Annotation of loncom/interface/loncoursedata.pm, revision 1.89
1.1 stredwic 1: # The LearningOnline Network with CAPA
2: #
1.89 ! matthew 3: # $Id: loncoursedata.pm,v 1.88 2003/09/24 18:01:01 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;
1.87 matthew 200: }
1.45 matthew 201: my $assessment = { title => $title,
202: src => $src,
203: symb => $symb,
204: type => 'assessment',
1.53 matthew 205: parts => $parts,
206: num_parts => scalar(@$parts),
1.87 matthew 207: partdata => \%partdata,
1.45 matthew 208: };
1.49 matthew 209: push(@Assessments,$assessment);
1.45 matthew 210: push(@{$currentmap->{'contents'}},$assessment);
211: $currentmap->{'num_assess'}++;
1.53 matthew 212: $currentmap->{'num_assess_parts'}+= scalar(@$parts);
1.45 matthew 213: }
1.58 matthew 214: $navmap->untieHashes();
1.49 matthew 215: return ($top,\@Sequences,\@Assessments);
1.45 matthew 216: }
1.50 matthew 217:
1.4 stredwic 218: sub LoadDiscussion {
1.13 stredwic 219: my ($courseID)=@_;
1.5 minaeibi 220: my %Discuss=();
221: my %contrib=&Apache::lonnet::dump(
222: $courseID,
223: $ENV{'course.'.$courseID.'.domain'},
224: $ENV{'course.'.$courseID.'.num'});
225:
226: #my %contrib=&DownloadCourseInformation($name, $courseID, 0);
227:
1.4 stredwic 228: foreach my $temp(keys %contrib) {
229: if ($temp=~/^version/) {
230: my $ver=$contrib{$temp};
231: my ($dummy,$prb)=split(':',$temp);
232: for (my $idx=1; $idx<=$ver; $idx++ ) {
233: my $name=$contrib{"$idx:$prb:sendername"};
1.5 minaeibi 234: $Discuss{"$name:$prb"}=$idx;
1.4 stredwic 235: }
236: }
237: }
1.5 minaeibi 238:
239: return \%Discuss;
1.1 stredwic 240: }
241:
1.71 matthew 242: ################################################
243: ################################################
244:
245: =pod
246:
247: =item &GetUserName(username,userdomain)
248:
249: Returns a hash with the following entries:
250: 'firstname', 'middlename', 'lastname', 'generation', and 'fullname'
251:
252: 'fullname' is the result of &Apache::loncoursedata::ProcessFullName.
253:
254: =cut
255:
256: ################################################
257: ################################################
258: sub GetUserName {
259: my ($username,$userdomain) = @_;
260: $username = $ENV{'user.name'} if (! defined($username));
261: $userdomain = $ENV{'user.domain'} if (! defined($username));
262: my %userenv = &Apache::lonnet::get('environment',
263: ['firstname','middlename','lastname','generation'],
264: $userdomain,$username);
265: $userenv{'fullname'} = &ProcessFullName($userenv{'lastname'},
266: $userenv{'generation'},
267: $userenv{'firstname'},
268: $userenv{'middlename'});
269: return %userenv;
270: }
271:
272: ################################################
273: ################################################
274:
1.1 stredwic 275: =pod
276:
277: =item &ProcessFullName()
278:
279: Takes lastname, generation, firstname, and middlename (or some partial
280: set of this data) and returns the full name version as a string. Format
281: is Lastname generation, firstname middlename or a subset of this.
282:
283: =cut
284:
1.71 matthew 285: ################################################
286: ################################################
1.1 stredwic 287: sub ProcessFullName {
288: my ($lastname, $generation, $firstname, $middlename)=@_;
289: my $Str = '';
290:
1.34 matthew 291: # Strip whitespace preceeding & following name components.
292: $lastname =~ s/(\s+$|^\s+)//g;
293: $generation =~ s/(\s+$|^\s+)//g;
294: $firstname =~ s/(\s+$|^\s+)//g;
295: $middlename =~ s/(\s+$|^\s+)//g;
296:
1.1 stredwic 297: if($lastname ne '') {
1.34 matthew 298: $Str .= $lastname;
299: $Str .= ' '.$generation if ($generation ne '');
300: $Str .= ',';
301: $Str .= ' '.$firstname if ($firstname ne '');
302: $Str .= ' '.$middlename if ($middlename ne '');
1.1 stredwic 303: } else {
1.34 matthew 304: $Str .= $firstname if ($firstname ne '');
305: $Str .= ' '.$middlename if ($middlename ne '');
306: $Str .= ' '.$generation if ($generation ne '');
1.1 stredwic 307: }
308:
309: return $Str;
310: }
311:
1.46 matthew 312: ################################################
313: ################################################
314:
315: =pod
316:
1.47 matthew 317: =item &make_into_hash($values);
318:
319: Returns a reference to a hash as described by $values. $values is
320: assumed to be the result of
1.57 matthew 321: join(':',map {&Apache::lonnet::escape($_)} %orighash);
1.47 matthew 322:
323: This is a helper function for get_current_state.
324:
325: =cut
326:
327: ################################################
328: ################################################
329: sub make_into_hash {
330: my $values = shift;
331: my %tmp = map { &Apache::lonnet::unescape($_); }
332: split(':',$values);
333: return \%tmp;
334: }
335:
336:
337: ################################################
338: ################################################
339:
340: =pod
341:
1.57 matthew 342: =head1 LOCAL DATA CACHING SUBROUTINES
343:
344: The local caching is done using MySQL. There is no fall-back implementation
345: if MySQL is not running.
346:
347: The programmers interface is to call &get_current_state() or some other
348: primary interface subroutine (described below). The internals of this
349: storage system are documented here.
350:
351: There are six tables used to store student performance data (the results of
352: a dumpcurrent). Each of these tables is created in MySQL with a name of
353: $courseid_*****, where ***** is 'symb', 'part', or whatever is appropriate
354: for the table. The tables and their purposes are described below.
355:
356: Some notes before we get started.
357:
358: Each table must have a PRIMARY KEY, which is a column or set of columns which
359: will serve to uniquely identify a row of data. NULL is not allowed!
360:
361: INDEXes work best on integer data.
362:
363: JOIN is used to combine data from many tables into one output.
364:
365: lonmysql.pm is used for some of the interface, specifically the table creation
366: calls. The inserts are done in bulk by directly calling the database handler.
367: The SELECT ... JOIN statement used to retrieve the data does not have an
368: interface in lonmysql.pm and I shudder at the thought of writing one.
369:
370: =head3 Table Descriptions
371:
372: =over 4
373:
1.89 ! matthew 374: =item Tables used to store meta information
! 375:
! 376: The following tables hold data required to keep track of the current status
! 377: of a students data in the tables or to look up the students data in the tables.
! 378:
! 379: =over 4
! 380:
1.57 matthew 381: =item $symb_table
382:
383: The symb_table has two columns. The first is a 'symb_id' and the second
384: is the text name for the 'symb' (limited to 64k). The 'symb_id' is generated
385: automatically by MySQL so inserts should be done on this table with an
386: empty first element. This table has its PRIMARY KEY on the 'symb_id'.
387:
388: =item $part_table
389:
390: The part_table has two columns. The first is a 'part_id' and the second
391: is the text name for the 'part' (limited to 100 characters). The 'part_id' is
392: generated automatically by MySQL so inserts should be done on this table with
393: an empty first element. This table has its PRIMARY KEY on the 'part' (100
394: characters) and a KEY on 'part_id'.
395:
396: =item $student_table
397:
398: The student_table has two columns. The first is a 'student_id' and the second
399: is the text description of the 'student' (typically username:domain) (less
400: than 100 characters). The 'student_id' is automatically generated by MySQL.
401: The use of the name 'student_id' is loaded, I know, but this ID is used ONLY
402: internally to the MySQL database and is not the same as the students ID
403: (stored in the students environment). This table has its PRIMARY KEY on the
404: 'student' (100 characters).
405:
1.87 matthew 406: =item $studentdata_table
1.57 matthew 407:
1.89 ! matthew 408: The studentdata_table has four columns: 'student_id' (the unique id of
! 409: the student), 'updatetime' (the time the students data was last updated),
! 410: 'fullupdatetime' (the time the students full data was last updated),
! 411: 'section', and 'classification'( the students current classification).
! 412: This table has its PRIMARY KEY on 'student_id'.
! 413:
! 414: =back
! 415:
! 416: =item Tables used to store current status data
! 417:
! 418: The following tables store data only about the students current status on
! 419: a problem, meaning only the data related to the last attempt on a problem.
! 420:
! 421: =over 4
1.57 matthew 422:
423: =item $performance_table
424:
425: The performance_table has 9 columns. The first three are 'symb_id',
426: 'student_id', and 'part_id'. These comprise the PRIMARY KEY for this table
427: and are directly related to the $symb_table, $student_table, and $part_table
428: described above. MySQL does better indexing on numeric items than text,
429: so we use these three "index tables". The remaining columns are
430: 'solved', 'tries', 'awarded', 'award', 'awarddetail', and 'timestamp'.
431: These are either the MySQL type TINYTEXT or various integers ('tries' and
432: 'timestamp'). This table has KEYs of 'student_id' and 'symb_id'.
433: For use of this table, see the functions described below.
434:
435: =item $parameters_table
436:
437: The parameters_table holds the data that does not fit neatly into the
438: performance_table. The parameters table has four columns: 'symb_id',
439: 'student_id', 'parameter', and 'value'. 'symb_id', 'student_id', and
440: 'parameter' comprise the PRIMARY KEY for this table. 'parameter' is
441: limited to 255 characters. 'value' is limited to 64k characters.
