1: #
2: # $Id: Spreadsheet.pm,v 1.69 2006/05/30 12:46:26 www 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: use lib '/home/httpd/lib/perl/';
64: use LONCAPA;
65:
66:
67: ##
68: ## Package Variables
69: ##
70: my %expiredates;
71:
72: my @UC_Columns = split(//,'ABCDEFGHIJKLMNOPQRSTUVWXYZ');
73: my @LC_Columns = split(//,'abcdefghijklmnopqrstuvwxyz');
74:
75: ######################################################
76:
77: =pod
78:
79: =item &new
80:
81: Returns a new spreadsheet object.
82:
83: =cut
84:
85: ######################################################
86: sub new {
87: my $this = shift;
88: my $class = ref($this) || $this;
89: my ($stype) = ($class =~ /Apache::(.*)$/);
90: #
91: my ($name,$domain,$filename,$usymb,$section,$groups)=@_;
92: if (defined($usymb) && ref($usymb)) {
93: $usymb = $usymb->symb;
94: }
95: if (! defined($name) || $name eq '') {
96: $name = $env{'user.name'};
97: }
98: if (! defined($domain) || $domain eq '') {
99: $domain = $env{'user.domain'};
100: }
101: if (! defined($section) || $section eq '') {
102: $section = &Apache::lonnet::getsection($domain,$name,
103: $env{'request.course.id'});
104: }
105: if (! defined($groups)) {
106:
107: my @usersgroups = &Apache::lonnet::get_users_groups($domain,$name,
108: $env{'request.course.id'});
109: $groups = \@usersgroups;
110: }
111: #
112: my $self = {
113: name => $name,
114: domain => $domain,
115: section => $section,
116: groups => $groups,
117: type => $stype,
118: symb => $usymb,
119: errorlog => '',
120: maxrow => 0,
121: cid => $env{'request.course.id'},
122: cnum => $env{'course.'.$env{'request.course.id'}.'.num'},
123: cdom => $env{'course.'.$env{'request.course.id'}.'.domain'},
124: coursedesc => $env{'course.'.$env{'request.course.id'}.'.description'},
125: coursefilename => $env{'request.course.fn'},
126: #
127: # Flags
128: temporary => 0, # true if this sheet has been modified but not saved
129: new_rows => 0, # true if this sheet has new rows
130: loaded => 0, # true if the formulas have been loaded
131: #
132: # blackout is used to determine if any data needs to be hidden from the
133: # student.
134: blackout => 0,
135: #
136: # Data storage
137: formulas => {},
138: constants => {},
139: rows => [],
140: row_source => {},
141: othersheets => [],
142: };
143: #
144: bless($self,$class);
145: $self->filename($filename);
146: #
147: return $self;
148: }
149:
150: ######################################################
151:
152: =pod
153:
154: =item &filename
155:
156: get or set the filename for a spreadsheet.
157:
158: =cut
159:
160: ######################################################
161: sub filename {
162: my $self = shift();
163: if (@_) {
164: my ($newfilename) = @_;
165: if (! defined($newfilename) || $newfilename eq 'Default' ||
166: $newfilename !~ /\w/ || $newfilename eq '') {
167: my $key = 'course.'.$self->{'cid'}.'.spreadsheet_default_'.
168: $self->{'type'};
169: if (exists($env{$key}) && $env{$key} ne '') {
170: $newfilename = $env{$key};
171: } else {
172: $newfilename = 'default_'.$self->{'type'};
173: }
174: }
175: if ($newfilename !~ /\w/ || $newfilename =~ /^\W*$/) {
176: $newfilename = 'default_'.$self->{'type'};
177: }
178: if ($newfilename !~ /^default\.$self->{'type'}$/ &&
179: $newfilename !~ /^\/res\/(.*)spreadsheet$/) {
180: if ($newfilename !~ /_$self->{'type'}$/) {
181: $newfilename =~ s/[\s_]*$//;
182: $newfilename .= '_'.$self->{'type'};
183: }
184: }
185: $self->{'filename'} = $newfilename;
186: return;
187: }
188: return $self->{'filename'};
189: }
190:
191: ######################################################
192:
193: =pod
194:
195: =item &make_default()
196:
197: Make the current spreadsheet file the default for the course. Expires all the
198: default spreadsheets.......!
199:
200: =cut
201:
202: ######################################################
203: sub make_default {
204: my $self = shift();
205: my $result = &Apache::lonnet::put('environment',
206: {'spreadsheet_default_'.$self->{'type'} => $self->filename()},
207: $self->{'cdom'},$self->{'cnum'});
208: return $result if ($result ne 'ok');
209: &Apache::lonnet::appenv('course.'.$self->{'cid'}.'.spreadsheet_default_'.
210: $self->{'type'} => $self->filename());
211: my $symb = $self->{'symb'};
212: $symb = '' if (! defined($symb));
213: &Apache::lonnet::expirespread('','',$self->{'type'},$symb);
214: }
215:
216: ######################################################
217:
218: =pod
219:
220: =item &is_default()
221:
222: Returns 1 if the current spreadsheet is the default as specified in the
223: course environment. Returns 0 otherwise.
224:
225: =cut
226:
227: ######################################################
228: sub is_default {
229: my $self = shift;
230: # Check to find out if we are the default spreadsheet (filenames match)
231: my $default_filename = $env{'course.'.$self->{'cid'}.
