1: # The LearningOnline Network with CAPA
2: # Server for RAT Maps
3: #
4: # (Edit Handler for RAT Maps
5: # (TeX Content Handler
6: #
7: # 05/29/00,05/30 Gerd Kortemeyer)
8: # 7/1 Gerd Kortemeyer)
9: # 7/1,7/3,7/4,7/7,7/8,7/10,7/26,10/2 Gerd Kortemeyer
10: # 4/30/2001 Scott Harrison
11: # 5/3,06/25,07/03,07/04 Gerd Kortemeyer
12:
13: package Apache::lonratsrv;
14:
15: use strict;
16: use Apache::Constants qw(:common);
17: use Apache::File;
18: use HTML::TokeParser;
19:
20:
21: # ------------------------------------------------------------- From RAT to XML
22:
23: sub qtescape {
24: my $str=shift;
25: $str=~s/\&\#58\;/\:/g;
26: $str=~s/\&\#39\;/\'/g;
27: $str=~s/\&\#44\;/\,/g;
28: $str=~s/\&\#34\;/\"/g;
29: return $str;
30: }
31:
32: # ------------------------------------------------------------- From XML to RAT
33:
34: sub qtunescape {
35: my $str=shift;
36: $str=~s/\:/\&colon\;/g;
37: $str=~s/\'/\&\#39\;/g;
38: $str=~s/\,/\&\#44\;/g;
39: $str=~s/\"/\&\#34\;/g;
40: return $str;
41: }
42:
43: # --------------------------------------------------------- Loads map from disk
44:
45: sub loadmap {
46: my ($fn,$errtext)=@_;
47: my $outstr='';
48: my @content=();
49: my @obj=();
50: my @links=();
51: if (-e $fn) {
52: {
53: my $fh=Apache::File->new($fn);
54: @content=<$fh>;
55: }
56: my $instr=join('',@content);
57: my $parser = HTML::TokeParser->new(\$instr);
58: my $token;
59: my $graphmode=0;
60:
61: $fn=~/\.(\w+)$/;
62: $outstr="mode<:>$1";
63:
64: while ($token = $parser->get_token) {
65: if ($token->[0] eq 'S') {
66: if ($token->[1] eq 'map') {
67: $graphmode=($token->[2]->{'mode'} eq 'rat/graphical');
68: } elsif ($token->[1] eq 'resource') {
69: # -------------------------------------------------------------------- Resource
70: $outstr.='<&>objcont';
71: if ($token->[2]->{'id'}) {
72: $outstr.='<:>'.$token->[2]->{'id'};
73: if ($obj[$token->[2]->{'id'}]==1) {
74: $errtext.='Error: multiple use of ID '.
75: $token->[2]->{'id'}.'. ';
76: }
77: $obj[$token->[2]->{'id'}]=1;
78: } else {
79: my $i=1;
80: while (($i<=$#obj) && ($obj[$i]!=0)) { $i++; }
81: $outstr.='<:>'.$i;
82: $obj[$i]=1;
83: }
84: $outstr.='<:>';
85: $outstr.=qtunescape($token->[2]->{'title'}).":";
86: $outstr.=qtunescape($token->[2]->{'src'}).":";
87: if ($token->[2]->{'external'} eq 'true') {
88: $outstr.='true:';
89: } else {
90: $outstr.='false:';
91: }
92: if ($token->[2]->{'type'}) {
93: $outstr.=$token->[2]->{'type'}.':';
94: } else {
95: $outstr.='normal:';
96: }
97: $outstr.='res';
98: } elsif ($token->[1] eq 'condition') {
99: # ------------------------------------------------------------------- Condition
100: $outstr.='<&>objcont';
101: if ($token->[2]->{'id'}) {
102: $outstr.='<:>'.$token->[2]->{'id'};
103: if ($obj[$token->[2]->{'id'}]==1) {
104: $errtext.='Error: multiple use of ID '.
