1: # The LearningOnline Network with CAPA
2: # (Publication Handler
3: #
4: # $Id: loncoursedata.pm,v 1.29 2002/09/03 02:22:40 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###
29:
30: =pod
31:
32: =head1 NAME
33:
34: loncoursedata
35:
36: =head1 SYNOPSIS
37:
38: Set of functions that download and process student and course information.
39:
40: =head1 PACKAGES USED
41:
42: Apache::Constants qw(:common :http)
43: Apache::lonnet()
44: Apache::lonhtmlcommon
45: HTML::TokeParser
46: GDBM_File
47:
48: =cut
49:
50: package Apache::loncoursedata;
51:
52: use strict;
53: use Apache::Constants qw(:common :http);
54: use Apache::lonnet();
55: use Apache::lonhtmlcommon;
56: use HTML::TokeParser;
57: use GDBM_File;
58:
59: =pod
60:
61: =head1 DOWNLOAD INFORMATION
62:
63: This section contains all the functions that get data from other servers
64: and/or itself.
65:
66: =cut
67:
68: # ----- DOWNLOAD INFORMATION -------------------------------------------
69:
70: =pod
71:
72: =item &DownloadClasslist()
73:
74: Collects lastname, generation, middlename, firstname, PID, and section for each
75: student from their environment database. The section data is also download, though
76: it is in a rough format, and is processed later. The list of students is built from
77: collecting a classlist for the course that is to be displayed. Once the classlist
78: has been downloaded, its date stamp is recorded. Unless the datestamp for the
79: class database is reset or is modified, this data will not be downloaded again.
80: Also, there was talk about putting the fullname and section
81: and perhaps other pieces of data into the classlist file. This would
82: reduce the number of different file accesses and reduce the amount of
83: processing on this side.
84:
85: =over 4
86:
87: Input: $courseID, $lastDownloadTime, $c
88:
89: $courseID: The id of the course
90:
91: $lastDownloadTime: This is the date stamp for when this information was
92: last gathered. If it is set to Not downloaded, it will gather the data
93: again, though it currently does not remove the old data.
94:
95: $c: The connection class that can determine if the browser has aborted. It
96: is used to short circuit this function so that it does not continue to
97: get information when there is no need.
98:
99: Output: \%classlist
100:
101: \%classlist: A pointer to a hash containing the following data:
102:
103: -A list of student name:domain (as keys) (known below as $name)
104:
105: -A hash pointer for each student containing lastname, generation, firstname,
106: middlename, and PID : Key is $name.studentInformation
107:
108: -A hash pointer to each students section data : Key is $name.section
109:
110: -If there was an error in dump, it will be returned in the hash. See
111: the error codes for dump in lonnet. Also, an error key will be
112: generated if an abort occurs.
113:
114: =back
115:
116: =cut
117:
118: sub DownloadClasslist {
119: my ($courseID, $lastDownloadTime, $c)=@_;
120: my ($courseDomain,$courseNumber)=split(/\_/,$courseID);
121: my %classlist;
122:
123: my $modifiedTime = &Apache::lonnet::GetFileTimestamp($courseDomain, $courseNumber,
124: 'classlist.db',
125: $Apache::lonnet::perlvar{'lonUsersDir'});
126:
127: # Always download the information if lastDownloadTime is set to
128: # Not downloaded, otherwise it is only downloaded if the file
129: # has been updated and has a more recent date stamp
130: if($lastDownloadTime ne 'Not downloaded' &&
131: $lastDownloadTime >= $modifiedTime && $modifiedTime >= 0) {
132: # Data is not gathered so return UpToDate as true. This
133: # will be interpreted in ProcessClasslist
134: $classlist{'lastDownloadTime'}=time;
135: $classlist{'UpToDate'} = 'true';
136: return \%classlist;
137: }
138:
139: %classlist=&Apache::lonnet::dump('classlist',$courseDomain, $courseNumber);
140: foreach(keys (%classlist)) {
141: if(/^(con_lost|error|no_such_host)/i) {
142: return \%classlist;
143: }
144: }
145:
146: foreach my $name (keys(%classlist)) {
147: if(defined($c) && ($c->aborted())) {
148: $classlist{'error'}='aborted';
149: return \%classlist;
150: }
151:
152: my ($studentName,$studentDomain) = split(/\:/,$name);
153: # Download student environment data, specifically the full name and id.
154: my %studentInformation=&Apache::lonnet::get('environment',
155: ['lastname','generation',
156: 'firstname','middlename',
157: 'id'],
158: $studentDomain,
159: $studentName);
160: $classlist{$name.':studentInformation'}=\%studentInformation;
161:
162: if($c->aborted()) {
163: $classlist{'error'}='aborted';
164: return \%classlist;
165: }
166:
167: #Section
168: my %section=&Apache::lonnet::dump('roles',$studentDomain,$studentName);
169: $classlist{$name.':sections'}=\%section;
170: }
171:
172: $classlist{'UpToDate'} = 'false';
173: $classlist{'lastDownloadTime'}=time;
174:
175: return \%classlist;
176: }
177:
178: =pod
179:
180: =item &DownloadCourseInformation()
181:
182: Dump of all the course information for a single student. The data can be
183: pruned by making use of dumps regular expression arguement. This function
184: also takes a regular expression which it passes straight through to dump.
185: The data is no escaped, because it is done elsewhere. It also
186: checks the timestamp of the students course database file and only downloads
187: if it has been modified since the last download.
188:
189: =over 4
190:
191: Input: $namedata, $courseID, $lastDownloadTime, $WhatIWant
192:
193: $namedata: student name:domain
194:
195: $courseID: The id of the course
196:
197: $lastDownloadTime: This is the date stamp for when this information was
198: last gathered. If it is set to Not downloaded, it will gather the data
199: again, though it currently does not remove the old data.
200:
201: $WhatIWant: Regular expression used to get selected data with dump
202:
203: Output: \%courseData
204:
205: \%courseData: A hash pointer to the raw data from the students course
206: database.
