feat: implement OnSharedChannelsSyncMsg hook for bidirectional sync

- Add PublishMessage method to BridgeManager interface and implementation
- Implement OnSharedChannelsSyncMsg hook to process Mattermost shared channel sync messages
- Add processSyncPost helper to convert Mattermost posts to bridge messages
- Route sync messages from Mattermost shared channels to XMPP bridge via message bus
- Handle user resolution with fallback to API calls for missing users
- Add comprehensive logging and error handling for sync operations
- Support routing of text messages from shared channels to XMPP rooms

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

go.mod

@@ -102,6 +102,7 @@ require (
 	github.com/hashicorp/yamux v0.1.2 // indirect
 	github.com/hexops/gotextdiff v1.0.3 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/jellydator/ttlcache/v3 v3.4.0 // indirect
 	github.com/jgautheron/goconst v1.7.1 // indirect
 	github.com/jingyugao/rowserrcheck v1.1.1 // indirect
 	github.com/jirfag/go-printf-func-name v0.0.0-20200119135958-7558a9eaa5af // indirect
@@ -210,7 +211,7 @@ require (
 	golang.org/x/exp/typeparams v0.0.0-20240314144324-c7f7c6466f7f // indirect
 	golang.org/x/mod v0.22.0 // indirect
 	golang.org/x/net v0.34.0 // indirect
-	golang.org/x/sync v0.10.0 // indirect
+	golang.org/x/sync v0.15.0 // indirect
 	golang.org/x/sys v0.29.0 // indirect
 	golang.org/x/term v0.28.0 // indirect
 	golang.org/x/text v0.21.0 // indirect

go.sum

@@ -366,6 +366,8 @@ github.com/ianlancetaylor/demangle v0.0.0-20181102032728-5e5cf60278f6/go.mod h1:
 github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
 github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
 github.com/jellevandenhooff/dkim v0.0.0-20150330215556-f50fe3d243e1/go.mod h1:E0B/fFc00Y+Rasa88328GlI/XbtyysCtTHZS8h7IrBU=
+github.com/jellydator/ttlcache/v3 v3.4.0 h1:YS4P125qQS0tNhtL6aeYkheEaB/m8HCqdMMP4mnWdTY=
+github.com/jellydator/ttlcache/v3 v3.4.0/go.mod h1:Hw9EgjymziQD3yGsQdf1FqFdpp7YjFMd4Srg5EJlgD4=
 github.com/jgautheron/goconst v1.7.1 h1:VpdAG7Ca7yvvJk5n8dMwQhfEZJh95kl/Hl9S1OI5Jkk=
 github.com/jgautheron/goconst v1.7.1/go.mod h1:aAosetZ5zaeC/2EfMeRswtxUFBpe2Hr7HzkgX4fanO4=
 github.com/jhump/protoreflect v1.15.1 h1:HUMERORf3I3ZdX05WaQ6MIpd/NJ434hTp5YiKgfCL6c=
@@ -867,6 +869,8 @@ golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.10.0 h1:3NQrjDixjgGwUOCaF8w2+VYHv0Ve/vGYSbdkTa98gmQ=
 golang.org/x/sync v0.10.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sync v0.15.0 h1:KWH3jNZsfyT6xfAfKiz6MRNmd46ByHDYaZ7KSkCtdW8=
+golang.org/x/sync v0.15.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=

server/bridge/manager.go

@@ -1,9 +1,11 @@
 package bridge
 
 import (
+	"context"
 	"fmt"
 	"sync"
 
+	"github.com/mattermost/mattermost-plugin-bridge-xmpp/server/config"
 	"github.com/mattermost/mattermost-plugin-bridge-xmpp/server/logger"
 	"github.com/mattermost/mattermost-plugin-bridge-xmpp/server/model"
 	mmModel "github.com/mattermost/mattermost/server/public/model"
@@ -12,11 +14,15 @@ import (
 
 // BridgeManager manages multiple bridge instances
 type BridgeManager struct {
-	bridges  map[string]model.Bridge
-	mu       sync.RWMutex
-	logger   logger.Logger
-	api      plugin.API
-	remoteID string
+	bridges       map[string]model.Bridge
+	mu            sync.RWMutex
+	logger        logger.Logger
+	api           plugin.API
+	remoteID      string
+	messageBus    model.MessageBus
+	routingCtx    context.Context
+	routingCancel context.CancelFunc
+	routingWg     sync.WaitGroup
 }
 
 // NewBridgeManager creates a new bridge manager
@@ -28,11 +34,16 @@ func NewBridgeManager(logger logger.Logger, api plugin.API, remoteID string) mod
 		panic("plugin API cannot be nil")
 	}
 
+	ctx, cancel := context.WithCancel(context.Background())
+
 	return &BridgeManager{
-		bridges:  make(map[string]model.Bridge),
-		logger:   logger,
-		api:      api,
-		remoteID: remoteID,
+		bridges:       make(map[string]model.Bridge),
+		logger:        logger,
+		api:           api,
+		remoteID:      remoteID,
+		messageBus:    NewMessageBus(logger),
+		routingCtx:    ctx,
+		routingCancel: cancel,
 	}
 }
 
@@ -55,6 +66,9 @@ func (m *BridgeManager) RegisterBridge(name string, bridge model.Bridge) error {
 	m.bridges[name] = bridge
 	m.logger.LogInfo("Bridge registered", "name", name)
 
+	// Subscribe bridge to message bus
+	go m.startBridgeMessageHandler(name, bridge)
+
 	return nil
 }
 
@@ -149,6 +163,20 @@ func (m *BridgeManager) ListBridges() []string {
 	return bridges
 }
 
+// Start starts the bridge manager and message routing system
+func (m *BridgeManager) Start() error {
+	m.logger.LogInfo("Starting bridge manager")
+
+	// Start the message routing system
+	if err := m.StartMessageRouting(); err != nil {
+		m.logger.LogError("Failed to start message routing", "error", err)
+		return fmt.Errorf("failed to start message routing: %w", err)
+	}
+
+	m.logger.LogInfo("Bridge manager started successfully")
+	return nil
+}
+
 // HasBridge checks if a bridge with the given name is registered
 func (m *BridgeManager) HasBridge(name string) bool {
 	m.mu.RLock()
@@ -173,6 +201,11 @@ func (m *BridgeManager) Shutdown() error {
 
 	m.logger.LogInfo("Shutting down bridge manager", "bridge_count", len(m.bridges))
 
+	// Stop message routing first
+	if err := m.StopMessageRouting(); err != nil {
+		m.logger.LogError("Failed to stop message routing during shutdown", "error", err)
+	}
+
 	var errors []error
 	for name, bridge := range m.bridges {
 		if bridge.IsConnected() {
@@ -196,7 +229,7 @@ func (m *BridgeManager) Shutdown() error {
 }
 
 // OnPluginConfigurationChange propagates configuration changes to all registered bridges
-func (m *BridgeManager) OnPluginConfigurationChange(config any) error {
+func (m *BridgeManager) OnPluginConfigurationChange(config *config.Configuration) error {
 	m.mu.RLock()
 	defer m.mu.RUnlock()
 
@@ -231,7 +264,7 @@ func (m *BridgeManager) CreateChannelMapping(req model.CreateChannelMappingReque
 		return fmt.Errorf("invalid mapping request: %w", err)
 	}
 
-	m.logger.LogDebug("Creating channel mapping", "channel_id", req.ChannelID, "bridge_name", req.BridgeName, "bridge_room_id", req.BridgeRoomID, "user_id", req.UserID, "team_id", req.TeamID)
+	m.logger.LogDebug("Creating channel mapping", "channel_id", req.ChannelID, "bridge_name", req.BridgeName, "bridge_channel_id", req.BridgeChannelID, "user_id", req.UserID, "team_id", req.TeamID)
 
 	// Get the specific bridge
 	bridge, err := m.GetBridge(req.BridgeName)
@@ -246,41 +279,41 @@ func (m *BridgeManager) CreateChannelMapping(req model.CreateChannelMappingReque
 	}
 
 	// NEW: Check if room already mapped to another channel
-	existingChannelID, err := bridge.GetRoomMapping(req.BridgeRoomID)
+	existingChannelID, err := bridge.GetChannelMapping(req.BridgeChannelID)
 	if err != nil {
-		m.logger.LogError("Failed to check room mapping", "bridge_room_id", req.BridgeRoomID, "error", err)
-		return fmt.Errorf("failed to check room mapping: %w", err)
+		m.logger.LogError("Failed to check channel mapping", "bridge_channel_id", req.BridgeChannelID, "error", err)
+		return fmt.Errorf("failed to check channel mapping: %w", err)
 	}
 	if existingChannelID != "" {
-		m.logger.LogWarn("Room already mapped to another channel",
-			"bridge_room_id", req.BridgeRoomID,
+		m.logger.LogWarn("Channel already mapped to another channel",
+			"bridge_channel_id", req.BridgeChannelID,
 			"existing_channel_id", existingChannelID,
 			"requested_channel_id", req.ChannelID)
-		return fmt.Errorf("room '%s' is already mapped to channel '%s'", req.BridgeRoomID, existingChannelID)
+		return fmt.Errorf("channel '%s' is already mapped to channel '%s'", req.BridgeChannelID, existingChannelID)
 	}
 
 	// NEW: Check if room exists on target bridge
-	roomExists, err := bridge.RoomExists(req.BridgeRoomID)
+	channelExists, err := bridge.ChannelMappingExists(req.BridgeChannelID)
 	if err != nil {
-		m.logger.LogError("Failed to check room existence", "bridge_room_id", req.BridgeRoomID, "error", err)
-		return fmt.Errorf("failed to check room existence: %w", err)
+		m.logger.LogError("Failed to check channel existence", "bridge_channel_id", req.BridgeChannelID, "error", err)
+		return fmt.Errorf("failed to check channel existence: %w", err)
 	}
-	if !roomExists {
-		m.logger.LogWarn("Room does not exist on bridge",
-			"bridge_room_id", req.BridgeRoomID,
+	if !channelExists {
+		m.logger.LogWarn("Channel does not exist on bridge",
+			"bridge_channel_id", req.BridgeChannelID,
 			"bridge_name", req.BridgeName)
-		return fmt.Errorf("room '%s' does not exist on %s bridge", req.BridgeRoomID, req.BridgeName)
+		return fmt.Errorf("channel '%s' does not exist on %s bridge", req.BridgeChannelID, req.BridgeName)
 	}
 
-	m.logger.LogDebug("Room validation passed",
-		"bridge_room_id", req.BridgeRoomID,
+	m.logger.LogDebug("Channel validation passed",
+		"bridge_channel_id", req.BridgeChannelID,
 		"bridge_name", req.BridgeName,
-		"room_exists", roomExists,
+		"channel_exists", channelExists,
 		"already_mapped", false)
 
 	// Create the channel mapping on the receiving bridge
-	if err = bridge.CreateChannelMapping(req.ChannelID, req.BridgeRoomID); err != nil {
-		m.logger.LogError("Failed to create channel mapping", "channel_id", req.ChannelID, "bridge_name", req.BridgeName, "bridge_room_id", req.BridgeRoomID, "error", err)
+	if err = bridge.CreateChannelMapping(req.ChannelID, req.BridgeChannelID); err != nil {
+		m.logger.LogError("Failed to create channel mapping", "channel_id", req.ChannelID, "bridge_name", req.BridgeName, "bridge_channel_id", req.BridgeChannelID, "error", err)
 		return fmt.Errorf("failed to create channel mapping for bridge '%s': %w", req.BridgeName, err)
 	}
 
