End to bridge encryption implementation

So far this is passing my basic tests, but could use some testing from people
that are much more familiar with how this is supposed to work.

Refs #27

bridge/commands.go

@@ -3,6 +3,7 @@ package bridge
 import (
 	"context"
 	"fmt"
+	"time"
 
 	"github.com/alecthomas/kong"
 
@@ -33,11 +34,17 @@ func (g *globals) reply(msg string) {
 	content.MsgType = event.MsgNotice
 	intent := g.bot
 
-	if g.portal != nil && g.portal.IsPrivateChat() {
+	if g.portal == nil {
+		g.handler.log.Errorfln("we don't have a portal for this command")
+
+		return
+	}
+
+	if g.portal.IsPrivateChat() {
 		intent = g.portal.MainIntent()
 	}
 
-	_, err := intent.SendMessageEvent(g.roomID, event.EventMessage, content)
+	_, err := g.portal.sendMatrixMessage(intent, event.EventMessage, &content, nil, time.Now().UTC().UnixMilli())
 	if err != nil {
 		g.handler.log.Warnfln("Failed to reply to command from %q: %v", g.user.MXID, err)
 	}