File:
[LON-CAPA] /
loncom /
interface /
loncoursedata.pm
Revision
1.48:
download - view:
text,
annotated -
select for diffs
Fri Feb 14 21:45:19 2003 UTC (21 years, 4 months ago) by
matthew
Branches:
MAIN
CVS tags:
HEAD
&get_current_state() now uses DIFFERENT keys to store different information
instead of using THE SAME KEY EVERY TIME it stores anything for a student.
Most errors seem to be caused by something between my chair and my keyboard.
1: # The LearningOnline Network with CAPA
2: # (Publication Handler
3: #
4: # $Id: loncoursedata.pm,v 1.48 2003/02/14 21:45:19 matthew 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;
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 ne 'Not downloaded' &&
222: $lastDownloadTime >= $modifiedTime && $modifiedTime >= 0) {
223: # Data is not gathered so return UpToDate as true. This
224: # will be interpreted in ProcessClasslist
225: $courseData{$namedata.':lastDownloadTime'}=time;
226: $courseData{$namedata.':UpToDate'} = 'true';
227: return \%courseData;
228: }
229:
230: # Download course data
231: if(!defined($WhatIWant)) {
232: # set the regular expression to everything by setting it to period
233: $WhatIWant = '.';
234: }
235: %courseData=&Apache::lonnet::dump($courseID, $domain, $name, $WhatIWant);
236: $courseData{'UpToDate'} = 'false';
237: $courseData{'lastDownloadTime'}=time;
238:
239: my %newData;
240: foreach (keys(%courseData)) {
241: # need to have the keys to be prepended with the name:domain of the
242: # student to reduce data collision later.
243: $newData{$namedata.':'.$_} = $courseData{$_};
244: }
245:
246: return \%newData;
247: }
248:
249: # ----- END DOWNLOAD INFORMATION ---------------------------------------
250:
251: =pod
252:
253: =head1 PROCESSING FUNCTIONS
254:
255: These functions process all the data for all the students. Also, they
256: are the functions that access the cache database for writing the majority of
257: the time. The downloading and caching were separated to reduce problems
258: with stopping downloading then can not tie hash to database later.
259:
260: =cut
261:
262: # ----- PROCESSING FUNCTIONS ---------------------------------------
263:
264:
265:
266: =pod
267:
268: =item &get_sequence_assessment_data()
269:
270: AT THIS TIME THE USE OF THIS FUNCTION IS *NOT* RECOMMENDED
271:
272: Use lonnavmaps to build a data structure describing the order and
273: assessment contents of each sequence in the current course.
274:
275: The returned structure is a hash reference.
276:
277: { title => 'title',
278: symb => 'symb',
279: source => '/s/o/u/r/c/e',
280: type => (container|assessment),
281: contents => [ {},{},{},{} ], # only for container
282: parts => [11,13,15], # only for assessment
283: response_ids => [12,14,16] # only for assessment
284: }
285:
286: $hash->{'contents'} is a reference to an array of hashes of the same structure.
287:
288: =cut
289:
290: sub get_sequence_assessment_data {
291: return undef;
292: my $fn=$ENV{'request.course.fn'};
293: &Apache::lonnet::logthis('filename = '.$fn);
294: ##
295: ## use navmaps
296: my $navmap = Apache::lonnavmaps::navmap->new($fn.".db",$fn."_parms.db",
297: 1,0);
298: if (!defined($navmap)) {
299: return 'Can not open Coursemap';
300: }
301: my $iterator = $navmap->getIterator(undef, undef, undef, 1);
302: ##
303: ## Prime the pump
304: ##
305: ## We are going to loop until we run out of sequences/pages to explore for
306: ## resources. This means we have to start out with something to look
307: ## at.
308: my $curRes = $iterator->next(); # BEGIN_MAP
309: $curRes = $iterator->next(); # The sequence itself
310: #
311: my $title = $curRes->title();
312: my $symb = $curRes->symb();
313: my $src = $curRes->src();
314: #
315: my @Nested_Sequences = (); # Stack of sequences, keeps track of depth
316: my $top = { title => $title,
317: symb => $symb,
318: type => 'container',
319: num_assess => 0,
320: contents => [], };
321: push (@Nested_Sequences, $top);
322: #
323: # We need to keep track of which sequences contain homework problems
324: #
325: while (scalar(@Nested_Sequences)) {
326: $curRes = $iterator->next();
327: my $currentmap = $Nested_Sequences[-1]; # Last one on the stack
328: if ($curRes == $iterator->BEGIN_MAP()) {
329: # get the map itself, instead of BEGIN_MAP
330: $curRes = $iterator->next();
331: $title = $curRes->title();
332: $symb = $curRes->symb();
333: $src = $curRes->src();
334: my $newmap = { title => $title,
335: src => $src,
336: symb => $symb,
337: type => 'container',
338: num_assess => 0,
339: contents => [],
340: };
341: push (@{$currentmap->{'contents'}},$newmap); # this is permanent
342: push (@Nested_Sequences, $newmap); # this is a stack
343: next;
344: }
345: if ($curRes == $iterator->END_MAP()) {
346: pop(@Nested_Sequences);
347: next;
348: }
349: next if (! ref($curRes));
350: next if (! $curRes->is_problem() && !$curRes->randomout);
351: # Okay, from here on out we only deal with assessments
352: $title = $curRes->title();
353: $symb = $curRes->symb();
354: $src = $curRes->src();
355: my $parts = $curRes->parts();
356: my $assessment = { title => $title,
357: src => $src,
358: symb => $symb,
359: type => 'assessment',
360: };
361: push(@{$currentmap->{'contents'}},$assessment);
362: $currentmap->{'num_assess'}++;
363: }
364: return $top;
365: }
366:
367: =pod
368:
369: =item &ProcessTopResourceMap()
370:
371: Trace through the "big hash" created in rat/lonuserstate.pm::loadmap.
372: Basically, this function organizes a subset of the data and stores it in
373: cached data. The data stored is the problems, sequences, sequence titles,
374: parts of problems, and their ordering. Column width information is also
375: partially handled here on a per sequence basis.
376:
377: =over 4
378:
379: Input: $cache, $c
380:
381: $cache: A pointer to a hash to store the information
382:
383: $c: The connection class used to determine if an abort has been sent to the
384: browser
385:
386: Output: A string that contains an error message or "OK" if everything went
387: smoothly.
388:
389: =back
390:
391: =cut
392:
393: sub ProcessTopResourceMap {
394: my ($cache,$c)=@_;
395: my %hash;
396: my $fn=$ENV{'request.course.fn'};
397: if(-e "$fn.db") {
398: my $tieTries=0;
399: while($tieTries < 3) {
400: if($c->aborted()) {
401: return;
402: }
403: if(tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER(),0640)) {
404: last;
405: }
406: $tieTries++;
407: sleep 1;
408: }
409: if($tieTries >= 3) {
410: return 'Coursemap undefined.';
411: }
412: } else {
413: return 'Can not open Coursemap.';
414: }
415:
416: my $oldkeys;
417: delete $cache->{'OptionResponses'};
418: if(defined($cache->{'ResourceKeys'})) {
419: $oldkeys = $cache->{'ResourceKeys'};
420: foreach (split(':::', $cache->{'ResourceKeys'})) {
421: delete $cache->{$_};
422: }
423: delete $cache->{'ResourceKeys'};
424: }
425:
426: # Initialize state machine. Set information pointing to top level map.
