1: #
2: # $Id: Spreadsheet.pm,v 1.45 2005/05/13 15:59:07 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: my $code=<<'ENDDEFS';
334: # ---------------------------------------------------- Inside of the safe space
335: #
336: # f: formulas
337: # t: intermediate format (variable references expanded)
338: # v: output values
339: # c: preloaded constants (A-column)
340: # rl: row label
341: # os: other spreadsheets (for student spreadsheet only)
342: undef %sheet_values; # Holds the (computed, final) values for the sheet
343: # This is only written to by &calc, the spreadsheet computation routine.
344: # It is read by many functions
345: undef %t; # Holds the values of the spreadsheet temporarily. Set in &sett,
346: # which does the translation of strings like C5 into the value in C5.
347: # Used in &calc - %t holds the values that are actually eval'd.
348: undef %f; # Holds the formulas for each cell. This is the users
349: # (spreadsheet authors) data for each cell.
350: undef %c; # Holds the constants for a sheet. In the assessment
351: # sheets, this is the A column. Used in &MINPARM, &MAXPARM, &expandnamed,
352: # &sett, and &constants. There is no &getconstants.
353: # &constants is called by &loadstudent, &loadcourse, &load assessment,
354: undef @os; # Holds the names of other spreadsheets - this is used to specify
355: # the spreadsheets that are available for the assessment sheet.
356: # Set by &setothersheets. &setothersheets is called by &handler. A
357: # related subroutine is &othersheets.
358: $errorlog = '';
359: #
360: $maxrow = 0;
361: $type = '';
362: #
363: # filename/reference of the sheet
364: $filename = '';
365: #
366: # user data
367: $name = '';
368: $uhome = '';
369: $domain = '';
370: #
371: # course data
372: $csec = '';
373: $chome= '';
374: $cnum = '';
375: $cdom = '';
376: $cid = '';
377: $coursefilename = '';
378: #
379: # symb
380: $usymb = '';
381: #
382: # error messages
383: $errormsg = '';
384: #
385: #-------------------------------------------------------
386:
387: =pod
388:
389: =item EXT(parameter)
390:
391: Calls the system EXT function to determine the value of the given parameter.
392:
393: =cut
394:
395: #-------------------------------------------------------
396: sub EXT {
397: my ($parameter) = @_;
398: return '' if (! defined($parameter) || $parameter eq '');
399: $parameter =~ s/^parameter\./resource\./;
400: my $value = &Apache::lonnet::EXT($parameter,$symb,$domain,$name,$usection);
401: return $value;
402: }
403:
404: #-------------------------------------------------------
405:
406: =pod
407:
408: =item NUM(range)
409:
410: returns the number of items in the range.
411:
412: =cut
413:
414: #-------------------------------------------------------
415: sub NUM {
416: my $values=&get_values(@_);
417: my $num= scalar(@$values);
418: return $num;
419: }
420:
421: #-------------------------------------------------------
422:
423: =pod
424:
425: =item BIN(low,high,lower,upper)
426:
427: =cut
428:
429: #-------------------------------------------------------
430: sub BIN {
431: my ($low,$high,$lower,$upper)=@_;
432: my $values=&get_values($lower,$upper);
433: my $num=0;
434: foreach (@$values) {
435: if (($_>=$low) && ($_<=$high)) {
436: $num++;
437: }
438: }
439: return $num;
440: }
441:
442: #-------------------------------------------------------
443:
444: =pod
445:
446: =item SUM(range)
447:
448: returns the sum of items in the range.
449:
450: =cut
451:
452: #-------------------------------------------------------
453: sub SUM {
454: my $values=&get_values(@_);
455: my $sum=0;
456: foreach (@$values) {
457: $sum+=$_;
458: }
459: return $sum;
460: }
461:
462: #-------------------------------------------------------
463:
464: =pod
465:
466: =item MEAN(range)
467:
468: compute the average of the items in the range.
469:
470: =cut
471:
472: #-------------------------------------------------------
473: sub MEAN {
474: my $values=&get_values(@_);
475: my $sum=0;
476: my $num=0;
477: foreach (@$values) {
478: $sum+=$_;
479: $num++;
480: }
481: if ($num) {
482: return $sum/$num;
483: } else {
484: return undef;
485: }
486: }
487:
488: #-------------------------------------------------------
489:
490: =pod
491:
492: =item STDDEV(range)
493:
494: compute the standard deviation of the items in the range.
495:
496: =cut
497:
498: #-------------------------------------------------------
499: sub STDDEV {
500: my $values=&get_values(@_);
501: my $sum=0; my $num=0;
502: foreach (@$values) {
503: $sum+=$_;
504: $num++;
505: }
506: unless ($num>1) { return undef; }
507: my $mean=$sum/$num;
508: $sum=0;
509: foreach (@$values) {
510: $sum+=($_-$mean)**2;
511: }
512: return sqrt($sum/($num-1));
513: }
514:
515: #-------------------------------------------------------
516:
517: =pod
518:
519: =item PROD(range)
520:
521: compute the product of the items in the range.
522:
523: =cut
524:
525: #-------------------------------------------------------
526: sub PROD {
527: my $values=&get_values(@_);
528: my $prod=1;
529: foreach (@$values) {
530: $prod*=$_;
531: }
532: return $prod;
533: }
534:
535: #-------------------------------------------------------
536:
537: =pod
538:
539: =item MAX(range)
540:
541: compute the maximum of the items in the range.
542:
543: =cut
544:
545: #-------------------------------------------------------
546: sub MAX {
547: my $values=&get_values(@_);
548: my $max='-';
549: foreach (@$values) {
550: if (($_>$max) || ($max eq '-')) {
551: $max=$_;
552: }
553: }
554: return $max;
555: }
556:
557: #-------------------------------------------------------
558:
559: =pod
560:
561: =item MIN(range)
562:
563: compute the minimum of the items in the range.
