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 1.28 2004/05/18 14:26:34 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: # YEAR=2001
30: # YEAR=2002
31: #
32: ###
33:
34: package Apache::groupsort;
35:
36: use strict;
37:
38: use Apache::Constants qw(:common);
39: use GDBM_File;
40: use Apache::loncommon;
41: use Apache::lonlocal;
42: use Apache::lonnet;
43:
44: my %hash; # variable to tie to user specific database
45: my $iconpath; # variable to be accessible to multiple subroutines
46:
47: sub cleanup {
48: if (tied(%hash)){
49: &Apache::lonnet::logthis('Cleanup groupsort: hash');
50: unless (untie(%hash)) {
51: &Apache::lonnet::logthis('Failed cleanup groupsort: hash');
52: }
53: }
54: }
55:
56: # ---------------------------------------------------------------- Main Handler
57: sub handler {
58: my $r = shift;
59:
60: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
61: ['acts','catalogmode','mode']);
62: # color scheme
63: my $fileclr = '#ffffe6';
64: my $titleclr = '#ddffff';
65:
66: &Apache::loncommon::content_type($r,'text/html');
67: $r->send_http_header;
68: return OK if $r->header_only;
69:
70: # finish_import looks different for graphical or "simple" RAT
71: my $finishimport='';
72: if ($ENV{'form.mode'} eq 'simple' || $ENV{'form.mode'} eq '') {
73: $finishimport=(<<ENDSMP);
74: function finish_import() {
75: opener.document.forms.simpleedit.importdetail.value='';
76: for (var num=0; num<document.forms.groupsort.fnum.value; num++) {
77: opener.document.forms.simpleedit.importdetail.value+='&'+
78: escape(eval("document.forms.groupsort.title"+num+".value"))+'='+
79: escape(eval("document.forms.groupsort.filelink"+num+".value"));
80: }
81: opener.document.forms.simpleedit.submit();
82: self.close();
83: }
84: ENDSMP
85: } else {
86: $finishimport=(<<ENDADV);
87: function finish_import() {
88: var linkflag=false;
89: for (var num=0; num<document.forms.groupsort.fnum.value; num++) {
90: insertRowInLastRow();
91: placeResourceInLastRow(
92: eval("document.forms.groupsort.title"+num+".value"),
93: eval("document.forms.groupsort.filelink"+num+".value"),
94: linkflag
95: );
96: linkflag=true;
97: }
98: opener.editmode=0;
99: opener.notclear=0;
100: opener.linkmode=0;
101: opener.draw();
102: self.close();
103: }
104: ENDADV
105: }
106:
107: # output start of web page
108:
109: $r->print(<<END);
110: <html>
111: <head>
112: <title>The LearningOnline Network With CAPA Group Sorter</title>
113: <script language='javascript'>
114: function insertRowInLastRow() {
115: opener.insertrow(opener.maxrow);
116: opener.addobj(opener.maxrow,'e&2');
117: }
118: function placeResourceInLastRow (title,url,linkflag) {
119: opener.newresource(opener.maxrow,2,opener.escape(title),
120: opener.escape(url),'false','normal');
121: opener.save();
122: opener.mostrecent=opener.obj.length-1;
123: if (linkflag) {
124: opener.joinres(opener.linkmode,opener.mostrecent,0);
125: }
126: opener.linkmode=opener.mostrecent;
127: }
128: $finishimport
129: function selectchange(val) {
130: var newval=0+eval("document.forms.groupsort.alt"+val+".selectedIndex");
131: orderchange(val,newval);
132: }
133: function move(val,newval) {
134: orderchange(val,newval);
135: }
136: function orderchange(val,newval) {
