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[LON-CAPA] /
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Spreadsheet.pm
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Wed Mar 31 05:24:00 2004 UTC (20 years, 1 month ago) by
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1: #
2: # $Id: Spreadsheet.pm,v 1.37 2004/03/31 05:24:00 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($name) || $name eq '') {
90: $name = $ENV{'user.name'};
91: }
92: if (! defined($domain) || $domain eq '') {
93: $domain = $ENV{'user.domain'};
94: }
95: #
96: my $self = {
97: name => $name,
98: domain => $domain,
99: type => $stype,
100: symb => $usymb,
101: errorlog => '',
102: maxrow => 0,
103: cid => $ENV{'request.course.id'},
104: cnum => $ENV{'course.'.$ENV{'request.course.id'}.'.num'},
105: cdom => $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
106: chome => $ENV{'course.'.$ENV{'request.course.id'}.'.home'},
107: coursedesc => $ENV{'course.'.$ENV{'request.course.id'}.'.description'},
108: coursefilename => $ENV{'request.course.fn'},
109: #
110: # Flags
111: temporary => 0, # true if this sheet has been modified but not saved
112: new_rows => 0, # true if this sheet has new rows
113: #
114: # blackout is used to determine if any data needs to be hidden from the
115: # student.
116: blackout => 0,
117: #
118: # Data storage
119: formulas => {},
120: constants => {},
121: rows => [],
122: row_source => {},
123: othersheets => [],
124: };
125: #
126: $self->{'uhome'} = &Apache::lonnet::homeserver($name,$domain);
127: #
128: bless($self,$class);
129: #
130: # Load in the spreadsheet definition
131: $self->filename($filename);
132: if (exists($ENV{'form.workcopy'}) &&
133: $self->{'type'} eq $ENV{'form.workcopy'}) {
134: $self->load_tmp();
135: } else {
136: $self->load();
137: }
138: return $self;
139: }
140:
141: ######################################################
142:
143: =pod
144:
145: =item &filename
146:
147: get or set the filename for a spreadsheet.
148:
149: =cut
150:
151: ######################################################
152: sub filename {
153: my $self = shift();
154: if (@_) {
155: my ($newfilename) = @_;
156: if (! defined($newfilename) || $newfilename eq 'Default' ||
157: $newfilename !~ /\w/ || $newfilename eq '') {
158: my $key = 'course.'.$self->{'cid'}.'.spreadsheet_default_'.
159: $self->{'type'};
160: if (exists($ENV{$key}) && $ENV{$key} ne '') {
161: $newfilename = $ENV{$key};
162: } else {
163: $newfilename = 'default_'.$self->{'type'};
164: }
165: }
166: if ($newfilename !~ /\w/ || $newfilename =~ /^\W*$/) {
167: $newfilename = 'default_'.$self->{'type'};
168: }
169: if ($newfilename !~ /^default\.$self->{'type'}$/ &&
170: $newfilename !~ /^\/res\/(.*)spreadsheet$/) {
171: if ($newfilename !~ /_$self->{'type'}$/) {
172: $newfilename =~ s/[\s_]*$//;
173: $newfilename .= '_'.$self->{'type'};
174: }
175: }
176: $self->{'filename'} = $newfilename;
177: return;
178: }
179: return $self->{'filename'};
180: }
181:
182: ######################################################
183:
184: =pod
185:
186: =item &make_default()
187:
188: Make the current spreadsheet file the default for the course. Expires all the
189: default spreadsheets.......!
190:
191: =cut
192:
193: ######################################################
194: sub make_default {
195: my $self = shift();
196: my $result = &Apache::lonnet::put('environment',
197: {'spreadsheet_default_'.$self->{'type'} => $self->filename()},
198: $self->{'cdom'},$self->{'cnum'});
199: return $result if ($result ne 'ok');
200: my $symb = $self->{'symb'};
201: $symb = '' if (! defined($symb));
202: &Apache::lonnet::expirespread('','',$self->{'type'},$symb);
203: }
204:
205: ######################################################
206:
207: =pod
208:
209: =item &is_default()
210:
211: Returns 1 if the current spreadsheet is the default as specified in the
212: course environment. Returns 0 otherwise.
213:
214: =cut
215:
216: ######################################################
217: sub is_default {
218: my $self = shift;
219: # Check to find out if we are the default spreadsheet (filenames match)
220: my $default_filename = '';
221: my %tmphash = &Apache::lonnet::get('environment',
222: ['spreadsheet_default_'.
223: $self->{'type'}],
224: $self->{'cdom'},
225: $self->{'cnum'});
226: my ($tmp) = keys(%tmphash);
227: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
228: $default_filename = $tmphash{'spreadsheet_default_'.$self->{'type'}};
229: }
230: if ($default_filename =~ /^\s*$/) {
231: $default_filename = 'default_'.$self->{'type'};
232: }
233: return 1 if ($self->filename() eq $default_filename);
234: return 0;
235: }
236:
237: sub initialize {
238: # This method is here to remind you that it will be overridden by
239: # the descendents of the spreadsheet class.
240: }
241:
242: sub clear_package {
243: # This method is here to remind you that it will be overridden by
244: # the descendents of the spreadsheet class.
245: }
246:
247: sub cleanup {
248: my $self = shift();
249: $self->clear_package();
250: }
251:
252: sub initialize_spreadsheet_package {
253: &load_spreadsheet_expirationdates();
254: &clear_spreadsheet_definition_cache();
255: }
256:
257: sub load_spreadsheet_expirationdates {
258: undef %expiredates;
259: my $cid=$ENV{'request.course.id'};
260: my @tmp = &Apache::lonnet::dump('nohist_expirationdates',
261: $ENV{'course.'.$cid.'.domain'},
262: $ENV{'course.'.$cid.'.num'});
263: if (lc($tmp[0]) !~ /^error/){
264: %expiredates = @tmp;
265: }
266: }
267:
268: sub check_expiration_time {
269: my $self = shift;
270: my ($time)=@_;
271: return 0 if (! defined($time));
272: my ($key1,$key2,$key3,$key4,$key5);
273: # Description of keys
274: #
275: # key1: all sheets of this type have expired
276: # key2: all sheets of this type for this student
277: # key3: all sheets of this type in this map for this student
278: # key4: this assessment sheet for this student
279: # key5: this assessment sheet for all students
280: $key1 = '::'.$self->{'type'}.':';
281: $key2 = $self->{'name'}.':'.$self->{'domain'}.':'.$self->{'type'}.':';
282: $key3 = $key2.$self->{'container'} if (defined($self->{'container'}));
283: $key4 = $key2.$self->{'symb'} if (defined($self->{'symb'}));
284: $key5 = $key1.$self->{'symb'} if (defined($self->{'symb'}));
285: my $returnvalue = 1; # default to okay
286: foreach my $key ($key1,$key2,$key3,$key4,$key5) {
287: next if (! defined($key));
288: if (exists($expiredates{$key}) && $expiredates{$key} > $time) {
289: $returnvalue = 0; # need to recompute
290: }
291: }
292: return $returnvalue;
293: }
294:
295: ######################################################
296:
297: =pod
298:
299: =item &initialize_safe_space
300:
301: Returns the safe space required by a Spreadsheet object.
302:
303: =head 2 Safe Space Functions
304:
305: =over 4
306:
307: =cut
308:
309: ######################################################
310: {
311:
312: my $safeeval;
313:
314: sub initialize_safe_space {
315: my $self = shift;
316: if (! defined($safeeval)) {
317: $safeeval = new Safe(shift);
318: my $safehole = new Safe::Hole;
319: $safeeval->permit("entereval");
320: $safeeval->permit(":base_math");
321: $safeeval->permit("sort");
322: $safeeval->deny(":base_io");
323: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
324: $safehole->wrap(\&mask,$safeeval,'&mask');
325: $safeeval->share('$@');
326: my $code=<<'ENDDEFS';
327: # ---------------------------------------------------- Inside of the safe space
328: #
329: # f: formulas
330: # t: intermediate format (variable references expanded)
331: # v: output values
332: # c: preloaded constants (A-column)
333: # rl: row label
334: # os: other spreadsheets (for student spreadsheet only)
335: undef %sheet_values; # Holds the (computed, final) values for the sheet
336: # This is only written to by &calc, the spreadsheet computation routine.
