1: # The LearningOnline Network with CAPA
2: # The LON-CAPA group sort handler
3: # Allows for sorting prior to import into RAT.
4: #
5: # $Id: groupsort.pm,v 1.53 2007/07/06 08:34:37 albertel Exp $
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: #
29: ###
30:
31: package Apache::groupsort;
32:
33: use strict;
34:
35: use Apache::Constants qw(:common);
36: use GDBM_File;
37: use Apache::loncommon;
38: use Apache::lonlocal;
39: use Apache::lonnet;
40: use LONCAPA();
41:
42: my $iconpath; # variable to be accessible to multiple subroutines
43: my %hash; # variable to tie to user specific database
44:
45:
46: sub readfromdb {
47: my ($r,$shash,$thash)=@_;
48:
49: my $diropendb =
50: "/home/httpd/perl/tmp/$env{'user.domain'}_$env{'user.name'}_sel_res.db";
51:
52: # ----------------------------- diropendb is now the filename of the db to open
53: if (tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) {
54: my $acts = $env{'form.acts'};
55: my @Acts = split(/b/,$acts);
56: my %ahash;
57: my %achash;
58: my $ac = 0;
59: foreach (@Acts) {
60: my ($state,$ref) = split(/a/);
61: $ahash{$ref} = $state;
62: $achash{$ref} = $ac;
63: $ac++;
64: }
65: foreach (sort {$achash{$a} <=> $achash{$b}} (keys %ahash)) {
66: my $key = $_;
67: if ($ahash{$key} eq '1') {
68: if ($hash{'pre_'.$key.'_title'} eq 'Not_retrieved') {
69: $hash{'pre_'.$key.'_title'} = &Apache::lonnet::gettitle($hash{'pre_'.$key.'_link'});
70: }
71: $hash{'store_'.$hash{'pre_'.$key.'_link'}} =
72: $hash{'pre_'.$key.'_title'};
73: $hash{'storectr_'.$hash{'pre_'.$key.'_link'}} =
74: $hash{'storectr'}+0;
75: $hash{'storectr'}++;
76: }
77: if ($ahash{$key} eq '0') {
78: if ($hash{'store_'.$hash{'pre_'.$key.'_link'}}) {
79: delete $hash{'store_'.$hash{'pre_'.$key.'_link'}};
80: }
81: }
82: }
83: foreach (keys %hash) {
84: if ($_ =~ /^store_/) {
85: my $key = $_;
86: $key =~ s/^store_//;
87: $$shash{$key} = $hash{'storectr_'.$key};
88: if (&Apache::lonnet::gettitle($key) eq '') {
89: $$thash{$key} = $hash{'store_'.$key};
90: } else {
91: $$thash{$key} = &Apache::lonnet::gettitle($key);
92: }
93: }
94: }
95: if ($env{'form.oldval'}) {
96: my $newctr = 0;
97: my %chash;
98: foreach (sort {$$shash{$a} <=> $$shash{$b}} (keys %{$shash})) {
99: my $key = $_;
100: $newctr++;
101: $$shash{$key} = $newctr;
102: $hash{'storectr_'.$key} = $newctr;
103: $chash{$newctr} = $key;
104: }
105: my $oldval = $env{'form.oldval'};
106: my $newval = $env{'form.newval'};
107: if ($oldval != $newval) {
108: # when newval==0, then push down and delete
109: if ($newval!=0) {
110: $$shash{$chash{$oldval}} = $newval;
111: $hash{'storectr_'.$chash{$oldval}} = $newval;
112: } else {
113: $$shash{$chash{$oldval}} = $newctr;
114: $hash{'storectr_'.$chash{$oldval}} = $newctr;
115: }
116: if ($newval==0) { # push down
117: my $newval2=$newctr;
118: for my $idx ($oldval..($newval2-1)) {
119: $$shash{$chash{$idx+1}} = $idx;
120: $hash{'storectr_'.$chash{$idx+1}} = $idx;
121: }
122: delete $$shash{$chash{$oldval}};
123: delete $hash{'storectr_'.$chash{$oldval}};
124: delete $hash{'store_'.$chash{$oldval}};
125: } elsif ($oldval < $newval) { # push down
126: for my $idx ($oldval..($newval-1)) {
127: $$shash{$chash{$idx+1}} = $idx;
128: $hash{'storectr_'.$chash{$idx+1}} = $idx;
129: }
