Annotation of loncom/interface/loncoursedata.pm, revision 1.197
1.1 stredwic 1: # The LearningOnline Network with CAPA
2: #
1.197 ! raeburn 3: # $Id: loncoursedata.pm,v 1.196 2015/03/10 02:45:56 raeburn Exp $
1.1 stredwic 4: #
5: # Copyright Michigan State University Board of Trustees
6: #
7: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
8: #
9: # LON-CAPA is free software; you can redistribute it and/or modify
10: # it under the terms of the GNU General Public License as published by
11: # the Free Software Foundation; either version 2 of the License, or
12: # (at your option) any later version.
13: #
14: # LON-CAPA is distributed in the hope that it will be useful,
15: # but WITHOUT ANY WARRANTY; without even the implied warranty of
16: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17: # GNU General Public License for more details.
18: #
19: # You should have received a copy of the GNU General Public License
20: # along with LON-CAPA; if not, write to the Free Software
21: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22: #
23: # /home/httpd/html/adm/gpl.txt
24: #
25: # http://www.lon-capa.org/
26: #
27: ###
28: =pod
29:
30: =head1 NAME
31:
1.189 jms 32: Apache::loncoursedata
1.1 stredwic 33:
34: =head1 SYNOPSIS
35:
1.22 stredwic 36: Set of functions that download and process student and course information.
1.1 stredwic 37:
38: =head1 PACKAGES USED
39:
1.181 albertel 40: Apache::lonnet
41: Apache::longroup
42: Time::HiRes
43: Apache::lonmysql
44: LONCAPA
45: Digest::MD5
1.190 jms 46:
1.1 stredwic 47: =cut
48:
49: package Apache::loncoursedata;
50:
51: use strict;
1.146 albertel 52: use Apache::lonnet;
1.181 albertel 53: use Apache::longroup();
54: use Time::HiRes();
55: use Apache::lonmysql();
1.173 www 56: use LONCAPA;
1.181 albertel 57: use Digest::MD5();
1.1 stredwic 58:
1.191 foxr 59: =pod
60:
1.193 raeburn 61: =head2 make_into_hash
1.191 foxr 62:
63: Turn a colon separated string into a hash and return a reference
64: to it. Numbering from 0 even elements are keys and odd elements
65: are values e.g. a:b:c:d creates a hash like
66: a => b, c =>d
67:
68: =cut
69:
1.47 matthew 70: sub make_into_hash {
71: my $values = shift;
1.173 www 72: my %tmp = map { &unescape($_); } split(':',$values);
1.47 matthew 73: return \%tmp;
74: }
75:
76:
1.89 matthew 77: { # Begin scope of table identifiers
1.57 matthew 78:
79: my $current_course ='';
80: my $symb_table;
81: my $part_table;
82: my $student_table;
1.167 raeburn 83: my $groupnames_table;
84: my $students_groups_table;
1.57 matthew 85: my $performance_table;
86: my $parameters_table;
1.89 matthew 87: my $fulldump_response_table;
88: my $fulldump_part_table;
89: my $fulldump_timestamp_table;
1.127 matthew 90: my $weight_table;
1.57 matthew 91:
1.89 matthew 92: my @Tables;
1.57 matthew 93:
94:
95:
96: sub init_dbs {
1.134 matthew 97: my ($courseid,$drop) = @_;
1.57 matthew 98: &setup_table_names($courseid);
99: #
1.73 matthew 100: # Drop any of the existing tables
1.134 matthew 101: if ($drop) {
102: foreach my $table (@Tables) {
103: &Apache::lonmysql::drop_table($table);
104: }
1.73 matthew 105: }
106: #
1.57 matthew 107: # Note - changes to this table must be reflected in the code that
108: # stores the data (calls &Apache::lonmysql::store_row with this table
109: # id
110: my $symb_table_def = {
111: id => $symb_table,
112: permanent => 'no',
113: columns => [{ name => 'symb_id',
114: type => 'MEDIUMINT UNSIGNED',
115: restrictions => 'NOT NULL',
116: auto_inc => 'yes', },
117: { name => 'symb',
118: type => 'MEDIUMTEXT',
119: restrictions => 'NOT NULL'},
120: ],
121: 'PRIMARY KEY' => ['symb_id'],
122: };
123: #
124: my $part_table_def = {
125: id => $part_table,
126: permanent => 'no',
127: columns => [{ name => 'part_id',
128: type => 'MEDIUMINT UNSIGNED',
129: restrictions => 'NOT NULL',
130: auto_inc => 'yes', },
131: { name => 'part',
1.132 matthew 132: type => 'VARCHAR(100) BINARY',
1.57 matthew 133: restrictions => 'NOT NULL'},
134: ],
135: 'PRIMARY KEY' => ['part (100)'],
136: 'KEY' => [{ columns => ['part_id']},],
137: };
138: #
139: my $student_table_def = {
140: id => $student_table,
141: permanent => 'no',
142: columns => [{ name => 'student_id',
143: type => 'MEDIUMINT UNSIGNED',
144: restrictions => 'NOT NULL',
145: auto_inc => 'yes', },
146: { name => 'student',
1.132 matthew 147: type => 'VARCHAR(100) BINARY',
1.113 matthew 148: restrictions => 'NOT NULL UNIQUE'},
149: { name => 'section',
1.132 matthew 150: type => 'VARCHAR(100) BINARY',
1.113 matthew 151: restrictions => 'NOT NULL'},
1.178 albertel 152: { name => 'start',
153: type => 'INT',
154: restrictions => 'NOT NULL'},
155: { name => 'end',
156: type => 'INT',
1.57 matthew 157: restrictions => 'NOT NULL'},
1.85 matthew 158: { name => 'classification',
1.132 matthew 159: type => 'VARCHAR(100) BINARY', },
1.57 matthew 160: { name => 'updatetime',
1.89 matthew 161: type => 'INT UNSIGNED'},
162: { name => 'fullupdatetime',
163: type => 'INT UNSIGNED'},
1.57 matthew 164: ],
1.87 matthew 165: 'PRIMARY KEY' => ['student_id'],
1.113 matthew 166: 'KEY' => [{ columns => ['student (100)',
167: 'section (100)',
1.178 albertel 168: 'start',
169: 'end']},],
1.57 matthew 170: };
171: #
1.167 raeburn 172: my $groupnames_table_def = {
173: id => $groupnames_table,
174: permanent => 'no',
175: columns => [{ name => 'group_id',
176: type => 'MEDIUMINT UNSIGNED',
177: restrictions => 'NOT NULL',
178: auto_inc => 'yes', },
179: { name => 'groupname',
180: type => 'VARCHAR(100) BINARY',
181: restrictions => 'NOT NULL UNIQUE'},
182: ],
183: 'PRIMARY KEY' => ['group_id'],
184: 'KEY' => [{ columns => ['groupname (100)',]},],
185: };
186: #
187: my $students_groups_table_def = {
188: id => $students_groups_table,
189: permanent => 'no',
190: columns => [{ name => 'student_id',
191: type => 'MEDIUMINT UNSIGNED',
192: restrictions => 'NOT NULL', },
193: { name => 'group_id',
194: type => 'MEDIUMINT UNSIGNED',
195: restrictions => 'NOT NULL', },
196: ],
197: 'PRIMARY KEY' => ['student_id','group_id'],
198: 'KEY' => [{ columns => ['student_id'] },
199: { columns => ['group_id'] },],
200: };
201: #
1.57 matthew 202: my $performance_table_def = {
203: id => $performance_table,
204: permanent => 'no',
205: columns => [{ name => 'symb_id',
206: type => 'MEDIUMINT UNSIGNED',
207: restrictions => 'NOT NULL' },
208: { name => 'student_id',
209: type => 'MEDIUMINT UNSIGNED',
210: restrictions => 'NOT NULL' },
211: { name => 'part_id',
212: type => 'MEDIUMINT UNSIGNED',
213: restrictions => 'NOT NULL' },
1.73 matthew 214: { name => 'part',
1.132 matthew 215: type => 'VARCHAR(100) BINARY',
1.73 matthew 216: restrictions => 'NOT NULL'},
1.57 matthew 217: { name => 'solved',
218: type => 'TINYTEXT' },
219: { name => 'tries',
220: type => 'SMALLINT UNSIGNED' },
221: { name => 'awarded',
1.127 matthew 222: type => 'REAL' },
1.57 matthew 223: { name => 'award',
224: type => 'TINYTEXT' },
225: { name => 'awarddetail',
226: type => 'TINYTEXT' },
227: { name => 'timestamp',
228: type => 'INT UNSIGNED'},
229: ],
230: 'PRIMARY KEY' => ['symb_id','student_id','part_id'],
231: 'KEY' => [{ columns=>['student_id'] },
232: { columns=>['symb_id'] },],
233: };
234: #
1.89 matthew 235: my $fulldump_part_table_def = {
236: id => $fulldump_part_table,
237: permanent => 'no',
238: columns => [
239: { name => 'symb_id',
240: type => 'MEDIUMINT UNSIGNED',
241: restrictions => 'NOT NULL' },
242: { name => 'part_id',
243: type => 'MEDIUMINT UNSIGNED',
244: restrictions => 'NOT NULL' },
245: { name => 'student_id',
246: type => 'MEDIUMINT UNSIGNED',
247: restrictions => 'NOT NULL' },
248: { name => 'transaction',
249: type => 'MEDIUMINT UNSIGNED',
250: restrictions => 'NOT NULL' },
251: { name => 'tries',
252: type => 'SMALLINT UNSIGNED',
253: restrictions => 'NOT NULL' },
254: { name => 'award',
255: type => 'TINYTEXT' },
256: { name => 'awarded',
1.127 matthew 257: type => 'REAL' },
1.89 matthew 258: { name => 'previous',
259: type => 'SMALLINT UNSIGNED' },
260: # { name => 'regrader',
261: # type => 'TINYTEXT' },
262: # { name => 'afterduedate',
263: # type => 'TINYTEXT' },
264: ],
265: 'PRIMARY KEY' => ['symb_id','part_id','student_id','transaction'],
266: 'KEY' => [
267: { columns=>['symb_id'] },
268: { columns=>['part_id'] },
269: { columns=>['student_id'] },
270: ],
271: };
272: #
273: my $fulldump_response_table_def = {
274: id => $fulldump_response_table,
275: permanent => 'no',
276: columns => [
277: { name => 'symb_id',
278: type => 'MEDIUMINT UNSIGNED',
279: restrictions => 'NOT NULL' },
280: { name => 'part_id',
281: type => 'MEDIUMINT UNSIGNED',
282: restrictions => 'NOT NULL' },
283: { name => 'response_id',
284: type => 'MEDIUMINT UNSIGNED',
285: restrictions => 'NOT NULL' },
286: { name => 'student_id',
287: type => 'MEDIUMINT UNSIGNED',
288: restrictions => 'NOT NULL' },
289: { name => 'transaction',
290: type => 'MEDIUMINT UNSIGNED',
291: restrictions => 'NOT NULL' },
292: { name => 'awarddetail',
293: type => 'TINYTEXT' },
294: # { name => 'message',
1.132 matthew 295: # type => 'CHAR BINARY'},
1.89 matthew 296: { name => 'response_specific',
297: type => 'TINYTEXT' },
298: { name => 'response_specific_value',
299: type => 'TINYTEXT' },
1.159 albertel 300: { name => 'response_specific_2',
301: type => 'TINYTEXT' },
302: { name => 'response_specific_value_2',
303: type => 'TINYTEXT' },
1.89 matthew 304: { name => 'submission',
305: type => 'TEXT'},
306: ],
307: 'PRIMARY KEY' => ['symb_id','part_id','response_id','student_id',
308: 'transaction'],
309: 'KEY' => [
310: { columns=>['symb_id'] },
311: { columns=>['part_id','response_id'] },
312: { columns=>['student_id'] },
313: ],
314: };
315: my $fulldump_timestamp_table_def = {
316: id => $fulldump_timestamp_table,
317: permanent => 'no',
318: columns => [
319: { name => 'symb_id',
320: type => 'MEDIUMINT UNSIGNED',
321: restrictions => 'NOT NULL' },
322: { name => 'student_id',
323: type => 'MEDIUMINT UNSIGNED',
324: restrictions => 'NOT NULL' },
325: { name => 'transaction',
326: type => 'MEDIUMINT UNSIGNED',
327: restrictions => 'NOT NULL' },
328: { name => 'timestamp',
329: type => 'INT UNSIGNED'},
330: ],
331: 'PRIMARY KEY' => ['symb_id','student_id','transaction'],
332: 'KEY' => [
333: { columns=>['symb_id'] },
334: { columns=>['student_id'] },
335: { columns=>['transaction'] },
336: ],
337: };
338: #
1.57 matthew 339: my $parameters_table_def = {
340: id => $parameters_table,
341: permanent => 'no',
342: columns => [{ name => 'symb_id',
343: type => 'MEDIUMINT UNSIGNED',
344: restrictions => 'NOT NULL' },
345: { name => 'student_id',
346: type => 'MEDIUMINT UNSIGNED',
347: restrictions => 'NOT NULL' },
348: { name => 'parameter',
349: type => 'TINYTEXT',
350: restrictions => 'NOT NULL' },
351: { name => 'value',
352: type => 'MEDIUMTEXT' },
353: ],
354: 'PRIMARY KEY' => ['symb_id','student_id','parameter (255)'],
355: };
356: #
1.127 matthew 357: my $weight_table_def = {
358: id => $weight_table,
359: permanent => 'no',
360: columns => [{ name => 'symb_id',
361: type => 'MEDIUMINT UNSIGNED',
362: restrictions => 'NOT NULL' },
363: { name => 'part_id',
364: type => 'MEDIUMINT UNSIGNED',
365: restrictions => 'NOT NULL' },
366: { name => 'weight',
367: type => 'REAL',
368: restrictions => 'NOT NULL' },
369: ],
370: 'PRIMARY KEY' => ['symb_id','part_id'],
371: };
372: #
1.57 matthew 373: # Create the tables
374: my $tableid;
375: $tableid = &Apache::lonmysql::create_table($symb_table_def);
376: if (! defined($tableid)) {
377: &Apache::lonnet::logthis("error creating symb_table: ".
378: &Apache::lonmysql::get_error());
379: return 1;
380: }
381: #
382: $tableid = &Apache::lonmysql::create_table($part_table_def);
383: if (! defined($tableid)) {
384: &Apache::lonnet::logthis("error creating part_table: ".
385: &Apache::lonmysql::get_error());
386: return 2;
387: }
388: #
389: $tableid = &Apache::lonmysql::create_table($student_table_def);
390: if (! defined($tableid)) {
391: &Apache::lonnet::logthis("error creating student_table: ".
392: &Apache::lonmysql::get_error());
393: return 3;
394: }
395: #
396: $tableid = &Apache::lonmysql::create_table($performance_table_def);
397: if (! defined($tableid)) {
398: &Apache::lonnet::logthis("error creating preformance_table: ".
399: &Apache::lonmysql::get_error());
400: return 5;
401: }
402: #
403: $tableid = &Apache::lonmysql::create_table($parameters_table_def);
404: if (! defined($tableid)) {
405: &Apache::lonnet::logthis("error creating parameters_table: ".
406: &Apache::lonmysql::get_error());
407: return 6;
408: }
1.89 matthew 409: #
410: $tableid = &Apache::lonmysql::create_table($fulldump_part_table_def);
411: if (! defined($tableid)) {
412: &Apache::lonnet::logthis("error creating fulldump_part_table: ".
413: &Apache::lonmysql::get_error());
414: return 7;
415: }
416: #
417: $tableid = &Apache::lonmysql::create_table($fulldump_response_table_def);
418: if (! defined($tableid)) {
419: &Apache::lonnet::logthis("error creating fulldump_response_table: ".
420: &Apache::lonmysql::get_error());
421: return 8;
422: }
423: $tableid = &Apache::lonmysql::create_table($fulldump_timestamp_table_def);
424: if (! defined($tableid)) {
425: &Apache::lonnet::logthis("error creating fulldump_timestamp_table: ".
426: &Apache::lonmysql::get_error());
427: return 9;
428: }
1.127 matthew 429: $tableid = &Apache::lonmysql::create_table($weight_table_def);
430: if (! defined($tableid)) {
431: &Apache::lonnet::logthis("error creating weight_table: ".
432: &Apache::lonmysql::get_error());
433: return 10;
434: }
1.167 raeburn 435: $tableid = &Apache::lonmysql::create_table($groupnames_table_def);
436: if (! defined($tableid)) {
437: &Apache::lonnet::logthis("error creating groupnames_table: ".
438: &Apache::lonmysql::get_error());
439: return 11;
440: }
441: $tableid = &Apache::lonmysql::create_table($students_groups_table_def);
442: if (! defined($tableid)) {
443: &Apache::lonnet::logthis("error creating student_groups_table: ".
444: &Apache::lonmysql::get_error());
445: return 12;
446: }
1.57 matthew 447: return 0;
1.70 matthew 448: }
449:
1.191 foxr 450: =pod
451:
452: =head2 delete_caches
1.70 matthew 453:
1.191 foxr 454: Drops all of the tables in the local mysql cache associated with the
455: specified course id.
