1: # The LearningOnline Network with CAPA
2: # Edit Handler for RAT Maps
3: #
4: # $Id: lonratedt.pm,v 1.10 2002/05/11 23:23:01 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: # (TeX Content Handler
29: #
30: # 05/29/00,05/30 Gerd Kortemeyer)
31: # 7/1,6/30 Gerd Kortemeyer
32:
33: package Apache::lonratedt;
34:
35: use strict;
36: use Apache::Constants qw(:common);
37: use Apache::lonnet;
38: use Apache::lonratsrv;
39:
40: my @order=();
41: my @resources=();
42:
43:
44: # Mapread read maps into global arrays @links and @resources, determines status
45: # sets @order - pointer to resources in right order
46: # sets @resources - array with the resources with correct idx
47: #
48: sub mapread {
49: my $fn=shift;
50:
51: my @links;
52: undef @links;
53: undef @resources;
54: undef @order;
55:
56: my ($outtext,$errtext)=&Apache::lonratsrv::loadmap($fn,'');
57: if ($errtext) { return ($errtext,2); }
58:
59: # -------------------------------------------------------------------- Read map
60: foreach (split(/\<\&\>/,$outtext)) {
61: my ($command,$number,$content)=split(/\<\:\>/,$_);
62: if ($command eq 'objcont') {
63: $resources[$number]=$content;
64: }
65: if ($command eq 'objlinks') {
66: $links[$number]=$content;
67: }
68: }
69: # ------------------------------------------------------- Is this a linear map?
70: my @starters=();
71: my @endings=();
72: undef @starters;
73: undef @endings;
74:
75: foreach (@links) {
76: if (defined($_)) {
77: my ($start,$end,$cond)=split(/\:/,$_);
78: if ((defined($starters[$start])) || (defined($endings[$end]))) {
79: return
80: ('Map has branchings. Use advanced editor.',1);
81: }
82: $starters[$start]=1;
83: $endings[$end]=1;
84: if ($cond) {
85: return
86: ('Map has conditions. Use advanced editor.',1);
87: }
88: }
89:
90: }
91: for (my $i=0; $i<=$#resources; $i++) {
92: if (defined($resources[$i])) {
93: unless (($starters[$i]) || ($endings[$i])) {
94: return
95: ('Map has unconnected resources. Use advanced editor.',1);
96: }
97: }
98: }
99:
100: # -------------------------------------------------- This is a linear map, sort
101:
102: my $startidx=0;
103: my $endidx=0;
104: for (my $i=0; $i<=$#resources; $i++) {
105: if (defined($resources[$i])) {
106: my ($title,$url,$ext,$type)=split(/\:/,$resources[$i]);
107: if ($type eq 'start') { $startidx=$i; }
108: if ($type eq 'finish') { $endidx=$i; }
109: }
110: }
111: my $k=0;
112: my $currentidx=$startidx;
113: $order[$k]=$currentidx;
114: for (my $i=0; $i<=$#resources; $i++) {
115: foreach (@links) {
116: my ($start,$end)=split(/\:/,$_);
117: if ($start==$currentidx) {
118: $currentidx=$end;
119: $k++;
120: $order[$k]=$currentidx;
121: last;
122: }
123: }
124: if ($currentidx==$endidx) { last; }
125: }
126: return $errtext;
127: }
128:
129: # --------------------------------------------------------- Build up RAT screen
130: sub ratedt {
131: my ($r,$url)=@_;
132: $r->print(<<ENDDOCUMENT);
133:
134: <html>
135: <head>
136: <script language="JavaScript">
137: var flag=0;
138: </script>
139: </head>
140: <frameset rows="1,50,*" border=0>
141: <frame name=server src="$url/loadonly/ratserver" noresize noscroll>
142: <frame name=code src="/adm/rat/code.html">
143: <frame name=mapout src="/adm/rat/map.html">
144: </frameset>
145: </html>
146:
147: ENDDOCUMENT
148: }
149:
150: # ---------------------------------------------------------------- Make buttons
151:
152: sub buttons {
153: my $adv=shift;
154: my $output='<form method=post>';
155: if ($adv==1) {
156: $output.='<input type=submit name=forceadv value="Edit">';
157: } else {
158: unless ($adv==2) {
159: $output.='<input type=submit name=forcesmp value="Simple Edit">';
160: }
161: $output.='<input type=submit name=forceadv value="Advanced Edit">';
162: }
163: return $output.'</form><hr>';
164: }
165:
166: sub smpedt {
167: my ($r,$errtext)=@_;
168: my $buttons=&buttons(2);
169: # ----------------------------------------------------- Start simple RAT screen
170: $r->print(<<ENDSMPHEAD);
171: <html>
172: <head>
173: <script>
174: var srch;
175: var srchflag=-1; // 1 means currently open
176: // 0 means closed (but has been open)
177: // -1 means never yet opened/defined
178: var srchmode='';
179:
180: var idx;
181: var idxflag=-1; // 1 means currently open
182: // 0 means closed (but has been open)
183: // -1 means never yet opened/defined
184: var idxmode='';
185:
186: // ------------------------------------------------------ Clears indexer window