427: my (@sequences, @currentResource, @finishResource);
428: my ($currentSequence, $currentResourceID, $lastResourceID);
429:
430: $currentResourceID=$hash{'ids_'.
431: &Apache::lonnet::clutter($ENV{'request.course.uri'})};
432: push(@currentResource, $currentResourceID);
433: $lastResourceID=-1;
434: $currentSequence=-1;
435: my $topLevelSequenceNumber = $currentSequence;
436:
437: my %sequenceRecord;
438: my %allkeys;
439: while(1) {
440: if($c->aborted()) {
441: last;
442: }
443: # HANDLE NEW SEQUENCE!
444: #if page || sequence
445: if(defined($hash{'map_pc_'.$hash{'src_'.$currentResourceID}}) &&
446: !defined($sequenceRecord{$currentResourceID})) {
447: $sequenceRecord{$currentResourceID}++;
448: push(@sequences, $currentSequence);
449: push(@currentResource, $currentResourceID);
450: push(@finishResource, $lastResourceID);
451:
452: $currentSequence=$hash{'map_pc_'.$hash{'src_'.$currentResourceID}};
453:
454: # Mark sequence as containing problems. If it doesn't, then
455: # it will be removed when processing for this sequence is
456: # complete. This allows the problems in a sequence
457: # to be outputed before problems in the subsequences
458: if(!defined($cache->{'orderedSequences'})) {
459: $cache->{'orderedSequences'}=$currentSequence;
460: } else {
461: $cache->{'orderedSequences'}.=':'.$currentSequence;
462: }
463: $allkeys{'orderedSequences'}++;
464:
465: $lastResourceID=$hash{'map_finish_'.
466: $hash{'src_'.$currentResourceID}};
467: $currentResourceID=$hash{'map_start_'.
468: $hash{'src_'.$currentResourceID}};
469:
470: if(!($currentResourceID) || !($lastResourceID)) {
471: $currentSequence=pop(@sequences);
472: $currentResourceID=pop(@currentResource);
473: $lastResourceID=pop(@finishResource);
474: if($currentSequence eq $topLevelSequenceNumber) {
475: last;
476: }
477: }
478: next;
479: }
480:
481: # Handle gradable resources: exams, problems, etc
482: $currentResourceID=~/(\d+)\.(\d+)/;
483: my $partA=$1;
484: my $partB=$2;
485: if($hash{'src_'.$currentResourceID}=~
486: /\.(problem|exam|quiz|assess|survey|form)$/ &&
487: $partA eq $currentSequence &&
488: !defined($sequenceRecord{$currentSequence.':'.
489: $currentResourceID})) {
490: $sequenceRecord{$currentSequence.':'.$currentResourceID}++;
491: my $Problem = &Apache::lonnet::symbclean(
492: &Apache::lonnet::declutter($hash{'map_id_'.$partA}).
493: '___'.$partB.'___'.
494: &Apache::lonnet::declutter($hash{'src_'.
495: $currentResourceID}));
496:
497: $cache->{$currentResourceID.':problem'}=$Problem;
498: $allkeys{$currentResourceID.':problem'}++;
499: if(!defined($cache->{$currentSequence.':problems'})) {
500: $cache->{$currentSequence.':problems'}=$currentResourceID;
501: } else {
502: $cache->{$currentSequence.':problems'}.=
503: ':'.$currentResourceID;
504: }
505: $allkeys{$currentSequence.':problems'}++;
506:
507: my $meta=$hash{'src_'.$currentResourceID};
508: # $cache->{$currentResourceID.':title'}=
509: # &Apache::lonnet::metdata($meta,'title');
510: $cache->{$currentResourceID.':title'}=
511: $hash{'title_'.$currentResourceID};
512: $allkeys{$currentResourceID.':title'}++;
513: $cache->{$currentResourceID.':source'}=
514: $hash{'src_'.$currentResourceID};
515: $allkeys{$currentResourceID.':source'}++;
516:
517: # Get Parts for problem
518: my %beenHere;
519: foreach (split(/\,/,&Apache::lonnet::metadata($meta,'packages'))) {
520: if(/^\w+response_\d+.*/) {
521: my (undef, $partId, $responseId) = split(/_/,$_);
522: if($beenHere{'p:'.$partId} == 0) {
523: $beenHere{'p:'.$partId}++;
524: if(!defined($cache->{$currentSequence.':'.
525: $currentResourceID.':parts'})) {
526: $cache->{$currentSequence.':'.$currentResourceID.
527: ':parts'}=$partId;
528: } else {
529: $cache->{$currentSequence.':'.$currentResourceID.
530: ':parts'}.=':'.$partId;
531: }
532: $allkeys{$currentSequence.':'.$currentResourceID.
533: ':parts'}++;
534: }
535: if($beenHere{'r:'.$partId.':'.$responseId} == 0) {
536: $beenHere{'r:'.$partId.':'.$responseId}++;
537: if(!defined($cache->{$currentSequence.':'.
538: $currentResourceID.':'.$partId.
539: ':responseIDs'})) {
540: $cache->{$currentSequence.':'.$currentResourceID.
541: ':'.$partId.':responseIDs'}=$responseId;
542: } else {
543: $cache->{$currentSequence.':'.$currentResourceID.
544: ':'.$partId.':responseIDs'}.=':'.
545: $responseId;
546: }
547: $allkeys{$currentSequence.':'.$currentResourceID.':'.
548: $partId.':responseIDs'}++;
549: }
550: if(/^optionresponse/ &&
551: $beenHere{'o:'.$partId.':'.$currentResourceID} == 0) {
552: $beenHere{'o:'.$partId.$currentResourceID}++;
553: if(defined($cache->{'OptionResponses'})) {
554: $cache->{'OptionResponses'}.= ':::'.
555: $currentSequence.':'.$currentResourceID.':'.
556: $partId.':'.$responseId;
557: } else {
558: $cache->{'OptionResponses'}= $currentSequence.':'.
559: $currentResourceID.':'.
560: $partId.':'.$responseId;
561: }
562: $allkeys{'OptionResponses'}++;
563: }
564: }
565: }
566: }
567:
568: # if resource == finish resource, then it is the end of a sequence/page
569: if($currentResourceID eq $lastResourceID) {
570: # pop off last resource of sequence
571: $currentResourceID=pop(@currentResource);
572: $lastResourceID=pop(@finishResource);
573:
574: if(defined($cache->{$currentSequence.':problems'})) {
575: # Capture sequence information here
576: $cache->{$currentSequence.':title'}=
577: $hash{'title_'.$currentResourceID};
578: $allkeys{$currentSequence.':title'}++;
579: $cache->{$currentSequence.':source'}=
580: $hash{'src_'.$currentResourceID};
581: $allkeys{$currentSequence.':source'}++;
582:
583: my $totalProblems=0;
584: foreach my $currentProblem (split(/\:/,
585: $cache->{$currentSequence.
586: ':problems'})) {
587: foreach (split(/\:/,$cache->{$currentSequence.':'.
588: $currentProblem.