207:
208: =back
209:
210: =cut
211:
212: sub DownloadCourseInformation {
213: my ($namedata,$courseID,$lastDownloadTime,$WhatIWant)=@_;
214: my %courseData;
215: my ($name,$domain) = split(/\:/,$namedata);
216:
217: my $modifiedTime = &Apache::lonnet::GetFileTimestamp($domain, $name,
218: $courseID.'.db',
219: $Apache::lonnet::perlvar{'lonUsersDir'});
220:
221: if($lastDownloadTime >= $modifiedTime && $modifiedTime >= 0) {
222: # Data is not gathered so return UpToDate as true. This
223: # will be interpreted in ProcessClasslist
224: $courseData{$namedata.':lastDownloadTime'}=time;
225: $courseData{$namedata.':UpToDate'} = 'true';
226: return \%courseData;
227: }
228:
229: # Download course data
230: if(!defined($WhatIWant)) {
231: # set the regular expression to everything by setting it to period
232: $WhatIWant = '.';
233: }
234: %courseData=&Apache::lonnet::dump($courseID, $domain, $name, $WhatIWant);
235: $courseData{'UpToDate'} = 'false';
236: $courseData{'lastDownloadTime'}=time;
237:
238: my %newData;
239: foreach (keys(%courseData)) {
240: # need to have the keys to be prepended with the name:domain of the
241: # student to reduce data collision later.
242: $newData{$namedata.':'.$_} = $courseData{$_};
243: }
244:
245: return \%newData;
246: }
247:
248: # ----- END DOWNLOAD INFORMATION ---------------------------------------
249:
250: =pod
251:
252: =head1 PROCESSING FUNCTIONS
253:
254: These functions process all the data for all the students. Also, they
255: are the functions that access the cache database for writing the majority of
256: the time. The downloading and caching were separated to reduce problems
257: with stopping downloading then can not tie hash to database later.
258:
259: =cut
260:
261: # ----- PROCESSING FUNCTIONS ---------------------------------------
262:
263: =pod
264:
265: =item &ProcessTopResourceMap()
266:
267: Trace through the "big hash" created in rat/lonuserstate.pm::loadmap.
268: Basically, this function organizes a subset of the data and stores it in
269: cached data. The data stored is the problems, sequences, sequence titles,
270: parts of problems, and their ordering. Column width information is also
271: partially handled here on a per sequence basis.
272:
273: =over 4
274:
275: Input: $cache, $c
276:
277: $cache: A pointer to a hash to store the information
278:
279: $c: The connection class used to determine if an abort has been sent to the
280: browser
281:
282: Output: A string that contains an error message or "OK" if everything went
283: smoothly.
284:
285: =back
286:
287: =cut
288:
289: sub ProcessTopResourceMap {
290: my ($cache,$c)=@_;
291: my %hash;
292: my $fn=$ENV{'request.course.fn'};
293: if(-e "$fn.db") {
294: my $tieTries=0;
295: while($tieTries < 3) {
296: if($c->aborted()) {
297: return;
298: }
299: if(tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER(),0640)) {
300: last;
301: }
302: $tieTries++;
303: sleep 1;
304: }
305: if($tieTries >= 3) {
306: return 'Coursemap undefined.';
307: }
308: } else {
309: return 'Can not open Coursemap.';
310: }
311:
312: my $oldkeys;
313: if(defined($cache->{'ResourceKeys'})) {
314: $oldkeys = $cache->{'ResourceKeys'};
315: foreach (split(':::', $cache->{'ResourceKeys'})) {
316: delete $cache->{$_};
317: }
318: delete $cache->{'ResourceKeys'};
319: }
320:
321: # Initialize state machine. Set information pointing to top level map.
322: my (@sequences, @currentResource, @finishResource);
323: my ($currentSequence, $currentResourceID, $lastResourceID);
324:
325: $currentResourceID=$hash{'ids_/res/'.$ENV{'request.course.uri'}};
326: push(@currentResource, $currentResourceID);
327: $lastResourceID=-1;
328: $currentSequence=-1;
329: my $topLevelSequenceNumber = $currentSequence;
330:
331: my %sequenceRecord;
332: my %allkeys;
333: while(1) {
334: if($c->aborted()) {
335: last;
336: }
337: # HANDLE NEW SEQUENCE!
338: #if page || sequence
339: if(defined($hash{'map_pc_'.$hash{'src_'.$currentResourceID}}) &&
340: !defined($sequenceRecord{$currentResourceID})) {
341: $sequenceRecord{$currentResourceID}++;
342: push(@sequences, $currentSequence);
343: push(@currentResource, $currentResourceID);
344: push(@finishResource, $lastResourceID);
345:
346: $currentSequence=$hash{'map_pc_'.$hash{'src_'.$currentResourceID}};
347:
348: # Mark sequence as containing problems. If it doesn't, then
349: # it will be removed when processing for this sequence is
350: # complete. This allows the problems in a sequence
351: # to be outputed before problems in the subsequences
352: if(!defined($cache->{'orderedSequences'})) {
353: $cache->{'orderedSequences'}=$currentSequence;
354: } else {
355: $cache->{'orderedSequences'}.=':'.$currentSequence;
356: }
357: $allkeys{'orderedSequences'}++;
358:
359: $lastResourceID=$hash{'map_finish_'.
360: $hash{'src_'.$currentResourceID}};
361: $currentResourceID=$hash{'map_start_'.
362: $hash{'src_'.$currentResourceID}};
363:
364: if(!($currentResourceID) || !($lastResourceID)) {
365: $currentSequence=pop(@sequences);
366: $currentResourceID=pop(@currentResource);
367: $lastResourceID=pop(@finishResource);
368: if($currentSequence eq $topLevelSequenceNumber) {
369: last;
370: }
371: }
372: next;
373: }
374:
375: # Handle gradable resources: exams, problems, etc
376: $currentResourceID=~/(\d+)\.(\d+)/;
377: my $partA=$1;
378: my $partB=$2;
379: if($hash{'src_'.$currentResourceID}=~
380: /\.(problem|exam|quiz|assess|survey|form)$/ &&
381: $partA eq $currentSequence &&
382: !defined($sequenceRecord{$currentSequence.':'.
383: $currentResourceID})) {
384: $sequenceRecord{$currentSequence.':'.$currentResourceID}++;
385: my $Problem = &Apache::lonnet::symbclean(
386: &Apache::lonnet::declutter($hash{'map_id_'.$partA}).
