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 1.33 2005/06/09 22:06:09 www 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:
41: my $iconpath; # variable to be accessible to multiple subroutines
42: my %hash; # variable to tie to user specific database
43:
44:
45: sub readfromdb {
46: my ($r,$shash,$thash)=@_;
47:
48: my $diropendb;
49: # ------------------------------ which file do we open? Easy if explictly given
50: if ($env{'form.catalogmode'} eq 'groupsearch') {
51: $diropendb =
52: "/home/httpd/perl/tmp/$env{'user.domain'}_$env{'user.name'}_searchcat.db";
53: } elsif ($env{'form.catalogmode'} eq 'groupimport') {
54: $diropendb =
55: "/home/httpd/perl/tmp/$env{'user.domain'}_$env{'user.name'}_indexer.db";
56: } elsif ($env{'form.catalogmode'} eq 'groupsec') {
57: $diropendb =
58: "/home/httpd/perl/tmp/$env{'user.domain'}_$env{'user.name'}_groupsec.db";
59: } else {
60: # --------------------- not explicitly given, choose the one most recently used
61: my @dbfn;
62: my @dbst;
63:
64: $dbfn[0] =
65: "/home/httpd/perl/tmp/$env{'user.domain'}_$env{'user.name'}_searchcat.db";
66: $dbst[0]=-1;
67: if (-e $dbfn[0]) {
68: $dbst[0]=(stat($dbfn[0]))[9];
69: }
70: $dbfn[1] =
71: "/home/httpd/perl/tmp/$env{'user.domain'}_$env{'user.name'}_indexer.db";
72: $dbst[1]=-1;
73: if (-e $dbfn[1]) {
74: $dbst[1]=(stat($dbfn[1]))[9];
75: }
76: $dbfn[2] =
77: "/home/httpd/perl/tmp/$env{'user.domain'}_$env{'user.name'}_groupsec.db";
78: $dbst[2]=-1;
79: if (-e $dbfn[2]) {
80: $dbst[2]=(stat($dbfn[2]))[9];
81: }
82: # Expand here for more modes
83: # ....
84:
85: # Okay, find most recent existing
86:
87: my $newest=0;
88: $diropendb='';
89: for (my $i=0; $i<=$#dbfn; $i++) {
90: if ($dbst[$i]>$newest) {
91: $newest=$dbst[$i];
92: $diropendb=$dbfn[$i];
93: }
94: }
95:
96: }
97: # ----------------------------- diropendb is now the filename of the db to open
98: if (tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) {
99: my $acts = $env{'form.acts'};
100: my @Acts = split(/b/,$acts);
101: my %ahash;
102: my %achash;
103: my $ac = 0;
104: foreach (@Acts) {
105: my ($state,$ref) = split(/a/);
106: $ahash{$ref} = $state;
107: $achash{$ref} = $ac;
108: $ac++;
109: }
110: foreach (sort {$achash{$a} <=> $achash{$b}} (keys %ahash)) {
111: my $key = $_;
112: if ($ahash{$key} eq '1') {
113: # my $keyz=join("<br />",keys %hash);
114: # print "<br />$key<br />$keyz".$hash{'pre_'.$key.'_link'}."<br />\n";
115: $hash{'store_'.$hash{'pre_'.$key.'_link'}} =
116: $hash{'pre_'.$key.'_title'};
117: $hash{'storectr_'.$hash{'pre_'.$key.'_link'}} =
118: $hash{'storectr'}+0;
119: $hash{'storectr'}++;
120: }
121: if ($ahash{$key} eq '0') {
122: if ($hash{'store_'.$hash{'pre_'.$key.'_link'}}) {
123: delete $hash{'store_'.$hash{'pre_'.$key.'_link'}};
124: }
125: }
126: }
127: foreach (keys %hash) {
128: if ($_ =~ /^store_/) {
129: my $key = $_;
130: $key =~ s/^store_//;
131: $$shash{$key} = $hash{'storectr_'.$key};
132: if (&Apache::lonnet::gettitle($key) eq '') {
133: $$thash{$key} = $hash{'store_'.$key};
134: } else {
135: $$thash{$key} = &Apache::lonnet::gettitle($key);
136: }
137: }
138: }
139: if ($env{'form.oldval'}) {
140: my $newctr = 0;
141: my %chash;
142: foreach (sort {$$shash{$a} <=> $$shash{$b}} (keys %{$shash})) {
