1: #
2: # $Id: assesscalc.pm,v 1.19 2003/09/05 01:57:54 matthew Exp $
3: #
4: # Copyright Michigan State University Board of Trustees
5: #
6: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
7: #
8: # LON-CAPA is free software; you can redistribute it and/or modify
9: # it under the terms of the GNU General Public License as published by
10: # the Free Software Foundation; either version 2 of the License, or
11: # (at your option) any later version.
12: #
13: # LON-CAPA is distributed in the hope that it will be useful,
14: # but WITHOUT ANY WARRANTY; without even the implied warranty of
15: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16: # GNU General Public License for more details.
17: #
18: # You should have received a copy of the GNU General Public License
19: # along with LON-CAPA; if not, write to the Free Software
20: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21: #
22: # /home/httpd/html/adm/gpl.txt
23: #
24: # http://www.lon-capa.org/
25: #
26: # The LearningOnline Network with CAPA
27: # Spreadsheet/Grades Display Handler
28: #
29: # POD required stuff:
30:
31: =head1 NAME
32:
33: assesscalc
34:
35: =head1 SYNOPSIS
36:
37: =head1 DESCRIPTION
38:
39: =cut
40:
41: ###################################################
42: ### AssessSheet ###
43: ###################################################
44: package Apache::assesscalc;
45:
46: use strict;
47: use warnings FATAL=>'all';
48: no warnings 'uninitialized';
49: use Apache::Constants qw(:common :http);
50: use Apache::lonnet;
51: use Apache::loncommon;
52: use Apache::Spreadsheet;
53: use HTML::Entities();
54: use Spreadsheet::WriteExcel;
55: use GDBM_File;
56: use Time::HiRes;
57:
58: @Apache::assesscalc::ISA = ('Apache::Spreadsheet');
59:
60: ########################################################
61: ########################################################
62:
63: =pod
64:
65: =head2 Package Variables
66:
67: =over 4
68:
69: =item %Exportrows
70:
71: =item $current_name
72:
73: =item $current_domain
74:
75: =item $current_course
76:
77: =item %parmhash
78:
79: =item %nice_parameter_name
80:
81: =item %useropt
82:
83: =item %courseopt
84:
85: =back
86:
87: =cut
88:
89: ########################################################
90: ########################################################
91:
92: my %Exportrows;
93:
94: my $current_name;
95: my $current_domain;
96: my $current_course;
97:
98: my %parmhash;
99: my %nice_parameter_name;
100:
101: my %useropt;
102: my %courseopt;
103:
104: ########################################################
105: ########################################################
106:
107: =pod
108:
109: =head2 Package Subroutines
110:
111: =item &clear_package()
112:
113: Reset all package variables.
114:
115: =cut
116:
117: ########################################################
118: ########################################################
119: sub clear_package {
120: undef(%Exportrows);
121: undef($current_name);
122: undef($current_domain);
123: undef($current_course);
124: undef(%useropt);
125: undef(%courseopt);
126: }
127:
128: sub initialize {
129: &clear_package();
130: }
131:
132: ########################################################
133: ########################################################
134:
135: =pod
136:
137: =item &initialize_package()
138:
139: =cut
140:
141: ########################################################
142: ########################################################
143: sub initialize_package {
144: my ($sname,$sdomain) = @_;
145: $current_name = $sname;
146: $current_domain = $sdomain;
147: if ($current_course ne $ENV{'request.course.id'}) {
148: $current_course = $ENV{'request.course.id'};
149: undef(%courseopt);
150: }
151: &load_cached_export_rows();
152: &load_parameter_caches();