589: ':parts'})) {
590: $totalProblems++;
591: }
592: }
593: my @titleLength=split(//,$cache->{$currentSequence.
594: ':title'});
595: # $extra is 5 for problems correct and 3 for space
596: # between problems correct and problem output
597: my $extra = 8;
598: if(($totalProblems + $extra) > (scalar @titleLength)) {
599: $cache->{$currentSequence.':columnWidth'}=
600: $totalProblems + $extra;
601: } else {
602: $cache->{$currentSequence.':columnWidth'}=
603: (scalar @titleLength);
604: }
605: $allkeys{$currentSequence.':columnWidth'}++;
606: } else {
607: # Remove sequence from list, if it contains no problems to
608: # display.
609: $cache->{'orderedSequences'}=~s/$currentSequence//;
610: $cache->{'orderedSequences'}=~s/::/:/g;
611: $cache->{'orderedSequences'}=~s/^:|:$//g;
612: }
613:
614: $currentSequence=pop(@sequences);
615: if($currentSequence eq $topLevelSequenceNumber) {
616: last;
617: }
618: }
619:
620: # MOVE!!!
621: # move to next resource
622: unless(defined($hash{'to_'.$currentResourceID})) {
623: # big problem, need to handle. Next is probably wrong
624: my $errorMessage = 'Big problem in ';
625: $errorMessage .= 'loncoursedata::ProcessTopLevelMap.';
626: $errorMessage .= " bighash to_$currentResourceID not defined!";
627: &Apache::lonnet::logthis($errorMessage);
628: if (!defined($currentResourceID)) {last;}
629: }
630: my @nextResources=();
631: foreach (split(/\,/,$hash{'to_'.$currentResourceID})) {
632: if(!defined($sequenceRecord{$currentSequence.':'.
633: $hash{'goesto_'.$_}})) {
634: push(@nextResources, $hash{'goesto_'.$_});
635: }
636: }
637: push(@currentResource, @nextResources);
638: # Set the next resource to be processed
639: $currentResourceID=pop(@currentResource);
640: }
641:
642: my @theKeys = keys(%allkeys);
643: my $newkeys = join(':::', @theKeys);
644: $cache->{'ResourceKeys'} = join(':::', $newkeys);
645: if($newkeys ne $oldkeys) {
646: $cache->{'ResourceUpdated'} = 'true';
647: } else {
648: $cache->{'ResourceUpdated'} = 'false';
649: }
650:
651: unless (untie(%hash)) {
652: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
653: "Could not untie coursemap $fn (browse)".
654: ".</font>");
655: }
656:
657: return 'OK';
658: }
659:
660: =pod
661:
662: =item &ProcessClasslist()
663:
664: Taking the class list dumped from &DownloadClasslist(), all the
665: students and their non-class information is processed using the
666: &ProcessStudentInformation() function. A date stamp is also recorded for
667: when the data was processed.
668:
669: Takes data downloaded for a student and breaks it up into managable pieces and
670: stored in cache data. The username, domain, class related date, PID,
671: full name, and section are all processed here.
672:
673: =over 4
674:
675: Input: $cache, $classlist, $courseID, $ChartDB, $c
676:
677: $cache: A hash pointer to store the data
678:
679: $classlist: The hash of data collected about a student from
680: &DownloadClasslist(). The hash contains a list of students, a pointer
681: to a hash of student information for each student, and each students section
682: number.
683:
684: $courseID: The course ID
685:
686: $ChartDB: The name of the cache database file.
687:
688: $c: The connection class used to determine if an abort has been sent to the
689: browser
690:
691: Output: @names
692:
693: @names: An array of students whose information has been processed, and are to
694: be considered in an arbitrary order. The entries in @names are of the form
695: username:domain.
696:
697: The values in $cache are as follows:
698:
699: *NOTE: for the following $name implies username:domain
700: $name.':error' only defined if an error occured. Value
701: contains the error message
702: $name.':lastDownloadTime' unconverted time of the last update of a
703: student\'s course data
704: $name.'updateTime' coverted time of the last update of a
705: student\'s course data
706: $name.':username' username of a student
707: $name.':domain' domain of a student
708: $name.':fullname' full name of a student
709: $name.':id' PID of a student
710: $name.':Status' active/expired status of a student
711: $name.':section' section of a student
712:
713: =back
714:
715: =cut
716:
717: sub ProcessClasslist {
718: my ($cache,$classlist,$courseID,$c)=@_;
719: my @names=();
720:
721: $cache->{'ClasslistTimeStamp'}=$classlist->{'lastDownloadTime'};
722: if($classlist->{'UpToDate'} eq 'true') {
723: return split(/:::/,$cache->{'NamesOfStudents'});;
724: }
725:
726: foreach my $name (keys(%$classlist)) {
727: if($name =~ /\:section/ || $name =~ /\:studentInformation/ ||
728: $name eq '' || $name eq 'UpToDate' || $name eq 'lastDownloadTime') {
729: next;
730: }
731: if($c->aborted()) {
732: return ();
733: }
734: my $studentInformation = $classlist->{$name.':studentInformation'};
735: my $date = $classlist->{$name};
736: my ($studentName,$studentDomain) = split(/\:/,$name);
737:
738: $cache->{$name.':username'}=$studentName;
739: $cache->{$name.':domain'}=$studentDomain;
740: # Initialize timestamp for student
741: if(!defined($cache->{$name.':lastDownloadTime'})) {
742: $cache->{$name.':lastDownloadTime'}='Not downloaded';
743: $cache->{$name.':updateTime'}=' Not updated';
744: }
745:
746: my $error = 0;
747: foreach(keys(%$studentInformation)) {
748: if(/^(con_lost|error|no_such_host)/i) {
749: $cache->{$name.':error'}=
750: 'Could not download student environment data.';
751: $cache->{$name.':fullname'}='';
752: $cache->{$name.':id'}='';
753: $error = 1;
754: }
755: }
756: next if($error);
757: push(@names,$name);
758: $cache->{$name.':fullname'}=&ProcessFullName(
759: $studentInformation->{'lastname'},
760: $studentInformation->{'generation'},
761: $studentInformation->{'firstname'},
762: $studentInformation->{'middlename'});
763: $cache->{$name.':id'}=$studentInformation->{'id'};
764:
765: my ($end, $start)=split(':',$date);
766: $courseID=~s/\_/\//g;
767: $courseID=~s/^(\w)/\/$1/;
768:
769: my $sec='';
770: my $sectionData = $classlist->{$name.':sections'};
771: foreach my $key (keys (%$sectionData)) {
772: my $value = $sectionData->{$key};
773: if ($key=~/^$courseID(?:\/)*(\w+)*\_st$/) {
774: my $tempsection=$1;
775: if($key eq $courseID.'_st') {
776: $tempsection='';
777: }
778: my (undef,$roleend,$rolestart)=split(/\_/,$value);
779: if($roleend eq $end && $rolestart eq $start) {
780: $sec = $tempsection;
781: last;
782: }
783: }
784: }
785:
786: my $status='Expired';
787: if(((!$end) || time < $end) && ((!$start) || (time > $start))) {
788: $status='Active';
789: }
790: $cache->{$name.':Status'}=$status;
791: $cache->{$name.':section'}=$sec;
792:
793: if($sec eq '' || !defined($sec) || $sec eq ' ') {
794: $sec = 'none';
795: }
796: if(defined($cache->{'sectionList'})) {
797: if($cache->{'sectionList'} !~ /(^$sec:|^$sec$|:$sec$|:$sec:)/) {
798: $cache->{'sectionList'} .= ':'.$sec;
799: }
800: } else {
801: $cache->{'sectionList'} = $sec;
802: }
803: }
804:
805: $cache->{'ClasslistTimestamp'}=time;
806: $cache->{'NamesOfStudents'}=join(':::',@names);
807:
808: return @names;
809: }
810:
811: =pod
812:
813: =item &ProcessStudentData()
814:
815: Takes the course data downloaded for a student in
816: &DownloadCourseInformation() and breaks it up into key value pairs
817: to be stored in the cached data. The keys are comprised of the
818: $username:$domain:$keyFromCourseDatabase. The student username:domain is
819: stored away signifying that the students information has been downloaded and
820: can be reused from cached data.