337: # It is read by many functions
338: undef %t; # Holds the values of the spreadsheet temporarily. Set in &sett,
339: # which does the translation of strings like C5 into the value in C5.
340: # Used in &calc - %t holds the values that are actually eval'd.
341: undef %f; # Holds the formulas for each cell. This is the users
342: # (spreadsheet authors) data for each cell.
343: undef %c; # Holds the constants for a sheet. In the assessment
344: # sheets, this is the A column. Used in &MINPARM, &MAXPARM, &expandnamed,
345: # &sett, and &constants. There is no &getconstants.
346: # &constants is called by &loadstudent, &loadcourse, &load assessment,
347: undef @os; # Holds the names of other spreadsheets - this is used to specify
348: # the spreadsheets that are available for the assessment sheet.
349: # Set by &setothersheets. &setothersheets is called by &handler. A
350: # related subroutine is &othersheets.
351: $errorlog = '';
352: #
353: $maxrow = 0;
354: $type = '';
355: #
356: # filename/reference of the sheet
357: $filename = '';
358: #
359: # user data
360: $name = '';
361: $uhome = '';
362: $domain = '';
363: #
364: # course data
365: $csec = '';
366: $chome= '';
367: $cnum = '';
368: $cdom = '';
369: $cid = '';
370: $coursefilename = '';
371: #
372: # symb
373: $usymb = '';
374: #
375: # error messages
376: $errormsg = '';
377: #
378: #-------------------------------------------------------
379:
380: =pod
381:
382: =item NUM(range)
383:
384: returns the number of items in the range.
385:
386: =cut
387:
388: #-------------------------------------------------------
389: sub NUM {
390: my $mask=&mask(@_);
391: my $num= $#{@{grep(eval("/$mask/"),keys(%sheet_values))}}+1;
392: return $num;
393: }
394:
395: #-------------------------------------------------------
396:
397: =pod
398:
399: =item BIN(low,high,lower,upper)
400:
401: =cut
402:
403: #-------------------------------------------------------
404: sub BIN {
405: my ($low,$high,$lower,$upper)=@_;
406: my $mask=&mask($lower,$upper);
407: my $num=0;
408: foreach (grep eval("/$mask/"),keys(%sheet_values)) {
409: if (($sheet_values{$_}>=$low) && ($sheet_values{$_}<=$high)) {
410: $num++;
411: }
412: }
413: return $num;
414: }
415:
416: #-------------------------------------------------------
417:
418: =pod
419:
420: =item SUM(range)
421:
422: returns the sum of items in the range.
423:
424: =cut
425:
426: #-------------------------------------------------------
427: sub SUM {
428: my $mask=&mask(@_);
429: my $sum=0;
430: foreach (grep eval("/$mask/"),keys(%sheet_values)) {
431: $sum+=$sheet_values{$_};
432: }
433: return $sum;
434: }
435:
436: #-------------------------------------------------------
437:
438: =pod
439:
440: =item MEAN(range)
441:
442: compute the average of the items in the range.
443:
444: =cut
445:
446: #-------------------------------------------------------
447: sub MEAN {
448: my $mask=&mask(@_);
449: my $sum=0;
450: my $num=0;
451: foreach (grep eval("/$mask/"),keys(%sheet_values)) {
452: $sum+=$sheet_values{$_};
453: $num++;
454: }
455: if ($num) {
456: return $sum/$num;
457: } else {
458: return undef;
459: }
460: }
461:
462: #-------------------------------------------------------
463:
464: =pod
465:
466: =item STDDEV(range)
467:
468: compute the standard deviation of the items in the range.
469:
470: =cut
471:
472: #-------------------------------------------------------
473: sub STDDEV {
474: my $mask=&mask(@_);
475: my $sum=0; my $num=0;
476: foreach (grep eval("/$mask/"),keys(%sheet_values)) {
477: $sum+=$sheet_values{$_};
478: $num++;
479: }
480: unless ($num>1) { return undef; }
481: my $mean=$sum/$num;
482: $sum=0;
483: foreach (grep eval("/$mask/"),keys(%sheet_values)) {
484: $sum+=($sheet_values{$_}-$mean)**2;
485: }
486: return sqrt($sum/($num-1));
487: }
488:
489: #-------------------------------------------------------
490:
491: =pod
492:
493: =item PROD(range)
494:
495: compute the product of the items in the range.
496:
497: =cut
498:
499: #-------------------------------------------------------
500: sub PROD {
501: my $mask=&mask(@_);
502: my $prod=1;
503: foreach (grep eval("/$mask/"),keys(%sheet_values)) {
504: $prod*=$sheet_values{$_};
505: }
506: return $prod;
507: }
508:
509: #-------------------------------------------------------
510:
511: =pod
512:
513: =item MAX(range)
514:
515: compute the maximum of the items in the range.
516:
517: =cut
518:
519: #-------------------------------------------------------
520: sub MAX {
521: my $mask=&mask(@_);
522: my $max='-';
523: foreach (grep eval("/$mask/"),keys(%sheet_values)) {
524: unless ($max) { $max=$sheet_values{$_}; }
525: if (($sheet_values{$_}>$max) || ($max eq '-')) {
526: $max=$sheet_values{$_};
527: }
528: }
529: return $max;
530: }
531:
532: #-------------------------------------------------------
533:
534: =pod
535:
536: =item MIN(range)
537:
538: compute the minimum of the items in the range.
539:
540: =cut
541:
542: #-------------------------------------------------------
543: sub MIN {
544: my $mask=&mask(@_);
545: my $min='-';
546: foreach (grep eval("/$mask/"),keys(%sheet_values)) {
547: unless ($max) { $max=$sheet_values{$_}; }
548: if (($sheet_values{$_}<$min) || ($min eq '-')) {
549: $min=$sheet_values{$_};
550: }
551: }
552: return $min;
553: }
554:
555: #-------------------------------------------------------
556:
557: =pod
558:
559: =item SUMMAX(num,lower,upper)
560:
561: compute the sum of the largest 'num' items in the range from
562: 'lower' to 'upper'
563:
564: =cut
565:
566: #-------------------------------------------------------
567: sub SUMMAX {
568: my ($num,$lower,$upper)=@_;
569: my $mask=&mask($lower,$upper);
570: my @inside=();
571: foreach (grep eval("/$mask/"),keys(%sheet_values)) {
572: push (@inside,$sheet_values{$_});
573: }
574: @inside=sort(@inside);
575: my $sum=0; my $i;
576: for ($i=$#inside;(($i>$#inside-$num) && ($i>=0));$i--) {
577: $sum+=$inside[$i];
578: }
579: return $sum;
580: }
581:
582: #-------------------------------------------------------
583:
584: =pod
585:
586: =item SUMMIN(num,lower,upper)
587:
588: compute the sum of the smallest 'num' items in the range from
589: 'lower' to 'upper'
590:
591: =cut
592:
593: #-------------------------------------------------------
594: sub SUMMIN {
595: my ($num,$lower,$upper)=@_;
596: my $mask=&mask($lower,$upper);
597: my @inside=();
598: foreach (grep eval("/$mask/"),keys(%sheet_values)) {
599: $inside[$#inside+1]=$sheet_values{$_};
600: }
601: @inside=sort(@inside);
602: my $sum=0; my $i;
603: for ($i=0;(($i<$num) && ($i<=$#inside));$i++) {
604: $sum+=$inside[$i];
605: }
606: return $sum;
607: }
608:
609: #-------------------------------------------------------
610:
611: =pod
612:
613: =item MINPARM(parametername)
614:
615: Returns the minimum value of the parameters matching the parametername.
