Annotation of loncom/interface/loncoursedata.pm, revision 1.99
1.1 stredwic 1: # The LearningOnline Network with CAPA
2: #
1.99 ! matthew 3: # $Id: loncoursedata.pm,v 1.98 2003/10/02 14:11:36 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 => 'tries',
715: type => 'SMALLINT UNSIGNED',
716: restrictions => 'NOT NULL' },
717: { name => 'awarddetail',
718: type => 'TINYTEXT' },
719: # { name => 'message',
720: # type => 'CHAR' },
721: { name => 'response_specific',
722: type => 'TINYTEXT' },
723: { name => 'response_specific_value',
724: type => 'TINYTEXT' },
725: { name => 'submission',
726: type => 'TEXT'},
727: ],
728: 'PRIMARY KEY' => ['symb_id','part_id','response_id','student_id',
729: 'transaction'],
730: 'KEY' => [
731: { columns=>['symb_id'] },
732: { columns=>['part_id','response_id'] },
733: { columns=>['student_id'] },
734: ],
735: };
736: my $fulldump_timestamp_table_def = {
737: id => $fulldump_timestamp_table,
738: permanent => 'no',
739: columns => [
740: { name => 'symb_id',
741: type => 'MEDIUMINT UNSIGNED',
742: restrictions => 'NOT NULL' },
743: { name => 'student_id',
744: type => 'MEDIUMINT UNSIGNED',
745: restrictions => 'NOT NULL' },
746: { name => 'transaction',
747: type => 'MEDIUMINT UNSIGNED',
748: restrictions => 'NOT NULL' },
749: { name => 'timestamp',
750: type => 'INT UNSIGNED'},
751: ],
752: 'PRIMARY KEY' => ['symb_id','student_id','transaction'],
753: 'KEY' => [
754: { columns=>['symb_id'] },
755: { columns=>['student_id'] },
756: { columns=>['transaction'] },
757: ],
758: };
759:
760: #
1.57 matthew 761: my $parameters_table_def = {
762: id => $parameters_table,
763: permanent => 'no',
764: columns => [{ name => 'symb_id',
765: type => 'MEDIUMINT UNSIGNED',
766: restrictions => 'NOT NULL' },
767: { name => 'student_id',
768: type => 'MEDIUMINT UNSIGNED',
769: restrictions => 'NOT NULL' },
770: { name => 'parameter',
771: type => 'TINYTEXT',
772: restrictions => 'NOT NULL' },
773: { name => 'value',
774: type => 'MEDIUMTEXT' },
775: ],
776: 'PRIMARY KEY' => ['symb_id','student_id','parameter (255)'],
777: };
778: #
779: # Create the tables
780: my $tableid;
781: $tableid = &Apache::lonmysql::create_table($symb_table_def);
782: if (! defined($tableid)) {
783: &Apache::lonnet::logthis("error creating symb_table: ".
784: &Apache::lonmysql::get_error());
785: return 1;
786: }
787: #
788: $tableid = &Apache::lonmysql::create_table($part_table_def);
789: if (! defined($tableid)) {
790: &Apache::lonnet::logthis("error creating part_table: ".
791: &Apache::lonmysql::get_error());
792: return 2;
793: }
794: #
795: $tableid = &Apache::lonmysql::create_table($student_table_def);
796: if (! defined($tableid)) {
797: &Apache::lonnet::logthis("error creating student_table: ".
798: &Apache::lonmysql::get_error());
799: return 3;
800: }
801: #
1.87 matthew 802: $tableid = &Apache::lonmysql::create_table($studentdata_table_def);
1.57 matthew 803: if (! defined($tableid)) {
1.87 matthew 804: &Apache::lonnet::logthis("error creating studentdata_table: ".
1.57 matthew 805: &Apache::lonmysql::get_error());
806: return 4;
807: }
808: #
809: $tableid = &Apache::lonmysql::create_table($performance_table_def);
810: if (! defined($tableid)) {
811: &Apache::lonnet::logthis("error creating preformance_table: ".
812: &Apache::lonmysql::get_error());
813: return 5;
814: }
815: #
816: $tableid = &Apache::lonmysql::create_table($parameters_table_def);
817: if (! defined($tableid)) {
818: &Apache::lonnet::logthis("error creating parameters_table: ".
819: &Apache::lonmysql::get_error());
820: return 6;
821: }
1.89 matthew 822: #
823: $tableid = &Apache::lonmysql::create_table($fulldump_part_table_def);
824: if (! defined($tableid)) {
825: &Apache::lonnet::logthis("error creating fulldump_part_table: ".
826: &Apache::lonmysql::get_error());
827: return 7;
828: }
829: #
830: $tableid = &Apache::lonmysql::create_table($fulldump_response_table_def);
831: if (! defined($tableid)) {
832: &Apache::lonnet::logthis("error creating fulldump_response_table: ".
833: &Apache::lonmysql::get_error());
834: return 8;
835: }
836: $tableid = &Apache::lonmysql::create_table($fulldump_timestamp_table_def);
837: if (! defined($tableid)) {
838: &Apache::lonnet::logthis("error creating fulldump_timestamp_table: ".
839: &Apache::lonmysql::get_error());
840: return 9;
841: }
1.57 matthew 842: return 0;
1.70 matthew 843: }
844:
845: ################################################
846: ################################################
847:
848: =pod
849:
850: =item &delete_caches()
851:
852: =cut
853:
854: ################################################
855: ################################################
856: sub delete_caches {
857: my $courseid = shift;
858: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
859: #
860: &setup_table_names($courseid);
861: #
862: my $dbh = &Apache::lonmysql::get_dbh();
1.89 matthew 863: foreach my $table (@Tables) {
1.70 matthew 864: my $command = 'DROP TABLE '.$table.';';
865: $dbh->do($command);
866: if ($dbh->err) {
867: &Apache::lonnet::logthis($command.' resulted in error: '.$dbh->errstr);
868: }
869: }
870: return;
1.57 matthew 871: }
872:
873: ################################################
874: ################################################
875:
876: =pod
877:
878: =item &get_part_id()
879:
880: Get the MySQL id of a problem part string.
881:
882: Input: $part
883:
884: Output: undef on error, integer $part_id on success.
885:
886: =item &get_part()
887:
888: Get the string describing a part from the MySQL id of the problem part.
889:
890: Input: $part_id
891:
892: Output: undef on error, $part string on success.
893:
894: =cut
895:
896: ################################################
897: ################################################
898:
1.61 matthew 899: my $have_read_part_table = 0;
1.57 matthew 900: my %ids_by_part;
901: my %parts_by_id;
902:
903: sub get_part_id {
904: my ($part) = @_;
1.61 matthew 905: $part = 0 if (! defined($part));
906: if (! $have_read_part_table) {
907: my @Result = &Apache::lonmysql::get_rows($part_table);
908: foreach (@Result) {
909: $ids_by_part{$_->[1]}=$_->[0];
910: }
911: $have_read_part_table = 1;
912: }
1.57 matthew 913: if (! exists($ids_by_part{$part})) {
914: &Apache::lonmysql::store_row($part_table,[undef,$part]);
915: undef(%ids_by_part);
916: my @Result = &Apache::lonmysql::get_rows($part_table);
917: foreach (@Result) {
918: $ids_by_part{$_->[1]}=$_->[0];
919: }
920: }
921: return $ids_by_part{$part} if (exists($ids_by_part{$part}));
922: return undef; # error
923: }
924:
925: sub get_part {
926: my ($part_id) = @_;
927: if (! exists($parts_by_id{$part_id}) ||
928: ! defined($parts_by_id{$part_id}) ||
929: $parts_by_id{$part_id} eq '') {
930: my @Result = &Apache::lonmysql::get_rows($part_table);
931: foreach (@Result) {
932: $parts_by_id{$_->[0]}=$_->[1];
933: }
934: }
935: return $parts_by_id{$part_id} if(exists($parts_by_id{$part_id}));
936: return undef; # error
937: }
938:
939: ################################################
940: ################################################
941:
942: =pod
943:
944: =item &get_symb_id()
945:
946: Get the MySQL id of a symb.