153: }
154:
155: ########################################################
156: ########################################################
157:
158: =pod
159:
160: =item &load_parameter_caches()
161:
162: =cut
163:
164: ########################################################
165: ########################################################
166: sub load_parameter_caches {
167: my $userprefix = $current_name.':'.$current_domain.'_';
168: $userprefix =~ s/:/_/g;
169: #
170: # Course Parameters Cache
171: if (! %courseopt) {
172: $current_course = $ENV{'request.course.id'};
173: undef(%courseopt);
174: if (! defined($current_name) || ! defined($current_domain)) {
175: &Apache::lonnet::logthis('bad call to setup_parameter_caches');
176: return;
177: }
178: my $dom = $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
179: my $id = $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
180: my %Tmp = &Apache::lonnet::dump('resourcedata',$dom,$id);
181: while (my ($name,$value) = each(%Tmp)) {
182: $courseopt{$name}=$value;
183: }
184: }
185: if (! %useropt) {
186: my %Tmp = &Apache::lonnet::dump('resourcedata',
187: $current_domain,$current_name);
188: while (my ($name,$value) = each(%Tmp)) {
189: if ($name =~ /^error: 2/ || $name =~ /no such file/) {
190: undef(%useropt);
191: last;
192: }
193: $useropt{$userprefix.$name}=$value;
194: }
195: }
196: }
197:
198: ########################################################
199: ########################################################
200:
201: =pod
202:
203: =head2 assesscalc object methods
204:
205: =cut
206:
207: ########################################################
208: ########################################################
209: sub ensure_current_parameter_caches {
210: my $self = shift;
211: ##
212: ## Check for a modified parameters
213: ##
214: if (! defined($current_course) ||
215: $current_course ne $ENV{'request.course.id'} ) {
216: $current_course = $ENV{'request.course.id'};
217: undef(%courseopt);
218: }
219: ##
220: ## Check for new user
221: ##
222: if (! defined($current_name) || $current_name ne $self->{'name'} ||
223: ! defined($current_domain) || $current_domain ne $self->{'domain'}) {
224: $current_domain = $self->{'domain'};
225: $current_name = $self->{'name'};
226: undef(%useropt);
227: }
228: &load_parameter_caches();
229: }
230:
231: ##################################################
232: ##################################################
233:
234: =pod
235:
236: =item &parmval()
237:
238: Determine the value of a parameter.
239:
240: Inputs: $what, the parameter needed, $symb, $uname, $udom, $csec
241:
242: Returns: The value of a parameter, or '' if none.
243:
244: This function cascades through the possible levels searching for a value for
245: a parameter. The levels are checked in the following order:
246: user, course (at section level and course level), map, and lonnet::metadata.
247: This function uses %parmhash, which must be tied prior to calling it.
248: This function also requires %courseopt and %useropt to be initialized for
249: this user and course.
250:
251: =cut
252:
253: ##################################################
254: ##################################################
255: sub parmval {
256: my $self = shift;
257: my ($what,$symb,$uname,$udom,$csec,$recurse)=@_;
258: $uname = $self->{'name'} if (! defined($uname));
259: $udom = $self->{'domain'} if (! defined($udom));
260: $csec = $self->{'section'} if (! defined($csec));
261: $symb = $self->{'symb'} if (! defined($symb));
262: #
263: my $result='';
264: #
265: # This should be a
266: my ($mapname,$id,$fn)=split(/___/,$symb);
267: # Cascading lookup scheme
268: my $rwhat=$what;
269: $what =~ s/^parameter\_//;
270: $what =~ s/\_([^\_]+)$/\.$1/;
271: #
