1: #
2: # $Id: Spreadsheet.pm,v 1.24 2003/09/08 20:32:22 matthew Exp $
3: #
4: # Copyright Michigan State University Board of Trustees
5: #
6: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
7: #
8: # LON-CAPA is free software; you can redistribute it and/or modify
9: # it under the terms of the GNU General Public License as published by
10: # the Free Software Foundation; either version 2 of the License, or
11: # (at your option) any later version.
12: #
13: # LON-CAPA is distributed in the hope that it will be useful,
14: # but WITHOUT ANY WARRANTY; without even the implied warranty of
15: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16: # GNU General Public License for more details.
17: #
18: # You should have received a copy of the GNU General Public License
19: # along with LON-CAPA; if not, write to the Free Software
20: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21: #
22: # /home/httpd/html/adm/gpl.txt
23: #
24: # http://www.lon-capa.org/
25: #
26: # The LearningOnline Network with CAPA
27: # Spreadsheet/Grades Display Handler
28: #
29: # POD required stuff:
30:
31: =head1 NAME
32:
33: Spreadsheet
34:
35: =head1 SYNOPSIS
36:
37: =head1 DESCRIPTION
38:
39: =over 4
40:
41: =cut
42:
43: ###################################################
44: ###################################################
45: ### Spreadsheet ###
46: ###################################################
47: ###################################################
48: package Apache::Spreadsheet;
49:
50: use strict;
51: #use 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:
63: ##
64: ## Package Variables
65: ##
66: my %expiredates;
67:
68: my @UC_Columns = split(//,'ABCDEFGHIJKLMNOPQRSTUVWXYZ');
69: my @LC_Columns = split(//,'abcdefghijklmnopqrstuvwxyz');
70:
71: ######################################################
72:
73: =pod
74:
75: =item &new
76:
77: Returns a new spreadsheet object.
78:
79: =cut
80:
81: ######################################################
82: sub new {
83: my $this = shift;
84: my $class = ref($this) || $this;
85: my ($stype) = ($class =~ /Apache::(.*)$/);
86: #
87: my ($name,$domain,$filename,$usymb)=@_;
88: #
89: my $self = {
90: name => $name,
91: domain => $domain,
92: type => $stype,
93: symb => $usymb,
94: errorlog => '',
95: maxrow => 0,
96: cid => $ENV{'request.course.id'},
97: cnum => $ENV{'course.'.$ENV{'request.course.id'}.'.num'},
98: cdom => $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
99: chome => $ENV{'course.'.$ENV{'request.course.id'}.'.home'},
100: coursedesc => $ENV{'course.'.$ENV{'request.course.id'}.'.description'},
101: coursefilename => $ENV{'request.course.fn'},
102: #
103: # Flags
104: temporary => 0, # true if this sheet has been modified but not saved
105: new_rows => 0, # true if this sheet has new rows
106: #
107: # blackout is used to determine if any data needs to be hidden from the
108: # student.
109: blackout => 0,
110: #
111: # Data storage
112: formulas => {},
113: constants => {},
114: rows => [],
115: row_source => {},
116: othersheets => [],
117: };
118: #
119: $self->{'uhome'} = &Apache::lonnet::homeserver($name,$domain);
120: #
121: bless($self,$class);
122: #
123: # Load in the spreadsheet definition
124: $self->filename($filename);
125: if (exists($ENV{'form.workcopy'}) &&
126: $self->{'type'} eq $ENV{'form.workcopy'}) {
127: $self->load_tmp();
128: } else {
129: $self->load();
130: }
131: return $self;
132: }
133:
134: ######################################################
135:
136: =pod
137:
138: =item &filename
139:
140: get or set the filename for a spreadsheet.
141:
142: =cut
143:
144: ######################################################
145: sub filename {
146: my $self = shift();
147: if (@_) {
148: my ($newfilename) = @_;
149: if (! defined($newfilename) || $newfilename eq 'Default' ||
150: $newfilename !~ /\w/ || $newfilename eq '') {
151: my $key = 'course.'.$self->{'cid'}.'.spreadsheet_default_'.
152: $self->{'type'};
153: if (exists($ENV{$key}) && $ENV{$key} ne '') {
154: $newfilename = $ENV{$key};
155: } else {
156: $newfilename = 'default_'.$self->{'type'};
157: }
158: }
159: if ($newfilename !~ /\w/ || $newfilename =~ /^\W*$/) {
160: $newfilename = 'default_'.$self->{'type'};
161: }
162: if ($newfilename !~ /^default\.$self->{'type'}$/ ) {
163: if ($newfilename !~ /_$self->{'type'}$/) {
164: $newfilename =~ s/[\s_]*$//;
165: $newfilename .= '_'.$self->{'type'};
166: }
167: }
168: $self->{'filename'} = $newfilename;
169: return;
170: }
171: return $self->{'filename'};
172: }
173:
174: ######################################################
175:
176: =pod
177:
178: =item &make_default()
179:
180: Make the current spreadsheet file the default for the course. Expires all the
181: default spreadsheets.......!
182:
183: =cut
184:
185: ######################################################
186: sub make_default {
187: my $self = shift();
188: my $result = &Apache::lonnet::put('environment',
189: {'spreadsheet_default_'.$self->{'type'} => $self->filename()},
190: $self->{'cdom'},$self->{'cnum'});
191: return $result if ($result ne 'ok');
192: my $symb = $self->{'symb'};
193: $symb = '' if (! defined($symb));
194: &Apache::lonnet::expirespread('','',$self->{'type'},$symb);
195: }
196:
197: ######################################################
198:
199: =pod
200:
201: =item &is_default()
202:
203: Returns 1 if the current spreadsheet is the default as specified in the
204: course environment. Returns 0 otherwise.
205:
206: =cut
207:
208: ######################################################
209: sub is_default {
210: my $self = shift;
211: # Check to find out if we are the default spreadsheet (filenames match)
212: my $default_filename = '';
213: my %tmphash = &Apache::lonnet::get('environment',
214: ['spreadsheet_default_'.
215: $self->{'type'}],
216: $self->{'cdom'},
217: $self->{'cnum'});
218: my ($tmp) = keys(%tmphash);
219: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
220: $default_filename = $tmphash{'spreadsheet_default_'.$self->{'type'}};
221: }
222: if ($default_filename =~ /^\s*$/) {
223: $default_filename = 'default_'.$self->{'type'};
224: }
225: return 1 if ($self->filename() eq $default_filename);
226: return 0;
227: }
228:
229: sub initialize {
230: # This method is here to remind you that it will be overridden by
231: # the descendents of the spreadsheet class.
232: }
233:
234: sub clear_package {
235: # This method is here to remind you that it will be overridden by
236: # the descendents of the spreadsheet class.