947:
948: Input: $symb
949:
950: Output: undef on error, integer $symb_id on success.
951:
952: =item &get_symb()
953:
954: Get the symb associated with a MySQL symb_id.
955:
956: Input: $symb_id
957:
958: Output: undef on error, $symb on success.
959:
960: =cut
961:
962: ################################################
963: ################################################
964:
1.61 matthew 965: my $have_read_symb_table = 0;
1.57 matthew 966: my %ids_by_symb;
967: my %symbs_by_id;
968:
969: sub get_symb_id {
970: my ($symb) = @_;
1.61 matthew 971: if (! $have_read_symb_table) {
972: my @Result = &Apache::lonmysql::get_rows($symb_table);
973: foreach (@Result) {
974: $ids_by_symb{$_->[1]}=$_->[0];
975: }
976: $have_read_symb_table = 1;
977: }
1.57 matthew 978: if (! exists($ids_by_symb{$symb})) {
979: &Apache::lonmysql::store_row($symb_table,[undef,$symb]);
980: undef(%ids_by_symb);
981: my @Result = &Apache::lonmysql::get_rows($symb_table);
982: foreach (@Result) {
983: $ids_by_symb{$_->[1]}=$_->[0];
984: }
985: }
986: return $ids_by_symb{$symb} if(exists( $ids_by_symb{$symb}));
987: return undef; # error
988: }
989:
990: sub get_symb {
991: my ($symb_id) = @_;
992: if (! exists($symbs_by_id{$symb_id}) ||
993: ! defined($symbs_by_id{$symb_id}) ||
994: $symbs_by_id{$symb_id} eq '') {
995: my @Result = &Apache::lonmysql::get_rows($symb_table);
996: foreach (@Result) {
997: $symbs_by_id{$_->[0]}=$_->[1];
998: }
999: }
1000: return $symbs_by_id{$symb_id} if(exists( $symbs_by_id{$symb_id}));
1001: return undef; # error
1002: }
1003:
1004: ################################################
1005: ################################################
1006:
1007: =pod
1008:
1009: =item &get_student_id()
1010:
1011: Get the MySQL id of a student.
1012:
1013: Input: $sname, $dom
1014:
1015: Output: undef on error, integer $student_id on success.
1016:
1017: =item &get_student()
1018:
1019: Get student username:domain associated with the MySQL student_id.
1020:
1021: Input: $student_id
1022:
1023: Output: undef on error, string $student (username:domain) on success.
1024:
1025: =cut
1026:
1027: ################################################
1028: ################################################
1029:
1.61 matthew 1030: my $have_read_student_table = 0;
1.57 matthew 1031: my %ids_by_student;
1032: my %students_by_id;
1033:
1034: sub get_student_id {
1035: my ($sname,$sdom) = @_;
1036: my $student = $sname.':'.$sdom;
1.61 matthew 1037: if (! $have_read_student_table) {
1038: my @Result = &Apache::lonmysql::get_rows($student_table);
1039: foreach (@Result) {
1040: $ids_by_student{$_->[1]}=$_->[0];
1041: }
1042: $have_read_student_table = 1;
1043: }
1.57 matthew 1044: if (! exists($ids_by_student{$student})) {
1.85 matthew 1045: &Apache::lonmysql::store_row($student_table,[undef,$student,undef]);
1.57 matthew 1046: undef(%ids_by_student);
1047: my @Result = &Apache::lonmysql::get_rows($student_table);
1048: foreach (@Result) {
1049: $ids_by_student{$_->[1]}=$_->[0];
1050: }
1051: }
1052: return $ids_by_student{$student} if(exists( $ids_by_student{$student}));
1053: return undef; # error
1054: }
1055:
1056: sub get_student {
1057: my ($student_id) = @_;
1058: if (! exists($students_by_id{$student_id}) ||
1059: ! defined($students_by_id{$student_id}) ||
1060: $students_by_id{$student_id} eq '') {
1061: my @Result = &Apache::lonmysql::get_rows($student_table);
1062: foreach (@Result) {
1063: $students_by_id{$_->[0]}=$_->[1];
1064: }
1065: }
1066: return $students_by_id{$student_id} if(exists($students_by_id{$student_id}));
1067: return undef; # error
1068: }
1.99 ! matthew 1069:
! 1070: ################################################
! 1071: ################################################
! 1072:
! 1073: =pod
! 1074:
! 1075: =item &clear_internal_caches()
! 1076:
! 1077: Causes the internal caches used in get_student_id, get_student,
! 1078: get_symb_id, get_symb, get_part_id, and get_part to be undef'd.
! 1079:
! 1080: Needs to be called before the first operation with the MySQL database
! 1081: for a given Apache request.
! 1082:
! 1083: =cut
! 1084:
! 1085: ################################################
! 1086: ################################################
! 1087: sub clear_internal_caches {
! 1088: $have_read_part_table = 0;
! 1089: undef(%ids_by_part);
! 1090: undef(%parts_by_id);
! 1091: $have_read_symb_table = 0;
! 1092: undef(%ids_by_symb);
! 1093: undef(%symbs_by_id);
! 1094: $have_read_student_table = 0;
! 1095: undef(%ids_by_student);
! 1096: undef(%students_by_id);
! 1097: }
! 1098:
1.57 matthew 1099:
1100: ################################################
1101: ################################################
1102:
1103: =pod
1104:
1.89 matthew 1105: =item &update_full_student_data($sname,$sdom,$courseid)
1106:
1107: Does a lonnet::dump on a student to populate the courses tables.
1108:
1109: Input: $sname, $sdom, $courseid
1110:
1111: Output: $returnstatus
1112:
1113: $returnstatus is a string describing any errors that occured. 'okay' is the
1114: default.
1115:
1116: This subroutine loads a students data using lonnet::dump and inserts
1117: it into the MySQL database. The inserts are done on three tables,
1118: $fulldump_response_table, $fulldump_part_table, and $fulldump_timestamp_table.
1119: The INSERT calls are made directly by this subroutine, not through lonmysql
1120: because we do a 'bulk'insert which takes advantage of MySQLs non-SQL
1121: compliant INSERT command to insert multiple rows at a time.
1122: If anything has gone wrong during this process, $returnstatus is updated with
1123: a description of the error.
1124:
1125: Once the "fulldump" tables are updated, the tables used for chart and
1126: spreadsheet (which hold only the current state of the student on their
1127: homework, not historical data) are updated. If all updates have occured
1128: successfully, the studentdata table is updated to reflect the time of the
1129: update.
1130:
1131: Notice we do not insert the data and immediately query it. This means it
1132: is possible for there to be data returned this first time that is not
1133: available the second time. CYA.
