1: # The LearningOnline Network with CAPA
2: # Edit Handler for RAT Maps
3: #
4: # $Id: lonratedt.pm,v 1.16 2002/05/14 15:19:13 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: # ---------------------------------------------- Read a map as well as possible
130:
131: sub attemptread {
132: my $fn=shift;
133:
134: my @links;
135: undef @links;
136: my @theseres;
137: undef @theseres;
138:
139: my ($outtext,$errtext)=&Apache::lonratsrv::loadmap($fn,'');
140: if ($errtext) { return @theseres }
141:
142: # -------------------------------------------------------------------- Read map
143: foreach (split(/\<\&\>/,$outtext)) {
144: my ($command,$number,$content)=split(/\<\:\>/,$_);
145: if ($command eq 'objcont') {
146: $theseres[$number]=$content;
147: }
148: if ($command eq 'objlinks') {
149: $links[$number]=$content;
150: }
151: }
152:
153: # --------------------------------------------------------------- Sort, sort of
154:
155: my $startidx=0;
156: my $endidx=0;
157: for (my $i=0; $i<=$#theseres; $i++) {
158: if (defined($theseres[$i])) {
159: my ($title,$url,$ext,$type)=split(/\:/,$theseres[$i]);
160: if ($type eq 'start') { $startidx=$i; }
161: if ($type eq 'finish') { $endidx=$i; }
162: }
163: }
164:
165:
166: return @theseres;
167:
168: }
169:
170:
171: # --------------------------------------------------------- Build up RAT screen
172: sub ratedt {
173: my ($r,$url)=@_;
174: $r->print(<<ENDDOCUMENT);
175:
176: <html>
177: <head>
178: <script language="JavaScript">
179: var flag=0;
180: </script>
181: </head>
182: <frameset rows="1,50,*" border=0>
183: <frame name=server src="$url/loadonly/ratserver" noresize noscroll>
184: <frame name=code src="/adm/rat/code.html">
185: <frame name=mapout src="/adm/rat/map.html">
186: </frameset>
187: </html>
188:
189: ENDDOCUMENT
190: }
191:
192: # ---------------------------------------------------------------- Make buttons
193:
194: sub buttons {
195: my $adv=shift;
196: my $output='<form method=post>';
197: if ($adv==1) {
198: $output.='<input type=submit name=forceadv value="Edit">';
199: } else {
200: unless ($adv==2) {
201: $output.='<input type=submit name=forcesmp value="Simple Edit">';
202: }
203: $output.='<input type=submit name=forceadv value="Advanced Edit">';
204: }
205: return $output.'</form><hr>';
206: }
207:
208: sub smpedt {
209: my ($r,$errtext)=@_;
210: my $buttons=&buttons(2);
211:
212: # ---------------------------------------------------------- Process form input
213:
214: my @importselect=();
215: my @targetselect=();
216: undef @importselect;
217: undef @targetselect;
218: if (defined($ENV{'form.import'})) {
219: if (ref($ENV{'form.import'})) {
220: @importselect=sort($ENV->{'form.import'});
221: } else {
222: @importselect=($ENV{'form.import'});
223: }
224: }
225: if (defined($ENV{'form.target'})) {
226: if (ref($ENV{'form.target'})) {
227: @targetselect=sort($ENV->{'form.target'});
228: } else {
229: @targetselect=($ENV{'form.target'});
230: }
231: }
232: # ============================================================ Process commands
233:
234: my $targetdetail=$ENV{'form.targetdetail'};
235: my $importdetail=$ENV{'form.curimpdetail'};
236:
237: # ---------------------------------------------------- Importing from groupsort
238: if (($ENV{'form.importdetail'}) && (!$ENV{'form.impfortarget'})) {
239:
240: $importdetail='';
241: my @curimport=split(/\&/,$ENV{'form.curimpdetail'});
242:
243: my $lastsel;
244:
245: if (defined($importselect[-1])) {
246: $lastsel=$importselect[-1];
247: } else {
248: $lastsel=$#curimport;
249: }
250:
251: for (my $i=0;$i<=$lastsel;$i++) {
252: my ($name,$url)=split(/\=/,$curimport[$i]);
253: if ($url) {
254: $importdetail.='&'.&Apache::lonnet::escape($name).'='.
255: &Apache::lonnet::escape($url);
256: }
257: }
258:
259: $importdetail.='&'.$ENV{'form.importdetail'};
260:
261: for (my $i=$lastsel+1;$i<=$#curimport;$i++) {
262: my ($name,$url)=split(/\=/,$curimport[$i]);
263: if ($url) {
264: $importdetail.='&'.&Apache::lonnet::escape($name).'='.
265: &Apache::lonnet::escape($url);
266: }
267: }
268: $importdetail=~s/\&+/\&/g;
269: $importdetail=~s/^\&//;
270:
271: # ------------------------------------------------------------------- Clear all
272: } elsif ($ENV{'form.clear'}) {
273: $importdetail='';
274: # ------------------------------------------------------------ Discard selected
275: } elsif ($ENV{'form.discard'}) {
276: $importdetail='';
277: my @curimport=split(/\&/,$ENV{'form.curimpdetail'});
278: foreach (@importselect) {
279: $curimport[$_]='';
280: }
281: for (my $i=0;$i<=$#curimport;$i++) {
282: my ($name,$url)=split(/\=/,$curimport[$i]);
283: if ($url) {
284: $importdetail.='&'.&Apache::lonnet::escape($name).'='.
