Annotation of loncom/interface/loncoursedata.pm, revision 1.148
1.1 stredwic 1: # The LearningOnline Network with CAPA
2: #
1.148 ! matthew 3: # $Id: loncoursedata.pm,v 1.147 2005/04/19 00:44:31 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);
1.146 albertel 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:
1.4 stredwic 69: sub LoadDiscussion {
1.13 stredwic 70: my ($courseID)=@_;
1.5 minaeibi 71: my %Discuss=();
72: my %contrib=&Apache::lonnet::dump(
73: $courseID,
1.146 albertel 74: $env{'course.'.$courseID.'.domain'},
75: $env{'course.'.$courseID.'.num'});
1.5 minaeibi 76:
77: #my %contrib=&DownloadCourseInformation($name, $courseID, 0);
78:
1.4 stredwic 79: foreach my $temp(keys %contrib) {
80: if ($temp=~/^version/) {
81: my $ver=$contrib{$temp};
82: my ($dummy,$prb)=split(':',$temp);
83: for (my $idx=1; $idx<=$ver; $idx++ ) {
84: my $name=$contrib{"$idx:$prb:sendername"};
1.5 minaeibi 85: $Discuss{"$name:$prb"}=$idx;
1.4 stredwic 86: }
87: }
88: }
1.5 minaeibi 89:
90: return \%Discuss;
1.1 stredwic 91: }
92:
1.71 matthew 93: ################################################
94: ################################################
95:
96: =pod
97:
1.47 matthew 98: =item &make_into_hash($values);
99:
100: Returns a reference to a hash as described by $values. $values is
101: assumed to be the result of
1.57 matthew 102: join(':',map {&Apache::lonnet::escape($_)} %orighash);
1.47 matthew 103:
104: This is a helper function for get_current_state.
105:
106: =cut
107:
108: ################################################
109: ################################################
110: sub make_into_hash {
111: my $values = shift;
112: my %tmp = map { &Apache::lonnet::unescape($_); }
113: split(':',$values);
114: return \%tmp;
115: }
116:
117:
118: ################################################
119: ################################################
120:
121: =pod
122:
1.57 matthew 123: =head1 LOCAL DATA CACHING SUBROUTINES
124:
125: The local caching is done using MySQL. There is no fall-back implementation
126: if MySQL is not running.
127:
128: The programmers interface is to call &get_current_state() or some other
129: primary interface subroutine (described below). The internals of this
130: storage system are documented here.
131:
132: There are six tables used to store student performance data (the results of
133: a dumpcurrent). Each of these tables is created in MySQL with a name of
134: $courseid_*****, where ***** is 'symb', 'part', or whatever is appropriate
135: for the table. The tables and their purposes are described below.
136:
137: Some notes before we get started.
138:
139: Each table must have a PRIMARY KEY, which is a column or set of columns which
140: will serve to uniquely identify a row of data. NULL is not allowed!
141:
142: INDEXes work best on integer data.
143:
144: JOIN is used to combine data from many tables into one output.
145:
146: lonmysql.pm is used for some of the interface, specifically the table creation
147: calls. The inserts are done in bulk by directly calling the database handler.
148: The SELECT ... JOIN statement used to retrieve the data does not have an
149: interface in lonmysql.pm and I shudder at the thought of writing one.
150:
151: =head3 Table Descriptions
152:
153: =over 4
154:
1.89 matthew 155: =item Tables used to store meta information
156:
157: The following tables hold data required to keep track of the current status
158: of a students data in the tables or to look up the students data in the tables.
159:
160: =over 4
161:
1.57 matthew 162: =item $symb_table
163:
164: The symb_table has two columns. The first is a 'symb_id' and the second
165: is the text name for the 'symb' (limited to 64k). The 'symb_id' is generated
166: automatically by MySQL so inserts should be done on this table with an
167: empty first element. This table has its PRIMARY KEY on the 'symb_id'.
168:
169: =item $part_table
170:
171: The part_table has two columns. The first is a 'part_id' and the second
172: is the text name for the 'part' (limited to 100 characters). The 'part_id' is
173: generated automatically by MySQL so inserts should be done on this table with
174: an empty first element. This table has its PRIMARY KEY on the 'part' (100
175: characters) and a KEY on 'part_id'.
176:
177: =item $student_table
178:
1.113 matthew 179: The student_table has 7 columns. The first is a 'student_id' assigned by
180: MySQL. The second is 'student' which is username:domain. The third through
181: fifth are 'section', 'status' (enrollment status), and 'classification'
182: (to be used in the future). The sixth and seventh ('updatetime' and
183: 'fullupdatetime') contain the time of last update and full update of student
184: data. This table has its PRIMARY KEY on the 'student_id' column and is indexed
185: on 'student', 'section', and 'status'.
1.89 matthew 186:
187: =back
188:
189: =item Tables used to store current status data
190:
191: The following tables store data only about the students current status on
192: a problem, meaning only the data related to the last attempt on a problem.
193:
194: =over 4
1.57 matthew 195:
196: =item $performance_table
197:
198: The performance_table has 9 columns. The first three are 'symb_id',
199: 'student_id', and 'part_id'. These comprise the PRIMARY KEY for this table
200: and are directly related to the $symb_table, $student_table, and $part_table
201: described above. MySQL does better indexing on numeric items than text,
202: so we use these three "index tables". The remaining columns are
203: 'solved', 'tries', 'awarded', 'award', 'awarddetail', and 'timestamp'.
204: These are either the MySQL type TINYTEXT or various integers ('tries' and
205: 'timestamp'). This table has KEYs of 'student_id' and 'symb_id'.
206: For use of this table, see the functions described below.
207:
208: =item $parameters_table
209:
210: The parameters_table holds the data that does not fit neatly into the
211: performance_table. The parameters table has four columns: 'symb_id',
212: 'student_id', 'parameter', and 'value'. 'symb_id', 'student_id', and
213: 'parameter' comprise the PRIMARY KEY for this table. 'parameter' is
214: limited to 255 characters. 'value' is limited to 64k characters.
215:
216: =back
217:
1.89 matthew 218: =item Tables used for storing historic data
219:
220: The following tables are used to store almost all of the transactions a student
221: has made on a homework problem. See loncapa/docs/homework/datastorage for
222: specific information about each of the parameters stored.
223:
224: =over 4
225:
226: =item $fulldump_response_table
227:
228: The response table holds data (documented in loncapa/docs/homework/datastorage)
229: associated with a particular response id which is stored when a student
230: attempts a problem. The following are the columns of the table, in order:
231: 'symb_id','part_id','response_id','student_id','transaction','tries',
1.93 matthew 232: 'awarddetail', 'response_specific' (data particular to the response
1.89 matthew 233: type), 'response_specific_value', and 'submission (the text of the students
234: submission). The primary key is based on the first five columns listed above.
235:
236: =item $fulldump_part_table
237:
238: The part table holds data (documented in loncapa/docs/homework/datastorage)
239: associated with a particular part id which is stored when a student attempts
240: a problem. The following are the columns of the table, in order:
241: 'symb_id','part_id','student_id','transaction','tries','award','awarded',
242: and 'previous'. The primary key is based on the first five columns listed
243: above.
244:
245: =item $fulldump_timestamp_table
246:
247: The timestamp table holds the timestamps of the transactions which are
248: stored in $fulldump_response_table and $fulldump_part_table. This data is
249: about both the response and part data. Columns: 'symb_id','student_id',
250: 'transaction', and 'timestamp'.
251: The primary key is based on the first 3 columns.
252:
1.127 matthew 253: =item $weight_table
254:
255: The weight table holds the weight for the problems used in the class.
256: Whereas the weight of a problem can vary by section and student the data
257: here is applied to the class as a whole.
258: Columns: 'symb_id','part_id','response_id','weight'.
259:
1.89 matthew 260: =back
261:
262: =back
263:
1.57 matthew 264: =head3 Important Subroutines
265:
266: Here is a brief overview of the subroutines which are likely to be of
267: interest:
268:
269: =over 4
270:
271: =item &get_current_state(): programmers interface.
272:
273: =item &init_dbs(): table creation
274:
275: =item &update_student_data(): data storage calls
276:
277: =item &get_student_data_from_performance_cache(): data retrieval
278:
279: =back
280:
281: =head3 Main Documentation
282:
283: =over 4
284:
285: =cut
286:
287: ################################################
288: ################################################
289:
290: ################################################
291: ################################################
1.89 matthew 292: { # Begin scope of table identifiers
1.57 matthew 293:
294: my $current_course ='';
295: my $symb_table;
296: my $part_table;
297: my $student_table;
298: my $performance_table;
299: my $parameters_table;
1.89 matthew 300: my $fulldump_response_table;
301: my $fulldump_part_table;
302: my $fulldump_timestamp_table;
1.127 matthew 303: my $weight_table;
1.57 matthew 304:
1.89 matthew 305: my @Tables;
1.57 matthew 306: ################################################
307: ################################################
308:
309: =pod
310:
311: =item &init_dbs()
312:
313: Input: course id
314:
315: Output: 0 on success, positive integer on error
316:
317: This routine issues the calls to lonmysql to create the tables used to
318: store student data.
319:
320: =cut
321:
322: ################################################
323: ################################################
324: sub init_dbs {
1.134 matthew 325: my ($courseid,$drop) = @_;
1.57 matthew 326: &setup_table_names($courseid);
327: #
1.73 matthew 328: # Drop any of the existing tables
1.134 matthew 329: if ($drop) {
330: foreach my $table (@Tables) {
331: &Apache::lonmysql::drop_table($table);
332: }
1.73 matthew 333: }
334: #
1.57 matthew 335: # Note - changes to this table must be reflected in the code that
336: # stores the data (calls &Apache::lonmysql::store_row with this table
337: # id
338: my $symb_table_def = {
339: id => $symb_table,
340: permanent => 'no',
341: columns => [{ name => 'symb_id',
342: type => 'MEDIUMINT UNSIGNED',
343: restrictions => 'NOT NULL',
344: auto_inc => 'yes', },
345: { name => 'symb',
346: type => 'MEDIUMTEXT',
347: restrictions => 'NOT NULL'},
348: ],
349: 'PRIMARY KEY' => ['symb_id'],
350: };
351: #
352: my $part_table_def = {
353: id => $part_table,
354: permanent => 'no',
355: columns => [{ name => 'part_id',
356: type => 'MEDIUMINT UNSIGNED',
357: restrictions => 'NOT NULL',
358: auto_inc => 'yes', },
359: { name => 'part',
1.132 matthew 360: type => 'VARCHAR(100) BINARY',
1.57 matthew 361: restrictions => 'NOT NULL'},
362: ],
363: 'PRIMARY KEY' => ['part (100)'],
364: 'KEY' => [{ columns => ['part_id']},],
365: };
366: #
367: my $student_table_def = {
368: id => $student_table,
369: permanent => 'no',
370: columns => [{ name => 'student_id',
371: type => 'MEDIUMINT UNSIGNED',
372: restrictions => 'NOT NULL',
373: auto_inc => 'yes', },
374: { name => 'student',
1.132 matthew 375: type => 'VARCHAR(100) BINARY',
1.113 matthew 376: restrictions => 'NOT NULL UNIQUE'},
377: { name => 'section',
1.132 matthew 378: type => 'VARCHAR(100) BINARY',
1.113 matthew 379: restrictions => 'NOT NULL'},
380: { name => 'status',
1.132 matthew 381: type => 'VARCHAR(15) BINARY',
1.57 matthew 382: restrictions => 'NOT NULL'},
1.85 matthew 383: { name => 'classification',
1.132 matthew 384: type => 'VARCHAR(100) BINARY', },
1.57 matthew 385: { name => 'updatetime',
1.89 matthew 386: type => 'INT UNSIGNED'},
387: { name => 'fullupdatetime',
388: type => 'INT UNSIGNED'},
1.57 matthew 389: ],
1.87 matthew 390: 'PRIMARY KEY' => ['student_id'],
1.113 matthew 391: 'KEY' => [{ columns => ['student (100)',
392: 'section (100)',
393: 'status (15)',]},],
1.57 matthew 394: };
395: #
396: my $performance_table_def = {
397: id => $performance_table,
398: permanent => 'no',
399: columns => [{ name => 'symb_id',
400: type => 'MEDIUMINT UNSIGNED',
401: restrictions => 'NOT NULL' },
402: { name => 'student_id',
403: type => 'MEDIUMINT UNSIGNED',
404: restrictions => 'NOT NULL' },
405: { name => 'part_id',
406: type => 'MEDIUMINT UNSIGNED',
407: restrictions => 'NOT NULL' },
1.73 matthew 408: { name => 'part',
1.132 matthew 409: type => 'VARCHAR(100) BINARY',
1.73 matthew 410: restrictions => 'NOT NULL'},
1.57 matthew 411: { name => 'solved',
412: type => 'TINYTEXT' },
413: { name => 'tries',
414: type => 'SMALLINT UNSIGNED' },
415: { name => 'awarded',
1.127 matthew 416: type => 'REAL' },
1.57 matthew 417: { name => 'award',
418: type => 'TINYTEXT' },
419: { name => 'awarddetail',
420: type => 'TINYTEXT' },
421: { name => 'timestamp',
422: type => 'INT UNSIGNED'},
423: ],
424: 'PRIMARY KEY' => ['symb_id','student_id','part_id'],
425: 'KEY' => [{ columns=>['student_id'] },