387: '___'.$partB.'___'.
388: &Apache::lonnet::declutter($hash{'src_'.
389: $currentResourceID}));
390:
391: $cache->{$currentResourceID.':problem'}=$Problem;
392: $allkeys{$currentResourceID.':problem'}++;
393: if(!defined($cache->{$currentSequence.':problems'})) {
394: $cache->{$currentSequence.':problems'}=$currentResourceID;
395: } else {
396: $cache->{$currentSequence.':problems'}.=
397: ':'.$currentResourceID;
398: }
399: $allkeys{$currentSequence.':problems'}++;
400:
401: my $meta=$hash{'src_'.$currentResourceID};
402: # $cache->{$currentResourceID.':title'}=
403: # &Apache::lonnet::metdata($meta,'title');
404: $cache->{$currentResourceID.':title'}=
405: $hash{'title_'.$currentResourceID};
406: $allkeys{$currentResourceID.':title'}++;
407: $cache->{$currentResourceID.':source'}=
408: $hash{'src_'.$currentResourceID};
409: $allkeys{$currentResourceID.':source'}++;
410:
411: # Get Parts for problem
412: my %beenHere;
413: foreach (split(/\,/,&Apache::lonnet::metadata($meta,'packages'))) {
414: if(/^\w+response_\d+.*/) {
415: my (undef, $partId, $responseId) = split(/_/,$_);
416: if($beenHere{'p:'.$partId} == 0) {
417: $beenHere{'p:'.$partId}++;
418: if(!defined($cache->{$currentSequence.':'.
419: $currentResourceID.':parts'})) {
420: $cache->{$currentSequence.':'.$currentResourceID.
421: ':parts'}=$partId;
422: } else {
423: $cache->{$currentSequence.':'.$currentResourceID.
424: ':parts'}.=':'.$partId;
425: }
426: $allkeys{$currentSequence.':'.$currentResourceID.
427: ':parts'}++;
428: }
429: if($beenHere{'r:'.$partId.':'.$responseId} == 0) {
430: $beenHere{'r:'.$partId.':'.$responseId}++;
431: if(!defined($cache->{$currentSequence.':'.
432: $currentResourceID.':'.$partId.
433: ':responseIDs'})) {
434: $cache->{$currentSequence.':'.$currentResourceID.
435: ':'.$partId.':responseIDs'}=$responseId;
436: } else {
437: $cache->{$currentSequence.':'.$currentResourceID.
438: ':'.$partId.':responseIDs'}.=':'.
439: $responseId;
440: }
441: $allkeys{$currentSequence.':'.$currentResourceID.':'.
442: $partId.':responseIDs'}++;
443: }
444: if(/^optionresponse/ &&
445: $beenHere{'o:'.$partId.':'.$currentResourceID} == 0) {
446: $beenHere{'o:'.$partId.$currentResourceID}++;
447: if(defined($cache->{'OptionResponses'})) {
448: $cache->{'OptionResponses'}.= ':::'.
449: $currentSequence.':'.$currentResourceID.':'.
450: $partId.':'.$responseId;
451: } else {
452: $cache->{'OptionResponses'}= $currentSequence.':'.
453: $currentResourceID.':'.
454: $partId.':'.$responseId;
455: }
456: $allkeys{'OptionResponses'}++;
457: }
458: }
459: }
460: }
461:
462: # if resource == finish resource, then it is the end of a sequence/page
463: if($currentResourceID eq $lastResourceID) {
464: # pop off last resource of sequence
465: $currentResourceID=pop(@currentResource);
466: $lastResourceID=pop(@finishResource);
467:
468: if(defined($cache->{$currentSequence.':problems'})) {
469: # Capture sequence information here
470: $cache->{$currentSequence.':title'}=
471: $hash{'title_'.$currentResourceID};
472: $allkeys{$currentSequence.':title'}++;
473: $cache->{$currentSequence.':source'}=
474: $hash{'src_'.$currentResourceID};
475: $allkeys{$currentSequence.':source'}++;
476:
477: my $totalProblems=0;
478: foreach my $currentProblem (split(/\:/,
479: $cache->{$currentSequence.
480: ':problems'})) {
481: foreach (split(/\:/,$cache->{$currentSequence.':'.
482: $currentProblem.
483: ':parts'})) {
484: $totalProblems++;
485: }
486: }
487: my @titleLength=split(//,$cache->{$currentSequence.
488: ':title'});
489: # $extra is 3 for problems correct and 3 for space
490: # between problems correct and problem output
491: my $extra = 6;
492: if(($totalProblems + $extra) > (scalar @titleLength)) {
493: $cache->{$currentSequence.':columnWidth'}=
494: $totalProblems + $extra;
495: } else {
496: $cache->{$currentSequence.':columnWidth'}=
497: (scalar @titleLength);
498: }
499: $allkeys{$currentSequence.':columnWidth'}++;
500: } else {
501: # Remove sequence from list, if it contains no problems to
502: # display.
503: $cache->{'orderedSequences'}=~s/$currentSequence//;
504: $cache->{'orderedSequences'}=~s/::/:/g;
505: $cache->{'orderedSequences'}=~s/^:|:$//g;
506: }
507:
508: $currentSequence=pop(@sequences);
509: if($currentSequence eq $topLevelSequenceNumber) {
510: last;
511: }
512: }
513:
514: # MOVE!!!
515: # move to next resource
516: unless(defined($hash{'to_'.$currentResourceID})) {
517: # big problem, need to handle. Next is probably wrong
518: my $errorMessage = 'Big problem in ';
519: $errorMessage .= 'loncoursedata::ProcessTopLevelMap.';
520: $errorMessage .= ' bighash to_$currentResourceID not defined!';
521: &Apache::lonnet::logthis($errorMessage);
522: last;
523: }
524: my @nextResources=();
525: foreach (split(/\,/,$hash{'to_'.$currentResourceID})) {
526: if(!defined($sequenceRecord{$currentSequence.':'.