187: function idxclear() {
188: idx.document.clear();
189: }
190:
191: // ------------------------------------------------------- Clears search window
192: function srchclear() {
193: srch.document.clear();
194: }
195:
196: // ------------------------------------------------------ Closes indexer window
197: function idxclose() {
198: if (idx && !idx.closed) {
199: idxflag=0;
200: idx.close();
201: }
202: }
203:
204: // ------------------------------------------------------- Closes search window
205: function srchclose() {
206: if (srch && !srch.closed) {
207: srchflag=0;
208: srch.close();
209: }
210: }
211:
212: // -------------------------------------------------------- Open indexer window
213: function idxopen(mode) {
214: var options="scrollbars=1,resizable=1,menubar=0";
215: idxmode=mode;
216: idxflag=1;
217: idx=open("/res/?launch=1&mode=simple&catalogmode="+mode,"idxout",options);
218: idx.focus();
219: }
220:
221: // --------------------------------------------------------- Open search window
222: function srchopen(mode) {
223: var options="scrollbars=1,resizable=1,menubar=0";
224: srchmode=mode;
225: srchflag=1;
226: srch=open("/adm/searchcat?launch=1&mode=simple&catalogmode="+mode,"srchout",options);
227: srch.focus();
228: }
229: // ----------------------------------------------------- launch indexer browser
230: function groupsearch() {
231: srchcheck('groupsearch');
232: }
233:
234: function groupimport() {
235: idxcheck('groupimport');
236: }
237: // ------------------------------------------------------- Do srch status check
238: function srchcheck(mode) {
239: if (!srch || srch.closed || srchmode!=mode) {
240: srchopen(mode);
241: }
242: srch.focus();
243: }
244:
245: // -------------------------------------------------------- Do idx status check
246: function idxcheck(mode) {
247: if (!idx || idx.closed || idxmode!=mode) {
248: idxopen(mode);
249: }
250: idx.focus();
251: }
252: </script>
253: </head>
254: <body bgcolor='#FFFFFF'>
255: $buttons
256: <font color=red>$errtext</font>
257: <a href="javascript:groupsearch()">Group Search</a>
258: <a href="javascript:groupimport()">Group Import</a>
259:
260: ENDSMPHEAD
261:
262: $r->print(
263: '<input type=submit name=forcesmp value="Store"></form></body></html>');
264: }
265:
266: sub nodir {
267: my ($r,$dir)=@_;
268: $dir=~s/^\/home\/\w+\/public\_html//;
269: $r->print(<<ENDNODIR);
270: <html>
271: <body bgcolor='#FFFFFF'>
272: <h1>No such directory: $dir</h1>
273: </body>
274: </html>
275: ENDNODIR
276: }
277:
278: # ---------------------------------------------------------------- View Handler
279:
280: sub viewmap {
281: my ($r,$adv,$errtext)=@_;
282: $r->print('<html><body bgcolor="#FFFFFF">'.&buttons($adv));
283: if ($errtext) {
284: $r->print($errtext.'<hr>');
285: }
286: foreach (@resources) {
287: if (defined($_)) {
288: my ($title,$url)=split(/\:/,$_);
289: $title=~s/\&colon\;/\:/g;
290: $url=~s/\&colon\;/\:/g;
291: unless ($title) { $title='<i>Unknown</i>'; }
292: if ($url) {
293: $r->print('<a href="'.&Apache::lonratsrv::qtescape($url).'">');
294: }
295: $r->print(&Apache::lonratsrv::qtescape($title));
296: if ($url) { $r->print('</a>'); }
297: $r->print('<br>');
298: }
299: }
300: $r->print('</body></html>');
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: my $fn=&Apache::lonnet::filelocation('',$url);
314:
315: my ($dir)=($fn=~/^(.+)\/[^\/]+$/);
316: unless (-e $dir) {
317: &nodir($r,$dir);
318: return OK;
319: }
320:
321: # ------------------------------------------- Determine which tools can be used
322: my $adv=0;
323:
324: unless ($ENV{'form.forcesmp'}) {
325: if ($ENV{'form.forceadv'}) {
326: $adv=1;
327: } elsif (my $fh=Apache::File->new($fn)) {
328: my $allmap=join('',<$fh>);
329: $adv=($allmap=~/\<map[^\>]+mode\s*\=\s*(\'|\")rat/is);
330: }
331: }
332:
333: my $errtext='';
334: my $fatal=0;
335:
336: # -------------------------------------------------------------------- Load map
337: ($errtext,$fatal)=&mapread($fn,$errtext);
338:
339: if ($fatal==1) { $adv=1; }
340:
341: # ----------------------------------- adv==1 now means "graphical MUST be used"
342:
343: if ($ENV{'form.forceadv'}) {
344: &ratedt($r,$url);
345: } elsif ($ENV{'form.forcesmp'}) {
346: &smpedt($r,$errtext);
347: } else {
348: &viewmap($r,$adv,$errtext);
349: }
350: return OK;
351: }
352:
353: 1;
354: __END__
355:
356:
357:
358:
359:
360:
361:
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