426: { columns=>['symb_id'] },],
427: };
428: #
1.89 matthew 429: my $fulldump_part_table_def = {
430: id => $fulldump_part_table,
431: permanent => 'no',
432: columns => [
433: { name => 'symb_id',
434: type => 'MEDIUMINT UNSIGNED',
435: restrictions => 'NOT NULL' },
436: { name => 'part_id',
437: type => 'MEDIUMINT UNSIGNED',
438: restrictions => 'NOT NULL' },
439: { name => 'student_id',
440: type => 'MEDIUMINT UNSIGNED',
441: restrictions => 'NOT NULL' },
442: { name => 'transaction',
443: type => 'MEDIUMINT UNSIGNED',
444: restrictions => 'NOT NULL' },
445: { name => 'tries',
446: type => 'SMALLINT UNSIGNED',
447: restrictions => 'NOT NULL' },
448: { name => 'award',
449: type => 'TINYTEXT' },
450: { name => 'awarded',
1.127 matthew 451: type => 'REAL' },
1.89 matthew 452: { name => 'previous',
453: type => 'SMALLINT UNSIGNED' },
454: # { name => 'regrader',
455: # type => 'TINYTEXT' },
456: # { name => 'afterduedate',
457: # type => 'TINYTEXT' },
458: ],
459: 'PRIMARY KEY' => ['symb_id','part_id','student_id','transaction'],
460: 'KEY' => [
461: { columns=>['symb_id'] },
462: { columns=>['part_id'] },
463: { columns=>['student_id'] },
464: ],
465: };
466: #
467: my $fulldump_response_table_def = {
468: id => $fulldump_response_table,
469: permanent => 'no',
470: columns => [
471: { name => 'symb_id',
472: type => 'MEDIUMINT UNSIGNED',
473: restrictions => 'NOT NULL' },
474: { name => 'part_id',
475: type => 'MEDIUMINT UNSIGNED',
476: restrictions => 'NOT NULL' },
477: { name => 'response_id',
478: type => 'MEDIUMINT UNSIGNED',
479: restrictions => 'NOT NULL' },
480: { name => 'student_id',
481: type => 'MEDIUMINT UNSIGNED',
482: restrictions => 'NOT NULL' },
483: { name => 'transaction',
484: type => 'MEDIUMINT UNSIGNED',
485: restrictions => 'NOT NULL' },
486: { name => 'awarddetail',
487: type => 'TINYTEXT' },
488: # { name => 'message',
1.132 matthew 489: # type => 'CHAR BINARY'},
1.89 matthew 490: { name => 'response_specific',
491: type => 'TINYTEXT' },
492: { name => 'response_specific_value',
493: type => 'TINYTEXT' },
494: { name => 'submission',
495: type => 'TEXT'},
496: ],
497: 'PRIMARY KEY' => ['symb_id','part_id','response_id','student_id',
498: 'transaction'],
499: 'KEY' => [
500: { columns=>['symb_id'] },
501: { columns=>['part_id','response_id'] },
502: { columns=>['student_id'] },
503: ],
504: };
505: my $fulldump_timestamp_table_def = {
506: id => $fulldump_timestamp_table,
507: permanent => 'no',
508: columns => [
509: { name => 'symb_id',
510: type => 'MEDIUMINT UNSIGNED',
511: restrictions => 'NOT NULL' },
512: { name => 'student_id',
513: type => 'MEDIUMINT UNSIGNED',
514: restrictions => 'NOT NULL' },
515: { name => 'transaction',
516: type => 'MEDIUMINT UNSIGNED',
517: restrictions => 'NOT NULL' },
518: { name => 'timestamp',
519: type => 'INT UNSIGNED'},
520: ],
521: 'PRIMARY KEY' => ['symb_id','student_id','transaction'],
522: 'KEY' => [
523: { columns=>['symb_id'] },
524: { columns=>['student_id'] },
525: { columns=>['transaction'] },
526: ],
527: };
528: #
1.57 matthew 529: my $parameters_table_def = {
530: id => $parameters_table,
531: permanent => 'no',
532: columns => [{ name => 'symb_id',
533: type => 'MEDIUMINT UNSIGNED',
534: restrictions => 'NOT NULL' },
535: { name => 'student_id',
536: type => 'MEDIUMINT UNSIGNED',
537: restrictions => 'NOT NULL' },
538: { name => 'parameter',
539: type => 'TINYTEXT',
540: restrictions => 'NOT NULL' },
541: { name => 'value',
542: type => 'MEDIUMTEXT' },
543: ],
544: 'PRIMARY KEY' => ['symb_id','student_id','parameter (255)'],
545: };
546: #
1.127 matthew 547: my $weight_table_def = {
548: id => $weight_table,
549: permanent => 'no',
550: columns => [{ name => 'symb_id',
551: type => 'MEDIUMINT UNSIGNED',
552: restrictions => 'NOT NULL' },
553: { name => 'part_id',
554: type => 'MEDIUMINT UNSIGNED',
555: restrictions => 'NOT NULL' },
556: { name => 'weight',
557: type => 'REAL',
558: restrictions => 'NOT NULL' },
559: ],
560: 'PRIMARY KEY' => ['symb_id','part_id'],
561: };
562: #
1.57 matthew 563: # Create the tables
564: my $tableid;
565: $tableid = &Apache::lonmysql::create_table($symb_table_def);
566: if (! defined($tableid)) {
567: &Apache::lonnet::logthis("error creating symb_table: ".
568: &Apache::lonmysql::get_error());
569: return 1;
570: }
571: #
572: $tableid = &Apache::lonmysql::create_table($part_table_def);
573: if (! defined($tableid)) {
574: &Apache::lonnet::logthis("error creating part_table: ".
575: &Apache::lonmysql::get_error());
576: return 2;
577: }
578: #
579: $tableid = &Apache::lonmysql::create_table($student_table_def);
580: if (! defined($tableid)) {
581: &Apache::lonnet::logthis("error creating student_table: ".
582: &Apache::lonmysql::get_error());
583: return 3;
584: }
585: #
586: $tableid = &Apache::lonmysql::create_table($performance_table_def);
587: if (! defined($tableid)) {
588: &Apache::lonnet::logthis("error creating preformance_table: ".
589: &Apache::lonmysql::get_error());
590: return 5;
591: }
592: #
593: $tableid = &Apache::lonmysql::create_table($parameters_table_def);
594: if (! defined($tableid)) {
595: &Apache::lonnet::logthis("error creating parameters_table: ".
596: &Apache::lonmysql::get_error());
597: return 6;
598: }
1.89 matthew 599: #
600: $tableid = &Apache::lonmysql::create_table($fulldump_part_table_def);
601: if (! defined($tableid)) {
602: &Apache::lonnet::logthis("error creating fulldump_part_table: ".
603: &Apache::lonmysql::get_error());
604: return 7;
605: }
606: #
607: $tableid = &Apache::lonmysql::create_table($fulldump_response_table_def);
608: if (! defined($tableid)) {
609: &Apache::lonnet::logthis("error creating fulldump_response_table: ".
610: &Apache::lonmysql::get_error());
611: return 8;
612: }
613: $tableid = &Apache::lonmysql::create_table($fulldump_timestamp_table_def);
614: if (! defined($tableid)) {
615: &Apache::lonnet::logthis("error creating fulldump_timestamp_table: ".
616: &Apache::lonmysql::get_error());
617: return 9;
618: }
1.127 matthew 619: $tableid = &Apache::lonmysql::create_table($weight_table_def);
620: if (! defined($tableid)) {
621: &Apache::lonnet::logthis("error creating weight_table: ".
622: &Apache::lonmysql::get_error());
623: return 10;
624: }
1.57 matthew 625: return 0;
1.70 matthew 626: }
627:
628: ################################################
629: ################################################
630:
631: =pod
632:
633: =item &delete_caches()
634:
1.144 matthew 635: This routine drops all the tables associated with a course from the
636: MySQL database.
637:
638: Input: course id (optional, determined by environment if omitted)
639:
640: Returns: nothing
641:
1.70 matthew 642: =cut
643:
644: ################################################
645: ################################################
646: sub delete_caches {
647: my $courseid = shift;
1.146 albertel 648: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.70 matthew 649: #
650: &setup_table_names($courseid);
651: #
652: my $dbh = &Apache::lonmysql::get_dbh();
1.89 matthew 653: foreach my $table (@Tables) {
1.70 matthew 654: my $command = 'DROP TABLE '.$table.';';
655: $dbh->do($command);
656: if ($dbh->err) {
657: &Apache::lonnet::logthis($command.' resulted in error: '.$dbh->errstr);
658: }
659: }
660: return;
1.57 matthew 661: }
662:
663: ################################################
664: ################################################
665:
666: =pod
667:
668: =item &get_part_id()
669:
670: Get the MySQL id of a problem part string.
671:
672: Input: $part
673:
674: Output: undef on error, integer $part_id on success.
675:
676: =item &get_part()
677:
678: Get the string describing a part from the MySQL id of the problem part.
679:
680: Input: $part_id
681:
682: Output: undef on error, $part string on success.
683:
684: =cut
685:
686: ################################################
687: ################################################
688:
1.61 matthew 689: my $have_read_part_table = 0;
1.57 matthew 690: my %ids_by_part;
691: my %parts_by_id;
692:
693: sub get_part_id {
694: my ($part) = @_;
1.61 matthew 695: $part = 0 if (! defined($part));
696: if (! $have_read_part_table) {
697: my @Result = &Apache::lonmysql::get_rows($part_table);
698: foreach (@Result) {
699: $ids_by_part{$_->[1]}=$_->[0];
700: }
701: $have_read_part_table = 1;
702: }
1.57 matthew 703: if (! exists($ids_by_part{$part})) {
704: &Apache::lonmysql::store_row($part_table,[undef,$part]);
705: undef(%ids_by_part);
706: my @Result = &Apache::lonmysql::get_rows($part_table);
707: foreach (@Result) {
708: $ids_by_part{$_->[1]}=$_->[0];
709: }
710: }
711: return $ids_by_part{$part} if (exists($ids_by_part{$part}));
712: return undef; # error
713: }
714:
715: sub get_part {
716: my ($part_id) = @_;
717: if (! exists($parts_by_id{$part_id}) ||
718: ! defined($parts_by_id{$part_id}) ||
719: $parts_by_id{$part_id} eq '') {
720: my @Result = &Apache::lonmysql::get_rows($part_table);
721: foreach (@Result) {
722: $parts_by_id{$_->[0]}=$_->[1];
723: }
724: }
725: return $parts_by_id{$part_id} if(exists($parts_by_id{$part_id}));
726: return undef; # error
727: }
728:
729: ################################################
730: ################################################
731:
732: =pod
733:
734: =item &get_symb_id()
735:
736: Get the MySQL id of a symb.
737:
738: Input: $symb
739:
740: Output: undef on error, integer $symb_id on success.
741:
742: =item &get_symb()
743:
744: Get the symb associated with a MySQL symb_id.
745:
746: Input: $symb_id
747:
748: Output: undef on error, $symb on success.
749:
750: =cut
751:
752: ################################################
753: ################################################
754:
1.61 matthew 755: my $have_read_symb_table = 0;
1.57 matthew 756: my %ids_by_symb;
757: my %symbs_by_id;
758:
759: sub get_symb_id {
760: my ($symb) = @_;
1.61 matthew 761: if (! $have_read_symb_table) {
762: my @Result = &Apache::lonmysql::get_rows($symb_table);
763: foreach (@Result) {
764: $ids_by_symb{$_->[1]}=$_->[0];
765: }
766: $have_read_symb_table = 1;
767: }
1.57 matthew 768: if (! exists($ids_by_symb{$symb})) {
769: &Apache::lonmysql::store_row($symb_table,[undef,$symb]);
770: undef(%ids_by_symb);
771: my @Result = &Apache::lonmysql::get_rows($symb_table);
772: foreach (@Result) {
773: $ids_by_symb{$_->[1]}=$_->[0];
774: }
775: }
776: return $ids_by_symb{$symb} if(exists( $ids_by_symb{$symb}));
777: return undef; # error
778: }
779:
780: sub get_symb {
781: my ($symb_id) = @_;
782: if (! exists($symbs_by_id{$symb_id}) ||
783: ! defined($symbs_by_id{$symb_id}) ||
784: $symbs_by_id{$symb_id} eq '') {
785: my @Result = &Apache::lonmysql::get_rows($symb_table);
786: foreach (@Result) {
787: $symbs_by_id{$_->[0]}=$_->[1];
788: }
789: }
790: return $symbs_by_id{$symb_id} if(exists( $symbs_by_id{$symb_id}));
791: return undef; # error
792: }
793:
794: ################################################
795: ################################################
796:
797: =pod
798:
799: =item &get_student_id()
800:
801: Get the MySQL id of a student.
802:
803: Input: $sname, $dom
804:
805: Output: undef on error, integer $student_id on success.
806:
807: =item &get_student()
808:
809: Get student username:domain associated with the MySQL student_id.
810:
811: Input: $student_id
812:
813: Output: undef on error, string $student (username:domain) on success.
814:
815: =cut
816:
817: ################################################
818: ################################################
819:
1.61 matthew 820: my $have_read_student_table = 0;
1.57 matthew 821: my %ids_by_student;
822: my %students_by_id;
823:
824: sub get_student_id {
825: my ($sname,$sdom) = @_;
826: my $student = $sname.':'.$sdom;
1.61 matthew 827: if (! $have_read_student_table) {
828: my @Result = &Apache::lonmysql::get_rows($student_table);
829: foreach (@Result) {
830: $ids_by_student{$_->[1]}=$_->[0];
831: }
832: $have_read_student_table = 1;
833: }
1.57 matthew 834: if (! exists($ids_by_student{$student})) {
1.113 matthew 835: &populate_student_table();
1.57 matthew 836: undef(%ids_by_student);
1.113 matthew 837: undef(%students_by_id);
1.57 matthew 838: my @Result = &Apache::lonmysql::get_rows($student_table);
839: foreach (@Result) {
840: $ids_by_student{$_->[1]}=$_->[0];
841: }
842: }
843: return $ids_by_student{$student} if(exists( $ids_by_student{$student}));
844: return undef; # error
845: }
846:
847: sub get_student {
848: my ($student_id) = @_;
849: if (! exists($students_by_id{$student_id}) ||
850: ! defined($students_by_id{$student_id}) ||
851: $students_by_id{$student_id} eq '') {
852: my @Result = &Apache::lonmysql::get_rows($student_table);
853: foreach (@Result) {
854: $students_by_id{$_->[0]}=$_->[1];
855: }
856: }
857: return $students_by_id{$student_id} if(exists($students_by_id{$student_id}));
858: return undef; # error
859: }
1.99 matthew 860:
1.113 matthew 861: sub populate_student_table {
862: my ($courseid) = @_;
863: if (! defined($courseid)) {
1.146 albertel 864: $courseid = $env{'request.course.id'};
1.113 matthew 865: }
866: #
867: &setup_table_names($courseid);
1.134 matthew 868: &init_dbs($courseid,0);
1.113 matthew 869: my $dbh = &Apache::lonmysql::get_dbh();
870: my $request = 'INSERT IGNORE INTO '.$student_table.
