File:
[LON-CAPA] /
loncom /
interface /
loncoursedata.pm
Revision
1.190:
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Thu Nov 20 21:22:21 2008 UTC (15 years, 5 months ago) by
jms
Branches:
MAIN
CVS tags:
version_2_9_X,
version_2_9_99_0,
version_2_9_1,
version_2_9_0,
version_2_8_99_1,
version_2_8_99_0,
version_2_10_0_RC2,
version_2_10_0_RC1,
version_2_10_0,
bz6209-base,
bz6209,
bz5969,
bz2851,
PRINT_INCOMPLETE_base,
PRINT_INCOMPLETE,
HEAD,
GCI_3,
GCI_2,
BZ5971-printing-apage,
BZ5434-fox
Reworked a lot of the POD comments
1: # The LearningOnline Network with CAPA
2: #
3: # $Id: loncoursedata.pm,v 1.190 2008/11/20 21:22:21 jms Exp $
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:
32: Apache::loncoursedata
33:
34: =head1 SYNOPSIS
35:
36: Set of functions that download and process student and course information.
37:
38: =head1 PACKAGES USED
39:
40: Apache::lonnet
41: Apache::longroup
42: Time::HiRes
43: Apache::lonmysql
44: LONCAPA
45: Digest::MD5
46:
47: =cut
48:
49: package Apache::loncoursedata;
50:
51: use strict;
52: use Apache::lonnet;
53: use Apache::longroup();
54: use Time::HiRes();
55: use Apache::lonmysql();
56: use LONCAPA;
57: use Digest::MD5();
58:
59: sub make_into_hash {
60: my $values = shift;
61: my %tmp = map { &unescape($_); } split(':',$values);
62: return \%tmp;
63: }
64:
65:
66: { # Begin scope of table identifiers
67:
68: my $current_course ='';
69: my $symb_table;
70: my $part_table;
71: my $student_table;
72: my $groupnames_table;
73: my $students_groups_table;
74: my $performance_table;
75: my $parameters_table;
76: my $fulldump_response_table;
77: my $fulldump_part_table;
78: my $fulldump_timestamp_table;
79: my $weight_table;
80:
81: my @Tables;
82:
83:
84:
85: sub init_dbs {
86: my ($courseid,$drop) = @_;
87: &setup_table_names($courseid);
88: #
89: # Drop any of the existing tables
90: if ($drop) {
91: foreach my $table (@Tables) {
92: &Apache::lonmysql::drop_table($table);
93: }
94: }
95: #
96: # Note - changes to this table must be reflected in the code that
97: # stores the data (calls &Apache::lonmysql::store_row with this table
98: # id
99: my $symb_table_def = {
100: id => $symb_table,
101: permanent => 'no',
102: columns => [{ name => 'symb_id',
103: type => 'MEDIUMINT UNSIGNED',
104: restrictions => 'NOT NULL',
105: auto_inc => 'yes', },
106: { name => 'symb',
107: type => 'MEDIUMTEXT',
108: restrictions => 'NOT NULL'},
109: ],
110: 'PRIMARY KEY' => ['symb_id'],
111: };
112: #
113: my $part_table_def = {
114: id => $part_table,
115: permanent => 'no',
116: columns => [{ name => 'part_id',
117: type => 'MEDIUMINT UNSIGNED',
118: restrictions => 'NOT NULL',
119: auto_inc => 'yes', },
120: { name => 'part',
121: type => 'VARCHAR(100) BINARY',
122: restrictions => 'NOT NULL'},
123: ],
124: 'PRIMARY KEY' => ['part (100)'],
125: 'KEY' => [{ columns => ['part_id']},],
126: };
127: #
128: my $student_table_def = {
129: id => $student_table,
130: permanent => 'no',
131: columns => [{ name => 'student_id',
132: type => 'MEDIUMINT UNSIGNED',
133: restrictions => 'NOT NULL',
134: auto_inc => 'yes', },
135: { name => 'student',
136: type => 'VARCHAR(100) BINARY',
137: restrictions => 'NOT NULL UNIQUE'},
138: { name => 'section',
139: type => 'VARCHAR(100) BINARY',
140: restrictions => 'NOT NULL'},
141: { name => 'start',
142: type => 'INT',
143: restrictions => 'NOT NULL'},
144: { name => 'end',
145: type => 'INT',
146: restrictions => 'NOT NULL'},
147: { name => 'classification',
148: type => 'VARCHAR(100) BINARY', },
149: { name => 'updatetime',
150: type => 'INT UNSIGNED'},
151: { name => 'fullupdatetime',
152: type => 'INT UNSIGNED'},
153: ],
154: 'PRIMARY KEY' => ['student_id'],
155: 'KEY' => [{ columns => ['student (100)',
156: 'section (100)',
157: 'start',
158: 'end']},],
159: };
160: #
161: my $groupnames_table_def = {
162: id => $groupnames_table,
163: permanent => 'no',
164: columns => [{ name => 'group_id',
165: type => 'MEDIUMINT UNSIGNED',
166: restrictions => 'NOT NULL',
167: auto_inc => 'yes', },
168: { name => 'groupname',
169: type => 'VARCHAR(100) BINARY',
170: restrictions => 'NOT NULL UNIQUE'},
171: ],
172: 'PRIMARY KEY' => ['group_id'],
173: 'KEY' => [{ columns => ['groupname (100)',]},],
174: };
175: #
176: my $students_groups_table_def = {
177: id => $students_groups_table,
178: permanent => 'no',
179: columns => [{ name => 'student_id',
180: type => 'MEDIUMINT UNSIGNED',
181: restrictions => 'NOT NULL', },
182: { name => 'group_id',
183: type => 'MEDIUMINT UNSIGNED',
184: restrictions => 'NOT NULL', },
185: ],
186: 'PRIMARY KEY' => ['student_id','group_id'],
187: 'KEY' => [{ columns => ['student_id'] },
188: { columns => ['group_id'] },],
189: };
190: #
191: my $performance_table_def = {
192: id => $performance_table,
193: permanent => 'no',
194: columns => [{ name => 'symb_id',
195: type => 'MEDIUMINT UNSIGNED',
196: restrictions => 'NOT NULL' },
197: { name => 'student_id',
198: type => 'MEDIUMINT UNSIGNED',
199: restrictions => 'NOT NULL' },
200: { name => 'part_id',
201: type => 'MEDIUMINT UNSIGNED',
202: restrictions => 'NOT NULL' },
203: { name => 'part',
204: type => 'VARCHAR(100) BINARY',
205: restrictions => 'NOT NULL'},
206: { name => 'solved',
207: type => 'TINYTEXT' },
208: { name => 'tries',
209: type => 'SMALLINT UNSIGNED' },
210: { name => 'awarded',
211: type => 'REAL' },
212: { name => 'award',
213: type => 'TINYTEXT' },
214: { name => 'awarddetail',
215: type => 'TINYTEXT' },
216: { name => 'timestamp',
217: type => 'INT UNSIGNED'},
218: ],
219: 'PRIMARY KEY' => ['symb_id','student_id','part_id'],
220: 'KEY' => [{ columns=>['student_id'] },
221: { columns=>['symb_id'] },],
222: };
223: #
224: my $fulldump_part_table_def = {
225: id => $fulldump_part_table,
226: permanent => 'no',
227: columns => [
228: { name => 'symb_id',
229: type => 'MEDIUMINT UNSIGNED',
230: restrictions => 'NOT NULL' },
231: { name => 'part_id',
232: type => 'MEDIUMINT UNSIGNED',
233: restrictions => 'NOT NULL' },
234: { name => 'student_id',
235: type => 'MEDIUMINT UNSIGNED',
236: restrictions => 'NOT NULL' },
237: { name => 'transaction',
238: type => 'MEDIUMINT UNSIGNED',
239: restrictions => 'NOT NULL' },
240: { name => 'tries',
241: type => 'SMALLINT UNSIGNED',
242: restrictions => 'NOT NULL' },
243: { name => 'award',
244: type => 'TINYTEXT' },
245: { name => 'awarded',
246: type => 'REAL' },
247: { name => 'previous',
248: type => 'SMALLINT UNSIGNED' },
249: # { name => 'regrader',
250: # type => 'TINYTEXT' },
251: # { name => 'afterduedate',
252: # type => 'TINYTEXT' },
253: ],
254: 'PRIMARY KEY' => ['symb_id','part_id','student_id','transaction'],
255: 'KEY' => [
256: { columns=>['symb_id'] },
257: { columns=>['part_id'] },
258: { columns=>['student_id'] },
259: ],
260: };
261: #
262: my $fulldump_response_table_def = {
263: id => $fulldump_response_table,
264: permanent => 'no',
265: columns => [
266: { name => 'symb_id',
267: type => 'MEDIUMINT UNSIGNED',
268: restrictions => 'NOT NULL' },
269: { name => 'part_id',
270: type => 'MEDIUMINT UNSIGNED',
271: restrictions => 'NOT NULL' },
272: { name => 'response_id',
273: type => 'MEDIUMINT UNSIGNED',
274: restrictions => 'NOT NULL' },
275: { name => 'student_id',
276: type => 'MEDIUMINT UNSIGNED',
277: restrictions => 'NOT NULL' },
278: { name => 'transaction',
279: type => 'MEDIUMINT UNSIGNED',
280: restrictions => 'NOT NULL' },
281: { name => 'awarddetail',
282: type => 'TINYTEXT' },
283: # { name => 'message',
284: # type => 'CHAR BINARY'},
285: { name => 'response_specific',
286: type => 'TINYTEXT' },
287: { name => 'response_specific_value',
288: type => 'TINYTEXT' },
289: { name => 'response_specific_2',
290: type => 'TINYTEXT' },
291: { name => 'response_specific_value_2',
292: type => 'TINYTEXT' },
293: { name => 'submission',
294: type => 'TEXT'},
295: ],
296: 'PRIMARY KEY' => ['symb_id','part_id','response_id','student_id',
297: 'transaction'],
298: 'KEY' => [
299: { columns=>['symb_id'] },
300: { columns=>['part_id','response_id'] },
301: { columns=>['student_id'] },
302: ],
303: };
304: my $fulldump_timestamp_table_def = {
305: id => $fulldump_timestamp_table,
306: permanent => 'no',
307: columns => [
308: { name => 'symb_id',
309: type => 'MEDIUMINT UNSIGNED',
310: restrictions => 'NOT NULL' },
311: { name => 'student_id',
312: type => 'MEDIUMINT UNSIGNED',
313: restrictions => 'NOT NULL' },
314: { name => 'transaction',
315: type => 'MEDIUMINT UNSIGNED',
316: restrictions => 'NOT NULL' },
317: { name => 'timestamp',
318: type => 'INT UNSIGNED'},
319: ],
320: 'PRIMARY KEY' => ['symb_id','student_id','transaction'],
321: 'KEY' => [
322: { columns=>['symb_id'] },
323: { columns=>['student_id'] },
324: { columns=>['transaction'] },
325: ],
326: };
327: #
328: my $parameters_table_def = {
329: id => $parameters_table,
330: permanent => 'no',
331: columns => [{ name => 'symb_id',
332: type => 'MEDIUMINT UNSIGNED',
333: restrictions => 'NOT NULL' },
334: { name => 'student_id',
335: type => 'MEDIUMINT UNSIGNED',
336: restrictions => 'NOT NULL' },
337: { name => 'parameter',
338: type => 'TINYTEXT',
339: restrictions => 'NOT NULL' },
340: { name => 'value',
341: type => 'MEDIUMTEXT' },
342: ],
343: 'PRIMARY KEY' => ['symb_id','student_id','parameter (255)'],
344: };
345: #
346: my $weight_table_def = {
347: id => $weight_table,
348: permanent => 'no',
349: columns => [{ name => 'symb_id',
350: type => 'MEDIUMINT UNSIGNED',
351: restrictions => 'NOT NULL' },
352: { name => 'part_id',
353: type => 'MEDIUMINT UNSIGNED',
354: restrictions => 'NOT NULL' },
355: { name => 'weight',
356: type => 'REAL',
357: restrictions => 'NOT NULL' },
358: ],
359: 'PRIMARY KEY' => ['symb_id','part_id'],
360: };
361: #
362: # Create the tables
363: my $tableid;
364: $tableid = &Apache::lonmysql::create_table($symb_table_def);
365: if (! defined($tableid)) {
366: &Apache::lonnet::logthis("error creating symb_table: ".
367: &Apache::lonmysql::get_error());
368: return 1;
369: }
370: #
371: $tableid = &Apache::lonmysql::create_table($part_table_def);
372: if (! defined($tableid)) {
373: &Apache::lonnet::logthis("error creating part_table: ".
374: &Apache::lonmysql::get_error());
375: return 2;
376: }
377: #
378: $tableid = &Apache::lonmysql::create_table($student_table_def);
379: if (! defined($tableid)) {
380: &Apache::lonnet::logthis("error creating student_table: ".
381: &Apache::lonmysql::get_error());
382: return 3;
383: }
384: #
385: $tableid = &Apache::lonmysql::create_table($performance_table_def);
386: if (! defined($tableid)) {
387: &Apache::lonnet::logthis("error creating preformance_table: ".
388: &Apache::lonmysql::get_error());
389: return 5;
390: }
391: #
392: $tableid = &Apache::lonmysql::create_table($parameters_table_def);
393: if (! defined($tableid)) {
394: &Apache::lonnet::logthis("error creating parameters_table: ".
395: &Apache::lonmysql::get_error());
396: return 6;
397: }
398: #
399: $tableid = &Apache::lonmysql::create_table($fulldump_part_table_def);
400: if (! defined($tableid)) {
401: &Apache::lonnet::logthis("error creating fulldump_part_table: ".
402: &Apache::lonmysql::get_error());
403: return 7;
404: }
405: #
406: $tableid = &Apache::lonmysql::create_table($fulldump_response_table_def);
407: if (! defined($tableid)) {
408: &Apache::lonnet::logthis("error creating fulldump_response_table: ".
409: &Apache::lonmysql::get_error());
410: return 8;
411: }
412: $tableid = &Apache::lonmysql::create_table($fulldump_timestamp_table_def);
413: if (! defined($tableid)) {
414: &Apache::lonnet::logthis("error creating fulldump_timestamp_table: ".
415: &Apache::lonmysql::get_error());
416: return 9;
417: }
418: $tableid = &Apache::lonmysql::create_table($weight_table_def);
419: if (! defined($tableid)) {
420: &Apache::lonnet::logthis("error creating weight_table: ".
421: &Apache::lonmysql::get_error());
422: return 10;
423: }
424: $tableid = &Apache::lonmysql::create_table($groupnames_table_def);
425: if (! defined($tableid)) {
426: &Apache::lonnet::logthis("error creating groupnames_table: ".
