1: # The LearningOnline Network
2: # RSS Feeder
3: #
4: # $Id: lonrss.pm,v 1.8 2006/03/15 21:43:20 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28:
29: package Apache::lonrss;
30:
31: use strict;
32: use Apache::Constants qw(:common);
33: use Apache::loncommon;
34: use Apache::lonnet;
35: use Apache::lontexconvert;
36: use Apache::lonlocal;
37: use Apache::lonhtmlcommon;
38:
39: sub filterfeedname {
40: my $filename=shift;
41: $filename=~s/(\_rss\.html|\.rss)$//;
42: $filename=~s/\W//g;
43: return $filename;
44: }
45:
46: sub feedname {
47: return 'nohist_'.&filterfeedname(shift).'_rssfeed';
48: }
49:
50: sub displayfeedname {
51: my ($rawname,$uname,$udom)=@_;
52: my $filterfilename=&filterfeedname($rawname);
53: # do we have a stored name?
54: my %stored=&Apache::lonnet::get('nohist_all_rss_feeds',[$filterfilename],$udom,$uname);
55: if ($stored{$filterfilename}) { return $stored{$filterfilename}; }
56: # no, construct a name
57: my $name=$filterfilename;
58: if ($name=~/^CourseBlog/) {
59: $name=&mt('Course Blog');
60: if ($env{'course.'.$env{'request.course.id'}.'.description'}) {
61: $name.=' '.$env{'course.'.$env{'request.course.id'}.'.description'};
62: }
63: } else {
64: $name=~s/\_/ /g;
65: }
66: return $name;
67: }
68:
69: sub renamefeed {
70: my ($rawname,$uname,$udom,$newname)=@_;
71: return &Apache::lonnet::put('nohist_all_rss_feeds',
72: { &filterfeedname($rawname) => $newname },
73: $udom,$uname);
74: }
75:
76: sub advertisefeeds {
77: return;
78: my ($uname,$udom,$edit)=@_;
79: my $feeds='';
80: my %feednames=&Apache::lonnet::dump('nohist_all_rss_feeds',$udom,$uname);
81: my $mode='public';
82: if ($edit) {
83: $mode='adm';
84: }
85: foreach my $feed (sort(keys(%feednames))) {
86: if ($feed!~/^error\:/) {
87: my $feedurl='feed://'.$ENV{'HTTP_HOST'}.'/public/'.$udom.'/'.$uname.'/'.$feed.'.rss';
88: my $htmlurl='http://'.$ENV{'HTTP_HOST'}.'/'.$mode.'/'.$udom.'/'.$uname.'/'.$feed.'_rss.html';
89: $feeds.='<li>'.$feednames{$feed}.
90: '<br />'.($edit?&mt('Edit'):'HTML').': <a href="'.$htmlurl.'"><tt>'.$htmlurl.'</tt></a>'.