616: parametername should be a string such as 'duedate'.
617:
618: =cut
619:
620: #-------------------------------------------------------
621: sub MINPARM {
622: my ($expression) = @_;
623: my $min = undef;
624: foreach $parameter (keys(%c)) {
625: next if ($parameter !~ /$expression/);
626: if ((! defined($min)) || ($min > $c{$parameter})) {
627: $min = $c{$parameter}
628: }
629: }
630: return $min;
631: }
632:
633: #-------------------------------------------------------
634:
635: =pod
636:
637: =item MAXPARM(parametername)
638:
639: Returns the maximum value of the parameters matching the input parameter name.
640: parametername should be a string such as 'duedate'.
641:
642: =cut
643:
644: #-------------------------------------------------------
645: sub MAXPARM {
646: my ($expression) = @_;
647: my $max = undef;
648: foreach $parameter (keys(%c)) {
649: next if ($parameter !~ /$expression/);
650: if ((! defined($min)) || ($max < $c{$parameter})) {
651: $max = $c{$parameter}
652: }
653: }
654: return $max;
655: }
656:
657:
658: sub calc {
659: %sheet_values = %t;
660: my $notfinished = 1;
661: my $lastcalc = '';
662: my $depth = 0;
663: while ($notfinished) {
664: $notfinished=0;
665: while (my ($cell,$value) = each(%t)) {
666: my $old=$sheet_values{$cell};
667: $sheet_values{$cell}=eval $value;
668: # $errorlog .= $cell.' = '.$old.'->'.$sheet_values{$cell}."\n";
669: if ($@) {
670: undef %sheet_values;
671: return $cell.': '.$@;
672: }
673: if ($sheet_values{$cell} ne $old) {
674: $notfinished=1;
675: $lastcalc=$cell;
676: }
677: }
678: # $errorlog.="------------------------------------------------";
679:
680: $depth++;
681: if ($depth>100) {
682: undef %sheet_values;
683: return $lastcalc.': Maximum calculation depth exceeded';
684: }
685: }
686: return 'okay';
687: }
688:
689: # ------------------------------------------- End of "Inside of the safe space"
690: ENDDEFS
691: $safeeval->reval($code);
692: }
693: $self->{'safe'} = $safeeval;
694: $self->{'root'} = $self->{'safe'}->root();
695: #
696: # Place some of the %$self items into the safe space except the safe space
697: # itself
698: my $initstring = '';
699: foreach (qw/name domain type usymb cid csec coursefilename
700: cnum cdom chome uhome/) {
701: $initstring.= qq{\$$_="$self->{$_}";};
702: }
703: $self->{'safe'}->reval($initstring);
704: return $self;
705: }
706:
707: }
708:
709: ######################################################
710:
711: =pod
712:
713: =back
714:
715: =cut
716:
717: ######################################################
718:
719:
720: ######################################################
721:
722: =pod
723:
724: =item &mask($lower,$upper)
725:
726: Inputs: $lower and $upper, cell names ("X12" or "a150") or globs ("X*").
727:
728: Returns: Regular expression matching spreadsheet cells that are within
729: the rectangle defined by $lower and $upper. Due to the nature of the
730: regular expression this result must be used inside an eval().
731:
732: =cut
733:
734: ######################################################
735: {
736:
737: my %memoizer;
738:
739: sub mask {
740: my ($lower,$upper)=@_;
741: my $key = $lower.'_'.$upper;
742: if (exists($memoizer{$key})) {
743: return $memoizer{$key};
744: }
745: $upper = $lower if (! defined($upper));
746: #
747: my ($la,$ld) = ($lower=~/([A-z]|\*)(\d+|\*)/);
748: my ($ua,$ud) = ($upper=~/([A-z]|\*)(\d+|\*)/);
749: #
750: my $alpha='';
751: my $num='';
752: #
753: # Do not put parenthases around $alpha.
754: # $num depends on the value in $1.
755: if (($la eq '*') || ($ua eq '*')) {
756: $alpha='[A-z]';
757: } else {
758: if ($la gt $ua) {
759: my $tmp = $ua;
760: $ua = $la;
761: $la = $ua;
762: }
763: $alpha=qq/[$la-$ua]/;
764: }
765: if ($ld ne '*' && $ud ne '*') {
766: # Make sure $ld <= $ud
767: if ($ld > $ud) {
768: my $tmp = $ud;
769: $ud = $ld;
770: $ld = $tmp;
771: }
772: # Here we make a regular expression using some advanced regexp
773: # abilities.
774: # (\d+) will match the digits of the cell name and dump them in
775: # to $1
776: # (?(?{ ... code ...} pattern_if_true | pattern_if_false)) will
777: # choose pattern_if_true if { ... code ... } is true and
778: # pattern_if_false if { ... code ... } is false.
779: # In this case, pattern_if_true is empty. pattern_if_false is
780: # 'donotmatch' and will not match our cells because none of
781: # them end with donotmatch.
782: # Unfortunately, the use of this type of regular expression
783: # requires that each match be wrapped in an eval(). Search for
784: # $mask in this module for examples
785: $num = '(\d+)(?(?{$1>= '.$ld.' && $1<='.$ud.'})|donotmatch)';
786: } else {
787: $num = '(\d+)';
788: }
789: my $expression = '^'.$alpha.$num.'$';
790: $memoizer{$key} = $expression;
791: return $expression;
792: }
793:
794: #
795: # Debugging routine
796: sub dump_memoized_values {
797: while (my ($key,$value) = each(%memoizer)) {
798: &Apache::lonnet::logthis('memoizer: '.$key.' = '.$value);
799: }
800: return;
801: }
802:
803: }
804:
805: ##
806: ## sub add_hash_to_safe {} # spreadsheet, would like to destroy
807: ##
808:
809: #
810: # expandnamed used to reside in the safe space
811: #
812: sub expandnamed {
813: my $self = shift;
814: my $expression=shift;
815: if ($expression=~/^\&/) {
816: my ($func,$var,$formula)=($expression=~/^\&(\w+)\(([^\;]+)\;(.*)\)/);
817: my @vars=split(/\W+/,$formula);
818: my %values=();
819: foreach my $varname ( @vars ) {
820: if ($varname=~/^(parameter|stores|timestamp)/) {
821: $formula=~s/$varname/'$c{\''.$varname.'\'}'/ge;
822: $varname=~s/$var/\([\\w:\\- ]\+\)/g;
823: foreach (keys(%{$self->{'constants'}})) {
824: if ($_=~/$varname/) {
825: $values{$1}=1;
826: }
827: }
828: }
829: }
830: if ($func eq 'EXPANDSUM') {
831: my $result='';
832: foreach (keys(%values)) {
833: my $thissum=$formula;
834: $thissum=~s/$var/$_/g;
835: $result.=$thissum.'+';
836: }
837: $result=~s/\+$//;
838: return $result;
839: } else {
840: return 0;
841: }
842: } else {
843: # it is not a function, so it is a parameter name
844: # We should do the following:
845: # 1. Take the list of parameter names
846: # 2. look through the list for ones that match the parameter we want
847: # 3. If there are no collisions, return the one that matches
848: # 4. If there is a collision, return 'bad parameter name error'
849: my $returnvalue = '';
850: my @matches = ();
851: my @values = ();
852: $#matches = -1;
853: while (my($parameter,$value) = each(%{$self->{'constants'}})) {
854: next if ($parameter !~ /$expression/);
855: push(@matches,$parameter);
856: push(@values,$value);
857: }
858: if (scalar(@matches) == 0) {
859: $returnvalue = '""';#'"unmatched parameter: '.$parameter.'"';
860: } elsif (scalar(@matches) == 1) {
861: # why do we not do this lookup here, instead of delaying it?