527: $hash{'goesto_'.$_}})) {
528: push(@nextResources, $hash{'goesto_'.$_});
529: }
530: }
531: push(@currentResource, @nextResources);
532: # Set the next resource to be processed
533: $currentResourceID=pop(@currentResource);
534: }
535:
536: my @theKeys = keys(%allkeys);
537: my $newkeys = join(':::', @theKeys);
538: $cache->{'ResourceKeys'} = join(':::', $newkeys);
539: if($newkeys ne $oldkeys) {
540: $cache->{'ResourceUpdated'} = 'true';
541: } else {
542: $cache->{'ResourceUpdated'} = 'false';
543: }
544:
545: unless (untie(%hash)) {
546: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
547: "Could not untie coursemap $fn (browse)".
548: ".</font>");
549: }
550:
551: return 'OK';
552: }
553:
554: =pod
555:
556: =item &ProcessClasslist()
557:
558: Taking the class list dumped from &DownloadClasslist(), all the
559: students and their non-class information is processed using the
560: &ProcessStudentInformation() function. A date stamp is also recorded for
561: when the data was processed.
562:
563: Takes data downloaded for a student and breaks it up into managable pieces and
564: stored in cache data. The username, domain, class related date, PID,
565: full name, and section are all processed here.
566:
567: =over 4
568:
569: Input: $cache, $classlist, $courseID, $ChartDB, $c
570:
571: $cache: A hash pointer to store the data
572:
573: $classlist: The hash of data collected about a student from
574: &DownloadClasslist(). The hash contains a list of students, a pointer
575: to a hash of student information for each student, and each students section
576: number.
577:
578: $courseID: The course ID
579:
580: $ChartDB: The name of the cache database file.
581:
582: $c: The connection class used to determine if an abort has been sent to the
583: browser
584:
585: Output: @names
586:
587: @names: An array of students whose information has been processed, and are to
588: be considered in an arbitrary order.
589:
590: =back
591:
592: =cut
593:
594: sub ProcessClasslist {
595: my ($cache,$classlist,$courseID,$c)=@_;
596: my @names=();
597:
598: $cache->{'ClasslistTimeStamp'}=$classlist->{'lastDownloadTime'};
599: if($classlist->{'UpToDate'} eq 'true') {
600: return split(/:::/,$cache->{'NamesOfStudents'});;
601: }
602:
603: foreach my $name (keys(%$classlist)) {
604: if($name =~ /\:section/ || $name =~ /\:studentInformation/ ||
605: $name eq '' || $name eq 'UpToDate' || $name eq 'lastDownloadTime') {
606: next;
607: }
608: if($c->aborted()) {
609: return ();
610: }
611: my $studentInformation = $classlist->{$name.':studentInformation'},
612: my $sectionData = $classlist->{$name.':sections'},
613: my $date = $classlist->{$name},
614: my ($studentName,$studentDomain) = split(/\:/,$name);
615:
616: $cache->{$name.':username'}=$studentName;
617: $cache->{$name.':domain'}=$studentDomain;
618: # Initialize timestamp for student
619: if(!defined($cache->{$name.':lastDownloadTime'})) {
620: $cache->{$name.':lastDownloadTime'}='Not downloaded';
621: $cache->{$name.':updateTime'}=' Not updated';
622: }
623:
624: my $error = 0;
625: foreach(keys(%$studentInformation)) {
626: if(/^(con_lost|error|no_such_host)/i) {
627: $cache->{$name.':error'}=
628: 'Could not download student environment data.';
629: $cache->{$name.':fullname'}='';
630: $cache->{$name.':id'}='';
631: $error = 1;
632: }
633: }
634: next if($error);
635: push(@names,$name);
636: $cache->{$name.':fullname'}=&ProcessFullName(
637: $studentInformation->{'lastname'},
638: $studentInformation->{'generation'},
639: $studentInformation->{'firstname'},
640: $studentInformation->{'middlename'});
641: $cache->{$name.':id'}=$studentInformation->{'id'};
642:
643: my ($end, $start)=split(':',$date);
644: $courseID=~s/\_/\//g;
645: $courseID=~s/^(\w)/\/$1/;
646:
647: my $sec='';
648: foreach my $key (keys (%$sectionData)) {
649: my $value = $sectionData->{$key};
650: if ($key=~/^$courseID(?:\/)*(\w+)*\_st$/) {
651: my $tempsection=$1;
652: if($key eq $courseID.'_st') {
653: $tempsection='';
654: }
655: my ($dummy,$roleend,$rolestart)=split(/\_/,$value);
656: if($roleend eq $end && $rolestart eq $start) {
657: $sec = $tempsection;
658: last;
659: }
660: }
661: }
662:
663: my $status='Expired';
664: if(((!$end) || time < $end) && ((!$start) || (time > $start))) {
665: $status='Active';
666: }
667: $cache->{$name.':Status'}=$status;
668: $cache->{$name.':section'}=$sec;
669:
670: if($sec eq '' || !defined($sec) || $sec eq ' ') {
671: $sec = 'none';
672: }
673: if(defined($cache->{'sectionList'})) {
674: if($cache->{'sectionList'} !~ /(^$sec:|^$sec$|:$sec$|:$sec:)/) {
675: $cache->{'sectionList'} .= ':'.$sec;
676: }
677: } else {
678: $cache->{'sectionList'} = $sec;
679: }
680: }
681:
682: $cache->{'ClasslistTimestamp'}=time;
683: $cache->{'NamesOfStudents'}=join(':::',@names);
684:
685: return @names;
686: }
687:
688: =pod
689:
690: =item &ProcessStudentData()
691:
692: Takes the course data downloaded for a student in
693: &DownloadCourseInformation() and breaks it up into key value pairs
694: to be stored in the cached data. The keys are comprised of the
695: $username:$domain:$keyFromCourseDatabase. The student username:domain is
696: stored away signifying that the students information has been downloaded and
697: can be reused from cached data.
698:
699: =over 4
700:
701: Input: $cache, $courseData, $name
702:
703: $cache: A hash pointer to store data
704:
705: $courseData: A hash pointer that points to the course data downloaded for a
706: student.
707:
708: $name: username:domain
709:
710: Output: None
711:
712: *NOTE: There is no output, but an error message is stored away in the cache
713: data. This is checked in &FormatStudentData(). The key username:domain:error
714: will only exist if an error occured. The error is an error from
715: &DownloadCourseInformation().
