1: #
2: # $Id: Spreadsheet.pm,v 1.51 2005/05/17 20:17:03 albertel 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 warnings FATAL=>'all';
52: #no warnings 'uninitialized';
53: use Apache::Constants qw(:common :http);
54: use Apache::lonnet;
55: use Safe;
56: use Safe::Hole;
57: use Opcode;
58: use HTML::Entities();
59: use HTML::TokeParser;
60: use Spreadsheet::WriteExcel;
61: use Time::HiRes;
62: use Apache::lonlocal;
63:
64: ##
65: ## Package Variables
66: ##
67: my %expiredates;
68:
69: my @UC_Columns = split(//,'ABCDEFGHIJKLMNOPQRSTUVWXYZ');
70: my @LC_Columns = split(//,'abcdefghijklmnopqrstuvwxyz');
71:
72: ######################################################
73:
74: =pod
75:
76: =item &new
77:
78: Returns a new spreadsheet object.
79:
80: =cut
81:
82: ######################################################
83: sub new {
84: my $this = shift;
85: my $class = ref($this) || $this;
86: my ($stype) = ($class =~ /Apache::(.*)$/);
87: #
88: my ($name,$domain,$filename,$usymb)=@_;
89: if (defined($usymb) && ref($usymb)) {
90: $usymb = $usymb->symb;
91: }
92: if (! defined($name) || $name eq '') {
93: $name = $env{'user.name'};
94: }
95: if (! defined($domain) || $domain eq '') {
96: $domain = $env{'user.domain'};
97: }
98: #
99: my $self = {
100: name => $name,
101: domain => $domain,
102: type => $stype,
103: symb => $usymb,
104: errorlog => '',
105: maxrow => 0,
106: cid => $env{'request.course.id'},
107: cnum => $env{'course.'.$env{'request.course.id'}.'.num'},
108: cdom => $env{'course.'.$env{'request.course.id'}.'.domain'},
109: coursedesc => $env{'course.'.$env{'request.course.id'}.'.description'},
110: coursefilename => $env{'request.course.fn'},
111: #
112: # Flags
113: temporary => 0, # true if this sheet has been modified but not saved
114: new_rows => 0, # true if this sheet has new rows
115: loaded => 0, # true if the formulas have been loaded
116: #
117: # blackout is used to determine if any data needs to be hidden from the
118: # student.
119: blackout => 0,
120: #
121: # Data storage
122: formulas => {},
123: constants => {},
124: rows => [],
125: row_source => {},
126: othersheets => [],
127: };
128: #
129: bless($self,$class);
130: $self->filename($filename);
131: #
132: return $self;
133: }
134:
135: ######################################################
136:
137: =pod
138:
139: =item &filename
140:
141: get or set the filename for a spreadsheet.
142:
143: =cut
144:
145: ######################################################
146: sub filename {
147: my $self = shift();
148: if (@_) {
149: my ($newfilename) = @_;
150: if (! defined($newfilename) || $newfilename eq 'Default' ||
151: $newfilename !~ /\w/ || $newfilename eq '') {
152: my $key = 'course.'.$self->{'cid'}.'.spreadsheet_default_'.
153: $self->{'type'};
154: if (exists($env{$key}) && $env{$key} ne '') {
155: $newfilename = $env{$key};
156: } else {
157: $newfilename = 'default_'.$self->{'type'};
158: }
159: }
160: if ($newfilename !~ /\w/ || $newfilename =~ /^\W*$/) {
161: $newfilename = 'default_'.$self->{'type'};
162: }
163: if ($newfilename !~ /^default\.$self->{'type'}$/ &&
164: $newfilename !~ /^\/res\/(.*)spreadsheet$/) {
165: if ($newfilename !~ /_$self->{'type'}$/) {
166: $newfilename =~ s/[\s_]*$//;
167: $newfilename .= '_'.$self->{'type'};
168: }
169: }
170: $self->{'filename'} = $newfilename;
171: return;
172: }
173: return $self->{'filename'};
174: }
175:
176: ######################################################
177:
178: =pod
179:
180: =item &make_default()
181:
182: Make the current spreadsheet file the default for the course. Expires all the
183: default spreadsheets.......!
184:
185: =cut
186:
187: ######################################################
188: sub make_default {
189: my $self = shift();
190: my $result = &Apache::lonnet::put('environment',
191: {'spreadsheet_default_'.$self->{'type'} => $self->filename()},
192: $self->{'cdom'},$self->{'cnum'});
193: return $result if ($result ne 'ok');
194: my $symb = $self->{'symb'};
195: $symb = '' if (! defined($symb));
196: &Apache::lonnet::expirespread('','',$self->{'type'},$symb);
197: }
198:
199: ######################################################
200:
201: =pod
202:
203: =item &is_default()
204:
205: Returns 1 if the current spreadsheet is the default as specified in the
206: course environment. Returns 0 otherwise.
207:
208: =cut
209:
210: ######################################################
211: sub is_default {
212: my $self = shift;
213: # Check to find out if we are the default spreadsheet (filenames match)
214: my $default_filename = '';
215: my %tmphash = &Apache::lonnet::get('environment',
216: ['spreadsheet_default_'.
217: $self->{'type'}],
218: $self->{'cdom'},
219: $self->{'cnum'});
220: my ($tmp) = keys(%tmphash);
221: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
222: $default_filename = $tmphash{'spreadsheet_default_'.$self->{'type'}};
223: }
224: if ($default_filename =~ /^\s*$/) {
225: $default_filename = 'default_'.$self->{'type'};
226: }
227: return 1 if ($self->filename() eq $default_filename);
228: return 0;
229: }
230:
231: sub initialize {
232: # This method is here to remind you that it will be overridden by
233: # the descendents of the spreadsheet class.
234: }
235:
236: sub clear_package {
237: # This method is here to remind you that it will be overridden by
238: # the descendents of the spreadsheet class.
239: }
240:
241: sub cleanup {
242: my $self = shift();
243: $self->clear_package();
244: }
245:
246: sub initialize_spreadsheet_package {
247: &load_spreadsheet_expirationdates();
248: &clear_spreadsheet_definition_cache();
249: }
250:
251: sub load_spreadsheet_expirationdates {
252: undef %expiredates;
253: my $cid=$env{'request.course.id'};
254: my @tmp = &Apache::lonnet::dump('nohist_expirationdates',
255: $env{'course.'.$cid.'.domain'},
256: $env{'course.'.$cid.'.num'});
257: if (lc($tmp[0]) !~ /^error/){
258: %expiredates = @tmp;
259: }
260: }
261:
262: sub check_expiration_time {
263: my $self = shift;
264: my ($time)=@_;
265: return 0 if (! defined($time));
266: my ($key1,$key2,$key3,$key4,$key5);
267: # Description of keys
268: #
269: # key1: all sheets of this type have expired
270: # key2: all sheets of this type for this student
271: # key3: all sheets of this type in this map for this student
272: # key4: this assessment sheet for this student
273: # key5: this assessment sheet for all students
274: $key1 = '::'.$self->{'type'}.':';
275: $key2 = $self->{'name'}.':'.$self->{'domain'}.':'.$self->{'type'}.':';
276: $key3 = $key2.$self->{'container'} if (defined($self->{'container'}));
277: $key4 = $key2.$self->{'symb'} if (defined($self->{'symb'}));
278: $key5 = $key1.$self->{'symb'} if (defined($self->{'symb'}));
279: my $returnvalue = 1; # default to okay
280: foreach my $key ($key1,$key2,$key3,$key4,$key5) {
281: next if (! defined($key));
282: if (exists($expiredates{$key}) && $expiredates{$key} > $time) {
283: $returnvalue = 0; # need to recompute
284: }
285: }
286: return $returnvalue;
287: }
288:
289: ######################################################
290:
291: =pod
292:
293: =item &initialize_safe_space
294:
295: Returns the safe space required by a Spreadsheet object.
