1: # The LearningOnline Network with CAPA
2: #
3: # The LON-CAPA group sort handler
4: #
5: # Allows for sorting prior to import into RAT.
6: #
7: # YEAR=2001
8: # 8/7,8/8,10/14,10/15 Scott Harrison
9:
10: package Apache::groupsort;
11:
12: use strict;
13:
14: use Apache::Constants qw(:common);
15: use GDBM_File;
16:
17: my %hash; # variable to tie to user specific database
18: my $iconpath; # variable to be accessible to multiple subroutines
19:
20: # ---------------------------------------------------------------- Main Handler
21: sub handler {
22: my $r = shift;
23:
24: # color scheme
25: my $fileclr = '#ffffe6';
26: my $titleclr = '#ddffff';
27:
28: $r->content_type('text/html');
29: $r->send_http_header;
30: return OK if $r->header_only;
31:
32: # output start of web page
33: $r->print(<<END);
34: <html>
35: <head>
36: <title>The LearningOnline Network With CAPA Group Sorter</title>
37: <script language='javascript'>
38: function insertRowInLastRow() {
39: opener.insertrow(opener.maxrow);
40: opener.addobj(opener.maxrow,'e&2');
41: }
42: function placeResourceInLastRow (title,url,linkflag) {
43: opener.newresource(opener.maxrow,2,opener.escape(title),
44: opener.escape(url),'false','normal');
45: opener.save();
46: opener.mostrecent=opener.obj.length-1;
47: if (linkflag) {
48: opener.joinres(opener.linkmode,opener.mostrecent,0);
49: }
50: opener.linkmode=opener.mostrecent;
51: }
52: function finish_import() {
53: var linkflag=false;
54: for (var num=0; num<document.forms.groupsort.fnum.value; num++) {
55: insertRowInLastRow();
56: placeResourceInLastRow(
57: eval("document.forms.groupsort.title"+num+".value"),
58: eval("document.forms.groupsort.filelink"+num+".value"),
59: linkflag
60: );
61: linkflag=true;
62: }
63: opener.editmode=0;
64: opener.notclear=0;
65: opener.linkmode=0;
66: opener.infoclear();
67: opener.draw();
68: self.close();
69: }
70: function selectchange(val) {
71: var newval=0+eval("document.forms.groupsort.alt"+val+".selectedIndex");
72: orderchange(val,newval);
73: }
74: function move(val,newval) {
75: orderchange(val,newval);
76: }
77: function orderchange(val,newval) {
78: document.forms.groupsort.oldval.value=val;
79: document.forms.groupsort.newval.value=newval;
80: document.forms.groupsort.submit();
81: }
82: </script>
83: </head>
84: <body bgcolor="#FFFFFF">
85: END
86:
87: # read pertinent machine configuration
88: my $domain = $r->dir_config('lonDefDomain');
89: $iconpath = $r->dir_config('lonIconsURL') . "/";
90: my $diropendb =
91: "/home/httpd/perl/tmp/$domain\_$ENV{'user.name'}_indexer.db";
92:
93: my %shash; # sort order (key is resource location, value is sort order)
94: my %thash; # title (key is resource location, value is title)
95: map {
96: my ($name, $value) = split(/=/,$_);
97: $value =~ tr/+/ /;
98: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
99: if ($name eq 'acts') {
100: $ENV{'form.'.$name}=$value;
101: }
102: if ($name eq 'catalogmode') {
103: $ENV{'form.'.$name}=$value;
