sname,$sdom,
1814: $symb,$courseid);
1815: return %$returnhash if (defined($returnhash));
1.46 matthew 1816: }
1.57 matthew 1817: return ();
1.61 matthew 1818: }
1819:
1820: ################################################
1821: ################################################
1822:
1823: =pod
1824:
1825: =item &get_problem_statistics()
1826:
1827: Gather data on a given problem. The database is assumed to be
1828: populated and all local caching variables are assumed to be set
1829: properly. This means you need to call &ensure_current_data for
1830: the students you are concerned with prior to calling this routine.
1831:
1832: Inputs: $students, $symb, $part, $courseid
1833:
1.64 matthew 1834: =over 4
1835:
1836: =item $students is an array of hash references.
1837: Each hash must contain at least the 'username' and 'domain' of a student.
1838:
1839: =item $symb is the symb for the problem.
1840:
1841: =item $part is the part id you need statistics for
1842:
1843: =item $courseid is the course id, of course!
1844:
1845: =back
1846:
1.66 matthew 1847: Outputs: See the code for up to date information. A hash reference is
1848: returned. The hash has the following keys defined:
1.64 matthew 1849:
1850: =over 4
1851:
1.66 matthew 1852: =item num_students The number of students attempting the problem
1853:
1854: =item tries The total number of tries for the students
1855:
1856: =item max_tries The maximum number of tries taken
1857:
1858: =item mean_tries The average number of tries
1859:
1860: =item num_solved The number of students able to solve the problem
1861:
1862: =item num_override The number of students whose answer is 'correct_by_override'
1863:
1864: =item deg_of_diff The degree of difficulty of the problem
1865:
1866: =item std_tries The standard deviation of the number of tries
1867:
1868: =item skew_tries The skew of the number of tries
1.64 matthew 1869:
1.66 matthew 1870: =item per_wrong The number of students attempting the problem who were not
1871: able to answer it correctly.
1.64 matthew 1872:
1873: =back
1874:
1.61 matthew 1875: =cut
1876:
1877: ################################################
1878: ################################################
1879: sub get_problem_statistics {
1880: my ($students,$symb,$part,$courseid) = @_;
1881: return if (! defined($symb) || ! defined($part));
1882: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1883: #
1.100 matthew 1884: &setup_table_names($courseid);
1.61 matthew 1885: my $symb_id = &get_symb_id($symb);
1886: my $part_id = &get_part_id($part);
1887: my $stats_table = $courseid.'_problem_stats';
1888: #
1889: my $dbh = &Apache::lonmysql::get_dbh();
1890: return undef if (! defined($dbh));
1891: #
1892: # A) Number of Students attempting problem
1893: # B) Total number of tries of students attempting problem
1894: # C) Mod (largest number of tries for solving the problem)
1895: # D) Mean (average number of tries for solving the problem)
1896: # E) Number of students to solve the problem
1897: # F) Number of students to solve the problem by override
1898: # G) Number of students unable to solve the problem
1899: # H) Degree of difficulty : 1-(E+F)/B
1900: # I) Standard deviation of number of tries
1901: # J) Skew of tries: sqrt(sum(Xi-D)^3)/A
1902: #
1903: $dbh->do('DROP TABLE '.$stats_table); # May return an error
1904: my $request =
1905: 'CREATE TEMPORARY TABLE '.$stats_table.
1906: ' SELECT student_id,solved,award,tries FROM '.$performance_table.
1907: ' WHERE symb_id='.$symb_id.' AND part_id='.$part_id;
1.64 matthew 1908: if (defined($students)) {
1909: $request .= ' AND ('.
1910: join(' OR ', map {'student_id='.
1911: &get_student_id($_->{'username'},
1912: $_->{'domain'})
1913: } @$students
1914: ).')';
1915: }
1.61 matthew 1916: # &Apache::lonnet::logthis($request);
1917: $dbh->do($request);
1918: my ($num,$tries,$mod,$mean,$STD) = &execute_SQL_request
1919: ($dbh,
1920: 'SELECT COUNT(*),SUM(tries),MAX(tries),AVG(tries),STD(tries) FROM '.