296:
297: =head 2 Safe Space Functions
298:
299: =over 4
300:
301: =cut
302:
303: ######################################################
304: {
305:
306: my $safeeval;
307:
308: sub initialize_safe_space {
309: my $self = shift;
310: my $usection = &Apache::lonnet::getsection($self->{'domain'},
311: $self->{'name'},
312: $env{'request.course.id'});
313: if (! defined($safeeval)) {
314: $safeeval = new Safe(shift);
315: my $safehole = new Safe::Hole;
316: $safeeval->permit("entereval");
317: $safeeval->permit(":base_math");
318: $safeeval->permit("sort");
319: $safeeval->deny(":base_io");
320: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&Apache::lonnet::EXT');
321: $safehole->wrap(\&mask,$safeeval,'&mask');
322: $safehole->wrap(\&Apache::lonnet::logthis,$safeeval,'&logthis');
323: $safeeval->share('$@');
324: # Holds the (computed, final) values for the sheet
325: # This is only written to by &calc, the spreadsheet computation routine.
326: # It is read by many functions
327: $safeeval->share('%sheet_values');
328: my $code=<<'ENDDEFS';
329: # ---------------------------------------------------- Inside of the safe space
330: #
331: # f: formulas
332: # t: intermediate format (variable references expanded)
333: # v: output values
334: # c: preloaded constants (A-column)
335: # rl: row label
336: # os: other spreadsheets (for student spreadsheet only)
337: undef %t; # Holds the forumlas of the spreadsheet to be computed. Set in
338: # &sett, which does the translation of strings like C5 into the value
339: # in C5. Used in &calc - %t holds the values that are actually eval'd.
340: undef %f; # Holds the formulas for each cell. This is the users
341: # (spreadsheet authors) data for each cell.
342: undef %c; # Holds the constants for a sheet. In the assessment
343: # sheets, this is the A column. Used in &MINPARM, &MAXPARM, &expandnamed,
344: # &sett, and &constants. There is no &getconstants.
345: # &constants is called by &loadstudent, &loadcourse, &load assessment,
346: undef @os; # Holds the names of other spreadsheets - this is used to specify
347: # the spreadsheets that are available for the assessment sheet.
348: # Set by &setothersheets. &setothersheets is called by &handler. A
349: # related subroutine is &othersheets.
350: $errorlog = '';
351: #
352: $maxrow = 0;
353: $type = '';
354: #
355: # filename/reference of the sheet
356: $filename = '';
357: #
358: # user data
359: $name = '';
360: $domain = '';
361: #
362: # course data
363: $csec = '';
364: $cnum = '';
365: $cdom = '';
366: $cid = '';
367: $coursefilename = '';
368: #
369: # symb
370: $usymb = '';
371: #
372: # error messages
373: $errormsg = '';
374: #
375: #-------------------------------------------------------
376:
377: =pod
378:
379: =item EXT(parameter)
380:
381: Calls the system EXT function to determine the value of the given parameter.
382:
383: =cut
384:
385: #-------------------------------------------------------
386: sub EXT {
387: my ($parameter) = @_;
388: return '' if (! defined($parameter) || $parameter eq '');
389: $parameter =~ s/^parameter\./resource\./;
390: my $value = &Apache::lonnet::EXT($parameter,$symb,$domain,$name,$usection);
391: return $value;
392: }
393:
394: #-------------------------------------------------------
395:
396: =pod
397:
398: =item NUM(range)
399:
400: returns the number of items in the range.
401:
402: =cut
403:
404: #-------------------------------------------------------
405: sub NUM {
406: my $values=&get_values(@_);
407: my $num= scalar(@$values);
408: return $num;
409: }
410:
411: #-------------------------------------------------------
412:
413: =pod
414:
415: =item BIN(low,high,lower,upper)
416:
417: =cut
418:
419: #-------------------------------------------------------
420: sub BIN {
421: my ($low,$high,$lower,$upper)=@_;
422: my $values=&get_values($lower,$upper);
423: my $num=0;
424: foreach (@$values) {
425: if (($_>=$low) && ($_<=$high)) {
426: $num++;
427: }
428: }
429: return $num;
430: }
431:
432: #-------------------------------------------------------
433:
434: =pod
435:
436: =item SUM(range)
437:
438: returns the sum of items in the range.
439:
440: =cut
441:
442: #-------------------------------------------------------
443: sub SUM {
444: my $values=&get_values(@_);
445: my $sum=0;
446: foreach (@$values) {
447: $sum+=$_;
448: }
449: return $sum;
450: }
451:
452: #-------------------------------------------------------
453:
454: =pod
455:
456: =item MEAN(range)
457:
458: compute the average of the items in the range.
459:
460: =cut
461:
462: #-------------------------------------------------------
463: sub MEAN {
464: my $values=&get_values(@_);
465: my $sum=0;
466: my $num=0;
467: foreach (@$values) {
468: $sum+=$_;
469: $num++;
470: }
471: if ($num) {
472: return $sum/$num;
473: } else {
474: return undef;
475: }
476: }
477:
478: #-------------------------------------------------------
479:
480: =pod
481:
482: =item STDDEV(range)
483:
484: compute the standard deviation of the items in the range.
485:
486: =cut
487:
488: #-------------------------------------------------------
489: sub STDDEV {
490: my $values=&get_values(@_);
491: my $sum=0; my $num=0;
492: foreach (@$values) {
493: $sum+=$_;
494: $num++;
495: }
496: unless ($num>1) { return undef; }
497: my $mean=$sum/$num;
498: $sum=0;
499: foreach (@$values) {
500: $sum+=($_-$mean)**2;
501: }
502: return sqrt($sum/($num-1));
503: }
504:
505: #-------------------------------------------------------
506:
507: =pod
508:
509: =item PROD(range)
510:
511: compute the product of the items in the range.
512:
513: =cut
514:
515: #-------------------------------------------------------
516: sub PROD {
517: my $values=&get_values(@_);
518: my $prod=1;
519: foreach (@$values) {
520: $prod*=$_;
521: }
522: return $prod;
523: }
524:
525: #-------------------------------------------------------
526:
527: =pod
528:
529: =item MAX(range)
530:
531: compute the maximum of the items in the range.
532:
533: =cut
534:
535: #-------------------------------------------------------
536: sub MAX {
537: my $values=&get_values(@_);
538: my $max='-';
539: foreach (@$values) {
540: if (($_>$max) || ($max eq '-')) {
541: $max=$_;
542: }
543: }
544: return $max;
545: }
546:
547: #-------------------------------------------------------
548:
549: =pod
550:
551: =item MIN(range)
552:
553: compute the minimum of the items in the range.
554:
555: =cut
556:
557: #-------------------------------------------------------
558: sub MIN {
559: my $values=&get_values(@_);
560: my $min='-';
561: foreach (@$values) {
562: if (($_<$min) || ($min eq '-')) {
563: $min=$_;
564: }
565: }
566: return $min;
567: }
568:
569: #-------------------------------------------------------
570:
571: =pod
572:
573: =item SUMMAX(num,lower,upper)
574:
575: compute the sum of the largest 'num' items in the range from
576: 'lower' to 'upper'
577:
578: =cut
579:
580: #-------------------------------------------------------
581: sub SUMMAX {
582: my ($num,$lower,$upper)=@_;
583: my $values=&get_values($lower,$upper);
584: my @inside=sort {$a <=> $b} (@$values);
585: my $sum=0; my $i;
586: for ($i=$#inside;(($i>$#inside-$num) && ($i>=0));$i--) {
587: $sum+=$inside[$i];
588: }
589: return $sum;
590: }
591:
592: #-------------------------------------------------------
593:
594: =pod
595:
596: =item SUMMIN(num,lower,upper)
597:
598: compute the sum of the smallest 'num' items in the range from
599: 'lower' to 'upper'
600:
601: =cut
602:
603: #-------------------------------------------------------
604: sub SUMMIN {
605: my ($num,$lower,$upper)=@_;
606: my $values=&get_values($lower,$upper);
607: my @inside=sort {$a <=> $b} (@$values);
608: my $sum=0; my $i;
609: for ($i=0;(($i<$num) && ($i<=$#inside));$i++) {
610: $sum+=$inside[$i];
611: }
612: return $sum;
613: }
614:
615: #-------------------------------------------------------
616:
617: =pod
618:
619: =item MINPARM(parametername)
620:
621: Returns the minimum value of the parameters matching the parametername.