442:
443: =back
444:
1.89 ! matthew 445: =item Tables used for storing historic data
! 446:
! 447: The following tables are used to store almost all of the transactions a student
! 448: has made on a homework problem. See loncapa/docs/homework/datastorage for
! 449: specific information about each of the parameters stored.
! 450:
! 451: =over 4
! 452:
! 453: =item $fulldump_response_table
! 454:
! 455: The response table holds data (documented in loncapa/docs/homework/datastorage)
! 456: associated with a particular response id which is stored when a student
! 457: attempts a problem. The following are the columns of the table, in order:
! 458: 'symb_id','part_id','response_id','student_id','transaction','tries',
! 459: 'awarddetail', 'awarded','response_specific' (data particular to the response
! 460: type), 'response_specific_value', and 'submission (the text of the students
! 461: submission). The primary key is based on the first five columns listed above.
! 462:
! 463: =item $fulldump_part_table
! 464:
! 465: The part table holds data (documented in loncapa/docs/homework/datastorage)
! 466: associated with a particular part id which is stored when a student attempts
! 467: a problem. The following are the columns of the table, in order:
! 468: 'symb_id','part_id','student_id','transaction','tries','award','awarded',
! 469: and 'previous'. The primary key is based on the first five columns listed
! 470: above.
! 471:
! 472: =item $fulldump_timestamp_table
! 473:
! 474: The timestamp table holds the timestamps of the transactions which are
! 475: stored in $fulldump_response_table and $fulldump_part_table. This data is
! 476: about both the response and part data. Columns: 'symb_id','student_id',
! 477: 'transaction', and 'timestamp'.
! 478: The primary key is based on the first 3 columns.
! 479:
! 480: =back
! 481:
! 482: =back
! 483:
1.57 matthew 484: =head3 Important Subroutines
485:
486: Here is a brief overview of the subroutines which are likely to be of
487: interest:
488:
489: =over 4
490:
491: =item &get_current_state(): programmers interface.
492:
493: =item &init_dbs(): table creation
494:
495: =item &update_student_data(): data storage calls
496:
497: =item &get_student_data_from_performance_cache(): data retrieval
498:
499: =back
500:
501: =head3 Main Documentation
502:
503: =over 4
504:
505: =cut
506:
507: ################################################
508: ################################################
509:
510: ################################################
511: ################################################
1.89 ! matthew 512: { # Begin scope of table identifiers
1.57 matthew 513:
514: my $current_course ='';
515: my $symb_table;
516: my $part_table;
517: my $student_table;
1.87 matthew 518: my $studentdata_table;
1.57 matthew 519: my $performance_table;
520: my $parameters_table;
1.89 ! matthew 521: my $fulldump_response_table;
! 522: my $fulldump_part_table;
! 523: my $fulldump_timestamp_table;
1.57 matthew 524:
1.89 ! matthew 525: my @Tables;
1.57 matthew 526: ################################################
527: ################################################
528:
529: =pod
530:
531: =item &init_dbs()
532:
533: Input: course id
534:
535: Output: 0 on success, positive integer on error
536:
537: This routine issues the calls to lonmysql to create the tables used to
538: store student data.
539:
540: =cut
541:
542: ################################################
543: ################################################
544: sub init_dbs {
545: my $courseid = shift;
546: &setup_table_names($courseid);
547: #
1.73 matthew 548: # Drop any of the existing tables
1.89 ! matthew 549: foreach my $table (@Tables) {
1.73 matthew 550: &Apache::lonmysql::drop_table($table);
551: }
552: #
1.57 matthew 553: # Note - changes to this table must be reflected in the code that
554: # stores the data (calls &Apache::lonmysql::store_row with this table
555: # id
556: my $symb_table_def = {
557: id => $symb_table,
558: permanent => 'no',
559: columns => [{ name => 'symb_id',
560: type => 'MEDIUMINT UNSIGNED',
561: restrictions => 'NOT NULL',
562: auto_inc => 'yes', },
563: { name => 'symb',
564: type => 'MEDIUMTEXT',
565: restrictions => 'NOT NULL'},
566: ],
567: 'PRIMARY KEY' => ['symb_id'],
568: };
569: #
570: my $part_table_def = {
571: id => $part_table,
572: permanent => 'no',
573: columns => [{ name => 'part_id',
574: type => 'MEDIUMINT UNSIGNED',
575: restrictions => 'NOT NULL',
576: auto_inc => 'yes', },
577: { name => 'part',
578: type => 'VARCHAR(100)',
579: restrictions => 'NOT NULL'},
580: ],
581: 'PRIMARY KEY' => ['part (100)'],
582: 'KEY' => [{ columns => ['part_id']},],
583: };
584: #
585: my $student_table_def = {
586: id => $student_table,
587: permanent => 'no',
588: columns => [{ name => 'student_id',
589: type => 'MEDIUMINT UNSIGNED',
590: restrictions => 'NOT NULL',
591: auto_inc => 'yes', },
592: { name => 'student',
593: type => 'VARCHAR(100)',
594: restrictions => 'NOT NULL'},
1.85 matthew 595: { name => 'classification',
596: type => 'varchar(100)', },
1.57 matthew 597: ],
598: 'PRIMARY KEY' => ['student (100)'],
599: 'KEY' => [{ columns => ['student_id']},],
600: };
601: #
1.87 matthew 602: my $studentdata_table_def = {
603: id => $studentdata_table,
1.57 matthew 604: permanent => 'no',
1.87 matthew 605: columns => [{ name => 'student_id',
606: type => 'MEDIUMINT UNSIGNED',
1.57 matthew 607: restrictions => 'NOT NULL UNIQUE',},
608: { name => 'updatetime',
1.89 ! matthew 609: type => 'INT UNSIGNED'},
! 610: { name => 'fullupdatetime',
! 611: type => 'INT UNSIGNED'},
1.87 matthew 612: { name => 'section',
613: type => 'VARCHAR(100)'},
614: { name => 'classification',
615: type => 'VARCHAR(100)', },
1.57 matthew 616: ],
1.87 matthew 617: 'PRIMARY KEY' => ['student_id'],
1.57 matthew 618: };
619: #
620: my $performance_table_def = {
621: id => $performance_table,
622: permanent => 'no',
623: columns => [{ name => 'symb_id',
624: type => 'MEDIUMINT UNSIGNED',
625: restrictions => 'NOT NULL' },
626: { name => 'student_id',
627: type => 'MEDIUMINT UNSIGNED',
628: restrictions => 'NOT NULL' },
629: { name => 'part_id',
630: type => 'MEDIUMINT UNSIGNED',
631: restrictions => 'NOT NULL' },
1.73 matthew 632: { name => 'part',
633: type => 'VARCHAR(100)',
634: restrictions => 'NOT NULL'},
1.57 matthew 635: { name => 'solved',
636: type => 'TINYTEXT' },
637: { name => 'tries',
638: type => 'SMALLINT UNSIGNED' },
639: { name => 'awarded',
640: type => 'TINYTEXT' },
641: { name => 'award',
642: type => 'TINYTEXT' },
643: { name => 'awarddetail',
644: type => 'TINYTEXT' },
645: { name => 'timestamp',
646: type => 'INT UNSIGNED'},
647: ],
648: 'PRIMARY KEY' => ['symb_id','student_id','part_id'],
649: 'KEY' => [{ columns=>['student_id'] },
650: { columns=>['symb_id'] },],
651: };
652: #
1.89 ! matthew 653: my $fulldump_part_table_def = {
! 654: id => $fulldump_part_table,
! 655: permanent => 'no',
! 656: columns => [
! 657: { name => 'symb_id',
! 658: type => 'MEDIUMINT UNSIGNED',
! 659: restrictions => 'NOT NULL' },
! 660: { name => 'part_id',
! 661: type => 'MEDIUMINT UNSIGNED',
! 662: restrictions => 'NOT NULL' },
! 663: { name => 'student_id',
! 664: type => 'MEDIUMINT UNSIGNED',
! 665: restrictions => 'NOT NULL' },
! 666: { name => 'transaction',
! 667: type => 'MEDIUMINT UNSIGNED',
! 668: restrictions => 'NOT NULL' },
! 669: { name => 'tries',
! 670: type => 'SMALLINT UNSIGNED',
! 671: restrictions => 'NOT NULL' },
! 672: { name => 'award',
! 673: type => 'TINYTEXT' },
! 674: { name => 'awarded',
! 675: type => 'TINYTEXT' },
! 676: { name => 'previous',
! 677: type => 'SMALLINT UNSIGNED' },
! 678: # { name => 'regrader',
! 679: # type => 'TINYTEXT' },
! 680: # { name => 'afterduedate',
! 681: # type => 'TINYTEXT' },
! 682: ],
! 683: 'PRIMARY KEY' => ['symb_id','part_id','student_id','transaction'],
! 684: 'KEY' => [
! 685: { columns=>['symb_id'] },
! 686: { columns=>['part_id'] },
! 687: { columns=>['student_id'] },
! 688: ],
! 689: };
! 690: #
