File:
[LON-CAPA] /
loncom /
interface /
spreadsheet /
Spreadsheet.pm
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1.15:
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Wed Jun 18 19:09:23 2003 UTC (21 years, 2 months ago) by
matthew
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Remove unused code. When the system tries to compute a spreadsheet
we first try to load the sheet from the class' directory. If the
sheet is not present we then load the system default for that level.
This allows the user to make changes to a spreadsheet and save it
with the same name as the system default (default_sheetlevel).
1: #
2: # $Id: Spreadsheet.pm,v 1.15 2003/06/18 19:09:23 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: Spreadsheet
34:
35: =head1 SYNOPSIS
36:
37: =head1 DESCRIPTION
38:
39: =over 4
40:
41: =cut
42:
43: ###################################################
44: ###################################################
45: ### Spreadsheet ###
46: ###################################################
47: ###################################################
48: package Apache::Spreadsheet;
49:
50: use strict;
51: use Apache::Constants qw(:common :http);
52: use Apache::lonnet;
53: use Safe;
54: use Safe::Hole;
55: use Opcode;
56: use HTML::Entities();
57: use HTML::TokeParser;
58: use Spreadsheet::WriteExcel;
59: use Time::HiRes;
60:
61: ##
62: ## Package Variables
63: ##
64: my %expiredates;
65:
66: my @UC_Columns = split(//,'ABCDEFGHIJKLMNOPQRSTUVWXYZ');
67: my @LC_Columns = split(//,'abcdefghijklmnopqrstuvwxyz');
68:
69: ######################################################
70:
71: =pod
72:
73: =item &new
74:
75: Returns a new spreadsheet object.
76:
77: =cut
78:
79: ######################################################
80: sub new {
81: my $this = shift;
82: my $class = ref($this) || $this;
83: my ($stype) = ($class =~ /Apache::(.*)$/);
84: #
85: my ($name,$domain,$filename,$usymb)=@_;
86: #
87: my $self = {
88: name => $name,
89: domain => $domain,
90: type => $stype,
91: symb => $usymb,
92: errorlog => '',
93: maxrow => '',
94: cid => $ENV{'request.course.id'},
95: cnum => $ENV{'course.'.$ENV{'request.course.id'}.'.num'},
96: cdom => $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
97: chome => $ENV{'course.'.$ENV{'request.course.id'}.'.home'},
98: coursedesc => $ENV{'course.'.$ENV{'request.course.id'}.'.description'},
99: coursefilename => $ENV{'request.course.fn'},
100: #
101: # Flags
102: temporary => 0, # true if this sheet has been modified but not saved
103: new_rows => 0, # true if this sheet has new rows
104: #
105: # blackout is used to determine if any data needs to be hidden from the
106: # student.
107: blackout => 0,
108: #
109: # Data storage
110: formulas => {},
111: constants => {},
112: rows => [],
113: row_source => {},
114: othersheets => [],
115: };
116: #
117: $self->{'uhome'} = &Apache::lonnet::homeserver($name,$domain);
118: #
119: bless($self,$class);
120: #
121: # Load in the spreadsheet definition
122: $self->filename($filename);
123: if (exists($ENV{'form.workcopy'}) &&
124: $self->{'type'} eq $ENV{'form.workcopy'}) {
125: $self->load_tmp();
126: } else {
127: $self->load();
128: }
129: return $self;
130: }
131:
132: ######################################################
133:
134: =pod
135:
136: =item &filename
137:
138: get or set the filename for a spreadsheet.
139:
140: =cut
141:
142: ######################################################
143: sub filename {
144: my $self = shift();
145: if (@_) {
146: my ($newfilename) = @_;
147: if (! defined($newfilename) || $newfilename eq 'Default' ||
148: $newfilename !~ /\w/ || $newfilename eq '') {
149: my $key = 'course.'.$self->{'cid'}.'.spreadsheet_default_'.
150: $self->{'type'};
151: if (exists($ENV{$key}) && $ENV{$key} ne '') {
152: $newfilename = $ENV{$key};
153: } else {
154: $newfilename = 'default_'.$self->{'type'};
155: }
156: }
157: if ($newfilename !~ /\w/ || $newfilename =~ /^\W*$/) {
158: $newfilename = 'default_'.$self->{'type'};
159: }
160: if ($newfilename !~ /^default\.$self->{'type'}$/ ) {
161: if ($newfilename !~ /_$self->{'type'}$/) {
162: $newfilename =~ s/[\s_]*$//;
163: $newfilename .= '_'.$self->{'type'};
164: }
165: }
166: $self->{'filename'} = $newfilename;
167: return;
168: }
169: return $self->{'filename'};
170: }
171:
172: ######################################################
173:
174: =pod
175:
176: =item &make_default()
177:
178: Make the current spreadsheet file the default for the course. Expires all the
179: default spreadsheets.......!
180:
181: =cut
182:
183: ######################################################
184: sub make_default {
185: my $self = shift();
186: my $result = &Apache::lonnet::put('environment',
187: {'spreadsheet_default_'.$self->{'type'} => $self->filename()},
188: $self->{'cdom'},$self->{'cnum'});
189: return $result if ($result ne 'ok');
190: my $symb = $self->{'symb'};
191: $symb = '' if (! defined($symb));
192: &Apache::lonnet::expirespread('','',$self->{'type'},$symb);
193: }
194:
195: ######################################################
196:
197: =pod
198:
199: =item &is_default()
200:
201: Returns 1 if the current spreadsheet is the default as specified in the
202: course environment. Returns 0 otherwise.
203:
204: =cut
205:
206: ######################################################
207: sub is_default {
208: my $self = shift;
209: # Check to find out if we are the default spreadsheet (filenames match)
210: my $default_filename = '';
211: my %tmphash = &Apache::lonnet::get('environment',
212: ['spreadsheet_default_'.
213: $self->{'type'}],
214: $self->{'cdom'},
215: $self->{'cnum'});
216: my ($tmp) = keys(%tmphash);
217: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
218: $default_filename = $tmphash{'spreadsheet_default_'.$self->{'type'}};
219: }
220: if ($default_filename =~ /^\s*$/) {
221: $default_filename = 'default_'.$self->{'type'};
222: }
223: return 1 if ($self->filename() eq $default_filename);
224: return 0;
225: }
226:
227: sub initialize {
228: # This method is here to remind you that it will be overridden by
229: # the descendents of the spreadsheet class.
230: }
231:
232: sub initialize_spreadsheet_package {
233: &load_spreadsheet_expirationdates();
234: &clear_spreadsheet_definition_cache();
235: }
236:
237: sub load_spreadsheet_expirationdates {
238: undef %expiredates;
239: my $cid=$ENV{'request.course.id'};
240: my @tmp = &Apache::lonnet::dump('nohist_expirationdates',
241: $ENV{'course.'.$cid.'.domain'},
242: $ENV{'course.'.$cid.'.num'});
243: if (lc($tmp[0]) !~ /^error/){
244: %expiredates = @tmp;
245: }
246: }
247:
248: sub check_expiration_time {
249: my $self = shift;
250: my ($time)=@_;
251: my ($key1,$key2,$key3,$key4);
252: $key1 = '::'.$self->{'type'}.':';
253: $key2 = $self->{'name'}.':'.$self->{'domain'}.':'.$self->{'type'}.':';
254: $key3 = $key2.$self->{'container'} if (defined($self->{'container'}));
255: $key4 = $key2.$self->{'usymb'} if (defined($self->{'usymb'}));
256: foreach my $key ($key1,$key2,$key3,$key4) {
257: next if (! defined($key));
258: if (exists($expiredates{$key}) &&$expiredates{$key} > $time) {
259: return 0;
260: }
261: }
262: return 1;
263: }
264:
265: ######################################################
266:
267: =pod
268:
269: =item &initialize_safe_space
270:
271: Returns the safe space required by a Spreadsheet object.