871: "(student,section,status) VALUES ";
872: my $classlist = &get_classlist($courseid);
873: my $student_count=0;
874: while (my ($student,$data) = each %$classlist) {
875: my ($section,$status) = ($data->[&CL_SECTION()],
876: $data->[&CL_STATUS()]);
877: if ($section eq '' || $section =~ /^\s*$/) {
878: $section = 'none';
879: }
880: $request .= "('".$student."','".$section."','".$status."'),";
881: $student_count++;
882: }
883: return if ($student_count == 0);
884: chop($request);
885: $dbh->do($request);
886: if ($dbh->err()) {
887: &Apache::lonnet::logthis("error ".$dbh->errstr().
888: " occured executing \n".
889: $request);
890: }
891: return;
892: }
893:
1.99 matthew 894: ################################################
895: ################################################
896:
897: =pod
898:
899: =item &clear_internal_caches()
900:
901: Causes the internal caches used in get_student_id, get_student,
902: get_symb_id, get_symb, get_part_id, and get_part to be undef'd.
903:
904: Needs to be called before the first operation with the MySQL database
905: for a given Apache request.
906:
907: =cut
908:
909: ################################################
910: ################################################
911: sub clear_internal_caches {
912: $have_read_part_table = 0;
913: undef(%ids_by_part);
914: undef(%parts_by_id);
915: $have_read_symb_table = 0;
916: undef(%ids_by_symb);
917: undef(%symbs_by_id);
918: $have_read_student_table = 0;
919: undef(%ids_by_student);
920: undef(%students_by_id);
921: }
922:
1.57 matthew 923: ################################################
924: ################################################
925:
926: =pod
927:
1.89 matthew 928: =item &update_full_student_data($sname,$sdom,$courseid)
929:
930: Does a lonnet::dump on a student to populate the courses tables.
931:
932: Input: $sname, $sdom, $courseid
933:
934: Output: $returnstatus
935:
936: $returnstatus is a string describing any errors that occured. 'okay' is the
937: default.
938:
939: This subroutine loads a students data using lonnet::dump and inserts
940: it into the MySQL database. The inserts are done on three tables,
941: $fulldump_response_table, $fulldump_part_table, and $fulldump_timestamp_table.
942: The INSERT calls are made directly by this subroutine, not through lonmysql
943: because we do a 'bulk'insert which takes advantage of MySQLs non-SQL
944: compliant INSERT command to insert multiple rows at a time.
945: If anything has gone wrong during this process, $returnstatus is updated with
946: a description of the error.
947:
948: Once the "fulldump" tables are updated, the tables used for chart and
949: spreadsheet (which hold only the current state of the student on their
950: homework, not historical data) are updated. If all updates have occured
1.113 matthew 951: successfully, $student_table is updated to reflect the time of the update.
1.89 matthew 952:
953: Notice we do not insert the data and immediately query it. This means it
954: is possible for there to be data returned this first time that is not
955: available the second time. CYA.
956:
957: =cut
958:
959: ################################################
960: ################################################
961: sub update_full_student_data {
962: my ($sname,$sdom,$courseid) = @_;
963: #
964: # Set up database names
965: &setup_table_names($courseid);
966: #
967: my $student_id = &get_student_id($sname,$sdom);
968: my $student = $sname.':'.$sdom;
969: #
970: my $returnstatus = 'okay';
971: #
972: # Download students data
973: my $time_of_retrieval = time;
974: my @tmp = &Apache::lonnet::dump($courseid,$sdom,$sname);
975: if (@tmp && $tmp[0] =~ /^error/) {
976: $returnstatus = 'error retrieving full student data';
977: return $returnstatus;
978: } elsif (! @tmp) {
979: $returnstatus = 'okay: no student data';
980: return $returnstatus;
981: }
982: my %studentdata = @tmp;
983: #
984: # Get database handle and clean out the tables
985: my $dbh = &Apache::lonmysql::get_dbh();
986: $dbh->do('DELETE FROM '.$fulldump_response_table.' WHERE student_id='.
987: $student_id);
988: $dbh->do('DELETE FROM '.$fulldump_part_table.' WHERE student_id='.
989: $student_id);
990: $dbh->do('DELETE FROM '.$fulldump_timestamp_table.' WHERE student_id='.
991: $student_id);
992: #
993: # Parse and store the data into a form we can handle
994: my $partdata;
995: my $respdata;
996: while (my ($key,$value) = each(%studentdata)) {
997: next if ($key =~ /^(\d+):(resource$|subnum$|keys:)/);
998: my ($transaction,$symb,$parameter) = split(':',$key);
999: my $symb_id = &get_symb_id($symb);
1000: if ($parameter eq 'timestamp') {
1001: # We can deal with 'timestamp' right away
1002: my @timestamp_storage = ($symb_id,$student_id,
1003: $transaction,$value);
1.98 matthew 1004: my $store_command = 'INSERT IGNORE INTO '.$fulldump_timestamp_table.
1.89 matthew 1005: " VALUES ('".join("','",@timestamp_storage)."');";
1006: $dbh->do($store_command);
1007: if ($dbh->err()) {
1008: &Apache::lonnet::logthis('unable to execute '.$store_command);
1009: &Apache::lonnet::logthis($dbh->errstr());
1010: }
1011: next;
1012: } elsif ($parameter eq 'version') {
1013: next;
1.90 matthew 1014: } elsif ($parameter =~ /^resource\.(.*)\.(tries|
1015: award|
1016: awarded|
1017: previous|
1018: solved|
1019: awarddetail|
1020: submission|
1021: submissiongrading|
1022: molecule)\s*$/x){
1.89 matthew 1023: # we do not have enough information to store an
1024: # entire row, so we save it up until later.
1025: my ($part_and_resp_id,$field) = ($1,$2);
1026: my ($part,$part_id,$resp,$resp_id);
1027: if ($part_and_resp_id =~ /\./) {
1028: ($part,$resp) = split(/\./,$part_and_resp_id);
1029: $part_id = &get_part_id($part);
1030: $resp_id = &get_part_id($resp);
1031: } else {
1032: $part_id = &get_part_id($part_and_resp_id);
1033: }
1.90 matthew 1034: # Deal with part specific data
1.89 matthew 1035: if ($field =~ /^(tries|award|awarded|previous)$/) {
1036: $partdata->{$symb_id}->{$part_id}->{$transaction}->{$field}=$value;
1037: }
1.90 matthew 1038: # deal with response specific data
1.89 matthew 1039: if (defined($resp_id) &&
1.100 matthew 1040: $field =~ /^(awarddetail|
1.90 matthew 1041: submission|
1042: submissiongrading|
1043: molecule)$/x) {
1.89 matthew 1044: if ($field eq 'submission') {
1045: # We have to be careful with user supplied input.
1046: # most of the time we are okay because it is escaped.
1047: # However, there is one wrinkle: submissions which end in
1048: # and odd number of '\' cause insert errors to occur.
1049: # Best trap this somehow...
1.116 matthew 1050: $value = $dbh->quote($value);
1.89 matthew 1051: }
1.90 matthew 1052: if ($field eq 'submissiongrading' ||
1053: $field eq 'molecule') {
1054: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific'}=$field;
1055: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific_value'}=$value;
1056: } else {
1057: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{$field}=$value;
1058: }
1.89 matthew 1059: }
1060: }
1061: }
1062: ##
1063: ## Store the part data
1.98 matthew 1064: my $store_command = 'INSERT IGNORE INTO '.$fulldump_part_table.
1.89 matthew 1065: ' VALUES '."\n";
1066: my $store_rows = 0;
1067: while (my ($symb_id,$hash1) = each (%$partdata)) {
1068: while (my ($part_id,$hash2) = each (%$hash1)) {
1069: while (my ($transaction,$data) = each (%$hash2)) {
1070: $store_command .= "('".join("','",$symb_id,$part_id,
1071: $student_id,
1072: $transaction,
1.101 matthew 1073: $data->{'tries'},
1.89 matthew 1074: $data->{'award'},
1075: $data->{'awarded'},
1076: $data->{'previous'})."'),";
1077: $store_rows++;
1078: }
1079: }
1080: }
1081: if ($store_rows) {
1082: chop($store_command);
1083: $dbh->do($store_command);
1084: if ($dbh->err) {
1085: $returnstatus = 'error storing part data';
1086: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
1087: &Apache::lonnet::logthis("While attempting\n".$store_command);
1088: }
1089: }
1090: ##
1091: ## Store the response data
1.98 matthew 1092: $store_command = 'INSERT IGNORE INTO '.$fulldump_response_table.
1.89 matthew 1093: ' VALUES '."\n";
1094: $store_rows = 0;
1095: while (my ($symb_id,$hash1) = each (%$respdata)) {
1096: while (my ($part_id,$hash2) = each (%$hash1)) {
1097: while (my ($resp_id,$hash3) = each (%$hash2)) {
1098: while (my ($transaction,$data) = each (%$hash3)) {
1.112 matthew 1099: my $submission = $data->{'submission'};
1100: # We have to be careful with user supplied input.
1101: # most of the time we are okay because it is escaped.
1102: # However, there is one wrinkle: submissions which end in
1103: # and odd number of '\' cause insert errors to occur.
1104: # Best trap this somehow...
1105: $submission = $dbh->quote($submission);
1106: $store_command .= "('".
1107: join("','",$symb_id,$part_id,
1108: $resp_id,$student_id,
1109: $transaction,
1110: $data->{'awarddetail'},
1111: $data->{'response_specific'},
1112: $data->{'response_specific_value'}).
1113: "',".$submission."),";
1.89 matthew 1114: $store_rows++;
1115: }
1116: }
1117: }
1118: }
1119: if ($store_rows) {
1120: chop($store_command);
1121: $dbh->do($store_command);
1122: if ($dbh->err) {
1123: $returnstatus = 'error storing response data';
1124: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
1125: &Apache::lonnet::logthis("While attempting\n".$store_command);
1126: }
1127: }
1128: ##
1129: ## Update the students "current" data in the performance
1130: ## and parameters tables.
1131: my ($status,undef) = &store_student_data
1132: ($sname,$sdom,$courseid,
1133: &Apache::lonnet::convert_dump_to_currentdump(\%studentdata));
1134: if ($returnstatus eq 'okay' && $status ne 'okay') {
1135: $returnstatus = 'error storing current data:'.$status;
1136: } elsif ($status ne 'okay') {
1137: $returnstatus .= ' error storing current data:'.$status;
1138: }
1139: ##
1140: ## Update the students time......
1141: if ($returnstatus eq 'okay') {
1.113 matthew 1142: &store_updatetime($student_id,$time_of_retrieval,$time_of_retrieval);
1143: if ($dbh->err) {
1144: if ($returnstatus eq 'okay') {
1145: $returnstatus = 'error updating student time';
1146: } else {
1147: $returnstatus = 'error updating student time';
1148: }
1149: }
1.89 matthew 1150: }
1151: return $returnstatus;
1152: }
1153:
1154: ################################################
1155: ################################################
1156:
1157: =pod
1158:
1.57 matthew 1159: =item &update_student_data()
1160:
1161: Input: $sname, $sdom, $courseid
1162:
1163: Output: $returnstatus, \%student_data
1164:
1165: $returnstatus is a string describing any errors that occured. 'okay' is the
1166: default.
1167: \%student_data is the data returned by a call to lonnet::currentdump.
1168:
1169: This subroutine loads a students data using lonnet::currentdump and inserts
1170: it into the MySQL database. The inserts are done on two tables,
1171: $performance_table and $parameters_table. $parameters_table holds the data
1172: that is not included in $performance_table. See the description of
1173: $performance_table elsewhere in this file. The INSERT calls are made
1174: directly by this subroutine, not through lonmysql because we do a 'bulk'
1175: insert which takes advantage of MySQLs non-SQL compliant INSERT command to
1176: insert multiple rows at a time. If anything has gone wrong during this
1177: process, $returnstatus is updated with a description of the error and
1178: \%student_data is returned.
1179:
1180: Notice we do not insert the data and immediately query it. This means it
1181: is possible for there to be data returned this first time that is not
1182: available the second time. CYA.
1183:
1184: =cut
1185:
1186: ################################################
1187: ################################################
1188: sub update_student_data {
1189: my ($sname,$sdom,$courseid) = @_;
1190: #
1.60 matthew 1191: # Set up database names
1192: &setup_table_names($courseid);
1193: #
1.57 matthew 1194: my $student_id = &get_student_id($sname,$sdom);
1195: my $student = $sname.':'.$sdom;
1196: #
1197: my $returnstatus = 'okay';
1198: #
1199: # Download students data
1200: my $time_of_retrieval = time;
1201: my @tmp = &Apache::lonnet::currentdump($courseid,$sdom,$sname);
1202: if ((scalar(@tmp) > 0) && ($tmp[0] =~ /^error:/)) {
1203: &Apache::lonnet::logthis('error getting data for '.
