Annotation of loncom/interface/loncoursedata.pm, revision 1.210
1.1 stredwic 1: # The LearningOnline Network with CAPA
2: #
1.210 ! raeburn 3: # $Id: loncoursedata.pm,v 1.209 2023/11/04 00:06:00 raeburn 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: =pod
29:
30: =head1 NAME
31:
1.189 jms 32: Apache::loncoursedata
1.1 stredwic 33:
34: =head1 SYNOPSIS
35:
1.22 stredwic 36: Set of functions that download and process student and course information.
1.1 stredwic 37:
38: =head1 PACKAGES USED
39:
1.181 albertel 40: Apache::lonnet
41: Apache::longroup
42: Time::HiRes
43: Apache::lonmysql
44: LONCAPA
45: Digest::MD5
1.190 jms 46:
1.1 stredwic 47: =cut
48:
49: package Apache::loncoursedata;
50:
51: use strict;
1.146 albertel 52: use Apache::lonnet;
1.181 albertel 53: use Apache::longroup();
54: use Time::HiRes();
55: use Apache::lonmysql();
1.173 www 56: use LONCAPA;
1.181 albertel 57: use Digest::MD5();
1.1 stredwic 58:
1.191 foxr 59: =pod
60:
1.193 raeburn 61: =head2 make_into_hash
1.191 foxr 62:
63: Turn a colon separated string into a hash and return a reference
64: to it. Numbering from 0 even elements are keys and odd elements
65: are values e.g. a:b:c:d creates a hash like
66: a => b, c =>d
67:
68: =cut
69:
1.47 matthew 70: sub make_into_hash {
71: my $values = shift;
1.173 www 72: my %tmp = map { &unescape($_); } split(':',$values);
1.47 matthew 73: return \%tmp;
74: }
75:
76:
1.89 matthew 77: { # Begin scope of table identifiers
1.57 matthew 78:
79: my $current_course ='';
80: my $symb_table;
81: my $part_table;
82: my $student_table;
1.167 raeburn 83: my $groupnames_table;
84: my $students_groups_table;
1.57 matthew 85: my $performance_table;
86: my $parameters_table;
1.89 matthew 87: my $fulldump_response_table;
88: my $fulldump_part_table;
89: my $fulldump_timestamp_table;
1.127 matthew 90: my $weight_table;
1.57 matthew 91:
1.89 matthew 92: my @Tables;
1.57 matthew 93:
94:
95:
96: sub init_dbs {
1.134 matthew 97: my ($courseid,$drop) = @_;
1.57 matthew 98: &setup_table_names($courseid);
99: #
1.73 matthew 100: # Drop any of the existing tables
1.134 matthew 101: if ($drop) {
102: foreach my $table (@Tables) {
103: &Apache::lonmysql::drop_table($table);
104: }
1.73 matthew 105: }
106: #
1.57 matthew 107: # Note - changes to this table must be reflected in the code that
108: # stores the data (calls &Apache::lonmysql::store_row with this table
109: # id
110: my $symb_table_def = {
111: id => $symb_table,
112: permanent => 'no',
113: columns => [{ name => 'symb_id',
114: type => 'MEDIUMINT UNSIGNED',
115: restrictions => 'NOT NULL',
116: auto_inc => 'yes', },
117: { name => 'symb',
118: type => 'MEDIUMTEXT',
119: restrictions => 'NOT NULL'},
120: ],
121: 'PRIMARY KEY' => ['symb_id'],
122: };
123: #
124: my $part_table_def = {
125: id => $part_table,
126: permanent => 'no',
127: columns => [{ name => 'part_id',
128: type => 'MEDIUMINT UNSIGNED',
129: restrictions => 'NOT NULL',
130: auto_inc => 'yes', },
131: { name => 'part',
1.132 matthew 132: type => 'VARCHAR(100) BINARY',
1.57 matthew 133: restrictions => 'NOT NULL'},
134: ],
135: 'PRIMARY KEY' => ['part (100)'],
136: 'KEY' => [{ columns => ['part_id']},],
137: };
138: #
139: my $student_table_def = {
140: id => $student_table,
141: permanent => 'no',
142: columns => [{ name => 'student_id',
143: type => 'MEDIUMINT UNSIGNED',
144: restrictions => 'NOT NULL',
145: auto_inc => 'yes', },
146: { name => 'student',
1.132 matthew 147: type => 'VARCHAR(100) BINARY',
1.113 matthew 148: restrictions => 'NOT NULL UNIQUE'},
149: { name => 'section',
1.132 matthew 150: type => 'VARCHAR(100) BINARY',
1.113 matthew 151: restrictions => 'NOT NULL'},
1.178 albertel 152: { name => 'start',
153: type => 'INT',
154: restrictions => 'NOT NULL'},
155: { name => 'end',
156: type => 'INT',
1.57 matthew 157: restrictions => 'NOT NULL'},
1.85 matthew 158: { name => 'classification',
1.132 matthew 159: type => 'VARCHAR(100) BINARY', },
1.57 matthew 160: { name => 'updatetime',
1.89 matthew 161: type => 'INT UNSIGNED'},
162: { name => 'fullupdatetime',
163: type => 'INT UNSIGNED'},
1.57 matthew 164: ],
1.87 matthew 165: 'PRIMARY KEY' => ['student_id'],
1.113 matthew 166: 'KEY' => [{ columns => ['student (100)',
167: 'section (100)',
1.178 albertel 168: 'start',
169: 'end']},],
1.57 matthew 170: };
171: #
1.167 raeburn 172: my $groupnames_table_def = {
173: id => $groupnames_table,
174: permanent => 'no',
175: columns => [{ name => 'group_id',
176: type => 'MEDIUMINT UNSIGNED',
177: restrictions => 'NOT NULL',
178: auto_inc => 'yes', },
179: { name => 'groupname',
180: type => 'VARCHAR(100) BINARY',
181: restrictions => 'NOT NULL UNIQUE'},
182: ],
183: 'PRIMARY KEY' => ['group_id'],
184: 'KEY' => [{ columns => ['groupname (100)',]},],
185: };
186: #
187: my $students_groups_table_def = {
188: id => $students_groups_table,
189: permanent => 'no',
190: columns => [{ name => 'student_id',
191: type => 'MEDIUMINT UNSIGNED',
192: restrictions => 'NOT NULL', },
193: { name => 'group_id',
194: type => 'MEDIUMINT UNSIGNED',
195: restrictions => 'NOT NULL', },
196: ],
197: 'PRIMARY KEY' => ['student_id','group_id'],
198: 'KEY' => [{ columns => ['student_id'] },
199: { columns => ['group_id'] },],
200: };
201: #
1.57 matthew 202: my $performance_table_def = {
203: id => $performance_table,
204: permanent => 'no',
205: columns => [{ name => 'symb_id',
206: type => 'MEDIUMINT UNSIGNED',
207: restrictions => 'NOT NULL' },
208: { name => 'student_id',
209: type => 'MEDIUMINT UNSIGNED',
210: restrictions => 'NOT NULL' },
211: { name => 'part_id',
212: type => 'MEDIUMINT UNSIGNED',
213: restrictions => 'NOT NULL' },
1.73 matthew 214: { name => 'part',
1.132 matthew 215: type => 'VARCHAR(100) BINARY',
1.73 matthew 216: restrictions => 'NOT NULL'},
1.57 matthew 217: { name => 'solved',
218: type => 'TINYTEXT' },
219: { name => 'tries',
220: type => 'SMALLINT UNSIGNED' },
221: { name => 'awarded',
1.127 matthew 222: type => 'REAL' },
1.210 ! raeburn 223: { name => 'latefrac',
! 224: type => 'REAL' },
1.57 matthew 225: { name => 'award',
226: type => 'TINYTEXT' },
227: { name => 'awarddetail',
228: type => 'TINYTEXT' },
229: { name => 'timestamp',
230: type => 'INT UNSIGNED'},
231: ],
232: 'PRIMARY KEY' => ['symb_id','student_id','part_id'],
233: 'KEY' => [{ columns=>['student_id'] },
234: { columns=>['symb_id'] },],
235: };
236: #
1.89 matthew 237: my $fulldump_part_table_def = {
238: id => $fulldump_part_table,
239: permanent => 'no',
240: columns => [
241: { name => 'symb_id',
242: type => 'MEDIUMINT UNSIGNED',
243: restrictions => 'NOT NULL' },
244: { name => 'part_id',
245: type => 'MEDIUMINT UNSIGNED',
246: restrictions => 'NOT NULL' },
247: { name => 'student_id',
248: type => 'MEDIUMINT UNSIGNED',
249: restrictions => 'NOT NULL' },
250: { name => 'transaction',
251: type => 'MEDIUMINT UNSIGNED',
252: restrictions => 'NOT NULL' },
253: { name => 'tries',
254: type => 'SMALLINT UNSIGNED',
255: restrictions => 'NOT NULL' },
256: { name => 'award',
257: type => 'TINYTEXT' },
258: { name => 'awarded',
1.127 matthew 259: type => 'REAL' },
1.89 matthew 260: { name => 'previous',
261: type => 'SMALLINT UNSIGNED' },
1.210 ! raeburn 262: { name => 'latefrac',
! 263: type => 'REAL' },
1.89 matthew 264: # { name => 'regrader',
265: # type => 'TINYTEXT' },
266: # { name => 'afterduedate',
267: # type => 'TINYTEXT' },
268: ],
269: 'PRIMARY KEY' => ['symb_id','part_id','student_id','transaction'],
270: 'KEY' => [
271: { columns=>['symb_id'] },
272: { columns=>['part_id'] },
273: { columns=>['student_id'] },
274: ],
275: };
276: #
277: my $fulldump_response_table_def = {
278: id => $fulldump_response_table,
279: permanent => 'no',
280: columns => [
281: { name => 'symb_id',
282: type => 'MEDIUMINT UNSIGNED',
283: restrictions => 'NOT NULL' },
284: { name => 'part_id',
285: type => 'MEDIUMINT UNSIGNED',
286: restrictions => 'NOT NULL' },
287: { name => 'response_id',
288: type => 'MEDIUMINT UNSIGNED',
289: restrictions => 'NOT NULL' },
290: { name => 'student_id',
291: type => 'MEDIUMINT UNSIGNED',
292: restrictions => 'NOT NULL' },
293: { name => 'transaction',
294: type => 'MEDIUMINT UNSIGNED',
295: restrictions => 'NOT NULL' },
296: { name => 'awarddetail',
297: type => 'TINYTEXT' },
298: # { name => 'message',
1.132 matthew 299: # type => 'CHAR BINARY'},
1.89 matthew 300: { name => 'response_specific',
301: type => 'TINYTEXT' },
302: { name => 'response_specific_value',
303: type => 'TINYTEXT' },
1.159 albertel 304: { name => 'response_specific_2',
305: type => 'TINYTEXT' },
306: { name => 'response_specific_value_2',
307: type => 'TINYTEXT' },
1.89 matthew 308: { name => 'submission',
309: type => 'TEXT'},
310: ],
311: 'PRIMARY KEY' => ['symb_id','part_id','response_id','student_id',
312: 'transaction'],
313: 'KEY' => [
314: { columns=>['symb_id'] },
315: { columns=>['part_id','response_id'] },
316: { columns=>['student_id'] },
317: ],
318: };
319: my $fulldump_timestamp_table_def = {
320: id => $fulldump_timestamp_table,
321: permanent => 'no',
322: columns => [
323: { name => 'symb_id',
324: type => 'MEDIUMINT UNSIGNED',
325: restrictions => 'NOT NULL' },
326: { name => 'student_id',
327: type => 'MEDIUMINT UNSIGNED',
328: restrictions => 'NOT NULL' },
329: { name => 'transaction',
330: type => 'MEDIUMINT UNSIGNED',
331: restrictions => 'NOT NULL' },
332: { name => 'timestamp',
333: type => 'INT UNSIGNED'},
334: ],
335: 'PRIMARY KEY' => ['symb_id','student_id','transaction'],
336: 'KEY' => [
337: { columns=>['symb_id'] },
338: { columns=>['student_id'] },
339: { columns=>['transaction'] },
340: ],
341: };
342: #
1.57 matthew 343: my $parameters_table_def = {
344: id => $parameters_table,
345: permanent => 'no',
346: columns => [{ name => 'symb_id',
347: type => 'MEDIUMINT UNSIGNED',
348: restrictions => 'NOT NULL' },
349: { name => 'student_id',
350: type => 'MEDIUMINT UNSIGNED',
351: restrictions => 'NOT NULL' },
352: { name => 'parameter',
353: type => 'TINYTEXT',
354: restrictions => 'NOT NULL' },
355: { name => 'value',
356: type => 'MEDIUMTEXT' },
357: ],
358: 'PRIMARY KEY' => ['symb_id','student_id','parameter (255)'],
359: };
360: #
1.127 matthew 361: my $weight_table_def = {
362: id => $weight_table,
363: permanent => 'no',
364: columns => [{ name => 'symb_id',
365: type => 'MEDIUMINT UNSIGNED',
366: restrictions => 'NOT NULL' },
367: { name => 'part_id',
368: type => 'MEDIUMINT UNSIGNED',
369: restrictions => 'NOT NULL' },
370: { name => 'weight',
371: type => 'REAL',
372: restrictions => 'NOT NULL' },
373: ],
374: 'PRIMARY KEY' => ['symb_id','part_id'],
375: };
376: #
1.57 matthew 377: # Create the tables
378: my $tableid;
379: $tableid = &Apache::lonmysql::create_table($symb_table_def);
380: if (! defined($tableid)) {
381: &Apache::lonnet::logthis("error creating symb_table: ".
382: &Apache::lonmysql::get_error());
383: return 1;
384: }
385: #
386: $tableid = &Apache::lonmysql::create_table($part_table_def);
387: if (! defined($tableid)) {
388: &Apache::lonnet::logthis("error creating part_table: ".
389: &Apache::lonmysql::get_error());
390: return 2;
391: }
392: #
393: $tableid = &Apache::lonmysql::create_table($student_table_def);
394: if (! defined($tableid)) {
395: &Apache::lonnet::logthis("error creating student_table: ".
396: &Apache::lonmysql::get_error());
397: return 3;
398: }
399: #
400: $tableid = &Apache::lonmysql::create_table($performance_table_def);
401: if (! defined($tableid)) {
402: &Apache::lonnet::logthis("error creating preformance_table: ".
403: &Apache::lonmysql::get_error());
404: return 5;
405: }
406: #
407: $tableid = &Apache::lonmysql::create_table($parameters_table_def);
408: if (! defined($tableid)) {
409: &Apache::lonnet::logthis("error creating parameters_table: ".
410: &Apache::lonmysql::get_error());
411: return 6;
412: }
1.89 matthew 413: #
414: $tableid = &Apache::lonmysql::create_table($fulldump_part_table_def);
415: if (! defined($tableid)) {
416: &Apache::lonnet::logthis("error creating fulldump_part_table: ".
417: &Apache::lonmysql::get_error());
418: return 7;
419: }
420: #
421: $tableid = &Apache::lonmysql::create_table($fulldump_response_table_def);
422: if (! defined($tableid)) {
423: &Apache::lonnet::logthis("error creating fulldump_response_table: ".
424: &Apache::lonmysql::get_error());
425: return 8;
426: }
427: $tableid = &Apache::lonmysql::create_table($fulldump_timestamp_table_def);
428: if (! defined($tableid)) {
429: &Apache::lonnet::logthis("error creating fulldump_timestamp_table: ".
430: &Apache::lonmysql::get_error());
431: return 9;
432: }
1.127 matthew 433: $tableid = &Apache::lonmysql::create_table($weight_table_def);
434: if (! defined($tableid)) {
435: &Apache::lonnet::logthis("error creating weight_table: ".
436: &Apache::lonmysql::get_error());
437: return 10;
438: }
1.167 raeburn 439: $tableid = &Apache::lonmysql::create_table($groupnames_table_def);
440: if (! defined($tableid)) {
441: &Apache::lonnet::logthis("error creating groupnames_table: ".
442: &Apache::lonmysql::get_error());
443: return 11;
444: }
445: $tableid = &Apache::lonmysql::create_table($students_groups_table_def);
446: if (! defined($tableid)) {
447: &Apache::lonnet::logthis("error creating student_groups_table: ".
448: &Apache::lonmysql::get_error());
449: return 12;
450: }
1.57 matthew 451: return 0;
1.70 matthew 452: }
453:
1.191 foxr 454: =pod
455:
456: =head2 delete_caches
1.70 matthew 457:
1.191 foxr 458: Drops all of the tables in the local mysql cache associated with the
459: specified course id.
1.70 matthew 460:
1.192 raeburn 461: TODO: The drops should be pushed into lonmysql to further isolate
1.191 foxr 462: mysql code from other modules.