237: }
238:
239: sub cleanup {
240: my $self = shift();
241: $self->clear_package();
242: }
243:
244: sub initialize_spreadsheet_package {
245: &load_spreadsheet_expirationdates();
246: &clear_spreadsheet_definition_cache();
247: }
248:
249: sub load_spreadsheet_expirationdates {
250: undef %expiredates;
251: my $cid=$ENV{'request.course.id'};
252: my @tmp = &Apache::lonnet::dump('nohist_expirationdates',
253: $ENV{'course.'.$cid.'.domain'},
254: $ENV{'course.'.$cid.'.num'});
255: if (lc($tmp[0]) !~ /^error/){
256: %expiredates = @tmp;
257: }
258: }
259:
260: sub check_expiration_time {
261: my $self = shift;
262: my ($time)=@_;
263: return 0 if (! defined($time));
264: my ($key1,$key2,$key3,$key4,$key5);
265: # Description of keys
266: #
267: # key1: all sheets of this type have expired
268: # key2: all sheets of this type for this student
269: # key3: all sheets of this type in this map for this student
270: # key4: this assessment sheet for this student
271: # key5: this assessment sheet for all students
272: $key1 = '::'.$self->{'type'}.':';
273: $key2 = $self->{'name'}.':'.$self->{'domain'}.':'.$self->{'type'}.':';
274: $key3 = $key2.$self->{'container'} if (defined($self->{'container'}));
275: $key4 = $key2.$self->{'symb'} if (defined($self->{'symb'}));
276: $key5 = $key1.$self->{'symb'} if (defined($self->{'symb'}));
277: my $returnvalue = 1; # default to okay
278: foreach my $key ($key1,$key2,$key3,$key4,$key5) {
279: next if (! defined($key));
280: if (exists($expiredates{$key}) && $expiredates{$key} > $time) {
281: $returnvalue = 0; # need to recompute
282: }
283: }
284: return $returnvalue;
285: }
286:
287: ######################################################
288:
289: =pod
290:
291: =item &initialize_safe_space
292:
293: Returns the safe space required by a Spreadsheet object.
294:
295: =head 2 Safe Space Functions
296:
297: =over 4
298:
299: =cut
300:
301: ######################################################
302: sub initialize_safe_space {
303: my $self = shift;
304: my $safeeval = new Safe(shift);
305: my $safehole = new Safe::Hole;
306: $safeeval->permit("entereval");
307: $safeeval->permit(":base_math");
308: $safeeval->permit("sort");
309: $safeeval->deny(":base_io");
310: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
311: $safehole->wrap(\&mask,$safeeval,'&mask');
312: $safeeval->share('$@');
313: my $code=<<'ENDDEFS';
314: # ---------------------------------------------------- Inside of the safe space
315: #
316: # f: formulas
317: # t: intermediate format (variable references expanded)
318: # v: output values
319: # c: preloaded constants (A-column)
320: # rl: row label
321: # os: other spreadsheets (for student spreadsheet only)
322: undef %sheet_values; # Holds the (computed, final) values for the sheet
323: # This is only written to by &calc, the spreadsheet computation routine.
324: # It is read by many functions
325: undef %t; # Holds the values of the spreadsheet temporarily. Set in &sett,
326: # which does the translation of strings like C5 into the value in C5.
327: # Used in &calc - %t holds the values that are actually eval'd.
328: undef %f; # Holds the formulas for each cell. This is the users
329: # (spreadsheet authors) data for each cell.
330: undef %c; # Holds the constants for a sheet. In the assessment
331: # sheets, this is the A column. Used in &MINPARM, &MAXPARM, &expandnamed,
332: # &sett, and &constants. There is no &getconstants.
333: # &constants is called by &loadstudent, &loadcourse, &load assessment,
334: undef @os; # Holds the names of other spreadsheets - this is used to specify
335: # the spreadsheets that are available for the assessment sheet.
336: # Set by &setothersheets. &setothersheets is called by &handler. A
337: # related subroutine is &othersheets.
338: $errorlog = '';
339: #
340: $maxrow = 0;
341: $type = '';
342: #
343: # filename/reference of the sheet
344: $filename = '';
345: #
346: # user data
347: $name = '';
348: $uhome = '';
349: $domain = '';
350: #
351: # course data
352: $csec = '';
353: $chome= '';
354: $cnum = '';
355: $cdom = '';
356: $cid = '';
357: $coursefilename = '';
358: #
359: # symb
360: $usymb = '';
361: #
362: # error messages
363: $errormsg = '';
364: #
365: #-------------------------------------------------------
366:
367: =pod
368:
369: =item NUM(range)
370:
371: returns the number of items in the range.
372:
373: =cut
374:
375: #-------------------------------------------------------
376: sub NUM {
377: my $mask=&mask(@_);
378: my $num= $#{@{grep(/$mask/,keys(%sheet_values))}}+1;
379: return $num;
380: }
381:
382: #-------------------------------------------------------
383:
384: =pod
385:
386: =item BIN(low,high,lower,upper)
387:
388: =cut
389:
390: #-------------------------------------------------------
391: sub BIN {
392: my ($low,$high,$lower,$upper)=@_;
393: my $mask=&mask($lower,$upper);
394: my $num=0;
395: foreach (grep /$mask/,keys(%sheet_values)) {
396: if (($sheet_values{$_}>=$low) && ($sheet_values{$_}<=$high)) {
397: $num++;
398: }
399: }
400: return $num;
401: }
402:
403: #-------------------------------------------------------
404:
405: =pod
406:
407: =item SUM(range)
408:
409: returns the sum of items in the range.
410:
411: =cut
412:
413: #-------------------------------------------------------
414: sub SUM {
415: my $mask=&mask(@_);
416: my $sum=0;
417: foreach (grep /$mask/,keys(%sheet_values)) {
418: $sum+=$sheet_values{$_};
419: }
420: return $sum;
421: }
422:
423: #-------------------------------------------------------
424:
425: =pod
426:
427: =item MEAN(range)
428:
429: compute the average of the items in the range.
430:
431: =cut
432:
433: #-------------------------------------------------------
434: sub MEAN {
435: my $mask=&mask(@_);
436: my $sum=0;
437: my $num=0;
438: foreach (grep /$mask/,keys(%sheet_values)) {
439: $sum+=$sheet_values{$_};
440: $num++;
441: }
442: if ($num) {
443: return $sum/$num;
444: } else {
445: return undef;
446: }
447: }
448:
449: #-------------------------------------------------------
450:
451: =pod
452:
453: =item STDDEV(range)
454:
455: compute the standard deviation of the items in the range.
456:
457: =cut
458:
459: #-------------------------------------------------------
460: sub STDDEV {
461: my $mask=&mask(@_);
462: my $sum=0; my $num=0;
463: foreach (grep /$mask/,keys(%sheet_values)) {
464: $sum+=$sheet_values{$_};
465: $num++;
466: }
467: unless ($num>1) { return undef; }
468: my $mean=$sum/$num;
469: $sum=0;
470: foreach (grep /$mask/,keys(%sheet_values)) {
471: $sum+=($sheet_values{$_}-$mean)**2;
472: }
473: return sqrt($sum/($num-1));
474: }
475:
476: #-------------------------------------------------------
477:
478: =pod
479:
480: =item PROD(range)
481:
482: compute the product of the items in the range.
483:
484: =cut
485:
486: #-------------------------------------------------------
487: sub PROD {
488: my $mask=&mask(@_);
489: my $prod=1;
490: foreach (grep /$mask/,keys(%sheet_values)) {
491: $prod*=$sheet_values{$_};
492: }
493: return $prod;
494: }
495:
496: #-------------------------------------------------------
497:
498: =pod
499:
500: =item MAX(range)
501:
502: compute the maximum of the items in the range.
503:
504: =cut
505:
506: #-------------------------------------------------------
507: sub MAX {
508: my $mask=&mask(@_);
509: my $max='-';
510: foreach (grep /$mask/,keys(%sheet_values)) {
511: unless ($max) { $max=$sheet_values{$_}; }
512: if (($sheet_values{$_}>$max) || ($max eq '-')) {
513: $max=$sheet_values{$_};
514: }
515: }
516: return $max;
517: }
518:
519: #-------------------------------------------------------
520:
521: =pod
522:
523: =item MIN(range)
524:
525: compute the minimum of the items in the range.