427: &Apache::lonmysql::get_error());
428: return 11;
429: }
430: $tableid = &Apache::lonmysql::create_table($students_groups_table_def);
431: if (! defined($tableid)) {
432: &Apache::lonnet::logthis("error creating student_groups_table: ".
433: &Apache::lonmysql::get_error());
434: return 12;
435: }
436: return 0;
437: }
438:
439:
440:
441: sub delete_caches {
442: my $courseid = shift;
443: $courseid = $env{'request.course.id'} if (! defined($courseid));
444: #
445: &setup_table_names($courseid);
446: #
447: my $dbh = &Apache::lonmysql::get_dbh();
448: foreach my $table (@Tables) {
449: my $command = 'DROP TABLE '.$table.';';
450: $dbh->do($command);
451: if ($dbh->err) {
452: &Apache::lonnet::logthis($command.' resulted in error: '.$dbh->errstr);
453: }
454: }
455: return;
456: }
457:
458:
459: my $have_read_part_table = 0;
460: my %ids_by_part;
461: my %parts_by_id;
462:
463: sub get_part_id {
464: my ($part) = @_;
465: $part = 0 if (! defined($part));
466: if (! $have_read_part_table) {
467: my @Result = &Apache::lonmysql::get_rows($part_table);
468: foreach (@Result) {
469: $ids_by_part{$_->[1]}=$_->[0];
470: }
471: $have_read_part_table = 1;
472: }
473: if (! exists($ids_by_part{$part})) {
474: &Apache::lonmysql::store_row($part_table,[undef,$part]);
475: undef(%ids_by_part);
476: my @Result = &Apache::lonmysql::get_rows($part_table);
477: foreach (@Result) {
478: $ids_by_part{$_->[1]}=$_->[0];
479: }
480: }
481: return $ids_by_part{$part} if (exists($ids_by_part{$part}));
482: return undef; # error
483: }
484:
485: sub get_part {
486: my ($part_id) = @_;
487: if (! exists($parts_by_id{$part_id}) ||
488: ! defined($parts_by_id{$part_id}) ||
489: $parts_by_id{$part_id} eq '') {
490: my @Result = &Apache::lonmysql::get_rows($part_table);
491: foreach (@Result) {
492: $parts_by_id{$_->[0]}=$_->[1];
493: }
494: }
495: return $parts_by_id{$part_id} if(exists($parts_by_id{$part_id}));
496: return undef; # error
497: }
498:
499:
500: my $have_read_symb_table = 0;
501: my %ids_by_symb;
502: my %symbs_by_id;
503:
504: sub get_symb_id {
505: my ($symb) = @_;
506: if (! $have_read_symb_table) {
507: my @Result = &Apache::lonmysql::get_rows($symb_table);
508: foreach (@Result) {
509: $ids_by_symb{$_->[1]}=$_->[0];
510: }
511: $have_read_symb_table = 1;
512: }
513: if (! exists($ids_by_symb{$symb})) {
514: &Apache::lonmysql::store_row($symb_table,[undef,$symb]);
515: undef(%ids_by_symb);
516: my @Result = &Apache::lonmysql::get_rows($symb_table);
517: foreach (@Result) {
518: $ids_by_symb{$_->[1]}=$_->[0];
519: }
520: }
521: return $ids_by_symb{$symb} if(exists( $ids_by_symb{$symb}));
522: return undef; # error
523: }
524:
525: sub get_symb {
526: my ($symb_id) = @_;
527: if (! exists($symbs_by_id{$symb_id}) ||
528: ! defined($symbs_by_id{$symb_id}) ||
529: $symbs_by_id{$symb_id} eq '') {
530: my @Result = &Apache::lonmysql::get_rows($symb_table);
531: foreach (@Result) {
532: $symbs_by_id{$_->[0]}=$_->[1];
533: }
534: }
535: return $symbs_by_id{$symb_id} if(exists( $symbs_by_id{$symb_id}));
536: return undef; # error
537: }
538:
539: my $have_read_student_table = 0;
540: my %ids_by_student;
541: my %students_by_id;
542:
543: sub get_student_id {
544: my ($sname,$sdom) = @_;
545: my $student = $sname.':'.$sdom;
546: if (! $have_read_student_table) {
547: my @Result = &Apache::lonmysql::get_rows($student_table);
548: foreach (@Result) {
549: $ids_by_student{$_->[1]}=$_->[0];
550: }
551: $have_read_student_table = 1;
552: }
553: if (! exists($ids_by_student{$student})) {
554: &populate_student_table();
555: undef(%ids_by_student);
556: undef(%students_by_id);
557: my @Result = &Apache::lonmysql::get_rows($student_table);
558: foreach (@Result) {
559: $ids_by_student{$_->[1]}=$_->[0];
560: }
561: }
562: return $ids_by_student{$student} if(exists( $ids_by_student{$student}));
563: return undef; # error
564: }
565:
566: sub get_student {
567: my ($student_id) = @_;
568: if (! exists($students_by_id{$student_id}) ||
569: ! defined($students_by_id{$student_id}) ||
570: $students_by_id{$student_id} eq '') {
571: my @Result = &Apache::lonmysql::get_rows($student_table);
572: foreach (@Result) {
573: $students_by_id{$_->[0]}=$_->[1];
574: }
575: }
576: return $students_by_id{$student_id} if(exists($students_by_id{$student_id}));
577: return undef; # error
578: }
579:
580: sub populate_student_table {
581: my ($courseid) = @_;
582: if (! defined($courseid)) {
583: $courseid = $env{'request.course.id'};
584: }
585: #
586: &setup_table_names($courseid);
587: &init_dbs($courseid,0);
588: my $dbh = &Apache::lonmysql::get_dbh();
589: my $request = 'INSERT IGNORE INTO '.$student_table.
590: "(student,section,start,end) VALUES ";
591: my $cdom = $env{'course.'.$courseid.'.domain'};
592: my $cnum = $env{'course.'.$courseid.'.num'};
593: my $classlist = &get_classlist($cdom,$cnum);
594: my $student_count=0;
595: while (my ($student,$data) = each %$classlist) {
596: my ($section,$start,$end) = ($data->[&CL_SECTION()],
597: $data->[&CL_START()],
598: $data->[&CL_END()]);
599: if ($section eq '' || $section =~ /^\s*$/) {
600: $section = 'none';
601: }
602: if (!defined($start)) { $start = 0; }
603: if (!defined($end)) { $end = 0; }
604: $request .= "('".$student."','".$section."','".$start."','".$end."'),";
605: $student_count++;
606: }
607: return if ($student_count == 0);
608: chop($request);
609: $dbh->do($request);
610: if ($dbh->err()) {
611: &Apache::lonnet::logthis("error ".$dbh->errstr().
612: " occurred executing \n".
613: $request);
614: }
615: return;
616: }
617:
618: my $have_read_groupnames_table = 0;
619: my %ids_by_groupname;
620:
621: sub get_group_id {
622: my ($groupname) = @_;
623: if (! $have_read_groupnames_table) {
624: my @Result = &Apache::lonmysql::get_rows($groupnames_table);
625: foreach (@Result) {
626: $ids_by_groupname{$_->[1]}=$_->[0];
627: }
628: $have_read_groupnames_table = 1;
629: }
630: if (! exists($ids_by_groupname{$groupname})) {
631: &populate_groupnames_table();
632: undef(%ids_by_groupname);
633: my @Result = &Apache::lonmysql::get_rows($groupnames_table);
634: foreach (@Result) {
635: $ids_by_groupname{$_->[1]}=$_->[0];
636: }
637: }
638: if (exists($ids_by_groupname{$groupname})) {
639: return $ids_by_groupname{$groupname};
640: }
641: return undef; # error
642: }
643:
644: sub populate_groupnames_table {
645: my ($courseid) = @_;
646: if (! defined($courseid)) {
647: $courseid = $env{'request.course.id'};
648: }
649: &setup_table_names($courseid);
650: &init_dbs($courseid,0);
651: my $dbh = &Apache::lonmysql::get_dbh();
652: my $cdom = $env{'course.'.$courseid.'.domain'};
653: my $cnum = $env{'course.'.$courseid.'.num'};
654: my %curr_groups = &Apache::longroup::coursegroups($cdom,$cnum);
655: return if (!%curr_groups);
656: my $request = 'INSERT IGNORE INTO '.$groupnames_table.
657: '(groupname) VALUES ';
658: foreach my $groupname (sort(keys(%curr_groups)),'none') {
659: $request .= "('".$groupname."'),";
660: }
661: chop($request);
662: $dbh->do($request);
663: if ($dbh->err()) {
664: &Apache::lonnet::logthis("error ".$dbh->errstr().
665: " occurred executing \n".
666: $request);
667: }
668: return;
669: }
670:
671: my $have_read_studentsgroups_table = 0;
672: my %groupids_by_studentid;
673:
674: sub get_students_groupids {
675: my ($student_id) = @_;
676: if (! $have_read_studentsgroups_table) {
677: my @Result = &Apache::lonmysql::get_rows($students_groups_table);
678: foreach (@Result) {
679: push(@{$groupids_by_studentid{$_->[0]}},$_->[1]);
680: }
681: $have_read_studentsgroups_table = 1;
682: }
683: if (! exists($groupids_by_studentid{$student_id})) {
684: &populate_students_groups_table();
685: undef(%groupids_by_studentid);
686: my @Result = &Apache::lonmysql::get_rows($students_groups_table);
687: foreach (@Result) {
688: push(@{$groupids_by_studentid{$_->[0]}},$_->[1]);
689: }
690: }
691: if (exists($groupids_by_studentid{$student_id})) {
692: if (ref($groupids_by_studentid{$student_id}) eq 'ARRAY') {
693: return @{$groupids_by_studentid{$student_id}};
694: }
695: }
696: return undef; # error
697: }
698:
699:
700: sub populate_students_groups_table {
701: my ($courseid) = @_;
702: if (! defined($courseid)) {
703: $courseid = $env{'request.course.id'};
704: }
705: #
706: &setup_table_names($courseid);
707: &init_dbs($courseid,0);
708: my $dbh = &Apache::lonmysql::get_dbh();
709: my $request = 'INSERT IGNORE INTO '.$students_groups_table.
710: "(student_id,group_id) VALUES ";
711: my $cdom = $env{'course.'.$courseid.'.domain'};
712: my $cnum = $env{'course.'.$courseid.'.num'};
713: my ($classlist,$keylist) = &get_classlist($cdom,$cnum);
714: my ($classgroups,$studentgroups) = &get_group_memberships($classlist,
715: $keylist,
716: $cdom,$cnum);
717: my $record_count = 0;
718: foreach my $student (sort(keys(%{$classgroups}))) {
719: my $student_id = &get_student_id(split(':',$student));
720: my @studentsgroups = &get_students_groups($student,'Active',$classgroups);
721: if (@studentsgroups < 1) {
722: @studentsgroups = ('none');
723: }
724: foreach my $groupname (@studentsgroups) {
725: my $group_id = &get_group_id($groupname);
726: $request .= "('".$student_id."','".$group_id."'),";
727: $record_count++;
728: }
729: }
730: return if ($record_count == 0);
731: chop($request);
732: $dbh->do($request);
733: if ($dbh->err()) {
734: &Apache::lonnet::logthis("error ".$dbh->errstr().
735: " occurred executing \n".
736: $request);
737: }
738: return;
739: }
740:
741: sub clear_internal_caches {
742: $have_read_part_table = 0;
743: undef(%ids_by_part);
744: undef(%parts_by_id);
745: $have_read_symb_table = 0;
746: undef(%ids_by_symb);
747: undef(%symbs_by_id);
748: $have_read_student_table = 0;
749: undef(%ids_by_student);
750: undef(%students_by_id);
751: $have_read_groupnames_table = 0;
752: undef(%ids_by_groupname);
753: }
754:
755: sub symb_is_for_task {
756: my ($symb) = @_;
757: return ($symb =~ /\.task$/);
758: }
759:
760:
761: sub update_full_student_data {
762: my ($sname,$sdom,$courseid) = @_;
763: #
764: # Set up database names
765: &setup_table_names($courseid);
766: #
767: my $student_id = &get_student_id($sname,$sdom);
768: my $student = $sname.':'.$sdom;
769: #
770: my $returnstatus = 'okay';
771: #
772: # Download students data
773: my $time_of_retrieval = time;
774: my @tmp = &Apache::lonnet::dumpstore($courseid,$sdom,$sname);
775: if (@tmp && $tmp[0] =~ /^error/) {
776: $returnstatus = 'error retrieving full student data';
777: return $returnstatus;
778: } elsif (! @tmp) {
779: $returnstatus = 'okay: no student data';
780: return $returnstatus;
781: }
782: my %studentdata = @tmp;
783: #
784: # Get database handle and clean out the tables
785: my $dbh = &Apache::lonmysql::get_dbh();
786: $dbh->do('DELETE FROM '.$fulldump_response_table.' WHERE student_id='.
787: $student_id);
788: $dbh->do('DELETE FROM '.$fulldump_part_table.' WHERE student_id='.
789: $student_id);
790: $dbh->do('DELETE FROM '.$fulldump_timestamp_table.' WHERE student_id='.
791: $student_id);
792: #
793: # Parse and store the data into a form we can handle
794: my $partdata;
795: my $respdata;
796: while (my ($key,$value) = each(%studentdata)) {
797: next if ($key =~ /^(\d+):(resource$|subnum$|keys:)/);
798: my ($transaction,$symb,$parameter) = split(':',$key);
799: $symb = &unescape($symb);
800: $parameter = &unescape($parameter);
801: my $symb_id = &get_symb_id($symb);
802: if ($parameter eq 'timestamp') {
803: # We can deal with 'timestamp' right away
804: my @timestamp_storage = ($symb_id,$student_id,
805: $transaction,$value);
806: my $store_command = 'INSERT IGNORE INTO '.$fulldump_timestamp_table.