622: parametername should be a string such as 'duedate'.
623:
624: =cut
625:
626: #-------------------------------------------------------
627: sub MINPARM {
628: my ($expression) = @_;
629: my $min = undef;
630: foreach $parameter (keys(%c)) {
631: next if ($parameter !~ /$expression/);
632: if ((! defined($min)) || ($min > $c{$parameter})) {
633: $min = $c{$parameter}
634: }
635: }
636: return $min;
637: }
638:
639: #-------------------------------------------------------
640:
641: =pod
642:
643: =item MAXPARM(parametername)
644:
645: Returns the maximum value of the parameters matching the input parameter name.
646: parametername should be a string such as 'duedate'.
647:
648: =cut
649:
650: #-------------------------------------------------------
651: sub MAXPARM {
652: my ($expression) = @_;
653: my $max = undef;
654: foreach $parameter (keys(%c)) {
655: next if ($parameter !~ /$expression/);
656: if ((! defined($min)) || ($max < $c{$parameter})) {
657: $max = $c{$parameter}
658: }
659: }
660: return $max;
661: }
662:
663: #-------------------------------------------------------
664:
665: =pod
666:
667: =item &get_values($lower,$upper)
668:
669: Inputs: $lower and $upper, cell names ("X12" or "a150") or globs ("X*").
670:
671: Returns: an array ref of the values of the cells that exist in the
672: speced range
673:
674: =cut
675:
676: #-------------------------------------------------------
677: sub get_values {
678: my ($lower,$upper)=@_;
679: $upper = $lower if (! defined($upper));
680: my @values;
681: my ($la,$ld) = ($lower=~/([A-z]|\*)(\d+|\*)/);
682: my ($ua,$ud) = ($upper=~/([A-z]|\*)(\d+|\*)/);
683: my ($alpha,$num);
684: if ($ld ne '*' && $ud ne '*') {
685: my @alpha;
686: if (($la eq '*') || ($ua eq '*')) {
687: @alpha=('A'..'z');
688: } else {
689: if ($la gt $ua) { ($la,$ua)=($ua,$la); }
690: if ((lc($la) ne $la) && (lc($ua) eq $ua)) {
691: @alpha=($la..'Z','a'..$ua);
692: } else {
693: @alpha=($la..$ua);
694: }
695: }
696: my @num=($ld..$ud);
697: foreach my $a (@alpha) {
698: foreach my $n (@num) {
699: if (exists($sheet_values{$a.$n})) {
700: push(@values,$sheet_values{$a.$n});
701: }
702: }
703: }
704: return \@values;
705: } else {
706: $num = '(\d+)';
707: }
708: if (($la eq '*') || ($ua eq '*')) {
709: $alpha='[A-z]';
710: } else {
711: if ($la gt $ua) { ($la,$ua)=($ua,$la); }
712: $alpha=qq/[$la-$ua]/;
713: }
714: my $expression = '^'.$alpha.$num.'$';
715: foreach (grep /$expression/,keys(%sheet_values)) {
716: push(@values,$sheet_values{$_});
717: }
718: return \@values;
719: }
720:
721: sub calc {
722: my $notfinished = 1;
723: my $lastcalc = '';
724: my $depth = 0;
725: while ($notfinished) {
726: $notfinished=0;
727: while (my ($cell,$value) = each(%t)) {
728: my $old=$sheet_values{$cell};
729: $sheet_values{$cell}=eval $value;
730: # $errorlog .= $cell.' = '.$old.'->'.$sheet_values{$cell}."\n";
731: if ($@) {
732: undef %sheet_values;
733: return $cell.': '.$@;
734: }
735: if ($sheet_values{$cell} ne $old) {
736: $notfinished=1;
737: $lastcalc=$cell;
738: }
739: }
740: # $errorlog.="------------------------------------------------";
741:
742: $depth++;
743: if ($depth>100) {
744: undef %sheet_values;
745: return $lastcalc.': Maximum calculation depth exceeded';
746: }
747: }
748: return 'okay';
749: }
750:
751: # ------------------------------------------- End of "Inside of the safe space"
752: ENDDEFS
753: $safeeval->reval($code);
754: }
755: $self->{'safe'} = $safeeval;
756: $self->{'root'} = $self->{'safe'}->root();
757: #
758: # Place some of the %$self items into the safe space except the safe space
759: # itself
760: my $initstring = '';
761: foreach (qw/name domain type symb cid csec coursefilename
762: cnum cdom/) {
763: $initstring.= qq{\$$_="$self->{$_}";};
764: }
765: $initstring.=qq{\$usection="$usection";};
766: $self->{'safe'}->reval($initstring);
767: return $self;
768: }
769:
770: }
771:
772: ######################################################
773:
774: =pod
775:
776: =back
777:
778: =cut
779:
780: ######################################################
781:
782: ##
783: ## sub add_hash_to_safe {} # spreadsheet, would like to destroy
784: ##
785:
786: #
787: # expandnamed used to reside in the safe space
788: #
789: sub expandnamed {
790: my $self = shift;
791: my $expression=shift;
792: if ($expression=~/^\&/) {
793: my ($func,$var,$formula)=($expression=~/^\&(\w+)\(([^\;]+)\;(.*)\)/);
794: my @vars=split(/\W+/,$formula);
795: my %values=();
796: foreach my $varname ( @vars ) {
797: if ($varname=~/^(parameter|stores|timestamp)/) {
798: $formula=~s/$varname/'$c{\''.$varname.'\'}'/ge;
799: $varname=~s/$var/\([\\w:\\- ]\+\)/g;
800: foreach (keys(%{$self->{'constants'}})) {
801: if ($_=~/$varname/) {
802: $values{$1}=1;
803: }
804: }
805: }
806: }
807: if ($func eq 'EXPANDSUM') {
808: my $result='';
809: foreach (keys(%values)) {
810: my $thissum=$formula;
811: $thissum=~s/$var/$_/g;
812: $result.=$thissum.'+';
813: }
814: $result=~s/\+$//;
815: return $result;
816: } else {
817: return 0;
818: }
819: } else {
820: # it is not a function, so it is a parameter name
821: # We should do the following:
822: # 1. Take the list of parameter names
823: # 2. look through the list for ones that match the parameter we want
824: # 3. If there are no collisions, return the one that matches
825: # 4. If there is a collision, return 'bad parameter name error'
826: my $returnvalue = '';
827: my @matches = ();
828: my @values = ();
829: $#matches = -1;
830: while (my($parameter,$value) = each(%{$self->{'constants'}})) {
831: next if ($parameter !~ /$expression/);
832: push(@matches,$parameter);
833: push(@values,$value);
834: }
835: if (scalar(@matches) == 0) {
836: $returnvalue = '""';#'"unmatched parameter: '.$parameter.'"';
837: } elsif (scalar(@matches) == 1) {
838: # why do we not do this lookup here, instead of delaying it?
839: $returnvalue = $values[0];
840: } elsif (scalar(@matches) > 0) {
841: # more than one match. Look for a concise one
842: $returnvalue = "'non-unique parameter name : $expression'";
843: for (my $i=0; $i<=$#matches;$i++) {
844: if ($matches[$i] =~ /^$expression$/) {
845: # why do we not do this lookup here?