564:
565: =cut
566:
567: #-------------------------------------------------------
568: sub MIN {
569: my $values=&get_values(@_);
570: my $min='-';
571: foreach (@$values) {
572: if (($_<$min) || ($min eq '-')) {
573: $min=$_;
574: }
575: }
576: return $min;
577: }
578:
579: #-------------------------------------------------------
580:
581: =pod
582:
583: =item SUMMAX(num,lower,upper)
584:
585: compute the sum of the largest 'num' items in the range from
586: 'lower' to 'upper'
587:
588: =cut
589:
590: #-------------------------------------------------------
591: sub SUMMAX {
592: my ($num,$lower,$upper)=@_;
593: my $values=&get_values($lower,$upper);
594: my @inside=sort {$a <=> $b} (@$values);
595: my $sum=0; my $i;
596: for ($i=$#inside;(($i>$#inside-$num) && ($i>=0));$i--) {
597: $sum+=$inside[$i];
598: }
599: return $sum;
600: }
601:
602: #-------------------------------------------------------
603:
604: =pod
605:
606: =item SUMMIN(num,lower,upper)
607:
608: compute the sum of the smallest 'num' items in the range from
609: 'lower' to 'upper'
610:
611: =cut
612:
613: #-------------------------------------------------------
614: sub SUMMIN {
615: my ($num,$lower,$upper)=@_;
616: my $values=&get_values($lower,$upper);
617: my @inside=sort {$a <=> $b} (@$values);
618: my $sum=0; my $i;
619: for ($i=0;(($i<$num) && ($i<=$#inside));$i++) {
620: $sum+=$inside[$i];
621: }
622: return $sum;
623: }
624:
625: #-------------------------------------------------------
626:
627: =pod
628:
629: =item MINPARM(parametername)
630:
631: Returns the minimum value of the parameters matching the parametername.
632: parametername should be a string such as 'duedate'.
633:
634: =cut
635:
636: #-------------------------------------------------------
637: sub MINPARM {
638: my ($expression) = @_;
639: my $min = undef;
640: foreach $parameter (keys(%c)) {
641: next if ($parameter !~ /$expression/);
642: if ((! defined($min)) || ($min > $c{$parameter})) {
643: $min = $c{$parameter}
644: }
645: }
646: return $min;
647: }
648:
649: #-------------------------------------------------------
650:
651: =pod
652:
653: =item MAXPARM(parametername)
654:
655: Returns the maximum value of the parameters matching the input parameter name.
656: parametername should be a string such as 'duedate'.
657:
658: =cut
659:
660: #-------------------------------------------------------
661: sub MAXPARM {
662: my ($expression) = @_;
663: my $max = undef;
664: foreach $parameter (keys(%c)) {
665: next if ($parameter !~ /$expression/);
666: if ((! defined($min)) || ($max < $c{$parameter})) {
667: $max = $c{$parameter}
668: }
669: }
670: return $max;
671: }
672:
673: #-------------------------------------------------------
674:
675: =pod
676:
677: =item &get_values($lower,$upper)
678:
679: Inputs: $lower and $upper, cell names ("X12" or "a150") or globs ("X*").
680:
681: Returns: an array ref of the values of the cells that exist in the
682: speced range
683:
684: =cut
685:
686: #-------------------------------------------------------
687: sub get_values {
688: my ($lower,$upper)=@_;
689: $upper = $lower if (! defined($upper));
690: my @values;
691: my ($la,$ld) = ($lower=~/([A-z]|\*)(\d+|\*)/);
692: my ($ua,$ud) = ($upper=~/([A-z]|\*)(\d+|\*)/);
693: my ($alpha,$num);
694: if ($ld ne '*' && $ud ne '*') {
695: my @alpha;
696: if (($la eq '*') || ($ua eq '*')) {
697: @alpha=('A'..'z');
698: } else {
699: if ($la gt $ua) { ($la,$ua)=($ua,$la); }
700: if ((lc($la) ne $la) && (lc($ua) eq $ua)) {
701: @alpha=($la..'Z','a'..$ua);
702: } else {
703: @alpha=($la..$ua);
704: }
705: }
706: my @num=($ld..$ud);
707: foreach my $a (@alpha) {
708: foreach my $n (@num) {
709: if (exists($sheet_values{$a.$n})) {
710: push(@values,$sheet_values{$a.$n});
711: }
712: }
713: }
714: return \@values;
715: } else {
716: $num = '(\d+)';
717: }
718: if (($la eq '*') || ($ua eq '*')) {
719: $alpha='[A-z]';
720: } else {
721: if ($la gt $ua) { ($la,$ua)=($ua,$la); }
722: $alpha=qq/[$la-$ua]/;
723: }
724: my $expression = '^'.$alpha.$num.'$';
725: foreach (grep /$expression/,keys(%sheet_values)) {
726: push(@values,$sheet_values{$_});
727: }
728: return \@values;
729: }
730:
731: sub calc {
732: %sheet_values = %t;
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: #
873: # Deal with the template row
874: foreach my $col ($self->template_cells()) {
875: next if ($col=~/^[A-Z]/);
876: foreach my $row ($self->rows()) {
877: # Get the name of this cell
878: my $cell=$col.$row;
879: # Grab the template declaration
880: $t{$cell}=$self->formula('template_'.$col);
881: # Replace '#' with the row number
882: $t{$cell}=~s/\#/$row/g;
883: # Replace '....' with ','
884: $t{$cell}=~s/\.\.+/\,/g;
885: # Replace 'A0' with the value from 'A0'
886: $t{$cell}=~s/(^|[^\"\'])([A-Za-z]\d+)/$1\$sheet_values\{\'$2\'\}/g;
887: # Replace parameters
888: $t{$cell}=~s/(^|[^\"\'])\[([^\]]+)\]/$1.$self->expandnamed($2)/ge;
889: }
890: }
891: #
892: # Deal with the normal cells
893: while (my($cell,$formula) = each(%{$self->{'formulas'}})) {
894: next if ($_=~/^template\_/);
895: my ($col,$row) = ($cell =~ /^([A-z])(\d+)$/);
896: if ($row eq '0') {
897: $t{$cell}=$formula;
898: $t{$cell}=~s/\.\.+/\,/g;
899: $t{$cell}=~s/(^|[^\"\'])([A-Za-z]\d+)/$1\$sheet_values\{\'$2\'\}/g;
900: $t{$cell}=~s/(^|[^\"\'])\[([^\]]+)\]/$1.$self->expandnamed($2)/ge;
901: } elsif ( $col =~ /^[A-Z]$/ ) {
902: if ($formula !~ /^\!/ && exists($self->{'constants'}->{$cell})
903: && $self->{'constants'}->{$cell} ne '') {
904: my $data = $self->{'constants'}->{$cell};
905: $t{$cell} = $data;
906: }
907: } else { # $row > 1 and $col =~ /[a-z]
908: $t{$cell}=$formula;
909: $t{$cell}=~s/\.\.+/\,/g;
910: $t{$cell}=~s/(^|[^\"\'])([A-Za-z]\d+)/$1\$sheet_values\{\'$2\'\}/g;
911: $t{$cell}=~s/(^|[^\"\'])\[([^\]]+)\]/$1.$self->expandnamed($2)/ge;
912: }
913: }
914: %{$self->{'safe'}->varglob('t')}=%t;
915: }
916:
917: ##
918: ## sync_safe_space: Called by calcsheet to make sure all the data we
919: # need to calculate is placed into the safe space
920: ##
921: sub sync_safe_space {
922: my $self = shift;
923: # Inside the safe space 'formulas' has a diabolical alter-ego named 'f'.