@@ -291,19 +324,19 @@ func (m *BridgeManager) CreateChannelMapping(req model.CreateChannelMappingReque
 	}
 
 	// Create the channel mapping in the Mattermost bridge
-	if err = mattermostBridge.CreateChannelMapping(req.ChannelID, req.BridgeRoomID); err != nil {
-		m.logger.LogError("Failed to create channel mapping in Mattermost bridge", "channel_id", req.ChannelID, "bridge_name", req.BridgeName, "bridge_room_id", req.BridgeRoomID, "error", err)
+	if err = mattermostBridge.CreateChannelMapping(req.ChannelID, req.BridgeChannelID); err != nil {
+		m.logger.LogError("Failed to create channel mapping in Mattermost bridge", "channel_id", req.ChannelID, "bridge_name", req.BridgeName, "bridge_channel_id", req.BridgeChannelID, "error", err)
 		return fmt.Errorf("failed to create channel mapping in Mattermost bridge: %w", err)
 	}
 
 	// Share the channel using Mattermost's shared channels API
 	if err = m.shareChannel(req); err != nil {
-		m.logger.LogError("Failed to share channel", "channel_id", req.ChannelID, "bridge_room_id", req.BridgeRoomID, "error", err)
+		m.logger.LogError("Failed to share channel", "channel_id", req.ChannelID, "bridge_channel_id", req.BridgeChannelID, "error", err)
 		// Don't fail the entire operation if sharing fails, but log the error
 		m.logger.LogWarn("Channel mapping created but sharing failed - channel may not sync properly")
 	}
 
-	m.logger.LogInfo("Successfully created channel mapping", "channel_id", req.ChannelID, "bridge_name", req.BridgeName, "bridge_room_id", req.BridgeRoomID)
+	m.logger.LogInfo("Successfully created channel mapping", "channel_id", req.ChannelID, "bridge_name", req.BridgeName, "bridge_channel_id", req.BridgeChannelID)
 	return nil
 }
 
@@ -370,9 +403,9 @@ func (m *BridgeManager) shareChannel(req model.CreateChannelMappingRequest) erro
 		TeamId:           req.TeamID,
 		Home:             true,
 		ReadOnly:         false,
-		ShareName:        model.SanitizeShareName(fmt.Sprintf("bridge-%s", req.BridgeRoomID)),
-		ShareDisplayName: fmt.Sprintf("Bridge: %s", req.BridgeRoomID),
-		SharePurpose:     fmt.Sprintf("Shared channel bridged to %s", req.BridgeRoomID),
+		ShareName:        model.SanitizeShareName(fmt.Sprintf("bridge-%s", req.BridgeChannelID)),
+		ShareDisplayName: fmt.Sprintf("Bridge: %s", req.BridgeChannelID),
+		SharePurpose:     fmt.Sprintf("Shared channel bridged to %s", req.BridgeChannelID),
 		ShareHeader:      "test header",
 		CreatorId:        req.UserID,
 		RemoteId:         m.remoteID,
@@ -404,3 +437,127 @@ func (m *BridgeManager) unshareChannel(channelID string) error {
 
 	return nil
 }
+
+// startBridgeMessageHandler starts message handling for a specific bridge
+func (m *BridgeManager) startBridgeMessageHandler(bridgeName string, bridge model.Bridge) {
+	m.logger.LogDebug("Starting message handler for bridge", "bridge", bridgeName)
+
+	// Subscribe to message bus
+	messageChannel := m.messageBus.Subscribe(bridgeName)
+
+	// Start message routing goroutine
+	m.routingWg.Add(1)
+	go func() {
+		defer m.routingWg.Done()
+		defer m.logger.LogDebug("Message handler stopped for bridge", "bridge", bridgeName)
+
+		for {
+			select {
+			case msg, ok := <-messageChannel:
+				if !ok {
+					m.logger.LogDebug("Message channel closed for bridge", "bridge", bridgeName)
+					return
+				}
+
+				if err := m.handleBridgeMessage(bridgeName, bridge, msg); err != nil {
+					m.logger.LogError("Failed to handle message for bridge",
+						"bridge", bridgeName,
+						"source_bridge", msg.SourceBridge,
+						"error", err)
+				}
+
+			case <-m.routingCtx.Done():
+				m.logger.LogDebug("Context cancelled, stopping message handler", "bridge", bridgeName)
+				return
+			}
+		}
+	}()
+
+	// Listen to bridge's outgoing messages
+	m.routingWg.Add(1)
+	go func() {
+		defer m.routingWg.Done()
+		defer m.logger.LogDebug("Bridge message listener stopped", "bridge", bridgeName)
+
+		bridgeMessageChannel := bridge.GetMessageChannel()
+		for {
+			select {
+			case msg, ok := <-bridgeMessageChannel:
+				if !ok {
+					m.logger.LogDebug("Bridge message channel closed", "bridge", bridgeName)
+					return
+				}
+
+				if err := m.messageBus.Publish(msg); err != nil {
+					m.logger.LogError("Failed to publish message from bridge",
+						"bridge", bridgeName,
+						"direction", msg.Direction,
+						"error", err)
+				}
+
+			case <-m.routingCtx.Done():
+				m.logger.LogDebug("Context cancelled, stopping bridge listener", "bridge", bridgeName)
+				return
+			}
+		}
+	}()
+}
+
+// handleBridgeMessage processes an incoming message for a specific bridge
+func (m *BridgeManager) handleBridgeMessage(bridgeName string, bridge model.Bridge, msg *model.DirectionalMessage) error {
+	m.logger.LogDebug("Handling message for bridge",
+		"target_bridge", bridgeName,
+		"source_bridge", msg.SourceBridge,
+		"direction", msg.Direction,
+		"channel_id", msg.SourceChannelID)
+
+	// Get the bridge's message handler
+	handler := bridge.GetMessageHandler()
+	if handler == nil {
+		return fmt.Errorf("bridge %s does not have a message handler", bridgeName)
+	}
+
+	// Check if the handler can process this message
+	if !handler.CanHandleMessage(msg.BridgeMessage) {
+		m.logger.LogDebug("Bridge cannot handle message",
+			"bridge", bridgeName,
+			"message_type", msg.MessageType)
+		return nil // Not an error, just skip
+	}
+
+	// Process the message
+	return handler.ProcessMessage(msg)
+}
+
+// StartMessageRouting starts the message bus and routing system
+func (m *BridgeManager) StartMessageRouting() error {
+	m.logger.LogInfo("Starting message routing system")
+	return m.messageBus.Start()
+}
+
+// StopMessageRouting stops the message bus and routing system
+func (m *BridgeManager) StopMessageRouting() error {
+	m.logger.LogInfo("Stopping message routing system")
+
+	// Cancel routing context
+	if m.routingCancel != nil {
+		m.routingCancel()
+	}
+
+	// Wait for all routing goroutines to finish
+	m.routingWg.Wait()
+
+	// Stop the message bus
+	return m.messageBus.Stop()
+}
+
+// PublishMessage publishes a message to the message bus for routing to target bridges
+func (m *BridgeManager) PublishMessage(msg *model.DirectionalMessage) error {
+	m.logger.LogDebug("Publishing message to message bus",
+		"source_bridge", msg.SourceBridge,
+		"direction", msg.Direction,
+		"target_bridges", msg.TargetBridges,
+		"message_id", msg.MessageID)
+
+	return m.messageBus.Publish(msg)
+}

server/bridge/mattermost/bridge.go

@@ -14,12 +14,24 @@ import (
 	"github.com/mattermost/mattermost/server/public/plugin"
 )
 
+const (
+	// defaultMessageBufferSize is the buffer size for incoming message channels
+	defaultMessageBufferSize = 1000
+)
+
 // mattermostBridge handles syncing messages between Mattermost instances
 type mattermostBridge struct {
 	logger      logger.Logger
 	api         plugin.API
 	kvstore     kvstore.KVStore
 	userManager pluginModel.BridgeUserManager
+	botUserID   string // Bot user ID for posting messages
+	remoteID    string // Remote ID for shared channels
+
+	// Message handling
+	messageHandler   *mattermostMessageHandler
+	userResolver     *mattermostUserResolver
+	incomingMessages chan *pluginModel.DirectionalMessage
 
 	// Connection management
 	connected atomic.Bool
@@ -36,27 +48,41 @@ type mattermostBridge struct {
 }
 
 // NewBridge creates a new Mattermost bridge
-func NewBridge(log logger.Logger, api plugin.API, kvstore kvstore.KVStore, cfg *config.Configuration) pluginModel.Bridge {
+func NewBridge(log logger.Logger, api plugin.API, kvstore kvstore.KVStore, cfg *config.Configuration, botUserID, remoteID string) pluginModel.Bridge {
 	ctx, cancel := context.WithCancel(context.Background())
-	bridge := &mattermostBridge{
-		logger:          log,
-		api:             api,
-		kvstore:         kvstore,
-		ctx:             ctx,
-		cancel:          cancel,
-		channelMappings: make(map[string]string),
-		config:          cfg,
-		userManager:     bridge.NewUserManager("mattermost", log),
+	b := &mattermostBridge{
+		logger:           log,
+		api:              api,
+		kvstore:          kvstore,
+		botUserID:        botUserID,
+		remoteID:         remoteID,
+		ctx:              ctx,
+		cancel:           cancel,
+		channelMappings:  make(map[string]string),
+		config:           cfg,
+		userManager:      bridge.NewUserManager("mattermost", log),
+		incomingMessages: make(chan *pluginModel.DirectionalMessage, defaultMessageBufferSize),
 	}
 
-	return bridge
+	// Initialize handlers after bridge is created
+	b.messageHandler = newMessageHandler(b)
+	b.userResolver = newUserResolver(b)
+
+	return b
+}
+
+// getConfiguration safely retrieves the current configuration
+func (b *mattermostBridge) getConfiguration() *config.Configuration {
+	b.configMu.RLock()
+	defer b.configMu.RUnlock()
+	return b.config
 }
 
 // UpdateConfiguration updates the bridge configuration
-func (b *mattermostBridge) UpdateConfiguration(newConfig any) error {
-	cfg, ok := newConfig.(*config.Configuration)
-	if !ok {
-		return fmt.Errorf("invalid configuration type")
+func (b *mattermostBridge) UpdateConfiguration(cfg *config.Configuration) error {
+	// Validate configuration using built-in validation
+	if err := cfg.IsValid(); err != nil {
+		return fmt.Errorf("invalid configuration: %w", err)
 	}
 
 	b.configMu.Lock()
@@ -282,8 +308,8 @@ func (b *mattermostBridge) DeleteChannelMapping(channelID string) error {
 	return nil
 }
 
-// RoomExists checks if a Mattermost channel exists on the server
-func (b *mattermostBridge) RoomExists(roomID string) (bool, error) {
+// ChannelMappingExists checks if a Mattermost channel exists on the server
+func (b *mattermostBridge) ChannelMappingExists(roomID string) (bool, error) {
 	if b.api == nil {
 		return false, fmt.Errorf("Mattermost API not initialized")
 	}
@@ -332,7 +358,47 @@ func (b *mattermostBridge) GetRoomMapping(roomID string) (string, error) {
 	return channelID, nil
 }
 