846: $returnvalue = $values[$i];
847: }
848: }
849: } else {
850: # There was a negative number of matches, which indicates
851: # something is wrong with reality. Better warn the user.
852: $returnvalue = '"bizzare parameter: '.$expression.'"';
853: }
854: return $returnvalue;
855: }
856: }
857:
858: sub sett {
859: my $self = shift;
860: my %t=();
861: undef(%Apache::Spreadsheet::sheet_values);
862: #
863: # Deal with the template row
864: foreach my $col ($self->template_cells()) {
865: next if ($col=~/^[A-Z]/);
866: foreach my $row ($self->rows()) {
867: # Get the name of this cell
868: my $cell=$col.$row;
869: # Grab the template declaration
870: $t{$cell}=$self->formula('template_'.$col);
871: # Replace '#' with the row number
872: $t{$cell}=~s/\#/$row/g;
873: # Replace '....' with ','
874: $t{$cell}=~s/\.\.+/\,/g;
875: # Replace 'A0' with the value from 'A0'
876: $t{$cell}=~s/(^|[^\"\'])([A-Za-z]\d+)/$1\$sheet_values\{\'$2\'\}/g;
877: # Replace parameters
878: $t{$cell}=~s/(^|[^\"\'])\[([^\]]+)\]/$1.$self->expandnamed($2)/ge;
879: }
880: }
881: #
882: # Deal with the normal cells
883: while (my($cell,$formula) = each(%{$self->{'formulas'}})) {
884: next if ($_=~/^template\_/);
885: my ($col,$row) = ($cell =~ /^([A-z])(\d+)$/);
886: if ($row eq '0') {
887: $t{$cell}=$formula;
888: $t{$cell}=~s/\.\.+/\,/g;
889: $t{$cell}=~s/(^|[^\"\'])([A-Za-z]\d+)/$1\$sheet_values\{\'$2\'\}/g;
890: $t{$cell}=~s/(^|[^\"\'])\[([^\]]+)\]/$1.$self->expandnamed($2)/ge;
891: } elsif ( $col =~ /^[A-Z]$/ ) {
892: if ($formula !~ /^\!/ && exists($self->{'constants'}->{$cell})
893: && $self->{'constants'}->{$cell} ne '') {
894: $Apache::Spreadsheet::sheet_values{$cell}=
895: eval($self->{'constants'}->{$cell});
896: }
897: } else { # $row > 1 and $col =~ /[a-z]
898: $t{$cell}=$formula;
899: $t{$cell}=~s/\.\.+/\,/g;
900: $t{$cell}=~s/(^|[^\"\'])([A-Za-z]\d+)/$1\$sheet_values\{\'$2\'\}/g;
901: $t{$cell}=~s/(^|[^\"\'])\[([^\]]+)\]/$1.$self->expandnamed($2)/ge;
902: }
903: }
904: %{$self->{'safe'}->varglob('t')}=%t;
905: }
906:
907: ##
908: ## sync_safe_space: Called by calcsheet to make sure all the data we
909: # need to calculate is placed into the safe space
910: ##
911: sub sync_safe_space {
912: my $self = shift;
913: # Inside the safe space 'formulas' has a diabolical alter-ego named 'f'.
914: #%{$self->{'safe'}->varglob('f')}=%{$self->{'formulas'}};
915: # 'constants' leads a peaceful hidden life of 'c'.
916: %{$self->{'safe'}->varglob('c')}=%{$self->{'constants'}};
917: # 'othersheets' hides as 'os', a disguise few can penetrate.
918: #@{$self->{'safe'}->varglob('os')}=@{$self->{'othersheets'}};
919: }
920:
921: ##
922: ## Retrieve the error log from the safe space (used for debugging)
923: ##
924: sub get_errorlog {
925: my $self = shift;
926: $self->{'errorlog'} = $ { $self->{'safe'}->varglob('errorlog') };
927: return $self->{'errorlog'};
928: }
929:
930: ##
931: ## Clear the error log inside the safe space
932: ##
933: sub clear_errorlog {
934: my $self = shift;
935: $ {$self->{'safe'}->varglob('errorlog')} = '';
936: $self->{'errorlog'} = '';
937: }
938:
939: ##
940: ## constants: either set or get the constants
941: ##
942: sub constants {
943: my $self=shift;
944: my ($constants) = @_;
945: if (defined($constants)) {
946: if (! ref($constants)) {
947: my %tmp = @_;
948: $constants = \%tmp;
949: }
950: $self->{'constants'} = $constants;
951: return;
952: } else {
953: return %{$self->{'constants'}};
954: }
955: }
956:
957: ##
958: ## formulas: either set or get the formulas
959: ##
960: sub formulas {
961: my $self=shift;
962: my ($formulas) = @_;
963: if (defined($formulas)) {
964: if (! ref($formulas)) {
965: my %tmp = @_;
966: $formulas = \%tmp;
967: }
968: $self->{'formulas'} = $formulas;
969: $self->{'rows'} = [];
970: $self->{'template_cells'} = [];
971: return;
972: } else {
973: if (!$self->{'loaded'}) {
974: $self->{'loaded'}=1;
975: # Load in the spreadsheet definition
976: if (exists($env{'form.workcopy'}) &&
977: $self->{'type'} eq $env{'form.workcopy'}) {
978: $self->load_tmp();
979: } else {
980: $self->load();
981: }
982: }
983: return %{$self->{'formulas'}};
984: }
985: }
986:
987: sub set_formula {
988: my $self = shift;
989: my ($cell,$formula) = @_;
990: $self->{'formulas'}->{$cell}=$formula;
991: return;
992: }
993:
994: ##
995: ## formulas_keys: Return the keys to the formulas hash.
996: ##
997: sub formulas_keys {
998: my $self = shift;
999: my @keys = keys(%{$self->{'formulas'}});
1000: return keys(%{$self->{'formulas'}});
1001: }
1002:
1003: ##
1004: ## formula: Return the formula for a given cell in the spreadsheet
1005: ## returns '' if the cell does not have a formula or does not exist
1006: ##
1007: sub formula {
1008: my $self = shift;
1009: my $cell = shift;
1010: if (defined($cell) && exists($self->{'formulas'}->{$cell})) {
1011: return $self->{'formulas'}->{$cell};
1012: }
1013: return '';
1014: }
1015:
1016: ##
1017: ## logthis: write the input to lonnet.log
1018: ##
1019: sub logthis {
1020: my $self = shift;
1021: my $message = shift;
1022: &Apache::lonnet::logthis($self->{'type'}.':'.
1023: $self->{'name'}.':'.$self->{'domain'}.':'.
1024: $message);
1025: return;
1026: }
1027:
1028: ##
1029: ## dump_formulas_to_log: makes lonnet.log huge...
1030: ##
1031: sub dump_formulas_to_log {
1032: my $self =shift;
1033: $self->logthis("Spreadsheet formulas");
1034: $self->logthis("--------------------------------------------------------");
1035: while (my ($cell, $formula) = each(%{$self->{'formulas'}})) {
1036: $self->logthis(' '.$cell.' = '.$formula);
1037: }
1038: $self->logthis("--------------------------------------------------------");}
1039:
1040: ##
1041: ## value: returns the computed value of a particular cell
1042: ##
1043: sub value {
1044: my $self = shift;
1045: my $cell = shift;
1046: if (defined($cell) && exists($self->{'values'}->{$cell})) {
1047: return $self->{'values'}->{$cell};
1048: }
1049: return '';
1050: }
1051:
1052: ##
1053: ## dump_values_to_log: makes lonnet.log huge...
