newsletter: parse ID, type and timestamp for incoming messages (#742)

notification.go

@@ -272,8 +272,12 @@ func (cli *Client) parseNewsletterMessages(node *waBinary.Node) []*types.Newslet
 		if child.Tag != "message" {
 			continue
 		}
+		ag := child.AttrGetter()
 		msg := types.NewsletterMessage{
-			MessageServerID: child.AttrGetter().Int("server_id"),
+			MessageServerID: ag.Int("server_id"),
+			MessageID:       ag.String("id"),
+			Type:            ag.String("type"),
+			Timestamp:       ag.UnixTime("t"),
 			ViewsCount:      0,
 			ReactionCounts:  nil,
 		}

types/newsletter.go

@@ -10,6 +10,7 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
+	"time"
 
 	"go.mau.fi/util/jsontime"
 
@@ -148,6 +149,9 @@ type NewsletterText struct {
 
 type NewsletterMessage struct {
 	MessageServerID MessageServerID
+	MessageID       MessageID
+	Type            string
+	Timestamp       time.Time
 	ViewsCount      int
 	ReactionCounts  map[string]int