463:
464: =cut
1.70 matthew 465: sub delete_caches {
466: my $courseid = shift;
1.146 albertel 467: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.70 matthew 468: #
469: &setup_table_names($courseid);
470: #
471: my $dbh = &Apache::lonmysql::get_dbh();
1.89 matthew 472: foreach my $table (@Tables) {
1.70 matthew 473: my $command = 'DROP TABLE '.$table.';';
474: $dbh->do($command);
475: if ($dbh->err) {
476: &Apache::lonnet::logthis($command.' resulted in error: '.$dbh->errstr);
477: }
478: }
479: return;
1.57 matthew 480: }
481:
482:
1.61 matthew 483: my $have_read_part_table = 0;
1.57 matthew 484: my %ids_by_part;
485: my %parts_by_id;
486:
487: sub get_part_id {
488: my ($part) = @_;
1.61 matthew 489: $part = 0 if (! defined($part));
490: if (! $have_read_part_table) {
491: my @Result = &Apache::lonmysql::get_rows($part_table);
492: foreach (@Result) {
493: $ids_by_part{$_->[1]}=$_->[0];
494: }
495: $have_read_part_table = 1;
496: }
1.57 matthew 497: if (! exists($ids_by_part{$part})) {
498: &Apache::lonmysql::store_row($part_table,[undef,$part]);
499: undef(%ids_by_part);
500: my @Result = &Apache::lonmysql::get_rows($part_table);
501: foreach (@Result) {
502: $ids_by_part{$_->[1]}=$_->[0];
503: }
504: }
505: return $ids_by_part{$part} if (exists($ids_by_part{$part}));
506: return undef; # error
507: }
508:
509: sub get_part {
510: my ($part_id) = @_;
511: if (! exists($parts_by_id{$part_id}) ||
512: ! defined($parts_by_id{$part_id}) ||
513: $parts_by_id{$part_id} eq '') {
514: my @Result = &Apache::lonmysql::get_rows($part_table);
515: foreach (@Result) {
516: $parts_by_id{$_->[0]}=$_->[1];
517: }
518: }
519: return $parts_by_id{$part_id} if(exists($parts_by_id{$part_id}));
520: return undef; # error
521: }
522:
523:
1.61 matthew 524: my $have_read_symb_table = 0;
1.57 matthew 525: my %ids_by_symb;
526: my %symbs_by_id;
527:
528: sub get_symb_id {
529: my ($symb) = @_;
1.61 matthew 530: if (! $have_read_symb_table) {
531: my @Result = &Apache::lonmysql::get_rows($symb_table);
532: foreach (@Result) {
533: $ids_by_symb{$_->[1]}=$_->[0];
534: }
535: $have_read_symb_table = 1;
536: }
1.57 matthew 537: if (! exists($ids_by_symb{$symb})) {
538: &Apache::lonmysql::store_row($symb_table,[undef,$symb]);
539: undef(%ids_by_symb);
540: my @Result = &Apache::lonmysql::get_rows($symb_table);
541: foreach (@Result) {
542: $ids_by_symb{$_->[1]}=$_->[0];
543: }
544: }
545: return $ids_by_symb{$symb} if(exists( $ids_by_symb{$symb}));
546: return undef; # error
547: }
548:
549: sub get_symb {
550: my ($symb_id) = @_;
551: if (! exists($symbs_by_id{$symb_id}) ||
552: ! defined($symbs_by_id{$symb_id}) ||
553: $symbs_by_id{$symb_id} eq '') {
554: my @Result = &Apache::lonmysql::get_rows($symb_table);
555: foreach (@Result) {
556: $symbs_by_id{$_->[0]}=$_->[1];
557: }
558: }
559: return $symbs_by_id{$symb_id} if(exists( $symbs_by_id{$symb_id}));
560: return undef; # error
561: }
562:
1.190 jms 563: my $have_read_student_table = 0;
564: my %ids_by_student;
565: my %students_by_id;
1.57 matthew 566:
1.190 jms 567: sub get_student_id {
568: my ($sname,$sdom) = @_;
569: my $student = $sname.':'.$sdom;
570: if (! $have_read_student_table) {
571: my @Result = &Apache::lonmysql::get_rows($student_table);
572: foreach (@Result) {
573: $ids_by_student{$_->[1]}=$_->[0];
574: }
575: $have_read_student_table = 1;
576: }
577: if (! exists($ids_by_student{$student})) {
578: &populate_student_table();
579: undef(%ids_by_student);
580: undef(%students_by_id);
581: my @Result = &Apache::lonmysql::get_rows($student_table);
1.57 matthew 582: foreach (@Result) {
583: $ids_by_student{$_->[1]}=$_->[0];
584: }
585: }
586: return $ids_by_student{$student} if(exists( $ids_by_student{$student}));
587: return undef; # error
588: }
589:
590: sub get_student {
591: my ($student_id) = @_;
592: if (! exists($students_by_id{$student_id}) ||
593: ! defined($students_by_id{$student_id}) ||
594: $students_by_id{$student_id} eq '') {
595: my @Result = &Apache::lonmysql::get_rows($student_table);
596: foreach (@Result) {
597: $students_by_id{$_->[0]}=$_->[1];
598: }
599: }
600: return $students_by_id{$student_id} if(exists($students_by_id{$student_id}));
601: return undef; # error
602: }
1.99 matthew 603:
1.113 matthew 604: sub populate_student_table {
605: my ($courseid) = @_;
606: if (! defined($courseid)) {
1.146 albertel 607: $courseid = $env{'request.course.id'};
1.113 matthew 608: }
609: #
610: &setup_table_names($courseid);
1.134 matthew 611: &init_dbs($courseid,0);
1.113 matthew 612: my $dbh = &Apache::lonmysql::get_dbh();
613: my $request = 'INSERT IGNORE INTO '.$student_table.
1.178 albertel 614: "(student,section,start,end) VALUES ";
1.150 albertel 615: my $cdom = $env{'course.'.$courseid.'.domain'};
616: my $cnum = $env{'course.'.$courseid.'.num'};
617: my $classlist = &get_classlist($cdom,$cnum);
1.113 matthew 618: my $student_count=0;
619: while (my ($student,$data) = each %$classlist) {
1.178 albertel 620: my ($section,$start,$end) = ($data->[&CL_SECTION()],
621: $data->[&CL_START()],
622: $data->[&CL_END()]);
1.113 matthew 623: if ($section eq '' || $section =~ /^\s*$/) {
624: $section = 'none';
625: }
1.178 albertel 626: if (!defined($start)) { $start = 0; }
627: if (!defined($end)) { $end = 0; }
628: $request .= "('".$student."','".$section."','".$start."','".$end."'),";
1.113 matthew 629: $student_count++;
630: }
631: return if ($student_count == 0);
632: chop($request);
633: $dbh->do($request);
634: if ($dbh->err()) {
635: &Apache::lonnet::logthis("error ".$dbh->errstr().
1.188 bisitz 636: " occurred executing \n".
1.113 matthew 637: $request);
638: }
639: return;
640: }
641:
1.167 raeburn 642: my $have_read_groupnames_table = 0;
643: my %ids_by_groupname;
644:
645: sub get_group_id {
646: my ($groupname) = @_;
647: if (! $have_read_groupnames_table) {
648: my @Result = &Apache::lonmysql::get_rows($groupnames_table);
649: foreach (@Result) {
650: $ids_by_groupname{$_->[1]}=$_->[0];
651: }
652: $have_read_groupnames_table = 1;
653: }
654: if (! exists($ids_by_groupname{$groupname})) {
655: &populate_groupnames_table();
656: undef(%ids_by_groupname);
657: my @Result = &Apache::lonmysql::get_rows($groupnames_table);
658: foreach (@Result) {
659: $ids_by_groupname{$_->[1]}=$_->[0];
660: }
661: }
662: if (exists($ids_by_groupname{$groupname})) {
663: return $ids_by_groupname{$groupname};
664: }
665: return undef; # error
666: }
667:
668: sub populate_groupnames_table {
669: my ($courseid) = @_;
670: if (! defined($courseid)) {
671: $courseid = $env{'request.course.id'};
672: }
673: &setup_table_names($courseid);
674: &init_dbs($courseid,0);
675: my $dbh = &Apache::lonmysql::get_dbh();
676: my $cdom = $env{'course.'.$courseid.'.domain'};
677: my $cnum = $env{'course.'.$courseid.'.num'};
1.171 raeburn 678: my %curr_groups = &Apache::longroup::coursegroups($cdom,$cnum);
1.169 albertel 679: return if (!%curr_groups);
1.167 raeburn 680: my $request = 'INSERT IGNORE INTO '.$groupnames_table.
681: '(groupname) VALUES ';
682: foreach my $groupname (sort(keys(%curr_groups)),'none') {
683: $request .= "('".$groupname."'),";
684: }
685: chop($request);
686: $dbh->do($request);
687: if ($dbh->err()) {
688: &Apache::lonnet::logthis("error ".$dbh->errstr().
1.188 bisitz 689: " occurred executing \n".
1.167 raeburn 690: $request);
691: }
692: return;
693: }
694:
695: my $have_read_studentsgroups_table = 0;
696: my %groupids_by_studentid;
697:
698: sub get_students_groupids {
699: my ($student_id) = @_;
700: if (! $have_read_studentsgroups_table) {
701: my @Result = &Apache::lonmysql::get_rows($students_groups_table);
702: foreach (@Result) {
703: push(@{$groupids_by_studentid{$_->[0]}},$_->[1]);
704: }
705: $have_read_studentsgroups_table = 1;
706: }
707: if (! exists($groupids_by_studentid{$student_id})) {
708: &populate_students_groups_table();
709: undef(%groupids_by_studentid);
710: my @Result = &Apache::lonmysql::get_rows($students_groups_table);
711: foreach (@Result) {
712: push(@{$groupids_by_studentid{$_->[0]}},$_->[1]);
713: }
714: }
715: if (exists($groupids_by_studentid{$student_id})) {
716: if (ref($groupids_by_studentid{$student_id}) eq 'ARRAY') {
717: return @{$groupids_by_studentid{$student_id}};
718: }
719: }
720: return undef; # error
721: }
722:
723:
724: sub populate_students_groups_table {
725: my ($courseid) = @_;
726: if (! defined($courseid)) {
727: $courseid = $env{'request.course.id'};
728: }
729: #
730: &setup_table_names($courseid);
731: &init_dbs($courseid,0);
732: my $dbh = &Apache::lonmysql::get_dbh();
733: my $request = 'INSERT IGNORE INTO '.$students_groups_table.
734: "(student_id,group_id) VALUES ";
735: my $cdom = $env{'course.'.$courseid.'.domain'};
736: my $cnum = $env{'course.'.$courseid.'.num'};
1.170 raeburn 737: my ($classlist,$keylist) = &get_classlist($cdom,$cnum);
1.167 raeburn 738: my ($classgroups,$studentgroups) = &get_group_memberships($classlist,
1.170 raeburn 739: $keylist,
1.167 raeburn 740: $cdom,$cnum);
741: my $record_count = 0;
742: foreach my $student (sort(keys(%{$classgroups}))) {
743: my $student_id = &get_student_id(split(':',$student));
744: my @studentsgroups = &get_students_groups($student,'Active',$classgroups);
745: if (@studentsgroups < 1) {
746: @studentsgroups = ('none');
747: }
748: foreach my $groupname (@studentsgroups) {
749: my $group_id = &get_group_id($groupname);
750: $request .= "('".$student_id."','".$group_id."'),";
751: $record_count++;
752: }
753: }
754: return if ($record_count == 0);
755: chop($request);
756: $dbh->do($request);
757: if ($dbh->err()) {
758: &Apache::lonnet::logthis("error ".$dbh->errstr().
1.188 bisitz 759: " occurred executing \n".
1.167 raeburn 760: $request);
761: }
762: return;
763: }
764:
1.99 matthew 765: sub clear_internal_caches {
766: $have_read_part_table = 0;
767: undef(%ids_by_part);
768: undef(%parts_by_id);
769: $have_read_symb_table = 0;
770: undef(%ids_by_symb);
771: undef(%symbs_by_id);
772: $have_read_student_table = 0;
773: undef(%ids_by_student);
774: undef(%students_by_id);
1.167 raeburn 775: $have_read_groupnames_table = 0;
776: undef(%ids_by_groupname);
1.99 matthew 777: }
778:
1.164 albertel 779: sub symb_is_for_task {
780: my ($symb) = @_;
781: return ($symb =~ /\.task$/);
782: }
783:
1.207 raeburn 784: my $requested_max_packet = 0;
785: my $max_allowed_packet;
1.89 matthew 786:
787: sub update_full_student_data {
788: my ($sname,$sdom,$courseid) = @_;
789: #
790: # Set up database names
791: &setup_table_names($courseid);
792: #
793: my $student_id = &get_student_id($sname,$sdom);
794: my $student = $sname.':'.$sdom;
795: #
796: my $returnstatus = 'okay';
797: #
798: # Download students data
799: my $time_of_retrieval = time;
1.157 albertel 800: my @tmp = &Apache::lonnet::dumpstore($courseid,$sdom,$sname);
1.89 matthew 801: if (@tmp && $tmp[0] =~ /^error/) {
802: $returnstatus = 'error retrieving full student data';
803: return $returnstatus;
804: } elsif (! @tmp) {
805: $returnstatus = 'okay: no student data';
806: return $returnstatus;
807: }
808: my %studentdata = @tmp;
809: #
810: # Get database handle and clean out the tables
811: my $dbh = &Apache::lonmysql::get_dbh();
812: $dbh->do('DELETE FROM '.$fulldump_response_table.' WHERE student_id='.
813: $student_id);
814: $dbh->do('DELETE FROM '.$fulldump_part_table.' WHERE student_id='.
815: $student_id);
816: $dbh->do('DELETE FROM '.$fulldump_timestamp_table.' WHERE student_id='.
817: $student_id);
818: #
819: # Parse and store the data into a form we can handle
820: my $partdata;
821: my $respdata;
822: while (my ($key,$value) = each(%studentdata)) {
823: next if ($key =~ /^(\d+):(resource$|subnum$|keys:)/);
824: my ($transaction,$symb,$parameter) = split(':',$key);
1.179 albertel 825: $symb = &unescape($symb);
826: $parameter = &unescape($parameter);
1.89 matthew 827: my $symb_id = &get_symb_id($symb);
828: if ($parameter eq 'timestamp') {
829: # We can deal with 'timestamp' right away
830: my @timestamp_storage = ($symb_id,$student_id,
831: $transaction,$value);
1.98 matthew 832: my $store_command = 'INSERT IGNORE INTO '.$fulldump_timestamp_table.
1.89 matthew 833: " VALUES ('".join("','",@timestamp_storage)."');";
834: $dbh->do($store_command);
835: if ($dbh->err()) {
836: &Apache::lonnet::logthis('unable to execute '.$store_command);
837: &Apache::lonnet::logthis($dbh->errstr());
838: }
839: next;
840: } elsif ($parameter eq 'version') {
841: next;
1.165 albertel 842: } elsif (&symb_is_for_task($symb)) {
843: next if ($parameter !~ /^resource\.(.*)\.(award|
844: awarded|
845: solved|
846: submission|
847: portfiles|
848: status|
849: version|
850: regrader)\s*$/x);
851: my ($version_and_part_id, $field) = ($1,$2);
852:
853: next if ($version_and_part_id !~ /\./
854: && $field ne 'regrader' && $field ne 'version');
855:
856: my ($version, $part, $instance) =
857: split(/\./,$version_and_part_id);
858:
859: #skip and instance dimension or criteria specific data
860: next if (defined($instance)
861: && $instance ne $field
862: && $instance ne 'bridgetask');
863:
864: if (!defined($part)) {
865: $part = $version;
866: }
867: my $resp_id = &get_part_id('0');
868: my $part_id = &get_part_id($part);
869:
870: if ($field eq 'version') {
871: # for tasks each version is an attempt at it thus
872: # version -> tries
873: $partdata->{$symb_id}{$part_id}{$transaction}{'tries'}=
874: $value;
875: # at new version time the record gets reset thus adding a
876: # virtual response awarddetail of 'new_version'
877: $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific'}='status';
878: $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific_value'}='new_version';
879:
880: } elsif ($field eq 'award' || $field eq 'awarded'
881: || $field eq 'solved') {
882: $partdata->{$symb_id}{$part_id}{$transaction}{$field}=
883: $value;
884: } elsif ($field eq 'portfiles') {
885: # tasks only accepts portfolio submissions
886: $value = $dbh->quote($value);
887: $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'submission'}=$value;
888: } elsif ($field eq 'status') {
889: $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific'}=$field;
890: $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific_value'}=$value;
891: } elsif ($field eq 'regrader') {
892: $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific_2'}=$field;
893: $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific_value_2'}=$value;
894: }
895: } elsif ($parameter =~ /^resource\.(.*)\.(tries|
1.90 matthew 896: award|
897: awarded|
898: previous|
899: solved|
900: awarddetail|
901: submission|
902: submissiongrading|
903: molecule)\s*$/x){
1.89 matthew 904: # we do not have enough information to store an
905: # entire row, so we save it up until later.
906: my ($part_and_resp_id,$field) = ($1,$2);
907: my ($part,$part_id,$resp,$resp_id);
908: if ($part_and_resp_id =~ /\./) {
909: ($part,$resp) = split(/\./,$part_and_resp_id);
910: $part_id = &get_part_id($part);
911: $resp_id = &get_part_id($resp);
912: } else {
913: $part_id = &get_part_id($part_and_resp_id);
914: }
1.90 matthew 915: # Deal with part specific data
1.89 matthew 916: if ($field =~ /^(tries|award|awarded|previous)$/) {
917: $partdata->{$symb_id}->{$part_id}->{$transaction}->{$field}=$value;
918: }
1.90 matthew 919: # deal with response specific data
1.89 matthew 920: if (defined($resp_id) &&
1.100 matthew 921: $field =~ /^(awarddetail|
1.90 matthew 922: submission|
923: submissiongrading|
924: molecule)$/x) {
1.89 matthew 925: if ($field eq 'submission') {
926: # We have to be careful with user supplied input.
927: # most of the time we are okay because it is escaped.
928: # However, there is one wrinkle: submissions which end in
929: # and odd number of '\' cause insert errors to occur.
930: # Best trap this somehow...
1.116 matthew 931: $value = $dbh->quote($value);
1.89 matthew 932: }
1.90 matthew 933: if ($field eq 'submissiongrading' ||
934: $field eq 'molecule') {
935: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific'}=$field;
936: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific_value'}=$value;
937: } else {
938: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{$field}=$value;
939: }
1.89 matthew 940: }
941: }
942: }
943: ##
944: ## Store the part data
1.98 matthew 945: my $store_command = 'INSERT IGNORE INTO '.$fulldump_part_table.
1.89 matthew 946: ' VALUES '."\n";
947: my $store_rows = 0;
948: while (my ($symb_id,$hash1) = each (%$partdata)) {
949: while (my ($part_id,$hash2) = each (%$hash1)) {
950: while (my ($transaction,$data) = each (%$hash2)) {
951: $store_command .= "('".join("','",$symb_id,$part_id,
952: $student_id,
953: $transaction,
1.101 matthew 954: $data->{'tries'},
1.89 matthew 955: $data->{'award'},
956: $data->{'awarded'},
957: $data->{'previous'})."'),";
958: $store_rows++;
959: }
960: }
961: }
962: if ($store_rows) {
963: chop($store_command);
964: $dbh->do($store_command);
965: if ($dbh->err) {
1.182 albertel 966: $returnstatus = 'error saving part data';
1.89 matthew 967: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
968: &Apache::lonnet::logthis("While attempting\n".$store_command);
969: }
970: }
971: ##
972: ## Store the response data
1.207 raeburn 973: my $store_prefix = 'INSERT IGNORE INTO '.$fulldump_response_table.