232: '.spreadsheet_default_'.$self->{'type'}};
233: if ($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: $domain = '';
370: #
371: # course data
372: $csec = '';
373: $cnum = '';
374: $cdom = '';
375: $cid = '';
376: $coursefilename = '';
377: #
378: # symb
379: $usymb = '';
380: #
381: # error messages
382: $errormsg = '';
383: #
384: #-------------------------------------------------------
385:
386: =pod
387:
388: =item EXT(parameter)
389:
390: Calls the system EXT function to determine the value of the given parameter.
391:
392: =cut
393:
394: #-------------------------------------------------------
395: sub EXT {
396: my ($parameter,$specific_symb) = @_;
397: return '' if (! defined($parameter) || $parameter eq '');
398: $parameter =~ s/^parameter\./resource\./;
399: if ($specific_symb eq '') { $specific_symb = $symb; }
400: my $value = &Apache::lonnet::EXT($parameter,$specific_symb,$domain,$name,
401: $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: $num = '([1-9]\d*)';
718: }
719: if (($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/) {
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: $self->{'loaded'} = 1;
983: return;
984: } else {
985: $self->check_formulas_loaded();
986: return %{$self->{'formulas'}};
987: }
988: }
989:
990: sub check_formulas_loaded {
991: my $self=shift;
992: if (!$self->{'loaded'}) {
993: $self->{'loaded'}=1;
994: # Load in the spreadsheet definition
995: if (exists($env{'form.workcopy'}) &&
996: $self->{'type'} eq $env{'form.workcopy'}) {
997: $self->load_tmp();
998: } else {
999: $self->load();
1000: }
1001: }
1002: }
1003:
1004: sub set_formula {
1005: my $self = shift;
1006: my ($cell,$formula) = @_;
1007: $self->check_formulas_loaded();
1008: $self->{'formulas'}->{$cell}=$formula;
1009: return;
1010: }
1011:
1012: ##
1013: ## formulas_keys: Return the keys to the formulas hash.
1014: ##
1015: sub formulas_keys {
1016: my $self = shift;
1017: $self->check_formulas_loaded();
1018: return keys(%{$self->{'formulas'}});
1019: }
1020:
1021: ##
1022: ## formula: Return the formula for a given cell in the spreadsheet
1023: ## returns '' if the cell does not have a formula or does not exist
1024: ##
1025: sub formula {
1026: my $self = shift;
1027: my $cell = shift;
1028: $self->check_formulas_loaded();
1029: if (defined($cell) && exists($self->{'formulas'}->{$cell})) {
1030: return $self->{'formulas'}->{$cell};
1031: }
1032: return '';
1033: }
1034:
1035: ##
1036: ## logthis: write the input to lonnet.log
1037: ##
1038: sub logthis {
1039: my $self = shift;
1040: my $message = shift;
1041: &Apache::lonnet::logthis($self->{'type'}.':'.
1042: $self->{'name'}.':'.$self->{'domain'}.':'.
1043: $message);
1044: return;
1045: }
1046:
1047: ##
1048: ## dump_formulas_to_log: makes lonnet.log huge...
1049: ##
1050: sub dump_formulas_to_log {
1051: my $self =shift;
1052: $self->logthis("Spreadsheet formulas");
1053: $self->logthis("--------------------------------------------------------");
1054: while (my ($cell, $formula) = each(%{$self->{'formulas'}})) {
1055: $self->logthis(' '.$cell.' = '.$formula);
1056: }
1057: $self->logthis("--------------------------------------------------------");}
1058:
1059: ##
1060: ## value: returns the computed value of a particular cell
1061: ##
1062: sub value {
1063: my $self = shift;
1064: my $cell = shift;
1065: if (defined($cell) && exists($self->{'values'}->{$cell})) {
1066: return $self->{'values'}->{$cell};
1067: }
1068: return '';
1069: }
1070:
1071: ##
1072: ## dump_values_to_log: makes lonnet.log huge...
1073: ##
1074: sub dump_values_to_log {
1075: my $self =shift;
1076: $self->logthis("Spreadsheet Values");
1077: $self->logthis("------------------------------------------------------");
1078: while (my ($cell, $value) = each(%{$self->{'values'}})) {
1079: $self->logthis(' '.$cell.' = '.$value);
1080: }
1081: $self->logthis("------------------------------------------------------");
1082: }
1083:
1084: ##
1085: ## Yet another debugging function
1086: ##
1087: sub dump_hash_to_log {
1088: my $self= shift();
1089: my %tmp = @_;
1090: if (@_<2) {
1091: %tmp = %{$_[0]};
1092: }
1093: $self->logthis('---------------------------- (begin hash dump)');
1094: while (my ($key,$val) = each (%tmp)) {
1095: $self->logthis(' '.$key.' = '.$val.':');
1096: }
1097: $self->logthis('---------------------------- (finished hash dump)');
1098: }
1099:
1100: ##
1101: ## rebuild_stats: rebuilds the rows and template_cells arrays
1102: ##
1103: sub rebuild_stats {
1104: my $self = shift;
1105: $self->{'rows'}=[];
1106: $self->{'template_cells'}=[];
1107: $self->check_formulas_loaded();
1108: while (my ($cell,$formula) = each(%{$self->{'formulas'}})) {
1109: push(@{$self->{'rows'}},$1) if ($cell =~ /^A(\d+)/ && $1 != 0);
1110: push(@{$self->{'template_cells'}},$1) if ($cell =~ /^template_(\w+)/);
1111: }
1112: return;
1113: }
1114:
1115: ##
1116: ## template_cells returns a list of the cells defined in the template row
1117: ##
1118: sub template_cells {
1119: my $self = shift;
1120: $self->rebuild_stats() if (! defined($self->{'template_cells'}) ||
1121: ! @{$self->{'template_cells'}});
1122: return @{$self->{'template_cells'}};
1123: }
1124:
1125: ##
1126: ## Sigh....
