docs: function getLastSeen(params, config, conn) {
  
    // defaults
    config = config || require('../config/config.js')
  
    params = params || {}
    params.webid = params.webid || 'http://melvincarvalho.com/#me'
  
    // main
    return new Promise((resolve, reject) => {
  
      if (!conn) {
        var conn = wc_db.getConnection(config.db)
      }
  
      var sql = "select f.* from Fragment f join User u on f.user_id = u.id where u.uri = :webid order by lastSeen desc LIMIT 1;"
      var fragLastSeen
      var mediaLastSeen
      var val
  
      debug('getLastSeen', sql, params)
  
      conn.query(sql, { replacements: { "webid" : params.webid } }).then(function(frag){
        var sql = "select r.* from Rating r join User u on u.id = r.reviewer_id and u.uri = :webid order by datePublished desc LIMIT 1;"
        debug('getLastSeen', sql, params)
        debug(frag)
        val = frag
        fragLastSeen = frag[0][0].lastSeen
        debug(fragLastSeen)
        return conn.query(sql, { replacements: { "webid" : params.webid } })
      }).then(function(media) {
        debug(media)
        mediaLastSeen = media[0][0].datePublished
        debug(mediaLastSeen)
        if (mediaLastSeen > fragLastSeen) {
          debug('media is latest : ' + media.lastSeen)
          return resolve({"ret" : media, "conn" : conn})
        } else {
          debug('frag is latest : ' + media.lastSeen)
          return resolve({"ret" : val, "conn" : conn})
        }
      }).catch(function(err) {
        return reject({"err" : err, "conn" : conn})
      })
  
    })
  
  }