821:
822: =over 4
823:
824: Input: $cache, $courseData, $name
825:
826: $cache: A hash pointer to store data
827:
828: $courseData: A hash pointer that points to the course data downloaded for a
829: student.
830:
831: $name: username:domain
832:
833: Output: None
834:
835: *NOTE: There is no output, but an error message is stored away in the cache
836: data. This is checked in &FormatStudentData(). The key username:domain:error
837: will only exist if an error occured. The error is an error from
838: &DownloadCourseInformation().
839:
840: =back
841:
842: =cut
843:
844: sub ProcessStudentData {
845: my ($cache,$courseData,$name)=@_;
846:
847: if(!&CheckDateStampError($courseData, $cache, $name)) {
848: return;
849: }
850:
851: # This little delete thing, should not be here. Move some other
852: # time though.
853: if(defined($cache->{$name.':keys'})) {
854: foreach (split(':::', $cache->{$name.':keys'})) {
855: delete $cache->{$name.':'.$_};
856: }
857: delete $cache->{$name.':keys'};
858: }
859:
860: my %courseKeys;
861: # user name:domain was prepended earlier in DownloadCourseInformation
862: foreach (keys %$courseData) {
863: my $currentKey = $_;
864: $currentKey =~ s/^$name//;
865: $courseKeys{$currentKey}++;
866: $cache->{$_}=$courseData->{$_};
867: }
868:
869: $cache->{$name.':keys'} = join(':::', keys(%courseKeys));
870:
871: return;
872: }
873:
874: =pod
875:
876: =item &ExtractStudentData()
877:
878: HISTORY: This function originally existed in every statistics module,
879: and performed different tasks, the had some overlap. Due to the need
880: for the data from the different modules, they were combined into
881: a single function.
882:
883: This function now extracts all the necessary course data for a student
884: from what was downloaded from their homeserver. There is some extra
885: time overhead compared to the ProcessStudentInformation function, but
886: it would have had to occurred at some point anyways. This is now
887: typically called while downloading the data it will process. It is
888: the brother function to ProcessStudentInformation.
889:
890: =over 4
891:
892: Input: $input, $output, $data, $name
893:
894: $input: A hash that contains the input data to be processed
895:
896: $output: A hash to contain the processed data
897:
898: $data: A hash containing the information on what is to be
899: processed and how (basically).
900:
901: $name: username:domain
902:
903: The input is slightly different here, but is quite simple.
904: It is currently used where the $input, $output, and $data
905: can and are often the same hashes, but they do not need
906: to be.
907:
908: Output: None
909:
910: *NOTE: There is no output, but an error message is stored away in the cache
911: data. This is checked in &FormatStudentData(). The key username:domain:error
912: will only exist if an error occured. The error is an error from
913: &DownloadCourseInformation().
914:
915: =back
916:
917: =cut
918:
919: sub ExtractStudentData {
920: my ($input, $output, $data, $name)=@_;
921:
922: if(!&CheckDateStampError($input, $data, $name)) {
923: return;
924: }
925:
926: # This little delete thing, should not be here. Move some other
927: # time though.
928: my %allkeys;
929: if(defined($output->{$name.':keys'})) {
930: foreach (split(':::', $output->{$name.':keys'})) {
931: delete $output->{$name.':'.$_};
932: }
933: delete $output->{$name.':keys'};
934: }
935:
936: my ($username,$domain)=split(':',$name);
937:
938: my $Version;
939: my $problemsCorrect = 0;
940: my $totalProblems = 0;
941: my $problemsSolved = 0;
942: my $numberOfParts = 0;
943: my $totalAwarded = 0;
944: foreach my $sequence (split(':', $data->{'orderedSequences'})) {
945: foreach my $problemID (split(':', $data->{$sequence.':problems'})) {
946: my $problem = $data->{$problemID.':problem'};
947: my $LatestVersion = $input->{$name.':version:'.$problem};
948:
949: # Output dashes for all the parts of this problem if there
950: # is no version information about the current problem.
951: $output->{$name.':'.$problemID.':NoVersion'} = 'false';
952: $allkeys{$name.':'.$problemID.':NoVersion'}++;
953: if(!$LatestVersion) {
954: foreach my $part (split(/\:/,$data->{$sequence.':'.
955: $problemID.
956: ':parts'})) {
957: $output->{$name.':'.$problemID.':'.$part.':tries'} = 0;
958: $output->{$name.':'.$problemID.':'.$part.':awarded'} = 0;
959: $output->{$name.':'.$problemID.':'.$part.':code'} = ' ';
960: $allkeys{$name.':'.$problemID.':'.$part.':tries'}++;
961: $allkeys{$name.':'.$problemID.':'.$part.':awarded'}++;
962: $allkeys{$name.':'.$problemID.':'.$part.':code'}++;
963: $totalProblems++;
964: }
965: $output->{$name.':'.$problemID.':NoVersion'} = 'true';
966: next;
967: }
968:
969: my %partData=undef;
970: # Initialize part data, display skips correctly
971: # Skip refers to when a student made no submissions on that
972: # part/problem.
973: foreach my $part (split(/\:/,$data->{$sequence.':'.
974: $problemID.
975: ':parts'})) {
976: $partData{$part.':tries'}=0;
977: $partData{$part.':code'}=' ';
978: $partData{$part.':awarded'}=0;
979: $partData{$part.':timestamp'}=0;
980: foreach my $response (split(':', $data->{$sequence.':'.
981: $problemID.':'.
982: $part.':responseIDs'})) {
983: $partData{$part.':'.$response.':submission'}='';
984: }
985: }
986:
987: # Looping through all the versions of each part, starting with the
988: # oldest version. Basically, it gets the most recent
989: # set of grade data for each part.
990: my @submissions = ();
991: for(my $Version=1; $Version<=$LatestVersion; $Version++) {
992: foreach my $part (split(/\:/,$data->{$sequence.':'.
993: $problemID.
994: ':parts'})) {
995:
996: if(!defined($input->{"$name:$Version:$problem".
997: ":resource.$part.solved"})) {
998: # No grade for this submission, so skip
999: next;
1000: }
1001:
1002: my $tries=0;
1003: my $code=' ';
1004: my $awarded=0;
1005:
1006: $tries = $input->{$name.':'.$Version.':'.$problem.