1.89 matthew 974: ' VALUES '."\n";
975: $store_rows = 0;
1.207 raeburn 976: unless ($requested_max_packet) {
977: (undef,$max_allowed_packet) = $dbh->selectrow_array(
978: qq{show variables LIKE ? },
979: undef,
980: "max_allowed_packet");
981: if ($max_allowed_packet !~ /^\d+$/) {
982: $max_allowed_packet = '';
983: }
984: $requested_max_packet = 1;
985: }
986: my @store_values = ();
987: my $curr_values = '';
988: my $curr_length = 0;
989: my ($max_values);
990: if ($max_allowed_packet) {
991: $max_values = $max_allowed_packet - length($store_prefix);
992: }
1.89 matthew 993: while (my ($symb_id,$hash1) = each (%$respdata)) {
994: while (my ($part_id,$hash2) = each (%$hash1)) {
995: while (my ($resp_id,$hash3) = each (%$hash2)) {
996: while (my ($transaction,$data) = each (%$hash3)) {
1.112 matthew 997: my $submission = $data->{'submission'};
998: # We have to be careful with user supplied input.
999: # most of the time we are okay because it is escaped.
1000: # However, there is one wrinkle: submissions which end in
1001: # and odd number of '\' cause insert errors to occur.
1002: # Best trap this somehow...
1003: $submission = $dbh->quote($submission);
1.207 raeburn 1004: my $sql_values = "('".
1.112 matthew 1005: join("','",$symb_id,$part_id,
1006: $resp_id,$student_id,
1007: $transaction,
1008: $data->{'awarddetail'},
1009: $data->{'response_specific'},
1.162 albertel 1010: $data->{'response_specific_value'},
1.159 albertel 1011: $data->{'response_specific_2'},
1.207 raeburn 1012: $data->{'response_specific_value_2'})."',";
1013: if ($max_values) {
1014: my $length = length($sql_values) + length($submission."),");
1015: if ($length > $max_values) {
1016: &Apache::lonnet::logthis("SQL responsedata insert for student: $sname would exceed max_allowed_packet size");
1017: &Apache::lonnet::logthis("symb_id: $symb_id, part_id: $part_id, resp_id: $resp_id");
1018: &Apache::lonnet::logthis("You may want to increase the max_allowed_packet size from the current: $max_allowed_packet");
1019: $sql_values .= $dbh->quote('WARNING: Submission too large -- see grading interface for actual submission')."),";
1020: $length = length($sql_values);
1021: &Apache::lonnet::logthis("Placeholder inserted instead of value of actual submission");
1022: &Apache::lonnet::logthis("See grading interface for the actual submission");
1023: } else {
1024: $sql_values .= $submission."),";
1025: }
1026: if ($length + $curr_length > $max_values) {
1027: push(@store_values,$curr_values);
1028: $curr_values = $sql_values;
1029: $curr_length = $length;
1030: } else {
1031: $curr_values .= $sql_values;
1032: $curr_length += $length;
1033: }
1034: } else {
1035: $curr_values .= $sql_values.$submission."),";
1036: }
1.89 matthew 1037: $store_rows++;
1038: }
1039: }
1040: }
1041: }
1042: if ($store_rows) {
1.207 raeburn 1043: if ($curr_values ne '') {
1044: push(@store_values,$curr_values);
1045: }
1046: foreach my $item (@store_values) {
1047: chop($item);
1048: if ($item ne '') {
1049: $dbh->do($store_prefix.$item);
1050: if ($dbh->err) {
1051: $returnstatus = 'error saving response data';
1052: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
1053: &Apache::lonnet::logthis("While attempting\n".$store_prefix.$item);
1054: last;
1055: }
1056: }
1.89 matthew 1057: }
1058: }
1059: ##
1060: ## Update the students "current" data in the performance
1061: ## and parameters tables.
1062: my ($status,undef) = &store_student_data
1063: ($sname,$sdom,$courseid,
1064: &Apache::lonnet::convert_dump_to_currentdump(\%studentdata));
1065: if ($returnstatus eq 'okay' && $status ne 'okay') {
1.182 albertel 1066: $returnstatus = 'error saving current data:'.$status;
1.89 matthew 1067: } elsif ($status ne 'okay') {
1.182 albertel 1068: $returnstatus .= ' error saving current data:'.$status;
1.207 raeburn 1069: }
1.89 matthew 1070: ##
1071: ## Update the students time......
1072: if ($returnstatus eq 'okay') {
1.113 matthew 1073: &store_updatetime($student_id,$time_of_retrieval,$time_of_retrieval);
1074: if ($dbh->err) {
1075: if ($returnstatus eq 'okay') {
1076: $returnstatus = 'error updating student time';
1077: } else {
1078: $returnstatus = 'error updating student time';
1079: }
1080: }
1.89 matthew 1081: }
1082: return $returnstatus;
1083: }
1084:
1.57 matthew 1085:
1086: sub update_student_data {
1087: my ($sname,$sdom,$courseid) = @_;
1088: #
1.60 matthew 1089: # Set up database names
1090: &setup_table_names($courseid);
1091: #
1.57 matthew 1092: my $student_id = &get_student_id($sname,$sdom);
1093: my $student = $sname.':'.$sdom;
1094: #
1095: my $returnstatus = 'okay';
1096: #
1097: # Download students data
1098: my $time_of_retrieval = time;
1.177 albertel 1099: my %student_data = &Apache::lonnet::currentdump($courseid,$sdom,$sname);
1100: if (&Apache::lonnet::error(%student_data)) {
1.57 matthew 1101: &Apache::lonnet::logthis('error getting data for '.
1102: $sname.':'.$sdom.' in course '.$courseid.
1.177 albertel 1103: ':'.(%student_data)[0]);
1104: $returnstatus =(%student_data)[0] ;
1.79 matthew 1105: return ($returnstatus,undef);
1.57 matthew 1106: }
1.177 albertel 1107: if (scalar(keys(%student_data)) < 1) {
1.57 matthew 1108: return ('no data',undef);
1109: }
1.89 matthew 1110: my @Results = &store_student_data($sname,$sdom,$courseid,\%student_data);
1111: #
1112: # Set the students update time
1.96 matthew 1113: if ($Results[0] eq 'okay') {
1.148 matthew 1114: &store_updatetime($student_id,$time_of_retrieval);
1.95 matthew 1115: }
1.89 matthew 1116: #
1117: return @Results;
1118: }
1119:
1.113 matthew 1120: sub store_updatetime {
1121: my ($student_id,$updatetime,$fullupdatetime)=@_;
1122: my $values = '';
1123: if (defined($updatetime)) {
1124: $values = 'updatetime='.$updatetime.' ';
1125: }
1126: if (defined($fullupdatetime)) {
1127: if ($values ne '') {
1128: $values .= ',';
1129: }
1130: $values .= 'fullupdatetime='.$fullupdatetime.' ';
1131: }
1132: return if ($values eq '');
1133: my $dbh = &Apache::lonmysql::get_dbh();
1134: my $request = 'UPDATE '.$student_table.' SET '.$values.
1135: ' WHERE student_id='.$student_id.' LIMIT 1';
1136: $dbh->do($request);
1137: }
1138:
1.89 matthew 1139: sub store_student_data {
1140: my ($sname,$sdom,$courseid,$student_data) = @_;
1141: #
1142: my $student_id = &get_student_id($sname,$sdom);
1143: my $student = $sname.':'.$sdom;
1144: #
1145: my $returnstatus = 'okay';
1.57 matthew 1146: #
1147: # Remove all of the students data from the table
1.60 matthew 1148: my $dbh = &Apache::lonmysql::get_dbh();
1149: $dbh->do('DELETE FROM '.$performance_table.' WHERE student_id='.
1150: $student_id);
1151: $dbh->do('DELETE FROM '.$parameters_table.' WHERE student_id='.
1152: $student_id);
1.57 matthew 1153: #
1154: # Store away the data
1155: #
1156: my $starttime = Time::HiRes::time;
1157: my $elapsed = 0;
1158: my $rows_stored;
1.205 raeburn 1159: my $store_parameters_prefix = 'INSERT IGNORE INTO '.$parameters_table.
1.60 matthew 1160: ' VALUES '."\n";
1.61 matthew 1161: my $num_parameters = 0;
1.205 raeburn 1162: my $store_performance_prefix = 'INSERT IGNORE INTO '.$performance_table.
1.60 matthew 1163: ' VALUES '."\n";
1.79 matthew 1164: return ('error',undef) if (! defined($dbh));
1.205 raeburn 1165: unless ($requested_max_packet) {
1166: (undef,$max_allowed_packet) = $dbh->selectrow_array(
1167: qq{show variables LIKE ? },
1168: undef,
1169: "max_allowed_packet");
1170: if ($max_allowed_packet !~ /^\d+$/) {
1171: $max_allowed_packet = '';
1172: }
1173: $requested_max_packet = 1;
1174: }
1175: my @store_parameters_values = ();
1176: my $curr_params_values = '';
1177: my $curr_params_length = 0;
1178: my @store_performance_values = ();
1179: my $curr_perf_values = '';
1180: my $curr_perf_length = 0;
1181: my ($max_param,$max_perf);
1182: if ($max_allowed_packet) {
1183: $max_param = $max_allowed_packet - length($store_parameters_prefix);
1184: $max_perf = $max_allowed_packet - length($store_performance_prefix);
1185: }
1.89 matthew 1186: while (my ($current_symb,$param_hash) = each(%{$student_data})) {
1.57 matthew 1187: #
1188: # make sure the symb is set up properly
1189: my $symb_id = &get_symb_id($current_symb);
1190: #
1.147 matthew 1191: # Parameters
1.63 matthew 1192: while (my ($parameter,$value) = each(%$param_hash)) {
1.210 ! raeburn 1193: if ($parameter !~ /(timestamp|resource\.(.*)\.(solved|tries|awarded|award|awarddetail|previous|latefrac))/) {
1.147 matthew 1194: my $sql_parameter = "('".join("','",
1195: $symb_id,$student_id,
1196: $parameter)."',".
1197: $dbh->quote($value)."),\n";
1198: if ($sql_parameter !~ /''/) {
1.205 raeburn 1199: if ($max_param) {
1200: my $length = length($sql_parameter);
1201: if ($length > $max_param) {
1202: &Apache::lonnet::logthis("SQL parameter insert for student: $sname for parameter: $parameter would exceed max_allowed_packet size");
1203: &Apache::lonnet::logthis("symb_id: $symb_id");
1.206 raeburn 1204: &Apache::lonnet::logthis("You may want to increase the max_allowed_packet size from the current: $max_allowed_packet");
1205: if ($parameter =~ /\.submission$/) {
1206: $sql_parameter = "('".join("','",
1207: $symb_id,$student_id,
1208: $parameter)."',".
1209: $dbh->quote('WARNING: Submission too large -- see grading interface for actual submission')."),\n";
1210: $length = length($sql_parameter);
1211: &Apache::lonnet::logthis("Placeholder inserted instead of value of actual submission");
1212: &Apache::lonnet::logthis("See grading interface for the actual submission");
1.205 raeburn 1213: } else {
1.206 raeburn 1214: &Apache::lonnet::logthis("Skipping this item");
1215: next;
1.205 raeburn 1216: }
1217: }
1.206 raeburn 1218: if ($length + $curr_params_length > $max_param) {
1219: push(@store_parameters_values,$curr_params_values);
1220: $curr_params_values = $sql_parameter;
1221: $curr_params_length = $length;
1222: } else {
1223: $curr_params_values .= $sql_parameter;
1224: $curr_params_length += $length;
1225: }
1.205 raeburn 1226: } else {
1227: $curr_params_values .= $sql_parameter;
1228: }
1.149 albertel 1229: #$rows_stored++;
1.205 raeburn 1230: $num_parameters ++;
1.57 matthew 1231: }
1232: }
1.147 matthew 1233: }
1234: # Performance
1235: my %stored;
1236: while (my ($parameter,$value) = each(%$param_hash)) {
1237: next if ($parameter !~ /^resource\.(.*)\.(solved|awarded)$/);
1.161 albertel 1238: my $part = $1;
1239: my $which = $2;
1.151 albertel 1240: next if ($part =~ /\./);
1.147 matthew 1241: next if (exists($stored{$part}));
1242: $stored{$part}++;
1.57 matthew 1243: #
1244: my $part_id = &get_part_id($part);
1245: next if (!defined($part_id));
1.161 albertel 1246:
1247: my ($solved,$awarded);
1248: if ($which eq 'solved') {
1249: $solved = $value;
1250: $awarded = $param_hash->{'resource.'.$part.'.awarded'};
1251: } else {
1252: $solved = $param_hash->{'resource.'.$part.'.solved'};
1253: $awarded = $value;
1254: }
1.57 matthew 1255: my $award = $param_hash->{'resource.'.$part.'.award'};
1256: my $awarddetail = $param_hash->{'resource.'.$part.'.awarddetail'};
1257: my $timestamp = $param_hash->{'timestamp'};
1.164 albertel 1258: my $tries = $param_hash->{'resource.'.$part.'.tries'};
1259: if (&symb_is_for_task($current_symb)) {
1260: $tries = $param_hash->{'resource.'.$part.'.version'};
1261: }
1.60 matthew 1262: #
1.74 matthew 1263: $solved = '' if (! defined($solved));
1.57 matthew 1264: $tries = '' if (! defined($tries));
1265: $awarded = '' if (! defined($awarded));
1266: $award = '' if (! defined($award));
1267: $awarddetail = '' if (! defined($awarddetail));
1.147 matthew 1268: my $sql_performance =
1269: "('".join("','",$symb_id,$student_id,$part_id,$part,
1270: $solved,$tries,$awarded,$award,
1271: $awarddetail,$timestamp)."'),\n";
1.205 raeburn 1272: if ($max_perf) {
1273: my $length = length($sql_performance);
1274: if ($length > $max_perf) {
1275: &Apache::lonnet::logthis("SQL performance insert for student: $sname would exceed max_allowed_packet size");
1276: &Apache::lonnet::logthis("symb_id: $symb_id");
1277: &Apache::lonnet::logthis("Skipping this item. You may want to increase the max_allowed_packet size from the current: $max_allowed_packet");
1278: next;
1279: } else {
1280: if ($length + $curr_perf_length > $max_perf) {
1281: push(@store_performance_values,$curr_perf_values);
1282: $curr_perf_values = $sql_performance;
1283: $curr_perf_length = $length;
1284: } else {
1285: $curr_perf_values .= $sql_performance;
1286: $curr_perf_length += $length;
1287: }
1288: }
1289: } else {
1290: $curr_perf_values .= $sql_performance;
1291: }
1.57 matthew 1292: $rows_stored++;
1293: }
1294: }
1.205 raeburn 1295: if ($curr_params_values ne '') {
1296: push(@store_parameters_values,$curr_params_values);
1297: }
1298: if ($curr_perf_values ne '') {
1299: push(@store_performance_values,$curr_perf_values);
1300: }
1.149 albertel 1301: if (! $rows_stored) { return ($returnstatus, undef); }
1.57 matthew 1302: my $start = Time::HiRes::time;
1.205 raeburn 1303: foreach my $item (@store_performance_values) {
1304: $item =~ s|,\n$||;
1305: if ($item ne '') {
1306: $dbh->do($store_performance_prefix.$item);
1307: if ($dbh->err()) {
1308: &Apache::lonnet::logthis('performance insert error:'.
1309: $dbh->errstr());
1310: &Apache::lonnet::logthis('command = '.$/.$store_performance_prefix.$item);
1311: $returnstatus = 'error: unable to insert performance into database';
1312: return ($returnstatus,$student_data);
1313: }
1314: }
1.94 matthew 1315: }
1.205 raeburn 1316: if ($num_parameters > 0) {
1317: foreach my $item (@store_parameters_values) {
1318: $item =~ s|,\n$||;
1319: if ($item ne '') {
1320: $dbh->do($store_parameters_prefix.$item);
1321: if ($dbh->err()) {
1322: &Apache::lonnet::logthis('parameters insert error:'.