862: $returnvalue = $values[0];
863: } elsif (scalar(@matches) > 0) {
864: # more than one match. Look for a concise one
865: $returnvalue = "'non-unique parameter name : $expression'";
866: for (my $i=0; $i<=$#matches;$i++) {
867: if ($matches[$i] =~ /^$expression$/) {
868: # why do we not do this lookup here?
869: $returnvalue = $values[$i];
870: }
871: }
872: } else {
873: # There was a negative number of matches, which indicates
874: # something is wrong with reality. Better warn the user.
875: $returnvalue = '"bizzare parameter: '.$expression.'"';
876: }
877: return $returnvalue;
878: }
879: }
880:
881: sub sett {
882: my $self = shift;
883: my %t=();
884: #
885: # Deal with the template row
886: foreach my $col ($self->template_cells()) {
887: next if ($col=~/^[A-Z]/);
888: foreach my $row ($self->rows()) {
889: # Get the name of this cell
890: my $cell=$col.$row;
891: # Grab the template declaration
892: $t{$cell}=$self->formula('template_'.$col);
893: # Replace '#' with the row number
894: $t{$cell}=~s/\#/$row/g;
895: # Replace '....' with ','
896: $t{$cell}=~s/\.\.+/\,/g;
897: # Replace 'A0' with the value from 'A0'
898: $t{$cell}=~s/(^|[^\"\'])([A-Za-z]\d+)/$1\$sheet_values\{\'$2\'\}/g;
899: # Replace parameters
900: $t{$cell}=~s/(^|[^\"\'])\[([^\]]+)\]/$1.$self->expandnamed($2)/ge;
901: }
902: }
903: #
904: # Deal with the normal cells
905: while (my($cell,$formula) = each(%{$self->{'formulas'}})) {
906: next if ($_=~/^template\_/);
907: my ($col,$row) = ($cell =~ /^([A-z])(\d+)$/);
908: if ($row eq '0') {
909: $t{$cell}=$formula;
910: $t{$cell}=~s/\.\.+/\,/g;
911: $t{$cell}=~s/(^|[^\"\'])([A-Za-z]\d+)/$1\$sheet_values\{\'$2\'\}/g;
912: $t{$cell}=~s/(^|[^\"\'])\[([^\]]+)\]/$1.$self->expandnamed($2)/ge;
913: } elsif ( $col =~ /^[A-Z]$/ ) {
914: if ($formula !~ /^\!/ && exists($self->{'constants'}->{$cell})) {
915: my $data = $self->{'constants'}->{$cell};
916: $t{$cell} = $data;
917: }
918: } else { # $row > 1 and $col =~ /[a-z]
919: $t{$cell}=$formula;
920: $t{$cell}=~s/\.\.+/\,/g;
921: $t{$cell}=~s/(^|[^\"\'])([A-Za-z]\d+)/$1\$sheet_values\{\'$2\'\}/g;
922: $t{$cell}=~s/(^|[^\"\'])\[([^\]]+)\]/$1.$self->expandnamed($2)/ge;
923: }
924: }
925: %{$self->{'safe'}->varglob('t')}=%t;
926: }
927:
928: ##
929: ## sync_safe_space: Called by calcsheet to make sure all the data we
930: # need to calculate is placed into the safe space
931: ##
932: sub sync_safe_space {
933: my $self = shift;
934: # Inside the safe space 'formulas' has a diabolical alter-ego named 'f'.
935: %{$self->{'safe'}->varglob('f')}=%{$self->{'formulas'}};
936: # 'constants' leads a peaceful hidden life of 'c'.
937: %{$self->{'safe'}->varglob('c')}=%{$self->{'constants'}};
938: # 'othersheets' hides as 'os', a disguise few can penetrate.
939: @{$self->{'safe'}->varglob('os')}=@{$self->{'othersheets'}};
940: }
941:
942: ##
943: ## Retrieve the error log from the safe space (used for debugging)
944: ##
945: sub get_errorlog {
946: my $self = shift;
947: $self->{'errorlog'} = $ { $self->{'safe'}->varglob('errorlog') };
948: return $self->{'errorlog'};
949: }
950:
951: ##
952: ## Clear the error log inside the safe space
953: ##
954: sub clear_errorlog {
955: my $self = shift;
956: $ {$self->{'safe'}->varglob('errorlog')} = '';
957: $self->{'errorlog'} = '';
958: }
959:
960: ##
961: ## constants: either set or get the constants
962: ##
963: sub constants {
964: my $self=shift;
965: my ($constants) = @_;
966: if (defined($constants)) {
967: if (! ref($constants)) {
968: my %tmp = @_;
969: $constants = \%tmp;
970: }
971: $self->{'constants'} = $constants;
972: return;
973: } else {
974: return %{$self->{'constants'}};
975: }
976: }
977:
978: ##
979: ## formulas: either set or get the formulas
980: ##
981: sub formulas {
982: my $self=shift;
983: my ($formulas) = @_;
984: if (defined($formulas)) {
985: if (! ref($formulas)) {
986: my %tmp = @_;
987: $formulas = \%tmp;
988: }
989: $self->{'formulas'} = $formulas;
990: $self->{'rows'} = [];
991: $self->{'template_cells'} = [];
992: return;
993: } else {
994: return %{$self->{'formulas'}};
995: }
996: }
997:
998: sub set_formula {
999: my $self = shift;
1000: my ($cell,$formula) = @_;
1001: $self->{'formulas'}->{$cell}=$formula;
1002: return;
1003: }
1004:
1005: ##
1006: ## formulas_keys: Return the keys to the formulas hash.
1007: ##
1008: sub formulas_keys {
1009: my $self = shift;
1010: my @keys = keys(%{$self->{'formulas'}});
1011: return keys(%{$self->{'formulas'}});
1012: }
1013:
1014: ##
1015: ## formula: Return the formula for a given cell in the spreadsheet
1016: ## returns '' if the cell does not have a formula or does not exist
1017: ##
1018: sub formula {
1019: my $self = shift;
1020: my $cell = shift;
1021: if (defined($cell) && exists($self->{'formulas'}->{$cell})) {
1022: return $self->{'formulas'}->{$cell};
1023: }
1024: return '';
1025: }
1026:
1027: ##
1028: ## logthis: write the input to lonnet.log
1029: ##
1030: sub logthis {
1031: my $self = shift;
1032: my $message = shift;
1033: &Apache::lonnet::logthis($self->{'type'}.':'.
1034: $self->{'name'}.':'.$self->{'domain'}.':'.
1035: $message);
1036: return;
1037: }
1038:
1039: ##
1040: ## dump_formulas_to_log: makes lonnet.log huge...
1041: ##
1042: sub dump_formulas_to_log {
1043: my $self =shift;
1044: $self->logthis("Spreadsheet formulas");
1045: $self->logthis("--------------------------------------------------------");
1046: while (my ($cell, $formula) = each(%{$self->{'formulas'}})) {
1047: $self->logthis(' '.$cell.' = '.$formula);
1048: }
1049: $self->logthis("--------------------------------------------------------");}
1050:
1051: ##
1052: ## value: returns the computed value of a particular cell
1053: ##
1054: sub value {
1055: my $self = shift;
1056: my $cell = shift;
1057: if (defined($cell) && exists($self->{'values'}->{$cell})) {
1058: return $self->{'values'}->{$cell};
1059: }
1060: return '';
1061: }
1062:
1063: ##
1064: ## dump_values_to_log: makes lonnet.log huge...