1007: ':resource.'.$part.'.tries'};
1008: $awarded = $input->{$name.':'.$Version.':'.$problem.
1009: ':resource.'.$part.'.awarded'};
1010:
1011: $partData{$part.':awarded'}=($awarded) ? $awarded : 0;
1012: $partData{$part.':tries'}=($tries) ? $tries : 0;
1013:
1014: $partData{$part.':timestamp'}=$input->{$name.':'.$Version.':'.
1015: $problem.
1016: ':timestamp'};
1017: if(!$input->{$name.':'.$Version.':'.$problem.':resource.'.$part.
1018: '.previous'}) {
1019: foreach my $response (split(':',
1020: $data->{$sequence.':'.
1021: $problemID.':'.
1022: $part.':responseIDs'})) {
1023: @submissions=($input->{$name.':'.$Version.':'.
1024: $problem.
1025: ':resource.'.$part.'.'.
1026: $response.'.submission'},
1027: @submissions);
1028: }
1029: }
1030:
1031: my $val = $input->{$name.':'.$Version.':'.$problem.
1032: ':resource.'.$part.'.solved'};
1033: if ($val eq 'correct_by_student') {$code = '*';}
1034: elsif ($val eq 'correct_by_override') {$code = '+';}
1035: elsif ($val eq 'incorrect_attempted') {$code = '.';}
1036: elsif ($val eq 'incorrect_by_override'){$code = '-';}
1037: elsif ($val eq 'excused') {$code = 'x';}
1038: elsif ($val eq 'ungraded_attempted') {$code = '#';}
1039: else {$code = ' ';}
1040: $partData{$part.':code'}=$code;
1041: }
1042: }
1043:
1044: foreach my $part (split(/\:/,$data->{$sequence.':'.$problemID.
1045: ':parts'})) {
1046: $output->{$name.':'.$problemID.':'.$part.':wrong'} =
1047: $partData{$part.':tries'};
1048: $allkeys{$name.':'.$problemID.':'.$part.':wrong'}++;
1049:
1050: if($partData{$part.':code'} eq '*') {
1051: $output->{$name.':'.$problemID.':'.$part.':wrong'}--;
1052: $problemsCorrect++;
1053: } elsif($partData{$part.':code'} eq '+') {
1054: $output->{$name.':'.$problemID.':'.$part.':wrong'}--;
1055: $problemsCorrect++;
1056: }
1057:
1058: $output->{$name.':'.$problemID.':'.$part.':tries'} =
1059: $partData{$part.':tries'};
1060: $output->{$name.':'.$problemID.':'.$part.':code'} =
1061: $partData{$part.':code'};
1062: $output->{$name.':'.$problemID.':'.$part.':awarded'} =
1063: $partData{$part.':awarded'};
1064: $allkeys{$name.':'.$problemID.':'.$part.':tries'}++;
1065: $allkeys{$name.':'.$problemID.':'.$part.':code'}++;
1066: $allkeys{$name.':'.$problemID.':'.$part.':awarded'}++;
1067:
1068: $totalAwarded += $partData{$part.':awarded'};
1069: $output->{$name.':'.$problemID.':'.$part.':timestamp'} =
1070: $partData{$part.':timestamp'};
1071: $allkeys{$name.':'.$problemID.':'.$part.':timestamp'}++;
1072:
1073: foreach my $response (split(':', $data->{$sequence.':'.
1074: $problemID.':'.
1075: $part.':responseIDs'})) {
1076: $output->{$name.':'.$problemID.':'.$part.':'.$response.
1077: ':submission'}=join(':::',@submissions);
1078: $allkeys{$name.':'.$problemID.':'.$part.':'.$response.
1079: ':submission'}++;
1080: }
1081:
1082: if($partData{$part.':code'} ne 'x') {
1083: $totalProblems++;
1084: }
1085: }
1086: }
1087:
1088: $output->{$name.':'.$sequence.':problemsCorrect'} = $problemsCorrect;
1089: $allkeys{$name.':'.$sequence.':problemsCorrect'}++;
1090: $problemsSolved += $problemsCorrect;
1091: $problemsCorrect=0;
1092: }
1093:
1094: $output->{$name.':problemsSolved'} = $problemsSolved;
1095: $output->{$name.':totalProblems'} = $totalProblems;
1096: $output->{$name.':totalAwarded'} = $totalAwarded;
1097: $allkeys{$name.':problemsSolved'}++;
1098: $allkeys{$name.':totalProblems'}++;
1099: $allkeys{$name.':totalAwarded'}++;
1100:
1101: $output->{$name.':keys'} = join(':::', keys(%allkeys));
1102:
1103: return;
1104: }
1105:
1106: sub LoadDiscussion {
1107: my ($courseID)=@_;
1108: my %Discuss=();
1109: my %contrib=&Apache::lonnet::dump(
1110: $courseID,
1111: $ENV{'course.'.$courseID.'.domain'},
1112: $ENV{'course.'.$courseID.'.num'});
1113:
1114: #my %contrib=&DownloadCourseInformation($name, $courseID, 0);
1115:
1116: foreach my $temp(keys %contrib) {
1117: if ($temp=~/^version/) {
1118: my $ver=$contrib{$temp};
1119: my ($dummy,$prb)=split(':',$temp);
1120: for (my $idx=1; $idx<=$ver; $idx++ ) {
1121: my $name=$contrib{"$idx:$prb:sendername"};
1122: $Discuss{"$name:$prb"}=$idx;
1123: }
1124: }
1125: }
1126:
1127: return \%Discuss;
1128: }
1129:
1130: # ----- END PROCESSING FUNCTIONS ---------------------------------------
1131:
1132: =pod
1133:
1134: =head1 HELPER FUNCTIONS
1135:
1136: These are just a couple of functions do various odd and end
1137: jobs. There was also a couple of bulk functions added. These are
1138: &DownloadStudentCourseData(), &DownloadStudentCourseDataSeparate(), and
1139: &CheckForResidualDownload(). These functions now act as the interface
1140: for downloading student course data. The statistical modules should
1141: no longer make the calls to dump and download and process etc. They
1142: make calls to these bulk functions to get their data.
1143:
1144: =cut
1145:
1146: # ----- HELPER FUNCTIONS -----------------------------------------------
1147:
1148: sub CheckDateStampError {
1149: my ($courseData, $cache, $name)=@_;
1150: if($courseData->{$name.':UpToDate'} eq 'true') {
1151: $cache->{$name.':lastDownloadTime'} =
1152: $courseData->{$name.':lastDownloadTime'};
1153: if($courseData->{$name.':lastDownloadTime'} eq 'Not downloaded') {
1154: $cache->{$name.':updateTime'} = ' Not updated';
1155: } else {
1156: $cache->{$name.':updateTime'}=
1157: localtime($courseData->{$name.':lastDownloadTime'});
1158: }
1159: return 0;
1160: }
1161:
1162: $cache->{$name.':lastDownloadTime'}=$courseData->{$name.':lastDownloadTime'};
1163: if($courseData->{$name.':lastDownloadTime'} eq 'Not downloaded') {
1164: $cache->{$name.':updateTime'} = ' Not updated';
1165: } else {
1166: $cache->{$name.':updateTime'}=
1167: localtime($courseData->{$name.':lastDownloadTime'});
1168: }
1169:
1170: if(defined($courseData->{$name.':error'})) {
1171: $cache->{$name.':error'}=$courseData->{$name.':error'};
1172: return 0;
1173: }
1174:
1175: return 1;
1176: }
1177:
1178: =pod
1179:
1180: =item &ProcessFullName()
1181:
1182: Takes lastname, generation, firstname, and middlename (or some partial
1183: set of this data) and returns the full name version as a string. Format
1184: is Lastname generation, firstname middlename or a subset of this.