1127: ##
1128: sub setothersheets {
1129: my $self = shift;
1130: my @othersheets = @_;
1131: $self->{'othersheets'} = \@othersheets;
1132: }
1133:
1134: ##
1135: ## rows returns a list of the names of cells defined in the A column
1136: ##
1137: sub rows {
1138: my $self = shift;
1139: $self->rebuild_stats() if (!@{$self->{'rows'}});
1140: return @{$self->{'rows'}};
1141: }
1142:
1143: #
1144: # calcsheet: makes all the calls to compute the spreadsheet.
1145: #
1146: sub calcsheet {
1147: my $self = shift;
1148: $self->sync_safe_space();
1149: $self->clear_errorlog();
1150: $self->sett();
1151: my $result = $self->{'safe'}->reval('&calc();');
1152: # $self->logthis($self->get_errorlog());
1153: %{$self->{'values'}} = %{$self->{'safe'}->varglob('sheet_values')};
1154: # $self->logthis($self->get_errorlog());
1155: if ($result ne 'okay') {
1156: $self->set_calcerror($result);
1157: }
1158: return $result;
1159: }
1160:
1161: sub set_badcalc {
1162: my $self = shift();
1163: $self->{'badcalc'} =1;
1164: return;
1165: }
1166:
1167: sub badcalc {
1168: my $self = shift;
1169: if (exists($self->{'badcalc'}) && $self->{'badcalc'}) {
1170: return 1;
1171: } else {
1172: return 0;
1173: }
1174: }
1175:
1176: sub set_calcerror {
1177: my $self = shift;
1178: if (@_) {
1179: $self->set_badcalc();
1180: if (exists($self->{'calcerror'})) {
1181: $self->{'calcerror'}.="\n".$_[0];
1182: } else {
1183: $self->{'calcerror'}.=$_[0];
1184: }
1185: }
1186: }
1187:
1188: sub calcerror {
1189: my $self = shift;
1190: if ($self->badcalc()) {
1191: if (exists($self->{'calcerror'})) {
1192: return $self->{'calcerror'};
1193: }
1194: }
1195: return;
1196: }
1197:
1198: ###########################################################
1199: ##
1200: ## Output Helpers
1201: ##
1202: ###########################################################
1203: sub display {
1204: my $self = shift;
1205: my ($r) = @_;
1206: my $outputmode = 'html';
1207: foreach ($self->output_options()) {
1208: if ($env{'form.output_format'} eq $_->{'value'}) {
1209: $outputmode = $_->{'value'};
1210: last;
1211: }
1212: }
1213: $self->{outputmode} = $outputmode;
1214: if ($outputmode eq 'html') {
1215: $self->compute($r);
1216: $self->outsheet_html($r);
1217: } elsif ($outputmode eq 'htmlclasslist') {
1218: # No computation neccessary... This is kludgy
1219: $self->outsheet_htmlclasslist($r);
1220: } elsif ($outputmode eq 'source') {
1221: # No computation necessary. Rumor has it that this is some
1222: # sort of kludge w.r.t. not "computing". It's also
1223: # a bit of of a kludge that we call "outsheet_html" and
1224: # let the 'outputmode' cause the outputting of source.
1225: $self->outsheet_html($r);
1226: } elsif ($outputmode eq 'excel') {
1227: $self->compute($r);
1228: $self->outsheet_excel($r);
1229: } elsif ($outputmode eq 'csv') {
1230: $self->compute($r);
1231: $self->outsheet_csv($r);
1232: } elsif ($outputmode eq 'xml') {
1233: # $self->compute($r);
1234: $self->outsheet_xml($r);
1235: }
1236: $self->cleanup();
1237: return;
1238: }
1239:
1240: ############################################
1241: ## HTML output routines ##
1242: ############################################
1243: sub html_report_error {
1244: my $self = shift();
1245: my $Str = '';
1246: if ($self->badcalc()) {
1247: $Str = '<h3 style="color:red">'.
1248: &mt('An error occurred while calculating this spreadsheet').
1249: "</h3>\n".
1250: '<pre>'.$self->calcerror()."</pre>\n";
1251: }
1252: return $Str;
1253: }
1254:
1255: sub html_export_row {
1256: my $self = shift();
1257: my ($color) = @_;
1258: $color = '#CCCCFF' if (! defined($color));
1259: my $allowed = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
1260: my $row_html;
1261: my @rowdata = $self->get_row(0);
1262: foreach my $cell (@rowdata) {
1263: if ($cell->{'name'} =~ /^[A-Z]/) {
1264: $row_html .= '<td bgcolor="'.$color.'">'.
