1: #
2: # $Id: Spreadsheet.pm,v 1.46 2005/05/13 21:14:46 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: chome => $env{'course.'.$env{'request.course.id'}.'.home'},
110: coursedesc => $env{'course.'.$env{'request.course.id'}.'.description'},
111: coursefilename => $env{'request.course.fn'},
112: #
113: # Flags
114: temporary => 0, # true if this sheet has been modified but not saved
115: new_rows => 0, # true if this sheet has new rows
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: $self->{'uhome'} = &Apache::lonnet::homeserver($name,$domain);
130: #
131: bless($self,$class);
132: #
133: # Load in the spreadsheet definition
134: $self->filename($filename);
135: if (exists($env{'form.workcopy'}) &&
136: $self->{'type'} eq $env{'form.workcopy'}) {
137: $self->load_tmp();
138: } else {
139: $self->load();
140: }
141: return $self;
142: }
143:
144: ######################################################
145:
146: =pod
147:
148: =item &filename
149:
150: get or set the filename for a spreadsheet.
151:
152: =cut
153:
154: ######################################################
155: sub filename {
156: my $self = shift();
157: if (@_) {
158: my ($newfilename) = @_;
159: if (! defined($newfilename) || $newfilename eq 'Default' ||
160: $newfilename !~ /\w/ || $newfilename eq '') {
161: my $key = 'course.'.$self->{'cid'}.'.spreadsheet_default_'.
162: $self->{'type'};
163: if (exists($env{$key}) && $env{$key} ne '') {
164: $newfilename = $env{$key};
165: } else {
166: $newfilename = 'default_'.$self->{'type'};
167: }
168: }
169: if ($newfilename !~ /\w/ || $newfilename =~ /^\W*$/) {
170: $newfilename = 'default_'.$self->{'type'};
171: }
172: if ($newfilename !~ /^default\.$self->{'type'}$/ &&
173: $newfilename !~ /^\/res\/(.*)spreadsheet$/) {
174: if ($newfilename !~ /_$self->{'type'}$/) {
175: $newfilename =~ s/[\s_]*$//;
176: $newfilename .= '_'.$self->{'type'};
177: }
178: }
179: $self->{'filename'} = $newfilename;
180: return;
181: }
182: return $self->{'filename'};
183: }
184:
185: ######################################################
186:
187: =pod
188:
189: =item &make_default()
190:
191: Make the current spreadsheet file the default for the course. Expires all the
192: default spreadsheets.......!
193:
194: =cut
195:
196: ######################################################
197: sub make_default {
198: my $self = shift();
199: my $result = &Apache::lonnet::put('environment',
200: {'spreadsheet_default_'.$self->{'type'} => $self->filename()},
201: $self->{'cdom'},$self->{'cnum'});
202: return $result if ($result ne 'ok');
203: my $symb = $self->{'symb'};
204: $symb = '' if (! defined($symb));
205: &Apache::lonnet::expirespread('','',$self->{'type'},$symb);
206: }
207:
208: ######################################################
209:
210: =pod
211:
212: =item &is_default()
213:
214: Returns 1 if the current spreadsheet is the default as specified in the
215: course environment. Returns 0 otherwise.
216:
217: =cut
218:
219: ######################################################
220: sub is_default {
221: my $self = shift;
222: # Check to find out if we are the default spreadsheet (filenames match)
223: my $default_filename = '';
224: my %tmphash = &Apache::lonnet::get('environment',
225: ['spreadsheet_default_'.
226: $self->{'type'}],
227: $self->{'cdom'},
228: $self->{'cnum'});
229: my ($tmp) = keys(%tmphash);
230: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
231: $default_filename = $tmphash{'spreadsheet_default_'.$self->{'type'}};
232: }
233: if ($default_filename =~ /^\s*$/) {
234: $default_filename = 'default_'.$self->{'type'};
235: }
236: return 1 if ($self->filename() eq $default_filename);
237: return 0;
238: }
239:
240: sub initialize {
241: # This method is here to remind you that it will be overridden by
242: # the descendents of the spreadsheet class.
243: }
244:
245: sub clear_package {
246: # This method is here to remind you that it will be overridden by
247: # the descendents of the spreadsheet class.
248: }
249:
250: sub cleanup {
251: my $self = shift();
252: $self->clear_package();
253: }
254:
255: sub initialize_spreadsheet_package {
256: &load_spreadsheet_expirationdates();
257: &clear_spreadsheet_definition_cache();
258: }
259:
260: sub load_spreadsheet_expirationdates {
261: undef %expiredates;
262: my $cid=$env{'request.course.id'};
263: my @tmp = &Apache::lonnet::dump('nohist_expirationdates',
264: $env{'course.'.$cid.'.domain'},
265: $env{'course.'.$cid.'.num'});
266: if (lc($tmp[0]) !~ /^error/){
267: %expiredates = @tmp;
268: }
269: }
270:
271: sub check_expiration_time {
272: my $self = shift;
273: my ($time)=@_;
274: return 0 if (! defined($time));
275: my ($key1,$key2,$key3,$key4,$key5);
276: # Description of keys
277: #
278: # key1: all sheets of this type have expired
279: # key2: all sheets of this type for this student
280: # key3: all sheets of this type in this map for this student
281: # key4: this assessment sheet for this student
282: # key5: this assessment sheet for all students
283: $key1 = '::'.$self->{'type'}.':';
284: $key2 = $self->{'name'}.':'.$self->{'domain'}.':'.$self->{'type'}.':';
285: $key3 = $key2.$self->{'container'} if (defined($self->{'container'}));
286: $key4 = $key2.$self->{'symb'} if (defined($self->{'symb'}));
287: $key5 = $key1.$self->{'symb'} if (defined($self->{'symb'}));
288: my $returnvalue = 1; # default to okay
289: foreach my $key ($key1,$key2,$key3,$key4,$key5) {
290: next if (! defined($key));
291: if (exists($expiredates{$key}) && $expiredates{$key} > $time) {
292: $returnvalue = 0; # need to recompute
293: }
294: }
295: return $returnvalue;
296: }
297:
298: ######################################################
299:
300: =pod
301:
302: =item &initialize_safe_space
303:
304: Returns the safe space required by a Spreadsheet object.
305:
306: =head 2 Safe Space Functions
307:
308: =over 4
309:
310: =cut
311:
312: ######################################################
313: {
314:
315: my $safeeval;
316:
317: sub initialize_safe_space {
318: my $self = shift;
319: my $usection = &Apache::lonnet::getsection($self->{'domain'},
320: $self->{'name'},
321: $env{'request.course.id'});
322: if (! defined($safeeval)) {
323: $safeeval = new Safe(shift);
324: my $safehole = new Safe::Hole;
325: $safeeval->permit("entereval");
326: $safeeval->permit(":base_math");
327: $safeeval->permit("sort");
328: $safeeval->deny(":base_io");
329: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&Apache::lonnet::EXT');
330: $safehole->wrap(\&mask,$safeeval,'&mask');
331: $safehole->wrap(\&Apache::lonnet::logthis,$safeeval,'&logthis');
332: $safeeval->share('$@');
333: # Holds the (computed, final) values for the sheet
334: # This is only written to by &calc, the spreadsheet computation routine.