1.70 matthew 456:
1.192 raeburn 457: TODO: The drops should be pushed into lonmysql to further isolate
1.191 foxr 458: mysql code from other modules.
459:
460: =cut
1.70 matthew 461: sub delete_caches {
462: my $courseid = shift;
1.146 albertel 463: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.70 matthew 464: #
465: &setup_table_names($courseid);
466: #
467: my $dbh = &Apache::lonmysql::get_dbh();
1.89 matthew 468: foreach my $table (@Tables) {
1.70 matthew 469: my $command = 'DROP TABLE '.$table.';';
470: $dbh->do($command);
471: if ($dbh->err) {
472: &Apache::lonnet::logthis($command.' resulted in error: '.$dbh->errstr);
473: }
474: }
475: return;
1.57 matthew 476: }
477:
478:
1.61 matthew 479: my $have_read_part_table = 0;
1.57 matthew 480: my %ids_by_part;
481: my %parts_by_id;
482:
483: sub get_part_id {
484: my ($part) = @_;
1.61 matthew 485: $part = 0 if (! defined($part));
486: if (! $have_read_part_table) {
487: my @Result = &Apache::lonmysql::get_rows($part_table);
488: foreach (@Result) {
489: $ids_by_part{$_->[1]}=$_->[0];
490: }
491: $have_read_part_table = 1;
492: }
1.57 matthew 493: if (! exists($ids_by_part{$part})) {
494: &Apache::lonmysql::store_row($part_table,[undef,$part]);
495: undef(%ids_by_part);
496: my @Result = &Apache::lonmysql::get_rows($part_table);
497: foreach (@Result) {
498: $ids_by_part{$_->[1]}=$_->[0];
499: }
500: }
501: return $ids_by_part{$part} if (exists($ids_by_part{$part}));
502: return undef; # error
503: }
504:
505: sub get_part {
506: my ($part_id) = @_;
507: if (! exists($parts_by_id{$part_id}) ||
508: ! defined($parts_by_id{$part_id}) ||
509: $parts_by_id{$part_id} eq '') {
510: my @Result = &Apache::lonmysql::get_rows($part_table);
511: foreach (@Result) {
512: $parts_by_id{$_->[0]}=$_->[1];
513: }
514: }
515: return $parts_by_id{$part_id} if(exists($parts_by_id{$part_id}));
516: return undef; # error
517: }
518:
519:
1.61 matthew 520: my $have_read_symb_table = 0;
1.57 matthew 521: my %ids_by_symb;
522: my %symbs_by_id;
523:
524: sub get_symb_id {
525: my ($symb) = @_;
1.61 matthew 526: if (! $have_read_symb_table) {
527: my @Result = &Apache::lonmysql::get_rows($symb_table);
528: foreach (@Result) {
529: $ids_by_symb{$_->[1]}=$_->[0];
530: }
531: $have_read_symb_table = 1;
532: }
1.57 matthew 533: if (! exists($ids_by_symb{$symb})) {
534: &Apache::lonmysql::store_row($symb_table,[undef,$symb]);
535: undef(%ids_by_symb);
536: my @Result = &Apache::lonmysql::get_rows($symb_table);
537: foreach (@Result) {
538: $ids_by_symb{$_->[1]}=$_->[0];
539: }
540: }
541: return $ids_by_symb{$symb} if(exists( $ids_by_symb{$symb}));
542: return undef; # error
543: }
544:
545: sub get_symb {
546: my ($symb_id) = @_;
547: if (! exists($symbs_by_id{$symb_id}) ||
548: ! defined($symbs_by_id{$symb_id}) ||
549: $symbs_by_id{$symb_id} eq '') {
550: my @Result = &Apache::lonmysql::get_rows($symb_table);
551: foreach (@Result) {
552: $symbs_by_id{$_->[0]}=$_->[1];
553: }
554: }
555: return $symbs_by_id{$symb_id} if(exists( $symbs_by_id{$symb_id}));
556: return undef; # error
557: }
558:
1.190 jms 559: my $have_read_student_table = 0;
560: my %ids_by_student;
561: my %students_by_id;
1.57 matthew 562:
1.190 jms 563: sub get_student_id {
564: my ($sname,$sdom) = @_;
565: my $student = $sname.':'.$sdom;
566: if (! $have_read_student_table) {
567: my @Result = &Apache::lonmysql::get_rows($student_table);
568: foreach (@Result) {
569: $ids_by_student{$_->[1]}=$_->[0];
570: }
571: $have_read_student_table = 1;
572: }
573: if (! exists($ids_by_student{$student})) {
574: &populate_student_table();
575: undef(%ids_by_student);
576: undef(%students_by_id);
577: my @Result = &Apache::lonmysql::get_rows($student_table);
1.57 matthew 578: foreach (@Result) {
579: $ids_by_student{$_->[1]}=$_->[0];
580: }
581: }
582: return $ids_by_student{$student} if(exists( $ids_by_student{$student}));
583: return undef; # error
584: }
585:
586: sub get_student {
587: my ($student_id) = @_;
588: if (! exists($students_by_id{$student_id}) ||
589: ! defined($students_by_id{$student_id}) ||
590: $students_by_id{$student_id} eq '') {
591: my @Result = &Apache::lonmysql::get_rows($student_table);
592: foreach (@Result) {
593: $students_by_id{$_->[0]}=$_->[1];
594: }
595: }
596: return $students_by_id{$student_id} if(exists($students_by_id{$student_id}));
597: return undef; # error
598: }
1.99 matthew 599:
1.113 matthew 600: sub populate_student_table {
601: my ($courseid) = @_;
602: if (! defined($courseid)) {
1.146 albertel 603: $courseid = $env{'request.course.id'};
1.113 matthew 604: }
605: #
606: &setup_table_names($courseid);
1.134 matthew 607: &init_dbs($courseid,0);
1.113 matthew 608: my $dbh = &Apache::lonmysql::get_dbh();
609: my $request = 'INSERT IGNORE INTO '.$student_table.
1.178 albertel 610: "(student,section,start,end) VALUES ";
1.150 albertel 611: my $cdom = $env{'course.'.$courseid.'.domain'};
612: my $cnum = $env{'course.'.$courseid.'.num'};
613: my $classlist = &get_classlist($cdom,$cnum);
1.113 matthew 614: my $student_count=0;
615: while (my ($student,$data) = each %$classlist) {
1.178 albertel 616: my ($section,$start,$end) = ($data->[&CL_SECTION()],
617: $data->[&CL_START()],
618: $data->[&CL_END()]);
1.113 matthew 619: if ($section eq '' || $section =~ /^\s*$/) {
620: $section = 'none';
621: }
1.178 albertel 622: if (!defined($start)) { $start = 0; }
623: if (!defined($end)) { $end = 0; }
624: $request .= "('".$student."','".$section."','".$start."','".$end."'),";
1.113 matthew 625: $student_count++;
626: }
627: return if ($student_count == 0);
628: chop($request);
629: $dbh->do($request);
630: if ($dbh->err()) {
631: &Apache::lonnet::logthis("error ".$dbh->errstr().
1.188 bisitz 632: " occurred executing \n".
1.113 matthew 633: $request);
634: }
635: return;
636: }
637:
1.167 raeburn 638: my $have_read_groupnames_table = 0;
639: my %ids_by_groupname;
640:
641: sub get_group_id {
642: my ($groupname) = @_;
643: if (! $have_read_groupnames_table) {
644: my @Result = &Apache::lonmysql::get_rows($groupnames_table);
645: foreach (@Result) {
646: $ids_by_groupname{$_->[1]}=$_->[0];
647: }
648: $have_read_groupnames_table = 1;
649: }
650: if (! exists($ids_by_groupname{$groupname})) {
651: &populate_groupnames_table();
652: undef(%ids_by_groupname);
653: my @Result = &Apache::lonmysql::get_rows($groupnames_table);
654: foreach (@Result) {
655: $ids_by_groupname{$_->[1]}=$_->[0];
656: }
657: }
658: if (exists($ids_by_groupname{$groupname})) {
659: return $ids_by_groupname{$groupname};
660: }
661: return undef; # error
662: }
663:
664: sub populate_groupnames_table {
665: my ($courseid) = @_;
666: if (! defined($courseid)) {
667: $courseid = $env{'request.course.id'};
668: }
669: &setup_table_names($courseid);
670: &init_dbs($courseid,0);
671: my $dbh = &Apache::lonmysql::get_dbh();
672: my $cdom = $env{'course.'.$courseid.'.domain'};
673: my $cnum = $env{'course.'.$courseid.'.num'};
1.171 raeburn 674: my %curr_groups = &Apache::longroup::coursegroups($cdom,$cnum);
1.169 albertel 675: return if (!%curr_groups);
1.167 raeburn 676: my $request = 'INSERT IGNORE INTO '.$groupnames_table.
677: '(groupname) VALUES ';
678: foreach my $groupname (sort(keys(%curr_groups)),'none') {
679: $request .= "('".$groupname."'),";
680: }
681: chop($request);
682: $dbh->do($request);
683: if ($dbh->err()) {
684: &Apache::lonnet::logthis("error ".$dbh->errstr().
1.188 bisitz 685: " occurred executing \n".
1.167 raeburn 686: $request);
687: }
688: return;
689: }
690:
691: my $have_read_studentsgroups_table = 0;
692: my %groupids_by_studentid;
693:
694: sub get_students_groupids {
695: my ($student_id) = @_;
696: if (! $have_read_studentsgroups_table) {
697: my @Result = &Apache::lonmysql::get_rows($students_groups_table);
698: foreach (@Result) {
699: push(@{$groupids_by_studentid{$_->[0]}},$_->[1]);
700: }
701: $have_read_studentsgroups_table = 1;
702: }
703: if (! exists($groupids_by_studentid{$student_id})) {
704: &populate_students_groups_table();
705: undef(%groupids_by_studentid);
706: my @Result = &Apache::lonmysql::get_rows($students_groups_table);
707: foreach (@Result) {
708: push(@{$groupids_by_studentid{$_->[0]}},$_->[1]);
709: }
710: }
711: if (exists($groupids_by_studentid{$student_id})) {
712: if (ref($groupids_by_studentid{$student_id}) eq 'ARRAY') {
713: return @{$groupids_by_studentid{$student_id}};
714: }
715: }
716: return undef; # error
717: }
718:
719:
720: sub populate_students_groups_table {
721: my ($courseid) = @_;
722: if (! defined($courseid)) {
723: $courseid = $env{'request.course.id'};
724: }
725: #
726: &setup_table_names($courseid);
727: &init_dbs($courseid,0);
728: my $dbh = &Apache::lonmysql::get_dbh();
729: my $request = 'INSERT IGNORE INTO '.$students_groups_table.
730: "(student_id,group_id) VALUES ";
731: my $cdom = $env{'course.'.$courseid.'.domain'};
732: my $cnum = $env{'course.'.$courseid.'.num'};
1.170 raeburn 733: my ($classlist,$keylist) = &get_classlist($cdom,$cnum);
1.167 raeburn 734: my ($classgroups,$studentgroups) = &get_group_memberships($classlist,
1.170 raeburn 735: $keylist,
1.167 raeburn 736: $cdom,$cnum);
737: my $record_count = 0;
738: foreach my $student (sort(keys(%{$classgroups}))) {
739: my $student_id = &get_student_id(split(':',$student));
740: my @studentsgroups = &get_students_groups($student,'Active',$classgroups);
741: if (@studentsgroups < 1) {
742: @studentsgroups = ('none');
743: }
744: foreach my $groupname (@studentsgroups) {
745: my $group_id = &get_group_id($groupname);
746: $request .= "('".$student_id."','".$group_id."'),";
747: $record_count++;
748: }
749: }
750: return if ($record_count == 0);
751: chop($request);
752: $dbh->do($request);
753: if ($dbh->err()) {
754: &Apache::lonnet::logthis("error ".$dbh->errstr().
1.188 bisitz 755: " occurred executing \n".
1.167 raeburn 756: $request);
757: }
758: return;
759: }
760:
1.99 matthew 761: sub clear_internal_caches {
762: $have_read_part_table = 0;
763: undef(%ids_by_part);
764: undef(%parts_by_id);
765: $have_read_symb_table = 0;
766: undef(%ids_by_symb);
767: undef(%symbs_by_id);
768: $have_read_student_table = 0;
769: undef(%ids_by_student);
770: undef(%students_by_id);
1.167 raeburn 771: $have_read_groupnames_table = 0;
772: undef(%ids_by_groupname);
1.99 matthew 773: }
774:
1.164 albertel 775: sub symb_is_for_task {
776: my ($symb) = @_;
777: return ($symb =~ /\.task$/);
778: }
779:
1.89 matthew 780:
781: sub update_full_student_data {
782: my ($sname,$sdom,$courseid) = @_;
783: #
784: # Set up database names
785: &setup_table_names($courseid);
786: #
787: my $student_id = &get_student_id($sname,$sdom);
788: my $student = $sname.':'.$sdom;
789: #
790: my $returnstatus = 'okay';
791: #
792: # Download students data
793: my $time_of_retrieval = time;
1.157 albertel 794: my @tmp = &Apache::lonnet::dumpstore($courseid,$sdom,$sname);
1.89 matthew 795: if (@tmp && $tmp[0] =~ /^error/) {
796: $returnstatus = 'error retrieving full student data';
797: return $returnstatus;
798: } elsif (! @tmp) {
799: $returnstatus = 'okay: no student data';
800: return $returnstatus;
801: }
802: my %studentdata = @tmp;
803: #
804: # Get database handle and clean out the tables
805: my $dbh = &Apache::lonmysql::get_dbh();
806: $dbh->do('DELETE FROM '.$fulldump_response_table.' WHERE student_id='.
807: $student_id);
808: $dbh->do('DELETE FROM '.$fulldump_part_table.' WHERE student_id='.
809: $student_id);
810: $dbh->do('DELETE FROM '.$fulldump_timestamp_table.' WHERE student_id='.
811: $student_id);
812: #
813: # Parse and store the data into a form we can handle
814: my $partdata;
815: my $respdata;
816: while (my ($key,$value) = each(%studentdata)) {
817: next if ($key =~ /^(\d+):(resource$|subnum$|keys:)/);
818: my ($transaction,$symb,$parameter) = split(':',$key);
1.179 albertel 819: $symb = &unescape($symb);
820: $parameter = &unescape($parameter);
1.89 matthew 821: my $symb_id = &get_symb_id($symb);
822: if ($parameter eq 'timestamp') {
823: # We can deal with 'timestamp' right away
824: my @timestamp_storage = ($symb_id,$student_id,
825: $transaction,$value);
1.98 matthew 826: my $store_command = 'INSERT IGNORE INTO '.$fulldump_timestamp_table.
1.89 matthew 827: " VALUES ('".join("','",@timestamp_storage)."');";
828: $dbh->do($store_command);
829: if ($dbh->err()) {
830: &Apache::lonnet::logthis('unable to execute '.$store_command);
831: &Apache::lonnet::logthis($dbh->errstr());
832: }
833: next;
834: } elsif ($parameter eq 'version') {
835: next;
1.165 albertel 836: } elsif (&symb_is_for_task($symb)) {
837: next if ($parameter !~ /^resource\.(.*)\.(award|
838: awarded|
839: solved|
840: submission|
841: portfiles|
842: status|
843: version|
844: regrader)\s*$/x);
845: my ($version_and_part_id, $field) = ($1,$2);
846:
847: next if ($version_and_part_id !~ /\./
848: && $field ne 'regrader' && $field ne 'version');
849:
850: my ($version, $part, $instance) =
851: split(/\./,$version_and_part_id);
852:
853: #skip and instance dimension or criteria specific data
854: next if (defined($instance)
855: && $instance ne $field
856: && $instance ne 'bridgetask');
857:
858: if (!defined($part)) {
859: $part = $version;
860: }
861: my $resp_id = &get_part_id('0');
862: my $part_id = &get_part_id($part);
863:
864: if ($field eq 'version') {
865: # for tasks each version is an attempt at it thus
866: # version -> tries
867: $partdata->{$symb_id}{$part_id}{$transaction}{'tries'}=
868: $value;
869: # at new version time the record gets reset thus adding a
870: # virtual response awarddetail of 'new_version'
871: $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific'}='status';
872: $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific_value'}='new_version';
873:
874: } elsif ($field eq 'award' || $field eq 'awarded'
875: || $field eq 'solved') {
876: $partdata->{$symb_id}{$part_id}{$transaction}{$field}=
877: $value;
878: } elsif ($field eq 'portfiles') {
879: # tasks only accepts portfolio submissions
880: $value = $dbh->quote($value);
881: $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'submission'}=$value;
882: } elsif ($field eq 'status') {
883: $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific'}=$field;
884: $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific_value'}=$value;
885: } elsif ($field eq 'regrader') {
886: $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific_2'}=$field;
887: $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific_value_2'}=$value;
888: }
889: } elsif ($parameter =~ /^resource\.(.*)\.(tries|
1.90 matthew 890: award|
891: awarded|
892: previous|
893: solved|
894: awarddetail|
895: submission|
896: submissiongrading|
897: molecule)\s*$/x){
1.89 matthew 898: # we do not have enough information to store an
899: # entire row, so we save it up until later.
