docs: def add_computer(self, ip, hostname, domain, os, dc=None):
          """
          Check if this host has already been added to the database, if not add it in.
          """
          domain = domain.split('.')[0].upper()
          cur = self.conn.cursor()
  
          cur.execute('SELECT * FROM computers WHERE ip LIKE ?', [ip])
          results = cur.fetchall()
  
          if not len(results):
              cur.execute("INSERT INTO computers (ip, hostname, domain, os, dc) VALUES (?,?,?,?,?)", [ip, hostname, domain, os, dc])
          else:
              for host in results:
                  if (hostname != host[2]) or (domain != host[3]) or (os != host[4]):
                      cur.execute("UPDATE computers SET hostname=?, domain=?, os=? WHERE id=?", [hostname, domain, os, host[0]])
                  if dc != None and (dc != host[5]):
                      cur.execute("UPDATE computers SET dc=? WHERE id=?", [dc, host[0]])
  
          cur.close()
  
          return cur.lastrowid