137: document.forms.groupsort.oldval.value=val;
138: document.forms.groupsort.newval.value=newval;
139: document.forms.groupsort.submit();
140: }
141: </script>
142: </head>
143: END
144: # read pertinent machine configuration
145: my $domain = $r->dir_config('lonDefDomain');
146: $iconpath = $r->dir_config('lonIconsURL') . "/";
147:
148: my %shash; # sort order (key is resource location, value is sort order)
149: my %thash; # title (key is resource location, value is title)
150:
151: my $diropendb;
152: # ------------------------------ which file do we open? Easy if explictly given
153: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
154: $diropendb =
155: "/home/httpd/perl/tmp/$ENV{'user.domain'}_$ENV{'user.name'}_searchcat.db";
156: }
157: elsif ($ENV{'form.catalogmode'} eq 'groupimport') {
158: $diropendb =
159: "/home/httpd/perl/tmp/$ENV{'user.domain'}_$ENV{'user.name'}_indexer.db";
160: }
161: elsif ($ENV{'form.catalogmode'} eq 'groupsec') {
162: $diropendb =
163: "/home/httpd/perl/tmp/$ENV{'user.domain'}_$ENV{'user.name'}_groupsec.db";
164: }
165: # --------------------- not explicitly given, choose the one most recently used
166: else { # choose last accessed
167: my @dbfn;
168: my @dbst;
169:
170: $dbfn[0] =
171: "/home/httpd/perl/tmp/$ENV{'user.domain'}_$ENV{'user.name'}_searchcat.db";
172: $dbst[0]=-1;
173: if (-e $dbfn[0]) {
174: $dbst[0]=(stat($dbfn[0]))[9];
175: }
176: $dbfn[1] =
177: "/home/httpd/perl/tmp/$ENV{'user.domain'}_$ENV{'user.name'}_indexer.db";
178: $dbst[1]=-1;
179: if (-e $dbfn[1]) {
180: $dbst[1]=(stat($dbfn[1]))[9];
181: }
182: $dbfn[2] =
183: "/home/httpd/perl/tmp/$ENV{'user.domain'}_$ENV{'user.name'}_groupsec.db";
184: $dbst[2]=-1;
185: if (-e $dbfn[2]) {
186: $dbst[2]=(stat($dbfn[2]))[9];
187: }
188: # Expand here for more modes
189: # ....
190:
191: # Okay, find most recent existing
192:
193: my $newest=0;
194: $diropendb='';
195: for (my $i=0; $i<=$#dbfn; $i++) {
196: if ($dbst[$i]>$newest) {
197: $newest=$dbst[$i];
198: $diropendb=$dbfn[$i];
199: }
200: }
201:
202: }
203: # ----------------------------- diropendb is now the filename of the db to open
204: if (tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) {
205: my $acts = $ENV{'form.acts'};
206: my @Acts = split(/b/,$acts);
207: my %ahash;
208: my %achash;
209: my $ac = 0;
210: foreach (@Acts) {
211: my ($state,$ref) = split(/a/);
212: $ahash{$ref} = $state;
213: $achash{$ref} = $ac;
214: $ac++;
215: }
216: foreach (sort {$achash{$a} <=> $achash{$b}} (keys %ahash)) {
217: my $key = $_;
218: if ($ahash{$key} eq '1') {
219: # my $keyz=join("<br />",keys %hash);
220: # print "<br />$key<br />$keyz".$hash{'pre_'.$key.'_link'}."<br />\n";
221: $hash{'store_'.$hash{'pre_'.$key.'_link'}} =
222: $hash{'pre_'.$key.'_title'};
223: $hash{'storectr_'.$hash{'pre_'.$key.'_link'}} =
224: $hash{'storectr'}+0;
225: $hash{'storectr'}++;
226: }
227: if ($ahash{$key} eq '0') {
228: if ($hash{'store_'.$hash{'pre_'.$key.'_link'}}) {
229: delete $hash{'store_'.$hash{'pre_'.$key.'_link'}};
230: }
231: }
232: }
233: foreach (keys %hash) {
234: if ($_ =~ /^store_/) {
235: my $key = $_;
236: $key =~ s/^store_//;
237: $shash{$key} = $hash{'storectr_'.$key};
238: if (&Apache::lonnet::gettitle($key) eq '') {
239: $thash{$key} = $hash{'store_'.$key};