924: %{$self->{'safe'}->varglob('f')}=%{$self->{'formulas'}};
925: # 'constants' leads a peaceful hidden life of 'c'.
926: %{$self->{'safe'}->varglob('c')}=%{$self->{'constants'}};
927: # 'othersheets' hides as 'os', a disguise few can penetrate.
928: @{$self->{'safe'}->varglob('os')}=@{$self->{'othersheets'}};
929: }
930:
931: ##
932: ## Retrieve the error log from the safe space (used for debugging)
933: ##
934: sub get_errorlog {
935: my $self = shift;
936: $self->{'errorlog'} = $ { $self->{'safe'}->varglob('errorlog') };
937: return $self->{'errorlog'};
938: }
939:
940: ##
941: ## Clear the error log inside the safe space
942: ##
943: sub clear_errorlog {
944: my $self = shift;
945: $ {$self->{'safe'}->varglob('errorlog')} = '';
946: $self->{'errorlog'} = '';
947: }
948:
949: ##
950: ## constants: either set or get the constants
951: ##
952: sub constants {
953: my $self=shift;
954: my ($constants) = @_;
955: if (defined($constants)) {
956: if (! ref($constants)) {
957: my %tmp = @_;
958: $constants = \%tmp;
959: }
960: $self->{'constants'} = $constants;
961: return;
962: } else {
963: return %{$self->{'constants'}};
964: }
965: }
966:
967: ##
968: ## formulas: either set or get the formulas
969: ##
970: sub formulas {
971: my $self=shift;
972: my ($formulas) = @_;
973: if (defined($formulas)) {
974: if (! ref($formulas)) {
975: my %tmp = @_;
976: $formulas = \%tmp;
977: }
978: $self->{'formulas'} = $formulas;
979: $self->{'rows'} = [];
980: $self->{'template_cells'} = [];
981: return;
982: } else {
983: return %{$self->{'formulas'}};
984: }
985: }
986:
987: sub set_formula {
988: my $self = shift;
989: my ($cell,$formula) = @_;
990: $self->{'formulas'}->{$cell}=$formula;
991: return;
992: }
993:
994: ##
995: ## formulas_keys: Return the keys to the formulas hash.
996: ##
997: sub formulas_keys {
998: my $self = shift;
999: my @keys = keys(%{$self->{'formulas'}});
1000: return keys(%{$self->{'formulas'}});
1001: }
1002:
1003: ##
1004: ## formula: Return the formula for a given cell in the spreadsheet
1005: ## returns '' if the cell does not have a formula or does not exist
1006: ##
1007: sub formula {
1008: my $self = shift;
1009: my $cell = shift;
1010: if (defined($cell) && exists($self->{'formulas'}->{$cell})) {
1011: return $self->{'formulas'}->{$cell};
1012: }
1013: return '';
1014: }
1015:
1016: ##
1017: ## logthis: write the input to lonnet.log
1018: ##
1019: sub logthis {
1020: my $self = shift;
1021: my $message = shift;
1022: &Apache::lonnet::logthis($self->{'type'}.':'.
1023: $self->{'name'}.':'.$self->{'domain'}.':'.
1024: $message);
1025: return;
1026: }
1027:
1028: ##
1029: ## dump_formulas_to_log: makes lonnet.log huge...
1030: ##
1031: sub dump_formulas_to_log {
1032: my $self =shift;
1033: $self->logthis("Spreadsheet formulas");
1034: $self->logthis("--------------------------------------------------------");
1035: while (my ($cell, $formula) = each(%{$self->{'formulas'}})) {
1036: $self->logthis(' '.$cell.' = '.$formula);
1037: }
1038: $self->logthis("--------------------------------------------------------");}
1039:
1040: ##
1041: ## value: returns the computed value of a particular cell
1042: ##
1043: sub value {
1044: my $self = shift;
1045: my $cell = shift;
1046: if (defined($cell) && exists($self->{'values'}->{$cell})) {
1047: return $self->{'values'}->{$cell};
1048: }
1049: return '';
1050: }
1051:
1052: ##
1053: ## dump_values_to_log: makes lonnet.log huge...