143: my $key = $_;
144: $newctr++;
145: $$shash{$key} = $newctr;
146: $hash{'storectr_'.$key} = $newctr;
147: $chash{$newctr} = $key;
148: }
149: my $oldval = $env{'form.oldval'};
150: my $newval = $env{'form.newval'};
151: if ($oldval != $newval) {
152: # when newval==0, then push down and delete
153: if ($newval!=0) {
154: $$shash{$chash{$oldval}} = $newval;
155: $hash{'storectr_'.$chash{$oldval}} = $newval;
156: } else {
157: $$shash{$chash{$oldval}} = $newctr;
158: $hash{'storectr_'.$chash{$oldval}} = $newctr;
159: }
160: if ($newval==0) { # push down
161: my $newval2=$newctr;
162: for my $idx ($oldval..($newval2-1)) {
163: $$shash{$chash{$idx+1}} = $idx;
164: $hash{'storectr_'.$chash{$idx+1}} = $idx;
165: }
166: delete $$shash{$chash{$oldval}};
167: delete $hash{'storectr_'.$chash{$oldval}};
168: delete $hash{'store_'.$chash{$oldval}};
169: } elsif ($oldval < $newval) { # push down
170: for my $idx ($oldval..($newval-1)) {
171: $$shash{$chash{$idx+1}} = $idx;
172: $hash{'storectr_'.$chash{$idx+1}} = $idx;
173: }
174: } elsif ($oldval > $newval) { # push up
175: for my $idx (reverse($newval..($oldval-1))) {
176: $$shash{$chash{$idx}} = $idx+1;
177: $hash{'storectr_'.$chash{$idx}} = $idx+1;
178: }
179: }
180: }
181: }
182: } else {
183: $r->print('Unable to tie hash to db file</body></html>');
184: return OK;
185: }
186: untie %hash;
187: return ($shash,$thash);
188: }
189:
190:
191:
192: sub cleanup {
193: if (tied(%hash)){
194: &Apache::lonnet::logthis('Cleanup groupsort: hash');
195: unless (untie(%hash)) {
196: &Apache::lonnet::logthis('Failed cleanup groupsort: hash');
197: }
198: }
199: }
200:
201: # ---------------------------------------------------------------- Main Handler
202: sub handler {
203: my $r = shift;
204:
205: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
206: ['acts','catalogmode','mode']);
207: # color scheme
208: my $fileclr = '#ffffe6';
209: my $titleclr = '#ddffff';
210:
211: &Apache::loncommon::content_type($r,'text/html');
212: $r->send_http_header;
213: return OK if $r->header_only;
214:
215: # finish_import looks different for graphical or "simple" RAT
216: my $finishimport='';
217: if ($env{'form.mode'} eq 'simple' || $env{'form.mode'} eq '') {
218: $finishimport=(<<ENDSMP);
219: function finish_import() {
220: opener.document.forms.simpleedit.importdetail.value='';
221: for (var num=0; num<document.forms.groupsort.fnum.value; num++) {
222: opener.document.forms.simpleedit.importdetail.value+='&'+
223: escape(eval("document.forms.groupsort.title"+num+".value"))+'='+
224: escape(eval("document.forms.groupsort.filelink"+num+".value"));
225: }
226: opener.document.forms.simpleedit.submit();
227: self.close();
228: }
229: ENDSMP
230: } else {
231: $finishimport=(<<ENDADV);
232: function finish_import() {
233: var linkflag=false;
234: for (var num=0; num<document.forms.groupsort.fnum.value; num++) {
235: insertRowInLastRow();
236: placeResourceInLastRow(
237: eval("document.forms.groupsort.title"+num+".value"),
238: eval("document.forms.groupsort.filelink"+num+".value"),
239: linkflag
240: );
241: linkflag=true;
242: }
243: opener.editmode=0;
244: opener.notclear=0;
245: opener.linkmode=0;
246: opener.draw();
247: self.close();
248: }
249: ENDADV