526:
527: =cut
528:
529: #-------------------------------------------------------
530: sub MIN {
531: my $mask=&mask(@_);
532: my $min='-';
533: foreach (grep /$mask/,keys(%sheet_values)) {
534: unless ($max) { $max=$sheet_values{$_}; }
535: if (($sheet_values{$_}<$min) || ($min eq '-')) {
536: $min=$sheet_values{$_};
537: }
538: }
539: return $min;
540: }
541:
542: #-------------------------------------------------------
543:
544: =pod
545:
546: =item SUMMAX(num,lower,upper)
547:
548: compute the sum of the largest 'num' items in the range from
549: 'lower' to 'upper'
550:
551: =cut
552:
553: #-------------------------------------------------------
554: sub SUMMAX {
555: my ($num,$lower,$upper)=@_;
556: my $mask=&mask($lower,$upper);
557: my @inside=();
558: foreach (grep /$mask/,keys(%sheet_values)) {
559: push (@inside,$sheet_values{$_});
560: }
561: @inside=sort(@inside);
562: my $sum=0; my $i;
563: for ($i=$#inside;(($i>$#inside-$num) && ($i>=0));$i--) {
564: $sum+=$inside[$i];
565: }
566: return $sum;
567: }
568:
569: #-------------------------------------------------------
570:
571: =pod
572:
573: =item SUMMIN(num,lower,upper)
574:
575: compute the sum of the smallest 'num' items in the range from
576: 'lower' to 'upper'
577:
578: =cut
579:
580: #-------------------------------------------------------
581: sub SUMMIN {
582: my ($num,$lower,$upper)=@_;
583: my $mask=&mask($lower,$upper);
584: my @inside=();
585: foreach (grep /$mask/,keys(%sheet_values)) {
586: $inside[$#inside+1]=$sheet_values{$_};
587: }
588: @inside=sort(@inside);
589: my $sum=0; my $i;
590: for ($i=0;(($i<$num) && ($i<=$#inside));$i++) {
591: $sum+=$inside[$i];
592: }
593: return $sum;
594: }
595:
596: #-------------------------------------------------------
597:
598: =pod
599:
600: =item MINPARM(parametername)
601:
602: Returns the minimum value of the parameters matching the parametername.
603: parametername should be a string such as 'duedate'.
604:
605: =cut
606:
607: #-------------------------------------------------------
608: sub MINPARM {
609: my ($expression) = @_;
610: my $min = undef;
611: study($expression);
612: foreach $parameter (keys(%c)) {
613: next if ($parameter !~ /$expression/);
614: if ((! defined($min)) || ($min > $c{$parameter})) {
615: $min = $c{$parameter}
616: }
617: }
618: return $min;
619: }
620:
621: #-------------------------------------------------------
622:
623: =pod
624:
625: =item MAXPARM(parametername)
626:
627: Returns the maximum value of the parameters matching the input parameter name.
628: parametername should be a string such as 'duedate'.
629:
630: =cut
631:
632: #-------------------------------------------------------
633: sub MAXPARM {
634: my ($expression) = @_;
635: my $max = undef;
636: study($expression);
637: foreach $parameter (keys(%c)) {
638: next if ($parameter !~ /$expression/);
639: if ((! defined($min)) || ($max < $c{$parameter})) {
640: $max = $c{$parameter}
641: }
642: }
643: return $max;
644: }
645:
646:
647: sub calc {
648: %sheet_values = %t;
649: my $notfinished = 1;
650: my $lastcalc = '';
651: my $depth = 0;
652: while ($notfinished) {
653: $notfinished=0;
654: while (my ($cell,$value) = each(%t)) {
655: my $old=$sheet_values{$cell};
656: $sheet_values{$cell}=eval $value;
657: # $errorlog .= $cell.' = '.$old.'->'.$sheet_values{$cell}."\n";
658: if ($@) {
659: undef %sheet_values;
660: return $cell.': '.$@;
661: }
662: if ($sheet_values{$cell} ne $old) {
663: $notfinished=1;
664: $lastcalc=$cell;
665: }
666: }
667: # $errorlog.="------------------------------------------------";
668:
669: $depth++;
670: if ($depth>100) {
671: undef %sheet_values;
672: return $lastcalc.': Maximum calculation depth exceeded';
673: }
674: }
675: return '';
676: }
677:
678: # ------------------------------------------- End of "Inside of the safe space"
679: ENDDEFS
680: $safeeval->reval($code);
681: $self->{'safe'} = $safeeval;
682: $self->{'root'} = $self->{'safe'}->root();
683: #
684: # Place some of the %$self items into the safe space except the safe space
685: # itself
686: my $initstring = '';
687: foreach (qw/name domain type usymb cid csec coursefilename
688: cnum cdom chome uhome/) {
689: $initstring.= qq{\$$_="$self->{$_}";};
690: }
691: $self->{'safe'}->reval($initstring);
692: return $self;
693: }
694: ######################################################
695:
696: =pod
697:
698: =back
699:
700: =cut
701:
702: ######################################################
703:
704:
705: ######################################################
706:
707:
708: ######################################################
709: {
710:
711: my %memoizer;
712:
713: sub mask {
714: my ($lower,$upper)=@_;
715: my $key = $lower.'_'.$upper;
716: if (exists($memoizer{$key})) {
717: return $memoizer{$key};
718: }
719: $upper = $lower if (! defined($upper));
720: #
721: my ($la,$ld) = ($lower=~/([A-Za-z]|\*)(\d+|\*)/);
722: my ($ua,$ud) = ($upper=~/([A-Za-z]|\*)(\d+|\*)/);
723: #
724: my $alpha='';
725: my $num='';
726: #
727: if (($la eq '*') || ($ua eq '*')) {
728: $alpha='[A-Za-z]';
729: } else {
730: if (($la=~/[A-Z]/) && ($ua=~/[A-Z]/) ||
731: ($la=~/[a-z]/) && ($ua=~/[a-z]/)) {
732: $alpha='['.$la.'-'.$ua.']';
733: } else {
734: $alpha='['.$la.'-Za-'.$ua.']';
735: }
736: }
737: if (($ld eq '*') || ($ud eq '*')) {
738: $num='\d+';
739: } else {
740: if (length($ld)!=length($ud)) {
741: $num.='(';
742: foreach ($ld=~m/\d/g) {
743: $num.='['.$_.'-9]';
744: }
745: if (length($ud)-length($ld)>1) {
746: $num.='|\d{'.(length($ld)+1).','.(length($ud)-1).'}';
747: }
748: $num.='|';
749: foreach ($ud=~m/\d/g) {
750: $num.='[0-'.$_.']';
751: }
752: $num.=')';
753: } else {
754: my @lda=($ld=~m/\d/g);
755: my @uda=($ud=~m/\d/g);
756: my $i;
757: my $j=0;
758: my $notdone=1;
759: for ($i=0;($i<=$#lda)&&($notdone);$i++) {
760: if ($lda[$i]==$uda[$i]) {
761: $num.=$lda[$i];
762: $j=$i;
763: } else {
764: $notdone=0;
765: }
766: }
767: if ($j<$#lda-1) {
768: $num.='('.$lda[$j+1];
769: for ($i=$j+2;$i<=$#lda;$i++) {
770: $num.='['.$lda[$i].'-9]';
771: }
772: if ($uda[$j+1]-$lda[$j+1]>1) {
773: $num.='|['.($lda[$j+1]+1).'-'.($uda[$j+1]-1).']\d{'.
