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 1.5 2001/12/11 03:37:11 harris41 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: #
32: ###
33:
34: package Apache::groupsort;
35:
36: use strict;
37:
38: use Apache::Constants qw(:common);
39: use GDBM_File;
40:
41: my %hash; # variable to tie to user specific database
42: my $iconpath; # variable to be accessible to multiple subroutines
43:
44: # ---------------------------------------------------------------- Main Handler
45: sub handler {
46: my $r = shift;
47:
48: # color scheme
49: my $fileclr = '#ffffe6';
50: my $titleclr = '#ddffff';
51:
52: $r->content_type('text/html');
53: $r->send_http_header;
54: return OK if $r->header_only;
55:
56: # output start of web page
57: $r->print(<<END);
58: <html>
59: <head>
60: <title>The LearningOnline Network With CAPA Group Sorter</title>
61: <script language='javascript'>
62: function insertRowInLastRow() {
63: opener.insertrow(opener.maxrow);
64: opener.addobj(opener.maxrow,'e&2');
65: }
66: function placeResourceInLastRow (title,url,linkflag) {
67: opener.newresource(opener.maxrow,2,opener.escape(title),
68: opener.escape(url),'false','normal');
69: opener.save();
70: opener.mostrecent=opener.obj.length-1;
71: if (linkflag) {
72: opener.joinres(opener.linkmode,opener.mostrecent,0);
73: }
74: opener.linkmode=opener.mostrecent;
75: }
76: function finish_import() {
77: var linkflag=false;
78: for (var num=0; num<document.forms.groupsort.fnum.value; num++) {
79: insertRowInLastRow();
80: placeResourceInLastRow(
81: eval("document.forms.groupsort.title"+num+".value"),
82: eval("document.forms.groupsort.filelink"+num+".value"),
83: linkflag
84: );
85: linkflag=true;
86: }
87: opener.editmode=0;
88: opener.notclear=0;
89: opener.linkmode=0;
90: opener.infoclear();
91: opener.draw();
92: self.close();
93: }
94: function selectchange(val) {
95: var newval=0+eval("document.forms.groupsort.alt"+val+".selectedIndex");
96: orderchange(val,newval);
97: }
98: function move(val,newval) {
99: orderchange(val,newval);
100: }
101: function orderchange(val,newval) {
102: document.forms.groupsort.oldval.value=val;
103: document.forms.groupsort.newval.value=newval;
104: document.forms.groupsort.submit();
105: }
106: </script>
107: </head>
108: <body bgcolor="#FFFFFF">
109: END
110:
111: # read pertinent machine configuration
112: my $domain = $r->dir_config('lonDefDomain');
113: $iconpath = $r->dir_config('lonIconsURL') . "/";
114:
115: my %shash; # sort order (key is resource location, value is sort order)
116: my %thash; # title (key is resource location, value is title)
117: foreach (split(/&/,$ENV{'QUERY_STRING'})) {
118: my ($name, $value) = split(/=/,$_);
119: $value =~ tr/+/ /;
120: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
121: if ($name eq 'acts') {
122: $ENV{'form.'.$name}=$value;
123: }
124: if ($name eq 'catalogmode') {
125: $ENV{'form.'.$name}=$value;
126: }
127: }
128: my $diropendb;
129: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
130: $diropendb =
131: "/home/httpd/perl/tmp/$domain\_$ENV{'user.name'}_searchcat.db";
132: }