1323: $dbh->errstr());
1324: &Apache::lonnet::logthis('command = '.$/.$store_parameters_prefix.$item);
1325: &Apache::lonnet::logthis('rows_stored = '.$rows_stored);
1326: &Apache::lonnet::logthis('student_id = '.$student_id);
1327: $returnstatus = 'error: unable to insert parameters into database';
1328: return ($returnstatus,$student_data);
1329: }
1330: }
1331: }
1.57 matthew 1332: }
1333: $elapsed += Time::HiRes::time - $start;
1.89 matthew 1334: return ($returnstatus,$student_data);
1.57 matthew 1335: }
1336:
1337:
1.89 matthew 1338: sub ensure_tables_are_set_up {
1339: my ($courseid) = @_;
1.146 albertel 1340: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.61 matthew 1341: #
1342: # Clean out package variables
1.57 matthew 1343: &setup_table_names($courseid);
1344: #
1345: # if the tables do not exist, make them
1346: my @CurrentTable = &Apache::lonmysql::tables_in_db();
1.167 raeburn 1347: my ($found_symb,$found_student,$found_groups,$found_groupnames,$found_part,
1.89 matthew 1348: $found_performance,$found_parameters,$found_fulldump_part,
1.127 matthew 1349: $found_fulldump_response,$found_fulldump_timestamp,
1350: $found_weight);
1.57 matthew 1351: foreach (@CurrentTable) {
1352: $found_symb = 1 if ($_ eq $symb_table);
1353: $found_student = 1 if ($_ eq $student_table);
1.167 raeburn 1354: $found_groups = 1 if ($_ eq $students_groups_table);
1355: $found_groupnames = 1 if ($_ eq $groupnames_table);
1.57 matthew 1356: $found_part = 1 if ($_ eq $part_table);
1357: $found_performance = 1 if ($_ eq $performance_table);
1358: $found_parameters = 1 if ($_ eq $parameters_table);
1.89 matthew 1359: $found_fulldump_part = 1 if ($_ eq $fulldump_part_table);
1360: $found_fulldump_response = 1 if ($_ eq $fulldump_response_table);
1361: $found_fulldump_timestamp = 1 if ($_ eq $fulldump_timestamp_table);
1.127 matthew 1362: $found_weight = 1 if ($_ eq $weight_table);
1.57 matthew 1363: }
1.127 matthew 1364: if (!$found_symb ||
1365: !$found_student || !$found_part ||
1366: !$found_performance || !$found_parameters ||
1.89 matthew 1367: !$found_fulldump_part || !$found_fulldump_response ||
1.127 matthew 1368: !$found_fulldump_timestamp || !$found_weight ) {
1.134 matthew 1369: if (&init_dbs($courseid,1)) {
1.89 matthew 1370: return 'error';
1.57 matthew 1371: }
1372: }
1.89 matthew 1373: }
1374:
1375: sub ensure_current_data {
1376: my ($sname,$sdom,$courseid) = @_;
1377: my $status = 'okay'; # return value
1378: #
1.146 albertel 1379: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.89 matthew 1380: &ensure_tables_are_set_up($courseid);
1.57 matthew 1381: #
1382: # Get the update time for the user
1383: my $updatetime = 0;
1.187 raeburn 1384: my $getuserdir = 1;
1.60 matthew 1385: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1.187 raeburn 1386: ($sdom,$sname,$courseid.'.db',$getuserdir);
1.57 matthew 1387: #
1.177 albertel 1388: if ($modifiedtime == -1) {
1389: return ('no data',undef);
1390: }
1391:
1.87 matthew 1392: my $student_id = &get_student_id($sname,$sdom);
1.196 raeburn 1393: &get_students_groupids($student_id);
1.113 matthew 1394: my @Result = &Apache::lonmysql::get_rows($student_table,
1.87 matthew 1395: "student_id ='$student_id'");
1.57 matthew 1396: my $data = undef;
1397: if (@Result) {
1.180 albertel 1398: $updatetime = $Result[0]->[6]; # Ack! This is dumb!
1.57 matthew 1399: }
1400: if ($modifiedtime > $updatetime) {
1401: ($status,$data) = &update_student_data($sname,$sdom,$courseid);
1402: }
1403: return ($status,$data);
1404: }
1405:
1.89 matthew 1406:
1407: sub ensure_current_full_data {
1408: my ($sname,$sdom,$courseid) = @_;
1409: my $status = 'okay'; # return value
1410: #
1.146 albertel 1411: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.89 matthew 1412: &ensure_tables_are_set_up($courseid);
1413: #
1414: # Get the update time for the user
1.187 raeburn 1415: my $getuserdir = 1;
1.89 matthew 1416: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1.187 raeburn 1417: ($sdom,$sname,$courseid.'.db',$getuserdir);
1.89 matthew 1418: #
1419: my $student_id = &get_student_id($sname,$sdom);
1.196 raeburn 1420: &get_students_groupids($student_id);
1.113 matthew 1421: my @Result = &Apache::lonmysql::get_rows($student_table,
1.89 matthew 1422: "student_id ='$student_id'");
1423: my $updatetime;
1424: if (@Result && ref($Result[0]) eq 'ARRAY') {
1.180 albertel 1425: $updatetime = $Result[0]->[7];
1.89 matthew 1426: }
1427: if (! defined($updatetime) || $modifiedtime > $updatetime) {
1428: $status = &update_full_student_data($sname,$sdom,$courseid);
1429: }
1430: return $status;
1431: }
1432:
1.197 raeburn 1433: sub ensure_current_groups {
1434: my ($courseid) = @_;
1435: my ($cdom,$cnum);
1436: if (defined($courseid)) {
1437: my %coursehash = &Apache::lonnet::coursedescription($courseid);
1438: $cdom = $coursehash{'domain'};
1439: $cnum = $coursehash{'num'};
1440: } elsif ($env{'request.course.id'}) {
1441: $courseid = $env{'request.course.id'};
1442: $cdom = $env{'course.'.$courseid.'.domain'};
1443: $cnum = $env{'course.'.$courseid.'.num'};
1444: }
1445: if ($cdom eq '' || $cnum eq '') {
1446: return 'error: invalid course';
1447: }
1.198 raeburn 1448: &setup_table_names($courseid);
1449: my @CurrentTables = &Apache::lonmysql::tables_in_db();
1450: unless (grep(/^\Q$groupnames_table\E$/,@CurrentTables)) {
1451: return;
1452: }
1.197 raeburn 1453: # Get the update time for the groupnames table
1454: my $getuserdir = 1;
1455: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1456: ($cdom,$cnum,'coursegroups.db',$getuserdir);
1457: my %tableinfo = &Apache::lonmysql::table_information($groupnames_table);
1458: my $updatetime;
1459: if ($tableinfo{'Update_time'}) {
1460: $updatetime = $tableinfo{'Update_time'};
1461: }
1462: if (! defined($updatetime) || $modifiedtime > $updatetime) {
1463: my (%groups_in_sql,%removegroups,$addgroup);
1464: my %curr_groups = &Apache::longroup::coursegroups($cdom,$cnum);
1465: my @Result = &Apache::lonmysql::get_rows($groupnames_table);
1466: foreach my $row (@Result) {
1467: my ($id,$name) = @{$row};
1468: unless (exists($curr_groups{$name})) {
1469: $groups_in_sql{$name}=$id;
1470: } elsif ($id) {
1471: $removegroups{$id} = $name;
1472: }
1473: }
1474: foreach my $group (keys(%curr_groups)) {
1475: unless (exists($groups_in_sql{$group})) {
1476: $addgroup = 1;
1477: last;
1478: }
1479: }
1480: if (keys(%removegroups)) {
1481: my $dbh = &Apache::lonmysql::get_dbh();
1482: foreach my $group_id (keys(%removegroups)) {
1483: my $command = 'DELETE FROM '.$groupnames_table.' WHERE group_id='.
1484: $group_id;
1485: $dbh->do($command);
1486: if ($dbh->err()) {
1487: &Apache::lonnet::logthis("error ".$dbh->errstr().
1488: " occurred executing \n".
1489: "SQL command: $command");
1490: }
1491: }
1492: }
1493: if ($addgroup) {
1494: &populate_groupnames_table($courseid);
1495: }
1496: }
1497: return;
1498: }
1499:
1500: sub ensure_current_students_groups {
1501: my ($courseid) = @_;
1502: my ($cdom,$cnum);
1503: if (defined($courseid)) {
1504: my %coursehash = &Apache::lonnet::coursedescription($courseid);
1505: $cdom = $coursehash{'domain'};
1506: $cnum = $coursehash{'num'};
1507: } elsif ($env{'request.course.id'}) {
1508: $courseid = $env{'request.course.id'};
1509: $cdom = $env{'course.'.$courseid.'.domain'};
1510: $cnum = $env{'course.'.$courseid.'.num'};
1511: }
1.198 raeburn 1512: &setup_table_names($courseid);
1513: my @CurrentTables = &Apache::lonmysql::tables_in_db();
1514: unless (grep(/^\Q$students_groups_table\E$/,@CurrentTables)) {
1515: return;
1516: }
1.197 raeburn 1517: # Get the update time for the groupnames table
1518: my $getuserdir = 1;
1519: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1520: ($cdom,$cnum,'groupmembership.db',$getuserdir);
1521: my %tableinfo = &Apache::lonmysql::table_information($students_groups_table);
1522: my $updatetime;
1523: if ($tableinfo{'Update_time'}) {
1524: $updatetime = $tableinfo{'Update_time'};
1525: }
1526: if ((!defined($updatetime)) || ($modifiedtime > $updatetime)) {
1527: if (&Apache::lonmysql::drop_table($students_groups_table)) {
1528: if (&init_dbs($courseid)) {
1529: return "error creating $students_groups_table\n";
1530: } else {
1531: &populate_students_groups_table($courseid);
1532: }
1533: }
1534: }
1535: return;
1536: }
1.57 matthew 1537:
1.200 raeburn 1538: sub ensure_current_sections {
1539: my ($courseid) = @_;
1540: my ($cdom,$cnum);
1541: if (defined($courseid)) {
1542: my %coursehash = &Apache::lonnet::coursedescription($courseid);
1543: $cdom = $coursehash{'domain'};
1544: $cnum = $coursehash{'num'};
1545: } elsif ($env{'request.course.id'}) {
1546: $courseid = $env{'request.course.id'};
1547: $cdom = $env{'course.'.$courseid.'.domain'};
1548: $cnum = $env{'course.'.$courseid.'.num'};
1549: }
1550: &setup_table_names($courseid);
1551: my @CurrentTables = &Apache::lonmysql::tables_in_db();
1552: unless (grep(/^\Q$student_table\E$/,@CurrentTables)) {
1553: return;
1554: }
1555: # Get the update time for the student table
1556: my $getuserdir = 1;
1557: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1558: ($cdom,$cnum,'classlist.db',$getuserdir);
1559: my %tableinfo = &Apache::lonmysql::table_information($student_table);
1560: my $updatetime;
1561: if ($tableinfo{'Update_time'}) {
1562: $updatetime = $tableinfo{'Update_time'};
1563: }
1564: if ((!defined($updatetime)) || ($modifiedtime > $updatetime)) {
1.201 raeburn 1565: &update_student_table($cdom,$cnum);
1566: }
1567: return;
1568: }
1569:
1570: sub update_student_table {
1571: my ($cdom,$cnum) = @_;
1572: return unless (($cdom ne '') && ($cnum ne ''));
1573: my (%roster,%sqldata);
1574: my $classlist = &get_classlist($cdom,$cnum);
1575: while (my ($student,$data) = each (%$classlist)) {
1576: my ($section,$start,$end) = ($data->[&CL_SECTION()],
1577: $data->[&CL_START()],
1578: $data->[&CL_END()]);
1579: if ($section eq '' || $section =~ /^\s*$/) {
1580: $section = 'none';
1581: }
1582: if ($start eq '') { $start = 0; }
1583: if ($end eq '') { $end = 0; }
1584: $roster{$student}{'section'} = $section;
1585: $roster{$student}{'start'} = $start;
1586: $roster{$student}{'end'} = $end;
1587: }
1588: my $dbh = &Apache::lonmysql::get_dbh();
1589: my $statement = "SELECT student_id,student,section,start,end FROM $student_table";
1590: my $sth = $dbh->prepare($statement);
1591: $sth->execute();
1592: if ($sth->err()) {
1593: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1594: &Apache::lonnet::logthis("\n".$statement."\n");
1595: &Apache::lonnet::logthis("error is:".$sth->errstr());
1596: return undef;
1597: }
1598: foreach my $row (@{$sth->fetchall_arrayref}) {
1599: my ($id,$student,$section,$start,$end) = (@$row);
1600: if (ref($roster{$student}) eq 'HASH') {
1601: if (($roster{$student}{'section'} ne $section) ||
1602: ($roster{$student}{'start'} ne $start) ||
1603: ($roster{$student}{'end'} ne $end)) {
1604: $sqldata{$id} = {
1605: section => $roster{$student}{'section'},
1606: start => $roster{$student}{'start'},
1607: end => $roster{$student}{'end'},
1608: };
1.200 raeburn 1609: }
1610: }
1611: }
1.201 raeburn 1612: $sth->finish();
1613: if (keys(%sqldata)) {
1614: foreach my $id (sort { $a <=> $b } keys(%sqldata)) {
1615: my $request = "UPDATE $student_table SET section='$sqldata{$id}{section}'".
1616: ", start='$sqldata{$id}{start}'".
1617: ", end='$sqldata{$id}{end}' WHERE student_id='$id'";
1618: $dbh->do($request);
1619: }
1620: }
1.200 raeburn 1621: return;
1622: }
1623:
1.57 matthew 1624: sub get_student_data_from_performance_cache {
1625: my ($sname,$sdom,$symb,$courseid)=@_;
1626: my $student = $sname.':'.$sdom if (defined($sname) && defined($sdom));
1.61 matthew 1627: &setup_table_names($courseid);
1.57 matthew 1628: #
1629: # Return hash
1630: my $studentdata;
1631: #
1632: my $dbh = &Apache::lonmysql::get_dbh();
1633: my $request = "SELECT ".
1.73 matthew 1634: "d.symb,a.part,a.solved,a.tries,a.awarded,a.award,a.awarddetail,".
1.63 matthew 1635: "a.timestamp ";
1.57 matthew 1636: if (defined($student)) {
1637: $request .= "FROM $student_table AS b ".
1638: "LEFT JOIN $performance_table AS a ON b.student_id=a.student_id ".
1.73 matthew 1639: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1.57 matthew 1640: "LEFT JOIN $symb_table AS d ON d.symb_id = a.symb_id ".
1641: "WHERE student='$student'";
1642: if (defined($symb) && $symb ne '') {
1.67 matthew 1643: $request .= " AND d.symb=".$dbh->quote($symb);
1.57 matthew 1644: }
1645: } elsif (defined($symb) && $symb ne '') {
1646: $request .= "FROM $symb_table as d ".
1647: "LEFT JOIN $performance_table AS a ON d.symb_id=a.symb_id ".
1.73 matthew 1648: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1.57 matthew 1649: "LEFT JOIN $student_table AS b ON b.student_id = a.student_id ".
1650: "WHERE symb='".$dbh->quote($symb)."'";
1651: }
1652: my $starttime = Time::HiRes::time;
1653: my $rows_retrieved = 0;
1654: my $sth = $dbh->prepare($request);
1655: $sth->execute();
1656: if ($sth->err()) {
1657: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1658: &Apache::lonnet::logthis("\n".$request."\n");
1659: &Apache::lonnet::logthis("error is:".$sth->errstr());
1660: return undef;
1661: }
1662: foreach my $row (@{$sth->fetchall_arrayref}) {
1663: $rows_retrieved++;
1.63 matthew 1664: my ($symb,$part,$solved,$tries,$awarded,$award,$awarddetail,$time) =
1.57 matthew 1665: (@$row);
1666: my $base = 'resource.'.$part;
1667: $studentdata->{$symb}->{$base.'.solved'} = $solved;
1668: $studentdata->{$symb}->{$base.'.tries'} = $tries;
1669: $studentdata->{$symb}->{$base.'.awarded'} = $awarded;
1670: $studentdata->{$symb}->{$base.'.award'} = $award;
1671: $studentdata->{$symb}->{$base.'.awarddetail'} = $awarddetail;
1672: $studentdata->{$symb}->{'timestamp'} = $time if (defined($time) && $time ne '');
1.67 matthew 1673: }
1.97 matthew 1674: ## Get misc parameters
1675: $request = 'SELECT c.symb,a.parameter,a.value '.
1676: "FROM $student_table AS b ".
1677: "LEFT JOIN $parameters_table AS a ON b.student_id=a.student_id ".
1678: "LEFT JOIN $symb_table AS c ON c.symb_id = a.symb_id ".
1679: "WHERE student='$student'";
1680: if (defined($symb) && $symb ne '') {
1681: $request .= " AND c.symb=".$dbh->quote($symb);
1682: }
1683: $sth = $dbh->prepare($request);
1684: $sth->execute();
1685: if ($sth->err()) {
1686: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1687: &Apache::lonnet::logthis("\n".$request."\n");
1688: &Apache::lonnet::logthis("error is:".$sth->errstr());
1689: if (defined($symb) && $symb ne '') {
1690: $studentdata = $studentdata->{$symb};
1691: }
1692: return $studentdata;
1693: }
1694: #
1695: foreach my $row (@{$sth->fetchall_arrayref}) {
1696: $rows_retrieved++;
1697: my ($symb,$parameter,$value) = (@$row);
1698: $studentdata->{$symb}->{$parameter} = $value;
1699: }
1700: #
1.67 matthew 1701: if (defined($symb) && $symb ne '') {
1702: $studentdata = $studentdata->{$symb};
1.57 matthew 1703: }
1704: return $studentdata;
1705: }
1706:
1.46 matthew 1707:
1708: sub get_current_state {
1.47 matthew 1709: my ($sname,$sdom,$symb,$courseid,$forcedownload)=@_;
1710: #
1.146 albertel 1711: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.47 matthew 1712: #
1.61 matthew 1713: return () if (! defined($sname) || ! defined($sdom));
1714: #
1.57 matthew 1715: my ($status,$data) = &ensure_current_data($sname,$sdom,$courseid);
1.77 matthew 1716: # &Apache::lonnet::logthis
1717: # ('sname = '.$sname.
1718: # ' domain = '.$sdom.
1719: # ' status = '.$status.
1720: # ' data is '.(defined($data)?'defined':'undefined'));
1.73 matthew 1721: # while (my ($symb,$hash) = each(%$data)) {
1722: # &Apache::lonnet::logthis($symb."\n----------------------------------");
1723: # while (my ($key,$value) = each (%$hash)) {
1724: # &Apache::lonnet::logthis(" ".$key." = ".$value);
1725: # }
1726: # }
1.47 matthew 1727: #
1.79 matthew 1728: if (defined($data) && defined($symb) && ref($data->{$symb})) {
1729: return %{$data->{$symb}};
1730: } elsif (defined($data) && ! defined($symb) && ref($data)) {
1731: return %$data;
1732: }
1733: if ($status eq 'no data') {
1.57 matthew 1734: return ();
1735: } else {
1736: if ($status ne 'okay' && $status ne '') {
1737: &Apache::lonnet::logthis('status = '.$status);
1.177 albertel 1738: return ('error: '.$status,undef);
1.47 matthew 1739: }
1.57 matthew 1740: my $returnhash = &get_student_data_from_performance_cache($sname,$sdom,
1741: $symb,$courseid);
1742: return %$returnhash if (defined($returnhash));
1.46 matthew 1743: }
1.57 matthew 1744: return ();
1.61 matthew 1745: }
1746:
1747:
1.190 jms 1748: sub get_problem_statistics {
1749: my ($Sections,$Groups,$status,$symb,$part,$courseid,$starttime,$endtime) = @_;
1750: return if (! defined($symb) || ! defined($part));
1751: $courseid = $env{'request.course.id'} if (! defined($courseid));
1752: #
1753: &setup_table_names($courseid);
1754: my $symb_id = &get_symb_id($symb);
1755: my $part_id = &get_part_id($part);
1756: my $stats_table = &temp_table_name($courseid,'problem_stats');
1757: #
1758: my $dbh = &Apache::lonmysql::get_dbh();
1759: return undef if (! defined($dbh));
1760: #
1761: # Clean out the table
1762: $dbh->do('DROP TABLE '.$stats_table); # May return an error
1763: my $request =
1764: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
1765: 'SELECT a.student_id,a.solved,a.award,a.awarded,a.tries '.