1054: ##
1055: sub dump_values_to_log {
1056: my $self =shift;
1057: $self->logthis("Spreadsheet Values");
1058: $self->logthis("------------------------------------------------------");
1059: while (my ($cell, $value) = each(%{$self->{'values'}})) {
1060: $self->logthis(' '.$cell.' = '.$value);
1061: }
1062: $self->logthis("------------------------------------------------------");
1063: }
1064:
1065: ##
1066: ## Yet another debugging function
1067: ##
1068: sub dump_hash_to_log {
1069: my $self= shift();
1070: my %tmp = @_;
1071: if (@_<2) {
1072: %tmp = %{$_[0]};
1073: }
1074: $self->logthis('---------------------------- (begin hash dump)');
1075: while (my ($key,$val) = each (%tmp)) {
1076: $self->logthis(' '.$key.' = '.$val.':');
1077: }
1078: $self->logthis('---------------------------- (finished hash dump)');
1079: }
1080:
1081: ##
1082: ## rebuild_stats: rebuilds the rows and template_cells arrays
1083: ##
1084: sub rebuild_stats {
1085: my $self = shift;
1086: $self->{'rows'}=[];
1087: $self->{'template_cells'}=[];
1088: while (my ($cell,$formula) = each(%{$self->{'formulas'}})) {
1089: push(@{$self->{'rows'}},$1) if ($cell =~ /^A(\d+)/ && $1 != 0);
1090: push(@{$self->{'template_cells'}},$1) if ($cell =~ /^template_(\w+)/);
1091: }
1092: return;
1093: }
1094:
1095: ##
1096: ## template_cells returns a list of the cells defined in the template row
1097: ##
1098: sub template_cells {
1099: my $self = shift;
1100: $self->rebuild_stats() if (! defined($self->{'template_cells'}) ||
1101: ! @{$self->{'template_cells'}});
1102: return @{$self->{'template_cells'}};
1103: }
1104:
1105: ##
1106: ## Sigh....
1107: ##
1108: sub setothersheets {
1109: my $self = shift;
1110: my @othersheets = @_;
1111: $self->{'othersheets'} = \@othersheets;
1112: }
1113:
1114: ##
1115: ## rows returns a list of the names of cells defined in the A column
1116: ##
1117: sub rows {
1118: my $self = shift;
1119: $self->rebuild_stats() if (!@{$self->{'rows'}});
1120: return @{$self->{'rows'}};
1121: }
1122:
1123: #
1124: # calcsheet: makes all the calls to compute the spreadsheet.
1125: #
1126: sub calcsheet {
1127: my $self = shift;
1128: $self->sync_safe_space();
1129: $self->clear_errorlog();
1130: $self->sett();
1131: my $result = $self->{'safe'}->reval('&calc();');
1132: # $self->logthis($self->get_errorlog());
1133: %{$self->{'values'}} = %{$self->{'safe'}->varglob('sheet_values')};
1134: # $self->logthis($self->get_errorlog());
1135: if ($result ne 'okay') {
1136: $self->set_calcerror($result);
1137: }
1138: return $result;
1139: }
1140:
1141: sub set_badcalc {
1142: my $self = shift();
1143: $self->{'badcalc'} =1;
1144: return;
1145: }
1146:
1147: sub badcalc {
1148: my $self = shift;
1149: if (exists($self->{'badcalc'}) && $self->{'badcalc'}) {
1150: return 1;
1151: } else {
1152: return 0;
1153: }
1154: }
1155:
1156: sub set_calcerror {
1157: my $self = shift;
1158: if (@_) {
1159: $self->set_badcalc();
1160: if (exists($self->{'calcerror'})) {
1161: $self->{'calcerror'}.="\n".$_[0];
1162: } else {
1163: $self->{'calcerror'}.=$_[0];
1164: }
1165: }
1166: }
1167:
1168: sub calcerror {
1169: my $self = shift;
1170: if ($self->badcalc()) {
1171: if (exists($self->{'calcerror'})) {
1172: return $self->{'calcerror'};
1173: }
1174: }
1175: return;
1176: }
1177:
1178: ###########################################################
1179: ##
1180: ## Output Helpers
1181: ##
1182: ###########################################################
1183: sub display {
1184: my $self = shift;
1185: my ($r) = @_;
1186: my $outputmode = 'html';
1187: foreach ($self->output_options()) {
1188: if ($env{'form.output_format'} eq $_->{'value'}) {
1189: $outputmode = $_->{'value'};
1190: last;
1191: }
1192: }
1193: if ($outputmode eq 'html') {
1194: $self->compute($r);
1195: $self->outsheet_html($r);
1196: } elsif ($outputmode eq 'htmlclasslist') {
1197: # No computation neccessary... This is kludgy
1198: $self->outsheet_htmlclasslist($r);
1199: } elsif ($outputmode eq 'excel') {
1200: $self->compute($r);
1201: $self->outsheet_excel($r);
1202: } elsif ($outputmode eq 'csv') {
1203: $self->compute($r);
1204: $self->outsheet_csv($r);
1205: } elsif ($outputmode eq 'xml') {
1206: # $self->compute($r);
1207: $self->outsheet_xml($r);
1208: }
1209: $self->cleanup();
1210: return;
1211: }
1212:
1213: ############################################
1214: ## HTML output routines ##
1215: ############################################
1216: sub html_report_error {
1217: my $self = shift();
1218: my $Str = '';
1219: if ($self->badcalc()) {
1220: $Str = '<h3 style="color:red">'.
1221: &mt('An error occurred while calculating this spreadsheet').
1222: "</h3>\n".
1223: '<pre>'.$self->calcerror()."</pre>\n";
1224: }
1225: return $Str;
1226: }
1227:
1228: sub html_export_row {
1229: my $self = shift();
1230: my ($color) = @_;
1231: $color = '#CCCCFF' if (! defined($color));
1232: my $allowed = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
1233: my $row_html;
1234: my @rowdata = $self->get_row(0);
1235: foreach my $cell (@rowdata) {
1236: if ($cell->{'name'} =~ /^[A-Z]/) {
1237: $row_html .= '<td bgcolor="'.$color.'">'.
1238: &html_editable_cell($cell,$color,$allowed).'</td>';
1239: } else {
1240: $row_html .= '<td bgcolor="#DDCCFF">'.
1241: &html_editable_cell($cell,'#DDCCFF',$allowed).'</td>';
1242: }
1243: }
1244: return $row_html;
1245: }
1246:
1247: sub html_template_row {
1248: my $self = shift();
1249: my $allowed = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
1250: my ($num_uneditable,$importcolor) = @_;
1251: my $row_html;
1252: my @rowdata = $self->get_template_row();
1253: my $count = 0;
1254: for (my $i = 0; $i<=$#rowdata; $i++) {
1255: my $cell = $rowdata[$i];
1256: if ($i < $num_uneditable) {
1257: $row_html .= '<td bgcolor="'.$importcolor.'">'.
1258: &html_uneditable_cell($cell,'#FFDDDD',$allowed).'</td>';
1259: } else {
1260: $row_html .= '<td bgcolor="#EOFFDD">'.
1261: &html_editable_cell($cell,'#EOFFDD',$allowed).'</td>';
1262: }
1263: }
1264: return $row_html;
1265: }
1266:
1267: sub html_editable_cell {
1268: my ($cell,$bgcolor,$allowed) = @_;
1269: my $result;
1270: my ($name,$formula,$value);
1271: if (defined($cell)) {
1272: $name = $cell->{'name'};
1273: $formula = $cell->{'formula'};
1274: $value = $cell->{'value'};
1275: }
1276: $name = '' if (! defined($name));
1277: $formula = '' if (! defined($formula));
1278: if (! defined($value)) {
1279: $value = '<font color="'.$bgcolor.'">#</font>';
1280: if ($formula ne '') {
1281: $value = '<i>undefined value</i>';
1282: }
1283: } elsif ($value =~ /^\s*$/ ) {
1284: $value = '<font color="'.$bgcolor.'">#</font>';
1285: } else {
1286: $value = &HTML::Entities::encode($value,'<>&"') if ($value !~/ /);
1287: }
1288: return $value if (! $allowed);
1289: #
1290: # The formula will be parsed by the browser twice before being
1291: # displayed to the user for editing.