1204: $sname.':'.$sdom.' in course '.$courseid.
1205: ':'.$tmp[0]);
1206: $returnstatus = 'error getting data';
1.79 matthew 1207: return ($returnstatus,undef);
1.57 matthew 1208: }
1209: if (scalar(@tmp) < 1) {
1210: return ('no data',undef);
1211: }
1212: my %student_data = @tmp;
1.89 matthew 1213: my @Results = &store_student_data($sname,$sdom,$courseid,\%student_data);
1214: #
1215: # Set the students update time
1.96 matthew 1216: if ($Results[0] eq 'okay') {
1.148 ! matthew 1217: &store_updatetime($student_id,$time_of_retrieval);
1.95 matthew 1218: }
1.89 matthew 1219: #
1220: return @Results;
1221: }
1222:
1.113 matthew 1223: sub store_updatetime {
1224: my ($student_id,$updatetime,$fullupdatetime)=@_;
1225: my $values = '';
1226: if (defined($updatetime)) {
1227: $values = 'updatetime='.$updatetime.' ';
1228: }
1229: if (defined($fullupdatetime)) {
1230: if ($values ne '') {
1231: $values .= ',';
1232: }
1233: $values .= 'fullupdatetime='.$fullupdatetime.' ';
1234: }
1235: return if ($values eq '');
1236: my $dbh = &Apache::lonmysql::get_dbh();
1237: my $request = 'UPDATE '.$student_table.' SET '.$values.
1238: ' WHERE student_id='.$student_id.' LIMIT 1';
1239: $dbh->do($request);
1240: }
1241:
1.89 matthew 1242: sub store_student_data {
1243: my ($sname,$sdom,$courseid,$student_data) = @_;
1244: #
1245: my $student_id = &get_student_id($sname,$sdom);
1246: my $student = $sname.':'.$sdom;
1247: #
1248: my $returnstatus = 'okay';
1.57 matthew 1249: #
1250: # Remove all of the students data from the table
1.60 matthew 1251: my $dbh = &Apache::lonmysql::get_dbh();
1252: $dbh->do('DELETE FROM '.$performance_table.' WHERE student_id='.
1253: $student_id);
1254: $dbh->do('DELETE FROM '.$parameters_table.' WHERE student_id='.
1255: $student_id);
1.57 matthew 1256: #
1257: # Store away the data
1258: #
1259: my $starttime = Time::HiRes::time;
1260: my $elapsed = 0;
1261: my $rows_stored;
1.98 matthew 1262: my $store_parameters_command = 'INSERT IGNORE INTO '.$parameters_table.
1.60 matthew 1263: ' VALUES '."\n";
1.61 matthew 1264: my $num_parameters = 0;
1.98 matthew 1265: my $store_performance_command = 'INSERT IGNORE INTO '.$performance_table.
1.60 matthew 1266: ' VALUES '."\n";
1.79 matthew 1267: return ('error',undef) if (! defined($dbh));
1.89 matthew 1268: while (my ($current_symb,$param_hash) = each(%{$student_data})) {
1.57 matthew 1269: #
1270: # make sure the symb is set up properly
1271: my $symb_id = &get_symb_id($current_symb);
1272: #
1.147 matthew 1273: # Parameters
1.63 matthew 1274: while (my ($parameter,$value) = each(%$param_hash)) {
1275: if ($parameter !~ /(timestamp|resource\.(.*)\.(solved|tries|awarded|award|awarddetail|previous))/) {
1.147 matthew 1276: my $sql_parameter = "('".join("','",
1277: $symb_id,$student_id,
1278: $parameter)."',".
1279: $dbh->quote($value)."),\n";
1.61 matthew 1280: $num_parameters ++;
1.147 matthew 1281: if ($sql_parameter !~ /''/) {
1282: $store_parameters_command .= $sql_parameter;
1.57 matthew 1283: $rows_stored++;
1284: }
1285: }
1.147 matthew 1286: }
1287: # Performance
1288: my %stored;
1289: while (my ($parameter,$value) = each(%$param_hash)) {
1290: next if ($parameter !~ /^resource\.(.*)\.(solved|awarded)$/);
1291: my $part = $1;
1292: next if (exists($stored{$part}));
1293: $stored{$part}++;
1.57 matthew 1294: #
1295: my $part_id = &get_part_id($part);
1296: next if (!defined($part_id));
1297: my $solved = $value;
1298: my $tries = $param_hash->{'resource.'.$part.'.tries'};
1299: my $awarded = $param_hash->{'resource.'.$part.'.awarded'};
1300: my $award = $param_hash->{'resource.'.$part.'.award'};
1301: my $awarddetail = $param_hash->{'resource.'.$part.'.awarddetail'};
1302: my $timestamp = $param_hash->{'timestamp'};
1.60 matthew 1303: #
1.74 matthew 1304: $solved = '' if (! defined($solved));
1.57 matthew 1305: $tries = '' if (! defined($tries));
1306: $awarded = '' if (! defined($awarded));
1307: $award = '' if (! defined($award));
1308: $awarddetail = '' if (! defined($awarddetail));
1.147 matthew 1309: my $sql_performance =
1310: "('".join("','",$symb_id,$student_id,$part_id,$part,
1311: $solved,$tries,$awarded,$award,
1312: $awarddetail,$timestamp)."'),\n";
1313: $store_performance_command .= $sql_performance;
1.57 matthew 1314: $rows_stored++;
1315: }
1316: }
1.147 matthew 1317: $store_parameters_command =~ s|,\n$||;
1318: $store_performance_command =~ s|,\n$||;
1.57 matthew 1319: my $start = Time::HiRes::time;
1.94 matthew 1320: $dbh->do($store_performance_command);
1321: if ($dbh->err()) {
1.147 matthew 1322: &Apache::lonnet::logthis('performance bigass insert error:'.
1323: $dbh->errstr());
1324: &Apache::lonnet::logthis('command = '.$/.$store_performance_command);
1.94 matthew 1325: $returnstatus = 'error: unable to insert performance into database';
1326: return ($returnstatus,$student_data);
1327: }
1.61 matthew 1328: $dbh->do($store_parameters_command) if ($num_parameters>0);
1.57 matthew 1329: if ($dbh->err()) {
1.147 matthew 1330: &Apache::lonnet::logthis('parameters bigass insert error:'.
1331: $dbh->errstr());
1332: &Apache::lonnet::logthis('command = '.$/.$store_parameters_command);
1.87 matthew 1333: &Apache::lonnet::logthis('rows_stored = '.$rows_stored);
1334: &Apache::lonnet::logthis('student_id = '.$student_id);
1.57 matthew 1335: $returnstatus = 'error: unable to insert parameters into database';
1.89 matthew 1336: return ($returnstatus,$student_data);
1.57 matthew 1337: }
1338: $elapsed += Time::HiRes::time - $start;
1.89 matthew 1339: return ($returnstatus,$student_data);
1.57 matthew 1340: }
1341:
1.89 matthew 1342: ######################################
1343: ######################################
1.57 matthew 1344:
1345: =pod
1346:
1.89 matthew 1347: =item &ensure_tables_are_set_up($courseid)
1.57 matthew 1348:
1.89 matthew 1349: Checks to be sure the MySQL tables for the given class are set up.
1350: If $courseid is omitted it will be obtained from the environment.
1.57 matthew 1351:
1.89 matthew 1352: Returns nothing on success and 'error' on failure
1.57 matthew 1353:
1354: =cut
1355:
1.89 matthew 1356: ######################################
1357: ######################################
1358: sub ensure_tables_are_set_up {
1359: my ($courseid) = @_;
1.146 albertel 1360: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.61 matthew 1361: #
1362: # Clean out package variables
1.57 matthew 1363: &setup_table_names($courseid);
1364: #
1365: # if the tables do not exist, make them
1366: my @CurrentTable = &Apache::lonmysql::tables_in_db();
1.113 matthew 1367: my ($found_symb,$found_student,$found_part,
1.89 matthew 1368: $found_performance,$found_parameters,$found_fulldump_part,
1.127 matthew 1369: $found_fulldump_response,$found_fulldump_timestamp,
1370: $found_weight);
1.57 matthew 1371: foreach (@CurrentTable) {
1372: $found_symb = 1 if ($_ eq $symb_table);
1373: $found_student = 1 if ($_ eq $student_table);
1374: $found_part = 1 if ($_ eq $part_table);
1375: $found_performance = 1 if ($_ eq $performance_table);
1376: $found_parameters = 1 if ($_ eq $parameters_table);
1.89 matthew 1377: $found_fulldump_part = 1 if ($_ eq $fulldump_part_table);
1378: $found_fulldump_response = 1 if ($_ eq $fulldump_response_table);
1379: $found_fulldump_timestamp = 1 if ($_ eq $fulldump_timestamp_table);
1.127 matthew 1380: $found_weight = 1 if ($_ eq $weight_table);
1.57 matthew 1381: }
1.127 matthew 1382: if (!$found_symb ||
1383: !$found_student || !$found_part ||
1384: !$found_performance || !$found_parameters ||
1.89 matthew 1385: !$found_fulldump_part || !$found_fulldump_response ||
1.127 matthew 1386: !$found_fulldump_timestamp || !$found_weight ) {
1.134 matthew 1387: if (&init_dbs($courseid,1)) {
1.89 matthew 1388: return 'error';
1.57 matthew 1389: }
1390: }
1.89 matthew 1391: }
1392:
1393: ################################################
1394: ################################################
1395:
1396: =pod
1397:
1398: =item &ensure_current_data()
1399:
1400: Input: $sname, $sdom, $courseid
1401:
1402: Output: $status, $data
1403:
1404: This routine ensures the data for a given student is up to date.
1.113 matthew 1405: The $student_table is queried to determine the time of the last update.
1.89 matthew 1406: If the students data is out of date, &update_student_data() is called.
1407: The return values from the call to &update_student_data() are returned.
1408:
1409: =cut
1410:
1411: ################################################
1412: ################################################
1413: sub ensure_current_data {
1414: my ($sname,$sdom,$courseid) = @_;
1415: my $status = 'okay'; # return value
1416: #
1.146 albertel 1417: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.89 matthew 1418: &ensure_tables_are_set_up($courseid);
1.57 matthew 1419: #
1420: # Get the update time for the user
1421: my $updatetime = 0;
1.60 matthew 1422: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1423: ($sdom,$sname,$courseid.'.db',
1424: $Apache::lonnet::perlvar{'lonUsersDir'});
1.57 matthew 1425: #
1.87 matthew 1426: my $student_id = &get_student_id($sname,$sdom);
1.113 matthew 1427: my @Result = &Apache::lonmysql::get_rows($student_table,
1.87 matthew 1428: "student_id ='$student_id'");
1.57 matthew 1429: my $data = undef;
1430: if (@Result) {
1.113 matthew 1431: $updatetime = $Result[0]->[5]; # Ack! This is dumb!
1.57 matthew 1432: }
1433: if ($modifiedtime > $updatetime) {
1434: ($status,$data) = &update_student_data($sname,$sdom,$courseid);
1435: }
1436: return ($status,$data);
1437: }
1438:
1439: ################################################
1440: ################################################
1441:
1442: =pod
1443:
1.89 matthew 1444: =item &ensure_current_full_data($sname,$sdom,$courseid)
1445:
1446: Input: $sname, $sdom, $courseid
1447:
1448: Output: $status
1449:
1450: This routine ensures the fulldata (the data from a lonnet::dump, not a
1451: lonnet::currentdump) for a given student is up to date.
1.113 matthew 1452: The $student_table is queried to determine the time of the last update.
1.89 matthew 1453: If the students fulldata is out of date, &update_full_student_data() is
1454: called.
1455:
1456: The return value from the call to &update_full_student_data() is returned.
1457:
1458: =cut
1459:
1460: ################################################
1461: ################################################
1462: sub ensure_current_full_data {
1463: my ($sname,$sdom,$courseid) = @_;
1464: my $status = 'okay'; # return value
1465: #
1.146 albertel 1466: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.89 matthew 1467: &ensure_tables_are_set_up($courseid);
1468: #
1469: # Get the update time for the user
1470: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1471: ($sdom,$sname,$courseid.'.db',
1472: $Apache::lonnet::perlvar{'lonUsersDir'});
1473: #
1474: my $student_id = &get_student_id($sname,$sdom);
1.113 matthew 1475: my @Result = &Apache::lonmysql::get_rows($student_table,
1.89 matthew 1476: "student_id ='$student_id'");
1477: my $updatetime;
1478: if (@Result && ref($Result[0]) eq 'ARRAY') {
1.113 matthew 1479: $updatetime = $Result[0]->[6];
1.89 matthew 1480: }
1481: if (! defined($updatetime) || $modifiedtime > $updatetime) {
1482: $status = &update_full_student_data($sname,$sdom,$courseid);
1483: }
1484: return $status;
1485: }
1486:
1487: ################################################
1488: ################################################
1489:
1490: =pod
1491:
1.57 matthew 1492: =item &get_student_data_from_performance_cache()
1493:
1494: Input: $sname, $sdom, $symb, $courseid
1495:
1496: Output: hash reference containing the data for the given student.
1497: If $symb is undef, all the students data is returned.
1498:
1499: This routine is the heart of the local caching system. See the description
1500: of $performance_table, $symb_table, $student_table, and $part_table. The
1501: main task is building the MySQL request. The tables appear in the request
1502: in the order in which they should be parsed by MySQL. When searching
1503: on a student the $student_table is used to locate the 'student_id'. All
1504: rows in $performance_table which have a matching 'student_id' are returned,
1505: with data from $part_table and $symb_table which match the entries in
1506: $performance_table, 'part_id' and 'symb_id'. When searching on a symb,
1507: the $symb_table is processed first, with matching rows grabbed from
1508: $performance_table and filled in from $part_table and $student_table in
1509: that order.
