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 1.13 2002/08/12 18:21:42 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: # 8/7,8/8,10/14,10/15,12/10 Scott Harrison
31: # YEAR=2002
32: # 1/17 Scott Harrison
33: #
34: ###
35:
36: package Apache::groupsort;
37:
38: use strict;
39:
40: use Apache::Constants qw(:common);
41: use GDBM_File;
42:
43: my %hash; # variable to tie to user specific database
44: my $iconpath; # variable to be accessible to multiple subroutines
45:
46: # ---------------------------------------------------------------- Main Handler
47: sub handler {
48: my $r = shift;
49:
50: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
51: ['acts','catalogmode','mode']);
52:
53: # color scheme
54: my $fileclr = '#ffffe6';
55: my $titleclr = '#ddffff';
56:
57: $r->content_type('text/html');
58: $r->send_http_header;
59: return OK if $r->header_only;
60:
61: # finish_import looks different for graphical or "simple" RAT
62: my $finishimport='';
63: if ($ENV{'form.mode'} eq 'simple') {
64: $finishimport=(<<ENDSMP);
65: function finish_import() {
66: opener.document.forms.simpleedit.importdetail.value='';
67: for (var num=0; num<document.forms.groupsort.fnum.value; num++) {
68: opener.document.forms.simpleedit.importdetail.value+='&'+
69: escape(eval("document.forms.groupsort.title"+num+".value"))+'='+
70: escape(eval("document.forms.groupsort.filelink"+num+".value"));
71: }
72: opener.document.forms.simpleedit.submit();
73: self.close();
74: }
75: ENDSMP
76: } else {
77: $finishimport=(<<ENDADV);
78: function finish_import() {
79: var linkflag=false;
80: for (var num=0; num<document.forms.groupsort.fnum.value; num++) {
81: insertRowInLastRow();
82: placeResourceInLastRow(
83: eval("document.forms.groupsort.title"+num+".value"),
84: eval("document.forms.groupsort.filelink"+num+".value"),
85: linkflag
86: );
87: linkflag=true;
88: }
89: opener.editmode=0;
90: opener.notclear=0;
91: opener.linkmode=0;
92: opener.draw();
93: self.close();
94: }
95: ENDADV
96: }
97:
98: # output start of web page
99:
100: $r->print(<<END);
101: <html>
102: <head>
103: <title>The LearningOnline Network With CAPA Group Sorter</title>
104: <script language='javascript'>
105: function insertRowInLastRow() {
106: opener.insertrow(opener.maxrow);
107: opener.addobj(opener.maxrow,'e&2');
108: }
109: function placeResourceInLastRow (title,url,linkflag) {
110: opener.newresource(opener.maxrow,2,opener.escape(title),
111: opener.escape(url),'false','normal');
112: opener.save();
113: opener.mostrecent=opener.obj.length-1;
114: if (linkflag) {
115: opener.joinres(opener.linkmode,opener.mostrecent,0);
116: }
117: opener.linkmode=opener.mostrecent;
118: }
119: $finishimport
120: function selectchange(val) {
121: var newval=0+eval("document.forms.groupsort.alt"+val+".selectedIndex");
122: orderchange(val,newval);
123: }
124: function move(val,newval) {
125: orderchange(val,newval);
126: }
127: function orderchange(val,newval) {
128: document.forms.groupsort.oldval.value=val;
129: document.forms.groupsort.newval.value=newval;
130: document.forms.groupsort.submit();
131: }
132: </script>
133: </head>
134: <body bgcolor="#FFFFFF">
135: END
136:
137: # read pertinent machine configuration
138: my $domain = $r->dir_config('lonDefDomain');
139: $iconpath = $r->dir_config('lonIconsURL') . "/";
140:
141: my %shash; # sort order (key is resource location, value is sort order)
142: my %thash; # title (key is resource location, value is title)
143:
144: my $diropendb;
145: # ------------------------------ which file do we open? Easy if explictly given
146: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
147: $diropendb =
148: "/home/httpd/perl/tmp/$domain\_$ENV{'user.name'}_searchcat.db";
149: }
150: elsif ($ENV{'form.catalogmode'} eq 'groupimport') {
151: $diropendb =
152: "/home/httpd/perl/tmp/$domain\_$ENV{'user.name'}_indexer.db";
153: }
154: elsif ($ENV{'form.catalogmode'} eq 'groupsec') {
155: $diropendb =
156: "/home/httpd/perl/tmp/$domain\_$ENV{'user.name'}_groupsec.db";
157: }
158: # --------------------- not explicitly given, choose the one most recently used
159: else { # choose last accessed
160: my @dbfn;
161: my @dbst;
162:
163: $dbfn[0] =
164: "/home/httpd/perl/tmp/$domain\_$ENV{'user.name'}_searchcat.db";
165: $dbst[0]=-1;
166: if (-e $dbfn[0]) {
167: $dbst[0]=(stat($dbfn[0]))[9];
168: }
169: $dbfn[1] =
170: "/home/httpd/perl/tmp/$domain\_$ENV{'user.name'}_indexer.db";
171: $dbst[1]=-1;
172: if (-e $dbfn[1]) {
173: $dbst[1]=(stat($dbfn[1]))[9];
174: }
175: $dbfn[2] =
176: "/home/httpd/perl/tmp/$domain\_$ENV{'user.name'}_groupsec.db";
177: $dbst[2]=-1;
178: if (-e $dbfn[2]) {
179: $dbst[2]=(stat($dbfn[2]))[9];
180: }
181: # Expand here for more modes
182: # ....