1766: 'FROM '.$performance_table.' AS a ';
1767: #
1768: # See if we need to include some requirements on the students
1769: if ((defined($Sections) && lc($Sections->[0]) ne 'all') ||
1770: (defined($status) && lc($status) ne 'any')) {
1771: $request .= 'NATURAL LEFT JOIN '.$student_table.' AS b ';
1772: }
1773: my ($groups_join,$group_limits) = &limit_by_group($Groups,'b','c','d');
1774: if (defined($groups_join)) {
1775: $request .= $groups_join;
1776: }
1777: $request .= ' WHERE a.symb_id='.$symb_id.' AND a.part_id='.$part_id;
1778: #
1779: # Limit the students included to those specified
1780: my ($section_limits,$enrollment_limits)=
1781: &limit_by_section_and_status($Sections,$status,'b');
1782: #
1783: # Limit by starttime and endtime
1784: my $time_requirements = undef;
1785: if (defined($starttime)) {
1786: $time_requirements .= 'a.timestamp>='.$starttime;
1787: if (defined($endtime)) {
1788: $time_requirements .= ' AND a.timestamp<='.$endtime;
1789: }
1790: } elsif (defined($endtime)) {
1791: $time_requirements .= 'a.timestamp<='.$endtime;
1.122 matthew 1792: }
1793: if (defined($time_requirements)) {
1794: $request .= ' AND '.$time_requirements;
1.115 matthew 1795: }
1.178 albertel 1796: if (defined($section_limits)) {
1797: $request .= ' AND '.$section_limits;
1798: }
1799: if (defined($enrollment_limits)) {
1800: $request .= ' AND '.$enrollment_limits;
1801: }
1.167 raeburn 1802: # Limit by group, as required
1803: if (defined($group_limits)) {
1804: $request .= ' AND '.$group_limits;
1805: }
1.123 matthew 1806: #
1807: # Finally, execute the request to create the temporary table
1.61 matthew 1808: $dbh->do($request);
1.123 matthew 1809: #
1810: # Collect the first suite of statistics
1.128 matthew 1811: $request = 'SELECT COUNT(*),SUM(tries),'.
1812: 'AVG(tries),STD(tries) '.
1.109 matthew 1813: 'FROM '.$stats_table;
1.128 matthew 1814: my ($num,$tries,$mean,$STD) = &execute_SQL_request
1.109 matthew 1815: ($dbh,$request);
1.128 matthew 1816: #
1817: $request = 'SELECT MAX(tries),MIN(tries) FROM '.$stats_table.
1818: ' WHERE awarded>0';
1819: my ($max,$min) = &execute_SQL_request($dbh,$request);
1820: #
1.109 matthew 1821: $request = 'SELECT SUM(awarded) FROM '.$stats_table;
1822: my ($Solved) = &execute_SQL_request($dbh,$request);
1.128 matthew 1823: #
1.109 matthew 1824: $request = 'SELECT SUM(awarded) FROM '.$stats_table.
1825: " WHERE solved='correct_by_override'";
1826: my ($solved) = &execute_SQL_request($dbh,$request);
1827: #
1.133 matthew 1828: $Solved -= $solved;
1829: #
1.61 matthew 1830: $num = 0 if (! defined($num));
1831: $tries = 0 if (! defined($tries));
1.128 matthew 1832: $max = 0 if (! defined($max));
1833: $min = 0 if (! defined($min));
1.61 matthew 1834: $STD = 0 if (! defined($STD));
1.133 matthew 1835: $Solved = 0 if (! defined($Solved) || $Solved < 0);
1.61 matthew 1836: $solved = 0 if (! defined($solved));
1837: #
1.123 matthew 1838: # Compute the more complicated statistics
1.61 matthew 1839: my $DegOfDiff = 'nan';
1.66 matthew 1840: $DegOfDiff = 1-($Solved)/$tries if ($tries>0);
1.123 matthew 1841: #
1.61 matthew 1842: my $SKEW = 'nan';
1.66 matthew 1843: my $wrongpercent = 0;
1.128 matthew 1844: my $numwrong = 'nan';
1.61 matthew 1845: if ($num > 0) {
1846: ($SKEW) = &execute_SQL_request($dbh,'SELECT SQRT(SUM('.
1847: 'POWER(tries - '.$STD.',3)'.
1848: '))/'.$num.' FROM '.$stats_table);
1.128 matthew 1849: $numwrong = $num-$Solved;
1850: $wrongpercent=int(10*100*$numwrong/$num)/10;
1.61 matthew 1851: }
1852: #
1.123 matthew 1853: # Drop the temporary table
1854: $dbh->do('DROP TABLE '.$stats_table); # May return an error
1.81 matthew 1855: #
1856: # Return result
1.66 matthew 1857: return { num_students => $num,
1858: tries => $tries,
1.128 matthew 1859: max_tries => $max,
1860: min_tries => $min,
1.66 matthew 1861: mean_tries => $mean,
1862: std_tries => $STD,
1863: skew_tries => $SKEW,
1864: num_solved => $Solved,
1865: num_override => $solved,
1.128 matthew 1866: num_wrong => $numwrong,
1.66 matthew 1867: per_wrong => $wrongpercent,
1.81 matthew 1868: deg_of_diff => $DegOfDiff };
1.61 matthew 1869: }
1870:
1.127 matthew 1871: ##
1872: ## This is a helper for get_statistics
1.61 matthew 1873: sub execute_SQL_request {
1874: my ($dbh,$request)=@_;
1875: # &Apache::lonnet::logthis($request);
1876: my $sth = $dbh->prepare($request);
1.153 albertel 1877: if (!$sth) {
1878: die($dbh->errstr . " SQL: $request");
1879: }
1.61 matthew 1880: $sth->execute();
1881: my $row = $sth->fetchrow_arrayref();
1882: if (ref($row) eq 'ARRAY' && scalar(@$row)>0) {
1883: return @$row;
1884: }
1885: return ();
1886: }
1.123 matthew 1887:
1.127 matthew 1888:
1889: sub populate_weight_table {
1890: my ($courseid) = @_;
1891: if (! defined($courseid)) {
1.146 albertel 1892: $courseid = $env{'request.course.id'};
1.127 matthew 1893: }
1894: #
1895: &setup_table_names($courseid);
1.144 matthew 1896: my $navmap = Apache::lonnavmaps::navmap->new();
1897: if (!defined($navmap)) {
1898: &Apache::lonnet::logthis('loncoursedata::populate_weight_table:'.$/.
1899: ' unable to get navmaps resource'.$/.
1900: ' '.join(' ',(caller)));
1901: return;
1902: }
1903: my @sequences = $navmap->retrieveResources(undef,
1904: sub { shift->is_map(); },1,0,1);
1905: my @resources;
1906: foreach my $seq (@sequences) {
1907: push(@resources,$navmap->retrieveResources($seq,
1.202 raeburn 1908: sub {shift->is_gradable();},
1.144 matthew 1909: 0,0,0));
1910: }
1911: if (! scalar(@resources)) {
1912: &Apache::lonnet::logthis('loncoursedata::populate_weight_table:'.$/.
1913: ' no resources returned for '.$courseid);
1.127 matthew 1914: return;
1915: }
1916: # Since we use lonnet::EXT to retrieve problem weights,
1917: # to ensure current data we must clear the caches out.
1918: &Apache::lonnet::clear_EXT_cache_status();
1919: my $dbh = &Apache::lonmysql::get_dbh();
1920: my $request = 'INSERT IGNORE INTO '.$weight_table.
1921: "(symb_id,part_id,weight) VALUES ";
1922: my $weight;
1.144 matthew 1923: foreach my $res (@resources) {
1924: my $symb_id = &get_symb_id($res->symb);
1925: foreach my $part (@{$res->parts}) {
1.127 matthew 1926: my $part_id = &get_part_id($part);
1927: $weight = &Apache::lonnet::EXT('resource.'.$part.'.weight',
1.144 matthew 1928: $res->symb,
1.127 matthew 1929: undef,undef,undef);
1930: if (!defined($weight) || ($weight eq '')) {
1931: $weight=1;
1932: }
1933: $request .= "('".$symb_id."','".$part_id."','".$weight."'),";
1934: }
1935: }
1936: $request =~ s/(,)$//;
1937: # &Apache::lonnet::logthis('request = '.$/.$request);
1938: $dbh->do($request);
1939: if ($dbh->err()) {
1940: &Apache::lonnet::logthis("error ".$dbh->errstr().
1.188 bisitz 1941: " occurred executing \n".
1.127 matthew 1942: $request);
1943: }
1944: return;
1945: }
1946:
1.129 matthew 1947: sub limit_by_start_end_time {
1948: my ($starttime,$endtime,$table) = @_;
1949: my $time_requirements = undef;
1950: if (defined($starttime)) {
1951: $time_requirements .= $table.".timestamp>='".$starttime."'";
1952: if (defined($endtime)) {
1953: $time_requirements .= " AND ".$table.".timestamp<='".$endtime."'";
1954: }
1955: } elsif (defined($endtime)) {
1956: $time_requirements .= $table.".timestamp<='".$endtime."'";
1957: }
1958: return $time_requirements;
1959: }
1960:
1.127 matthew 1961:
1962: sub limit_by_section_and_status {
1963: my ($Sections,$enrollment,$tablename) = @_;
1964: my $student_requirements = undef;
1965: if ( (defined($Sections) && $Sections->[0] ne 'all')) {
1966: $student_requirements = '('.
1967: join(' OR ', map { $tablename.".section='".$_."'" } @$Sections
1968: ).')';
1969: }
1970: my $enrollment_requirements=undef;
1971: if (defined($enrollment) && $enrollment ne 'Any') {
1.178 albertel 1972: my $now = time();
1973: if ( $enrollment eq 'Future' ) {
1974: $enrollment_requirements =
1975: "( $tablename.start > $now AND ".
1976: "( $tablename.end = 0 OR $tablename.end > $now))";
1977: } elsif ( $enrollment eq 'Active' ) {
1978: $enrollment_requirements =
1979: "(( $tablename.start = 0 OR $tablename.start < $now ) AND ".
1980: " ( $tablename.end = 0 OR $tablename.end > $now ))";
1981: } elsif ( $enrollment eq 'Expired' ) {
1982: $enrollment_requirements =
1983: "(( $tablename.start < $now ) AND ".
1984: " ( $tablename.end < $now ))";
1985: }
1.127 matthew 1986: }
1987: return ($student_requirements,$enrollment_requirements);
1988: }
1989:
1.190 jms 1990:
1.167 raeburn 1991:
1992: sub limit_by_group {
1993: my ($Groups,$stutable,$grptable,$stugrptab) = @_;
1994: my $groups_join = undef;
1995: my $group_limits = undef;
1996: if ( (defined($Groups) && $Groups->[0] ne 'all')) {
1997: $groups_join =
1998: ' LEFT JOIN '.$students_groups_table.
1999: ' AS '.$stugrptab.' ON '.
2000: $stugrptab.'.student_id = '.$stutable.'.student_id'.
2001: ' LEFT JOIN '.$groupnames_table.
2002: ' AS '.$grptable.' ON '.
2003: $stugrptab.'.group_id = '.$grptable.'.group_id ';
2004: $group_limits =
2005: ' ('.
2006: join(' OR ', map { "$grptable.groupname='".$_."'" } @$Groups
2007: ).')';
2008: }
2009: return ($groups_join,$group_limits);
2010: }
1.127 matthew 2011:
2012:
2013: sub RNK_student { return 0; };
2014: sub RNK_score { return 1; };
2015:
2016: sub rank_students_by_scores_on_resources {
1.167 raeburn 2017: my ($resources,$Sections,$Groups,$enrollment,$courseid,$starttime,$endtime,
2018: $has_award_for) = @_;
1.127 matthew 2019: return if (! defined($resources) || ! ref($resources) eq 'ARRAY');
2020: if (! defined($courseid)) {
1.146 albertel 2021: $courseid = $env{'request.course.id'};
1.127 matthew 2022: }
2023: #
2024: &setup_table_names($courseid);
2025: my $dbh = &Apache::lonmysql::get_dbh();
2026: my ($section_limits,$enrollment_limits)=
2027: &limit_by_section_and_status($Sections,$enrollment,'b');
1.167 raeburn 2028: my ($groups_join,$group_limits) = &limit_by_group($Groups,'b','c','d');
1.127 matthew 2029: my $symb_limits = '('.join(' OR ',map {'a.symb_id='.&get_symb_id($_);
2030: } @$resources
2031: ).')';
1.154 bowersj2 2032: my ($award_col, $award_join, $award_clause) = ('', '', '');
1.155 albertel 2033: if ($has_award_for) {
1.154 bowersj2 2034: my $resource_id = &get_symb_id($has_award_for);
2035: $award_col = ", perf.awarded";
2036: $award_join = "LEFT JOIN $performance_table AS perf ON perf.symb_id"
2037: ." = $resource_id AND perf.student_id = b.student_id ";
2038: $award_clause = "AND perf.awarded IS NOT NULL";
2039: }
1.130 matthew 2040: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
1.154 bowersj2 2041: my $request = "SELECT b.student,SUM(a.awarded*w.weight) AS score "
2042: ."$award_col FROM $performance_table AS a ".
2043: "NATURAL LEFT JOIN $weight_table AS w ".
2044: "LEFT JOIN $student_table AS b ON a.student_id=b.student_id ".
1.167 raeburn 2045: "$award_join $groups_join ";
2046: my $limits;
1.127 matthew 2047: if (defined($section_limits)) {
1.167 raeburn 2048: $limits .= $section_limits.' AND ';
1.127 matthew 2049: }
2050: if (defined($enrollment_limits)) {
1.167 raeburn 2051: $limits .= $enrollment_limits.' AND ';
1.127 matthew 2052: }
1.130 matthew 2053: if (defined($time_limits)) {
1.167 raeburn 2054: $limits .= $time_limits.' AND ';
1.130 matthew 2055: }
1.127 matthew 2056: if ($symb_limits ne '()') {
1.167 raeburn 2057: $limits .= $symb_limits.' AND ';
2058: }
2059: if (defined($group_limits)) {
2060: $limits .= $group_limits.' AND ';
1.127 matthew 2061: }
1.167 raeburn 2062: if ($limits) {
2063: $limits =~ s/( AND )$//; # Remove extra conjunction
2064: $request .= "WHERE $limits";
2065: }
1.203 raeburn 2066: $request .= " $award_clause GROUP BY a.student_id ORDER BY score, b.student";
1.127 matthew 2067: #&Apache::lonnet::logthis('request = '.$/.$request);
1.154 bowersj2 2068: my $sth = $dbh->prepare($request) or die "Can't prepare $request";
1.127 matthew 2069: $sth->execute();
2070: my $rows = $sth->fetchall_arrayref();
2071: return ($rows);
2072: }
2073:
2074: sub get_sum_of_scores {
1.143 matthew 2075: my ($symb,$part,$students,$courseid,$starttime,$endtime) = @_;
1.127 matthew 2076: if (! defined($courseid)) {
1.146 albertel 2077: $courseid = $env{'request.course.id'};
1.127 matthew 2078: }
1.138 matthew 2079: if (defined($students) &&
2080: ((@$students == 0) ||
2081: (@$students == 1 && (! defined($students->[0]) ||
2082: $students->[0] eq ''))
2083: )
2084: ){
2085: undef($students);
2086: }
1.127 matthew 2087: #
2088: &setup_table_names($courseid);
2089: my $dbh = &Apache::lonmysql::get_dbh();
1.130 matthew 2090: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
1.127 matthew 2091: my $request = 'SELECT SUM(a.awarded*w.weight),SUM(w.weight) FROM '.
2092: $performance_table.' AS a '.
2093: 'NATURAL LEFT JOIN '.$weight_table.' AS w ';
1.143 matthew 2094: $request .= 'WHERE a.symb_id='.&get_symb_id($symb).
1.127 matthew 2095: ' AND a.part_id='.&get_part_id($part);
1.130 matthew 2096: if (defined($time_limits)) {
2097: $request .= ' AND '.$time_limits;
2098: }
1.127 matthew 2099: if (defined($students)) {
2100: $request .= ' AND ('.
2101: join(' OR ',map {'a.student_id='.&get_student_id(split(':',$_));
2102: } @$students).
2103: ')';
2104: }
2105: my $sth = $dbh->prepare($request);
2106: $sth->execute();
2107: my $rows = $sth->fetchrow_arrayref();
2108: if ($dbh->err) {
1.138 matthew 2109: &Apache::lonnet::logthis('error 1 = '.$dbh->errstr());
2110: &Apache::lonnet::logthis('prepared then executed, fetchrow_arrayrefed'.
2111: $/.$request);
1.127 matthew 2112: return (undef,undef);
2113: }
2114: return ($rows->[0],$rows->[1]);
2115: }
2116:
1.129 matthew 2117:
2118: sub score_stats {
1.167 raeburn 2119: my ($Sections,$Groups,$enrollment,$symbs,$starttime,$endtime,$courseid)=@_;
1.129 matthew 2120: if (! defined($courseid)) {
1.146 albertel 2121: $courseid = $env{'request.course.id'};
1.129 matthew 2122: }
2123: #
2124: &setup_table_names($courseid);
2125: my $dbh = &Apache::lonmysql::get_dbh();
2126: #
2127: my ($section_limits,$enrollment_limits)=
2128: &limit_by_section_and_status($Sections,$enrollment,'b');
1.167 raeburn 2129: my ($groups_join,$group_limits) = &limit_by_group($Groups,'b','c','d');
1.129 matthew 2130: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
2131: my @Symbids = map { &get_symb_id($_); } @{$symbs};
2132: #
1.181 albertel 2133: my $stats_table = &temp_table_name($courseid,'problem_stats');
1.129 matthew 2134: my $symb_restriction = join(' OR ',map {'a.symb_id='.$_;} @Symbids);
2135: my $request = 'DROP TABLE '.$stats_table;
2136: $dbh->do($request);
2137: $request =
2138: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
2139: 'SELECT a.student_id,'.