900: my ($part_and_resp_id,$field) = ($1,$2);
901: my ($part,$part_id,$resp,$resp_id);
902: if ($part_and_resp_id =~ /\./) {
903: ($part,$resp) = split(/\./,$part_and_resp_id);
904: $part_id = &get_part_id($part);
905: $resp_id = &get_part_id($resp);
906: } else {
907: $part_id = &get_part_id($part_and_resp_id);
908: }
1.90 matthew 909: # Deal with part specific data
1.89 matthew 910: if ($field =~ /^(tries|award|awarded|previous)$/) {
911: $partdata->{$symb_id}->{$part_id}->{$transaction}->{$field}=$value;
912: }
1.90 matthew 913: # deal with response specific data
1.89 matthew 914: if (defined($resp_id) &&
1.100 matthew 915: $field =~ /^(awarddetail|
1.90 matthew 916: submission|
917: submissiongrading|
918: molecule)$/x) {
1.89 matthew 919: if ($field eq 'submission') {
920: # We have to be careful with user supplied input.
921: # most of the time we are okay because it is escaped.
922: # However, there is one wrinkle: submissions which end in
923: # and odd number of '\' cause insert errors to occur.
924: # Best trap this somehow...
1.116 matthew 925: $value = $dbh->quote($value);
1.89 matthew 926: }
1.90 matthew 927: if ($field eq 'submissiongrading' ||
928: $field eq 'molecule') {
929: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific'}=$field;
930: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific_value'}=$value;
931: } else {
932: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{$field}=$value;
933: }
1.89 matthew 934: }
935: }
936: }
937: ##
938: ## Store the part data
1.98 matthew 939: my $store_command = 'INSERT IGNORE INTO '.$fulldump_part_table.
1.89 matthew 940: ' VALUES '."\n";
941: my $store_rows = 0;
942: while (my ($symb_id,$hash1) = each (%$partdata)) {
943: while (my ($part_id,$hash2) = each (%$hash1)) {
944: while (my ($transaction,$data) = each (%$hash2)) {
945: $store_command .= "('".join("','",$symb_id,$part_id,
946: $student_id,
947: $transaction,
1.101 matthew 948: $data->{'tries'},
1.89 matthew 949: $data->{'award'},
950: $data->{'awarded'},
951: $data->{'previous'})."'),";
952: $store_rows++;
953: }
954: }
955: }
956: if ($store_rows) {
957: chop($store_command);
958: $dbh->do($store_command);
959: if ($dbh->err) {
1.182 albertel 960: $returnstatus = 'error saving part data';
1.89 matthew 961: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
962: &Apache::lonnet::logthis("While attempting\n".$store_command);
963: }
964: }
965: ##
966: ## Store the response data
1.98 matthew 967: $store_command = 'INSERT IGNORE INTO '.$fulldump_response_table.
1.89 matthew 968: ' VALUES '."\n";
969: $store_rows = 0;
970: while (my ($symb_id,$hash1) = each (%$respdata)) {
971: while (my ($part_id,$hash2) = each (%$hash1)) {
972: while (my ($resp_id,$hash3) = each (%$hash2)) {
973: while (my ($transaction,$data) = each (%$hash3)) {
1.112 matthew 974: my $submission = $data->{'submission'};
975: # We have to be careful with user supplied input.
976: # most of the time we are okay because it is escaped.
977: # However, there is one wrinkle: submissions which end in
978: # and odd number of '\' cause insert errors to occur.
979: # Best trap this somehow...
980: $submission = $dbh->quote($submission);
981: $store_command .= "('".
982: join("','",$symb_id,$part_id,
983: $resp_id,$student_id,
984: $transaction,
985: $data->{'awarddetail'},
986: $data->{'response_specific'},
1.162 albertel 987: $data->{'response_specific_value'},
1.159 albertel 988: $data->{'response_specific_2'},
989: $data->{'response_specific_value_2'}).
1.112 matthew 990: "',".$submission."),";
1.89 matthew 991: $store_rows++;
992: }
993: }
994: }
995: }
996: if ($store_rows) {
997: chop($store_command);
998: $dbh->do($store_command);
999: if ($dbh->err) {
1.182 albertel 1000: $returnstatus = 'error saving response data';
1.89 matthew 1001: &Apache::lonnet::logthis('insert error '.$dbh->errstr());
1002: &Apache::lonnet::logthis("While attempting\n".$store_command);
1003: }
1004: }
1005: ##
1006: ## Update the students "current" data in the performance
1007: ## and parameters tables.
1008: my ($status,undef) = &store_student_data
1009: ($sname,$sdom,$courseid,
1010: &Apache::lonnet::convert_dump_to_currentdump(\%studentdata));
1011: if ($returnstatus eq 'okay' && $status ne 'okay') {
1.182 albertel 1012: $returnstatus = 'error saving current data:'.$status;
1.89 matthew 1013: } elsif ($status ne 'okay') {
1.182 albertel 1014: $returnstatus .= ' error saving current data:'.$status;
1.89 matthew 1015: }
1016: ##
1017: ## Update the students time......
1018: if ($returnstatus eq 'okay') {
1.113 matthew 1019: &store_updatetime($student_id,$time_of_retrieval,$time_of_retrieval);
1020: if ($dbh->err) {
1021: if ($returnstatus eq 'okay') {
1022: $returnstatus = 'error updating student time';
1023: } else {
1024: $returnstatus = 'error updating student time';
1025: }
1026: }
1.89 matthew 1027: }
1028: return $returnstatus;
1029: }
1030:
1.57 matthew 1031:
1032: sub update_student_data {
1033: my ($sname,$sdom,$courseid) = @_;
1034: #
1.60 matthew 1035: # Set up database names
1036: &setup_table_names($courseid);
1037: #
1.57 matthew 1038: my $student_id = &get_student_id($sname,$sdom);
1039: my $student = $sname.':'.$sdom;
1040: #
1041: my $returnstatus = 'okay';
1042: #
1043: # Download students data
1044: my $time_of_retrieval = time;
1.177 albertel 1045: my %student_data = &Apache::lonnet::currentdump($courseid,$sdom,$sname);
1046: if (&Apache::lonnet::error(%student_data)) {
1.57 matthew 1047: &Apache::lonnet::logthis('error getting data for '.
1048: $sname.':'.$sdom.' in course '.$courseid.
1.177 albertel 1049: ':'.(%student_data)[0]);
1050: $returnstatus =(%student_data)[0] ;
1.79 matthew 1051: return ($returnstatus,undef);
1.57 matthew 1052: }
1.177 albertel 1053: if (scalar(keys(%student_data)) < 1) {
1.57 matthew 1054: return ('no data',undef);
1055: }
1.89 matthew 1056: my @Results = &store_student_data($sname,$sdom,$courseid,\%student_data);
1057: #
1058: # Set the students update time
1.96 matthew 1059: if ($Results[0] eq 'okay') {
1.148 matthew 1060: &store_updatetime($student_id,$time_of_retrieval);
1.95 matthew 1061: }
1.89 matthew 1062: #
1063: return @Results;
1064: }
1065:
1.113 matthew 1066: sub store_updatetime {
1067: my ($student_id,$updatetime,$fullupdatetime)=@_;
1068: my $values = '';
1069: if (defined($updatetime)) {
1070: $values = 'updatetime='.$updatetime.' ';
1071: }
1072: if (defined($fullupdatetime)) {
1073: if ($values ne '') {
1074: $values .= ',';
1075: }
1076: $values .= 'fullupdatetime='.$fullupdatetime.' ';
1077: }
1078: return if ($values eq '');
1079: my $dbh = &Apache::lonmysql::get_dbh();
1080: my $request = 'UPDATE '.$student_table.' SET '.$values.
1081: ' WHERE student_id='.$student_id.' LIMIT 1';
1082: $dbh->do($request);
1083: }
1084:
1.89 matthew 1085: sub store_student_data {
1086: my ($sname,$sdom,$courseid,$student_data) = @_;
1087: #
1088: my $student_id = &get_student_id($sname,$sdom);
1089: my $student = $sname.':'.$sdom;
1090: #
1091: my $returnstatus = 'okay';
1.57 matthew 1092: #
1093: # Remove all of the students data from the table
1.60 matthew 1094: my $dbh = &Apache::lonmysql::get_dbh();
1095: $dbh->do('DELETE FROM '.$performance_table.' WHERE student_id='.
1096: $student_id);
1097: $dbh->do('DELETE FROM '.$parameters_table.' WHERE student_id='.
1098: $student_id);
1.57 matthew 1099: #
1100: # Store away the data
1101: #
1102: my $starttime = Time::HiRes::time;
1103: my $elapsed = 0;
1104: my $rows_stored;
1.98 matthew 1105: my $store_parameters_command = 'INSERT IGNORE INTO '.$parameters_table.
1.60 matthew 1106: ' VALUES '."\n";
1.61 matthew 1107: my $num_parameters = 0;
1.98 matthew 1108: my $store_performance_command = 'INSERT IGNORE INTO '.$performance_table.
1.60 matthew 1109: ' VALUES '."\n";
1.79 matthew 1110: return ('error',undef) if (! defined($dbh));
1.89 matthew 1111: while (my ($current_symb,$param_hash) = each(%{$student_data})) {
1.57 matthew 1112: #
1113: # make sure the symb is set up properly
1114: my $symb_id = &get_symb_id($current_symb);
1115: #
1.147 matthew 1116: # Parameters
1.63 matthew 1117: while (my ($parameter,$value) = each(%$param_hash)) {
1118: if ($parameter !~ /(timestamp|resource\.(.*)\.(solved|tries|awarded|award|awarddetail|previous))/) {
1.147 matthew 1119: my $sql_parameter = "('".join("','",
1120: $symb_id,$student_id,
1121: $parameter)."',".
1122: $dbh->quote($value)."),\n";
1.61 matthew 1123: $num_parameters ++;
1.147 matthew 1124: if ($sql_parameter !~ /''/) {
1125: $store_parameters_command .= $sql_parameter;
1.149 albertel 1126: #$rows_stored++;
1.57 matthew 1127: }
1128: }
1.147 matthew 1129: }
1130: # Performance
1131: my %stored;
1132: while (my ($parameter,$value) = each(%$param_hash)) {
1133: next if ($parameter !~ /^resource\.(.*)\.(solved|awarded)$/);
1.161 albertel 1134: my $part = $1;
1135: my $which = $2;
1.151 albertel 1136: next if ($part =~ /\./);
1.147 matthew 1137: next if (exists($stored{$part}));
1138: $stored{$part}++;
1.57 matthew 1139: #
1140: my $part_id = &get_part_id($part);
1141: next if (!defined($part_id));
1.161 albertel 1142:
1143: my ($solved,$awarded);
1144: if ($which eq 'solved') {
1145: $solved = $value;
1146: $awarded = $param_hash->{'resource.'.$part.'.awarded'};
1147: } else {
1148: $solved = $param_hash->{'resource.'.$part.'.solved'};
1149: $awarded = $value;
1150: }
1.57 matthew 1151: my $award = $param_hash->{'resource.'.$part.'.award'};
1152: my $awarddetail = $param_hash->{'resource.'.$part.'.awarddetail'};
1153: my $timestamp = $param_hash->{'timestamp'};
1.164 albertel 1154: my $tries = $param_hash->{'resource.'.$part.'.tries'};
1155: if (&symb_is_for_task($current_symb)) {
1156: $tries = $param_hash->{'resource.'.$part.'.version'};
1157: }
1.60 matthew 1158: #
1.74 matthew 1159: $solved = '' if (! defined($solved));
1.57 matthew 1160: $tries = '' if (! defined($tries));
1161: $awarded = '' if (! defined($awarded));
1162: $award = '' if (! defined($award));
1163: $awarddetail = '' if (! defined($awarddetail));
1.147 matthew 1164: my $sql_performance =
1165: "('".join("','",$symb_id,$student_id,$part_id,$part,
1166: $solved,$tries,$awarded,$award,
1167: $awarddetail,$timestamp)."'),\n";
1168: $store_performance_command .= $sql_performance;
1.57 matthew 1169: $rows_stored++;
1170: }
1171: }
1.149 albertel 1172: if (! $rows_stored) { return ($returnstatus, undef); }
1.147 matthew 1173: $store_parameters_command =~ s|,\n$||;
1174: $store_performance_command =~ s|,\n$||;
1.57 matthew 1175: my $start = Time::HiRes::time;
1.94 matthew 1176: $dbh->do($store_performance_command);
1177: if ($dbh->err()) {
1.147 matthew 1178: &Apache::lonnet::logthis('performance bigass insert error:'.
1179: $dbh->errstr());
1180: &Apache::lonnet::logthis('command = '.$/.$store_performance_command);
1.94 matthew 1181: $returnstatus = 'error: unable to insert performance into database';
1182: return ($returnstatus,$student_data);
1183: }
1.61 matthew 1184: $dbh->do($store_parameters_command) if ($num_parameters>0);
1.57 matthew 1185: if ($dbh->err()) {
1.147 matthew 1186: &Apache::lonnet::logthis('parameters bigass insert error:'.
1187: $dbh->errstr());
1188: &Apache::lonnet::logthis('command = '.$/.$store_parameters_command);
1.87 matthew 1189: &Apache::lonnet::logthis('rows_stored = '.$rows_stored);
1190: &Apache::lonnet::logthis('student_id = '.$student_id);
1.57 matthew 1191: $returnstatus = 'error: unable to insert parameters into database';
1.89 matthew 1192: return ($returnstatus,$student_data);
1.57 matthew 1193: }
1194: $elapsed += Time::HiRes::time - $start;
1.89 matthew 1195: return ($returnstatus,$student_data);
1.57 matthew 1196: }
1197:
1198:
1.89 matthew 1199: sub ensure_tables_are_set_up {
1200: my ($courseid) = @_;
1.146 albertel 1201: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.61 matthew 1202: #
1203: # Clean out package variables
1.57 matthew 1204: &setup_table_names($courseid);
1205: #
1206: # if the tables do not exist, make them
1207: my @CurrentTable = &Apache::lonmysql::tables_in_db();
1.167 raeburn 1208: my ($found_symb,$found_student,$found_groups,$found_groupnames,$found_part,
1.89 matthew 1209: $found_performance,$found_parameters,$found_fulldump_part,
1.127 matthew 1210: $found_fulldump_response,$found_fulldump_timestamp,
1211: $found_weight);
1.57 matthew 1212: foreach (@CurrentTable) {
1213: $found_symb = 1 if ($_ eq $symb_table);
1214: $found_student = 1 if ($_ eq $student_table);
1.167 raeburn 1215: $found_groups = 1 if ($_ eq $students_groups_table);
1216: $found_groupnames = 1 if ($_ eq $groupnames_table);
1.57 matthew 1217: $found_part = 1 if ($_ eq $part_table);
1218: $found_performance = 1 if ($_ eq $performance_table);
1219: $found_parameters = 1 if ($_ eq $parameters_table);
1.89 matthew 1220: $found_fulldump_part = 1 if ($_ eq $fulldump_part_table);
1221: $found_fulldump_response = 1 if ($_ eq $fulldump_response_table);
1222: $found_fulldump_timestamp = 1 if ($_ eq $fulldump_timestamp_table);
1.127 matthew 1223: $found_weight = 1 if ($_ eq $weight_table);
1.57 matthew 1224: }
1.127 matthew 1225: if (!$found_symb ||
1226: !$found_student || !$found_part ||
1227: !$found_performance || !$found_parameters ||
1.89 matthew 1228: !$found_fulldump_part || !$found_fulldump_response ||
1.127 matthew 1229: !$found_fulldump_timestamp || !$found_weight ) {
1.134 matthew 1230: if (&init_dbs($courseid,1)) {
1.89 matthew 1231: return 'error';
1.57 matthew 1232: }
1233: }
1.89 matthew 1234: }
1235:
1236: sub ensure_current_data {
1237: my ($sname,$sdom,$courseid) = @_;
1238: my $status = 'okay'; # return value
1239: #
1.146 albertel 1240: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.89 matthew 1241: &ensure_tables_are_set_up($courseid);
1.57 matthew 1242: #
1243: # Get the update time for the user
1244: my $updatetime = 0;
1.187 raeburn 1245: my $getuserdir = 1;
1.60 matthew 1246: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1.187 raeburn 1247: ($sdom,$sname,$courseid.'.db',$getuserdir);
1.57 matthew 1248: #
1.177 albertel 1249: if ($modifiedtime == -1) {
1250: return ('no data',undef);
1251: }
1252:
1.87 matthew 1253: my $student_id = &get_student_id($sname,$sdom);
1.196 raeburn 1254: &get_students_groupids($student_id);
1.113 matthew 1255: my @Result = &Apache::lonmysql::get_rows($student_table,
1.87 matthew 1256: "student_id ='$student_id'");
1.57 matthew 1257: my $data = undef;
1258: if (@Result) {
1.180 albertel 1259: $updatetime = $Result[0]->[6]; # Ack! This is dumb!