104: }
105: } (split(/&/,$ENV{'QUERY_STRING'}));
106: if (tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) {
107: my $acts = $ENV{'form.acts'};
108: my @Acts = split(/b/,$acts);
109: my %ahash;
110: my %achash;
111: my $ac = 0;
112: map {
113: my ($state,$ref) = split(/a/);
114: $ahash{$ref} = $state;
115: $achash{$ref} = $ac;
116: $ac++;
117: } (@Acts);
118: map {
119: my $key = $_;
120: if ($ahash{$key} eq '1') {
121: # my $keyz=join("<br />",keys %hash);
122: # print "<br />$key<br />$keyz".$hash{'pre_'.$key.'_link'}."<br />\n";
123: $hash{'store_'.$hash{'pre_'.$key.'_link'}} =
124: $hash{'pre_'.$key.'_title'};
125: $hash{'storectr_'.$hash{'pre_'.$key.'_link'}} =
126: $hash{'storectr'}+0;
127: $hash{'storectr'}++;
128: }
129: if ($ahash{$key} eq '0') {
130: if ($hash{'store_'.$hash{'pre_'.$key.'_link'}}) {
131: delete $hash{'store_'.$hash{'pre_'.$key.'_link'}};
132: }
133: }
134: } sort {$achash{$a} <=> $achash{$b}} (keys %ahash);
135: map {
136: if ($_ =~ /^store_/) {
137: my $key = $_;
138: $key =~ s/^store_//;
139: $shash{$key} = $hash{'storectr_'.$key};
140: $thash{$key} = $hash{'store_'.$key};
141: }
142: } keys %hash;
143: if ($ENV{'form.oldval'}) {
144: my $newctr = 0;
145: my %chash;
146: map {
147: my $key = $_;
148: $newctr++;
149: $shash{$key} = $newctr;
150: $hash{'storectr_'.$key} = $newctr;
151: $chash{$newctr} = $key;
152: } sort {$shash{$a} <=> $shash{$b}} (keys %shash);
153: my $oldval = $ENV{'form.oldval'};
154: my $newval = $ENV{'form.newval'};
155: if ($oldval != $newval) {
156: # when newval==0, then push down and delete
157: if ($newval!=0) {
158: $shash{$chash{$oldval}} = $newval;
159: $hash{'storectr_'.$chash{$oldval}} = $newval;
160: }
161: else {
162: $shash{$chash{$oldval}} = $newctr;
163: $hash{'storectr_'.$chash{$oldval}} = $newctr;
164: }
165: if ($newval==0) { # push down
166: my $newval2=$newctr;
167: for my $idx ($oldval..($newval2-1)) {
168: $shash{$chash{$idx+1}} = $idx;
169: $hash{'storectr_'.$chash{$idx+1}} = $idx;
170: }
171: delete $shash{$chash{$oldval}};
172: delete $hash{'storectr_'.$chash{$oldval}};
173: delete $hash{'store_'.$chash{$oldval}};
174: }
175: elsif ($oldval < $newval) { # push down
176: for my $idx ($oldval..($newval-1)) {
177: $shash{$chash{$idx+1}} = $idx;
178: $hash{'storectr_'.$chash{$idx+1}} = $idx;
179: }
180: }
181: elsif ($oldval > $newval) { # push up
182: for my $idx (reverse($newval..($oldval-1))) {
183: $shash{$chash{$idx}} = $idx+1;
184: $hash{'storectr_'.$chash{$idx}} = $idx+1;
185: }
186: }
187: }
188: }
189: } else {
190: $r->print('Unable to tie hash to db file</body></html>');
191: return OK;
192: }
193: untie %hash;
194: my $ctr = 0;
195: my $clen = scalar(keys %shash);
196: $r->print('<h2><font color="#888888">The LearningOnline With CAPA '.
197: 'Group Sorter</font></h2>'."\n");
198: $r->print('<b><font color="#888888">Finalize order of resources</font>'.
199: '</b>'."\n");
200: $r->print("<form method='post' action='/adm/groupsort' name='groupsort' ".