335: # It is read by many functions
336: $safeeval->share('%sheet_values');
337: my $code=<<'ENDDEFS';
338: # ---------------------------------------------------- Inside of the safe space
339: #
340: # f: formulas
341: # t: intermediate format (variable references expanded)
342: # v: output values
343: # c: preloaded constants (A-column)
344: # rl: row label
345: # os: other spreadsheets (for student spreadsheet only)
346: undef %t; # Holds the forumlas of the spreadsheet to be computed. Set in
347: # &sett, which does the translation of strings like C5 into the value
348: # in C5. Used in &calc - %t holds the values that are actually eval'd.
349: undef %f; # Holds the formulas for each cell. This is the users
350: # (spreadsheet authors) data for each cell.
351: undef %c; # Holds the constants for a sheet. In the assessment
352: # sheets, this is the A column. Used in &MINPARM, &MAXPARM, &expandnamed,
353: # &sett, and &constants. There is no &getconstants.
354: # &constants is called by &loadstudent, &loadcourse, &load assessment,
355: undef @os; # Holds the names of other spreadsheets - this is used to specify
356: # the spreadsheets that are available for the assessment sheet.
357: # Set by &setothersheets. &setothersheets is called by &handler. A
358: # related subroutine is &othersheets.
359: $errorlog = '';
360: #
361: $maxrow = 0;
362: $type = '';
363: #
364: # filename/reference of the sheet
365: $filename = '';
366: #
367: # user data
368: $name = '';
369: $uhome = '';
370: $domain = '';
371: #
372: # course data
373: $csec = '';
374: $chome= '';
375: $cnum = '';
376: $cdom = '';
377: $cid = '';
378: $coursefilename = '';
379: #
380: # symb
381: $usymb = '';
382: #
383: # error messages
384: $errormsg = '';
385: #
386: #-------------------------------------------------------
387:
388: =pod
389:
390: =item EXT(parameter)
391:
392: Calls the system EXT function to determine the value of the given parameter.
393:
394: =cut
395:
396: #-------------------------------------------------------
397: sub EXT {
398: my ($parameter) = @_;
399: return '' if (! defined($parameter) || $parameter eq '');
400: $parameter =~ s/^parameter\./resource\./;
401: my $value = &Apache::lonnet::EXT($parameter,$symb,$domain,$name,$usection);
402: return $value;
403: }
404:
405: #-------------------------------------------------------
406:
407: =pod
408:
409: =item NUM(range)
410:
411: returns the number of items in the range.
412:
413: =cut
414:
415: #-------------------------------------------------------
416: sub NUM {
417: my $values=&get_values(@_);
418: my $num= scalar(@$values);
419: return $num;
420: }
421:
422: #-------------------------------------------------------
423:
424: =pod
425:
426: =item BIN(low,high,lower,upper)
427:
428: =cut
429:
430: #-------------------------------------------------------
431: sub BIN {
432: my ($low,$high,$lower,$upper)=@_;
433: my $values=&get_values($lower,$upper);
434: my $num=0;
435: foreach (@$values) {
436: if (($_>=$low) && ($_<=$high)) {
437: $num++;
438: }
439: }
440: return $num;
441: }
442:
443: #-------------------------------------------------------
444:
445: =pod
446:
447: =item SUM(range)
448:
449: returns the sum of items in the range.
450:
451: =cut
452:
453: #-------------------------------------------------------
454: sub SUM {
455: my $values=&get_values(@_);
456: my $sum=0;
457: foreach (@$values) {
458: $sum+=$_;
459: }
460: return $sum;
461: }
462:
463: #-------------------------------------------------------
464:
465: =pod
466:
467: =item MEAN(range)
468:
469: compute the average of the items in the range.
470:
471: =cut
472:
473: #-------------------------------------------------------
474: sub MEAN {
475: my $values=&get_values(@_);
476: my $sum=0;
477: my $num=0;
478: foreach (@$values) {
479: $sum+=$_;
480: $num++;
481: }
482: if ($num) {
483: return $sum/$num;
484: } else {
485: return undef;
486: }
487: }
488:
489: #-------------------------------------------------------
490:
491: =pod
492:
493: =item STDDEV(range)
494:
495: compute the standard deviation of the items in the range.
496:
497: =cut
498:
499: #-------------------------------------------------------
500: sub STDDEV {
501: my $values=&get_values(@_);
502: my $sum=0; my $num=0;
503: foreach (@$values) {
504: $sum+=$_;
505: $num++;
506: }
507: unless ($num>1) { return undef; }
508: my $mean=$sum/$num;
509: $sum=0;
510: foreach (@$values) {
511: $sum+=($_-$mean)**2;
512: }
513: return sqrt($sum/($num-1));
514: }
515:
516: #-------------------------------------------------------
517:
518: =pod
519:
520: =item PROD(range)
521:
522: compute the product of the items in the range.
523:
524: =cut
525:
526: #-------------------------------------------------------
527: sub PROD {
528: my $values=&get_values(@_);
529: my $prod=1;
530: foreach (@$values) {
531: $prod*=$_;
532: }
533: return $prod;
534: }
535:
536: #-------------------------------------------------------
537:
538: =pod
539:
540: =item MAX(range)
541:
542: compute the maximum of the items in the range.
543:
544: =cut
545:
546: #-------------------------------------------------------
547: sub MAX {
548: my $values=&get_values(@_);
549: my $max='-';
550: foreach (@$values) {
551: if (($_>$max) || ($max eq '-')) {
552: $max=$_;
553: }
554: }
555: return $max;
556: }
557:
558: #-------------------------------------------------------
559:
560: =pod
561:
562: =item MIN(range)
563:
564: compute the minimum of the items in the range.
565:
566: =cut
567:
568: #-------------------------------------------------------
569: sub MIN {
570: my $values=&get_values(@_);
571: my $min='-';
572: foreach (@$values) {
573: if (($_<$min) || ($min eq '-')) {
574: $min=$_;
575: }
576: }
577: return $min;
578: }
579:
580: #-------------------------------------------------------
581:
582: =pod
583:
584: =item SUMMAX(num,lower,upper)
585:
586: compute the sum of the largest 'num' items in the range from
587: 'lower' to 'upper'
588:
589: =cut
590:
591: #-------------------------------------------------------
592: sub SUMMAX {
593: my ($num,$lower,$upper)=@_;
594: my $values=&get_values($lower,$upper);
595: my @inside=sort {$a <=> $b} (@$values);
596: my $sum=0; my $i;
597: for ($i=$#inside;(($i>$#inside-$num) && ($i>=0));$i--) {
598: $sum+=$inside[$i];
599: }
600: return $sum;
601: }
602:
603: #-------------------------------------------------------
604:
605: =pod
606:
607: =item SUMMIN(num,lower,upper)
608:
609: compute the sum of the smallest 'num' items in the range from
610: 'lower' to 'upper'
611:
612: =cut
613:
614: #-------------------------------------------------------
615: sub SUMMIN {
616: my ($num,$lower,$upper)=@_;
617: my $values=&get_values($lower,$upper);
618: my @inside=sort {$a <=> $b} (@$values);
619: my $sum=0; my $i;
620: for ($i=0;(($i<$num) && ($i<=$#inside));$i++) {
621: $sum+=$inside[$i];
622: }
623: return $sum;
624: }
625:
626: #-------------------------------------------------------
627:
628: =pod
629:
630: =item MINPARM(parametername)
631:
632: Returns the minimum value of the parameters matching the parametername.
633: parametername should be a string such as 'duedate'.