130: } elsif ($oldval > $newval) { # push up
131: for my $idx (reverse($newval..($oldval-1))) {
132: $$shash{$chash{$idx}} = $idx+1;
133: $hash{'storectr_'.$chash{$idx}} = $idx+1;
134: }
135: }
136: }
137: }
138: } else {
139: $r->print('Unable to tie hash to db file');
140: }
141: untie %hash;
142: return ($shash,$thash);
143: }
144:
145:
146:
147: sub cleanup {
148: if (tied(%hash)){
149: &Apache::lonnet::logthis('Cleanup groupsort: hash');
150: unless (untie(%hash)) {
151: &Apache::lonnet::logthis('Failed cleanup groupsort: hash');
152: }
153: }
154: return OK;
155: }
156:
157: # -------------------------------------------------------------- Read from file
158:
159: sub readfromfile {
160: my ($r,$shash,$thash,$nhash)=@_;
161: my $cont=&Apache::lonnet::getfile
162: (&Apache::lonnet::filelocation('',$env{'form.readfile'}));
163: if ($cont==-1) {
164: $r->print('Unable to read file: '.
165: &Apache::lonnet::filelocation('',$env{'form.readfile'}));
166: } else {
167: my $parser = HTML::TokeParser->new(\$cont);
168: my $token;
169: my $n=1;
170: while ($token = $parser->get_token) {
171: if ($token->[0] eq 'S') {
172: if ($token->[1] eq 'resource') {
173: if ($env{'form.recover'}) {
174: if ($token->[2]->{'type'} ne 'zombie') { next; }
175: } else {
176: if ($token->[2]->{'type'} eq 'zombie') { next; }
177: }
178:
179: my $url=$token->[2]->{'src'};
180: my $name=$token->[2]->{'title'};
181: $name=~s/ \[\((\d+)\,($LONCAPA::username_re)\,($LONCAPA::domain_re)\)\]$//;
182: if ($1) {
183: $$nhash{$url}='<br />'.&mt('Removed by ').
184: &Apache::loncommon::plainname($2,$3).', '.
185: &Apache::lonlocal::locallocaltime($1);
186: }
187: $name=~s/\&colon\;/\:/g;
188: $$thash{$url}=$name;
189: $$shash{$url}=$n;
190: $n++;
191: }
192: }
193: }
194: }
195: return ($shash,$thash);
196: }
197:
198: # --------------------------------------------------------- Read from bookmarks
199:
200: sub readfrombookmarks {
201: my ($r,$shash,$thash)=@_;
202: my %bookmarks=&Apache::lonnet::dump('bookmarks');
203: # the bookmark "hash" is just one entry
204: # it's a javascript program code with arguments like ('title','url');
205: my @bookmarks=($bookmarks{'bookmarks'}=~/\((?:\'([^\']+)\'\,\'([^\']+)\'|\"([^\"]+)\"\,\"([^\"]+)\")\)\;/g);
206: my $order=1;
207: for (my $index=0;$index<($#bookmarks+1)/2;$index++) {
208: if ($bookmarks[$index*2+1]) {
209: $$thash{$bookmarks[$index*2+1]}=$bookmarks[$index*2];
210: $$thash{$bookmarks[$index*2+1]}=~s/^LON\-CAPA\s+//;
211: $$shash{$bookmarks[$index*2+1]}=$order;
212: $order++;
213: }
214: }
215: return ($shash,$thash);
216: }
217:
218: # ---------------------------------------------------------------- Main Handler
219: sub handler {
220: my $r = shift;
221:
222: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
223: ['acts','mode','readfile','recover','bookmarks']);
224: # color scheme
225: my $fileclr = '#ffffe6';
226: my $titleclr = '#ddffff';
227:
228: &Apache::loncommon::content_type($r,'text/html');
229: $r->send_http_header;
230: return OK if $r->header_only;
231:
232: # finish_import looks different for graphical or "simple" RAT
233: my $finishimport='';
234: my $begincondition='';
235: my $endcondition='';
236: if (($env{'form.readfile'}) || ($env{'form.bookmarks'})) {
237: $begincondition='if (eval("document.forms.groupsort.include"+num+".checked")) {';
