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 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=1+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 $diropendb = "/home/httpd/perl/tmp/$domain\_$ENV{'user.name'}_indexer.db";
91:
92: my %shash; # sort order (key is resource location, value is sort order)
93: my %thash; # title (key is resource location, value is title)
94: map {
95: my ($name, $value) = split(/=/,$_);
96: $value =~ tr/+/ /;
97: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
98: if ($name eq 'acts') {
99: $ENV{'form.'.$name}=$value;
100: }
101: } (split(/&/,$ENV{'QUERY_STRING'}));
102: if (tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) {
103: my $acts = $ENV{'form.acts'};
104: my @Acts = split(/b/,$acts);
105: my %ahash;
106: my %achash;
107: my $ac = 0;
108: map {
109: my ($state,$ref) = split(/a/);
110: $ahash{$ref} = $state;
111: $achash{$ref} = $ac;
112: $ac++;
113: } (@Acts);
114: map {
115: my $key = $_;
116: if ($ahash{$key} eq '1') {
117: $hash{'store_'.$hash{'pre_'.$key.'_link'}} =
118: $hash{'pre_'.$key.'_title'};
119: $hash{'storectr_'.$hash{'pre_'.$key.'_link'}} =
120: $hash{'storectr'}+0;
121: $hash{'storectr'}++;
122: }
123: if ($ahash{$key} eq '0') {
124: if ($hash{'store_'.$hash{'pre_'.$key.'_link'}}) {
125: delete $hash{'store_'.$hash{'pre_'.$key.'_link'}};
126: }
127: }
128: } sort {$achash{$a} <=> $achash{$b}} (keys %ahash);
129: map {
130: if ($_ =~ /^store_/) {
131: my $key = $_;
132: $key =~ s/^store_//;
133: $shash{$key} = $hash{'storectr_'.$key};
134: $thash{$key} = $hash{'store_'.$key};
135: }
136: } keys %hash;
137: if ($ENV{'form.oldval'}) {
138: my $newctr = 0;
139: my %chash;
140: map {
141: my $key = $_;
142: $newctr++;
143: $shash{$key} = $newctr;
144: $hash{'storectr_'.$key} = $newctr;
145: $chash{$newctr} = $key;
146: } sort {$shash{$a} <=> $shash{$b}} (keys %shash);
147: my $oldval = $ENV{'form.oldval'};
148: my $newval = $ENV{'form.newval'};
149: if ($oldval != $newval) {
150: $shash{$chash{$oldval}} = $newval;
151: $hash{'storectr_'.$chash{$oldval}} = $newval;
152: if ($oldval < $newval) { # push down
153: for my $idx ($oldval..($newval-1)) {
154: $shash{$chash{$idx+1}} = $idx;
155: $hash{'storectr_'.$chash{$idx+1}} = $idx;
156: }
157: }
158: elsif ($oldval > $newval) { # push up
159: for my $idx (reverse($newval..($oldval-1))) {
160: $shash{$chash{$idx}} = $idx+1;
161: $hash{'storectr_'.$chash{$idx}} = $idx+1;
162: }
163: }
164: }
165: }
166: } else {
167: $r->print('Unable to tie hash to db file</body></html>');
168: return OK;
169: }
170: untie %hash;
171: my $ctr = 0;
172: my $clen = scalar(keys %shash);
173: $r->print('<h2><font color="#888888">The LearningOnline With CAPA '.
174: 'Group Sorter</font></h2>'."\n");
175: $r->print('<b><font color="#888888">Finalize order of resources</font>'.
176: '</b>'."\n");
177: $r->print("<form method='post' action='/adm/groupsort' name='groupsort' ".
178: "enctype='application/x-www-form-urlencoded'>");
179: $r->print(<<END);
180: <input type="hidden" name="fnum" value="$clen" />
181: <input type="hidden" name="oldval" value="" />
182: <input type="hidden" name="newval" value="" />
183: <input type="button" name="alter" value="GO BACK"
184: onClick="window.location='/res/?catalogmode=groupimport'" />
185: <input type="button" name="alter" value="FINISH IMPORT"
186: onClick="finish_import()" />
187: <input type="button" name="alter" value="CANCEL" onClick="self.close()" />
188: END
189: $r->print("<table border='0'><tr><td bgcolor='#eeeeee'>");
190: $r->print("<table border=0><tr>\n");
191: $r->print("<td colspan='2' bgcolor='$titleclr'><b>Change order</b></td>".
192: "\n");
193: $r->print("<td colspan='2' bgcolor='$titleclr'><b>Title</b></td>\n");
194: $r->print("<td bgcolor='$titleclr'><b>Path</b></td></tr>\n");
195: map {
196: my $key=$_;
197: $ctr++;
198: my @file_ext = split(/\./,$key);
199: my $curfext = $file_ext[scalar(@file_ext)-1];
200: $r->print("<tr><td bgcolor='$fileclr'>");
201: $r->print(&movers($clen,$ctr));
202: $r->print(&hidden($ctr-1,$thash{$key},$key));
203: $r->print("</td><td bgcolor='$fileclr'>");
204: $r->print(&select_box($clen,$ctr));
205: $r->print("</td><td bgcolor='$fileclr'>");
206: $r->print("<img src='$iconpath$curfext.gif'>");
207: $r->print("</td><td bgcolor='$fileclr'>");
208: $r->print("$thash{$key}</td><td bgcolor='$fileclr'>\n");
209: $r->print("$key</td></tr>\n");
210: } sort {$shash{$a}<=>$shash{$b}} (keys %shash);
211: $r->print("</table></td></tr></table></form>");
212: $r->print(<<END);
213: </body>
214: </html>
215: END
216: return OK;
217: }
218:
219: # --------------------------------------- Hidden values (returns scalar string)
220: sub hidden {
221: my ($sel,$title,$filelink) = @_;
222: my $string = '<input type="hidden" name="title'.$sel.'" value="'.$title.
223: '" />';
224: $string .= '<input type="hidden" name="filelink'.$sel.'" value="'.
225: $filelink.'" />';
226: return $string;
227: }
228:
229: # --------------------------------------- Moving arrows (returns scalar string)
230: sub movers {
231: my ($total,$sel) = @_;
232: my $dsel = $sel-1;
233: my $usel = $sel+1;
234: $usel = 1 if $usel > $total;
235: $dsel = $total if $dsel < 1;
236: my $string;
237: $string = (<<END);
238: <table border='0' cellspacing='0' cellpadding='0'>
239: <tr><td><a href='javascript:move($sel,$dsel)'>
240: <img src="${iconpath}move_up.gif" alt='UP' border='0' /></a></td></tr>
241: <tr><td><a href='javascript:move($sel,$usel)'>
242: <img src="${iconpath}move_down.gif" alt='DOWN' border='0' /></a></td></tr>
243: </table>
244: END
245: return $string;
246: }
247:
248: # ------------------------------------------ Select box (returns scalar string)
249: sub select_box {
250: my ($total,$sel) = @_;
251: my $string;
252: $string = '<select name="alt'.$sel.'"';
253: $string .= " onChange='selectchange($sel)'>";
254: for my $cur (1..$total) {
255: $string .= "<option name='o$cur' value='$cur'";
256: if ($cur == $sel) {
257: $string .= "selected";
258: }
259: $string .= ">$cur</option>";
260: }
261: $string .= "</select>\n";
262: return $string;
263: }
264:
265: 1;
266:
267: __END__
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