250: }
251:
252: # output start of web page
253: my $html=&Apache::lonxml::xmlbegin();
254: $r->print(<<END);
255: $html
256: <head>
257: <title>The LearningOnline Network With CAPA Group Sorter</title>
258: <script language='javascript'>
259: function insertRowInLastRow() {
260: opener.insertrow(opener.maxrow);
261: opener.addobj(opener.maxrow,'e&2');
262: }
263: function placeResourceInLastRow (title,url,linkflag) {
264: opener.mostrecent=opener.newresource(opener.maxrow,2,opener.escape(title),
265: opener.escape(url),'false','normal');
266: opener.save();
267: if (linkflag) {
268: opener.joinres(opener.linkmode,opener.mostrecent,0);
269: }
270: opener.linkmode=opener.mostrecent;
271: }
272: $finishimport
273: function selectchange(val) {
274: var newval=0+eval("document.forms.groupsort.alt"+val+".selectedIndex");
275: orderchange(val,newval);
276: }
277: function move(val,newval) {
278: orderchange(val,newval);
279: }
280: function orderchange(val,newval) {
281: document.forms.groupsort.oldval.value=val;
282: document.forms.groupsort.newval.value=newval;
283: document.forms.groupsort.submit();
284: }
285: </script>
286: </head>
287: END
288: # read pertinent machine configuration
289: my $domain = $r->dir_config('lonDefDomain');
290: $iconpath = $r->dir_config('lonIconsURL') . "/";
291:
292: my %shash; # sort order (key is resource location, value is sort order)
293: my %thash; # title (key is resource location, value is title)
294:
295: &readfromdb($r,\%shash,\%thash);
296:
297: my $ctr = 0;
298: my $clen = scalar(keys %shash);
299: if ($clen > 1) {
300: my %lt=&Apache::lonlocal::texthash(
301: 'fin'=> 'Finalize order of resources',
302: 'gb' => 'Go Back',
303: 'ns' => 'New Search',
304: 'fi' => 'Finish Import',
305: 'ca' => 'Cancel',
306: 'co' => 'Change Order',
307: 'ti' => 'Title',
308: 'pa' => 'Path'
309: );
310: $r->print(&Apache::loncommon::bodytag('Sort Imported Resources'));
311: $r->print(<<END);
312: <b><font color="#888888">$lt{'fin'}</font></b>
313: <form method='post' action='/adm/groupsort' name='groupsort'
314: enctype='application/x-www-form-urlencoded'>
315: <input type="hidden" name="fnum" value="$clen" />
316: <input type="hidden" name="oldval" value="" />
317: <input type="hidden" name="newval" value="" />
318: <input type="hidden" name="mode" value="$env{'form.mode'}" />
319: END
320:
321: # --- Expand here if "GO BACK" button desired
322: if ($env{'form.catalogmode'} eq 'groupimport') {
323: my $resurl = &Apache::loncommon::lastresurl();
324: $r->print(<<END);
325: <input type="button" name="alter" value="$lt{'gb'}"
326: onClick="window.location='$resurl?catalogmode=groupimport'" />
327: END
328: }
329: if ($env{'form.catalogmode'} eq 'groupsearch') {
330: $r->print(<<END);
331: <input type="button" name="alter" value="$lt{'ns'}"
332: onClick="window.location='/adm/searchcat?catalogmode=groupsearch&cleargroupsort=1'" />
333: END
334: }
335: # ---
336:
337: $r->print(<<END);
338: <input type="button" name="alter" value="$lt{'fi'}"
339: onClick="finish_import()" />
340: <input type="button" name="alter" value="$lt{'ca'}" onClick="self.close()" />
341: END
342: $r->print("<table border='0'><tr><td bgcolor='#eeeeee'>");
343: $r->print("<table border=0><tr>\n");
