initial cc support

bot/email.go

@@ -25,8 +25,10 @@ const (
 	eventReferencesKey = "cc.etke.postmoogle.references"
 	eventInReplyToKey  = "cc.etke.postmoogle.inReplyTo"
 	eventSubjectKey    = "cc.etke.postmoogle.subject"
+	eventRcptToKey     = "cc.etke.postmoogle.rcptTo"
 	eventFromKey       = "cc.etke.postmoogle.from"
 	eventToKey         = "cc.etke.postmoogle.to"
+	eventCcKey         = "cc.etke.postmoogle.cc"
 )
 
 // SetSendmail sets mail sending func to the bot

bot/settings_room.go

@@ -152,7 +152,9 @@ func (s roomSettings) ContentOptions() *utils.ContentOptions {
 		Threads:   !s.NoThreads(),
 
 		ToKey:         eventToKey,
+		CcKey:         eventCcKey,
 		FromKey:       eventFromKey,
+		RcptToKey:     eventRcptToKey,
 		SubjectKey:    eventSubjectKey,
 		MessageIDKey:  eventMessageIDkey,
 		InReplyToKey:  eventInReplyToKey,

smtp/server.go

@@ -60,6 +60,7 @@ func (m *mailServer) Login(state *smtp.ConnectionState, username, password strin
 		from:     username,
 		log:      m.log,
 		domains:  m.domains,
+		tos:      []string{},
 	}, nil
 }
 
@@ -80,6 +81,7 @@ func (m *mailServer) AnonymousLogin(state *smtp.ConnectionState) (smtp.Session,
 		log:          m.log,
 		domains:      m.domains,
 		addr:         state.RemoteAddr,
+		tos:          []string{},
 	}, nil
 }
 

smtp/session.go

@@ -28,7 +28,7 @@ type incomingSession struct {
 
 	ctx  context.Context
 	addr net.Addr
-	to   string
+	tos  []string
 	from string
 }
 
@@ -46,7 +46,7 @@ func (s *incomingSession) Mail(from string, opts smtp.MailOptions) error {
 
 func (s *incomingSession) Rcpt(to string) error {
 	sentry.GetHubFromContext(s.ctx).Scope().SetTag("to", to)
-	s.to = to
+	s.tos = append(s.tos, to)
 	var domainok bool
 	for _, domain := range s.domains {
 		if utils.Hostname(to) == domain {
@@ -66,7 +66,7 @@ func (s *incomingSession) Rcpt(to string) error {
 	}
 
 	validations := s.getFilters(roomID)
-	if !validateEmail(s.from, s.to, s.log, validations) {
+	if !validateEmail(s.from, to, s.log, validations) {
 		s.ban(s.addr)
 		return ErrBanned
 	}
@@ -89,20 +89,15 @@ func (s *incomingSession) Data(r io.Reader) error {
 		return err
 	}
 
-	files := parseAttachments(eml.Attachments, s.log)
-
-	email := utils.NewEmail(
-		eml.GetHeader("Message-Id"),
-		eml.GetHeader("In-Reply-To"),
-		eml.GetHeader("References"),
-		eml.GetHeader("Subject"),
-		s.from,
-		s.to,
-		eml.Text,
-		eml.HTML,
-		files)
-
-	return s.receiveEmail(s.ctx, email)
+	email := utils.FromEnvelope(s.tos[0], eml)
+	for _, to := range s.tos {
+		email.RcptTo = to
+		err := s.receiveEmail(s.ctx, email)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
 }
 func (s *incomingSession) Reset()        {}
 func (s *incomingSession) Logout() error { return nil }
@@ -115,7 +110,7 @@ type outgoingSession struct {
 	domains  []string
 
 	ctx  context.Context
-	to   string
+	tos  []string
 	from string
 }
 
@@ -129,7 +124,7 @@ func (s *outgoingSession) Mail(from string, opts smtp.MailOptions) error {
 
 func (s *outgoingSession) Rcpt(to string) error {
 	sentry.GetHubFromContext(s.ctx).Scope().SetTag("to", to)
-	s.to = to
+	s.tos = append(s.tos, to)
 
 	s.log.Debug("mail to %s", to)
 	return nil
@@ -141,21 +136,16 @@ func (s *outgoingSession) Data(r io.Reader) error {
 	if err != nil {
 		return err
 	}
+	email := utils.FromEnvelope(s.tos[0], eml)
+	for _, to := range s.tos {
+		email.RcptTo = to
+		err := s.sendmail(email.From, to, email.Compose(s.privkey))
+		if err != nil {
+			return err
+		}
+	}
 
