1: # The LearningOnline Network with CAPA
2: # Server for RAT Maps
3: #
4: # $Id: lonratsrv.pm,v 1.16 2001/11/29 19:23:49 www Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # (Edit Handler for RAT Maps
29: # (TeX Content Handler
30: #
31: # 05/29/00,05/30 Gerd Kortemeyer)
32: # 7/1 Gerd Kortemeyer)
33: # 7/1,7/3,7/4,7/7,7/8,7/10,7/26,10/2 Gerd Kortemeyer
34: # 4/30/2001 Scott Harrison
35: # 5/3,06/25,07/03,07/04,07/05 Gerd Kortemeyer
36:
37: package Apache::lonratsrv;
38:
39: use strict;
40: use Apache::Constants qw(:common);
41: use Apache::File;
42: use HTML::TokeParser;
43:
44:
45: # ------------------------------------------------------------- From RAT to XML
46:
47: sub qtescape {
48: my $str=shift;
49: $str=~s/\&\#58\;/\:/g;
50: $str=~s/\&\#39\;/\'/g;
51: $str=~s/\&\#44\;/\,/g;
52: $str=~s/\"/\&\#34\;/g;
53: return $str;
54: }
55:
56: # ------------------------------------------------------------- From XML to RAT
57:
58: sub qtunescape {
59: my $str=shift;
60: $str=~s/\:/\&colon\;/g;
61: $str=~s/\'/\&\#39\;/g;
62: $str=~s/\,/\&\#44\;/g;
63: $str=~s/\"/\&\#34\;/g;
64: return $str;
65: }
66:
67: # --------------------------------------------------------- Loads map from disk
68:
69: sub loadmap {
70: my ($fn,$errtext)=@_;
71: my $outstr='';
72: my @content=();
73: my @obj=();
74: my @links=();
75: if (-e $fn) {
76: {
77: my $fh=Apache::File->new($fn);
78: @content=<$fh>;
79: }
80: my $instr=join('',@content);
81: my $parser = HTML::TokeParser->new(\$instr);
82: my $token;
83: my $graphmode=0;
84:
85: $fn=~/\.(\w+)$/;
86: $outstr="mode<:>$1";
87:
88: while ($token = $parser->get_token) {
89: if ($token->[0] eq 'S') {
90: if ($token->[1] eq 'map') {
91: $graphmode=($token->[2]->{'mode'} eq 'rat/graphical');
92: } elsif ($token->[1] eq 'resource') {
93: # -------------------------------------------------------------------- Resource
94: $outstr.='<&>objcont';
95: if ($token->[2]->{'id'}) {
96: $outstr.='<:>'.$token->[2]->{'id'};
97: if ($obj[$token->[2]->{'id'}]==1) {
98: $errtext.='Error: multiple use of ID '.
99: $token->[2]->{'id'}.'. ';
100: }
101: $obj[$token->[2]->{'id'}]=1;
102: } else {
103: my $i=1;
104: while (($i<=$#obj) && ($obj[$i]!=0)) { $i++; }
105: $outstr.='<:>'.$i;
106: $obj[$i]=1;
107: }
108: $outstr.='<:>';
109: $outstr.=qtunescape($token->[2]->{'title'}).":";
110: $outstr.=qtunescape($token->[2]->{'src'}).":";
111: if ($token->[2]->{'external'} eq 'true') {
112: $outstr.='true:';
113: } else {
114: $outstr.='false:';
115: }
116: if ($token->[2]->{'type'}) {
117: $outstr.=$token->[2]->{'type'}.':';
118: } else {
119: $outstr.='normal:';
120: }
121: $outstr.='res';
122: } elsif ($token->[1] eq 'condition') {
123: # ------------------------------------------------------------------- Condition
124: $outstr.='<&>objcont';
125: if ($token->[2]->{'id'}) {
126: $outstr.='<:>'.$token->[2]->{'id'};
127: if ($obj[$token->[2]->{'id'}]==1) {
128: $errtext.='Error: multiple use of ID '.
