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 1.56 2007/07/11 23:53:59 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 $iconpath; # variable to be accessible to multiple subroutines
43: my %hash; # variable to tie to user specific database
44:
45:
46: sub update_actions_hash {
47: my ($hash) = @_;
48: my $acts=$env{'form.acts'};
49: my @Acts=split(/b/,$acts);
50: my %ahash;
51: my %achash;
52: my $ac=0;
53: # some initial hashes for working with data
54: foreach (@Acts) {
55: my ($state,$ref)=split(/a/);
56: $ahash{$ref}=$state;
57: $achash{$ref}=$ac;
58: $ac++;
59: }
60: # sorting through the actions and changing the global database hash
61: foreach my $key (sort {$achash{$a}<=>$achash{$b}} (keys %ahash)) {
62: if ($ahash{$key} eq '1') {
63: $hash->{'store_'.$hash{'pre_'.$key.'_link'}}=
64: $hash->{'pre_'.$key.'_title'};
65: $hash->{'storectr_'.$hash{'pre_'.$key.'_link'}}=
66: $hash->{'storectr'}+0;
67: $hash->{'storectr'}++;
68: }
69: if ($ahash{$key} eq '0') {
70: if ($hash->{'store_'.$hash{'pre_'.$key.'_link'}}) {
71: delete($hash->{'store_'.$hash{'pre_'.$key.'_link'}});
72: }
73: }
74: }
75: # deleting the previously cached listing
76: foreach my $key (keys(%{ $hash })) {
77: next if ($key !~ /^pre_(\d+)_link/);
78: my $which = $1;
79: delete($hash->{'pre_'.$which.'_title'});
80: delete($hash->{'pre_'.$which.'_link'});
81: }
82: }
83:
84: sub readfromdb {
85: my ($r,$shash,$thash)=@_;
86:
87: my $diropendb =
88: "/home/httpd/perl/tmp/$env{'user.domain'}_$env{'user.name'}_sel_res.db";
89:
90: # ----------------------------- diropendb is now the filename of the db to open
91: if (tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) {
92: &update_actions_hash(\%hash);
93:
94: foreach (keys %hash) {
95: if ($_ =~ /^store_/) {
96: my $key = $_;
97: $key =~ s/^store_//;
98: $$shash{$key} = $hash{'storectr_'.$key};
99: if (&Apache::lonnet::gettitle($key) eq '') {
100: $$thash{$key} = $hash{'store_'.$key};
101: } else {
102: $$thash{$key} = &Apache::lonnet::gettitle($key);
103: }
104: }
105: }
106: if ($env{'form.oldval'}) {
107: my $newctr = 0;
108: my %chash;
109: foreach (sort {$$shash{$a} <=> $$shash{$b}} (keys %{$shash})) {
110: my $key = $_;
111: $newctr++;
112: $$shash{$key} = $newctr;
113: $hash{'storectr_'.$key} = $newctr;
114: $chash{$newctr} = $key;
115: }
116: my $oldval = $env{'form.oldval'};
117: my $newval = $env{'form.newval'};
118: if ($oldval != $newval) {
119: # when newval==0, then push down and delete
120: if ($newval!=0) {
121: $$shash{$chash{$oldval}} = $newval;
122: $hash{'storectr_'.$chash{$oldval}} = $newval;
123: } else {
124: $$shash{$chash{$oldval}} = $newctr;
125: $hash{'storectr_'.$chash{$oldval}} = $newctr;
126: }
127: if ($newval==0) { # push down
128: my $newval2=$newctr;
129: for my $idx ($oldval..($newval2-1)) {
130: $$shash{$chash{$idx+1}} = $idx;
131: $hash{'storectr_'.$chash{$idx+1}} = $idx;
132: }
133: delete $$shash{$chash{$oldval}};
134: delete $hash{'storectr_'.$chash{$oldval}};
135: delete $hash{'store_'.$chash{$oldval}};
136: } elsif ($oldval < $newval) { # push down
137: for my $idx ($oldval..($newval-1)) {
138: $$shash{$chash{$idx+1}} = $idx;
139: $hash{'storectr_'.$chash{$idx+1}} = $idx;
140: }
141: } elsif ($oldval > $newval) { # push up
142: for my $idx (reverse($newval..($oldval-1))) {
143: $$shash{$chash{$idx}} = $idx+1;