91: ($edit?'':'<br />RSS: <a href="'.$feedurl.'"><tt>'.$feedurl.'</tt></a>').'</li>';
92: }
93: }
94: if ($feeds) {
95: return '<h4>'.&mt('Available RSS Feeds and Blogs').'</h4><ul>'.$feeds.'</ul>';
96: } else {
97: return '';
98: }
99: }
100:
101: {
102: my $feedcounter;
103: sub addentry {
104: $feedcounter++;
105: my $id=time.'00000'.$$.'00000'.$feedcounter;
106: return &editentry($id,@_);
107: }
108: }
109:
110: sub editentry {
111: my ($id,$uname,$udom,$filename,$title,$description,$url,$status,$encurl,$enclength,$enctype)=@_;
112: my $feedname=&feedname($filename);
113: &Apache::lonnet::put('nohist_all_rss_feeds',
114: { &filterfeedname($filename) => &displayfeedname($filename,$uname,$udom) },
115: $udom,$uname);
116: return &Apache::lonnet::put($feedname,{
117: $id.'_title' => $title,
118: $id.'_description' => $description,
119: $id.'_link' => $url,
120: $id.'_enclosureurl' => $encurl,
121: $id.'_enclosurelength' => $enclength,
122: $id.'_enclosuretype' => $enctype,
123: $id.'_status' => $status},$udom,$uname);
124: }
125:
126: sub changestatus {
127: my ($id,$uname,$udom,$filename,$status)=@_;
128: my $feedname=&feedname($filename);
129: if ($status eq 'deleted') {
130: return &Apache::lonnet::del($feedname,[$id.'_title',
131: $id.'_description',
132: $id.'_link',
133: $id.'_enclosureurl',
134: $id.'_enclosurelength',
135: $id.'_enclosuretype',
136: $id.'_status'],$udom,$uname);
137: } else {
138: return &Apache::lonnet::put($feedname,{$id.'_status' => $status},$udom,$uname);
139: }
140: }
141:
142: sub changed_js {
143:
144: return <<ENDSCRIPT;
145: <script type="text/javascript">
146: function changed(tform,id) {
147: tform.elements[id+"_modified"].checked=true;
148: }
149: </script>
150: ENDSCRIPT
151: }
152:
153: sub handler {
154: my ($r) = @_;
155:
156: my $edit=0;
157: my $html=0;
158: my (undef,$mode,$udom,$uname,$filename)=split(/\//,$r->uri);
159: if (($mode eq 'adm') && ($env{'user.name'} eq $uname) && ($env{'user.domain'} eq $udom)) {
160: $edit=1;
161: $html=1;
162: }
163: if ($filename=~/\.html$/) {
164: $html=1;
165: }
166: if ($html) {
167: &Apache::loncommon::content_type($r,'text/html');
168: } else {
169: # Workaround Mozilla/Firefox
170: # &Apache::loncommon::content_type($r,'application/rss+xml');
171: &Apache::loncommon::content_type($r,'text/xml');
172: }
173: $r->send_http_header;
174: return OK if $r->header_only;
175:
176: my $filterfeedname=&filterfeedname($filename);
177: my $feedname=&feedname($filename);
178: my $displayfeedname=&displayfeedname($filename,$uname,$udom);
179: if ($html) {
180: $r->print(&Apache::lonxml::xmlbegin().
181: &Apache::loncommon::head($displayfeedname).
182: &Apache::loncommon::bodytag($displayfeedname,'','','',$udom,
183: $env{'form.register'}).
184: &changed_js());
185:
186: } else {
187: $r->print("<rss version='2.0' xmlns:dc='http://purl.org/dc/elements/1.1'>\n<channel>".
188: "\n<link>http://".$ENV{'HTTP_HOST'}.'/public/'.$udom.'/'.$uname.'/'.
189: $filterfeedname.'_rss.html</link>'.
190: "\n<description>".
191: &mt('An RSS Feed provided by the LON-CAPA Learning Content Management System').
192: '</description>');
193: }
194: # Is this user for real?
195: my $homeserver=&Apache::lonnet::homeserver($uname,$udom);
196: if ($html) {
197: $r->print(&advertisefeeds($uname,$udom,$edit));
198: }
199: if ($homeserver eq 'no_host') {
200: $r->print(($html?'<h3>':'<title>').&mt('No feed available').($html?'</h3>':'</title>'));
201: } else {
202: # Course or user?
203: my $name='';
204: if ($uname=~/^\d/) {
205: my %cenv=&Apache::lonnet::dump('environment',$udom,$uname);
206: $name=$cenv{'description'};
207: } else {
208: $name=&Apache::loncommon::nickname($uname,$udom);
209: }
210: $r->print("\n".
211: ($html?'<h3>':'<title>').
212: &mt('LON-CAPA Feed "[_1]" for [_2]',$displayfeedname,$name).
213: ($html?'</h3>'.($edit?'<form method="post"><br />'.
214: &mt('Name of blog/journal').