201: "enctype='application/x-www-form-urlencoded'>");
202: $r->print(<<END);
203: <input type="hidden" name="fnum" value="$clen" />
204: <input type="hidden" name="oldval" value="" />
205: <input type="hidden" name="newval" value="" />
206: END
207: if ($ENV{'form.catalogmode'} eq 'groupimport') {
208: $r->print(<<END);
209: <input type="button" name="alter" value="GO BACK"
210: onClick="window.location='/res/?catalogmode=groupimport'" />
211: END
212: }
213: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
214: $r->print(<<END);
215: <input type="button" name="alter" value="GO BACK"
216: onClick="window.location='/adm/searchcat?catalogmode=groupsearch'" />
217: END
218: }
219: $r->print(<<END);
220: <input type="button" name="alter" value="FINISH IMPORT"
221: onClick="finish_import()" />
222: <input type="button" name="alter" value="CANCEL" onClick="self.close()" />
223: END
224: $r->print("<table border='0'><tr><td bgcolor='#eeeeee'>");
225: $r->print("<table border=0><tr>\n");
226: $r->print("<td colspan='2' bgcolor='$titleclr'><b>Change order</b></td>".
227: "\n");
228: $r->print("<td colspan='2' bgcolor='$titleclr'><b>Title</b></td>\n");
229: $r->print("<td bgcolor='$titleclr'><b>Path</b></td></tr>\n");
230: map {
231: my $key=$_;
232: $ctr++;
233: my @file_ext = split(/\./,$key);
234: my $curfext = $file_ext[scalar(@file_ext)-1];
235: $r->print("<tr><td bgcolor='$fileclr'>");
236: $r->print(&movers($clen,$ctr));
237: $r->print(&hidden($ctr-1,$thash{$key},$key));
238: $r->print("</td><td bgcolor='$fileclr'>");
239: $r->print(&select_box($clen,$ctr));
240: $r->print("</td><td bgcolor='$fileclr'>");
241: $r->print("<img src='$iconpath$curfext.gif'>");
242: $r->print("</td><td bgcolor='$fileclr'>");
243: $r->print("$thash{$key}</td><td bgcolor='$fileclr'>\n");
244: $r->print("$key</td></tr>\n");
245: } sort {$shash{$a}<=>$shash{$b}} (keys %shash);
246: $r->print("</table></td></tr></table></form>");
247: $r->print(<<END);
248: </body>
249: </html>
250: END
251: return OK;
252: }
253:
254: # --------------------------------------- Hidden values (returns scalar string)
255: sub hidden {
256: my ($sel,$title,$filelink) = @_;
257: my $string = '<input type="hidden" name="title'.$sel.'" value="'.$title.
258: '" />';
259: $string .= '<input type="hidden" name="filelink'.$sel.'" value="'.
260: $filelink.'" />';
261: return $string;
262: }
263:
264: # --------------------------------------- Moving arrows (returns scalar string)
265: sub movers {
266: my ($total,$sel) = @_;
267: my $dsel = $sel-1;
268: my $usel = $sel+1;
269: $usel = 1 if $usel > $total;
270: $dsel = $total if $dsel < 1;
271: my $string;
272: $string = (<<END);
273: <table border='0' cellspacing='0' cellpadding='0'>
274: <tr><td><a href='javascript:move($sel,$dsel)'>
275: <img src="${iconpath}move_up.gif" alt='UP' border='0' /></a></td></tr>
276: <tr><td><a href='javascript:move($sel,$usel)'>
277: <img src="${iconpath}move_down.gif" alt='DOWN' border='0' /></a></td></tr>
278: </table>
279: END
280: return $string;
281: }
282:
283: # ------------------------------------------ Select box (returns scalar string)
284: sub select_box {
285: my ($total,$sel) = @_;
286: my $string;
287: $string = '<select name="alt'.$sel.'"';
288: $string .= " onChange='selectchange($sel)'>";
289: $string .= "<option name='o0' value='0'>remove</option>";
290: for my $cur (1..$total) {
291: $string .= "<option name='o$cur' value='$cur'";
292: if ($cur == $sel) {
293: $string .= "selected";
294: }
295: $string .= ">$cur</option>";
296: }
297: $string .= "</select>\n";
298: return $string;
299: }
300:
301: 1;
302:
303: __END__
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