1065: ##
1066: sub dump_values_to_log {
1067: my $self =shift;
1068: $self->logthis("Spreadsheet Values");
1069: $self->logthis("------------------------------------------------------");
1070: while (my ($cell, $value) = each(%{$self->{'values'}})) {
1071: $self->logthis(' '.$cell.' = '.$value);
1072: }
1073: $self->logthis("------------------------------------------------------");
1074: }
1075:
1076: ##
1077: ## Yet another debugging function
1078: ##
1079: sub dump_hash_to_log {
1080: my $self= shift();
1081: my %tmp = @_;
1082: if (@_<2) {
1083: %tmp = %{$_[0]};
1084: }
1085: $self->logthis('---------------------------- (begin hash dump)');
1086: while (my ($key,$val) = each (%tmp)) {
1087: $self->logthis(' '.$key.' = '.$val.':');
1088: }
1089: $self->logthis('---------------------------- (finished hash dump)');
1090: }
1091:
1092: ##
1093: ## rebuild_stats: rebuilds the rows and template_cells arrays
1094: ##
1095: sub rebuild_stats {
1096: my $self = shift;
1097: $self->{'rows'}=[];
1098: $self->{'template_cells'}=[];
1099: while (my ($cell,$formula) = each(%{$self->{'formulas'}})) {
1100: push(@{$self->{'rows'}},$1) if ($cell =~ /^A(\d+)/ && $1 != 0);
1101: push(@{$self->{'template_cells'}},$1) if ($cell =~ /^template_(\w+)/);
1102: }
1103: return;
1104: }
1105:
1106: ##
1107: ## template_cells returns a list of the cells defined in the template row
1108: ##
1109: sub template_cells {
1110: my $self = shift;
1111: $self->rebuild_stats() if (! defined($self->{'template_cells'}) ||
1112: ! @{$self->{'template_cells'}});
1113: return @{$self->{'template_cells'}};
1114: }
1115:
1116: ##
1117: ## Sigh....
1118: ##
1119: sub setothersheets {
1120: my $self = shift;
1121: my @othersheets = @_;
1122: $self->{'othersheets'} = \@othersheets;
1123: }
1124:
1125: ##
1126: ## rows returns a list of the names of cells defined in the A column
1127: ##
1128: sub rows {
1129: my $self = shift;
1130: $self->rebuild_stats() if (!@{$self->{'rows'}});
1131: return @{$self->{'rows'}};
1132: }
1133:
1134: #
1135: # calcsheet: makes all the calls to compute the spreadsheet.
1136: #
1137: sub calcsheet {
1138: my $self = shift;
1139: $self->sync_safe_space();
1140: $self->clear_errorlog();
1141: $self->sett();
1142: my $result = $self->{'safe'}->reval('&calc();');
1143: # $self->logthis($self->get_errorlog());
1144: %{$self->{'values'}} = %{$self->{'safe'}->varglob('sheet_values')};
1145: # $self->logthis($self->get_errorlog());
1146: if ($result ne 'okay') {
1147: $self->set_calcerror($result);
1148: }
1149: return $result;
1150: }
1151:
1152: sub set_badcalc {
1153: my $self = shift();
1154: $self->{'badcalc'} =1;
1155: return;
1156: }
1157:
1158: sub badcalc {
1159: my $self = shift;
1160: if (exists($self->{'badcalc'}) && $self->{'badcalc'}) {
1161: return 1;
1162: } else {
1163: return 0;
1164: }
1165: }
1166:
1167: sub set_calcerror {
1168: my $self = shift;
1169: if (@_) {
1170: $self->set_badcalc();
1171: if (exists($self->{'calcerror'})) {
1172: $self->{'calcerror'}.="\n".$_[0];
1173: } else {
1174: $self->{'calcerror'}.=$_[0];
1175: }
1176: }
1177: }
1178:
1179: sub calcerror {
1180: my $self = shift;
1181: if ($self->badcalc()) {
1182: if (exists($self->{'calcerror'})) {
1183: return $self->{'calcerror'};
1184: }
1185: }
1186: return;
1187: }
1188:
1189: ###########################################################
1190: ##
1191: ## Output Helpers
1192: ##
1193: ###########################################################
1194: sub display {
1195: my $self = shift;
1196: my ($r) = @_;
1197: my $outputmode = 'html';
1198: foreach ($self->output_options()) {
1199: if ($ENV{'form.output_format'} eq $_->{'value'}) {
1200: $outputmode = $_->{'value'};
1201: last;
1202: }
1203: }
1204: if ($outputmode eq 'html') {
1205: $self->compute($r);
1206: $self->outsheet_html($r);
1207: } elsif ($outputmode eq 'htmlclasslist') {
1208: # No computation neccessary... This is kludgy
1209: $self->outsheet_htmlclasslist($r);
1210: } elsif ($outputmode eq 'excel') {
1211: $self->compute($r);
1212: $self->outsheet_excel($r);
1213: } elsif ($outputmode eq 'csv') {
1214: $self->compute($r);
1215: $self->outsheet_csv($r);
1216: } elsif ($outputmode eq 'xml') {
1217: # $self->compute($r);
1218: $self->outsheet_xml($r);
1219: }
1220: $self->cleanup();
1221: return;
1222: }
1223:
1224: ############################################
1225: ## HTML output routines ##
1226: ############################################
1227: sub html_report_error {
1228: my $self = shift();
1229: my $Str = '';
1230: if ($self->badcalc()) {
1231: $Str = '<h3 style="color:red">'.
1232: &mt('An error occurred while calculating this spreadsheet').
1233: "</h3>\n".
1234: '<pre>'.$self->calcerror()."</pre>\n";
1235: }
1236: return $Str;
1237: }
1238:
1239: sub html_export_row {
1240: my $self = shift();
1241: my ($color) = @_;
1242: $color = '#CCCCFF' if (! defined($color));
1243: my $allowed = &Apache::lonnet::allowed('mgr',$ENV{'request.course.id'});
1244: my $row_html;
1245: my @rowdata = $self->get_row(0);
1246: foreach my $cell (@rowdata) {
1247: if ($cell->{'name'} =~ /^[A-Z]/) {
1248: $row_html .= '<td bgcolor="'.$color.'">'.
1249: &html_editable_cell($cell,$color,$allowed).'</td>';
1250: } else {
1251: $row_html .= '<td bgcolor="#DDCCFF">'.
1252: &html_editable_cell($cell,'#DDCCFF',$allowed).'</td>';
1253: }
1254: }
1255: return $row_html;
1256: }
1257:
1258: sub html_template_row {
1259: my $self = shift();
1260: my $allowed = &Apache::lonnet::allowed('mgr',$ENV{'request.course.id'});
1261: my ($num_uneditable,$importcolor) = @_;
1262: my $row_html;
1263: my @rowdata = $self->get_template_row();
1264: my $count = 0;
1265: for (my $i = 0; $i<=$#rowdata; $i++) {
1266: my $cell = $rowdata[$i];
1267: if ($i < $num_uneditable) {
1268: $row_html .= '<td bgcolor="'.$importcolor.'">'.
1269: &html_uneditable_cell($cell,'#FFDDDD',$allowed).'</td>';
1270: } else {
1271: $row_html .= '<td bgcolor="#EOFFDD">'.
1272: &html_editable_cell($cell,'#EOFFDD',$allowed).'</td>';
1273: }
1274: }
1275: return $row_html;
1276: }
1277:
1278: sub html_editable_cell {
1279: my ($cell,$bgcolor,$allowed) = @_;
1280: my $result;
1281: my ($name,$formula,$value);
1282: if (defined($cell)) {
1283: $name = $cell->{'name'};
1284: $formula = $cell->{'formula'};
1285: $value = $cell->{'value'};
1286: }
1287: $name = '' if (! defined($name));
1288: $formula = '' if (! defined($formula));
1289: if (! defined($value)) {
1290: $value = '<font color="'.$bgcolor.'">#</font>';
1291: if ($formula ne '') {
1292: $value = '<i>undefined value</i>';
1293: }
1294: } elsif ($value =~ /^\s*$/ ) {
1295: $value = '<font color="'.$bgcolor.'">#</font>';
1296: } else {
1297: $value = &HTML::Entities::encode($value,'<>&"') if ($value !~/ /);
1298: }
1299: return $value if (! $allowed);
1300: #
1301: # The formula will be parsed by the browser twice before being
1302: # displayed to the user for editing.