-	files := parseAttachments(eml.Attachments, s.log)
-
-	email := utils.NewEmail(
-		eml.GetHeader("Message-Id"),
-		eml.GetHeader("In-Reply-To"),
-		eml.GetHeader("References"),
-		eml.GetHeader("Subject"),
-		s.from,
-		s.to,
-		eml.Text,
-		eml.HTML,
-		files)
-
-	return s.sendmail(email.From, email.To, email.Compose(s.privkey))
+	return nil
 }
 func (s *outgoingSession) Reset()        {}
 func (s *outgoingSession) Logout() error { return nil }
@@ -170,16 +160,3 @@ func validateEmail(from, to string, log *logger.Logger, options utils.IncomingFi
 
 	return v.Email(from)
 }
-
-func parseAttachments(parts []*enmime.Part, log *logger.Logger) []*utils.File {
-	files := make([]*utils.File, 0, len(parts))
-	for _, attachment := range parts {
-		for _, err := range attachment.Errors {
-			log.Warn("attachment error: %v", err)
-		}
-		file := utils.NewFile(attachment.FileName, attachment.Content)
-		files = append(files, file)
-	}
-
-	return files
-}

utils/email.go

@@ -34,6 +34,8 @@ type Email struct {
 	References string
 	From       string
 	To         string
+	RcptTo     string
+	CC         string
 	Subject    string
 	Text       string
 	HTML       string
@@ -56,6 +58,8 @@ type ContentOptions struct {
 	SubjectKey    string
 	FromKey       string
 	ToKey         string
+	CcKey         string
+	RcptToKey     string
 }
 
 // AddressValid checks if email address is valid
@@ -64,6 +68,16 @@ func AddressValid(email string) bool {
 	return err == nil
 }
 
+// EmailDate returns Date in RFC1123 with numeric timezone
+func EmailDate(original ...time.Time) string {
+	now := time.Now().UTC()
+	if len(original) > 0 && !original[0].IsZero() {
+		now = original[0]
+	}
+
+	return now.Format(time.RFC1123Z)
+}
+
 // MessageID generates email Message-Id from matrix event ID
 func MessageID(eventID id.EventID, domain string) string {
 	return fmt.Sprintf("<%s@%s>", eventID, domain)
@@ -72,12 +86,13 @@ func MessageID(eventID id.EventID, domain string) string {
 // NewEmail constructs Email object
 func NewEmail(messageID, inReplyTo, references, subject, from, to, text, html string, files []*File) *Email {
 	email := &Email{
-		Date:       time.Now().UTC().Format(time.RFC1123Z),
+		Date:       EmailDate(),
 		MessageID:  messageID,
 		InReplyTo:  inReplyTo,
 		References: references,
 		From:       from,
 		To:         to,
+		RcptTo:     to,
 		Subject:    subject,
 		Text:       text,
 		HTML:       html,
@@ -92,10 +107,46 @@ func NewEmail(messageID, inReplyTo, references, subject, from, to, text, html st
 	return email
 }
 
+func FromEnvelope(rcptto string, eml *enmime.Envelope) *Email {
+	datetime, _ := eml.Date() //nolint:errcheck // handled in EmailDate()
+	date := EmailDate(datetime)
+
+	var html string
+	if eml.HTML != "" {
+		html = styleRegex.ReplaceAllString(eml.HTML, "")
+	}
+
+	files := make([]*File, 0, len(eml.Attachments))
+	for _, attachment := range eml.Attachments {
+		for _, err := range attachment.Errors {
+			log.Warn("attachment error: %v", err)
+		}
+		file := NewFile(attachment.FileName, attachment.Content)
+		files = append(files, file)
+	}
+
+	email := &Email{
+		Date:       date,
+		MessageID:  eml.GetHeader("Message-Id"),
+		InReplyTo:  eml.GetHeader("In-Reply-To"),
+		References: eml.GetHeader("References"),
+		From:       eml.GetHeader("From"),
+		To:         eml.GetHeader("To"),
+		RcptTo:     rcptto,
+		CC:         eml.GetHeader("Cc"),
+		Subject:    eml.GetHeader("Subject"),
+		Text:       eml.Text,
+		HTML:       html,
+		Files:      files,
+	}
+
+	return email
+}
+
 // Mailbox returns postmoogle's mailbox, parsing it from FROM (if incoming=false) or TO (incoming=true)
 func (e *Email) Mailbox(incoming bool) string {
 	if incoming {
-		return Mailbox(e.To)
+		return Mailbox(e.RcptTo)
 	}
 	return Mailbox(e.From)
 }
@@ -133,8 +184,10 @@ func (e *Email) Content(threadID id.EventID, options *ContentOptions) *event.Con
 			options.InReplyToKey:  e.InReplyTo,
 			options.ReferencesKey: e.References,
 			options.SubjectKey:    e.Subject,
+			options.RcptToKey:     e.RcptTo,
 			options.FromKey:       e.From,
 			options.ToKey:         e.To,
+			options.CcKey:         e.CC,
 		},
 		Parsed: &parsed,
 	}