1054: ##
1055: sub dump_values_to_log {
1056: my $self =shift;
1057: $self->logthis("Spreadsheet Values");
1058: $self->logthis("------------------------------------------------------");
1059: while (my ($cell, $value) = each(%{$self->{'values'}})) {
1060: $self->logthis(' '.$cell.' = '.$value);
1061: }
1062: $self->logthis("------------------------------------------------------");
1063: }
1064:
1065: ##
1066: ## Yet another debugging function
1067: ##
1068: sub dump_hash_to_log {
1069: my $self= shift();
1070: my %tmp = @_;
1071: if (@_<2) {
1072: %tmp = %{$_[0]};
1073: }
1074: $self->logthis('---------------------------- (begin hash dump)');
1075: while (my ($key,$val) = each (%tmp)) {
1076: $self->logthis(' '.$key.' = '.$val.':');
1077: }
1078: $self->logthis('---------------------------- (finished hash dump)');
1079: }
1080:
1081: ##
1082: ## rebuild_stats: rebuilds the rows and template_cells arrays
1083: ##
1084: sub rebuild_stats {
1085: my $self = shift;
1086: $self->{'rows'}=[];
1087: $self->{'template_cells'}=[];
1088: while (my ($cell,$formula) = each(%{$self->{'formulas'}})) {
1089: push(@{$self->{'rows'}},$1) if ($cell =~ /^A(\d+)/ && $1 != 0);
1090: push(@{$self->{'template_cells'}},$1) if ($cell =~ /^template_(\w+)/);
1091: }
1092: return;
1093: }
1094:
1095: ##
1096: ## template_cells returns a list of the cells defined in the template row
1097: ##
1098: sub template_cells {
1099: my $self = shift;
1100: $self->rebuild_stats() if (! defined($self->{'template_cells'}) ||
1101: ! @{$self->{'template_cells'}});
1102: return @{$self->{'template_cells'}};
1103: }
1104:
1105: ##
1106: ## Sigh....
1107: ##
1108: sub setothersheets {
1109: my $self = shift;
1110: my @othersheets = @_;
1111: $self->{'othersheets'} = \@othersheets;
1112: }
1113:
1114: ##
1115: ## rows returns a list of the names of cells defined in the A column
1116: ##
1117: sub rows {
1118: my $self = shift;
1119: $self->rebuild_stats() if (!@{$self->{'rows'}});
1120: return @{$self->{'rows'}};
1121: }
1122:
1123: #
1124: # calcsheet: makes all the calls to compute the spreadsheet.
1125: #
1126: sub calcsheet {
1127: my $self = shift;
1128: $self->sync_safe_space();
1129: $self->clear_errorlog();
1130: $self->sett();
1131: my $result = $self->{'safe'}->reval('&calc();');
1132: # $self->logthis($self->get_errorlog());
1133: %{$self->{'values'}} = %{$self->{'safe'}->varglob('sheet_values')};
1134: # $self->logthis($self->get_errorlog());
1135: if ($result ne 'okay') {
1136: $self->set_calcerror($result);
1137: }
1138: return $result;
1139: }
1140:
1141: sub set_badcalc {
1142: my $self = shift();
1143: $self->{'badcalc'} =1;
1144: return;
1145: }
1146:
1147: sub badcalc {
1148: my $self = shift;
1149: if (exists($self->{'badcalc'}) && $self->{'badcalc'}) {
1150: return 1;
1151: } else {
1152: return 0;
1153: }
1154: }
1155:
1156: sub set_calcerror {
1157: my $self = shift;
1158: if (@_) {
1159: $self->set_badcalc();
1160: if (exists($self->{'calcerror'})) {
1161: $self->{'calcerror'}.="\n".$_[0];
1162: } else {
1163: $self->{'calcerror'}.=$_[0];
1164: }
1165: }
1166: }
1167:
1168: sub calcerror {
1169: my $self = shift;
1170: if ($self->badcalc()) {
1171: if (exists($self->{'calcerror'})) {
1172: return $self->{'calcerror'};
1173: }
1174: }
1175: return;
1176: }
1177:
1178: ###########################################################
1179: ##
1180: ## Output Helpers
1181: ##
1182: ###########################################################
1183: sub display {
1184: my $self = shift;
1185: my ($r) = @_;
1186: my $outputmode = 'html';
1187: foreach ($self->output_options()) {
1188: if ($env{'form.output_format'} eq $_->{'value'}) {
1189: $outputmode = $_->{'value'};
1190: last;
1191: }
1192: }
1193: if ($outputmode eq 'html') {
1194: $self->compute($r);
1195: $self->outsheet_html($r);
1196: } elsif ($outputmode eq 'htmlclasslist') {
1197: # No computation neccessary... This is kludgy
1198: $self->outsheet_htmlclasslist($r);
1199: } elsif ($outputmode eq 'excel') {
1200: $self->compute($r);
1201: $self->outsheet_excel($r);
1202: } elsif ($outputmode eq 'csv') {
1203: $self->compute($r);
1204: $self->outsheet_csv($r);
1205: } elsif ($outputmode eq 'xml') {
1206: # $self->compute($r);
1207: $self->outsheet_xml($r);
1208: }
1209: $self->cleanup();
1210: return;
1211: }
1212:
1213: ############################################
1214: ## HTML output routines ##
1215: ############################################
1216: sub html_report_error {
1217: my $self = shift();
1218: my $Str = '';
1219: if ($self->badcalc()) {
1220: $Str = '<h3 style="color:red">'.
1221: &mt('An error occurred while calculating this spreadsheet').
1222: "</h3>\n".
1223: '<pre>'.$self->calcerror()."</pre>\n";
1224: }
1225: return $Str;
1226: }
1227:
1228: sub html_export_row {
1229: my $self = shift();
1230: my ($color) = @_;
1231: $color = '#CCCCFF' if (! defined($color));
1232: my $allowed = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
1233: my $row_html;
1234: my @rowdata = $self->get_row(0);
1235: foreach my $cell (@rowdata) {
1236: if ($cell->{'name'} =~ /^[A-Z]/) {
1237: $row_html .= '<td bgcolor="'.$color.'">'.
1238: &html_editable_cell($cell,$color,$allowed).'</td>';
1239: } else {
1240: $row_html .= '<td bgcolor="#DDCCFF">'.
1241: &html_editable_cell($cell,'#DDCCFF',$allowed).'</td>';
1242: }
1243: }
1244: return $row_html;
1245: }
1246:
1247: sub html_template_row {
1248: my $self = shift();
1249: my $allowed = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
1250: my ($num_uneditable,$importcolor) = @_;
1251: my $row_html;
1252: my @rowdata = $self->get_template_row();
1253: my $count = 0;
1254: for (my $i = 0; $i<=$#rowdata; $i++) {
1255: my $cell = $rowdata[$i];
1256: if ($i < $num_uneditable) {
1257: $row_html .= '<td bgcolor="'.$importcolor.'">'.