1292: #
1293: # The encoding string "^A-blah" is placed in []'s inside a regexp, so
1294: # we specify the characters we want left alone by putting a '^' in front.
1295: $formula = &HTML::Entities::encode($formula,'^A-z0-9 !#$%-;=?~');
1296: # HTML::Entities::encode does not catch everything - we need '\' encoded
1297: $formula =~ s/\\/&\#092/g;
1298: # Escape it again - this time the only encodable character is '&'
1299: $formula =~ s/\&/\&/g;
1300: # Glue everything together
1301: $result .= "<a href=\"javascript:celledit(\'".
1302: $name."','".$formula."');\">".$value."</a>";
1303: return $result;
1304: }
1305:
1306: sub html_uneditable_cell {
1307: my ($cell,$bgcolor) = @_;
1308: my $value = (defined($cell) ? $cell->{'value'} : '');
1309: $value = &HTML::Entities::encode($value,'<>&"') if ($value !~/ /);
1310: return ' '.$value.' ';
1311: }
1312:
1313: sub html_row {
1314: my $self = shift();
1315: my ($num_uneditable,$row,$exportcolor,$importcolor) = @_;
1316: my $allowed = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
1317: my @rowdata = $self->get_row($row);
1318: my $num_cols_output = 0;
1319: my $row_html;
1320: my $color = $importcolor;
1321: if ($row == 0) {
1322: $color = $exportcolor;
1323: }
1324: $color = '#FFDDDD' if (! defined($color));
1325: foreach my $cell (@rowdata) {
1326: if ($num_cols_output++ < $num_uneditable) {
1327: $row_html .= '<td bgcolor="'.$color.'">';
1328: $row_html .= &html_uneditable_cell($cell,'#FFDDDD');
1329: } else {
1330: $row_html .= '<td bgcolor="#EOFFDD">';
1331: $row_html .= &html_editable_cell($cell,'#E0FFDD',$allowed);
1332: }
1333: $row_html .= '</td>';
1334: }
1335: return $row_html;
1336: }
1337:
1338: sub html_header {
1339: my $self = shift;
1340: return '' if (! $env{'request.role.adv'});
1341: return "<table>\n".
1342: '<tr><th align="center">'.&mt('Output Format').'</th></tr>'."\n".
1343: '<tr><td>'.$self->output_selector()."</td></tr>\n".
1344: "</table>\n";
1345: }
1346:
1347: ##
1348: ## Default output types are HTML, Excel, and CSV
1349: sub output_options {
1350: my $self = shift();
1351: return ({value => 'html',
1352: description => 'HTML'},
1353: {value => 'excel',
1354: description => 'Excel'},
1355: # {value => 'xml',
1356: # description => 'XML'},
1357: {value => 'csv',
1358: description => 'Comma Separated Values'},);
1359: }
1360:
1361: sub output_selector {
1362: my $self = shift();
1363: my $output_selector = '<select name="output_format" size="3">'."\n";
1364: my $default = 'html';
1365: if (exists($env{'form.output_format'})) {
1366: $default = $env{'form.output_format'}
1367: } else {
1368: $env{'form.output_format'} = $default;
1369: }
1370: foreach ($self->output_options()) {
1371: $output_selector.='<option value="'.$_->{'value'}.'"';
1372: if ($_->{'value'} eq $default) {
1373: $output_selector .= ' selected';
1374: }
1375: $output_selector .= ">".&mt($_->{'description'})."</option>\n";
1376: }
1377: $output_selector .= "</select>\n";
1378: return $output_selector;
1379: }
1380:
1381: ################################################
1382: ## Excel output routines ##
1383: ################################################
1384: sub excel_output_row {
1385: my $self = shift;
1386: my ($worksheet,$rownum,$rows_output,@prepend) = @_;
1387: my $cols_output = 0;
1388: #
1389: my @rowdata = $self->get_row($rownum);
1390: foreach my $cell (@prepend,@rowdata) {
1391: my $value = $cell;
1392: $value = $cell->{'value'} if (ref($value));
1393: $value =~ s/\ / /gi;
1394: $worksheet->write($rows_output,$cols_output++,$value);
1395: }
1396: return;
1397: }
1398:
1399: #
1400: # This routine is just a stub
1401: sub outsheet_htmlclasslist {
1402: my $self = shift;
1403: my ($r) = @_;
1404: $r->print('<h2>'.&mt("This output is not supported").'</h2>');
1405: $r->rflush();
1406: return;
1407: }
1408:
1409: sub outsheet_excel {
1410: my $self = shift;
1411: my ($r) = @_;
1412: my $connection = $r->connection();
1413: #
1414: $r->print($self->html_report_error());
1415: $r->rflush();
1416: #
1417: $r->print("<h2>".&mt('Preparing Excel Spreadsheet')."</h2>");
1418: #
1419: # Create excel workbook
1420: my ($workbook,$filename,$format)=&Apache::loncommon::create_workbook($r);
1421: return if (! defined($workbook));
1422: #
1423: # Create main worksheet
1424: my $worksheet = $workbook->addworksheet('main');
1425: my $rows_output = 0;
1426: my $cols_output = 0;
1427: #
1428: # Write excel header
1429: foreach my $value ($self->get_title()) {
1430: $cols_output = 0;
1431: $worksheet->write($rows_output++,$cols_output,$value,$format->{'h1'});
1432: }
1433: $rows_output++; # skip a line
1434: #
1435: # Write summary/export row
1436: $cols_output = 0;
1437: $self->excel_output_row($worksheet,0,$rows_output++,'Summary',
1438: $format->{'b'});
1439: $rows_output++; # skip a line
1440: #
1441: $self->excel_rows($connection,$worksheet,$cols_output,$rows_output,
1442: $format);
1443: #
1444: #
1445: # Close the excel file
1446: $workbook->close();
1447: #
1448: # Write a link to allow them to download it
1449: $r->print('<br />'.
1450: '<a href="'.$filename.'">Your Excel spreadsheet.</a>'."\n");
1451: return;
1452: }
1453:
1454: #################################
1455: ## CSV output routines ##
1456: #################################
1457: sub outsheet_csv {
1458: my $self = shift;
1459: my ($r) = @_;
1460: my $connection = $r->connection();
1461: #
1462: $r->print($self->html_report_error());
1463: $r->rflush();
1464: #
1465: my $csvdata = '';
1466: my @Values;
1467: #
1468: # Open the csv file
1469: my $filename = '/prtspool/'.
1470: $env{'user.name'}.'_'.$env{'user.domain'}.'_'.
1471: time.'_'.rand(1000000000).'.csv';
1472: my $file;
1473: unless ($file = Apache::File->new('>'.'/home/httpd'.$filename)) {
1474: $r->log_error("Couldn't open $filename for output $!");
1475: $r->print(&mt("Problems occured in writing the csv file. ".
1476: "This error has been logged. ".
1477: "Please alert your LON-CAPA administrator."));
1478: $r->print("<pre>\n".$csvdata."</pre>\n");
1479: return 0;
1480: }
1481: #
1482: # Output the title information
1483: foreach my $value ($self->get_title()) {
1484: print $file "'".&Apache::loncommon::csv_translate($value)."'\n";
1485: }
1486: #
1487: # Output the body of the spreadsheet
1488: $self->csv_rows($connection,$file);
1489: #
1490: # Close the csv file
1491: close($file);
1492: $r->print('<br /><br />'.