144: $hash{'storectr_'.$chash{$idx}} = $idx+1;
145: }
146: }
147: }
148: }
149: } else {
150: $r->print('Unable to tie hash to db file');
151: }
152: untie %hash;
153: return ($shash,$thash);
154: }
155:
156:
157:
158: sub cleanup {
159: if (tied(%hash)){
160: &Apache::lonnet::logthis('Cleanup groupsort: hash');
161: unless (untie(%hash)) {
162: &Apache::lonnet::logthis('Failed cleanup groupsort: hash');
163: }
164: }
165: return OK;
166: }
167:
168: # -------------------------------------------------------------- Read from file
169:
170: sub readfromfile {
171: my ($r,$shash,$thash,$nhash)=@_;
172: my $cont=&Apache::lonnet::getfile
173: (&Apache::lonnet::filelocation('',$env{'form.readfile'}));
174: if ($cont==-1) {
175: $r->print('Unable to read file: '.
176: &Apache::lonnet::filelocation('',$env{'form.readfile'}));
177: } else {
178: my $parser = HTML::TokeParser->new(\$cont);
179: my $token;
180: my $n=1;
181: while ($token = $parser->get_token) {
182: if ($token->[0] eq 'S') {
183: if ($token->[1] eq 'resource') {
184: if ($env{'form.recover'}) {
185: if ($token->[2]->{'type'} ne 'zombie') { next; }
186: } else {
187: if ($token->[2]->{'type'} eq 'zombie') { next; }
188: }
189:
190: my $url=$token->[2]->{'src'};
191: my $name=$token->[2]->{'title'};
192: $name=~s/ \[\((\d+)\,($LONCAPA::username_re)\,($LONCAPA::domain_re)\)\]$//;
193: if ($1) {
194: $$nhash{$url}='<br />'.&mt('Removed by ').
195: &Apache::loncommon::plainname($2,$3).', '.
196: &Apache::lonlocal::locallocaltime($1);
197: }
198: $name=~s/\&colon\;/\:/g;
199: $$thash{$url}=$name;
200: $$shash{$url}=$n;
201: $n++;
202: }
203: }
204: }
205: }
206: return ($shash,$thash);
207: }
208:
209: # --------------------------------------------------------- Read from bookmarks
210:
211: sub readfrombookmarks {
212: my ($r,$shash,$thash)=@_;
213: my %bookmarks=&Apache::lonnet::dump('bookmarks');
214: # the bookmark "hash" is just one entry
215: # it's a javascript program code with arguments like ('title','url');
216: my @bookmarks=($bookmarks{'bookmarks'}=~/\((?:\'([^\']+)\'\,\'([^\']+)\'|\"([^\"]+)\"\,\"([^\"]+)\")\)\;/g);
217: my $order=1;
218: for (my $index=0;$index<($#bookmarks+1)/2;$index++) {
219: if ($bookmarks[$index*2+1]) {
220: $$thash{$bookmarks[$index*2+1]}=$bookmarks[$index*2];
221: $$thash{$bookmarks[$index*2+1]}=~s/^LON\-CAPA\s+//;
222: $$shash{$bookmarks[$index*2+1]}=$order;
223: $order++;
224: }
225: }
226: return ($shash,$thash);
227: }
228:
229: # ---------------------------------------------------------------- Main Handler
230: sub handler {
231: my $r = shift;
232:
233: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
234: ['acts','mode','readfile','recover','bookmarks']);
235: # color scheme
236: my $fileclr = '#ffffe6';
237: my $titleclr = '#ddffff';
238:
239: &Apache::loncommon::content_type($r,'text/html');
240: $r->send_http_header;
241: return OK if $r->header_only;
242:
243: # finish_import looks different for graphical or "simple" RAT
244: my $finishimport='';
245: my $begincondition='';
246: my $endcondition='';
247: if (($env{'form.readfile'}) || ($env{'form.bookmarks'})) {
248: $begincondition='if (eval("document.forms.groupsort.include"+num+".checked")) {';
249: $endcondition='}';
250: }
251: if ($env{'form.mode'} eq 'simple' || $env{'form.mode'} eq '') {