716:
717: =back
718:
719: =cut
720:
721: sub ProcessStudentData {
722: my ($cache,$courseData,$name)=@_;
723:
724: if(!&CheckDateStampError($courseData, $cache, $name)) {
725: return;
726: }
727:
728: # This little delete thing, should not be here. Move some other
729: # time though.
730: if(defined($cache->{$name.':keys'})) {
731: foreach (split(':::', $cache->{$name.':keys'})) {
732: delete $cache->{$name.':'.$_};
733: }
734: delete $cache->{$name.':keys'};
735: }
736:
737: my %courseKeys;
738: # user name:domain was prepended earlier in DownloadCourseInformation
739: foreach (keys %$courseData) {
740: my $currentKey = $_;
741: $currentKey =~ s/^$name//;
742: $courseKeys{$currentKey}++;
743: $cache->{$_}=$courseData->{$_};
744: }
745:
746: $cache->{$name.':keys'} = join(':::', keys(%courseKeys));
747:
748: return;
749: }
750:
751: =pod
752:
753: =item &ExtractStudentData()
754:
755: HISTORY: This function originally existed in every statistics module,
756: and performed different tasks, the had some overlap. Due to the need
757: for the data from the different modules, they were combined into
758: a single function.
759:
760: This function now extracts all the necessary course data for a student
761: from what was downloaded from their homeserver. There is some extra
762: time overhead compared to the ProcessStudentInformation function, but
763: it would have had to occurred at some point anyways. This is now
764: typically called while downloading the data it will process. It is
765: the brother function to ProcessStudentInformation.
766:
767: =over 4
768:
769: Input: $input, $output, $data, $name
770:
771: $input: A hash that contains the input data to be processed
772:
773: $output: A hash to contain the processed data
774:
775: $data: A hash containing the information on what is to be
776: processed and how (basically).
777:
778: $name: username:domain
779:
780: The input is slightly different here, but is quite simple.
781: It is currently used where the $input, $output, and $data
782: can and are often the same hashes, but they do not need
783: to be.
784:
785: Output: None
786:
787: *NOTE: There is no output, but an error message is stored away in the cache
788: data. This is checked in &FormatStudentData(). The key username:domain:error
789: will only exist if an error occured. The error is an error from
790: &DownloadCourseInformation().
791:
792: =back
793:
794: =cut
795:
796: sub ExtractStudentData {
797: my ($input, $output, $data, $name)=@_;
798:
799: if(!&CheckDateStampError($input, $data, $name)) {
800: return;
801: }
802:
803: # This little delete thing, should not be here. Move some other
804: # time though.
805: my %allkeys;
806: if(defined($output->{$name.':keys'})) {
807: foreach (split(':::', $output->{$name.':keys'})) {
808: delete $output->{$name.':'.$_};
809: }
810: delete $output->{$name.':keys'};
811: }
812:
813: my ($username,$domain)=split(':',$name);
814:
815: my $Version;
816: my $problemsCorrect = 0;
817: my $totalProblems = 0;
818: my $problemsSolved = 0;
819: my $numberOfParts = 0;
820: my $totalAwarded = 0;
821: foreach my $sequence (split(':', $data->{'orderedSequences'})) {
822: foreach my $problemID (split(':', $data->{$sequence.':problems'})) {
823: my $problem = $data->{$problemID.':problem'};
824: my $LatestVersion = $input->{$name.':version:'.$problem};
825:
826: # Output dashes for all the parts of this problem if there
827: # is no version information about the current problem.
828: $output->{$name.':'.$problemID.':NoVersion'} = 'false';
829: $allkeys{$name.':'.$problemID.':NoVersion'}++;
830: if(!$LatestVersion) {
831: foreach my $part (split(/\:/,$data->{$sequence.':'.
832: $problemID.
833: ':parts'})) {
834: $output->{$name.':'.$problemID.':'.$part.':tries'} = 0;
835: $output->{$name.':'.$problemID.':'.$part.':awarded'} = 0;
836: $output->{$name.':'.$problemID.':'.$part.':code'} = ' ';
837: $allkeys{$name.':'.$problemID.':'.$part.':tries'}++;
838: $allkeys{$name.':'.$problemID.':'.$part.':awarded'}++;
839: $allkeys{$name.':'.$problemID.':'.$part.':code'}++;
840: $totalProblems++;
841: }
842: $output->{$name.':'.$problemID.':NoVersion'} = 'true';
843: next;
844: }
845:
846: my %partData=undef;
847: # Initialize part data, display skips correctly
848: # Skip refers to when a student made no submissions on that
849: # part/problem.
850: foreach my $part (split(/\:/,$data->{$sequence.':'.
851: $problemID.
852: ':parts'})) {
853: $partData{$part.':tries'}=0;
854: $partData{$part.':code'}=' ';
855: $partData{$part.':awarded'}=0;
856: $partData{$part.':timestamp'}=0;
857: foreach my $response (split(':', $data->{$sequence.':'.
858: $problemID.':'.
859: $part.':responseIDs'})) {
860: $partData{$part.':'.$response.':submission'}='';
861: }
862: }
863:
864: # Looping through all the versions of each part, starting with the
865: # oldest version. Basically, it gets the most recent
866: # set of grade data for each part.
867: my @submissions = ();
868: for(my $Version=1; $Version<=$LatestVersion; $Version++) {
869: foreach my $part (split(/\:/,$data->{$sequence.':'.
870: $problemID.
871: ':parts'})) {
872:
873: if(!defined($input->{"$name:$Version:$problem".
874: ":resource.$part.solved"})) {
875: # No grade for this submission, so skip
876: next;
877: }
878:
879: my $tries=0;
880: my $code=' ';
881: my $awarded=0;
882:
883: $tries = $input->{$name.':'.$Version.':'.$problem.
884: ':resource.'.$part.'.tries'};
885: $awarded = $input->{$name.':'.$Version.':'.$problem.
886: ':resource.'.$part.'.awarded'};
887:
888: $partData{$part.':awarded'}=($awarded) ? $awarded : 0;
889: $partData{$part.':tries'}=($tries) ? $tries : 0;
890:
891: $partData{$part.':timestamp'}=$input->{$name.':'.$Version.':'.
892: $problem.