1.57 matthew 1260: }
1261: if ($modifiedtime > $updatetime) {
1262: ($status,$data) = &update_student_data($sname,$sdom,$courseid);
1263: }
1264: return ($status,$data);
1265: }
1266:
1.89 matthew 1267:
1268: sub ensure_current_full_data {
1269: my ($sname,$sdom,$courseid) = @_;
1270: my $status = 'okay'; # return value
1271: #
1.146 albertel 1272: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.89 matthew 1273: &ensure_tables_are_set_up($courseid);
1274: #
1275: # Get the update time for the user
1.187 raeburn 1276: my $getuserdir = 1;
1.89 matthew 1277: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
1.187 raeburn 1278: ($sdom,$sname,$courseid.'.db',$getuserdir);
1.89 matthew 1279: #
1280: my $student_id = &get_student_id($sname,$sdom);
1.196 raeburn 1281: &get_students_groupids($student_id);
1.113 matthew 1282: my @Result = &Apache::lonmysql::get_rows($student_table,
1.89 matthew 1283: "student_id ='$student_id'");
1284: my $updatetime;
1285: if (@Result && ref($Result[0]) eq 'ARRAY') {
1.180 albertel 1286: $updatetime = $Result[0]->[7];
1.89 matthew 1287: }
1288: if (! defined($updatetime) || $modifiedtime > $updatetime) {
1289: $status = &update_full_student_data($sname,$sdom,$courseid);
1290: }
1291: return $status;
1292: }
1293:
1.197 ! raeburn 1294: sub ensure_current_groups {
! 1295: my ($courseid) = @_;
! 1296: my ($cdom,$cnum);
! 1297: if (defined($courseid)) {
! 1298: my %coursehash = &Apache::lonnet::coursedescription($courseid);
! 1299: $cdom = $coursehash{'domain'};
! 1300: $cnum = $coursehash{'num'};
! 1301: } elsif ($env{'request.course.id'}) {
! 1302: $courseid = $env{'request.course.id'};
! 1303: $cdom = $env{'course.'.$courseid.'.domain'};
! 1304: $cnum = $env{'course.'.$courseid.'.num'};
! 1305: }
! 1306: if ($cdom eq '' || $cnum eq '') {
! 1307: return 'error: invalid course';
! 1308: }
! 1309: &ensure_tables_are_set_up($courseid);
! 1310: # Get the update time for the groupnames table
! 1311: my $getuserdir = 1;
! 1312: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
! 1313: ($cdom,$cnum,'coursegroups.db',$getuserdir);
! 1314: my %tableinfo = &Apache::lonmysql::table_information($groupnames_table);
! 1315: my $updatetime;
! 1316: if ($tableinfo{'Update_time'}) {
! 1317: $updatetime = $tableinfo{'Update_time'};
! 1318: }
! 1319: print STDERR "1. updatetime is ||$updatetime|| and modifidtime is ||$modifiedtime||\n";
! 1320: if (! defined($updatetime) || $modifiedtime > $updatetime) {
! 1321: my (%groups_in_sql,%removegroups,$addgroup);
! 1322: my %curr_groups = &Apache::longroup::coursegroups($cdom,$cnum);
! 1323: my @Result = &Apache::lonmysql::get_rows($groupnames_table);
! 1324: foreach my $row (@Result) {
! 1325: my ($id,$name) = @{$row};
! 1326: unless (exists($curr_groups{$name})) {
! 1327: $groups_in_sql{$name}=$id;
! 1328: } elsif ($id) {
! 1329: $removegroups{$id} = $name;
! 1330: }
! 1331: }
! 1332: foreach my $group (keys(%curr_groups)) {
! 1333: unless (exists($groups_in_sql{$group})) {
! 1334: $addgroup = 1;
! 1335: last;
! 1336: }
! 1337: }
! 1338: if (keys(%removegroups)) {
! 1339: my $dbh = &Apache::lonmysql::get_dbh();
! 1340: foreach my $group_id (keys(%removegroups)) {
! 1341: my $command = 'DELETE FROM '.$groupnames_table.' WHERE group_id='.
! 1342: $group_id;
! 1343: $dbh->do($command);
! 1344: if ($dbh->err()) {
! 1345: &Apache::lonnet::logthis("error ".$dbh->errstr().
! 1346: " occurred executing \n".
! 1347: "SQL command: $command");
! 1348: }
! 1349: }
! 1350: }
! 1351: if ($addgroup) {
! 1352: &populate_groupnames_table($courseid);
! 1353: }
! 1354: }
! 1355: return;
! 1356: }
! 1357:
! 1358: sub ensure_current_students_groups {
! 1359: my ($courseid) = @_;
! 1360: my ($cdom,$cnum);
! 1361: if (defined($courseid)) {
! 1362: my %coursehash = &Apache::lonnet::coursedescription($courseid);
! 1363: $cdom = $coursehash{'domain'};
! 1364: $cnum = $coursehash{'num'};
! 1365: } elsif ($env{'request.course.id'}) {
! 1366: $courseid = $env{'request.course.id'};
! 1367: $cdom = $env{'course.'.$courseid.'.domain'};
! 1368: $cnum = $env{'course.'.$courseid.'.num'};
! 1369: }
! 1370: &ensure_tables_are_set_up($courseid);
! 1371: # Get the update time for the groupnames table
! 1372: my $getuserdir = 1;
! 1373: my $modifiedtime = &Apache::lonnet::GetFileTimestamp
! 1374: ($cdom,$cnum,'groupmembership.db',$getuserdir);
! 1375: my %tableinfo = &Apache::lonmysql::table_information($students_groups_table);
! 1376: my $updatetime;
! 1377: if ($tableinfo{'Update_time'}) {
! 1378: $updatetime = $tableinfo{'Update_time'};
! 1379: }
! 1380: print STDERR "2. updatetime is ||$updatetime|| and modifidtime is ||$modifiedtime||\n";
! 1381: if ((!defined($updatetime)) || ($modifiedtime > $updatetime)) {
! 1382: if (&Apache::lonmysql::drop_table($students_groups_table)) {
! 1383: if (&init_dbs($courseid)) {
! 1384: return "error creating $students_groups_table\n";
! 1385: } else {
! 1386: &populate_students_groups_table($courseid);
! 1387: }
! 1388: }
! 1389: }
! 1390: return;
! 1391: }
1.57 matthew 1392:
1393: sub get_student_data_from_performance_cache {
1394: my ($sname,$sdom,$symb,$courseid)=@_;
1395: my $student = $sname.':'.$sdom if (defined($sname) && defined($sdom));
1.61 matthew 1396: &setup_table_names($courseid);
1.57 matthew 1397: #
1398: # Return hash
1399: my $studentdata;
1400: #
1401: my $dbh = &Apache::lonmysql::get_dbh();
1402: my $request = "SELECT ".
1.73 matthew 1403: "d.symb,a.part,a.solved,a.tries,a.awarded,a.award,a.awarddetail,".
1.63 matthew 1404: "a.timestamp ";
1.57 matthew 1405: if (defined($student)) {
1406: $request .= "FROM $student_table AS b ".
1407: "LEFT JOIN $performance_table AS a ON b.student_id=a.student_id ".
1.73 matthew 1408: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1.57 matthew 1409: "LEFT JOIN $symb_table AS d ON d.symb_id = a.symb_id ".
1410: "WHERE student='$student'";
1411: if (defined($symb) && $symb ne '') {
1.67 matthew 1412: $request .= " AND d.symb=".$dbh->quote($symb);
1.57 matthew 1413: }
1414: } elsif (defined($symb) && $symb ne '') {
1415: $request .= "FROM $symb_table as d ".
1416: "LEFT JOIN $performance_table AS a ON d.symb_id=a.symb_id ".
1.73 matthew 1417: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ".
1.57 matthew 1418: "LEFT JOIN $student_table AS b ON b.student_id = a.student_id ".
1419: "WHERE symb='".$dbh->quote($symb)."'";
1420: }
1421: my $starttime = Time::HiRes::time;
1422: my $rows_retrieved = 0;
1423: my $sth = $dbh->prepare($request);
1424: $sth->execute();
1425: if ($sth->err()) {
1426: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1427: &Apache::lonnet::logthis("\n".$request."\n");
1428: &Apache::lonnet::logthis("error is:".$sth->errstr());
1429: return undef;
1430: }
1431: foreach my $row (@{$sth->fetchall_arrayref}) {
1432: $rows_retrieved++;
1.63 matthew 1433: my ($symb,$part,$solved,$tries,$awarded,$award,$awarddetail,$time) =
1.57 matthew 1434: (@$row);
1435: my $base = 'resource.'.$part;
1436: $studentdata->{$symb}->{$base.'.solved'} = $solved;
1437: $studentdata->{$symb}->{$base.'.tries'} = $tries;
1438: $studentdata->{$symb}->{$base.'.awarded'} = $awarded;
1439: $studentdata->{$symb}->{$base.'.award'} = $award;
1440: $studentdata->{$symb}->{$base.'.awarddetail'} = $awarddetail;
1441: $studentdata->{$symb}->{'timestamp'} = $time if (defined($time) && $time ne '');
1.67 matthew 1442: }
1.97 matthew 1443: ## Get misc parameters
1444: $request = 'SELECT c.symb,a.parameter,a.value '.
1445: "FROM $student_table AS b ".
1446: "LEFT JOIN $parameters_table AS a ON b.student_id=a.student_id ".
1447: "LEFT JOIN $symb_table AS c ON c.symb_id = a.symb_id ".
1448: "WHERE student='$student'";
1449: if (defined($symb) && $symb ne '') {
1450: $request .= " AND c.symb=".$dbh->quote($symb);
1451: }
1452: $sth = $dbh->prepare($request);
1453: $sth->execute();
1454: if ($sth->err()) {
1455: &Apache::lonnet::logthis("Unable to execute MySQL request:");
1456: &Apache::lonnet::logthis("\n".$request."\n");
1457: &Apache::lonnet::logthis("error is:".$sth->errstr());
1458: if (defined($symb) && $symb ne '') {
1459: $studentdata = $studentdata->{$symb};
1460: }
1461: return $studentdata;
1462: }
1463: #
1464: foreach my $row (@{$sth->fetchall_arrayref}) {
1465: $rows_retrieved++;
1466: my ($symb,$parameter,$value) = (@$row);
1467: $studentdata->{$symb}->{$parameter} = $value;
1468: }
1469: #
1.67 matthew 1470: if (defined($symb) && $symb ne '') {
1471: $studentdata = $studentdata->{$symb};
1.57 matthew 1472: }
1473: return $studentdata;
1474: }
1475:
1.46 matthew 1476:
1477: sub get_current_state {
1.47 matthew 1478: my ($sname,$sdom,$symb,$courseid,$forcedownload)=@_;
1479: #
1.146 albertel 1480: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.47 matthew 1481: #
1.61 matthew 1482: return () if (! defined($sname) || ! defined($sdom));
1483: #
1.57 matthew 1484: my ($status,$data) = &ensure_current_data($sname,$sdom,$courseid);
1.77 matthew 1485: # &Apache::lonnet::logthis
1486: # ('sname = '.$sname.
1487: # ' domain = '.$sdom.
1488: # ' status = '.$status.
1489: # ' data is '.(defined($data)?'defined':'undefined'));
1.73 matthew 1490: # while (my ($symb,$hash) = each(%$data)) {
1491: # &Apache::lonnet::logthis($symb."\n----------------------------------");
1492: # while (my ($key,$value) = each (%$hash)) {
1493: # &Apache::lonnet::logthis(" ".$key." = ".$value);
1494: # }
1495: # }
1.47 matthew 1496: #
1.79 matthew 1497: if (defined($data) && defined($symb) && ref($data->{$symb})) {
1498: return %{$data->{$symb}};
1499: } elsif (defined($data) && ! defined($symb) && ref($data)) {
1500: return %$data;
1501: }
1502: if ($status eq 'no data') {
1.57 matthew 1503: return ();
1504: } else {
1505: if ($status ne 'okay' && $status ne '') {
1506: &Apache::lonnet::logthis('status = '.$status);
1.177 albertel 1507: return ('error: '.$status,undef);
1.47 matthew 1508: }
1.57 matthew 1509: my $returnhash = &get_student_data_from_performance_cache($sname,$sdom,
1510: $symb,$courseid);
1511: return %$returnhash if (defined($returnhash));
1.46 matthew 1512: }
1.57 matthew 1513: return ();
1.61 matthew 1514: }
1515:
1516:
1.190 jms 1517: sub get_problem_statistics {
1518: my ($Sections,$Groups,$status,$symb,$part,$courseid,$starttime,$endtime) = @_;
1519: return if (! defined($symb) || ! defined($part));
1520: $courseid = $env{'request.course.id'} if (! defined($courseid));
1521: #
1522: &setup_table_names($courseid);
1523: my $symb_id = &get_symb_id($symb);
1524: my $part_id = &get_part_id($part);
1525: my $stats_table = &temp_table_name($courseid,'problem_stats');
1526: #
1527: my $dbh = &Apache::lonmysql::get_dbh();
1528: return undef if (! defined($dbh));
1529: #
1530: # Clean out the table
1531: $dbh->do('DROP TABLE '.$stats_table); # May return an error
1532: my $request =
1533: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
1534: 'SELECT a.student_id,a.solved,a.award,a.awarded,a.tries '.
1535: 'FROM '.$performance_table.' AS a ';
1536: #
1537: # See if we need to include some requirements on the students
1538: if ((defined($Sections) && lc($Sections->[0]) ne 'all') ||
1539: (defined($status) && lc($status) ne 'any')) {
1540: $request .= 'NATURAL LEFT JOIN '.$student_table.' AS b ';
1541: }
1542: my ($groups_join,$group_limits) = &limit_by_group($Groups,'b','c','d');
1543: if (defined($groups_join)) {
1544: $request .= $groups_join;
1545: }
1546: $request .= ' WHERE a.symb_id='.$symb_id.' AND a.part_id='.$part_id;
1547: #
1548: # Limit the students included to those specified
1549: my ($section_limits,$enrollment_limits)=
1550: &limit_by_section_and_status($Sections,$status,'b');
1551: #
1552: # Limit by starttime and endtime
1553: my $time_requirements = undef;
1554: if (defined($starttime)) {
1555: $time_requirements .= 'a.timestamp>='.$starttime;
1556: if (defined($endtime)) {
1557: $time_requirements .= ' AND a.timestamp<='.$endtime;
1558: }
1559: } elsif (defined($endtime)) {
1560: $time_requirements .= 'a.timestamp<='.$endtime;
1.122 matthew 1561: }
1562: if (defined($time_requirements)) {
1563: $request .= ' AND '.$time_requirements;
1.115 matthew 1564: }
1.178 albertel 1565: if (defined($section_limits)) {
1566: $request .= ' AND '.$section_limits;
1567: }
1568: if (defined($enrollment_limits)) {
1569: $request .= ' AND '.$enrollment_limits;
1570: }
1.167 raeburn 1571: # Limit by group, as required
1572: if (defined($group_limits)) {
1573: $request .= ' AND '.$group_limits;
1574: }
1.123 matthew 1575: #
1576: # Finally, execute the request to create the temporary table
1.61 matthew 1577: $dbh->do($request);
1.123 matthew 1578: #
1579: # Collect the first suite of statistics
1.128 matthew 1580: $request = 'SELECT COUNT(*),SUM(tries),'.
1581: 'AVG(tries),STD(tries) '.
1.109 matthew 1582: 'FROM '.$stats_table;
1.128 matthew 1583: my ($num,$tries,$mean,$STD) = &execute_SQL_request
1.109 matthew 1584: ($dbh,$request);
1.128 matthew 1585: #
1586: $request = 'SELECT MAX(tries),MIN(tries) FROM '.$stats_table.
1587: ' WHERE awarded>0';
1588: if (defined($time_requirements)) {
1589: $request .= ' AND '.$time_requirements;
1590: }
1591: my ($max,$min) = &execute_SQL_request($dbh,$request);
1592: #
1.109 matthew 1593: $request = 'SELECT SUM(awarded) FROM '.$stats_table;
1.128 matthew 1594: if (defined($time_requirements)) {
1595: $request .= ' AND '.$time_requirements;
1596: }
1.109 matthew 1597: my ($Solved) = &execute_SQL_request($dbh,$request);
1.128 matthew 1598: #
1.109 matthew 1599: $request = 'SELECT SUM(awarded) FROM '.$stats_table.
1600: " WHERE solved='correct_by_override'";
1.128 matthew 1601: if (defined($time_requirements)) {
1602: $request .= ' AND '.$time_requirements;
1603: }
1.109 matthew 1604: my ($solved) = &execute_SQL_request($dbh,$request);
1605: #
1.133 matthew 1606: $Solved -= $solved;
1607: #
1.61 matthew 1608: $num = 0 if (! defined($num));
1609: $tries = 0 if (! defined($tries));
1.128 matthew 1610: $max = 0 if (! defined($max));
1611: $min = 0 if (! defined($min));
1.61 matthew 1612: $STD = 0 if (! defined($STD));
1.133 matthew 1613: $Solved = 0 if (! defined($Solved) || $Solved < 0);
1.61 matthew 1614: $solved = 0 if (! defined($solved));
1615: #
1.123 matthew 1616: # Compute the more complicated statistics
1.61 matthew 1617: my $DegOfDiff = 'nan';
1.66 matthew 1618: $DegOfDiff = 1-($Solved)/$tries if ($tries>0);
1.123 matthew 1619: #
1.61 matthew 1620: my $SKEW = 'nan';
1.66 matthew 1621: my $wrongpercent = 0;
1.128 matthew 1622: my $numwrong = 'nan';
1.61 matthew 1623: if ($num > 0) {
1624: ($SKEW) = &execute_SQL_request($dbh,'SELECT SQRT(SUM('.