! 691: my $fulldump_response_table_def = {
! 692: id => $fulldump_response_table,
! 693: permanent => 'no',
! 694: columns => [
! 695: { name => 'symb_id',
! 696: type => 'MEDIUMINT UNSIGNED',
! 697: restrictions => 'NOT NULL' },
! 698: { name => 'part_id',
! 699: type => 'MEDIUMINT UNSIGNED',
! 700: restrictions => 'NOT NULL' },
! 701: { name => 'response_id',
! 702: type => 'MEDIUMINT UNSIGNED',
! 703: restrictions => 'NOT NULL' },
! 704: { name => 'student_id',
! 705: type => 'MEDIUMINT UNSIGNED',
! 706: restrictions => 'NOT NULL' },
! 707: { name => 'transaction',
! 708: type => 'MEDIUMINT UNSIGNED',
! 709: restrictions => 'NOT NULL' },
! 710: { name => 'tries',
! 711: type => 'SMALLINT UNSIGNED',
! 712: restrictions => 'NOT NULL' },
! 713: { name => 'awarddetail',
! 714: type => 'TINYTEXT' },
! 715: { name => 'awarded',
! 716: type => 'TINYTEXT' },
! 717: # { name => 'message',
! 718: # type => 'CHAR' },
! 719: { name => 'response_specific',
! 720: type => 'TINYTEXT' },
! 721: { name => 'response_specific_value',
! 722: type => 'TINYTEXT' },
! 723: { name => 'submission',
! 724: type => 'TEXT'},
! 725: ],
! 726: 'PRIMARY KEY' => ['symb_id','part_id','response_id','student_id',
! 727: 'transaction'],
! 728: 'KEY' => [
! 729: { columns=>['symb_id'] },
! 730: { columns=>['part_id','response_id'] },
! 731: { columns=>['student_id'] },
! 732: ],
! 733: };
! 734: my $fulldump_timestamp_table_def = {
! 735: id => $fulldump_timestamp_table,
! 736: permanent => 'no',
! 737: columns => [
! 738: { name => 'symb_id',
! 739: type => 'MEDIUMINT UNSIGNED',
! 740: restrictions => 'NOT NULL' },
! 741: { name => 'student_id',
! 742: type => 'MEDIUMINT UNSIGNED',
! 743: restrictions => 'NOT NULL' },
! 744: { name => 'transaction',
! 745: type => 'MEDIUMINT UNSIGNED',
! 746: restrictions => 'NOT NULL' },
! 747: { name => 'timestamp',
! 748: type => 'INT UNSIGNED'},
! 749: ],
! 750: 'PRIMARY KEY' => ['symb_id','student_id','transaction'],
! 751: 'KEY' => [
! 752: { columns=>['symb_id'] },
! 753: { columns=>['student_id'] },
! 754: { columns=>['transaction'] },
! 755: ],
! 756: };
! 757:
! 758: #
1.57 matthew 759: my $parameters_table_def = {
760: id => $parameters_table,
761: permanent => 'no',
762: columns => [{ name => 'symb_id',
763: type => 'MEDIUMINT UNSIGNED',
764: restrictions => 'NOT NULL' },
765: { name => 'student_id',
766: type => 'MEDIUMINT UNSIGNED',
767: restrictions => 'NOT NULL' },
768: { name => 'parameter',
769: type => 'TINYTEXT',
770: restrictions => 'NOT NULL' },
771: { name => 'value',
772: type => 'MEDIUMTEXT' },
773: ],
774: 'PRIMARY KEY' => ['symb_id','student_id','parameter (255)'],
775: };
776: #
777: # Create the tables
778: my $tableid;
779: $tableid = &Apache::lonmysql::create_table($symb_table_def);
780: if (! defined($tableid)) {
781: &Apache::lonnet::logthis("error creating symb_table: ".
782: &Apache::lonmysql::get_error());
783: return 1;
784: }
785: #
786: $tableid = &Apache::lonmysql::create_table($part_table_def);
787: if (! defined($tableid)) {
788: &Apache::lonnet::logthis("error creating part_table: ".
789: &Apache::lonmysql::get_error());
790: return 2;
791: }
792: #
793: $tableid = &Apache::lonmysql::create_table($student_table_def);
794: if (! defined($tableid)) {
795: &Apache::lonnet::logthis("error creating student_table: ".
796: &Apache::lonmysql::get_error());
797: return 3;
798: }
799: #
1.87 matthew 800: $tableid = &Apache::lonmysql::create_table($studentdata_table_def);
1.57 matthew 801: if (! defined($tableid)) {
1.87 matthew 802: &Apache::lonnet::logthis("error creating studentdata_table: ".
1.57 matthew 803: &Apache::lonmysql::get_error());
804: return 4;
805: }
806: #
807: $tableid = &Apache::lonmysql::create_table($performance_table_def);
808: if (! defined($tableid)) {
809: &Apache::lonnet::logthis("error creating preformance_table: ".
810: &Apache::lonmysql::get_error());
811: return 5;
812: }
813: #
814: $tableid = &Apache::lonmysql::create_table($parameters_table_def);
815: if (! defined($tableid)) {
816: &Apache::lonnet::logthis("error creating parameters_table: ".
817: &Apache::lonmysql::get_error());
818: return 6;
819: }
1.89 ! matthew 820: #
! 821: $tableid = &Apache::lonmysql::create_table($fulldump_part_table_def);
! 822: if (! defined($tableid)) {
! 823: &Apache::lonnet::logthis("error creating fulldump_part_table: ".
! 824: &Apache::lonmysql::get_error());
! 825: return 7;
! 826: }
! 827: #
! 828: $tableid = &Apache::lonmysql::create_table($fulldump_response_table_def);
! 829: if (! defined($tableid)) {
! 830: &Apache::lonnet::logthis("error creating fulldump_response_table: ".
! 831: &Apache::lonmysql::get_error());
! 832: return 8;
! 833: }
! 834: $tableid = &Apache::lonmysql::create_table($fulldump_timestamp_table_def);
! 835: if (! defined($tableid)) {
! 836: &Apache::lonnet::logthis("error creating fulldump_timestamp_table: ".
! 837: &Apache::lonmysql::get_error());
! 838: return 9;
! 839: }
1.57 matthew 840: return 0;
1.70 matthew 841: }
842:
843: ################################################
844: ################################################
845:
846: =pod
847:
848: =item &delete_caches()
849:
850: =cut
851:
852: ################################################
853: ################################################
854: sub delete_caches {
855: my $courseid = shift;
856: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
857: #
858: &setup_table_names($courseid);
859: #
860: my $dbh = &Apache::lonmysql::get_dbh();
1.89 ! matthew 861: foreach my $table (@Tables) {
1.70 matthew 862: my $command = 'DROP TABLE '.$table.';';
863: $dbh->do($command);
864: if ($dbh->err) {
865: &Apache::lonnet::logthis($command.' resulted in error: '.$dbh->errstr);
866: }
867: }
868: return;
1.57 matthew 869: }
870:
871: ################################################
872: ################################################
873:
874: =pod
875:
876: =item &get_part_id()
877:
878: Get the MySQL id of a problem part string.
879:
880: Input: $part
881:
882: Output: undef on error, integer $part_id on success.
883:
884: =item &get_part()
885:
886: Get the string describing a part from the MySQL id of the problem part.
887:
888: Input: $part_id
889:
890: Output: undef on error, $part string on success.
891:
892: =cut
893:
894: ################################################
895: ################################################
896:
1.61 matthew 897: my $have_read_part_table = 0;
1.57 matthew 898: my %ids_by_part;
899: my %parts_by_id;
900:
901: sub get_part_id {
902: my ($part) = @_;
1.61 matthew 903: $part = 0 if (! defined($part));
904: if (! $have_read_part_table) {
905: my @Result = &Apache::lonmysql::get_rows($part_table);
906: foreach (@Result) {
907: $ids_by_part{$_->[1]}=$_->[0];
908: }
909: $have_read_part_table = 1;
910: }
1.57 matthew 911: if (! exists($ids_by_part{$part})) {
912: &Apache::lonmysql::store_row($part_table,[undef,$part]);
913: undef(%ids_by_part);
914: my @Result = &Apache::lonmysql::get_rows($part_table);
915: foreach (@Result) {
916: $ids_by_part{$_->[1]}=$_->[0];
917: }
918: }
919: return $ids_by_part{$part} if (exists($ids_by_part{$part}));
920: return undef; # error
921: }
922:
923: sub get_part {
924: my ($part_id) = @_;
925: if (! exists($parts_by_id{$part_id}) ||
926: ! defined($parts_by_id{$part_id}) ||
927: $parts_by_id{$part_id} eq '') {
928: my @Result = &Apache::lonmysql::get_rows($part_table);
929: foreach (@Result) {
930: $parts_by_id{$_->[0]}=$_->[1];
931: }
932: }
933: return $parts_by_id{$part_id} if(exists($parts_by_id{$part_id}));
934: return undef; # error
935: }
936:
937: ################################################
938: ################################################
939:
940: =pod
941:
942: =item &get_symb_id()
943:
944: Get the MySQL id of a symb.
945:
946: Input: $symb
947:
948: Output: undef on error, integer $symb_id on success.
949:
950: =item &get_symb()
951:
952: Get the symb associated with a MySQL symb_id.
953:
954: Input: $symb_id
955:
956: Output: undef on error, $symb on success.