807: " VALUES ('".join("','",@timestamp_storage)."');";
808: $dbh->do($store_command);
809: if ($dbh->err()) {
810: &Apache::lonnet::logthis('unable to execute '.$store_command);
811: &Apache::lonnet::logthis($dbh->errstr());
812: }
813: next;
814: } elsif ($parameter eq 'version') {
815: next;
816: } elsif (&symb_is_for_task($symb)) {
817: next if ($parameter !~ /^resource\.(.*)\.(award|
818: awarded|
819: solved|
820: submission|
821: portfiles|
822: status|
823: version|
824: regrader)\s*$/x);
825: my ($version_and_part_id, $field) = ($1,$2);
826:
827: next if ($version_and_part_id !~ /\./
828: && $field ne 'regrader' && $field ne 'version');
829:
830: my ($version, $part, $instance) =
831: split(/\./,$version_and_part_id);
832:
833: #skip and instance dimension or criteria specific data
834: next if (defined($instance)
835: && $instance ne $field
836: && $instance ne 'bridgetask');
837:
838: if (!defined($part)) {
839: $part = $version;
840: }
841: my $resp_id = &get_part_id('0');
842: my $part_id = &get_part_id($part);
843:
844: if ($field eq 'version') {
845: # for tasks each version is an attempt at it thus
846: # version -> tries
847: $partdata->{$symb_id}{$part_id}{$transaction}{'tries'}=
848: $value;
849: # at new version time the record gets reset thus adding a
850: # virtual response awarddetail of 'new_version'
851: $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific'}='status';
852: $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific_value'}='new_version';
853:
854: } elsif ($field eq 'award' || $field eq 'awarded'
855: || $field eq 'solved') {
856: $partdata->{$symb_id}{$part_id}{$transaction}{$field}=
857: $value;
858: } elsif ($field eq 'portfiles') {
859: # tasks only accepts portfolio submissions
860: $value = $dbh->quote($value);
861: $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'submission'}=$value;
862: } elsif ($field eq 'status') {
863: $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific'}=$field;
864: $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific_value'}=$value;
865: } elsif ($field eq 'regrader') {
866: $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific_2'}=$field;
867: $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific_value_2'}=$value;
868: }
869: } elsif ($parameter =~ /^resource\.(.*)\.(tries|
870: award|
871: awarded|
872: previous|
873: solved|
874: awarddetail|
875: submission|
876: submissiongrading|
877: molecule)\s*$/x){
878: # we do not have enough information to store an
879: # entire row, so we save it up until later.
880: my ($part_and_resp_id,$field) = ($1,$2);
881: my ($part,$part_id,$resp,$resp_id);
882: if ($part_and_resp_id =~ /\./) {
883: ($part,$resp) = split(/\./,$part_and_resp_id);
884: $part_id = &get_part_id($part);
885: $resp_id = &get_part_id($resp);
886: } else {
887: $part_id = &get_part_id($part_and_resp_id);
888: }
889: # Deal with part specific data
890: if ($field =~ /^(tries|award|awarded|previous)$/) {
891: $partdata->{$symb_id}->{$part_id}->{$transaction}->{$field}=$value;
892: }
893: # deal with response specific data
894: if (defined($resp_id) &&
895: $field =~ /^(awarddetail|
896: submission|
897: submissiongrading|
898: molecule)$/x) {
899: if ($field eq 'submission') {
900: # We have to be careful with user supplied input.
901: # most of the time we are okay because it is escaped.
902: # However, there is one wrinkle: submissions which end in
903: # and odd number of '\' cause insert errors to occur.
904: # Best trap this somehow...
905: $value = $dbh->quote($value);
906: }
907: if ($field eq 'submissiongrading' ||
908: $field eq 'molecule') {
909: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific'}=$field;
910: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific_value'}=$value;
911: } else {
912: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{$field}=$value;
913: }
914: }
915: }
916: }
917: ##
918: ## Store the part data
919: my $store_command = 'INSERT IGNORE INTO '.$fulldump_part_table.
920: ' VALUES '."\n";
921: my $store_rows = 0;
922: while (my ($symb_id,$hash1) = each (%$partdata)) {
923: while (my ($part_id,$hash2) = each (%$hash1)) {
924: while (my ($transaction,$data) = each (%$hash2)) {
925: $store_command .= "('".join("','",$symb_id,$part_id,
926: $student_id,
927: $transaction,
928: $data->{'tries'},
929: $data->{'award'},
930: $data->{'awarded'},
931: $data->{'previous'})."'),";
932: $store_rows++;
933: }
934: }
935: }
936: if ($store_rows) {
937: chop($store_command);
938: $dbh->do($store_command);
939: if ($dbh->err) {
940: $returnstatus = 'error saving part data';
941: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
942: &Apache::lonnet::logthis("While attempting\n".$store_command);
943: }
944: }
945: ##
946: ## Store the response data
947: $store_command = 'INSERT IGNORE INTO '.$fulldump_response_table.
948: ' VALUES '."\n";
949: $store_rows = 0;
950: while (my ($symb_id,$hash1) = each (%$respdata)) {
951: while (my ($part_id,$hash2) = each (%$hash1)) {
952: while (my ($resp_id,$hash3) = each (%$hash2)) {
953: while (my ($transaction,$data) = each (%$hash3)) {
954: my $submission = $data->{'submission'};
955: # We have to be careful with user supplied input.
956: # most of the time we are okay because it is escaped.
957: # However, there is one wrinkle: submissions which end in
958: # and odd number of '\' cause insert errors to occur.
959: # Best trap this somehow...
960: $submission = $dbh->quote($submission);
961: $store_command .= "('".
962: join("','",$symb_id,$part_id,
963: $resp_id,$student_id,
964: $transaction,
965: $data->{'awarddetail'},
966: $data->{'response_specific'},
967: $data->{'response_specific_value'},
968: $data->{'response_specific_2'},
969: $data->{'response_specific_value_2'}).
970: "',".$submission."),";
971: $store_rows++;
972: }
973: }
974: }
975: }
976: if ($store_rows) {
977: chop($store_command);
978: $dbh->do($store_command);
979: if ($dbh->err) {
980: $returnstatus = 'error saving response data';
981: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
982: &Apache::lonnet::logthis("While attempting\n".$store_command);
983: }
984: }
985: ##
986: ## Update the students "current" data in the performance
987: ## and parameters tables.
988: my ($status,undef) = &store_student_data
989: ($sname,$sdom,$courseid,
990: &Apache::lonnet::convert_dump_to_currentdump(\%studentdata));
991: if ($returnstatus eq 'okay' && $status ne 'okay') {
992: $returnstatus = 'error saving current data:'.$status;
993: } elsif ($status ne 'okay') {
994: $returnstatus .= ' error saving current data:'.$status;
995: }
996: ##
997: ## Update the students time......
998: if ($returnstatus eq 'okay') {
999: &store_updatetime($student_id,$time_of_retrieval,$time_of_retrieval);
1000: if ($dbh->err) {
1001: if ($returnstatus eq 'okay') {
1002: $returnstatus = 'error updating student time';
1003: } else {
1004: $returnstatus = 'error updating student time';
1005: }
1006: }
1007: }
1008: return $returnstatus;
1009: }
1010:
1011:
1012: sub update_student_data {
1013: my ($sname,$sdom,$courseid) = @_;
1014: #
1015: # Set up database names
1016: &setup_table_names($courseid);
1017: #
1018: my $student_id = &get_student_id($sname,$sdom);
1019: my $student = $sname.':'.$sdom;
1020: #
1021: my $returnstatus = 'okay';
1022: #
1023: # Download students data
1024: my $time_of_retrieval = time;
1025: my %student_data = &Apache::lonnet::currentdump($courseid,$sdom,$sname);
1026: if (&Apache::lonnet::error(%student_data)) {
1027: &Apache::lonnet::logthis('error getting data for '.
1028: $sname.':'.$sdom.' in course '.$courseid.
1029: ':'.(%student_data)[0]);
1030: $returnstatus =(%student_data)[0] ;
1031: return ($returnstatus,undef);
1032: }
1033: if (scalar(keys(%student_data)) < 1) {
1034: return ('no data',undef);
1035: }
1036: my @Results = &store_student_data($sname,$sdom,$courseid,\%student_data);
1037: #
1038: # Set the students update time
1039: if ($Results[0] eq 'okay') {
1040: &store_updatetime($student_id,$time_of_retrieval);
1041: }
1042: #
1043: return @Results;
1044: }
1045:
1046: sub store_updatetime {
1047: my ($student_id,$updatetime,$fullupdatetime)=@_;
1048: my $values = '';
1049: if (defined($updatetime)) {
1050: $values = 'updatetime='.$updatetime.' ';
1051: }
1052: if (defined($fullupdatetime)) {
1053: if ($values ne '') {
1054: $values .= ',';
1055: }
1056: $values .= 'fullupdatetime='.$fullupdatetime.' ';
1057: }
1058: return if ($values eq '');
1059: my $dbh = &Apache::lonmysql::get_dbh();
1060: my $request = 'UPDATE '.$student_table.' SET '.$values.
1061: ' WHERE student_id='.$student_id.' LIMIT 1';
1062: $dbh->do($request);
1063: }
1064:
1065: sub store_student_data {
1066: my ($sname,$sdom,$courseid,$student_data) = @_;
1067: #
1068: my $student_id = &get_student_id($sname,$sdom);
1069: my $student = $sname.':'.$sdom;
1070: #
1071: my $returnstatus = 'okay';
1072: #
1073: # Remove all of the students data from the table
1074: my $dbh = &Apache::lonmysql::get_dbh();
1075: $dbh->do('DELETE FROM '.$performance_table.' WHERE student_id='.
1076: $student_id);
1077: $dbh->do('DELETE FROM '.$parameters_table.' WHERE student_id='.
1078: $student_id);
1079: #
1080: # Store away the data
1081: #
1082: my $starttime = Time::HiRes::time;
1083: my $elapsed = 0;
1084: my $rows_stored;
1085: my $store_parameters_command = 'INSERT IGNORE INTO '.$parameters_table.
1086: ' VALUES '."\n";
1087: my $num_parameters = 0;
1088: my $store_performance_command = 'INSERT IGNORE INTO '.$performance_table.
1089: ' VALUES '."\n";
1090: return ('error',undef) if (! defined($dbh));
1091: while (my ($current_symb,$param_hash) = each(%{$student_data})) {
1092: #
1093: # make sure the symb is set up properly
1094: my $symb_id = &get_symb_id($current_symb);
1095: #
1096: # Parameters
1097: while (my ($parameter,$value) = each(%$param_hash)) {
1098: if ($parameter !~ /(timestamp|resource\.(.*)\.(solved|tries|awarded|award|awarddetail|previous))/) {
1099: my $sql_parameter = "('".join("','",
1100: $symb_id,$student_id,
1101: $parameter)."',".
1102: $dbh->quote($value)."),\n";
1103: $num_parameters ++;
1104: if ($sql_parameter !~ /''/) {
1105: $store_parameters_command .= $sql_parameter;
1106: #$rows_stored++;
1107: }
1108: }
1109: }
1110: # Performance
1111: my %stored;
1112: while (my ($parameter,$value) = each(%$param_hash)) {
1113: next if ($parameter !~ /^resource\.(.*)\.(solved|awarded)$/);
1114: my $part = $1;
1115: my $which = $2;
1116: next if ($part =~ /\./);
1117: next if (exists($stored{$part}));
1118: $stored{$part}++;
1119: #
1120: my $part_id = &get_part_id($part);
1121: next if (!defined($part_id));
1122:
1123: my ($solved,$awarded);
1124: if ($which eq 'solved') {
1125: $solved = $value;
1126: $awarded = $param_hash->{'resource.'.$part.'.awarded'};
1127: } else {
1128: $solved = $param_hash->{'resource.'.$part.'.solved'};
1129: $awarded = $value;
1130: }
1131: my $award = $param_hash->{'resource.'.$part.'.award'};
1132: my $awarddetail = $param_hash->{'resource.'.$part.'.awarddetail'};
1133: my $timestamp = $param_hash->{'timestamp'};
1134: my $tries = $param_hash->{'resource.'.$part.'.tries'};
1135: if (&symb_is_for_task($current_symb)) {
1136: $tries = $param_hash->{'resource.'.$part.'.version'};
1137: }
1138: #
1139: $solved = '' if (! defined($solved));
1140: $tries = '' if (! defined($tries));
1141: $awarded = '' if (! defined($awarded));
1142: $award = '' if (! defined($award));
1143: $awarddetail = '' if (! defined($awarddetail));
1144: my $sql_performance =
1145: "('".join("','",$symb_id,$student_id,$part_id,$part,
1146: $solved,$tries,$awarded,$award,
1147: $awarddetail,$timestamp)."'),\n";
1148: $store_performance_command .= $sql_performance;
1149: $rows_stored++;
1150: }
1151: }
1152: if (! $rows_stored) { return ($returnstatus, undef); }
1153: $store_parameters_command =~ s|,\n$||;
1154: $store_performance_command =~ s|,\n$||;
1155: my $start = Time::HiRes::time;
1156: $dbh->do($store_performance_command);
1157: if ($dbh->err()) {
1158: &Apache::lonnet::logthis('performance bigass insert error:'.
1159: $dbh->errstr());
1160: &Apache::lonnet::logthis('command = '.$/.$store_performance_command);
1161: $returnstatus = 'error: unable to insert performance into database';
1162: return ($returnstatus,$student_data);
1163: }
1164: $dbh->do($store_parameters_command) if ($num_parameters>0);
1165: if ($dbh->err()) {
1166: &Apache::lonnet::logthis('parameters bigass insert error:'.
1167: $dbh->errstr());
1168: &Apache::lonnet::logthis('command = '.$/.$store_parameters_command);
1169: &Apache::lonnet::logthis('rows_stored = '.$rows_stored);
1170: &Apache::lonnet::logthis('student_id = '.$student_id);
1171: $returnstatus = 'error: unable to insert parameters into database';
1172: return ($returnstatus,$student_data);
1173: }
1174: $elapsed += Time::HiRes::time - $start;
1175: return ($returnstatus,$student_data);
1176: }
1177:
1178:
1179: sub ensure_tables_are_set_up {
1180: my ($courseid) = @_;
1181: $courseid = $env{'request.course.id'} if (! defined($courseid));
1182: #
1183: # Clean out package variables
1184: &setup_table_names($courseid);
1185: #
1186: # if the tables do not exist, make them
1187: my @CurrentTable = &Apache::lonmysql::tables_in_db();
1188: my ($found_symb,$found_student,$found_groups,$found_groupnames,$found_part,
1189: $found_performance,$found_parameters,$found_fulldump_part,
1190: $found_fulldump_response,$found_fulldump_timestamp,
1191: $found_weight);
1192: foreach (@CurrentTable) {
1193: $found_symb = 1 if ($_ eq $symb_table);
1194: $found_student = 1 if ($_ eq $student_table);
1195: $found_groups = 1 if ($_ eq $students_groups_table);
1196: $found_groupnames = 1 if ($_ eq $groupnames_table);
1197: $found_part = 1 if ($_ eq $part_table);
1198: $found_performance = 1 if ($_ eq $performance_table);
1199: $found_parameters = 1 if ($_ eq $parameters_table);
1200: $found_fulldump_part = 1 if ($_ eq $fulldump_part_table);
1201: $found_fulldump_response = 1 if ($_ eq $fulldump_response_table);
1202: $found_fulldump_timestamp = 1 if ($_ eq $fulldump_timestamp_table);
1203: $found_weight = 1 if ($_ eq $weight_table);
1204: }
1205: if (!$found_symb ||
1206: !$found_student || !$found_part ||
1207: !$found_performance || !$found_parameters ||
1208: !$found_fulldump_part || !$found_fulldump_response ||
1209: !$found_fulldump_timestamp || !$found_weight ) {
1210: if (&init_dbs($courseid,1)) {
1211: return 'error';
1212: }
1213: }
1214: }
1215:
1216: sub ensure_current_data {
1217: my ($sname,$sdom,$courseid) = @_;
1218: my $status = 'okay'; # return value
1219: #
1220: $courseid = $env{'request.course.id'} if (! defined($courseid));
1221: &ensure_tables_are_set_up($courseid);
1222: #
1223: # Get the update time for the user
1224: my $updatetime = 0;
1225: my $getuserdir = 1;
1226: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1227: ($sdom,$sname,$courseid.'.db',$getuserdir);
1228: #
1229: if ($modifiedtime == -1) {
1230: return ('no data',undef);
1231: }
1232:
1233: my $student_id = &get_student_id($sname,$sdom);
1234: my @Result = &Apache::lonmysql::get_rows($student_table,
1235: "student_id ='$student_id'");
1236: my $data = undef;
1237: if (@Result) {
1238: $updatetime = $Result[0]->[6]; # Ack! This is dumb!