272:
273: =head 2 Safe Space Functions
274:
275: =over 4
276:
277: =cut
278:
279: ######################################################
280: sub initialize_safe_space {
281: my $self = shift;
282: my $safeeval = new Safe(shift);
283: my $safehole = new Safe::Hole;
284: $safeeval->permit("entereval");
285: $safeeval->permit(":base_math");
286: $safeeval->permit("sort");
287: $safeeval->deny(":base_io");
288: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
289: $safehole->wrap(\&mask,$safeeval,'&mask');
290: $safeeval->share('$@');
291: my $code=<<'ENDDEFS';
292: # ---------------------------------------------------- Inside of the safe space
293: #
294: # f: formulas
295: # t: intermediate format (variable references expanded)
296: # v: output values
297: # c: preloaded constants (A-column)
298: # rl: row label
299: # os: other spreadsheets (for student spreadsheet only)
300: undef %sheet_values; # Holds the (computed, final) values for the sheet
301: # This is only written to by &calc, the spreadsheet computation routine.
302: # It is read by many functions
303: undef %t; # Holds the values of the spreadsheet temporarily. Set in &sett,
304: # which does the translation of strings like C5 into the value in C5.
305: # Used in &calc - %t holds the values that are actually eval'd.
306: undef %f; # Holds the formulas for each cell. This is the users
307: # (spreadsheet authors) data for each cell.
308: undef %c; # Holds the constants for a sheet. In the assessment
309: # sheets, this is the A column. Used in &MINPARM, &MAXPARM, &expandnamed,
310: # &sett, and &constants. There is no &getconstants.
311: # &constants is called by &loadstudent, &loadcourse, &load assessment,
312: undef @os; # Holds the names of other spreadsheets - this is used to specify
313: # the spreadsheets that are available for the assessment sheet.
314: # Set by &setothersheets. &setothersheets is called by &handler. A
315: # related subroutine is &othersheets.
316: $errorlog = '';
317: #
318: $maxrow = 0;
319: $type = '';
320: #
321: # filename/reference of the sheet
322: $filename = '';
323: #
324: # user data
325: $name = '';
326: $uhome = '';
327: $domain = '';
328: #
329: # course data
330: $csec = '';
331: $chome= '';
332: $cnum = '';
333: $cdom = '';
334: $cid = '';
335: $coursefilename = '';
336: #
337: # symb
338: $usymb = '';
339: #
340: # error messages
341: $errormsg = '';
342: #
343: #-------------------------------------------------------
344:
345: =pod
346:
347: =item NUM(range)
348:
349: returns the number of items in the range.
350:
351: =cut
352:
353: #-------------------------------------------------------
354: sub NUM {
355: my $mask=&mask(@_);
356: my $num= $#{@{grep(/$mask/,keys(%sheet_values))}}+1;
357: return $num;
358: }
359:
360: #-------------------------------------------------------
361:
362: =pod
363:
364: =item BIN(low,high,lower,upper)
365:
366: =cut
367:
368: #-------------------------------------------------------
369: sub BIN {
370: my ($low,$high,$lower,$upper)=@_;
371: my $mask=&mask($lower,$upper);
372: my $num=0;
373: foreach (grep /$mask/,keys(%sheet_values)) {
374: if (($sheet_values{$_}>=$low) && ($sheet_values{$_}<=$high)) {
375: $num++;
376: }
377: }
378: return $num;
379: }
380:
381: #-------------------------------------------------------
382:
383: =pod
384:
385: =item SUM(range)
386:
387: returns the sum of items in the range.
388:
389: =cut
390:
391: #-------------------------------------------------------
392: sub SUM {
393: my $mask=&mask(@_);
394: my $sum=0;
395: foreach (grep /$mask/,keys(%sheet_values)) {
396: $sum+=$sheet_values{$_};
397: }
398: return $sum;
399: }
400:
401: #-------------------------------------------------------
402:
403: =pod
404:
405: =item MEAN(range)
406:
407: compute the average of the items in the range.
408:
409: =cut
410:
411: #-------------------------------------------------------
412: sub MEAN {
413: my $mask=&mask(@_);
414: my $sum=0;
415: my $num=0;
416: foreach (grep /$mask/,keys(%sheet_values)) {
417: $sum+=$sheet_values{$_};
418: $num++;
419: }
420: if ($num) {
421: return $sum/$num;
422: } else {
423: return undef;
424: }
425: }
426:
427: #-------------------------------------------------------
428:
429: =pod
430:
431: =item STDDEV(range)
432:
433: compute the standard deviation of the items in the range.
434:
435: =cut
436:
437: #-------------------------------------------------------
438: sub STDDEV {
439: my $mask=&mask(@_);
440: my $sum=0; my $num=0;
441: foreach (grep /$mask/,keys(%sheet_values)) {
442: $sum+=$sheet_values{$_};
443: $num++;
444: }
445: unless ($num>1) { return undef; }
446: my $mean=$sum/$num;
447: $sum=0;
448: foreach (grep /$mask/,keys(%sheet_values)) {
449: $sum+=($sheet_values{$_}-$mean)**2;
450: }
451: return sqrt($sum/($num-1));
452: }
453:
454: #-------------------------------------------------------
455:
456: =pod
457:
458: =item PROD(range)
459:
460: compute the product of the items in the range.
461:
462: =cut
463:
464: #-------------------------------------------------------
465: sub PROD {
466: my $mask=&mask(@_);
467: my $prod=1;
468: foreach (grep /$mask/,keys(%sheet_values)) {
469: $prod*=$sheet_values{$_};
470: }
471: return $prod;
472: }
473:
474: #-------------------------------------------------------
475:
476: =pod
477:
478: =item MAX(range)
479:
480: compute the maximum of the items in the range.
481:
482: =cut
483:
484: #-------------------------------------------------------
485: sub MAX {
486: my $mask=&mask(@_);
487: my $max='-';
488: foreach (grep /$mask/,keys(%sheet_values)) {
489: unless ($max) { $max=$sheet_values{$_}; }
490: if (($sheet_values{$_}>$max) || ($max eq '-')) {
491: $max=$sheet_values{$_};
492: }
493: }
494: return $max;
495: }
496:
497: #-------------------------------------------------------
498:
499: =pod
500:
501: =item MIN(range)
502:
503: compute the minimum of the items in the range.