129: $token->[2]->{'id'}.'. ';
130: }
131: $obj[$token->[2]->{'id'}]=1;
132: } else {
133: my $i=1;
134: while (($i<=$#obj) && ($obj[$i]!=0)) { $i++; }
135: $outstr.='<:>'.$i;
136: $obj[$i]=1;
137: }
138: $outstr.='<:>';
139: $outstr.=qtunescape($token->[2]->{'value'}).':';
140: if ($token->[2]->{'type'}) {
141: $outstr.=$token->[2]->{'type'}.':';
142: } else {
143: $outstr.='normal:';
144: }
145: $outstr.='cond';
146: } elsif ($token->[1] eq 'link') {
147: # ----------------------------------------------------------------------- Links
148: $outstr.='<&>objlinks';
149:
150: if ($token->[2]->{'index'}) {
151: if ($links[$token->[2]->{'index'}]) {
152: $errtext.='Error: multiple use of link index '.
153: $token->[2]->{'index'}.'. ';
154: }
155: $outstr.='<:>'.$token->[2]->{'index'};
156: $links[$token->[2]->{'index'}]=1;
157: } else {
158: my $i=1;
159: while (($i<=$#links) && ($links[$i]==1)) { $i++; }
160: $outstr.='<:>'.$i;
161: $links[$i]=1;
162: }
163:
164: $outstr.='<:>'.$token->[2]->{'from'}.
165: ':'.$token->[2]->{'to'};
166: if ($token->[2]->{'condition'}) {
167: $outstr.=':'.$token->[2]->{'condition'};
168: } else {
169: $outstr.=':0';
170: }
171: # ------------------------------------------------------------------- Parameter
172: } elsif ($token->[1] eq 'param') {
173: $outstr.='<&>objparms<:>'.$token->[2]->{'to'}.'<:>'.
174: $token->[2]->{'type'}.'___'.$token->[2]->{'name'}
175: .'___'.$token->[2]->{'value'};
176: } elsif ($graphmode) {
177: # --------------------------------------------- All other tags (graphical only)
178: $outstr.='<&>'.$token->[1];
179: if (defined($token->[2]->{'index'})) {
180: $outstr.='<:>'.$token->[2]->{'index'};
181: if ($token->[1] eq 'obj') {
182: $obj[$token->[2]->{'index'}]=2;
183: }
184: }
185: $outstr.='<:>'.$token->[2]->{'value'};
186: }
187: }
188: }
189:
190: } else {
191: $errtext.='Map not loaded: The file does not exist. ';
192: }
193: return($outstr,$errtext);
194: }
195:
196:
197: # ----------------------------------------------------------- Saves map to disk
198:
199: sub savemap {
200: my ($fn,$errtext)=@_;
201: my %alltypes;
202: my %allvalues;
203: if (($fn=~/\.sequence$/) ||
204: ($fn=~/\.page$/)) {
205:
206: # ------------------------------------------------------------- Deal with input
207: my @tags=split(/<&>/,$ENV{'form.output'});
208: my $outstr='';
209: my $graphdef=0;
210: if ($tags[0] eq 'graphdef<:>yes') {
211: $outstr='<map mode="rat/graphical">'."\n";
212: $graphdef=1;
213: } else {
214: $outstr="<map>\n";
215: }
216: map {
217: my @parts=split(/<:>/,$_);
218: if ($parts[0] eq 'objcont') {
219: my @comp=split(/:/,$parts[$#parts]);
220: # --------------------------------------------------------------- Logical input
221: if ($comp[$#comp] eq 'res') {
222: $comp[0]=qtescape($comp[0]);
223: $comp[1]=qtescape($comp[1]);
224: if ($comp[2] eq 'true') {
225: if ($comp[1]!~/^http\:\/\//) {
226: $comp[1]='http://'.$comp[1];
227: }
228: $comp[1].='" external="true';
229: } else {
230: if ($comp[1]=~/^http\:\/\//) {
231: $comp[1]=~s/^http\:\/\/[^\/]*\//\//;
232: }
233: }
234: $outstr.='<resource id="'.$parts[1].'" src="'
235: .$comp[1].'"';