1134:
1135: =cut
1136:
1137: ################################################
1138: ################################################
1139: sub update_full_student_data {
1140: my ($sname,$sdom,$courseid) = @_;
1141: #
1142: # Set up database names
1143: &setup_table_names($courseid);
1144: #
1145: my $student_id = &get_student_id($sname,$sdom);
1146: my $student = $sname.':'.$sdom;
1147: #
1148: my $returnstatus = 'okay';
1149: #
1150: # Download students data
1151: my $time_of_retrieval = time;
1152: my @tmp = &Apache::lonnet::dump($courseid,$sdom,$sname);
1153: if (@tmp && $tmp[0] =~ /^error/) {
1154: $returnstatus = 'error retrieving full student data';
1155: return $returnstatus;
1156: } elsif (! @tmp) {
1157: $returnstatus = 'okay: no student data';
1158: return $returnstatus;
1159: }
1160: my %studentdata = @tmp;
1161: #
1162: # Get database handle and clean out the tables
1163: my $dbh = &Apache::lonmysql::get_dbh();
1164: $dbh->do('DELETE FROM '.$fulldump_response_table.' WHERE student_id='.
1165: $student_id);
1166: $dbh->do('DELETE FROM '.$fulldump_part_table.' WHERE student_id='.
1167: $student_id);
1168: $dbh->do('DELETE FROM '.$fulldump_timestamp_table.' WHERE student_id='.
1169: $student_id);
1170: #
1171: # Parse and store the data into a form we can handle
1172: my $partdata;
1173: my $respdata;
1174: while (my ($key,$value) = each(%studentdata)) {
1175: next if ($key =~ /^(\d+):(resource$|subnum$|keys:)/);
1176: my ($transaction,$symb,$parameter) = split(':',$key);
1177: my $symb_id = &get_symb_id($symb);
1178: if ($parameter eq 'timestamp') {
1179: # We can deal with 'timestamp' right away
1180: my @timestamp_storage = ($symb_id,$student_id,
1181: $transaction,$value);
1.98 matthew 1182: my $store_command = 'INSERT IGNORE INTO '.$fulldump_timestamp_table.
1.89 matthew 1183: " VALUES ('".join("','",@timestamp_storage)."');";
1184: $dbh->do($store_command);
1185: if ($dbh->err()) {
1186: &Apache::lonnet::logthis('unable to execute '.$store_command);
1187: &Apache::lonnet::logthis($dbh->errstr());
1188: }
1189: next;
1190: } elsif ($parameter eq 'version') {
1191: next;
1.90 matthew 1192: } elsif ($parameter =~ /^resource\.(.*)\.(tries|
1193: award|
1194: awarded|
1195: previous|
1196: solved|
1197: awarddetail|
1198: submission|
1199: submissiongrading|
1200: molecule)\s*$/x){
1.89 matthew 1201: # we do not have enough information to store an
1202: # entire row, so we save it up until later.
1203: my ($part_and_resp_id,$field) = ($1,$2);
1204: my ($part,$part_id,$resp,$resp_id);
1205: if ($part_and_resp_id =~ /\./) {
1206: ($part,$resp) = split(/\./,$part_and_resp_id);
1207: $part_id = &get_part_id($part);
1208: $resp_id = &get_part_id($resp);
1209: } else {
1210: $part_id = &get_part_id($part_and_resp_id);
1211: }
1.90 matthew 1212: # Deal with part specific data
1.89 matthew 1213: if ($field =~ /^(tries|award|awarded|previous)$/) {
1214: $partdata->{$symb_id}->{$part_id}->{$transaction}->{$field}=$value;
1215: }
1.90 matthew 1216: # deal with response specific data
1.89 matthew 1217: if (defined($resp_id) &&
1.90 matthew 1218: $field =~ /^(tries|
1219: awarddetail|
1220: submission|
1221: submissiongrading|
1222: molecule)$/x) {
1.89 matthew 1223: if ($field eq 'submission') {
1224: # We have to be careful with user supplied input.
1225: # most of the time we are okay because it is escaped.
1226: # However, there is one wrinkle: submissions which end in
1227: # and odd number of '\' cause insert errors to occur.
1228: # Best trap this somehow...
1229: my ($offensive_string) = ($value =~ /(\\+)$/);
1230: if (length($offensive_string) % 2) {
1231: $value =~ s/\\$/\\\\/;
1232: }
1233: }
1.90 matthew 1234: if ($field eq 'submissiongrading' ||
1235: $field eq 'molecule') {
1236: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific'}=$field;
1237: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific_value'}=$value;
1238: } else {
1239: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{$field}=$value;
1240: }
1.89 matthew 1241: }
1242: }
1243: }
1244: ##
1245: ## Store the part data
1.98 matthew 1246: my $store_command = 'INSERT IGNORE INTO '.$fulldump_part_table.
1.89 matthew 1247: ' VALUES '."\n";
1248: my $store_rows = 0;
1249: while (my ($symb_id,$hash1) = each (%$partdata)) {
1250: while (my ($part_id,$hash2) = each (%$hash1)) {
1251: while (my ($transaction,$data) = each (%$hash2)) {
1252: $store_command .= "('".join("','",$symb_id,$part_id,
1253: $student_id,
1254: $transaction,
1255: $data->{'tries'},
1256: $data->{'award'},
1257: $data->{'awarded'},
1258: $data->{'previous'})."'),";
1259: $store_rows++;
1260: }
1261: }
1262: }
1263: if ($store_rows) {
1264: chop($store_command);
1265: $dbh->do($store_command);
1266: if ($dbh->err) {
1267: $returnstatus = 'error storing part data';
1268: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
1269: &Apache::lonnet::logthis("While attempting\n".$store_command);
1270: }
1271: }
1272: ##
1273: ## Store the response data
1.98 matthew 1274: $store_command = 'INSERT IGNORE INTO '.$fulldump_response_table.
1.89 matthew 1275: ' VALUES '."\n";
1276: $store_rows = 0;
1277: while (my ($symb_id,$hash1) = each (%$respdata)) {
1278: while (my ($part_id,$hash2) = each (%$hash1)) {
1279: while (my ($resp_id,$hash3) = each (%$hash2)) {
1280: while (my ($transaction,$data) = each (%$hash3)) {
1281: $store_command .= "('".join("','",$symb_id,$part_id,
1282: $resp_id,$student_id,
1283: $transaction,
1284: $data->{'tries'},
1285: $data->{'awarddetail'},
1.90 matthew 1286: $data->{'response_specific'},
1287: $data->{'response_specific_value'},
1.89 matthew 1288: $data->{'submission'})."'),";
1289: $store_rows++;
1290: }
1291: }
1292: }
1293: }
1294: if ($store_rows) {
1295: chop($store_command);
1296: $dbh->do($store_command);
1297: if ($dbh->err) {
1298: $returnstatus = 'error storing response data';
1299: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
1300: &Apache::lonnet::logthis("While attempting\n".$store_command);
1301: }
1302: }
1303: ##
1304: ## Update the students "current" data in the performance
1305: ## and parameters tables.
1306: my ($status,undef) = &store_student_data
1307: ($sname,$sdom,$courseid,
1308: &Apache::lonnet::convert_dump_to_currentdump(\%studentdata));
1309: if ($returnstatus eq 'okay' && $status ne 'okay') {
1310: $returnstatus = 'error storing current data:'.$status;
1311: } elsif ($status ne 'okay') {
1312: $returnstatus .= ' error storing current data:'.$status;
1313: }
1314: ##
1315: ## Update the students time......