1921: $stats_table);
1922: my ($Solved) = &execute_SQL_request($dbh,'SELECT COUNT(tries) FROM '.
1923: $stats_table.
1.92 matthew 1924: " WHERE solved='correct_by_student' OR solved='correct_by_scantron'");
1.61 matthew 1925: my ($solved) = &execute_SQL_request($dbh,'SELECT COUNT(tries) FROM '.
1926: $stats_table.
1927: " WHERE solved='correct_by_override'");
1928: $num = 0 if (! defined($num));
1929: $tries = 0 if (! defined($tries));
1930: $mod = 0 if (! defined($mod));
1931: $STD = 0 if (! defined($STD));
1932: $Solved = 0 if (! defined($Solved));
1933: $solved = 0 if (! defined($solved));
1934: #
1935: my $DegOfDiff = 'nan';
1.66 matthew 1936: $DegOfDiff = 1-($Solved)/$tries if ($tries>0);
1.61 matthew 1937:
1938: my $SKEW = 'nan';
1.66 matthew 1939: my $wrongpercent = 0;
1.61 matthew 1940: if ($num > 0) {
1941: ($SKEW) = &execute_SQL_request($dbh,'SELECT SQRT(SUM('.
1942: 'POWER(tries - '.$STD.',3)'.
1943: '))/'.$num.' FROM '.$stats_table);
1.66 matthew 1944: $wrongpercent=int(10*100*($num-$Solved+$solved)/$num)/10;
1.61 matthew 1945: }
1946: #
1947: $dbh->do('DROP TABLE '.$stats_table); # May return an error
1.81 matthew 1948: #
1949: # Store in metadata
1950: #
1.80 www 1951: if ($num) {
1952: my %storestats=();
1953:
1.86 www 1954: my $urlres=(&Apache::lonnet::decode_symb($symb))[2];
1.80 www 1955:
1956: $storestats{$courseid.'___'.$urlres.'___timestamp'}=time;
1957: $storestats{$courseid.'___'.$urlres.'___stdno'}=$num;
1958: $storestats{$courseid.'___'.$urlres.'___avetries'}=$mean;
1959: $storestats{$courseid.'___'.$urlres.'___difficulty'}=$DegOfDiff;
1960:
1961: $urlres=~/^(\w+)\/(\w+)/;
1962: &Apache::lonnet::put('nohist_resevaldata',\%storestats,$1,$2);
1963: }
1.81 matthew 1964: #
1965: # Return result
1966: #
1.66 matthew 1967: return { num_students => $num,
1968: tries => $tries,
1969: max_tries => $mod,
1970: mean_tries => $mean,
1971: std_tries => $STD,
1972: skew_tries => $SKEW,
1973: num_solved => $Solved,
1974: num_override => $solved,
1975: per_wrong => $wrongpercent,
1.81 matthew 1976: deg_of_diff => $DegOfDiff };
1.61 matthew 1977: }
1978:
1979: sub execute_SQL_request {
1980: my ($dbh,$request)=@_;
1981: # &Apache::lonnet::logthis($request);
1982: my $sth = $dbh->prepare($request);
1983: $sth->execute();
1984: my $row = $sth->fetchrow_arrayref();
1985: if (ref($row) eq 'ARRAY' && scalar(@$row)>0) {
1986: return @$row;
1987: }
1988: return ();
1989: }
1990:
1.105 matthew 1991: sub get_student_data {
1992: my ($students,$courseid) = @_;
1993: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1994: &setup_table_names($courseid);
1995: my $dbh = &Apache::lonmysql::get_dbh();
1996: return undef if (! defined($dbh));
1997: my $request = 'SELECT '.
1998: 'student_id, student '.
1999: 'FROM '.$student_table;
2000: if (defined($students)) {
2001: $request .= ' WHERE ('.
2002: join(' OR ', map {'student_id='.