+// GetChannelMappingForBridge retrieves the Mattermost channel ID for a given room ID from a specific bridge
+func (b *mattermostBridge) GetChannelMappingForBridge(bridgeName, roomID string) (string, error) {
+	channelIDBytes, err := b.kvstore.Get(kvstore.BuildChannelMapKey(bridgeName, roomID))
+	if err != nil {
+		// No mapping found is not an error, just return empty string
+		b.logger.LogDebug("No channel mapping found for bridge room", "bridge_name", bridgeName, "room_id", roomID)
+		return "", nil
+	}
+
+	channelID := string(channelIDBytes)
+	b.logger.LogDebug("Found channel mapping for bridge room", "bridge_name", bridgeName, "room_id", roomID, "channel_id", channelID)
+
+	return channelID, nil
+}
+
 // GetUserManager returns the user manager for this bridge
 func (b *mattermostBridge) GetUserManager() pluginModel.BridgeUserManager {
 	return b.userManager
 }
+
+// GetMessageChannel returns the channel for incoming messages from Mattermost
+func (b *mattermostBridge) GetMessageChannel() <-chan *pluginModel.DirectionalMessage {
+	return b.incomingMessages
+}
+
+// SendMessage sends a message to a Mattermost channel
+func (b *mattermostBridge) SendMessage(msg *pluginModel.BridgeMessage) error {
+	return b.messageHandler.postMessageToMattermost(msg)
+}
+
+// GetMessageHandler returns the message handler for this bridge
+func (b *mattermostBridge) GetMessageHandler() pluginModel.MessageHandler {
+	return b.messageHandler
+}
+
+// GetUserResolver returns the user resolver for this bridge
+func (b *mattermostBridge) GetUserResolver() pluginModel.UserResolver {
+	return b.userResolver
+}
+
+// GetRemoteID returns the remote ID used for shared channels registration
+func (b *mattermostBridge) GetRemoteID() string {
+	return b.remoteID
+}

server/bridge/mattermost/message_handler.go

@@ -0,0 +1,208 @@
+package mattermost
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/mattermost/mattermost-plugin-bridge-xmpp/server/logger"
+	pluginModel "github.com/mattermost/mattermost-plugin-bridge-xmpp/server/model"
+	mmModel "github.com/mattermost/mattermost/server/public/model"
+)
+
+// mattermostMessageHandler handles incoming messages for the Mattermost bridge
+type mattermostMessageHandler struct {
+	bridge *mattermostBridge
+	logger logger.Logger
+}
+
+// newMessageHandler creates a new Mattermost message handler
+func newMessageHandler(bridge *mattermostBridge) *mattermostMessageHandler {
+	return &mattermostMessageHandler{
+		bridge: bridge,
+		logger: bridge.logger,
+	}
+}
+
+// ProcessMessage processes an incoming message for the Mattermost bridge
+func (h *mattermostMessageHandler) ProcessMessage(msg *pluginModel.DirectionalMessage) error {
+	h.logger.LogDebug("Processing message for Mattermost bridge",
+		"source_bridge", msg.SourceBridge,
+		"direction", msg.Direction,
+		"channel_id", msg.SourceChannelID)
+
+	// Skip messages that originated from Mattermost to prevent loops
+	if msg.SourceBridge == "mattermost" {
+		h.logger.LogDebug("Skipping Mattermost-originated message to prevent loop")
+		return nil
+	}
+
+	// For incoming messages to Mattermost, we post them to Mattermost channels
+	if msg.Direction == pluginModel.DirectionIncoming {
+		return h.postMessageToMattermost(msg.BridgeMessage)
+	}
+
+	h.logger.LogDebug("Ignoring outgoing message for Mattermost bridge")
+	return nil
+}
+
+// CanHandleMessage determines if this handler can process the message
+func (h *mattermostMessageHandler) CanHandleMessage(msg *pluginModel.BridgeMessage) bool {
+	// Mattermost bridge can handle text messages that didn't originate from Mattermost
+	return msg.MessageType == "text" && msg.SourceBridge != "mattermost"
+}
+
+// GetSupportedMessageTypes returns the message types this handler supports
+func (h *mattermostMessageHandler) GetSupportedMessageTypes() []string {
+	return []string{"text"}
+}
+
+// postMessageToMattermost posts a message to a Mattermost channel
+func (h *mattermostMessageHandler) postMessageToMattermost(msg *pluginModel.BridgeMessage) error {
+	if h.bridge.api == nil {
+		return fmt.Errorf("Mattermost API not initialized")
+	}
+
+	// Get the Mattermost channel ID from the channel mapping using the source bridge name
+	channelID, err := h.bridge.GetChannelMappingForBridge(msg.SourceBridge, msg.SourceChannelID)
+	if err != nil {
+		return fmt.Errorf("failed to get channel mapping: %w", err)
+	}
+	if channelID == "" {
+		// Check if the source channel ID is already a Mattermost channel ID
+		channelID = msg.SourceChannelID
+	}
+
+	// Verify the channel exists
+	channel, appErr := h.bridge.api.GetChannel(channelID)
+	if appErr != nil {
+		return fmt.Errorf("failed to get channel %s: %w", channelID, appErr)
+	}
+	if channel == nil {
+		return fmt.Errorf("channel %s not found", channelID)
+	}
+
+	// Format the message content
+	content := h.formatMessageContent(msg)
+
+	// Create the post
+	post := &mmModel.Post{
+		ChannelId: channelID,
+		UserId:    h.bridge.botUserID,
+		Message:   content,
+		Type:      mmModel.PostTypeDefault,
+		Props: map[string]interface{}{
+			"from_bridge":       msg.SourceBridge,
+			"bridge_user_id":    msg.SourceUserID,
+			"bridge_user_name":  msg.SourceUserName,
+			"bridge_message_id": msg.MessageID,
+			"bridge_timestamp":  msg.Timestamp.Unix(),
+		},
+	}
+
+	// Add thread ID if present
+	if msg.ThreadID != "" {
+		post.RootId = msg.ThreadID
+	}
+
+	// Post the message as the plugin bot
+	createdPost, appErr := h.bridge.api.CreatePost(post)
+	if appErr != nil {
+		return fmt.Errorf("failed to create post in channel %s: %w", channelID, appErr)
+	}
+
+	h.logger.LogDebug("Message posted to Mattermost channel",
+		"channel_id", channelID,
+		"post_id", createdPost.Id,
+		"source_bridge", msg.SourceBridge,
+		"content_length", len(content))
+
+	return nil
+}
+
+// formatMessageContent formats the message content for Mattermost
+func (h *mattermostMessageHandler) formatMessageContent(msg *pluginModel.BridgeMessage) string {
+	// For messages from other bridges, prefix with the bridge info and user name
+	if msg.SourceUserName != "" {
+		bridgeIcon := h.getBridgeIcon(msg.SourceBridge)
+		return fmt.Sprintf("%s **%s**: %s", bridgeIcon, msg.SourceUserName, msg.Content)
+	}
+	return msg.Content
+}
+
+// getBridgeIcon returns an icon/emoji for the source bridge
+func (h *mattermostMessageHandler) getBridgeIcon(bridgeType string) string {
+	switch bridgeType {
+	case "xmpp":
+		return ":speech_balloon:" // Chat bubble emoji for XMPP
+	case "slack":
+		return ":slack:" // Slack emoji if available
+	case "discord":
+		return ":discord:" // Discord emoji if available
+	default:
+		return ":bridge_at_night:" // Generic bridge emoji
+	}
+}
+
+// mattermostUserResolver handles user resolution for the Mattermost bridge
+type mattermostUserResolver struct {
+	bridge *mattermostBridge
+	logger logger.Logger
+}
+
+// newUserResolver creates a new Mattermost user resolver
+func newUserResolver(bridge *mattermostBridge) *mattermostUserResolver {
+	return &mattermostUserResolver{
+		bridge: bridge,
+		logger: bridge.logger,
+	}
+}
+
+// ResolveUser converts an external user ID to an ExternalUser
+func (r *mattermostUserResolver) ResolveUser(externalUserID string) (*pluginModel.ExternalUser, error) {
+	r.logger.LogDebug("Resolving Mattermost user", "user_id", externalUserID)
+
+	// For Mattermost, the external user ID is the Mattermost user ID
+	user, appErr := r.bridge.api.GetUser(externalUserID)
+	if appErr != nil {
+		return nil, fmt.Errorf("failed to get Mattermost user: %w", appErr)
+	}
+
+	if user == nil {
+		return nil, fmt.Errorf("Mattermost user not found: %s", externalUserID)
+	}
+
+	return &pluginModel.ExternalUser{
+		BridgeType:       "mattermost",
+		ExternalUserID:   externalUserID,
+		DisplayName:      r.GetDisplayName(externalUserID),
+		MattermostUserID: externalUserID, // Same as external ID for Mattermost
+	}, nil
+}
+
+// FormatUserMention formats a user mention for Markdown content
+func (r *mattermostUserResolver) FormatUserMention(user *pluginModel.ExternalUser) string {
+	// For Mattermost, use the standard @username format
+	return fmt.Sprintf("@%s", user.DisplayName)
+}
+
+// GetDisplayName extracts display name from external user ID
+func (r *mattermostUserResolver) GetDisplayName(externalUserID string) string {
+	// Try to get the actual username from Mattermost API
+	user, appErr := r.bridge.api.GetUser(externalUserID)
+	if appErr != nil || user == nil {
+		r.logger.LogWarn("Failed to get user for display name", "user_id", externalUserID)
+		return "Unknown User"
+	}
+
+	// Prefer username, fallback to first name + last name, then to ID
+	if user.Username != "" {
+		return user.Username
+	}
+
+	fullName := strings.TrimSpace(user.FirstName + " " + user.LastName)
+	if fullName != "" {
+		return fullName
+	}
+
+	return user.Id[:8] // Show first 8 chars of ID as fallback
+}