957:
958: =cut
959:
960: ################################################
961: ################################################
962:
1.61 matthew 963: my $have_read_symb_table = 0;
1.57 matthew 964: my %ids_by_symb;
965: my %symbs_by_id;
966:
967: sub get_symb_id {
968: my ($symb) = @_;
1.61 matthew 969: if (! $have_read_symb_table) {
970: my @Result = &Apache::lonmysql::get_rows($symb_table);
971: foreach (@Result) {
972: $ids_by_symb{$_->[1]}=$_->[0];
973: }
974: $have_read_symb_table = 1;
975: }
1.57 matthew 976: if (! exists($ids_by_symb{$symb})) {
977: &Apache::lonmysql::store_row($symb_table,[undef,$symb]);
978: undef(%ids_by_symb);
979: my @Result = &Apache::lonmysql::get_rows($symb_table);
980: foreach (@Result) {
981: $ids_by_symb{$_->[1]}=$_->[0];
982: }
983: }
984: return $ids_by_symb{$symb} if(exists( $ids_by_symb{$symb}));
985: return undef; # error
986: }
987:
988: sub get_symb {
989: my ($symb_id) = @_;
990: if (! exists($symbs_by_id{$symb_id}) ||
991: ! defined($symbs_by_id{$symb_id}) ||
992: $symbs_by_id{$symb_id} eq '') {
993: my @Result = &Apache::lonmysql::get_rows($symb_table);
994: foreach (@Result) {
995: $symbs_by_id{$_->[0]}=$_->[1];
996: }
997: }
998: return $symbs_by_id{$symb_id} if(exists( $symbs_by_id{$symb_id}));
999: return undef; # error
1000: }
1001:
1002: ################################################
1003: ################################################
1004:
1005: =pod
1006:
1007: =item &get_student_id()
1008:
1009: Get the MySQL id of a student.
1010:
1011: Input: $sname, $dom
1012:
1013: Output: undef on error, integer $student_id on success.
1014:
1015: =item &get_student()
1016:
1017: Get student username:domain associated with the MySQL student_id.
1018:
1019: Input: $student_id
1020:
1021: Output: undef on error, string $student (username:domain) on success.
1022:
1023: =cut
1024:
1025: ################################################
1026: ################################################
1027:
1.61 matthew 1028: my $have_read_student_table = 0;
1.57 matthew 1029: my %ids_by_student;
1030: my %students_by_id;
1031:
1032: sub get_student_id {
1033: my ($sname,$sdom) = @_;
1034: my $student = $sname.':'.$sdom;
1.61 matthew 1035: if (! $have_read_student_table) {
1036: my @Result = &Apache::lonmysql::get_rows($student_table);
1037: foreach (@Result) {
1038: $ids_by_student{$_->[1]}=$_->[0];
1039: }
1040: $have_read_student_table = 1;
1041: }
1.57 matthew 1042: if (! exists($ids_by_student{$student})) {
1.85 matthew 1043: &Apache::lonmysql::store_row($student_table,[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: }
1067:
1068: ################################################
1069: ################################################
1070:
1071: =pod
1072:
1.89 ! matthew 1073: =item &update_full_student_data($sname,$sdom,$courseid)
! 1074:
! 1075: Does a lonnet::dump on a student to populate the courses tables.
! 1076:
! 1077: Input: $sname, $sdom, $courseid
! 1078:
! 1079: Output: $returnstatus
! 1080:
! 1081: $returnstatus is a string describing any errors that occured. 'okay' is the
! 1082: default.
! 1083:
! 1084: This subroutine loads a students data using lonnet::dump and inserts
! 1085: it into the MySQL database. The inserts are done on three tables,
! 1086: $fulldump_response_table, $fulldump_part_table, and $fulldump_timestamp_table.
! 1087: The INSERT calls are made directly by this subroutine, not through lonmysql
! 1088: because we do a 'bulk'insert which takes advantage of MySQLs non-SQL
! 1089: compliant INSERT command to insert multiple rows at a time.
! 1090: If anything has gone wrong during this process, $returnstatus is updated with
! 1091: a description of the error.
! 1092:
! 1093: Once the "fulldump" tables are updated, the tables used for chart and
! 1094: spreadsheet (which hold only the current state of the student on their
! 1095: homework, not historical data) are updated. If all updates have occured
! 1096: successfully, the studentdata table is updated to reflect the time of the
! 1097: update.
! 1098:
! 1099: Notice we do not insert the data and immediately query it. This means it
! 1100: is possible for there to be data returned this first time that is not
! 1101: available the second time. CYA.
! 1102:
! 1103: =cut
! 1104:
! 1105: ################################################
! 1106: ################################################
! 1107: sub update_full_student_data {
! 1108: my ($sname,$sdom,$courseid) = @_;
! 1109: #
! 1110: # Set up database names
! 1111: &setup_table_names($courseid);
! 1112: #
! 1113: my $student_id = &get_student_id($sname,$sdom);
! 1114: my $student = $sname.':'.$sdom;
! 1115: #
! 1116: my $returnstatus = 'okay';
! 1117: #
! 1118: # Download students data
! 1119: my $time_of_retrieval = time;
! 1120: my @tmp = &Apache::lonnet::dump($courseid,$sdom,$sname);
! 1121: if (@tmp && $tmp[0] =~ /^error/) {
! 1122: $returnstatus = 'error retrieving full student data';
! 1123: return $returnstatus;
! 1124: } elsif (! @tmp) {
! 1125: $returnstatus = 'okay: no student data';
! 1126: return $returnstatus;
! 1127: }
! 1128: my %studentdata = @tmp;
! 1129: #
! 1130: # Get database handle and clean out the tables
! 1131: my $dbh = &Apache::lonmysql::get_dbh();
! 1132: $dbh->do('DELETE FROM '.$fulldump_response_table.' WHERE student_id='.
! 1133: $student_id);
! 1134: $dbh->do('DELETE FROM '.$fulldump_part_table.' WHERE student_id='.
! 1135: $student_id);
! 1136: $dbh->do('DELETE FROM '.$fulldump_timestamp_table.' WHERE student_id='.
! 1137: $student_id);
! 1138: #
! 1139: # Parse and store the data into a form we can handle
! 1140: my $partdata;
! 1141: my $respdata;
! 1142: while (my ($key,$value) = each(%studentdata)) {
! 1143: next if ($key =~ /^(\d+):(resource$|subnum$|keys:)/);
! 1144: my ($transaction,$symb,$parameter) = split(':',$key);
! 1145: my $symb_id = &get_symb_id($symb);
! 1146: if ($parameter eq 'timestamp') {
! 1147: # We can deal with 'timestamp' right away
! 1148: my @timestamp_storage = ($symb_id,$student_id,
! 1149: $transaction,$value);
! 1150: my $store_command = 'INSERT INTO '.$fulldump_timestamp_table.
! 1151: " VALUES ('".join("','",@timestamp_storage)."');";
! 1152: $dbh->do($store_command);
! 1153: if ($dbh->err()) {
! 1154: &Apache::lonnet::logthis('unable to execute '.$store_command);
! 1155: &Apache::lonnet::logthis($dbh->errstr());
! 1156: }
! 1157: next;
! 1158: } elsif ($parameter eq 'version') {
! 1159: next;
! 1160: } elsif ($parameter =~ /^resource\.(.*)\.(tries|award|awarded|previous|solved|awarddetail|submission)\s*$/){
! 1161: # we do not have enough information to store an
! 1162: # entire row, so we save it up until later.
! 1163: my ($part_and_resp_id,$field) = ($1,$2);
! 1164: my ($part,$part_id,$resp,$resp_id);
! 1165: if ($part_and_resp_id =~ /\./) {
! 1166: ($part,$resp) = split(/\./,$part_and_resp_id);
! 1167: $part_id = &get_part_id($part);
! 1168: $resp_id = &get_part_id($resp);
! 1169: } else {
! 1170: $part_id = &get_part_id($part_and_resp_id);
! 1171: }
! 1172: if ($field =~ /^(tries|award|awarded|previous)$/) {
! 1173: $partdata->{$symb_id}->{$part_id}->{$transaction}->{$field}=$value;
! 1174: }
! 1175: if (defined($resp_id) &&
! 1176: $field =~ /^(tries|awarddetail|awarded|submission)$/) {
! 1177: if ($field eq 'submission') {
! 1178: # We have to be careful with user supplied input.
! 1179: # most of the time we are okay because it is escaped.
! 1180: # However, there is one wrinkle: submissions which end in
! 1181: # and odd number of '\' cause insert errors to occur.
! 1182: # Best trap this somehow...
! 1183: my ($offensive_string) = ($value =~ /(\\+)$/);
! 1184: if (length($offensive_string) % 2) {
! 1185: $value =~ s/\\$/\\\\/;
! 1186: }
! 1187: }
! 1188: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{$field}=$value;
! 1189: }
! 1190: }
! 1191: }
! 1192: ##
! 1193: ## Store the part data
! 1194: my $store_command = 'INSERT INTO '.$fulldump_part_table.
! 1195: ' VALUES '."\n";
! 1196: my $store_rows = 0;
! 1197: while (my ($symb_id,$hash1) = each (%$partdata)) {
! 1198: while (my ($part_id,$hash2) = each (%$hash1)) {
! 1199: while (my ($transaction,$data) = each (%$hash2)) {
! 1200: $store_command .= "('".join("','",$symb_id,$part_id,
! 1201: $student_id,
! 1202: $transaction,
! 1203: $data->{'tries'},
! 1204: $data->{'award'},
! 1205: $data->{'awarded'},
! 1206: $data->{'previous'})."'),";
! 1207: $store_rows++;
! 1208: }
! 1209: }
! 1210: }
! 1211: if ($store_rows) {
! 1212: chop($store_command);
! 1213: $dbh->do($store_command);
! 1214: if ($dbh->err) {
! 1215: $returnstatus = 'error storing part data';
! 1216: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
! 1217: &Apache::lonnet::logthis("While attempting\n".$store_command);
! 1218: }
! 1219: }
! 1220: ##
! 1221: ## Store the response data
! 1222: $store_command = 'INSERT INTO '.$fulldump_response_table.