1258: &html_uneditable_cell($cell,'#FFDDDD',$allowed).'</td>';
1259: } else {
1260: $row_html .= '<td bgcolor="#EOFFDD">'.
1261: &html_editable_cell($cell,'#EOFFDD',$allowed).'</td>';
1262: }
1263: }
1264: return $row_html;
1265: }
1266:
1267: sub html_editable_cell {
1268: my ($cell,$bgcolor,$allowed) = @_;
1269: my $result;
1270: my ($name,$formula,$value);
1271: if (defined($cell)) {
1272: $name = $cell->{'name'};
1273: $formula = $cell->{'formula'};
1274: $value = $cell->{'value'};
1275: }
1276: $name = '' if (! defined($name));
1277: $formula = '' if (! defined($formula));
1278: if (! defined($value)) {
1279: $value = '<font color="'.$bgcolor.'">#</font>';
1280: if ($formula ne '') {
1281: $value = '<i>undefined value</i>';
1282: }
1283: } elsif ($value =~ /^\s*$/ ) {
1284: $value = '<font color="'.$bgcolor.'">#</font>';
1285: } else {
1286: $value = &HTML::Entities::encode($value,'<>&"') if ($value !~/ /);
1287: }
1288: return $value if (! $allowed);
1289: #
1290: # The formula will be parsed by the browser twice before being
1291: # displayed to the user for editing.
1292: #
1293: # The encoding string "^A-blah" is placed in []'s inside a regexp, so
1294: # we specify the characters we want left alone by putting a '^' in front.
1295: $formula = &HTML::Entities::encode($formula,'^A-z0-9 !#$%-;=?~');
1296: # HTML::Entities::encode does not catch everything - we need '\' encoded
1297: $formula =~ s/\\/&\#092/g;
1298: # Escape it again - this time the only encodable character is '&'
1299: $formula =~ s/\&/\&/g;
1300: # Glue everything together
1301: $result .= "<a href=\"javascript:celledit(\'".
1302: $name."','".$formula."');\">".$value."</a>";
1303: return $result;
1304: }
1305:
1306: sub html_uneditable_cell {
1307: my ($cell,$bgcolor) = @_;
1308: my $value = (defined($cell) ? $cell->{'value'} : '');
1309: $value = &HTML::Entities::encode($value,'<>&"') if ($value !~/ /);
1310: return ' '.$value.' ';
1311: }
1312:
1313: sub html_row {
1314: my $self = shift();
1315: my ($num_uneditable,$row,$exportcolor,$importcolor) = @_;
1316: my $allowed = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
1317: my @rowdata = $self->get_row($row);
1318: my $num_cols_output = 0;
1319: my $row_html;
1320: my $color = $importcolor;
1321: if ($row == 0) {
1322: $color = $exportcolor;
1323: }
1324: $color = '#FFDDDD' if (! defined($color));
1325: foreach my $cell (@rowdata) {
1326: if ($num_cols_output++ < $num_uneditable) {
1327: $row_html .= '<td bgcolor="'.$color.'">';
1328: $row_html .= &html_uneditable_cell($cell,'#FFDDDD');
1329: } else {
1330: $row_html .= '<td bgcolor="#EOFFDD">';
1331: $row_html .= &html_editable_cell($cell,'#E0FFDD',$allowed);
1332: }
1333: $row_html .= '</td>';
1334: }
1335: return $row_html;
1336: }
1337:
1338: sub html_header {
1339: my $self = shift;
1340: return '' if (! $env{'request.role.adv'});
1341: return "<table>\n".
1342: '<tr><th align="center">'.&mt('Output Format').'</th></tr>'."\n".
1343: '<tr><td>'.$self->output_selector()."</td></tr>\n".
1344: "</table>\n";
1345: }
1346:
1347: ##
1348: ## Default output types are HTML, Excel, and CSV
1349: sub output_options {
1350: my $self = shift();
1351: return ({value => 'html',
1352: description => 'HTML'},
1353: {value => 'excel',
1354: description => 'Excel'},
1355: # {value => 'xml',
1356: # description => 'XML'},
1357: {value => 'csv',
1358: description => 'Comma Separated Values'},);
1359: }
1360:
1361: sub output_selector {
1362: my $self = shift();
1363: my $output_selector = '<select name="output_format" size="3">'."\n";
1364: my $default = 'html';
1365: if (exists($env{'form.output_format'})) {
1366: $default = $env{'form.output_format'}
1367: } else {
1368: $env{'form.output_format'} = $default;
1369: }
1370: foreach ($self->output_options()) {
1371: $output_selector.='<option value="'.$_->{'value'}.'"';
1372: if ($_->{'value'} eq $default) {
1373: $output_selector .= ' selected';
1374: }
1375: $output_selector .= ">".&mt($_->{'description'})."</option>\n";
1376: }
1377: $output_selector .= "</select>\n";
1378: return $output_selector;
1379: }
1380:
1381: ################################################
1382: ## Excel output routines ##
1383: ################################################
1384: sub excel_output_row {
1385: my $self = shift;
1386: my ($worksheet,$rownum,$rows_output,@prepend) = @_;
1387: my $cols_output = 0;
1388: #
1389: my @rowdata = $self->get_row($rownum);
1390: foreach my $cell (@prepend,@rowdata) {
1391: my $value = $cell;
1392: $value = $cell->{'value'} if (ref($value));
1393: $value =~ s/\ / /gi;
1394: $worksheet->write($rows_output,$cols_output++,$value);
1395: }
1396: return;
1397: }
1398:
1399: #
1400: # This routine is just a stub
1401: sub outsheet_htmlclasslist {
1402: my $self = shift;
1403: my ($r) = @_;
1404: $r->print('<h2>'.&mt("This output is not supported").'</h2>');
1405: $r->rflush();
1406: return;
1407: }
1408:
1409: sub outsheet_excel {
1410: my $self = shift;
1411: my ($r) = @_;
1412: my $connection = $r->connection();
1413: #
1414: $r->print($self->html_report_error());
1415: $r->rflush();
1416: #
1417: $r->print("<h2>".&mt('Preparing Excel Spreadsheet')."</h2>");
1418: #
1419: # Create excel workbook
1420: my ($workbook,$filename,$format)=&Apache::loncommon::create_workbook($r);
1421: return if (! defined($workbook));
1422: #
1423: # Create main worksheet
1424: my $worksheet = $workbook->addworksheet('main');
1425: my $rows_output = 0;
1426: my $cols_output = 0;
1427: #
1428: # Write excel header
1429: foreach my $value ($self->get_title()) {
1430: $cols_output = 0;
1431: $worksheet->write($rows_output++,$cols_output,$value,$format->{'h1'});
1432: }
1433: $rows_output++; # skip a line
1434: #
1435: # Write summary/export row
1436: $cols_output = 0;
1437: $self->excel_output_row($worksheet,0,$rows_output++,'Summary',
1438: $format->{'b'});
1439: $rows_output++; # skip a line
1440: #
1441: $self->excel_rows($connection,$worksheet,$cols_output,$rows_output,
1442: $format);
1443: #
1444: #
1445: # Close the excel file
1446: $workbook->close();
1447: #
1448: # Write a link to allow them to download it
1449: $r->print('<br />'.