2140: 'SUM(a.awarded*w.weight) AS score FROM '.
2141: $performance_table.' AS a '.
2142: 'NATURAL LEFT JOIN '.$weight_table.' AS w '.
2143: 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.
1.167 raeburn 2144: $groups_join;
2145: my $limit = ' WHERE ('.$symb_restriction.')';
1.129 matthew 2146: if ($time_limits) {
1.167 raeburn 2147: $limit .= ' AND '.$time_limits;
1.129 matthew 2148: }
2149: if ($section_limits) {
1.167 raeburn 2150: $limit .= ' AND '.$section_limits;
1.129 matthew 2151: }
2152: if ($enrollment_limits) {
1.167 raeburn 2153: $limit .= ' AND '.$enrollment_limits;
1.129 matthew 2154: }
1.167 raeburn 2155: if ($group_limits) {
2156: $limit .= ' AND '.$group_limits;
2157: }
2158: $request .= $limit.' GROUP BY a.student_id';
1.129 matthew 2159: # &Apache::lonnet::logthis('request = '.$/.$request);
2160: my $sth = $dbh->prepare($request);
2161: $sth->execute();
2162: $request =
2163: 'SELECT AVG(score),STD(score),MAX(score),MIN(score),COUNT(score) '.
2164: 'FROM '.$stats_table;
2165: my ($ave,$std,$max,$min,$count) = &execute_SQL_request($dbh,$request);
2166: # &Apache::lonnet::logthis('request = '.$/.$request);
2167:
2168: $request = 'SELECT SUM(weight) FROM '.$weight_table.
1.152 bowersj2 2169: ' AS a WHERE ('.$symb_restriction.')';
1.129 matthew 2170: my ($max_possible) = &execute_SQL_request($dbh,$request);
2171: # &Apache::lonnet::logthis('request = '.$/.$request);
2172: return($min,$max,$ave,$std,$count,$max_possible);
2173: }
2174:
2175:
2176:
2177: sub count_stats {
1.167 raeburn 2178: my ($Sections,$Groups,$enrollment,$symbs,$starttime,$endtime,$courseid)=@_;
1.129 matthew 2179: if (! defined($courseid)) {
1.146 albertel 2180: $courseid = $env{'request.course.id'};
1.129 matthew 2181: }
2182: #
2183: &setup_table_names($courseid);
2184: my $dbh = &Apache::lonmysql::get_dbh();
2185: #
2186: my ($section_limits,$enrollment_limits)=
2187: &limit_by_section_and_status($Sections,$enrollment,'b');
1.167 raeburn 2188: my ($groups_join,$group_limits) = &limit_by_group($Groups,'b','c','d');
1.129 matthew 2189: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
2190: my @Symbids = map { &get_symb_id($_); } @{$symbs};
2191: #
1.181 albertel 2192: my $stats_table = &temp_table_name($courseid,'problem_stats');
1.129 matthew 2193: my $symb_restriction = join(' OR ',map {'a.symb_id='.$_;} @Symbids);
2194: my $request = 'DROP TABLE '.$stats_table;
2195: $dbh->do($request);
2196: $request =
2197: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
2198: 'SELECT a.student_id,'.
1.151 albertel 2199: 'SUM(a.awarded) AS count FROM '.
1.129 matthew 2200: $performance_table.' AS a '.
2201: 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.
1.167 raeburn 2202: $groups_join;
2203: my $limit = ' WHERE ('.$symb_restriction.')';
1.129 matthew 2204: if ($time_limits) {
1.167 raeburn 2205: $limit .= ' AND '.$time_limits;
1.129 matthew 2206: }
2207: if ($section_limits) {
1.167 raeburn 2208: $limit .= ' AND '.$section_limits;
1.129 matthew 2209: }
2210: if ($enrollment_limits) {
1.167 raeburn 2211: $limit .= ' AND '.$enrollment_limits;
1.129 matthew 2212: }
1.167 raeburn 2213: if ($group_limits) {
1.168 raeburn 2214: $limit .= ' AND '.$group_limits;
1.167 raeburn 2215: }
2216: $request .= $limit.' GROUP BY a.student_id';
1.131 matthew 2217: # &Apache::lonnet::logthis('request = '.$/.$request);
1.129 matthew 2218: my $sth = $dbh->prepare($request);
2219: $sth->execute();
2220: $request =
2221: 'SELECT AVG(count),STD(count),MAX(count),MIN(count),COUNT(count) '.
2222: 'FROM '.$stats_table;
2223: my ($ave,$std,$max,$min,$count) = &execute_SQL_request($dbh,$request);
1.131 matthew 2224: # &Apache::lonnet::logthis('request = '.$/.$request);
1.129 matthew 2225: return($min,$max,$ave,$std,$count);
2226: }
1.127 matthew 2227:
2228:
1.105 matthew 2229: sub get_student_data {
2230: my ($students,$courseid) = @_;
1.146 albertel 2231: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.105 matthew 2232: &setup_table_names($courseid);
2233: my $dbh = &Apache::lonmysql::get_dbh();
2234: return undef if (! defined($dbh));
2235: my $request = 'SELECT '.
2236: 'student_id, student '.
2237: 'FROM '.$student_table;
2238: if (defined($students)) {
2239: $request .= ' WHERE ('.
2240: join(' OR ', map {'student_id='.
2241: &get_student_id($_->{'username'},
2242: $_->{'domain'})
2243: } @$students
2244: ).')';
2245: }
2246: $request.= ' ORDER BY student_id';
2247: my $sth = $dbh->prepare($request);
2248: $sth->execute();
2249: if ($dbh->err) {
1.138 matthew 2250: &Apache::lonnet::logthis('error 2 = '.$dbh->errstr());
2251: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
1.105 matthew 2252: return undef;
2253: }
2254: my $dataset = $sth->fetchall_arrayref();
2255: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2256: return $dataset;
2257: }
2258: }
2259:
1.159 albertel 2260: sub RD_student_id { return 0; }
2261: sub RD_awarddetail { return 1; }
2262: sub RD_response_eval { return 2; }
2263: sub RD_response_eval_2 { return 3; }
2264: sub RD_submission { return 4; }
2265: sub RD_timestamp { return 5; }
2266: sub RD_tries { return 6; }
2267: sub RD_sname { return 7; }
1.108 matthew 2268:
2269: sub get_response_data {
1.167 raeburn 2270: my ($Sections,$Groups,$enrollment,$symb,$response,$courseid) = @_;
1.103 matthew 2271: return undef if (! defined($symb) ||
1.100 matthew 2272: ! defined($response));
1.146 albertel 2273: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.100 matthew 2274: #
2275: &setup_table_names($courseid);
2276: my $symb_id = &get_symb_id($symb);
1.137 matthew 2277: if (! defined($symb_id)) {
2278: &Apache::lonnet::logthis('Unable to find symb for '.$symb.' in '.$courseid);
2279: return undef;
2280: }
1.100 matthew 2281: my $response_id = &get_part_id($response);
1.137 matthew 2282: if (! defined($response_id)) {
2283: &Apache::lonnet::logthis('Unable to find id for '.$response.' in '.$courseid);
2284: return undef;
2285: }
1.100 matthew 2286: #
2287: my $dbh = &Apache::lonmysql::get_dbh();
2288: return undef if (! defined($dbh));
1.126 matthew 2289: #
1.127 matthew 2290: my ($student_requirements,$enrollment_requirements) =
2291: &limit_by_section_and_status($Sections,$enrollment,'d');
1.167 raeburn 2292: my ($groups_join,$group_limits) = &limit_by_group($Groups,'d','e','f');
1.100 matthew 2293: my $request = 'SELECT '.
1.105 matthew 2294: 'a.student_id, a.awarddetail, a.response_specific_value, '.
1.159 albertel 2295: 'a.response_specific_value_2, a.submission, b.timestamp, '.
2296: 'c.tries, d.student '.
1.100 matthew 2297: 'FROM '.$fulldump_response_table.' AS a '.
2298: 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2299: 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2300: 'a.transaction = b.transaction '.
2301: 'LEFT JOIN '.$fulldump_part_table.' AS c '.
2302: 'ON a.symb_id=c.symb_id AND a.student_id=c.student_id AND '.
2303: 'a.part_id=c.part_id AND a.transaction = c.transaction '.
1.108 matthew 2304: 'LEFT JOIN '.$student_table.' AS d '.
2305: 'ON a.student_id=d.student_id '.
1.167 raeburn 2306: $groups_join;
2307: my $limit = ' WHERE '.
1.100 matthew 2308: 'a.symb_id='.$symb_id.' AND a.response_id='.$response_id;
1.167 raeburn 2309: if (defined($student_requirements)) {
2310: $limit .= ' AND '.$student_requirements;
2311: }
2312: if (defined($enrollment_requirements)) {
2313: $limit .= ' AND '.$enrollment_requirements;
2314: }
2315: if (defined($group_limits)) {
1.168 raeburn 2316: $limit .= ' AND '.$group_limits;
1.100 matthew 2317: }
1.167 raeburn 2318: $request .= $limit.' ORDER BY b.timestamp';
1.103 matthew 2319: # &Apache::lonnet::logthis("request =\n".$request);
1.100 matthew 2320: my $sth = $dbh->prepare($request);
2321: $sth->execute();
1.105 matthew 2322: if ($dbh->err) {
1.138 matthew 2323: &Apache::lonnet::logthis('error 3 = '.$dbh->errstr());
2324: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
1.105 matthew 2325: return undef;
2326: }
1.100 matthew 2327: my $dataset = $sth->fetchall_arrayref();
2328: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
1.117 matthew 2329: # Clear the \'s from around the submission
2330: for (my $i =0;$i<scalar(@$dataset);$i++) {
1.176 albertel 2331: $dataset->[$i]->[&RD_submission()] =~ s/(\'$|^\')//g;
1.117 matthew 2332: }
1.103 matthew 2333: return $dataset;
1.100 matthew 2334: }
1.118 matthew 2335: }
2336:
2337:
1.159 albertel 2338: sub RDs_awarddetail { return 3; }
2339: sub RDs_submission { return 2; }
2340: sub RDs_timestamp { return 1; }
2341: sub RDs_tries { return 0; }
2342: sub RDs_awarded { return 4; }
2343: sub RDs_response_eval { return 5; }
2344: sub RDs_response_eval_2 { return 6; }
1.160 albertel 2345: sub RDs_part_award { return 7; }
1.118 matthew 2346:
2347: sub get_response_data_by_student {
2348: my ($student,$symb,$response,$courseid) = @_;
2349: return undef if (! defined($symb) ||
2350: ! defined($response));
1.146 albertel 2351: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.118 matthew 2352: #
2353: &setup_table_names($courseid);
2354: my $symb_id = &get_symb_id($symb);
2355: my $response_id = &get_part_id($response);
2356: #
2357: my $student_id = &get_student_id($student->{'username'},
2358: $student->{'domain'});
2359: #
2360: my $dbh = &Apache::lonmysql::get_dbh();
2361: return undef if (! defined($dbh));
2362: my $request = 'SELECT '.
1.159 albertel 2363: 'c.tries, b.timestamp, a.submission, a.awarddetail, c.awarded, '.
1.160 albertel 2364: 'a.response_specific_value, a.response_specific_value_2, c.award '.
1.118 matthew 2365: 'FROM '.$fulldump_response_table.' AS a '.
2366: 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2367: 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2368: 'a.transaction = b.transaction '.
2369: 'LEFT JOIN '.$fulldump_part_table.' AS c '.
2370: 'ON a.symb_id=c.symb_id AND a.student_id=c.student_id AND '.
2371: 'a.part_id=c.part_id AND a.transaction = c.transaction '.
2372: 'LEFT JOIN '.$student_table.' AS d '.
2373: 'ON a.student_id=d.student_id '.
1.119 matthew 2374: 'LEFT JOIN '.$performance_table.' AS e '.
2375: 'ON a.symb_id=e.symb_id AND a.part_id=e.part_id AND '.
2376: 'a.student_id=e.student_id AND c.tries=e.tries '.
1.118 matthew 2377: 'WHERE '.
2378: 'a.symb_id='.$symb_id.' AND a.response_id='.$response_id.
2379: ' AND a.student_id='.$student_id.' ORDER BY b.timestamp';
1.125 matthew 2380: # &Apache::lonnet::logthis("request =\n".$request);
1.118 matthew 2381: my $sth = $dbh->prepare($request);
2382: $sth->execute();
2383: if ($dbh->err) {
1.138 matthew 2384: &Apache::lonnet::logthis('error 4 = '.$dbh->errstr());
2385: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
1.118 matthew 2386: return undef;
2387: }
2388: my $dataset = $sth->fetchall_arrayref();
2389: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2390: # Clear the \'s from around the submission
2391: for (my $i =0;$i<scalar(@$dataset);$i++) {
1.176 albertel 2392: $dataset->[$i]->[&RDs_submission] =~ s/(\'$|^\')//g;
1.118 matthew 2393: }
2394: return $dataset;
2395: }
2396: return undef; # error occurred
1.106 matthew 2397: }
1.108 matthew 2398:
2399: sub RT_student_id { return 0; }
2400: sub RT_awarded { return 1; }
2401: sub RT_tries { return 2; }
2402: sub RT_timestamp { return 3; }
1.106 matthew 2403:
2404: sub get_response_time_data {
1.167 raeburn 2405: my ($sections,$groups,$enrollment,$symb,$part,$courseid) = @_;
1.106 matthew 2406: return undef if (! defined($symb) ||
1.107 matthew 2407: ! defined($part));
1.146 albertel 2408: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.106 matthew 2409: #
2410: &setup_table_names($courseid);
2411: my $symb_id = &get_symb_id($symb);
1.142 matthew 2412: if (! defined($symb_id)) {
2413: &Apache::lonnet::logthis('Unable to find symb for '.$symb.' in '.$courseid);
2414: return undef;
2415: }
1.107 matthew 2416: my $part_id = &get_part_id($part);
1.142 matthew 2417: if (! defined($part_id)) {
2418: &Apache::lonnet::logthis('Unable to find id for '.$part.' in '.$courseid);
2419: return undef;
2420: }
1.106 matthew 2421: #
2422: my $dbh = &Apache::lonmysql::get_dbh();
2423: return undef if (! defined($dbh));
1.142 matthew 2424: my ($student_requirements,$enrollment_requirements) =
2425: &limit_by_section_and_status($sections,$enrollment,'d');
1.167 raeburn 2426: my ($groups_join,$group_limits) = &limit_by_group($groups,'d','e','f');
1.106 matthew 2427: my $request = 'SELECT '.
1.107 matthew 2428: 'a.student_id, a.awarded, a.tries, b.timestamp '.
2429: 'FROM '.$fulldump_part_table.' AS a '.
1.142 matthew 2430: 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2431: 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2432: 'a.transaction = b.transaction '.
2433: 'LEFT JOIN '.$student_table.' as d '.
2434: 'ON a.student_id=d.student_id '.
1.167 raeburn 2435: $groups_join;
2436: my $limit = ' WHERE '.
1.107 matthew 2437: 'a.symb_id='.$symb_id.' AND a.part_id='.$part_id;
1.167 raeburn 2438: if (defined($student_requirements)) {
2439: $limit .= ' AND '.$student_requirements;
2440: }
2441: if (defined($enrollment_requirements)) {
2442: $limit .= ' AND '.$enrollment_requirements;
2443: }
2444: if (defined($group_limits)) {
2445: $limit .= ' AND '.$group_limits;
1.106 matthew 2446: }
1.167 raeburn 2447: $request .= $limit.' ORDER BY b.timestamp';
1.106 matthew 2448: # &Apache::lonnet::logthis("request =\n".$request);
2449: my $sth = $dbh->prepare($request);
2450: $sth->execute();
2451: if ($dbh->err) {
1.138 matthew 2452: &Apache::lonnet::logthis('error 5 = '.$dbh->errstr());
2453: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
1.106 matthew 2454: return undef;
2455: }
2456: my $dataset = $sth->fetchall_arrayref();
2457: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2458: return $dataset;
2459: }
2460:
1.100 matthew 2461: }
1.61 matthew 2462:
1.113 matthew 2463: sub get_student_scores {
1.167 raeburn 2464: my ($sections,$groups,$Symbs,$enrollment,$courseid,$starttime,$endtime) = @_;
1.146 albertel 2465: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.113 matthew 2466: &setup_table_names($courseid);
2467: my $dbh = &Apache::lonmysql::get_dbh();
2468: return (undef) if (! defined($dbh));
1.181 albertel 2469: my $tmptable = &temp_table_name($courseid,'temp_'.time);
1.145 matthew 2470: my $request = 'DROP TABLE IF EXISTS '.$tmptable;
2471: # &Apache::lonnet::logthis('request = '.$/.$request);
2472: $dbh->do($request);
1.114 matthew 2473: #
2474: my $symb_requirements;
1.113 matthew 2475: if (defined($Symbs) && @$Symbs) {
2476: $symb_requirements = '('.
1.114 matthew 2477: join(' OR ', map{ "(a.symb_id='".&get_symb_id($_->{'symb'}).
1.121 matthew 2478: "' AND a.part_id='".&get_part_id($_->{'part'}).
2479: "')"
1.113 matthew 2480: } @$Symbs).')';
2481: }
1.114 matthew 2482: #
1.145 matthew 2483: my ($student_requirements,$enrollment_requirements) =
2484: &limit_by_section_and_status($sections,$enrollment,'b');
1.114 matthew 2485: #
1.167 raeburn 2486: my ($groups_join,$group_limits) = &limit_by_group($groups,'b','d','e');
1.145 matthew 2487: my $time_requirements = &limit_by_start_end_time($starttime,$endtime,'a');
1.114 matthew 2488: ##
1.145 matthew 2489: $request = 'CREATE TEMPORARY TABLE IF NOT EXISTS '.$tmptable.
2490: ' SELECT a.student_id,SUM(a.awarded*c.weight) AS score FROM '.
