1: # The LearningOnline Network
2: # RSS Feeder
3: #
4: # $Id: lonrss.pm,v 1.7 2005/11/22 16:16:53 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 handler {
143: my $r = shift;
144:
145: my $edit=0;
146: my $html=0;
147: my (undef,$mode,$udom,$uname,$filename)=split(/\//,$r->uri);
148: if (($mode eq 'adm') && ($env{'user.name'} eq $uname) && ($env{'user.domain'} eq $udom)) {
149: $edit=1;
150: $html=1;
151: }
152: if ($filename=~/\.html$/) {
153: $html=1;
154: }
155: if ($html) {
156: &Apache::loncommon::content_type($r,'text/html');
157: } else {
158: # Workaround Mozilla/Firefox
159: # &Apache::loncommon::content_type($r,'application/rss+xml');
160: &Apache::loncommon::content_type($r,'text/xml');
161: }
162: $r->send_http_header;
163: return OK if $r->header_only;
164:
165: my $filterfeedname=&filterfeedname($filename);
166: my $feedname=&feedname($filename);
167: my $displayfeedname=&displayfeedname($filename,$uname,$udom);
168: if ($html) {
169: $r->print(&Apache::lonxml::xmlbegin().&Apache::loncommon::bodytag
170: ($displayfeedname,'','','',$udom,
171: $env{'form.register'}).<<ENDSCRIPT);
172: <script>
173: function changed(tform,id) {
174: tform.elements[id+"_modified"].checked=true;
175: }
176: </script>
177: ENDSCRIPT
178: } else {
179: $r->print("<rss version='2.0' xmlns:dc='http://purl.org/dc/elements/1.1'>\n<channel>".
180: "\n<link>http://".$ENV{'HTTP_HOST'}.'/public/'.$udom.'/'.$uname.'/'.
181: $filterfeedname.'_rss.html</link>'.
182: "\n<description>".
183: &mt('An RSS Feed provided by the LON-CAPA Learning Content Management System').
184: '</description>');
185: }
186: # Is this user for real?
187: my $homeserver=&Apache::lonnet::homeserver($uname,$udom);
188: if ($html) {
189: $r->print(&advertisefeeds($uname,$udom,$edit));
190: }
191: if ($homeserver eq 'no_host') {
192: $r->print(($html?'<h3>':'<title>').&mt('No feed available').($html?'</h3>':'</title>'));
193: } else {
194: # Course or user?
195: my $name='';
196: if ($uname=~/^\d/) {
197: my %cenv=&Apache::lonnet::dump('environment',$udom,$uname);
198: $name=$cenv{'description'};
199: } else {
200: $name=&Apache::loncommon::nickname($uname,$udom);
201: }
202: $r->print("\n".
203: ($html?'<h3>':'<title>').
204: &mt('LON-CAPA Feed "[_1]" for [_2]',$displayfeedname,$name).
205: ($html?'</h3>'.($edit?'<form method="post"><br />'.
206: &mt('Name of blog/journal').
207: ': <input type="text" size="50" name="newblogname" value="'.
208: $displayfeedname.'" />':'').'<ul>':'</title>'));
209: # Render private items?
210: my $viewpubliconly=1;
211: if (($env{'user.name'} eq $uname) && ($env{'user.domain'} eq $udom)) {
212: $viewpubliconly=0;
213: }
214: # Get feed items
215: my %newsfeed=&Apache::lonnet::dump($feedname,$udom,$uname);
216: foreach my $entry (sort(keys(%newsfeed))) {
217: if ($entry=~/^(\d+)\_status$/) {
218: my $id=$1;
219: if ($edit) {
220: my %lt=&Apache::lonlocal::texthash('public' => 'public',
221: 'private' => 'private',
222: 'hidden' => 'hidden',
223: 'delete' => 'delete',
224: 'store' => 'Store changes');
225: my %status=();
226: $status{$newsfeed{$id.'_status'}}='checked="checked"';
227: $r->print(<<ENDEDIT);
228: <li>
229: <label><input name='$id\_modified' type='checkbox' /> $lt{'store'}</label>
230:
231: <label><input name='$id\_status' type="radio" value="public" $status{'public'} onClick="changed(this.form,'$id');" /> $lt{'public'}</label>
232:
233: <label><input name='$id\_status' type="radio" value="private" $status{'private'} onClick="changed(this.form,'$id');" /> $lt{'private'}</label>
234:
235: <label><input name='$id\_status' type="radio" value="hidden" $status{'hidden'} onClick="changed(this.form,'$id');" /> $lt{'hidden'}</label>
236:
237: <label><input name='$id\_status' type="radio" value="delete" onClick="changed(this.form,'$id');" /> $lt{'delete'}</label>
238: <br />
239: <input name='$id\_title' type='text' size='80' value='$newsfeed{$id.'_title'}' onChange="changed(this.form,'$id');" /><br />
240: <textarea name='$id\_description' rows="6" cols="80" onChange="changed(this.form,'$id');">$newsfeed{$id.'_description'}</textarea><br />
241: <input name='$id\_link' type='text' size='80' value='$newsfeed{$id.'_link'}' onChange="changed(this.form,'$id');" />
242: <hr /></li>
243: ENDEDIT
244: } else {
245: if (($newsfeed{$id.'_status'} ne 'public') && ($viewpubliconly)) { next; }
246: if ($newsfeed{$id.'_status'} eq 'hidden') { next; }
247: $r->print("\n".($html?"\n<li><b>":"<item>\n<title>").$newsfeed{$id.'_title'}.
248: ($html?"</b><br />\n":"</title>\n<description>").
249: $newsfeed{$id.'_description'}.
250: ($html?"<br />\n<a href='":"</description>\n<link>").
251: "http://".$ENV{'HTTP_HOST'}.
252: $newsfeed{$id.'_link'}.
253: ($html?("'>".&mt('Read more')."</a><br />\n"):"</link>\n"));
254: if ($newsfeed{$id.'_enclosureurl'}) {
255: $r->print(($html?"<a href='":"\n<enclosure url='").
256: $newsfeed{$id.'_enclosureurl'}."' length='".$newsfeed{$id.'_enclosurelength'}.
257: "' type='".$newsfeed{$id.'_enclosuretype'}.($html?"'>".&mt('Enclosure')."</a>":"' />"));
258: }
259: if ($html) {
260: $r->print("\n<hr /></li>\n");
261: } else {
262: $r->print("\n<guid isPermaLink='false'>".$id.$filterfeedname.'_'.$udom.'_'.$uname."</guid></item>\n");
263: }
264: }
265: }
266: }
267: }
268: $r->print("\n".($html?'</ul>'.($edit?'<input type="submit" value="'.&mt('Store Marked Changes').'" /></form>':'').'</body></html>':'</channel></rss>'."\n"));
269: return OK;
270: }
271: 1;
272: __END__
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