Annotation of loncom/interface/lonrss.pm, revision 1.29
1.1 www 1: # The LearningOnline Network
2: # RSS Feeder
3: #
1.29 ! raeburn 4: # $Id: lonrss.pm,v 1.28 2006/10/02 16:47:57 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;
1.22 albertel 32: use LONCAPA;
1.1 www 33: use Apache::Constants qw(:common);
34: use Apache::loncommon;
35: use Apache::lonnet;
36: use Apache::lontexconvert;
37: use Apache::lonlocal;
38: use Apache::lonhtmlcommon;
39:
1.15 www 40:
1.1 www 41: sub filterfeedname {
42: my $filename=shift;
1.5 www 43: $filename=~s/(\_rss\.html|\.rss)$//;
1.1 www 44: $filename=~s/\W//g;
1.15 www 45: $filename=~s/\_rssfeed$//;
46: $filename=~s/^nohist\_//;
1.1 www 47: return $filename;
48: }
49:
50: sub feedname {
51: return 'nohist_'.&filterfeedname(shift).'_rssfeed';
52: }
53:
54: sub displayfeedname {
1.2 www 55: my ($rawname,$uname,$udom)=@_;
56: my $filterfilename=&filterfeedname($rawname);
57: # do we have a stored name?
1.20 www 58: my %stored=&Apache::lonnet::get('nohist_all_rss_feeds',[$filterfilename,'feed_display_option_'.$filterfilename],$udom,$uname);
59: if ($stored{$filterfilename}) { return ($stored{$filterfilename},$stored{'feed_display_option_'.$filterfilename}); }
1.2 www 60: # no, construct a name
61: my $name=$filterfilename;
62: if ($name=~/^CourseBlog/) {
63: $name=&mt('Course Blog');
64: if ($env{'course.'.$env{'request.course.id'}.'.description'}) {
65: $name.=' '.$env{'course.'.$env{'request.course.id'}.'.description'};
66: }
67: } else {
68: $name=~s/\_/ /g;
69: }
1.20 www 70: return ($name,$stored{'feed_display_option_'.$filterfilename});
1.2 www 71: }
72:
1.19 www 73: sub namefeed {
1.2 www 74: my ($rawname,$uname,$udom,$newname)=@_;
75: return &Apache::lonnet::put('nohist_all_rss_feeds',
76: { &filterfeedname($rawname) => $newname },
77: $udom,$uname);
78: }
79:
1.20 www 80: sub changefeeddisplay {
81: my ($rawname,$uname,$udom,$newstatus)=@_;
82: return &Apache::lonnet::put('nohist_all_rss_feeds',
83: { 'feed_display_option_'.&filterfeedname($rawname) => $newstatus },
84: $udom,$uname);
85: }
86:
1.2 www 87: sub advertisefeeds {
1.6 www 88: my ($uname,$udom,$edit)=@_;
1.2 www 89: my $feeds='';
90: my %feednames=&Apache::lonnet::dump('nohist_all_rss_feeds',$udom,$uname);
1.6 www 91: my $mode='public';
92: if ($edit) {
93: $mode='adm';
94: }
1.29 ! raeburn 95: my $server = &Apache::lonnet::absolute_url();
1.3 albertel 96: foreach my $feed (sort(keys(%feednames))) {
1.24 www 97: if (($feed!~/^error\:/) && ($feed!~/^feed\_display\_option\_/)) {
1.29 ! raeburn 98: my $feedurl= $server.'/public/'.$udom.'/'.$uname.'/'.$feed.'.rss';
! 99: my $htmlurl= $server.'/'.$mode.'/'.$udom.'/'.$uname.'/'.$feed.'_rss.html';
1.20 www 100: if ($feednames{'feed_display_option_'.$feed} eq 'hidden') {
101: if ($edit) {
102: $feeds.='<li><i>'.$feednames{$feed}.'</i><br />'.&mt('Hidden').': <a href="'.$htmlurl.'"><tt>'.$htmlurl.'</tt></a></li>';
103: }
104: } else {
105: $feeds.='<li><b>'.$feednames{$feed}.