1265: &html_editable_cell($cell,$color,$allowed,
1266: $self->{outputmode} eq 'source').'</td>';
1267: } else {
1268: $row_html .= '<td bgcolor="#DDCCFF">'.
1269: &html_editable_cell($cell,'#DDCCFF',$allowed,
1270: $self->{outputmode} eq 'source').'</td>';
1271: }
1272: }
1273: return $row_html;
1274: }
1275:
1276: sub html_template_row {
1277: my $self = shift();
1278: my $allowed = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
1279: my ($num_uneditable,$importcolor) = @_;
1280: my $row_html;
1281: my @rowdata = $self->get_template_row();
1282: my $count = 0;
1283: for (my $i = 0; $i<=$#rowdata; $i++) {
1284: my $cell = $rowdata[$i];
1285: if ($i < $num_uneditable) {
1286: $row_html .= '<td bgcolor="'.$importcolor.'">'.
1287: &html_uneditable_cell($cell,'#FFDDDD',$allowed).'</td>';
1288: } else {
1289: $row_html .= '<td bgcolor="#EOFFDD">'.
1290: &html_editable_cell($cell,'#EOFFDD',$allowed,
1291: $self->{outputmode} eq 'source').'</td>';
1292: }
1293: }
1294: return $row_html;
1295: }
1296:
1297: sub html_editable_cell {
1298: my ($cell,$bgcolor,$allowed,$showsource) = @_;
1299: my $result;
1300: my ($name,$formula,$value);
1301: if (defined($cell)) {
1302: $name = $cell->{'name'};
1303: $formula = $cell->{'formula'};
1304: $value = $cell->{'value'};
1305: }
1306: $name = '' if (! defined($name));
1307: $formula = '' if (! defined($formula));
1308: if ($showsource) {
1309: if (!defined($formula) || $formula =~ /^\s*$/) {
1310: $value = '<font color="'.$bgcolor.'">#</font>';
1311: } else {
1312: $value = &HTML::Entities::encode($formula, '<>&"');
1313: }
1314: } elsif (! defined($value)) {
1315: $value = '<font color="'.$bgcolor.'">#</font>';
1316: if ($formula ne '') {
1317: $value = '<i>undefined value</i>';
1318: }
1319: } elsif ($value =~ /^\s*$/ ) {
1320: $value = '<font color="'.$bgcolor.'">#</font>';
1321: } else {
1322: $value = &HTML::Entities::encode($value,'<>&"') if ($value !~/ /);
1323: }
1324: return $value if (! $allowed);
1325: #
1326: # The formula will be parsed by the browser twice before being
1327: # displayed to the user for editing.
1328: #
1329: # The encoding string "^A-blah" is placed in []'s inside a regexp, so
1330: # we specify the characters we want left alone by putting a '^' in front.
1331: $formula = &HTML::Entities::encode($formula,'^A-z0-9 !#$%-;=?~');
1332: # HTML::Entities::encode does not catch everything - we need '\' encoded
1333: $formula =~ s/\\/&\#092/g;
1334: # Escape it again - this time the only encodable character is '&'
1335: $formula =~ s/\&/\&/g;
1336: # Glue everything together
1337: $result .= "<a href=\"javascript:celledit(\'".
1338: $name."','".$formula."');\">".$value."</a>";
1339: return $result;
1340: }
1341:
1342: sub html_uneditable_cell {
1343: my ($cell,$bgcolor) = @_;
1344: my $value = (defined($cell) ? $cell->{'value'} : '');
1345: $value = &HTML::Entities::encode($value,'<>&"') if ($value !~/ /);
1346: return ' '.$value.' ';
1347: }
1348:
1349: sub html_row {
1350: my $self = shift();
1351: my ($num_uneditable,$row,$exportcolor,$importcolor) = @_;
1352: my $allowed = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
1353: my @rowdata = $self->get_row($row);
1354: my $num_cols_output = 0;
1355: my $row_html;
1356: my $color = $importcolor;
1357: if ($row == 0) {
1358: $color = $exportcolor;
1359: }
1360: $color = '#FFDDDD' if (! defined($color));
1361: foreach my $cell (@rowdata) {
1362: if ($num_cols_output++ < $num_uneditable) {
1363: $row_html .= '<td bgcolor="'.$color.'">';
1364: $row_html .= &html_uneditable_cell($cell,'#FFDDDD');
1365: } else {
1366: $row_html .= '<td bgcolor="#EOFFDD">';
1367: $row_html .= &html_editable_cell($cell,'#E0FFDD',$allowed,
1368: $self->{outputmode} eq 'source');
1369: }
1370: $row_html .= '</td>';
1371: }
1372: return $row_html;
1373: }
1374:
1375: sub html_header {
1376: my $self = shift;
1377: return '' if (! $env{'request.role.adv'});
1378: return "<table>\n".
1379: '<tr><th align="center">'.&mt('Output Format').'</th></tr>'."\n".
1380: '<tr><td>'.$self->output_selector()."</td></tr>\n".
