Annotation of loncom/interface/lonrss.pm, revision 1.12
1.1 www 1: # The LearningOnline Network
2: # RSS Feeder
3: #
1.12 ! albertel 4: # $Id: lonrss.pm,v 1.11 2006/03/16 20:03:11 albertel Exp $
1.1 www 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;
1.5 www 41: $filename=~s/(\_rss\.html|\.rss)$//;
1.1 www 42: $filename=~s/\W//g;
43: return $filename;
44: }
45:
46: sub feedname {
47: return 'nohist_'.&filterfeedname(shift).'_rssfeed';
48: }
49:
50: sub displayfeedname {
1.2 www 51: my ($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 {
1.6 www 77: my ($uname,$udom,$edit)=@_;
1.2 www 78: my $feeds='';
79: my %feednames=&Apache::lonnet::dump('nohist_all_rss_feeds',$udom,$uname);
1.6 www 80: my $mode='public';
81: if ($edit) {
82: $mode='adm';
83: }
1.3 albertel 84: foreach my $feed (sort(keys(%feednames))) {
85: if ($feed!~/^error\:/) {
1.5 www 86: my $feedurl='feed://'.$ENV{'HTTP_HOST'}.'/public/'.$udom.'/'.$uname.'/'.$feed.'.rss';
1.6 www 87: my $htmlurl='http://'.$ENV{'HTTP_HOST'}.'/'.$mode.'/'.$udom.'/'.$uname.'/'.$feed.'_rss.html';
1.5 www 88: $feeds.='<li>'.$feednames{$feed}.
1.6 www 89: '<br />'.($edit?&mt('Edit'):'HTML').': <a href="'.$htmlurl.'"><tt>'.$htmlurl.'</tt></a>'.
90: ($edit?'':'<br />RSS: <a href="'.$feedurl.'"><tt>'.$feedurl.'</tt></a>').'</li>';
1.2 www 91: }
92: }
93: if ($feeds) {
94: return '<h4>'.&mt('Available RSS Feeds and Blogs').'</h4><ul>'.$feeds.'</ul>';
95: } else {
96: return '';
97: }
1.1 www 98: }
99:
1.12 ! albertel 100: sub rss_link {
! 101: my ($url) = @_;
! 102: return qq|<link rel="alternate" type="application/rss+xml" title="Course Announcements" href="$url" />|;
! 103:
! 104: }
! 105:
1.3 albertel 106: {
107: my $feedcounter;
108: sub addentry {
109: $feedcounter++;
110: my $id=time.'00000'.$$.'00000'.$feedcounter;
111: return &editentry($id,@_);
112: }
1.2 www 113: }
114:
115: sub editentry {
116: my ($id,$uname,$udom,$filename,$title,$description,$url,$status,$encurl,$enclength,$enctype)=@_;
117: my $feedname=&feedname($filename);
118: &Apache::lonnet::put('nohist_all_rss_feeds',
119: { &filterfeedname($filename) => &displayfeedname($filename,$uname,$udom) },
120: $udom,$uname);
1.1 www 121: return &Apache::lonnet::put($feedname,{
122: $id.'_title' => $title,
123: $id.'_description' => $description,
124: $id.'_link' => $url,
125: $id.'_enclosureurl' => $encurl,
126: $id.'_enclosurelength' => $enclength,
127: $id.'_enclosuretype' => $enctype,
128: $id.'_status' => $status},$udom,$uname);
129: }
130:
1.2 www 131: sub changestatus {
132: my ($id,$uname,$udom,$filename,$status)=@_;
133: my $feedname=&feedname($filename);
134: if ($status eq 'deleted') {
135: return &Apache::lonnet::del($feedname,[$id.'_title',
136: $id.'_description',
137: $id.'_link',
138: $id.'_enclosureurl',
139: $id.'_enclosurelength',
140: $id.'_enclosuretype',
141: $id.'_status'],$udom,$uname);
142: } else {
143: return &Apache::lonnet::put($feedname,{$id.'_status' => $status},$udom,$uname);
144: }
145: }
146:
1.8 albertel 147: sub changed_js {
148: return <<ENDSCRIPT;
149: <script type="text/javascript">
150: function changed(tform,id) {
151: tform.elements[id+"_modified"].checked=true;
152: }
153: </script>
1.11 albertel 154: ENDSCRIPT
1.8 albertel 155: }
156:
1.1 www 157: sub handler {
1.8 albertel 158: my ($r) = @_;
1.5 www 159:
160: my $edit=0;
161: my $html=0;
162: my (undef,$mode,$udom,$uname,$filename)=split(/\//,$r->uri);
163: if (($mode eq 'adm') && ($env{'user.name'} eq $uname) && ($env{'user.domain'} eq $udom)) {
164: $edit=1;
165: $html=1;
166: }
167: if ($filename=~/\.html$/) {
168: $html=1;
169: }
170: if ($html) {
171: &Apache::loncommon::content_type($r,'text/html');
172: } else {
173: # Workaround Mozilla/Firefox
174: # &Apache::loncommon::content_type($r,'application/rss+xml');
175: &Apache::loncommon::content_type($r,'text/xml');
176: }
1.1 www 177: $r->send_http_header;
178: return OK if $r->header_only;
179:
180: my $filterfeedname=&filterfeedname($filename);
181: my $feedname=&feedname($filename);
1.2 www 182: my $displayfeedname=&displayfeedname($filename,$uname,$udom);
1.5 www 183: if ($html) {
1.8 albertel 184: $r->print(&Apache::lonxml::xmlbegin().
185: &Apache::loncommon::head($displayfeedname).
186: &Apache::loncommon::bodytag($displayfeedname,'','','',$udom,
187: $env{'form.register'}).