server/bridge/messagebus.go

@@ -0,0 +1,244 @@
+package bridge
+
+import (
+	"context"
+	"fmt"
+	"sync"
+	"time"
+
+	"github.com/mattermost/mattermost-plugin-bridge-xmpp/server/logger"
+	"github.com/mattermost/mattermost-plugin-bridge-xmpp/server/model"
+)
+
+const (
+	// DefaultMessageBufferSize is the default buffer size for message channels
+	DefaultMessageBufferSize = 1000
+
+	// MessageDeliveryTimeout is the maximum time to wait for message delivery
+	MessageDeliveryTimeout = 5 * time.Second
+)
+
+// messageBus implements the MessageBus interface
+type messageBus struct {
+	// Core messaging
+	incomingMessages chan *model.DirectionalMessage
+	subscribers      map[string]chan *model.DirectionalMessage
+	subscribersMu    sync.RWMutex
+
+	// Lifecycle management
+	ctx     context.Context
+	cancel  context.CancelFunc
+	logger  logger.Logger
+	wg      sync.WaitGroup
+	started bool
+	startMu sync.Mutex
+}
+
+// NewMessageBus creates a new message bus instance
+func NewMessageBus(logger logger.Logger) model.MessageBus {
+	ctx, cancel := context.WithCancel(context.Background())
+
+	return &messageBus{
+		incomingMessages: make(chan *model.DirectionalMessage, DefaultMessageBufferSize),
+		subscribers:      make(map[string]chan *model.DirectionalMessage),
+		ctx:              ctx,
+		cancel:           cancel,
+		logger:           logger,
+	}
+}
+
+// Subscribe returns a channel that receives messages for the specified bridge
+func (mb *messageBus) Subscribe(bridgeName string) <-chan *model.DirectionalMessage {
+	mb.subscribersMu.Lock()
+	defer mb.subscribersMu.Unlock()
+
+	// Create a buffered channel for this subscriber
+	ch := make(chan *model.DirectionalMessage, DefaultMessageBufferSize)
+	mb.subscribers[bridgeName] = ch
+
+	mb.logger.LogDebug("Bridge subscribed to message bus", "bridge", bridgeName)
+	return ch
+}
+
+// Publish sends a message to the message bus for routing
+func (mb *messageBus) Publish(msg *model.DirectionalMessage) error {
+	if msg == nil {
+		return fmt.Errorf("message cannot be nil")
+	}
+
+	if msg.BridgeMessage == nil {
+		return fmt.Errorf("bridge message cannot be nil")
+	}
+
+	select {
+	case mb.incomingMessages <- msg:
+		mb.logger.LogDebug("Message published to bus",
+			"source_bridge", msg.SourceBridge,
+			"direction", msg.Direction,
+			"channel_id", msg.SourceChannelID)
+		return nil
+	case <-time.After(MessageDeliveryTimeout):
+		mb.logger.LogWarn("Message delivery timeout",
+			"source_bridge", msg.SourceBridge,
+			"channel_id", msg.SourceChannelID)
+		return fmt.Errorf("message delivery timeout")
+	case <-mb.ctx.Done():
+		return fmt.Errorf("message bus is shutting down")
+	}
+}
+
+// Start begins message routing
+func (mb *messageBus) Start() error {
+	mb.startMu.Lock()
+	defer mb.startMu.Unlock()
+
+	if mb.started {
+		return fmt.Errorf("message bus is already started")
+	}
+
+	mb.logger.LogInfo("Starting message bus")
+
+	// Start the message routing goroutine
+	mb.wg.Add(1)
+	go mb.routeMessages()
+
+	mb.started = true
+	mb.logger.LogInfo("Message bus started successfully")
+	return nil
+}
+
+// Stop ends message routing and cleans up resources
+func (mb *messageBus) Stop() error {
+	mb.startMu.Lock()
+	defer mb.startMu.Unlock()
+
+	if !mb.started {
+		return nil // Already stopped
+	}
+
+	mb.logger.LogInfo("Stopping message bus")
+
+	// Cancel context to signal shutdown
+	mb.cancel()
+
+	// Wait for routing goroutine to finish
+	mb.wg.Wait()
+
+	// Close all subscriber channels
+	mb.subscribersMu.Lock()
+	for bridgeName, ch := range mb.subscribers {
+		close(ch)
+		mb.logger.LogDebug("Closed subscriber channel", "bridge", bridgeName)
+	}
+	mb.subscribers = make(map[string]chan *model.DirectionalMessage)
+	mb.subscribersMu.Unlock()
+
+	// Close incoming messages channel
+	close(mb.incomingMessages)
+
+	mb.started = false
+	mb.logger.LogInfo("Message bus stopped successfully")
+	return nil
+}
+
+// routeMessages handles the main message routing loop
+func (mb *messageBus) routeMessages() {
+	defer mb.wg.Done()
+
+	mb.logger.LogDebug("Message routing started")
+
+	for {
+		select {
+		case msg, ok := <-mb.incomingMessages:
+			if !ok {
+				mb.logger.LogDebug("Incoming messages channel closed, stopping routing")
+				return
+			}
+
+			if err := mb.routeMessage(msg); err != nil {
+				mb.logger.LogError("Failed to route message",
+					"source_bridge", msg.SourceBridge,
+					"direction", msg.Direction,
+					"error", err)
+			}
+
+		case <-mb.ctx.Done():
+			mb.logger.LogDebug("Context cancelled, stopping message routing")
+			return
+		}
+	}
+}
+
+// routeMessage routes a single message to appropriate subscribers
+func (mb *messageBus) routeMessage(msg *model.DirectionalMessage) error {
+	mb.subscribersMu.RLock()
+	defer mb.subscribersMu.RUnlock()
+
+	routedCount := 0
+
+	// Route to specific target bridges if specified
+	if len(msg.TargetBridges) > 0 {
+		for _, targetBridge := range msg.TargetBridges {
+			if ch, exists := mb.subscribers[targetBridge]; exists {
+				if mb.deliverMessage(ch, msg, targetBridge) {
+					routedCount++
+				}
+			} else {
+				mb.logger.LogWarn("Target bridge not subscribed",
+					"target_bridge", targetBridge,
+					"source_bridge", msg.SourceBridge)
+			}
+		}
+	} else {
+		// Route to all subscribers except the source bridge
+		for bridgeName, ch := range mb.subscribers {
+			if bridgeName != msg.SourceBridge {
+				if mb.deliverMessage(ch, msg, bridgeName) {
+					routedCount++
+				}
+			}
+		}
+	}
+
+	mb.logger.LogDebug("Message routed",
+		"source_bridge", msg.SourceBridge,
+		"routed_to_count", routedCount)
+
+	return nil
+}
+
+// deliverMessage attempts to deliver a message to a specific subscriber
+func (mb *messageBus) deliverMessage(ch chan *model.DirectionalMessage, msg *model.DirectionalMessage, targetBridge string) bool {
+	select {
+	case ch <- msg:
+		return true
+	case <-time.After(MessageDeliveryTimeout):
+		mb.logger.LogWarn("Message delivery timeout to bridge",
+			"target_bridge", targetBridge,
+			"source_bridge", msg.SourceBridge)
+		return false
+	case <-mb.ctx.Done():
+		return false
+	}
+}
+
+// GetStats returns statistics about the message bus
+func (mb *messageBus) GetStats() map[string]interface{} {
+	mb.subscribersMu.RLock()
+	defer mb.subscribersMu.RUnlock()
+
+	stats := map[string]interface{}{
+		"started":          mb.started,
+		"subscriber_count": len(mb.subscribers),
+		"buffer_size":      DefaultMessageBufferSize,
+		"pending_messages": len(mb.incomingMessages),
+	}
+
+	subscribers := make([]string, 0, len(mb.subscribers))
+	for bridgeName := range mb.subscribers {
+		subscribers = append(subscribers, bridgeName)
+	}
+	stats["subscribers"] = subscribers
+
+	return stats
+}

server/bridge/xmpp/bridge.go

@@ -18,6 +18,11 @@ import (
 	"github.com/mattermost/mattermost/server/public/plugin"
 )
 
+const (
+	// defaultMessageBufferSize is the buffer size for incoming message channels
+	defaultMessageBufferSize = 1000
+)
+
 // xmppBridge handles syncing messages between Mattermost and XMPP
 type xmppBridge struct {
 	logger       logger.Logger
@@ -25,6 +30,12 @@ type xmppBridge struct {
 	kvstore      kvstore.KVStore
 	bridgeClient *xmppClient.Client // Main bridge XMPP client connection
 	userManager  pluginModel.BridgeUserManager
+	remoteID     string             // Remote ID for shared channels
+
+	// Message handling
+	messageHandler   *xmppMessageHandler
+	userResolver     *xmppUserResolver
+	incomingMessages chan *pluginModel.DirectionalMessage
 
 	// Connection management
 	connected atomic.Bool
@@ -41,19 +52,25 @@ type xmppBridge struct {
 }
 
 // NewBridge creates a new XMPP bridge
-func NewBridge(log logger.Logger, api plugin.API, kvstore kvstore.KVStore, cfg *config.Configuration) pluginModel.Bridge {
+func NewBridge(log logger.Logger, api plugin.API, kvstore kvstore.KVStore, cfg *config.Configuration, remoteID string) pluginModel.Bridge {
 	ctx, cancel := context.WithCancel(context.Background())
 	b := &xmppBridge{
-		logger:          log,
-		api:             api,
-		kvstore:         kvstore,
-		ctx:             ctx,
-		cancel:          cancel,
-		channelMappings: make(map[string]string),
-		config:          cfg,
-		userManager:     bridge.NewUserManager("xmpp", log),
+		logger:           log,
+		api:              api,
+		kvstore:          kvstore,
+		ctx:              ctx,
+		cancel:           cancel,
+		channelMappings:  make(map[string]string),
+		config:           cfg,
+		userManager:      bridge.NewUserManager("xmpp", log),
+		incomingMessages: make(chan *pluginModel.DirectionalMessage, defaultMessageBufferSize),
+		remoteID:         remoteID,
 	}
 
+	// Initialize handlers after bridge is created
+	b.messageHandler = newMessageHandler(b)
+	b.userResolver = newUserResolver(b)
+
 	// Initialize XMPP client with configuration
 	if cfg.EnableSync && cfg.XMPPServerURL != "" && cfg.XMPPUsername != "" && cfg.XMPPPassword != "" {
 		b.bridgeClient = b.createXMPPClient(cfg)
@@ -80,56 +97,50 @@ func (b *xmppBridge) createXMPPClient(cfg *config.Configuration) *xmppClient.Cli
 	)
 }
 
+// getConfiguration safely retrieves the current configuration
+func (b *xmppBridge) getConfiguration() *config.Configuration {
+	b.configMu.RLock()
+	defer b.configMu.RUnlock()
+	return b.config
+}
+
 // UpdateConfiguration updates the bridge configuration
-func (b *xmppBridge) UpdateConfiguration(newConfig any) error {
-	cfg, ok := newConfig.(*config.Configuration)
-	if !ok {
-		return fmt.Errorf("invalid configuration type")
+// It handles validation and reconnection logic when the configuration changes
+func (b *xmppBridge) UpdateConfiguration(cfg *config.Configuration) error {
+	// Validate configuration using built-in validation
+	if err := cfg.IsValid(); err != nil {
+		return fmt.Errorf("invalid configuration: %w", err)
 	}
 
-	b.configMu.Lock()
-	oldConfig := b.config
-	b.config = cfg
-	defer b.configMu.Unlock()
+	// Get current config to check if restart is needed
+	oldConfig := b.getConfiguration()
 
-	b.logger.LogInfo("XMPP bridge configuration updated")
+	// Update configuration under lock, then release immediately
+	b.configMu.Lock()
+	b.config = cfg
 
 	// Initialize or update XMPP client with new configuration
-	if cfg.EnableSync {
-		if cfg.XMPPServerURL == "" || cfg.XMPPUsername == "" || cfg.XMPPPassword == "" {
-			return fmt.Errorf("XMPP server URL, username, and password are required when sync is enabled")
+	if !cfg.Equals(oldConfig) {
+		if b.bridgeClient != nil && b.bridgeClient.Disconnect() != nil {
+			b.logger.LogError("Failed to disconnect old XMPP bridge client")
 		}
-
 		b.bridgeClient = b.createXMPPClient(cfg)
-	} else {
-		b.bridgeClient = nil
+	}
+	b.configMu.Unlock()
+
+	// Stop the bridge
+	if err := b.Stop(); err != nil {
+		b.logger.LogWarn("Error stopping bridge during restart", "error", err)
 	}
 
-	// Check if we need to restart the bridge due to configuration changes
-	wasConnected := b.connected.Load()
-	needsRestart := oldConfig != nil && !oldConfig.Equals(cfg) && wasConnected
-
-	// Log the configuration change
-	if needsRestart {
-		b.logger.LogInfo("Configuration changed, restarting bridge")
-	} else {
-		b.logger.LogInfo("Configuration updated", "config", cfg)
+	// Start the bridge with new configuration
+	// Start() method already uses getConfiguration() safely
+	if err := b.Start(); err != nil {
+		b.logger.LogError("Failed to restart bridge with new configuration", "error", err)
+		return fmt.Errorf("failed to restart bridge: %w", err)
 	}
 