106: '</b><br />'.($edit?&mt('Edit'):'HTML').': <a href="'.$htmlurl.'"><tt>'.$htmlurl.'</tt></a>'.
107: '<br />RSS: <a href="'.$feedurl.'"><tt>'.$feedurl.'</tt></a></li>';
108: }
1.2 www 109: }
110: }
111: if ($feeds) {
112: return '<h4>'.&mt('Available RSS Feeds and Blogs').'</h4><ul>'.$feeds.'</ul>';
113: } else {
114: return '';
115: }
1.1 www 116: }
117:
1.12 albertel 118: sub rss_link {
119: my ($url) = @_;
120: return qq|<link rel="alternate" type="application/rss+xml" title="Course Announcements" href="$url" />|;
121: }
122:
1.16 albertel 123: {
124: my $feedcounter;
125: sub get_new_feed_id {
126: $feedcounter++;
127: return time().'00000'.$$.'00000'.$feedcounter;
128: }
129: }
130:
1.15 www 131: sub addentry {
1.16 albertel 132: my $id=&get_new_feed_id();
1.15 www 133: return &editentry($id,@_);
1.2 www 134: }
135:
136: sub editentry {
1.17 www 137: my ($id,$uname,$udom,$filename,$title,$description,$url,$status,$encurl,$enctype)=@_;
1.15 www 138: if ($status eq 'deleted') {
139: return &changestatus($id,$uname,$udom,$filename,$status);
140: }
1.2 www 141: my $feedname=&feedname($filename);
142: &Apache::lonnet::put('nohist_all_rss_feeds',
1.24 www 143: { &filterfeedname($filename) =>
144: (&displayfeedname($filename,$uname,$udom))[0] },
1.2 www 145: $udom,$uname);
1.1 www 146: return &Apache::lonnet::put($feedname,{
147: $id.'_title' => $title,
148: $id.'_description' => $description,
149: $id.'_link' => $url,
150: $id.'_enclosureurl' => $encurl,
151: $id.'_enclosuretype' => $enctype,
152: $id.'_status' => $status},$udom,$uname);
153: }
154:
1.2 www 155: sub changestatus {
156: my ($id,$uname,$udom,$filename,$status)=@_;
157: my $feedname=&feedname($filename);
158: if ($status eq 'deleted') {
159: return &Apache::lonnet::del($feedname,[$id.'_title',
160: $id.'_description',
161: $id.'_link',
162: $id.'_enclosureurl',
163: $id.'_enclosuretype',
164: $id.'_status'],$udom,$uname);
165: } else {
166: return &Apache::lonnet::put($feedname,{$id.'_status' => $status},$udom,$uname);
167: }
168: }
169:
1.8 albertel 170: sub changed_js {
171: return <<ENDSCRIPT;
172: <script type="text/javascript">
173: function changed(tform,id) {
174: tform.elements[id+"_modified"].checked=true;
175: }
176: </script>
1.11 albertel 177: ENDSCRIPT
1.8 albertel 178: }
179:
1.17 www 180: sub determine_enclosure_types {
181: my ($url)=@_;
182: my ($ending)=($url=~/\.(\w+)$/);
183: return &Apache::loncommon::filemimetype($ending);
184: }
185:
1.21 www 186: sub course_blog_link {
187: my ($id,$title,$description,$url,$encurl,$enctype)=@_;
188: if ($env{'request.course.id'}) {
189: return &add_blog_entry_link($id,
190: $env{'course.'.$env{'request.course.id'}.'.num'},
191: $env{'course.'.$env{'request.course.id'}.'.domain'},
192: 'Course_Announcements',
193: $title,$description,$url,'public',$encurl,$enctype,
194: &mt('Add to Course Announcements'));
195: } else {
196: return '';
197: }
198: }
199:
200: sub add_blog_entry_link {
201: my ($id,$uname,$udom,$filename,$title,$description,$url,$status,$encurl,$enctype,$linktext)=@_;
202: return "<a href='/adm/$udom/$uname/".&filterfeedname($filename).'_rss.html?queryid='.