215: ': <input type="text" size="50" name="newblogname" value="'.
216: $displayfeedname.'" />':'').'<ul>':'</title>'));
217: # Render private items?
218: my $viewpubliconly=1;
219: if (($env{'user.name'} eq $uname) && ($env{'user.domain'} eq $udom)) {
220: $viewpubliconly=0;
221: }
222: # Get feed items
223: my %newsfeed=&Apache::lonnet::dump($feedname,$udom,$uname);
224: foreach my $entry (sort(keys(%newsfeed))) {
225: if ($entry=~/^(\d+)\_status$/) {
226: my $id=$1;
227: if ($edit) {
228: my %lt=&Apache::lonlocal::texthash('public' => 'public',
229: 'private' => 'private',
230: 'hidden' => 'hidden',
231: 'delete' => 'delete',
232: 'store' => 'Store changes');
233: my %status=();
234: $status{$newsfeed{$id.'_status'}}='checked="checked"';
235: $r->print(<<ENDEDIT);
236: <li>
237: <label><input name='$id\_modified' type='checkbox' /> $lt{'store'}</label>
238:
239: <label><input name='$id\_status' type="radio" value="public" $status{'public'} onClick="changed(this.form,'$id');" /> $lt{'public'}</label>
240:
241: <label><input name='$id\_status' type="radio" value="private" $status{'private'} onClick="changed(this.form,'$id');" /> $lt{'private'}</label>
242:
243: <label><input name='$id\_status' type="radio" value="hidden" $status{'hidden'} onClick="changed(this.form,'$id');" /> $lt{'hidden'}</label>
244:
245: <label><input name='$id\_status' type="radio" value="delete" onClick="changed(this.form,'$id');" /> $lt{'delete'}</label>
246: <br />
247: <input name='$id\_title' type='text' size='80' value='$newsfeed{$id.'_title'}' onChange="changed(this.form,'$id');" /><br />
248: <textarea name='$id\_description' rows="6" cols="80" onChange="changed(this.form,'$id');">$newsfeed{$id.'_description'}</textarea><br />
249: <input name='$id\_link' type='text' size='80' value='$newsfeed{$id.'_link'}' onChange="changed(this.form,'$id');" />
250: <hr /></li>
251: ENDEDIT
252: } else {
253: if (($newsfeed{$id.'_status'} ne 'public') && ($viewpubliconly)) { next; }
254: if ($newsfeed{$id.'_status'} eq 'hidden') { next; }
255: $r->print("\n".($html?"\n<li><b>":"<item>\n<title>").$newsfeed{$id.'_title'}.
256: ($html?"</b><br />\n":"</title>\n<description>").
257: $newsfeed{$id.'_description'}.
258: ($html?"<br />\n<a href='":"</description>\n<link>").
259: "http://".$ENV{'HTTP_HOST'}.
260: $newsfeed{$id.'_link'}.
261: ($html?("'>".&mt('Read more')."</a><br />\n"):"</link>\n"));
262: if ($newsfeed{$id.'_enclosureurl'}) {
263: $r->print(($html?"<a href='":"\n<enclosure url='").
264: $newsfeed{$id.'_enclosureurl'}."' length='".$newsfeed{$id.'_enclosurelength'}.
265: "' type='".$newsfeed{$id.'_enclosuretype'}.($html?"'>".&mt('Enclosure')."</a>":"' />"));
266: }
267: if ($html) {
268: $r->print("\n<hr /></li>\n");
269: } else {
270: $r->print("\n<guid isPermaLink='false'>".$id.$filterfeedname.'_'.$udom.'_'.$uname."</guid></item>\n");
271: }
272: }
273: }
274: }
275: }
276: $r->print("\n".($html?'</ul>'.($edit?'<input type="submit" value="'.&mt('Store Marked Changes').'" /></form>':'').&Apache::loncommon::end_page():'</channel></rss>'."\n"));
277: return OK;
278: }
279: 1;
280: __END__
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