774: ($#lda-$j-1).'}';
775: }
776: $num.='|'.$uda[$j+1];
777: for ($i=$j+2;$i<=$#uda;$i++) {
778: $num.='[0-'.$uda[$i].']';
779: }
780: $num.=')';
781: } else {
782: if ($lda[-1]!=$uda[-1]) {
783: $num.='['.$lda[-1].'-'.$uda[-1].']';
784: }
785: }
786: }
787: }
788: my $expression ='^'.$alpha.$num."\$";
789: $memoizer{$key} = $expression;
790: return $expression;
791: }
792:
793: }
794:
795: ##
796: ## sub add_hash_to_safe {} # spreadsheet, would like to destroy
797: ##
798:
799: #
800: # expandnamed used to reside in the safe space
801: #
802: sub expandnamed {
803: my $self = shift;
804: my $expression=shift;
805: if ($expression=~/^\&/) {
806: my ($func,$var,$formula)=($expression=~/^\&(\w+)\(([^\;]+)\;(.*)\)/);
807: my @vars=split(/\W+/,$formula);
808: my %values=();
809: foreach my $varname ( @vars ) {
810: if ($varname=~/^(parameter|stores|timestamp)/) {
811: $formula=~s/$varname/'$c{\''.$varname.'\'}'/ge;
812: $varname=~s/$var/\([\\w:\\- ]\+\)/g;
813: foreach (keys(%{$self->{'constants'}})) {
814: if ($_=~/$varname/) {
815: $values{$1}=1;
816: }
817: }
818: }
819: }
820: if ($func eq 'EXPANDSUM') {
821: my $result='';
822: foreach (keys(%values)) {
823: my $thissum=$formula;
824: $thissum=~s/$var/$_/g;
825: $result.=$thissum.'+';
826: }
827: $result=~s/\+$//;
828: return $result;
829: } else {
830: return 0;
831: }
832: } else {
833: # it is not a function, so it is a parameter name
834: # We should do the following:
835: # 1. Take the list of parameter names
836: # 2. look through the list for ones that match the parameter we want
837: # 3. If there are no collisions, return the one that matches
838: # 4. If there is a collision, return 'bad parameter name error'
839: my $returnvalue = '';
840: my @matches = ();
841: my @values = ();
842: $#matches = -1;
843: study $expression;
844: while (my($parameter,$value) = each(%{$self->{'constants'}})) {
845: next if ($parameter !~ /$expression/);
846: push(@matches,$parameter);
847: push(@values,$value);
848: }
849: if (scalar(@matches) == 0) {
850: $returnvalue = '""';#'"unmatched parameter: '.$parameter.'"';
851: } elsif (scalar(@matches) == 1) {
852: # why do we not do this lookup here, instead of delaying it?
853: $returnvalue = $values[0];
854: } elsif (scalar(@matches) > 0) {
855: # more than one match. Look for a concise one
856: $returnvalue = "'non-unique parameter name : $expression'";
857: for (my $i=0; $i<=$#matches;$i++) {
858: if ($matches[$i] =~ /^$expression$/) {
859: # why do we not do this lookup here?
860: $returnvalue = $values[$i];
861: }
862: }
863: } else {
864: # There was a negative number of matches, which indicates
865: # something is wrong with reality. Better warn the user.
866: $returnvalue = '"bizzare parameter: '.$expression.'"';
867: }
868: return $returnvalue;
869: }
870: }
871:
872: sub sett {
873: my $self = shift;
874: my %t=();
875: #
876: # Deal with the template row
877: foreach my $col ($self->template_cells()) {
878: next if ($col=~/^[A-Z]/);
879: foreach my $row ($self->rows()) {
880: # Get the name of this cell
881: my $cell=$col.$row;
882: # Grab the template declaration
883: $t{$cell}=$self->formula('template_'.$col);
884: # Replace '#' with the row number
885: $t{$cell}=~s/\#/$row/g;
886: # Replace '....' with ','
887: $t{$cell}=~s/\.\.+/\,/g;
888: # Replace 'A0' with the value from 'A0'
889: $t{$cell}=~s/(^|[^\"\'])([A-Za-z]\d+)/$1\$sheet_values\{\'$2\'\}/g;
890: # Replace parameters
891: $t{$cell}=~s/(^|[^\"\'])\[([^\]]+)\]/$1.$self->expandnamed($2)/ge;
892: }
893: }
894: #
895: # Deal with the normal cells
896: while (my($cell,$formula) = each(%{$self->{'formulas'}})) {
897: next if ($_=~/^template\_/);
898: my ($col,$row) = ($cell =~ /^([A-z])(\d+)$/);
899: if ($row eq '0') {
900: $t{$cell}=$formula;
901: $t{$cell}=~s/\.\.+/\,/g;
902: $t{$cell}=~s/(^|[^\"\'])([A-Za-z]\d+)/$1\$sheet_values\{\'$2\'\}/g;
903: $t{$cell}=~s/(^|[^\"\'])\[([^\]]+)\]/$1.$self->expandnamed($2)/ge;
904: } elsif ( $col =~ /^[A-Z]$/ ) {
905: if ($formula !~ /^\!/ && exists($self->{'constants'}->{$cell})) {
906: my $data = $self->{'constants'}->{$cell};
907: $t{$cell} = $data;
908: }
909: } else { # $row > 1 and $col =~ /[a-z]
910: $t{$cell}=$formula;
911: $t{$cell}=~s/\.\.+/\,/g;
912: $t{$cell}=~s/(^|[^\"\'])([A-Za-z]\d+)/$1\$sheet_values\{\'$2\'\}/g;
913: $t{$cell}=~s/(^|[^\"\'])\[([^\]]+)\]/$1.$self->expandnamed($2)/ge;
914: }
915: }
916: %{$self->{'safe'}->varglob('t')}=%t;
917: }
918:
919: ##
920: ## sync_safe_space: Called by calcsheet to make sure all the data we
921: # need to calculate is placed into the safe space
922: ##
923: sub sync_safe_space {
924: my $self = shift;
925: # Inside the safe space 'formulas' has a diabolical alter-ego named 'f'.
926: %{$self->{'safe'}->varglob('f')}=%{$self->{'formulas'}};
927: # 'constants' leads a peaceful hidden life of 'c'.
928: %{$self->{'safe'}->varglob('c')}=%{$self->{'constants'}};
929: # 'othersheets' hides as 'os', a disguise few can penetrate.
930: @{$self->{'safe'}->varglob('os')}=@{$self->{'othersheets'}};
931: }
932:
933: ##
934: ## Retrieve the error log from the safe space (used for debugging)
935: ##
936: sub get_errorlog {
937: my $self = shift;
938: $self->{'errorlog'} = $ { $self->{'safe'}->varglob('errorlog') };
939: return $self->{'errorlog'};
940: }
941:
942: ##
943: ## Clear the error log inside the safe space
944: ##
945: sub clear_errorlog {
946: my $self = shift;
947: $ {$self->{'safe'}->varglob('errorlog')} = '';
948: $self->{'errorlog'} = '';
949: }
950:
951: ##
952: ## constants: either set or get the constants
953: ##
954: sub constants {
955: my $self=shift;
956: my ($constants) = @_;
957: if (defined($constants)) {
958: if (! ref($constants)) {
959: my %tmp = @_;
960: $constants = \%tmp;
961: }
962: $self->{'constants'} = $constants;
963: return;
964: } else {
965: return %{$self->{'constants'}};
966: }
967: }
968:
969: ##
970: ## formulas: either set or get the formulas
971: ##
972: sub formulas {
973: my $self=shift;
974: my ($formulas) = @_;
975: if (defined($formulas)) {
976: if (! ref($formulas)) {
977: my %tmp = @_;
978: $formulas = \%tmp;
979: }
980: $self->{'formulas'} = $formulas;
981: $self->{'rows'} = [];
982: $self->{'template_cells'} = [];
983: return;
984: } else {
985: return %{$self->{'formulas'}};
986: }
987: }
988:
989: sub set_formula {
990: my $self = shift;
991: my ($cell,$formula) = @_;
992: $self->{'formulas'}->{$cell}=$formula;
993: return;
994: }
995:
996: ##
997: ## formulas_keys: Return the keys to the formulas hash.