2003: &get_student_id($_->{'username'},
2004: $_->{'domain'})
2005: } @$students
2006: ).')';
2007: }
2008: $request.= ' ORDER BY student_id';
2009: my $sth = $dbh->prepare($request);
2010: $sth->execute();
2011: if ($dbh->err) {
2012: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2013: return undef;
2014: }
2015: my $dataset = $sth->fetchall_arrayref();
2016: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2017: return $dataset;
2018: }
2019: }
2020:
1.108 ! matthew 2021: sub RD_student_id { return 0; }
! 2022: sub RD_awarddetail { return 1; }
! 2023: sub RD_response_eval { return 2; }
! 2024: sub RD_submission { return 3; }
! 2025: sub RD_timestamp { return 4; }
! 2026: sub RD_tries { return 5; }
! 2027: sub RD_sname { return 6; }
! 2028:
! 2029: sub get_response_data {
1.100 matthew 2030: my ($students,$symb,$response,$courseid) = @_;
1.103 matthew 2031: return undef if (! defined($symb) ||
1.100 matthew 2032: ! defined($response));
2033: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2034: #
2035: &setup_table_names($courseid);
2036: my $symb_id = &get_symb_id($symb);
2037: my $response_id = &get_part_id($response);
2038: #
2039: my $dbh = &Apache::lonmysql::get_dbh();
2040: return undef if (! defined($dbh));
2041: my $request = 'SELECT '.
1.105 matthew 2042: 'a.student_id, a.awarddetail, a.response_specific_value, '.
1.108 ! matthew 2043: 'a.submission, b.timestamp, c.tries, d.student '.
1.100 matthew 2044: 'FROM '.$fulldump_response_table.' AS a '.
2045: 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2046: 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2047: 'a.transaction = b.transaction '.
2048: 'LEFT JOIN '.$fulldump_part_table.' AS c '.
2049: 'ON a.symb_id=c.symb_id AND a.student_id=c.student_id AND '.
2050: 'a.part_id=c.part_id AND a.transaction = c.transaction '.
1.108 ! matthew 2051: 'LEFT JOIN '.$student_table.' AS d '.
! 2052: 'ON a.student_id=d.student_id '.
1.100 matthew 2053: 'WHERE '.
2054: 'a.symb_id='.$symb_id.' AND a.response_id='.$response_id;
2055: if (defined($students)) {
2056: $request .= ' AND ('.
1.103 matthew 2057: join(' OR ', map {'a.student_id='.
1.100 matthew 2058: &get_student_id($_->{'username'},
2059: $_->{'domain'})
2060: } @$students
2061: ).')';
2062: }
2063: $request .= ' ORDER BY b.timestamp';
1.103 matthew 2064: # &Apache::lonnet::logthis("request =\n".$request);
1.100 matthew 2065: my $sth = $dbh->prepare($request);
2066: $sth->execute();
1.105 matthew 2067: if ($dbh->err) {
2068: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2069: return undef;
2070: }
1.100 matthew 2071: my $dataset = $sth->fetchall_arrayref();
2072: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
1.103 matthew 2073: return $dataset;
1.100 matthew 2074: }
1.106 matthew 2075: }
1.108 ! matthew 2076:
! 2077: sub RT_student_id { return 0; }
! 2078: sub RT_awarded { return 1; }
! 2079: sub RT_tries { return 2; }
! 2080: sub RT_timestamp { return 3; }
1.106 matthew 2081:
2082: sub get_response_time_data {
1.107 matthew 2083: my ($students,$symb,$part,$courseid) = @_;
1.106 matthew 2084: return undef if (! defined($symb) ||
1.107 matthew 2085: ! defined($part));
1.106 matthew 2086: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2087: #
2088: &setup_table_names($courseid);
2089: my $symb_id = &get_symb_id($symb);
1.107 matthew 2090: my $part_id = &get_part_id($part);
1.106 matthew 2091: #
2092: my $dbh = &Apache::lonmysql::get_dbh();
2093: return undef if (! defined($dbh));
2094: my $request = 'SELECT '.
1.107 matthew 2095: 'a.student_id, a.awarded, a.tries, b.timestamp '.
2096: 'FROM '.$fulldump_part_table.' AS a '.
1.106 matthew 2097: 'NATURAL LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2098: # 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2099: # 'a.transaction = b.transaction '.
2100: 'WHERE '.