1303: #
1304: # The encoding string "^A-blah" is placed in []'s inside a regexp, so
1305: # we specify the characters we want left alone by putting a '^' in front.
1306: $formula = &HTML::Entities::encode($formula,'^A-z0-9 !#$%-;=?~');
1307: # HTML::Entities::encode does not catch everything - we need '\' encoded
1308: $formula =~ s/\\/&\#092/g;
1309: # Escape it again - this time the only encodable character is '&'
1310: $formula =~ s/\&/\&/g;
1311: # Glue everything together
1312: $result .= "<a href=\"javascript:celledit(\'".
1313: $name."','".$formula."');\">".$value."</a>";
1314: return $result;
1315: }
1316:
1317: sub html_uneditable_cell {
1318: my ($cell,$bgcolor) = @_;
1319: my $value = (defined($cell) ? $cell->{'value'} : '');
1320: $value = &HTML::Entities::encode($value,'<>&"') if ($value !~/ /);
1321: return ' '.$value.' ';
1322: }
1323:
1324: sub html_row {
1325: my $self = shift();
1326: my ($num_uneditable,$row,$exportcolor,$importcolor) = @_;
1327: my $allowed = &Apache::lonnet::allowed('mgr',$ENV{'request.course.id'});
1328: my @rowdata = $self->get_row($row);
1329: my $num_cols_output = 0;
1330: my $row_html;
1331: my $color = $importcolor;
1332: if ($row == 0) {
1333: $color = $exportcolor;
1334: }
1335: $color = '#FFDDDD' if (! defined($color));
1336: foreach my $cell (@rowdata) {
1337: if ($num_cols_output++ < $num_uneditable) {
1338: $row_html .= '<td bgcolor="'.$color.'">';
1339: $row_html .= &html_uneditable_cell($cell,'#FFDDDD');
1340: } else {
1341: $row_html .= '<td bgcolor="#EOFFDD">';
1342: $row_html .= &html_editable_cell($cell,'#E0FFDD',$allowed);
1343: }
1344: $row_html .= '</td>';
1345: }
1346: return $row_html;
1347: }
1348:
1349: sub html_header {
1350: my $self = shift;
1351: return '' if (! $ENV{'request.role.adv'});
1352: return "<table>\n".
1353: '<tr><th align="center">'.&mt('Output Format').'</th></tr>'."\n".
1354: '<tr><td>'.$self->output_selector()."</td></tr>\n".
1355: "</table>\n";
1356: }
1357:
1358: ##
1359: ## Default output types are HTML, Excel, and CSV
1360: sub output_options {
1361: my $self = shift();
1362: return ({value => 'html',
1363: description => 'HTML'},
1364: {value => 'excel',
1365: description => 'Excel'},
1366: # {value => 'xml',
1367: # description => 'XML'},
1368: {value => 'csv',
1369: description => 'Comma Separated Values'},);
1370: }
1371:
1372: sub output_selector {
1373: my $self = shift();
1374: my $output_selector = '<select name="output_format" size="3">'."\n";
1375: my $default = 'html';
1376: if (exists($ENV{'form.output_format'})) {
1377: $default = $ENV{'form.output_format'}
1378: } else {
1379: $ENV{'form.output_format'} = $default;
1380: }
1381: foreach ($self->output_options()) {
1382: $output_selector.='<option value="'.$_->{'value'}.'"';
1383: if ($_->{'value'} eq $default) {
1384: $output_selector .= ' selected';
1385: }
1386: $output_selector .= ">".&mt($_->{'description'})."</option>\n";
1387: }
1388: $output_selector .= "</select>\n";
1389: return $output_selector;
1390: }
1391:
1392: ################################################
1393: ## Excel output routines ##
1394: ################################################
1395: sub excel_output_row {
1396: my $self = shift;
1397: my ($worksheet,$rownum,$rows_output,@prepend) = @_;
1398: my $cols_output = 0;
1399: #
1400: my @rowdata = $self->get_row($rownum);
1401: foreach my $cell (@prepend,@rowdata) {
1402: my $value = $cell;
1403: $value = $cell->{'value'} if (ref($value));
1404: $value =~ s/\ / /gi;
1405: $worksheet->write($rows_output,$cols_output++,$value);
1406: }
1407: return;
1408: }
1409:
1410: sub create_excel_spreadsheet {
1411: my $self = shift;
1412: my ($r) = @_;
1413: my $filename = '/prtspool/'.
1414: $ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'.
1415: time.'_'.rand(1000000000).'.xls';
1416: my $workbook = Spreadsheet::WriteExcel->new('/home/httpd'.$filename);
1417: if (! defined($workbook)) {
1418: $r->log_error("Error creating excel spreadsheet $filename: $!");
1419: $r->print(&mt("Problems creating new Excel file. ".
1420: "This error has been logged. ".
1421: "Please alert your LON-CAPA administrator"));
1422: return undef;
1423: }
1424: #
1425: # The excel spreadsheet stores temporary data in files, then put them
1426: # together. If needed we should be able to disable this (memory only).
1427: # The temporary directory must be specified before calling 'addworksheet'.
1428: # File::Temp is used to determine the temporary directory.
1429: $workbook->set_tempdir('/home/httpd/perl/tmp');
1430: #
1431: # Determine the name to give the worksheet
1432: return ($workbook,$filename);
1433: }
1434:
1435: #
1436: # This routine is just a stub
1437: sub outsheet_htmlclasslist {
1438: my $self = shift;
1439: my ($r) = @_;
1440: $r->print('<h2>'.&mt("This output is not supported").'</h2>');
1441: $r->rflush();
1442: return;
1443: }
1444:
1445: sub outsheet_excel {
1446: my $self = shift;
1447: my ($r) = @_;
1448: my $connection = $r->connection();
1449: #
1450: $r->print($self->html_report_error());
1451: $r->rflush();
1452: #
1453: $r->print("<h2>".&mt('Preparing Excel Spreadsheet')."</h2>");
1454: #
1455: # Create excel worksheet
1456: my ($workbook,$filename) = $self->create_excel_spreadsheet($r);
1457: return if (! defined($workbook));
1458: #
1459: # Create main worksheet
1460: my $worksheet = $workbook->addworksheet('main');
1461: my $rows_output = 0;
1462: my $cols_output = 0;
1463: #
1464: # Write excel header
1465: foreach my $value ($self->get_title()) {
1466: $cols_output = 0;
1467: $worksheet->write($rows_output++,$cols_output,$value);
1468: }
1469: $rows_output++; # skip a line
1470: #
1471: # Write summary/export row
1472: $cols_output = 0;
1473: $self->excel_output_row($worksheet,0,$rows_output++,'Summary');
1474: $rows_output++; # skip a line
1475: #
1476: $self->excel_rows($connection,$worksheet,$cols_output,$rows_output);
1477: #
1478: #
1479: # Close the excel file
1480: $workbook->close();
1481: #
1482: # Write a link to allow them to download it
1483: $r->print('<br />'.
1484: '<a href="'.$filename.'">Your Excel spreadsheet.</a>'."\n");
1485: return;
1486: }
1487:
1488: #################################
1489: ## CSV output routines ##
1490: #################################
1491: sub outsheet_csv {
1492: my $self = shift;
1493: my ($r) = @_;
1494: my $connection = $r->connection();
1495: #
1496: $r->print($self->html_report_error());
1497: $r->rflush();
1498: #
1499: my $csvdata = '';
1500: my @Values;
1501: #
1502: # Open the csv file
1503: my $filename = '/prtspool/'.
1504: $ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'.
1505: time.'_'.rand(1000000000).'.csv';
1506: my $file;
1507: unless ($file = Apache::File->new('>'.'/home/httpd'.$filename)) {
1508: $r->log_error("Couldn't open $filename for output $!");
1509: $r->print(&mt("Problems occured in writing the csv file. ".
