-------------------------------------------------------------------------------
-- Emails logging information to the given recipient
--
-- @author Thiago Costa Ponte (thiago@ideais.com.br)
--
-- @copyright 2004-2011 Kepler Project
--
-------------------------------------------------------------------------------

require"logging"
local smtp = require"socket.smtp"

function logging.email(params)

    params = params or {}
    params.headers = params.headers or {}
    
    if params.from == nil then
        return nil, "'from' parameter is required"
    end
    if params.rcpt == nil then
        return nil, "'rcpt' parameter is required"
    end

    return logging.new( function(self, level, message)
                            local s = logging.prepareLogMsg(params.logPattern, os.date(), level, message)
                            if params.headers.subject then
                                params.headers.subject = logging.prepareLogMsg(params.headers.subject, os.date(), level, message)
                            end
                            local msg = { headers = params.headers, body = s }
                            params.source = smtp.message(msg)
                            
                            local r, e = smtp.send(params)
                            if not r then
                                return nil, e
                            end
                            
                            return true
                        end
                      )
end

return logging.email