1239: }
1240: if ($modifiedtime > $updatetime) {
1241: ($status,$data) = &update_student_data($sname,$sdom,$courseid);
1242: }
1243: return ($status,$data);
1244: }
1245:
1246:
1247: sub ensure_current_full_data {
1248: my ($sname,$sdom,$courseid) = @_;
1249: my $status = 'okay'; # return value
1250: #
1251: $courseid = $env{'request.course.id'} if (! defined($courseid));
1252: &ensure_tables_are_set_up($courseid);
1253: #
1254: # Get the update time for the user
1255: my $getuserdir = 1;
1256: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1257: ($sdom,$sname,$courseid.'.db',$getuserdir);
1258: #
1259: my $student_id = &get_student_id($sname,$sdom);
1260: my @Result = &Apache::lonmysql::get_rows($student_table,
1261: "student_id ='$student_id'");
1262: my $updatetime;
1263: if (@Result && ref($Result[0]) eq 'ARRAY') {
1264: $updatetime = $Result[0]->[7];
1265: }
1266: if (! defined($updatetime) || $modifiedtime > $updatetime) {
1267: $status = &update_full_student_data($sname,$sdom,$courseid);
1268: }
1269: return $status;
1270: }
1271:
1272:
1273: sub get_student_data_from_performance_cache {
1274: my ($sname,$sdom,$symb,$courseid)=@_;
1275: my $student = $sname.':'.$sdom if (defined($sname) && defined($sdom));
1276: &setup_table_names($courseid);
1277: #
1278: # Return hash
1279: my $studentdata;
1280: #
1281: my $dbh = &Apache::lonmysql::get_dbh();
1282: my $request = "SELECT ".
1283: "d.symb,a.part,a.solved,a.tries,a.awarded,a.award,a.awarddetail,".
1284: "a.timestamp ";
1285: if (defined($student)) {
1286: $request .= "FROM $student_table AS b ".
1287: "LEFT JOIN $performance_table AS a ON b.student_id=a.student_id ".
1288: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1289: "LEFT JOIN $symb_table AS d ON d.symb_id = a.symb_id ".
1290: "WHERE student='$student'";
1291: if (defined($symb) && $symb ne '') {
1292: $request .= " AND d.symb=".$dbh->quote($symb);
1293: }
1294: } elsif (defined($symb) && $symb ne '') {
1295: $request .= "FROM $symb_table as d ".
1296: "LEFT JOIN $performance_table AS a ON d.symb_id=a.symb_id ".
1297: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1298: "LEFT JOIN $student_table AS b ON b.student_id = a.student_id ".
1299: "WHERE symb='".$dbh->quote($symb)."'";
1300: }
1301: my $starttime = Time::HiRes::time;
1302: my $rows_retrieved = 0;
1303: my $sth = $dbh->prepare($request);
1304: $sth->execute();
1305: if ($sth->err()) {
1306: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1307: &Apache::lonnet::logthis("\n".$request."\n");
1308: &Apache::lonnet::logthis("error is:".$sth->errstr());
1309: return undef;
1310: }
1311: foreach my $row (@{$sth->fetchall_arrayref}) {
1312: $rows_retrieved++;
1313: my ($symb,$part,$solved,$tries,$awarded,$award,$awarddetail,$time) =
1314: (@$row);
1315: my $base = 'resource.'.$part;
1316: $studentdata->{$symb}->{$base.'.solved'} = $solved;
1317: $studentdata->{$symb}->{$base.'.tries'} = $tries;
1318: $studentdata->{$symb}->{$base.'.awarded'} = $awarded;
1319: $studentdata->{$symb}->{$base.'.award'} = $award;
1320: $studentdata->{$symb}->{$base.'.awarddetail'} = $awarddetail;
1321: $studentdata->{$symb}->{'timestamp'} = $time if (defined($time) && $time ne '');
1322: }
1323: ## Get misc parameters
1324: $request = 'SELECT c.symb,a.parameter,a.value '.
1325: "FROM $student_table AS b ".
1326: "LEFT JOIN $parameters_table AS a ON b.student_id=a.student_id ".
1327: "LEFT JOIN $symb_table AS c ON c.symb_id = a.symb_id ".
1328: "WHERE student='$student'";
1329: if (defined($symb) && $symb ne '') {
1330: $request .= " AND c.symb=".$dbh->quote($symb);
1331: }
1332: $sth = $dbh->prepare($request);
1333: $sth->execute();
1334: if ($sth->err()) {
1335: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1336: &Apache::lonnet::logthis("\n".$request."\n");
1337: &Apache::lonnet::logthis("error is:".$sth->errstr());
1338: if (defined($symb) && $symb ne '') {
1339: $studentdata = $studentdata->{$symb};
1340: }
1341: return $studentdata;
1342: }
1343: #
1344: foreach my $row (@{$sth->fetchall_arrayref}) {
1345: $rows_retrieved++;
1346: my ($symb,$parameter,$value) = (@$row);
1347: $studentdata->{$symb}->{$parameter} = $value;
1348: }
1349: #
1350: if (defined($symb) && $symb ne '') {
1351: $studentdata = $studentdata->{$symb};
1352: }
1353: return $studentdata;
1354: }
1355:
1356:
1357: sub get_current_state {
1358: my ($sname,$sdom,$symb,$courseid,$forcedownload)=@_;
1359: #
1360: $courseid = $env{'request.course.id'} if (! defined($courseid));
1361: #
1362: return () if (! defined($sname) || ! defined($sdom));
1363: #
1364: my ($status,$data) = &ensure_current_data($sname,$sdom,$courseid);
1365: # &Apache::lonnet::logthis
1366: # ('sname = '.$sname.
1367: # ' domain = '.$sdom.
1368: # ' status = '.$status.
1369: # ' data is '.(defined($data)?'defined':'undefined'));
1370: # while (my ($symb,$hash) = each(%$data)) {
1371: # &Apache::lonnet::logthis($symb."\n----------------------------------");
1372: # while (my ($key,$value) = each (%$hash)) {
1373: # &Apache::lonnet::logthis(" ".$key." = ".$value);
1374: # }
1375: # }
1376: #
1377: if (defined($data) && defined($symb) && ref($data->{$symb})) {
1378: return %{$data->{$symb}};
1379: } elsif (defined($data) && ! defined($symb) && ref($data)) {
1380: return %$data;
1381: }
1382: if ($status eq 'no data') {
1383: return ();
1384: } else {
1385: if ($status ne 'okay' && $status ne '') {
1386: &Apache::lonnet::logthis('status = '.$status);
1387: return ('error: '.$status,undef);
1388: }
1389: my $returnhash = &get_student_data_from_performance_cache($sname,$sdom,
1390: $symb,$courseid);
1391: return %$returnhash if (defined($returnhash));
1392: }
1393: return ();
1394: }
1395:
1396:
1397: sub get_problem_statistics {
1398: my ($Sections,$Groups,$status,$symb,$part,$courseid,$starttime,$endtime) = @_;
1399: return if (! defined($symb) || ! defined($part));
1400: $courseid = $env{'request.course.id'} if (! defined($courseid));
1401: #
1402: &setup_table_names($courseid);
1403: my $symb_id = &get_symb_id($symb);
1404: my $part_id = &get_part_id($part);
1405: my $stats_table = &temp_table_name($courseid,'problem_stats');
1406: #
1407: my $dbh = &Apache::lonmysql::get_dbh();
1408: return undef if (! defined($dbh));
1409: #
1410: # Clean out the table
1411: $dbh->do('DROP TABLE '.$stats_table); # May return an error
1412: my $request =
1413: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
1414: 'SELECT a.student_id,a.solved,a.award,a.awarded,a.tries '.
1415: 'FROM '.$performance_table.' AS a ';
1416: #
1417: # See if we need to include some requirements on the students
1418: if ((defined($Sections) && lc($Sections->[0]) ne 'all') ||
1419: (defined($status) && lc($status) ne 'any')) {
1420: $request .= 'NATURAL LEFT JOIN '.$student_table.' AS b ';
1421: }
1422: my ($groups_join,$group_limits) = &limit_by_group($Groups,'b','c','d');
1423: if (defined($groups_join)) {
1424: $request .= $groups_join;
1425: }
1426: $request .= ' WHERE a.symb_id='.$symb_id.' AND a.part_id='.$part_id;
1427: #
1428: # Limit the students included to those specified
1429: my ($section_limits,$enrollment_limits)=
1430: &limit_by_section_and_status($Sections,$status,'b');
1431: #
1432: # Limit by starttime and endtime
1433: my $time_requirements = undef;
1434: if (defined($starttime)) {
1435: $time_requirements .= 'a.timestamp>='.$starttime;
1436: if (defined($endtime)) {
1437: $time_requirements .= ' AND a.timestamp<='.$endtime;
1438: }
1439: } elsif (defined($endtime)) {
1440: $time_requirements .= 'a.timestamp<='.$endtime;
1441: }
1442: if (defined($time_requirements)) {
1443: $request .= ' AND '.$time_requirements;
1444: }
1445: if (defined($section_limits)) {
1446: $request .= ' AND '.$section_limits;
1447: }
1448: if (defined($enrollment_limits)) {
1449: $request .= ' AND '.$enrollment_limits;
1450: }
1451: # Limit by group, as required
1452: if (defined($group_limits)) {
1453: $request .= ' AND '.$group_limits;
1454: }
1455: #
1456: # Finally, execute the request to create the temporary table
1457: $dbh->do($request);
1458: #
1459: # Collect the first suite of statistics
1460: $request = 'SELECT COUNT(*),SUM(tries),'.
1461: 'AVG(tries),STD(tries) '.
1462: 'FROM '.$stats_table;
1463: my ($num,$tries,$mean,$STD) = &execute_SQL_request
1464: ($dbh,$request);
1465: #
1466: $request = 'SELECT MAX(tries),MIN(tries) FROM '.$stats_table.
1467: ' WHERE awarded>0';
1468: if (defined($time_requirements)) {
1469: $request .= ' AND '.$time_requirements;
1470: }
1471: my ($max,$min) = &execute_SQL_request($dbh,$request);
1472: #
1473: $request = 'SELECT SUM(awarded) FROM '.$stats_table;
1474: if (defined($time_requirements)) {
1475: $request .= ' AND '.$time_requirements;
1476: }
1477: my ($Solved) = &execute_SQL_request($dbh,$request);
1478: #
1479: $request = 'SELECT SUM(awarded) FROM '.$stats_table.
1480: " WHERE solved='correct_by_override'";
1481: if (defined($time_requirements)) {
1482: $request .= ' AND '.$time_requirements;
1483: }
1484: my ($solved) = &execute_SQL_request($dbh,$request);
1485: #
1486: $Solved -= $solved;
1487: #
1488: $num = 0 if (! defined($num));
1489: $tries = 0 if (! defined($tries));
1490: $max = 0 if (! defined($max));
1491: $min = 0 if (! defined($min));
1492: $STD = 0 if (! defined($STD));
1493: $Solved = 0 if (! defined($Solved) || $Solved < 0);
1494: $solved = 0 if (! defined($solved));
1495: #
1496: # Compute the more complicated statistics
1497: my $DegOfDiff = 'nan';
1498: $DegOfDiff = 1-($Solved)/$tries if ($tries>0);
1499: #
1500: my $SKEW = 'nan';
1501: my $wrongpercent = 0;
1502: my $numwrong = 'nan';
1503: if ($num > 0) {
1504: ($SKEW) = &execute_SQL_request($dbh,'SELECT SQRT(SUM('.
1505: 'POWER(tries - '.$STD.',3)'.
1506: '))/'.$num.' FROM '.$stats_table);
1507: $numwrong = $num-$Solved;
1508: $wrongpercent=int(10*100*$numwrong/$num)/10;
1509: }
1510: #
1511: # Drop the temporary table
1512: $dbh->do('DROP TABLE '.$stats_table); # May return an error
1513: #
1514: # Return result
1515: return { num_students => $num,
1516: tries => $tries,
1517: max_tries => $max,
1518: min_tries => $min,
1519: mean_tries => $mean,
1520: std_tries => $STD,
1521: skew_tries => $SKEW,
1522: num_solved => $Solved,
1523: num_override => $solved,
1524: num_wrong => $numwrong,
1525: per_wrong => $wrongpercent,
1526: deg_of_diff => $DegOfDiff };
1527: }
1528:
1529: ##
1530: ## This is a helper for get_statistics
1531: sub execute_SQL_request {
1532: my ($dbh,$request)=@_;
1533: # &Apache::lonnet::logthis($request);
1534: my $sth = $dbh->prepare($request);
1535: if (!$sth) {
1536: die($dbh->errstr . " SQL: $request");
1537: }
1538: $sth->execute();
1539: my $row = $sth->fetchrow_arrayref();
1540: if (ref($row) eq 'ARRAY' && scalar(@$row)>0) {
1541: return @$row;
1542: }
1543: return ();
1544: }
1545:
1546:
1547: sub populate_weight_table {
1548: my ($courseid) = @_;
1549: if (! defined($courseid)) {
1550: $courseid = $env{'request.course.id'};
1551: }
1552: #
1553: &setup_table_names($courseid);
1554: my $navmap = Apache::lonnavmaps::navmap->new();
1555: if (!defined($navmap)) {
1556: &Apache::lonnet::logthis('loncoursedata::populate_weight_table:'.$/.
1557: ' unable to get navmaps resource'.$/.
1558: ' '.join(' ',(caller)));
1559: return;
1560: }
1561: my @sequences = $navmap->retrieveResources(undef,
1562: sub { shift->is_map(); },1,0,1);
1563: my @resources;
1564: foreach my $seq (@sequences) {
1565: push(@resources,$navmap->retrieveResources($seq,
1566: sub {shift->is_problem();},
1567: 0,0,0));
1568: }
1569: if (! scalar(@resources)) {
1570: &Apache::lonnet::logthis('loncoursedata::populate_weight_table:'.$/.