1.107 matthew 2101: 'a.symb_id='.$symb_id.' AND a.part_id='.$part_id;
1.106 matthew 2102: if (defined($students)) {
2103: $request .= ' AND ('.
2104: join(' OR ', map {'a.student_id='.
2105: &get_student_id($_->{'username'},
2106: $_->{'domain'})
2107: } @$students
2108: ).')';
2109: }
2110: $request .= ' ORDER BY b.timestamp';
2111: # &Apache::lonnet::logthis("request =\n".$request);
2112: my $sth = $dbh->prepare($request);
2113: $sth->execute();
2114: if ($dbh->err) {
2115: &Apache::lonnet::logthis('error = '.$dbh->errstr());
2116: return undef;
2117: }
2118: my $dataset = $sth->fetchall_arrayref();
2119: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2120: return $dataset;
2121: }
2122:
1.100 matthew 2123: }
1.61 matthew 2124:
2125: ################################################
2126: ################################################
2127:
2128: =pod
2129:
2130: =item &setup_table_names()
2131:
2132: input: course id
2133:
2134: output: none
2135:
2136: Cleans up the package variables for local caching.
2137:
2138: =cut
2139:
2140: ################################################
2141: ################################################
2142: sub setup_table_names {
2143: my ($courseid) = @_;
2144: if (! defined($courseid)) {
2145: $courseid = $ENV{'request.course.id'};
2146: }
2147: #
2148: if (! defined($current_course) || $current_course ne $courseid) {
2149: # Clear out variables
2150: $have_read_part_table = 0;
2151: undef(%ids_by_part);
2152: undef(%parts_by_id);
2153: $have_read_symb_table = 0;
2154: undef(%ids_by_symb);
2155: undef(%symbs_by_id);
2156: $have_read_student_table = 0;
2157: undef(%ids_by_student);
2158: undef(%students_by_id);
2159: #
2160: $current_course = $courseid;
2161: }
2162: #
2163: # Set up database names
2164: my $base_id = $courseid;
2165: $symb_table = $base_id.'_'.'symb';
2166: $part_table = $base_id.'_'.'part';
2167: $student_table = $base_id.'_'.'student';
1.87 matthew 2168: $studentdata_table = $base_id.'_'.'studentdata';
1.61 matthew 2169: $performance_table = $base_id.'_'.'performance';
2170: $parameters_table = $base_id.'_'.'parameters';
1.89 matthew 2171: $fulldump_part_table = $base_id.'_'.'partdata';
2172: $fulldump_response_table = $base_id.'_'.'responsedata';
2173: $fulldump_timestamp_table = $base_id.'_'.'timestampdata';
2174: #
2175: @Tables = (
2176: $symb_table,
2177: $part_table,
2178: $student_table,
2179: $studentdata_table,
2180: $performance_table,
2181: $parameters_table,
2182: $fulldump_part_table,
2183: $fulldump_response_table,
2184: $fulldump_timestamp_table,
2185: );
1.61 matthew 2186: return;
1.3 stredwic 2187: }
1.1 stredwic 2188:
1.35 matthew 2189: ################################################
2190: ################################################
2191:
2192: =pod
2193:
1.57 matthew 2194: =back
2195:
2196: =item End of Local Data Caching Subroutines
2197:
2198: =cut
2199:
2200: ################################################
2201: ################################################
2202:
1.89 matthew 2203: } # End scope of table identifiers
1.57 matthew 2204:
2205: ################################################
2206: ################################################
2207:
2208: =pod
2209:
2210: =head3 Classlist Subroutines
2211:
1.35 matthew 2212: =item &get_classlist();
2213:
2214: Retrieve the classist of a given class or of the current class. Student
2215: information is returned from the classlist.db file and, if needed,
2216: from the students environment.
2217:
2218: Optional arguments are $cid, $cdom, and $cnum (course id, course domain,
2219: and course number, respectively). Any omitted arguments will be taken
2220: from the current environment ($ENV{'request.course.id'},
2221: $ENV{'course.'.$cid.'.domain'}, and $ENV{'course.'.$cid.'.num'}).