1185:
1186: =cut
1187:
1188: sub ProcessFullName {
1189: my ($lastname, $generation, $firstname, $middlename)=@_;
1190: my $Str = '';
1191:
1192: # Strip whitespace preceeding & following name components.
1193: $lastname =~ s/(\s+$|^\s+)//g;
1194: $generation =~ s/(\s+$|^\s+)//g;
1195: $firstname =~ s/(\s+$|^\s+)//g;
1196: $middlename =~ s/(\s+$|^\s+)//g;
1197:
1198: if($lastname ne '') {
1199: $Str .= $lastname;
1200: $Str .= ' '.$generation if ($generation ne '');
1201: $Str .= ',';
1202: $Str .= ' '.$firstname if ($firstname ne '');
1203: $Str .= ' '.$middlename if ($middlename ne '');
1204: } else {
1205: $Str .= $firstname if ($firstname ne '');
1206: $Str .= ' '.$middlename if ($middlename ne '');
1207: $Str .= ' '.$generation if ($generation ne '');
1208: }
1209:
1210: return $Str;
1211: }
1212:
1213: =pod
1214:
1215: =item &TestCacheData()
1216:
1217: Determine if the cache database can be accessed with a tie. It waits up to
1218: ten seconds before returning failure. This function exists to help with
1219: the problems with stopping the data download. When an abort occurs and the
1220: user quickly presses a form button and httpd child is created. This
1221: child needs to wait for the other to finish (hopefully within ten seconds).
1222:
1223: =over 4
1224:
1225: Input: $ChartDB
1226:
1227: $ChartDB: The name of the cache database to be opened
1228:
1229: Output: -1, 0, 1
1230:
1231: -1: Could not tie database
1232: 0: Use cached data
1233: 1: New cache database created, use that.
1234:
1235: =back
1236:
1237: =cut
1238:
1239: sub TestCacheData {
1240: my ($ChartDB,$isRecalculate,$totalDelay)=@_;
1241: my $isCached=-1;
1242: my %testData;
1243: my $tieTries=0;
1244:
1245: if(!defined($totalDelay)) {
1246: $totalDelay = 10;
1247: }
1248:
1249: if ((-e "$ChartDB") && (!$isRecalculate)) {
1250: $isCached = 1;
1251: } else {
1252: $isCached = 0;
1253: }
1254:
1255: while($tieTries < $totalDelay) {
1256: my $result=0;
1257: if($isCached) {
1258: $result=tie(%testData,'GDBM_File',$ChartDB,&GDBM_READER(),0640);
1259: } else {
1260: $result=tie(%testData,'GDBM_File',$ChartDB,&GDBM_NEWDB(),0640);
1261: }
1262: if($result) {
1263: last;
1264: }
1265: $tieTries++;
1266: sleep 1;
1267: }
1268: if($tieTries >= $totalDelay) {
1269: return -1;
1270: }
1271:
1272: untie(%testData);
1273:
1274: return $isCached;
1275: }
1276:
1277: sub DownloadStudentCourseData {
1278: my ($students,$checkDate,$cacheDB,$extract,$status,$courseID,$r,$c)=@_;
1279:
1280: my $title = 'LON-CAPA Statistics';
1281: my $heading = 'Download and Process Course Data';
1282: my $studentCount = scalar(@$students);
1283:
1284: my $WhatIWant;
1285: $WhatIWant = '(^version:|';
1286: $WhatIWant .= '^\d+:.+?:(resource\.\d+\.';
1287: $WhatIWant .= '(solved|tries|previous|awarded|(\d+\.submission))\s*$';#'
1288: $WhatIWant .= '|timestamp)';
1289: $WhatIWant .= ')';
1290: # $WhatIWant = '.';
1291:
1292: if($status eq 'true') {
1293: &Apache::lonhtmlcommon::Create_PrgWin($r, $title, $heading);
1294: }
1295:
1296: my $displayString;
1297: my $count=0;
1298: foreach (@$students) {
1299: my %cache;
1300:
1301: if($c->aborted()) { return 'Aborted'; }
1302:
1303: if($status eq 'true') {
1304: $count++;
1305: my $displayString = $count.'/'.$studentCount.': '.$_;
1306: &Apache::lonhtmlcommon::Update_PrgWin($displayString, $r);
1307: }
1308:
1309: my $downloadTime='Not downloaded';
1310: my $needUpdate = 'false';
1311: if($checkDate eq 'true' &&
1312: tie(%cache,'GDBM_File',$cacheDB,&GDBM_READER(),0640)) {
1313: $downloadTime = $cache{$_.':lastDownloadTime'};
1314: $needUpdate = $cache{'ResourceUpdated'};
1315: untie(%cache);
1316: }
1317:
1318: if($c->aborted()) { return 'Aborted'; }
1319:
1320: if($needUpdate eq 'true') {
1321: $downloadTime = 'Not downloaded';
1322: }
1323: my $courseData =
1324: &DownloadCourseInformation($_, $courseID, $downloadTime,
1325: $WhatIWant);
1326: if(tie(%cache,'GDBM_File',$cacheDB,&GDBM_WRCREAT(),0640)) {
1327: foreach my $key (keys(%$courseData)) {
1328: if($key =~ /^(con_lost|error|no_such_host)/i) {
1329: $courseData->{$_.':error'} = 'No course data for '.$_;
1330: last;
1331: }
1332: }
1333: if($extract eq 'true') {
1334: &ExtractStudentData($courseData, \%cache, \%cache, $_);
1335: } else {
1336: &ProcessStudentData(\%cache, $courseData, $_);
1337: }
1338: untie(%cache);
1339: } else {
1340: next;
1341: }
1342: }
1343: if($status eq 'true') { &Apache::lonhtmlcommon::Close_PrgWin($r); }
1344:
1345: return 'OK';
1346: }
1347:
1348: sub DownloadStudentCourseDataSeparate {
1349: my ($students,$checkDate,$cacheDB,$extract,$status,$courseID,$r,$c)=@_;
1350: my $residualFile = $Apache::lonnet::tmpdir.$courseID.'DownloadFile.db';
1351: my $title = 'LON-CAPA Statistics';
1352: my $heading = 'Download Course Data';
1353:
1354: my $WhatIWant;
1355: $WhatIWant = '(^version:|';
1356: $WhatIWant .= '^\d+:.+?:(resource\.\d+\.';
1357: $WhatIWant .= '(solved|tries|previous|awarded|(\d+\.submission))\s*$';#'
1358: $WhatIWant .= '|timestamp)';
1359: $WhatIWant .= ')';
1360:
1361: &CheckForResidualDownload($cacheDB, 'true', 'true', $courseID, $r, $c);
1362:
1363: my $studentCount = scalar(@$students);
1364: if($status eq 'true') {
1365: &Apache::lonhtmlcommon::Create_PrgWin($r, $title, $heading);
1366: }
1367: my $count=0;
1368: my $displayString='';
1369: foreach (@$students) {
1370: if($c->aborted()) {
1371: return 'Aborted';
1372: }
1373:
1374: if($status eq 'true') {
1375: $count++;
1376: $displayString = $count.'/'.$studentCount.': '.$_;
1377: &Apache::lonhtmlcommon::Update_PrgWin($displayString, $r);
1378: }
1379:
1380: my %cache;
1381: my $downloadTime='Not downloaded';