188: &changed_js());
189:
1.5 www 190: } else {
191: $r->print("<rss version='2.0' xmlns:dc='http://purl.org/dc/elements/1.1'>\n<channel>".
192: "\n<link>http://".$ENV{'HTTP_HOST'}.'/public/'.$udom.'/'.$uname.'/'.
193: $filterfeedname.'_rss.html</link>'.
194: "\n<description>".
195: &mt('An RSS Feed provided by the LON-CAPA Learning Content Management System').
196: '</description>');
197: }
1.1 www 198: # Is this user for real?
1.6 www 199: my $homeserver=&Apache::lonnet::homeserver($uname,$udom);
200: if ($html) {
201: $r->print(&advertisefeeds($uname,$udom,$edit));
202: }
1.1 www 203: if ($homeserver eq 'no_host') {
1.5 www 204: $r->print(($html?'<h3>':'<title>').&mt('No feed available').($html?'</h3>':'</title>'));
1.1 www 205: } else {
206: # Course or user?
207: my $name='';
208: if ($uname=~/^\d/) {
209: my %cenv=&Apache::lonnet::dump('environment',$udom,$uname);
210: $name=$cenv{'description'};
211: } else {
212: $name=&Apache::loncommon::nickname($uname,$udom);
213: }
1.5 www 214: $r->print("\n".
215: ($html?'<h3>':'<title>').
216: &mt('LON-CAPA Feed "[_1]" for [_2]',$displayfeedname,$name).
1.6 www 217: ($html?'</h3>'.($edit?'<form method="post"><br />'.
218: &mt('Name of blog/journal').
219: ': <input type="text" size="50" name="newblogname" value="'.
220: $displayfeedname.'" />':'').'<ul>':'</title>'));
1.1 www 221: # Render private items?
222: my $viewpubliconly=1;
223: if (($env{'user.name'} eq $uname) && ($env{'user.domain'} eq $udom)) {
224: $viewpubliconly=0;
225: }
226: # Get feed items
227: my %newsfeed=&Apache::lonnet::dump($feedname,$udom,$uname);
1.4 albertel 228: foreach my $entry (sort(keys(%newsfeed))) {
1.3 albertel 229: if ($entry=~/^(\d+)\_status$/) {
1.1 www 230: my $id=$1;
1.5 www 231: if ($edit) {
232: my %lt=&Apache::lonlocal::texthash('public' => 'public',
233: 'private' => 'private',
234: 'hidden' => 'hidden',
1.6 www 235: 'delete' => 'delete',
236: 'store' => 'Store changes');
1.5 www 237: my %status=();
238: $status{$newsfeed{$id.'_status'}}='checked="checked"';
239: $r->print(<<ENDEDIT);
240: <li>
1.6 www 241: <label><input name='$id\_modified' type='checkbox' /> $lt{'store'}</label>
242:
243: <label><input name='$id\_status' type="radio" value="public" $status{'public'} onClick="changed(this.form,'$id');" /> $lt{'public'}</label>
1.5 www 244:
1.6 www 245: <label><input name='$id\_status' type="radio" value="private" $status{'private'} onClick="changed(this.form,'$id');" /> $lt{'private'}</label>
1.5 www 246:
1.6 www 247: <label><input name='$id\_status' type="radio" value="hidden" $status{'hidden'} onClick="changed(this.form,'$id');" /> $lt{'hidden'}</label>
1.5 www 248:
1.6 www 249: <label><input name='$id\_status' type="radio" value="delete" onClick="changed(this.form,'$id');" /> $lt{'delete'}</label>
1.5 www 250: <br />
1.6 www 251: <input name='$id\_title' type='text' size='80' value='$newsfeed{$id.'_title'}' onChange="changed(this.form,'$id');" /><br />
252: <textarea name='$id\_description' rows="6" cols="80" onChange="changed(this.form,'$id');">$newsfeed{$id.'_description'}</textarea><br />
253: <input name='$id\_link' type='text' size='80' value='$newsfeed{$id.'_link'}' onChange="changed(this.form,'$id');" />
254: <hr /></li>
1.5 www 255: ENDEDIT
256: } else {
257: if (($newsfeed{$id.'_status'} ne 'public') && ($viewpubliconly)) { next; }
258: if ($newsfeed{$id.'_status'} eq 'hidden') { next; }
259: $r->print("\n".($html?"\n<li><b>":"<item>\n<title>").$newsfeed{$id.'_title'}.
260: ($html?"</b><br />\n":"</title>\n<description>").
261: $newsfeed{$id.'_description'}.
262: ($html?"<br />\n<a href='":"</description>\n<link>").
263: "http://".$ENV{'HTTP_HOST'}.
264: $newsfeed{$id.'_link'}.
265: ($html?("'>".&mt('Read more')."</a><br />\n"):"</link>\n"));
266: if ($newsfeed{$id.'_enclosureurl'}) {
267: $r->print(($html?"<a href='":"\n<enclosure url='").
268: $newsfeed{$id.'_enclosureurl'}."' length='".$newsfeed{$id.'_enclosurelength'}.
269: "' type='".$newsfeed{$id.'_enclosuretype'}.($html?"'>".&mt('Enclosure')."</a>":"' />"));
270: }
271: if ($html) {
272: $r->print("\n<hr /></li>\n");
273: } else {
274: $r->print("\n<guid isPermaLink='false'>".$id.$filterfeedname.'_'.$udom.'_'.$uname."</guid></item>\n");
275: }
1.1 www 276: }
277: }
278: }
279: }
1.8 albertel 280: $r->print("\n".($html?'</ul>'.($edit?'<input type="submit" value="'.&mt('Store Marked Changes').'" /></form>':'').&Apache::loncommon::end_page():'</channel></rss>'."\n"));
1.1 www 281: return OK;
282: }
283: 1;
284: __END__
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