238: $endcondition='}';
239: }
240: if ($env{'form.mode'} eq 'simple' || $env{'form.mode'} eq '') {
241: $finishimport=(<<ENDSMP);
242: function finish_import() {
243: opener.document.forms.simpleedit.importdetail.value='';
244: for (var num=0; num<document.forms.groupsort.fnum.value; num++) {
245: $begincondition
246: opener.document.forms.simpleedit.importdetail.value+='&'+
247: escape(eval("document.forms.groupsort.title"+num+".value"))+'='+
248: escape(eval("document.forms.groupsort.filelink"+num+".value"));
249: $endcondition
250: }
251: opener.document.forms.simpleedit.submit();
252: self.close();
253: }
254: ENDSMP
255: } else {
256: $finishimport=(<<ENDADV);
257: function finish_import() {
258: var linkflag=false;
259: for (var num=0; num<document.forms.groupsort.fnum.value; num++) {
260: $begincondition
261: insertRowInLastRow();
262: placeResourceInLastRow(
263: eval("document.forms.groupsort.title"+num+".value"),
264: eval("document.forms.groupsort.filelink"+num+".value"),
265: linkflag
266: );
267: linkflag=true;
268: $endcondition
269: }
270: opener.editmode=0;
271: opener.notclear=0;
272: opener.linkmode=0;
273: opener.draw();
274: self.close();
275: }
276: ENDADV
277: }
278:
279: # output start of web page
280: my $js = <<END;
281: <script type="text/javascript">
282: function insertRowInLastRow() {
283: opener.insertrow(opener.maxrow);
284: opener.addobj(opener.maxrow,'e&2');
285: }
286: function placeResourceInLastRow (title,url,linkflag) {
287: opener.mostrecent=opener.newresource(opener.maxrow,2,opener.escape(title),
288: opener.escape(url),'false','normal');
289: opener.save();
290: if (linkflag) {
291: opener.joinres(opener.linkmode,opener.mostrecent,0);
292: }
293: opener.linkmode=opener.mostrecent;
294: }
295: $finishimport
296: function selectchange(val) {
297: var newval=0+eval("document.forms.groupsort.alt"+val+".selectedIndex");
298: orderchange(val,newval);
299: }
300: function move(val,newval) {
301: orderchange(val,newval);
302: }
303: function orderchange(val,newval) {
304: document.forms.groupsort.oldval.value=val;
305: document.forms.groupsort.newval.value=newval;
306: document.forms.groupsort.submit();
307: }
308: </script>
309: END
310: # read pertinent machine configuration
311: my $domain = $r->dir_config('lonDefDomain');
312: $iconpath = $r->dir_config('lonIconsURL') . "/";
313:
314: my %shash; # sort order (key is resource location, value is sort order)
315: my %thash; # title (key is resource location, value is title)
316: my %nhash; # notes (key is resource location);
317:
318: if ($env{'form.readfile'}) {
319: &readfromfile($r,\%shash,\%thash,\%nhash);
320: } elsif ($env{'form.bookmarks'}) {
321: &readfrombookmarks($r,\%shash,\%thash);
322: } else {
323: &readfromdb($r,\%shash,\%thash);
324: }
325:
326: my $ctr = 0;
327: my $clen = scalar(keys %shash);
328: if (($clen > 1) || ($env{'form.readfile'}) || ($env{'form.bookmarks'})) {
329: my %lt=&Apache::lonlocal::texthash(
330: 'fin'=> 'Finalize order of resources',
331: 'ci' => 'Continue Import',
332: 'cs' => 'Continue Search',
333: 'fi' => 'Finish Import',
334: 're' => 'Recover Checked',
335: 'ca' => 'Cancel',
336: 'co' => 'Change Order',
337: 'ti' => 'Title',
338: 'pa' => 'Path',
339: 'in' => 'Include'