1382: my $needUpdate = 'false';
1383: if($checkDate eq 'true' &&
1384: tie(%cache,'GDBM_File',$cacheDB,&GDBM_READER(),0640)) {
1385: $downloadTime = $cache{$_.':lastDownloadTime'};
1386: $needUpdate = $cache{'ResourceUpdated'};
1387: untie(%cache);
1388: }
1389:
1390: if($c->aborted()) {
1391: return 'Aborted';
1392: }
1393:
1394: if($needUpdate eq 'true') {
1395: $downloadTime = 'Not downloaded';
1396: }
1397:
1398: my $error = 0;
1399: my $courseData =
1400: &DownloadCourseInformation($_, $courseID, $downloadTime,
1401: $WhatIWant);
1402: my %downloadData;
1403: unless(tie(%downloadData,'GDBM_File',$residualFile,
1404: &GDBM_WRCREAT(),0640)) {
1405: return 'Failed to tie temporary download hash.';
1406: }
1407: foreach my $key (keys(%$courseData)) {
1408: $downloadData{$key} = $courseData->{$key};
1409: if($key =~ /^(con_lost|error|no_such_host)/i) {
1410: $error = 1;
1411: last;
1412: }
1413: }
1414: if($error) {
1415: foreach my $deleteKey (keys(%$courseData)) {
1416: delete $downloadData{$deleteKey};
1417: }
1418: $downloadData{$_.':error'} = 'No course data for '.$_;
1419: }
1420: untie(%downloadData);
1421: }
1422: if($status eq 'true') { &Apache::lonhtmlcommon::Close_PrgWin($r); }
1423:
1424: return &CheckForResidualDownload($cacheDB, 'true', 'true',
1425: $courseID, $r, $c);
1426: }
1427:
1428: sub CheckForResidualDownload {
1429: my ($cacheDB,$extract,$status,$courseID,$r,$c)=@_;
1430:
1431: my $residualFile = $Apache::lonnet::tmpdir.$courseID.'DownloadFile.db';
1432: if(!-e $residualFile) {
1433: return 'OK';
1434: }
1435:
1436: my %downloadData;
1437: my %cache;
1438: unless(tie(%downloadData,'GDBM_File',$residualFile,&GDBM_READER(),0640)) {
1439: return 'Can not tie database for check for residual download: tempDB';
1440: }
1441: unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_WRCREAT(),0640)) {
1442: untie(%downloadData);
1443: return 'Can not tie database for check for residual download: cacheDB';
1444: }
1445:
1446: my @students=();
1447: my %checkStudent;
1448: my $key;
1449: while(($key, undef) = each %downloadData) {
1450: my @temp = split(':', $key);
1451: my $student = $temp[0].':'.$temp[1];
1452: if(!defined($checkStudent{$student})) {
1453: $checkStudent{$student}++;
1454: push(@students, $student);
1455: }
1456: }
1457:
1458: my $heading = 'Process Course Data';
1459: my $title = 'LON-CAPA Statistics';
1460: my $studentCount = scalar(@students);
1461: if($status eq 'true') {
1462: &Apache::lonhtmlcommon::Create_PrgWin($r, $title, $heading);
1463: }
1464:
1465: my $count=1;
1466: foreach my $name (@students) {
1467: last if($c->aborted());
1468:
1469: if($status eq 'true') {
1470: my $displayString = $count.'/'.$studentCount.': '.$name;
1471: &Apache::lonhtmlcommon::Update_PrgWin($displayString, $r);
1472: }
1473:
1474: if($extract eq 'true') {
1475: &ExtractStudentData(\%downloadData, \%cache, \%cache, $name);
1476: } else {
1477: &ProcessStudentData(\%cache, \%downloadData, $name);
1478: }
1479: $count++;
1480: }
1481:
1482: if($status eq 'true') { &Apache::lonhtmlcommon::Close_PrgWin($r); }
1483:
1484: untie(%cache);
1485: untie(%downloadData);
1486:
1487: if(!$c->aborted()) {
1488: my @files = ($residualFile);
1489: unlink(@files);
1490: }
1491:
1492: return 'OK';
1493: }
1494:
1495:
1496: ################################################
1497: ################################################
1498:
1499: =pod
1500:
1501: =item &make_into_hash($values);
1502:
1503: Returns a reference to a hash as described by $values. $values is
1504: assumed to be the result of
1505: join(':',map {&Apache::lonnet::escape($_)} %orighash;
1506:
1507: This is a helper function for get_current_state.
1508:
1509: =cut
1510:
1511: ################################################
1512: ################################################
1513: sub make_into_hash {
1514: my $values = shift;
1515: my %tmp = map { &Apache::lonnet::unescape($_); }
1516: split(':',$values);
1517: return \%tmp;
1518: }
1519:
1520:
1521: ################################################
1522: ################################################
1523:
1524: =pod
1525:
1526: =item &get_current_state($sname,$sdom,$symb,$courseid);
1527:
1528: Retrieve the current status of a students performance. $sname and
1529: $sdom are the only required parameters. If $symb is undef the results
1530: of an &Apache::lonnet::currentdump() will be returned.
1531: If $courseid is undef it will be retrieved from the environment.
1532:
1533: The return structure is based on &Apache::lonnet::currentdump. If
1534: $symb is unspecified, all the students data is returned in a hash of
1535: the form:
1536: (
1537: symb1 => { param1 => value1, param2 => value2 ... },
1538: symb2 => { param1 => value1, param2 => value2 ... },
1539: )
1540:
1541: If $symb is specified, a hash of
1542: (
1543: param1 => value1,
1544: param2 => value2,
1545: )
1546: is returned.
1547:
1548: If no data is found for $symb, or if the student has not performance data,
1549: an empty list is returned.
1550:
1551: =cut
1552:
1553: ################################################
1554: ################################################
1555: sub get_current_state {
1556: my ($sname,$sdom,$symb,$courseid,$forcedownload)=@_;
1557: return () if (! defined($sname) || ! defined($sdom));
1558: #
1559: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1560: #
1561: my $cachefilename = $Apache::lonnet::tmpdir.$ENV{'user.name'}.'_'.
1562: $ENV{'user.domain'}.'_'.
1563: $courseid.'_student_data.db';
1564: my %cache;
1565: #
1566: my %student_data; # return values go here
1567: #
1568: my $updatetime = 0;
1569: my $key = &Apache::lonnet::escape($sname).':'.