! 1223: ' VALUES '."\n";
! 1224: $store_rows = 0;
! 1225: while (my ($symb_id,$hash1) = each (%$respdata)) {
! 1226: while (my ($part_id,$hash2) = each (%$hash1)) {
! 1227: while (my ($resp_id,$hash3) = each (%$hash2)) {
! 1228: while (my ($transaction,$data) = each (%$hash3)) {
! 1229: $store_command .= "('".join("','",$symb_id,$part_id,
! 1230: $resp_id,$student_id,
! 1231: $transaction,
! 1232: $data->{'tries'},
! 1233: $data->{'awarddetail'},
! 1234: $data->{'awarded'},
! 1235: '','',
! 1236: $data->{'submission'})."'),";
! 1237: $store_rows++;
! 1238: }
! 1239: }
! 1240: }
! 1241: }
! 1242: if ($store_rows) {
! 1243: chop($store_command);
! 1244: $dbh->do($store_command);
! 1245: if ($dbh->err) {
! 1246: $returnstatus = 'error storing response data';
! 1247: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
! 1248: &Apache::lonnet::logthis("While attempting\n".$store_command);
! 1249: }
! 1250: }
! 1251: ##
! 1252: ## Update the students "current" data in the performance
! 1253: ## and parameters tables.
! 1254: my ($status,undef) = &store_student_data
! 1255: ($sname,$sdom,$courseid,
! 1256: &Apache::lonnet::convert_dump_to_currentdump(\%studentdata));
! 1257: if ($returnstatus eq 'okay' && $status ne 'okay') {
! 1258: $returnstatus = 'error storing current data:'.$status;
! 1259: } elsif ($status ne 'okay') {
! 1260: $returnstatus .= ' error storing current data:'.$status;
! 1261: }
! 1262: ##
! 1263: ## Update the students time......
! 1264: if ($returnstatus eq 'okay') {
! 1265: &Apache::lonmysql::replace_row
! 1266: ($studentdata_table,
! 1267: [$student_id,$time_of_retrieval,$time_of_retrieval,undef,undef]);
! 1268: }
! 1269: return $returnstatus;
! 1270: }
! 1271:
! 1272: ################################################
! 1273: ################################################
! 1274:
! 1275: =pod
! 1276:
1.57 matthew 1277: =item &update_student_data()
1278:
1279: Input: $sname, $sdom, $courseid
1280:
1281: Output: $returnstatus, \%student_data
1282:
1283: $returnstatus is a string describing any errors that occured. 'okay' is the
1284: default.
1285: \%student_data is the data returned by a call to lonnet::currentdump.
1286:
1287: This subroutine loads a students data using lonnet::currentdump and inserts
1288: it into the MySQL database. The inserts are done on two tables,
1289: $performance_table and $parameters_table. $parameters_table holds the data
1290: that is not included in $performance_table. See the description of
1291: $performance_table elsewhere in this file. The INSERT calls are made
1292: directly by this subroutine, not through lonmysql because we do a 'bulk'
1293: insert which takes advantage of MySQLs non-SQL compliant INSERT command to
1294: insert multiple rows at a time. If anything has gone wrong during this
1295: process, $returnstatus is updated with a description of the error and
1296: \%student_data is returned.
1297:
1298: Notice we do not insert the data and immediately query it. This means it
1299: is possible for there to be data returned this first time that is not
1300: available the second time. CYA.
1301:
1302: =cut
1303:
1304: ################################################
1305: ################################################
1306: sub update_student_data {
1307: my ($sname,$sdom,$courseid) = @_;
1308: #
1.60 matthew 1309: # Set up database names
1310: &setup_table_names($courseid);
1311: #
1.57 matthew 1312: my $student_id = &get_student_id($sname,$sdom);
1313: my $student = $sname.':'.$sdom;
1314: #
1315: my $returnstatus = 'okay';
1316: #
1317: # Download students data
1318: my $time_of_retrieval = time;
1319: my @tmp = &Apache::lonnet::currentdump($courseid,$sdom,$sname);
1320: if ((scalar(@tmp) > 0) && ($tmp[0] =~ /^error:/)) {
1321: &Apache::lonnet::logthis('error getting data for '.
1322: $sname.':'.$sdom.' in course '.$courseid.
1323: ':'.$tmp[0]);
1324: $returnstatus = 'error getting data';
1.79 matthew 1325: return ($returnstatus,undef);
1.57 matthew 1326: }
1327: if (scalar(@tmp) < 1) {
1328: return ('no data',undef);
1329: }
1330: my %student_data = @tmp;
1.89 ! matthew 1331: my @Results = &store_student_data($sname,$sdom,$courseid,\%student_data);
! 1332: #
! 1333: # Set the students update time
! 1334: &Apache::lonmysql::replace_row($studentdata_table,
! 1335: [$student_id,$time_of_retrieval,undef,undef,undef]);
! 1336: #
! 1337: return @Results;
! 1338: }
! 1339:
! 1340: sub store_student_data {
! 1341: my ($sname,$sdom,$courseid,$student_data) = @_;
! 1342: #
! 1343: my $student_id = &get_student_id($sname,$sdom);
! 1344: my $student = $sname.':'.$sdom;
! 1345: #
! 1346: my $returnstatus = 'okay';
1.57 matthew 1347: #
1348: # Remove all of the students data from the table
1.60 matthew 1349: my $dbh = &Apache::lonmysql::get_dbh();
1350: $dbh->do('DELETE FROM '.$performance_table.' WHERE student_id='.
1351: $student_id);
1352: $dbh->do('DELETE FROM '.$parameters_table.' WHERE student_id='.
1353: $student_id);
1.57 matthew 1354: #
1355: # Store away the data
1356: #
1357: my $starttime = Time::HiRes::time;
1358: my $elapsed = 0;
1359: my $rows_stored;
1360: my $store_parameters_command = 'INSERT INTO '.$parameters_table.
1.60 matthew 1361: ' VALUES '."\n";
1.61 matthew 1362: my $num_parameters = 0;
1.57 matthew 1363: my $store_performance_command = 'INSERT INTO '.$performance_table.
1.60 matthew 1364: ' VALUES '."\n";
1.79 matthew 1365: return ('error',undef) if (! defined($dbh));
1.89 ! matthew 1366: while (my ($current_symb,$param_hash) = each(%{$student_data})) {
1.57 matthew 1367: #
1368: # make sure the symb is set up properly
1369: my $symb_id = &get_symb_id($current_symb);
1370: #
1371: # Load data into the tables
1.63 matthew 1372: while (my ($parameter,$value) = each(%$param_hash)) {
1.57 matthew 1373: my $newstring;
1.63 matthew 1374: if ($parameter !~ /(timestamp|resource\.(.*)\.(solved|tries|awarded|award|awarddetail|previous))/) {
1.57 matthew 1375: $newstring = "('".join("','",
1376: $symb_id,$student_id,
1.69 matthew 1377: $parameter)."',".
1378: $dbh->quote($value)."),\n";
1.61 matthew 1379: $num_parameters ++;
1.57 matthew 1380: if ($newstring !~ /''/) {
1381: $store_parameters_command .= $newstring;
1382: $rows_stored++;
1383: }
1384: }
1385: next if ($parameter !~ /^resource\.(.*)\.solved$/);
1386: #
1387: my $part = $1;
1388: my $part_id = &get_part_id($part);
1389: next if (!defined($part_id));
1390: my $solved = $value;
1391: my $tries = $param_hash->{'resource.'.$part.'.tries'};
1392: my $awarded = $param_hash->{'resource.'.$part.'.awarded'};
1393: my $award = $param_hash->{'resource.'.$part.'.award'};
1394: my $awarddetail = $param_hash->{'resource.'.$part.'.awarddetail'};
1395: my $timestamp = $param_hash->{'timestamp'};
1.60 matthew 1396: #
1.74 matthew 1397: $solved = '' if (! defined($solved));
1.57 matthew 1398: $tries = '' if (! defined($tries));
1399: $awarded = '' if (! defined($awarded));
1400: $award = '' if (! defined($award));
1401: $awarddetail = '' if (! defined($awarddetail));
1.73 matthew 1402: $newstring = "('".join("','",$symb_id,$student_id,$part_id,$part,
1.57 matthew 1403: $solved,$tries,$awarded,$award,
1.63 matthew 1404: $awarddetail,$timestamp)."'),\n";
1.57 matthew 1405: $store_performance_command .= $newstring;
1406: $rows_stored++;
1407: }
1408: }
1409: chop $store_parameters_command;
1.60 matthew 1410: chop $store_parameters_command;
1411: chop $store_performance_command;
1.57 matthew 1412: chop $store_performance_command;
1413: my $start = Time::HiRes::time;
1.61 matthew 1414: $dbh->do($store_parameters_command) if ($num_parameters>0);
1.57 matthew 1415: if ($dbh->err()) {
1416: &Apache::lonnet::logthis(' bigass insert error:'.$dbh->errstr());
1.61 matthew 1417: &Apache::lonnet::logthis('command = '.$store_parameters_command);
1.87 matthew 1418: &Apache::lonnet::logthis('rows_stored = '.$rows_stored);
1419: &Apache::lonnet::logthis('student_id = '.$student_id);
1.57 matthew 1420: $returnstatus = 'error: unable to insert parameters into database';
1.89 ! matthew 1421: return ($returnstatus,$student_data);
1.57 matthew 1422: }
1423: $dbh->do($store_performance_command);
1424: if ($dbh->err()) {
1425: &Apache::lonnet::logthis(' bigass insert error:'.$dbh->errstr());
1.61 matthew 1426: &Apache::lonnet::logthis('command = '.$store_performance_command);
1.57 matthew 1427: $returnstatus = 'error: unable to insert performance into database';
1.89 ! matthew 1428: return ($returnstatus,$student_data);
1.57 matthew 1429: }
1430: $elapsed += Time::HiRes::time - $start;
1.89 ! matthew 1431: return ($returnstatus,$student_data);
1.57 matthew 1432: }
1433:
1.89 ! matthew 1434: ######################################
! 1435: ######################################
1.57 matthew 1436:
1437: =pod
1438:
1.89 ! matthew 1439: =item &ensure_tables_are_set_up($courseid)
1.57 matthew 1440:
1.89 ! matthew 1441: Checks to be sure the MySQL tables for the given class are set up.