1571: ' no resources returned for '.$courseid);
1572: return;
1573: }
1574: # Since we use lonnet::EXT to retrieve problem weights,
1575: # to ensure current data we must clear the caches out.
1576: &Apache::lonnet::clear_EXT_cache_status();
1577: my $dbh = &Apache::lonmysql::get_dbh();
1578: my $request = 'INSERT IGNORE INTO '.$weight_table.
1579: "(symb_id,part_id,weight) VALUES ";
1580: my $weight;
1581: foreach my $res (@resources) {
1582: my $symb_id = &get_symb_id($res->symb);
1583: foreach my $part (@{$res->parts}) {
1584: my $part_id = &get_part_id($part);
1585: $weight = &Apache::lonnet::EXT('resource.'.$part.'.weight',
1586: $res->symb,
1587: undef,undef,undef);
1588: if (!defined($weight) || ($weight eq '')) {
1589: $weight=1;
1590: }
1591: $request .= "('".$symb_id."','".$part_id."','".$weight."'),";
1592: }
1593: }
1594: $request =~ s/(,)$//;
1595: # &Apache::lonnet::logthis('request = '.$/.$request);
1596: $dbh->do($request);
1597: if ($dbh->err()) {
1598: &Apache::lonnet::logthis("error ".$dbh->errstr().
1599: " occurred executing \n".
1600: $request);
1601: }
1602: return;
1603: }
1604:
1605: sub limit_by_start_end_time {
1606: my ($starttime,$endtime,$table) = @_;
1607: my $time_requirements = undef;
1608: if (defined($starttime)) {
1609: $time_requirements .= $table.".timestamp>='".$starttime."'";
1610: if (defined($endtime)) {
1611: $time_requirements .= " AND ".$table.".timestamp<='".$endtime."'";
1612: }
1613: } elsif (defined($endtime)) {
1614: $time_requirements .= $table.".timestamp<='".$endtime."'";
1615: }
1616: return $time_requirements;
1617: }
1618:
1619:
1620: sub limit_by_section_and_status {
1621: my ($Sections,$enrollment,$tablename) = @_;
1622: my $student_requirements = undef;
1623: if ( (defined($Sections) && $Sections->[0] ne 'all')) {
1624: $student_requirements = '('.
1625: join(' OR ', map { $tablename.".section='".$_."'" } @$Sections
1626: ).')';
1627: }
1628: my $enrollment_requirements=undef;
1629: if (defined($enrollment) && $enrollment ne 'Any') {
1630: my $now = time();
1631: if ( $enrollment eq 'Future' ) {
1632: $enrollment_requirements =
1633: "( $tablename.start > $now AND ".
1634: "( $tablename.end = 0 OR $tablename.end > $now))";
1635: } elsif ( $enrollment eq 'Active' ) {
1636: $enrollment_requirements =
1637: "(( $tablename.start = 0 OR $tablename.start < $now ) AND ".
1638: " ( $tablename.end = 0 OR $tablename.end > $now ))";
1639: } elsif ( $enrollment eq 'Expired' ) {
1640: $enrollment_requirements =
1641: "(( $tablename.start < $now ) AND ".
1642: " ( $tablename.end < $now ))";
1643: }
1644: }
1645: return ($student_requirements,$enrollment_requirements);
1646: }
1647:
1648:
1649:
1650: sub limit_by_group {
1651: my ($Groups,$stutable,$grptable,$stugrptab) = @_;
1652: my $groups_join = undef;
1653: my $group_limits = undef;
1654: if ( (defined($Groups) && $Groups->[0] ne 'all')) {
1655: $groups_join =
1656: ' LEFT JOIN '.$students_groups_table.
1657: ' AS '.$stugrptab.' ON '.
1658: $stugrptab.'.student_id = '.$stutable.'.student_id'.
1659: ' LEFT JOIN '.$groupnames_table.
1660: ' AS '.$grptable.' ON '.
1661: $stugrptab.'.group_id = '.$grptable.'.group_id ';
1662: $group_limits =
1663: ' ('.
1664: join(' OR ', map { "$grptable.groupname='".$_."'" } @$Groups
1665: ).')';
1666: }
1667: return ($groups_join,$group_limits);
1668: }
1669:
1670:
1671: sub RNK_student { return 0; };
1672: sub RNK_score { return 1; };
1673:
1674: sub rank_students_by_scores_on_resources {
1675: my ($resources,$Sections,$Groups,$enrollment,$courseid,$starttime,$endtime,
1676: $has_award_for) = @_;
1677: return if (! defined($resources) || ! ref($resources) eq 'ARRAY');
1678: if (! defined($courseid)) {
1679: $courseid = $env{'request.course.id'};
1680: }
1681: #
1682: &setup_table_names($courseid);
1683: my $dbh = &Apache::lonmysql::get_dbh();
1684: my ($section_limits,$enrollment_limits)=
1685: &limit_by_section_and_status($Sections,$enrollment,'b');
1686: my ($groups_join,$group_limits) = &limit_by_group($Groups,'b','c','d');
1687: my $symb_limits = '('.join(' OR ',map {'a.symb_id='.&get_symb_id($_);
1688: } @$resources
1689: ).')';
1690: my ($award_col, $award_join, $award_clause) = ('', '', '');
1691: if ($has_award_for) {
1692: my $resource_id = &get_symb_id($has_award_for);
1693: $award_col = ", perf.awarded";
1694: $award_join = "LEFT JOIN $performance_table AS perf ON perf.symb_id"
1695: ." = $resource_id AND perf.student_id = b.student_id ";
1696: $award_clause = "AND perf.awarded IS NOT NULL";
1697: }
1698: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
1699: my $request = "SELECT b.student,SUM(a.awarded*w.weight) AS score "
1700: ."$award_col FROM $performance_table AS a ".
1701: "NATURAL LEFT JOIN $weight_table AS w ".
1702: "LEFT JOIN $student_table AS b ON a.student_id=b.student_id ".
1703: "$award_join $groups_join ";
1704: my $limits;
1705: if (defined($section_limits)) {
1706: $limits .= $section_limits.' AND ';
1707: }
1708: if (defined($enrollment_limits)) {
1709: $limits .= $enrollment_limits.' AND ';
1710: }
1711: if (defined($time_limits)) {
1712: $limits .= $time_limits.' AND ';
1713: }
1714: if ($symb_limits ne '()') {
1715: $limits .= $symb_limits.' AND ';
1716: }
1717: if (defined($group_limits)) {
1718: $limits .= $group_limits.' AND ';
1719: }
1720: if ($limits) {
1721: $limits =~ s/( AND )$//; # Remove extra conjunction
1722: $request .= "WHERE $limits";
1723: }
1724: $request .= " $award_clause GROUP BY a.student_id ORDER BY score";
1725: #&Apache::lonnet::logthis('request = '.$/.$request);
1726: my $sth = $dbh->prepare($request) or die "Can't prepare $request";
1727: $sth->execute();
1728: my $rows = $sth->fetchall_arrayref();
1729: return ($rows);
1730: }
1731:
1732: sub get_sum_of_scores {
1733: my ($symb,$part,$students,$courseid,$starttime,$endtime) = @_;
1734: if (! defined($courseid)) {
1735: $courseid = $env{'request.course.id'};
1736: }
1737: if (defined($students) &&
1738: ((@$students == 0) ||
1739: (@$students == 1 && (! defined($students->[0]) ||
1740: $students->[0] eq ''))
1741: )
1742: ){
1743: undef($students);
1744: }
1745: #
1746: &setup_table_names($courseid);
1747: my $dbh = &Apache::lonmysql::get_dbh();
1748: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
1749: my $request = 'SELECT SUM(a.awarded*w.weight),SUM(w.weight) FROM '.
1750: $performance_table.' AS a '.
1751: 'NATURAL LEFT JOIN '.$weight_table.' AS w ';
1752: $request .= 'WHERE a.symb_id='.&get_symb_id($symb).
1753: ' AND a.part_id='.&get_part_id($part);
1754: if (defined($time_limits)) {
1755: $request .= ' AND '.$time_limits;
1756: }
1757: if (defined($students)) {
1758: $request .= ' AND ('.
1759: join(' OR ',map {'a.student_id='.&get_student_id(split(':',$_));
1760: } @$students).
1761: ')';
1762: }
1763: my $sth = $dbh->prepare($request);
1764: $sth->execute();
1765: my $rows = $sth->fetchrow_arrayref();
1766: if ($dbh->err) {
1767: &Apache::lonnet::logthis('error 1 = '.$dbh->errstr());
1768: &Apache::lonnet::logthis('prepared then executed, fetchrow_arrayrefed'.
1769: $/.$request);
1770: return (undef,undef);
1771: }
1772: return ($rows->[0],$rows->[1]);
1773: }
1774:
1775:
1776: sub score_stats {
1777: my ($Sections,$Groups,$enrollment,$symbs,$starttime,$endtime,$courseid)=@_;
1778: if (! defined($courseid)) {
1779: $courseid = $env{'request.course.id'};
1780: }
1781: #
1782: &setup_table_names($courseid);
1783: my $dbh = &Apache::lonmysql::get_dbh();
1784: #
1785: my ($section_limits,$enrollment_limits)=
1786: &limit_by_section_and_status($Sections,$enrollment,'b');
1787: my ($groups_join,$group_limits) = &limit_by_group($Groups,'b','c','d');
1788: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
1789: my @Symbids = map { &get_symb_id($_); } @{$symbs};
1790: #
1791: my $stats_table = &temp_table_name($courseid,'problem_stats');
1792: my $symb_restriction = join(' OR ',map {'a.symb_id='.$_;} @Symbids);
1793: my $request = 'DROP TABLE '.$stats_table;
1794: $dbh->do($request);
1795: $request =
1796: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
1797: 'SELECT a.student_id,'.
1798: 'SUM(a.awarded*w.weight) AS score FROM '.
1799: $performance_table.' AS a '.
1800: 'NATURAL LEFT JOIN '.$weight_table.' AS w '.
1801: 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.
1802: $groups_join;
1803: my $limit = ' WHERE ('.$symb_restriction.')';
1804: if ($time_limits) {
1805: $limit .= ' AND '.$time_limits;
1806: }
1807: if ($section_limits) {
1808: $limit .= ' AND '.$section_limits;
1809: }
1810: if ($enrollment_limits) {
1811: $limit .= ' AND '.$enrollment_limits;
1812: }
1813: if ($group_limits) {
1814: $limit .= ' AND '.$group_limits;
1815: }
1816: $request .= $limit.' GROUP BY a.student_id';
1817: # &Apache::lonnet::logthis('request = '.$/.$request);
1818: my $sth = $dbh->prepare($request);
1819: $sth->execute();
1820: $request =
1821: 'SELECT AVG(score),STD(score),MAX(score),MIN(score),COUNT(score) '.
1822: 'FROM '.$stats_table;
1823: my ($ave,$std,$max,$min,$count) = &execute_SQL_request($dbh,$request);
1824: # &Apache::lonnet::logthis('request = '.$/.$request);
1825:
1826: $request = 'SELECT SUM(weight) FROM '.$weight_table.
1827: ' AS a WHERE ('.$symb_restriction.')';
1828: my ($max_possible) = &execute_SQL_request($dbh,$request);
1829: # &Apache::lonnet::logthis('request = '.$/.$request);
1830: return($min,$max,$ave,$std,$count,$max_possible);
1831: }
1832:
1833:
1834:
1835: sub count_stats {
1836: my ($Sections,$Groups,$enrollment,$symbs,$starttime,$endtime,$courseid)=@_;
1837: if (! defined($courseid)) {
1838: $courseid = $env{'request.course.id'};
1839: }
1840: #
1841: &setup_table_names($courseid);
1842: my $dbh = &Apache::lonmysql::get_dbh();
1843: #
1844: my ($section_limits,$enrollment_limits)=
1845: &limit_by_section_and_status($Sections,$enrollment,'b');
1846: my ($groups_join,$group_limits) = &limit_by_group($Groups,'b','c','d');
1847: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
1848: my @Symbids = map { &get_symb_id($_); } @{$symbs};
1849: #
1850: my $stats_table = &temp_table_name($courseid,'problem_stats');
1851: my $symb_restriction = join(' OR ',map {'a.symb_id='.$_;} @Symbids);
1852: my $request = 'DROP TABLE '.$stats_table;
1853: $dbh->do($request);
1854: $request =
1855: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
1856: 'SELECT a.student_id,'.
1857: 'SUM(a.awarded) AS count FROM '.
1858: $performance_table.' AS a '.
1859: 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.
1860: $groups_join;
1861: my $limit = ' WHERE ('.$symb_restriction.')';
1862: if ($time_limits) {
1863: $limit .= ' AND '.$time_limits;
1864: }
1865: if ($section_limits) {
1866: $limit .= ' AND '.$section_limits;
1867: }
1868: if ($enrollment_limits) {
1869: $limit .= ' AND '.$enrollment_limits;
1870: }
1871: if ($group_limits) {
1872: $limit .= ' AND '.$group_limits;
1873: }
1874: $request .= $limit.' GROUP BY a.student_id';
1875: # &Apache::lonnet::logthis('request = '.$/.$request);
1876: my $sth = $dbh->prepare($request);
1877: $sth->execute();
1878: $request =
1879: 'SELECT AVG(count),STD(count),MAX(count),MIN(count),COUNT(count) '.
1880: 'FROM '.$stats_table;
1881: my ($ave,$std,$max,$min,$count) = &execute_SQL_request($dbh,$request);
1882: # &Apache::lonnet::logthis('request = '.$/.$request);
1883: return($min,$max,$ave,$std,$count);
1884: }
1885:
1886:
1887: sub get_student_data {
1888: my ($students,$courseid) = @_;
1889: $courseid = $env{'request.course.id'} if (! defined($courseid));
1890: &setup_table_names($courseid);
1891: my $dbh = &Apache::lonmysql::get_dbh();
1892: return undef if (! defined($dbh));
1893: my $request = 'SELECT '.
1894: 'student_id, student '.
1895: 'FROM '.$student_table;
1896: if (defined($students)) {
1897: $request .= ' WHERE ('.
1898: join(' OR ', map {'student_id='.
