! Copyright (C) 2007 Elie CHAFTARI
! See https://factorcode.org/license.txt for BSD license.
USING: combinators kernel prettyprint io io.timeouts sequences
namespaces io.sockets io.sockets.secure continuations calendar
io.encodings.ascii io.streams.duplex destructors locals
concurrency.promises threads accessors smtp.private
io.sockets.secure.debug io.crlf ;
IN: smtp.server

! Mock SMTP server for testing purposes.

! $ telnet 127.0.0.1 4321
! Trying 127.0.0.1...
! Connected to localhost.
! Escape character is '^]'.
! 220 hello
! EHLO
! 220 and..?
! MAIL FROM: <here@mail.com>
! 220 OK
! RCPT TO: <there@mail.com>
! 220 OK
! Hi
! 500 ERROR
! DATA
! 354 Enter message, ending with "." on a line by itself
! Hello I am still waiting for your call
! Thanks
! .
! 220 OK
! QUIT
! bye
! Connection closed by foreign host.

SYMBOL: data-mode

: process ( -- )
    read-crlf {
        { [ dup not ] [ f ] }
        {
            [ dup [ "HELO" head? ] [ "EHLO" head? ] bi or ]
            [ "220 and..?\r\n" write flush t ]
        }
        {
            [ dup "STARTTLS" = ]
            [
                "220 2.0.0 Ready to start TLS\r\n" write flush
                accept-secure-handshake t
            ]
        }
        { [ dup "QUIT" = ] [ "220 bye\r\n" write flush f ] }
        { [ dup "MAIL FROM:" head? ] [ "220 OK\r\n" write flush t ] }
        { [ dup "RCPT TO:" head? ] [ "220 OK\r\n" write flush t ] }
        {
            [ dup "DATA" = ]
            [
                data-mode on
                "354 Enter message, ending with \".\" on a line by itself\r\n"
                write flush t
            ]
        }
        {
            [ dup "." = data-mode get and ]
            [
                data-mode off
                "220 OK\r\n" write flush t
            ]
        }
        { [ data-mode get ] [ dup [ print ] with-global t ] }
        [ "500 ERROR\r\n" write flush t ]
    } cond nip [ process ] when ;

:: mock-smtp-server ( promise -- )
    ! Store the port we are running on in the promise.
    [
        [
            "127.0.0.1" 0 <inet4> ascii <server> [
            dup addr>> port>> promise fulfill
                accept drop [
                    1 minutes timeouts
                    "220 hello\r\n" write flush
                    process
                    [ flush ] with-global
                ] with-stream
            ] with-disposal
        ] with-test-context
    ] in-thread ;