240: } else {
241: $thash{$key} = &Apache::lonnet::gettitle($key);
242: }
243: }
244: }
245: if ($ENV{'form.oldval'}) {
246: my $newctr = 0;
247: my %chash;
248: foreach (sort {$shash{$a} <=> $shash{$b}} (keys %shash)) {
249: my $key = $_;
250: $newctr++;
251: $shash{$key} = $newctr;
252: $hash{'storectr_'.$key} = $newctr;
253: $chash{$newctr} = $key;
254: }
255: my $oldval = $ENV{'form.oldval'};
256: my $newval = $ENV{'form.newval'};
257: if ($oldval != $newval) {
258: # when newval==0, then push down and delete
259: if ($newval!=0) {
260: $shash{$chash{$oldval}} = $newval;
261: $hash{'storectr_'.$chash{$oldval}} = $newval;
262: }
263: else {
264: $shash{$chash{$oldval}} = $newctr;
265: $hash{'storectr_'.$chash{$oldval}} = $newctr;
266: }
267: if ($newval==0) { # push down
268: my $newval2=$newctr;
269: for my $idx ($oldval..($newval2-1)) {
270: $shash{$chash{$idx+1}} = $idx;
271: $hash{'storectr_'.$chash{$idx+1}} = $idx;
272: }
273: delete $shash{$chash{$oldval}};
274: delete $hash{'storectr_'.$chash{$oldval}};
275: delete $hash{'store_'.$chash{$oldval}};
276: }
277: elsif ($oldval < $newval) { # push down
278: for my $idx ($oldval..($newval-1)) {
279: $shash{$chash{$idx+1}} = $idx;
280: $hash{'storectr_'.$chash{$idx+1}} = $idx;
281: }
282: }
283: elsif ($oldval > $newval) { # push up
284: for my $idx (reverse($newval..($oldval-1))) {
285: $shash{$chash{$idx}} = $idx+1;
286: $hash{'storectr_'.$chash{$idx}} = $idx+1;
287: }
288: }
289: }
290: }
291: } else {
292: $r->print('Unable to tie hash to db file</body></html>');
293: return OK;
294: }
295: untie %hash;
296: my $ctr = 0;
297: my $clen = scalar(keys %shash);
298: if ($clen > 1) {
299: my %lt=&Apache::lonlocal::texthash(
300: 'fin'=> 'Finalize order of resources',
301: 'gb' => 'Go Back',
302: 'ns' => 'New Search',
303: 'fi' => 'Finish Import',
304: 'ca' => 'Cancel',
305: 'co' => 'Change Order',
306: 'ti' => 'Title',
307: 'pa' => 'Path'
308: );
309: $r->print(&Apache::loncommon::bodytag('Sort Imported Resources'));
310: $r->print(<<END);
311: <b><font color="#888888">$lt{'fin'}</font></b>
312: <form method='post' action='/adm/groupsort' name='groupsort'
313: enctype='application/x-www-form-urlencoded'>
314: <input type="hidden" name="fnum" value="$clen" />
315: <input type="hidden" name="oldval" value="" />
316: <input type="hidden" name="newval" value="" />
317: <input type="hidden" name="mode" value="$ENV{'form.mode'}" />
318: END
319:
320: # --- Expand here if "GO BACK" button desired
321: if ($ENV{'form.catalogmode'} eq 'groupimport') {
322: $r->print(<<END);
323: <input type="button" name="alter" value="$lt{'gb'}"
324: onClick="window.location='/res/?catalogmode=groupimport'" />
325: END
326: }
327: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
328: $r->print(<<END);
329: <input type="button" name="alter" value="$lt{'ns'}"
330: onClick="window.location='/adm/searchcat?catalogmode=groupsearch&cleargroupsort=1'" />
331: END
332: }
333: # ---
334:
335: $r->print(<<END);
336: <input type="button" name="alter" value="$lt{'fi'}"
337: onClick="finish_import()" />
338: <input type="button" name="alter" value="$lt{'ca'}" onClick="self.close()" />
339: END
340: $r->print("<table border='0'><tr><td bgcolor='#eeeeee'>");
341: $r->print("<table border=0><tr>\n");