285: &Apache::lonnet::escape($url);
286: }
287: }
288: # ---------------------------
289: }
290:
291: # ------------------------------------------------------------ Assemble windows
292:
293: my $idx=-1;
294: my $importwindow=join("\n",map {
295: $idx++;
296: if ($_) {
297: my ($name,$url)=split(/\=/,$_);
298: unless ($name) { $name=(split(/\//,$url))[-1]; }
299: unless ($name) { $name='EMPTY'; }
300: '<option value="'.$idx.'">'.&Apache::lonnet::unescape($name).
301: '</option>';
302: }
303: } split(/\&/,$importdetail));
304:
305: $idx=0;
306: my $targetwindow=join("\n",map {
307: my ($name,$url)=split(/\:/,$resources[$_]);
308: unless ($name) { $name=(split(/\//,$url))[-1]; }
309: unless ($name) { $name='EMPTY'; }
310: $targetdetail.='&'.&Apache::lonnet::escape($name).'='.
311: &Apache::lonnet::escape($url);
312: $idx++;
313: '<option value="'.$idx.'_'.$_.'">'.$name.'</option>';
314: } @order);
315:
316: # ----------------------------------------------------- Start simple RAT screen
317: $r->print(<<ENDSMPHEAD);
318: <html>
319: <head>
320: <script>
321: var srch;
322: var srchflag=-1; // 1 means currently open
323: // 0 means closed (but has been open)
324: // -1 means never yet opened/defined
325: var srchmode='';
326:
327: var idx;
328: var idxflag=-1; // 1 means currently open
329: // 0 means closed (but has been open)
330: // -1 means never yet opened/defined
331: var idxmode='';
332:
333: // ------------------------------------------------------ Clears indexer window
334: function idxclear() {
335: idx.document.clear();
336: }
337:
338: // ------------------------------------------------------- Clears search window
339: function srchclear() {
340: srch.document.clear();
341: }
342:
343: // ------------------------------------------------------ Closes indexer window
344: function idxclose() {
345: if (idx && !idx.closed) {
346: idxflag=0;
347: idx.close();
348: }
349: }
350:
351: // ------------------------------------------------------- Closes search window
352: function srchclose() {
353: if (srch && !srch.closed) {
354: srchflag=0;
355: srch.close();
356: }
357: }
358:
359: // -------------------------------------------------------- Open indexer window
360: function idxopen(mode) {
361: var options="scrollbars=1,resizable=1,menubar=0";
362: idxmode=mode;
363: idxflag=1;
364: idx=open("/res/?launch=1&mode=simple&catalogmode="+mode,"idxout",options);
365: idx.focus();
366: }
367:
368: // --------------------------------------------------------- Open search window
369: function srchopen(mode) {
370: var options="scrollbars=1,resizable=1,menubar=0";
371: srchmode=mode;
372: srchflag=1;
373: srch=open("/adm/searchcat?launch=1&mode=simple&catalogmode="+mode,"srchout",options);
374: srch.focus();
375: }
376: // ----------------------------------------------------- launch indexer browser
377: function groupsearch() {
378: srchcheck('groupsearch');
379: }
380:
381: function groupimport() {
382: idxcheck('groupimport');
383: }
384: // ------------------------------------------------------- Do srch status check
385: function srchcheck(mode) {
386: if (!srch || srch.closed || srchmode!=mode) {
387: srchopen(mode);
388: }
389: srch.focus();
390: }
391:
392: // -------------------------------------------------------- Do idx status check
393: function idxcheck(mode) {
394: if (!idx || idx.closed || idxmode!=mode) {
395: idxopen(mode);
396: }
397: idx.focus();
398: }
399:
400:
401: var editbrowser;
402: function openbrowser(formname,elementname,only,omit) {
403: var url = '/res/?';
404: if (editbrowser == null) {
405: url += 'launch=1&';
406: }
407: url += 'catalogmode=interactive&';
408: url += 'mode=edit&';
409: url += 'form=' + formname + '&';
410: if (only != null) {
411: url += 'only=' + only + '&';
412: }
413: if (omit != null) {
414: url += 'omit=' + omit + '&';
415: }
416: url += 'element=' + elementname + '';
417: var title = 'Browser';
418: var options = 'scrollbars=1,resizable=1,menubar=0';
419: options += ',width=700,height=600';
420: editbrowser = open(url,title,options,'1');
421: editbrowser.focus();
422: }
423: </script>
424: </head>
425: <body bgcolor='#FFFFFF'>
426: $buttons
427: <font color=red>$errtext</font>
428: <form name=simpleedit method=post>
429: <input type=hidden name=forcesmp value=1>
430: <table>
431: <tr><th width="40%">Import</th>