634:
635: =cut
636:
637: #-------------------------------------------------------
638: sub MINPARM {
639: my ($expression) = @_;
640: my $min = undef;
641: foreach $parameter (keys(%c)) {
642: next if ($parameter !~ /$expression/);
643: if ((! defined($min)) || ($min > $c{$parameter})) {
644: $min = $c{$parameter}
645: }
646: }
647: return $min;
648: }
649:
650: #-------------------------------------------------------
651:
652: =pod
653:
654: =item MAXPARM(parametername)
655:
656: Returns the maximum value of the parameters matching the input parameter name.
657: parametername should be a string such as 'duedate'.
658:
659: =cut
660:
661: #-------------------------------------------------------
662: sub MAXPARM {
663: my ($expression) = @_;
664: my $max = undef;
665: foreach $parameter (keys(%c)) {
666: next if ($parameter !~ /$expression/);
667: if ((! defined($min)) || ($max < $c{$parameter})) {
668: $max = $c{$parameter}
669: }
670: }
671: return $max;
672: }
673:
674: #-------------------------------------------------------
675:
676: =pod
677:
678: =item &get_values($lower,$upper)
679:
680: Inputs: $lower and $upper, cell names ("X12" or "a150") or globs ("X*").
681:
682: Returns: an array ref of the values of the cells that exist in the
683: speced range
684:
685: =cut
686:
687: #-------------------------------------------------------
688: sub get_values {
689: my ($lower,$upper)=@_;
690: $upper = $lower if (! defined($upper));
691: my @values;
692: my ($la,$ld) = ($lower=~/([A-z]|\*)(\d+|\*)/);
693: my ($ua,$ud) = ($upper=~/([A-z]|\*)(\d+|\*)/);
694: my ($alpha,$num);
695: if ($ld ne '*' && $ud ne '*') {
696: my @alpha;
697: if (($la eq '*') || ($ua eq '*')) {
698: @alpha=('A'..'z');
699: } else {
700: if ($la gt $ua) { ($la,$ua)=($ua,$la); }
701: if ((lc($la) ne $la) && (lc($ua) eq $ua)) {
702: @alpha=($la..'Z','a'..$ua);
703: } else {
704: @alpha=($la..$ua);
705: }
706: }
707: my @num=($ld..$ud);
708: foreach my $a (@alpha) {
709: foreach my $n (@num) {
710: if (exists($sheet_values{$a.$n})) {
711: push(@values,$sheet_values{$a.$n});
712: }
713: }
714: }
715: return \@values;
716: } else {
717: $num = '(\d+)';
718: }
719: if (($la eq '*') || ($ua eq '*')) {
720: $alpha='[A-z]';
721: } else {
722: if ($la gt $ua) { ($la,$ua)=($ua,$la); }
723: $alpha=qq/[$la-$ua]/;
724: }
725: my $expression = '^'.$alpha.$num.'$';
726: foreach (grep /$expression/,keys(%sheet_values)) {
727: push(@values,$sheet_values{$_});
728: }
729: return \@values;
730: }
731:
732: sub calc {
733: my $notfinished = 1;
734: my $lastcalc = '';
735: my $depth = 0;
736: while ($notfinished) {
737: $notfinished=0;
738: while (my ($cell,$value) = each(%t)) {
739: my $old=$sheet_values{$cell};
740: $sheet_values{$cell}=eval $value;
741: # $errorlog .= $cell.' = '.$old.'->'.$sheet_values{$cell}."\n";
742: if ($@) {
743: undef %sheet_values;
744: return $cell.': '.$@;
745: }
746: if ($sheet_values{$cell} ne $old) {
747: $notfinished=1;
748: $lastcalc=$cell;
749: }
750: }
751: # $errorlog.="------------------------------------------------";
752:
753: $depth++;
754: if ($depth>100) {
755: undef %sheet_values;
756: return $lastcalc.': Maximum calculation depth exceeded';
757: }
758: }
759: return 'okay';
760: }
761:
762: # ------------------------------------------- End of "Inside of the safe space"
763: ENDDEFS
764: $safeeval->reval($code);
765: }
766: $self->{'safe'} = $safeeval;
767: $self->{'root'} = $self->{'safe'}->root();
768: #
769: # Place some of the %$self items into the safe space except the safe space
770: # itself
771: my $initstring = '';
772: foreach (qw/name domain type symb cid csec coursefilename
773: cnum cdom chome uhome/) {
774: $initstring.= qq{\$$_="$self->{$_}";};
775: }
776: $initstring.=qq{\$usection="$usection";};
777: $self->{'safe'}->reval($initstring);
778: return $self;
779: }
780:
781: }
782:
783: ######################################################
784:
785: =pod
786:
787: =back
788:
789: =cut
790:
791: ######################################################
792:
793: ##
794: ## sub add_hash_to_safe {} # spreadsheet, would like to destroy
795: ##
796:
797: #
798: # expandnamed used to reside in the safe space
799: #
800: sub expandnamed {
801: my $self = shift;
802: my $expression=shift;
803: if ($expression=~/^\&/) {
804: my ($func,$var,$formula)=($expression=~/^\&(\w+)\(([^\;]+)\;(.*)\)/);
805: my @vars=split(/\W+/,$formula);
806: my %values=();
807: foreach my $varname ( @vars ) {
808: if ($varname=~/^(parameter|stores|timestamp)/) {
809: $formula=~s/$varname/'$c{\''.$varname.'\'}'/ge;
810: $varname=~s/$var/\([\\w:\\- ]\+\)/g;
811: foreach (keys(%{$self->{'constants'}})) {
812: if ($_=~/$varname/) {
813: $values{$1}=1;
814: }
815: }
816: }
817: }
818: if ($func eq 'EXPANDSUM') {
819: my $result='';
820: foreach (keys(%values)) {
821: my $thissum=$formula;
822: $thissum=~s/$var/$_/g;
823: $result.=$thissum.'+';
824: }
825: $result=~s/\+$//;
826: return $result;
827: } else {
828: return 0;
829: }
830: } else {
831: # it is not a function, so it is a parameter name
832: # We should do the following:
833: # 1. Take the list of parameter names
834: # 2. look through the list for ones that match the parameter we want
835: # 3. If there are no collisions, return the one that matches
836: # 4. If there is a collision, return 'bad parameter name error'
837: my $returnvalue = '';
838: my @matches = ();
839: my @values = ();
840: $#matches = -1;
841: while (my($parameter,$value) = each(%{$self->{'constants'}})) {
842: next if ($parameter !~ /$expression/);
843: push(@matches,$parameter);
844: push(@values,$value);
845: }
846: if (scalar(@matches) == 0) {
847: $returnvalue = '""';#'"unmatched parameter: '.$parameter.'"';
848: } elsif (scalar(@matches) == 1) {
849: # why do we not do this lookup here, instead of delaying it?
850: $returnvalue = $values[0];
851: } elsif (scalar(@matches) > 0) {
852: # more than one match. Look for a concise one
853: $returnvalue = "'non-unique parameter name : $expression'";
854: for (my $i=0; $i<=$#matches;$i++) {
855: if ($matches[$i] =~ /^$expression$/) {
856: # why do we not do this lookup here?
857: $returnvalue = $values[$i];
858: }
859: }
860: } else {
861: # There was a negative number of matches, which indicates
862: # something is wrong with reality. Better warn the user.