340: );
341: $r->print(&Apache::loncommon::start_page('Sort Imported Resources',
342: $js));
343: $r->print(<<END);
344: <b><font color="#888888">$lt{'fin'}</font></b>
345: <form method='post' action='/adm/groupsort' name='groupsort'
346: enctype='application/x-www-form-urlencoded'>
347: <input type="hidden" name="fnum" value="$clen" />
348: <input type="hidden" name="oldval" value="" />
349: <input type="hidden" name="newval" value="" />
350: <input type="hidden" name="mode" value="$env{'form.mode'}" />
351: <input type="hidden" name="readfile" value="$env{'form.readfile'}" />
352: <input type="hidden" name="bookmarks" value="$env{'form.bookmarks'}" />
353: <input type="hidden" name="recover" value="$env{'form.recover'}" />
354: END
355:
356:
357: # ---
358:
359: if ($env{'form.recover'}) {
360: $r->print(<<END);
361: <input type="button" name="alter" value="$lt{'re'}"
362: onClick="finish_import()" />
363: <input type="button" name="alter" value="$lt{'ca'}" onClick="self.close()" />
364: END
365: } else {
366: # --- Continue Buttons
367: my $resurl =
368: &Apache::loncommon::escape_single(&Apache::loncommon::lastresurl());
369: $r->print(<<END);
370: <input type="button" name="alter" value="$lt{'ci'}"
371: onClick="window.location='$resurl?catalogmode=import'" />
372: <input type="button" name="altersearch" value="$lt{'cs'}"
373: onClick="window.location='/adm/searchcat?catalogmode=import'" />
374: <input type="button" name="alter" value="$lt{'fi'}"
375: onClick="finish_import()" />
376: <input type="button" name="alter" value="$lt{'ca'}" onClick="self.close()" />
377: END
378: }
379: $r->print("<table border='0'><tr><td bgcolor='#eeeeee'>");
380: $r->print("<table border=0><tr>\n");
381: if (($env{'form.readfile'}) || ($env{'form.bookmarks'})) {
382: $r->print("<td bgcolor='$titleclr'><b>$lt{'in'}</b></td>\n");
383: } else {
384: $r->print("<td colspan='2' bgcolor='$titleclr'><b>$lt{'co'}</b></td>\n");
385: }
386: $r->print("<td colspan='2' bgcolor='$titleclr'><b>$lt{'ti'}</b></td>\n");
387: $r->print("<td bgcolor='$titleclr'><b>$lt{'pa'}</b></td></tr>\n");
388: } else {
389: $r->print(&Apache::loncommon::start_page(undef,$js,
390: {'only_body' => 1}));
391: $r->print(<<END);
392: <form method='post' action='/adm/groupsort' name='groupsort'
393: enctype='application/x-www-form-urlencoded'>
394: <input type="hidden" name="fnum" value="$clen" />
395: <input type="hidden" name="oldval" value="" />
396: <input type="hidden" name="newval" value="" />
397: <input type="hidden" name="mode" value="$env{'form.mode'}" />
398: END
399: }
400: foreach (sort {$shash{$a}<=>$shash{$b}} (keys %shash)) {
401: my $key=$_;
402: $ctr++;
403: my $iconname=&Apache::loncommon::icon($key);
404: if (($clen > 1) || ($env{'form.readfile'}) || ($env{'form.bookmarks'})) {
405: $r->print("<tr><td bgcolor='$fileclr'>");
406: if (($env{'form.readfile'}) || ($env{'form.bookmarks'})) {
407: $r->print(&checkbox($ctr-1));
408: } else {
409: $r->print(&movers($clen,$ctr));
410: }
411: }
412: $r->print(&hidden($ctr-1,$thash{$key},$key));
413: if (($clen > 1) || ($env{'form.readfile'}) || ($env{'form.bookmarks'})) {
414: $r->print("</td>");
415: unless (($env{'form.readfile'}) || ($env{'form.bookmarks'})) {
416: $r->print("<td bgcolor='$fileclr'>".