133: elsif ($ENV{'form.catalogmode'} eq 'groupimport') {
134: $diropendb =
135: "/home/httpd/perl/tmp/$domain\_$ENV{'user.name'}_indexer.db";
136: }
137: if (tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) {
138: my $acts = $ENV{'form.acts'};
139: my @Acts = split(/b/,$acts);
140: my %ahash;
141: my %achash;
142: my $ac = 0;
143: foreach (@Acts) {
144: my ($state,$ref) = split(/a/);
145: $ahash{$ref} = $state;
146: $achash{$ref} = $ac;
147: $ac++;
148: }
149: foreach (sort {$achash{$a} <=> $achash{$b}} (keys %ahash)) {
150: my $key = $_;
151: if ($ahash{$key} eq '1') {
152: # my $keyz=join("<br />",keys %hash);
153: # print "<br />$key<br />$keyz".$hash{'pre_'.$key.'_link'}."<br />\n";
154: $hash{'store_'.$hash{'pre_'.$key.'_link'}} =
155: $hash{'pre_'.$key.'_title'};
156: $hash{'storectr_'.$hash{'pre_'.$key.'_link'}} =
157: $hash{'storectr'}+0;
158: $hash{'storectr'}++;
159: }
160: if ($ahash{$key} eq '0') {
161: if ($hash{'store_'.$hash{'pre_'.$key.'_link'}}) {
162: delete $hash{'store_'.$hash{'pre_'.$key.'_link'}};
163: }
164: }
165: }
166: foreach (keys %hash) {
167: if ($_ =~ /^store_/) {
168: my $key = $_;
169: $key =~ s/^store_//;
170: $shash{$key} = $hash{'storectr_'.$key};
171: $thash{$key} = $hash{'store_'.$key};
172: }
173: }
174: if ($ENV{'form.oldval'}) {
175: my $newctr = 0;
176: my %chash;
177: foreach (sort {$shash{$a} <=> $shash{$b}} (keys %shash)) {
178: my $key = $_;
179: $newctr++;
180: $shash{$key} = $newctr;
181: $hash{'storectr_'.$key} = $newctr;
182: $chash{$newctr} = $key;
183: }
184: my $oldval = $ENV{'form.oldval'};
185: my $newval = $ENV{'form.newval'};
186: if ($oldval != $newval) {
187: # when newval==0, then push down and delete
188: if ($newval!=0) {
189: $shash{$chash{$oldval}} = $newval;
190: $hash{'storectr_'.$chash{$oldval}} = $newval;
191: }
192: else {
193: $shash{$chash{$oldval}} = $newctr;
194: $hash{'storectr_'.$chash{$oldval}} = $newctr;
195: }
196: if ($newval==0) { # push down
197: my $newval2=$newctr;
198: for my $idx ($oldval..($newval2-1)) {
199: $shash{$chash{$idx+1}} = $idx;
200: $hash{'storectr_'.$chash{$idx+1}} = $idx;
201: }
202: delete $shash{$chash{$oldval}};
203: delete $hash{'storectr_'.$chash{$oldval}};
204: delete $hash{'store_'.$chash{$oldval}};
205: }
206: elsif ($oldval < $newval) { # push down
207: for my $idx ($oldval..($newval-1)) {
208: $shash{$chash{$idx+1}} = $idx;
209: $hash{'storectr_'.$chash{$idx+1}} = $idx;
210: }
211: }
212: elsif ($oldval > $newval) { # push up
213: for my $idx (reverse($newval..($oldval-1))) {
214: $shash{$chash{$idx}} = $idx+1;
215: $hash{'storectr_'.$chash{$idx}} = $idx+1;
216: }
217: }
218: }
219: }
220: } else {
221: $r->print('Unable to tie hash to db file</body></html>');
222: return OK;
223: }
224: untie %hash;
225: my $ctr = 0;
226: my $clen = scalar(keys %shash);
227: $r->print('<h2><font color="#888888">The LearningOnline With CAPA '.
228: 'Group Sorter</font></h2>'."\n");
229: $r->print('<b><font color="#888888">Finalize order of resources</font>'.
230: '</b>'."\n");
231: $r->print("<form method='post' action='/adm/groupsort' name='groupsort' ".