893: ':timestamp'};
894: if(!$input->{$name.':'.$Version.':'.$problem.':resource.'.$part.
895: '.previous'}) {
896: foreach my $response (split(':',
897: $data->{$sequence.':'.
898: $problemID.':'.
899: $part.':responseIDs'})) {
900: @submissions=($input->{$name.':'.$Version.':'.
901: $problem.
902: ':resource.'.$part.'.'.
903: $response.'.submission'},
904: @submissions);
905: }
906: }
907:
908: my $val = $input->{$name.':'.$Version.':'.$problem.
909: ':resource.'.$part.'.solved'};
910: if ($val eq 'correct_by_student') {$code = '*';}
911: elsif ($val eq 'correct_by_override') {$code = '+';}
912: elsif ($val eq 'incorrect_attempted') {$code = '.';}
913: elsif ($val eq 'incorrect_by_override'){$code = '-';}
914: elsif ($val eq 'excused') {$code = 'x';}
915: elsif ($val eq 'ungraded_attempted') {$code = '#';}
916: else {$code = ' ';}
917: $partData{$part.':code'}=$code;
918: }
919: }
920:
921: foreach my $part (split(/\:/,$data->{$sequence.':'.$problemID.
922: ':parts'})) {
923: $output->{$name.':'.$problemID.':'.$part.':wrong'} =
924: $partData{$part.':tries'};
925: $allkeys{$name.':'.$problemID.':'.$part.':wrong'}++;
926:
927: if($partData{$part.':code'} eq '*') {
928: $output->{$name.':'.$problemID.':'.$part.':wrong'}--;
929: $problemsCorrect++;
930: } elsif($partData{$part.':code'} eq '+') {
931: $output->{$name.':'.$problemID.':'.$part.':wrong'}--;
932: $problemsCorrect++;
933: }
934:
935: $output->{$name.':'.$problemID.':'.$part.':tries'} =
936: $partData{$part.':tries'};
937: $output->{$name.':'.$problemID.':'.$part.':code'} =
938: $partData{$part.':code'};
939: $output->{$name.':'.$problemID.':'.$part.':awarded'} =
940: $partData{$part.':awarded'};
941: $allkeys{$name.':'.$problemID.':'.$part.':tries'}++;
942: $allkeys{$name.':'.$problemID.':'.$part.':code'}++;
943: $allkeys{$name.':'.$problemID.':'.$part.':awarded'}++;
944:
945: $totalAwarded += $partData{$part.':awarded'};
946: $output->{$name.':'.$problemID.':'.$part.':timestamp'} =
947: $partData{$part.':timestamp'};
948: $allkeys{$name.':'.$problemID.':'.$part.':timestamp'}++;
949:
950: foreach my $response (split(':', $data->{$sequence.':'.
951: $problemID.':'.
952: $part.':responseIDs'})) {
953: $output->{$name.':'.$problemID.':'.$part.':'.$response.
954: ':submission'}=join(':::',@submissions);
955: $allkeys{$name.':'.$problemID.':'.$part.':'.$response.
956: ':submission'}++;
957: }
958:
959: if($partData{$part.':code'} ne 'x') {
960: $totalProblems++;
961: }
962: }
963: }
964:
965: $output->{$name.':'.$sequence.':problemsCorrect'} = $problemsCorrect;
966: $allkeys{$name.':'.$sequence.':problemsCorrect'}++;
967: $problemsSolved += $problemsCorrect;
968: $problemsCorrect=0;
969: }
970:
971: $output->{$name.':problemsSolved'} = $problemsSolved;
972: $output->{$name.':totalProblems'} = $totalProblems;
973: $output->{$name.':totalAwarded'} = $totalAwarded;
974: $allkeys{$name.':problemsSolved'}++;
975: $allkeys{$name.':totalProblems'}++;
976: $allkeys{$name.':totalAwarded'}++;
977:
978: $output->{$name.':keys'} = join(':::', keys(%allkeys));
979:
980: return;
981: }
982:
983: sub LoadDiscussion {
984: my ($courseID)=@_;
985: my %Discuss=();
986: my %contrib=&Apache::lonnet::dump(
987: $courseID,
988: $ENV{'course.'.$courseID.'.domain'},
989: $ENV{'course.'.$courseID.'.num'});
990:
991: #my %contrib=&DownloadCourseInformation($name, $courseID, 0);
992:
993: foreach my $temp(keys %contrib) {
994: if ($temp=~/^version/) {
995: my $ver=$contrib{$temp};
996: my ($dummy,$prb)=split(':',$temp);
997: for (my $idx=1; $idx<=$ver; $idx++ ) {
998: my $name=$contrib{"$idx:$prb:sendername"};
999: $Discuss{"$name:$prb"}=$idx;
1000: }
1001: }
1002: }
1003:
1004: return \%Discuss;
1005: }
1006:
1007: # ----- END PROCESSING FUNCTIONS ---------------------------------------
1008:
1009: =pod
1010:
1011: =head1 HELPER FUNCTIONS
1012:
1013: These are just a couple of functions do various odd and end
1014: jobs. There was also a couple of bulk functions added. These are
1015: &DownloadStudentCourseData(), &DownloadStudentCourseDataSeparate(), and
1016: &CheckForResidualDownload(). These functions now act as the interface
1017: for downloading student course data. The statistical modules should
1018: no longer make the calls to dump and download and process etc. They
1019: make calls to these bulk functions to get their data.