! 1442: If $courseid is omitted it will be obtained from the environment.
1.57 matthew 1443:
1.89 ! matthew 1444: Returns nothing on success and 'error' on failure
1.57 matthew 1445:
1446: =cut
1447:
1.89 ! matthew 1448: ######################################
! 1449: ######################################
! 1450: sub ensure_tables_are_set_up {
! 1451: my ($courseid) = @_;
1.61 matthew 1452: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1453: #
1454: # Clean out package variables
1.57 matthew 1455: &setup_table_names($courseid);
1456: #
1457: # if the tables do not exist, make them
1458: my @CurrentTable = &Apache::lonmysql::tables_in_db();
1.87 matthew 1459: my ($found_symb,$found_student,$found_part,$found_studentdata,
1.89 ! matthew 1460: $found_performance,$found_parameters,$found_fulldump_part,
! 1461: $found_fulldump_response,$found_fulldump_timestamp);
1.57 matthew 1462: foreach (@CurrentTable) {
1463: $found_symb = 1 if ($_ eq $symb_table);
1464: $found_student = 1 if ($_ eq $student_table);
1465: $found_part = 1 if ($_ eq $part_table);
1.87 matthew 1466: $found_studentdata = 1 if ($_ eq $studentdata_table);
1.57 matthew 1467: $found_performance = 1 if ($_ eq $performance_table);
1468: $found_parameters = 1 if ($_ eq $parameters_table);
1.89 ! matthew 1469: $found_fulldump_part = 1 if ($_ eq $fulldump_part_table);
! 1470: $found_fulldump_response = 1 if ($_ eq $fulldump_response_table);
! 1471: $found_fulldump_timestamp = 1 if ($_ eq $fulldump_timestamp_table);
1.57 matthew 1472: }
1.87 matthew 1473: if (!$found_symb || !$found_studentdata ||
1.57 matthew 1474: !$found_student || !$found_part ||
1.89 ! matthew 1475: !$found_performance || !$found_parameters ||
! 1476: !$found_fulldump_part || !$found_fulldump_response ||
! 1477: !$found_fulldump_timestamp ) {
1.57 matthew 1478: if (&init_dbs($courseid)) {
1.89 ! matthew 1479: return 'error';
1.57 matthew 1480: }
1481: }
1.89 ! matthew 1482: }
! 1483:
! 1484: ################################################
! 1485: ################################################
! 1486:
! 1487: =pod
! 1488:
! 1489: =item &ensure_current_data()
! 1490:
! 1491: Input: $sname, $sdom, $courseid
! 1492:
! 1493: Output: $status, $data
! 1494:
! 1495: This routine ensures the data for a given student is up to date.
! 1496: The $studentdata_table is queried to determine the time of the last update.
! 1497: If the students data is out of date, &update_student_data() is called.
! 1498: The return values from the call to &update_student_data() are returned.
! 1499:
! 1500: =cut
! 1501:
! 1502: ################################################
! 1503: ################################################
! 1504: sub ensure_current_data {
! 1505: my ($sname,$sdom,$courseid) = @_;
! 1506: my $status = 'okay'; # return value
! 1507: #
! 1508: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
! 1509: &ensure_tables_are_set_up($courseid);
1.57 matthew 1510: #
1511: # Get the update time for the user
1512: my $updatetime = 0;
1.60 matthew 1513: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1514: ($sdom,$sname,$courseid.'.db',
1515: $Apache::lonnet::perlvar{'lonUsersDir'});
1.57 matthew 1516: #
1.87 matthew 1517: my $student_id = &get_student_id($sname,$sdom);
1518: my @Result = &Apache::lonmysql::get_rows($studentdata_table,
1519: "student_id ='$student_id'");
1.57 matthew 1520: my $data = undef;
1521: if (@Result) {
1522: $updatetime = $Result[0]->[1];
1523: }
1524: if ($modifiedtime > $updatetime) {
1525: ($status,$data) = &update_student_data($sname,$sdom,$courseid);
1526: }
1527: return ($status,$data);
1528: }
1529:
1530: ################################################
1531: ################################################
1532:
1533: =pod
1534:
1.89 ! matthew 1535: =item &ensure_current_full_data($sname,$sdom,$courseid)
! 1536:
! 1537: Input: $sname, $sdom, $courseid
! 1538:
! 1539: Output: $status
! 1540:
! 1541: This routine ensures the fulldata (the data from a lonnet::dump, not a
! 1542: lonnet::currentdump) for a given student is up to date.
! 1543: The $studentdata_table is queried to determine the time of the last update.
! 1544: If the students fulldata is out of date, &update_full_student_data() is
! 1545: called.
! 1546:
! 1547: The return value from the call to &update_full_student_data() is returned.
! 1548:
! 1549: =cut
! 1550:
! 1551: ################################################
! 1552: ################################################
! 1553: sub ensure_current_full_data {
! 1554: my ($sname,$sdom,$courseid) = @_;
! 1555: my $status = 'okay'; # return value
! 1556: #
! 1557: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
! 1558: &ensure_tables_are_set_up($courseid);
! 1559: #
! 1560: # Get the update time for the user
! 1561: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
! 1562: ($sdom,$sname,$courseid.'.db',
! 1563: $Apache::lonnet::perlvar{'lonUsersDir'});
! 1564: #
! 1565: my $student_id = &get_student_id($sname,$sdom);
! 1566: my @Result = &Apache::lonmysql::get_rows($studentdata_table,
! 1567: "student_id ='$student_id'");
! 1568: my $updatetime;
! 1569: if (@Result && ref($Result[0]) eq 'ARRAY') {
! 1570: $updatetime = $Result[0]->[2];
! 1571: }
! 1572: if (! defined($updatetime) || $modifiedtime > $updatetime) {
! 1573: $status = &update_full_student_data($sname,$sdom,$courseid);
! 1574: }
! 1575: return $status;
! 1576: }
! 1577:
! 1578: ################################################
! 1579: ################################################
! 1580:
! 1581: =pod
! 1582:
1.57 matthew 1583: =item &get_student_data_from_performance_cache()
1584:
1585: Input: $sname, $sdom, $symb, $courseid
1586:
1587: Output: hash reference containing the data for the given student.
1588: If $symb is undef, all the students data is returned.
1589:
1590: This routine is the heart of the local caching system. See the description
1591: of $performance_table, $symb_table, $student_table, and $part_table. The
1592: main task is building the MySQL request. The tables appear in the request
1593: in the order in which they should be parsed by MySQL. When searching
1594: on a student the $student_table is used to locate the 'student_id'. All
1595: rows in $performance_table which have a matching 'student_id' are returned,
1596: with data from $part_table and $symb_table which match the entries in
1597: $performance_table, 'part_id' and 'symb_id'. When searching on a symb,
1598: the $symb_table is processed first, with matching rows grabbed from
1599: $performance_table and filled in from $part_table and $student_table in
1600: that order.
1601:
1602: Running 'EXPLAIN ' on the 'SELECT' statements generated can be quite
1603: interesting, especially if you play with the order the tables are listed.
1604:
1605: =cut
1606:
1607: ################################################
1608: ################################################
1609: sub get_student_data_from_performance_cache {
1610: my ($sname,$sdom,$symb,$courseid)=@_;
1611: my $student = $sname.':'.$sdom if (defined($sname) && defined($sdom));
1.61 matthew 1612: &setup_table_names($courseid);
1.57 matthew 1613: #
1614: # Return hash
1615: my $studentdata;
1616: #
1617: my $dbh = &Apache::lonmysql::get_dbh();
1618: my $request = "SELECT ".
1.73 matthew 1619: "d.symb,a.part,a.solved,a.tries,a.awarded,a.award,a.awarddetail,".
1.63 matthew 1620: "a.timestamp ";
1.57 matthew 1621: if (defined($student)) {
1622: $request .= "FROM $student_table AS b ".
1623: "LEFT JOIN $performance_table AS a ON b.student_id=a.student_id ".
1.73 matthew 1624: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1.57 matthew 1625: "LEFT JOIN $symb_table AS d ON d.symb_id = a.symb_id ".
1626: "WHERE student='$student'";
1627: if (defined($symb) && $symb ne '') {
1.67 matthew 1628: $request .= " AND d.symb=".$dbh->quote($symb);
1.57 matthew 1629: }
1630: } elsif (defined($symb) && $symb ne '') {
1631: $request .= "FROM $symb_table as d ".
1632: "LEFT JOIN $performance_table AS a ON d.symb_id=a.symb_id ".
