1: # The LearningOnline Network
2: # RSS Feeder
3: #
4: # $Id: lonrss.pm,v 1.6 2005/11/20 19:37:44 www 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: my ($uname,$udom,$edit)=@_;
78: my $feeds='';
79: my %feednames=&Apache::lonnet::dump('nohist_all_rss_feeds',$udom,$uname);
80: my $mode='public';
81: if ($edit) {
82: $mode='adm';
83: }
84: foreach my $feed (sort(keys(%feednames))) {
85: if ($feed!~/^error\:/) {
86: my $feedurl='feed://'.$ENV{'HTTP_HOST'}.'/public/'.$udom.'/'.$uname.'/'.$feed.'.rss';
87: my $htmlurl='http://'.$ENV{'HTTP_HOST'}.'/'.$mode.'/'.$udom.'/'.$uname.'/'.$feed.'_rss.html';
88: $feeds.='<li>'.$feednames{$feed}.
89: '<br />'.($edit?&mt('Edit'):'HTML').': <a href="'.$htmlurl.'"><tt>'.$htmlurl.'</tt></a>'.
90: ($edit?'':'<br />RSS: <a href="'.$feedurl.'"><tt>'.$feedurl.'</tt></a>').'</li>';
91: }
92: }
93: if ($feeds) {
94: return '<h4>'.&mt('Available RSS Feeds and Blogs').'</h4><ul>'.$feeds.'</ul>';
95: } else {
96: return '';
97: }
98: }
99:
100: {
101: my $feedcounter;
102: sub addentry {
103: $feedcounter++;
104: my $id=time.'00000'.$$.'00000'.$feedcounter;
105: return &editentry($id,@_);
106: }
107: }
108:
109: sub editentry {
110: my ($id,$uname,$udom,$filename,$title,$description,$url,$status,$encurl,$enclength,$enctype)=@_;
111: my $feedname=&feedname($filename);
112: &Apache::lonnet::put('nohist_all_rss_feeds',
113: { &filterfeedname($filename) => &displayfeedname($filename,$uname,$udom) },
114: $udom,$uname);
115: return &Apache::lonnet::put($feedname,{
116: $id.'_title' => $title,
117: $id.'_description' => $description,
118: $id.'_link' => $url,
119: $id.'_enclosureurl' => $encurl,
120: $id.'_enclosurelength' => $enclength,
121: $id.'_enclosuretype' => $enctype,
122: $id.'_status' => $status},$udom,$uname);
123: }
124:
125: sub changestatus {
126: my ($id,$uname,$udom,$filename,$status)=@_;
127: my $feedname=&feedname($filename);
128: if ($status eq 'deleted') {
129: return &Apache::lonnet::del($feedname,[$id.'_title',
130: $id.'_description',
131: $id.'_link',
132: $id.'_enclosureurl',
133: $id.'_enclosurelength',
134: $id.'_enclosuretype',
135: $id.'_status'],$udom,$uname);
136: } else {
137: return &Apache::lonnet::put($feedname,{$id.'_status' => $status},$udom,$uname);
138: }
139: }
140:
141: sub handler {
142: my $r = shift;
143:
144: my $edit=0;
145: my $html=0;
146: my (undef,$mode,$udom,$uname,$filename)=split(/\//,$r->uri);
147: if (($mode eq 'adm') && ($env{'user.name'} eq $uname) && ($env{'user.domain'} eq $udom)) {
148: $edit=1;
149: $html=1;
150: }
151: if ($filename=~/\.html$/) {
152: $html=1;
153: }
154: if ($html) {
155: &Apache::loncommon::content_type($r,'text/html');
156: } else {
157: # Workaround Mozilla/Firefox
158: # &Apache::loncommon::content_type($r,'application/rss+xml');
159: &Apache::loncommon::content_type($r,'text/xml');
160: }
161: $r->send_http_header;
162: return OK if $r->header_only;
163:
164: my $filterfeedname=&filterfeedname($filename);
165: my $feedname=&feedname($filename);
166: my $displayfeedname=&displayfeedname($filename,$uname,$udom);
167: if ($html) {
168: $r->print(&Apache::lonxml::xmlbegin().&Apache::loncommon::bodytag
169: ($displayfeedname,'','','',$udom,
170: $env{'form.register'}).<<ENDSCRIPT);
171: <script>
172: function changed(tform,id) {
173: tform.elements[id+"_modified"].checked=true;
174: }
175: </script>
176: ENDSCRIPT
177: } else {
178: $r->print("<rss version='2.0' xmlns:dc='http://purl.org/dc/elements/1.1'>\n<channel>".
179: "\n<link>http://".$ENV{'HTTP_HOST'}.'/public/'.$udom.'/'.$uname.'/'.
180: $filterfeedname.'_rss.html</link>'.
181: "\n<description>".
182: &mt('An RSS Feed provided by the LON-CAPA Learning Content Management System').