272: my $symbparm = $symb.'.'.$what;
273: my $mapparm = $mapname.'___(all).'.$what;
274: my $courseprefix = $self->{'cid'};
275: my $usercourseprefix = $uname.'_'.$udom.'_'.$self->{'cid'};
276: #
277: my $seclevel = $courseprefix.'.['.$csec.'].'.$what;
278: my $seclevelr = $courseprefix.'.['.$csec.'].'.$symbparm;
279: my $seclevelm = $courseprefix.'.['.$csec.'].'.$mapparm;
280: #
281: my $courselevel = $courseprefix.'.'.$what;
282: my $courselevelr = $courseprefix.'.'.$symbparm;
283: my $courselevelm = $courseprefix.'.'.$mapparm;
284: #
285: my $ucourselevel = $usercourseprefix.'.'.$what;
286: my $ucourselevelr = $usercourseprefix.'.'.$symbparm;
287: my $ucourselevelm = $usercourseprefix.'.'.$mapparm;
288: # check user
289: if (defined($uname)) {
290: return $useropt{$ucourselevelr} if (defined($useropt{$ucourselevelr}));
291: return $useropt{$ucourselevelm} if (defined($useropt{$ucourselevelm}));
292: return $useropt{$ucourselevel} if (defined($useropt{$ucourselevel}));
293: }
294: # check section
295: if (defined($csec)) {
296: return $courseopt{$seclevelr} if (defined($courseopt{$seclevelr}));
297: return $courseopt{$seclevelm} if (defined($courseopt{$seclevelm}));
298: return $courseopt{$seclevel} if (defined($courseopt{$seclevel}));
299: }
300: #
301: # check course
302: return $courseopt{$courselevelr} if (defined($courseopt{$courselevelr}));
303: return $courseopt{$courselevelm} if (defined($courseopt{$courselevelm}));
304: return $courseopt{$courselevel} if (defined($courseopt{$courselevel}));
305: # check map parms
306: my $thisparm = $parmhash{$symbparm};
307: return $thisparm if (defined($thisparm));
308: # check default
309: $thisparm = &Apache::lonnet::metadata($fn,$rwhat.'.default');
310: return $thisparm if (defined($thisparm));
311: #
312: # Cascade Up
313: my $space=$what;
314: $space=~s/\.\w+$//;
315: if ($space ne '0') {
316: my @parts=split(/_/,$space);
317: my $id=pop(@parts);
318: my $part=join('_',@parts);
319: if ($part eq '') { $part='0'; }
320: my $newwhat=$rwhat;
321: $newwhat=~s/\Q$space\E/$part/;
322: my $partgeneral=$self->parmval($newwhat,$symb,$uname,$udom,$csec,1);
323: if (defined($partgeneral)) { return $partgeneral; }
324: }
325: if ($recurse) { return undef; }
326: my $pack_def=&Apache::lonnet::packages_tab_default($fn,'resource.'.$what);
327: if (defined($pack_def)) { return $pack_def; }
328: #nothing defined
329: return '';
330: }
331:
332: sub get_html_title {
333: my $self = shift;
334: my ($assess_title,$name,$time) = $self->get_title();
335: my $title = '<h1>'.$assess_title.'</h1>'.
336: '<h2>'.$name.', '.
337: &Apache::loncommon::aboutmewrapper
338: ($self->{'name'}.'@'.$self->{'domain'},
339: $self->{'name'},$self->{'domain'});
340: $title .= '<h3>'.$time.'</h3>';
341: return $title;
342: }
343:
344: sub get_title {
345: my $self = shift;
346: my @title = ();
347: if (($self->{'symb'} eq '_feedback') ||
348: ($self->{'symb'} eq '_evaluation') ||
349: ($self->{'symb'} eq '_discussion') ||
350: ($self->{'symb'} eq '_tutoring')) {
351: my $assess_title = ucfirst($self->{'symb'});
352: $assess_title =~ s/^_//;
353: push(@title,$assess_title);
354: } else {
355: push(@title,&Apache::lonnet::gettitle($self->{'symb'}));
356: }
357: # Look up the users identifying information
358: # Get the users information
359: my %userenv = &Apache::loncoursedata::GetUserName($self->{'name'},
360: $self->{'domain'});
361: my $name =
362: join(' ',@userenv{'firstname','middlename','lastname','generation'});
363: $name =~ s/\s+$//;
364: push (@title,$name);
365: push (@title,scalar(localtime(time)));
366: return @title;
367: }
368:
369: sub parent_link {
370: my $self = shift;
371: my $link .= '<p><a href="/adm/studentcalc?'.
372: 'sname='.$self->{'name'}.
373: '&sdomain='.$self->{'domain'}.'">'.