1381: "</table>\n";
1382: }
1383:
1384: ##
1385: ## Default output types are HTML, Excel, and CSV
1386: sub output_options {
1387: my $self = shift();
1388: return ({value => 'html',
1389: description => 'HTML'},
1390: {value => 'excel',
1391: description => 'Excel'},
1392: {value => 'source',
1393: description => 'Show Source'},
1394: # {value => 'xml',
1395: # description => 'XML'},
1396: {value => 'csv',
1397: description => 'Comma Separated Values'},);
1398: }
1399:
1400: sub output_selector {
1401: my $self = shift();
1402: my $output_selector = '<select name="output_format" size="3">'."\n";
1403: my $default = 'html';
1404: if (exists($env{'form.output_format'})) {
1405: $default = $env{'form.output_format'}
1406: } else {
1407: $env{'form.output_format'} = $default;
1408: }
1409: foreach ($self->output_options()) {
1410: $output_selector.='<option value="'.$_->{'value'}.'"';
1411: if ($_->{'value'} eq $default) {
1412: $output_selector .= ' selected';
1413: }
1414: $output_selector .= ">".&mt($_->{'description'})."</option>\n";
1415: }
1416: $output_selector .= "</select>\n";
1417: return $output_selector;
1418: }
1419:
1420: ################################################
1421: ## Excel output routines ##
1422: ################################################
1423: sub excel_output_row {
1424: my $self = shift;
1425: my ($worksheet,$rownum,$rows_output,@prepend) = @_;
1426: my $cols_output = 0;
1427: #
1428: my @rowdata = $self->get_row($rownum);
1429: foreach my $cell (@prepend,@rowdata) {
1430: my $value = $cell;
1431: $value = $cell->{'value'} if (ref($value));
1432: $value =~ s/\ / /gi;
1433: $worksheet->write($rows_output,$cols_output++,$value);
1434: }
1435: return;
1436: }
1437:
1438: #
1439: # This routine is just a stub
1440: sub outsheet_htmlclasslist {
1441: my $self = shift;
1442: my ($r) = @_;
1443: $r->print('<h2>'.&mt("This output is not supported").'</h2>');
1444: $r->rflush();
1445: return;
1446: }
1447:
1448: sub outsheet_excel {
1449: my $self = shift;
1450: my ($r) = @_;
1451: my $connection = $r->connection();
1452: #
1453: $r->print($self->html_report_error());
1454: $r->rflush();
1455: #
1456: $r->print("<h2>".&mt('Preparing Excel Spreadsheet')."</h2>");
1457: #
1458: # Create excel workbook
1459: my ($workbook,$filename,$format)=&Apache::loncommon::create_workbook($r);
1460: return if (! defined($workbook));
1461: #
1462: # Create main worksheet
1463: my $worksheet = $workbook->addworksheet('main');
1464: my $rows_output = 0;
1465: my $cols_output = 0;
1466: #
1467: # Write excel header
1468: foreach my $value ($self->get_title()) {
1469: $cols_output = 0;
1470: $worksheet->write($rows_output++,$cols_output,$value,$format->{'h1'});
1471: }
1472: $rows_output++; # skip a line
1473: #
1474: # Write summary/export row
1475: $cols_output = 0;
1476: $self->excel_output_row($worksheet,0,$rows_output++,'Summary',
1477: $format->{'b'});
1478: $rows_output++; # skip a line
1479: #
1480: $self->excel_rows($connection,$worksheet,$cols_output,$rows_output,
1481: $format);
1482: #
1483: #
1484: # Close the excel file
1485: $workbook->close();
1486: #
1487: # Write a link to allow them to download it
1488: $r->print('<br />'.
1489: '<a href="'.$filename.'">Your Excel spreadsheet.</a>'."\n");
1490: return;
1491: }
1492:
1493: #################################
1494: ## CSV output routines ##
1495: #################################
1496: sub outsheet_csv {
1497: my $self = shift;
1498: my ($r) = @_;
1499: my $connection = $r->connection();
1500: #
1501: $r->print($self->html_report_error());
1502: $r->rflush();
1503: #
1504: my $csvdata = '';
1505: my @Values;
1506: #
1507: # Open the csv file
1508: my $filename = '/prtspool/'.
1509: $env{'user.name'}.'_'.$env{'user.domain'}.'_'.
1510: time.'_'.rand(1000000000).'.csv';
1511: my $file;
1512: unless ($file = Apache::File->new('>'.'/home/httpd'.$filename)) {
1513: $r->log_error("Couldn't open $filename for output $!");
1514: $r->print(&mt("Problems occured in writing the csv file. ".
1515: "This error has been logged. ".
1516: "Please alert your LON-CAPA administrator."));
1517: $r->print("<pre>\n".$csvdata."</pre>\n");
1518: return 0;
1519: }
1520: #
1521: # Output the title information
1522: foreach my $value ($self->get_title()) {
1523: print $file "'".&Apache::loncommon::csv_translate($value)."'\n";
1524: }
1525: #
1526: # Output the body of the spreadsheet
1527: $self->csv_rows($connection,$file);
1528: #
1529: # Close the csv file
1530: close($file);
1531: $r->print('<br /><br />'.
