Annotation of loncom/interface/lonrss.pm, revision 1.5
1.1 www 1: # The LearningOnline Network
2: # RSS Feeder
3: #
1.5 ! www 4: # $Id: lonrss.pm,v 1.4 2005/11/18 19:32:05 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 {
77: my ($uname,$udom)=@_;
78: my $feeds='';
79: my %feednames=&Apache::lonnet::dump('nohist_all_rss_feeds',$udom,$uname);
1.3 albertel 80: foreach my $feed (sort(keys(%feednames))) {
81: if ($feed!~/^error\:/) {
1.5 ! www 82: my $feedurl='feed://'.$ENV{'HTTP_HOST'}.'/public/'.$udom.'/'.$uname.'/'.$feed.'.rss';
! 83: my $htmlurl='http://'.$ENV{'HTTP_HOST'}.'/public/'.$udom.'/'.$uname.'/'.$feed.'_rss.html';
! 84: $feeds.='<li>'.$feednames{$feed}.
! 85: '<br />HTML: <a href="'.$htmlurl.'"><tt>'.$htmlurl.'</tt></a>'.
! 86: '<br />RSS: <a href="'.$feedurl.'"><tt>'.$feedurl.'</tt></a></li>';
1.2 www 87: }
88: }
89: if ($feeds) {
90: return '<h4>'.&mt('Available RSS Feeds and Blogs').'</h4><ul>'.$feeds.'</ul>';
91: } else {
92: return '';
93: }
1.1 www 94: }
95:
1.3 albertel 96: {
97: my $feedcounter;
98: sub addentry {
99: $feedcounter++;
100: my $id=time.'00000'.$$.'00000'.$feedcounter;
101: return &editentry($id,@_);
102: }
1.2 www 103: }
104:
105: sub editentry {
106: my ($id,$uname,$udom,$filename,$title,$description,$url,$status,$encurl,$enclength,$enctype)=@_;
107: my $feedname=&feedname($filename);
108: &Apache::lonnet::put('nohist_all_rss_feeds',
109: { &filterfeedname($filename) => &displayfeedname($filename,$uname,$udom) },
110: $udom,$uname);
1.1 www 111: return &Apache::lonnet::put($feedname,{
112: $id.'_title' => $title,
113: $id.'_description' => $description,
114: $id.'_link' => $url,
115: $id.'_enclosureurl' => $encurl,
116: $id.'_enclosurelength' => $enclength,
117: $id.'_enclosuretype' => $enctype,
118: $id.'_status' => $status},$udom,$uname);
119: }
120:
1.2 www 121: sub changestatus {
122: my ($id,$uname,$udom,$filename,$status)=@_;
123: my $feedname=&feedname($filename);
124: if ($status eq 'deleted') {
125: return &Apache::lonnet::del($feedname,[$id.'_title',
126: $id.'_description',
127: $id.'_link',
128: $id.'_enclosureurl',
129: $id.'_enclosurelength',
130: $id.'_enclosuretype',
131: $id.'_status'],$udom,$uname);
132: } else {
133: return &Apache::lonnet::put($feedname,{$id.'_status' => $status},$udom,$uname);
134: }
135: }
136:
1.1 www 137: sub handler {
138: my $r = shift;
1.5 ! www 139:
! 140: my $edit=0;
! 141: my $html=0;
! 142: my (undef,$mode,$udom,$uname,$filename)=split(/\//,$r->uri);
! 143: if (($mode eq 'adm') && ($env{'user.name'} eq $uname) && ($env{'user.domain'} eq $udom)) {
! 144: $edit=1;
! 145: $html=1;
! 146: }
! 147: if ($filename=~/\.html$/) {
! 148: $html=1;
! 149: }
! 150: if ($html) {
! 151: &Apache::loncommon::content_type($r,'text/html');
! 152: } else {
! 153: # Workaround Mozilla/Firefox
! 154: # &Apache::loncommon::content_type($r,'application/rss+xml');
! 155: &Apache::loncommon::content_type($r,'text/xml');
! 156: }
1.1 www 157: $r->send_http_header;
158: return OK if $r->header_only;
159:
160: my $filterfeedname=&filterfeedname($filename);
161: my $feedname=&feedname($filename);
1.2 www 162: my $displayfeedname=&displayfeedname($filename,$uname,$udom);
1.5 ! www 163: if ($html) {
! 164: $r->print(&Apache::lonxml::xmlbegin().&Apache::loncommon::bodytag
! 165: ($displayfeedname,'','','',$udom,
! 166: $env{'form.register'}));
! 167: } else {
! 168: $r->print("<rss version='2.0' xmlns:dc='http://purl.org/dc/elements/1.1'>\n<channel>".
! 169: "\n<link>http://".$ENV{'HTTP_HOST'}.'/public/'.$udom.'/'.$uname.'/'.