374: 'Student level sheet</a></p>'."\n";
375: return $link;
376: }
377:
378: sub outsheet_html {
379: my $self = shift;
380: my ($r) = @_;
381: ###################################
382: # Determine table structure
383: ###################################
384: my $importcolor = '#FFFFFF';
385: my $exportcolor = '#FFFFAA';
386: my $num_uneditable = 1;
387: my $num_left = 52-$num_uneditable;
388: my $tableheader =<<"END";
389: <table border="2">
390: <tr>
391: <th colspan="2" rowspan="2"><font size="+2">Assessment</font></th>
392: <td bgcolor="$importcolor" colspan="$num_uneditable"> </td>
393: <td colspan="$num_left">
394: <b><font size="+1">Calculations</font></b></td>
395: </tr><tr>
396: END
397: my $label_num = 0;
398: foreach (split(//,'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz')){
399: if ($label_num<$num_uneditable) {
400: $tableheader .= '<td bgcolor="'.$importcolor.'">';
401: } else {
402: $tableheader .= '<td>';
403: }
404: $tableheader .= "<b><font size=+1>$_</font></b></td>";
405: $label_num++;
406: }
407: $tableheader.="</tr>\n";
408: #
409: $r->print($tableheader);
410: #
411: # Print out template row
412: $r->print('<tr><td>Template</td><td> </td>'.
413: $self->html_template_row($num_uneditable,$importcolor).
414: "</tr>\n");
415: #
416: # Print out summary/export row
417: $r->print('<tr><td>Export</td><td>0</td>'.
418: $self->html_export_row($exportcolor)."</tr>\n");
419: #
420: # Prepare to output rows
421: $tableheader =<<"END";
422: <table border="2">
423: <tr><th>row</th><th>Item</th>
424: END
425: foreach (split(//,'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz')){
426: if ($label_num<$num_uneditable) {
427: $tableheader.='<th bgcolor="'.$importcolor.'">';
428: } else {
429: $tableheader.='<th>';
430: }
431: $tableheader.="<b><font size=+1>$_</font></b></th>";
432: }
433: #
434: my $num_output = 0;
435: foreach my $rownum (sort {$a <=> $b} ($self->rows())) {
436: if ($num_output++ % 50 == 0) {
437: $r->print("</table>\n".$tableheader);
438: }
439: $r->print('<tr><td>'.$rownum.'</td>'.
440: $self->assess_html_row($rownum,$importcolor)."</tr>\n");
441: }
442: $r->print("</table>\n");
443: return;
444: }
445:
446: sub assess_html_row {
447: my $self = shift();
448: my ($row,$importcolor) = @_;
449: my $parameter_name = $self->{'formulas'}->{'A'.$row};
450: my @rowdata = $self->get_row($row);
451: my $num_cols_output = 0;
452: my $row_html;
453: if (exists($nice_parameter_name{$parameter_name})) {
454: my $name = $nice_parameter_name{$parameter_name};
455: $name =~ s/ /\ /g;
456: $row_html .= '<td>'.$name.'<br />'.$parameter_name.'</td>';
457: } else {
458: $row_html .= '<td>'.$parameter_name.'</td>';
459: }
460: foreach my $cell (@rowdata) {
461: if ($num_cols_output < 1) {
462: $row_html .= '<td bgcolor="'.$importcolor.'">';
463: $row_html .= &Apache::Spreadsheet::html_uneditable_cell($cell,
464: '#FFDDDD');
465: } else {
466: $row_html .= '<td bgcolor="#EOFFDD">';
467: $row_html .= &Apache::Spreadsheet::html_editable_cell($cell,
468: '#E0FFDD',1);
469: }
470: $row_html .= '</td>';
471: $num_cols_output++;
472: }
473: return $row_html;
474: }
475:
476: sub csv_rows {
477: # writes the meat of the spreadsheet to an excel worksheet. Called
478: # by Spreadsheet::outsheet_excel;
479: my $self = shift;
480: my ($filehandle) = @_;
481: #
482: # Write a header row
483: $self->csv_output_row($filehandle,undef,
484: ('Parameter','Description','Value'));
485: #
486: # Write each row
487: foreach my $rownum (sort {$a <=> $b} ($self->rows())) {
488: my $parameter_name = $self->{'formulas'}->{'A'.$rownum};