1625: 'POWER(tries - '.$STD.',3)'.
1626: '))/'.$num.' FROM '.$stats_table);
1.128 matthew 1627: $numwrong = $num-$Solved;
1628: $wrongpercent=int(10*100*$numwrong/$num)/10;
1.61 matthew 1629: }
1630: #
1.123 matthew 1631: # Drop the temporary table
1632: $dbh->do('DROP TABLE '.$stats_table); # May return an error
1.81 matthew 1633: #
1634: # Return result
1.66 matthew 1635: return { num_students => $num,
1636: tries => $tries,
1.128 matthew 1637: max_tries => $max,
1638: min_tries => $min,
1.66 matthew 1639: mean_tries => $mean,
1640: std_tries => $STD,
1641: skew_tries => $SKEW,
1642: num_solved => $Solved,
1643: num_override => $solved,
1.128 matthew 1644: num_wrong => $numwrong,
1.66 matthew 1645: per_wrong => $wrongpercent,
1.81 matthew 1646: deg_of_diff => $DegOfDiff };
1.61 matthew 1647: }
1648:
1.127 matthew 1649: ##
1650: ## This is a helper for get_statistics
1.61 matthew 1651: sub execute_SQL_request {
1652: my ($dbh,$request)=@_;
1653: # &Apache::lonnet::logthis($request);
1654: my $sth = $dbh->prepare($request);
1.153 albertel 1655: if (!$sth) {
1656: die($dbh->errstr . " SQL: $request");
1657: }
1.61 matthew 1658: $sth->execute();
1659: my $row = $sth->fetchrow_arrayref();
1660: if (ref($row) eq 'ARRAY' && scalar(@$row)>0) {
1661: return @$row;
1662: }
1663: return ();
1664: }
1.123 matthew 1665:
1.127 matthew 1666:
1667: sub populate_weight_table {
1668: my ($courseid) = @_;
1669: if (! defined($courseid)) {
1.146 albertel 1670: $courseid = $env{'request.course.id'};
1.127 matthew 1671: }
1672: #
1673: &setup_table_names($courseid);
1.144 matthew 1674: my $navmap = Apache::lonnavmaps::navmap->new();
1675: if (!defined($navmap)) {
1676: &Apache::lonnet::logthis('loncoursedata::populate_weight_table:'.$/.
1677: ' unable to get navmaps resource'.$/.
1678: ' '.join(' ',(caller)));
1679: return;
1680: }
1681: my @sequences = $navmap->retrieveResources(undef,
1682: sub { shift->is_map(); },1,0,1);
1683: my @resources;
1684: foreach my $seq (@sequences) {
1685: push(@resources,$navmap->retrieveResources($seq,
1686: sub {shift->is_problem();},
1687: 0,0,0));
1688: }
1689: if (! scalar(@resources)) {
1690: &Apache::lonnet::logthis('loncoursedata::populate_weight_table:'.$/.
1691: ' no resources returned for '.$courseid);
1.127 matthew 1692: return;
1693: }
1694: # Since we use lonnet::EXT to retrieve problem weights,
1695: # to ensure current data we must clear the caches out.
1696: &Apache::lonnet::clear_EXT_cache_status();
1697: my $dbh = &Apache::lonmysql::get_dbh();
1698: my $request = 'INSERT IGNORE INTO '.$weight_table.
1699: "(symb_id,part_id,weight) VALUES ";
1700: my $weight;
1.144 matthew 1701: foreach my $res (@resources) {
1702: my $symb_id = &get_symb_id($res->symb);
1703: foreach my $part (@{$res->parts}) {
1.127 matthew 1704: my $part_id = &get_part_id($part);
1705: $weight = &Apache::lonnet::EXT('resource.'.$part.'.weight',
1.144 matthew 1706: $res->symb,
1.127 matthew 1707: undef,undef,undef);
1708: if (!defined($weight) || ($weight eq '')) {
1709: $weight=1;
1710: }
1711: $request .= "('".$symb_id."','".$part_id."','".$weight."'),";
1712: }
1713: }
1714: $request =~ s/(,)$//;
1715: # &Apache::lonnet::logthis('request = '.$/.$request);
1716: $dbh->do($request);
1717: if ($dbh->err()) {
1718: &Apache::lonnet::logthis("error ".$dbh->errstr().
1.188 bisitz 1719: " occurred executing \n".
1.127 matthew 1720: $request);
1721: }
1722: return;
1723: }
1724:
1.129 matthew 1725: sub limit_by_start_end_time {
1726: my ($starttime,$endtime,$table) = @_;
1727: my $time_requirements = undef;
1728: if (defined($starttime)) {
1729: $time_requirements .= $table.".timestamp>='".$starttime."'";
1730: if (defined($endtime)) {
1731: $time_requirements .= " AND ".$table.".timestamp<='".$endtime."'";
1732: }
1733: } elsif (defined($endtime)) {
1734: $time_requirements .= $table.".timestamp<='".$endtime."'";
1735: }
1736: return $time_requirements;
1737: }
1738:
1.127 matthew 1739:
1740: sub limit_by_section_and_status {
1741: my ($Sections,$enrollment,$tablename) = @_;
1742: my $student_requirements = undef;
1743: if ( (defined($Sections) && $Sections->[0] ne 'all')) {
1744: $student_requirements = '('.
1745: join(' OR ', map { $tablename.".section='".$_."'" } @$Sections
1746: ).')';
1747: }
1748: my $enrollment_requirements=undef;
1749: if (defined($enrollment) && $enrollment ne 'Any') {
1.178 albertel 1750: my $now = time();
1751: if ( $enrollment eq 'Future' ) {
1752: $enrollment_requirements =
1753: "( $tablename.start > $now AND ".
1754: "( $tablename.end = 0 OR $tablename.end > $now))";
1755: } elsif ( $enrollment eq 'Active' ) {
1756: $enrollment_requirements =
1757: "(( $tablename.start = 0 OR $tablename.start < $now ) AND ".
1758: " ( $tablename.end = 0 OR $tablename.end > $now ))";
1759: } elsif ( $enrollment eq 'Expired' ) {
1760: $enrollment_requirements =
1761: "(( $tablename.start < $now ) AND ".
1762: " ( $tablename.end < $now ))";
1763: }
1.127 matthew 1764: }
1765: return ($student_requirements,$enrollment_requirements);
1766: }
1767:
1.190 jms 1768:
1.167 raeburn 1769:
1770: sub limit_by_group {
1771: my ($Groups,$stutable,$grptable,$stugrptab) = @_;
1772: my $groups_join = undef;
1773: my $group_limits = undef;
1774: if ( (defined($Groups) && $Groups->[0] ne 'all')) {
1775: $groups_join =
1776: ' LEFT JOIN '.$students_groups_table.
1777: ' AS '.$stugrptab.' ON '.
1778: $stugrptab.'.student_id = '.$stutable.'.student_id'.
1779: ' LEFT JOIN '.$groupnames_table.
1780: ' AS '.$grptable.' ON '.
1781: $stugrptab.'.group_id = '.$grptable.'.group_id ';
1782: $group_limits =
1783: ' ('.
1784: join(' OR ', map { "$grptable.groupname='".$_."'" } @$Groups
1785: ).')';
1786: }
1787: return ($groups_join,$group_limits);
1788: }
1.127 matthew 1789:
1790:
1791: sub RNK_student { return 0; };
1792: sub RNK_score { return 1; };
1793:
1794: sub rank_students_by_scores_on_resources {
1.167 raeburn 1795: my ($resources,$Sections,$Groups,$enrollment,$courseid,$starttime,$endtime,
1796: $has_award_for) = @_;
1.127 matthew 1797: return if (! defined($resources) || ! ref($resources) eq 'ARRAY');
1798: if (! defined($courseid)) {
1.146 albertel 1799: $courseid = $env{'request.course.id'};
1.127 matthew 1800: }
1801: #
1802: &setup_table_names($courseid);
1803: my $dbh = &Apache::lonmysql::get_dbh();
1804: my ($section_limits,$enrollment_limits)=
1805: &limit_by_section_and_status($Sections,$enrollment,'b');
1.167 raeburn 1806: my ($groups_join,$group_limits) = &limit_by_group($Groups,'b','c','d');
1.127 matthew 1807: my $symb_limits = '('.join(' OR ',map {'a.symb_id='.&get_symb_id($_);
1808: } @$resources
1809: ).')';
1.154 bowersj2 1810: my ($award_col, $award_join, $award_clause) = ('', '', '');
1.155 albertel 1811: if ($has_award_for) {
1.154 bowersj2 1812: my $resource_id = &get_symb_id($has_award_for);
1813: $award_col = ", perf.awarded";
1814: $award_join = "LEFT JOIN $performance_table AS perf ON perf.symb_id"
1815: ." = $resource_id AND perf.student_id = b.student_id ";
1816: $award_clause = "AND perf.awarded IS NOT NULL";
1817: }
1.130 matthew 1818: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
1.154 bowersj2 1819: my $request = "SELECT b.student,SUM(a.awarded*w.weight) AS score "
1820: ."$award_col FROM $performance_table AS a ".
1821: "NATURAL LEFT JOIN $weight_table AS w ".
1822: "LEFT JOIN $student_table AS b ON a.student_id=b.student_id ".
1.167 raeburn 1823: "$award_join $groups_join ";
1824: my $limits;
1.127 matthew 1825: if (defined($section_limits)) {
1.167 raeburn 1826: $limits .= $section_limits.' AND ';
1.127 matthew 1827: }
1828: if (defined($enrollment_limits)) {
1.167 raeburn 1829: $limits .= $enrollment_limits.' AND ';
1.127 matthew 1830: }
1.130 matthew 1831: if (defined($time_limits)) {
1.167 raeburn 1832: $limits .= $time_limits.' AND ';
1.130 matthew 1833: }
1.127 matthew 1834: if ($symb_limits ne '()') {
1.167 raeburn 1835: $limits .= $symb_limits.' AND ';
1836: }
1837: if (defined($group_limits)) {
1838: $limits .= $group_limits.' AND ';
1.127 matthew 1839: }
1.167 raeburn 1840: if ($limits) {
1841: $limits =~ s/( AND )$//; # Remove extra conjunction
1842: $request .= "WHERE $limits";
1843: }
1.154 bowersj2 1844: $request .= " $award_clause GROUP BY a.student_id ORDER BY score";
1.127 matthew 1845: #&Apache::lonnet::logthis('request = '.$/.$request);
1.154 bowersj2 1846: my $sth = $dbh->prepare($request) or die "Can't prepare $request";
1.127 matthew 1847: $sth->execute();
1848: my $rows = $sth->fetchall_arrayref();
1849: return ($rows);
1850: }
1851:
1852: sub get_sum_of_scores {
1.143 matthew 1853: my ($symb,$part,$students,$courseid,$starttime,$endtime) = @_;
1.127 matthew 1854: if (! defined($courseid)) {
1.146 albertel 1855: $courseid = $env{'request.course.id'};
1.127 matthew 1856: }
1.138 matthew 1857: if (defined($students) &&
1858: ((@$students == 0) ||
1859: (@$students == 1 && (! defined($students->[0]) ||
1860: $students->[0] eq ''))
1861: )
1862: ){
1863: undef($students);
1864: }
1.127 matthew 1865: #
1866: &setup_table_names($courseid);
1867: my $dbh = &Apache::lonmysql::get_dbh();
1.130 matthew 1868: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
1.127 matthew 1869: my $request = 'SELECT SUM(a.awarded*w.weight),SUM(w.weight) FROM '.
1870: $performance_table.' AS a '.
1871: 'NATURAL LEFT JOIN '.$weight_table.' AS w ';
1.143 matthew 1872: $request .= 'WHERE a.symb_id='.&get_symb_id($symb).
1.127 matthew 1873: ' AND a.part_id='.&get_part_id($part);
1.130 matthew 1874: if (defined($time_limits)) {
1875: $request .= ' AND '.$time_limits;
1876: }
1.127 matthew 1877: if (defined($students)) {
1878: $request .= ' AND ('.
1879: join(' OR ',map {'a.student_id='.&get_student_id(split(':',$_));
1880: } @$students).
1881: ')';
1882: }
1883: my $sth = $dbh->prepare($request);
1884: $sth->execute();
1885: my $rows = $sth->fetchrow_arrayref();
1886: if ($dbh->err) {
1.138 matthew 1887: &Apache::lonnet::logthis('error 1 = '.$dbh->errstr());
1888: &Apache::lonnet::logthis('prepared then executed, fetchrow_arrayrefed'.
1889: $/.$request);
1.127 matthew 1890: return (undef,undef);
1891: }
1892: return ($rows->[0],$rows->[1]);
1893: }
1894:
1.129 matthew 1895:
1896: sub score_stats {
1.167 raeburn 1897: my ($Sections,$Groups,$enrollment,$symbs,$starttime,$endtime,$courseid)=@_;
1.129 matthew 1898: if (! defined($courseid)) {
1.146 albertel 1899: $courseid = $env{'request.course.id'};
1.129 matthew 1900: }
1901: #
1902: &setup_table_names($courseid);
1903: my $dbh = &Apache::lonmysql::get_dbh();
1904: #
1905: my ($section_limits,$enrollment_limits)=
1906: &limit_by_section_and_status($Sections,$enrollment,'b');
1.167 raeburn 1907: my ($groups_join,$group_limits) = &limit_by_group($Groups,'b','c','d');
1.129 matthew 1908: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
1909: my @Symbids = map { &get_symb_id($_); } @{$symbs};
1910: #
1.181 albertel 1911: my $stats_table = &temp_table_name($courseid,'problem_stats');
1.129 matthew 1912: my $symb_restriction = join(' OR ',map {'a.symb_id='.$_;} @Symbids);
1913: my $request = 'DROP TABLE '.$stats_table;
1914: $dbh->do($request);
1915: $request =
1916: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
1917: 'SELECT a.student_id,'.
1918: 'SUM(a.awarded*w.weight) AS score FROM '.
1919: $performance_table.' AS a '.
1920: 'NATURAL LEFT JOIN '.$weight_table.' AS w '.
1921: 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.
1.167 raeburn 1922: $groups_join;
1923: my $limit = ' WHERE ('.$symb_restriction.')';
1.129 matthew 1924: if ($time_limits) {
1.167 raeburn 1925: $limit .= ' AND '.$time_limits;
1.129 matthew 1926: }
1927: if ($section_limits) {
1.167 raeburn 1928: $limit .= ' AND '.$section_limits;
1.129 matthew 1929: }
1930: if ($enrollment_limits) {
1.167 raeburn 1931: $limit .= ' AND '.$enrollment_limits;
1.129 matthew 1932: }
1.167 raeburn 1933: if ($group_limits) {
1934: $limit .= ' AND '.$group_limits;
1935: }
1936: $request .= $limit.' GROUP BY a.student_id';
1.129 matthew 1937: # &Apache::lonnet::logthis('request = '.$/.$request);
1938: my $sth = $dbh->prepare($request);
1939: $sth->execute();
1940: $request =
1941: 'SELECT AVG(score),STD(score),MAX(score),MIN(score),COUNT(score) '.
1942: 'FROM '.$stats_table;
1943: my ($ave,$std,$max,$min,$count) = &execute_SQL_request($dbh,$request);
1944: # &Apache::lonnet::logthis('request = '.$/.$request);
1945:
1946: $request = 'SELECT SUM(weight) FROM '.$weight_table.
1.152 bowersj2 1947: ' AS a WHERE ('.$symb_restriction.')';
1.129 matthew 1948: my ($max_possible) = &execute_SQL_request($dbh,$request);
1949: # &Apache::lonnet::logthis('request = '.$/.$request);
1950: return($min,$max,$ave,$std,$count,$max_possible);
1951: }
1952:
1953:
1954:
1955: sub count_stats {
1.167 raeburn 1956: my ($Sections,$Groups,$enrollment,$symbs,$starttime,$endtime,$courseid)=@_;
1.129 matthew 1957: if (! defined($courseid)) {
1.146 albertel 1958: $courseid = $env{'request.course.id'};
1.129 matthew 1959: }
1960: #
1961: &setup_table_names($courseid);
1962: my $dbh = &Apache::lonmysql::get_dbh();
1963: #
1964: my ($section_limits,$enrollment_limits)=
1965: &limit_by_section_and_status($Sections,$enrollment,'b');
1.167 raeburn 1966: my ($groups_join,$group_limits) = &limit_by_group($Groups,'b','c','d');
1.129 matthew 1967: my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a');
1968: my @Symbids = map { &get_symb_id($_); } @{$symbs};
1969: #
1.181 albertel 1970: my $stats_table = &temp_table_name($courseid,'problem_stats');
1.129 matthew 1971: my $symb_restriction = join(' OR ',map {'a.symb_id='.$_;} @Symbids);
1972: my $request = 'DROP TABLE '.$stats_table;
1973: $dbh->do($request);
1974: $request =
1975: 'CREATE TEMPORARY TABLE '.$stats_table.' '.