863: $returnvalue = '"bizzare parameter: '.$expression.'"';
864: }
865: return $returnvalue;
866: }
867: }
868:
869: sub sett {
870: my $self = shift;
871: my %t=();
872: undef(%Apache::Spreadsheet::sheet_values);
873: #
874: # Deal with the template row
875: foreach my $col ($self->template_cells()) {
876: next if ($col=~/^[A-Z]/);
877: foreach my $row ($self->rows()) {
878: # Get the name of this cell
879: my $cell=$col.$row;
880: # Grab the template declaration
881: $t{$cell}=$self->formula('template_'.$col);
882: # Replace '#' with the row number
883: $t{$cell}=~s/\#/$row/g;
884: # Replace '....' with ','
885: $t{$cell}=~s/\.\.+/\,/g;
886: # Replace 'A0' with the value from 'A0'
887: $t{$cell}=~s/(^|[^\"\'])([A-Za-z]\d+)/$1\$sheet_values\{\'$2\'\}/g;
888: # Replace parameters
889: $t{$cell}=~s/(^|[^\"\'])\[([^\]]+)\]/$1.$self->expandnamed($2)/ge;
890: }
891: }
892: #
893: # Deal with the normal cells
894: while (my($cell,$formula) = each(%{$self->{'formulas'}})) {
895: next if ($_=~/^template\_/);
896: my ($col,$row) = ($cell =~ /^([A-z])(\d+)$/);
897: if ($row eq '0') {
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: } elsif ( $col =~ /^[A-Z]$/ ) {
903: if ($formula !~ /^\!/ && exists($self->{'constants'}->{$cell})
904: && $self->{'constants'}->{$cell} ne '') {
905: $Apache::Spreadsheet::sheet_values{$cell}=
906: eval($self->{'constants'}->{$cell});
907: }
908: } else { # $row > 1 and $col =~ /[a-z]
909: $t{$cell}=$formula;
910: $t{$cell}=~s/\.\.+/\,/g;
911: $t{$cell}=~s/(^|[^\"\'])([A-Za-z]\d+)/$1\$sheet_values\{\'$2\'\}/g;
912: $t{$cell}=~s/(^|[^\"\'])\[([^\]]+)\]/$1.$self->expandnamed($2)/ge;
913: }
914: }
915: %{$self->{'safe'}->varglob('t')}=%t;
916: }
917:
918: ##
919: ## sync_safe_space: Called by calcsheet to make sure all the data we
920: # need to calculate is placed into the safe space
921: ##
922: sub sync_safe_space {
923: my $self = shift;
924: # Inside the safe space 'formulas' has a diabolical alter-ego named 'f'.
925: %{$self->{'safe'}->varglob('f')}=%{$self->{'formulas'}};
926: # 'constants' leads a peaceful hidden life of 'c'.
927: %{$self->{'safe'}->varglob('c')}=%{$self->{'constants'}};
928: # 'othersheets' hides as 'os', a disguise few can penetrate.
929: @{$self->{'safe'}->varglob('os')}=@{$self->{'othersheets'}};
930: }
931:
932: ##
933: ## Retrieve the error log from the safe space (used for debugging)
934: ##
935: sub get_errorlog {
936: my $self = shift;
937: $self->{'errorlog'} = $ { $self->{'safe'}->varglob('errorlog') };
938: return $self->{'errorlog'};
939: }
940:
941: ##
942: ## Clear the error log inside the safe space
943: ##
944: sub clear_errorlog {
945: my $self = shift;
946: $ {$self->{'safe'}->varglob('errorlog')} = '';
947: $self->{'errorlog'} = '';
948: }
949:
950: ##
951: ## constants: either set or get the constants
952: ##
953: sub constants {
954: my $self=shift;
955: my ($constants) = @_;
956: if (defined($constants)) {
957: if (! ref($constants)) {
958: my %tmp = @_;
959: $constants = \%tmp;
960: }
961: $self->{'constants'} = $constants;
962: return;
963: } else {
964: return %{$self->{'constants'}};
965: }
966: }
967:
968: ##
969: ## formulas: either set or get the formulas
970: ##
971: sub formulas {
972: my $self=shift;
973: my ($formulas) = @_;
974: if (defined($formulas)) {
975: if (! ref($formulas)) {
976: my %tmp = @_;
977: $formulas = \%tmp;
978: }
979: $self->{'formulas'} = $formulas;
980: $self->{'rows'} = [];
981: $self->{'template_cells'} = [];
982: return;
983: } else {
984: return %{$self->{'formulas'}};
985: }
986: }
987:
988: sub set_formula {
989: my $self = shift;
990: my ($cell,$formula) = @_;
991: $self->{'formulas'}->{$cell}=$formula;
992: return;
993: }
994:
995: ##
996: ## formulas_keys: Return the keys to the formulas hash.
997: ##
998: sub formulas_keys {
999: my $self = shift;
1000: my @keys = keys(%{$self->{'formulas'}});
1001: return keys(%{$self->{'formulas'}});
1002: }
1003:
1004: ##
1005: ## formula: Return the formula for a given cell in the spreadsheet
1006: ## returns '' if the cell does not have a formula or does not exist
1007: ##
1008: sub formula {
1009: my $self = shift;
1010: my $cell = shift;
1011: if (defined($cell) && exists($self->{'formulas'}->{$cell})) {
1012: return $self->{'formulas'}->{$cell};
1013: }
1014: return '';
1015: }
1016:
1017: ##
1018: ## logthis: write the input to lonnet.log
1019: ##
1020: sub logthis {
1021: my $self = shift;
1022: my $message = shift;
1023: &Apache::lonnet::logthis($self->{'type'}.':'.
1024: $self->{'name'}.':'.$self->{'domain'}.':'.
1025: $message);
1026: return;
1027: }
1028:
1029: ##
1030: ## dump_formulas_to_log: makes lonnet.log huge...
1031: ##
1032: sub dump_formulas_to_log {
1033: my $self =shift;
1034: $self->logthis("Spreadsheet formulas");
1035: $self->logthis("--------------------------------------------------------");
1036: while (my ($cell, $formula) = each(%{$self->{'formulas'}})) {
1037: $self->logthis(' '.$cell.' = '.$formula);
1038: }
1039: $self->logthis("--------------------------------------------------------");}
1040:
1041: ##
1042: ## value: returns the computed value of a particular cell
1043: ##
1044: sub value {
1045: my $self = shift;
1046: my $cell = shift;
1047: if (defined($cell) && exists($self->{'values'}->{$cell})) {
1048: return $self->{'values'}->{$cell};
1049: }
1050: return '';
1051: }
1052:
1053: ##
1054: ## dump_values_to_log: makes lonnet.log huge...
1055: ##
1056: sub dump_values_to_log {
1057: my $self =shift;
1058: $self->logthis("Spreadsheet Values");
1059: $self->logthis("------------------------------------------------------");
1060: while (my ($cell, $value) = each(%{$self->{'values'}})) {
1061: $self->logthis(' '.$cell.' = '.$value);
1062: }
1063: $self->logthis("------------------------------------------------------");
1064: }
1065:
1066: ##
1067: ## Yet another debugging function
1068: ##
1069: sub dump_hash_to_log {
1070: my $self= shift();
1071: my %tmp = @_;
1072: if (@_<2) {
1073: %tmp = %{$_[0]};
1074: }
1075: $self->logthis('---------------------------- (begin hash dump)');
1076: while (my ($key,$val) = each (%tmp)) {
1077: $self->logthis(' '.$key.' = '.$val.':');
1078: }
1079: $self->logthis('---------------------------- (finished hash dump)');
1080: }
1081:
1082: ##
1083: ## rebuild_stats: rebuilds the rows and template_cells arrays
1084: ##
1085: sub rebuild_stats {
1086: my $self = shift;
1087: $self->{'rows'}=[];
1088: $self->{'template_cells'}=[];
1089: while (my ($cell,$formula) = each(%{$self->{'formulas'}})) {
1090: push(@{$self->{'rows'}},$1) if ($cell =~ /^A(\d+)/ && $1 != 0);
1091: push(@{$self->{'template_cells'}},$1) if ($cell =~ /^template_(\w+)/);
1092: }
1093: return;
1094: }
1095:
1096: ##
1097: ## template_cells returns a list of the cells defined in the template row
1098: ##
1099: sub template_cells {
1100: my $self = shift;
1101: $self->rebuild_stats() if (! defined($self->{'template_cells'}) ||
1102: ! @{$self->{'template_cells'}});
1103: return @{$self->{'template_cells'}};
1104: }
1105:
1106: ##
1107: ## Sigh....
