add !pm threadify option, fixes #60

README.md

@@ -125,6 +125,7 @@ If you want to change them - check available options in the help message (`!pm h
 
 * **`!pm autoreply`** - Get or set autoreply of the room (markdown supported) that will be sent on any new incoming email thread
 * **`!pm signature`** - Get or set signature of the room (markdown supported)
+* **`!pm threadify`** - Get or set `threadify` of the room (`true` - send incoming email body in thread; `false` - send incoming email body as part of the message)
 * **`!pm nosend`** - Get or set `nosend` of the room (`true` - disable email sending; `false` - enable email sending)
 * **`!pm noreplies`** - Get or set `noreplies` of the room (`true` - ignore matrix replies; `false` - parse matrix replies)
 * **`!pm nosender`** - Get or set `nosender` of the room (`true` - hide email sender; `false` - show email sender)

bot/command.go

@@ -116,6 +116,15 @@ func (b *Bot) initCommands() commandList {
 			sanitizer:   func(s string) string { return s },
 			allowed:     b.allowOwner,
 		},
+		{
+			key: config.RoomThreadify,
+			description: fmt.Sprintf(
+				"Get or set `%s` of the room (`true` - send incoming email body in thread; `false` - send incoming email body as part of the message)",
+				config.RoomThreadify,
+			),
+			sanitizer: utils.SanitizeBoolString,
+			allowed:   b.allowOwner,
+		},
 		{
 			key: config.RoomNoSend,
 			description: fmt.Sprintf(

bot/config/room.go

@@ -22,6 +22,7 @@ const (
 	RoomSignature = "signature"
 	RoomAutoreply = "autoreply"
 
+	RoomThreadify   = "threadify"
 	RoomNoCC        = "nocc"
 	RoomNoFiles     = "nofiles"
 	RoomNoHTML      = "nohtml"
@@ -79,6 +80,10 @@ func (s Room) Autoreply() string {
 	return s.Get(RoomAutoreply)
 }
 
+func (s Room) Threadify() bool {
+	return utils.Bool(s.Get(RoomThreadify))
+}
+
 func (s Room) NoSend() bool {
 	return utils.Bool(s.Get(RoomNoSend))
 }
@@ -193,6 +198,7 @@ func (s Room) ContentOptions() *email.ContentOptions {
 		Recipient: !s.NoRecipient(),
 		Subject:   !s.NoSubject(),
 		Threads:   !s.NoThreads(),
+		Threadify: s.Threadify(),
 
 		ToKey:         "cc.etke.postmoogle.to",
 		CcKey:         "cc.etke.postmoogle.cc",

bot/email.go

@@ -154,6 +154,13 @@ func (b *Bot) IncomingEmail(ctx context.Context, eml *email.Email) error {
 	b.setThreadID(roomID, eml.MessageID, threadID)
 	b.setLastEventID(roomID, threadID, eventID)
 
+	if newThread && cfg.Threadify() {
+		_, berr := b.lp.Send(roomID, eml.ContentBody(threadID, cfg.ContentOptions()))
+		if berr != nil {
+			return berr
+		}
+	}
+
 	if !cfg.NoInlines() {
 		b.sendFiles(ctx, roomID, eml.InlineFiles, cfg.NoThreads(), threadID)
 	}

email/email.go

@@ -132,8 +132,15 @@ func (e *Email) contentHeader(threadID id.EventID, text *strings.Builder, option
 		text.WriteString("\n\n")
 	}
 	if options.Subject && threadID == "" {
-		text.WriteString("# ")
-		text.WriteString(e.Subject)
+		if options.Threadify {
+			text.WriteString("**")
+			text.WriteString(e.Subject)
+			text.WriteString("**")
+		} else {
+			text.WriteString("# ")
+			text.WriteString(e.Subject)
+
+		}
 		text.WriteString("\n\n")
 	}
 }
@@ -144,10 +151,12 @@ func (e *Email) Content(threadID id.EventID, options *ContentOptions) *event.Con
 
 	e.contentHeader(threadID, &text, options)
 
-	if e.HTML != "" && options.HTML {
-		text.WriteString(format.HTMLToMarkdown(e.HTML))
-	} else {
-		text.WriteString(e.Text)
+	if threadID != "" || (threadID == "" && !options.Threadify) {
+		if e.HTML != "" && options.HTML {
+			text.WriteString(format.HTMLToMarkdown(e.HTML))
+		} else {
+			text.WriteString(e.Text)
+		}
 	}
 
 	parsed := format.RenderMarkdown(text.String(), true, true)
@@ -174,6 +183,28 @@ func (e *Email) Content(threadID id.EventID, options *ContentOptions) *event.Con
 	return &content
 }
 
+// ContentBody converts the email object to a Matrix event content that contains email body only
+// NOTE: returns nil if threadify is disabled
+func (e *Email) ContentBody(threadID id.EventID, options *ContentOptions) *event.Content {
+	if !options.Threadify {
+		return nil
+	}
+	var text string
+	if e.HTML != "" && options.HTML {
+		text = format.HTMLToMarkdown(e.HTML)
+	} else {
+		text = e.Text
+	}
+
+	parsed := format.RenderMarkdown(text, true, true)
+	parsed.RelatesTo = linkpearl.RelatesTo(threadID, !options.Threads)
+
+	content := event.Content{
+		Parsed: &parsed,
+	}
+	return &content
+}
+
 // Compose converts the email object to a string (to be used for delivery via SMTP) and possibly DKIM-signs it
 func (e *Email) Compose(privkey string) string {
 	textSize := len(e.Text)

email/options.go

@@ -18,6 +18,7 @@ type ContentOptions struct {
 	Subject   bool
 	HTML      bool
 	Threads   bool
+	Threadify bool
 
 	// Keys
 	MessageIDKey  string