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   1  <?php
   2  
   3      require_once($CFG->dirroot.'/lib/rsslib.php');
   4      require_once($CFG->dirroot .'/blog/lib.php');
   5  
   6  
   7      // This function returns the icon (from theme) with the link to rss/file.php
   8      // needs some hacking to rss/file.php
   9      function blog_rss_print_link($filtertype, $filterselect, $tagid=0, $tooltiptext='') {
  10  
  11          global $CFG, $USER;
  12  
  13          if (empty($USER->id)) {
  14              $userid = 1;
  15          } else {
  16              $userid = $USER->id;
  17          }
  18  
  19          switch ($filtertype) {
  20              case 'site':
  21                  $path = SITEID.'/'.$userid.'/blog/site/'.SITEID;
  22              break;
  23              case 'course':
  24                  $path = $filterselect.'/'.$userid.'/blog/course/'.$filterselect;
  25              break;
  26              case 'group':
  27                  $path = SITEID.'/'.$userid.'/blog/group/'.$filterselect;  
  28              break;
  29              case 'user':
  30                  $path = SITEID.'/'.$userid.'/blog/user/'.$filterselect;
  31              break;
  32          }
  33  
  34          if ($tagid) {
  35              $path .= '/'.$tagid;
  36          }
  37  
  38          $path .= '/rss.xml';
  39          $rsspix = $CFG->pixpath .'/i/rss.gif';
  40  
  41          require_once($CFG->libdir.'/filelib.php');
  42          $path = get_file_url($path, null, 'rssfile');
  43          print '<div align="right"><a href="'. $path .'"><img src="'. $rsspix .'" title="'. strip_tags($tooltiptext) .'" alt="'.get_string('rss').'" /></a></div>';
  44  
  45      }
  46  
  47  
  48      // Generate any blog RSS feed via one function (called by ../rss/file.php)
  49      function blog_generate_rss_feed($type, $id, $tagid=0) {
  50          global $CFG, $SITE;
  51  
  52          if (empty($CFG->enablerssfeeds)) {
  53              debugging('Sorry, RSS feeds are disabled on this site');
  54              return '';
  55          }
  56  
  57          $filename = blog_rss_file_name($type, $id, $tagid);
  58  
  59          if (file_exists($filename)) {
  60              if (filemtime($filename) + 3600 > time()) {
  61                  return $filename;   /// It's already done so we return cached version
  62              }
  63          }
  64  
  65      /// Get all the posts from the database
  66  
  67          $blogposts = blog_fetch_entries('', 20, '', $type, $id, $tagid);
  68  
  69      /// Now generate an array of RSS items
  70          if ($blogposts) {
  71              $items = array();
  72              foreach ($blogposts as $blogpost) {
  73                  $item = NULL;
  74                  $item->author = fullname(get_record('user','id',$blogpost->userid));
  75                  $item->title = $blogpost->subject;
  76                  $item->pubdate = $blogpost->lastmodified;
  77                  $item->link = $CFG->wwwroot.'/blog/index.php?postid='.$blogpost->id;
  78                  $item->description = format_text($blogpost->summary, $blogpost->format);
  79                  $items[] = $item;
  80              }
  81              $articles = rss_add_items($items);   /// Change structure to XML
  82          } else {
  83              $articles = '';
  84          }
  85  
  86      /// Get header and footer information
  87       
  88          switch ($type) {
  89              case 'user':
  90                  $info = fullname(get_record('user', 'id', $id, '','','','','firstname,lastname'));
  91                  break;
  92              case 'course':
  93                  $info = get_field('course', 'fullname', 'id', $id);
  94                  break;
  95              case 'site':
  96                  $info = $SITE->fullname;
  97                  break;
  98              case 'group':
  99                  $group = groups_get_group($id, false);
 100                  $info = $group->name; //TODO: get_field('groups', 'name', 'id', $id)
 101                  break;
 102              default:
 103                  $info = '';
 104                  break;
 105          }
 106  
 107          if ($tagid) {
 108              $info .= ': '.get_field('tags', 'text', 'id', $tagid);
 109          }
 110  
 111          $header = rss_standard_header(get_string($type.'blog','blog', $info), 
 112                                        $CFG->wwwroot.'/blog/index.php', 
 113                                        get_string('intro','blog'));
 114                                                        
 115          $footer = rss_standard_footer();
 116  
 117  
 118      /// Save the XML contents to file.
 119  
 120          $rssdata = $header.$articles.$footer;
 121  
 122          if (blog_rss_save_file($type,$id,$tagid,$rssdata)) {
 123              return $filename;
 124          } else {
 125              return false;   // Couldn't find it or make it
 126          }
 127      }
 128  
 129  
 130      function blog_rss_file_name($type, $id, $tagid=0) {
 131          global $CFG;
 132  
 133          if ($tagid) {
 134              return "$CFG->dataroot/rss/blog/$type/$id/$tagid.xml";
 135          } else {
 136              return "$CFG->dataroot/rss/blog/$type/$id.xml";
 137          }
 138      }
 139      
 140      //This function saves to file the rss feed specified in the parameters
 141      function blog_rss_save_file($type, $id, $tagid=0, $contents='') {
 142          global $CFG;
 143  
 144          if (! $basedir = make_upload_directory("rss/blog/$type/$id")) {
 145              return false;
 146          }
 147  
 148          $file = blog_rss_file_name($type, $id, $tagid);
 149          $rss_file = fopen($file, 'w');
 150          if ($rss_file) {
 151              $status = fwrite ($rss_file, $contents);
 152              fclose($rss_file);
 153          } else {
 154              $status = false;
 155          }
 156  
 157          return $status;
 158      }
 159  
 160  ?>