1899: &get_student_id($_->{'username'},
1900: $_->{'domain'})
1901: } @$students
1902: ).')';
1903: }
1904: $request.= ' ORDER BY student_id';
1905: my $sth = $dbh->prepare($request);
1906: $sth->execute();
1907: if ($dbh->err) {
1908: &Apache::lonnet::logthis('error 2 = '.$dbh->errstr());
1909: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
1910: return undef;
1911: }
1912: my $dataset = $sth->fetchall_arrayref();
1913: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
1914: return $dataset;
1915: }
1916: }
1917:
1918: sub RD_student_id { return 0; }
1919: sub RD_awarddetail { return 1; }
1920: sub RD_response_eval { return 2; }
1921: sub RD_response_eval_2 { return 3; }
1922: sub RD_submission { return 4; }
1923: sub RD_timestamp { return 5; }
1924: sub RD_tries { return 6; }
1925: sub RD_sname { return 7; }
1926:
1927: sub get_response_data {
1928: my ($Sections,$Groups,$enrollment,$symb,$response,$courseid) = @_;
1929: return undef if (! defined($symb) ||
1930: ! defined($response));
1931: $courseid = $env{'request.course.id'} if (! defined($courseid));
1932: #
1933: &setup_table_names($courseid);
1934: my $symb_id = &get_symb_id($symb);
1935: if (! defined($symb_id)) {
1936: &Apache::lonnet::logthis('Unable to find symb for '.$symb.' in '.$courseid);
1937: return undef;
1938: }
1939: my $response_id = &get_part_id($response);
1940: if (! defined($response_id)) {
1941: &Apache::lonnet::logthis('Unable to find id for '.$response.' in '.$courseid);
1942: return undef;
1943: }
1944: #
1945: my $dbh = &Apache::lonmysql::get_dbh();
1946: return undef if (! defined($dbh));
1947: #
1948: my ($student_requirements,$enrollment_requirements) =
1949: &limit_by_section_and_status($Sections,$enrollment,'d');
1950: my ($groups_join,$group_limits) = &limit_by_group($Groups,'d','e','f');
1951: my $request = 'SELECT '.
1952: 'a.student_id, a.awarddetail, a.response_specific_value, '.
1953: 'a.response_specific_value_2, a.submission, b.timestamp, '.
1954: 'c.tries, d.student '.
1955: 'FROM '.$fulldump_response_table.' AS a '.
1956: 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
1957: 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
1958: 'a.transaction = b.transaction '.
1959: 'LEFT JOIN '.$fulldump_part_table.' AS c '.
1960: 'ON a.symb_id=c.symb_id AND a.student_id=c.student_id AND '.
1961: 'a.part_id=c.part_id AND a.transaction = c.transaction '.
1962: 'LEFT JOIN '.$student_table.' AS d '.
1963: 'ON a.student_id=d.student_id '.
1964: $groups_join;
1965: my $limit = ' WHERE '.
1966: 'a.symb_id='.$symb_id.' AND a.response_id='.$response_id;
1967: if (defined($student_requirements)) {
1968: $limit .= ' AND '.$student_requirements;
1969: }
1970: if (defined($enrollment_requirements)) {
1971: $limit .= ' AND '.$enrollment_requirements;
1972: }
1973: if (defined($group_limits)) {
1974: $limit .= ' AND '.$group_limits;
1975: }
1976: $request .= $limit.' ORDER BY b.timestamp';
1977: # &Apache::lonnet::logthis("request =\n".$request);
1978: my $sth = $dbh->prepare($request);
1979: $sth->execute();
1980: if ($dbh->err) {
1981: &Apache::lonnet::logthis('error 3 = '.$dbh->errstr());
1982: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
1983: return undef;
1984: }
1985: my $dataset = $sth->fetchall_arrayref();
1986: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
1987: # Clear the \'s from around the submission
1988: for (my $i =0;$i<scalar(@$dataset);$i++) {
1989: $dataset->[$i]->[&RD_submission()] =~ s/(\'$|^\')//g;
1990: }
1991: return $dataset;
1992: }
1993: }
1994:
1995:
1996: sub RDs_awarddetail { return 3; }
1997: sub RDs_submission { return 2; }
1998: sub RDs_timestamp { return 1; }
1999: sub RDs_tries { return 0; }
2000: sub RDs_awarded { return 4; }
2001: sub RDs_response_eval { return 5; }
2002: sub RDs_response_eval_2 { return 6; }
2003: sub RDs_part_award { return 7; }
2004:
2005: sub get_response_data_by_student {
2006: my ($student,$symb,$response,$courseid) = @_;
2007: return undef if (! defined($symb) ||
2008: ! defined($response));
2009: $courseid = $env{'request.course.id'} if (! defined($courseid));
2010: #
2011: &setup_table_names($courseid);
2012: my $symb_id = &get_symb_id($symb);
2013: my $response_id = &get_part_id($response);
2014: #
2015: my $student_id = &get_student_id($student->{'username'},
2016: $student->{'domain'});
2017: #
2018: my $dbh = &Apache::lonmysql::get_dbh();
2019: return undef if (! defined($dbh));
2020: my $request = 'SELECT '.
2021: 'c.tries, b.timestamp, a.submission, a.awarddetail, c.awarded, '.
2022: 'a.response_specific_value, a.response_specific_value_2, c.award '.
2023: 'FROM '.$fulldump_response_table.' AS a '.
2024: 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2025: 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2026: 'a.transaction = b.transaction '.
2027: 'LEFT JOIN '.$fulldump_part_table.' AS c '.
2028: 'ON a.symb_id=c.symb_id AND a.student_id=c.student_id AND '.
2029: 'a.part_id=c.part_id AND a.transaction = c.transaction '.
2030: 'LEFT JOIN '.$student_table.' AS d '.
2031: 'ON a.student_id=d.student_id '.
2032: 'LEFT JOIN '.$performance_table.' AS e '.
2033: 'ON a.symb_id=e.symb_id AND a.part_id=e.part_id AND '.
2034: 'a.student_id=e.student_id AND c.tries=e.tries '.
2035: 'WHERE '.
2036: 'a.symb_id='.$symb_id.' AND a.response_id='.$response_id.
2037: ' AND a.student_id='.$student_id.' ORDER BY b.timestamp';
2038: # &Apache::lonnet::logthis("request =\n".$request);
2039: my $sth = $dbh->prepare($request);
2040: $sth->execute();
2041: if ($dbh->err) {
2042: &Apache::lonnet::logthis('error 4 = '.$dbh->errstr());
2043: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
2044: return undef;
2045: }
2046: my $dataset = $sth->fetchall_arrayref();
2047: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2048: # Clear the \'s from around the submission
2049: for (my $i =0;$i<scalar(@$dataset);$i++) {
2050: $dataset->[$i]->[&RDs_submission] =~ s/(\'$|^\')//g;
2051: }
2052: return $dataset;
2053: }
2054: return undef; # error occurred
2055: }
2056:
2057: sub RT_student_id { return 0; }
2058: sub RT_awarded { return 1; }
2059: sub RT_tries { return 2; }
2060: sub RT_timestamp { return 3; }
2061:
2062: sub get_response_time_data {
2063: my ($sections,$groups,$enrollment,$symb,$part,$courseid) = @_;
2064: return undef if (! defined($symb) ||
2065: ! defined($part));
2066: $courseid = $env{'request.course.id'} if (! defined($courseid));
2067: #
2068: &setup_table_names($courseid);
2069: my $symb_id = &get_symb_id($symb);
2070: if (! defined($symb_id)) {
2071: &Apache::lonnet::logthis('Unable to find symb for '.$symb.' in '.$courseid);
2072: return undef;
2073: }
2074: my $part_id = &get_part_id($part);
2075: if (! defined($part_id)) {
2076: &Apache::lonnet::logthis('Unable to find id for '.$part.' in '.$courseid);
2077: return undef;
2078: }
2079: #
2080: my $dbh = &Apache::lonmysql::get_dbh();
2081: return undef if (! defined($dbh));
2082: my ($student_requirements,$enrollment_requirements) =
2083: &limit_by_section_and_status($sections,$enrollment,'d');
2084: my ($groups_join,$group_limits) = &limit_by_group($groups,'d','e','f');
2085: my $request = 'SELECT '.
2086: 'a.student_id, a.awarded, a.tries, b.timestamp '.
2087: 'FROM '.$fulldump_part_table.' AS a '.
2088: 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2089: 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2090: 'a.transaction = b.transaction '.
2091: 'LEFT JOIN '.$student_table.' as d '.
2092: 'ON a.student_id=d.student_id '.
2093: $groups_join;
2094: my $limit = ' WHERE '.
2095: 'a.symb_id='.$symb_id.' AND a.part_id='.$part_id;
2096: if (defined($student_requirements)) {
2097: $limit .= ' AND '.$student_requirements;
2098: }
2099: if (defined($enrollment_requirements)) {
2100: $limit .= ' AND '.$enrollment_requirements;
2101: }
2102: if (defined($group_limits)) {
2103: $limit .= ' AND '.$group_limits;
2104: }
2105: $request .= $limit.' ORDER BY b.timestamp';
2106: # &Apache::lonnet::logthis("request =\n".$request);
2107: my $sth = $dbh->prepare($request);
2108: $sth->execute();
2109: if ($dbh->err) {
2110: &Apache::lonnet::logthis('error 5 = '.$dbh->errstr());
2111: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
2112: return undef;
2113: }
2114: my $dataset = $sth->fetchall_arrayref();
2115: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2116: return $dataset;
2117: }
2118:
2119: }
2120:
2121: sub get_student_scores {
2122: my ($sections,$groups,$Symbs,$enrollment,$courseid,$starttime,$endtime) = @_;
2123: $courseid = $env{'request.course.id'} if (! defined($courseid));
2124: &setup_table_names($courseid);
2125: my $dbh = &Apache::lonmysql::get_dbh();
2126: return (undef) if (! defined($dbh));
2127: my $tmptable = &temp_table_name($courseid,'temp_'.time);
2128: my $request = 'DROP TABLE IF EXISTS '.$tmptable;
2129: # &Apache::lonnet::logthis('request = '.$/.$request);
2130: $dbh->do($request);
2131: #
2132: my $symb_requirements;
2133: if (defined($Symbs) && @$Symbs) {
2134: $symb_requirements = '('.
2135: join(' OR ', map{ "(a.symb_id='".&get_symb_id($_->{'symb'}).
2136: "' AND a.part_id='".&get_part_id($_->{'part'}).
2137: "')"
2138: } @$Symbs).')';
2139: }
2140: #
2141: my ($student_requirements,$enrollment_requirements) =
2142: &limit_by_section_and_status($sections,$enrollment,'b');
2143: #
2144: my ($groups_join,$group_limits) = &limit_by_group($groups,'b','d','e');
2145: my $time_requirements = &limit_by_start_end_time($starttime,$endtime,'a');
2146: ##
2147: $request = 'CREATE TEMPORARY TABLE IF NOT EXISTS '.$tmptable.
2148: ' SELECT a.student_id,SUM(a.awarded*c.weight) AS score FROM '.
2149: $performance_table.' AS a ';
2150: $request .= "LEFT JOIN ".$weight_table.' AS c ON a.symb_id=c.symb_id AND a.part_id=c.part_id ';
2151: if (defined($student_requirements) || defined($enrollment_requirements)) {
2152: $request .= ' LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id ';
2153: }
2154: if (defined($groups_join)) {
2155: $request .= $groups_join;
2156: }
2157: if (defined($symb_requirements) ||
2158: defined($student_requirements) ||
2159: defined($enrollment_requirements) ||
2160: defined($group_limits) ) {
2161: $request .= ' WHERE ';
2162: }
2163: if (defined($symb_requirements)) {
2164: $request .= $symb_requirements.' AND ';
2165: }
2166: if (defined($student_requirements)) {
2167: $request .= $student_requirements.' AND ';
2168: }
2169: if (defined($enrollment_requirements)) {
2170: $request .= $enrollment_requirements.' AND ';
2171: }
2172: if (defined($time_requirements)) {
2173: $request .= $time_requirements.' AND ';
2174: }
2175: $request =~ s/ AND $//; # Strip of the trailing ' AND '.
2176: $request .= ' GROUP BY a.student_id';
2177: # &Apache::lonnet::logthis("request = \n".$request);
2178: my $sth = $dbh->prepare($request);
2179: $sth->execute();
2180: if ($dbh->err) {
2181: &Apache::lonnet::logthis('error 6 = '.$dbh->errstr());
2182: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
2183: return undef;
2184: }
2185: $request = 'SELECT score,COUNT(*) FROM '.$tmptable.' GROUP BY score';
2186: # &Apache::lonnet::logthis("request = \n".$request);
2187: $sth = $dbh->prepare($request);
2188: $sth->execute();
2189: if ($dbh->err) {
2190: &Apache::lonnet::logthis('error 7 = '.$dbh->errstr());
2191: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
2192: return undef;
2193: }
2194: my $dataset = $sth->fetchall_arrayref();
2195: return $dataset;
2196: }
2197:
2198:
2199:
2200: sub setup_table_names {
2201: my ($courseid) = @_;
2202: if (! defined($courseid)) {
2203: $courseid = $env{'request.course.id'};
2204: }
2205: #
2206: if (! defined($current_course) || $current_course ne $courseid) {
2207: # Clear out variables
2208: $have_read_part_table = 0;
2209: undef(%ids_by_part);
2210: undef(%parts_by_id);
2211: $have_read_symb_table = 0;
2212: undef(%ids_by_symb);
2213: undef(%symbs_by_id);
2214: $have_read_student_table = 0;
2215: undef(%ids_by_student);
2216: undef(%students_by_id);
2217: $have_read_groupnames_table = 0;
2218: undef(%ids_by_groupname);
2219: #
2220: $current_course = $courseid;
2221: }
2222: #
2223: # Set up database names
2224: my $base_id = 'md5_'.&Digest::MD5::md5_hex($courseid);
2225: $symb_table = $base_id.'_'.'symb';
2226: $part_table = $base_id.'_'.'part';
2227: $student_table = $base_id.'_'.'student';
2228: $groupnames_table = $base_id.'_'.'groupnames';
2229: $students_groups_table = $base_id.'_'.'studentgroups';
2230: $performance_table = $base_id.'_'.'performance';
2231: $parameters_table = $base_id.'_'.'parameters';
2232: $fulldump_part_table = $base_id.'_'.'partdata';
2233: $fulldump_response_table = $base_id.'_'.'responsedata';
2234: $fulldump_timestamp_table = $base_id.'_'.'timestampdata';
2235: $weight_table = $base_id.'_'.'weight';
2236: #
2237: @Tables = (
2238: $symb_table,
2239: $part_table,
2240: $student_table,
2241: $groupnames_table,
2242: $students_groups_table,
2243: $performance_table,
2244: $parameters_table,
2245: $fulldump_part_table,
2246: $fulldump_response_table,
2247: $fulldump_timestamp_table,
2248: $weight_table,
2249: );
2250: return;
2251: }
2252:
2253: sub temp_table_name {
2254: my ($courseid,$affix) = @_;
2255: my $base_id = 'md5_'.&Digest::MD5::md5_hex($courseid);
2256: return $base_id.'_'.$affix;
2257: }
2258:
2259:
2260: } # End scope of table identifiers
2261:
2262:
2263:
2264: sub CL_SDOM { return 0; }
2265: sub CL_SNAME { return 1; }
2266: sub CL_END { return 2; }
2267: sub CL_START { return 3; }
2268: sub CL_ID { return 4; }
2269: sub CL_SECTION { return 5; }
2270: sub CL_FULLNAME { return 6; }
2271: sub CL_STATUS { return 7; }
2272: sub CL_TYPE { return 8; }
2273: sub CL_LOCKEDTYPE { return 9; }
2274: sub CL_GROUP { return 10; }
2275: sub CL_PERMANENTEMAIL { return 11; }
2276: sub CL_ROLE { return 12; }
2277: sub CL_EXTENT { return 13; }
2278: sub CL_PHOTO { return 14; }
2279: sub CL_THUMBNAIL { return 15; }
2280:
2281: sub get_classlist {
2282: my ($cdom,$cnum) = @_;
2283: my $cid = $cdom.'_'.$cnum;
2284: if (!defined($cdom) || !defined($cnum)) {
2285: $cid = $env{'request.course.id'};
2286: $cdom = $env{'course.'.$cid.'.domain'};
2287: $cnum = $env{'course.'.$cid.'.num'};
2288: }
2289: my $now = time;
2290: #
2291: my %classlist=&Apache::lonnet::dump('classlist',$cdom,$cnum);
2292: while (my ($student,$info) = each(%classlist)) {
2293: if ($student =~ /^(con_lost|error|no_such_host)/i) {
2294: &Apache::lonnet::logthis('get_classlist error for '.$cid.':'.$student);
2295: return undef;
2296: }
2297: my ($sname,$sdom) = split(/:/,$student);
2298: my @Values = split(/:/,$info);
2299: my ($end,$start,$id,$section,$fullname,$type,$lockedtype);
2300: if (@Values > 2) {
2301: ($end,$start,$id,$section,$fullname,$type,$lockedtype) = @Values;
2302: } else { # We have to get the data ourselves
2303: ($end,$start) = @Values;
2304: $section = &Apache::lonnet::getsection($sdom,$sname,$cid);
2305: my %info=&Apache::lonnet::get('environment',
2306: ['firstname','middlename',
2307: 'lastname','generation','id'],
2308: $sdom, $sname);
2309: my ($tmp) = keys(%info);
2310: if ($tmp =~/^(con_lost|error|no_such_host)/i) {
2311: $fullname = 'not available';
2312: $id = 'not available';
2313: &Apache::lonnet::logthis('unable to retrieve environment '.