252: $finishimport=(<<ENDSMP);
253: function finish_import() {
254: opener.document.forms.simpleedit.importdetail.value='';
255: for (var num=0; num<document.forms.groupsort.fnum.value; num++) {
256: $begincondition
257: opener.document.forms.simpleedit.importdetail.value+='&'+
258: escape(eval("document.forms.groupsort.title"+num+".value"))+'='+
259: escape(eval("document.forms.groupsort.filelink"+num+".value"));
260: $endcondition
261: }
262: opener.document.forms.simpleedit.submit();
263: self.close();
264: }
265: ENDSMP
266: } else {
267: $finishimport=(<<ENDADV);
268: function finish_import() {
269: var linkflag=false;
270: for (var num=0; num<document.forms.groupsort.fnum.value; num++) {
271: $begincondition
272: insertRowInLastRow();
273: placeResourceInLastRow(
274: eval("document.forms.groupsort.title"+num+".value"),
275: eval("document.forms.groupsort.filelink"+num+".value"),
276: linkflag
277: );
278: linkflag=true;
279: $endcondition
280: }
281: opener.editmode=0;
282: opener.notclear=0;
283: opener.linkmode=0;
284: opener.draw();
285: self.close();
286: }
287: ENDADV
288: }
289:
290: # output start of web page
291: my $js = <<END;
292: <script type="text/javascript">
293: function insertRowInLastRow() {
294: opener.insertrow(opener.maxrow);
295: opener.addobj(opener.maxrow,'e&2');
296: }
297: function placeResourceInLastRow (title,url,linkflag) {
298: opener.mostrecent=opener.newresource(opener.maxrow,2,opener.escape(title),
299: opener.escape(url),'false','normal');
300: opener.save();
301: if (linkflag) {
302: opener.joinres(opener.linkmode,opener.mostrecent,0);
303: }
304: opener.linkmode=opener.mostrecent;
305: }
306: $finishimport
307: function selectchange(val) {
308: var newval=0+eval("document.forms.groupsort.alt"+val+".selectedIndex");
309: orderchange(val,newval);
310: }
311: function move(val,newval) {
312: orderchange(val,newval);
313: }
314: function orderchange(val,newval) {
315: document.forms.groupsort.oldval.value=val;
316: document.forms.groupsort.newval.value=newval;
317: document.forms.groupsort.submit();
318: }
319: </script>
320: END
321: # read pertinent machine configuration
322: my $domain = $r->dir_config('lonDefDomain');
323: $iconpath = $r->dir_config('lonIconsURL') . "/";
324:
325: my %shash; # sort order (key is resource location, value is sort order)
326: my %thash; # title (key is resource location, value is title)
327: my %nhash; # notes (key is resource location);
328:
329: if ($env{'form.readfile'}) {
330: &readfromfile($r,\%shash,\%thash,\%nhash);
331: } elsif ($env{'form.bookmarks'}) {
332: &readfrombookmarks($r,\%shash,\%thash);
333: } else {
334: &readfromdb($r,\%shash,\%thash);
335: }
336:
337: my $ctr = 0;
338: my $clen = scalar(keys %shash);
339: if (($clen > 1) || ($env{'form.readfile'}) || ($env{'form.bookmarks'})) {
340: my %lt=&Apache::lonlocal::texthash(
341: 'fin'=> 'Finalize order of resources',
342: 'ci' => 'Continue Import',
343: 'cs' => 'Continue Search',
344: 'fi' => 'Finish Import',
345: 're' => 'Recover Checked',
346: 'ca' => 'Cancel',
347: 'co' => 'Change Order',
348: 'ti' => 'Title',
349: 'pa' => 'Path',
350: 'in' => 'Include'
351: );
352: my $title = ($env{'form.recover'}) ? 'Recover Removed Resources'
353: : 'Sort Imported Resources';
354: $r->print(&Apache::loncommon::start_page($title, $js));
355:
356: $r->print(<<END);
357: <form method='post' action='/adm/groupsort' name='groupsort'
358: enctype='application/x-www-form-urlencoded'>
359: <input type="hidden" name="fnum" value="$clen" />
360: <input type="hidden" name="oldval" value="" />
361: <input type="hidden" name="newval" value="" />
362: <input type="hidden" name="mode" value="$env{'form.mode'}" />
363: <input type="hidden" name="readfile" value="$env{'form.readfile'}" />
364: <input type="hidden" name="bookmarks" value="$env{'form.bookmarks'}" />
365: <input type="hidden" name="recover" value="$env{'form.recover'}" />
366: END
367:
368: $r->print(&Apache::loncommon::inhibit_menu_check('input'));
369: # ---
370:
371: if ($env{'form.recover'}) {
372: $r->print(<<END);
373: <input type="button" name="alter" value="$lt{'re'}"
374: onClick="finish_import()" />
375: <input type="button" name="alter" value="$lt{'ca'}" onClick="self.close()" />
376: END
377: } else {
378: # --- Continue Buttons
379: my $resurl =
380: &Apache::loncommon::escape_single(&Apache::loncommon::lastresurl());
381: $r->print(<<END);
382: <b><font color="#888888">$lt{'fin'}</font></b>
383: <input type="button" name="alter" value="$lt{'ci'}"
384: onClick="window.location='$resurl?inhibitmenu=yes&catalogmode=import'" />
385: <input type="button" name="altersearch" value="$lt{'cs'}"
386: onClick="window.location='/adm/searchcat?inhibitmenu=yes&catalogmode=import'" />
387: <input type="button" name="alter" value="$lt{'fi'}"
388: onClick="finish_import()" />
389: <input type="button" name="alter" value="$lt{'ca'}" onClick="self.close()" />
390: END
391: }
392: $r->print("<table border='0'><tr><td bgcolor='#eeeeee'>");
393: $r->print("<table border=0><tr>\n");
394: if (($env{'form.readfile'}) || ($env{'form.bookmarks'})) {
395: $r->print("<td bgcolor='$titleclr'><b>$lt{'in'}</b></td>\n");
396: } else {
397: $r->print("<td colspan='2' bgcolor='$titleclr'><b>$lt{'co'}</b></td>\n");
398: }
399: $r->print("<td colspan='2' bgcolor='$titleclr'><b>$lt{'ti'}</b></td>\n");
400: $r->print("<td bgcolor='$titleclr'><b>$lt{'pa'}</b></td></tr>\n");
401: } else {
402: $r->print(&Apache::loncommon::start_page(undef,$js,
403: {'only_body' => 1}));
404: $r->print(<<END);
405: <form method='post' action='/adm/groupsort' name='groupsort'
406: enctype='application/x-www-form-urlencoded'>
407: <input type="hidden" name="fnum" value="$clen" />
408: <input type="hidden" name="oldval" value="" />
409: <input type="hidden" name="newval" value="" />
410: <input type="hidden" name="mode" value="$env{'form.mode'}" />
411: END
412: $r->print(&Apache::loncommon::inhibit_menu_check('input'));
413:
414: }
415: foreach (sort {$shash{$a}<=>$shash{$b}} (keys %shash)) {
416: my $key=$_;
417: $ctr++;
418: my $iconname=&Apache::loncommon::icon($key);
419: if (($clen > 1) || ($env{'form.readfile'}) || ($env{'form.bookmarks'})) {
420: $r->print("<tr><td bgcolor='$fileclr'>");
421: if (($env{'form.readfile'}) || ($env{'form.bookmarks'})) {
422: $r->print(&checkbox($ctr-1));
423: } else {
424: $r->print(&movers($clen,$ctr));
425: }
426: }
427: $r->print(&hidden($ctr-1,$thash{$key},$key));
428: if (($clen > 1) || ($env{'form.readfile'}) || ($env{'form.bookmarks'})) {
429: $r->print("</td>");
430: unless (($env{'form.readfile'}) || ($env{'form.bookmarks'})) {
431: $r->print("<td bgcolor='$fileclr'>".