489: my $description = '';
490: if (exists($nice_parameter_name{$parameter_name})) {
491: $description = $nice_parameter_name{$parameter_name};
492: }
493: $self->csv_output_row($filehandle,$rownum,
494: $parameter_name,$description);
495: }
496: return;
497: }
498:
499: sub excel_rows {
500: # writes the meat of the spreadsheet to an excel worksheet. Called
501: # by Spreadsheet::outsheet_excel;
502: my $self = shift;
503: my ($worksheet,$cols_output,$rows_output) = @_;
504: #
505: # Write a header row
506: $cols_output = 0;
507: foreach my $value ('Parameter','Description','Value') {
508: $worksheet->write($rows_output,$cols_output++,$value);
509: }
510: $rows_output++;
511: #
512: # Write each row
513: foreach my $rownum (sort {$a <=> $b} ($self->rows())) {
514: my $parameter_name = $self->{'formulas'}->{'A'.$rownum};
515: my $description = '';
516: if (exists($nice_parameter_name{$parameter_name})) {
517: $description = $nice_parameter_name{$parameter_name};
518: }
519: $self->excel_output_row($worksheet,$rownum,$rows_output++,
520: $parameter_name,$description);
521: }
522: return;
523: }
524:
525: sub compute {
526: my $self = shift;
527: my ($r) = @_;
528: my $connection = $r->connection();
529: if ($connection->aborted()) { $self->cleanup(); return; }
530: # $self->logthis('computing');
531: $self->initialize_safe_space();
532: #########################################
533: #########################################
534: ### ###
535: ### Retrieve the problem parameters ###
536: ### ###
537: #########################################
538: #########################################
539: my @Mandatory_parameters = ("stores_0_solved",
540: "stores_0_awarddetail",
541: "stores_0_awarded",
542: "timestamp",
543: "stores_0_tries",
544: "stores_0_award");
545: #
546: # Definitions
547: undef(%nice_parameter_name);
548: my %parameters; # holds underscored parameters by name
549: #
550: # Get the metadata fields and determine their proper names
551: my ($symap,$syid,$srcf)=split(/___/,$self->{'symb'});
552: my @Metadata = split(/\,/,&Apache::lonnet::metadata($srcf,'keys'));
553: foreach my $parm (@Mandatory_parameters,@Metadata) {
554: next if ($parm !~ /^(resource\.|stores|parameter)_/);
555: my $cleaned_name = $parm;
556: $cleaned_name =~ s/^resource\./stores_/;
557: $cleaned_name =~ s/\./_/g;
558: my $display = &Apache::lonnet::metadata($srcf,
559: $cleaned_name.'.display');
560: if (! $display) {
561: $display .= &Apache::lonnet::metadata($srcf,$cleaned_name.'.name');
562: }
563: $parameters{$cleaned_name}++;
564: $nice_parameter_name{$cleaned_name} = $display;
565: }
566: #
567: # Get the values of the metadata fields
568: if ($connection->aborted()) { $self->cleanup(); return; }
569: $self->ensure_current_parameter_caches();
570: if ($connection->aborted()) { $self->cleanup(); return; }
571: my $filename = $self->{'coursefilename'}.'_parms.db';
572: if (tie(%parmhash,'GDBM_File',
573: $self->{'coursefilename'}.'_parms.db',&GDBM_READER(),0640)) {
574: foreach my $parmname (keys(%parameters)) {
575: my $value = $self->parmval($parmname);
576: $parameters{$parmname} =$value;
577: }
578: untie(%parmhash);
579: } else {
580: $self->logthis('unable to tie '.$filename);
581: }
582: if ($connection->aborted()) { $self->cleanup(); return; }
583: #
584: # Clean out unnecessary parameters
585: foreach (keys(%parameters)) {
586: delete($parameters{$_}) if (! /(resource\.|stores_|parameter_)/);
587: }
588: #
589: # Get the students performance data
590: my %student_parameters =
591: &Apache::loncoursedata::get_current_state($self->{'name'},