432: <th> </th>
433: <th width="40%">Target</th></tr>
434: <tr><td bgcolor="#FFFFCC">
435: <input type=button onClick="javascript:groupsearch()" value="Group Search">
436: <input type=button onClick="javascript:groupimport();" value="Group Import">
437: after selected
438: <hr>
439: <input type=text size=20 name=importmap>
440: <input type=button
441: onClick="javascript:openbrowser('simpleedit','importmap','sequence,page','')"
442: value="Browse"><input type=submit name=loadmap value="Load Map"><hr>
443: <input type=submit name="discard" value="Discard Selected">
444: <input type=submit name="clear" value="Clear All">
445: <input type=button onClick="javascript:viewimport()" value="View">
446:
447: </td><td> </td><td bgcolor="#FFFFCC">
448:
449: <input type=button onClick=
450: "javascript:impfortarget.value=1;groupsearch()" value="Group Search">
451: <input type=button onClick=
452: "javascript:impfortarget.value=1;groupimport();" value="Group Import">
453: after selected
454: <hr><input type=button onClick="javascript:viewtarget()" value="View">
455: </td></tr>
456:
457: <tr><td bgcolor="#FFFFCC"><select name="import" multiple>
458: $importwindow
459: </select>
460: </td>
461: <td bgcolor="#FFFFAA" align="center">
462: Cut selected<br>
463: <input type=submit name=cut value='<<<'><p>
464: <hr>
465: Paste after selected<br>
466: <input type=submit name=paste value='>>>'>
467: </td>
468: <td bgcolor="#FFFFCC"><select name="target" multiple>
469: $targetwindow
470: </select>
471: </table>
472: <input type=hidden name=importdetail value="">
473: <input type=hidden name=curimpdetail value="$importdetail">
474: <input type=hidden name=targetdetail value="$targetdetail">
475: <input type=hidden name=impfortarget value="0">
476: </form>
477: </body></html>
478: ENDSMPHEAD
479: }
480:
481: # ----------------------------------------------------------------- No such dir
482: sub nodir {
483: my ($r,$dir)=@_;
484: $dir=~s/^\/home\/\w+\/public\_html//;
485: $r->print(<<ENDNODIR);
486: <html>
487: <body bgcolor='#FFFFFF'>
488: <h1>No such directory: $dir</h1>
489: </body>
490: </html>
491: ENDNODIR
492: }
493:
494: # ---------------------------------------------------------------- View Handler
495:
496: sub viewmap {
497: my ($r,$adv,$errtext)=@_;
498: $r->print('<html><body bgcolor="#FFFFFF">'.&buttons($adv));
499: if ($errtext) {
500: $r->print($errtext.'<hr>');
501: }
502: foreach (@resources) {
503: if (defined($_)) {
504: my ($title,$url)=split(/\:/,$_);
505: $title=~s/\&colon\;/\:/g;
506: $url=~s/\&colon\;/\:/g;
507: unless ($title) { $title=(split(/\//,$url))[-1] };
508: unless ($title) { $title='<i>Empty</i>'; }
509: if ($url) {
510: $r->print('<a href="'.&Apache::lonratsrv::qtescape($url).'">');
511: }
512: $r->print(&Apache::lonratsrv::qtescape($title));
513: if ($url) { $r->print('</a>'); }
514: $r->print('<br>');
515: }
516: }
517: $r->print('</body></html>');
518: }
519:
520: # ================================================================ Main Handler
521:
522: sub handler {
523: my $r=shift;
524: $r->content_type('text/html');
525: $r->send_http_header;
526:
527: return OK if $r->header_only;
528:
529: my $url=$r->uri;
530: my $fn=&Apache::lonnet::filelocation('',$url);
531:
532: my ($dir)=($fn=~/^(.+)\/[^\/]+$/);
533: unless (-e $dir) {
534: &nodir($r,$dir);
535: return OK;
536: }
537:
538: # ------------------------------------------- Determine which tools can be used
539: my $adv=0;
540:
541: unless ($ENV{'form.forcesmp'}) {
542: if ($ENV{'form.forceadv'}) {
543: $adv=1;
544: } elsif (my $fh=Apache::File->new($fn)) {
545: my $allmap=join('',<$fh>);
546: $adv=($allmap=~/\<map[^\>]+mode\s*\=\s*(\'|\")rat/is);
547: }
548: }
549:
550: my $errtext='';
551: my $fatal=0;
552:
553: # -------------------------------------------------------------------- Load map
554: ($errtext,$fatal)=&mapread($fn,$errtext);
555:
556: if ($fatal==1) { $adv=1; }
557:
558: # ----------------------------------- adv==1 now means "graphical MUST be used"
559:
560: if ($ENV{'form.forceadv'}) {
561: &ratedt($r,$url);
562: } elsif ($ENV{'form.forcesmp'}) {
563: &smpedt($r,$errtext);
564: } else {
565: &viewmap($r,$adv,$errtext);
566: }
567: return OK;
568: }
569:
570: 1;
571: __END__
572:
573:
574:
575:
576:
577:
578:
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