1.22 albertel 203: &escape($id).
1.27 albertel 204: '&title='.&escape($title).
205: '&description='.&escape($description).
206: '&url='.&escape($url).
207: '&status='.&escape($status).
208: '&encurl='.&escape($encurl).
209: '&enctype='.&escape($enctype).
1.21 www 210: "'>".$linktext.'</a>';
211:
212: }
213:
1.29 ! raeburn 214: sub blocking_blogdisplay {
! 215: my ($uname,$udom,$html,$filterfeedname) = @_;
! 216: my $user = &Apache::loncommon::plainname($uname,$udom);
! 217: if ($html) {
! 218: $user = &Apache::loncommon::aboutmewrapper($user,$uname,$udom);
! 219: } else {
! 220: $user = $user.' ('.$uname.':'.$udom.')';
! 221: }
! 222: my %setters;
! 223: my ($blocked,$output,$blockcause);
! 224: my ($startblock,$endblock) =
! 225: &Apache::loncommon::blockcheck(\%setters,'blogs');
! 226: if ($startblock && $endblock) {
! 227: $blockcause = 'user';
! 228: } else {
! 229: if (($uname ne $env{'user.name'}) || ($udom ne $env{'user.domain'})) {
! 230: ($startblock,$endblock) =
! 231: &Apache::loncommon::blockcheck(\%setters,'blogs',
! 232: $uname,$udom);
! 233: $blockcause = 'blogowner';
! 234: }
! 235: }
! 236: if ($startblock && $endblock) {
! 237: $blocked = 1;
! 238: my $showstart = &Apache::lonlocal::locallocaltime($startblock);
! 239: my $showend = &Apache::lonlocal::locallocaltime($endblock);
! 240: $output = &mt('Blogs belonging to [_1] are unavailable from [_2] to [_3].',$user,$showstart,$showend);
! 241: if ($html) {$output.='<br />';}
! 242: if ($blockcause eq 'user') {
! 243: $output .= &mt('This is because you are a student in one or more courses in which communication is being blocked.');
! 244: if ($html) {
! 245: $output .= '<br />'.
! 246: &Apache::loncommon::build_block_table($startblock,
! 247: $endblock,\%setters);
! 248: }
! 249: } else {
! 250: $output .= &mt('This is because the blog owner is a student in one or more courses in which communication is being blocked.');
! 251: }
! 252: if (!$html) {
! 253: my $id = &get_new_feed_id();
! 254: $output = '<title/><item><title/><description>'.$output."</description><link/><guid isPermaLink='false'>".$id.$filterfeedname.'_'.$udom.'_'.$uname.'</guid></item>';
! 255: }
! 256: }
! 257: return ($blocked,$output);
! 258: }
! 259:
1.1 www 260: sub handler {
1.8 albertel 261: my ($r) = @_;
1.5 www 262:
263: my $edit=0;
264: my $html=0;
265: my (undef,$mode,$udom,$uname,$filename)=split(/\//,$r->uri);
266: if (($mode eq 'adm') && ($env{'user.name'} eq $uname) && ($env{'user.domain'} eq $udom)) {
267: $edit=1;
268: $html=1;
269: }
1.21 www 270: if (($mode eq 'adm') && (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
271: $edit=1;
272: $html=1;
273: }
1.5 www 274: if ($filename=~/\.html$/) {
275: $html=1;
276: }
277: if ($html) {
278: &Apache::loncommon::content_type($r,'text/html');
279: } else {
280: # Workaround Mozilla/Firefox
281: # &Apache::loncommon::content_type($r,'application/rss+xml');
282: &Apache::loncommon::content_type($r,'text/xml');
283: }
1.1 www 284: $r->send_http_header;
285: return OK if $r->header_only;
286:
287: my $filterfeedname=&filterfeedname($filename);
288: my $feedname=&feedname($filename);
1.20 www 289: my ($displayfeedname,$displayoption)=&displayfeedname($filename,$uname,$udom);
1.29 ! raeburn 290: my ($blocked,$blocktext);
! 291: if ($uname !~ /^\d\w\d[\w\-.]+$/) {
! 292: ($blocked,$blocktext) = &blocking_blogdisplay($uname,$udom,$html,$filterfeedname);
! 293: }
1.5 www 294: if ($html) {
1.25 albertel 295: my $title = $displayfeedname?$displayfeedname
296: :"Available RSS Feeds and Blogs";
1.26 albertel 297: $r->print(&Apache::loncommon::start_page($title,undef,
1.13 albertel 298: {'domain' => $udom,
299: 'force_register' =>
300: $env{'form.register'}}).