592: $self->{'domain'},
593: $self->{'symb'},
594: $self->{'cid'});
595: while (my ($parm,$value) = each(%student_parameters)) {
596: $parm =~ s/^resource\./stores_/;
597: $parm =~ s/\./_/g;
598: $parameters{$parm} = $value;
599: }
600: #
601: # Set up the formulas and parameter values
602: my %f=$self->formulas();
603: my %c;
604: #
605: # Check for blackout requirements
606: if ((!exists($ENV{'request.role.adv'}) || !$ENV{'request.role.adv'})) {
607: while (my ($parm,$value) = each(%parameters)) {
608: last if ($self->blackout());
609: next if ($parm !~ /^(parameter_.*)_problemstatus$/);
610: next if ($parameters{$1.'_answerdate'}<time);
611: if (lc($value) eq 'no') {
612: # We must blackout this sheet
613: $self->blackout(1);
614: }
615: }
616: }
617: if ($connection->aborted()) { $self->cleanup(); return; }
618: #
619: # Move the parameters into the spreadsheet
620: if ($connection->aborted()) { $self->cleanup(); return; }
621: while (my ($parm,$value) = each(%parameters)) {
622: my $cell = 'A'.$self->get_row_number_from_key($parm);
623: $f{$cell} = $parm;
624: $value = '"'.$value.'"' if ($value =~/[^0-9.]/);
625: $c{$parm} = $value;
626: }
627: $self->formulas(\%f);
628: $self->constants(\%c);
629: if ($connection->aborted()) { $self->cleanup(); return; }
630: $self->calcsheet();
631: #
632: # Store export row in cache
633: my @exportarray = $self->exportrow();
634: $Exportrows{$self->{'symb'}}->{'time'} = time;
635: $Exportrows{$self->{'symb'}}->{$self->{'filename'}} = \@exportarray;
636: #
637: # Save the export data
638: $self->save_export_data();
639: $self->save() if ($self->need_to_save());
640: if ($connection->aborted()) { $self->cleanup(); return; }
641: return;
642: }
643:
644: ##
645: ## sett overrides Spreadsheet::sett
646: ##
647: sub sett {
648: my $self = shift;
649: my %t=();
650: #
651: # Deal with the template row by copying the template formulas into each
652: # row.
653: foreach my $col ($self->template_cells()) {
654: next if ($col=~/^A/);
655: foreach my $row ($self->rows()) {
656: # Get the name of this cell
657: my $cell=$col.$row;
658: # Grab the template declaration
659: $t{$cell}=$self->formula('template_'.$col);
660: # Replace '#' with the row number
661: $t{$cell}=~s/\#/$row/g;
662: # Replace '....' with ','
663: $t{$cell}=~s/\.\.+/\,/g;
664: # Replace 'A0' with the value from 'A0'
665: $t{$cell}=~s/(^|[^\"\'])([A-Za-z]\d+)/$1\$sheet_values\{\'$2\'\}/g;
666: # Replace parameters
667: $t{$cell}=~s/(^|[^\"\'])\[([^\]]+)\]/$1.$self->expandnamed($2)/ge;
668: }
669: }
670: #
671: # Deal with the cells which have formulas
672: while (my ($cell,$formula) = each(%{$self->{'formulas'}})) {
673: next if ($cell =~ /template_/);
674: if ($cell =~ /^A/ && $cell ne 'A0') {
675: if ($formula !~ /^\!/) {
676: $t{$cell}=$self->{'constants'}->{$formula};
677: }
678: } else {
679: $t{$cell}=$formula;
680: $t{$cell}=~s/\.\.+/\,/g;
681: $t{$cell}=~s/(^|[^\"\'])([A-Za-z]\d+)/$1\$sheet_values\{\'$2\'\}/g;
682: $t{$cell}=~s/(^|[^\"\'])\[([^\]]+)\]/$1.$self->expandnamed($2)/ge;
683: }
684: }
685: # Put %t into the safe space
686: %{$self->{'safe'}->varglob('t')}=%t;
687: }
688:
689:
690: ########################################################
691: ########################################################
692:
693: =pod
694:
695: =item &load_cached_export_rows()
696:
697: Retrieves and parsers the export rows of the assessment spreadsheets.
698: These rows are saved in the students directory in the format:
699:
700: sname:sdom:assesscalc:symb.time => time
701:
702: sname:sdom:assesscalc:symb => filename___=___Adata___;___Bdata___;___ ...