1510: "This error has been logged. ".
1511: "Please alert your LON-CAPA administrator."));
1512: $r->print("<pre>\n".$csvdata."</pre>\n");
1513: return 0;
1514: }
1515: #
1516: # Output the title information
1517: foreach my $value ($self->get_title()) {
1518: print $file "'".&Apache::loncommon::csv_translate($value)."'\n";
1519: }
1520: #
1521: # Output the body of the spreadsheet
1522: $self->csv_rows($connection,$file);
1523: #
1524: # Close the csv file
1525: close($file);
1526: $r->print('<br /><br />'.
1527: '<a href="'.$filename.'">'.&mt('Your CSV spreadsheet.').'</a>'."\n");
1528: #
1529: return 1;
1530: }
1531:
1532: sub csv_output_row {
1533: my $self = shift;
1534: my ($filehandle,$rownum,@prepend) = @_;
1535: #
1536: my @rowdata = ();
1537: if (defined($rownum)) {
1538: @rowdata = $self->get_row($rownum);
1539: }
1540: my @output = ();
1541: foreach my $cell (@prepend,@rowdata) {
1542: my $value = $cell;
1543: $value = $cell->{'value'} if (ref($value));
1544: $value =~ s/\ / /gi;
1545: $value = "'".$value."'";
1546: push (@output,$value);
1547: }
1548: print $filehandle join(',',@output )."\n";
1549: return;
1550: }
1551:
1552: ############################################
1553: ## XML output routines ##
1554: ############################################
1555: sub outsheet_xml {
1556: my $self = shift;
1557: my ($r) = @_;
1558: ## Someday XML
1559: ## Will be rendered for the user
1560: ## But not on this day
1561: my $Str = '<spreadsheet type="'.$self->{'type'}.'">'."\n";
1562: while (my ($cell,$formula) = each(%{$self->{'formulas'}})) {
1563: if ($cell =~ /^template_(\w+)/) {
1564: my $col = $1;
1565: $Str .= '<template col="'.$col.'">'.$formula.'</template>'."\n";
1566: } else {
1567: my ($col,$row) = ($cell =~ /^([A-z])(\d+)/);
1568: next if (! defined($row) || ! defined($col));
1569: next if ($row != 0);
1570: $Str .=
1571: '<field row="'.$row.'" col="'.$col.'" >'.$formula.'</field>'
1572: ."\n";
1573: }
1574: }
1575: $Str.="</spreadsheet>";
1576: $r->print("<pre>\n\n\n".$Str."\n\n\n</pre>");
1577: return $Str;
1578: }
1579:
1580: ############################################
1581: ### Filesystem routines ###
1582: ############################################
1583: sub parse_sheet {
1584: # $sheetxml is a scalar reference or a scalar
1585: my ($sheetxml) = @_;
1586: if (! ref($sheetxml)) {
1587: my $tmp = $sheetxml;
1588: $sheetxml = \$tmp;
1589: }
1590: my %formulas;
1591: my %sources;
1592: my $parser=HTML::TokeParser->new($sheetxml);
1593: my $token;
1594: while ($token=$parser->get_token) {
1595: if ($token->[0] eq 'S') {
1596: if ($token->[1] eq 'field') {
1597: my $cell = $token->[2]->{'col'}.$token->[2]->{'row'};
1598: my $source = $token->[2]->{'source'};
1599: my $formula = $parser->get_text('/field');
1600: $formulas{$cell} = $formula;
1601: $sources{$cell} = $source if (defined($source));
1602: $parser->get_text('/field');
1603: } elsif ($token->[1] eq 'template') {
1604: $formulas{'template_'.$token->[2]->{'col'}}=
1605: $parser->get_text('/template');
1606: }
1607: }
1608: }
1609: return (\%formulas,\%sources);
1610: }
1611:
1612: {
1613:
1614: my %spreadsheets;
1615:
1616: sub clear_spreadsheet_definition_cache {
1617: undef(%spreadsheets);
1618: }
1619:
1620: sub load_system_default_sheet {
1621: my $self = shift;
1622: my $includedir = $Apache::lonnet::perlvar{'lonIncludes'};
1623: # load in the default defined spreadsheet
1624: my $sheetxml='';
1625: my $fh;
1626: if ($fh=Apache::File->new($includedir.'/default_'.$self->{'type'})) {
1627: $sheetxml=join('',<$fh>);
1628: $fh->close();
1629: } else {
1630: # $sheetxml='<field row="0" col="A">"Error"</field>';
1631: $sheetxml='<field row="0" col="A"></field>';
1632: }
1633: $self->filename('default_');
1634: my ($formulas,undef) = &parse_sheet(\$sheetxml);
1635: return $formulas;
1636: }
1637:
1638: sub load {
1639: my $self = shift;
1640: #
1641: my $stype = $self->{'type'};
1642: my $cnum = $self->{'cnum'};
1643: my $cdom = $self->{'cdom'};
1644: my $chome = $self->{'chome'};
1645: #
1646: my $filename = $self->filename();
1647: my $cachekey = join('_',($cnum,$cdom,$stype,$filename));
1648: #
1649: # see if sheet is cached
1650: my ($formulas);
1651: if (exists($spreadsheets{$cachekey})) {
1652: $formulas = $spreadsheets{$cachekey}->{'formulas'};
1653: } else {
1654: # Not cached, need to read
1655: if (! defined($filename)) {
1656: $formulas = $self->load_system_default_sheet();
1657: } elsif($filename =~ /^\/res\/.*\.spreadsheet$/) {
1658: # Load a spreadsheet definition file
1659: my $sheetxml=&Apache::lonnet::getfile
1660: (&Apache::lonnet::filelocation('',$filename));
1661: if ($sheetxml == -1) {
1662: $sheetxml='<field row="0" col="A">"Error loading spreadsheet '
1663: .$self->filename().'"</field>';
1664: }
1665: ($formulas,undef) = &parse_sheet(\$sheetxml);
1666: # Get just the filename and set the sheets filename
1667: my ($newfilename) = ($filename =~ /\/([^\/]*)\.spreadsheet$/);
1668: if ($self->is_default()) {
1669: $self->filename($newfilename);
1670: $self->make_default();
1671: } else {
1672: $self->filename($newfilename);
1673: }
1674: } else {
1675: # Load the spreadsheet definition file from the save file
1676: my %tmphash = &Apache::lonnet::dump($filename,$cdom,$cnum);
1677: my ($tmp) = keys(%tmphash);
1678: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
1679: while (my ($cell,$formula) = each(%tmphash)) {
1680: $formulas->{$cell}=$formula;
1681: }
1682: } else {
1683: $formulas = $self->load_system_default_sheet();
1684: }
1685: }
1686: $filename=$self->filename(); # filename may have changed
1687: $cachekey = join('_',($cnum,$cdom,$stype,$filename));
1688: %{$spreadsheets{$cachekey}->{'formulas'}} = %{$formulas};
1689: }
1690: $self->formulas($formulas);
1691: $self->set_row_sources();
1692: $self->set_row_numbers();
1693: }
1694:
1695: sub set_row_sources {
1696: my $self = shift;
1697: while (my ($cell,$value) = each(%{$self->{'formulas'}})) {
1698: next if ($cell !~ /^A(\d+)/ || $1 < 1);
1699: my $row = $1;
1700: $self->{'row_source'}->{$row} = $value;
1701: }
1702: return;
1703: }
1704:
1705: sub set_row_numbers {
1706: my $self = shift;
1707: while (my ($cell,$value) = each(%{$self->{'formulas'}})) {
1708: next if ($cell !~ /^A(\d+)$/);
1709: next if (! defined($value));
1710: $self->{'row_numbers'}->{$value} = $1;
1711: $self->{'maxrow'} = $1 if ($1 > $self->{'maxrow'});
1712: }
1713: }
1714:
1715: ##
1716: ## exportrow is *not* used to get the export row from a computed sub-sheet.