998: ##
999: sub formulas_keys {
1000: my $self = shift;
1001: my @keys = keys(%{$self->{'formulas'}});
1002: return keys(%{$self->{'formulas'}});
1003: }
1004:
1005: ##
1006: ## formula: Return the formula for a given cell in the spreadsheet
1007: ## returns '' if the cell does not have a formula or does not exist
1008: ##
1009: sub formula {
1010: my $self = shift;
1011: my $cell = shift;
1012: if (defined($cell) && exists($self->{'formulas'}->{$cell})) {
1013: return $self->{'formulas'}->{$cell};
1014: }
1015: return '';
1016: }
1017:
1018: ##
1019: ## logthis: write the input to lonnet.log
1020: ##
1021: sub logthis {
1022: my $self = shift;
1023: my $message = shift;
1024: &Apache::lonnet::logthis($self->{'type'}.':'.
1025: $self->{'name'}.':'.$self->{'domain'}.':'.
1026: $message);
1027: return;
1028: }
1029:
1030: ##
1031: ## dump_formulas_to_log: makes lonnet.log huge...
1032: ##
1033: sub dump_formulas_to_log {
1034: my $self =shift;
1035: $self->logthis("Spreadsheet formulas");
1036: $self->logthis("--------------------------------------------------------");
1037: while (my ($cell, $formula) = each(%{$self->{'formulas'}})) {
1038: $self->logthis(' '.$cell.' = '.$formula);
1039: }
1040: $self->logthis("--------------------------------------------------------");}
1041:
1042: ##
1043: ## value: returns the computed value of a particular cell
1044: ##
1045: sub value {
1046: my $self = shift;
1047: my $cell = shift;
1048: if (defined($cell) && exists($self->{'values'}->{$cell})) {
1049: return $self->{'values'}->{$cell};
1050: }
1051: return '';
1052: }
1053:
1054: ##
1055: ## dump_values_to_log: makes lonnet.log huge...
1056: ##
1057: sub dump_values_to_log {
1058: my $self =shift;
1059: $self->logthis("Spreadsheet Values");
1060: $self->logthis("------------------------------------------------------");
1061: while (my ($cell, $value) = each(%{$self->{'values'}})) {
1062: $self->logthis(' '.$cell.' = '.$value);
1063: }
1064: $self->logthis("------------------------------------------------------");
1065: }
1066:
1067: ##
1068: ## Yet another debugging function
1069: ##
1070: sub dump_hash_to_log {
1071: my $self= shift();
1072: my %tmp = @_;
1073: if (@_<2) {
1074: %tmp = %{$_[0]};
1075: }
1076: $self->logthis('---------------------------- (begin hash dump)');
1077: while (my ($key,$val) = each (%tmp)) {
1078: $self->logthis(' '.$key.' = '.$val.':');
1079: }
1080: $self->logthis('---------------------------- (finished hash dump)');
1081: }
1082:
1083: ##
1084: ## rebuild_stats: rebuilds the rows and template_cells arrays
1085: ##
1086: sub rebuild_stats {
1087: my $self = shift;
1088: $self->{'rows'}=[];
1089: $self->{'template_cells'}=[];
1090: while (my ($cell,$formula) = each(%{$self->{'formulas'}})) {
1091: push(@{$self->{'rows'}},$1) if ($cell =~ /^A(\d+)/ && $1 != 0);
1092: push(@{$self->{'template_cells'}},$1) if ($cell =~ /^template_(\w+)/);
1093: }
1094: return;
1095: }
1096:
1097: ##
1098: ## template_cells returns a list of the cells defined in the template row
1099: ##
1100: sub template_cells {
1101: my $self = shift;
1102: $self->rebuild_stats() if (! defined($self->{'template_cells'}) ||
1103: ! @{$self->{'template_cells'}});
1104: return @{$self->{'template_cells'}};
1105: }
1106:
1107: ##
1108: ## Sigh....
1109: ##
1110: sub setothersheets {
1111: my $self = shift;
1112: my @othersheets = @_;
1113: $self->{'othersheets'} = \@othersheets;
1114: }
1115:
1116: ##
1117: ## rows returns a list of the names of cells defined in the A column
1118: ##
1119: sub rows {
1120: my $self = shift;
1121: $self->rebuild_stats() if (!@{$self->{'rows'}});
1122: return @{$self->{'rows'}};
1123: }
1124:
1125: #
1126: # calcsheet: makes all the calls to compute the spreadsheet.
1127: #
1128: sub calcsheet {
1129: my $self = shift;
1130: $self->sync_safe_space();
1131: $self->clear_errorlog();
1132: $self->sett();
1133: my $result = $self->{'safe'}->reval('&calc();');
1134: # $self->logthis($self->get_errorlog());
1135: %{$self->{'values'}} = %{$self->{'safe'}->varglob('sheet_values')};
1136: # $self->logthis($self->get_errorlog());
1137: return $result;
1138: }
1139:
1140: ###########################################################
1141: ##
1142: ## Output Helpers
1143: ##
1144: ###########################################################
1145: sub display {
1146: my $self = shift;
1147: my ($r) = @_;
1148: $self->compute($r);
1149: my $outputmode = 'html';
1150: if ($ENV{'form.output_format'} =~ /^(html|excel|csv)$/) {
1151: $outputmode = $ENV{'form.output_format'};
1152: }
1153: if ($outputmode eq 'html') {
1154: $self->outsheet_html($r);
1155: } elsif ($outputmode eq 'excel') {
1156: $self->outsheet_excel($r);
1157: } elsif ($outputmode eq 'csv') {
1158: $self->outsheet_csv($r);
1159: }
1160: $self->cleanup();
1161: return;
1162: }
1163:
1164: ############################################
1165: ## HTML output routines ##
1166: ############################################
1167: sub html_export_row {
1168: my $self = shift();
1169: my ($color) = @_;
1170: $color = '#CCCCFF' if (! defined($color));
1171: my $allowed = &Apache::lonnet::allowed('mgr',$ENV{'request.course.id'});
1172: my $row_html;
1173: my @rowdata = $self->get_row(0);
1174: foreach my $cell (@rowdata) {
1175: if ($cell->{'name'} =~ /^[A-Z]/) {
1176: $row_html .= '<td bgcolor="'.$color.'">'.
1177: &html_editable_cell($cell,$color,$allowed).'</td>';
1178: } else {
1179: $row_html .= '<td bgcolor="#DDCCFF">'.
1180: &html_editable_cell($cell,'#DDCCFF',$allowed).'</td>';
1181: }
1182: }
1183: return $row_html;
1184: }
1185:
1186: sub html_template_row {
1187: my $self = shift();
1188: my $allowed = &Apache::lonnet::allowed('mgr',$ENV{'request.course.id'});
1189: my ($num_uneditable,$importcolor) = @_;
1190: my $row_html;
1191: my @rowdata = $self->get_template_row();
1192: my $count = 0;
1193: for (my $i = 0; $i<=$#rowdata; $i++) {
1194: my $cell = $rowdata[$i];
1195: if ($i < $num_uneditable) {
1196: $row_html .= '<td bgcolor="'.$importcolor.'">'.
1197: &html_uneditable_cell($cell,'#FFDDDD',$allowed).'</td>';
1198: } else {
1199: $row_html .= '<td bgcolor="#EOFFDD">'.