504:
505: =cut
506:
507: #-------------------------------------------------------
508: sub MIN {
509: my $mask=&mask(@_);
510: my $min='-';
511: foreach (grep /$mask/,keys(%sheet_values)) {
512: unless ($max) { $max=$sheet_values{$_}; }
513: if (($sheet_values{$_}<$min) || ($min eq '-')) {
514: $min=$sheet_values{$_};
515: }
516: }
517: return $min;
518: }
519:
520: #-------------------------------------------------------
521:
522: =pod
523:
524: =item SUMMAX(num,lower,upper)
525:
526: compute the sum of the largest 'num' items in the range from
527: 'lower' to 'upper'
528:
529: =cut
530:
531: #-------------------------------------------------------
532: sub SUMMAX {
533: my ($num,$lower,$upper)=@_;
534: my $mask=&mask($lower,$upper);
535: my @inside=();
536: foreach (grep /$mask/,keys(%sheet_values)) {
537: push (@inside,$sheet_values{$_});
538: }
539: @inside=sort(@inside);
540: my $sum=0; my $i;
541: for ($i=$#inside;(($i>$#inside-$num) && ($i>=0));$i--) {
542: $sum+=$inside[$i];
543: }
544: return $sum;
545: }
546:
547: #-------------------------------------------------------
548:
549: =pod
550:
551: =item SUMMIN(num,lower,upper)
552:
553: compute the sum of the smallest 'num' items in the range from
554: 'lower' to 'upper'
555:
556: =cut
557:
558: #-------------------------------------------------------
559: sub SUMMIN {
560: my ($num,$lower,$upper)=@_;
561: my $mask=&mask($lower,$upper);
562: my @inside=();
563: foreach (grep /$mask/,keys(%sheet_values)) {
564: $inside[$#inside+1]=$sheet_values{$_};
565: }
566: @inside=sort(@inside);
567: my $sum=0; my $i;
568: for ($i=0;(($i<$num) && ($i<=$#inside));$i++) {
569: $sum+=$inside[$i];
570: }
571: return $sum;
572: }
573:
574: #-------------------------------------------------------
575:
576: =pod
577:
578: =item MINPARM(parametername)
579:
580: Returns the minimum value of the parameters matching the parametername.
581: parametername should be a string such as 'duedate'.
582:
583: =cut
584:
585: #-------------------------------------------------------
586: sub MINPARM {
587: my ($expression) = @_;
588: my $min = undef;
589: study($expression);
590: foreach $parameter (keys(%c)) {
591: next if ($parameter !~ /$expression/);
592: if ((! defined($min)) || ($min > $c{$parameter})) {
593: $min = $c{$parameter}
594: }
595: }
596: return $min;
597: }
598:
599: #-------------------------------------------------------
600:
601: =pod
602:
603: =item MAXPARM(parametername)
604:
605: Returns the maximum value of the parameters matching the input parameter name.
606: parametername should be a string such as 'duedate'.
607:
608: =cut
609:
610: #-------------------------------------------------------
611: sub MAXPARM {
612: my ($expression) = @_;
613: my $max = undef;
614: study($expression);
615: foreach $parameter (keys(%c)) {
616: next if ($parameter !~ /$expression/);
617: if ((! defined($min)) || ($max < $c{$parameter})) {
618: $max = $c{$parameter}
619: }
620: }
621: return $max;
622: }
623:
624:
625: sub calc {
626: %sheet_values = %t;
627: my $notfinished = 1;
628: my $lastcalc = '';
629: my $depth = 0;
630: while ($notfinished) {
631: $notfinished=0;
632: while (my ($cell,$value) = each(%t)) {
633: my $old=$sheet_values{$cell};
634: $sheet_values{$cell}=eval $value;
635: # $errorlog .= $cell.' = '.$old.'->'.$sheet_values{$cell}."\n";
636: if ($@) {
637: undef %sheet_values;
638: return $cell.': '.$@;
639: }
640: if ($sheet_values{$cell} ne $old) {
641: $notfinished=1;
642: $lastcalc=$cell;
643: }
644: }
645: # $errorlog.="------------------------------------------------";
646:
647: $depth++;
648: if ($depth>100) {
649: undef %sheet_values;
650: return $lastcalc.': Maximum calculation depth exceeded';
651: }
652: }
653: return '';
654: }
655:
656: # ------------------------------------------- End of "Inside of the safe space"
657: ENDDEFS
658: $safeeval->reval($code);
659: $self->{'safe'} = $safeeval;
660: $self->{'root'} = $self->{'safe'}->root();
661: #
662: # Place some of the %$self items into the safe space except the safe space
663: # itself
664: my $initstring = '';
665: foreach (qw/name domain type usymb cid csec coursefilename
666: cnum cdom chome uhome/) {
667: $initstring.= qq{\$$_="$self->{$_}";};
668: }
669: $self->{'safe'}->reval($initstring);
670: return $self;
671: }
672: ######################################################
673:
674: =pod
675:
676: =back
677:
678: =cut
679:
680: ######################################################
681:
682:
683: ######################################################
684:
685:
686: ######################################################
687: {
688:
689: my %memoizer;
690:
691: sub mask {
692: my ($lower,$upper)=@_;
693: my $key = $lower.'_'.$upper;
694: if (exists($memoizer{$key})) {
695: return $memoizer{$key};
696: }
697: $upper = $lower if (! defined($upper));
698: #
699: my ($la,$ld) = ($lower=~/([A-Za-z]|\*)(\d+|\*)/);
700: my ($ua,$ud) = ($upper=~/([A-Za-z]|\*)(\d+|\*)/);
701: #
702: my $alpha='';
703: my $num='';
704: #
705: if (($la eq '*') || ($ua eq '*')) {
706: $alpha='[A-Za-z]';
707: } else {
708: if (($la=~/[A-Z]/) && ($ua=~/[A-Z]/) ||
709: ($la=~/[a-z]/) && ($ua=~/[a-z]/)) {
710: $alpha='['.$la.'-'.$ua.']';
711: } else {
712: $alpha='['.$la.'-Za-'.$ua.']';
713: }
714: }
715: if (($ld eq '*') || ($ud eq '*')) {
716: $num='\d+';
717: } else {
718: if (length($ld)!=length($ud)) {
719: $num.='(';
720: foreach ($ld=~m/\d/g) {
721: $num.='['.$_.'-9]';
722: }
723: if (length($ud)-length($ld)>1) {
724: $num.='|\d{'.(length($ld)+1).','.(length($ud)-1).'}';
725: }
726: $num.='|';
727: foreach ($ud=~m/\d/g) {
728: $num.='[0-'.$_.']';
729: }
730: $num.=')';
731: } else {
732: my @lda=($ld=~m/\d/g);
733: my @uda=($ud=~m/\d/g);
734: my $i;
735: my $j=0;
736: my $notdone=1;
737: for ($i=0;($i<=$#lda)&&($notdone);$i++) {
738: if ($lda[$i]==$uda[$i]) {
739: $num.=$lda[$i];
740: $j=$i;
741: } else {
742: $notdone=0;
743: }
744: }
745: if ($j<$#lda-1) {
746: $num.='('.$lda[$j+1];
747: for ($i=$j+2;$i<=$#lda;$i++) {
748: $num.='['.$lda[$i].'-9]';
749: }
750: if ($uda[$j+1]-$lda[$j+1]>1) {
751: $num.='|['.($lda[$j+1]+1).'-'.($uda[$j+1]-1).']\d{'.