1.8 albertel 301: &changed_js());
1.18 www 302: } else { # render RSS
1.29 ! raeburn 303: my $server = &Apache::lonnet::absolute_url();
1.5 www 304: $r->print("<rss version='2.0' xmlns:dc='http://purl.org/dc/elements/1.1'>\n<channel>".
1.29 ! raeburn 305: "\n".'<link>'.$server.'/public/'.$udom.'/'.$uname.'/'.
1.5 www 306: $filterfeedname.'_rss.html</link>'.
307: "\n<description>".
308: &mt('An RSS Feed provided by the LON-CAPA Learning Content Management System').
309: '</description>');
310: }
1.21 www 311: # This will be the entry id for new additions to the blog
1.16 albertel 312: my $newid = &get_new_feed_id();
1.1 www 313: # Is this user for real?
1.6 www 314: my $homeserver=&Apache::lonnet::homeserver($uname,$udom);
1.29 ! raeburn 315: if ($html && !$blocked) {
1.19 www 316: # Any new feeds or renaming of feeds?
317: if ($edit) {
1.20 www 318: # Hide a feed?
319: if ($env{'form.hidethisblog'}) {
320: &changefeeddisplay($feedname,$uname,$udom,'hidden');
321: ($displayfeedname,$displayoption)=&displayfeedname($filename,$uname,$udom);
322: }
323: # Advertise a feed?
324: if ($env{'form.advertisethisblog'}) {
325: &changefeeddisplay($feedname,$uname,$udom,'public');
326: ($displayfeedname,$displayoption)=&displayfeedname($filename,$uname,$udom);
327: }
1.19 www 328: # New feed?
329: if ($env{'form.namenewblog'}=~/\w/) {
330: &namefeed($env{'form.namenewblog'},$uname,$udom,$env{'form.namenewblog'});
331: }
332: # Old feed that is being renamed?
333: if (($displayfeedname) && ($env{'form.newblogname'}=~/\w/)) {
334: if ($env{'form.newblogname'} ne $displayfeedname) {
335: &namefeed($feedname,$uname,$udom,$env{'form.newblogname'});
1.20 www 336: ($displayfeedname,$displayoption)=&displayfeedname($filename,$uname,$udom);
1.19 www 337: }
338: }
339: }
1.6 www 340: $r->print(&advertisefeeds($uname,$udom,$edit));
341: }
1.1 www 342: if ($homeserver eq 'no_host') {
1.5 www 343: $r->print(($html?'<h3>':'<title>').&mt('No feed available').($html?'</h3>':'</title>'));
1.29 ! raeburn 344: } elsif ($blocked) {
! 345: $r->print($blocktext);
! 346: $r->print(($html?&Apache::loncommon::end_page():'</channel></rss>'."\n"));
1.18 www 347: } else { # is indeed a user
1.1 www 348: # Course or user?
349: my $name='';
1.29 ! raeburn 350: if ($uname =~ /^\d\w\d[\w\-.]+$/) {
1.1 www 351: my %cenv=&Apache::lonnet::dump('environment',$udom,$uname);
352: $name=$cenv{'description'};
353: } else {
354: $name=&Apache::loncommon::nickname($uname,$udom);
355: }
1.19 www 356: # Add a new feed
357: if (($html) && ($edit)) {
358: $r->print('<form method="post">');
1.21 www 359: $r->print(&mt('Name for New Feed').": <input type='text' size='40' name='namenewblog' />");
360: $r->print('<input type="submit" value="'.&mt('Start a New Feed').'" />');
1.19 www 361: $r->print('</form>');
362: }
1.18 www 363: if ($displayfeedname) { # this is an existing feed
364: # Anything to store?