1493: '<a href="'.$filename.'">'.&mt('Your CSV spreadsheet.').'</a>'."\n");
1494: #
1495: return 1;
1496: }
1497:
1498: sub csv_output_row {
1499: my $self = shift;
1500: my ($filehandle,$rownum,@prepend) = @_;
1501: #
1502: my @rowdata = ();
1503: if (defined($rownum)) {
1504: @rowdata = $self->get_row($rownum);
1505: }
1506: my @output = ();
1507: foreach my $cell (@prepend,@rowdata) {
1508: my $value = $cell;
1509: $value = $cell->{'value'} if (ref($value));
1510: $value =~ s/\ / /gi;
1511: $value = "'".$value."'";
1512: push (@output,$value);
1513: }
1514: print $filehandle join(',',@output )."\n";
1515: return;
1516: }
1517:
1518: ############################################
1519: ## XML output routines ##
1520: ############################################
1521: sub outsheet_xml {
1522: my $self = shift;
1523: my ($r) = @_;
1524: ## Someday XML
1525: ## Will be rendered for the user
1526: ## But not on this day
1527: my $Str = '<spreadsheet type="'.$self->{'type'}.'">'."\n";
1528: while (my ($cell,$formula) = each(%{$self->{'formulas'}})) {
1529: if ($cell =~ /^template_(\w+)/) {
1530: my $col = $1;
1531: $Str .= '<template col="'.$col.'">'.$formula.'</template>'."\n";
1532: } else {
1533: my ($col,$row) = ($cell =~ /^([A-z])(\d+)/);
1534: next if (! defined($row) || ! defined($col));
1535: next if ($row != 0);
1536: $Str .=
1537: '<field row="'.$row.'" col="'.$col.'" >'.$formula.'</field>'
1538: ."\n";
1539: }
1540: }
1541: $Str.="</spreadsheet>";
1542: $r->print("<pre>\n\n\n".$Str."\n\n\n</pre>");
1543: return $Str;
1544: }
1545:
1546: ############################################
1547: ### Filesystem routines ###
1548: ############################################
1549: sub parse_sheet {
1550: # $sheetxml is a scalar reference or a scalar
1551: my ($sheetxml) = @_;
1552: if (! ref($sheetxml)) {
1553: my $tmp = $sheetxml;
1554: $sheetxml = \$tmp;
1555: }
1556: my %formulas;
1557: my %sources;
1558: my $parser=HTML::TokeParser->new($sheetxml);
1559: my $token;
1560: while ($token=$parser->get_token) {
1561: if ($token->[0] eq 'S') {
1562: if ($token->[1] eq 'field') {
1563: my $cell = $token->[2]->{'col'}.$token->[2]->{'row'};
1564: my $source = $token->[2]->{'source'};
1565: my $formula = $parser->get_text('/field');
1566: $formulas{$cell} = $formula;
1567: $sources{$cell} = $source if (defined($source));
1568: $parser->get_text('/field');
1569: } elsif ($token->[1] eq 'template') {
1570: $formulas{'template_'.$token->[2]->{'col'}}=
1571: $parser->get_text('/template');
1572: }
1573: }
1574: }
1575: return (\%formulas,\%sources);
1576: }
1577:
1578: {
1579:
1580: my %spreadsheets;
1581:
1582: sub clear_spreadsheet_definition_cache {
1583: undef(%spreadsheets);
1584: }
1585:
1586: sub load_system_default_sheet {
1587: my $self = shift;
1588: my $includedir = $Apache::lonnet::perlvar{'lonIncludes'};
1589: # load in the default defined spreadsheet
1590: my $sheetxml='';
1591: my $fh;
1592: if ($fh=Apache::File->new($includedir.'/default_'.$self->{'type'})) {
1593: $sheetxml=join('',<$fh>);
1594: $fh->close();
1595: } else {
1596: # $sheetxml='<field row="0" col="A">"Error"</field>';
1597: $sheetxml='<field row="0" col="A"></field>';
1598: }
1599: $self->filename('default_');
1600: my ($formulas,undef) = &parse_sheet(\$sheetxml);
1601: return $formulas;
1602: }
1603:
1604: sub load {
1605: my $self = shift;
1606: #
1607: my $stype = $self->{'type'};
1608: my $cnum = $self->{'cnum'};
1609: my $cdom = $self->{'cdom'};
1610: #
1611: my $filename = $self->filename();
1612: my $cachekey = join('_',($cnum,$cdom,$stype,$filename));
1613: #
1614: # see if sheet is cached
1615: my ($formulas);
1616: if (exists($spreadsheets{$cachekey})) {
1617: $formulas = $spreadsheets{$cachekey}->{'formulas'};
1618: $self->formulas($formulas);
1619: $self->{'row_source'}=$spreadsheets{$cachekey}->{'row_source'};
1620: $self->{'row_numbers'}=$spreadsheets{$cachekey}->{'row_numbers'};
1621: $self->{'maxrow'}=$spreadsheets{$cachekey}->{'maxrow'};
1622: } else {
1623: # Not cached, need to read
1624: if (! defined($filename)) {
1625: $formulas = $self->load_system_default_sheet();
1626: } elsif($filename =~ /^\/res\/.*\.spreadsheet$/) {
1627: # Load a spreadsheet definition file
1628: my $sheetxml=&Apache::lonnet::getfile
1629: (&Apache::lonnet::filelocation('',$filename));
1630: if ($sheetxml == -1) {
1631: $sheetxml='<field row="0" col="A">"Error loading spreadsheet '
1632: .$self->filename().'"</field>';
1633: }
1634: ($formulas,undef) = &parse_sheet(\$sheetxml);
1635: # Get just the filename and set the sheets filename
1636: my ($newfilename) = ($filename =~ /\/([^\/]*)\.spreadsheet$/);
1637: if ($self->is_default()) {
1638: $self->filename($newfilename);
1639: $self->make_default();
1640: } else {
1641: $self->filename($newfilename);
1642: }
1643: } else {
1644: # Load the spreadsheet definition file from the save file
1645: my %tmphash = &Apache::lonnet::dump($filename,$cdom,$cnum);
1646: my ($tmp) = keys(%tmphash);
1647: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
1648: while (my ($cell,$formula) = each(%tmphash)) {
1649: $formulas->{$cell}=$formula;
1650: }
1651: } else {
1652: $formulas = $self->load_system_default_sheet();
1653: }
1654: }
1655: $filename=$self->filename(); # filename may have changed
1656: $cachekey = join('_',($cnum,$cdom,$stype,$filename));
1657: %{$spreadsheets{$cachekey}->{'formulas'}} = %{$formulas};
1658: $self->formulas($formulas);
1659: $self->set_row_sources();
1660: $self->set_row_numbers();
1661: %{$spreadsheets{$cachekey}->{'row_source'}} = %{$self->{'row_source'}};
1662: %{$spreadsheets{$cachekey}->{'row_numbers'}} = %{$self->{'row_numbers'}};
1663: $spreadsheets{$cachekey}->{'maxrow'} = $self->{'maxrow'};
1664: }
1665: }
1666:
1667: sub set_row_sources {
1668: my $self = shift;
1669: while (my ($cell,$value) = each(%{$self->{'formulas'}})) {
1670: next if ($cell !~ /^A(\d+)/ || $1 < 1);
1671: my $row = $1;
1672: $self->{'row_source'}->{$row} = $value;
1673: }
1674: return;
1675: }
1676:
1677: sub set_row_numbers {
1678: my $self = shift;
1679: while (my ($cell,$value) = each(%{$self->{'formulas'}})) {
1680: next if ($cell !~ /^A(\d+)$/);
1681: next if (! defined($value));
1682: $self->{'row_numbers'}->{$value} = $1;
1683: $self->{'maxrow'} = $1 if ($1 > $self->{'maxrow'});
1684: }
1685: }
1686:
1687: ##
1688: ## exportrow is *not* used to get the export row from a computed sub-sheet.