1510:
1511: Running 'EXPLAIN ' on the 'SELECT' statements generated can be quite
1512: interesting, especially if you play with the order the tables are listed.
1513:
1514: =cut
1515:
1516: ################################################
1517: ################################################
1518: sub get_student_data_from_performance_cache {
1519: my ($sname,$sdom,$symb,$courseid)=@_;
1520: my $student = $sname.':'.$sdom if (defined($sname) && defined($sdom));
1.61 matthew 1521: &setup_table_names($courseid);
1.57 matthew 1522: #
1523: # Return hash
1524: my $studentdata;
1525: #
1526: my $dbh = &Apache::lonmysql::get_dbh();
1527: my $request = "SELECT ".
1.73 matthew 1528: "d.symb,a.part,a.solved,a.tries,a.awarded,a.award,a.awarddetail,".
1.63 matthew 1529: "a.timestamp ";
1.57 matthew 1530: if (defined($student)) {
1531: $request .= "FROM $student_table AS b ".
1532: "LEFT JOIN $performance_table AS a ON b.student_id=a.student_id ".
1.73 matthew 1533: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1.57 matthew 1534: "LEFT JOIN $symb_table AS d ON d.symb_id = a.symb_id ".
1535: "WHERE student='$student'";
1536: if (defined($symb) && $symb ne '') {
1.67 matthew 1537: $request .= " AND d.symb=".$dbh->quote($symb);
1.57 matthew 1538: }
1539: } elsif (defined($symb) && $symb ne '') {
1540: $request .= "FROM $symb_table as d ".
1541: "LEFT JOIN $performance_table AS a ON d.symb_id=a.symb_id ".
1.73 matthew 1542: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1.57 matthew 1543: "LEFT JOIN $student_table AS b ON b.student_id = a.student_id ".
1544: "WHERE symb='".$dbh->quote($symb)."'";
1545: }
1546: my $starttime = Time::HiRes::time;
1547: my $rows_retrieved = 0;
1548: my $sth = $dbh->prepare($request);
1549: $sth->execute();
1550: if ($sth->err()) {
1551: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1552: &Apache::lonnet::logthis("\n".$request."\n");
1553: &Apache::lonnet::logthis("error is:".$sth->errstr());
1554: return undef;
1555: }
1556: foreach my $row (@{$sth->fetchall_arrayref}) {
1557: $rows_retrieved++;
1.63 matthew 1558: my ($symb,$part,$solved,$tries,$awarded,$award,$awarddetail,$time) =
1.57 matthew 1559: (@$row);
1560: my $base = 'resource.'.$part;
1561: $studentdata->{$symb}->{$base.'.solved'} = $solved;
1562: $studentdata->{$symb}->{$base.'.tries'} = $tries;
1563: $studentdata->{$symb}->{$base.'.awarded'} = $awarded;
1564: $studentdata->{$symb}->{$base.'.award'} = $award;
1565: $studentdata->{$symb}->{$base.'.awarddetail'} = $awarddetail;
1566: $studentdata->{$symb}->{'timestamp'} = $time if (defined($time) && $time ne '');
1.67 matthew 1567: }
1.97 matthew 1568: ## Get misc parameters
1569: $request = 'SELECT c.symb,a.parameter,a.value '.
1570: "FROM $student_table AS b ".
1571: "LEFT JOIN $parameters_table AS a ON b.student_id=a.student_id ".
1572: "LEFT JOIN $symb_table AS c ON c.symb_id = a.symb_id ".
1573: "WHERE student='$student'";
1574: if (defined($symb) && $symb ne '') {
1575: $request .= " AND c.symb=".$dbh->quote($symb);
1576: }
1577: $sth = $dbh->prepare($request);
1578: $sth->execute();
1579: if ($sth->err()) {
1580: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1581: &Apache::lonnet::logthis("\n".$request."\n");
1582: &Apache::lonnet::logthis("error is:".$sth->errstr());
1583: if (defined($symb) && $symb ne '') {
1584: $studentdata = $studentdata->{$symb};
1585: }
1586: return $studentdata;
1587: }
1588: #
1589: foreach my $row (@{$sth->fetchall_arrayref}) {
1590: $rows_retrieved++;
1591: my ($symb,$parameter,$value) = (@$row);
1592: $studentdata->{$symb}->{$parameter} = $value;
1593: }
1594: #
1.67 matthew 1595: if (defined($symb) && $symb ne '') {
1596: $studentdata = $studentdata->{$symb};
1.57 matthew 1597: }
1598: return $studentdata;
1599: }
1600:
1601: ################################################
1602: ################################################
1603:
1604: =pod
1605:
1606: =item &get_current_state()
1607:
1608: Input: $sname,$sdom,$symb,$courseid
1609:
1610: Output: Described below
1.46 matthew 1611:
1.47 matthew 1612: Retrieve the current status of a students performance. $sname and
1.46 matthew 1613: $sdom are the only required parameters. If $symb is undef the results
1.47 matthew 1614: of an &Apache::lonnet::currentdump() will be returned.
1.46 matthew 1615: If $courseid is undef it will be retrieved from the environment.
1616:
1617: The return structure is based on &Apache::lonnet::currentdump. If
1618: $symb is unspecified, all the students data is returned in a hash of
1619: the form:
1620: (
1621: symb1 => { param1 => value1, param2 => value2 ... },
1622: symb2 => { param1 => value1, param2 => value2 ... },
1623: )
1624:
1625: If $symb is specified, a hash of
1626: (
1627: param1 => value1,
1628: param2 => value2,
1629: )
1630: is returned.
1631:
1.57 matthew 1632: If no data is found for $symb, or if the student has no performance data,
1.46 matthew 1633: an empty list is returned.
1634:
1635: =cut
1636:
1637: ################################################
1638: ################################################
1639: sub get_current_state {
1.47 matthew 1640: my ($sname,$sdom,$symb,$courseid,$forcedownload)=@_;
1641: #
1.146 albertel 1642: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.47 matthew 1643: #
1.61 matthew 1644: return () if (! defined($sname) || ! defined($sdom));
1645: #
1.57 matthew 1646: my ($status,$data) = &ensure_current_data($sname,$sdom,$courseid);
1.77 matthew 1647: # &Apache::lonnet::logthis
1648: # ('sname = '.$sname.
1649: # ' domain = '.$sdom.
1650: # ' status = '.$status.
1651: # ' data is '.(defined($data)?'defined':'undefined'));
1.73 matthew 1652: # while (my ($symb,$hash) = each(%$data)) {
1653: # &Apache::lonnet::logthis($symb."\n----------------------------------");
1654: # while (my ($key,$value) = each (%$hash)) {
1655: # &Apache::lonnet::logthis(" ".$key." = ".$value);
1656: # }
1657: # }
1.47 matthew 1658: #
1.79 matthew 1659: if (defined($data) && defined($symb) && ref($data->{$symb})) {
1660: return %{$data->{$symb}};
1661: } elsif (defined($data) && ! defined($symb) && ref($data)) {
1662: return %$data;
1663: }
1664: if ($status eq 'no data') {
1.57 matthew 1665: return ();
1666: } else {
1667: if ($status ne 'okay' && $status ne '') {
1668: &Apache::lonnet::logthis('status = '.$status);
1.47 matthew 1669: return ();
1670: }
1.57 matthew 1671: my $returnhash = &get_student_data_from_performance_cache($sname,$sdom,
1672: $symb,$courseid);
1673: return %$returnhash if (defined($returnhash));
1.46 matthew 1674: }
1.57 matthew 1675: return ();
1.61 matthew 1676: }
1677:
1678: ################################################
1679: ################################################
1680:
1681: =pod
1682:
1683: =item &get_problem_statistics()
1684:
1685: Gather data on a given problem. The database is assumed to be
1686: populated and all local caching variables are assumed to be set
1687: properly. This means you need to call &ensure_current_data for
1688: the students you are concerned with prior to calling this routine.
1689:
1.124 matthew 1690: Inputs: $Sections, $status, $symb, $part, $courseid, $starttime, $endtime
1.61 matthew 1691:
1.64 matthew 1692: =over 4
1693:
1.124 matthew 1694: =item $Sections Array ref containing section names for students.
1695: 'all' is allowed to be the first (and only) item in the array.
1696:
1697: =item $status String describing the status of students
1.64 matthew 1698:
1699: =item $symb is the symb for the problem.
1700:
1701: =item $part is the part id you need statistics for
1702:
1703: =item $courseid is the course id, of course!
1704:
1.122 matthew 1705: =item $starttime and $endtime are unix times which to use to limit
1706: the statistical data.
1707:
1.64 matthew 1708: =back
1709:
1.66 matthew 1710: Outputs: See the code for up to date information. A hash reference is
1711: returned. The hash has the following keys defined:
1.64 matthew 1712:
1713: =over 4
1714:
1.66 matthew 1715: =item num_students The number of students attempting the problem
1716:
1717: =item tries The total number of tries for the students
1718:
1719: =item max_tries The maximum number of tries taken
1720:
1721: =item mean_tries The average number of tries
1722:
1723: =item num_solved The number of students able to solve the problem
1724:
1725: =item num_override The number of students whose answer is 'correct_by_override'
1726:
1727: =item deg_of_diff The degree of difficulty of the problem
1728:
1729: =item std_tries The standard deviation of the number of tries
1730:
1731: =item skew_tries The skew of the number of tries
1.64 matthew 1732:
1.66 matthew 1733: =item per_wrong The number of students attempting the problem who were not
1734: able to answer it correctly.
1.64 matthew 1735:
1736: =back
1737:
1.61 matthew 1738: =cut
1739:
1740: ################################################
1741: ################################################
1742: sub get_problem_statistics {
1.122 matthew 1743: my ($Sections,$status,$symb,$part,$courseid,$starttime,$endtime) = @_;
1.61 matthew 1744: return if (! defined($symb) || ! defined($part));
1.146 albertel 1745: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.61 matthew 1746: #
1.100 matthew 1747: &setup_table_names($courseid);
1.61 matthew 1748: my $symb_id = &get_symb_id($symb);
1749: my $part_id = &get_part_id($part);
1750: my $stats_table = $courseid.'_problem_stats';
1751: #
1752: my $dbh = &Apache::lonmysql::get_dbh();
1753: return undef if (! defined($dbh));
1754: #
1.123 matthew 1755: # Clean out the table
1.61 matthew 1756: $dbh->do('DROP TABLE '.$stats_table); # May return an error
1757: my $request =
1.115 matthew 1758: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
1759: 'SELECT a.student_id,a.solved,a.award,a.awarded,a.tries '.
1760: 'FROM '.$performance_table.' AS a ';
1.123 matthew 1761: #
1762: # See if we need to include some requirements on the students
1.115 matthew 1763: if ((defined($Sections) && lc($Sections->[0]) ne 'all') ||
1764: (defined($status) && lc($status) ne 'any')) {
1765: $request .= 'NATURAL LEFT JOIN '.$student_table.' AS b ';
1766: }
1767: $request .= ' WHERE a.symb_id='.$symb_id.' AND a.part_id='.$part_id;
1.123 matthew 1768: #
1769: # Limit the students included to those specified
1.115 matthew 1770: if (defined($Sections) && lc($Sections->[0]) ne 'all') {
1.64 matthew 1771: $request .= ' AND ('.
1.115 matthew 1772: join(' OR ', map { "b.section='".$_."'" } @$Sections
1.64 matthew 1773: ).')';
1774: }
1.115 matthew 1775: if (defined($status) && lc($status) ne 'any') {
1776: $request .= " AND b.status='".$status."'";
1.122 matthew 1777: }
1778: #
1.123 matthew 1779: # Limit by starttime and endtime
1.122 matthew 1780: my $time_requirements = undef;
1781: if (defined($starttime)) {
1782: $time_requirements .= 'a.timestamp>='.$starttime;
1783: if (defined($endtime)) {
1784: $time_requirements .= ' AND a.timestamp<='.$endtime;
1785: }
1786: } elsif (defined($endtime)) {
1787: $time_requirements .= 'a.timestamp<='.$endtime;
1788: }
1789: if (defined($time_requirements)) {
1790: $request .= ' AND '.$time_requirements;
1.115 matthew 1791: }
1.123 matthew 1792: #
1793: # Finally, execute the request to create the temporary table
1.61 matthew 1794: $dbh->do($request);
1.123 matthew 1795: #
1796: # Collect the first suite of statistics
1.128 matthew 1797: $request = 'SELECT COUNT(*),SUM(tries),'.
1798: 'AVG(tries),STD(tries) '.
1.109 matthew 1799: 'FROM '.$stats_table;
1.128 matthew 1800: my ($num,$tries,$mean,$STD) = &execute_SQL_request
1.109 matthew 1801: ($dbh,$request);
1.128 matthew 1802: #
1803: $request = 'SELECT MAX(tries),MIN(tries) FROM '.$stats_table.
1804: ' WHERE awarded>0';
1805: if (defined($time_requirements)) {
1806: $request .= ' AND '.$time_requirements;
1807: }
1808: my ($max,$min) = &execute_SQL_request($dbh,$request);
1809: #
1.109 matthew 1810: $request = 'SELECT SUM(awarded) FROM '.$stats_table;
1.128 matthew 1811: if (defined($time_requirements)) {
1812: $request .= ' AND '.$time_requirements;
1813: }
1.109 matthew 1814: my ($Solved) = &execute_SQL_request($dbh,$request);
1.128 matthew 1815: #
1.109 matthew 1816: $request = 'SELECT SUM(awarded) FROM '.$stats_table.