1532: '<a href="'.$filename.'">'.&mt('Your CSV spreadsheet.').'</a>'."\n");
1533: #
1534: return 1;
1535: }
1536:
1537: sub csv_output_row {
1538: my $self = shift;
1539: my ($filehandle,$rownum,@prepend) = @_;
1540: #
1541: my @rowdata = ();
1542: if (defined($rownum)) {
1543: @rowdata = $self->get_row($rownum);
1544: }
1545: my @output = ();
1546: foreach my $cell (@prepend,@rowdata) {
1547: my $value = $cell;
1548: $value = $cell->{'value'} if (ref($value));
1549: $value =~ s/\ / /gi;
1550: $value = "'".$value."'";
1551: push (@output,$value);
1552: }
1553: print $filehandle join(',',@output )."\n";
1554: return;
1555: }
1556:
1557: ############################################
1558: ## XML output routines ##
1559: ############################################
1560: sub outsheet_xml {
1561: my $self = shift;
1562: my ($r) = @_;
1563: ## Someday XML
1564: ## Will be rendered for the user
1565: ## But not on this day
1566: my $Str = '<spreadsheet type="'.$self->{'type'}.'">'."\n";
1567: $self->check_formulas_loaded();
1568: while (my ($cell,$formula) = each(%{$self->{'formulas'}})) {
1569: if ($cell =~ /^template_(\w+)/) {
1570: my $col = $1;
1571: $Str .= '<template col="'.$col.'">'.$formula.'</template>'."\n";
1572: } else {
1573: my ($col,$row) = ($cell =~ /^([A-z])(\d+)/);
1574: next if (! defined($row) || ! defined($col));
1575: next if ($row != 0);
1576: $Str .=
1577: '<field row="'.$row.'" col="'.$col.'" >'.$formula.'</field>'
1578: ."\n";
1579: }
1580: }
1581: $Str.="</spreadsheet>";
1582: $r->print("<pre>\n\n\n".$Str."\n\n\n</pre>");
1583: return $Str;
1584: }
1585:
1586: ############################################
1587: ### Filesystem routines ###
1588: ############################################
1589: sub parse_sheet {
1590: # $sheetxml is a scalar reference or a scalar
1591: my ($sheetxml) = @_;
1592: if (! ref($sheetxml)) {
1593: my $tmp = $sheetxml;
1594: $sheetxml = \$tmp;
1595: }
1596: my %formulas;
1597: my %sources;
1598: my $parser=HTML::TokeParser->new($sheetxml);
1599: my $token;
1600: while ($token=$parser->get_token) {
1601: if ($token->[0] eq 'S') {
1602: if ($token->[1] eq 'field') {
1603: my $cell = $token->[2]->{'col'}.$token->[2]->{'row'};
1604: my $source = $token->[2]->{'source'};
1605: my $formula = $parser->get_text('/field');
1606: $formulas{$cell} = $formula;
1607: $sources{$cell} = $source if (defined($source));
1608: $parser->get_text('/field');
1609: } elsif ($token->[1] eq 'template') {
1610: $formulas{'template_'.$token->[2]->{'col'}}=
1611: $parser->get_text('/template');
1612: }
1613: }
1614: }
1615: return (\%formulas,\%sources);
1616: }
1617:
1618: {
1619:
1620: my %spreadsheets;
1621:
1622: sub clear_spreadsheet_definition_cache {
1623: undef(%spreadsheets);
1624: }
1625:
1626: sub load_system_default_sheet {
1627: my $self = shift;
1628: my $includedir = $Apache::lonnet::perlvar{'lonIncludes'};
1629: # load in the default defined spreadsheet
1630: my $sheetxml='';
1631: my $fh;
1632: if ($fh=Apache::File->new($includedir.'/default_'.$self->{'type'})) {
1633: $sheetxml=join('',<$fh>);
1634: $fh->close();
1635: } else {
1636: # $sheetxml='<field row="0" col="A">"Error"</field>';
1637: $sheetxml='<field row="0" col="A"></field>';
1638: }
1639: $self->filename('default_');
1640: my ($formulas,undef) = &parse_sheet(\$sheetxml);
1641: return $formulas;
1642: }
1643:
1644: sub load {
1645: my $self = shift;
1646: #
1647: my $stype = $self->{'type'};
1648: my $cnum = $self->{'cnum'};
1649: my $cdom = $self->{'cdom'};
1650: #
1651: my $filename = $self->filename();
1652: my $cachekey = join('_',($cnum,$cdom,$stype,$filename));
1653: #
1654: # see if sheet is cached
1655: my ($formulas);
1656: if (exists($spreadsheets{$cachekey})) {
1657: $formulas = $spreadsheets{$cachekey}->{'formulas'};
1658: $self->formulas($formulas);
1659: $self->{'row_source'}=$spreadsheets{$cachekey}->{'row_source'};
1660: $self->{'row_numbers'}=$spreadsheets{$cachekey}->{'row_numbers'};
1661: $self->{'maxrow'}=$spreadsheets{$cachekey}->{'maxrow'};
1662: } else {
1663: # Not cached, need to read
1664: if (! defined($filename)) {
1665: $formulas = $self->load_system_default_sheet();
1666: } elsif($filename =~ /^\/res\/.*\.spreadsheet$/) {
1667: # Load a spreadsheet definition file
1668: my $sheetxml=&Apache::lonnet::getfile
1669: (&Apache::lonnet::filelocation('',$filename));
1670: if ($sheetxml == -1) {
1671: $sheetxml='<field row="0" col="A">"Error loading spreadsheet '