365: if ($edit) {
1.21 www 366: # check if this was called with a query string
367: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['queryid']);
368: if ($env{'form.queryid'}) {
369: # yes, collect the remainder
370: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
371: ['title',
372: 'description',
373: 'url',
374: 'status',
375: 'enclosureurl',
376: 'enclosuretype']);
377: # my ($id,$uname,$udom,$filename,$title,$description,$url,$status,$encurl,$enctype)=@_;
378:
379: &editentry($env{'form.queryid'},
380: $uname,$udom,$filename,
381: $env{'form.title'},
382: $env{'form.description'},
383: $env{'form.url'},
384: $env{'form.status'},
385: $env{'form.encurl'},
386: $env{'form.enctype'}
387: );
388: }
1.18 www 389: my %newsfeed=&Apache::lonnet::dump($feedname,$udom,$uname);
390: foreach my $entry (sort(keys(%newsfeed)),$env{'form.newid'}.'_status') {
391: if ($entry=~/^(\d+)\_status$/) {
392: my $id=$1;
393: if ($env{'form.'.$id.'_modified'}) {
394: &editentry($id,$uname,$udom,$feedname,
395: $env{'form.'.$id.'_title'},
396: $env{'form.'.$id.'_description'},
1.28 albertel 397: $env{'form.'.$id.'_link'},
1.21 www 398: $env{'form.'.$id.'_status'},
399: $env{'form.'.$id.'_enclosureurl'},
400: $env{'form.'.$id.'_enclosuretype'},
401: );
1.18 www 402: }
403: }
404: }
405: } #done storing
406:
1.29 ! raeburn 407: # Render private items?
! 408: my $viewpubliconly=1;
1.18 www 409: $r->print("\n".
1.19 www 410: ($html?'<hr /><h3>':'<title>').
1.18 www 411: &mt('LON-CAPA Feed "[_1]" for [_2]',$displayfeedname,$name).
1.20 www 412: ($displayoption eq 'hidden'?' ('.&mt('Hidden').')':'').
1.18 www 413: ($html?'</h3>'.($edit?'<form method="post"><br />'.
1.21 www 414: &mt('Name of this Feed').
1.18 www 415: ': <input type="text" size="50" name="newblogname" value="'.
416: $displayfeedname.'" />':'').'<ul>':'</title>'));
417: if (($env{'user.name'} eq $uname) && ($env{'user.domain'} eq $udom)) {
418: $viewpubliconly=0;
1.29 ! raeburn 419: }
1.1 www 420: # Get feed items
1.18 www 421: my %newsfeed=&Apache::lonnet::dump($feedname,$udom,$uname);
422: foreach my $entry (sort(keys(%newsfeed)),$newid.'_status') {
423: if ($entry=~/^(\d+)\_status$/) { # is an entry
424: my $id=$1;
425: if ($edit) {
426: my %lt=&Apache::lonlocal::texthash('public' => 'public',
427: 'private' => 'private',
428: 'hidden' => 'hidden',
429: 'delete' => 'delete',
430: 'store' => 'Store changes',
431: 'title' => 'Title',
432: 'link' => 'Link',
433: 'description' => 'Description');
434: my %status=();
435: unless ($newsfeed{$id.'_status'}) { $newsfeed{$id.'_status'}='public'; }
436: $status{$newsfeed{$id.'_status'}}='checked="checked"';
437: $r->print(<<ENDEDIT);
1.5 www 438: <li>
1.15 www 439: <label><input name='$id\_modified' type='checkbox' value="modified" /> $lt{'store'}</label>
1.6 www 440:
441: <label><input name='$id\_status' type="radio" value="public" $status{'public'} onClick="changed(this.form,'$id');" /> $lt{'public'}</label>
1.5 www 442:
1.6 www 443: <label><input name='$id\_status' type="radio" value="private" $status{'private'} onClick="changed(this.form,'$id');" /> $lt{'private'}</label>