1108: ##
1109: sub setothersheets {
1110: my $self = shift;
1111: my @othersheets = @_;
1112: $self->{'othersheets'} = \@othersheets;
1113: }
1114:
1115: ##
1116: ## rows returns a list of the names of cells defined in the A column
1117: ##
1118: sub rows {
1119: my $self = shift;
1120: $self->rebuild_stats() if (!@{$self->{'rows'}});
1121: return @{$self->{'rows'}};
1122: }
1123:
1124: #
1125: # calcsheet: makes all the calls to compute the spreadsheet.
1126: #
1127: sub calcsheet {
1128: my $self = shift;
1129: $self->sync_safe_space();
1130: $self->clear_errorlog();
1131: $self->sett();
1132: my $result = $self->{'safe'}->reval('&calc();');
1133: # $self->logthis($self->get_errorlog());
1134: %{$self->{'values'}} = %{$self->{'safe'}->varglob('sheet_values')};
1135: # $self->logthis($self->get_errorlog());
1136: if ($result ne 'okay') {
1137: $self->set_calcerror($result);
1138: }
1139: return $result;
1140: }
1141:
1142: sub set_badcalc {
1143: my $self = shift();
1144: $self->{'badcalc'} =1;
1145: return;
1146: }
1147:
1148: sub badcalc {
1149: my $self = shift;
1150: if (exists($self->{'badcalc'}) && $self->{'badcalc'}) {
1151: return 1;
1152: } else {
1153: return 0;
1154: }
1155: }
1156:
1157: sub set_calcerror {
1158: my $self = shift;
1159: if (@_) {
1160: $self->set_badcalc();
1161: if (exists($self->{'calcerror'})) {
1162: $self->{'calcerror'}.="\n".$_[0];
1163: } else {
1164: $self->{'calcerror'}.=$_[0];
1165: }
1166: }
1167: }
1168:
1169: sub calcerror {
1170: my $self = shift;
1171: if ($self->badcalc()) {
1172: if (exists($self->{'calcerror'})) {
1173: return $self->{'calcerror'};
1174: }
1175: }
1176: return;
1177: }
1178:
1179: ###########################################################
1180: ##
1181: ## Output Helpers
1182: ##
1183: ###########################################################
1184: sub display {
1185: my $self = shift;
1186: my ($r) = @_;
1187: my $outputmode = 'html';
1188: foreach ($self->output_options()) {
1189: if ($env{'form.output_format'} eq $_->{'value'}) {
1190: $outputmode = $_->{'value'};
1191: last;
1192: }
1193: }
1194: if ($outputmode eq 'html') {
1195: $self->compute($r);
1196: $self->outsheet_html($r);
1197: } elsif ($outputmode eq 'htmlclasslist') {
1198: # No computation neccessary... This is kludgy
1199: $self->outsheet_htmlclasslist($r);
1200: } elsif ($outputmode eq 'excel') {
1201: $self->compute($r);
1202: $self->outsheet_excel($r);
1203: } elsif ($outputmode eq 'csv') {
1204: $self->compute($r);
1205: $self->outsheet_csv($r);
1206: } elsif ($outputmode eq 'xml') {
1207: # $self->compute($r);
1208: $self->outsheet_xml($r);
1209: }
1210: $self->cleanup();
1211: return;
1212: }
1213:
1214: ############################################
1215: ## HTML output routines ##
1216: ############################################
1217: sub html_report_error {
1218: my $self = shift();
1219: my $Str = '';
1220: if ($self->badcalc()) {
1221: $Str = '<h3 style="color:red">'.
1222: &mt('An error occurred while calculating this spreadsheet').
1223: "</h3>\n".
1224: '<pre>'.$self->calcerror()."</pre>\n";
1225: }
1226: return $Str;
1227: }
1228:
1229: sub html_export_row {
1230: my $self = shift();
1231: my ($color) = @_;
1232: $color = '#CCCCFF' if (! defined($color));
1233: my $allowed = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
1234: my $row_html;
1235: my @rowdata = $self->get_row(0);
1236: foreach my $cell (@rowdata) {
1237: if ($cell->{'name'} =~ /^[A-Z]/) {
1238: $row_html .= '<td bgcolor="'.$color.'">'.
1239: &html_editable_cell($cell,$color,$allowed).'</td>';
1240: } else {
1241: $row_html .= '<td bgcolor="#DDCCFF">'.
1242: &html_editable_cell($cell,'#DDCCFF',$allowed).'</td>';
1243: }
1244: }
1245: return $row_html;
1246: }
1247:
1248: sub html_template_row {
1249: my $self = shift();
1250: my $allowed = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
1251: my ($num_uneditable,$importcolor) = @_;
1252: my $row_html;
1253: my @rowdata = $self->get_template_row();
1254: my $count = 0;
1255: for (my $i = 0; $i<=$#rowdata; $i++) {
1256: my $cell = $rowdata[$i];
1257: if ($i < $num_uneditable) {
1258: $row_html .= '<td bgcolor="'.$importcolor.'">'.
1259: &html_uneditable_cell($cell,'#FFDDDD',$allowed).'</td>';
1260: } else {
1261: $row_html .= '<td bgcolor="#EOFFDD">'.
1262: &html_editable_cell($cell,'#EOFFDD',$allowed).'</td>';
1263: }
1264: }
1265: return $row_html;
1266: }
1267:
1268: sub html_editable_cell {
1269: my ($cell,$bgcolor,$allowed) = @_;
1270: my $result;
1271: my ($name,$formula,$value);
1272: if (defined($cell)) {
1273: $name = $cell->{'name'};
1274: $formula = $cell->{'formula'};
1275: $value = $cell->{'value'};
1276: }
1277: $name = '' if (! defined($name));
1278: $formula = '' if (! defined($formula));
1279: if (! defined($value)) {
1280: $value = '<font color="'.$bgcolor.'">#</font>';
1281: if ($formula ne '') {
1282: $value = '<i>undefined value</i>';
1283: }
1284: } elsif ($value =~ /^\s*$/ ) {
1285: $value = '<font color="'.$bgcolor.'">#</font>';
1286: } else {
1287: $value = &HTML::Entities::encode($value,'<>&"') if ($value !~/ /);
1288: }
1289: return $value if (! $allowed);
1290: #
1291: # The formula will be parsed by the browser twice before being
1292: # displayed to the user for editing.
1293: #
1294: # The encoding string "^A-blah" is placed in []'s inside a regexp, so
1295: # we specify the characters we want left alone by putting a '^' in front.