752: ($#lda-$j-1).'}';
753: }
754: $num.='|'.$uda[$j+1];
755: for ($i=$j+2;$i<=$#uda;$i++) {
756: $num.='[0-'.$uda[$i].']';
757: }
758: $num.=')';
759: } else {
760: if ($lda[-1]!=$uda[-1]) {
761: $num.='['.$lda[-1].'-'.$uda[-1].']';
762: }
763: }
764: }
765: }
766: my $expression ='^'.$alpha.$num."\$";
767: $memoizer{$key} = $expression;
768: return $expression;
769: }
770:
771: }
772:
773: ##
774: ## sub add_hash_to_safe {} # spreadsheet, would like to destroy
775: ##
776:
777: #
778: # expandnamed used to reside in the safe space
779: #
780: sub expandnamed {
781: my $self = shift;
782: my $expression=shift;
783: if ($expression=~/^\&/) {
784: my ($func,$var,$formula)=($expression=~/^\&(\w+)\(([^\;]+)\;(.*)\)/);
785: my @vars=split(/\W+/,$formula);
786: my %values=();
787: foreach my $varname ( @vars ) {
788: if ($varname=~/\D/) {
789: $formula=~s/$varname/'$c{\''.$varname.'\'}'/ge;
790: $varname=~s/$var/\([\\w:\\- ]\+\)/g;
791: foreach (keys(%{$self->{'constants'}})) {
792: if ($_=~/$varname/) {
793: $values{$1}=1;
794: }
795: }
796: }
797: }
798: if ($func eq 'EXPANDSUM') {
799: my $result='';
800: foreach (keys(%values)) {
801: my $thissum=$formula;
802: $thissum=~s/$var/$_/g;
803: $result.=$thissum.'+';
804: }
805: $result=~s/\+$//;
806: return $result;
807: } else {
808: return 0;
809: }
810: } else {
811: # it is not a function, so it is a parameter name
812: # We should do the following:
813: # 1. Take the list of parameter names
814: # 2. look through the list for ones that match the parameter we want
815: # 3. If there are no collisions, return the one that matches
816: # 4. If there is a collision, return 'bad parameter name error'
817: my $returnvalue = '';
818: my @matches = ();
819: my @values = ();
820: $#matches = -1;
821: study $expression;
822: while (my($parameter,$value) = each(%{$self->{'constants'}})) {
823: next if ($parameter !~ /$expression/);
824: push(@matches,$parameter);
825: push(@values,$value);
826: }
827: if (scalar(@matches) == 0) {
828: $returnvalue = '""';#'"unmatched parameter: '.$parameter.'"';
829: } elsif (scalar(@matches) == 1) {
830: # why do we not do this lookup here, instead of delaying it?
831: $returnvalue = $values[0];
832: } elsif (scalar(@matches) > 0) {
833: # more than one match. Look for a concise one
834: $returnvalue = "'non-unique parameter name : $expression'";
835: for (my $i=0; $i<=$#matches;$i++) {
836: if ($matches[$i] =~ /^$expression$/) {
837: # why do we not do this lookup here?
838: $returnvalue = $values[$i];
839: }
840: }
841: } else {
842: # There was a negative number of matches, which indicates
843: # something is wrong with reality. Better warn the user.
844: $returnvalue = '"bizzare parameter: '.$expression.'"';
845: }
846: return $returnvalue;
847: }
848: }
849:
850: sub sett {
851: my $self = shift;
852: my %t=();
853: #
854: # Deal with the template row
855: foreach my $col ($self->template_cells()) {
856: next if ($col=~/^[A-Z]/);
857: foreach my $row ($self->rows()) {
858: # Get the name of this cell
859: my $cell=$col.$row;
860: # Grab the template declaration
861: $t{$cell}=$self->formula('template_'.$col);
862: # Replace '#' with the row number
863: $t{$cell}=~s/\#/$row/g;
864: # Replace '....' with ','
865: $t{$cell}=~s/\.\.+/\,/g;
866: # Replace 'A0' with the value from 'A0'
867: $t{$cell}=~s/(^|[^\"\'])([A-Za-z]\d+)/$1\$sheet_values\{\'$2\'\}/g;
868: # Replace parameters
869: $t{$cell}=~s/(^|[^\"\'])\[([^\]]+)\]/$1.$self->expandnamed($2)/ge;
870: }
871: }
872: #
873: # Deal with the normal cells
874: while (my($cell,$formula) = each(%{$self->{'formulas'}})) {
875: next if ($_=~/^template\_/);
876: my ($col,$row) = ($cell =~ /^([A-z])(\d+)$/);
877: if ($row eq '0') {
878: $t{$cell}=$formula;
879: $t{$cell}=~s/\.\.+/\,/g;
880: $t{$cell}=~s/(^|[^\"\'])([A-Za-z]\d+)/$1\$sheet_values\{\'$2\'\}/g;
881: $t{$cell}=~s/(^|[^\"\'])\[([^\]]+)\]/$1.$self->expandnamed($2)/ge;
882: } elsif ( $col =~ /^[A-Z]$/ ) {
883: if ($formula !~ /^\!/ && exists($self->{'constants'}->{$cell})) {
884: my $data = $self->{'constants'}->{$cell};
885: $t{$cell} = $data;
886: }
887: } else { # $row > 1 and $col =~ /[a-z]
888: $t{$cell}=$formula;
889: $t{$cell}=~s/\.\.+/\,/g;
890: $t{$cell}=~s/(^|[^\"\'])([A-Za-z]\d+)/$1\$sheet_values\{\'$2\'\}/g;
891: $t{$cell}=~s/(^|[^\"\'])\[([^\]]+)\]/$1.$self->expandnamed($2)/ge;
892: }
893: }
894: %{$self->{'safe'}->varglob('t')}=%t;
895: }
896:
897: ##
898: ## sync_safe_space: Called by calcsheet to make sure all the data we
899: # need to calculate is placed into the safe space
900: ##
901: sub sync_safe_space {
902: my $self = shift;
903: # Inside the safe space 'formulas' has a diabolical alter-ego named 'f'.
904: %{$self->{'safe'}->varglob('f')}=%{$self->{'formulas'}};
905: # 'constants' leads a peaceful hidden life of 'c'.
906: %{$self->{'safe'}->varglob('c')}=%{$self->{'constants'}};
907: # 'othersheets' hides as 'os', a disguise few can penetrate.
908: @{$self->{'safe'}->varglob('os')}=@{$self->{'othersheets'}};
909: }
910:
911: ##
912: ## Retrieve the error log from the safe space (used for debugging)
913: ##
914: sub get_errorlog {
915: my $self = shift;
916: $self->{'errorlog'} = $ { $self->{'safe'}->varglob('errorlog') };
917: return $self->{'errorlog'};
918: }
919:
920: ##
921: ## Clear the error log inside the safe space
922: ##
923: sub clear_errorlog {
924: my $self = shift;
925: $ {$self->{'safe'}->varglob('errorlog')} = '';
926: $self->{'errorlog'} = '';
927: }
928:
929: ##
930: ## constants: either set or get the constants
931: ##
932: sub constants {
933: my $self=shift;
934: my ($constants) = @_;
935: if (defined($constants)) {
936: if (! ref($constants)) {
937: my %tmp = @_;
938: $constants = \%tmp;
939: }
940: $self->{'constants'} = $constants;
941: return;
942: } else {
943: return %{$self->{'constants'}};
944: }
945: }
946:
947: ##
948: ## formulas: either set or get the formulas
949: ##
950: sub formulas {
951: my $self=shift;
952: my ($formulas) = @_;
953: if (defined($formulas)) {
954: if (! ref($formulas)) {
955: my %tmp = @_;
956: $formulas = \%tmp;
957: }
958: $self->{'formulas'} = $formulas;
959: $self->{'rows'} = [];
960: $self->{'template_cells'} = [];
961: return;
962: } else {
963: return %{$self->{'formulas'}};
964: }
965: }
966:
967: sub set_formula {
968: my $self = shift;
969: my ($cell,$formula) = @_;
970: $self->{'formulas'}->{$cell}=$formula;
971: return;
972: }
973:
974: ##
975: ## formulas_keys: Return the keys to the formulas hash.