1976: 'SELECT a.student_id,'.
1.151 albertel 1977: 'SUM(a.awarded) AS count FROM '.
1.129 matthew 1978: $performance_table.' AS a '.
1979: 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '.
1.167 raeburn 1980: $groups_join;
1981: my $limit = ' WHERE ('.$symb_restriction.')';
1.129 matthew 1982: if ($time_limits) {
1.167 raeburn 1983: $limit .= ' AND '.$time_limits;
1.129 matthew 1984: }
1985: if ($section_limits) {
1.167 raeburn 1986: $limit .= ' AND '.$section_limits;
1.129 matthew 1987: }
1988: if ($enrollment_limits) {
1.167 raeburn 1989: $limit .= ' AND '.$enrollment_limits;
1.129 matthew 1990: }
1.167 raeburn 1991: if ($group_limits) {
1.168 raeburn 1992: $limit .= ' AND '.$group_limits;
1.167 raeburn 1993: }
1994: $request .= $limit.' GROUP BY a.student_id';
1.131 matthew 1995: # &Apache::lonnet::logthis('request = '.$/.$request);
1.129 matthew 1996: my $sth = $dbh->prepare($request);
1997: $sth->execute();
1998: $request =
1999: 'SELECT AVG(count),STD(count),MAX(count),MIN(count),COUNT(count) '.
2000: 'FROM '.$stats_table;
2001: my ($ave,$std,$max,$min,$count) = &execute_SQL_request($dbh,$request);
1.131 matthew 2002: # &Apache::lonnet::logthis('request = '.$/.$request);
1.129 matthew 2003: return($min,$max,$ave,$std,$count);
2004: }
1.127 matthew 2005:
2006:
1.105 matthew 2007: sub get_student_data {
2008: my ($students,$courseid) = @_;
1.146 albertel 2009: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.105 matthew 2010: &setup_table_names($courseid);
2011: my $dbh = &Apache::lonmysql::get_dbh();
2012: return undef if (! defined($dbh));
2013: my $request = 'SELECT '.
2014: 'student_id, student '.
2015: 'FROM '.$student_table;
2016: if (defined($students)) {
2017: $request .= ' WHERE ('.
2018: join(' OR ', map {'student_id='.
2019: &get_student_id($_->{'username'},
2020: $_->{'domain'})
2021: } @$students
2022: ).')';
2023: }
2024: $request.= ' ORDER BY student_id';
2025: my $sth = $dbh->prepare($request);
2026: $sth->execute();
2027: if ($dbh->err) {
1.138 matthew 2028: &Apache::lonnet::logthis('error 2 = '.$dbh->errstr());
2029: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
1.105 matthew 2030: return undef;
2031: }
2032: my $dataset = $sth->fetchall_arrayref();
2033: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2034: return $dataset;
2035: }
2036: }
2037:
1.159 albertel 2038: sub RD_student_id { return 0; }
2039: sub RD_awarddetail { return 1; }
2040: sub RD_response_eval { return 2; }
2041: sub RD_response_eval_2 { return 3; }
2042: sub RD_submission { return 4; }
2043: sub RD_timestamp { return 5; }
2044: sub RD_tries { return 6; }
2045: sub RD_sname { return 7; }
1.108 matthew 2046:
2047: sub get_response_data {
1.167 raeburn 2048: my ($Sections,$Groups,$enrollment,$symb,$response,$courseid) = @_;
1.103 matthew 2049: return undef if (! defined($symb) ||
1.100 matthew 2050: ! defined($response));
1.146 albertel 2051: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.100 matthew 2052: #
2053: &setup_table_names($courseid);
2054: my $symb_id = &get_symb_id($symb);
1.137 matthew 2055: if (! defined($symb_id)) {
2056: &Apache::lonnet::logthis('Unable to find symb for '.$symb.' in '.$courseid);
2057: return undef;
2058: }
1.100 matthew 2059: my $response_id = &get_part_id($response);
1.137 matthew 2060: if (! defined($response_id)) {
2061: &Apache::lonnet::logthis('Unable to find id for '.$response.' in '.$courseid);
2062: return undef;
2063: }
1.100 matthew 2064: #
2065: my $dbh = &Apache::lonmysql::get_dbh();
2066: return undef if (! defined($dbh));
1.126 matthew 2067: #
1.127 matthew 2068: my ($student_requirements,$enrollment_requirements) =
2069: &limit_by_section_and_status($Sections,$enrollment,'d');
1.167 raeburn 2070: my ($groups_join,$group_limits) = &limit_by_group($Groups,'d','e','f');
1.100 matthew 2071: my $request = 'SELECT '.
1.105 matthew 2072: 'a.student_id, a.awarddetail, a.response_specific_value, '.
1.159 albertel 2073: 'a.response_specific_value_2, a.submission, b.timestamp, '.
2074: 'c.tries, d.student '.
1.100 matthew 2075: 'FROM '.$fulldump_response_table.' AS a '.
2076: 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2077: 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2078: 'a.transaction = b.transaction '.
2079: 'LEFT JOIN '.$fulldump_part_table.' AS c '.
2080: 'ON a.symb_id=c.symb_id AND a.student_id=c.student_id AND '.
2081: 'a.part_id=c.part_id AND a.transaction = c.transaction '.
1.108 matthew 2082: 'LEFT JOIN '.$student_table.' AS d '.
2083: 'ON a.student_id=d.student_id '.
1.167 raeburn 2084: $groups_join;
2085: my $limit = ' WHERE '.
1.100 matthew 2086: 'a.symb_id='.$symb_id.' AND a.response_id='.$response_id;
1.167 raeburn 2087: if (defined($student_requirements)) {
2088: $limit .= ' AND '.$student_requirements;
2089: }
2090: if (defined($enrollment_requirements)) {
2091: $limit .= ' AND '.$enrollment_requirements;
2092: }
2093: if (defined($group_limits)) {
1.168 raeburn 2094: $limit .= ' AND '.$group_limits;
1.100 matthew 2095: }
1.167 raeburn 2096: $request .= $limit.' ORDER BY b.timestamp';
1.103 matthew 2097: # &Apache::lonnet::logthis("request =\n".$request);
1.100 matthew 2098: my $sth = $dbh->prepare($request);
2099: $sth->execute();
1.105 matthew 2100: if ($dbh->err) {
1.138 matthew 2101: &Apache::lonnet::logthis('error 3 = '.$dbh->errstr());
2102: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
1.105 matthew 2103: return undef;
2104: }
1.100 matthew 2105: my $dataset = $sth->fetchall_arrayref();
2106: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
1.117 matthew 2107: # Clear the \'s from around the submission
2108: for (my $i =0;$i<scalar(@$dataset);$i++) {
1.176 albertel 2109: $dataset->[$i]->[&RD_submission()] =~ s/(\'$|^\')//g;
1.117 matthew 2110: }
1.103 matthew 2111: return $dataset;
1.100 matthew 2112: }
1.118 matthew 2113: }
2114:
2115:
1.159 albertel 2116: sub RDs_awarddetail { return 3; }
2117: sub RDs_submission { return 2; }
2118: sub RDs_timestamp { return 1; }
2119: sub RDs_tries { return 0; }
2120: sub RDs_awarded { return 4; }
2121: sub RDs_response_eval { return 5; }
2122: sub RDs_response_eval_2 { return 6; }
1.160 albertel 2123: sub RDs_part_award { return 7; }
1.118 matthew 2124:
2125: sub get_response_data_by_student {
2126: my ($student,$symb,$response,$courseid) = @_;
2127: return undef if (! defined($symb) ||
2128: ! defined($response));
1.146 albertel 2129: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.118 matthew 2130: #
2131: &setup_table_names($courseid);
2132: my $symb_id = &get_symb_id($symb);
2133: my $response_id = &get_part_id($response);
2134: #
2135: my $student_id = &get_student_id($student->{'username'},
2136: $student->{'domain'});
2137: #
2138: my $dbh = &Apache::lonmysql::get_dbh();
2139: return undef if (! defined($dbh));
2140: my $request = 'SELECT '.
1.159 albertel 2141: 'c.tries, b.timestamp, a.submission, a.awarddetail, c.awarded, '.
1.160 albertel 2142: 'a.response_specific_value, a.response_specific_value_2, c.award '.
1.118 matthew 2143: 'FROM '.$fulldump_response_table.' AS a '.
2144: 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2145: 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2146: 'a.transaction = b.transaction '.
2147: 'LEFT JOIN '.$fulldump_part_table.' AS c '.
2148: 'ON a.symb_id=c.symb_id AND a.student_id=c.student_id AND '.
2149: 'a.part_id=c.part_id AND a.transaction = c.transaction '.
2150: 'LEFT JOIN '.$student_table.' AS d '.
2151: 'ON a.student_id=d.student_id '.
1.119 matthew 2152: 'LEFT JOIN '.$performance_table.' AS e '.
2153: 'ON a.symb_id=e.symb_id AND a.part_id=e.part_id AND '.
2154: 'a.student_id=e.student_id AND c.tries=e.tries '.
1.118 matthew 2155: 'WHERE '.
2156: 'a.symb_id='.$symb_id.' AND a.response_id='.$response_id.
2157: ' AND a.student_id='.$student_id.' ORDER BY b.timestamp';
1.125 matthew 2158: # &Apache::lonnet::logthis("request =\n".$request);
1.118 matthew 2159: my $sth = $dbh->prepare($request);
2160: $sth->execute();
2161: if ($dbh->err) {
1.138 matthew 2162: &Apache::lonnet::logthis('error 4 = '.$dbh->errstr());
2163: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
1.118 matthew 2164: return undef;
2165: }
2166: my $dataset = $sth->fetchall_arrayref();
2167: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2168: # Clear the \'s from around the submission
2169: for (my $i =0;$i<scalar(@$dataset);$i++) {
1.176 albertel 2170: $dataset->[$i]->[&RDs_submission] =~ s/(\'$|^\')//g;
1.118 matthew 2171: }
2172: return $dataset;
2173: }
2174: return undef; # error occurred
1.106 matthew 2175: }
1.108 matthew 2176:
2177: sub RT_student_id { return 0; }
2178: sub RT_awarded { return 1; }
2179: sub RT_tries { return 2; }
2180: sub RT_timestamp { return 3; }
1.106 matthew 2181:
2182: sub get_response_time_data {
1.167 raeburn 2183: my ($sections,$groups,$enrollment,$symb,$part,$courseid) = @_;
1.106 matthew 2184: return undef if (! defined($symb) ||
1.107 matthew 2185: ! defined($part));
1.146 albertel 2186: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.106 matthew 2187: #
2188: &setup_table_names($courseid);
2189: my $symb_id = &get_symb_id($symb);
1.142 matthew 2190: if (! defined($symb_id)) {
2191: &Apache::lonnet::logthis('Unable to find symb for '.$symb.' in '.$courseid);
2192: return undef;
2193: }
1.107 matthew 2194: my $part_id = &get_part_id($part);
1.142 matthew 2195: if (! defined($part_id)) {
2196: &Apache::lonnet::logthis('Unable to find id for '.$part.' in '.$courseid);
2197: return undef;
2198: }
1.106 matthew 2199: #
2200: my $dbh = &Apache::lonmysql::get_dbh();
2201: return undef if (! defined($dbh));
1.142 matthew 2202: my ($student_requirements,$enrollment_requirements) =
2203: &limit_by_section_and_status($sections,$enrollment,'d');
1.167 raeburn 2204: my ($groups_join,$group_limits) = &limit_by_group($groups,'d','e','f');
1.106 matthew 2205: my $request = 'SELECT '.
1.107 matthew 2206: 'a.student_id, a.awarded, a.tries, b.timestamp '.
2207: 'FROM '.$fulldump_part_table.' AS a '.
1.142 matthew 2208: 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
2209: 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
2210: 'a.transaction = b.transaction '.
2211: 'LEFT JOIN '.$student_table.' as d '.
2212: 'ON a.student_id=d.student_id '.
1.167 raeburn 2213: $groups_join;
2214: my $limit = ' WHERE '.
1.107 matthew 2215: 'a.symb_id='.$symb_id.' AND a.part_id='.$part_id;
1.167 raeburn 2216: if (defined($student_requirements)) {
2217: $limit .= ' AND '.$student_requirements;
2218: }
2219: if (defined($enrollment_requirements)) {
2220: $limit .= ' AND '.$enrollment_requirements;
2221: }
2222: if (defined($group_limits)) {
2223: $limit .= ' AND '.$group_limits;
1.106 matthew 2224: }
1.167 raeburn 2225: $request .= $limit.' ORDER BY b.timestamp';
1.106 matthew 2226: # &Apache::lonnet::logthis("request =\n".$request);
2227: my $sth = $dbh->prepare($request);
2228: $sth->execute();
2229: if ($dbh->err) {
1.138 matthew 2230: &Apache::lonnet::logthis('error 5 = '.$dbh->errstr());
2231: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
1.106 matthew 2232: return undef;
2233: }
2234: my $dataset = $sth->fetchall_arrayref();
2235: if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
2236: return $dataset;
2237: }
2238:
1.100 matthew 2239: }
1.61 matthew 2240:
1.113 matthew 2241: sub get_student_scores {
1.167 raeburn 2242: my ($sections,$groups,$Symbs,$enrollment,$courseid,$starttime,$endtime) = @_;
1.146 albertel 2243: $courseid = $env{'request.course.id'} if (! defined($courseid));
1.113 matthew 2244: &setup_table_names($courseid);
2245: my $dbh = &Apache::lonmysql::get_dbh();
2246: return (undef) if (! defined($dbh));
1.181 albertel 2247: my $tmptable = &temp_table_name($courseid,'temp_'.time);
1.145 matthew 2248: my $request = 'DROP TABLE IF EXISTS '.$tmptable;
2249: # &Apache::lonnet::logthis('request = '.$/.$request);
2250: $dbh->do($request);
1.114 matthew 2251: #
2252: my $symb_requirements;
1.113 matthew 2253: if (defined($Symbs) && @$Symbs) {
2254: $symb_requirements = '('.
1.114 matthew 2255: join(' OR ', map{ "(a.symb_id='".&get_symb_id($_->{'symb'}).
1.121 matthew 2256: "' AND a.part_id='".&get_part_id($_->{'part'}).
2257: "')"
1.113 matthew 2258: } @$Symbs).')';
2259: }
1.114 matthew 2260: #
1.145 matthew 2261: my ($student_requirements,$enrollment_requirements) =
2262: &limit_by_section_and_status($sections,$enrollment,'b');
1.114 matthew 2263: #
1.167 raeburn 2264: my ($groups_join,$group_limits) = &limit_by_group($groups,'b','d','e');
1.145 matthew 2265: my $time_requirements = &limit_by_start_end_time($starttime,$endtime,'a');
1.114 matthew 2266: ##
1.145 matthew 2267: $request = 'CREATE TEMPORARY TABLE IF NOT EXISTS '.$tmptable.
2268: ' SELECT a.student_id,SUM(a.awarded*c.weight) AS score FROM '.
1.114 matthew 2269: $performance_table.' AS a ';
1.145 matthew 2270: $request .= "LEFT JOIN ".$weight_table.' AS c ON a.symb_id=c.symb_id AND a.part_id=c.part_id ';
1.114 matthew 2271: if (defined($student_requirements) || defined($enrollment_requirements)) {
1.167 raeburn 2272: $request .= ' LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id ';
2273: }
2274: if (defined($groups_join)) {
2275: $request .= $groups_join;
1.114 matthew 2276: }
1.167 raeburn 2277: if (defined($symb_requirements) ||
2278: defined($student_requirements) ||
2279: defined($enrollment_requirements) ||
2280: defined($group_limits) ) {
1.113 matthew 2281: $request .= ' WHERE ';
2282: }
1.114 matthew 2283: if (defined($symb_requirements)) {
2284: $request .= $symb_requirements.' AND ';
2285: }
2286: if (defined($student_requirements)) {
2287: $request .= $student_requirements.' AND ';
2288: }
2289: if (defined($enrollment_requirements)) {
2290: $request .= $enrollment_requirements.' AND ';
2291: }
1.121 matthew 2292: if (defined($time_requirements)) {
2293: $request .= $time_requirements.' AND ';
2294: }
2295: $request =~ s/ AND $//; # Strip of the trailing ' AND '.