-	if needsRestart {
-		b.logger.LogInfo("Configuration changed, restarting bridge")
-
-		// Stop the bridge
-		if err := b.Stop(); err != nil {
-			b.logger.LogWarn("Error stopping bridge during restart", "error", err)
-		}
-
-		// Start the bridge with new configuration
-		if err := b.Start(); err != nil {
-			b.logger.LogError("Failed to restart bridge with new configuration", "error", err)
-			return fmt.Errorf("failed to restart bridge: %w", err)
-		}
-	}
+	b.logger.LogDebug("XMPP bridge configuration updated successfully")
 
 	return nil
 }
@@ -166,6 +177,9 @@ func (b *xmppBridge) Start() error {
 	// Start connection monitor
 	go b.connectionMonitor()
 
+	// Start message aggregation
+	go b.startMessageAggregation()
+
 	b.logger.LogInfo("Mattermost to XMPP bridge started successfully")
 	return nil
 }
@@ -490,8 +504,8 @@ func (b *xmppBridge) DeleteChannelMapping(channelID string) error {
 	return nil
 }
 
-// RoomExists checks if an XMPP room exists on the remote service
-func (b *xmppBridge) RoomExists(roomID string) (bool, error) {
+// ChannelMappingExists checks if an XMPP room exists on the remote service
+func (b *xmppBridge) ChannelMappingExists(roomID string) (bool, error) {
 	if !b.connected.Load() {
 		return false, fmt.Errorf("not connected to XMPP server")
 	}
@@ -535,7 +549,78 @@ func (b *xmppBridge) GetRoomMapping(roomID string) (string, error) {
 	return channelID, nil
 }
 
+// GetChannelMappingForBridge retrieves the Mattermost channel ID for a given room ID from a specific bridge
+func (b *xmppBridge) GetChannelMappingForBridge(bridgeName, roomID string) (string, error) {
+	// Look up the channel ID using the bridge name and room ID as the key
+	channelIDBytes, err := b.kvstore.Get(kvstore.BuildChannelMapKey(bridgeName, roomID))
+	if err != nil {
+		// No mapping found is not an error, just return empty string
+		b.logger.LogDebug("No channel mapping found for bridge room", "bridge_name", bridgeName, "room_id", roomID)
+		return "", nil
+	}
+
+	channelID := string(channelIDBytes)
+	b.logger.LogDebug("Found channel mapping for bridge room", "bridge_name", bridgeName, "room_id", roomID, "channel_id", channelID)
+
+	return channelID, nil
+}
+
 // GetUserManager returns the user manager for this bridge
 func (b *xmppBridge) GetUserManager() pluginModel.BridgeUserManager {
 	return b.userManager
 }
+
+// startMessageAggregation starts the message aggregation goroutine
+func (b *xmppBridge) startMessageAggregation() {
+	clientChannel := b.bridgeClient.GetMessageChannel()
+
+	for {
+		select {
+		case <-b.ctx.Done():
+			b.logger.LogDebug("Stopping XMPP message aggregation")
+			return
+		case msg, ok := <-clientChannel:
+			if !ok {
+				b.logger.LogDebug("Bridge client message channel closed")
+				return
+			}
+
+			// Forward to our bridge's message channel
+			select {
+			case b.incomingMessages <- msg:
+				// Message forwarded successfully
+			case <-b.ctx.Done():
+				return
+			default:
+				b.logger.LogWarn("Bridge message channel full, dropping message",
+					"source_channel", msg.SourceChannelID,
+					"user_id", msg.SourceUserID)
+			}
+		}
+	}
+}
+
+// GetMessageChannel returns the channel for incoming messages from XMPP
+func (b *xmppBridge) GetMessageChannel() <-chan *pluginModel.DirectionalMessage {
+	return b.incomingMessages
+}
+
+// SendMessage sends a message to an XMPP room
+func (b *xmppBridge) SendMessage(msg *pluginModel.BridgeMessage) error {
+	return b.messageHandler.sendMessageToXMPP(msg)
+}
+
+// GetMessageHandler returns the message handler for this bridge
+func (b *xmppBridge) GetMessageHandler() pluginModel.MessageHandler {
+	return b.messageHandler
+}
+
+// GetUserResolver returns the user resolver for this bridge
+func (b *xmppBridge) GetUserResolver() pluginModel.UserResolver {
+	return b.userResolver
+}
+
+// GetRemoteID returns the remote ID used for shared channels registration
+func (b *xmppBridge) GetRemoteID() string {
+	return b.remoteID
+}

server/bridge/xmpp/message_handler.go

@@ -0,0 +1,166 @@
+package xmpp
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/mattermost/mattermost-plugin-bridge-xmpp/server/logger"
+	pluginModel "github.com/mattermost/mattermost-plugin-bridge-xmpp/server/model"
+	xmppClient "github.com/mattermost/mattermost-plugin-bridge-xmpp/server/xmpp"
+)
+
+// xmppMessageHandler handles incoming messages for the XMPP bridge
+type xmppMessageHandler struct {
+	bridge *xmppBridge
+	logger logger.Logger
+}
+
+// newMessageHandler creates a new XMPP message handler
+func newMessageHandler(bridge *xmppBridge) *xmppMessageHandler {
+	return &xmppMessageHandler{
+		bridge: bridge,
+		logger: bridge.logger,
+	}
+}
+
+// ProcessMessage processes an incoming message for the XMPP bridge
+func (h *xmppMessageHandler) ProcessMessage(msg *pluginModel.DirectionalMessage) error {
+	h.logger.LogDebug("Processing message for XMPP bridge",
+		"source_bridge", msg.SourceBridge,
+		"direction", msg.Direction,
+		"channel_id", msg.SourceChannelID)
+
+	// Skip messages that originated from XMPP to prevent loops
+	if msg.SourceBridge == "xmpp" {
+		h.logger.LogDebug("Skipping XMPP-originated message to prevent loop")
+		return nil
+	}
+
+	// For incoming messages to XMPP, we send them to XMPP rooms
+	if msg.Direction == pluginModel.DirectionIncoming {
+		return h.sendMessageToXMPP(msg.BridgeMessage)
+	}
+
+	h.logger.LogDebug("Ignoring outgoing message for XMPP bridge")
+	return nil
+}
+
+// CanHandleMessage determines if this handler can process the message
+func (h *xmppMessageHandler) CanHandleMessage(msg *pluginModel.BridgeMessage) bool {
+	// XMPP bridge can handle text messages that didn't originate from XMPP
+	return msg.MessageType == "text" && msg.SourceBridge != "xmpp"
+}
+
+// GetSupportedMessageTypes returns the message types this handler supports
+func (h *xmppMessageHandler) GetSupportedMessageTypes() []string {
+	return []string{"text"}
+}
+
+// sendMessageToXMPP sends a message to an XMPP room
+func (h *xmppMessageHandler) sendMessageToXMPP(msg *pluginModel.BridgeMessage) error {
+	if h.bridge.bridgeClient == nil {
+		return fmt.Errorf("XMPP client not initialized")
+	}
+
+	if !h.bridge.connected.Load() {
+		return fmt.Errorf("not connected to XMPP server")
+	}
+
+	// Get the XMPP room JID from the channel mapping
+	roomJID, err := h.bridge.GetChannelMapping(msg.SourceChannelID)
+	if err != nil {
+		return fmt.Errorf("failed to get room mapping: %w", err)
+	}
+	if roomJID == "" {
+		return fmt.Errorf("channel is not mapped to any XMPP room")
+	}
+
+	// Format the message content with user information
+	content := h.formatMessageContent(msg)
+
+	// Create XMPP message request
+	req := xmppClient.MessageRequest{
+		RoomJID: roomJID,
+		Message: content,
+	}
+
+	// Send the message
+	_, err = h.bridge.bridgeClient.SendMessage(req)
+	if err != nil {
+		return fmt.Errorf("failed to send message to XMPP room: %w", err)
+	}
+
+	h.logger.LogDebug("Message sent to XMPP room",
+		"channel_id", msg.SourceChannelID,
+		"room_jid", roomJID,
+		"content_length", len(content))
+
+	return nil
+}
+
+// formatMessageContent formats the message content for XMPP
+func (h *xmppMessageHandler) formatMessageContent(msg *pluginModel.BridgeMessage) string {
+	// For messages from other bridges, prefix with the user name
+	if msg.SourceUserName != "" {
+		return fmt.Sprintf("<%s> %s", msg.SourceUserName, msg.Content)
+	}
+	return msg.Content
+}
+
+// xmppUserResolver handles user resolution for the XMPP bridge
+type xmppUserResolver struct {
+	bridge *xmppBridge
+	logger logger.Logger
+}
+
+// newUserResolver creates a new XMPP user resolver
+func newUserResolver(bridge *xmppBridge) *xmppUserResolver {
+	return &xmppUserResolver{
+		bridge: bridge,
+		logger: bridge.logger,
+	}
+}
+
+// ResolveUser converts an external user ID to an ExternalUser
+func (r *xmppUserResolver) ResolveUser(externalUserID string) (*pluginModel.ExternalUser, error) {
+	r.logger.LogDebug("Resolving XMPP user", "user_id", externalUserID)
+
+	// For XMPP, the external user ID is typically the full JID
+	return &pluginModel.ExternalUser{
+		BridgeType:       "xmpp",
+		ExternalUserID:   externalUserID,
+		DisplayName:      r.GetDisplayName(externalUserID),
+		MattermostUserID: "", // Will be resolved by user mapping system
+	}, nil
+}
+
+// FormatUserMention formats a user mention for Markdown content
+func (r *xmppUserResolver) FormatUserMention(user *pluginModel.ExternalUser) string {
+	// For XMPP, we can format mentions as simple text with the display name
+	return fmt.Sprintf("@%s", user.DisplayName)
+}
+
+// GetDisplayName extracts display name from external user ID
+func (r *xmppUserResolver) GetDisplayName(externalUserID string) string {
+	// For XMPP JIDs, extract the local part or resource as display name
+	// Format: user@domain/resource -> use resource or user
+	if len(externalUserID) == 0 {
+		return "Unknown User"
+	}
+
+	// Try to parse as JID and extract meaningful display name
+	parts := strings.Split(externalUserID, "/")
+	if len(parts) > 1 {
+		// Has resource part, use it as display name
+		return parts[1]
+	}
+
+	// No resource, try to extract local part from user@domain
+	atIndex := strings.Index(externalUserID, "@")
+	if atIndex > 0 {
+		return externalUserID[:atIndex]
+	}
+
+	// Fallback to the full ID
+	return externalUserID
+}

server/command/command.go

@@ -6,11 +6,13 @@ import (
 
 	pluginModel "github.com/mattermost/mattermost-plugin-bridge-xmpp/server/model"
 	"github.com/mattermost/mattermost/server/public/model"
+	"github.com/mattermost/mattermost/server/public/plugin"
 	"github.com/mattermost/mattermost/server/public/pluginapi"
 )
 
 type Handler struct {
 	client        *pluginapi.Client
+	api           plugin.API
 	bridgeManager pluginModel.BridgeManager
 }
 
@@ -22,7 +24,7 @@ type Command interface {
 const xmppBridgeCommandTrigger = "xmppbridge"
 