976: ##
977: sub formulas_keys {
978: my $self = shift;
979: my @keys = keys(%{$self->{'formulas'}});
980: return keys(%{$self->{'formulas'}});
981: }
982:
983: ##
984: ## formula: Return the formula for a given cell in the spreadsheet
985: ## returns '' if the cell does not have a formula or does not exist
986: ##
987: sub formula {
988: my $self = shift;
989: my $cell = shift;
990: if (defined($cell) && exists($self->{'formulas'}->{$cell})) {
991: return $self->{'formulas'}->{$cell};
992: }
993: return '';
994: }
995:
996: ##
997: ## logthis: write the input to lonnet.log
998: ##
999: sub logthis {
1000: my $self = shift;
1001: my $message = shift;
1002: &Apache::lonnet::logthis($self->{'type'}.':'.
1003: $self->{'name'}.':'.$self->{'domain'}.':'.
1004: $message);
1005: return;
1006: }
1007:
1008: ##
1009: ## dump_formulas_to_log: makes lonnet.log huge...
1010: ##
1011: sub dump_formulas_to_log {
1012: my $self =shift;
1013: $self->logthis("Spreadsheet formulas");
1014: $self->logthis("--------------------------------------------------------");
1015: while (my ($cell, $formula) = each(%{$self->{'formulas'}})) {
1016: $self->logthis(' '.$cell.' = '.$formula);
1017: }
1018: $self->logthis("--------------------------------------------------------");}
1019:
1020: ##
1021: ## value: returns the computed value of a particular cell
1022: ##
1023: sub value {
1024: my $self = shift;
1025: my $cell = shift;
1026: if (defined($cell) && exists($self->{'values'}->{$cell})) {
1027: return $self->{'values'}->{$cell};
1028: }
1029: return '';
1030: }
1031:
1032: ##
1033: ## dump_values_to_log: makes lonnet.log huge...
1034: ##
1035: sub dump_values_to_log {
1036: my $self =shift;
1037: $self->logthis("Spreadsheet Values");
1038: $self->logthis("------------------------------------------------------");
1039: while (my ($cell, $value) = each(%{$self->{'values'}})) {
1040: $self->logthis(' '.$cell.' = '.$value);
1041: }
1042: $self->logthis("------------------------------------------------------");
1043: }
1044:
1045: ##
1046: ## Yet another debugging function
1047: ##
1048: sub dump_hash_to_log {
1049: my $self= shift();
1050: my %tmp = @_;
1051: if (@_<2) {
1052: %tmp = %{$_[0]};
1053: }
1054: $self->logthis('---------------------------- (begin hash dump)');
1055: while (my ($key,$val) = each (%tmp)) {
1056: $self->logthis(' '.$key.' = '.$val.':');
1057: }
1058: $self->logthis('---------------------------- (finished hash dump)');
1059: }
1060:
1061: ##
1062: ## rebuild_stats: rebuilds the rows and template_cells arrays
1063: ##
1064: sub rebuild_stats {
1065: my $self = shift;
1066: $self->{'rows'}=[];
1067: $self->{'template_cells'}=[];
1068: while (my ($cell,$formula) = each(%{$self->{'formulas'}})) {
1069: push(@{$self->{'rows'}},$1) if ($cell =~ /^A(\d+)/ && $1 != 0);
1070: push(@{$self->{'template_cells'}},$1) if ($cell =~ /^template_(\w+)/);
1071: }
1072: return;
1073: }
1074:
1075: ##
1076: ## template_cells returns a list of the cells defined in the template row
1077: ##
1078: sub template_cells {
1079: my $self = shift;
1080: $self->rebuild_stats() if (! defined($self->{'template_cells'}) ||
1081: ! @{$self->{'template_cells'}});
1082: return @{$self->{'template_cells'}};
1083: }
1084:
1085: ##
1086: ## Sigh....
1087: ##
1088: sub setothersheets {
1089: my $self = shift;
1090: my @othersheets = @_;
1091: $self->{'othersheets'} = \@othersheets;
1092: }
1093:
1094: ##
1095: ## rows returns a list of the names of cells defined in the A column
1096: ##
1097: sub rows {
1098: my $self = shift;
1099: $self->rebuild_stats() if (!@{$self->{'rows'}});
1100: return @{$self->{'rows'}};
1101: }
1102:
1103: #
1104: # calcsheet: makes all the calls to compute the spreadsheet.
1105: #
1106: sub calcsheet {
1107: my $self = shift;
1108: $self->sync_safe_space();
1109: $self->clear_errorlog();
1110: $self->sett();
1111: my $result = $self->{'safe'}->reval('&calc();');
1112: # $self->logthis($self->get_errorlog());
1113: %{$self->{'values'}} = %{$self->{'safe'}->varglob('sheet_values')};
1114: # $self->logthis($self->get_errorlog());
1115: return $result;
1116: }
1117:
1118: ###########################################################
1119: ##
1120: ## Output Helpers
1121: ##
1122: ###########################################################
1123: sub display {
1124: my $self = shift;
1125: my ($r) = @_;
1126: $self->compute($r);
1127: my $outputmode = 'html';
1128: if ($ENV{'form.output_format'} =~ /^(html|excel|csv)$/) {
1129: $outputmode = $ENV{'form.output_format'};
1130: }
1131: if ($outputmode eq 'html') {
1132: $self->outsheet_html($r);
1133: } elsif ($outputmode eq 'excel') {
1134: $self->outsheet_excel($r);
1135: } elsif ($outputmode eq 'csv') {
1136: $self->outsheet_csv($r);
1137: }
1138: return;
1139: }
1140:
1141: ############################################
1142: ## HTML output routines ##
1143: ############################################
1144: sub html_export_row {
1145: my $self = shift();
1146: my $allowed = &Apache::lonnet::allowed('mgr',$ENV{'request.course.id'});
1147: my $row_html;
1148: my @rowdata = $self->get_row(0);
1149: foreach my $cell (@rowdata) {
1150: if ($cell->{'name'} =~ /^[A-Z]/) {
1151: $row_html .= '<td bgcolor="#CCCCFF">'.
1152: &html_editable_cell($cell,'#CCCCFF',$allowed).'</td>';
1153: } else {
1154: $row_html .= '<td bgcolor="#DDCCFF">'.
1155: &html_editable_cell($cell,'#DDCCFF',$allowed).'</td>';
1156: }
1157: }
1158: return $row_html;
1159: }
1160:
1161: sub html_template_row {
1162: my $self = shift();
1163: my $allowed = &Apache::lonnet::allowed('mgr',$ENV{'request.course.id'});
1164: my ($num_uneditable) = @_;
1165: my $row_html;
1166: my @rowdata = $self->get_template_row();
1167: my $count = 0;
1168: for (my $i = 0; $i<=$#rowdata; $i++) {
1169: my $cell = $rowdata[$i];
1170: if ($i < $num_uneditable) {
1171: $row_html .= '<td bgcolor="#FFDDDD">'.
1172: &html_uneditable_cell($cell,'#FFDDDD',$allowed).'</td>';
1173: } else {
1174: $row_html .= '<td bgcolor="#EOFFDD">'.