1200: &html_editable_cell($cell,'#EOFFDD',$allowed).'</td>';
1201: }
1202: }
1203: return $row_html;
1204: }
1205:
1206: sub html_editable_cell {
1207: my ($cell,$bgcolor,$allowed) = @_;
1208: my $result;
1209: my ($name,$formula,$value);
1210: if (defined($cell)) {
1211: $name = $cell->{'name'};
1212: $formula = $cell->{'formula'};
1213: $value = $cell->{'value'};
1214: }
1215: $name = '' if (! defined($name));
1216: $formula = '' if (! defined($formula));
1217: if (! defined($value)) {
1218: $value = '<font color="'.$bgcolor.'">#</font>';
1219: if ($formula ne '') {
1220: $value = '<i>undefined value</i>';
1221: }
1222: } elsif ($value =~ /^\s*$/ ) {
1223: $value = '<font color="'.$bgcolor.'">#</font>';
1224: } else {
1225: $value = &HTML::Entities::encode($value) if ($value !~/ /);
1226: }
1227: return $value if (! $allowed);
1228: #
1229: # The formula will be parsed by the browser twice before being
1230: # displayed to the user for editing.
1231: #
1232: # The encoding string "^A-blah" is placed in []'s inside a regexp, so
1233: # we specify the characters we want left alone by putting a '^' in front.
1234: $formula = &HTML::Entities::encode($formula,'^A-z0-9 !#$%-;=?~');
1235: # HTML::Entities::encode does not catch everything - we need '\' encoded
1236: $formula =~ s/\\/&\#092/g;
1237: # Escape it again - this time the only encodable character is '&'
1238: $formula =~ s/\&/\&/g;
1239: # Glue everything together
1240: $result .= "<a href=\"javascript:celledit(\'".
1241: $name."','".$formula."');\">".$value."</a>";
1242: return $result;
1243: }
1244:
1245: sub html_uneditable_cell {
1246: my ($cell,$bgcolor) = @_;
1247: my $value = (defined($cell) ? $cell->{'value'} : '');
1248: $value = &HTML::Entities::encode($value) if ($value !~/ /);
1249: return ' '.$value.' ';
1250: }
1251:
1252: sub html_row {
1253: my $self = shift();
1254: my ($num_uneditable,$row,$exportcolor,$importcolor) = @_;
1255: my $allowed = &Apache::lonnet::allowed('mgr',$ENV{'request.course.id'});
1256: my @rowdata = $self->get_row($row);
1257: my $num_cols_output = 0;
1258: my $row_html;
1259: my $color = $importcolor;
1260: if ($row == 0) {
1261: $color = $exportcolor;
1262: }
1263: $color = '#FFDDDD' if (! defined($color));
1264: foreach my $cell (@rowdata) {
1265: if ($num_cols_output++ < $num_uneditable) {
1266: $row_html .= '<td bgcolor="'.$color.'">';
1267: $row_html .= &html_uneditable_cell($cell,'#FFDDDD');
1268: } else {
1269: $row_html .= '<td bgcolor="#EOFFDD">';
1270: $row_html .= &html_editable_cell($cell,'#E0FFDD',$allowed);
1271: }
1272: $row_html .= '</td>';
1273: }
1274: return $row_html;
1275: }
1276:
1277: sub html_header {
1278: my $self = shift;
1279: return '' if (! $ENV{'request.role.adv'});
1280: return "<table>\n".
1281: '<tr><th align="center">Output Format</th><tr>'."\n".
1282: '<tr><td>'.&output_selector()."</td></tr>\n".
1283: "</table>\n";
1284: }
1285:
1286: sub output_selector {
1287: my $output_selector = '<select name="output_format" size="3">'."\n";
1288: my $default = 'html';
1289: if (exists($ENV{'form.output_format'})) {
1290: $default = $ENV{'form.output_format'}
1291: } else {
1292: $ENV{'form.output_format'} = $default;
1293: }
1294: foreach (['html','HTML'],
1295: ['excel','Excel'],
1296: ['csv','Comma Seperated Values']) {
1297: my ($name,$description) = @{$_};
1298: $output_selector.=qq{<option value="$name"};
1299: if ($name eq $default) {
1300: $output_selector .= ' selected';
1301: }
1302: $output_selector .= ">$description</option>\n";
1303: }
1304: $output_selector .= "</select>\n";
1305: return $output_selector;
1306: }
1307:
1308: ################################################
1309: ## Excel output routines ##
1310: ################################################
1311: sub excel_output_row {
1312: my $self = shift;
1313: my ($worksheet,$rownum,$rows_output,@prepend) = @_;
1314: my $cols_output = 0;
1315: #
1316: my @rowdata = $self->get_row($rownum);
1317: foreach my $cell (@prepend,@rowdata) {
1318: my $value = $cell;
1319: $value = $cell->{'value'} if (ref($value));
1320: $value =~ s/\ / /gi;
1321: $worksheet->write($rows_output,$cols_output++,$value);
1322: }
1323: return;
1324: }
1325:
1326: sub create_excel_spreadsheet {
1327: my $self = shift;
1328: my ($r) = @_;
1329: my $filename = '/prtspool/'.
1330: $ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'.
1331: time.'_'.rand(1000000000).'.xls';
1332: my $workbook = Spreadsheet::WriteExcel->new('/home/httpd'.$filename);
1333: if (! defined($workbook)) {
1334: $r->log_error("Error creating excel spreadsheet $filename: $!");
1335: $r->print("Problems creating new Excel file. ".
1336: "This error has been logged. ".
1337: "Please alert your LON-CAPA administrator");
1338: return undef;
1339: }
1340: #
1341: # The excel spreadsheet stores temporary data in files, then put them
1342: # together. If needed we should be able to disable this (memory only).
1343: # The temporary directory must be specified before calling 'addworksheet'.
1344: # File::Temp is used to determine the temporary directory.
1345: $workbook->set_tempdir('/home/httpd/perl/tmp');
1346: #
1347: # Determine the name to give the worksheet
1348: return ($workbook,$filename);
1349: }
1350:
1351: sub outsheet_excel {
1352: my $self = shift;
1353: my ($r) = @_;
1354: my $connection = $r->connection();
1355: $r->print("<h2>Preparing Excel Spreadsheet</h2>");
1356: #
1357: # Create excel worksheet
1358: my ($workbook,$filename) = $self->create_excel_spreadsheet($r);
1359: return if (! defined($workbook));
1360: #
1361: # Create main worksheet
1362: my $worksheet = $workbook->addworksheet('main');
1363: my $rows_output = 0;
1364: my $cols_output = 0;
1365: #
1366: # Write excel header
1367: foreach my $value ($self->get_title()) {
1368: $cols_output = 0;
1369: $worksheet->write($rows_output++,$cols_output,$value);
1370: }
1371: $rows_output++; # skip a line
1372: #
1373: # Write summary/export row
1374: $cols_output = 0;
1375: $self->excel_output_row($worksheet,0,$rows_output++,'Summary');
1376: $rows_output++; # skip a line
1377: #
1378: $self->excel_rows($connection,$worksheet,$cols_output,$rows_output);
1379: #
1380: #
1381: # Close the excel file
1382: $workbook->close();
1383: #
1384: # Write a link to allow them to download it
1385: $r->print('<br />'.
1386: '<a href="'.$filename.'">Your Excel spreadsheet.</a>'."\n");
1387: return;
1388: }
1389:
1390: #################################
1391: ## CSV output routines ##
1392: #################################
1393: sub outsheet_csv {
1394: my $self = shift;
1395: my ($r) = @_;
1396: my $connection = $r->connection();
1397: my $csvdata = '';
1398: my @Values;
1399: #
1400: # Open the csv file
1401: my $filename = '/prtspool/'.
1402: $ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'.
1403: time.'_'.rand(1000000000).'.csv';
1404: my $file;
1405: unless ($file = Apache::File->new('>'.'/home/httpd'.$filename)) {
1406: $r->log_error("Couldn't open $filename for output $!");
1407: $r->print("Problems occured in writing the csv file. ".
1408: "This error has been logged. ".