 // Register all your slash commands in the NewCommandHandler function.
-func NewCommandHandler(client *pluginapi.Client, bridgeManager pluginModel.BridgeManager) Command {
+func NewCommandHandler(client *pluginapi.Client, api plugin.API, bridgeManager pluginModel.BridgeManager) Command {
 	// Register XMPP bridge command
 	xmppBridgeData := model.NewAutocompleteData(xmppBridgeCommandTrigger, "", "Manage XMPP bridge")
 	mapSubcommand := model.NewAutocompleteData("map", "[room_jid]", "Map current channel to XMPP room")
@@ -35,11 +37,17 @@ func NewCommandHandler(client *pluginapi.Client, bridgeManager pluginModel.Bridg
 	statusSubcommand := model.NewAutocompleteData("status", "", "Show bridge connection status")
 	xmppBridgeData.AddCommand(statusSubcommand)
 
+	syncSubcommand := model.NewAutocompleteData("sync", "", "Force sync with shared channels if channel is mapped")
+	xmppBridgeData.AddCommand(syncSubcommand)
+
+	syncResetSubcommand := model.NewAutocompleteData("sync-reset", "", "Reset sync cursor for channel if mapped")
+	xmppBridgeData.AddCommand(syncResetSubcommand)
+
 	err := client.SlashCommand.Register(&model.Command{
 		Trigger:          xmppBridgeCommandTrigger,
 		AutoComplete:     true,
 		AutoCompleteDesc: "Manage XMPP bridge mappings",
-		AutoCompleteHint: "[map|unmap|status]",
+		AutoCompleteHint: "[map|unmap|status|sync|sync-reset]",
 		AutocompleteData: xmppBridgeData,
 	})
 	if err != nil {
@@ -48,6 +56,7 @@ func NewCommandHandler(client *pluginapi.Client, bridgeManager pluginModel.Bridg
 
 	return &Handler{
 		client:        client,
+		api:           api,
 		bridgeManager: bridgeManager,
 	}
 }
@@ -85,6 +94,8 @@ func (c *Handler) executeXMPPBridgeCommand(args *model.CommandArgs) *model.Comma
 - ` + "`/xmppbridge map <room_jid>`" + ` - Map current channel to XMPP room
 - ` + "`/xmppbridge unmap`" + ` - Unmap current channel from XMPP room
 - ` + "`/xmppbridge status`" + ` - Show bridge connection status
+- ` + "`/xmppbridge sync`" + ` - Force sync with shared channels if channel is mapped
+- ` + "`/xmppbridge sync-reset`" + ` - Reset sync cursor for channel if mapped
 
 **Example:**
 ` + "`/xmppbridge map general@conference.example.com`",
@@ -99,6 +110,10 @@ func (c *Handler) executeXMPPBridgeCommand(args *model.CommandArgs) *model.Comma
 		return c.executeUnmapCommand(args)
 	case "status":
 		return c.executeStatusCommand(args)
+	case "sync":
+		return c.executeSyncCommand(args)
+	case "sync-reset":
+		return c.executeSyncResetCommand(args)
 	default:
 		return &model.CommandResponse{
 			ResponseType: model.CommandResponseTypeEphemeral,
@@ -161,11 +176,11 @@ func (c *Handler) executeMapCommand(args *model.CommandArgs, fields []string) *m
 
 	// Create the mapping using BridgeManager
 	mappingReq := pluginModel.CreateChannelMappingRequest{
-		ChannelID:    channelID,
-		BridgeName:   "xmpp",
-		BridgeRoomID: roomJID,
-		UserID:       args.UserId,
-		TeamID:       args.TeamId,
+		ChannelID:       channelID,
+		BridgeName:      "xmpp",
+		BridgeChannelID: roomJID,
+		UserID:          args.UserId,
+		TeamID:          args.TeamId,
 	}
 
 	err = c.bridgeManager.CreateChannelMapping(mappingReq)
@@ -284,6 +299,105 @@ func (c *Handler) isSystemAdmin(userID string) bool {
 }
 
 // formatMappingError provides user-friendly error messages for mapping operations
+func (c *Handler) executeSyncCommand(args *model.CommandArgs) *model.CommandResponse {
+	channelID := args.ChannelId
+
+	// Get the XMPP bridge to check if channel is mapped
+	bridge, err := c.bridgeManager.GetBridge("xmpp")
+	if err != nil {
+		return &model.CommandResponse{
+			ResponseType: model.CommandResponseTypeEphemeral,
+			Text:         "❌ XMPP bridge is not available. Please check the plugin configuration.",
+		}
+	}
+
+	// Check if channel is mapped to XMPP
+	roomJID, err := bridge.GetChannelMapping(channelID)
+	if err != nil {
+		return &model.CommandResponse{
+			ResponseType: model.CommandResponseTypeEphemeral,
+			Text:         fmt.Sprintf("Error checking channel mapping: %v", err),
+		}
+	}
+
+	if roomJID == "" {
+		return &model.CommandResponse{
+			ResponseType: model.CommandResponseTypeEphemeral,
+			Text:         "❌ This channel is not mapped to any XMPP room. Use `/xmppbridge map <room_jid>` to create a mapping first.",
+		}
+	}
+
+	// Force sync with shared channels
+	if err := c.api.SyncSharedChannel(channelID); err != nil {
+		return &model.CommandResponse{
+			ResponseType: model.CommandResponseTypeEphemeral,
+			Text:         fmt.Sprintf("❌ Failed to sync channel: %v", err),
+		}
+	}
+
+	return &model.CommandResponse{
+		ResponseType: model.CommandResponseTypeEphemeral,
+		Text:         fmt.Sprintf("✅ Successfully triggered sync for channel mapped to XMPP room: `%s`", roomJID),
+	}
+}
+
+func (c *Handler) executeSyncResetCommand(args *model.CommandArgs) *model.CommandResponse {
+	channelID := args.ChannelId
+
+	// Get the XMPP bridge to check if channel is mapped
+	bridge, err := c.bridgeManager.GetBridge("xmpp")
+	if err != nil {
+		return &model.CommandResponse{
+			ResponseType: model.CommandResponseTypeEphemeral,
+			Text:         "❌ XMPP bridge is not available. Please check the plugin configuration.",
+		}
+	}
+
+	// Check if channel is mapped to XMPP
+	roomJID, err := bridge.GetChannelMapping(channelID)
+	if err != nil {
+		return &model.CommandResponse{
+			ResponseType: model.CommandResponseTypeEphemeral,
+			Text:         fmt.Sprintf("Error checking channel mapping: %v", err),
+		}
+	}
+
+	if roomJID == "" {
+		return &model.CommandResponse{
+			ResponseType: model.CommandResponseTypeEphemeral,
+			Text:         "❌ This channel is not mapped to any XMPP room. Use `/xmppbridge map <room_jid>` to create a mapping first.",
+		}
+	}
+
+	// Get remoteID from bridge for cursor operations
+	remoteID := bridge.GetRemoteID()
+	if remoteID == "" {
+		return &model.CommandResponse{
+			ResponseType: model.CommandResponseTypeEphemeral,
+			Text:         "❌ Bridge remote ID not available. Cannot reset sync cursor.",
+		}
+	}
+
+	// Create empty cursor to reset to beginning
+	emptyCursor := model.GetPostsSinceForSyncCursor{
+		LastPostUpdateAt: 1,
+		LastPostCreateAt: 1,
+	}
+
+	// Reset sync cursor using UpdateSharedChannelCursor
+	if err := c.api.UpdateSharedChannelCursor(channelID, remoteID, emptyCursor); err != nil {
+		return &model.CommandResponse{
+			ResponseType: model.CommandResponseTypeEphemeral,
+			Text:         fmt.Sprintf("❌ Failed to reset sync cursor: %v", err),
+		}
+	}
+
+	return &model.CommandResponse{
+		ResponseType: model.CommandResponseTypeEphemeral,
+		Text:         fmt.Sprintf("✅ Successfully reset sync cursor for channel mapped to XMPP room: `%s`", roomJID),
+	}
+}
+
 func (c *Handler) formatMappingError(operation, roomJID string, err error) *model.CommandResponse {
 	errorMsg := err.Error()
 
@@ -292,7 +406,7 @@ func (c *Handler) formatMappingError(operation, roomJID string, err error) *mode
 	case strings.Contains(errorMsg, "already mapped to channel"):
 		return &model.CommandResponse{
 			ResponseType: model.CommandResponseTypeEphemeral,
-			Text: fmt.Sprintf(`❌ **Room Already Mapped**
+			Text: fmt.Sprintf(`❌ **Channel Already Mapped**
 
 The XMPP room **%s** is already connected to another channel.
 
@@ -305,7 +419,7 @@ The XMPP room **%s** is already connected to another channel.
 	case strings.Contains(errorMsg, "does not exist"):
 		return &model.CommandResponse{
 			ResponseType: model.CommandResponseTypeEphemeral,
-			Text: fmt.Sprintf(`❌ **Room Not Found**
+			Text: fmt.Sprintf(`❌ **Channel Not Found**
 
 The XMPP room **%s** doesn't exist or isn't accessible.
 

server/configuration.go

@@ -57,7 +57,7 @@ func (p *Plugin) OnConfigurationChange() error {
 		return errors.Wrap(err, "failed to load plugin configuration")
 	}
 
-	p.API.LogDebug("Loaded configuration in OnConfigurationChange", "configuration", configuration)
+	p.API.LogDebug("Plugin configuration changed")
 
 	// Validate the configuration
 	if err := configuration.IsValid(); err != nil {

server/hooks_sharedchannels.go

@@ -1,18 +1,24 @@
 package main
 
-import "github.com/mattermost/mattermost/server/public/model"
+import (
+	"fmt"
+	"time"
+
+	pluginModel "github.com/mattermost/mattermost-plugin-bridge-xmpp/server/model"
+	"github.com/mattermost/mattermost/server/public/model"
+)
 
 // OnSharedChannelsPing is called to check if the bridge is healthy and ready to process messages
 func (p *Plugin) OnSharedChannelsPing(remoteCluster *model.RemoteCluster) bool {
 	config := p.getConfiguration()
 
-	p.logger.LogDebug("OnSharedChannelsPing called", "remote_cluster_id", remoteCluster.RemoteId)
-
 	var remoteClusterID string
 	if remoteCluster != nil {
 		remoteClusterID = remoteCluster.RemoteId
 	}
 
+	p.logger.LogDebug("OnSharedChannelsPing called", "remote_cluster_id", remoteClusterID)
+
 	p.logger.LogDebug("Received shared channels ping", "remote_cluster_id", remoteClusterID)
 