1316: if ($returnstatus eq 'okay') {
1317: &Apache::lonmysql::replace_row
1318: ($studentdata_table,
1319: [$student_id,$time_of_retrieval,$time_of_retrieval,undef,undef]);
1320: }
1321: return $returnstatus;
1322: }
1323:
1324: ################################################
1325: ################################################
1326:
1327: =pod
1328:
1.57 matthew 1329: =item &update_student_data()
1330:
1331: Input: $sname, $sdom, $courseid
1332:
1333: Output: $returnstatus, \%student_data
1334:
1335: $returnstatus is a string describing any errors that occured. 'okay' is the
1336: default.
1337: \%student_data is the data returned by a call to lonnet::currentdump.
1338:
1339: This subroutine loads a students data using lonnet::currentdump and inserts
1340: it into the MySQL database. The inserts are done on two tables,
1341: $performance_table and $parameters_table. $parameters_table holds the data
1342: that is not included in $performance_table. See the description of
1343: $performance_table elsewhere in this file. The INSERT calls are made
1344: directly by this subroutine, not through lonmysql because we do a 'bulk'
1345: insert which takes advantage of MySQLs non-SQL compliant INSERT command to
1346: insert multiple rows at a time. If anything has gone wrong during this
1347: process, $returnstatus is updated with a description of the error and
1348: \%student_data is returned.
1349:
1350: Notice we do not insert the data and immediately query it. This means it
1351: is possible for there to be data returned this first time that is not
1352: available the second time. CYA.
1353:
1354: =cut
1355:
1356: ################################################
1357: ################################################
1358: sub update_student_data {
1359: my ($sname,$sdom,$courseid) = @_;
1360: #
1.60 matthew 1361: # Set up database names
1362: &setup_table_names($courseid);
1363: #
1.57 matthew 1364: my $student_id = &get_student_id($sname,$sdom);
1365: my $student = $sname.':'.$sdom;
1366: #
1367: my $returnstatus = 'okay';
1368: #
1369: # Download students data
1370: my $time_of_retrieval = time;
1371: my @tmp = &Apache::lonnet::currentdump($courseid,$sdom,$sname);
1372: if ((scalar(@tmp) > 0) && ($tmp[0] =~ /^error:/)) {
1373: &Apache::lonnet::logthis('error getting data for '.
1374: $sname.':'.$sdom.' in course '.$courseid.
1375: ':'.$tmp[0]);
1376: $returnstatus = 'error getting data';
1.79 matthew 1377: return ($returnstatus,undef);
1.57 matthew 1378: }
1379: if (scalar(@tmp) < 1) {
1380: return ('no data',undef);
1381: }
1382: my %student_data = @tmp;
1.89 matthew 1383: my @Results = &store_student_data($sname,$sdom,$courseid,\%student_data);
1384: #
1385: # Set the students update time
1.96 matthew 1386: if ($Results[0] eq 'okay') {
1.95 matthew 1387: &Apache::lonmysql::replace_row($studentdata_table,
1.89 matthew 1388: [$student_id,$time_of_retrieval,undef,undef,undef]);
1.95 matthew 1389: }
1.89 matthew 1390: #
1391: return @Results;
1392: }
1393:
1394: sub store_student_data {
1395: my ($sname,$sdom,$courseid,$student_data) = @_;
1396: #
1397: my $student_id = &get_student_id($sname,$sdom);
1398: my $student = $sname.':'.$sdom;
1399: #
1400: my $returnstatus = 'okay';
1.57 matthew 1401: #
1402: # Remove all of the students data from the table
1.60 matthew 1403: my $dbh = &Apache::lonmysql::get_dbh();
1404: $dbh->do('DELETE FROM '.$performance_table.' WHERE student_id='.
1405: $student_id);
1406: $dbh->do('DELETE FROM '.$parameters_table.' WHERE student_id='.
1407: $student_id);
1.57 matthew 1408: #
1409: # Store away the data
1410: #
1411: my $starttime = Time::HiRes::time;
1412: my $elapsed = 0;
1413: my $rows_stored;
1.98 matthew 1414: my $store_parameters_command = 'INSERT IGNORE INTO '.$parameters_table.
1.60 matthew 1415: ' VALUES '."\n";
1.61 matthew 1416: my $num_parameters = 0;
1.98 matthew 1417: my $store_performance_command = 'INSERT IGNORE INTO '.$performance_table.
1.60 matthew 1418: ' VALUES '."\n";
1.79 matthew 1419: return ('error',undef) if (! defined($dbh));
1.89 matthew 1420: while (my ($current_symb,$param_hash) = each(%{$student_data})) {
1.57 matthew 1421: #
1422: # make sure the symb is set up properly
1423: my $symb_id = &get_symb_id($current_symb);
1424: #
1425: # Load data into the tables
1.63 matthew 1426: while (my ($parameter,$value) = each(%$param_hash)) {
1.57 matthew 1427: my $newstring;
1.63 matthew 1428: if ($parameter !~ /(timestamp|resource\.(.*)\.(solved|tries|awarded|award|awarddetail|previous))/) {
1.57 matthew 1429: $newstring = "('".join("','",
1430: $symb_id,$student_id,
1.69 matthew 1431: $parameter)."',".
1432: $dbh->quote($value)."),\n";
1.61 matthew 1433: $num_parameters ++;
1.57 matthew 1434: if ($newstring !~ /''/) {
1435: $store_parameters_command .= $newstring;
1436: $rows_stored++;
1437: }
1438: }
1439: next if ($parameter !~ /^resource\.(.*)\.solved$/);
1440: #
1441: my $part = $1;
1442: my $part_id = &get_part_id($part);
1443: next if (!defined($part_id));
1444: my $solved = $value;
1445: my $tries = $param_hash->{'resource.'.$part.'.tries'};
1446: my $awarded = $param_hash->{'resource.'.$part.'.awarded'};
1447: my $award = $param_hash->{'resource.'.$part.'.award'};
1448: my $awarddetail = $param_hash->{'resource.'.$part.'.awarddetail'};
1449: my $timestamp = $param_hash->{'timestamp'};
1.60 matthew 1450: #
1.74 matthew 1451: $solved = '' if (! defined($solved));
1.57 matthew 1452: $tries = '' if (! defined($tries));
1453: $awarded = '' if (! defined($awarded));
1454: $award = '' if (! defined($award));
1455: $awarddetail = '' if (! defined($awarddetail));
1.73 matthew 1456: $newstring = "('".join("','",$symb_id,$student_id,$part_id,$part,
1.57 matthew 1457: $solved,$tries,$awarded,$award,
1.63 matthew 1458: $awarddetail,$timestamp)."'),\n";
1.57 matthew 1459: $store_performance_command .= $newstring;
1460: $rows_stored++;
1461: }
1462: }
1463: chop $store_parameters_command;
1.60 matthew 1464: chop $store_parameters_command;
1465: chop $store_performance_command;
1.57 matthew 1466: chop $store_performance_command;
1467: my $start = Time::HiRes::time;
1.94 matthew 1468: $dbh->do($store_performance_command);
1469: if ($dbh->err()) {
1470: &Apache::lonnet::logthis(' bigass insert error:'.$dbh->errstr());
1471: &Apache::lonnet::logthis('command = '.$store_performance_command);
1472: $returnstatus = 'error: unable to insert performance into database';
1473: return ($returnstatus,$student_data);
1474: }
1.61 matthew 1475: $dbh->do($store_parameters_command) if ($num_parameters>0);
1.57 matthew 1476: if ($dbh->err()) {
1477: &Apache::lonnet::logthis(' bigass insert error:'.$dbh->errstr());
1.61 matthew 1478: &Apache::lonnet::logthis('command = '.$store_parameters_command);
1.87 matthew 1479: &Apache::lonnet::logthis('rows_stored = '.$rows_stored);
1480: &Apache::lonnet::logthis('student_id = '.$student_id);
1.57 matthew 1481: $returnstatus = 'error: unable to insert parameters into database';
1.89 matthew 1482: return ($returnstatus,$student_data);
1.57 matthew 1483: }
1484: $elapsed += Time::HiRes::time - $start;
1.89 matthew 1485: return ($returnstatus,$student_data);
1.57 matthew 1486: }
1487:
1.89 matthew 1488: ######################################
1489: ######################################
1.57 matthew 1490:
1491: =pod
1492:
1.89 matthew 1493: =item &ensure_tables_are_set_up($courseid)
1.57 matthew 1494:
1.89 matthew 1495: Checks to be sure the MySQL tables for the given class are set up.