1672: .$self->filename().'"</field>';
1673: }
1674: ($formulas,undef) = &parse_sheet(\$sheetxml);
1675: # Get just the filename and set the sheets filename
1676: my ($newfilename) = ($filename =~ /\/([^\/]*)\.spreadsheet$/);
1677: if ($self->is_default()) {
1678: $self->filename($newfilename);
1679: $self->make_default();
1680: } else {
1681: $self->filename($newfilename);
1682: }
1683: } else {
1684: # Load the spreadsheet definition file from the save file
1685: my %tmphash = &Apache::lonnet::dump($filename,$cdom,$cnum);
1686: my ($tmp) = keys(%tmphash);
1687: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
1688: while (my ($cell,$formula) = each(%tmphash)) {
1689: $formulas->{$cell}=$formula;
1690: }
1691: } else {
1692: $formulas = $self->load_system_default_sheet();
1693: }
1694: }
1695: $self->formulas($formulas);
1696: $self->set_row_sources();
1697: $self->set_row_numbers();
1698: $self->cache_sheet($formulas);
1699: }
1700: }
1701:
1702: sub cache_sheet {
1703: my $self = shift;
1704: my ($formulas) = @_;
1705: my $stype = $self->{'type'};
1706: my $cnum = $self->{'cnum'};
1707: my $cdom = $self->{'cdom'};
1708: #
1709: my $filename = $self->filename();
1710: my $cachekey = join('_',($cnum,$cdom,$stype,$filename));
1711:
1712: if (ref($formulas) eq 'HASH') {
1713: %{$spreadsheets{$cachekey}->{'formulas'}} = %{$formulas};
1714: }
1715: if (ref($self->{'row_source'})) {
1716: %{$spreadsheets{$cachekey}->{'row_source'}} =%{$self->{'row_source'}};
1717: }
1718: if (ref($self->{'row_numbers'})) {
1719: %{$spreadsheets{$cachekey}->{'row_numbers'}}=%{$self->{'row_numbers'}};
1720: }
1721: $spreadsheets{$cachekey}->{'maxrow'} = $self->{'maxrow'};
1722: }
1723:
1724: sub set_row_sources {
1725: my $self = shift;
1726: $self->check_formulas_loaded();
1727: while (my ($cell,$value) = each(%{$self->{'formulas'}})) {
1728: next if ($cell !~ /^A(\d+)/ || $1 < 1);
1729: my $row = $1;
1730: $self->{'row_source'}->{$row} = $value;
1731: }
1732: return;
1733: }
1734:
1735: sub set_row_numbers {
1736: my $self = shift;
1737: $self->check_formulas_loaded();
1738: while (my ($cell,$value) = each(%{$self->{'formulas'}})) {
1739: next if ($cell !~ /^A(\d+)$/);
1740: next if (! defined($value));
1741: $self->{'row_numbers'}->{$value} = $1;
1742: $self->{'maxrow'} = $1 if ($1 > $self->{'maxrow'});
1743: }
1744: }
1745:
1746: ##
1747: ## exportrow is *not* used to get the export row from a computed sub-sheet.
1748: ##
1749: sub exportrow {
1750: my $self = shift;
1751: if (exists($self->{'badcalc'}) && $self->{'badcalc'}) {
1752: return ();
1753: }
1754: my @exportarray;
1755: foreach my $column (@UC_Columns) {
1756: push(@exportarray,$self->value($column.'0'));
1757: }
1758: return @exportarray;
1759: }
1760:
1761: sub save {
1762: my $self = shift;
1763: my ($makedef)=@_;
1764: my $cid=$self->{'cid'};
1765: # If we are saving it, it must not be temporary
1766: $self->temporary(0);
1767: if (&Apache::lonnet::allowed('opa',$cid)) {
1768: my %f=$self->formulas();
1769: my $stype = $self->{'type'};
1770: my $cnum = $self->{'cnum'};
1771: my $cdom = $self->{'cdom'};
1772: my $filename = $self->{'filename'};
1773: # Cache new sheet
1774: $self->cache_sheet(\%f);
1775: # Write sheet
1776: foreach (keys(%f)) {
1777: delete($f{$_}) if ($f{$_} eq 'import');
1778: }
1779: my $reply = &Apache::lonnet::put($filename,\%f,$cdom,$cnum);
1780: return $reply if ($reply ne 'ok');
1781: $reply = &Apache::lonnet::put($stype.'_spreadsheets',
1782: {$filename => $env{'user.name'}.'@'.$env{'user.domain'}},
1783: $cdom,$cnum);
1784: return $reply if ($reply ne 'ok');
1785: if ($makedef) {
1786: $reply = &Apache::lonnet::put('environment',
1787: {'spreadsheet_default_'.$stype => $filename },
1788: $cdom,$cnum);
1789: return $reply if ($reply ne 'ok');
1790: &Apache::lonnet::appenv('course.'.$self->{'cid'}.'.spreadsheet_default_'.
1791: $self->{'type'} => $self->filename());
1792: }
1793: if ($self->is_default()) {
1794: if ($self->{'type'} eq 'studentcalc') {
1795: &Apache::lonnet::expirespread('','','studentcalc','');
1796: } elsif ($self->{'type'} eq 'assesscalc') {
1797: &Apache::lonnet::expirespread('','','assesscalc','');
1798: &Apache::lonnet::expirespread('','','studentcalc','');
1799: }
1800: }
1801: return $reply;
1802: }
1803: return 'unauthorized';
1804: }
1805:
1806: } # end of scope for %spreadsheets
1807:
1808: sub save_tmp {
1809: my $self = shift;
1810: my $filename=$env{'user.name'}.'_'.