1689: ##
1690: sub exportrow {
1691: my $self = shift;
1692: if (exists($self->{'badcalc'}) && $self->{'badcalc'}) {
1693: return ();
1694: }
1695: my @exportarray;
1696: foreach my $column (@UC_Columns) {
1697: push(@exportarray,$self->value($column.'0'));
1698: }
1699: return @exportarray;
1700: }
1701:
1702: sub save {
1703: my $self = shift;
1704: my ($makedef)=@_;
1705: my $cid=$self->{'cid'};
1706: # If we are saving it, it must not be temporary
1707: $self->temporary(0);
1708: if (&Apache::lonnet::allowed('opa',$cid)) {
1709: my %f=$self->formulas();
1710: my $stype = $self->{'type'};
1711: my $cnum = $self->{'cnum'};
1712: my $cdom = $self->{'cdom'};
1713: my $filename = $self->{'filename'};
1714: my $cachekey = join('_',($cnum,$cdom,$stype,$filename));
1715: # Cache new sheet
1716: %{$spreadsheets{$cachekey}->{'formulas'}}=%f;
1717: # Write sheet
1718: foreach (keys(%f)) {
1719: delete($f{$_}) if ($f{$_} eq 'import');
1720: }
1721: my $reply = &Apache::lonnet::put($filename,\%f,$cdom,$cnum);
1722: return $reply if ($reply ne 'ok');
1723: $reply = &Apache::lonnet::put($stype.'_spreadsheets',
1724: {$filename => $env{'user.name'}.'@'.$env{'user.domain'}},
1725: $cdom,$cnum);
1726: return $reply if ($reply ne 'ok');
1727: if ($makedef) {
1728: $reply = &Apache::lonnet::put('environment',
1729: {'spreadsheet_default_'.$stype => $filename },
1730: $cdom,$cnum);
1731: return $reply if ($reply ne 'ok');
1732: }
1733: if ($self->is_default()) {
1734: if ($self->{'type'} eq 'studentcalc') {
1735: &Apache::lonnet::expirespread('','','studentcalc','');
1736: } elsif ($self->{'type'} eq 'assesscalc') {
1737: &Apache::lonnet::expirespread('','','assesscalc','');
1738: &Apache::lonnet::expirespread('','','studentcalc','');
1739: }
1740: }
1741: return $reply;
1742: }
1743: return 'unauthorized';
1744: }
1745:
1746: } # end of scope for %spreadsheets
1747:
1748: sub save_tmp {
1749: my $self = shift;
1750: my $filename=$env{'user.name'}.'_'.
1751: $env{'user.domain'}.'_spreadsheet_'.$self->{'symb'}.'_'.
1752: $self->{'filename'};
1753: $filename=~s/\W/\_/g;
1754: $filename=$Apache::lonnet::tmpdir.$filename.'.tmp';
1755: $self->temporary(1);
1756: my $fh;
1757: if ($fh=Apache::File->new('>'.$filename)) {
1758: my %f = $self->formulas();
1759: while( my ($cell,$formula) = each(%f)) {
1760: next if ($formula eq 'import');
1761: print $fh &Apache::lonnet::escape($cell)."=".
1762: &Apache::lonnet::escape($formula)."\n";
1763: }
1764: $fh->close();
1765: }
1766: }
1767:
1768: sub load_tmp {
1769: my $self = shift;
1770: my $filename=$env{'user.name'}.'_'.
1771: $env{'user.domain'}.'_spreadsheet_'.$self->{'symb'}.'_'.
1772: $self->{'filename'};
1773: $filename=~s/\W/\_/g;
1774: $filename=$Apache::lonnet::tmpdir.$filename.'.tmp';
1775: my %formulas = ();
1776: if (my $spreadsheet_file = Apache::File->new($filename)) {
1777: while (<$spreadsheet_file>) {
1778: chomp;
1779: my ($cell,$formula) = split(/=/);
1780: $cell = &Apache::lonnet::unescape($cell);
1781: $formula = &Apache::lonnet::unescape($formula);
1782: $formulas{$cell} = $formula;
1783: }
1784: $spreadsheet_file->close();
1785: }
1786: # flag the sheet as temporary
1787: $self->temporary(1);
1788: $self->formulas(\%formulas);
1789: $self->set_row_sources();
1790: $self->set_row_numbers();
1791: return;
1792: }
1793:
1794: sub temporary {
1795: my $self=shift;
1796: if (@_) {
1797: ($self->{'temporary'})= @_;
1798: }
1799: return $self->{'temporary'};
1800: }
1801:
1802: sub modify_cell {
1803: # studentcalc overrides this
1804: my $self = shift;
1805: my ($cell,$formula) = @_;
1806: if ($cell =~ /([A-z])\-/) {
1807: $cell = 'template_'.$1;
1808: } elsif ($cell !~ /^([A-z](\d+)|template_[A-z])$/) {
1809: return;
1810: }
1811: $self->set_formula($cell,$formula);
1812: $self->rebuild_stats();
1813: return;
1814: }
1815:
1816: ###########################################
1817: # othersheets: Returns the list of other spreadsheets available
1818: ###########################################
1819: sub othersheets {
1820: my $self = shift();
1821: my ($stype) = @_;
1822: $stype = $self->{'type'} if (! defined($stype) || $stype !~ /calc$/);
1823: #
1824: my @alternatives=();
1825: my %results=&Apache::lonnet::dump($stype.'_spreadsheets',
1826: $self->{'cdom'}, $self->{'cnum'});
1827: my ($tmp) = keys(%results);
1828: if ($tmp =~ /^(con_lost|error|no_such_host)/i ) {
1829: @alternatives = (&mt('Default'));
1830: } else {
1831: @alternatives = (&mt('Default'), sort (keys(%results)));
1832: }
1833: return @alternatives;
1834: }
1835:
1836: sub blackout {
1837: my $self = shift;
1838: $self->{'blackout'} = $_[0] if (@_);
1839: return $self->{'blackout'};
1840: }
1841:
1842: sub get_row {
1843: my $self = shift;
1844: my ($n)=@_;
1845: my @cols=();
1846: foreach my $col (@UC_Columns,@LC_Columns) {
1847: my $cell = $col.$n;
1848: push(@cols,{ name => $cell,
1849: formula => $self->formula($cell),
1850: value => $self->value($cell)});
1851: }
1852: return @cols;
1853: }
1854:
1855: sub get_template_row {
1856: my $self = shift;
1857: my @cols=();
1858: foreach my $col (@UC_Columns,@LC_Columns) {
1859: my $cell = 'template_'.$col;
1860: push(@cols,{ name => $cell,
1861: formula => $self->formula($cell),
1862: value => $self->formula($cell) });
1863: }
1864: return @cols;
1865: }
1866:
1867: sub need_to_save {
1868: my $self = shift;
1869: if ($self->{'new_rows'} && ! $self->temporary()) {
1870: return 1;
1871: }
1872: return 0;
1873: }
1874:
1875: sub get_row_number_from_key {
1876: my $self = shift;
1877: my ($key) = @_;
1878: if (! exists($self->{'row_numbers'}->{$key}) ||
1879: ! defined($self->{'row_numbers'}->{$key})) {
1880: # I used to set $f here to the new value, but the key passed for lookup
1881: # may not be the key we need to save
1882: $self->{'maxrow'}++;
1883: $self->{'row_numbers'}->{$key} = $self->{'maxrow'};
1884: # $self->logthis('added row '.$self->{'row_numbers'}->{$key}.
1885: # ' for '.$key);
1886: $self->{'new_rows'} = 1;
1887: }
1888: return $self->{'row_numbers'}->{$key};
1889: }
1890:
1891: 1;
1892:
1893: __END__
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