342: $r->print("<td colspan='2' bgcolor='$titleclr'><b>$lt{'co'}</b></td>\n");
343: $r->print("<td colspan='2' bgcolor='$titleclr'><b>$lt{'ti'}</b></td>\n");
344: $r->print("<td bgcolor='$titleclr'><b>$lt{'pa'}</b></td></tr>\n");
345: } else {
346: $r->print(<<END);
347: <body>
348: <form method='post' action='/adm/groupsort' name='groupsort'
349: enctype='application/x-www-form-urlencoded'>
350: <input type="hidden" name="fnum" value="$clen" />
351: <input type="hidden" name="oldval" value="" />
352: <input type="hidden" name="newval" value="" />
353: <input type="hidden" name="mode" value="$ENV{'form.mode'}" />
354: END
355: }
356: foreach (sort {$shash{$a}<=>$shash{$b}} (keys %shash)) {
357: my $key=$_;
358: $ctr++;
359: my $iconname=&Apache::loncommon::icon($key);
360: if ($clen > 1) {
361: $r->print("<tr><td bgcolor='$fileclr'>");
362: $r->print(&movers($clen,$ctr));
363: }
364: $r->print(&hidden($ctr-1,$thash{$key},$key));
365: if ($clen > 1) {
366: $r->print("</td><td bgcolor='$fileclr'>");
367: $r->print(&select_box($clen,$ctr));
368: $r->print("</td><td bgcolor='$fileclr'>");
369: $r->print("<img src='$iconname' />");
370: $r->print("</td><td bgcolor='$fileclr'>");
371: $r->print("$thash{$key}</td><td bgcolor='$fileclr'>\n");
372: $r->print("$key</td></tr>\n");
373: }
374: }
375: if ($clen > 1) {
376: $r->print("</table></td></tr></table></form>");
377: } else {
378: $r->print(<<END);
379: <script type="text/javascript">
380: finish_import();
381: </script>
382: END
383: }
384: $r->print(<<END);
385: </body>
386: </html>
387: END
388:
389: return OK;
390: }
391:
392: # --------------------------------------- Hidden values (returns scalar string)
393: sub hidden {
394: my ($sel,$title,$filelink) = @_;
395: my $string = '<input type="hidden" name="title'.$sel.'" value="'.$title.
396: '" />';
397: $string .= '<input type="hidden" name="filelink'.$sel.'" value="'.
398: $filelink.'" />';
399: return $string;
400: }
401:
402: # --------------------------------------- Moving arrows (returns scalar string)
403: sub movers {
404: my ($total,$sel) = @_;
405: my $dsel = $sel-1;
406: my $usel = $sel+1;
407: $usel = 1 if $usel > $total;
408: $dsel = $total if $dsel < 1;
409: my $string;
410: $string = (<<END);
411: <table border='0' cellspacing='0' cellpadding='0'>
412: <tr><td><a href='javascript:move($sel,$dsel)'>
413: <img src="${iconpath}move_up.gif" alt='UP' border='0' /></a></td></tr>
414: <tr><td><a href='javascript:move($sel,$usel)'>
415: <img src="${iconpath}move_down.gif" alt='DOWN' border='0' /></a></td></tr>
416: </table>
417: END
418: return $string;
419: }
420:
421: # ------------------------------------------ Select box (returns scalar string)
422: sub select_box {
423: my ($total,$sel) = @_;
424: my $string;
425: $string = '<select name="alt'.$sel.'"';
426: $string .= " onChange='selectchange($sel)'>";
427: $string .= "<option name='o0' value='0'>remove</option>";
428: for my $cur (1..$total) {
429: $string .= "<option name='o$cur' value='$cur'";
430: if ($cur == $sel) {
431: $string .= "selected";
432: }
433: $string .= ">$cur</option>";
434: }
435: $string .= "</select>\n";
436: return $string;
437: }
438:
439: 1;
440:
441: __END__
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