1.114 matthew 2491: $performance_table.' AS a ';
1.145 matthew 2492: $request .= "LEFT JOIN ".$weight_table.' AS c ON a.symb_id=c.symb_id AND a.part_id=c.part_id ';
1.114 matthew 2493: if (defined($student_requirements) || defined($enrollment_requirements)) {
1.167 raeburn 2494: $request .= ' LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id ';
2495: }
2496: if (defined($groups_join)) {
2497: $request .= $groups_join;
1.114 matthew 2498: }
1.167 raeburn 2499: if (defined($symb_requirements) ||
2500: defined($student_requirements) ||
2501: defined($enrollment_requirements) ||
2502: defined($group_limits) ) {
1.113 matthew 2503: $request .= ' WHERE ';
2504: }
1.114 matthew 2505: if (defined($symb_requirements)) {
2506: $request .= $symb_requirements.' AND ';
2507: }
2508: if (defined($student_requirements)) {
2509: $request .= $student_requirements.' AND ';
2510: }
2511: if (defined($enrollment_requirements)) {
2512: $request .= $enrollment_requirements.' AND ';
2513: }
1.121 matthew 2514: if (defined($time_requirements)) {
2515: $request .= $time_requirements.' AND ';
2516: }
2517: $request =~ s/ AND $//; # Strip of the trailing ' AND '.
1.114 matthew 2518: $request .= ' GROUP BY a.student_id';
2519: # &Apache::lonnet::logthis("request = \n".$request);
1.113 matthew 2520: my $sth = $dbh->prepare($request);
2521: $sth->execute();
2522: if ($dbh->err) {
1.138 matthew 2523: &Apache::lonnet::logthis('error 6 = '.$dbh->errstr());
2524: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
1.113 matthew 2525: return undef;
2526: }
1.208 raeburn 2527: $request = 'SELECT score,COUNT(*) FROM '.$tmptable.' GROUP BY score ORDER BY score';
1.113 matthew 2528: # &Apache::lonnet::logthis("request = \n".$request);
2529: $sth = $dbh->prepare($request);
2530: $sth->execute();
2531: if ($dbh->err) {
1.138 matthew 2532: &Apache::lonnet::logthis('error 7 = '.$dbh->errstr());
2533: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
1.113 matthew 2534: return undef;
2535: }
2536: my $dataset = $sth->fetchall_arrayref();
2537: return $dataset;
2538: }
2539:
1.61 matthew 2540:
2541:
2542: sub setup_table_names {
2543: my ($courseid) = @_;
2544: if (! defined($courseid)) {
1.146 albertel 2545: $courseid = $env{'request.course.id'};
1.61 matthew 2546: }
2547: #
2548: if (! defined($current_course) || $current_course ne $courseid) {
2549: # Clear out variables
2550: $have_read_part_table = 0;
2551: undef(%ids_by_part);
2552: undef(%parts_by_id);
2553: $have_read_symb_table = 0;
2554: undef(%ids_by_symb);
2555: undef(%symbs_by_id);
2556: $have_read_student_table = 0;
2557: undef(%ids_by_student);
2558: undef(%students_by_id);
1.167 raeburn 2559: $have_read_groupnames_table = 0;
2560: undef(%ids_by_groupname);
1.61 matthew 2561: #
2562: $current_course = $courseid;
2563: }
2564: #
2565: # Set up database names
1.181 albertel 2566: my $base_id = 'md5_'.&Digest::MD5::md5_hex($courseid);
1.167 raeburn 2567: $symb_table = $base_id.'_'.'symb';
2568: $part_table = $base_id.'_'.'part';
2569: $student_table = $base_id.'_'.'student';
2570: $groupnames_table = $base_id.'_'.'groupnames';
2571: $students_groups_table = $base_id.'_'.'studentgroups';
2572: $performance_table = $base_id.'_'.'performance';
2573: $parameters_table = $base_id.'_'.'parameters';
1.89 matthew 2574: $fulldump_part_table = $base_id.'_'.'partdata';
2575: $fulldump_response_table = $base_id.'_'.'responsedata';
2576: $fulldump_timestamp_table = $base_id.'_'.'timestampdata';
1.127 matthew 2577: $weight_table = $base_id.'_'.'weight';
1.89 matthew 2578: #
2579: @Tables = (
2580: $symb_table,
2581: $part_table,
2582: $student_table,
1.167 raeburn 2583: $groupnames_table,
2584: $students_groups_table,
1.89 matthew 2585: $performance_table,
2586: $parameters_table,
2587: $fulldump_part_table,
2588: $fulldump_response_table,
2589: $fulldump_timestamp_table,
1.127 matthew 2590: $weight_table,
1.89 matthew 2591: );
1.61 matthew 2592: return;
1.3 stredwic 2593: }
1.1 stredwic 2594:
1.181 albertel 2595: sub temp_table_name {
2596: my ($courseid,$affix) = @_;
2597: my $base_id = 'md5_'.&Digest::MD5::md5_hex($courseid);
2598: return $base_id.'_'.$affix;
2599: }
2600:
1.57 matthew 2601:
1.89 matthew 2602: } # End scope of table identifiers
1.57 matthew 2603:
2604:
2605:
1.190 jms 2606: sub CL_SDOM { return 0; }
2607: sub CL_SNAME { return 1; }
2608: sub CL_END { return 2; }
2609: sub CL_START { return 3; }
2610: sub CL_ID { return 4; }
2611: sub CL_SECTION { return 5; }
2612: sub CL_FULLNAME { return 6; }
2613: sub CL_STATUS { return 7; }
2614: sub CL_TYPE { return 8; }
2615: sub CL_LOCKEDTYPE { return 9; }
1.194 raeburn 2616: sub CL_CREDITS { return 10; }
1.199 raeburn 2617: sub CL_INSTSEC { return 11; }
2618: sub CL_GROUP { return 12; }
2619: sub CL_PERMANENTEMAIL { return 13; }
2620: sub CL_ROLE { return 14; }
2621: sub CL_EXTENT { return 15; }
2622: sub CL_PHOTO { return 16; }
2623: sub CL_THUMBNAIL { return 17; }
2624: sub CL_AUTHORQUOTA { return 18; }
2625: sub CL_AUTHORUSAGE { return 19; }
1.209 raeburn 2626: sub CL_CAMANAGER {return 20; }
1.57 matthew 2627:
1.190 jms 2628: sub get_classlist {
2629: my ($cdom,$cnum) = @_;
1.150 albertel 2630: my $cid = $cdom.'_'.$cnum;
2631: if (!defined($cdom) || !defined($cnum)) {
2632: $cid = $env{'request.course.id'};
2633: $cdom = $env{'course.'.$cid.'.domain'};
2634: $cnum = $env{'course.'.$cid.'.num'};
2635: }
1.57 matthew 2636: my $now = time;
1.35 matthew 2637: #
2638: my %classlist=&Apache::lonnet::dump('classlist',$cdom,$cnum);
2639: while (my ($student,$info) = each(%classlist)) {
1.60 matthew 2640: if ($student =~ /^(con_lost|error|no_such_host)/i) {
2641: &Apache::lonnet::logthis('get_classlist error for '.$cid.':'.$student);
2642: return undef;
2643: }
1.35 matthew 2644: my ($sname,$sdom) = split(/:/,$student);
2645: my @Values = split(/:/,$info);
1.199 raeburn 2646: my ($end,$start,$id,$section,$fullname,$type,$lockedtype,$credits,$instsec);
1.35 matthew 2647: if (@Values > 2) {
1.199 raeburn 2648: ($end,$start,$id,$section,$fullname,$type,$lockedtype,$credits,$instsec) = @Values;
1.35 matthew 2649: } else { # We have to get the data ourselves
2650: ($end,$start) = @Values;
1.37 matthew 2651: $section = &Apache::lonnet::getsection($sdom,$sname,$cid);
1.35 matthew 2652: my %info=&Apache::lonnet::get('environment',
2653: ['firstname','middlename',
2654: 'lastname','generation','id'],
2655: $sdom, $sname);
2656: my ($tmp) = keys(%info);
2657: if ($tmp =~/^(con_lost|error|no_such_host)/i) {
2658: $fullname = 'not available';
2659: $id = 'not available';
1.38 matthew 2660: &Apache::lonnet::logthis('unable to retrieve environment '.
2661: 'for '.$sname.':'.$sdom);
1.35 matthew 2662: } else {
1.141 albertel 2663: $fullname = &Apache::lonnet::format_name(@info{qw/firstname middlename lastname generation/},'lastname');
1.35 matthew 2664: $id = $info{'id'};
2665: }
1.36 matthew 2666: # Update the classlist with this students information
2667: if ($fullname ne 'not available') {
1.141 albertel 2668: my $enrolldata = join(':',$end,$start,$id,$section,$fullname);
2669: my $reply=&Apache::lonnet::cput('classlist',
1.36 matthew 2670: {$student => $enrolldata},
2671: $cdom,$cnum);
2672: if ($reply !~ /^(ok|delayed)/) {
2673: &Apache::lonnet::logthis('Unable to update classlist for '.
2674: 'student '.$sname.':'.$sdom.
2675: ' error:'.$reply);
2676: }
2677: }
1.35 matthew 2678: }
2679: my $status='Expired';
2680: if(((!$end) || $now < $end) && ((!$start) || ($now > $start))) {
2681: $status='Active';
2682: }
1.174 albertel 2683: if(($now < $start) && ((!$end) || $now < $end )) {
2684: $status='Future';
2685: }
1.35 matthew 2686: $classlist{$student} =
1.194 raeburn 2687: [$sdom,$sname,$end,$start,$id,$section,$fullname,$status,$type,
1.199 raeburn 2688: $lockedtype,$credits,$instsec];
1.35 matthew 2689: }
2690: if (wantarray()) {
2691: return (\%classlist,['domain','username','end','start','id',
1.194 raeburn 2692: 'section','fullname','status','type',
1.199 raeburn 2693: 'lockedtype','credits','instsec']);
1.35 matthew 2694: } else {
2695: return \%classlist;
2696: }
2697: }
2698:
1.166 raeburn 2699: sub get_group_memberships {
1.170 raeburn 2700: my ($classlist,$keylist,$cdom,$cnum) = @_;
1.172 albertel 2701:
2702: return ({},{}) if (!ref($classlist) || !ref($keylist));
2703:
1.166 raeburn 2704: my $cid = $cdom.'_'.$cnum;
2705: if (!defined($cdom) || !defined($cnum)) {
2706: $cid = $env{'request.course.id'};
2707: $cdom = $env{'course.'.$cid.'.domain'};
2708: $cnum = $env{'course.'.$cid.'.num'};
2709: }
2710: my (%classgroups,%studentgroups);
2711: my $now = time;
2712: my $access_end = $env{'course.'.$cid.'.default_enrollment_end_date'};
1.171 raeburn 2713: my %curr_groups =&Apache::longroup::coursegroups($cdom,$cnum);
1.169 albertel 2714: if (%curr_groups) {
1.183 banghart 2715: my $grpindex = &CL_GROUP();
1.169 albertel 2716: my %groupmemberhash =
2717: &Apache::lonnet::get_group_membership($cdom,$cnum);
1.166 raeburn 2718: foreach my $student (keys(%{$classlist})) {
2719: %{$classgroups{$student}} = ();
2720: my $hasgroup = 0;
2721: foreach my $status ('previous','future','active','aftercourse') {
2722: %{$classgroups{$student}{$status}} = ();
2723: }
2724: foreach my $group (keys(%curr_groups)) {
2725: if (defined($groupmemberhash{$group.':'.$student})) {
2726: my ($end,$start) = split(/:/,$groupmemberhash{$group.':'.
2727: $student});
2728: if ($start == -1) {
2729: next;
2730: } else {
2731: $studentgroups{$group} ++;
2732: $hasgroup = 1;
2733: if ($end && $end < $now) {
2734: $classgroups{$student}{'previous'}{$group} =
2735: $groupmemberhash{$group.':'.$student};
2736: if ($classlist->{$student}[&CL_STATUS()] eq 'Expired') {
2737: if ($access_end && $access_end < $now) {
2738: if ($access_end - $end < 86400) {
2739: $classgroups{$student}{'aftercourse'}{$group} = $groupmemberhash{$group.':'.$student};
2740: }
2741: }
2742: }
2743: } elsif ($now > $start) {
2744: if (!$end || $end > $now) {
2745: $classgroups{$student}{'active'}{$group} =
2746: $groupmemberhash{$group.':'.$student};
2747: }
2748: } else {
2749: $classgroups{$student}{'future'}{$group} =
2750: $groupmemberhash{$group.':'.$student};
2751: }
2752: }
2753: }
2754: }
2755: if (!$hasgroup) {
2756: $studentgroups{'none'} ++;
1.170 raeburn 2757: } else {
2758: $classlist->{$student}->[$grpindex] = join(',',
2759: sort(keys(%{$classgroups{$student}{'active'}})));
1.166 raeburn 2760: }
2761: }
2762: }
2763: return (\%classgroups,\%studentgroups);
2764: }
2765:
2766: sub get_students_groups {
2767: my ($student,$enrollment_status,$classgroups) = @_;
2768: my @studentsgroups = ();
2769: if (ref($$classgroups{$student}{'active'}) eq 'HASH') {
2770: push(@studentsgroups,keys(%{$$classgroups{$student}{'active'}}));
2771: }
2772: if ($enrollment_status eq 'Any') {
2773: foreach my $status ('previous','future') {
2774: if (ref($$classgroups{$student}{$status}) eq 'HASH') {
2775: push(@studentsgroups,keys(%{$$classgroups{$student}{$status}}));
2776: }
2777: }
2778: } else {
2779: if (ref($$classgroups{$student}{'aftercourse'}) eq 'HASH') {
2780: push(@studentsgroups,keys(%{$$classgroups{$student}{'aftercourse'}}));
2781: }
2782: }
2783: return @studentsgroups;
2784: }
2785:
2786:
1.1 stredwic 2787: # ----- END HELPER FUNCTIONS --------------------------------------------
2788:
2789: 1;
2790: __END__
1.36 matthew 2791:
1.190 jms 2792:
2793: =pod
2794:
2795: =head1 NAME
2796:
2797: Apache::loncoursedata
2798:
2799: =head1 SYNOPSIS
2800:
2801: Set of functions that download and process student and course information.
2802:
2803: =head1 PACKAGES USED
2804:
2805: Apache::lonnet
2806: Apache::longroup
2807: Time::HiRes
2808: Apache::lonmysql
2809: LONCAPA
2810: Digest::MD5
2811:
2812: =head1 DOWNLOAD INFORMATION
2813:
2814: This section contains all the functions that get data from other servers
2815: and/or itself.
2816:
2817:
2818:
2819: =head1 LOCAL DATA CACHING SUBROUTINES
2820:
2821: The local caching is done using MySQL. There is no fall-back implementation
2822: if MySQL is not running.
2823:
2824: The programmers interface is to call &get_current_state() or some other
2825: primary interface subroutine (described below). The internals of this
2826: storage system are documented here.
2827:
2828: There are six tables used to store student performance data (the results of
2829: a dumpcurrent). Each of these tables is created in MySQL with a name of
2830: $courseid_*****, where ***** is 'symb', 'part', or whatever is appropriate
2831: for the table. The tables and their purposes are described below.
2832:
2833: Some notes before we get started.
2834:
2835: Each table must have a PRIMARY KEY, which is a column or set of columns which
2836: will serve to uniquely identify a row of data. NULL is not allowed!
2837:
2838: INDEXes work best on integer data.
2839:
2840: JOIN is used to combine data from many tables into one output.
2841:
2842: lonmysql.pm is used for some of the interface, specifically the table creation
2843: calls. The inserts are done in bulk by directly calling the database handler.
2844: The SELECT ... JOIN statement used to retrieve the data does not have an
2845: interface in lonmysql.pm and I shudder at the thought of writing one.
2846:
2847: =head2 Table Descriptions
2848:
2849: =over 4
2850:
2851: =head2 Tables used to store meta information
2852:
2853: The following tables hold data required to keep track of the current status
2854: of a students data in the tables or to look up the students data in the tables.
2855:
2856: =over 4
2857:
2858: =item C<$symb_table>
2859:
2860: The symb_table has two columns. The first is a 'symb_id' and the second
2861: is the text name for the 'symb' (limited to 64k). The 'symb_id' is generated
2862: automatically by MySQL so inserts should be done on this table with an
2863: empty first element. This table has its PRIMARY KEY on the 'symb_id'.
2864:
2865: =item C<$part_table>
2866:
2867: The part_table has two columns. The first is a 'part_id' and the second
2868: is the text name for the 'part' (limited to 100 characters). The 'part_id' is
2869: generated automatically by MySQL so inserts should be done on this table with
2870: an empty first element. This table has its PRIMARY KEY on the 'part' (100
2871: characters) and a KEY on 'part_id'.
2872:
2873: =item C<$student_table>
2874:
2875: The student_table has 7 columns. The first is a 'student_id' assigned by
2876: MySQL. The second is 'student' which is username:domain. The third through
2877: fifth are 'section', 'status' (enrollment status), and 'classification'
2878: (to be used in the future). The sixth and seventh ('updatetime' and
2879: 'fullupdatetime') contain the time of last update and full update of student
2880: data. This table has its PRIMARY KEY on the 'student_id' column and is indexed
2881: on 'student', 'section', and 'status'.
2882:
2883: =item C<$groupnames_table>
2884:
2885: The groupnames_table has 2 columns. The first is a 'group_id' assigned by
2886: MySQL. The second is 'groupname' which is the name of the group in the course.
2887:
2888: =item C<$students_groups_table>
2889:
2890: The students_groups_table has 2 columns. The first is the 'student_id', and the
2891: second is the 'group_id'. These two columns comprise the PRIMARY KEY for this
2892: table, as an individual student may be affiliated with more than one group at
2893: any time. This table is indexed on both student_id and group_id.
2894:
2895: =back
2896:
2897: =head2 Tables used to store current status data
2898:
2899: The following tables store data only about the students current status on
2900: a problem, meaning only the data related to the last attempt on a problem.