105: $token->[2]->{'id'}.'. ';
106: }
107: $obj[$token->[2]->{'id'}]=1;
108: } else {
109: my $i=1;
110: while (($i<=$#obj) && ($obj[$i]!=0)) { $i++; }
111: $outstr.='<:>'.$i;
112: $obj[$i]=1;
113: }
114: $outstr.='<:>';
115: $outstr.=qtunescape($token->[2]->{'value'}).':';
116: if ($token->[2]->{'type'}) {
117: $outstr.=$token->[2]->{'type'}.':';
118: } else {
119: $outstr.='normal:';
120: }
121: $outstr.='cond';
122: } elsif ($token->[1] eq 'link') {
123: # ----------------------------------------------------------------------- Links
124: $outstr.='<&>objlinks';
125:
126: if ($token->[2]->{'index'}) {
127: if ($links[$token->[2]->{'index'}]) {
128: $errtext.='Error: multiple use of link index '.
129: $token->[2]->{'index'}.'. ';
130: }
131: $outstr.='<:>'.$token->[2]->{'index'};
132: $links[$token->[2]->{'index'}]=1;
133: } else {
134: my $i=1;
135: while (($i<=$#links) && ($links[$i]==1)) { $i++; }
136: $outstr.='<:>'.$i;
137: $links[$i]=1;
138: }
139:
140: $outstr.='<:>'.$token->[2]->{'from'}.
141: ':'.$token->[2]->{'to'};
142: if ($token->[2]->{'condition'}) {
143: $outstr.=':'.$token->[2]->{'condition'};
144: } else {
145: $outstr.=':0';
146: }
147: # ------------------------------------------------------------------- Parameter
148: } elsif ($token->[1] eq 'param') {
149: $outstr.='<&>objparms<:>'.$token->[2]->{'to'}.'<:>'.
150: $token->[2]->{'type'}.'___'.$token->[2]->{'name'}
151: .'___'.$token->[2]->{'value'};
152: } elsif ($graphmode) {
153: # --------------------------------------------- All other tags (graphical only)
154: $outstr.='<&>'.$token->[1];
155: if (defined($token->[2]->{'index'})) {
156: $outstr.='<:>'.$token->[2]->{'index'};
157: if ($token->[1] eq 'obj') {
158: $obj[$token->[2]->{'index'}]=2;
159: }
160: }
161: $outstr.='<:>'.$token->[2]->{'value'};
162: }
163: }
164: }
165:
166: } else {
167: $errtext.='Map not loaded: The file does not exist. ';
168: }
169: return($outstr,$errtext);
170: }
171:
172:
173: # ----------------------------------------------------------- Saves map to disk
174:
175: sub savemap {
176: my ($fn,$errtext)=@_;
177: my %alltypes;
178: my %allvalues;
179: if (($fn=~/\.sequence$/) ||
180: ($fn=~/\.page$/)) {
181:
182: # ------------------------------------------------------------- Deal with input
183: my @tags=split(/<&>/,$ENV{'form.output'});
184: my $outstr='';
185: my $graphdef=0;
186: if ($tags[0] eq 'graphdef<:>yes') {
187: $outstr='<map mode="rat/graphical">'."\n";
188: $graphdef=1;
189: } else {
190: $outstr="<map>\n";
191: }
192: map {
193: my @parts=split(/<:>/,$_);
194: if ($parts[0] eq 'objcont') {
195: my @comp=split(/:/,$parts[$#parts]);
196: # --------------------------------------------------------------- Logical input
197: if ($comp[$#comp] eq 'res') {
198: $comp[0]=qtescape($comp[0]);
199: $comp[1]=qtescape($comp[1]);
200: if ($comp[2] eq 'true') {
201: if ($comp[1]!~/^http\:\/\//) {
202: $comp[1]='http://'.$comp[1];
203: }
204: $comp[1].='" external="true';
205: } else {
206: if ($comp[1]=~/^http\:\/\//) {
207: $comp[1]=~s/^http\:\/\/[^\/]*\//\//;
208: }
209: }
210: $outstr.='<resource id="'.$parts[1].'" src="'
211: .$comp[1].'"';