! 170: $filterfeedname.'_rss.html</link>'.
! 171: "\n<description>".
! 172: &mt('An RSS Feed provided by the LON-CAPA Learning Content Management System').
! 173: '</description>');
! 174: }
1.1 www 175: # Is this user for real?
176: my $homeserver=&Apache::lonnet::homeserver($uname,$udom);
177: if ($homeserver eq 'no_host') {
1.5 ! www 178: $r->print(($html?'<h3>':'<title>').&mt('No feed available').($html?'</h3>':'</title>'));
1.1 www 179: } else {
180: # Course or user?
181: my $name='';
182: if ($uname=~/^\d/) {
183: my %cenv=&Apache::lonnet::dump('environment',$udom,$uname);
184: $name=$cenv{'description'};
185: } else {
186: $name=&Apache::loncommon::nickname($uname,$udom);
187: }
1.5 ! www 188: $r->print("\n".
! 189: ($html?'<h3>':'<title>').
! 190: &mt('LON-CAPA Feed "[_1]" for [_2]',$displayfeedname,$name).
! 191: ($html?'</h3>'.($edit?'<form method="post">':'').'<ul>':'</title>'));
1.1 www 192: # Render private items?
193: my $viewpubliconly=1;
194: if (($env{'user.name'} eq $uname) && ($env{'user.domain'} eq $udom)) {
195: $viewpubliconly=0;
196: }
197: # Get feed items
198: my %newsfeed=&Apache::lonnet::dump($feedname,$udom,$uname);
1.4 albertel 199: foreach my $entry (sort(keys(%newsfeed))) {
1.3 albertel 200: if ($entry=~/^(\d+)\_status$/) {
1.1 www 201: my $id=$1;
1.5 ! www 202: if ($edit) {
! 203: my %lt=&Apache::lonlocal::texthash('public' => 'public',
! 204: 'private' => 'private',
! 205: 'hidden' => 'hidden',
! 206: 'delete' => 'delete');
! 207: my %status=();
! 208: $status{$newsfeed{$id.'_status'}}='checked="checked"';
! 209: $r->print(<<ENDEDIT);
! 210: <li>
! 211: <input name='$id\_modified' type='hidden' value='0' />
! 212: <label><input name='$id\_status' type="radio" value="public" $status{'public'}> $lt{'public'}</label>
! 213:
! 214: <label><input name='$id\_status' type="radio" value="private" $status{'private'}> $lt{'private'}</label>
! 215:
! 216: <label><input name='$id\_status' type="radio" value="hidden" $status{'hidden'}> $lt{'hidden'}</label>
! 217:
! 218: <label><input name='$id\_status' type="radio" value="delete"> $lt{'delete'}</label>
! 219: <br />
! 220: <input name='$id\_title' type='text' size='80' value='$newsfeed{$id.'_title'}' /><br />
! 221: <textarea name='$id\_description' rows="6" cols="80">$newsfeed{$id.'_description'}</textarea>
! 222: </li>
! 223: ENDEDIT
! 224: } else {
! 225: if (($newsfeed{$id.'_status'} ne 'public') && ($viewpubliconly)) { next; }
! 226: if ($newsfeed{$id.'_status'} eq 'hidden') { next; }
! 227: $r->print("\n".($html?"\n<li><b>":"<item>\n<title>").$newsfeed{$id.'_title'}.
! 228: ($html?"</b><br />\n":"</title>\n<description>").
! 229: $newsfeed{$id.'_description'}.
! 230: ($html?"<br />\n<a href='":"</description>\n<link>").
! 231: "http://".$ENV{'HTTP_HOST'}.
! 232: $newsfeed{$id.'_link'}.
! 233: ($html?("'>".&mt('Read more')."</a><br />\n"):"</link>\n"));
! 234: if ($newsfeed{$id.'_enclosureurl'}) {
! 235: $r->print(($html?"<a href='":"\n<enclosure url='").
! 236: $newsfeed{$id.'_enclosureurl'}."' length='".$newsfeed{$id.'_enclosurelength'}.
! 237: "' type='".$newsfeed{$id.'_enclosuretype'}.($html?"'>".&mt('Enclosure')."</a>":"' />"));
! 238: }
! 239: if ($html) {
! 240: $r->print("\n<hr /></li>\n");
! 241: } else {
! 242: $r->print("\n<guid isPermaLink='false'>".$id.$filterfeedname.'_'.$udom.'_'.$uname."</guid></item>\n");
! 243: }
1.1 www 244: }
245: }
246: }
247: }
1.5 ! www 248: $r->print("\n".($html?'</ul>'.($edit?'</form>':'').'</body></html>':'</channel></rss>'."\n"));
1.1 www 249: return OK;
250: }
251: 1;
252: __END__
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