1496: If $courseid is omitted it will be obtained from the environment.
1.57 matthew 1497:
1.89 matthew 1498: Returns nothing on success and 'error' on failure
1.57 matthew 1499:
1500: =cut
1501:
1.89 matthew 1502: ######################################
1503: ######################################
1504: sub ensure_tables_are_set_up {
1505: my ($courseid) = @_;
1.61 matthew 1506: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1507: #
1508: # Clean out package variables
1.57 matthew 1509: &setup_table_names($courseid);
1510: #
1511: # if the tables do not exist, make them
1512: my @CurrentTable = &Apache::lonmysql::tables_in_db();
1.87 matthew 1513: my ($found_symb,$found_student,$found_part,$found_studentdata,
1.89 matthew 1514: $found_performance,$found_parameters,$found_fulldump_part,
1515: $found_fulldump_response,$found_fulldump_timestamp);
1.57 matthew 1516: foreach (@CurrentTable) {
1517: $found_symb = 1 if ($_ eq $symb_table);
1518: $found_student = 1 if ($_ eq $student_table);
1519: $found_part = 1 if ($_ eq $part_table);
1.87 matthew 1520: $found_studentdata = 1 if ($_ eq $studentdata_table);
1.57 matthew 1521: $found_performance = 1 if ($_ eq $performance_table);
1522: $found_parameters = 1 if ($_ eq $parameters_table);
1.89 matthew 1523: $found_fulldump_part = 1 if ($_ eq $fulldump_part_table);
1524: $found_fulldump_response = 1 if ($_ eq $fulldump_response_table);
1525: $found_fulldump_timestamp = 1 if ($_ eq $fulldump_timestamp_table);
1.57 matthew 1526: }
1.87 matthew 1527: if (!$found_symb || !$found_studentdata ||
1.57 matthew 1528: !$found_student || !$found_part ||
1.89 matthew 1529: !$found_performance || !$found_parameters ||
1530: !$found_fulldump_part || !$found_fulldump_response ||
1531: !$found_fulldump_timestamp ) {
1.57 matthew 1532: if (&init_dbs($courseid)) {
1.89 matthew 1533: return 'error';
1.57 matthew 1534: }
1535: }
1.89 matthew 1536: }
1537:
1538: ################################################
1539: ################################################
1540:
1541: =pod
1542:
1543: =item &ensure_current_data()
1544:
1545: Input: $sname, $sdom, $courseid
1546:
1547: Output: $status, $data
1548:
1549: This routine ensures the data for a given student is up to date.
1550: The $studentdata_table is queried to determine the time of the last update.
1551: If the students data is out of date, &update_student_data() is called.
1552: The return values from the call to &update_student_data() are returned.
1553:
1554: =cut
1555:
1556: ################################################
1557: ################################################
1558: sub ensure_current_data {
1559: my ($sname,$sdom,$courseid) = @_;
1560: my $status = 'okay'; # return value
1561: #
1562: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1563: &ensure_tables_are_set_up($courseid);
1.57 matthew 1564: #
1565: # Get the update time for the user
1566: my $updatetime = 0;
1.60 matthew 1567: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1568: ($sdom,$sname,$courseid.'.db',
1569: $Apache::lonnet::perlvar{'lonUsersDir'});
1.57 matthew 1570: #
1.87 matthew 1571: my $student_id = &get_student_id($sname,$sdom);
1572: my @Result = &Apache::lonmysql::get_rows($studentdata_table,
1573: "student_id ='$student_id'");
1.57 matthew 1574: my $data = undef;
1575: if (@Result) {
1576: $updatetime = $Result[0]->[1];
1577: }
1578: if ($modifiedtime > $updatetime) {
1579: ($status,$data) = &update_student_data($sname,$sdom,$courseid);
1580: }
1581: return ($status,$data);
1582: }
1583:
1584: ################################################
1585: ################################################
1586:
1587: =pod
1588:
1.89 matthew 1589: =item &ensure_current_full_data($sname,$sdom,$courseid)
1590:
1591: Input: $sname, $sdom, $courseid
1592:
1593: Output: $status
1594:
1595: This routine ensures the fulldata (the data from a lonnet::dump, not a
1596: lonnet::currentdump) for a given student is up to date.
1597: The $studentdata_table is queried to determine the time of the last update.
1598: If the students fulldata is out of date, &update_full_student_data() is
1599: called.
1600:
1601: The return value from the call to &update_full_student_data() is returned.
1602:
1603: =cut
1604:
1605: ################################################
1606: ################################################
1607: sub ensure_current_full_data {
1608: my ($sname,$sdom,$courseid) = @_;
1609: my $status = 'okay'; # return value
1610: #
1611: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1612: &ensure_tables_are_set_up($courseid);
1613: #
1614: # Get the update time for the user
1615: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1616: ($sdom,$sname,$courseid.'.db',
1617: $Apache::lonnet::perlvar{'lonUsersDir'});
1618: #
1619: my $student_id = &get_student_id($sname,$sdom);
1620: my @Result = &Apache::lonmysql::get_rows($studentdata_table,
1621: "student_id ='$student_id'");
1622: my $updatetime;
1623: if (@Result && ref($Result[0]) eq 'ARRAY') {
1624: $updatetime = $Result[0]->[2];
1625: }
1626: if (! defined($updatetime) || $modifiedtime > $updatetime) {
1627: $status = &update_full_student_data($sname,$sdom,$courseid);
1628: }
1629: return $status;
1630: }
1631:
1632: ################################################
1633: ################################################
1634:
1635: =pod
1636:
1.57 matthew 1637: =item &get_student_data_from_performance_cache()
1638:
1639: Input: $sname, $sdom, $symb, $courseid
1640:
1641: Output: hash reference containing the data for the given student.
1642: If $symb is undef, all the students data is returned.
1643:
1644: This routine is the heart of the local caching system. See the description
1645: of $performance_table, $symb_table, $student_table, and $part_table. The
1646: main task is building the MySQL request. The tables appear in the request
1647: in the order in which they should be parsed by MySQL. When searching
1648: on a student the $student_table is used to locate the 'student_id'. All
1649: rows in $performance_table which have a matching 'student_id' are returned,
1650: with data from $part_table and $symb_table which match the entries in
1651: $performance_table, 'part_id' and 'symb_id'. When searching on a symb,
1652: the $symb_table is processed first, with matching rows grabbed from
1653: $performance_table and filled in from $part_table and $student_table in
1654: that order.