236:
237: if (($comp[3] ne '') && ($comp[3] ne 'normal')) {
238: $outstr.=' type="'.$comp[3].'"';
239: }
240: if ($comp[0] ne '') {
241: $outstr.=' title="'.$comp[0].'"';
242: }
243: $outstr.="></resource>\n";
244: } elsif ($comp[$#comp] eq 'cond') {
245: $outstr.='<condition id="'.$parts[1].'"';
246: if (($comp[1] ne '') && ($comp[1] ne 'normal')) {
247: $outstr.=' type="'.$comp[1].'"';
248: }
249: $outstr.=' value="'.qtescape($comp[0]).'"';
250: $outstr.="></condition>\n";
251: }
252: } elsif ($parts[0] eq 'objlinks') {
253: my @comp=split(/:/,$parts[$#parts]);
254: $outstr.='<link';
255: $outstr.=' from="'.$comp[0].'"';
256: $outstr.=' to="'.$comp[1].'"';
257: if (($comp[2] ne '') && ($comp[2]!=0)) {
258: $outstr.=' condition="'.$comp[2].'"';
259: }
260: $outstr.=' index="'.$parts[1].'"';
261: $outstr.="></link>\n";
262: } elsif ($parts[0] eq 'objparms') {
263: undef %alltypes;
264: undef %allvalues;
265: map {
266: my ($type,$name,$value)=split(/\_\_\_/,$_);
267: $alltypes{$name}=$type;
268: $allvalues{$name}=$value;
269: } split(/:/,$parts[$#parts]);
270: map {
271: $outstr.='<param to="'.$parts[1].'" type="'
272: .$alltypes{$_}.'" name="'.$_
273: .'" value="'.$allvalues{$_}.'">'
274: ."</param>\n";
275: } keys %allvalues;
276: } elsif (($parts[0] ne '') && ($graphdef)) {
277: # ------------------------------------------------------------- Graphical input
278: $outstr.='<'.$parts[0];
279: if ($#parts==2) {
280: $outstr.=' index="'.$parts[1].'"';
281: }
282: $outstr.=' value="'.qtescape($parts[$#parts]).'"></'.
283: $parts[0].">\n";
284: }
285: } @tags;
286: $outstr.="</map>\n";
287: {
288: my $fh;
289: if ($fh=Apache::File->new(">$fn")) {
290: print $fh $outstr;
291: $errtext.="Map saved as $fn. ";
292: } else {
293: $errtext.='Could not write file $fn. Map not saved. ';
294: }
295: }
296: } else {
297: # -------------------------------------------- Cannot write to that file, error
298: $errtext.='Map not saved: The specified path does not exist. ';
299: }
300: return $errtext;
301: }
302:
303: # ================================================================ Main Handler
304:
305: sub handler {
306: my $r=shift;
307: $r->content_type('text/html');
308: $r->send_http_header;
309:
310: return OK if $r->header_only;
311:
312: my $url=$r->uri;
313: $url=~/\/(\w+)\/ratserver$/;
314: my $mode=$1;
315:
316: $url=~s/\/loadonly\/ratserver$/\/save\/ratserver/;
317:
318: my $fn=$r->filename;
319: my $errtext='';
320: my $outtext='';
321:
322: if ($mode ne 'loadonly') {
323: $errtext=&savemap($fn,$errtext);
324: }
325: ($outtext,$errtext)=&loadmap($fn,$errtext);
326:
327: $r->print(<<ENDDOCUMENT);
328: <html>
329: <body bgcolor="#FFFFFF">
330: <form name=storage method=post action="$url">
331: <input type=hidden name=output value="$outtext">
332: </form>
333: <script>
334: parent.flag=1;
335: </script>
336: ENDDOCUMENT
337: if ($errtext ne '') {
338: $r->print(<<ENDSCRIPT);
339: <script>
340: alert("$errtext");
341: </script>
342: ENDSCRIPT
343: }
344: $r->print("</body>\n</html>\n");
345:
346: return OK;
347: }
348:
349: 1;
350: __END__
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