1020:
1021: =cut
1022:
1023: # ----- HELPER FUNCTIONS -----------------------------------------------
1024:
1025: sub CheckDateStampError {
1026: my ($courseData, $cache, $name)=@_;
1027: if($courseData->{$name.':UpToDate'} eq 'true') {
1028: $cache->{$name.':lastDownloadTime'} =
1029: $courseData->{$name.':lastDownloadTime'};
1030: if($courseData->{$name.':lastDownloadTime'} eq 'Not downloaded') {
1031: $cache->{$name.':updateTime'} = ' Not updated';
1032: } else {
1033: $cache->{$name.':updateTime'}=
1034: localtime($courseData->{$name.':lastDownloadTime'});
1035: }
1036: return 0;
1037: }
1038:
1039: $cache->{$name.':lastDownloadTime'}=$courseData->{$name.':lastDownloadTime'};
1040: if($courseData->{$name.':lastDownloadTime'} eq 'Not downloaded') {
1041: $cache->{$name.':updateTime'} = ' Not updated';
1042: } else {
1043: $cache->{$name.':updateTime'}=
1044: localtime($courseData->{$name.':lastDownloadTime'});
1045: }
1046:
1047: if(defined($courseData->{$name.':error'})) {
1048: $cache->{$name.':error'}=$courseData->{$name.':error'};
1049: return 0;
1050: }
1051:
1052: return 1;
1053: }
1054:
1055: =pod
1056:
1057: =item &ProcessFullName()
1058:
1059: Takes lastname, generation, firstname, and middlename (or some partial
1060: set of this data) and returns the full name version as a string. Format
1061: is Lastname generation, firstname middlename or a subset of this.
1062:
1063: =cut
1064:
1065: sub ProcessFullName {
1066: my ($lastname, $generation, $firstname, $middlename)=@_;
1067: my $Str = '';
1068:
1069: if($lastname ne '') {
1070: $Str .= $lastname.' ';
1071: if($generation ne '') {
1072: $Str .= $generation;
1073: } else {
1074: chop($Str);
1075: }
1076: $Str .= ', ';
1077: if($firstname ne '') {
1078: $Str .= $firstname.' ';
1079: }
1080: if($middlename ne '') {
1081: $Str .= $middlename;
1082: } else {
1083: chop($Str);
1084: if($firstname eq '') {
1085: chop($Str);
1086: }
1087: }
1088: } else {
1089: if($firstname ne '') {
1090: $Str .= $firstname.' ';
1091: }
1092: if($middlename ne '') {
1093: $Str .= $middlename.' ';
1094: }
1095: if($generation ne '') {
1096: $Str .= $generation;
1097: } else {
1098: chop($Str);
1099: }
1100: }
1101:
1102: return $Str;
1103: }
1104:
1105: =pod
1106:
1107: =item &TestCacheData()
1108:
1109: Determine if the cache database can be accessed with a tie. It waits up to
1110: ten seconds before returning failure. This function exists to help with
1111: the problems with stopping the data download. When an abort occurs and the
1112: user quickly presses a form button and httpd child is created. This
1113: child needs to wait for the other to finish (hopefully within ten seconds).
1114:
1115: =over 4
1116:
1117: Input: $ChartDB
1118:
1119: $ChartDB: The name of the cache database to be opened
1120:
1121: Output: -1, 0, 1
1122:
1123: -1: Could not tie database
1124: 0: Use cached data
1125: 1: New cache database created, use that.
1126:
1127: =back
1128:
1129: =cut
1130:
1131: sub TestCacheData {
1132: my ($ChartDB,$isRecalculate,$totalDelay)=@_;
1133: my $isCached=-1;
1134: my %testData;
1135: my $tieTries=0;
1136:
1137: if(!defined($totalDelay)) {
1138: $totalDelay = 10;
1139: }
1140:
1141: if ((-e "$ChartDB") && (!$isRecalculate)) {
1142: $isCached = 1;
1143: } else {
1144: $isCached = 0;
1145: }
1146:
1147: while($tieTries < $totalDelay) {
1148: my $result=0;
1149: if($isCached) {
1150: $result=tie(%testData,'GDBM_File',$ChartDB,&GDBM_READER(),0640);
1151: } else {
1152: $result=tie(%testData,'GDBM_File',$ChartDB,&GDBM_NEWDB(),0640);
1153: }
1154: if($result) {
1155: last;
1156: }
1157: $tieTries++;
1158: sleep 1;
1159: }
1160: if($tieTries >= $totalDelay) {
1161: return -1;
1162: }
1163:
1164: untie(%testData);
1165:
1166: return $isCached;
1167: }
1168:
1169: sub DownloadStudentCourseData {
1170: my ($students,$checkDate,$cacheDB,$extract,$status,$courseID,$r,$c)=@_;
1171:
1172: my $title = 'LON-CAPA Statistics';
1173: my $heading = 'Download and Process Course Data';
1174: my $studentCount = scalar(@$students);
1175:
1176: my $WhatIWant;
1177: $WhatIWant = '(^version:|';
1178: $WhatIWant .= '^\d+:.+?:(resource\.\d+\.';
1179: $WhatIWant .= '(solved|tries|previous|awarded|(\d+\.submission))\s*$';
1180: $WhatIWant .= '|timestamp)';
1181: $WhatIWant .= ')';
1182: # $WhatIWant = '.';
1183:
1184: if($status eq 'true') {
1185: &Apache::lonhtmlcommon::Create_PrgWin($r, $title, $heading);
1186: }
1187:
1188: my $displayString;
1189: my $count=0;
1190: foreach (@$students) {
1191: my %cache;
1192:
1193: if($c->aborted()) { return 'Aborted'; }
1194:
1195: if($status eq 'true') {
1196: $count++;
1197: my $displayString = $count.'/'.$studentCount.': '.$_;
1198: &Apache::lonhtmlcommon::Update_PrgWin($displayString, $r);
1199: }
1200:
1201: my $downloadTime='Not downloaded';
1202: my $needUpdate = 'false';
1203: if($checkDate eq 'true' &&
1204: tie(%cache,'GDBM_File',$cacheDB,&GDBM_READER(),0640)) {
1205: $downloadTime = $cache{$_.':lastDownloadTime'};
1206: $needUpdate = $cache{'ResourceUpdated'};
1207: untie(%cache);
1208: }
1209:
1210: if($c->aborted()) { return 'Aborted'; }
1211:
1212: if($needUpdate eq 'true') {
1213: $downloadTime = 'Not downloaded';
1214: }
1215: my $courseData =