1.73 matthew 1633: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1.57 matthew 1634: "LEFT JOIN $student_table AS b ON b.student_id = a.student_id ".
1635: "WHERE symb='".$dbh->quote($symb)."'";
1636: }
1637: my $starttime = Time::HiRes::time;
1638: my $rows_retrieved = 0;
1639: my $sth = $dbh->prepare($request);
1640: $sth->execute();
1641: if ($sth->err()) {
1642: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1643: &Apache::lonnet::logthis("\n".$request."\n");
1644: &Apache::lonnet::logthis("error is:".$sth->errstr());
1645: return undef;
1646: }
1647: foreach my $row (@{$sth->fetchall_arrayref}) {
1648: $rows_retrieved++;
1.63 matthew 1649: my ($symb,$part,$solved,$tries,$awarded,$award,$awarddetail,$time) =
1.57 matthew 1650: (@$row);
1651: my $base = 'resource.'.$part;
1652: $studentdata->{$symb}->{$base.'.solved'} = $solved;
1653: $studentdata->{$symb}->{$base.'.tries'} = $tries;
1654: $studentdata->{$symb}->{$base.'.awarded'} = $awarded;
1655: $studentdata->{$symb}->{$base.'.award'} = $award;
1656: $studentdata->{$symb}->{$base.'.awarddetail'} = $awarddetail;
1657: $studentdata->{$symb}->{'timestamp'} = $time if (defined($time) && $time ne '');
1.67 matthew 1658: }
1659: if (defined($symb) && $symb ne '') {
1660: $studentdata = $studentdata->{$symb};
1.57 matthew 1661: }
1662: return $studentdata;
1663: }
1664:
1665: ################################################
1666: ################################################
1667:
1668: =pod
1669:
1670: =item &get_current_state()
1671:
1672: Input: $sname,$sdom,$symb,$courseid
1673:
1674: Output: Described below
1.46 matthew 1675:
1.47 matthew 1676: Retrieve the current status of a students performance. $sname and
1.46 matthew 1677: $sdom are the only required parameters. If $symb is undef the results
1.47 matthew 1678: of an &Apache::lonnet::currentdump() will be returned.
1.46 matthew 1679: If $courseid is undef it will be retrieved from the environment.
1680:
1681: The return structure is based on &Apache::lonnet::currentdump. If
1682: $symb is unspecified, all the students data is returned in a hash of
1683: the form:
1684: (
1685: symb1 => { param1 => value1, param2 => value2 ... },
1686: symb2 => { param1 => value1, param2 => value2 ... },
1687: )
1688:
1689: If $symb is specified, a hash of
1690: (
1691: param1 => value1,
1692: param2 => value2,
1693: )
1694: is returned.
1695:
1.57 matthew 1696: If no data is found for $symb, or if the student has no performance data,
1.46 matthew 1697: an empty list is returned.
1698:
1699: =cut
1700:
1701: ################################################
1702: ################################################
1703: sub get_current_state {
1.47 matthew 1704: my ($sname,$sdom,$symb,$courseid,$forcedownload)=@_;
1705: #
1.46 matthew 1706: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1.47 matthew 1707: #
1.61 matthew 1708: return () if (! defined($sname) || ! defined($sdom));
1709: #
1.57 matthew 1710: my ($status,$data) = &ensure_current_data($sname,$sdom,$courseid);
1.77 matthew 1711: # &Apache::lonnet::logthis
1712: # ('sname = '.$sname.
1713: # ' domain = '.$sdom.
1714: # ' status = '.$status.
1715: # ' data is '.(defined($data)?'defined':'undefined'));
1.73 matthew 1716: # while (my ($symb,$hash) = each(%$data)) {
1717: # &Apache::lonnet::logthis($symb."\n----------------------------------");
1718: # while (my ($key,$value) = each (%$hash)) {
1719: # &Apache::lonnet::logthis(" ".$key." = ".$value);
1720: # }
1721: # }
1.47 matthew 1722: #
1.79 matthew 1723: if (defined($data) && defined($symb) && ref($data->{$symb})) {
1724: return %{$data->{$symb}};
1725: } elsif (defined($data) && ! defined($symb) && ref($data)) {
1726: return %$data;
1727: }
1728: if ($status eq 'no data') {
1.57 matthew 1729: return ();
1730: } else {
1731: if ($status ne 'okay' && $status ne '') {
1732: &Apache::lonnet::logthis('status = '.$status);
1.47 matthew 1733: return ();
1734: }
1.57 matthew 1735: my $returnhash = &get_student_data_from_performance_cache($sname,$sdom,
1736: $symb,$courseid);
1737: return %$returnhash if (defined($returnhash));
1.46 matthew 1738: }
1.57 matthew 1739: return ();
1.61 matthew 1740: }
1741:
1742: ################################################
1743: ################################################
1744:
1745: =pod
1746:
1747: =item &get_problem_statistics()
1748:
1749: Gather data on a given problem. The database is assumed to be
1750: populated and all local caching variables are assumed to be set
1751: properly. This means you need to call &ensure_current_data for
1752: the students you are concerned with prior to calling this routine.
1753:
1754: Inputs: $students, $symb, $part, $courseid
1755:
1.64 matthew 1756: =over 4
1757:
1758: =item $students is an array of hash references.
1759: Each hash must contain at least the 'username' and 'domain' of a student.
1760:
1761: =item $symb is the symb for the problem.
1762:
1763: =item $part is the part id you need statistics for
1764:
1765: =item $courseid is the course id, of course!
1766:
1767: =back
1768:
1.66 matthew 1769: Outputs: See the code for up to date information. A hash reference is
1770: returned. The hash has the following keys defined:
1.64 matthew 1771:
1772: =over 4
1773:
1.66 matthew 1774: =item num_students The number of students attempting the problem
1775:
1776: =item tries The total number of tries for the students
1777:
1778: =item max_tries The maximum number of tries taken
1779:
1780: =item mean_tries The average number of tries
1781:
1782: =item num_solved The number of students able to solve the problem
1783:
1784: =item num_override The number of students whose answer is 'correct_by_override'
1785:
1786: =item deg_of_diff The degree of difficulty of the problem
1787:
1788: =item std_tries The standard deviation of the number of tries
1789:
1790: =item skew_tries The skew of the number of tries
1.64 matthew 1791:
1.66 matthew 1792: =item per_wrong The number of students attempting the problem who were not
1793: able to answer it correctly.
1.64 matthew 1794:
1795: =back
1796:
1.61 matthew 1797: =cut
1798:
1799: ################################################
1800: ################################################
1801: sub get_problem_statistics {
1802: my ($students,$symb,$part,$courseid) = @_;
1803: return if (! defined($symb) || ! defined($part));
1804: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1805: #
1806: my $symb_id = &get_symb_id($symb);
1807: my $part_id = &get_part_id($part);
1808: my $stats_table = $courseid.'_problem_stats';
1809: #
1810: my $dbh = &Apache::lonmysql::get_dbh();
1811: return undef if (! defined($dbh));
1812: #
1813: # A) Number of Students attempting problem
1814: # B) Total number of tries of students attempting problem
1815: # C) Mod (largest number of tries for solving the problem)
1816: # D) Mean (average number of tries for solving the problem)
1817: # E) Number of students to solve the problem
1818: # F) Number of students to solve the problem by override
1819: # G) Number of students unable to solve the problem
1820: # H) Degree of difficulty : 1-(E+F)/B
1821: # I) Standard deviation of number of tries
1822: # J) Skew of tries: sqrt(sum(Xi-D)^3)/A
1823: #
1824: $dbh->do('DROP TABLE '.$stats_table); # May return an error
1825: my $request =
1826: 'CREATE TEMPORARY TABLE '.$stats_table.
1827: ' SELECT student_id,solved,award,tries FROM '.$performance_table.
1828: ' WHERE symb_id='.$symb_id.' AND part_id='.$part_id;
1.64 matthew 1829: if (defined($students)) {
1830: $request .= ' AND ('.
1831: join(' OR ', map {'student_id='.
1832: &get_student_id($_->{'username'},
1833: $_->{'domain'})
1834: } @$students
1835: ).')';
1836: }
1.61 matthew 1837: # &Apache::lonnet::logthis($request);
1838: $dbh->do($request);
1839: my ($num,$tries,$mod,$mean,$STD) = &execute_SQL_request
1840: ($dbh,
1841: 'SELECT COUNT(*),SUM(tries),MAX(tries),AVG(tries),STD(tries) FROM '.
1842: $stats_table);
1843: my ($Solved) = &execute_SQL_request($dbh,'SELECT COUNT(tries) FROM '.
1844: $stats_table.
1845: " WHERE solved='correct_by_student'");
1846: my ($solved) = &execute_SQL_request($dbh,'SELECT COUNT(tries) FROM '.
1847: $stats_table.
1848: " WHERE solved='correct_by_override'");
1849: $num = 0 if (! defined($num));
1850: $tries = 0 if (! defined($tries));
1851: $mod = 0 if (! defined($mod));
1852: $STD = 0 if (! defined($STD));
1853: $Solved = 0 if (! defined($Solved));
1854: $solved = 0 if (! defined($solved));
1855: #
1856: my $DegOfDiff = 'nan';
1.66 matthew 1857: $DegOfDiff = 1-($Solved)/$tries if ($tries>0);
1.61 matthew 1858:
1859: my $SKEW = 'nan';
1.66 matthew 1860: my $wrongpercent = 0;
1.61 matthew 1861: if ($num > 0) {
1862: ($SKEW) = &execute_SQL_request($dbh,'SELECT SQRT(SUM('.
