fix(matrix): Limit msg history to stop responses to old msgs

Signed-off-by: Richard Palethorpe <io@richiejp.com>

services/connectors/matrix.go

@@ -126,7 +126,8 @@ func (m *Matrix) handleRoomMessage(a *agent.Agent, evt *event.Event) {
 
 	// Skip if message does not mention the bot
 	mentioned := false
-	if evt.Content.AsMessage().Mentions != nil {
+	msg := evt.Content.AsMessage()
+	if msg.Mentions != nil {
 		mentioned = slices.Contains(evt.Content.AsMessage().Mentions.UserIDs, m.client.UserID)
 	}
 
@@ -159,7 +160,7 @@ func (m *Matrix) handleRoomMessage(a *agent.Agent, evt *event.Event) {
 		agentOptions = append(agentOptions, types.WithConversationHistory(currentConv))
 
 		// Add room to metadata for tracking
-		metadata := map[string]interface{}{
+		metadata := map[string]any{
 			"room": evt.RoomID.String(),
 		}
 		agentOptions = append(agentOptions, types.WithMetadata(metadata))
@@ -214,7 +215,6 @@ func (m *Matrix) handleRoomMessage(a *agent.Agent, evt *event.Event) {
 }
 
 func (m *Matrix) Start(a *agent.Agent) {
-	// Create Matrix client
 	client, err := mautrix.NewClient(m.homeserverURL, id.UserID(m.userID), m.accessToken)
 	if err != nil {
 		xlog.Error(fmt.Sprintf("Error creating Matrix client: %v", err))
@@ -223,7 +223,6 @@ func (m *Matrix) Start(a *agent.Agent) {
 	xlog.Info("Matrix client created")
 	m.client = client
 
-	// Set up event handler
 	syncer := client.Syncer.(*mautrix.DefaultSyncer)
 	syncer.OnEventType(event.EventMessage, func(ctx context.Context, evt *event.Event) {
 		xlog.Info("Received message", evt.Content.AsMessage().Body)
@@ -245,7 +244,15 @@ func (m *Matrix) Start(a *agent.Agent) {
 		//m.handleRoomMessage(a, evt)
 	})
 
-	// Start syncing
+	// This prevents the agent from picking up a backlog of messages and swamping the chat with responses.
+	syncer.FilterJSON = &mautrix.Filter{
+		Room: mautrix.RoomFilter{
+			Timeline: mautrix.FilterPart{
+				Limit: 1,
+			},
+		},
+	}
+
 	go func() {
 		for {
 			select {
@@ -271,29 +278,34 @@ func MatrixConfigMeta() []config.Field {
 		{
 			Name:     "homeserverURL",
 			Label:    "Homeserver URL",
+			HelpText: "e.g. http://host.docker.internal:8008",
 			Type:     config.FieldTypeText,
 			Required: true,
 		},
 		{
 			Name:     "userID",
 			Label:    "User ID",
+			HelpText: "e.g. @bot:host",
 			Type:     config.FieldTypeText,
 			Required: true,
 		},
 		{
 			Name:     "accessToken",
 			Label:    "Access Token",
+			HelpText: "Token obtained from _matrix/client/v3/login",
 			Type:     config.FieldTypeText,
 			Required: true,
 		},
 		{
 			Name:     "roomID",
-			Label: "Room ID",
+			Label:    "Internal Room ID",
+			HelpText: "The autogenerated unique identifier for a room",
 			Type:     config.FieldTypeText,
 		},
 		{
 			Name:     "roomMode",
 			Label:    "Room Mode",
+			HelpText: "Respond to all messages in the specified room",
 			Type:     config.FieldTypeCheckbox,
 		},
 	}