2222:
2223: Returns a reference to a hash which contains:
2224: keys '$sname:$sdom'
1.54 bowersj2 2225: values [$sdom,$sname,$end,$start,$id,$section,$fullname,$status]
2226:
2227: The constant values CL_SDOM, CL_SNAME, CL_END, etc. can be used
2228: as indices into the returned list to future-proof clients against
2229: changes in the list order.
1.35 matthew 2230:
2231: =cut
2232:
2233: ################################################
2234: ################################################
1.54 bowersj2 2235:
2236: sub CL_SDOM { return 0; }
2237: sub CL_SNAME { return 1; }
2238: sub CL_END { return 2; }
2239: sub CL_START { return 3; }
2240: sub CL_ID { return 4; }
2241: sub CL_SECTION { return 5; }
2242: sub CL_FULLNAME { return 6; }
2243: sub CL_STATUS { return 7; }
1.35 matthew 2244:
2245: sub get_classlist {
2246: my ($cid,$cdom,$cnum) = @_;
2247: $cid = $cid || $ENV{'request.course.id'};
2248: $cdom = $cdom || $ENV{'course.'.$cid.'.domain'};
2249: $cnum = $cnum || $ENV{'course.'.$cid.'.num'};
1.57 matthew 2250: my $now = time;
1.35 matthew 2251: #
2252: my %classlist=&Apache::lonnet::dump('classlist',$cdom,$cnum);
2253: while (my ($student,$info) = each(%classlist)) {
1.60 matthew 2254: if ($student =~ /^(con_lost|error|no_such_host)/i) {
2255: &Apache::lonnet::logthis('get_classlist error for '.$cid.':'.$student);
2256: return undef;
2257: }
1.35 matthew 2258: my ($sname,$sdom) = split(/:/,$student);
2259: my @Values = split(/:/,$info);
2260: my ($end,$start,$id,$section,$fullname);
2261: if (@Values > 2) {
2262: ($end,$start,$id,$section,$fullname) = @Values;
2263: } else { # We have to get the data ourselves
2264: ($end,$start) = @Values;
1.37 matthew 2265: $section = &Apache::lonnet::getsection($sdom,$sname,$cid);
1.35 matthew 2266: my %info=&Apache::lonnet::get('environment',
2267: ['firstname','middlename',
2268: 'lastname','generation','id'],
2269: $sdom, $sname);
2270: my ($tmp) = keys(%info);
2271: if ($tmp =~/^(con_lost|error|no_such_host)/i) {
2272: $fullname = 'not available';
2273: $id = 'not available';
1.38 matthew 2274: &Apache::lonnet::logthis('unable to retrieve environment '.
2275: 'for '.$sname.':'.$sdom);
1.35 matthew 2276: } else {
2277: $fullname = &ProcessFullName(@info{qw/lastname generation
2278: firstname middlename/});
2279: $id = $info{'id'};
2280: }
1.36 matthew 2281: # Update the classlist with this students information
2282: if ($fullname ne 'not available') {
2283: my $enrolldata = join(':',$end,$start,$id,$section,$fullname);
2284: my $reply=&Apache::lonnet::cput('classlist',
2285: {$student => $enrolldata},
2286: $cdom,$cnum);
2287: if ($reply !~ /^(ok|delayed)/) {
2288: &Apache::lonnet::logthis('Unable to update classlist for '.
2289: 'student '.$sname.':'.$sdom.
2290: ' error:'.$reply);
2291: }
2292: }
1.35 matthew 2293: }
2294: my $status='Expired';
2295: if(((!$end) || $now < $end) && ((!$start) || ($now > $start))) {
2296: $status='Active';
2297: }
2298: $classlist{$student} =
2299: [$sdom,$sname,$end,$start,$id,$section,$fullname,$status];
2300: }
2301: if (wantarray()) {
2302: return (\%classlist,['domain','username','end','start','id',
2303: 'section','fullname','status']);
2304: } else {
2305: return \%classlist;
2306: }
2307: }
2308:
1.1 stredwic 2309: # ----- END HELPER FUNCTIONS --------------------------------------------
2310:
2311: 1;
2312: __END__
1.36 matthew 2313:
1.35 matthew 2314:
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