 	// If sync is disabled, we're still "healthy" but not actively processing
@@ -44,3 +50,119 @@ func (p *Plugin) OnSharedChannelsPing(remoteCluster *model.RemoteCluster) bool {
 	p.logger.LogDebug("Shared channels ping successful - XMPP bridge is healthy", "remote_cluster_id", remoteClusterID)
 	return true
 }
+
+// OnSharedChannelsSyncMsg processes sync messages from Mattermost shared channels and routes them to XMPP
+func (p *Plugin) OnSharedChannelsSyncMsg(msg *model.SyncMsg, rc *model.RemoteCluster) (model.SyncResponse, error) {
+	config := p.getConfiguration()
+
+	// Initialize sync response
+	now := model.GetMillis()
+	response := model.SyncResponse{
+		PostsLastUpdateAt:     now,
+		UsersLastUpdateAt:     now,
+		ReactionsLastUpdateAt: now,
+	}
+
+	var remoteClusterID string
+	if rc != nil {
+		remoteClusterID = rc.RemoteId
+	}
+
+	p.logger.LogDebug("OnSharedChannelsSyncMsg called",
+		"remote_cluster_id", remoteClusterID,
+		"channel_id", msg.ChannelId,
+		"post_count", len(msg.Posts))
+
+	// If sync is disabled, return success but don't process
+	if !config.EnableSync {
+		p.logger.LogDebug("Sync message received but sync is disabled", "remote_cluster_id", remoteClusterID)
+		return response, nil
+	}
+
+	// Process each post in the sync message
+	var processedCount int
+	var errors []string
+
+	for _, post := range msg.Posts {
+		if err := p.processSyncPost(post, msg.ChannelId, msg.Users); err != nil {
+			errorMsg := fmt.Sprintf("failed to process post %s: %v", post.Id, err)
+			errors = append(errors, errorMsg)
+			p.logger.LogError("Failed to process sync post", "post_id", post.Id, "error", err)
+		} else {
+			processedCount++
+		}
+	}
+
+	p.logger.LogInfo("Processed sync message",
+		"remote_cluster_id", remoteClusterID,
+		"channel_id", msg.ChannelId,
+		"processed_posts", processedCount,
+		"failed_posts", len(errors))
+
+	// If we have errors, return them
+	if len(errors) > 0 {
+		return response, fmt.Errorf("failed to process %d posts: %v", len(errors), errors)
+	}
+
+	return response, nil
+}
+
+// processSyncPost converts a Mattermost post to a bridge message and routes it to XMPP
+func (p *Plugin) processSyncPost(post *model.Post, channelID string, users map[string]*model.User) error {
+	// Find the user who created this post
+	var postUser *model.User
+	p.logger.LogInfo("Processing sync post", "post_id", post.UserId, "users", users)
+	if users != nil {
+		postUser = users[post.UserId]
+	}
+
+	// If user not found in sync data, try to get from API
+	if postUser == nil {
+		var err error
+		postUser, err = p.API.GetUser(post.UserId)
+		if err != nil {
+			p.logger.LogWarn("Failed to get user for post", "user_id", post.UserId, "post_id", post.Id, "error", err)
+			// Create a placeholder user
+			postUser = &model.User{
+				Id:       post.UserId,
+				Username: "unknown-user",
+			}
+		}
+	}
+
+	// Create bridge message from Mattermost post
+	bridgeMessage := &pluginModel.BridgeMessage{
+		SourceBridge:    "mattermost",
+		SourceChannelID: channelID,
+		SourceUserID:    postUser.Id,
+		SourceUserName:  postUser.Username,
+		Content:         post.Message,
+		MessageType:     "text", // TODO: Handle other message types
+		Timestamp:       time.Unix(post.CreateAt/1000, 0),
+		MessageID:       post.Id,
+		ThreadID:        post.RootId,
+		TargetBridges:   []string{"xmpp"}, // Route to XMPP
+		Metadata: map[string]any{
+			"original_post": post,
+			"channel_id":    channelID,
+		},
+	}
+
+	// Create directional message for outgoing (Mattermost -> XMPP)
+	directionalMessage := &pluginModel.DirectionalMessage{
+		BridgeMessage: bridgeMessage,
+		Direction:     pluginModel.DirectionOutgoing,
+	}
+
+	// Publish the message to the message bus for routing to XMPP bridge
+	if err := p.bridgeManager.PublishMessage(directionalMessage); err != nil {
+		return fmt.Errorf("failed to publish sync message to message bus: %w", err)
+	}
+
+	p.logger.LogDebug("Successfully published sync message to message bus",
+		"post_id", post.Id,
+		"channel_id", channelID,
+		"user", postUser.Username)
+
+	return nil
+}

server/model/bridge.go

@@ -20,11 +20,11 @@ const (
 
 // CreateChannelMappingRequest contains information needed to create a channel mapping
 type CreateChannelMappingRequest struct {
-	ChannelID    string // Mattermost channel ID
-	BridgeName   string // Name of the bridge (e.g., "xmpp")
-	BridgeRoomID string // Remote room/channel ID (e.g., JID for XMPP)
-	UserID       string // ID of user who triggered the mapping creation
-	TeamID       string // Team ID where the channel belongs
+	ChannelID       string // Mattermost channel ID
+	BridgeName      string // Name of the bridge (e.g., "xmpp")
+	BridgeChannelID string // Remote room/channel ID (e.g., JID for XMPP)
+	UserID          string // ID of user who triggered the mapping creation
+	TeamID          string // Team ID where the channel belongs
 }
 
 // Validate checks if all required fields are present and valid
@@ -35,8 +35,8 @@ func (r CreateChannelMappingRequest) Validate() error {
 	if r.BridgeName == "" {
 		return fmt.Errorf("bridgeName cannot be empty")
 	}
-	if r.BridgeRoomID == "" {
-		return fmt.Errorf("bridgeRoomID cannot be empty")
+	if r.BridgeChannelID == "" {
+		return fmt.Errorf("bridgeChannelID cannot be empty")
 	}
 	if r.UserID == "" {
 		return fmt.Errorf("userID cannot be empty")
@@ -73,6 +73,9 @@ func (r DeleteChannelMappingRequest) Validate() error {
 }
 
 type BridgeManager interface {
+	// Start starts the bridge manager and message routing system.
+	Start() error
+
 	// RegisterBridge registers a bridge with the given name. Returns an error if the name is empty,
 	// the bridge is nil, or a bridge with the same name is already registered.
 	RegisterBridge(name string, bridge Bridge) error
@@ -110,18 +113,21 @@ type BridgeManager interface {
 	// OnPluginConfigurationChange propagates configuration changes to all registered bridges.
 	// Returns an error if any bridge fails to update its configuration, but continues to
 	// attempt updating all bridges.
-	OnPluginConfigurationChange(config any) error
+	OnPluginConfigurationChange(config *config.Configuration) error
 
 	// CreateChannelMapping is called when a channel mapping is created.
 	CreateChannelMapping(req CreateChannelMappingRequest) error
 
 	// DeleteChannepMapping is called when a channel mapping is deleted.
 	DeleteChannepMapping(req DeleteChannelMappingRequest) error
+
+	// PublishMessage publishes a message to the message bus for routing to target bridges
+	PublishMessage(msg *DirectionalMessage) error
 }
 
 type Bridge interface {
 	// UpdateConfiguration updates the bridge configuration
-	UpdateConfiguration(config any) error
+	UpdateConfiguration(config *config.Configuration) error
 
 	// Start starts the bridge
 	Start() error
@@ -129,20 +135,20 @@ type Bridge interface {
 	// Stop stops the bridge
 	Stop() error
 
-	// CreateChannelMapping creates a mapping between a Mattermost channel ID and an bridge room ID.
+	// CreateChannelMapping creates a mapping between a Mattermost channel ID and a bridge channel ID.
 	CreateChannelMapping(channelID, roomJID string) error
 
-	// GetChannelMapping retrieves the bridge room ID for a given Mattermost channel ID.
+	// GetChannelMapping retrieves the bridge channel ID for a given Mattermost channel ID.
 	GetChannelMapping(channelID string) (string, error)
 
-	// DeleteChannelMapping removes a mapping between a Mattermost channel ID and a bridge room ID.
+	// DeleteChannelMapping removes a mapping between a Mattermost channel ID and a bridge channel ID.
 	DeleteChannelMapping(channelID string) error
 
-	// RoomExists checks if a room/channel exists on the remote service.
-	RoomExists(roomID string) (bool, error)
+	// ChannelMappingExists checks if a room/channel exists on the remote service.
+	ChannelMappingExists(roomID string) (bool, error)
 
-	// GetRoomMapping retrieves the Mattermost channel ID for a given room ID (reverse lookup).
-	GetRoomMapping(roomID string) (string, error)
+	// GetChannelMappingForBridge retrieves the Mattermost channel ID for a given room ID from a specific bridge.
+	GetChannelMappingForBridge(bridgeName, roomID string) (string, error)
 
 	// IsConnected checks if the bridge is connected to the remote service.
 	IsConnected() bool
@@ -152,6 +158,15 @@ type Bridge interface {
 
 	// GetUserManager returns the user manager for this bridge.
 	GetUserManager() BridgeUserManager
+
+	// Message handling for bidirectional communication
+	GetMessageChannel() <-chan *DirectionalMessage
+	SendMessage(msg *BridgeMessage) error
+	GetMessageHandler() MessageHandler
+	GetUserResolver() UserResolver
+
+	// GetRemoteID returns the remote ID used for shared channels registration
+	GetRemoteID() string
 }
 
 // BridgeUser represents a user connected to any bridge service

server/model/message.go

@@ -0,0 +1,88 @@
+package model
+
+import (
+	"time"
+)
+
+// MessageDirection indicates the direction of message flow
+type MessageDirection string
+
+const (
+	DirectionIncoming MessageDirection = "incoming" // From external system to us
+	DirectionOutgoing MessageDirection = "outgoing" // From us to external system
+)
+
+// BridgeMessage represents a message that can be passed between any bridge types
+type BridgeMessage struct {
+	// Source information
+	SourceBridge    string // "xmpp", "mattermost", "slack", etc.
+	SourceChannelID string // Channel ID in source system
+	SourceUserID    string // User ID in source system (JID, user ID, etc.)
+	SourceUserName  string // Display name in source system
+
+	// Message content (standardized on Markdown)
+	Content     string // Markdown formatted message content
+	MessageType string // "text", "image", "file", etc.
+
+	// Metadata
+	Timestamp time.Time // When message was received
+	MessageID string    // Unique message ID from source
+	ThreadID  string    // Thread/reply ID (if applicable)
+
+	// Routing hints
+	TargetBridges []string       // Which bridges should receive this
+	Metadata      map[string]any // Bridge-specific metadata
+}
+
+// DirectionalMessage wraps a BridgeMessage with direction information
+type DirectionalMessage struct {
+	*BridgeMessage
+	Direction MessageDirection
+}
+
+// ExternalUser represents a user from any bridge system
+type ExternalUser struct {
+	BridgeType       string // "xmpp", "slack", etc.
+	ExternalUserID   string // JID, Slack user ID, etc.
+	DisplayName      string // How to display this user
+	MattermostUserID string // Mapped Mattermost user (if exists)
+}
+
+// UserResolver handles user resolution for a specific bridge
+type UserResolver interface {
+	// ResolveUser converts an external user ID to an ExternalUser
+	ResolveUser(externalUserID string) (*ExternalUser, error)
+
+	// FormatUserMention formats a user mention for Markdown content
+	FormatUserMention(user *ExternalUser) string
+
+	// GetDisplayName extracts display name from external user ID
+	GetDisplayName(externalUserID string) string
+}
+
+// MessageBus handles routing messages between bridges
+type MessageBus interface {
+	// Subscribe returns a channel that receives messages for the specified bridge
+	Subscribe(bridgeName string) <-chan *DirectionalMessage
+
+	// Publish sends a message to the message bus for routing
+	Publish(msg *DirectionalMessage) error
+
+	// Start begins message routing
+	Start() error
+
+	// Stop ends message routing and cleans up resources
+	Stop() error
+}
+
+// MessageHandler processes incoming messages for a bridge
+type MessageHandler interface {
+	// ProcessMessage handles an incoming message
+	ProcessMessage(msg *DirectionalMessage) error
+
+	// CanHandleMessage determines if this handler can process the message
+	CanHandleMessage(msg *BridgeMessage) bool
+
+	// GetSupportedMessageTypes returns the message types this handler supports
+	GetSupportedMessageTypes() []string
+}

server/plugin.go

@@ -14,7 +14,6 @@ import (
 	"github.com/mattermost/mattermost-plugin-bridge-xmpp/server/logger"
 	pluginModel "github.com/mattermost/mattermost-plugin-bridge-xmpp/server/model"
 	"github.com/mattermost/mattermost-plugin-bridge-xmpp/server/store/kvstore"
-	"github.com/mattermost/mattermost-plugin-bridge-xmpp/server/xmpp"
 	"github.com/mattermost/mattermost/server/public/model"
 	"github.com/mattermost/mattermost/server/public/plugin"
 	"github.com/mattermost/mattermost/server/public/pluginapi"
@@ -35,9 +34,6 @@ type Plugin struct {
 	// commandClient is the client used to register and execute slash commands.
 	commandClient command.Command
 