2314: 'for '.$sname.':'.$sdom);
2315: } else {
2316: $fullname = &Apache::lonnet::format_name(@info{qw/firstname middlename lastname generation/},'lastname');
2317: $id = $info{'id'};
2318: }
2319: # Update the classlist with this students information
2320: if ($fullname ne 'not available') {
2321: my $enrolldata = join(':',$end,$start,$id,$section,$fullname);
2322: my $reply=&Apache::lonnet::cput('classlist',
2323: {$student => $enrolldata},
2324: $cdom,$cnum);
2325: if ($reply !~ /^(ok|delayed)/) {
2326: &Apache::lonnet::logthis('Unable to update classlist for '.
2327: 'student '.$sname.':'.$sdom.
2328: ' error:'.$reply);
2329: }
2330: }
2331: }
2332: my $status='Expired';
2333: if(((!$end) || $now < $end) && ((!$start) || ($now > $start))) {
2334: $status='Active';
2335: }
2336: if(($now < $start) && ((!$end) || $now < $end )) {
2337: $status='Future';
2338: }
2339: $classlist{$student} =
2340: [$sdom,$sname,$end,$start,$id,$section,$fullname,$status,$type,$lockedtype];
2341: }
2342: if (wantarray()) {
2343: return (\%classlist,['domain','username','end','start','id',
2344: 'section','fullname','status','type','lockedtype']);
2345: } else {
2346: return \%classlist;
2347: }
2348: }
2349:
2350: sub get_group_memberships {
2351: my ($classlist,$keylist,$cdom,$cnum) = @_;
2352:
2353: return ({},{}) if (!ref($classlist) || !ref($keylist));
2354:
2355: my $cid = $cdom.'_'.$cnum;
2356: if (!defined($cdom) || !defined($cnum)) {
2357: $cid = $env{'request.course.id'};
2358: $cdom = $env{'course.'.$cid.'.domain'};
2359: $cnum = $env{'course.'.$cid.'.num'};
2360: }
2361: my (%classgroups,%studentgroups);
2362: my $now = time;
2363: my $access_end = $env{'course.'.$cid.'.default_enrollment_end_date'};
2364: my %curr_groups =&Apache::longroup::coursegroups($cdom,$cnum);
2365: if (%curr_groups) {
2366: my $grpindex = &CL_GROUP();
2367: my %groupmemberhash =
2368: &Apache::lonnet::get_group_membership($cdom,$cnum);
2369: foreach my $student (keys(%{$classlist})) {
2370: %{$classgroups{$student}} = ();
2371: my $hasgroup = 0;
2372: foreach my $status ('previous','future','active','aftercourse') {
2373: %{$classgroups{$student}{$status}} = ();
2374: }
2375: foreach my $group (keys(%curr_groups)) {
2376: if (defined($groupmemberhash{$group.':'.$student})) {
2377: my ($end,$start) = split(/:/,$groupmemberhash{$group.':'.
2378: $student});
2379: if ($start == -1) {
2380: next;
2381: } else {
2382: $studentgroups{$group} ++;
2383: $hasgroup = 1;
2384: if ($end && $end < $now) {
2385: $classgroups{$student}{'previous'}{$group} =
2386: $groupmemberhash{$group.':'.$student};
2387: if ($classlist->{$student}[&CL_STATUS()] eq 'Expired') {
2388: if ($access_end && $access_end < $now) {
2389: if ($access_end - $end < 86400) {
2390: $classgroups{$student}{'aftercourse'}{$group} = $groupmemberhash{$group.':'.$student};
2391: }
2392: }
2393: }
2394: } elsif ($now > $start) {
2395: if (!$end || $end > $now) {
2396: $classgroups{$student}{'active'}{$group} =
2397: $groupmemberhash{$group.':'.$student};
2398: }
2399: } else {
2400: $classgroups{$student}{'future'}{$group} =
2401: $groupmemberhash{$group.':'.$student};
2402: }
2403: }
2404: }
2405: }
2406: if (!$hasgroup) {
2407: $studentgroups{'none'} ++;
2408: } else {
2409: $classlist->{$student}->[$grpindex] = join(',',
2410: sort(keys(%{$classgroups{$student}{'active'}})));
2411: }
2412: }
2413: }
2414: return (\%classgroups,\%studentgroups);
2415: }
2416:
2417: sub get_students_groups {
2418: my ($student,$enrollment_status,$classgroups) = @_;
2419: my @studentsgroups = ();
2420: if (ref($$classgroups{$student}{'active'}) eq 'HASH') {
2421: push(@studentsgroups,keys(%{$$classgroups{$student}{'active'}}));
2422: }
2423: if ($enrollment_status eq 'Any') {
2424: foreach my $status ('previous','future') {
2425: if (ref($$classgroups{$student}{$status}) eq 'HASH') {
2426: push(@studentsgroups,keys(%{$$classgroups{$student}{$status}}));
2427: }
2428: }
2429: } else {
2430: if (ref($$classgroups{$student}{'aftercourse'}) eq 'HASH') {
2431: push(@studentsgroups,keys(%{$$classgroups{$student}{'aftercourse'}}));
2432: }
2433: }
2434: return @studentsgroups;
2435: }
2436:
2437:
2438: # ----- END HELPER FUNCTIONS --------------------------------------------
2439:
2440: 1;
2441: __END__
2442:
2443:
2444: =pod
2445:
2446: =head1 NAME
2447:
2448: Apache::loncoursedata
2449:
2450: =head1 SYNOPSIS
2451:
2452: Set of functions that download and process student and course information.
2453:
2454: =head1 PACKAGES USED
2455:
2456: Apache::lonnet
2457: Apache::longroup
2458: Time::HiRes
2459: Apache::lonmysql
2460: LONCAPA
2461: Digest::MD5
2462:
2463: =head1 DOWNLOAD INFORMATION
2464:
2465: This section contains all the functions that get data from other servers
2466: and/or itself.
2467:
2468:
2469:
2470: =head1 LOCAL DATA CACHING SUBROUTINES
2471:
2472: The local caching is done using MySQL. There is no fall-back implementation
2473: if MySQL is not running.
2474:
2475: The programmers interface is to call &get_current_state() or some other
2476: primary interface subroutine (described below). The internals of this
2477: storage system are documented here.
2478:
2479: There are six tables used to store student performance data (the results of
2480: a dumpcurrent). Each of these tables is created in MySQL with a name of
2481: $courseid_*****, where ***** is 'symb', 'part', or whatever is appropriate
2482: for the table. The tables and their purposes are described below.
2483:
2484: Some notes before we get started.
2485:
2486: Each table must have a PRIMARY KEY, which is a column or set of columns which
2487: will serve to uniquely identify a row of data. NULL is not allowed!
2488:
2489: INDEXes work best on integer data.
2490:
2491: JOIN is used to combine data from many tables into one output.
2492:
2493: lonmysql.pm is used for some of the interface, specifically the table creation
2494: calls. The inserts are done in bulk by directly calling the database handler.
2495: The SELECT ... JOIN statement used to retrieve the data does not have an
2496: interface in lonmysql.pm and I shudder at the thought of writing one.
2497:
2498: =head2 Table Descriptions
2499:
2500: =over 4
2501:
2502: =head2 Tables used to store meta information
2503:
2504: The following tables hold data required to keep track of the current status
2505: of a students data in the tables or to look up the students data in the tables.
2506:
2507: =over 4
2508:
2509: =item C<$symb_table>
2510:
2511: The symb_table has two columns. The first is a 'symb_id' and the second
2512: is the text name for the 'symb' (limited to 64k). The 'symb_id' is generated
2513: automatically by MySQL so inserts should be done on this table with an
2514: empty first element. This table has its PRIMARY KEY on the 'symb_id'.
2515:
2516: =item C<$part_table>
2517:
2518: The part_table has two columns. The first is a 'part_id' and the second
2519: is the text name for the 'part' (limited to 100 characters). The 'part_id' is
2520: generated automatically by MySQL so inserts should be done on this table with
2521: an empty first element. This table has its PRIMARY KEY on the 'part' (100
2522: characters) and a KEY on 'part_id'.
2523:
2524: =item C<$student_table>
2525:
2526: The student_table has 7 columns. The first is a 'student_id' assigned by
2527: MySQL. The second is 'student' which is username:domain. The third through
2528: fifth are 'section', 'status' (enrollment status), and 'classification'
2529: (to be used in the future). The sixth and seventh ('updatetime' and
2530: 'fullupdatetime') contain the time of last update and full update of student
2531: data. This table has its PRIMARY KEY on the 'student_id' column and is indexed
2532: on 'student', 'section', and 'status'.
2533:
2534: =item C<$groupnames_table>
2535:
2536: The groupnames_table has 2 columns. The first is a 'group_id' assigned by
2537: MySQL. The second is 'groupname' which is the name of the group in the course.
2538:
2539: =item C<$students_groups_table>
2540:
2541: The students_groups_table has 2 columns. The first is the 'student_id', and the
2542: second is the 'group_id'. These two columns comprise the PRIMARY KEY for this
2543: table, as an individual student may be affiliated with more than one group at
2544: any time. This table is indexed on both student_id and group_id.
2545:
2546: =back
2547:
2548: =head2 Tables used to store current status data
2549:
2550: The following tables store data only about the students current status on
2551: a problem, meaning only the data related to the last attempt on a problem.
2552:
2553: =over 4
2554:
2555: =item C<$performance_table>
2556:
2557: The performance_table has 9 columns. The first three are 'symb_id',
2558: 'student_id', and 'part_id'. These comprise the PRIMARY KEY for this table
2559: and are directly related to the $symb_table, $student_table, and $part_table
2560: described above. MySQL does better indexing on numeric items than text,
2561: so we use these three "index tables". The remaining columns are
2562: 'solved', 'tries', 'awarded', 'award', 'awarddetail', and 'timestamp'.
2563: These are either the MySQL type TINYTEXT or various integers ('tries' and
2564: 'timestamp'). This table has KEYs of 'student_id' and 'symb_id'.
2565: For use of this table, see the functions described below.
2566:
2567: =item C<$parameters_table>
2568:
2569: The parameters_table holds the data that does not fit neatly into the
2570: performance_table. The parameters table has four columns: 'symb_id',
2571: 'student_id', 'parameter', and 'value'. 'symb_id', 'student_id', and
2572: 'parameter' comprise the PRIMARY KEY for this table. 'parameter' is
2573: limited to 255 characters. 'value' is limited to 64k characters.
2574:
2575: =back
2576:
2577: =head2 Tables used for storing historic data
2578:
2579: The following tables are used to store almost all of the transactions a student
2580: has made on a homework problem. See loncapa/docs/homework/datastorage for
2581: specific information about each of the parameters stored.
2582:
2583: =over 4
2584:
2585: =item C<$fulldump_response_table>
2586:
2587: The response table holds data (documented in loncapa/docs/homework/datastorage)
2588: associated with a particular response id which is stored when a student
2589: attempts a problem. The following are the columns of the table, in order:
2590: 'symb_id','part_id','response_id','student_id','transaction','tries',
2591: 'awarddetail', 'response_specific', 'response_specific_value',
2592: 'response_specific_2', 'response_specific_value_2', and 'submission
2593: (the text of the students submission). The primary key is based on the
2594: first five columns listed above.
2595:
2596: =item C<$fulldump_part_table()>
2597:
2598: The part table holds data (documented in loncapa/docs/homework/datastorage)
2599: associated with a particular part id which is stored when a student attempts
2600: a problem. The following are the columns of the table, in order:
2601: 'symb_id','part_id','student_id','transaction','tries','award','awarded',
2602: and 'previous'. The primary key is based on the first five columns listed
2603: above.
2604:
2605: =item C<$fulldump_timestamp_table()>
2606:
2607: The timestamp table holds the timestamps of the transactions which are
2608: stored in $fulldump_response_table and $fulldump_part_table. This data is
2609: about both the response and part data. Columns: 'symb_id','student_id',
2610: 'transaction', and 'timestamp'.
2611: The primary key is based on the first 3 columns.
2612:
2613: =item C<$weight_table()>
2614:
2615: The weight table holds the weight for the problems used in the class.
2616: Whereas the weight of a problem can vary by section and student the data
2617: here is applied to the class as a whole.
2618: Columns: 'symb_id','part_id','response_id','weight'.
2619:
2620: =back
2621:
2622:
2623: =head1 IMPORTANT SUBROUTINES
2624:
2625: Here is a brief overview of the subroutines which are likely to be of
2626: interest:
2627:
2628: =over 4
2629:
2630: =item C<&get_current_state()>
2631:
2632: programmers interface.