344: $r->print("<td colspan='2' bgcolor='$titleclr'><b>$lt{'co'}</b></td>\n");
345: $r->print("<td colspan='2' bgcolor='$titleclr'><b>$lt{'ti'}</b></td>\n");
346: $r->print("<td bgcolor='$titleclr'><b>$lt{'pa'}</b></td></tr>\n");
347: } else {
348: $r->print(<<END);
349: <body>
350: <form method='post' action='/adm/groupsort' name='groupsort'
351: enctype='application/x-www-form-urlencoded'>
352: <input type="hidden" name="fnum" value="$clen" />
353: <input type="hidden" name="oldval" value="" />
354: <input type="hidden" name="newval" value="" />
355: <input type="hidden" name="mode" value="$env{'form.mode'}" />
356: END
357: }
358: foreach (sort {$shash{$a}<=>$shash{$b}} (keys %shash)) {
359: my $key=$_;
360: $ctr++;
361: my $iconname=&Apache::loncommon::icon($key);
362: if ($clen > 1) {
363: $r->print("<tr><td bgcolor='$fileclr'>");
364: $r->print(&movers($clen,$ctr));
365: }
366: $r->print(&hidden($ctr-1,$thash{$key},$key));
367: if ($clen > 1) {
368: $r->print("</td><td bgcolor='$fileclr'>");
369: $r->print(&select_box($clen,$ctr));
370: $r->print("</td><td bgcolor='$fileclr'>");
371: $r->print("<img src='$iconname' />");
372: $r->print("</td><td bgcolor='$fileclr'>");
373: $r->print("$thash{$key}</td><td bgcolor='$fileclr'>\n");
374: $r->print("$key</td></tr>\n");
375: }
376: }
377: if ($clen > 1) {
378: $r->print("</table></td></tr></table></form>");
379: } else {
380: $r->print(<<END);
381: <script type="text/javascript">
382: finish_import();
383: </script>
384: END
385: }
386: $r->print(<<END);
387: </body>
388: </html>
389: END
390:
391: return OK;
392: }
393:
394: # --------------------------------------- Hidden values (returns scalar string)
395: sub hidden {
396: my ($sel,$title,$filelink) = @_;
397: my $string = '<input type="hidden" name="title'.$sel.'" value="'.$title.
398: '" />';
399: $string .= '<input type="hidden" name="filelink'.$sel.'" value="'.
400: $filelink.'" />';
401: return $string;
402: }
403:
404: # --------------------------------------- Moving arrows (returns scalar string)
405: sub movers {
406: my ($total,$sel) = @_;
407: my $dsel = $sel-1;
408: my $usel = $sel+1;
409: $usel = 1 if $usel > $total;
410: $dsel = $total if $dsel < 1;
411: my $string;
412: $string = (<<END);
413: <table border='0' cellspacing='0' cellpadding='0'>
414: <tr><td><a href='javascript:move($sel,$dsel)'>
415: <img src="${iconpath}move_up.gif" alt='UP' border='0' /></a></td></tr>
416: <tr><td><a href='javascript:move($sel,$usel)'>
417: <img src="${iconpath}move_down.gif" alt='DOWN' border='0' /></a></td></tr>
418: </table>
419: END
420: return $string;
421: }
422:
423: # ------------------------------------------ Select box (returns scalar string)
424: sub select_box {
425: my ($total,$sel) = @_;
426: my $string;
427: $string = '<select name="alt'.$sel.'"';
428: $string .= " onChange='selectchange($sel)'>";
429: $string .= "<option name='o0' value='0'>remove</option>";
430: for my $cur (1..$total) {
431: $string .= "<option name='o$cur' value='$cur'";
432: if ($cur == $sel) {
433: $string .= "selected";
434: }
435: $string .= ">$cur</option>";
436: }
437: $string .= "</select>\n";
438: return $string;
439: }
440:
441: 1;
442:
443: __END__
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