1811: $env{'user.domain'}.'_spreadsheet_'.$self->{'symb'}.'_'.
1812: $self->{'filename'};
1813: $filename=~s/\W/\_/g;
1814: $filename=$Apache::lonnet::tmpdir.$filename.'.tmp';
1815: $self->temporary(1);
1816: my $fh;
1817: if ($fh=Apache::File->new('>'.$filename)) {
1818: my %f = $self->formulas();
1819: while( my ($cell,$formula) = each(%f)) {
1820: next if ($formula eq 'import');
1821: print $fh &escape($cell)."=".
1822: &escape($formula)."\n";
1823: }
1824: $fh->close();
1825: }
1826: }
1827:
1828: sub load_tmp {
1829: my $self = shift;
1830: my $filename=$env{'user.name'}.'_'.
1831: $env{'user.domain'}.'_spreadsheet_'.$self->{'symb'}.'_'.
1832: $self->{'filename'};
1833: $filename=~s/\W/\_/g;
1834: $filename=$Apache::lonnet::tmpdir.$filename.'.tmp';
1835: my %formulas = ();
1836: if (my $spreadsheet_file = Apache::File->new($filename)) {
1837: while (<$spreadsheet_file>) {
1838: chomp;
1839: my ($cell,$formula) = split(/=/);
1840: $cell = &unescape($cell);
1841: $formula = &unescape($formula);
1842: $formulas{$cell} = $formula;
1843: }
1844: $spreadsheet_file->close();
1845: }
1846: # flag the sheet as temporary
1847: $self->temporary(1);
1848: $self->formulas(\%formulas);
1849: $self->set_row_sources();
1850: $self->set_row_numbers();
1851: return;
1852: }
1853:
1854: sub temporary {
1855: my $self=shift;
1856: if (@_) {
1857: ($self->{'temporary'})= @_;
1858: }
1859: return $self->{'temporary'};
1860: }
1861:
1862: sub modify_cell {
1863: # studentcalc overrides this
1864: my $self = shift;
1865: my ($cell,$formula) = @_;
1866: if ($cell =~ /([A-z])\-/) {
1867: $cell = 'template_'.$1;
1868: } elsif ($cell !~ /^([A-z](\d+)|template_[A-z])$/) {
1869: return;
1870: }
1871: $self->set_formula($cell,$formula);
1872: $self->rebuild_stats();
1873: return;
1874: }
1875:
1876: ###########################################
1877: # othersheets: Returns the list of other spreadsheets available
1878: ###########################################
1879: sub othersheets {
1880: my $self = shift();
1881: my ($stype) = @_;
1882: $stype = $self->{'type'} if (! defined($stype) || $stype !~ /calc$/);
1883: #
1884: my @alternatives=();
1885: my %results=&Apache::lonnet::dump($stype.'_spreadsheets',
1886: $self->{'cdom'}, $self->{'cnum'});
1887: my ($tmp) = keys(%results);
1888: if ($tmp =~ /^(con_lost|error|no_such_host)/i ) {
1889: @alternatives = (&mt('Default'));
1890: } else {
1891: @alternatives = (&mt('Default'), sort (keys(%results)));
1892: }
1893: return @alternatives;
1894: }
1895:
1896: sub blackout {
1897: my $self = shift;
1898: $self->{'blackout'} = $_[0] if (@_);
1899: return $self->{'blackout'};
1900: }
1901:
1902: sub get_row {
1903: my $self = shift;
1904: my ($n)=@_;
1905: my @cols=();
1906: foreach my $col (@UC_Columns,@LC_Columns) {
1907: my $cell = $col.$n;
1908: push(@cols,{ name => $cell,
1909: formula => $self->formula($cell),
1910: value => $self->value($cell)});
1911: }
1912: return @cols;
1913: }
1914:
1915: sub get_template_row {
1916: my $self = shift;
1917: my @cols=();
1918: foreach my $col (@UC_Columns,@LC_Columns) {
1919: my $cell = 'template_'.$col;
1920: push(@cols,{ name => $cell,
1921: formula => $self->formula($cell),
1922: value => $self->formula($cell) });
1923: }
1924: return @cols;
1925: }
1926:
1927: sub need_to_save {
1928: my $self = shift;
1929: if ($self->{'new_rows'} && ! $self->temporary()) {
1930: return 1;
1931: }
1932: return 0;
1933: }
1934:
1935: sub get_row_number_from_key {
1936: my $self = shift;
1937: my ($key) = @_;
1938: if (! exists($self->{'row_numbers'}->{$key}) ||
1939: ! defined($self->{'row_numbers'}->{$key})) {
1940: # I used to set $f here to the new value, but the key passed for lookup
1941: # may not be the key we need to save
1942: $self->{'maxrow'}++;
1943: $self->{'row_numbers'}->{$key} = $self->{'maxrow'};
1944: # $self->logthis('added row '.$self->{'row_numbers'}->{$key}.
1945: # ' for '.$key);
1946: $self->{'new_rows'} = 1;
1947: }
1948: return $self->{'row_numbers'}->{$key};
1949: }
1950:
1951: 1;
1952:
1953: __END__
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