183: '</description>');
184: }
185: # Is this user for real?
186: my $homeserver=&Apache::lonnet::homeserver($uname,$udom);
187: if ($html) {
188: $r->print(&advertisefeeds($uname,$udom,$edit));
189: }
190: if ($homeserver eq 'no_host') {
191: $r->print(($html?'<h3>':'<title>').&mt('No feed available').($html?'</h3>':'</title>'));
192: } else {
193: # Course or user?
194: my $name='';
195: if ($uname=~/^\d/) {
196: my %cenv=&Apache::lonnet::dump('environment',$udom,$uname);
197: $name=$cenv{'description'};
198: } else {
199: $name=&Apache::loncommon::nickname($uname,$udom);
200: }
201: $r->print("\n".
202: ($html?'<h3>':'<title>').
203: &mt('LON-CAPA Feed "[_1]" for [_2]',$displayfeedname,$name).
204: ($html?'</h3>'.($edit?'<form method="post"><br />'.
205: &mt('Name of blog/journal').
206: ': <input type="text" size="50" name="newblogname" value="'.
207: $displayfeedname.'" />':'').'<ul>':'</title>'));
208: # Render private items?
209: my $viewpubliconly=1;
210: if (($env{'user.name'} eq $uname) && ($env{'user.domain'} eq $udom)) {
211: $viewpubliconly=0;
212: }
213: # Get feed items
214: my %newsfeed=&Apache::lonnet::dump($feedname,$udom,$uname);
215: foreach my $entry (sort(keys(%newsfeed))) {
216: if ($entry=~/^(\d+)\_status$/) {
217: my $id=$1;
218: if ($edit) {
219: my %lt=&Apache::lonlocal::texthash('public' => 'public',
220: 'private' => 'private',
221: 'hidden' => 'hidden',
222: 'delete' => 'delete',
223: 'store' => 'Store changes');
224: my %status=();
225: $status{$newsfeed{$id.'_status'}}='checked="checked"';
226: $r->print(<<ENDEDIT);
227: <li>
228: <label><input name='$id\_modified' type='checkbox' /> $lt{'store'}</label>
229:
230: <label><input name='$id\_status' type="radio" value="public" $status{'public'} onClick="changed(this.form,'$id');" /> $lt{'public'}</label>
231:
232: <label><input name='$id\_status' type="radio" value="private" $status{'private'} onClick="changed(this.form,'$id');" /> $lt{'private'}</label>
233:
234: <label><input name='$id\_status' type="radio" value="hidden" $status{'hidden'} onClick="changed(this.form,'$id');" /> $lt{'hidden'}</label>
235:
236: <label><input name='$id\_status' type="radio" value="delete" onClick="changed(this.form,'$id');" /> $lt{'delete'}</label>
237: <br />
238: <input name='$id\_title' type='text' size='80' value='$newsfeed{$id.'_title'}' onChange="changed(this.form,'$id');" /><br />
239: <textarea name='$id\_description' rows="6" cols="80" onChange="changed(this.form,'$id');">$newsfeed{$id.'_description'}</textarea><br />
240: <input name='$id\_link' type='text' size='80' value='$newsfeed{$id.'_link'}' onChange="changed(this.form,'$id');" />
241: <hr /></li>
242: ENDEDIT
243: } else {
244: if (($newsfeed{$id.'_status'} ne 'public') && ($viewpubliconly)) { next; }
245: if ($newsfeed{$id.'_status'} eq 'hidden') { next; }
246: $r->print("\n".($html?"\n<li><b>":"<item>\n<title>").$newsfeed{$id.'_title'}.
247: ($html?"</b><br />\n":"</title>\n<description>").
248: $newsfeed{$id.'_description'}.
249: ($html?"<br />\n<a href='":"</description>\n<link>").
250: "http://".$ENV{'HTTP_HOST'}.
251: $newsfeed{$id.'_link'}.
252: ($html?("'>".&mt('Read more')."</a><br />\n"):"</link>\n"));
253: if ($newsfeed{$id.'_enclosureurl'}) {
254: $r->print(($html?"<a href='":"\n<enclosure url='").
255: $newsfeed{$id.'_enclosureurl'}."' length='".$newsfeed{$id.'_enclosurelength'}.
256: "' type='".$newsfeed{$id.'_enclosuretype'}.($html?"'>".&mt('Enclosure')."</a>":"' />"));
257: }
258: if ($html) {
259: $r->print("\n<hr /></li>\n");
260: } else {
261: $r->print("\n<guid isPermaLink='false'>".$id.$filterfeedname.'_'.$udom.'_'.$uname."</guid></item>\n");
262: }
263: }
264: }
265: }
266: }
267: $r->print("\n".($html?'</ul>'.($edit?'<input type="submit" value="'.&mt('Store Marked Changes').'" /></form>':'').'</body></html>':'</channel></rss>'."\n"));
268: return OK;
269: }
270: 1;
271: __END__
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