1175: &html_editable_cell($cell,'#EOFFDD',$allowed).'</td>';
1176: }
1177: }
1178: return $row_html;
1179: }
1180:
1181: sub html_editable_cell {
1182: my ($cell,$bgcolor,$allowed) = @_;
1183: my $result;
1184: my ($name,$formula,$value);
1185: if (defined($cell)) {
1186: $name = $cell->{'name'};
1187: $formula = $cell->{'formula'};
1188: $value = $cell->{'value'};
1189: }
1190: $name = '' if (! defined($name));
1191: $formula = '' if (! defined($formula));
1192: if (! defined($value)) {
1193: $value = '<font color="'.$bgcolor.'">#</font>';
1194: if ($formula ne '') {
1195: $value = '<i>undefined value</i>';
1196: }
1197: } elsif ($value =~ /^\s*$/ ) {
1198: $value = '<font color="'.$bgcolor.'">#</font>';
1199: } else {
1200: $value = &HTML::Entities::encode($value) if ($value !~/ /);
1201: }
1202: return $value if (! $allowed);
1203: # Make the formula safe for outputting
1204: $formula =~ s/\'/\"/g;
1205: # The formula will be parsed by the browser twice before being
1206: # displayed to the user for editing.
1207: $formula = &HTML::Entities::encode(&HTML::Entities::encode($formula));
1208: # Escape newlines so they make it into the edit window
1209: $formula =~ s/\n/\\n/gs;
1210: # Glue everything together
1211: $result .= "<a href=\"javascript:celledit(\'".
1212: $name."','".$formula."');\">".$value."</a>";
1213: return $result;
1214: }
1215:
1216: sub html_uneditable_cell {
1217: my ($cell,$bgcolor) = @_;
1218: my $value = (defined($cell) ? $cell->{'value'} : '');
1219: $value = &HTML::Entities::encode($value) if ($value !~/ /);
1220: return ' '.$value.' ';
1221: }
1222:
1223: sub html_row {
1224: my $self = shift();
1225: my ($num_uneditable,$row) = @_;
1226: my $allowed = &Apache::lonnet::allowed('mgr',$ENV{'request.course.id'});
1227: my @rowdata = $self->get_row($row);
1228: my $num_cols_output = 0;
1229: my $row_html;
1230: foreach my $cell (@rowdata) {
1231: if ($num_cols_output++ < $num_uneditable) {
1232: $row_html .= '<td bgcolor="#FFDDDD">';
1233: $row_html .= &html_uneditable_cell($cell,'#FFDDDD');
1234: } else {
1235: $row_html .= '<td bgcolor="#EOFFDD">';
1236: $row_html .= &html_editable_cell($cell,'#E0FFDD',$allowed);
1237: }
1238: $row_html .= '</td>';
1239: }
1240: return $row_html;
1241: }
1242:
1243: sub html_header {
1244: my $self = shift;
1245: return '' if (! $ENV{'request.role.adv'});
1246: return "<table>\n".
1247: '<tr><th align="center">Output Format</th><tr>'."\n".
1248: '<tr><td>'.&output_selector()."</td></tr>\n".
1249: "</table>\n";
1250: }
1251:
1252: sub output_selector {
1253: my $output_selector = '<select name="output_format" size="3">'."\n";
1254: my $default = 'html';
1255: if (exists($ENV{'form.output_format'})) {
1256: $default = $ENV{'form.output_format'}
1257: } else {
1258: $ENV{'form.output_format'} = $default;
1259: }
1260: foreach (['html','HTML'],
1261: ['excel','Excel'],
1262: ['csv','Comma Seperated Values']) {
1263: my ($name,$description) = @{$_};
1264: $output_selector.=qq{<option value="$name"};
1265: if ($name eq $default) {
1266: $output_selector .= ' selected';
1267: }
1268: $output_selector .= ">$description</option>\n";
1269: }
1270: $output_selector .= "</select>\n";
1271: return $output_selector;
1272: }
1273:
1274: ################################################
1275: ## Excel output routines ##
1276: ################################################
1277: sub excel_output_row {
1278: my $self = shift;
1279: my ($worksheet,$rownum,$rows_output,@prepend) = @_;
1280: my $cols_output = 0;
1281: #
1282: my @rowdata = $self->get_row($rownum);
1283: foreach my $cell (@prepend,@rowdata) {
1284: my $value = $cell;
1285: $value = $cell->{'value'} if (ref($value));
1286: $value =~ s/\ / /gi;
1287: $worksheet->write($rows_output,$cols_output++,$value);
1288: }
1289: return;
1290: }
1291:
1292: sub create_excel_spreadsheet {
1293: my $self = shift;
1294: my ($r) = @_;
1295: my $filename = '/prtspool/'.
1296: $ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'.
1297: time.'_'.rand(1000000000).'.xls';
1298: my $workbook = Spreadsheet::WriteExcel->new('/home/httpd'.$filename);
1299: if (! defined($workbook)) {
1300: $r->log_error("Error creating excel spreadsheet $filename: $!");
1301: $r->print("Problems creating new Excel file. ".
1302: "This error has been logged. ".
1303: "Please alert your LON-CAPA administrator");
1304: return undef;
1305: }
1306: #
1307: # The excel spreadsheet stores temporary data in files, then put them
1308: # together. If needed we should be able to disable this (memory only).
1309: # The temporary directory must be specified before calling 'addworksheet'.
1310: # File::Temp is used to determine the temporary directory.
1311: $workbook->set_tempdir('/home/httpd/perl/tmp');
1312: #
1313: # Determine the name to give the worksheet
1314: return ($workbook,$filename);
1315: }
1316:
1317: sub outsheet_excel {
1318: my $self = shift;
1319: my ($r) = @_;
1320: $r->print("<h2>Preparing Excel Spreadsheet</h2>");
1321: #
1322: # Create excel worksheet
1323: my ($workbook,$filename) = $self->create_excel_spreadsheet($r);
1324: return if (! defined($workbook));
1325: #
1326: # Create main worksheet
1327: my $worksheet = $workbook->addworksheet('main');
1328: my $rows_output = 0;
1329: my $cols_output = 0;
1330: #
1331: # Write excel header
1332: foreach my $value ($self->get_title()) {
1333: $cols_output = 0;
1334: $worksheet->write($rows_output++,$cols_output,$value);
1335: }
1336: $rows_output++; # skip a line
1337: #
1338: # Write summary/export row
1339: $cols_output = 0;
1340: $self->excel_output_row($worksheet,0,$rows_output++,'Summary');
1341: $rows_output++; # skip a line
1342: #
1343: $self->excel_rows($worksheet,$cols_output,$rows_output);
1344: #
1345: #
1346: # Close the excel file
1347: $workbook->close();
1348: #
1349: # Write a link to allow them to download it
1350: $r->print('<br />'.
1351: '<a href="'.$filename.'">Your Excel spreadsheet.</a>'."\n");
1352: return;
1353: }
1354:
1355: #################################
1356: ## CSV output routines ##
1357: #################################
1358: sub outsheet_csv {
1359: my $self = shift;
1360: my ($r) = @_;
1361: my $csvdata = '';
1362: my @Values;
1363: #
1364: # Open the csv file
1365: my $filename = '/prtspool/'.
1366: $ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'.
1367: time.'_'.rand(1000000000).'.csv';
1368: my $file;
1369: unless ($file = Apache::File->new('>'.'/home/httpd'.$filename)) {
1370: $r->log_error("Couldn't open $filename for output $!");
1371: $r->print("Problems occured in writing the csv file. ".
1372: "This error has been logged. ".