1817: " WHERE solved='correct_by_override'";
1.128 matthew 1818: if (defined($time_requirements)) {
1819: $request .= ' AND '.$time_requirements;
1820: }
1.109 matthew 1821: my ($solved) = &execute_SQL_request($dbh,$request);
1822: #
1.133 matthew 1823: $Solved -= $solved;
1824: #
1.61 matthew 1825: $num = 0 if (! defined($num));
1826: $tries = 0 if (! defined($tries));
1.128 matthew 1827: $max = 0 if (! defined($max));
1828: $min = 0 if (! defined($min));
1.61 matthew 1829: $STD = 0 if (! defined($STD));
1.133 matthew 1830: $Solved = 0 if (! defined($Solved) || $Solved < 0);
1.61 matthew 1831: $solved = 0 if (! defined($solved));
1832: #
1.123 matthew 1833: # Compute the more complicated statistics
1.61 matthew 1834: my $DegOfDiff = 'nan';
1.66 matthew 1835: $DegOfDiff = 1-($Solved)/$tries if ($tries>0);
1.123 matthew 1836: #
1.61 matthew 1837: my $SKEW = 'nan';
1.66 matthew 1838: my $wrongpercent = 0;
1.128 matthew 1839: my $numwrong = 'nan';
1.61 matthew 1840: if ($num > 0) {
1841: ($SKEW) = &execute_SQL_request($dbh,'SELECT SQRT(SUM('.
1842: 'POWER(tries - '.$STD.',3)'.
1843: '))/'.$num.' FROM '.$stats_table);
1.128 matthew 1844: $numwrong = $num-$Solved;
1845: $wrongpercent=int(10*100*$numwrong/$num)/10;
1.61 matthew 1846: }
1847: #
1.123 matthew 1848: # Drop the temporary table
1849: $dbh->do('DROP TABLE '.$stats_table); # May return an error
1.81 matthew 1850: #
1851: # Return result
1.66 matthew 1852: return { num_students => $num,
1853: tries => $tries,
1.128 matthew 1854: max_tries => $max,
1855: min_tries => $min,
1.66 matthew 1856: mean_tries => $mean,
1857: std_tries => $STD,
1858: skew_tries => $SKEW,
1859: num_solved => $Solved,
1860: num_override => $solved,
1.128 matthew 1861: num_wrong => $numwrong,
1.66 matthew 1862: per_wrong => $wrongpercent,
1.81 matthew 1863: deg_of_diff => $DegOfDiff };
1.61 matthew 1864: }
1865:
1.127 matthew 1866: ##
1867: ## This is a helper for get_statistics
1.61 matthew 1868: sub execute_SQL_request {
1869: my ($dbh,$request)=@_;
1870: # &Apache::lonnet::logthis($request);
1871: my $sth = $dbh->prepare($request);
1872: $sth->execute();
1873: my $row = $sth->fetchrow_arrayref();
1874: if (ref($row) eq 'ARRAY' && scalar(@$row)>0) {
1875: return @$row;
1876: }
1877: return ();
1878: }
1.123 matthew 1879:
1.127 matthew 1880: ######################################################
1881: ######################################################
1882:
1883: =pod
1884:
1885: =item &populate_weight_table
1886:
1887: =cut
1888:
1889: ######################################################
1890: ######################################################
1891: sub populate_weight_table {
1892: my ($courseid) = @_;
1893: if (! defined($courseid)) {
1.146 albertel 1894: $courseid = $env{'request.course.id'};
1.127 matthew 1895: }
1896: #
1897: &setup_table_names($courseid);
1.144 matthew 1898: my $navmap = Apache::lonnavmaps::navmap->new();
1899: if (!defined($navmap)) {
1900: &Apache::lonnet::logthis('loncoursedata::populate_weight_table:'.$/.
1901: ' unable to get navmaps resource'.$/.
1902: ' '.join(' ',(caller)));
1903: return;
1904: }
1905: my @sequences = $navmap->retrieveResources(undef,
1906: sub { shift->is_map(); },1,0,1);
1907: my @resources;
1908: foreach my $seq (@sequences) {
1909: push(@resources,$navmap->retrieveResources($seq,
1910: sub {shift->is_problem();},
1911: 0,0,0));
1912: }
1913: if (! scalar(@resources)) {
1914: &Apache::lonnet::logthis('loncoursedata::populate_weight_table:'.$/.
1915: ' no resources returned for '.$courseid);
1.127 matthew 1916: return;
1917: }
1918: # Since we use lonnet::EXT to retrieve problem weights,
1919: # to ensure current data we must clear the caches out.
1920: &Apache::lonnet::clear_EXT_cache_status();
1921: my $dbh = &Apache::lonmysql::get_dbh();
1922: my $request = 'INSERT IGNORE INTO '.$weight_table.
1923: "(symb_id,part_id,weight) VALUES ";
1924: my $weight;
1.144 matthew 1925: foreach my $res (@resources) {
1926: my $symb_id = &get_symb_id($res->symb);
1927: foreach my $part (@{$res->parts}) {
1.127 matthew 1928: my $part_id = &get_part_id($part);
1929: $weight = &Apache::lonnet::EXT('resource.'.$part.'.weight',
1.144 matthew 1930: $res->symb,
1.127 matthew 1931: undef,undef,undef);
1932: if (!defined($weight) || ($weight eq '')) {
1933: $weight=1;
1934: }
1935: $request .= "('".$symb_id."','".$part_id."','".$weight."'),";
1936: }
1937: }
1938: $request =~ s/(,)$//;
1939: # &Apache::lonnet::logthis('request = '.$/.$request);
1940: $dbh->do($request);
1941: if ($dbh->err()) {
1942: &Apache::lonnet::logthis("error ".$dbh->errstr().
1943: " occured executing \n".
1944: $request);
1945: }
1946: return;
1947: }
1948:
1949: ##########################################################
1950: ##########################################################
1.61 matthew 1951:
1.127 matthew 1952: =pod
1953:
1.129 matthew 1954: =item &limit_by_start_end_times
1955:
1956: Build SQL WHERE condition which limits the data collected by the start
1957: and end times provided
1958:
1959: Inputs: $starttime, $endtime, $table
1960:
1961: Returns: $time_limits
1962:
1963: =cut
1964:
1965: ##########################################################
1966: ##########################################################
1967: sub limit_by_start_end_time {
1968: my ($starttime,$endtime,$table) = @_;
1969: my $time_requirements = undef;
1970: if (defined($starttime)) {
1971: $time_requirements .= $table.".timestamp>='".$starttime."'";
1972: if (defined($endtime)) {
1973: $time_requirements .= " AND ".$table.".timestamp<='".$endtime."'";
1974: }
1975: } elsif (defined($endtime)) {
1976: $time_requirements .= $table.".timestamp<='".$endtime."'";
1977: }
1978: return $time_requirements;
1979: }
1980:
1981: ##########################################################
1982: ##########################################################
1983:
1984: =pod
1985:
1.127 matthew 1986: =item &limit_by_section_and_status
1987:
1988: Build SQL WHERE condition which limits the data collected by section and
1989: student status.
1990:
1991: Inputs: $Sections (array ref)
1992: $enrollment (string: 'any', 'expired', 'active')
1993: $tablename The name of the table that holds the student data
1994:
1995: Returns: $student_requirements,$enrollment_requirements
1996:
1997: =cut
1998:
1999: ##########################################################
2000: ##########################################################
2001: sub limit_by_section_and_status {
2002: my ($Sections,$enrollment,$tablename) = @_;
2003: my $student_requirements = undef;
2004: if ( (defined($Sections) && $Sections->[0] ne 'all')) {
2005: $student_requirements = '('.
2006: join(' OR ', map { $tablename.".section='".$_."'" } @$Sections
2007: ).')';
2008: }
2009: #
2010: my $enrollment_requirements=undef;
2011: if (defined($enrollment) && $enrollment ne 'Any') {
2012: $enrollment_requirements = $tablename.".status='".$enrollment."'";
2013: }
2014: return ($student_requirements,$enrollment_requirements);
2015: }
2016:
2017: ######################################################
2018: ######################################################
2019:
2020: =pod
2021:
2022: =item rank_students_by_scores_on_resources
2023:
2024: Inputs:
2025: $resources: array ref of hash ref. Each hash ref needs key 'symb'.
2026: $Sections: array ref of sections to include,
2027: $enrollment: string,
2028: $courseid (may be omitted)
2029:
2030: Returns; An array of arrays. The sub arrays contain a student name and
2031: their score on the resources.
2032:
2033: =cut
2034:
2035: ######################################################
2036: ######################################################
2037: sub RNK_student { return 0; };
2038: sub RNK_score { return 1; };
2039:
2040: sub rank_students_by_scores_on_resources {
1.130 matthew 2041: my ($resources,$Sections,$enrollment,$courseid,$starttime,$endtime) = @_;
1.127 matthew 2042: return if (! defined($resources) || ! ref($resources) eq 'ARRAY');
2043: if (! defined($courseid)) {
1.146 albertel 2044: $courseid = $env{'request.course.id'};
1.127 matthew 2045: }
2046: #
2047: &setup_table_names($courseid);
2048: my $dbh = &Apache::lonmysql::get_dbh();
2049: my ($section_limits,$enrollment_limits)=
2050: &limit_by_section_and_status($Sections,$enrollment,'b');
2051: my $symb_limits = '('.join(' OR ',map {'a.symb_id='.&get_symb_id($_);
2052: } @$resources
2053: ).')';
1.130 matthew 2054: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
1.127 matthew 2055: my $request = 'SELECT b.student,SUM(a.awarded*w.weight) AS score FROM '.
2056: $performance_table.' AS a '.
2057: 'NATURAL LEFT JOIN '.$weight_table.' AS w '.
2058: 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.
2059: 'WHERE ';
2060: if (defined($section_limits)) {
2061: $request .= $section_limits.' AND ';
2062: }
2063: if (defined($enrollment_limits)) {
2064: $request .= $enrollment_limits.' AND ';
2065: }
1.130 matthew 2066: if (defined($time_limits)) {
2067: $request .= $time_limits.' AND ';
2068: }
1.127 matthew 2069: if ($symb_limits ne '()') {
2070: $request .= $symb_limits.' AND ';
2071: }
2072: $request =~ s/( AND )$//; # Remove extra conjunction
2073: $request =~ s/( WHERE )$//; # In case there were no limits placed on it
2074: $request .= ' GROUP BY a.student_id ORDER BY score';
2075: #&Apache::lonnet::logthis('request = '.$/.$request);
2076: my $sth = $dbh->prepare($request);
2077: $sth->execute();
2078: my $rows = $sth->fetchall_arrayref();
2079: return ($rows);
2080: }
2081:
2082: ########################################################
2083: ########################################################
2084:
2085: =pod
2086:
2087: =item &get_sum_of_scores
2088:
2089: Inputs: $resource (hash ref, needs {'symb'} key),
2090: $part, (the part id),
2091: $students (array ref, contents of array are scalars holding 'sname:sdom'),
2092: $courseid
2093:
2094: Returns: the sum of the score on the problem part over the students and the
2095: maximum possible value for the sum (taken from the weight table).
2096:
2097: =cut
2098:
2099: ########################################################
2100: ########################################################
2101: sub get_sum_of_scores {
1.143 matthew 2102: my ($symb,$part,$students,$courseid,$starttime,$endtime) = @_;
1.127 matthew 2103: if (! defined($courseid)) {
1.146 albertel 2104: $courseid = $env{'request.course.id'};
1.127 matthew 2105: }
1.138 matthew 2106: if (defined($students) &&
2107: ((@$students == 0) ||
2108: (@$students == 1 && (! defined($students->[0]) ||
2109: $students->[0] eq ''))
2110: )
2111: ){
2112: undef($students);
2113: }
1.127 matthew 2114: #
2115: &setup_table_names($courseid);
2116: my $dbh = &Apache::lonmysql::get_dbh();
1.130 matthew 2117: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
1.127 matthew 2118: my $request = 'SELECT SUM(a.awarded*w.weight),SUM(w.weight) FROM '.
2119: $performance_table.' AS a '.
2120: 'NATURAL LEFT JOIN '.$weight_table.' AS w ';
1.143 matthew 2121: $request .= 'WHERE a.symb_id='.&get_symb_id($symb).
1.127 matthew 2122: ' AND a.part_id='.&get_part_id($part);
1.130 matthew 2123: if (defined($time_limits)) {
2124: $request .= ' AND '.$time_limits;
2125: }
1.127 matthew 2126: if (defined($students)) {
2127: $request .= ' AND ('.
2128: join(' OR ',map {'a.student_id='.&get_student_id(split(':',$_));
2129: } @$students).
2130: ')';
2131: }
2132: my $sth = $dbh->prepare($request);
2133: $sth->execute();
2134: my $rows = $sth->fetchrow_arrayref();
2135: if ($dbh->err) {
1.138 matthew 2136: &Apache::lonnet::logthis('error 1 = '.$dbh->errstr());
2137: &Apache::lonnet::logthis('prepared then executed, fetchrow_arrayrefed'.
2138: $/.$request);
1.127 matthew 2139: return (undef,undef);
2140: }
2141: return ($rows->[0],$rows->[1]);
2142: }
2143:
1.129 matthew 2144: ########################################################
2145: ########################################################
2146:
2147: =pod
2148:
2149: =item &score_stats
2150:
2151: Inputs: $Sections, $enrollment, $symbs, $starttime,
2152: $endtime, $courseid
2153:
2154: $Sections, $enrollment, $starttime, $endtime, and $courseid are the same as
2155: elsewhere in this module.