1.114 matthew 2296: $request .= ' GROUP BY a.student_id';
2297: # &Apache::lonnet::logthis("request = \n".$request);
1.113 matthew 2298: my $sth = $dbh->prepare($request);
2299: $sth->execute();
2300: if ($dbh->err) {
1.138 matthew 2301: &Apache::lonnet::logthis('error 6 = '.$dbh->errstr());
2302: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
1.113 matthew 2303: return undef;
2304: }
2305: $request = 'SELECT score,COUNT(*) FROM '.$tmptable.' GROUP BY score';
2306: # &Apache::lonnet::logthis("request = \n".$request);
2307: $sth = $dbh->prepare($request);
2308: $sth->execute();
2309: if ($dbh->err) {
1.138 matthew 2310: &Apache::lonnet::logthis('error 7 = '.$dbh->errstr());
2311: &Apache::lonnet::logthis('prepared then executed '.$/.$request);
1.113 matthew 2312: return undef;
2313: }
2314: my $dataset = $sth->fetchall_arrayref();
2315: return $dataset;
2316: }
2317:
1.61 matthew 2318:
2319:
2320: sub setup_table_names {
2321: my ($courseid) = @_;
2322: if (! defined($courseid)) {
1.146 albertel 2323: $courseid = $env{'request.course.id'};
1.61 matthew 2324: }
2325: #
2326: if (! defined($current_course) || $current_course ne $courseid) {
2327: # Clear out variables
2328: $have_read_part_table = 0;
2329: undef(%ids_by_part);
2330: undef(%parts_by_id);
2331: $have_read_symb_table = 0;
2332: undef(%ids_by_symb);
2333: undef(%symbs_by_id);
2334: $have_read_student_table = 0;
2335: undef(%ids_by_student);
2336: undef(%students_by_id);
1.167 raeburn 2337: $have_read_groupnames_table = 0;
2338: undef(%ids_by_groupname);
1.61 matthew 2339: #
2340: $current_course = $courseid;
2341: }
2342: #
2343: # Set up database names
1.181 albertel 2344: my $base_id = 'md5_'.&Digest::MD5::md5_hex($courseid);
1.167 raeburn 2345: $symb_table = $base_id.'_'.'symb';
2346: $part_table = $base_id.'_'.'part';
2347: $student_table = $base_id.'_'.'student';
2348: $groupnames_table = $base_id.'_'.'groupnames';
2349: $students_groups_table = $base_id.'_'.'studentgroups';
2350: $performance_table = $base_id.'_'.'performance';
2351: $parameters_table = $base_id.'_'.'parameters';
1.89 matthew 2352: $fulldump_part_table = $base_id.'_'.'partdata';
2353: $fulldump_response_table = $base_id.'_'.'responsedata';
2354: $fulldump_timestamp_table = $base_id.'_'.'timestampdata';
1.127 matthew 2355: $weight_table = $base_id.'_'.'weight';
1.89 matthew 2356: #
2357: @Tables = (
2358: $symb_table,
2359: $part_table,
2360: $student_table,
1.167 raeburn 2361: $groupnames_table,
2362: $students_groups_table,
1.89 matthew 2363: $performance_table,
2364: $parameters_table,
2365: $fulldump_part_table,
2366: $fulldump_response_table,
2367: $fulldump_timestamp_table,
1.127 matthew 2368: $weight_table,
1.89 matthew 2369: );
1.61 matthew 2370: return;
1.3 stredwic 2371: }
1.1 stredwic 2372:
1.181 albertel 2373: sub temp_table_name {
2374: my ($courseid,$affix) = @_;
2375: my $base_id = 'md5_'.&Digest::MD5::md5_hex($courseid);
2376: return $base_id.'_'.$affix;
2377: }
2378:
1.57 matthew 2379:
1.89 matthew 2380: } # End scope of table identifiers
1.57 matthew 2381:
2382:
2383:
1.190 jms 2384: sub CL_SDOM { return 0; }
2385: sub CL_SNAME { return 1; }
2386: sub CL_END { return 2; }
2387: sub CL_START { return 3; }
2388: sub CL_ID { return 4; }
2389: sub CL_SECTION { return 5; }
2390: sub CL_FULLNAME { return 6; }
2391: sub CL_STATUS { return 7; }
2392: sub CL_TYPE { return 8; }
2393: sub CL_LOCKEDTYPE { return 9; }
1.194 raeburn 2394: sub CL_CREDITS { return 10; }
2395: sub CL_GROUP { return 11; }
2396: sub CL_PERMANENTEMAIL { return 12; }
2397: sub CL_ROLE { return 13; }
2398: sub CL_EXTENT { return 14; }
2399: sub CL_PHOTO { return 15; }
2400: sub CL_THUMBNAIL { return 16; }
1.195 raeburn 2401: sub CL_AUTHORQUOTA { return 17; }
2402: sub CL_AUTHORUSAGE { return 18; }
1.57 matthew 2403:
1.190 jms 2404: sub get_classlist {
2405: my ($cdom,$cnum) = @_;
1.150 albertel 2406: my $cid = $cdom.'_'.$cnum;
2407: if (!defined($cdom) || !defined($cnum)) {
2408: $cid = $env{'request.course.id'};
2409: $cdom = $env{'course.'.$cid.'.domain'};
2410: $cnum = $env{'course.'.$cid.'.num'};
2411: }
1.57 matthew 2412: my $now = time;
1.35 matthew 2413: #
2414: my %classlist=&Apache::lonnet::dump('classlist',$cdom,$cnum);
2415: while (my ($student,$info) = each(%classlist)) {
1.60 matthew 2416: if ($student =~ /^(con_lost|error|no_such_host)/i) {
2417: &Apache::lonnet::logthis('get_classlist error for '.$cid.':'.$student);
2418: return undef;
2419: }
1.35 matthew 2420: my ($sname,$sdom) = split(/:/,$student);
2421: my @Values = split(/:/,$info);
1.194 raeburn 2422: my ($end,$start,$id,$section,$fullname,$type,$lockedtype,$credits);
1.35 matthew 2423: if (@Values > 2) {
1.194 raeburn 2424: ($end,$start,$id,$section,$fullname,$type,$lockedtype,$credits) = @Values;
1.35 matthew 2425: } else { # We have to get the data ourselves
2426: ($end,$start) = @Values;
1.37 matthew 2427: $section = &Apache::lonnet::getsection($sdom,$sname,$cid);
1.35 matthew 2428: my %info=&Apache::lonnet::get('environment',
2429: ['firstname','middlename',
2430: 'lastname','generation','id'],
2431: $sdom, $sname);
2432: my ($tmp) = keys(%info);
2433: if ($tmp =~/^(con_lost|error|no_such_host)/i) {
2434: $fullname = 'not available';
2435: $id = 'not available';
1.38 matthew 2436: &Apache::lonnet::logthis('unable to retrieve environment '.
2437: 'for '.$sname.':'.$sdom);
1.35 matthew 2438: } else {
1.141 albertel 2439: $fullname = &Apache::lonnet::format_name(@info{qw/firstname middlename lastname generation/},'lastname');
1.35 matthew 2440: $id = $info{'id'};
2441: }
1.36 matthew 2442: # Update the classlist with this students information
2443: if ($fullname ne 'not available') {
1.141 albertel 2444: my $enrolldata = join(':',$end,$start,$id,$section,$fullname);
2445: my $reply=&Apache::lonnet::cput('classlist',
1.36 matthew 2446: {$student => $enrolldata},
2447: $cdom,$cnum);
2448: if ($reply !~ /^(ok|delayed)/) {
2449: &Apache::lonnet::logthis('Unable to update classlist for '.
2450: 'student '.$sname.':'.$sdom.
2451: ' error:'.$reply);
2452: }
2453: }
1.35 matthew 2454: }
2455: my $status='Expired';
2456: if(((!$end) || $now < $end) && ((!$start) || ($now > $start))) {
2457: $status='Active';
2458: }
1.174 albertel 2459: if(($now < $start) && ((!$end) || $now < $end )) {
2460: $status='Future';
2461: }
1.35 matthew 2462: $classlist{$student} =
1.194 raeburn 2463: [$sdom,$sname,$end,$start,$id,$section,$fullname,$status,$type,
2464: $lockedtype,$credits];
1.35 matthew 2465: }
2466: if (wantarray()) {
2467: return (\%classlist,['domain','username','end','start','id',
1.194 raeburn 2468: 'section','fullname','status','type',
2469: 'lockedtype','credits']);
1.35 matthew 2470: } else {
2471: return \%classlist;
2472: }
2473: }
2474:
1.166 raeburn 2475: sub get_group_memberships {
1.170 raeburn 2476: my ($classlist,$keylist,$cdom,$cnum) = @_;
1.172 albertel 2477:
2478: return ({},{}) if (!ref($classlist) || !ref($keylist));
2479:
1.166 raeburn 2480: my $cid = $cdom.'_'.$cnum;
2481: if (!defined($cdom) || !defined($cnum)) {
2482: $cid = $env{'request.course.id'};
2483: $cdom = $env{'course.'.$cid.'.domain'};
2484: $cnum = $env{'course.'.$cid.'.num'};
2485: }
2486: my (%classgroups,%studentgroups);
2487: my $now = time;
2488: my $access_end = $env{'course.'.$cid.'.default_enrollment_end_date'};
1.171 raeburn 2489: my %curr_groups =&Apache::longroup::coursegroups($cdom,$cnum);
1.169 albertel 2490: if (%curr_groups) {
1.183 banghart 2491: my $grpindex = &CL_GROUP();
1.169 albertel 2492: my %groupmemberhash =
2493: &Apache::lonnet::get_group_membership($cdom,$cnum);
1.166 raeburn 2494: foreach my $student (keys(%{$classlist})) {
2495: %{$classgroups{$student}} = ();
2496: my $hasgroup = 0;
2497: foreach my $status ('previous','future','active','aftercourse') {
2498: %{$classgroups{$student}{$status}} = ();
2499: }
2500: foreach my $group (keys(%curr_groups)) {
2501: if (defined($groupmemberhash{$group.':'.$student})) {
2502: my ($end,$start) = split(/:/,$groupmemberhash{$group.':'.
2503: $student});
2504: if ($start == -1) {
2505: next;
2506: } else {
2507: $studentgroups{$group} ++;
2508: $hasgroup = 1;
2509: if ($end && $end < $now) {
2510: $classgroups{$student}{'previous'}{$group} =
2511: $groupmemberhash{$group.':'.$student};
2512: if ($classlist->{$student}[&CL_STATUS()] eq 'Expired') {
2513: if ($access_end && $access_end < $now) {
2514: if ($access_end - $end < 86400) {
2515: $classgroups{$student}{'aftercourse'}{$group} = $groupmemberhash{$group.':'.$student};
2516: }
2517: }
2518: }
2519: } elsif ($now > $start) {
2520: if (!$end || $end > $now) {
2521: $classgroups{$student}{'active'}{$group} =
2522: $groupmemberhash{$group.':'.$student};
2523: }
2524: } else {
2525: $classgroups{$student}{'future'}{$group} =
2526: $groupmemberhash{$group.':'.$student};
2527: }
2528: }
2529: }
2530: }
2531: if (!$hasgroup) {
2532: $studentgroups{'none'} ++;
1.170 raeburn 2533: } else {
2534: $classlist->{$student}->[$grpindex] = join(',',
2535: sort(keys(%{$classgroups{$student}{'active'}})));
1.166 raeburn 2536: }
2537: }
2538: }
2539: return (\%classgroups,\%studentgroups);
2540: }
2541:
2542: sub get_students_groups {
2543: my ($student,$enrollment_status,$classgroups) = @_;
2544: my @studentsgroups = ();
2545: if (ref($$classgroups{$student}{'active'}) eq 'HASH') {
2546: push(@studentsgroups,keys(%{$$classgroups{$student}{'active'}}));
2547: }
2548: if ($enrollment_status eq 'Any') {
2549: foreach my $status ('previous','future') {
2550: if (ref($$classgroups{$student}{$status}) eq 'HASH') {
2551: push(@studentsgroups,keys(%{$$classgroups{$student}{$status}}));
2552: }
2553: }
2554: } else {
2555: if (ref($$classgroups{$student}{'aftercourse'}) eq 'HASH') {
2556: push(@studentsgroups,keys(%{$$classgroups{$student}{'aftercourse'}}));
2557: }
2558: }
2559: return @studentsgroups;
2560: }
2561:
2562:
1.1 stredwic 2563: # ----- END HELPER FUNCTIONS --------------------------------------------
2564:
2565: 1;
2566: __END__
1.36 matthew 2567:
1.190 jms 2568:
2569: =pod
2570:
2571: =head1 NAME
2572:
2573: Apache::loncoursedata
2574:
2575: =head1 SYNOPSIS
2576:
2577: Set of functions that download and process student and course information.
2578:
2579: =head1 PACKAGES USED
2580:
2581: Apache::lonnet
2582: Apache::longroup
2583: Time::HiRes
2584: Apache::lonmysql
2585: LONCAPA
2586: Digest::MD5
2587:
2588: =head1 DOWNLOAD INFORMATION
2589:
2590: This section contains all the functions that get data from other servers
2591: and/or itself.
2592:
2593:
2594:
2595: =head1 LOCAL DATA CACHING SUBROUTINES
2596:
2597: The local caching is done using MySQL. There is no fall-back implementation
2598: if MySQL is not running.
2599:
2600: The programmers interface is to call &get_current_state() or some other
2601: primary interface subroutine (described below). The internals of this
2602: storage system are documented here.
2603:
2604: There are six tables used to store student performance data (the results of
2605: a dumpcurrent). Each of these tables is created in MySQL with a name of
2606: $courseid_*****, where ***** is 'symb', 'part', or whatever is appropriate
2607: for the table. The tables and their purposes are described below.
2608:
2609: Some notes before we get started.
2610:
2611: Each table must have a PRIMARY KEY, which is a column or set of columns which
2612: will serve to uniquely identify a row of data. NULL is not allowed!
2613:
2614: INDEXes work best on integer data.
2615:
2616: JOIN is used to combine data from many tables into one output.
2617:
2618: lonmysql.pm is used for some of the interface, specifically the table creation
2619: calls. The inserts are done in bulk by directly calling the database handler.
2620: The SELECT ... JOIN statement used to retrieve the data does not have an
2621: interface in lonmysql.pm and I shudder at the thought of writing one.
2622:
2623: =head2 Table Descriptions
2624:
2625: =over 4
2626:
2627: =head2 Tables used to store meta information
2628:
2629: The following tables hold data required to keep track of the current status
2630: of a students data in the tables or to look up the students data in the tables.
2631:
2632: =over 4
2633:
2634: =item C<$symb_table>
2635:
2636: The symb_table has two columns. The first is a 'symb_id' and the second
2637: is the text name for the 'symb' (limited to 64k). The 'symb_id' is generated
2638: automatically by MySQL so inserts should be done on this table with an
2639: empty first element. This table has its PRIMARY KEY on the 'symb_id'.
2640:
2641: =item C<$part_table>
2642:
2643: The part_table has two columns. The first is a 'part_id' and the second
2644: is the text name for the 'part' (limited to 100 characters). The 'part_id' is
2645: generated automatically by MySQL so inserts should be done on this table with
2646: an empty first element. This table has its PRIMARY KEY on the 'part' (100
2647: characters) and a KEY on 'part_id'.
2648:
2649: =item C<$student_table>
2650:
2651: The student_table has 7 columns. The first is a 'student_id' assigned by
2652: MySQL. The second is 'student' which is username:domain. The third through
2653: fifth are 'section', 'status' (enrollment status), and 'classification'
2654: (to be used in the future). The sixth and seventh ('updatetime' and
2655: 'fullupdatetime') contain the time of last update and full update of student
2656: data. This table has its PRIMARY KEY on the 'student_id' column and is indexed
2657: on 'student', 'section', and 'status'.
2658:
2659: =item C<$groupnames_table>
2660:
2661: The groupnames_table has 2 columns. The first is a 'group_id' assigned by
2662: MySQL. The second is 'groupname' which is the name of the group in the course.
2663:
2664: =item C<$students_groups_table>
2665:
2666: The students_groups_table has 2 columns. The first is the 'student_id', and the
2667: second is the 'group_id'. These two columns comprise the PRIMARY KEY for this
2668: table, as an individual student may be affiliated with more than one group at
2669: any time. This table is indexed on both student_id and group_id.
2670:
2671: =back
2672:
2673: =head2 Tables used to store current status data
2674:
2675: The following tables store data only about the students current status on
2676: a problem, meaning only the data related to the last attempt on a problem.
2677:
2678: =over 4
2679:
2680: =item C<$performance_table>
2681:
2682: The performance_table has 9 columns. The first three are 'symb_id',
2683: 'student_id', and 'part_id'. These comprise the PRIMARY KEY for this table
2684: and are directly related to the $symb_table, $student_table, and $part_table
2685: described above. MySQL does better indexing on numeric items than text,
2686: so we use these three "index tables". The remaining columns are
2687: 'solved', 'tries', 'awarded', 'award', 'awarddetail', and 'timestamp'.
2688: These are either the MySQL type TINYTEXT or various integers ('tries' and
2689: 'timestamp'). This table has KEYs of 'student_id' and 'symb_id'.
2690: For use of this table, see the functions described below.
2691:
2692: =item C<$parameters_table>
2693:
2694: The parameters_table holds the data that does not fit neatly into the
2695: performance_table. The parameters table has four columns: 'symb_id',
2696: 'student_id', 'parameter', and 'value'. 'symb_id', 'student_id', and
2697: 'parameter' comprise the PRIMARY KEY for this table. 'parameter' is
2698: limited to 255 characters. 'value' is limited to 64k characters.