1863: 'POWER(tries - '.$STD.',3)'.
1864: '))/'.$num.' FROM '.$stats_table);
1.66 matthew 1865: $wrongpercent=int(10*100*($num-$Solved+$solved)/$num)/10;
1.61 matthew 1866: }
1867: #
1868: $dbh->do('DROP TABLE '.$stats_table); # May return an error
1.81 matthew 1869: #
1870: # Store in metadata
1871: #
1.80 www 1872: if ($num) {
1873: my %storestats=();
1874:
1.86 www 1875: my $urlres=(&Apache::lonnet::decode_symb($symb))[2];
1.80 www 1876:
1877: $storestats{$courseid.'___'.$urlres.'___timestamp'}=time;
1878: $storestats{$courseid.'___'.$urlres.'___stdno'}=$num;
1879: $storestats{$courseid.'___'.$urlres.'___avetries'}=$mean;
1880: $storestats{$courseid.'___'.$urlres.'___difficulty'}=$DegOfDiff;
1881:
1882: $urlres=~/^(\w+)\/(\w+)/;
1883: &Apache::lonnet::put('nohist_resevaldata',\%storestats,$1,$2);
1884: }
1.81 matthew 1885: #
1886: # Return result
1887: #
1.66 matthew 1888: return { num_students => $num,
1889: tries => $tries,
1890: max_tries => $mod,
1891: mean_tries => $mean,
1892: std_tries => $STD,
1893: skew_tries => $SKEW,
1894: num_solved => $Solved,
1895: num_override => $solved,
1896: per_wrong => $wrongpercent,
1.81 matthew 1897: deg_of_diff => $DegOfDiff };
1.61 matthew 1898: }
1899:
1900: sub execute_SQL_request {
1901: my ($dbh,$request)=@_;
1902: # &Apache::lonnet::logthis($request);
1903: my $sth = $dbh->prepare($request);
1904: $sth->execute();
1905: my $row = $sth->fetchrow_arrayref();
1906: if (ref($row) eq 'ARRAY' && scalar(@$row)>0) {
1907: return @$row;
1908: }
1909: return ();
1910: }
1911:
1912:
1913: ################################################
1914: ################################################
1915:
1916: =pod
1917:
1918: =item &setup_table_names()
1919:
1920: input: course id
1921:
1922: output: none
1923:
1924: Cleans up the package variables for local caching.
1925:
1926: =cut
1927:
1928: ################################################
1929: ################################################
1930: sub setup_table_names {
1931: my ($courseid) = @_;
1932: if (! defined($courseid)) {
1933: $courseid = $ENV{'request.course.id'};
1934: }
1935: #
1936: if (! defined($current_course) || $current_course ne $courseid) {
1937: # Clear out variables
1938: $have_read_part_table = 0;
1939: undef(%ids_by_part);
1940: undef(%parts_by_id);
1941: $have_read_symb_table = 0;
1942: undef(%ids_by_symb);
1943: undef(%symbs_by_id);
1944: $have_read_student_table = 0;
1945: undef(%ids_by_student);
1946: undef(%students_by_id);
1947: #
1948: $current_course = $courseid;
1949: }
1950: #
1951: # Set up database names
1952: my $base_id = $courseid;
1953: $symb_table = $base_id.'_'.'symb';
1954: $part_table = $base_id.'_'.'part';
1955: $student_table = $base_id.'_'.'student';
1.87 matthew 1956: $studentdata_table = $base_id.'_'.'studentdata';
1.61 matthew 1957: $performance_table = $base_id.'_'.'performance';
1958: $parameters_table = $base_id.'_'.'parameters';
1.89 ! matthew 1959: $fulldump_part_table = $base_id.'_'.'partdata';
! 1960: $fulldump_response_table = $base_id.'_'.'responsedata';
! 1961: $fulldump_timestamp_table = $base_id.'_'.'timestampdata';
! 1962: #
! 1963: @Tables = (
! 1964: $symb_table,
! 1965: $part_table,
! 1966: $student_table,
! 1967: $studentdata_table,
! 1968: $performance_table,
! 1969: $parameters_table,
! 1970: $fulldump_part_table,
! 1971: $fulldump_response_table,
! 1972: $fulldump_timestamp_table,
! 1973: );
1.61 matthew 1974: return;
1.3 stredwic 1975: }
1.1 stredwic 1976:
1.35 matthew 1977: ################################################
1978: ################################################
1979:
1980: =pod
1981:
1.57 matthew 1982: =back
1983:
1984: =item End of Local Data Caching Subroutines
1985:
1986: =cut
1987:
1988: ################################################
1989: ################################################
1990:
1.89 ! matthew 1991: } # End scope of table identifiers
1.57 matthew 1992:
1993: ################################################
1994: ################################################
1995:
1996: =pod
1997:
1998: =head3 Classlist Subroutines
1999:
1.35 matthew 2000: =item &get_classlist();
2001:
2002: Retrieve the classist of a given class or of the current class. Student
2003: information is returned from the classlist.db file and, if needed,
2004: from the students environment.
2005:
2006: Optional arguments are $cid, $cdom, and $cnum (course id, course domain,
2007: and course number, respectively). Any omitted arguments will be taken
2008: from the current environment ($ENV{'request.course.id'},
2009: $ENV{'course.'.$cid.'.domain'}, and $ENV{'course.'.$cid.'.num'}).
2010:
2011: Returns a reference to a hash which contains:
2012: keys '$sname:$sdom'
1.54 bowersj2 2013: values [$sdom,$sname,$end,$start,$id,$section,$fullname,$status]
2014:
2015: The constant values CL_SDOM, CL_SNAME, CL_END, etc. can be used
2016: as indices into the returned list to future-proof clients against
2017: changes in the list order.
1.35 matthew 2018:
2019: =cut
2020:
2021: ################################################
2022: ################################################
1.54 bowersj2 2023:
2024: sub CL_SDOM { return 0; }
2025: sub CL_SNAME { return 1; }
2026: sub CL_END { return 2; }
2027: sub CL_START { return 3; }
2028: sub CL_ID { return 4; }
2029: sub CL_SECTION { return 5; }
2030: sub CL_FULLNAME { return 6; }
2031: sub CL_STATUS { return 7; }
1.35 matthew 2032:
2033: sub get_classlist {
2034: my ($cid,$cdom,$cnum) = @_;
2035: $cid = $cid || $ENV{'request.course.id'};
2036: $cdom = $cdom || $ENV{'course.'.$cid.'.domain'};
2037: $cnum = $cnum || $ENV{'course.'.$cid.'.num'};
1.57 matthew 2038: my $now = time;
1.35 matthew 2039: #
2040: my %classlist=&Apache::lonnet::dump('classlist',$cdom,$cnum);
2041: while (my ($student,$info) = each(%classlist)) {
1.60 matthew 2042: if ($student =~ /^(con_lost|error|no_such_host)/i) {
2043: &Apache::lonnet::logthis('get_classlist error for '.$cid.':'.$student);
2044: return undef;
2045: }
1.35 matthew 2046: my ($sname,$sdom) = split(/:/,$student);
2047: my @Values = split(/:/,$info);
2048: my ($end,$start,$id,$section,$fullname);
2049: if (@Values > 2) {
2050: ($end,$start,$id,$section,$fullname) = @Values;
2051: } else { # We have to get the data ourselves
2052: ($end,$start) = @Values;
1.37 matthew 2053: $section = &Apache::lonnet::getsection($sdom,$sname,$cid);
1.35 matthew 2054: my %info=&Apache::lonnet::get('environment',
2055: ['firstname','middlename',
2056: 'lastname','generation','id'],
2057: $sdom, $sname);
2058: my ($tmp) = keys(%info);
2059: if ($tmp =~/^(con_lost|error|no_such_host)/i) {
2060: $fullname = 'not available';
2061: $id = 'not available';
1.38 matthew 2062: &Apache::lonnet::logthis('unable to retrieve environment '.
2063: 'for '.$sname.':'.$sdom);
1.35 matthew 2064: } else {
2065: $fullname = &ProcessFullName(@info{qw/lastname generation
2066: firstname middlename/});
2067: $id = $info{'id'};
2068: }
1.36 matthew 2069: # Update the classlist with this students information
2070: if ($fullname ne 'not available') {
2071: my $enrolldata = join(':',$end,$start,$id,$section,$fullname);
2072: my $reply=&Apache::lonnet::cput('classlist',
2073: {$student => $enrolldata},
2074: $cdom,$cnum);
2075: if ($reply !~ /^(ok|delayed)/) {
2076: &Apache::lonnet::logthis('Unable to update classlist for '.
2077: 'student '.$sname.':'.$sdom.
2078: ' error:'.$reply);
2079: }
2080: }
1.35 matthew 2081: }
2082: my $status='Expired';
2083: if(((!$end) || $now < $end) && ((!$start) || ($now > $start))) {
2084: $status='Active';
2085: }
2086: $classlist{$student} =
2087: [$sdom,$sname,$end,$start,$id,$section,$fullname,$status];
2088: }
2089: if (wantarray()) {
2090: return (\%classlist,['domain','username','end','start','id',
2091: 'section','fullname','status']);
2092: } else {
2093: return \%classlist;
2094: }
2095: }
2096:
1.1 stredwic 2097: # ----- END HELPER FUNCTIONS --------------------------------------------
2098:
2099: 1;
2100: __END__
1.36 matthew 2101:
1.35 matthew 2102:
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