1216: &DownloadCourseInformation($_, $courseID, $downloadTime,
1217: $WhatIWant);
1218: if(tie(%cache,'GDBM_File',$cacheDB,&GDBM_WRCREAT(),0640)) {
1219: foreach my $key (keys(%$courseData)) {
1220: if($key =~ /^(con_lost|error|no_such_host)/i) {
1221: $courseData->{$_.':error'} = 'No course data for '.$_;
1222: last;
1223: }
1224: }
1225: if($extract eq 'true') {
1226: &ExtractStudentData($courseData, \%cache, \%cache, $_);
1227: } else {
1228: &ProcessStudentData(\%cache, $courseData, $_);
1229: }
1230: untie(%cache);
1231: } else {
1232: next;
1233: }
1234: }
1235: if($status eq 'true') { &Apache::lonhtmlcommon::Close_PrgWin($r); }
1236:
1237: return 'OK';
1238: }
1239:
1240: sub DownloadStudentCourseDataSeparate {
1241: my ($students,$checkDate,$cacheDB,$extract,$status,$courseID,$r,$c)=@_;
1242: my $residualFile = '/home/httpd/perl/tmp/'.$courseID.'DownloadFile.db';
1243: my $title = 'LON-CAPA Statistics';
1244: my $heading = 'Download Course Data';
1245:
1246: my $WhatIWant;
1247: $WhatIWant = '(^version:|';
1248: $WhatIWant .= '^\d+:.+?:(resource\.\d+\.';
1249: $WhatIWant .= '(solved|tries|previous|awarded|(\d+\.submission))\s*$';
1250: $WhatIWant .= '|timestamp)';
1251: $WhatIWant .= ')';
1252:
1253: &CheckForResidualDownload($courseID, $cacheDB, $students, $c);
1254:
1255: my $studentCount = scalar(@$students);
1256: if($status eq 'true') {
1257: &Apache::lonhtmlcommon::Create_PrgWin($r, $title, $heading);
1258: }
1259: my $count=0;
1260: my $displayString='';
1261: foreach (@$students) {
1262: if($c->aborted()) {
1263: return 'Aborted';
1264: }
1265:
1266: if($status eq 'true') {
1267: $count++;
1268: $displayString = $count.'/'.$studentCount.': '.$_;
1269: &Apache::lonhtmlcommon::Update_PrgWin($displayString, $r);
1270: }
1271:
1272: my %cache;
1273: my $downloadTime='Not downloaded';
1274: my $needUpdate = 'false';
1275: if($checkDate eq 'true' &&
1276: tie(%cache,'GDBM_File',$cacheDB,&GDBM_READER(),0640)) {
1277: $downloadTime = $cache{$_.':lastDownloadTime'};
1278: $needUpdate = $cache{'ResourceUpdated'};
1279: untie(%cache);
1280: }
1281:
1282: if($c->aborted()) {
1283: return 'Aborted';
1284: }
1285:
1286: if($needUpdate eq 'true') {
1287: $downloadTime = 'Not downloaded';
1288: }
1289:
1290: my $error = 0;
1291: my $courseData =
1292: &DownloadCourseInformation($_, $courseID, $downloadTime,
1293: $WhatIWant);
1294: my %downloadData;
1295: unless(tie(%downloadData,'GDBM_File',$residualFile,
1296: &GDBM_WRCREAT(),0640)) {
1297: return 'Failed to tie temporary download hash.';
1298: }
1299: foreach my $key (keys(%$courseData)) {
1300: $downloadData{$key} = $courseData->{$key};
1301: if($key =~ /^(con_lost|error|no_such_host)/i) {
1302: $error = 1;
1303: last;
1304: }
1305: }
1306: if($error) {
1307: foreach my $deleteKey (keys(%$courseData)) {
1308: delete $downloadData{$deleteKey};
1309: }
1310: $downloadData{$_.':error'} = 'No course data for '.$_;
1311: }
1312: untie(%downloadData);
1313: }
1314: if($status eq 'true') { &Apache::lonhtmlcommon::Close_PrgWin($r); }
1315:
1316: return &CheckForResidualDownload($cacheDB, 'true', 'true',
1317: $courseID, $r, $c);
1318: }
1319:
1320: sub CheckForResidualDownload {
1321: my ($cacheDB,$extract,$status,$courseID,$r,$c)=@_;
1322:
1323: my $residualFile = '/home/httpd/perl/tmp/'.$courseID.'DownloadFile.db';
1324: if(!-e $residualFile) {
1325: return 'OK';
1326: }
1327:
1328: my %downloadData;
1329: my %cache;
1330: unless(tie(%downloadData,'GDBM_File',$residualFile,&GDBM_READER(),0640)) {
1331: return 'Can not tie database for check for residual download: tempDB';
1332: }
1333: unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_WRCREAT(),0640)) {
1334: untie(%downloadData);
1335: return 'Can not tie database for check for residual download: cacheDB';
1336: }
1337:
1338: my @students=();
1339: my %checkStudent;
1340: my $key;
1341: while(($key, undef) = each %downloadData) {
1342: my @temp = split(':', $key);
1343: my $student = $temp[0].':'.$temp[1];
1344: if(!defined($checkStudent{$student})) {
1345: $checkStudent{$student}++;
1346: push(@students, $student);
1347: }
1348: }
1349:
1350: my $heading = 'Process Course Data';
1351: my $title = 'LON-CAPA Statistics';
1352: my $studentCount = scalar(@students);
1353: if($status eq 'true') {
1354: &Apache::lonhtmlcommon::Create_PrgWin($r, $title, $heading);
1355: }
1356:
1357: my $count=1;
1358: foreach my $name (@students) {
1359: last if($c->aborted());
1360:
1361: if($status eq 'true') {
1362: my $displayString = $count.'/'.$studentCount.': '.$name;
1363: &Apache::lonhtmlcommon::Update_PrgWin($displayString, $r);
1364: }
1365:
1366: if($extract eq 'true') {
1367: &ExtractStudentData(\%downloadData, \%cache, \%cache, $name);
1368: } else {
1369: &ProcessStudentData(\%cache, \%downloadData, $name);
1370: }
1371: $count++;
1372: }
1373:
1374: if($status eq 'true') { &Apache::lonhtmlcommon::Close_PrgWin($r); }
1375:
1376: untie(%cache);
1377: untie(%downloadData);
1378:
1379: if(!$c->aborted()) {
1380: my @files = ($residualFile);
1381: unlink(@files);
1382: }
1383:
1384: return 'OK';
1385: }
1386:
1387: # ----- END HELPER FUNCTIONS --------------------------------------------
1388:
1389: 1;
1390: __END__
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