1570: &Apache::lonnet::escape($sdom).':';
1571: # Open the cache file
1572: if (tie(%cache,'GDBM_File',$cachefilename,&GDBM_READER(),0640)) {
1573: if (exists($cache{$key.'time'})) {
1574: $updatetime = $cache{$key.'time'};
1575: # &Apache::lonnet::logthis('got updatetime of '.$updatetime);
1576: }
1577: untie(%cache);
1578: }
1579: # timestamp/devalidation
1580: my $modifiedtime = 1;
1581: # Take whatever steps are neccessary at this point to give $modifiedtime a
1582: # new value
1583: #
1584: if (($updatetime < $modifiedtime) ||
1585: (defined($forcedownload) && $forcedownload)) {
1586: # &Apache::lonnet::logthis("loading data");
1587: # Get all the students current data
1588: my $time_of_retrieval = time;
1589: my @tmp = &Apache::lonnet::currentdump($courseid,$sdom,$sname);
1590: if ((scalar(@tmp) > 0) && ($tmp[0] =~ /^error:/)) {
1591: &Apache::lonnet::logthis('error getting data for '.
1592: $sname.':'.$sdom.' in course '.$courseid.
1593: ':'.$tmp[0]);
1594: return ();
1595: }
1596: %student_data = @tmp;
1597: #
1598: # Store away the data
1599: #
1600: # The cache structure is colon deliminated.
1601: # $uname:$udom:time => timestamp
1602: # $uname:$udom:$symb => $parm1:$val1:$parm2:$val2 ...
1603: #
1604: # BEWARE: The colons are NOT escaped so can search with escaped
1605: # keys instead of unescaping every key.
1606: #
1607: if (tie(%cache,'GDBM_File',$cachefilename,&GDBM_WRCREAT(),0640)) {
1608: # &Apache::lonnet::logthis("writing data");
1609: while (my ($current_symb,$param_hash) = each(%student_data)) {
1610: my @Parameters = %{$param_hash};
1611: my $value = join(':',map { &Apache::lonnet::escape($_); }
1612: @Parameters);
1613: # Store away the values
1614: $cache{$key.&Apache::lonnet::escape($current_symb)}=$value;
1615: }
1616: $cache{$key.'time'}=$time_of_retrieval;
1617: untie(%cache);
1618: }
1619: } else {
1620: &Apache::lonnet::logthis('retrieving cached data ');
1621: if (tie(%cache,'GDBM_File',$cachefilename,&GDBM_READER(),0640)) {
1622: if (defined($symb)) {
1623: my $searchkey = $key.&Apache::lonnet::escape($symb);
1624: if (exists($cache{$searchkey})) {
1625: $student_data{$symb} = &make_into_hash($cache{$searchkey});
1626: }
1627: } else {
1628: my $searchkey = '^'.$key.'(.*)$';#'
1629: while (my ($testkey,$params)=each(%cache)) {
1630: if ($testkey =~ /$searchkey/) { # \Q \E? May be necc.
1631: my $tmpsymb = $1;
1632: next if ($tmpsymb =~ 'time');
1633: # &Apache::lonnet::logthis('found '.$tmpsymb.':');
1634: $student_data{&Apache::lonnet::unescape($tmpsymb)} =
1635: &make_into_hash($params);
1636: }
1637: }
1638: }
1639: untie(%cache);
1640: }
1641: }
1642: if (! defined($symb)) {
1643: # &Apache::lonnet::logthis("returning all data");
1644: return %student_data;
1645: } elsif (exists($student_data{$symb})) {
1646: # &Apache::lonnet::logthis("returning data for symb=".$symb);
1647: return %{$student_data{$symb}};
1648: } else {
1649: return ();
1650: }
1651: }
1652:
1653: ################################################
1654: ################################################
1655:
1656: =pod
1657:
1658: =item &get_classlist();
1659:
1660: Retrieve the classist of a given class or of the current class. Student
1661: information is returned from the classlist.db file and, if needed,
1662: from the students environment.
1663:
1664: Optional arguments are $cid, $cdom, and $cnum (course id, course domain,
1665: and course number, respectively). Any omitted arguments will be taken
1666: from the current environment ($ENV{'request.course.id'},
1667: $ENV{'course.'.$cid.'.domain'}, and $ENV{'course.'.$cid.'.num'}).
1668:
1669: Returns a reference to a hash which contains:
1670: keys '$sname:$sdom'
1671: values [$end,$start,$id,$section,$fullname]
1672:
1673: =cut
1674:
1675: ################################################
1676: ################################################
1677:
1678: sub get_classlist {
1679: my ($cid,$cdom,$cnum) = @_;
1680: $cid = $cid || $ENV{'request.course.id'};
1681: $cdom = $cdom || $ENV{'course.'.$cid.'.domain'};
1682: $cnum = $cnum || $ENV{'course.'.$cid.'.num'};
1683: my $now = time;
1684: #
1685: my %classlist=&Apache::lonnet::dump('classlist',$cdom,$cnum);
1686: while (my ($student,$info) = each(%classlist)) {
1687: return undef if ($student =~ /^(con_lost|error|no_such_host)/i);
1688: my ($sname,$sdom) = split(/:/,$student);
1689: my @Values = split(/:/,$info);
1690: my ($end,$start,$id,$section,$fullname);
1691: if (@Values > 2) {
1692: ($end,$start,$id,$section,$fullname) = @Values;
1693: } else { # We have to get the data ourselves
1694: ($end,$start) = @Values;
1695: $section = &Apache::lonnet::getsection($sdom,$sname,$cid);
1696: my %info=&Apache::lonnet::get('environment',
1697: ['firstname','middlename',
1698: 'lastname','generation','id'],
1699: $sdom, $sname);
1700: my ($tmp) = keys(%info);
1701: if ($tmp =~/^(con_lost|error|no_such_host)/i) {
1702: $fullname = 'not available';
1703: $id = 'not available';
1704: &Apache::lonnet::logthis('unable to retrieve environment '.
1705: 'for '.$sname.':'.$sdom);
1706: } else {
1707: $fullname = &ProcessFullName(@info{qw/lastname generation
1708: firstname middlename/});
1709: $id = $info{'id'};
1710: }
1711: # Update the classlist with this students information
1712: if ($fullname ne 'not available') {
1713: my $enrolldata = join(':',$end,$start,$id,$section,$fullname);
1714: my $reply=&Apache::lonnet::cput('classlist',
1715: {$student => $enrolldata},
1716: $cdom,$cnum);
1717: if ($reply !~ /^(ok|delayed)/) {
1718: &Apache::lonnet::logthis('Unable to update classlist for '.
1719: 'student '.$sname.':'.$sdom.
1720: ' error:'.$reply);
1721: }
1722: }
1723: }
1724: my $status='Expired';
1725: if(((!$end) || $now < $end) && ((!$start) || ($now > $start))) {
1726: $status='Active';
1727: }
1728: $classlist{$student} =
1729: [$sdom,$sname,$end,$start,$id,$section,$fullname,$status];
1730: }
1731: if (wantarray()) {
1732: return (\%classlist,['domain','username','end','start','id',
1733: 'section','fullname','status']);
1734: } else {
1735: return \%classlist;
1736: }
1737: }
1738:
1739: # ----- END HELPER FUNCTIONS --------------------------------------------
1740:
1741: 1;
1742: __END__
1743:
1744:
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to loncoursedata.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / interface