2633:
2634: =item C<&init_dbs()>
2635:
2636: table creation
2637:
2638: =item C<&update_student_data()>
2639:
2640: data storage calls
2641:
2642: =item C<&get_student_data_from_performance_cache()>
2643:
2644: data retrieval
2645:
2646: =back
2647:
2648: =head1 OTHER SUBROUTINES
2649:
2650: =over 4
2651:
2652: =item C<&make_into_hash($values)>
2653:
2654: Returns a reference to a hash as described by $values. $values is
2655: assumed to be the result of
2656: join(':',map {&escape($_)} %orighash);
2657:
2658: This is a helper function for get_current_state.
2659:
2660: =item C<&init_dbs()>
2661:
2662: Input: course id
2663:
2664: Output: 0 on success, positive integer on error
2665:
2666: This routine issues the calls to lonmysql to create the tables used to
2667: store student data.
2668:
2669: item C<&delete_caches()>
2670:
2671: This routine drops all the tables associated with a course from the
2672: MySQL database.
2673:
2674: Input: course id (optional, determined by environment if omitted)
2675:
2676: Returns: nothing
2677:
2678: =item C<&get_part_id()>
2679:
2680: Get the MySQL id of a problem part string.
2681:
2682: Input: $part
2683:
2684: Output: undef on error, integer $part_id on success.
2685:
2686: =item C<&get_part()>
2687:
2688: Get the string describing a part from the MySQL id of the problem part.
2689:
2690: Input: $part_id
2691:
2692: Output: undef on error, $part string on success.
2693:
2694: =item C<&get_symb_id()>
2695:
2696: Get the MySQL id of a symb.
2697:
2698: Input: $symb
2699:
2700: Output: undef on error, integer $symb_id on success.
2701:
2702: =item C<&get_symb()>
2703:
2704: Get the symb associated with a MySQL symb_id.
2705:
2706: Input: $symb_id
2707:
2708: Output: undef on error, $symb on success.
2709:
2710: =item C<&get_student_id()>
2711:
2712: Get the MySQL id of a student.
2713:
2714: Input: $sname, $dom
2715:
2716: Output: undef on error, integer $student_id on success.
2717:
2718: =item C<&get_student()>
2719:
2720: Get student username:domain associated with the MySQL student_id.
2721:
2722: Input: $student_id
2723:
2724: Output: undef on error, string $student (username:domain) on success.
2725:
2726: =item C<&clear_internal_caches()>
2727:
2728: Causes the internal caches used in get_student_id, get_student,
2729: get_symb_id, get_symb, get_part_id, and get_part to be undef'd.
2730:
2731: Needs to be called before the first operation with the MySQL database
2732: for a given Apache request.
2733:
2734: =item C<&update_full_student_data($sname,$sdom,$courseid)>
2735:
2736: Does a lonnet::dump on a student to populate the courses tables.
2737:
2738: Input: $sname, $sdom, $courseid
2739:
2740: Output: $returnstatus
2741:
2742: $returnstatus is a string describing any errors that occurred. 'okay' is the
2743: default.
2744:
2745: This subroutine loads a students data using lonnet::dump and inserts
2746: it into the MySQL database. The inserts are done on three tables,
2747: $fulldump_response_table, $fulldump_part_table, and $fulldump_timestamp_table.
2748: The INSERT calls are made directly by this subroutine, not through lonmysql
2749: because we do a 'bulk'insert which takes advantage of MySQLs non-SQL
2750: compliant INSERT command to insert multiple rows at a time.
2751: If anything has gone wrong during this process, $returnstatus is updated with
2752: a description of the error.
2753:
2754: Once the "fulldump" tables are updated, the tables used for chart and
2755: spreadsheet (which hold only the current state of the student on their
2756: homework, not historical data) are updated. If all updates have occurred
2757: successfully, $student_table is updated to reflect the time of the update.
2758:
2759: Notice we do not insert the data and immediately query it. This means it
2760: is possible for there to be data returned this first time that is not
2761: available the second time. CYA.
2762:
2763:
2764: =item C<&update_student_data()>
2765:
2766: Input: $sname, $sdom, $courseid
2767:
2768: Output: $returnstatus, \%student_data
2769:
2770: $returnstatus is a string describing any errors that occurred. 'okay' is the
2771: default.
2772: \%student_data is the data returned by a call to lonnet::currentdump.
2773:
2774: This subroutine loads a students data using lonnet::currentdump and inserts
2775: it into the MySQL database. The inserts are done on two tables,
2776: $performance_table and $parameters_table. $parameters_table holds the data
2777: that is not included in $performance_table. See the description of
2778: $performance_table elsewhere in this file. The INSERT calls are made
2779: directly by this subroutine, not through lonmysql because we do a 'bulk'
2780: insert which takes advantage of MySQLs non-SQL compliant INSERT command to
2781: insert multiple rows at a time. If anything has gone wrong during this
2782: process, $returnstatus is updated with a description of the error and
2783: \%student_data is returned.
2784:
2785: Notice we do not insert the data and immediately query it. This means it
2786: is possible for there to be data returned this first time that is not
2787: available the second time. CYA.
2788:
2789: =item &ensure_tables_are_set_up($courseid)
2790:
2791: Checks to be sure the MySQL tables for the given class are set up.
2792: If $courseid is omitted it will be obtained from the environment.
2793:
2794: Returns nothing on success and 'error' on failure
2795:
2796:
2797: =item C<&ensure_current_data()>
2798:
2799: Input: $sname, $sdom, $courseid
2800:
2801: Output: $status, $data
2802:
2803: This routine ensures the data for a given student is up to date.
2804: The $student_table is queried to determine the time of the last update.
2805: If the students data is out of date, &update_student_data() is called.
2806: The return values from the call to &update_student_data() are returned.
2807:
2808: =item C<&ensure_current_full_data($sname,$sdom,$courseid)>
2809:
2810: Input: $sname, $sdom, $courseid
2811:
2812: Output: $status
2813:
2814: This routine ensures the fulldata (the data from a lonnet::dump, not a
2815: lonnet::currentdump) for a given student is up to date.
2816: The $student_table is queried to determine the time of the last update.
2817: If the students fulldata is out of date, &update_full_student_data() is
2818: called.
2819:
2820: The return value from the call to &update_full_student_data() is returned.
2821:
2822: =item C<&get_student_data_from_performance_cache()>
2823:
2824: Input: $sname, $sdom, $symb, $courseid
2825:
2826: Output: hash reference containing the data for the given student.
2827: If $symb is undef, all the students data is returned.
2828:
2829: This routine is the heart of the local caching system. See the description
2830: of $performance_table, $symb_table, $student_table, and $part_table. The
2831: main task is building the MySQL request. The tables appear in the request
2832: in the order in which they should be parsed by MySQL. When searching
2833: on a student the $student_table is used to locate the 'student_id'. All
2834: rows in $performance_table which have a matching 'student_id' are returned,
2835: with data from $part_table and $symb_table which match the entries in
2836: $performance_table, 'part_id' and 'symb_id'. When searching on a symb,
2837: the $symb_table is processed first, with matching rows grabbed from
2838: $performance_table and filled in from $part_table and $student_table in
2839: that order.
2840:
2841: Running 'EXPLAIN ' on the 'SELECT' statements generated can be quite
2842: interesting, especially if you play with the order the tables are listed.
2843:
2844:
2845: =item C<&get_current_state()>
2846:
2847: Input: $sname,$sdom,$symb,$courseid
2848:
2849: Output: Described below
2850:
2851: Retrieve the current status of a students performance. $sname and
2852: $sdom are the only required parameters. If $symb is undef the results
2853: of an &Apache::lonnet::currentdump() will be returned.
2854: If $courseid is undef it will be retrieved from the environment.
2855:
2856: The return structure is based on &Apache::lonnet::currentdump. If
2857: $symb is unspecified, all the students data is returned in a hash of
2858: the form:
2859: (
2860: symb1 => { param1 => value1, param2 => value2 ... },
2861: symb2 => { param1 => value1, param2 => value2 ... },
2862: )
2863:
2864: If $symb is specified, a hash of
2865: (
2866: param1 => value1,
2867: param2 => value2,
2868: )
2869: is returned.
2870:
2871: If no data is found for $symb, or if the student has no performance data,
2872: an empty list is returned.
2873:
2874: =item C<&get_problem_statistics()>
2875:
2876: Gather data on a given problem. The database is assumed to be
2877: populated and all local caching variables are assumed to be set
2878: properly. This means you need to call &ensure_current_data for
2879: the students you are concerned with prior to calling this routine.
2880:
2881: Inputs: $Sections, Groups, $status, $symb, $part, $courseid, $starttime,
2882: $endtime
2883:
2884: =over 4
2885:
2886: =item $Sections Array ref containing section names for students.
2887: 'all' is allowed to be the first (and only) item in the array.
2888:
2889: =item $Groups Array ref containing group names for students.
2890: 'all' is allowed to be the first (and only) item in the array.
2891:
2892: =item $status String describing the status of students
2893:
2894: =item $symb is the symb for the problem.
2895:
2896: =item $part is the part id you need statistics for
2897:
2898: =item $courseid is the course id, of course!
2899:
2900: =item $starttime and $endtime are unix times which to use to limit
2901: the statistical data.
2902:
2903: =back
2904:
2905: Outputs: See the code for up to date information. A hash reference is
2906: returned. The hash has the following keys defined:
2907:
2908: =over 4
2909:
2910: =item * num_students
2911:
2912: The number of students attempting the problem
2913:
2914: =item tries
2915:
2916: The total number of tries for the students
2917:
2918: =item max_tries
2919:
2920: The maximum number of tries taken
2921:
2922: =item mean_tries
2923:
2924: The average number of tries
2925:
2926: =item num_solved T
2927:
2928: he number of students able to solve the problem
2929:
2930: =item num_override
2931:
2932: The number of students whose answer is 'correct_by_override'
2933:
2934: =item deg_of_diff
2935:
2936: The degree of difficulty of the problem
2937:
2938: =item std_tries
2939:
2940: The standard deviation of the number of tries
2941:
2942: =item skew_tries
2943:
2944: The skew of the number of tries
2945:
2946: =item per_wrong
2947:
2948: The number of students attempting the problem who were not
2949: able to answer it correctly.
2950:
2951: =back
2952:
2953: =item C<&populate_weight_table()>
2954:
2955: =item C<&limit_by_start_end_times()>
2956:
2957: Build SQL WHERE condition which limits the data collected by the start
2958: and end times provided
2959:
2960: Inputs: $starttime, $endtime, $table
2961:
2962: Returns: $time_limits
2963:
2964:
2965: =item C<&limit_by_section_and_status()C<
2966:
2967: Build SQL WHERE condition which limits the data collected by section and
2968: student status.
2969:
2970: Inputs: $Sections (array ref)
2971: $enrollment (string: 'any', 'expired', 'active')
2972: $tablename The name of the table that holds the student data
2973:
2974: Returns: $student_requirements,$enrollment_requirements
2975:
2976: =item C<&limit_by_group()>
2977:
2978: Build SQL LEFT JOIN statement to include students_groups and groupnames tables and SQL WHERE condition which limits the data collected by group.
2979:
2980: Inputs: $Groups (array ref)
2981: $stutable The name of the table which holds the student data.
2982: $grptable The name of the table which maps group_id to groupname.
2983: $stugrptab The name of the table which holds student group affiliations.
2984: Returns: $groups_join,$group_limits
2985: $groups_join JOIN part of SQL statement (to include group related tables)
2986: $group_limits SQL WHERE condition limiting to requested groups
2987:
2988: =item C<rank_students_by_scores_on_resources()>
2989:
2990: Inputs:
2991: $resources: array ref of hash ref. Each hash ref needs key 'symb'.
2992: $Sections: array ref of sections to include,
2993: $Groups: array ref of groups to include.
2994: $enrollment: string,
2995: $courseid (may be omitted)
2996: $starttime (may be omitted)
2997: $endtime (may be omitted)
2998: $has_award_for (may be omitted)
2999:
3000: Returns; An array of arrays. The sub arrays contain a student name and
3001: their score on the resources. $starttime and $endtime constrain the
3002: list to awards obtained during the given time limits. $has_score_on
3003: constrains the list to those students who at least attempted the
3004: resource identified by the given symb, which is used to filter out
3005: such students for statistics that would be adversely affected by such
3006: students.
3007:
3008: =item C<&get_sum_of_scores>
3009:
3010: Inputs: $resource (hash ref, needs {'symb'} key),
3011: $part, (the part id),
3012: $students (array ref, contents of array are scalars holding 'sname:sdom'),
3013: $courseid
3014:
3015: Returns: the sum of the score on the problem part over the students and the
3016: maximum possible value for the sum (taken from the weight table).
3017:
3018:
3019: =item C<&score_stats()>
3020:
3021: Inputs: $Sections, $enrollment, $symbs, $starttime,
3022: $endtime, $courseid
3023:
3024: $Sections, $enrollment, $starttime, $endtime, and $courseid are the same as
3025: elsewhere in this module.
3026: $symbs is an array ref of symbs
3027:
3028: Returns: minimum, maximum, mean, s.d., number of students, and maximum
3029: possible of student scores on the given resources
3030:
3031: =item C<&count_stats()>
3032:
3033: Inputs: $Sections, $Groups, $enrollment, $symbs, $starttime,
3034: $endtime, $courseid
3035:
3036: $Sections, $Groups $enrollment, $starttime, $endtime, and $courseid are the
3037: same as elsewhere in this module.
3038: $symbs is an array ref of symbs
3039:
3040: Returns: minimum, maximum, mean, s.d., and number of students
3041: of the number of items correct on the given resources
3042:
3043: =item C<get_student_data()>
3044:
3045: =item C<&get_student_scores($Sections,$Groups,$Symbs,$enrollment,$courseid)>
3046:
3047: =item C<&setup_table_names()>
3048:
3049: input: course id
3050:
3051: output: none
3052:
3053: =back
3054:
3055: =head3 End of Local Data Caching Subroutines
3056:
3057: =head3 Classlist Subroutines
3058:
3059: =over
3060:
3061: =item &get_classlist();
3062:
3063: Retrieve the classist of a given class or of the current class. Student
3064: information is returned from the classlist.db file and, if needed,
3065: from the students environment.
3066:
3067: Optional arguments are $cdom, and $cnum (course domain,
3068: and course number, respectively). If either is ommitted the course
3069: will be taken from the current environment ($env{'request.course.id'},
3070: $env{'course.'.$cid.'.domain'}, and $env{'course.'.$cid.'.num'}).
3071:
3072: Returns a reference to a hash which contains:
3073: keys '$sname:$sdom'
3074: values [$sdom,$sname,$end,$start,$id,$section,$fullname,$status,$type,$lockedtype]
3075:
3076: The constant values CL_SDOM, CL_SNAME, CL_END, etc. can be used
3077: as indices into the returned list to future-proof clients against
3078: changes in the list order.
3079:
3080: =back
3081:
3082: =cut
3083:
3084:
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