1.5 www 444:
1.6 www 445: <label><input name='$id\_status' type="radio" value="hidden" $status{'hidden'} onClick="changed(this.form,'$id');" /> $lt{'hidden'}</label>
1.5 www 446:
1.15 www 447: <label><input name='$id\_status' type="radio" value="deleted" onClick="changed(this.form,'$id');" /> $lt{'delete'}</label>
1.5 www 448: <br />
1.18 www 449: $lt{'title'}:
450: <input name='$id\_title' type='text' size='60' value='$newsfeed{$id.'_title'}' onChange="changed(this.form,'$id');" /><br />
451: $lt{'description'}:<br />
1.6 www 452: <textarea name='$id\_description' rows="6" cols="80" onChange="changed(this.form,'$id');">$newsfeed{$id.'_description'}</textarea><br />
1.18 www 453: $lt{'link'}:
454: <input name='$id\_link' type='text' size='60' value='$newsfeed{$id.'_link'}' onChange="changed(this.form,'$id');" />
1.6 www 455: <hr /></li>
1.5 www 456: ENDEDIT
1.18 www 457: } else { # not in edit mode, just displaying
458: if (($newsfeed{$id.'_status'} ne 'public') && ($viewpubliconly)) { next; }
459: if ($newsfeed{$id.'_status'} eq 'hidden') { next; }
1.28 albertel 460: my $link = $newsfeed{$id.'_link'};
461: if ($link =~ m|^/| ) {
462: $link = "http://".$ENV{'HTTP_HOST'}.$link;
463: }
1.18 www 464: $r->print("\n".($html?"\n<li><b>":"<item>\n<title>").$newsfeed{$id.'_title'}.
465: ($html?"</b><br />\n":"</title>\n<description>").
466: $newsfeed{$id.'_description'}.
467: ($html?"<br />\n<a href='":"</description>\n<link>").
1.28 albertel 468:
469: $link.
1.18 www 470: ($html?("'>".&mt('Read more')."</a><br />\n"):"</link>\n"));
1.17 www 471: # Enclosure? Get stats
1.18 www 472: if ($newsfeed{$id.'_enclosureurl'}) {
473: my @stat=&Apache::lonnet::stat_file($newsfeed{$id.'_enclosureurl'});
474: if ($stat[7]) {
1.17 www 475: # Has non-zero length (and exists)
1.18 www 476: my $enclosuretype=$newsfeed{$id.'_enclosetype'};
477: $r->print(($html?"<a href='":"\n<enclosure url='").
478: $newsfeed{$id.'_enclosureurl'}."' length='".$stat[7].
479: "' type='".$enclosuretype.($html?"'>".&mt('Enclosure')."</a>":"' />"));
480: }
481: }
482: if ($html) { # is HTML
483: $r->print("\n<hr /></li>\n");
484: } else { # is RSS
485: $r->print("\n<guid isPermaLink='false'>".$id.$filterfeedname.'_'.$udom.'_'.$uname."</guid></item>\n");
1.17 www 486: }
1.18 www 487: } # end of "in edit mode"
488: } # end of rendering a real entry
489: } # end of loop through all keys
490: if ($html) {
491: $r->print('</ul>');
492: if ($edit) {
1.20 www 493: $r->print('<input type="hidden" name="newid" value="'.$newid.'"/><input type="submit" value="'.&mt('Store Marked Changes').'" />'.
494: ($displayoption eq 'hidden'?'<input type="submit" name="advertisethisblog" value="'.&mt('Advertise this Feed').'" />':
495: '<input type="submit" name="hidethisblog" value="'.&mt('Hide this Feed').'" />'));
1.1 www 496: }
497: }
1.18 www 498: } # was a real display feedname
499: $r->print(($html?'</form>'.&Apache::loncommon::end_page():'</channel></rss>'."\n"));
500: } # a real user
1.1 www 501: return OK;
1.18 www 502: } # end handler
1.1 www 503: 1;
504: __END__
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