1655:
1656: Running 'EXPLAIN ' on the 'SELECT' statements generated can be quite
1657: interesting, especially if you play with the order the tables are listed.
1658:
1659: =cut
1660:
1661: ################################################
1662: ################################################
1663: sub get_student_data_from_performance_cache {
1664: my ($sname,$sdom,$symb,$courseid)=@_;
1665: my $student = $sname.':'.$sdom if (defined($sname) && defined($sdom));
1.61 matthew 1666: &setup_table_names($courseid);
1.57 matthew 1667: #
1668: # Return hash
1669: my $studentdata;
1670: #
1671: my $dbh = &Apache::lonmysql::get_dbh();
1672: my $request = "SELECT ".
1.73 matthew 1673: "d.symb,a.part,a.solved,a.tries,a.awarded,a.award,a.awarddetail,".
1.63 matthew 1674: "a.timestamp ";
1.57 matthew 1675: if (defined($student)) {
1676: $request .= "FROM $student_table AS b ".
1677: "LEFT JOIN $performance_table AS a ON b.student_id=a.student_id ".
1.73 matthew 1678: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1.57 matthew 1679: "LEFT JOIN $symb_table AS d ON d.symb_id = a.symb_id ".
1680: "WHERE student='$student'";
1681: if (defined($symb) && $symb ne '') {
1.67 matthew 1682: $request .= " AND d.symb=".$dbh->quote($symb);
1.57 matthew 1683: }
1684: } elsif (defined($symb) && $symb ne '') {
1685: $request .= "FROM $symb_table as d ".
1686: "LEFT JOIN $performance_table AS a ON d.symb_id=a.symb_id ".
1.73 matthew 1687: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1.57 matthew 1688: "LEFT JOIN $student_table AS b ON b.student_id = a.student_id ".
1689: "WHERE symb='".$dbh->quote($symb)."'";
1690: }
1691: my $starttime = Time::HiRes::time;
1692: my $rows_retrieved = 0;
1693: my $sth = $dbh->prepare($request);
1694: $sth->execute();
1695: if ($sth->err()) {
1696: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1697: &Apache::lonnet::logthis("\n".$request."\n");
1698: &Apache::lonnet::logthis("error is:".$sth->errstr());
1699: return undef;
1700: }
1701: foreach my $row (@{$sth->fetchall_arrayref}) {
1702: $rows_retrieved++;
1.63 matthew 1703: my ($symb,$part,$solved,$tries,$awarded,$award,$awarddetail,$time) =
1.57 matthew 1704: (@$row);
1705: my $base = 'resource.'.$part;
1706: $studentdata->{$symb}->{$base.'.solved'} = $solved;
1707: $studentdata->{$symb}->{$base.'.tries'} = $tries;
1708: $studentdata->{$symb}->{$base.'.awarded'} = $awarded;
1709: $studentdata->{$symb}->{$base.'.award'} = $award;
1710: $studentdata->{$symb}->{$base.'.awarddetail'} = $awarddetail;
1711: $studentdata->{$symb}->{'timestamp'} = $time if (defined($time) && $time ne '');
1.67 matthew 1712: }
1.97 matthew 1713: ## Get misc parameters
1714: $request = 'SELECT c.symb,a.parameter,a.value '.
1715: "FROM $student_table AS b ".
1716: "LEFT JOIN $parameters_table AS a ON b.student_id=a.student_id ".
1717: "LEFT JOIN $symb_table AS c ON c.symb_id = a.symb_id ".
1718: "WHERE student='$student'";
1719: if (defined($symb) && $symb ne '') {
1720: $request .= " AND c.symb=".$dbh->quote($symb);
1721: }
1722: $sth = $dbh->prepare($request);
1723: $sth->execute();
1724: if ($sth->err()) {
1725: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1726: &Apache::lonnet::logthis("\n".$request."\n");
1727: &Apache::lonnet::logthis("error is:".$sth->errstr());
1728: if (defined($symb) && $symb ne '') {
1729: $studentdata = $studentdata->{$symb};
1730: }
1731: return $studentdata;
1732: }
1733: #
1734: foreach my $row (@{$sth->fetchall_arrayref}) {
1735: $rows_retrieved++;
1736: my ($symb,$parameter,$value) = (@$row);
1737: $studentdata->{$symb}->{$parameter} = $value;
1738: }
1739: #
1.67 matthew 1740: if (defined($symb) && $symb ne '') {
1741: $studentdata = $studentdata->{$symb};
1.57 matthew 1742: }
1743: return $studentdata;
1744: }
1745:
1746: ################################################
1747: ################################################
1748:
1749: =pod
1750:
1751: =item &get_current_state()
1752:
1753: Input: $sname,$sdom,$symb,$courseid
1754:
1755: Output: Described below
1.46 matthew 1756:
1.47 matthew 1757: Retrieve the current status of a students performance. $sname and
1.46 matthew 1758: $sdom are the only required parameters. If $symb is undef the results
1.47 matthew 1759: of an &Apache::lonnet::currentdump() will be returned.
1.46 matthew 1760: If $courseid is undef it will be retrieved from the environment.
1761:
1762: The return structure is based on &Apache::lonnet::currentdump. If
1763: $symb is unspecified, all the students data is returned in a hash of
1764: the form:
1765: (
1766: symb1 => { param1 => value1, param2 => value2 ... },
1767: symb2 => { param1 => value1, param2 => value2 ... },
1768: )
1769:
1770: If $symb is specified, a hash of
1771: (
1772: param1 => value1,
1773: param2 => value2,
1774: )
1775: is returned.
1776:
1.57 matthew 1777: If no data is found for $symb, or if the student has no performance data,
1.46 matthew 1778: an empty list is returned.
1779:
1780: =cut
1781:
1782: ################################################
1783: ################################################
1784: sub get_current_state {
1.47 matthew 1785: my ($sname,$sdom,$symb,$courseid,$forcedownload)=@_;
1786: #
1.46 matthew 1787: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1.47 matthew 1788: #
1.61 matthew 1789: return () if (! defined($sname) || ! defined($sdom));
1790: #
1.57 matthew 1791: my ($status,$data) = &ensure_current_data($sname,$sdom,$courseid);
1.77 matthew 1792: # &Apache::lonnet::logthis
1793: # ('sname = '.$sname.
1794: # ' domain = '.$sdom.
1795: # ' status = '.$status.
1796: # ' data is '.(defined($data)?'defined':'undefined'));
1.73 matthew 1797: # while (my ($symb,$hash) = each(%$data)) {
1798: # &Apache::lonnet::logthis($symb."\n----------------------------------");
1799: # while (my ($key,$value) = each (%$hash)) {
1800: # &Apache::lonnet::logthis(" ".$key." = ".$value);
1801: # }
1802: # }
1.47 matthew 1803: #
1.79 matthew 1804: if (defined($data) && defined($symb) && ref($data->{$symb})) {
1805: return %{$data->{$symb}};
1806: } elsif (defined($data) && ! defined($symb) && ref($data)) {
1807: return %$data;
1808: }
1809: if ($status eq 'no data') {
1.57 matthew 1810: return ();
1811: } else {
1812: if ($status ne 'okay' && $status ne '') {
1813: &Apache::lonnet::logthis('status = '.$status);
1.47 matthew 1814: return ();
1815: }
1.57 matthew 1816: my $returnhash = &get_student_data_from_performance_cache($sname,$sdom,
1817: $symb,$courseid);
1818: return %$returnhash if (defined($returnhash));
1.46 matthew 1819: }
1.57 matthew 1820: return ();
1.61 matthew 1821: }
1822:
1823: ################################################
1824: ################################################
1825:
1826: =pod
1827:
1828: =item &get_problem_statistics()
1829:
1830: Gather data on a given problem. The database is assumed to be
1831: populated and all local caching variables are assumed to be set
1832: properly. This means you need to call &ensure_current_data for
1833: the students you are concerned with prior to calling this routine.