432: &select_box($clen,$ctr).
433: "</td>");
434: }
435: $r->print("<td bgcolor='$fileclr'>");
436: $r->print("<img src='$iconname' />");
437: $r->print("</td><td bgcolor='$fileclr'>");
438: $r->print("$thash{$key}$nhash{$key}</td><td bgcolor='$fileclr'>\n");
439: $r->print("$key</td></tr>\n");
440: }
441: }
442: if (($clen > 1) || ($env{'form.readfile'}) || ($env{'form.bookmarks'})) {
443: $r->print("</table></td></tr></table></form>");
444: } else {
445: $r->print(<<END);
446: <script type="text/javascript">
447: finish_import();
448: </script>
449: END
450: }
451:
452: $r->print(&Apache::loncommon::end_page());
453:
454: return OK;
455: }
456:
457: # --------------------------------------- Hidden values (returns scalar string)
458: sub hidden {
459: my ($sel,$title,$filelink) = @_;
460: my $string = '<input type="hidden" name="title'.$sel.'" value="'.$title.
461: '" />';
462: $filelink=~s|^/ext/|http://|;
463: $string .= '<input type="hidden" name="filelink'.$sel.'" value="'.
464: $filelink.'" />';
465: return $string;
466: }
467:
468: # --------------------------------------- Moving arrows (returns scalar string)
469: sub movers {
470: my ($total,$sel) = @_;
471: my $dsel = $sel-1;
472: my $usel = $sel+1;
473: $usel = 1 if $usel > $total;
474: $dsel = $total if $dsel < 1;
475: my $string;
476: $string = (<<END);
477: <table border='0' cellspacing='0' cellpadding='0'>
478: <tr><td><a href='javascript:move($sel,$dsel)'>
479: <img src="${iconpath}move_up.gif" alt='UP' border='0' /></a></td></tr>
480: <tr><td><a href='javascript:move($sel,$usel)'>
481: <img src="${iconpath}move_down.gif" alt='DOWN' border='0' /></a></td></tr>
482: </table>
483: END
484: return $string;
485: }
486:
487: # ------------------------------------------ Select box (returns scalar string)
488: sub select_box {
489: my ($total,$sel) = @_;
490: my $string;
491: $string = '<select name="alt'.$sel.'"';
492: $string .= " onChange='selectchange($sel)'>";
493: $string .= "<option name='o0' value='0'>".&mt('discard')."</option>";
494: for my $cur (1..$total) {
495: $string .= "<option name='o$cur' value='$cur'";
496: if ($cur == $sel) {
497: $string .= "selected";
498: }
499: $string .= ">$cur</option>";
500: }
501: $string .= "</select>\n";
502: return $string;
503: }
504:
505: # ------------------------------------------------------------------- Checkbox
506:
507: sub checkbox {
508: my $sel=shift;
509: return "<label><input type='checkbox' name='include$sel'".
510: ($env{"form.include$sel"}?' checked="checked"':'').
511: ' />'.&mt('Include').'</label>';
512: }
513:
514: 1;
515:
516: __END__
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