1373: "Please alert your LON-CAPA administrator.");
1374: $r->print("<pre>\n".$csvdata."</pre>\n");
1375: return 0;
1376: }
1377: #
1378: # Output the title information
1379: foreach my $value ($self->get_title()) {
1380: print $file "'".&Apache::loncommon::csv_translate($value)."'\n";
1381: }
1382: #
1383: # Output the body of the spreadsheet
1384: $self->csv_rows($file);
1385: #
1386: # Close the csv file
1387: close($file);
1388: $r->print('<br /><br />'.
1389: '<a href="'.$filename.'">Your CSV spreadsheet.</a>'."\n");
1390: #
1391: return 1;
1392: }
1393:
1394: sub csv_output_row {
1395: my $self = shift;
1396: my ($filehandle,$rownum,@prepend) = @_;
1397: #
1398: my @rowdata = ();
1399: if (defined($rownum)) {
1400: @rowdata = $self->get_row($rownum);
1401: }
1402: my @output = ();
1403: foreach my $cell (@prepend,@rowdata) {
1404: my $value = $cell;
1405: $value = $cell->{'value'} if (ref($value));
1406: $value =~ s/\ / /gi;
1407: $value = "'".$value."'";
1408: push (@output,$value);
1409: }
1410: print $filehandle join(',',@output )."\n";
1411: return;
1412: }
1413:
1414: ############################################
1415: ## XML output routines ##
1416: ############################################
1417: sub outsheet_xml {
1418: my $self = shift;
1419: my ($r) = @_;
1420: ## Someday XML
1421: ## Will be rendered for the user
1422: ## But not on this day
1423: my $Str = '<spreadsheet type="'.$self->{'type'}.'">'."\n";
1424: while (my ($cell,$formula) = each(%{$self->{'formulas'}})) {
1425: if ($cell =~ /^template_(\d+)/) {
1426: my $col = $1;
1427: $Str .= '<template col="'.$col.'">'.$formula.'</template>'."\n";
1428: } else {
1429: my ($row,$col) = ($cell =~ /^([A-z])(\d+)/);
1430: next if (! defined($row) || ! defined($col));
1431: $Str .= '<field row="'.$row.'" col="'.$col.'" >'.$formula.'</cell>'
1432: ."\n";
1433: }
1434: }
1435: $Str.="</spreadsheet>";
1436: return $Str;
1437: }
1438:
1439: ############################################
1440: ### Filesystem routines ###
1441: ############################################
1442: sub parse_sheet {
1443: # $sheetxml is a scalar reference or a scalar
1444: my ($sheetxml) = @_;
1445: if (! ref($sheetxml)) {
1446: my $tmp = $sheetxml;
1447: $sheetxml = \$tmp;
1448: }
1449: my %formulas;
1450: my %sources;
1451: my $parser=HTML::TokeParser->new($sheetxml);
1452: my $token;
1453: while ($token=$parser->get_token) {
1454: if ($token->[0] eq 'S') {
1455: if ($token->[1] eq 'field') {
1456: my $cell = $token->[2]->{'col'}.$token->[2]->{'row'};
1457: my $source = $token->[2]->{'source'};
1458: my $formula = $parser->get_text('/field');
1459: $formulas{$cell} = $formula;
1460: $sources{$cell} = $source if (defined($source));
1461: $parser->get_text('/field');
1462: }
1463: if ($token->[1] eq 'template') {
1464: $formulas{'template_'.$token->[2]->{'col'}}=
1465: $parser->get_text('/template');
1466: }
1467: }
1468: }
1469: return (\%formulas,\%sources);
1470: }
1471:
1472: {
1473:
1474: my %spreadsheets;
1475:
1476: sub clear_spreadsheet_definition_cache {
1477: undef(%spreadsheets);
1478: }
1479:
1480: sub load_system_default_sheet {
1481: my $self = shift;
1482: my $includedir = $Apache::lonnet::perlvar{'lonIncludes'};
1483: # load in the default defined spreadsheet
1484: my $sheetxml='';
1485: my $fh;
1486: if ($fh=Apache::File->new($includedir.'/default_'.$self->{'type'})) {
1487: $sheetxml=join('',<$fh>);
1488: $fh->close();
1489: } else {
1490: # $sheetxml='<field row="0" col="A">"Error"</field>';
1491: $sheetxml='<field row="0" col="A"></field>';
1492: }
1493: $self->filename('default_');
1494: my ($formulas,undef) = &parse_sheet(\$sheetxml);
1495: return $formulas;
1496: }
1497:
1498: sub load {
1499: my $self = shift;
1500: #
1501: my $stype = $self->{'type'};
1502: my $cnum = $self->{'cnum'};
1503: my $cdom = $self->{'cdom'};
1504: my $chome = $self->{'chome'};
1505: #
1506: my $filename = $self->filename();
1507: my $cachekey = join('_',($cnum,$cdom,$stype,$filename));
1508: #
1509: # see if sheet is cached
1510: my ($formulas);
1511: if (exists($spreadsheets{$cachekey})) {
1512: $formulas = $spreadsheets{$cachekey}->{'formulas'};
1513: } else {
1514: # Not cached, need to read
1515: if (! defined($filename)) {
1516: $formulas = $self->load_system_default_sheet();
1517: } elsif($self->filename() =~ /^\/res\/.*\.spreadsheet$/) {
1518: # Load a spreadsheet definition file
1519: my $sheetxml=&Apache::lonnet::getfile
1520: (&Apache::lonnet::filelocation('',$filename));
1521: if ($sheetxml == -1) {
1522: $sheetxml='<field row="0" col="A">"Error loading spreadsheet '
1523: .$self->filename().'"</field>';
1524: }
1525: ($formulas,undef) = &parse_sheet(\$sheetxml);
1526: # Get just the filename and set the sheets filename
1527: my ($newfilename) = ($filename =~ /\/([^\/]*)\.spreadsheet$/);
1528: if ($self->is_default()) {
1529: $self->filename($newfilename);
1530: $self->make_default();
1531: } else {
1532: $self->filename($newfilename);
1533: }
1534: } else {
1535: # Load the spreadsheet definition file from the save file
1536: my %tmphash = &Apache::lonnet::dump($filename,$cdom,$cnum);
1537: my ($tmp) = keys(%tmphash);
1538: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
1539: while (my ($cell,$formula) = each(%tmphash)) {
1540: $formulas->{$cell}=$formula;
1541: }
1542: } else {
1543: $formulas = $self->load_system_default_sheet();
1544: }
1545: }
1546: $filename=$self->filename(); # filename may have changed
1547: $cachekey = join('_',($cnum,$cdom,$stype,$filename));
1548: %{$spreadsheets{$cachekey}->{'formulas'}} = %{$formulas};
1549: }
1550: $self->formulas($formulas);
1551: $self->set_row_sources();
1552: $self->set_row_numbers();
1553: }
1554:
1555: sub set_row_sources {
1556: my $self = shift;
1557: while (my ($cell,$value) = each(%{$self->{'formulas'}})) {
1558: next if ($cell !~ /^A(\d+)/ && $1 > 0);
1559: my $row = $1;
1560: $self->{'row_source'}->{$row} = $value;
1561: }
1562: return;
1563: }
1564:
1565: sub set_row_numbers {
1566: my $self = shift;
1567: while (my ($cell,$value) = each(%{$self->{'formulas'}})) {
1568: next if ($cell !~ /^A(\d+)$/);
1569: next if (! defined($value));
1570: $self->{'row_numbers'}->{$value} = $1;
1571: $self->{'maxrow'} = $1 if ($1 > $self->{'maxrow'});
1572: }
1573: }
1574:
1575: ##
1576: ## exportrow is *not* used to get the export row from a computed sub-sheet.