1450: '<a href="'.$filename.'">Your Excel spreadsheet.</a>'."\n");
1451: return;
1452: }
1453:
1454: #################################
1455: ## CSV output routines ##
1456: #################################
1457: sub outsheet_csv {
1458: my $self = shift;
1459: my ($r) = @_;
1460: my $connection = $r->connection();
1461: #
1462: $r->print($self->html_report_error());
1463: $r->rflush();
1464: #
1465: my $csvdata = '';
1466: my @Values;
1467: #
1468: # Open the csv file
1469: my $filename = '/prtspool/'.
1470: $env{'user.name'}.'_'.$env{'user.domain'}.'_'.
1471: time.'_'.rand(1000000000).'.csv';
1472: my $file;
1473: unless ($file = Apache::File->new('>'.'/home/httpd'.$filename)) {
1474: $r->log_error("Couldn't open $filename for output $!");
1475: $r->print(&mt("Problems occured in writing the csv file. ".
1476: "This error has been logged. ".
1477: "Please alert your LON-CAPA administrator."));
1478: $r->print("<pre>\n".$csvdata."</pre>\n");
1479: return 0;
1480: }
1481: #
1482: # Output the title information
1483: foreach my $value ($self->get_title()) {
1484: print $file "'".&Apache::loncommon::csv_translate($value)."'\n";
1485: }
1486: #
1487: # Output the body of the spreadsheet
1488: $self->csv_rows($connection,$file);
1489: #
1490: # Close the csv file
1491: close($file);
1492: $r->print('<br /><br />'.
1493: '<a href="'.$filename.'">'.&mt('Your CSV spreadsheet.').'</a>'."\n");
1494: #
1495: return 1;
1496: }
1497:
1498: sub csv_output_row {
1499: my $self = shift;
1500: my ($filehandle,$rownum,@prepend) = @_;
1501: #
1502: my @rowdata = ();
1503: if (defined($rownum)) {
1504: @rowdata = $self->get_row($rownum);
1505: }
1506: my @output = ();
1507: foreach my $cell (@prepend,@rowdata) {
1508: my $value = $cell;
1509: $value = $cell->{'value'} if (ref($value));
1510: $value =~ s/\ / /gi;
1511: $value = "'".$value."'";
1512: push (@output,$value);
1513: }
1514: print $filehandle join(',',@output )."\n";
1515: return;
1516: }
1517:
1518: ############################################
1519: ## XML output routines ##
1520: ############################################
1521: sub outsheet_xml {
1522: my $self = shift;
1523: my ($r) = @_;
1524: ## Someday XML
1525: ## Will be rendered for the user
1526: ## But not on this day
1527: my $Str = '<spreadsheet type="'.$self->{'type'}.'">'."\n";
1528: while (my ($cell,$formula) = each(%{$self->{'formulas'}})) {
1529: if ($cell =~ /^template_(\w+)/) {
1530: my $col = $1;
1531: $Str .= '<template col="'.$col.'">'.$formula.'</template>'."\n";
1532: } else {
1533: my ($col,$row) = ($cell =~ /^([A-z])(\d+)/);
1534: next if (! defined($row) || ! defined($col));
1535: next if ($row != 0);
1536: $Str .=
1537: '<field row="'.$row.'" col="'.$col.'" >'.$formula.'</field>'
1538: ."\n";
1539: }
1540: }
1541: $Str.="</spreadsheet>";
1542: $r->print("<pre>\n\n\n".$Str."\n\n\n</pre>");
1543: return $Str;
1544: }
1545:
1546: ############################################
1547: ### Filesystem routines ###
1548: ############################################
1549: sub parse_sheet {
1550: # $sheetxml is a scalar reference or a scalar
1551: my ($sheetxml) = @_;
1552: if (! ref($sheetxml)) {
1553: my $tmp = $sheetxml;
1554: $sheetxml = \$tmp;
1555: }
1556: my %formulas;
1557: my %sources;
1558: my $parser=HTML::TokeParser->new($sheetxml);
1559: my $token;
1560: while ($token=$parser->get_token) {
1561: if ($token->[0] eq 'S') {
1562: if ($token->[1] eq 'field') {
1563: my $cell = $token->[2]->{'col'}.$token->[2]->{'row'};
1564: my $source = $token->[2]->{'source'};
1565: my $formula = $parser->get_text('/field');
1566: $formulas{$cell} = $formula;
1567: $sources{$cell} = $source if (defined($source));
1568: $parser->get_text('/field');
1569: } elsif ($token->[1] eq 'template') {
1570: $formulas{'template_'.$token->[2]->{'col'}}=
1571: $parser->get_text('/template');
1572: }
1573: }
1574: }
1575: return (\%formulas,\%sources);
1576: }
1577:
1578: {
1579:
1580: my %spreadsheets;
1581:
1582: sub clear_spreadsheet_definition_cache {
1583: undef(%spreadsheets);
1584: }
1585:
1586: sub load_system_default_sheet {
1587: my $self = shift;
1588: my $includedir = $Apache::lonnet::perlvar{'lonIncludes'};
1589: # load in the default defined spreadsheet
1590: my $sheetxml='';
1591: my $fh;
1592: if ($fh=Apache::File->new($includedir.'/default_'.$self->{'type'})) {
1593: $sheetxml=join('',<$fh>);
1594: $fh->close();
1595: } else {
1596: # $sheetxml='<field row="0" col="A">"Error"</field>';
1597: $sheetxml='<field row="0" col="A"></field>';
1598: }
1599: $self->filename('default_');
1600: my ($formulas,undef) = &parse_sheet(\$sheetxml);
1601: return $formulas;
1602: }
1603:
1604: sub load {