183:
184: # Okay, find most recent existing
185:
186: my $newest=0;
187: $diropendb='';
188: for (my $i=0; $i<=$#dbfn; $i++) {
189: if ($dbst[$i]>$newest) {
190: $newest=$dbst[$i];
191: $diropendb=$dbfn[$i];
192: }
193: }
194:
195: }
196: # ----------------------------- diropendb is now the filename of the db to open
197: if (tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) {
198: my $acts = $ENV{'form.acts'};
199: my @Acts = split(/b/,$acts);
200: my %ahash;
201: my %achash;
202: my $ac = 0;
203: foreach (@Acts) {
204: my ($state,$ref) = split(/a/);
205: $ahash{$ref} = $state;
206: $achash{$ref} = $ac;
207: $ac++;
208: }
209: foreach (sort {$achash{$a} <=> $achash{$b}} (keys %ahash)) {
210: my $key = $_;
211: if ($ahash{$key} eq '1') {
212: # my $keyz=join("<br />",keys %hash);
213: # print "<br />$key<br />$keyz".$hash{'pre_'.$key.'_link'}."<br />\n";
214: $hash{'store_'.$hash{'pre_'.$key.'_link'}} =
215: $hash{'pre_'.$key.'_title'};
216: $hash{'storectr_'.$hash{'pre_'.$key.'_link'}} =
217: $hash{'storectr'}+0;
218: $hash{'storectr'}++;
219: }
220: if ($ahash{$key} eq '0') {
221: if ($hash{'store_'.$hash{'pre_'.$key.'_link'}}) {
222: delete $hash{'store_'.$hash{'pre_'.$key.'_link'}};
223: }
224: }
225: }
226: foreach (keys %hash) {
227: if ($_ =~ /^store_/) {
228: my $key = $_;
229: $key =~ s/^store_//;
230: $shash{$key} = $hash{'storectr_'.$key};
231: $thash{$key} = $hash{'store_'.$key};
232: }
233: }
234: if ($ENV{'form.oldval'}) {
235: my $newctr = 0;
236: my %chash;
237: foreach (sort {$shash{$a} <=> $shash{$b}} (keys %shash)) {
238: my $key = $_;
239: $newctr++;
240: $shash{$key} = $newctr;
241: $hash{'storectr_'.$key} = $newctr;
242: $chash{$newctr} = $key;
243: }
244: my $oldval = $ENV{'form.oldval'};
245: my $newval = $ENV{'form.newval'};
246: if ($oldval != $newval) {
247: # when newval==0, then push down and delete
248: if ($newval!=0) {
249: $shash{$chash{$oldval}} = $newval;
250: $hash{'storectr_'.$chash{$oldval}} = $newval;
251: }
252: else {
253: $shash{$chash{$oldval}} = $newctr;
254: $hash{'storectr_'.$chash{$oldval}} = $newctr;
255: }
256: if ($newval==0) { # push down
257: my $newval2=$newctr;
258: for my $idx ($oldval..($newval2-1)) {
259: $shash{$chash{$idx+1}} = $idx;
260: $hash{'storectr_'.$chash{$idx+1}} = $idx;
261: }
262: delete $shash{$chash{$oldval}};
263: delete $hash{'storectr_'.$chash{$oldval}};
264: delete $hash{'store_'.$chash{$oldval}};
265: }
266: elsif ($oldval < $newval) { # push down
267: for my $idx ($oldval..($newval-1)) {
268: $shash{$chash{$idx+1}} = $idx;
269: $hash{'storectr_'.$chash{$idx+1}} = $idx;
270: }
271: }
272: elsif ($oldval > $newval) { # push up
273: for my $idx (reverse($newval..($oldval-1))) {
274: $shash{$chash{$idx}} = $idx+1;
275: $hash{'storectr_'.$chash{$idx}} = $idx+1;
276: }
277: }
278: }
279: }
280: } else {
281: $r->print('Unable to tie hash to db file</body></html>');
282: return OK;
283: }
284: untie %hash;
285: my $ctr = 0;
286: my $clen = scalar(keys %shash);
287: $r->print('<h2><font color="#888888">The LearningOnline Network With CAPA '.