1834:
1835: Inputs: $students, $symb, $part, $courseid
1836:
1.64 matthew 1837: =over 4
1838:
1839: =item $students is an array of hash references.
1840: Each hash must contain at least the 'username' and 'domain' of a student.
1841:
1842: =item $symb is the symb for the problem.
1843:
1844: =item $part is the part id you need statistics for
1845:
1846: =item $courseid is the course id, of course!
1847:
1848: =back
1849:
1.66 matthew 1850: Outputs: See the code for up to date information. A hash reference is
1851: returned. The hash has the following keys defined:
1.64 matthew 1852:
1853: =over 4
1854:
1.66 matthew 1855: =item num_students The number of students attempting the problem
1856:
1857: =item tries The total number of tries for the students
1858:
1859: =item max_tries The maximum number of tries taken
1860:
1861: =item mean_tries The average number of tries
1862:
1863: =item num_solved The number of students able to solve the problem
1864:
1865: =item num_override The number of students whose answer is 'correct_by_override'
1866:
1867: =item deg_of_diff The degree of difficulty of the problem
1868:
1869: =item std_tries The standard deviation of the number of tries
1870:
1871: =item skew_tries The skew of the number of tries
1.64 matthew 1872:
1.66 matthew 1873: =item per_wrong The number of students attempting the problem who were not
1874: able to answer it correctly.
1.64 matthew 1875:
1876: =back
1877:
1.61 matthew 1878: =cut
1879:
1880: ################################################
1881: ################################################
1882: sub get_problem_statistics {
1883: my ($students,$symb,$part,$courseid) = @_;
1884: return if (! defined($symb) || ! defined($part));
1885: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1886: #
1887: my $symb_id = &get_symb_id($symb);
1888: my $part_id = &get_part_id($part);
1889: my $stats_table = $courseid.'_problem_stats';
1890: #
1891: my $dbh = &Apache::lonmysql::get_dbh();
1892: return undef if (! defined($dbh));
1893: #
1894: # A) Number of Students attempting problem
1895: # B) Total number of tries of students attempting problem
1896: # C) Mod (largest number of tries for solving the problem)
1897: # D) Mean (average number of tries for solving the problem)
1898: # E) Number of students to solve the problem
1899: # F) Number of students to solve the problem by override
1900: # G) Number of students unable to solve the problem
1901: # H) Degree of difficulty : 1-(E+F)/B
1902: # I) Standard deviation of number of tries
1903: # J) Skew of tries: sqrt(sum(Xi-D)^3)/A
1904: #
1905: $dbh->do('DROP TABLE '.$stats_table); # May return an error
1906: my $request =
1907: 'CREATE TEMPORARY TABLE '.$stats_table.
1908: ' SELECT student_id,solved,award,tries FROM '.$performance_table.
1909: ' WHERE symb_id='.$symb_id.' AND part_id='.$part_id;
1.64 matthew 1910: if (defined($students)) {
1911: $request .= ' AND ('.
1912: join(' OR ', map {'student_id='.
1913: &get_student_id($_->{'username'},
1914: $_->{'domain'})
1915: } @$students
1916: ).')';
1917: }
1.61 matthew 1918: # &Apache::lonnet::logthis($request);
1919: $dbh->do($request);
1920: my ($num,$tries,$mod,$mean,$STD) = &execute_SQL_request
1921: ($dbh,
1922: 'SELECT COUNT(*),SUM(tries),MAX(tries),AVG(tries),STD(tries) FROM '.
1923: $stats_table);
1924: my ($Solved) = &execute_SQL_request($dbh,'SELECT COUNT(tries) FROM '.
1925: $stats_table.
1.92 matthew 1926: " WHERE solved='correct_by_student' OR solved='correct_by_scantron'");
1.61 matthew 1927: my ($solved) = &execute_SQL_request($dbh,'SELECT COUNT(tries) FROM '.
1928: $stats_table.
1929: " WHERE solved='correct_by_override'");
1930: $num = 0 if (! defined($num));
1931: $tries = 0 if (! defined($tries));
1932: $mod = 0 if (! defined($mod));
1933: $STD = 0 if (! defined($STD));
1934: $Solved = 0 if (! defined($Solved));
1935: $solved = 0 if (! defined($solved));
1936: #
1937: my $DegOfDiff = 'nan';
1.66 matthew 1938: $DegOfDiff = 1-($Solved)/$tries if ($tries>0);
1.61 matthew 1939:
1940: my $SKEW = 'nan';
1.66 matthew 1941: my $wrongpercent = 0;
1.61 matthew 1942: if ($num > 0) {
1943: ($SKEW) = &execute_SQL_request($dbh,'SELECT SQRT(SUM('.
1944: 'POWER(tries - '.$STD.',3)'.
1945: '))/'.$num.' FROM '.$stats_table);
1.66 matthew 1946: $wrongpercent=int(10*100*($num-$Solved+$solved)/$num)/10;
1.61 matthew 1947: }
1948: #
1949: $dbh->do('DROP TABLE '.$stats_table); # May return an error
1.81 matthew 1950: #
1951: # Store in metadata
1952: #
1.80 www 1953: if ($num) {
1954: my %storestats=();
1955:
1.86 www 1956: my $urlres=(&Apache::lonnet::decode_symb($symb))[2];
1.80 www 1957:
1958: $storestats{$courseid.'___'.$urlres.'___timestamp'}=time;
1959: $storestats{$courseid.'___'.$urlres.'___stdno'}=$num;
1960: $storestats{$courseid.'___'.$urlres.'___avetries'}=$mean;
1961: $storestats{$courseid.'___'.$urlres.'___difficulty'}=$DegOfDiff;
1962:
1963: $urlres=~/^(\w+)\/(\w+)/;
1964: &Apache::lonnet::put('nohist_resevaldata',\%storestats,$1,$2);
1965: }
1.81 matthew 1966: #
1967: # Return result
1968: #
1.66 matthew 1969: return { num_students => $num,
1970: tries => $tries,
1971: max_tries => $mod,
1972: mean_tries => $mean,
1973: std_tries => $STD,
1974: skew_tries => $SKEW,
1975: num_solved => $Solved,
1976: num_override => $solved,
1977: per_wrong => $wrongpercent,
1.81 matthew 1978: deg_of_diff => $DegOfDiff };
1.61 matthew 1979: }
1980:
1981: sub execute_SQL_request {
1982: my ($dbh,$request)=@_;
1983: # &Apache::lonnet::logthis($request);
1984: my $sth = $dbh->prepare($request);
1985: $sth->execute();
1986: my $row = $sth->fetchrow_arrayref();
1987: if (ref($row) eq 'ARRAY' && scalar(@$row)>0) {
1988: return @$row;
1989: }
1990: return ();
1991: }
1992:
1993:
1994: ################################################
1995: ################################################
1996:
1997: =pod
1998:
1999: =item &setup_table_names()
2000:
2001: input: course id
2002:
2003: output: none
2004:
2005: Cleans up the package variables for local caching.