1605: my $self = shift;
1606: #
1607: my $stype = $self->{'type'};
1608: my $cnum = $self->{'cnum'};
1609: my $cdom = $self->{'cdom'};
1610: my $chome = $self->{'chome'};
1611: #
1612: my $filename = $self->filename();
1613: my $cachekey = join('_',($cnum,$cdom,$stype,$filename));
1614: #
1615: # see if sheet is cached
1616: my ($formulas);
1617: if (exists($spreadsheets{$cachekey})) {
1618: $formulas = $spreadsheets{$cachekey}->{'formulas'};
1619: } else {
1620: # Not cached, need to read
1621: if (! defined($filename)) {
1622: $formulas = $self->load_system_default_sheet();
1623: } elsif($filename =~ /^\/res\/.*\.spreadsheet$/) {
1624: # Load a spreadsheet definition file
1625: my $sheetxml=&Apache::lonnet::getfile
1626: (&Apache::lonnet::filelocation('',$filename));
1627: if ($sheetxml == -1) {
1628: $sheetxml='<field row="0" col="A">"Error loading spreadsheet '
1629: .$self->filename().'"</field>';
1630: }
1631: ($formulas,undef) = &parse_sheet(\$sheetxml);
1632: # Get just the filename and set the sheets filename
1633: my ($newfilename) = ($filename =~ /\/([^\/]*)\.spreadsheet$/);
1634: if ($self->is_default()) {
1635: $self->filename($newfilename);
1636: $self->make_default();
1637: } else {
1638: $self->filename($newfilename);
1639: }
1640: } else {
1641: # Load the spreadsheet definition file from the save file
1642: my %tmphash = &Apache::lonnet::dump($filename,$cdom,$cnum);
1643: my ($tmp) = keys(%tmphash);
1644: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
1645: while (my ($cell,$formula) = each(%tmphash)) {
1646: $formulas->{$cell}=$formula;
1647: }
1648: } else {
1649: $formulas = $self->load_system_default_sheet();
1650: }
1651: }
1652: $filename=$self->filename(); # filename may have changed
1653: $cachekey = join('_',($cnum,$cdom,$stype,$filename));
1654: %{$spreadsheets{$cachekey}->{'formulas'}} = %{$formulas};
1655: }
1656: $self->formulas($formulas);
1657: $self->set_row_sources();
1658: $self->set_row_numbers();
1659: }
1660:
1661: sub set_row_sources {
1662: my $self = shift;
1663: while (my ($cell,$value) = each(%{$self->{'formulas'}})) {
1664: next if ($cell !~ /^A(\d+)/ || $1 < 1);
1665: my $row = $1;
1666: $self->{'row_source'}->{$row} = $value;
1667: }
1668: return;
1669: }
1670:
1671: sub set_row_numbers {
1672: my $self = shift;
1673: while (my ($cell,$value) = each(%{$self->{'formulas'}})) {
1674: next if ($cell !~ /^A(\d+)$/);
1675: next if (! defined($value));
1676: $self->{'row_numbers'}->{$value} = $1;
1677: $self->{'maxrow'} = $1 if ($1 > $self->{'maxrow'});
1678: }
1679: }
1680:
1681: ##
1682: ## exportrow is *not* used to get the export row from a computed sub-sheet.
1683: ##
1684: sub exportrow {
1685: my $self = shift;
1686: if (exists($self->{'badcalc'}) && $self->{'badcalc'}) {
1687: return ();
1688: }
1689: my @exportarray;
1690: foreach my $column (@UC_Columns) {
1691: push(@exportarray,$self->value($column.'0'));
1692: }
1693: return @exportarray;
1694: }
1695:
1696: sub save {
1697: my $self = shift;
1698: my ($makedef)=@_;
1699: my $cid=$self->{'cid'};
1700: # If we are saving it, it must not be temporary
1701: $self->temporary(0);
1702: if (&Apache::lonnet::allowed('opa',$cid)) {
1703: my %f=$self->formulas();
1704: my $stype = $self->{'type'};
1705: my $cnum = $self->{'cnum'};
1706: my $cdom = $self->{'cdom'};
1707: my $chome = $self->{'chome'};
1708: my $filename = $self->{'filename'};
1709: my $cachekey = join('_',($cnum,$cdom,$stype,$filename));
1710: # Cache new sheet
1711: %{$spreadsheets{$cachekey}->{'formulas'}}=%f;
1712: # Write sheet
1713: foreach (keys(%f)) {
1714: delete($f{$_}) if ($f{$_} eq 'import');
1715: }
1716: my $reply = &Apache::lonnet::put($filename,\%f,$cdom,$cnum);
1717: return $reply if ($reply ne 'ok');
1718: $reply = &Apache::lonnet::put($stype.'_spreadsheets',
1719: {$filename => $env{'user.name'}.'@'.$env{'user.domain'}},
1720: $cdom,$cnum);
1721: return $reply if ($reply ne 'ok');
1722: if ($makedef) {
1723: $reply = &Apache::lonnet::put('environment',
1724: {'spreadsheet_default_'.$stype => $filename },
1725: $cdom,$cnum);
1726: return $reply if ($reply ne 'ok');
1727: }
1728: if ($self->is_default()) {
1729: if ($self->{'type'} eq 'studentcalc') {
1730: &Apache::lonnet::expirespread('','','studentcalc','');
1731: } elsif ($self->{'type'} eq 'assesscalc') {
1732: &Apache::lonnet::expirespread('','','assesscalc','');
1733: &Apache::lonnet::expirespread('','','studentcalc','');
1734: }
1735: }
1736: return $reply;
1737: }
1738: return 'unauthorized';
1739: }
1740:
1741: } # end of scope for %spreadsheets
1742:
1743: sub save_tmp {
1744: my $self = shift;
1745: my $filename=$env{'user.name'}.'_'.