1296: $formula = &HTML::Entities::encode($formula,'^A-z0-9 !#$%-;=?~');
1297: # HTML::Entities::encode does not catch everything - we need '\' encoded
1298: $formula =~ s/\\/&\#092/g;
1299: # Escape it again - this time the only encodable character is '&'
1300: $formula =~ s/\&/\&/g;
1301: # Glue everything together
1302: $result .= "<a href=\"javascript:celledit(\'".
1303: $name."','".$formula."');\">".$value."</a>";
1304: return $result;
1305: }
1306:
1307: sub html_uneditable_cell {
1308: my ($cell,$bgcolor) = @_;
1309: my $value = (defined($cell) ? $cell->{'value'} : '');
1310: $value = &HTML::Entities::encode($value,'<>&"') if ($value !~/ /);
1311: return ' '.$value.' ';
1312: }
1313:
1314: sub html_row {
1315: my $self = shift();
1316: my ($num_uneditable,$row,$exportcolor,$importcolor) = @_;
1317: my $allowed = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
1318: my @rowdata = $self->get_row($row);
1319: my $num_cols_output = 0;
1320: my $row_html;
1321: my $color = $importcolor;
1322: if ($row == 0) {
1323: $color = $exportcolor;
1324: }
1325: $color = '#FFDDDD' if (! defined($color));
1326: foreach my $cell (@rowdata) {
1327: if ($num_cols_output++ < $num_uneditable) {
1328: $row_html .= '<td bgcolor="'.$color.'">';
1329: $row_html .= &html_uneditable_cell($cell,'#FFDDDD');
1330: } else {
1331: $row_html .= '<td bgcolor="#EOFFDD">';
1332: $row_html .= &html_editable_cell($cell,'#E0FFDD',$allowed);
1333: }
1334: $row_html .= '</td>';
1335: }
1336: return $row_html;
1337: }
1338:
1339: sub html_header {
1340: my $self = shift;
1341: return '' if (! $env{'request.role.adv'});
1342: return "<table>\n".
1343: '<tr><th align="center">'.&mt('Output Format').'</th></tr>'."\n".
1344: '<tr><td>'.$self->output_selector()."</td></tr>\n".
1345: "</table>\n";
1346: }
1347:
1348: ##
1349: ## Default output types are HTML, Excel, and CSV
1350: sub output_options {
1351: my $self = shift();
1352: return ({value => 'html',
1353: description => 'HTML'},
1354: {value => 'excel',
1355: description => 'Excel'},
1356: # {value => 'xml',
1357: # description => 'XML'},
1358: {value => 'csv',
1359: description => 'Comma Separated Values'},);
1360: }
1361:
1362: sub output_selector {
1363: my $self = shift();
1364: my $output_selector = '<select name="output_format" size="3">'."\n";
1365: my $default = 'html';
1366: if (exists($env{'form.output_format'})) {
1367: $default = $env{'form.output_format'}
1368: } else {
1369: $env{'form.output_format'} = $default;
1370: }
1371: foreach ($self->output_options()) {
1372: $output_selector.='<option value="'.$_->{'value'}.'"';
1373: if ($_->{'value'} eq $default) {
1374: $output_selector .= ' selected';
1375: }
1376: $output_selector .= ">".&mt($_->{'description'})."</option>\n";
1377: }
1378: $output_selector .= "</select>\n";
1379: return $output_selector;
1380: }
1381:
1382: ################################################
1383: ## Excel output routines ##
1384: ################################################
1385: sub excel_output_row {
1386: my $self = shift;
1387: my ($worksheet,$rownum,$rows_output,@prepend) = @_;
1388: my $cols_output = 0;
1389: #
1390: my @rowdata = $self->get_row($rownum);
1391: foreach my $cell (@prepend,@rowdata) {
1392: my $value = $cell;
1393: $value = $cell->{'value'} if (ref($value));
1394: $value =~ s/\ / /gi;
1395: $worksheet->write($rows_output,$cols_output++,$value);
1396: }
1397: return;
1398: }
1399:
1400: #
1401: # This routine is just a stub
1402: sub outsheet_htmlclasslist {
1403: my $self = shift;
1404: my ($r) = @_;
1405: $r->print('<h2>'.&mt("This output is not supported").'</h2>');
1406: $r->rflush();
1407: return;
1408: }
1409:
1410: sub outsheet_excel {
1411: my $self = shift;
1412: my ($r) = @_;
1413: my $connection = $r->connection();
1414: #
1415: $r->print($self->html_report_error());
1416: $r->rflush();
1417: #
1418: $r->print("<h2>".&mt('Preparing Excel Spreadsheet')."</h2>");
1419: #
1420: # Create excel workbook
1421: my ($workbook,$filename,$format)=&Apache::loncommon::create_workbook($r);
1422: return if (! defined($workbook));
1423: #
1424: # Create main worksheet
1425: my $worksheet = $workbook->addworksheet('main');
1426: my $rows_output = 0;
1427: my $cols_output = 0;
1428: #
1429: # Write excel header
1430: foreach my $value ($self->get_title()) {
1431: $cols_output = 0;
1432: $worksheet->write($rows_output++,$cols_output,$value,$format->{'h1'});
1433: }
1434: $rows_output++; # skip a line
1435: #
1436: # Write summary/export row
1437: $cols_output = 0;
1438: $self->excel_output_row($worksheet,0,$rows_output++,'Summary',
1439: $format->{'b'});
1440: $rows_output++; # skip a line
1441: #
1442: $self->excel_rows($connection,$worksheet,$cols_output,$rows_output,
1443: $format);
1444: #
1445: #
1446: # Close the excel file
1447: $workbook->close();
1448: #
1449: # Write a link to allow them to download it
1450: $r->print('<br />'.
1451: '<a href="'.$filename.'">Your Excel spreadsheet.</a>'."\n");
1452: return;
1453: }
1454:
1455: #################################
1456: ## CSV output routines ##
1457: #################################
1458: sub outsheet_csv {
1459: my $self = shift;
1460: my ($r) = @_;
1461: my $connection = $r->connection();
1462: #
1463: $r->print($self->html_report_error());
1464: $r->rflush();
1465: #
1466: my $csvdata = '';
1467: my @Values;
1468: #
1469: # Open the csv file
1470: my $filename = '/prtspool/'.
1471: $env{'user.name'}.'_'.$env{'user.domain'}.'_'.
1472: time.'_'.rand(1000000000).'.csv';
1473: my $file;
1474: unless ($file = Apache::File->new('>'.'/home/httpd'.$filename)) {
1475: $r->log_error("Couldn't open $filename for output $!");
1476: $r->print(&mt("Problems occured in writing the csv file. ".
1477: "This error has been logged. ".
1478: "Please alert your LON-CAPA administrator."));
1479: $r->print("<pre>\n".$csvdata."</pre>\n");
1480: return 0;
1481: }
1482: #
1483: # Output the title information
1484: foreach my $value ($self->get_title()) {
1485: print $file "'".&Apache::loncommon::csv_translate($value)."'\n";
1486: }
1487: #
1488: # Output the body of the spreadsheet
1489: $self->csv_rows($connection,$file);
1490: #
1491: # Close the csv file
1492: close($file);
1493: $r->print('<br /><br />'.