288: 'Group Sorter</font></h2>'."\n");
289: $r->print('<b><font color="#888888">Finalize order of resources</font>'.
290: '</b>'."\n");
291: $r->print("<form method='post' action='/adm/groupsort' name='groupsort' ".
292: "enctype='application/x-www-form-urlencoded'>");
293: $r->print(<<END);
294: <input type="hidden" name="fnum" value="$clen" />
295: <input type="hidden" name="oldval" value="" />
296: <input type="hidden" name="newval" value="" />
297: END
298:
299: # --- Expand here if "GO BACK" button desired
300: if ($ENV{'form.catalogmode'} eq 'groupimport') {
301: $r->print(<<END);
302: <input type="button" name="alter" value="GO BACK"
303: onClick="window.location='/res/?catalogmode=groupimport'" />
304: END
305: }
306: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
307: $r->print(<<END);
308: <input type="button" name="alter" value="GO BACK"
309: onClick="window.location='/adm/searchcat?catalogmode=groupsearch'" />
310: END
311: }
312: # ---
313:
314: $r->print(<<END);
315: <input type="button" name="alter" value="FINISH IMPORT"
316: onClick="finish_import()" />
317: <input type="button" name="alter" value="CANCEL" onClick="self.close()" />
318: END
319: $r->print("<table border='0'><tr><td bgcolor='#eeeeee'>");
320: $r->print("<table border=0><tr>\n");
321: $r->print("<td colspan='2' bgcolor='$titleclr'><b>Change order</b></td>".
322: "\n");
323: $r->print("<td colspan='2' bgcolor='$titleclr'><b>Title</b></td>\n");
324: $r->print("<td bgcolor='$titleclr'><b>Path</b></td></tr>\n");
325: foreach (sort {$shash{$a}<=>$shash{$b}} (keys %shash)) {
326: my $key=$_;
327: $ctr++;
328: my @file_ext = split(/\./,$key);
329: my $curfext = $file_ext[scalar(@file_ext)-1];
330: $r->print("<tr><td bgcolor='$fileclr'>");
331: $r->print(&movers($clen,$ctr));
332: $r->print(&hidden($ctr-1,$thash{$key},$key));
333: $r->print("</td><td bgcolor='$fileclr'>");
334: $r->print(&select_box($clen,$ctr));
335: $r->print("</td><td bgcolor='$fileclr'>");
336: $r->print("<img src='$iconpath$curfext.gif'>");
337: $r->print("</td><td bgcolor='$fileclr'>");
338: $r->print("$thash{$key}</td><td bgcolor='$fileclr'>\n");
339: $r->print("$key</td></tr>\n");
340: }
341: $r->print("</table></td></tr></table></form>");
342: $r->print(<<END);
343: </body>
344: </html>
345: END
346: return OK;
347: }
348:
349: # --------------------------------------- Hidden values (returns scalar string)
350: sub hidden {
351: my ($sel,$title,$filelink) = @_;
352: my $string = '<input type="hidden" name="title'.$sel.'" value="'.$title.
353: '" />';
354: $string .= '<input type="hidden" name="filelink'.$sel.'" value="'.
355: $filelink.'" />';
356: return $string;
357: }
358:
359: # --------------------------------------- Moving arrows (returns scalar string)
360: sub movers {
361: my ($total,$sel) = @_;
362: my $dsel = $sel-1;
363: my $usel = $sel+1;
364: $usel = 1 if $usel > $total;
365: $dsel = $total if $dsel < 1;
366: my $string;
367: $string = (<<END);
368: <table border='0' cellspacing='0' cellpadding='0'>
369: <tr><td><a href='javascript:move($sel,$dsel)'>
370: <img src="${iconpath}move_up.gif" alt='UP' border='0' /></a></td></tr>
371: <tr><td><a href='javascript:move($sel,$usel)'>
372: <img src="${iconpath}move_down.gif" alt='DOWN' border='0' /></a></td></tr>
373: </table>
374: END
375: return $string;
376: }
377:
378: # ------------------------------------------ Select box (returns scalar string)
379: sub select_box {
380: my ($total,$sel) = @_;
381: my $string;
382: $string = '<select name="alt'.$sel.'"';
383: $string .= " onChange='selectchange($sel)'>";
384: $string .= "<option name='o0' value='0'>remove</option>";
385: for my $cur (1..$total) {
386: $string .= "<option name='o$cur' value='$cur'";
387: if ($cur == $sel) {
388: $string .= "selected";
389: }
390: $string .= ">$cur</option>";
391: }
392: $string .= "</select>\n";
393: return $string;
394: }
395:
396: 1;
397:
398: __END__
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