2699:
2700: =back
2701:
2702: =head2 Tables used for storing historic data
2703:
2704: The following tables are used to store almost all of the transactions a student
2705: has made on a homework problem. See loncapa/docs/homework/datastorage for
2706: specific information about each of the parameters stored.
2707:
2708: =over 4
2709:
2710: =item C<$fulldump_response_table>
2711:
2712: The response table holds data (documented in loncapa/docs/homework/datastorage)
2713: associated with a particular response id which is stored when a student
2714: attempts a problem. The following are the columns of the table, in order:
2715: 'symb_id','part_id','response_id','student_id','transaction','tries',
2716: 'awarddetail', 'response_specific', 'response_specific_value',
2717: 'response_specific_2', 'response_specific_value_2', and 'submission
2718: (the text of the students submission). The primary key is based on the
2719: first five columns listed above.
2720:
2721: =item C<$fulldump_part_table()>
2722:
2723: The part table holds data (documented in loncapa/docs/homework/datastorage)
2724: associated with a particular part id which is stored when a student attempts
2725: a problem. The following are the columns of the table, in order:
2726: 'symb_id','part_id','student_id','transaction','tries','award','awarded',
2727: and 'previous'. The primary key is based on the first five columns listed
2728: above.
2729:
2730: =item C<$fulldump_timestamp_table()>
2731:
2732: The timestamp table holds the timestamps of the transactions which are
2733: stored in $fulldump_response_table and $fulldump_part_table. This data is
2734: about both the response and part data. Columns: 'symb_id','student_id',
2735: 'transaction', and 'timestamp'.
2736: The primary key is based on the first 3 columns.
2737:
2738: =item C<$weight_table()>
2739:
2740: The weight table holds the weight for the problems used in the class.
2741: Whereas the weight of a problem can vary by section and student the data
2742: here is applied to the class as a whole.
2743: Columns: 'symb_id','part_id','response_id','weight'.
2744:
2745: =back
2746:
2747:
2748: =head1 IMPORTANT SUBROUTINES
2749:
2750: Here is a brief overview of the subroutines which are likely to be of
2751: interest:
2752:
2753: =over 4
2754:
2755: =item C<&get_current_state()>
2756:
2757: programmers interface.
2758:
2759: =item C<&init_dbs()>
2760:
2761: table creation
2762:
2763: =item C<&update_student_data()>
2764:
2765: data storage calls
2766:
2767: =item C<&get_student_data_from_performance_cache()>
2768:
2769: data retrieval
2770:
2771: =back
2772:
2773: =head1 OTHER SUBROUTINES
2774:
2775: =over 4
2776:
2777: =item C<&make_into_hash($values)>
2778:
2779: Returns a reference to a hash as described by $values. $values is
2780: assumed to be the result of
2781: join(':',map {&escape($_)} %orighash);
2782:
2783: This is a helper function for get_current_state.
2784:
2785: =item C<&init_dbs()>
2786:
2787: Input: course id
2788:
2789: Output: 0 on success, positive integer on error
2790:
2791: This routine issues the calls to lonmysql to create the tables used to
2792: store student data.
2793:
2794: item C<&delete_caches()>
2795:
2796: This routine drops all the tables associated with a course from the
2797: MySQL database.
2798:
2799: Input: course id (optional, determined by environment if omitted)
2800:
2801: Returns: nothing
2802:
2803: =item C<&get_part_id()>
2804:
2805: Get the MySQL id of a problem part string.
2806:
2807: Input: $part
2808:
2809: Output: undef on error, integer $part_id on success.
2810:
2811: =item C<&get_part()>
2812:
2813: Get the string describing a part from the MySQL id of the problem part.
2814:
2815: Input: $part_id
2816:
2817: Output: undef on error, $part string on success.
2818:
2819: =item C<&get_symb_id()>
2820:
2821: Get the MySQL id of a symb.
2822:
2823: Input: $symb
2824:
2825: Output: undef on error, integer $symb_id on success.
2826:
2827: =item C<&get_symb()>
2828:
2829: Get the symb associated with a MySQL symb_id.
2830:
2831: Input: $symb_id
2832:
2833: Output: undef on error, $symb on success.
2834:
2835: =item C<&get_student_id()>
2836:
2837: Get the MySQL id of a student.
2838:
2839: Input: $sname, $dom
2840:
2841: Output: undef on error, integer $student_id on success.
2842:
2843: =item C<&get_student()>
2844:
2845: Get student username:domain associated with the MySQL student_id.
2846:
2847: Input: $student_id
2848:
2849: Output: undef on error, string $student (username:domain) on success.
2850:
2851: =item C<&clear_internal_caches()>
2852:
2853: Causes the internal caches used in get_student_id, get_student,
2854: get_symb_id, get_symb, get_part_id, and get_part to be undef'd.
2855:
2856: Needs to be called before the first operation with the MySQL database
2857: for a given Apache request.
2858:
2859: =item C<&update_full_student_data($sname,$sdom,$courseid)>
2860:
2861: Does a lonnet::dump on a student to populate the courses tables.
2862:
2863: Input: $sname, $sdom, $courseid
2864:
2865: Output: $returnstatus
2866:
2867: $returnstatus is a string describing any errors that occurred. 'okay' is the
2868: default.
2869:
2870: This subroutine loads a students data using lonnet::dump and inserts
2871: it into the MySQL database. The inserts are done on three tables,
2872: $fulldump_response_table, $fulldump_part_table, and $fulldump_timestamp_table.
2873: The INSERT calls are made directly by this subroutine, not through lonmysql
2874: because we do a 'bulk'insert which takes advantage of MySQLs non-SQL
2875: compliant INSERT command to insert multiple rows at a time.
2876: If anything has gone wrong during this process, $returnstatus is updated with
2877: a description of the error.
2878:
2879: Once the "fulldump" tables are updated, the tables used for chart and
2880: spreadsheet (which hold only the current state of the student on their
2881: homework, not historical data) are updated. If all updates have occurred
2882: successfully, $student_table is updated to reflect the time of the update.
2883:
2884: Notice we do not insert the data and immediately query it. This means it
2885: is possible for there to be data returned this first time that is not
2886: available the second time. CYA.
2887:
2888:
2889: =item C<&update_student_data()>
2890:
2891: Input: $sname, $sdom, $courseid
2892:
2893: Output: $returnstatus, \%student_data
2894:
2895: $returnstatus is a string describing any errors that occurred. 'okay' is the
2896: default.
2897: \%student_data is the data returned by a call to lonnet::currentdump.
2898:
2899: This subroutine loads a students data using lonnet::currentdump and inserts
2900: it into the MySQL database. The inserts are done on two tables,
2901: $performance_table and $parameters_table. $parameters_table holds the data
2902: that is not included in $performance_table. See the description of
2903: $performance_table elsewhere in this file. The INSERT calls are made
2904: directly by this subroutine, not through lonmysql because we do a 'bulk'
2905: insert which takes advantage of MySQLs non-SQL compliant INSERT command to
2906: insert multiple rows at a time. If anything has gone wrong during this
2907: process, $returnstatus is updated with a description of the error and
2908: \%student_data is returned.
2909:
2910: Notice we do not insert the data and immediately query it. This means it
2911: is possible for there to be data returned this first time that is not
2912: available the second time. CYA.
2913:
2914: =item &ensure_tables_are_set_up($courseid)
2915:
2916: Checks to be sure the MySQL tables for the given class are set up.
2917: If $courseid is omitted it will be obtained from the environment.
2918:
2919: Returns nothing on success and 'error' on failure
2920:
2921:
2922: =item C<&ensure_current_data()>
2923:
2924: Input: $sname, $sdom, $courseid
2925:
2926: Output: $status, $data
2927:
2928: This routine ensures the data for a given student is up to date.
2929: The $student_table is queried to determine the time of the last update.
2930: If the students data is out of date, &update_student_data() is called.
2931: The return values from the call to &update_student_data() are returned.
2932:
2933: =item C<&ensure_current_full_data($sname,$sdom,$courseid)>
2934:
2935: Input: $sname, $sdom, $courseid
2936:
2937: Output: $status
2938:
2939: This routine ensures the fulldata (the data from a lonnet::dump, not a
2940: lonnet::currentdump) for a given student is up to date.
2941: The $student_table is queried to determine the time of the last update.
2942: If the students fulldata is out of date, &update_full_student_data() is
2943: called.
2944:
2945: The return value from the call to &update_full_student_data() is returned.
2946:
2947: =item C<&get_student_data_from_performance_cache()>
2948:
2949: Input: $sname, $sdom, $symb, $courseid
2950:
2951: Output: hash reference containing the data for the given student.
2952: If $symb is undef, all the students data is returned.
2953:
2954: This routine is the heart of the local caching system. See the description
2955: of $performance_table, $symb_table, $student_table, and $part_table. The
2956: main task is building the MySQL request. The tables appear in the request
2957: in the order in which they should be parsed by MySQL. When searching
2958: on a student the $student_table is used to locate the 'student_id'. All
2959: rows in $performance_table which have a matching 'student_id' are returned,
2960: with data from $part_table and $symb_table which match the entries in
2961: $performance_table, 'part_id' and 'symb_id'. When searching on a symb,
2962: the $symb_table is processed first, with matching rows grabbed from
2963: $performance_table and filled in from $part_table and $student_table in
2964: that order.
2965:
2966: Running 'EXPLAIN ' on the 'SELECT' statements generated can be quite
2967: interesting, especially if you play with the order the tables are listed.
2968:
2969:
2970: =item C<&get_current_state()>
2971:
2972: Input: $sname,$sdom,$symb,$courseid
2973:
2974: Output: Described below
2975:
2976: Retrieve the current status of a students performance. $sname and
2977: $sdom are the only required parameters. If $symb is undef the results
2978: of an &Apache::lonnet::currentdump() will be returned.
2979: If $courseid is undef it will be retrieved from the environment.
2980:
2981: The return structure is based on &Apache::lonnet::currentdump. If
2982: $symb is unspecified, all the students data is returned in a hash of
2983: the form:
2984: (
2985: symb1 => { param1 => value1, param2 => value2 ... },
2986: symb2 => { param1 => value1, param2 => value2 ... },
2987: )
2988:
2989: If $symb is specified, a hash of
2990: (
2991: param1 => value1,
2992: param2 => value2,
2993: )
2994: is returned.
2995:
2996: If no data is found for $symb, or if the student has no performance data,
2997: an empty list is returned.
2998:
2999: =item C<&get_problem_statistics()>
3000:
3001: Gather data on a given problem. The database is assumed to be
3002: populated and all local caching variables are assumed to be set
3003: properly. This means you need to call &ensure_current_data for
3004: the students you are concerned with prior to calling this routine.
3005:
3006: Inputs: $Sections, Groups, $status, $symb, $part, $courseid, $starttime,
3007: $endtime
3008:
3009: =over 4
3010:
3011: =item $Sections Array ref containing section names for students.
3012: 'all' is allowed to be the first (and only) item in the array.
3013:
3014: =item $Groups Array ref containing group names for students.
3015: 'all' is allowed to be the first (and only) item in the array.
3016:
3017: =item $status String describing the status of students
3018:
3019: =item $symb is the symb for the problem.
3020:
3021: =item $part is the part id you need statistics for
3022:
3023: =item $courseid is the course id, of course!
3024:
3025: =item $starttime and $endtime are unix times which to use to limit
3026: the statistical data.
3027:
3028: =back
3029:
3030: Outputs: See the code for up to date information. A hash reference is
3031: returned. The hash has the following keys defined:
3032:
3033: =over 4
3034:
3035: =item * num_students
3036:
3037: The number of students attempting the problem
3038:
3039: =item tries
3040:
3041: The total number of tries for the students
3042:
3043: =item max_tries
3044:
3045: The maximum number of tries taken
3046:
3047: =item mean_tries
3048:
3049: The average number of tries
3050:
3051: =item num_solved T
3052:
3053: he number of students able to solve the problem
3054:
3055: =item num_override
3056:
3057: The number of students whose answer is 'correct_by_override'
3058:
3059: =item deg_of_diff
3060:
3061: The degree of difficulty of the problem
3062:
3063: =item std_tries
3064:
3065: The standard deviation of the number of tries
3066:
3067: =item skew_tries
3068:
3069: The skew of the number of tries
3070:
3071: =item per_wrong
3072:
3073: The number of students attempting the problem who were not
3074: able to answer it correctly.
3075:
3076: =back
3077:
3078: =item C<&populate_weight_table()>
3079:
3080: =item C<&limit_by_start_end_times()>
3081:
3082: Build SQL WHERE condition which limits the data collected by the start
3083: and end times provided
3084:
3085: Inputs: $starttime, $endtime, $table
3086:
3087: Returns: $time_limits
3088:
3089:
1.197 ! raeburn 3090: =item C<&limit_by_section_and_status()C>
1.190 jms 3091:
3092: Build SQL WHERE condition which limits the data collected by section and
3093: student status.
3094:
3095: Inputs: $Sections (array ref)
3096: $enrollment (string: 'any', 'expired', 'active')
3097: $tablename The name of the table that holds the student data
3098:
3099: Returns: $student_requirements,$enrollment_requirements
3100:
3101: =item C<&limit_by_group()>
3102:
3103: Build SQL LEFT JOIN statement to include students_groups and groupnames tables and SQL WHERE condition which limits the data collected by group.
3104:
3105: Inputs: $Groups (array ref)
3106: $stutable The name of the table which holds the student data.
3107: $grptable The name of the table which maps group_id to groupname.
3108: $stugrptab The name of the table which holds student group affiliations.
3109: Returns: $groups_join,$group_limits
3110: $groups_join JOIN part of SQL statement (to include group related tables)
3111: $group_limits SQL WHERE condition limiting to requested groups
3112:
3113: =item C<rank_students_by_scores_on_resources()>
3114:
3115: Inputs:
3116: $resources: array ref of hash ref. Each hash ref needs key 'symb'.
3117: $Sections: array ref of sections to include,
3118: $Groups: array ref of groups to include.
3119: $enrollment: string,
3120: $courseid (may be omitted)
3121: $starttime (may be omitted)
3122: $endtime (may be omitted)
3123: $has_award_for (may be omitted)
3124:
3125: Returns; An array of arrays. The sub arrays contain a student name and
3126: their score on the resources. $starttime and $endtime constrain the
3127: list to awards obtained during the given time limits. $has_score_on
3128: constrains the list to those students who at least attempted the
3129: resource identified by the given symb, which is used to filter out
3130: such students for statistics that would be adversely affected by such
3131: students.
3132:
3133: =item C<&get_sum_of_scores>
3134:
3135: Inputs: $resource (hash ref, needs {'symb'} key),
3136: $part, (the part id),
3137: $students (array ref, contents of array are scalars holding 'sname:sdom'),
3138: $courseid
3139:
3140: Returns: the sum of the score on the problem part over the students and the
3141: maximum possible value for the sum (taken from the weight table).
3142:
3143:
3144: =item C<&score_stats()>
3145:
3146: Inputs: $Sections, $enrollment, $symbs, $starttime,
3147: $endtime, $courseid
3148:
3149: $Sections, $enrollment, $starttime, $endtime, and $courseid are the same as
3150: elsewhere in this module.
3151: $symbs is an array ref of symbs
3152:
3153: Returns: minimum, maximum, mean, s.d., number of students, and maximum
3154: possible of student scores on the given resources
3155:
3156: =item C<&count_stats()>
3157:
3158: Inputs: $Sections, $Groups, $enrollment, $symbs, $starttime,
3159: $endtime, $courseid
3160:
3161: $Sections, $Groups $enrollment, $starttime, $endtime, and $courseid are the
3162: same as elsewhere in this module.
3163: $symbs is an array ref of symbs
3164:
3165: Returns: minimum, maximum, mean, s.d., and number of students
3166: of the number of items correct on the given resources
3167:
3168: =item C<get_student_data()>
3169:
3170: =item C<&get_student_scores($Sections,$Groups,$Symbs,$enrollment,$courseid)>
3171:
3172: =item C<&setup_table_names()>
3173:
3174: input: course id
3175:
3176: output: none
3177:
3178: =back
3179:
3180: =head3 End of Local Data Caching Subroutines
3181:
3182: =head3 Classlist Subroutines
3183:
3184: =over
3185:
3186: =item &get_classlist();
3187:
3188: Retrieve the classist of a given class or of the current class. Student
3189: information is returned from the classlist.db file and, if needed,
3190: from the students environment.
3191:
3192: Optional arguments are $cdom, and $cnum (course domain,
3193: and course number, respectively). If either is ommitted the course
3194: will be taken from the current environment ($env{'request.course.id'},
3195: $env{'course.'.$cid.'.domain'}, and $env{'course.'.$cid.'.num'}).
3196:
3197: Returns a reference to a hash which contains:
3198: keys '$sname:$sdom'
1.194 raeburn 3199: values [$sdom,$sname,$end,$start,$id,$section,$fullname,$status,$type,
3200: $lockedtype,$credits]
1.190 jms 3201:
3202: The constant values CL_SDOM, CL_SNAME, CL_END, etc. can be used
3203: as indices into the returned list to future-proof clients against
3204: changes in the list order.
3205:
3206: =back
3207:
3208: =cut
3209:
3210:
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