1494: '<a href="'.$filename.'">'.&mt('Your CSV spreadsheet.').'</a>'."\n");
1495: #
1496: return 1;
1497: }
1498:
1499: sub csv_output_row {
1500: my $self = shift;
1501: my ($filehandle,$rownum,@prepend) = @_;
1502: #
1503: my @rowdata = ();
1504: if (defined($rownum)) {
1505: @rowdata = $self->get_row($rownum);
1506: }
1507: my @output = ();
1508: foreach my $cell (@prepend,@rowdata) {
1509: my $value = $cell;
1510: $value = $cell->{'value'} if (ref($value));
1511: $value =~ s/\ / /gi;
1512: $value = "'".$value."'";
1513: push (@output,$value);
1514: }
1515: print $filehandle join(',',@output )."\n";
1516: return;
1517: }
1518:
1519: ############################################
1520: ## XML output routines ##
1521: ############################################
1522: sub outsheet_xml {
1523: my $self = shift;
1524: my ($r) = @_;
1525: ## Someday XML
1526: ## Will be rendered for the user
1527: ## But not on this day
1528: my $Str = '<spreadsheet type="'.$self->{'type'}.'">'."\n";
1529: while (my ($cell,$formula) = each(%{$self->{'formulas'}})) {
1530: if ($cell =~ /^template_(\w+)/) {
1531: my $col = $1;
1532: $Str .= '<template col="'.$col.'">'.$formula.'</template>'."\n";
1533: } else {
1534: my ($col,$row) = ($cell =~ /^([A-z])(\d+)/);
1535: next if (! defined($row) || ! defined($col));
1536: next if ($row != 0);
1537: $Str .=
1538: '<field row="'.$row.'" col="'.$col.'" >'.$formula.'</field>'
1539: ."\n";
1540: }
1541: }
1542: $Str.="</spreadsheet>";
1543: $r->print("<pre>\n\n\n".$Str."\n\n\n</pre>");
1544: return $Str;
1545: }
1546:
1547: ############################################
1548: ### Filesystem routines ###
1549: ############################################
1550: sub parse_sheet {
1551: # $sheetxml is a scalar reference or a scalar
1552: my ($sheetxml) = @_;
1553: if (! ref($sheetxml)) {
1554: my $tmp = $sheetxml;
1555: $sheetxml = \$tmp;
1556: }
1557: my %formulas;
1558: my %sources;
1559: my $parser=HTML::TokeParser->new($sheetxml);
1560: my $token;
1561: while ($token=$parser->get_token) {
1562: if ($token->[0] eq 'S') {
1563: if ($token->[1] eq 'field') {
1564: my $cell = $token->[2]->{'col'}.$token->[2]->{'row'};
1565: my $source = $token->[2]->{'source'};
1566: my $formula = $parser->get_text('/field');
1567: $formulas{$cell} = $formula;
1568: $sources{$cell} = $source if (defined($source));
1569: $parser->get_text('/field');
1570: } elsif ($token->[1] eq 'template') {
1571: $formulas{'template_'.$token->[2]->{'col'}}=
1572: $parser->get_text('/template');
1573: }
1574: }
1575: }
1576: return (\%formulas,\%sources);
1577: }
1578:
1579: {
1580:
1581: my %spreadsheets;
1582:
1583: sub clear_spreadsheet_definition_cache {
1584: undef(%spreadsheets);
1585: }
1586:
1587: sub load_system_default_sheet {
1588: my $self = shift;
1589: my $includedir = $Apache::lonnet::perlvar{'lonIncludes'};
1590: # load in the default defined spreadsheet
1591: my $sheetxml='';
1592: my $fh;
1593: if ($fh=Apache::File->new($includedir.'/default_'.$self->{'type'})) {
1594: $sheetxml=join('',<$fh>);
1595: $fh->close();
1596: } else {
1597: # $sheetxml='<field row="0" col="A">"Error"</field>';
1598: $sheetxml='<field row="0" col="A"></field>';
1599: }
1600: $self->filename('default_');
1601: my ($formulas,undef) = &parse_sheet(\$sheetxml);
1602: return $formulas;
1603: }
1604:
1605: sub load {
1606: my $self = shift;
1607: #
1608: my $stype = $self->{'type'};
1609: my $cnum = $self->{'cnum'};
1610: my $cdom = $self->{'cdom'};
1611: my $chome = $self->{'chome'};
1612: #
1613: my $filename = $self->filename();
1614: my $cachekey = join('_',($cnum,$cdom,$stype,$filename));
1615: #
1616: # see if sheet is cached
1617: my ($formulas);
1618: if (exists($spreadsheets{$cachekey})) {
1619: $formulas = $spreadsheets{$cachekey}->{'formulas'};
1620: } else {
1621: # Not cached, need to read
1622: if (! defined($filename)) {
1623: $formulas = $self->load_system_default_sheet();
1624: } elsif($filename =~ /^\/res\/.*\.spreadsheet$/) {
1625: # Load a spreadsheet definition file
1626: my $sheetxml=&Apache::lonnet::getfile
1627: (&Apache::lonnet::filelocation('',$filename));
1628: if ($sheetxml == -1) {
1629: $sheetxml='<field row="0" col="A">"Error loading spreadsheet '
1630: .$self->filename().'"</field>';
1631: }
1632: ($formulas,undef) = &parse_sheet(\$sheetxml);
1633: # Get just the filename and set the sheets filename
1634: my ($newfilename) = ($filename =~ /\/([^\/]*)\.spreadsheet$/);
1635: if ($self->is_default()) {
1636: $self->filename($newfilename);
1637: $self->make_default();
1638: } else {
1639: $self->filename($newfilename);
1640: }
1641: } else {
1642: # Load the spreadsheet definition file from the save file
1643: my %tmphash = &Apache::lonnet::dump($filename,$cdom,$cnum);
1644: my ($tmp) = keys(%tmphash);
1645: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
1646: while (my ($cell,$formula) = each(%tmphash)) {
1647: $formulas->{$cell}=$formula;
1648: }
1649: } else {
1650: $formulas = $self->load_system_default_sheet();
1651: }
1652: }
1653: $filename=$self->filename(); # filename may have changed
1654: $cachekey = join('_',($cnum,$cdom,$stype,$filename));
1655: %{$spreadsheets{$cachekey}->{'formulas'}} = %{$formulas};
1656: }
1657: $self->formulas($formulas);
1658: $self->set_row_sources();
1659: $self->set_row_numbers();
1660: }
1661:
1662: sub set_row_sources {
1663: my $self = shift;
1664: while (my ($cell,$value) = each(%{$self->{'formulas'}})) {
1665: next if ($cell !~ /^A(\d+)/ || $1 < 1);
1666: my $row = $1;
1667: $self->{'row_source'}->{$row} = $value;
1668: }
1669: return;
1670: }
1671:
1672: sub set_row_numbers {
1673: my $self = shift;
1674: while (my ($cell,$value) = each(%{$self->{'formulas'}})) {
1675: next if ($cell !~ /^A(\d+)$/);
1676: next if (! defined($value));
1677: $self->{'row_numbers'}->{$value} = $1;
1678: $self->{'maxrow'} = $1 if ($1 > $self->{'maxrow'});
1679: }
1680: }
1681:
1682: ##
1683: ## exportrow is *not* used to get the export row from a computed sub-sheet.