1717: ##
1718: sub exportrow {
1719: my $self = shift;
1720: if (exists($self->{'badcalc'}) && $self->{'badcalc'}) {
1721: return ();
1722: }
1723: my @exportarray;
1724: foreach my $column (@UC_Columns) {
1725: push(@exportarray,$self->value($column.'0'));
1726: }
1727: return @exportarray;
1728: }
1729:
1730: sub save {
1731: my $self = shift;
1732: my ($makedef)=@_;
1733: my $cid=$self->{'cid'};
1734: # If we are saving it, it must not be temporary
1735: $self->temporary(0);
1736: if (&Apache::lonnet::allowed('opa',$cid)) {
1737: my %f=$self->formulas();
1738: my $stype = $self->{'type'};
1739: my $cnum = $self->{'cnum'};
1740: my $cdom = $self->{'cdom'};
1741: my $chome = $self->{'chome'};
1742: my $filename = $self->{'filename'};
1743: my $cachekey = join('_',($cnum,$cdom,$stype,$filename));
1744: # Cache new sheet
1745: %{$spreadsheets{$cachekey}->{'formulas'}}=%f;
1746: # Write sheet
1747: foreach (keys(%f)) {
1748: delete($f{$_}) if ($f{$_} eq 'import');
1749: }
1750: my $reply = &Apache::lonnet::put($filename,\%f,$cdom,$cnum);
1751: return $reply if ($reply ne 'ok');
1752: $reply = &Apache::lonnet::put($stype.'_spreadsheets',
1753: {$filename => $ENV{'user.name'}.'@'.$ENV{'user.domain'}},
1754: $cdom,$cnum);
1755: return $reply if ($reply ne 'ok');
1756: if ($makedef) {
1757: $reply = &Apache::lonnet::put('environment',
1758: {'spreadsheet_default_'.$stype => $filename },
1759: $cdom,$cnum);
1760: return $reply if ($reply ne 'ok');
1761: }
1762: if ($self->is_default()) {
1763: if ($self->{'type'} eq 'studentcalc') {
1764: &Apache::lonnet::expirespread('','','studentcalc','');
1765: } elsif ($self->{'type'} eq 'assesscalc') {
1766: &Apache::lonnet::expirespread('','','assesscalc','');
1767: &Apache::lonnet::expirespread('','','studentcalc','');
1768: }
1769: }
1770: return $reply;
1771: }
1772: return 'unauthorized';
1773: }
1774:
1775: } # end of scope for %spreadsheets
1776:
1777: sub save_tmp {
1778: my $self = shift;
1779: my $filename=$ENV{'user.name'}.'_'.
1780: $ENV{'user.domain'}.'_spreadsheet_'.$self->{'symb'}.'_'.
1781: $self->{'filename'};
1782: $filename=~s/\W/\_/g;
1783: $filename=$Apache::lonnet::tmpdir.$filename.'.tmp';
1784: $self->temporary(1);
1785: my $fh;
1786: if ($fh=Apache::File->new('>'.$filename)) {
1787: my %f = $self->formulas();
1788: while( my ($cell,$formula) = each(%f)) {
1789: next if ($formula eq 'import');
1790: print $fh &Apache::lonnet::escape($cell)."=".
1791: &Apache::lonnet::escape($formula)."\n";
1792: }
1793: $fh->close();
1794: }
1795: }
1796:
1797: sub load_tmp {
1798: my $self = shift;
1799: my $filename=$ENV{'user.name'}.'_'.
1800: $ENV{'user.domain'}.'_spreadsheet_'.$self->{'symb'}.'_'.
1801: $self->{'filename'};
1802: $filename=~s/\W/\_/g;
1803: $filename=$Apache::lonnet::tmpdir.$filename.'.tmp';
1804: my %formulas = ();
1805: if (my $spreadsheet_file = Apache::File->new($filename)) {
1806: while (<$spreadsheet_file>) {
1807: chomp;
1808: my ($cell,$formula) = split(/=/);
1809: $cell = &Apache::lonnet::unescape($cell);
1810: $formula = &Apache::lonnet::unescape($formula);
1811: $formulas{$cell} = $formula;
1812: }
1813: $spreadsheet_file->close();
1814: }
1815: # flag the sheet as temporary
1816: $self->temporary(1);
1817: $self->formulas(\%formulas);
1818: $self->set_row_sources();
1819: $self->set_row_numbers();
1820: return;
1821: }
1822:
1823: sub temporary {
1824: my $self=shift;
1825: if (@_) {
1826: ($self->{'temporary'})= @_;
1827: }
1828: return $self->{'temporary'};
1829: }
1830:
1831: sub modify_cell {
1832: # studentcalc overrides this
1833: my $self = shift;
1834: my ($cell,$formula) = @_;
1835: if ($cell =~ /([A-z])\-/) {
1836: $cell = 'template_'.$1;
1837: } elsif ($cell !~ /^([A-z](\d+)|template_[A-z])$/) {
1838: return;
1839: }
1840: $self->set_formula($cell,$formula);
1841: $self->rebuild_stats();
1842: return;
1843: }
1844:
1845: ###########################################
1846: # othersheets: Returns the list of other spreadsheets available
1847: ###########################################
1848: sub othersheets {
1849: my $self = shift();
1850: my ($stype) = @_;
1851: $stype = $self->{'type'} if (! defined($stype) || $stype !~ /calc$/);
1852: #
1853: my @alternatives=();
1854: my %results=&Apache::lonnet::dump($stype.'_spreadsheets',
1855: $self->{'cdom'}, $self->{'cnum'});
1856: my ($tmp) = keys(%results);
1857: if ($tmp =~ /^(con_lost|error|no_such_host)/i ) {
1858: @alternatives = (&mt('Default'));
1859: } else {
1860: @alternatives = (&mt('Default'), sort (keys(%results)));
1861: }
1862: return @alternatives;
1863: }
1864:
1865: sub blackout {
1866: my $self = shift;
1867: $self->{'blackout'} = $_[0] if (@_);
1868: return $self->{'blackout'};
1869: }
1870:
1871: sub get_row {
1872: my $self = shift;
1873: my ($n)=@_;
1874: my @cols=();
1875: foreach my $col (@UC_Columns,@LC_Columns) {
1876: my $cell = $col.$n;
1877: push(@cols,{ name => $cell,
1878: formula => $self->formula($cell),
1879: value => $self->value($cell)});
1880: }
1881: return @cols;
1882: }
1883:
1884: sub get_template_row {
1885: my $self = shift;
1886: my @cols=();
1887: foreach my $col (@UC_Columns,@LC_Columns) {
1888: my $cell = 'template_'.$col;
1889: push(@cols,{ name => $cell,
1890: formula => $self->formula($cell),
1891: value => $self->formula($cell) });
1892: }
1893: return @cols;
1894: }
1895:
1896: sub need_to_save {
1897: my $self = shift;
1898: if ($self->{'new_rows'} && ! $self->temporary()) {
1899: return 1;
1900: }
1901: return 0;
1902: }
1903:
1904: sub get_row_number_from_key {
1905: my $self = shift;
1906: my ($key) = @_;
1907: if (! exists($self->{'row_numbers'}->{$key}) ||
1908: ! defined($self->{'row_numbers'}->{$key})) {
1909: # I used to set $f here to the new value, but the key passed for lookup
1910: # may not be the key we need to save
1911: $self->{'maxrow'}++;
1912: $self->{'row_numbers'}->{$key} = $self->{'maxrow'};
1913: # $self->logthis('added row '.$self->{'row_numbers'}->{$key}.
1914: # ' for '.$key);
1915: $self->{'new_rows'} = 1;
1916: }
1917: return $self->{'row_numbers'}->{$key};
1918: }
1919:
1920: 1;
1921:
1922: __END__
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