1409: "Please alert your LON-CAPA administrator.");
1410: $r->print("<pre>\n".$csvdata."</pre>\n");
1411: return 0;
1412: }
1413: #
1414: # Output the title information
1415: foreach my $value ($self->get_title()) {
1416: print $file "'".&Apache::loncommon::csv_translate($value)."'\n";
1417: }
1418: #
1419: # Output the body of the spreadsheet
1420: $self->csv_rows($connection,$file);
1421: #
1422: # Close the csv file
1423: close($file);
1424: $r->print('<br /><br />'.
1425: '<a href="'.$filename.'">Your CSV spreadsheet.</a>'."\n");
1426: #
1427: return 1;
1428: }
1429:
1430: sub csv_output_row {
1431: my $self = shift;
1432: my ($filehandle,$rownum,@prepend) = @_;
1433: #
1434: my @rowdata = ();
1435: if (defined($rownum)) {
1436: @rowdata = $self->get_row($rownum);
1437: }
1438: my @output = ();
1439: foreach my $cell (@prepend,@rowdata) {
1440: my $value = $cell;
1441: $value = $cell->{'value'} if (ref($value));
1442: $value =~ s/\ / /gi;
1443: $value = "'".$value."'";
1444: push (@output,$value);
1445: }
1446: print $filehandle join(',',@output )."\n";
1447: return;
1448: }
1449:
1450: ############################################
1451: ## XML output routines ##
1452: ############################################
1453: sub outsheet_xml {
1454: my $self = shift;
1455: my ($r) = @_;
1456: ## Someday XML
1457: ## Will be rendered for the user
1458: ## But not on this day
1459: my $Str = '<spreadsheet type="'.$self->{'type'}.'">'."\n";
1460: while (my ($cell,$formula) = each(%{$self->{'formulas'}})) {
1461: if ($cell =~ /^template_(\d+)/) {
1462: my $col = $1;
1463: $Str .= '<template col="'.$col.'">'.$formula.'</template>'."\n";
1464: } else {
1465: my ($row,$col) = ($cell =~ /^([A-z])(\d+)/);
1466: next if (! defined($row) || ! defined($col));
1467: $Str .= '<field row="'.$row.'" col="'.$col.'" >'.$formula.'</cell>'
1468: ."\n";
1469: }
1470: }
1471: $Str.="</spreadsheet>";
1472: return $Str;
1473: }
1474:
1475: ############################################
1476: ### Filesystem routines ###
1477: ############################################
1478: sub parse_sheet {
1479: # $sheetxml is a scalar reference or a scalar
1480: my ($sheetxml) = @_;
1481: if (! ref($sheetxml)) {
1482: my $tmp = $sheetxml;
1483: $sheetxml = \$tmp;
1484: }
1485: my %formulas;
1486: my %sources;
1487: my $parser=HTML::TokeParser->new($sheetxml);
1488: my $token;
1489: while ($token=$parser->get_token) {
1490: if ($token->[0] eq 'S') {
1491: if ($token->[1] eq 'field') {
1492: my $cell = $token->[2]->{'col'}.$token->[2]->{'row'};
1493: my $source = $token->[2]->{'source'};
1494: my $formula = $parser->get_text('/field');
1495: $formulas{$cell} = $formula;
1496: $sources{$cell} = $source if (defined($source));
1497: $parser->get_text('/field');
1498: }
1499: if ($token->[1] eq 'template') {
1500: $formulas{'template_'.$token->[2]->{'col'}}=
1501: $parser->get_text('/template');
1502: }
1503: }
1504: }
1505: return (\%formulas,\%sources);
1506: }
1507:
1508: {
1509:
1510: my %spreadsheets;
1511:
1512: sub clear_spreadsheet_definition_cache {
1513: undef(%spreadsheets);
1514: }
1515:
1516: sub load_system_default_sheet {
1517: my $self = shift;
1518: my $includedir = $Apache::lonnet::perlvar{'lonIncludes'};
1519: # load in the default defined spreadsheet
1520: my $sheetxml='';
1521: my $fh;
1522: if ($fh=Apache::File->new($includedir.'/default_'.$self->{'type'})) {
1523: $sheetxml=join('',<$fh>);
1524: $fh->close();
1525: } else {
1526: # $sheetxml='<field row="0" col="A">"Error"</field>';
1527: $sheetxml='<field row="0" col="A"></field>';
1528: }
1529: $self->filename('default_');
1530: my ($formulas,undef) = &parse_sheet(\$sheetxml);
1531: return $formulas;
1532: }
1533:
1534: sub load {
1535: my $self = shift;
1536: #
1537: my $stype = $self->{'type'};
1538: my $cnum = $self->{'cnum'};
1539: my $cdom = $self->{'cdom'};
1540: my $chome = $self->{'chome'};
1541: #
1542: my $filename = $self->filename();
1543: my $cachekey = join('_',($cnum,$cdom,$stype,$filename));
1544: #
1545: # see if sheet is cached
1546: my ($formulas);
1547: if (exists($spreadsheets{$cachekey})) {
1548: $formulas = $spreadsheets{$cachekey}->{'formulas'};
1549: } else {
1550: # Not cached, need to read
1551: if (! defined($filename)) {
1552: $formulas = $self->load_system_default_sheet();
1553: } elsif($self->filename() =~ /^\/res\/.*\.spreadsheet$/) {
1554: # Load a spreadsheet definition file
1555: my $sheetxml=&Apache::lonnet::getfile
1556: (&Apache::lonnet::filelocation('',$filename));
1557: if ($sheetxml == -1) {
1558: $sheetxml='<field row="0" col="A">"Error loading spreadsheet '
1559: .$self->filename().'"</field>';
1560: }
1561: ($formulas,undef) = &parse_sheet(\$sheetxml);
1562: # Get just the filename and set the sheets filename
1563: my ($newfilename) = ($filename =~ /\/([^\/]*)\.spreadsheet$/);
1564: if ($self->is_default()) {
1565: $self->filename($newfilename);
1566: $self->make_default();
1567: } else {
1568: $self->filename($newfilename);
1569: }
1570: } else {
1571: # Load the spreadsheet definition file from the save file
1572: my %tmphash = &Apache::lonnet::dump($filename,$cdom,$cnum);
1573: my ($tmp) = keys(%tmphash);
1574: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
1575: while (my ($cell,$formula) = each(%tmphash)) {
1576: $formulas->{$cell}=$formula;
1577: }
1578: } else {
1579: $formulas = $self->load_system_default_sheet();
1580: }
1581: }
1582: $filename=$self->filename(); # filename may have changed
1583: $cachekey = join('_',($cnum,$cdom,$stype,$filename));
1584: %{$spreadsheets{$cachekey}->{'formulas'}} = %{$formulas};
1585: }
1586: $self->formulas($formulas);
1587: $self->set_row_sources();
1588: $self->set_row_numbers();
1589: }
1590:
1591: sub set_row_sources {
1592: my $self = shift;
1593: while (my ($cell,$value) = each(%{$self->{'formulas'}})) {
1594: next if ($cell !~ /^A(\d+)/ || $1 < 1);
1595: my $row = $1;
1596: $self->{'row_source'}->{$row} = $value;
1597: }
1598: return;
1599: }
1600:
1601: sub set_row_numbers {
1602: my $self = shift;
1603: while (my ($cell,$value) = each(%{$self->{'formulas'}})) {
1604: next if ($cell !~ /^A(\d+)$/);
1605: next if (! defined($value));
1606: $self->{'row_numbers'}->{$value} = $1;
1607: $self->{'maxrow'} = $1 if ($1 > $self->{'maxrow'});
1608: }
1609: }
1610:
1611: ##
1612: ## exportrow is *not* used to get the export row from a computed sub-sheet.