2156: $symbs is an array ref of symbs
2157:
2158: Returns: minimum, maximum, mean, s.d., number of students, and maximum
2159: possible of student scores on the given resources
2160:
2161: =cut
2162:
2163: ########################################################
2164: ########################################################
2165: sub score_stats {
2166: my ($Sections,$enrollment,$symbs,$starttime,$endtime,$courseid)=@_;
2167: if (! defined($courseid)) {
1.146 albertel 2168: $courseid = $env{'request.course.id'};
1.129 matthew 2169: }
2170: #
2171: &setup_table_names($courseid);
2172: my $dbh = &Apache::lonmysql::get_dbh();
2173: #
2174: my ($section_limits,$enrollment_limits)=
2175: &limit_by_section_and_status($Sections,$enrollment,'b');
2176: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
2177: my @Symbids = map { &get_symb_id($_); } @{$symbs};
2178: #
2179: my $stats_table = $courseid.'_problem_stats';
2180: my $symb_restriction = join(' OR ',map {'a.symb_id='.$_;} @Symbids);
2181: my $request = 'DROP TABLE '.$stats_table;
2182: $dbh->do($request);
2183: $request =
2184: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
2185: 'SELECT a.student_id,'.
2186: 'SUM(a.awarded*w.weight) AS score FROM '.
2187: $performance_table.' AS a '.
2188: 'NATURAL LEFT JOIN '.$weight_table.' AS w '.
2189: 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.
2190: 'WHERE ('.$symb_restriction.')';
2191: if ($time_limits) {
2192: $request .= ' AND '.$time_limits;
2193: }
2194: if ($section_limits) {
2195: $request .= ' AND '.$section_limits;
2196: }
2197: if ($enrollment_limits) {
2198: $request .= ' AND '.$enrollment_limits;
2199: }
2200: $request .= ' GROUP BY a.student_id';
2201: # &Apache::lonnet::logthis('request = '.$/.$request);
2202: my $sth = $dbh->prepare($request);
2203: $sth->execute();
2204: $request =
2205: 'SELECT AVG(score),STD(score),MAX(score),MIN(score),COUNT(score) '.
2206: 'FROM '.$stats_table;
2207: my ($ave,$std,$max,$min,$count) = &execute_SQL_request($dbh,$request);
2208: # &Apache::lonnet::logthis('request = '.$/.$request);
2209:
2210: $request = 'SELECT SUM(weight) FROM '.$weight_table.
2211: ' WHERE ('.$symb_restriction.')';
2212: my ($max_possible) = &execute_SQL_request($dbh,$request);
2213: # &Apache::lonnet::logthis('request = '.$/.$request);
2214: return($min,$max,$ave,$std,$count,$max_possible);
2215: }
2216:
2217:
2218: ########################################################
2219: ########################################################
2220:
2221: =pod
2222:
2223: =item &count_stats
2224:
2225: Inputs: $Sections, $enrollment, $symbs, $starttime,
2226: $endtime, $courseid
2227:
2228: $Sections, $enrollment, $starttime, $endtime, and $courseid are the same as
2229: elsewhere in this module.
2230: $symbs is an array ref of symbs
2231:
2232: Returns: minimum, maximum, mean, s.d., and number of students
2233: of the number of items correct on the given resources
2234:
2235: =cut
2236:
2237: ########################################################
2238: ########################################################
2239: sub count_stats {
2240: my ($Sections,$enrollment,$symbs,$starttime,$endtime,$courseid)=@_;
2241: if (! defined($courseid)) {
1.146 albertel 2242: $courseid = $env{'request.course.id'};
1.129 matthew 2243: }
2244: #
2245: &setup_table_names($courseid);
2246: my $dbh = &Apache::lonmysql::get_dbh();
2247: #
2248: my ($section_limits,$enrollment_limits)=
2249: &limit_by_section_and_status($Sections,$enrollment,'b');
2250: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
2251: my @Symbids = map { &get_symb_id($_); } @{$symbs};
2252: #
2253: my $stats_table = $courseid.'_problem_stats';
2254: my $symb_restriction = join(' OR ',map {'a.symb_id='.$_;} @Symbids);
2255: my $request = 'DROP TABLE '.$stats_table;
2256: $dbh->do($request);
2257: $request =
2258: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
2259: 'SELECT a.student_id,'.
2260: 'COUNT(a.award) AS count FROM '.
2261: $performance_table.' AS a '.
2262: 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.
2263: 'WHERE ('.$symb_restriction.')'.
2264: " AND a.award!='INCORRECT_ATTEMPTED'";
2265: if ($time_limits) {
2266: $request .= ' AND '.$time_limits;
2267: }
2268: if ($section_limits) {
2269: $request .= ' AND '.$section_limits;
2270: }
2271: if ($enrollment_limits) {
2272: $request .= ' AND '.$enrollment_limits;
2273: }
2274: $request .= ' GROUP BY a.student_id';
1.131 matthew 2275: # &Apache::lonnet::logthis('request = '.$/.$request);
1.129 matthew 2276: my $sth = $dbh->prepare($request);
2277: $sth->execute();
2278: $request =
2279: 'SELECT AVG(count),STD(count),MAX(count),MIN(count),COUNT(count) '.
2280: 'FROM '.$stats_table;
2281: my ($ave,$std,$max,$min,$count) = &execute_SQL_request($dbh,$request);
1.131 matthew 2282: # &Apache::lonnet::logthis('request = '.$/.$request);
1.129 matthew 2283: return($min,$max,$ave,$std,$count);
2284: }
1.127 matthew 2285:
2286: ######################################################
2287: ######################################################
2288:
2289: =pod
2290:
2291: =item get_student_data
2292:
2293: =cut
2294:
2295: ######################################################
2296: ######################################################
1.105 matthew 2297: sub get_student_data {
2298: my ($students,$courseid) = @_;
1.146 albertel 2299: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.105 matthew 2300: &setup_table_names($courseid);
2301: my $dbh = &Apache::lonmysql::get_dbh();
2302: return undef if (! defined($dbh));
2303: my $request = 'SELECT '.
2304: 'student_id, student '.
2305: 'FROM '.$student_table;
2306: if (defined($students)) {
2307: $request .= ' WHERE ('.
2308: join(' OR ', map {'student_id='.
2309: &get_student_id($_->{'username'},
2310: $_->{'domain'})
2311: } @$students
2312: ).')';
2313: }
2314: $request.= ' ORDER BY student_id';
2315: my $sth = $dbh->prepare($request);
2316: $sth->execute();
2317: if ($dbh->err) {
1.138 matthew 2318: &Apache::lonnet::logthis('error 2 = '.$dbh->errstr());
2319: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
1.105 matthew 2320: return undef;
2321: }
2322: my $dataset = $sth->fetchall_arrayref();
2323: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2324: return $dataset;
2325: }
2326: }
2327:
1.108 matthew 2328: sub RD_student_id { return 0; }
2329: sub RD_awarddetail { return 1; }
2330: sub RD_response_eval { return 2; }
2331: sub RD_submission { return 3; }
2332: sub RD_timestamp { return 4; }
2333: sub RD_tries { return 5; }
2334: sub RD_sname { return 6; }
2335:
2336: sub get_response_data {
1.126 matthew 2337: my ($Sections,$enrollment,$symb,$response,$courseid) = @_;
1.103 matthew 2338: return undef if (! defined($symb) ||
1.100 matthew 2339: ! defined($response));
1.146 albertel 2340: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.100 matthew 2341: #
2342: &setup_table_names($courseid);
2343: my $symb_id = &get_symb_id($symb);
1.137 matthew 2344: if (! defined($symb_id)) {
2345: &Apache::lonnet::logthis('Unable to find symb for '.$symb.' in '.$courseid);
2346: return undef;
2347: }
1.100 matthew 2348: my $response_id = &get_part_id($response);
1.137 matthew 2349: if (! defined($response_id)) {
2350: &Apache::lonnet::logthis('Unable to find id for '.$response.' in '.$courseid);
2351: return undef;
2352: }
1.100 matthew 2353: #
2354: my $dbh = &Apache::lonmysql::get_dbh();
2355: return undef if (! defined($dbh));
1.126 matthew 2356: #
1.127 matthew 2357: my ($student_requirements,$enrollment_requirements) =
2358: &limit_by_section_and_status($Sections,$enrollment,'d');
1.100 matthew 2359: my $request = 'SELECT '.
1.105 matthew 2360: 'a.student_id, a.awarddetail, a.response_specific_value, '.
1.108 matthew 2361: 'a.submission, b.timestamp, c.tries, d.student '.
1.100 matthew 2362: 'FROM '.$fulldump_response_table.' AS a '.
2363: 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2364: 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2365: 'a.transaction = b.transaction '.
2366: 'LEFT JOIN '.$fulldump_part_table.' AS c '.
2367: 'ON a.symb_id=c.symb_id AND a.student_id=c.student_id AND '.
2368: 'a.part_id=c.part_id AND a.transaction = c.transaction '.
1.108 matthew 2369: 'LEFT JOIN '.$student_table.' AS d '.
2370: 'ON a.student_id=d.student_id '.
1.100 matthew 2371: 'WHERE '.
2372: 'a.symb_id='.$symb_id.' AND a.response_id='.$response_id;
1.126 matthew 2373: if (defined($student_requirements) || defined($enrollment_requirements)) {
2374: $request .= ' AND ';
2375: if (defined($student_requirements)) {
2376: $request .= $student_requirements.' AND ';
2377: }
2378: if (defined($enrollment_requirements)) {
2379: $request .= $enrollment_requirements.' AND ';
2380: }
2381: $request =~ s/( AND )$//;
1.100 matthew 2382: }
2383: $request .= ' ORDER BY b.timestamp';
1.103 matthew 2384: # &Apache::lonnet::logthis("request =\n".$request);
1.100 matthew 2385: my $sth = $dbh->prepare($request);
2386: $sth->execute();
1.105 matthew 2387: if ($dbh->err) {
1.138 matthew 2388: &Apache::lonnet::logthis('error 3 = '.$dbh->errstr());
2389: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
1.105 matthew 2390: return undef;
2391: }
1.100 matthew 2392: my $dataset = $sth->fetchall_arrayref();
2393: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
1.117 matthew 2394: # Clear the \'s from around the submission
2395: for (my $i =0;$i<scalar(@$dataset);$i++) {
2396: $dataset->[$i]->[3] =~ s/(\'$|^\')//g;
2397: }
1.103 matthew 2398: return $dataset;
1.100 matthew 2399: }
1.118 matthew 2400: }
2401:
2402:
2403: sub RDs_awarddetail { return 3; }
2404: sub RDs_submission { return 2; }
2405: sub RDs_timestamp { return 1; }
2406: sub RDs_tries { return 0; }
1.119 matthew 2407: sub RDs_awarded { return 4; }
1.118 matthew 2408:
2409: sub get_response_data_by_student {
2410: my ($student,$symb,$response,$courseid) = @_;
2411: return undef if (! defined($symb) ||
2412: ! defined($response));
1.146 albertel 2413: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.118 matthew 2414: #
2415: &setup_table_names($courseid);
2416: my $symb_id = &get_symb_id($symb);
2417: my $response_id = &get_part_id($response);
2418: #
2419: my $student_id = &get_student_id($student->{'username'},
2420: $student->{'domain'});
2421: #
2422: my $dbh = &Apache::lonmysql::get_dbh();
2423: return undef if (! defined($dbh));
2424: my $request = 'SELECT '.
1.119 matthew 2425: 'c.tries, b.timestamp, a.submission, a.awarddetail, e.awarded '.
1.118 matthew 2426: 'FROM '.$fulldump_response_table.' AS a '.
2427: 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2428: 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2429: 'a.transaction = b.transaction '.
2430: 'LEFT JOIN '.$fulldump_part_table.' AS c '.
2431: 'ON a.symb_id=c.symb_id AND a.student_id=c.student_id AND '.
2432: 'a.part_id=c.part_id AND a.transaction = c.transaction '.
2433: 'LEFT JOIN '.$student_table.' AS d '.
2434: 'ON a.student_id=d.student_id '.
1.119 matthew 2435: 'LEFT JOIN '.$performance_table.' AS e '.
2436: 'ON a.symb_id=e.symb_id AND a.part_id=e.part_id AND '.
2437: 'a.student_id=e.student_id AND c.tries=e.tries '.
1.118 matthew 2438: 'WHERE '.
2439: 'a.symb_id='.$symb_id.' AND a.response_id='.$response_id.
2440: ' AND a.student_id='.$student_id.' ORDER BY b.timestamp';
1.125 matthew 2441: # &Apache::lonnet::logthis("request =\n".$request);
1.118 matthew 2442: my $sth = $dbh->prepare($request);
2443: $sth->execute();
2444: if ($dbh->err) {
1.138 matthew 2445: &Apache::lonnet::logthis('error 4 = '.$dbh->errstr());
2446: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
1.118 matthew 2447: return undef;
2448: }
2449: my $dataset = $sth->fetchall_arrayref();
2450: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2451: # Clear the \'s from around the submission
2452: for (my $i =0;$i<scalar(@$dataset);$i++) {
2453: $dataset->[$i]->[2] =~ s/(\'$|^\')//g;
2454: }
2455: return $dataset;
2456: }
2457: return undef; # error occurred
1.106 matthew 2458: }
1.108 matthew 2459:
2460: sub RT_student_id { return 0; }
2461: sub RT_awarded { return 1; }
2462: sub RT_tries { return 2; }
2463: sub RT_timestamp { return 3; }
1.106 matthew 2464:
2465: sub get_response_time_data {
1.142 matthew 2466: my ($sections,$enrollment,$symb,$part,$courseid) = @_;
1.106 matthew 2467: return undef if (! defined($symb) ||
1.107 matthew 2468: ! defined($part));
1.146 albertel 2469: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.106 matthew 2470: #
2471: &setup_table_names($courseid);
2472: my $symb_id = &get_symb_id($symb);
1.142 matthew 2473: if (! defined($symb_id)) {
2474: &Apache::lonnet::logthis('Unable to find symb for '.$symb.' in '.$courseid);
2475: return undef;
2476: }
1.107 matthew 2477: my $part_id = &get_part_id($part);
1.142 matthew 2478: if (! defined($part_id)) {
2479: &Apache::lonnet::logthis('Unable to find id for '.$part.' in '.$courseid);
2480: return undef;
2481: }
1.106 matthew 2482: #
2483: my $dbh = &Apache::lonmysql::get_dbh();
2484: return undef if (! defined($dbh));
1.142 matthew 2485: my ($student_requirements,$enrollment_requirements) =
2486: &limit_by_section_and_status($sections,$enrollment,'d');
1.106 matthew 2487: my $request = 'SELECT '.