703:
704: =cut
705:
706: ########################################################
707: ########################################################
708: sub load_cached_export_rows {
709: undef(%Exportrows);
710: my @tmp = &Apache::lonnet::dump('nohist_calculatedsheets_'.
711: $ENV{'request.course.id'},
712: $current_domain,$current_name,undef);
713: if ($tmp[0]!~/^error/) {
714: my %tmp = @tmp;
715: my $default_filename = $ENV{'course.'.$ENV{'request.course.id'}.
716: '.spreadsheet_default_assesscalc'};
717: # We only got one key, so we will access it directly.
718: while (my ($key,$sheetdata) = each(%tmp)) {
719: my ($sname,$sdom,$sheettype,$symb) = split(':',$key);
720: if ($symb =~ /\.time$/) {
721: $symb =~ s/\.time$//;
722: $Exportrows{$symb}->{'time'} = $sheetdata;
723: } else {
724: $sheetdata =~ s/^(.*)___=___//;
725: my $filename = $1;
726: $filename = $default_filename if (! defined($filename));
727: my @Data = split('___;___',$sheetdata);
728: $Exportrows{$symb}->{$filename} = \@Data;
729: }
730: }
731: }
732: }
733:
734: #############################################
735: #############################################
736:
737: =pod
738:
739: =item &export_data
740:
741: Returns the export data associated with the spreadsheet. Computes the
742: spreadsheet only if necessary.
743:
744: =cut
745:
746: #############################################
747: #############################################
748: sub export_data {
749: my $self = shift;
750: my ($r) = @_;
751: my $connection = $r->connection();
752: my $symb = $self->{'symb'};
753: if (! exists($ENV{'request.role.adv'}) || ! $ENV{'request.role.adv'} ||
754: ! exists($Exportrows{$symb}) || ! defined($Exportrows{$symb}) ||
755: ! $self->check_expiration_time($Exportrows{$symb}->{'time'}) ||
756: ! exists($Exportrows{$symb}->{$self->{'filename'}}) ||
757: ! defined($Exportrows{$symb}->{$self->{'filename'}}) ||
758: ! ref($Exportrows{$symb}->{$self->{'filename'}})
759: ) {
760: $self->compute($r);
761: }
762: if ($connection->aborted()) { $self->cleanup(); return; }
763: my @Data = @{$Exportrows{$symb}->{$self->{'filename'}}};
764: if ($Data[0] =~ /^(.*)___=___/) {
765: $self->{'sheetname'} = $1;
766: $Data[0] =~ s/^(.*)___=___//;
767: }
768: for (my $i=0;$i<$#Data;$i++) {
769: $Data[$i]="'".$Data[$i]."'" if ($Data[$i]=~/\D/ && defined($Data[$i]));
770: }
771: return @Data;
772: }
773:
774: #############################################
775: #############################################
776:
777: =pod
778:
779: =item &save_export_data()
780:
781: Writes the export data for this spreadsheet to the students cache.
782:
783: =cut
784:
785: #############################################
786: #############################################
787: sub save_export_data {
788: my $self = shift;
789: return if ($self->temporary());
790: my $student = $self->{'name'}.':'.$self->{'domain'};
791: my $symb = $self->{'symb'};
792: if (! exists($Exportrows{$symb}) ||
793: ! exists($Exportrows{$symb}->{$self->{'filename'}})) {
794: return;
795: }
796: my $key = join(':',($self->{'name'},$self->{'domain'},'assesscalc',$symb));
797: my $timekey = $key.'.time';
798: my $newstore= join('___;___',@{$Exportrows{$symb}->{$self->{'filename'}}});
799: $newstore = $self->{'filename'}.'___=___'.$newstore;
800: my $result = &Apache::lonnet::put
801: ('nohist_calculatedsheets_'.$ENV{'request.course.id'},
802: { $key => $newstore,
803: $timekey => $Exportrows{$symb}->{'time'} },
804: $self->{'domain'},
805: $self->{'name'});
806:
807: return;
808: }
809:
810: 1;
811:
812: __END__
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