232: "enctype='application/x-www-form-urlencoded'>");
233: $r->print(<<END);
234: <input type="hidden" name="fnum" value="$clen" />
235: <input type="hidden" name="oldval" value="" />
236: <input type="hidden" name="newval" value="" />
237: END
238: if ($ENV{'form.catalogmode'} eq 'groupimport') {
239: $r->print(<<END);
240: <input type="button" name="alter" value="GO BACK"
241: onClick="window.location='/res/?catalogmode=groupimport'" />
242: END
243: }
244: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
245: $r->print(<<END);
246: <input type="button" name="alter" value="GO BACK"
247: onClick="window.location='/adm/searchcat?catalogmode=groupsearch'" />
248: END
249: }
250: $r->print(<<END);
251: <input type="button" name="alter" value="FINISH IMPORT"
252: onClick="finish_import()" />
253: <input type="button" name="alter" value="CANCEL" onClick="self.close()" />
254: END
255: $r->print("<table border='0'><tr><td bgcolor='#eeeeee'>");
256: $r->print("<table border=0><tr>\n");
257: $r->print("<td colspan='2' bgcolor='$titleclr'><b>Change order</b></td>".
258: "\n");
259: $r->print("<td colspan='2' bgcolor='$titleclr'><b>Title</b></td>\n");
260: $r->print("<td bgcolor='$titleclr'><b>Path</b></td></tr>\n");
261: foreach (sort {$shash{$a}<=>$shash{$b}} (keys %shash)) {
262: my $key=$_;
263: $ctr++;
264: my @file_ext = split(/\./,$key);
265: my $curfext = $file_ext[scalar(@file_ext)-1];
266: $r->print("<tr><td bgcolor='$fileclr'>");
267: $r->print(&movers($clen,$ctr));
268: $r->print(&hidden($ctr-1,$thash{$key},$key));
269: $r->print("</td><td bgcolor='$fileclr'>");
270: $r->print(&select_box($clen,$ctr));
271: $r->print("</td><td bgcolor='$fileclr'>");
272: $r->print("<img src='$iconpath$curfext.gif'>");
273: $r->print("</td><td bgcolor='$fileclr'>");
274: $r->print("$thash{$key}</td><td bgcolor='$fileclr'>\n");
275: $r->print("$key</td></tr>\n");
276: }
277: $r->print("</table></td></tr></table></form>");
278: $r->print(<<END);
279: </body>
280: </html>
281: END
282: return OK;
283: }
284:
285: # --------------------------------------- Hidden values (returns scalar string)
286: sub hidden {
287: my ($sel,$title,$filelink) = @_;
288: my $string = '<input type="hidden" name="title'.$sel.'" value="'.$title.
289: '" />';
290: $string .= '<input type="hidden" name="filelink'.$sel.'" value="'.
291: $filelink.'" />';
292: return $string;
293: }
294:
295: # --------------------------------------- Moving arrows (returns scalar string)
296: sub movers {
297: my ($total,$sel) = @_;
298: my $dsel = $sel-1;
299: my $usel = $sel+1;
300: $usel = 1 if $usel > $total;
301: $dsel = $total if $dsel < 1;
302: my $string;
303: $string = (<<END);
304: <table border='0' cellspacing='0' cellpadding='0'>
305: <tr><td><a href='javascript:move($sel,$dsel)'>
306: <img src="${iconpath}move_up.gif" alt='UP' border='0' /></a></td></tr>
307: <tr><td><a href='javascript:move($sel,$usel)'>
308: <img src="${iconpath}move_down.gif" alt='DOWN' border='0' /></a></td></tr>
309: </table>
310: END
311: return $string;
312: }
313:
314: # ------------------------------------------ Select box (returns scalar string)
315: sub select_box {
316: my ($total,$sel) = @_;
317: my $string;
318: $string = '<select name="alt'.$sel.'"';
319: $string .= " onChange='selectchange($sel)'>";
320: $string .= "<option name='o0' value='0'>remove</option>";
321: for my $cur (1..$total) {
322: $string .= "<option name='o$cur' value='$cur'";
323: if ($cur == $sel) {
324: $string .= "selected";
325: }
326: $string .= ">$cur</option>";
327: }
328: $string .= "</select>\n";
329: return $string;
330: }
331:
332: 1;
333:
334: __END__
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