1746: $env{'user.domain'}.'_spreadsheet_'.$self->{'symb'}.'_'.
1747: $self->{'filename'};
1748: $filename=~s/\W/\_/g;
1749: $filename=$Apache::lonnet::tmpdir.$filename.'.tmp';
1750: $self->temporary(1);
1751: my $fh;
1752: if ($fh=Apache::File->new('>'.$filename)) {
1753: my %f = $self->formulas();
1754: while( my ($cell,$formula) = each(%f)) {
1755: next if ($formula eq 'import');
1756: print $fh &Apache::lonnet::escape($cell)."=".
1757: &Apache::lonnet::escape($formula)."\n";
1758: }
1759: $fh->close();
1760: }
1761: }
1762:
1763: sub load_tmp {
1764: my $self = shift;
1765: my $filename=$env{'user.name'}.'_'.
1766: $env{'user.domain'}.'_spreadsheet_'.$self->{'symb'}.'_'.
1767: $self->{'filename'};
1768: $filename=~s/\W/\_/g;
1769: $filename=$Apache::lonnet::tmpdir.$filename.'.tmp';
1770: my %formulas = ();
1771: if (my $spreadsheet_file = Apache::File->new($filename)) {
1772: while (<$spreadsheet_file>) {
1773: chomp;
1774: my ($cell,$formula) = split(/=/);
1775: $cell = &Apache::lonnet::unescape($cell);
1776: $formula = &Apache::lonnet::unescape($formula);
1777: $formulas{$cell} = $formula;
1778: }
1779: $spreadsheet_file->close();
1780: }
1781: # flag the sheet as temporary
1782: $self->temporary(1);
1783: $self->formulas(\%formulas);
1784: $self->set_row_sources();
1785: $self->set_row_numbers();
1786: return;
1787: }
1788:
1789: sub temporary {
1790: my $self=shift;
1791: if (@_) {
1792: ($self->{'temporary'})= @_;
1793: }
1794: return $self->{'temporary'};
1795: }
1796:
1797: sub modify_cell {
1798: # studentcalc overrides this
1799: my $self = shift;
1800: my ($cell,$formula) = @_;
1801: if ($cell =~ /([A-z])\-/) {
1802: $cell = 'template_'.$1;
1803: } elsif ($cell !~ /^([A-z](\d+)|template_[A-z])$/) {
1804: return;
1805: }
1806: $self->set_formula($cell,$formula);
1807: $self->rebuild_stats();
1808: return;
1809: }
1810:
1811: ###########################################
1812: # othersheets: Returns the list of other spreadsheets available
1813: ###########################################
1814: sub othersheets {
1815: my $self = shift();
1816: my ($stype) = @_;
1817: $stype = $self->{'type'} if (! defined($stype) || $stype !~ /calc$/);
1818: #
1819: my @alternatives=();
1820: my %results=&Apache::lonnet::dump($stype.'_spreadsheets',
1821: $self->{'cdom'}, $self->{'cnum'});
1822: my ($tmp) = keys(%results);
1823: if ($tmp =~ /^(con_lost|error|no_such_host)/i ) {
1824: @alternatives = (&mt('Default'));
1825: } else {
1826: @alternatives = (&mt('Default'), sort (keys(%results)));
1827: }
1828: return @alternatives;
1829: }
1830:
1831: sub blackout {
1832: my $self = shift;
1833: $self->{'blackout'} = $_[0] if (@_);
1834: return $self->{'blackout'};
1835: }
1836:
1837: sub get_row {
1838: my $self = shift;
1839: my ($n)=@_;
1840: my @cols=();
1841: foreach my $col (@UC_Columns,@LC_Columns) {
1842: my $cell = $col.$n;
1843: push(@cols,{ name => $cell,
1844: formula => $self->formula($cell),
1845: value => $self->value($cell)});
1846: }
1847: return @cols;
1848: }
1849:
1850: sub get_template_row {
1851: my $self = shift;
1852: my @cols=();
1853: foreach my $col (@UC_Columns,@LC_Columns) {
1854: my $cell = 'template_'.$col;
1855: push(@cols,{ name => $cell,
1856: formula => $self->formula($cell),
1857: value => $self->formula($cell) });
1858: }
1859: return @cols;
1860: }
1861:
1862: sub need_to_save {
1863: my $self = shift;
1864: if ($self->{'new_rows'} && ! $self->temporary()) {
1865: return 1;
1866: }
1867: return 0;
1868: }
1869:
1870: sub get_row_number_from_key {
1871: my $self = shift;
1872: my ($key) = @_;
1873: if (! exists($self->{'row_numbers'}->{$key}) ||
1874: ! defined($self->{'row_numbers'}->{$key})) {
1875: # I used to set $f here to the new value, but the key passed for lookup
1876: # may not be the key we need to save
1877: $self->{'maxrow'}++;
1878: $self->{'row_numbers'}->{$key} = $self->{'maxrow'};
1879: # $self->logthis('added row '.$self->{'row_numbers'}->{$key}.
1880: # ' for '.$key);
1881: $self->{'new_rows'} = 1;
1882: }
1883: return $self->{'row_numbers'}->{$key};
1884: }
1885:
1886: 1;
1887:
1888: __END__
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