2006:
2007: =cut
2008:
2009: ################################################
2010: ################################################
2011: sub setup_table_names {
2012: my ($courseid) = @_;
2013: if (! defined($courseid)) {
2014: $courseid = $ENV{'request.course.id'};
2015: }
2016: #
2017: if (! defined($current_course) || $current_course ne $courseid) {
2018: # Clear out variables
2019: $have_read_part_table = 0;
2020: undef(%ids_by_part);
2021: undef(%parts_by_id);
2022: $have_read_symb_table = 0;
2023: undef(%ids_by_symb);
2024: undef(%symbs_by_id);
2025: $have_read_student_table = 0;
2026: undef(%ids_by_student);
2027: undef(%students_by_id);
2028: #
2029: $current_course = $courseid;
2030: }
2031: #
2032: # Set up database names
2033: my $base_id = $courseid;
2034: $symb_table = $base_id.'_'.'symb';
2035: $part_table = $base_id.'_'.'part';
2036: $student_table = $base_id.'_'.'student';
1.87 matthew 2037: $studentdata_table = $base_id.'_'.'studentdata';
1.61 matthew 2038: $performance_table = $base_id.'_'.'performance';
2039: $parameters_table = $base_id.'_'.'parameters';
1.89 matthew 2040: $fulldump_part_table = $base_id.'_'.'partdata';
2041: $fulldump_response_table = $base_id.'_'.'responsedata';
2042: $fulldump_timestamp_table = $base_id.'_'.'timestampdata';
2043: #
2044: @Tables = (
2045: $symb_table,
2046: $part_table,
2047: $student_table,
2048: $studentdata_table,
2049: $performance_table,
2050: $parameters_table,
2051: $fulldump_part_table,
2052: $fulldump_response_table,
2053: $fulldump_timestamp_table,
2054: );
1.61 matthew 2055: return;
1.3 stredwic 2056: }
1.1 stredwic 2057:
1.35 matthew 2058: ################################################
2059: ################################################
2060:
2061: =pod
2062:
1.57 matthew 2063: =back
2064:
2065: =item End of Local Data Caching Subroutines
2066:
2067: =cut
2068:
2069: ################################################
2070: ################################################
2071:
1.89 matthew 2072: } # End scope of table identifiers
1.57 matthew 2073:
2074: ################################################
2075: ################################################
2076:
2077: =pod
2078:
2079: =head3 Classlist Subroutines
2080:
1.35 matthew 2081: =item &get_classlist();
2082:
2083: Retrieve the classist of a given class or of the current class. Student
2084: information is returned from the classlist.db file and, if needed,
2085: from the students environment.
2086:
2087: Optional arguments are $cid, $cdom, and $cnum (course id, course domain,
2088: and course number, respectively). Any omitted arguments will be taken
2089: from the current environment ($ENV{'request.course.id'},
2090: $ENV{'course.'.$cid.'.domain'}, and $ENV{'course.'.$cid.'.num'}).
2091:
2092: Returns a reference to a hash which contains:
2093: keys '$sname:$sdom'
1.54 bowersj2 2094: values [$sdom,$sname,$end,$start,$id,$section,$fullname,$status]
2095:
2096: The constant values CL_SDOM, CL_SNAME, CL_END, etc. can be used
2097: as indices into the returned list to future-proof clients against
2098: changes in the list order.
1.35 matthew 2099:
2100: =cut
2101:
2102: ################################################
2103: ################################################
1.54 bowersj2 2104:
2105: sub CL_SDOM { return 0; }
2106: sub CL_SNAME { return 1; }
2107: sub CL_END { return 2; }
2108: sub CL_START { return 3; }
2109: sub CL_ID { return 4; }
2110: sub CL_SECTION { return 5; }
2111: sub CL_FULLNAME { return 6; }
2112: sub CL_STATUS { return 7; }
1.35 matthew 2113:
2114: sub get_classlist {
2115: my ($cid,$cdom,$cnum) = @_;
2116: $cid = $cid || $ENV{'request.course.id'};
2117: $cdom = $cdom || $ENV{'course.'.$cid.'.domain'};
2118: $cnum = $cnum || $ENV{'course.'.$cid.'.num'};
1.57 matthew 2119: my $now = time;
1.35 matthew 2120: #
2121: my %classlist=&Apache::lonnet::dump('classlist',$cdom,$cnum);
2122: while (my ($student,$info) = each(%classlist)) {
1.60 matthew 2123: if ($student =~ /^(con_lost|error|no_such_host)/i) {
2124: &Apache::lonnet::logthis('get_classlist error for '.$cid.':'.$student);
2125: return undef;
2126: }
1.35 matthew 2127: my ($sname,$sdom) = split(/:/,$student);
2128: my @Values = split(/:/,$info);
2129: my ($end,$start,$id,$section,$fullname);
2130: if (@Values > 2) {
2131: ($end,$start,$id,$section,$fullname) = @Values;
2132: } else { # We have to get the data ourselves
2133: ($end,$start) = @Values;
1.37 matthew 2134: $section = &Apache::lonnet::getsection($sdom,$sname,$cid);
1.35 matthew 2135: my %info=&Apache::lonnet::get('environment',
2136: ['firstname','middlename',
2137: 'lastname','generation','id'],
2138: $sdom, $sname);
2139: my ($tmp) = keys(%info);
2140: if ($tmp =~/^(con_lost|error|no_such_host)/i) {
2141: $fullname = 'not available';
2142: $id = 'not available';
1.38 matthew 2143: &Apache::lonnet::logthis('unable to retrieve environment '.
2144: 'for '.$sname.':'.$sdom);
1.35 matthew 2145: } else {
2146: $fullname = &ProcessFullName(@info{qw/lastname generation
2147: firstname middlename/});
2148: $id = $info{'id'};
2149: }
1.36 matthew 2150: # Update the classlist with this students information
2151: if ($fullname ne 'not available') {
2152: my $enrolldata = join(':',$end,$start,$id,$section,$fullname);
2153: my $reply=&Apache::lonnet::cput('classlist',
2154: {$student => $enrolldata},
2155: $cdom,$cnum);
2156: if ($reply !~ /^(ok|delayed)/) {
2157: &Apache::lonnet::logthis('Unable to update classlist for '.
2158: 'student '.$sname.':'.$sdom.
2159: ' error:'.$reply);
2160: }
2161: }
1.35 matthew 2162: }
2163: my $status='Expired';
2164: if(((!$end) || $now < $end) && ((!$start) || ($now > $start))) {
2165: $status='Active';
2166: }
2167: $classlist{$student} =
2168: [$sdom,$sname,$end,$start,$id,$section,$fullname,$status];
2169: }
2170: if (wantarray()) {
2171: return (\%classlist,['domain','username','end','start','id',
2172: 'section','fullname','status']);
2173: } else {
2174: return \%classlist;
2175: }
2176: }
2177:
1.1 stredwic 2178: # ----- END HELPER FUNCTIONS --------------------------------------------
2179:
2180: 1;
2181: __END__
1.36 matthew 2182:
1.35 matthew 2183:
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