1577: ##
1578: sub exportrow {
1579: my $self = shift;
1580: my @exportarray;
1581: foreach my $column (@UC_Columns) {
1582: push(@exportarray,$self->value($column.'0'));
1583: }
1584: return @exportarray;
1585: }
1586:
1587: sub save {
1588: my $self = shift;
1589: my ($makedef)=@_;
1590: my $cid=$self->{'cid'};
1591: # If we are saving it, it must not be temporary
1592: $self->temporary(0);
1593: if (&Apache::lonnet::allowed('opa',$cid)) {
1594: my %f=$self->formulas();
1595: my $stype = $self->{'type'};
1596: my $cnum = $self->{'cnum'};
1597: my $cdom = $self->{'cdom'};
1598: my $chome = $self->{'chome'};
1599: my $filename = $self->{'filename'};
1600: my $cachekey = join('_',($cnum,$cdom,$stype,$filename));
1601: # Cache new sheet
1602: %{$spreadsheets{$cachekey}->{'formulas'}}=%f;
1603: # Write sheet
1604: foreach (keys(%f)) {
1605: delete($f{$_}) if ($f{$_} eq 'import');
1606: }
1607: my $reply = &Apache::lonnet::put($filename,\%f,$cdom,$cnum);
1608: return $reply if ($reply ne 'ok');
1609: $reply = &Apache::lonnet::put($stype.'_spreadsheets',
1610: {$filename => $ENV{'user.name'}.'@'.$ENV{'user.domain'}},
1611: $cdom,$cnum);
1612: return $reply if ($reply ne 'ok');
1613: if ($makedef) {
1614: $reply = &Apache::lonnet::put('environment',
1615: {'spreadsheet_default_'.$stype => $filename },
1616: $cdom,$cnum);
1617: return $reply if ($reply ne 'ok');
1618: }
1619: if ($self->is_default()) {
1620: &Apache::lonnet::expirespread('','',$self->{'type'},'');
1621: }
1622: return $reply;
1623: }
1624: return 'unauthorized';
1625: }
1626:
1627: } # end of scope for %spreadsheets
1628:
1629: sub save_tmp {
1630: my $self = shift;
1631: my $filename=$ENV{'user.name'}.'_'.
1632: $ENV{'user.domain'}.'_spreadsheet_'.$self->{'usymb'}.'_'.
1633: $self->{'filename'};
1634: $filename=~s/\W/\_/g;
1635: $filename=$Apache::lonnet::tmpdir.$filename.'.tmp';
1636: $self->temporary(1);
1637: my $fh;
1638: if ($fh=Apache::File->new('>'.$filename)) {
1639: my %f = $self->formulas();
1640: while( my ($cell,$formula) = each(%f)) {
1641: next if ($formula eq 'import');
1642: print $fh &Apache::lonnet::escape($cell)."=".
1643: &Apache::lonnet::escape($formula)."\n";
1644: }
1645: $fh->close();
1646: }
1647: }
1648:
1649: sub load_tmp {
1650: my $self = shift;
1651: my $filename=$ENV{'user.name'}.'_'.
1652: $ENV{'user.domain'}.'_spreadsheet_'.$self->{'usymb'}.'_'.
1653: $self->{'filename'};
1654: $filename=~s/\W/\_/g;
1655: $filename=$Apache::lonnet::tmpdir.$filename.'.tmp';
1656: my %formulas = ();
1657: if (my $spreadsheet_file = Apache::File->new($filename)) {
1658: while (<$spreadsheet_file>) {
1659: chomp;
1660: my ($cell,$formula) = split(/=/);
1661: $cell = &Apache::lonnet::unescape($cell);
1662: $formula = &Apache::lonnet::unescape($formula);
1663: $formulas{$cell} = $formula;
1664: }
1665: $spreadsheet_file->close();
1666: }
1667: # flag the sheet as temporary
1668: $self->temporary(1);
1669: $self->formulas(\%formulas);
1670: $self->set_row_sources();
1671: $self->set_row_numbers();
1672: return;
1673: }
1674:
1675: sub temporary {
1676: my $self=shift;
1677: if (@_) {
1678: ($self->{'temporary'})= @_;
1679: }
1680: return $self->{'temporary'};
1681: }
1682:
1683: sub modify_cell {
1684: # studentcalc overrides this
1685: my $self = shift;
1686: my ($cell,$formula) = @_;
1687: if ($cell =~ /([A-z])\-/) {
1688: $cell = 'template_'.$1;
1689: } elsif ($cell !~ /^([A-z](\d+)|template_[A-z])$/) {
1690: return;
1691: }
1692: $self->set_formula($cell,$formula);
1693: $self->rebuild_stats();
1694: return;
1695: }
1696:
1697: ###########################################
1698: # othersheets: Returns the list of other spreadsheets available
1699: ###########################################
1700: sub othersheets {
1701: my $self = shift();
1702: my ($stype) = @_;
1703: $stype = $self->{'type'} if (! defined($stype) || $stype !~ /calc$/);
1704: #
1705: my @alternatives=();
1706: my %results=&Apache::lonnet::dump($stype.'_spreadsheets',
1707: $self->{'cdom'}, $self->{'cnum'});
1708: my ($tmp) = keys(%results);
1709: if ($tmp =~ /^(con_lost|error|no_such_host)/i ) {
1710: @alternatives = ('Default');
1711: } else {
1712: @alternatives = ('Default', sort (keys(%results)));
1713: }
1714: return @alternatives;
1715: }
1716:
1717: sub blackout {
1718: my $self = shift;
1719: $self->{'blackout'} = $_[0] if (@_);
1720: return $self->{'blackout'};
1721: }
1722:
1723: sub get_row {
1724: my $self = shift;
1725: my ($n)=@_;
1726: my @cols=();
1727: foreach my $col (@UC_Columns,@LC_Columns) {
1728: my $cell = $col.$n;
1729: push(@cols,{ name => $cell,
1730: formula => $self->formula($cell),
1731: value => $self->value($cell)});
1732: }
1733: return @cols;
1734: }
1735:
1736: sub get_template_row {
1737: my $self = shift;
1738: my @cols=();
1739: foreach my $col (@UC_Columns,@LC_Columns) {
1740: my $cell = 'template_'.$col;
1741: push(@cols,{ name => $cell,
1742: formula => $self->formula($cell),
1743: value => $self->formula($cell) });
1744: }
1745: return @cols;
1746: }
1747:
1748: sub need_to_save {
1749: my $self = shift;
1750: if ($self->{'new_rows'} && ! $self->temporary()) {
1751: return 1;
1752: }
1753: return 0;
1754: }
1755:
1756: sub get_row_number_from_key {
1757: my $self = shift;
1758: my ($key) = @_;
1759: if (! exists($self->{'row_numbers'}->{$key}) ||
1760: ! defined($self->{'row_numbers'}->{$key})) {
1761: # I used to set $f here to the new value, but the key passed for lookup
1762: # may not be the key we need to save
1763: $self->{'maxrow'}++;
1764: $self->{'row_numbers'}->{$key} = $self->{'maxrow'};
1765: # $self->logthis('added row '.$self->{'row_numbers'}->{$key}.
1766: # ' for '.$key);
1767: $self->{'new_rows'} = 1;
1768: }
1769: return $self->{'row_numbers'}->{$key};
1770: }
1771:
1772: 1;
1773:
1774: __END__
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