1684: ##
1685: sub exportrow {
1686: my $self = shift;
1687: if (exists($self->{'badcalc'}) && $self->{'badcalc'}) {
1688: return ();
1689: }
1690: my @exportarray;
1691: foreach my $column (@UC_Columns) {
1692: push(@exportarray,$self->value($column.'0'));
1693: }
1694: return @exportarray;
1695: }
1696:
1697: sub save {
1698: my $self = shift;
1699: my ($makedef)=@_;
1700: my $cid=$self->{'cid'};
1701: # If we are saving it, it must not be temporary
1702: $self->temporary(0);
1703: if (&Apache::lonnet::allowed('opa',$cid)) {
1704: my %f=$self->formulas();
1705: my $stype = $self->{'type'};
1706: my $cnum = $self->{'cnum'};
1707: my $cdom = $self->{'cdom'};
1708: my $chome = $self->{'chome'};
1709: my $filename = $self->{'filename'};
1710: my $cachekey = join('_',($cnum,$cdom,$stype,$filename));
1711: # Cache new sheet
1712: %{$spreadsheets{$cachekey}->{'formulas'}}=%f;
1713: # Write sheet
1714: foreach (keys(%f)) {
1715: delete($f{$_}) if ($f{$_} eq 'import');
1716: }
1717: my $reply = &Apache::lonnet::put($filename,\%f,$cdom,$cnum);
1718: return $reply if ($reply ne 'ok');
1719: $reply = &Apache::lonnet::put($stype.'_spreadsheets',
1720: {$filename => $env{'user.name'}.'@'.$env{'user.domain'}},
1721: $cdom,$cnum);
1722: return $reply if ($reply ne 'ok');
1723: if ($makedef) {
1724: $reply = &Apache::lonnet::put('environment',
1725: {'spreadsheet_default_'.$stype => $filename },
1726: $cdom,$cnum);
1727: return $reply if ($reply ne 'ok');
1728: }
1729: if ($self->is_default()) {
1730: if ($self->{'type'} eq 'studentcalc') {
1731: &Apache::lonnet::expirespread('','','studentcalc','');
1732: } elsif ($self->{'type'} eq 'assesscalc') {
1733: &Apache::lonnet::expirespread('','','assesscalc','');
1734: &Apache::lonnet::expirespread('','','studentcalc','');
1735: }
1736: }
1737: return $reply;
1738: }
1739: return 'unauthorized';
1740: }
1741:
1742: } # end of scope for %spreadsheets
1743:
1744: sub save_tmp {
1745: my $self = shift;
1746: my $filename=$env{'user.name'}.'_'.
1747: $env{'user.domain'}.'_spreadsheet_'.$self->{'symb'}.'_'.
1748: $self->{'filename'};
1749: $filename=~s/\W/\_/g;
1750: $filename=$Apache::lonnet::tmpdir.$filename.'.tmp';
1751: $self->temporary(1);
1752: my $fh;
1753: if ($fh=Apache::File->new('>'.$filename)) {
1754: my %f = $self->formulas();
1755: while( my ($cell,$formula) = each(%f)) {
1756: next if ($formula eq 'import');
1757: print $fh &Apache::lonnet::escape($cell)."=".
1758: &Apache::lonnet::escape($formula)."\n";
1759: }
1760: $fh->close();
1761: }
1762: }
1763:
1764: sub load_tmp {
1765: my $self = shift;
1766: my $filename=$env{'user.name'}.'_'.
1767: $env{'user.domain'}.'_spreadsheet_'.$self->{'symb'}.'_'.
1768: $self->{'filename'};
1769: $filename=~s/\W/\_/g;
1770: $filename=$Apache::lonnet::tmpdir.$filename.'.tmp';
1771: my %formulas = ();
1772: if (my $spreadsheet_file = Apache::File->new($filename)) {
1773: while (<$spreadsheet_file>) {
1774: chomp;
1775: my ($cell,$formula) = split(/=/);
1776: $cell = &Apache::lonnet::unescape($cell);
1777: $formula = &Apache::lonnet::unescape($formula);
1778: $formulas{$cell} = $formula;
1779: }
1780: $spreadsheet_file->close();
1781: }
1782: # flag the sheet as temporary
1783: $self->temporary(1);
1784: $self->formulas(\%formulas);
1785: $self->set_row_sources();
1786: $self->set_row_numbers();
1787: return;
1788: }
1789:
1790: sub temporary {
1791: my $self=shift;
1792: if (@_) {
1793: ($self->{'temporary'})= @_;
1794: }
1795: return $self->{'temporary'};
1796: }
1797:
1798: sub modify_cell {
1799: # studentcalc overrides this
1800: my $self = shift;
1801: my ($cell,$formula) = @_;
1802: if ($cell =~ /([A-z])\-/) {
1803: $cell = 'template_'.$1;
1804: } elsif ($cell !~ /^([A-z](\d+)|template_[A-z])$/) {
1805: return;
1806: }
1807: $self->set_formula($cell,$formula);
1808: $self->rebuild_stats();
1809: return;
1810: }
1811:
1812: ###########################################
1813: # othersheets: Returns the list of other spreadsheets available
1814: ###########################################
1815: sub othersheets {
1816: my $self = shift();
1817: my ($stype) = @_;
1818: $stype = $self->{'type'} if (! defined($stype) || $stype !~ /calc$/);
1819: #
1820: my @alternatives=();
1821: my %results=&Apache::lonnet::dump($stype.'_spreadsheets',
1822: $self->{'cdom'}, $self->{'cnum'});
1823: my ($tmp) = keys(%results);
1824: if ($tmp =~ /^(con_lost|error|no_such_host)/i ) {
1825: @alternatives = (&mt('Default'));
1826: } else {
1827: @alternatives = (&mt('Default'), sort (keys(%results)));
1828: }
1829: return @alternatives;
1830: }
1831:
1832: sub blackout {
1833: my $self = shift;
1834: $self->{'blackout'} = $_[0] if (@_);
1835: return $self->{'blackout'};
1836: }
1837:
1838: sub get_row {
1839: my $self = shift;
1840: my ($n)=@_;
1841: my @cols=();
1842: foreach my $col (@UC_Columns,@LC_Columns) {
1843: my $cell = $col.$n;
1844: push(@cols,{ name => $cell,
1845: formula => $self->formula($cell),
1846: value => $self->value($cell)});
1847: }
1848: return @cols;
1849: }
1850:
1851: sub get_template_row {
1852: my $self = shift;
1853: my @cols=();
1854: foreach my $col (@UC_Columns,@LC_Columns) {
1855: my $cell = 'template_'.$col;
1856: push(@cols,{ name => $cell,
1857: formula => $self->formula($cell),
1858: value => $self->formula($cell) });
1859: }
1860: return @cols;
1861: }
1862:
1863: sub need_to_save {
1864: my $self = shift;
1865: if ($self->{'new_rows'} && ! $self->temporary()) {
1866: return 1;
1867: }
1868: return 0;
1869: }
1870:
1871: sub get_row_number_from_key {
1872: my $self = shift;
1873: my ($key) = @_;
1874: if (! exists($self->{'row_numbers'}->{$key}) ||
1875: ! defined($self->{'row_numbers'}->{$key})) {
1876: # I used to set $f here to the new value, but the key passed for lookup
1877: # may not be the key we need to save
1878: $self->{'maxrow'}++;
1879: $self->{'row_numbers'}->{$key} = $self->{'maxrow'};
1880: # $self->logthis('added row '.$self->{'row_numbers'}->{$key}.
1881: # ' for '.$key);
1882: $self->{'new_rows'} = 1;
1883: }
1884: return $self->{'row_numbers'}->{$key};
1885: }
1886:
1887: 1;
1888:
1889: __END__
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