1.107 matthew 2488: 'a.student_id, a.awarded, a.tries, b.timestamp '.
2489: 'FROM '.$fulldump_part_table.' AS a '.
1.142 matthew 2490: 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2491: 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2492: 'a.transaction = b.transaction '.
2493: 'LEFT JOIN '.$student_table.' as d '.
2494: 'ON a.student_id=d.student_id '.
1.106 matthew 2495: 'WHERE '.
1.107 matthew 2496: 'a.symb_id='.$symb_id.' AND a.part_id='.$part_id;
1.142 matthew 2497: if (defined($student_requirements) || defined($enrollment_requirements)) {
2498: $request .= ' AND ';
2499: if (defined($student_requirements)) {
2500: $request .= $student_requirements.' AND ';
2501: }
2502: if (defined($enrollment_requirements)) {
2503: $request .= $enrollment_requirements.' AND ';
2504: }
2505: $request =~ s/( AND )$//;
1.106 matthew 2506: }
2507: $request .= ' ORDER BY b.timestamp';
2508: # &Apache::lonnet::logthis("request =\n".$request);
2509: my $sth = $dbh->prepare($request);
2510: $sth->execute();
2511: if ($dbh->err) {
1.138 matthew 2512: &Apache::lonnet::logthis('error 5 = '.$dbh->errstr());
2513: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
1.106 matthew 2514: return undef;
2515: }
2516: my $dataset = $sth->fetchall_arrayref();
2517: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2518: return $dataset;
2519: }
2520:
1.100 matthew 2521: }
1.61 matthew 2522:
2523: ################################################
2524: ################################################
2525:
2526: =pod
2527:
1.116 matthew 2528: =item &get_student_scores($Sections,$Symbs,$enrollment,$courseid)
1.113 matthew 2529:
2530: =cut
2531:
2532: ################################################
2533: ################################################
2534: sub get_student_scores {
1.145 matthew 2535: my ($sections,$Symbs,$enrollment,$courseid,$starttime,$endtime) = @_;
1.146 albertel 2536: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.113 matthew 2537: &setup_table_names($courseid);
2538: my $dbh = &Apache::lonmysql::get_dbh();
2539: return (undef) if (! defined($dbh));
2540: my $tmptable = $courseid.'_temp_'.time;
1.145 matthew 2541: my $request = 'DROP TABLE IF EXISTS '.$tmptable;
2542: # &Apache::lonnet::logthis('request = '.$/.$request);
2543: $dbh->do($request);
1.114 matthew 2544: #
2545: my $symb_requirements;
1.113 matthew 2546: if (defined($Symbs) && @$Symbs) {
2547: $symb_requirements = '('.
1.114 matthew 2548: join(' OR ', map{ "(a.symb_id='".&get_symb_id($_->{'symb'}).
1.121 matthew 2549: "' AND a.part_id='".&get_part_id($_->{'part'}).
2550: "')"
1.113 matthew 2551: } @$Symbs).')';
2552: }
1.114 matthew 2553: #
1.145 matthew 2554: my ($student_requirements,$enrollment_requirements) =
2555: &limit_by_section_and_status($sections,$enrollment,'b');
1.114 matthew 2556: #
1.145 matthew 2557: my $time_requirements = &limit_by_start_end_time($starttime,$endtime,'a');
1.114 matthew 2558: ##
1.145 matthew 2559: $request = 'CREATE TEMPORARY TABLE IF NOT EXISTS '.$tmptable.
2560: ' SELECT a.student_id,SUM(a.awarded*c.weight) AS score FROM '.
1.114 matthew 2561: $performance_table.' AS a ';
1.145 matthew 2562: $request .= "LEFT JOIN ".$weight_table.' AS c ON a.symb_id=c.symb_id AND a.part_id=c.part_id ';
1.114 matthew 2563: if (defined($student_requirements) || defined($enrollment_requirements)) {
1.145 matthew 2564: $request .= ' LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id';
1.114 matthew 2565: }
2566: if (defined($symb_requirements) ||
2567: defined($student_requirements) ||
2568: defined($enrollment_requirements) ) {
1.113 matthew 2569: $request .= ' WHERE ';
2570: }
1.114 matthew 2571: if (defined($symb_requirements)) {
2572: $request .= $symb_requirements.' AND ';
2573: }
2574: if (defined($student_requirements)) {
2575: $request .= $student_requirements.' AND ';
2576: }
2577: if (defined($enrollment_requirements)) {
2578: $request .= $enrollment_requirements.' AND ';
2579: }
1.121 matthew 2580: if (defined($time_requirements)) {
2581: $request .= $time_requirements.' AND ';
2582: }
2583: $request =~ s/ AND $//; # Strip of the trailing ' AND '.
1.114 matthew 2584: $request .= ' GROUP BY a.student_id';
2585: # &Apache::lonnet::logthis("request = \n".$request);
1.113 matthew 2586: my $sth = $dbh->prepare($request);
2587: $sth->execute();
2588: if ($dbh->err) {
1.138 matthew 2589: &Apache::lonnet::logthis('error 6 = '.$dbh->errstr());
2590: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
1.113 matthew 2591: return undef;
2592: }
2593: $request = 'SELECT score,COUNT(*) FROM '.$tmptable.' GROUP BY score';
2594: # &Apache::lonnet::logthis("request = \n".$request);
2595: $sth = $dbh->prepare($request);
2596: $sth->execute();
2597: if ($dbh->err) {
1.138 matthew 2598: &Apache::lonnet::logthis('error 7 = '.$dbh->errstr());
2599: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
1.113 matthew 2600: return undef;
2601: }
2602: my $dataset = $sth->fetchall_arrayref();
2603: return $dataset;
2604: }
2605:
2606: ################################################
2607: ################################################
2608:
2609: =pod
2610:
1.61 matthew 2611: =item &setup_table_names()
2612:
2613: input: course id
2614:
2615: output: none
2616:
2617: Cleans up the package variables for local caching.
2618:
2619: =cut
2620:
2621: ################################################
2622: ################################################
2623: sub setup_table_names {
2624: my ($courseid) = @_;
2625: if (! defined($courseid)) {
1.146 albertel 2626: $courseid = $env{'request.course.id'};
1.61 matthew 2627: }
2628: #
2629: if (! defined($current_course) || $current_course ne $courseid) {
2630: # Clear out variables
2631: $have_read_part_table = 0;
2632: undef(%ids_by_part);
2633: undef(%parts_by_id);
2634: $have_read_symb_table = 0;
2635: undef(%ids_by_symb);
2636: undef(%symbs_by_id);
2637: $have_read_student_table = 0;
2638: undef(%ids_by_student);
2639: undef(%students_by_id);
2640: #
2641: $current_course = $courseid;
2642: }
2643: #
2644: # Set up database names
2645: my $base_id = $courseid;
2646: $symb_table = $base_id.'_'.'symb';
2647: $part_table = $base_id.'_'.'part';
2648: $student_table = $base_id.'_'.'student';
2649: $performance_table = $base_id.'_'.'performance';
2650: $parameters_table = $base_id.'_'.'parameters';
1.89 matthew 2651: $fulldump_part_table = $base_id.'_'.'partdata';
2652: $fulldump_response_table = $base_id.'_'.'responsedata';
2653: $fulldump_timestamp_table = $base_id.'_'.'timestampdata';
1.127 matthew 2654: $weight_table = $base_id.'_'.'weight';
1.89 matthew 2655: #
2656: @Tables = (
2657: $symb_table,
2658: $part_table,
2659: $student_table,
2660: $performance_table,
2661: $parameters_table,
2662: $fulldump_part_table,
2663: $fulldump_response_table,
2664: $fulldump_timestamp_table,
1.127 matthew 2665: $weight_table,
1.89 matthew 2666: );
1.61 matthew 2667: return;
1.3 stredwic 2668: }
1.1 stredwic 2669:
1.35 matthew 2670: ################################################
2671: ################################################
2672:
2673: =pod
2674:
1.57 matthew 2675: =back
2676:
2677: =item End of Local Data Caching Subroutines
2678:
2679: =cut
2680:
2681: ################################################
2682: ################################################
2683:
1.89 matthew 2684: } # End scope of table identifiers
1.57 matthew 2685:
2686: ################################################
2687: ################################################
2688:
2689: =pod
2690:
2691: =head3 Classlist Subroutines
2692:
1.35 matthew 2693: =item &get_classlist();
2694:
2695: Retrieve the classist of a given class or of the current class. Student
2696: information is returned from the classlist.db file and, if needed,
2697: from the students environment.
2698:
2699: Optional arguments are $cid, $cdom, and $cnum (course id, course domain,
2700: and course number, respectively). Any omitted arguments will be taken
1.146 albertel 2701: from the current environment ($env{'request.course.id'},
2702: $env{'course.'.$cid.'.domain'}, and $env{'course.'.$cid.'.num'}).
1.35 matthew 2703:
2704: Returns a reference to a hash which contains:
2705: keys '$sname:$sdom'
1.136 raeburn 2706: values [$sdom,$sname,$end,$start,$id,$section,$fullname,$status,$type,$lockedtype]
1.54 bowersj2 2707:
2708: The constant values CL_SDOM, CL_SNAME, CL_END, etc. can be used
2709: as indices into the returned list to future-proof clients against
2710: changes in the list order.
1.35 matthew 2711:
2712: =cut
2713:
2714: ################################################
2715: ################################################
1.54 bowersj2 2716:
2717: sub CL_SDOM { return 0; }
2718: sub CL_SNAME { return 1; }
2719: sub CL_END { return 2; }
2720: sub CL_START { return 3; }
2721: sub CL_ID { return 4; }
2722: sub CL_SECTION { return 5; }
2723: sub CL_FULLNAME { return 6; }
2724: sub CL_STATUS { return 7; }
1.111 raeburn 2725: sub CL_TYPE { return 8; }
1.136 raeburn 2726: sub CL_LOCKEDTYPE { return 9; }
1.35 matthew 2727:
2728: sub get_classlist {
2729: my ($cid,$cdom,$cnum) = @_;
1.146 albertel 2730: $cid = $cid || $env{'request.course.id'};
2731: $cdom = $cdom || $env{'course.'.$cid.'.domain'};
2732: $cnum = $cnum || $env{'course.'.$cid.'.num'};
1.57 matthew 2733: my $now = time;
1.35 matthew 2734: #
2735: my %classlist=&Apache::lonnet::dump('classlist',$cdom,$cnum);
2736: while (my ($student,$info) = each(%classlist)) {
1.60 matthew 2737: if ($student =~ /^(con_lost|error|no_such_host)/i) {
2738: &Apache::lonnet::logthis('get_classlist error for '.$cid.':'.$student);
2739: return undef;
2740: }
1.35 matthew 2741: my ($sname,$sdom) = split(/:/,$student);
2742: my @Values = split(/:/,$info);
1.136 raeburn 2743: my ($end,$start,$id,$section,$fullname,$type,$lockedtype);
1.35 matthew 2744: if (@Values > 2) {
1.136 raeburn 2745: ($end,$start,$id,$section,$fullname,$type,$lockedtype) = @Values;
1.35 matthew 2746: } else { # We have to get the data ourselves
2747: ($end,$start) = @Values;
1.37 matthew 2748: $section = &Apache::lonnet::getsection($sdom,$sname,$cid);
1.35 matthew 2749: my %info=&Apache::lonnet::get('environment',
2750: ['firstname','middlename',
2751: 'lastname','generation','id'],
2752: $sdom, $sname);
2753: my ($tmp) = keys(%info);
2754: if ($tmp =~/^(con_lost|error|no_such_host)/i) {
2755: $fullname = 'not available';
2756: $id = 'not available';
1.38 matthew 2757: &Apache::lonnet::logthis('unable to retrieve environment '.
2758: 'for '.$sname.':'.$sdom);
1.35 matthew 2759: } else {
1.141 albertel 2760: $fullname = &Apache::lonnet::format_name(@info{qw/firstname middlename lastname generation/},'lastname');
1.35 matthew 2761: $id = $info{'id'};
2762: }
1.36 matthew 2763: # Update the classlist with this students information
2764: if ($fullname ne 'not available') {
1.141 albertel 2765: my $enrolldata = join(':',$end,$start,$id,$section,$fullname);
2766: my $reply=&Apache::lonnet::cput('classlist',
1.36 matthew 2767: {$student => $enrolldata},
2768: $cdom,$cnum);
2769: if ($reply !~ /^(ok|delayed)/) {
2770: &Apache::lonnet::logthis('Unable to update classlist for '.
2771: 'student '.$sname.':'.$sdom.
2772: ' error:'.$reply);
2773: }
2774: }
1.35 matthew 2775: }
2776: my $status='Expired';
2777: if(((!$end) || $now < $end) && ((!$start) || ($now > $start))) {
2778: $status='Active';
2779: }
2780: $classlist{$student} =
1.136 raeburn 2781: [$sdom,$sname,$end,$start,$id,$section,$fullname,$status,$type,$lockedtype];
1.35 matthew 2782: }
2783: if (wantarray()) {
2784: return (\%classlist,['domain','username','end','start','id',
1.136 raeburn 2785: 'section','fullname','status','type','lockedtype']);
1.35 matthew 2786: } else {
2787: return \%classlist;
2788: }
2789: }
2790:
1.1 stredwic 2791: # ----- END HELPER FUNCTIONS --------------------------------------------
2792:
2793: 1;
2794: __END__
1.36 matthew 2795:
1.35 matthew 2796:
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