212:
213: if (($comp[3] ne '') && ($comp[3] ne 'normal')) {
214: $outstr.=' type="'.$comp[3].'"';
215: }
216: if ($comp[0] ne '') {
217: $outstr.=' title="'.$comp[0].'"';
218: }
219: $outstr.="></resource>\n";
220: } elsif ($comp[$#comp] eq 'cond') {
221: $outstr.='<condition id="'.$parts[1].'"';
222: if (($comp[1] ne '') && ($comp[1] ne 'normal')) {
223: $outstr.=' type="'.$comp[1].'"';
224: }
225: $outstr.=' value="'.qtescape($comp[0]).'"';
226: $outstr.="></condition>\n";
227: }
228: } elsif ($parts[0] eq 'objlinks') {
229: my @comp=split(/:/,$parts[$#parts]);
230: $outstr.='<link';
231: $outstr.=' from="'.$comp[0].'"';
232: $outstr.=' to="'.$comp[1].'"';
233: if (($comp[2] ne '') && ($comp[2]!=0)) {
234: $outstr.=' condition="'.$comp[2].'"';
235: }
236: $outstr.=' index="'.$parts[1].'"';
237: $outstr.="></link>\n";
238: } elsif ($parts[0] eq 'objparms') {
239: undef %alltypes;
240: undef %allvalues;
241: map {
242: my ($type,$name,$value)=split(/\_\_\_/,$_);
243: $alltypes{$name}=$type;
244: $allvalues{$name}=$value;
245: } split(/:/,$parts[$#parts]);
246: map {
247: $outstr.='<param to="'.$parts[1].'" type="'
248: .$alltypes{$_}.'" name="'.$_
249: .'" value="'.$allvalues{$_}.'">'
250: ."</param>\n";
251: } keys %allvalues;
252: } elsif (($parts[0] ne '') && ($graphdef)) {
253: # ------------------------------------------------------------- Graphical input
254: $outstr.='<'.$parts[0];
255: if ($#parts==2) {
256: $outstr.=' index="'.$parts[1].'"';
257: }
258: $outstr.=' value="'.qtescape($parts[$#parts]).'"></'.
259: $parts[0].">\n";
260: }
261: } @tags;
262: $outstr.="</map>\n";
263: {
264: my $fh;
265: if ($fh=Apache::File->new(">$fn")) {
266: print $fh $outstr;
267: $errtext.="Map saved as $fn. ";
268: } else {
269: $errtext.='Could not write file $fn. Map not saved. ';
270: }
271: }
272: } else {
273: # -------------------------------------------- Cannot write to that file, error
274: $errtext.='Map not saved: The specified path does not exist. ';
275: }
276: return $errtext;
277: }
278:
279: # ================================================================ Main Handler
280:
281: sub handler {
282: my $r=shift;
283: $r->content_type('text/html');
284: $r->send_http_header;
285:
286: return OK if $r->header_only;
287:
288: my $url=$r->uri;
289: $url=~/\/(\w+)\/ratserver$/;
290: my $mode=$1;
291:
292: $url=~s/\/loadonly\/ratserver$/\/save\/ratserver/;
293:
294: my $fn=$r->filename;
295: my $errtext='';
296: my $outtext='';
297:
298: if ($mode ne 'loadonly') {
299: $errtext=&savemap($fn,$errtext);
300: }
301: ($outtext,$errtext)=&loadmap($fn,$errtext);
302:
303: $r->print(<<ENDDOCUMENT);
304: <html>
305: <body bgcolor="#FFFFFF">
306: <form name=storage method=post action="$url">
307: <input type=hidden name=output value="$outtext">
308: </form>
309: <script>
310: parent.flag=1;
311: </script>
312: ENDDOCUMENT
313: if ($errtext ne '') {
314: $r->print(<<ENDSCRIPT);
315: <script>
316: alert("$errtext");
317: </script>
318: ENDSCRIPT
319: }
320: $r->print("</body>\n</html>\n");
321:
322: return OK;
323: }
324:
325: 1;
326: __END__
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