417: &select_box($clen,$ctr).
418: "</td>");
419: }
420: $r->print("<td bgcolor='$fileclr'>");
421: $r->print("<img src='$iconname' />");
422: $r->print("</td><td bgcolor='$fileclr'>");
423: $r->print("$thash{$key}$nhash{$key}</td><td bgcolor='$fileclr'>\n");
424: $r->print("$key</td></tr>\n");
425: }
426: }
427: if (($clen > 1) || ($env{'form.readfile'}) || ($env{'form.bookmarks'})) {
428: $r->print("</table></td></tr></table></form>");
429: } else {
430: $r->print(<<END);
431: <script type="text/javascript">
432: finish_import();
433: </script>
434: END
435: }
436:
437: $r->print(&Apache::loncommon::end_page());
438:
439: return OK;
440: }
441:
442: # --------------------------------------- Hidden values (returns scalar string)
443: sub hidden {
444: my ($sel,$title,$filelink) = @_;
445: my $string = '<input type="hidden" name="title'.$sel.'" value="'.$title.
446: '" />';
447: $filelink=~s|^/ext/|http://|;
448: $string .= '<input type="hidden" name="filelink'.$sel.'" value="'.
449: $filelink.'" />';
450: return $string;
451: }
452:
453: # --------------------------------------- Moving arrows (returns scalar string)
454: sub movers {
455: my ($total,$sel) = @_;
456: my $dsel = $sel-1;
457: my $usel = $sel+1;
458: $usel = 1 if $usel > $total;
459: $dsel = $total if $dsel < 1;
460: my $string;
461: $string = (<<END);
462: <table border='0' cellspacing='0' cellpadding='0'>
463: <tr><td><a href='javascript:move($sel,$dsel)'>
464: <img src="${iconpath}move_up.gif" alt='UP' border='0' /></a></td></tr>
465: <tr><td><a href='javascript:move($sel,$usel)'>
466: <img src="${iconpath}move_down.gif" alt='DOWN' border='0' /></a></td></tr>
467: </table>
468: END
469: return $string;
470: }
471:
472: # ------------------------------------------ Select box (returns scalar string)
473: sub select_box {
474: my ($total,$sel) = @_;
475: my $string;
476: $string = '<select name="alt'.$sel.'"';
477: $string .= " onChange='selectchange($sel)'>";
478: $string .= "<option name='o0' value='0'>".&mt('discard')."</option>";
479: for my $cur (1..$total) {
480: $string .= "<option name='o$cur' value='$cur'";
481: if ($cur == $sel) {
482: $string .= "selected";
483: }
484: $string .= ">$cur</option>";
485: }
486: $string .= "</select>\n";
487: return $string;
488: }
489:
490: # ------------------------------------------------------------------- Checkbox
491:
492: sub checkbox {
493: my $sel=shift;
494: return "<label><input type='checkbox' name='include$sel'".
495: ($env{"form.include$sel"}?' checked="checked"':'').
496: ' />'.&mt('Include').'</label>';
497: }
498:
499: 1;
500:
501: __END__
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