2901:
2902: =over 4
2903:
2904: =item C<$performance_table>
2905:
2906: The performance_table has 9 columns. The first three are 'symb_id',
2907: 'student_id', and 'part_id'. These comprise the PRIMARY KEY for this table
2908: and are directly related to the $symb_table, $student_table, and $part_table
2909: described above. MySQL does better indexing on numeric items than text,
2910: so we use these three "index tables". The remaining columns are
2911: 'solved', 'tries', 'awarded', 'award', 'awarddetail', and 'timestamp'.
2912: These are either the MySQL type TINYTEXT or various integers ('tries' and
2913: 'timestamp'). This table has KEYs of 'student_id' and 'symb_id'.
2914: For use of this table, see the functions described below.
2915:
2916: =item C<$parameters_table>
2917:
2918: The parameters_table holds the data that does not fit neatly into the
2919: performance_table. The parameters table has four columns: 'symb_id',
2920: 'student_id', 'parameter', and 'value'. 'symb_id', 'student_id', and
2921: 'parameter' comprise the PRIMARY KEY for this table. 'parameter' is
2922: limited to 255 characters. 'value' is limited to 64k characters.
2923:
2924: =back
2925:
2926: =head2 Tables used for storing historic data
2927:
2928: The following tables are used to store almost all of the transactions a student
2929: has made on a homework problem. See loncapa/docs/homework/datastorage for
2930: specific information about each of the parameters stored.
2931:
2932: =over 4
2933:
2934: =item C<$fulldump_response_table>
2935:
2936: The response table holds data (documented in loncapa/docs/homework/datastorage)
2937: associated with a particular response id which is stored when a student
2938: attempts a problem. The following are the columns of the table, in order:
2939: 'symb_id','part_id','response_id','student_id','transaction','tries',
2940: 'awarddetail', 'response_specific', 'response_specific_value',
2941: 'response_specific_2', 'response_specific_value_2', and 'submission
2942: (the text of the students submission). The primary key is based on the
2943: first five columns listed above.
2944:
2945: =item C<$fulldump_part_table()>
2946:
2947: The part table holds data (documented in loncapa/docs/homework/datastorage)
2948: associated with a particular part id which is stored when a student attempts
2949: a problem. The following are the columns of the table, in order:
2950: 'symb_id','part_id','student_id','transaction','tries','award','awarded',
2951: and 'previous'. The primary key is based on the first five columns listed
2952: above.
2953:
2954: =item C<$fulldump_timestamp_table()>
2955:
2956: The timestamp table holds the timestamps of the transactions which are
2957: stored in $fulldump_response_table and $fulldump_part_table. This data is
2958: about both the response and part data. Columns: 'symb_id','student_id',
2959: 'transaction', and 'timestamp'.
2960: The primary key is based on the first 3 columns.
2961:
2962: =item C<$weight_table()>
2963:
2964: The weight table holds the weight for the problems used in the class.
2965: Whereas the weight of a problem can vary by section and student the data
2966: here is applied to the class as a whole.
2967: Columns: 'symb_id','part_id','response_id','weight'.
2968:
2969: =back
2970:
2971:
2972: =head1 IMPORTANT SUBROUTINES
2973:
2974: Here is a brief overview of the subroutines which are likely to be of
2975: interest:
2976:
2977: =over 4
2978:
2979: =item C<&get_current_state()>
2980:
2981: programmers interface.
2982:
2983: =item C<&init_dbs()>
2984:
2985: table creation
2986:
2987: =item C<&update_student_data()>
2988:
2989: data storage calls
2990:
2991: =item C<&get_student_data_from_performance_cache()>
2992:
2993: data retrieval
2994:
2995: =back
2996:
2997: =head1 OTHER SUBROUTINES
2998:
2999: =over 4
3000:
3001: =item C<&make_into_hash($values)>
3002:
3003: Returns a reference to a hash as described by $values. $values is
3004: assumed to be the result of
3005: join(':',map {&escape($_)} %orighash);
3006:
3007: This is a helper function for get_current_state.
3008:
3009: =item C<&init_dbs()>
3010:
3011: Input: course id
3012:
3013: Output: 0 on success, positive integer on error
3014:
3015: This routine issues the calls to lonmysql to create the tables used to
3016: store student data.
3017:
3018: item C<&delete_caches()>
3019:
3020: This routine drops all the tables associated with a course from the
3021: MySQL database.
3022:
3023: Input: course id (optional, determined by environment if omitted)
3024:
3025: Returns: nothing
3026:
3027: =item C<&get_part_id()>
3028:
3029: Get the MySQL id of a problem part string.
3030:
3031: Input: $part
3032:
3033: Output: undef on error, integer $part_id on success.
3034:
3035: =item C<&get_part()>
3036:
3037: Get the string describing a part from the MySQL id of the problem part.
3038:
3039: Input: $part_id
3040:
3041: Output: undef on error, $part string on success.
3042:
3043: =item C<&get_symb_id()>
3044:
3045: Get the MySQL id of a symb.
3046:
3047: Input: $symb
3048:
3049: Output: undef on error, integer $symb_id on success.
3050:
3051: =item C<&get_symb()>
3052:
3053: Get the symb associated with a MySQL symb_id.
3054:
3055: Input: $symb_id
3056:
3057: Output: undef on error, $symb on success.
3058:
3059: =item C<&get_student_id()>
3060:
3061: Get the MySQL id of a student.
3062:
3063: Input: $sname, $dom
3064:
3065: Output: undef on error, integer $student_id on success.
3066:
3067: =item C<&get_student()>
3068:
3069: Get student username:domain associated with the MySQL student_id.
3070:
3071: Input: $student_id
3072:
3073: Output: undef on error, string $student (username:domain) on success.
3074:
3075: =item C<&clear_internal_caches()>
3076:
3077: Causes the internal caches used in get_student_id, get_student,
3078: get_symb_id, get_symb, get_part_id, and get_part to be undef'd.
3079:
3080: Needs to be called before the first operation with the MySQL database
3081: for a given Apache request.
3082:
3083: =item C<&update_full_student_data($sname,$sdom,$courseid)>
3084:
3085: Does a lonnet::dump on a student to populate the courses tables.
3086:
3087: Input: $sname, $sdom, $courseid
3088:
3089: Output: $returnstatus
3090:
3091: $returnstatus is a string describing any errors that occurred. 'okay' is the
3092: default.
3093:
3094: This subroutine loads a students data using lonnet::dump and inserts
3095: it into the MySQL database. The inserts are done on three tables,
3096: $fulldump_response_table, $fulldump_part_table, and $fulldump_timestamp_table.
3097: The INSERT calls are made directly by this subroutine, not through lonmysql
3098: because we do a 'bulk'insert which takes advantage of MySQLs non-SQL
3099: compliant INSERT command to insert multiple rows at a time.
3100: If anything has gone wrong during this process, $returnstatus is updated with
3101: a description of the error.
3102:
3103: Once the "fulldump" tables are updated, the tables used for chart and
3104: spreadsheet (which hold only the current state of the student on their
3105: homework, not historical data) are updated. If all updates have occurred
3106: successfully, $student_table is updated to reflect the time of the update.
3107:
3108: Notice we do not insert the data and immediately query it. This means it
3109: is possible for there to be data returned this first time that is not
3110: available the second time. CYA.
3111:
3112:
3113: =item C<&update_student_data()>
3114:
3115: Input: $sname, $sdom, $courseid
3116:
3117: Output: $returnstatus, \%student_data
3118:
3119: $returnstatus is a string describing any errors that occurred. 'okay' is the
3120: default.
3121: \%student_data is the data returned by a call to lonnet::currentdump.
3122:
3123: This subroutine loads a students data using lonnet::currentdump and inserts
3124: it into the MySQL database. The inserts are done on two tables,
3125: $performance_table and $parameters_table. $parameters_table holds the data
3126: that is not included in $performance_table. See the description of
3127: $performance_table elsewhere in this file. The INSERT calls are made
3128: directly by this subroutine, not through lonmysql because we do a 'bulk'
3129: insert which takes advantage of MySQLs non-SQL compliant INSERT command to
3130: insert multiple rows at a time. If anything has gone wrong during this
3131: process, $returnstatus is updated with a description of the error and
3132: \%student_data is returned.
3133:
3134: Notice we do not insert the data and immediately query it. This means it
3135: is possible for there to be data returned this first time that is not
3136: available the second time. CYA.
3137:
3138: =item &ensure_tables_are_set_up($courseid)
3139:
3140: Checks to be sure the MySQL tables for the given class are set up.
3141: If $courseid is omitted it will be obtained from the environment.
3142:
3143: Returns nothing on success and 'error' on failure
3144:
3145:
3146: =item C<&ensure_current_data()>
3147:
3148: Input: $sname, $sdom, $courseid
3149:
3150: Output: $status, $data
3151:
3152: This routine ensures the data for a given student is up to date.
3153: The $student_table is queried to determine the time of the last update.
3154: If the students data is out of date, &update_student_data() is called.
3155: The return values from the call to &update_student_data() are returned.
3156:
3157: =item C<&ensure_current_full_data($sname,$sdom,$courseid)>
3158:
3159: Input: $sname, $sdom, $courseid
3160:
3161: Output: $status
3162:
3163: This routine ensures the fulldata (the data from a lonnet::dump, not a
3164: lonnet::currentdump) for a given student is up to date.
3165: The $student_table is queried to determine the time of the last update.
3166: If the students fulldata is out of date, &update_full_student_data() is
3167: called.
3168:
3169: The return value from the call to &update_full_student_data() is returned.
3170:
3171: =item C<&get_student_data_from_performance_cache()>
3172:
3173: Input: $sname, $sdom, $symb, $courseid
3174:
3175: Output: hash reference containing the data for the given student.
3176: If $symb is undef, all the students data is returned.
3177:
3178: This routine is the heart of the local caching system. See the description
3179: of $performance_table, $symb_table, $student_table, and $part_table. The
3180: main task is building the MySQL request. The tables appear in the request
3181: in the order in which they should be parsed by MySQL. When searching
3182: on a student the $student_table is used to locate the 'student_id'. All
3183: rows in $performance_table which have a matching 'student_id' are returned,
3184: with data from $part_table and $symb_table which match the entries in
3185: $performance_table, 'part_id' and 'symb_id'. When searching on a symb,
3186: the $symb_table is processed first, with matching rows grabbed from
3187: $performance_table and filled in from $part_table and $student_table in
3188: that order.
3189:
3190: Running 'EXPLAIN ' on the 'SELECT' statements generated can be quite
3191: interesting, especially if you play with the order the tables are listed.
3192:
3193:
3194: =item C<&get_current_state()>
3195:
3196: Input: $sname,$sdom,$symb,$courseid
3197:
3198: Output: Described below
3199:
3200: Retrieve the current status of a students performance. $sname and
3201: $sdom are the only required parameters. If $symb is undef the results
3202: of an &Apache::lonnet::currentdump() will be returned.
3203: If $courseid is undef it will be retrieved from the environment.
3204:
3205: The return structure is based on &Apache::lonnet::currentdump. If
3206: $symb is unspecified, all the students data is returned in a hash of
3207: the form:
3208: (
3209: symb1 => { param1 => value1, param2 => value2 ... },
3210: symb2 => { param1 => value1, param2 => value2 ... },
3211: )
3212:
3213: If $symb is specified, a hash of
3214: (
3215: param1 => value1,
3216: param2 => value2,
3217: )
3218: is returned.
3219:
3220: If no data is found for $symb, or if the student has no performance data,
3221: an empty list is returned.
3222:
3223: =item C<&get_problem_statistics()>
3224:
3225: Gather data on a given problem. The database is assumed to be
3226: populated and all local caching variables are assumed to be set
3227: properly. This means you need to call &ensure_current_data for
3228: the students you are concerned with prior to calling this routine.
3229:
3230: Inputs: $Sections, Groups, $status, $symb, $part, $courseid, $starttime,
3231: $endtime
3232:
3233: =over 4
3234:
3235: =item $Sections Array ref containing section names for students.
3236: 'all' is allowed to be the first (and only) item in the array.
3237:
3238: =item $Groups Array ref containing group names for students.
3239: 'all' is allowed to be the first (and only) item in the array.
3240:
3241: =item $status String describing the status of students
3242:
3243: =item $symb is the symb for the problem.
3244:
3245: =item $part is the part id you need statistics for
3246:
3247: =item $courseid is the course id, of course!
3248:
3249: =item $starttime and $endtime are unix times which to use to limit
3250: the statistical data.
3251:
3252: =back
3253:
3254: Outputs: See the code for up to date information. A hash reference is
3255: returned. The hash has the following keys defined:
3256:
3257: =over 4
3258:
3259: =item * num_students
3260:
3261: The number of students attempting the problem
3262:
3263: =item tries
3264:
3265: The total number of tries for the students
3266:
3267: =item max_tries
3268:
3269: The maximum number of tries taken
3270:
3271: =item mean_tries
3272:
3273: The average number of tries
3274:
3275: =item num_solved T
3276:
3277: he number of students able to solve the problem
3278:
3279: =item num_override
3280:
3281: The number of students whose answer is 'correct_by_override'
3282:
3283: =item deg_of_diff
3284:
3285: The degree of difficulty of the problem
3286:
3287: =item std_tries
3288:
3289: The standard deviation of the number of tries
3290:
3291: =item skew_tries
3292:
3293: The skew of the number of tries
3294:
3295: =item per_wrong
3296:
3297: The number of students attempting the problem who were not
3298: able to answer it correctly.
3299:
3300: =back
3301:
3302: =item C<&populate_weight_table()>
3303:
3304: =item C<&limit_by_start_end_times()>
3305:
3306: Build SQL WHERE condition which limits the data collected by the start
3307: and end times provided
3308:
3309: Inputs: $starttime, $endtime, $table
3310:
3311: Returns: $time_limits
3312:
3313:
1.197 raeburn 3314: =item C<&limit_by_section_and_status()C>
1.190 jms 3315:
3316: Build SQL WHERE condition which limits the data collected by section and
3317: student status.
3318:
3319: Inputs: $Sections (array ref)
3320: $enrollment (string: 'any', 'expired', 'active')
3321: $tablename The name of the table that holds the student data
3322:
3323: Returns: $student_requirements,$enrollment_requirements
3324:
3325: =item C<&limit_by_group()>
3326:
3327: Build SQL LEFT JOIN statement to include students_groups and groupnames tables and SQL WHERE condition which limits the data collected by group.
3328:
3329: Inputs: $Groups (array ref)
3330: $stutable The name of the table which holds the student data.
3331: $grptable The name of the table which maps group_id to groupname.
3332: $stugrptab The name of the table which holds student group affiliations.
3333: Returns: $groups_join,$group_limits
3334: $groups_join JOIN part of SQL statement (to include group related tables)
3335: $group_limits SQL WHERE condition limiting to requested groups
3336:
3337: =item C<rank_students_by_scores_on_resources()>
3338:
3339: Inputs:
3340: $resources: array ref of hash ref. Each hash ref needs key 'symb'.
3341: $Sections: array ref of sections to include,
3342: $Groups: array ref of groups to include.
3343: $enrollment: string,
3344: $courseid (may be omitted)
3345: $starttime (may be omitted)
3346: $endtime (may be omitted)
3347: $has_award_for (may be omitted)
3348:
3349: Returns; An array of arrays. The sub arrays contain a student name and
3350: their score on the resources. $starttime and $endtime constrain the
3351: list to awards obtained during the given time limits. $has_score_on
3352: constrains the list to those students who at least attempted the
3353: resource identified by the given symb, which is used to filter out
3354: such students for statistics that would be adversely affected by such
3355: students.
3356:
3357: =item C<&get_sum_of_scores>
3358:
3359: Inputs: $resource (hash ref, needs {'symb'} key),
3360: $part, (the part id),
3361: $students (array ref, contents of array are scalars holding 'sname:sdom'),
3362: $courseid
3363:
3364: Returns: the sum of the score on the problem part over the students and the
3365: maximum possible value for the sum (taken from the weight table).
3366:
3367:
3368: =item C<&score_stats()>
3369:
3370: Inputs: $Sections, $enrollment, $symbs, $starttime,
3371: $endtime, $courseid
3372:
3373: $Sections, $enrollment, $starttime, $endtime, and $courseid are the same as
3374: elsewhere in this module.
3375: $symbs is an array ref of symbs
3376:
3377: Returns: minimum, maximum, mean, s.d., number of students, and maximum
3378: possible of student scores on the given resources
3379:
3380: =item C<&count_stats()>
3381:
3382: Inputs: $Sections, $Groups, $enrollment, $symbs, $starttime,
3383: $endtime, $courseid
3384:
3385: $Sections, $Groups $enrollment, $starttime, $endtime, and $courseid are the
3386: same as elsewhere in this module.
3387: $symbs is an array ref of symbs
3388:
3389: Returns: minimum, maximum, mean, s.d., and number of students
3390: of the number of items correct on the given resources
3391:
3392: =item C<get_student_data()>
3393:
3394: =item C<&get_student_scores($Sections,$Groups,$Symbs,$enrollment,$courseid)>
3395:
3396: =item C<&setup_table_names()>
3397:
3398: input: course id
3399:
3400: output: none
3401:
3402: =back
3403:
3404: =head3 End of Local Data Caching Subroutines
3405:
3406: =head3 Classlist Subroutines
3407:
3408: =over
3409:
3410: =item &get_classlist();
3411:
3412: Retrieve the classist of a given class or of the current class. Student
3413: information is returned from the classlist.db file and, if needed,
3414: from the students environment.
3415:
3416: Optional arguments are $cdom, and $cnum (course domain,
3417: and course number, respectively). If either is ommitted the course
3418: will be taken from the current environment ($env{'request.course.id'},
3419: $env{'course.'.$cid.'.domain'}, and $env{'course.'.$cid.'.num'}).
3420:
3421: Returns a reference to a hash which contains:
3422: keys '$sname:$sdom'
1.194 raeburn 3423: values [$sdom,$sname,$end,$start,$id,$section,$fullname,$status,$type,
1.199 raeburn 3424: $lockedtype,$credits,$instsec]
1.190 jms 3425:
3426: The constant values CL_SDOM, CL_SNAME, CL_END, etc. can be used
3427: as indices into the returned list to future-proof clients against
3428: changes in the list order.
3429:
3430: =back
3431:
3432: =cut
3433:
3434:
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