1613: ##
1614: sub exportrow {
1615: my $self = shift;
1616: my @exportarray;
1617: foreach my $column (@UC_Columns) {
1618: push(@exportarray,$self->value($column.'0'));
1619: }
1620: return @exportarray;
1621: }
1622:
1623: sub save {
1624: my $self = shift;
1625: my ($makedef)=@_;
1626: my $cid=$self->{'cid'};
1627: # If we are saving it, it must not be temporary
1628: $self->temporary(0);
1629: if (&Apache::lonnet::allowed('opa',$cid)) {
1630: my %f=$self->formulas();
1631: my $stype = $self->{'type'};
1632: my $cnum = $self->{'cnum'};
1633: my $cdom = $self->{'cdom'};
1634: my $chome = $self->{'chome'};
1635: my $filename = $self->{'filename'};
1636: my $cachekey = join('_',($cnum,$cdom,$stype,$filename));
1637: # Cache new sheet
1638: %{$spreadsheets{$cachekey}->{'formulas'}}=%f;
1639: # Write sheet
1640: foreach (keys(%f)) {
1641: delete($f{$_}) if ($f{$_} eq 'import');
1642: }
1643: my $reply = &Apache::lonnet::put($filename,\%f,$cdom,$cnum);
1644: return $reply if ($reply ne 'ok');
1645: $reply = &Apache::lonnet::put($stype.'_spreadsheets',
1646: {$filename => $ENV{'user.name'}.'@'.$ENV{'user.domain'}},
1647: $cdom,$cnum);
1648: return $reply if ($reply ne 'ok');
1649: if ($makedef) {
1650: $reply = &Apache::lonnet::put('environment',
1651: {'spreadsheet_default_'.$stype => $filename },
1652: $cdom,$cnum);
1653: return $reply if ($reply ne 'ok');
1654: }
1655: if ($self->is_default()) {
1656: if ($self->{'type'} eq 'studentcalc') {
1657: &Apache::lonnet::expirespread('','','studentcalc','');
1658: } elsif ($self->{'type'} eq 'assesscalc') {
1659: &Apache::lonnet::expirespread('','','assesscalc','');
1660: &Apache::lonnet::expirespread('','','studentcalc','');
1661: }
1662: }
1663: return $reply;
1664: }
1665: return 'unauthorized';
1666: }
1667:
1668: } # end of scope for %spreadsheets
1669:
1670: sub save_tmp {
1671: my $self = shift;
1672: my $filename=$ENV{'user.name'}.'_'.
1673: $ENV{'user.domain'}.'_spreadsheet_'.$self->{'symb'}.'_'.
1674: $self->{'filename'};
1675: $filename=~s/\W/\_/g;
1676: $filename=$Apache::lonnet::tmpdir.$filename.'.tmp';
1677: $self->temporary(1);
1678: my $fh;
1679: if ($fh=Apache::File->new('>'.$filename)) {
1680: my %f = $self->formulas();
1681: while( my ($cell,$formula) = each(%f)) {
1682: next if ($formula eq 'import');
1683: print $fh &Apache::lonnet::escape($cell)."=".
1684: &Apache::lonnet::escape($formula)."\n";
1685: }
1686: $fh->close();
1687: }
1688: }
1689:
1690: sub load_tmp {
1691: my $self = shift;
1692: my $filename=$ENV{'user.name'}.'_'.
1693: $ENV{'user.domain'}.'_spreadsheet_'.$self->{'symb'}.'_'.
1694: $self->{'filename'};
1695: $filename=~s/\W/\_/g;
1696: $filename=$Apache::lonnet::tmpdir.$filename.'.tmp';
1697: my %formulas = ();
1698: if (my $spreadsheet_file = Apache::File->new($filename)) {
1699: while (<$spreadsheet_file>) {
1700: chomp;
1701: my ($cell,$formula) = split(/=/);
1702: $cell = &Apache::lonnet::unescape($cell);
1703: $formula = &Apache::lonnet::unescape($formula);
1704: $formulas{$cell} = $formula;
1705: }
1706: $spreadsheet_file->close();
1707: }
1708: # flag the sheet as temporary
1709: $self->temporary(1);
1710: $self->formulas(\%formulas);
1711: $self->set_row_sources();
1712: $self->set_row_numbers();
1713: return;
1714: }
1715:
1716: sub temporary {
1717: my $self=shift;
1718: if (@_) {
1719: ($self->{'temporary'})= @_;
1720: }
1721: return $self->{'temporary'};
1722: }
1723:
1724: sub modify_cell {
1725: # studentcalc overrides this
1726: my $self = shift;
1727: my ($cell,$formula) = @_;
1728: if ($cell =~ /([A-z])\-/) {
1729: $cell = 'template_'.$1;
1730: } elsif ($cell !~ /^([A-z](\d+)|template_[A-z])$/) {
1731: return;
1732: }
1733: $self->set_formula($cell,$formula);
1734: $self->rebuild_stats();
1735: return;
1736: }
1737:
1738: ###########################################
1739: # othersheets: Returns the list of other spreadsheets available
1740: ###########################################
1741: sub othersheets {
1742: my $self = shift();
1743: my ($stype) = @_;
1744: $stype = $self->{'type'} if (! defined($stype) || $stype !~ /calc$/);
1745: #
1746: my @alternatives=();
1747: my %results=&Apache::lonnet::dump($stype.'_spreadsheets',
1748: $self->{'cdom'}, $self->{'cnum'});
1749: my ($tmp) = keys(%results);
1750: if ($tmp =~ /^(con_lost|error|no_such_host)/i ) {
1751: @alternatives = ('Default');
1752: } else {
1753: @alternatives = ('Default', sort (keys(%results)));
1754: }
1755: return @alternatives;
1756: }
1757:
1758: sub blackout {
1759: my $self = shift;
1760: $self->{'blackout'} = $_[0] if (@_);
1761: return $self->{'blackout'};
1762: }
1763:
1764: sub get_row {
1765: my $self = shift;
1766: my ($n)=@_;
1767: my @cols=();
1768: foreach my $col (@UC_Columns,@LC_Columns) {
1769: my $cell = $col.$n;
1770: push(@cols,{ name => $cell,
1771: formula => $self->formula($cell),
1772: value => $self->value($cell)});
1773: }
1774: return @cols;
1775: }
1776:
1777: sub get_template_row {
1778: my $self = shift;
1779: my @cols=();
1780: foreach my $col (@UC_Columns,@LC_Columns) {
1781: my $cell = 'template_'.$col;
1782: push(@cols,{ name => $cell,
1783: formula => $self->formula($cell),
1784: value => $self->formula($cell) });
1785: }
1786: return @cols;
1787: }
1788:
1789: sub need_to_save {
1790: my $self = shift;
1791: if ($self->{'new_rows'} && ! $self->temporary()) {
1792: return 1;
1793: }
1794: return 0;
1795: }
1796:
1797: sub get_row_number_from_key {
1798: my $self = shift;
1799: my ($key) = @_;
1800: if (! exists($self->{'row_numbers'}->{$key}) ||
1801: ! defined($self->{'row_numbers'}->{$key})) {
1802: # I used to set $f here to the new value, but the key passed for lookup
1803: # may not be the key we need to save
1804: $self->{'maxrow'}++;
1805: $self->{'row_numbers'}->{$key} = $self->{'maxrow'};
1806: # $self->logthis('added row '.$self->{'row_numbers'}->{$key}.
1807: # ' for '.$key);
1808: $self->{'new_rows'} = 1;
1809: }
1810: return $self->{'row_numbers'}->{$key};
1811: }
1812:
1813: 1;
1814:
1815: __END__
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