-	// xmppClient is the client used to communicate with XMPP servers.
-	xmppClient *xmpp.Client
-
 	// logger is the main plugin logger
 	logger logger.Logger
 
@@ -70,15 +66,11 @@ func (p *Plugin) OnActivate() error {
 
 	p.kvstore = kvstore.NewKVStore(p.client)
 
-	p.initXMPPClient()
-
 	// Load configuration directly
 	cfg := p.getConfiguration()
-	p.logger.LogDebug("Loaded configuration in OnActivate", "config", cfg)
 
 	// Register the plugin for shared channels
 	if err := p.registerForSharedChannels(); err != nil {
-		p.logger.LogError("Failed to register for shared channels", "error", err)
 		return fmt.Errorf("failed to register for shared channels: %w", err)
 	}
 
@@ -87,11 +79,15 @@ func (p *Plugin) OnActivate() error {
 
 	// Initialize and register bridges with current configuration
 	if err := p.initBridges(*cfg); err != nil {
-		p.logger.LogError("Failed to initialize bridges", "error", err)
 		return fmt.Errorf("failed to initialize bridges: %w", err)
 	}
 
-	p.commandClient = command.NewCommandHandler(p.client, p.bridgeManager)
+	p.commandClient = command.NewCommandHandler(p.client, p.API, p.bridgeManager)
+
+	// Start the bridge manager (this starts message routing)
+	if err := p.bridgeManager.Start(); err != nil {
+		return fmt.Errorf("failed to start bridge manager: %w", err)
+	}
 
 	// Start all bridges
 	for _, bridgeName := range p.bridgeManager.ListBridges() {
@@ -145,18 +141,6 @@ func (p *Plugin) ExecuteCommand(c *plugin.Context, args *model.CommandArgs) (*mo
 	return response, nil
 }
 
-func (p *Plugin) initXMPPClient() {
-	cfg := p.getConfiguration()
-	p.xmppClient = xmpp.NewClient(
-		cfg.XMPPServerURL,
-		cfg.XMPPUsername,
-		cfg.XMPPPassword,
-		cfg.GetXMPPResource(),
-		p.remoteID,
-		p.logger,
-	)
-}
-
 func (p *Plugin) initBridges(cfg config.Configuration) error {
 	// Create and register XMPP bridge
 	xmppBridge := xmppbridge.NewBridge(
@@ -164,6 +148,7 @@ func (p *Plugin) initBridges(cfg config.Configuration) error {
 		p.API,
 		p.kvstore,
 		&cfg,
+		p.remoteID,
 	)
 
 	if err := p.bridgeManager.RegisterBridge("xmpp", xmppBridge); err != nil {
@@ -176,6 +161,8 @@ func (p *Plugin) initBridges(cfg config.Configuration) error {
 		p.API,
 		p.kvstore,
 		&cfg,
+		p.botUserID,
+		"mattermost",
 	)
 
 	if err := p.bridgeManager.RegisterBridge("mattermost", mattermostBridge); err != nil {
@@ -203,7 +190,7 @@ func (p *Plugin) registerForSharedChannels() error {
 		PluginID:     manifest.Id,
 		CreatorID:    botUserID,
 		AutoShareDMs: false,
-		AutoInvited:  true,
+		AutoInvited:  false,
 	}
 
 	remoteID, appErr := p.API.RegisterPluginForSharedChannels(opts)

server/store/kvstore/constants.go

@@ -7,72 +7,17 @@ import "strings"
 // to ensure consistency and avoid key conflicts.
 
 const (
-	// CurrentKVStoreVersion is the current version requiring migrations
-	CurrentKVStoreVersion = 2
-	// KeyPrefixXMPPUser is the prefix for XMPP user ID -> Mattermost user ID mappings
-	KeyPrefixXMPPUser = "xmpp_user_"
-	// KeyPrefixMattermostUser is the prefix for Mattermost user ID -> XMPP user ID mappings
-	KeyPrefixMattermostUser = "mattermost_user_"
-
 	// KeyPrefixChannelMap is the prefix for bridge-agnostic channel mappings
 	KeyPrefixChannelMap = "channel_map_"
-
-	// KeyPrefixGhostUser is the prefix for Mattermost user ID -> XMPP ghost user ID cache
-	KeyPrefixGhostUser = "ghost_user_"
-	// KeyPrefixGhostRoom is the prefix for ghost user room membership tracking
-	KeyPrefixGhostRoom = "ghost_room_"
-
-	// KeyPrefixXMPPEventPost is the prefix for XMPP event ID -> Mattermost post ID mappings
-	KeyPrefixXMPPEventPost = "xmpp_event_post_"
-	// KeyPrefixXMPPReaction is the prefix for XMPP reaction event ID -> reaction info mappings
-	KeyPrefixXMPPReaction = "xmpp_reaction_"
-
-	// KeyStoreVersion is the key for tracking the current KV store schema version
-	KeyStoreVersion = "kv_store_version"
-
-	// KeyPrefixLegacyDMMapping was the old prefix for DM mappings
-	KeyPrefixLegacyDMMapping = "dm_mapping_"
-	// KeyPrefixLegacyXMPPDMMapping was the old prefix for XMPP DM mappings
-	KeyPrefixLegacyXMPPDMMapping = "xmpp_dm_mapping_"
 )
 
 // Helper functions for building KV store keys
 
-// BuildXMPPUserKey creates a key for XMPP user -> Mattermost user mapping
-func BuildXMPPUserKey(xmppUserID string) string {
-	return KeyPrefixXMPPUser + xmppUserID
-}
-
-// BuildMattermostUserKey creates a key for Mattermost user -> XMPP user mapping
-func BuildMattermostUserKey(mattermostUserID string) string {
-	return KeyPrefixMattermostUser + mattermostUserID
-}
-
 // BuildChannelMapKey creates a bridge-agnostic key for channel mappings
 func BuildChannelMapKey(bridgeName, identifier string) string {
 	return KeyPrefixChannelMap + bridgeName + "_" + identifier
 }
 
-// BuildGhostUserKey creates a key for ghost user cache
-func BuildGhostUserKey(mattermostUserID string) string {
-	return KeyPrefixGhostUser + mattermostUserID
-}
-
-// BuildGhostRoomKey creates a key for ghost user room membership
-func BuildGhostRoomKey(mattermostUserID, roomID string) string {
-	return KeyPrefixGhostRoom + mattermostUserID + "_" + roomID
-}
-
-// BuildXMPPEventPostKey creates a key for XMPP event -> post mapping
-func BuildXMPPEventPostKey(xmppEventID string) string {
-	return KeyPrefixXMPPEventPost + xmppEventID
-}
-
-// BuildXMPPReactionKey creates a key for XMPP reaction storage
-func BuildXMPPReactionKey(reactionEventID string) string {
-	return KeyPrefixXMPPReaction + reactionEventID
-}
-
 // ExtractIdentifierFromChannelMapKey extracts the identifier from a bridge-agnostic channel map key
 func ExtractIdentifierFromChannelMapKey(key, bridgeName string) string {
 	expectedPrefix := KeyPrefixChannelMap + bridgeName + "_"
@@ -83,4 +28,4 @@ func ExtractIdentifierFromChannelMapKey(key, bridgeName string) string {
 		return ""
 	}
 	return key[len(expectedPrefix):]
-}
+}

server/xmpp/client.go

@@ -6,10 +6,15 @@ import (
 	"crypto/tls"
 	"encoding/xml"
 	"fmt"
+	"net"
+	"net/url"
 	"time"
 
+	"github.com/jellydator/ttlcache/v3"
 	"github.com/mattermost/mattermost-plugin-bridge-xmpp/server/logger"
+	"github.com/mattermost/mattermost-plugin-bridge-xmpp/server/model"
 	"mellium.im/sasl"
+	"mellium.im/xmlstream"
 	"mellium.im/xmpp"
 	"mellium.im/xmpp/disco"
 	"mellium.im/xmpp/jid"
@@ -18,6 +23,17 @@ import (
 	"mellium.im/xmpp/stanza"
 )
 
+const (
+	// defaultOperationTimeout is the default timeout for XMPP operations
+	defaultOperationTimeout = 5 * time.Second
+
+	// msgBufferSize is the buffer size for incoming message channels
+	msgBufferSize = 1000
+
+	// messageDedupeTTL is the TTL for message deduplication cache
+	messageDedupeTTL = 30 * time.Second
+)
+
 // Client represents an XMPP client for communicating with XMPP servers.
 type Client struct {
 	serverURL    string
@@ -38,6 +54,12 @@ type Client struct {
 	mux            *mux.ServeMux
 	sessionReady   chan struct{}
 	sessionServing bool
+
+	// Message handling for bridge integration
+	incomingMessages chan *model.DirectionalMessage
+
+	// Message deduplication cache to handle XMPP server duplicates
+	dedupeCache *ttlcache.Cache[string, time.Time]
 }
 
 // MessageRequest represents a request to send a message.
@@ -85,22 +107,40 @@ type UserProfile struct {
 // NewClient creates a new XMPP client.
 func NewClient(serverURL, username, password, resource, remoteID string, logger logger.Logger) *Client {
 	ctx, cancel := context.WithCancel(context.Background())
-	mucClient := &muc.Client{}
-	mux := mux.New("jabber:client", muc.HandleClient(mucClient))
 
-	return &Client{
-		serverURL:    serverURL,
-		username:     username,
-		password:     password,
-		resource:     resource,
-		remoteID:     remoteID,
-		logger:       logger,
-		ctx:          ctx,
-		cancel:       cancel,
-		mucClient:    mucClient,
-		mux:          mux,
-		sessionReady: make(chan struct{}),
+	// Create TTL cache for message deduplication
+	dedupeCache := ttlcache.New(
+		ttlcache.WithTTL[string, time.Time](messageDedupeTTL),
+	)
+
+	// Start automatic cleanup in background
+	go dedupeCache.Start()
+
+	client := &Client{
+		serverURL:        serverURL,
+		username:         username,
+		password:         password,
+		resource:         resource,
+		remoteID:         remoteID,
+		logger:           logger,
+		ctx:              ctx,
+		cancel:           cancel,
+		sessionReady:     make(chan struct{}),
+		incomingMessages: make(chan *model.DirectionalMessage, msgBufferSize),
+		dedupeCache:      dedupeCache,
 	}
+
+	// Create MUC client and set up message handling
+	mucClient := &muc.Client{}
+	client.mucClient = mucClient
+
+	// Create mux with MUC client and our message handler
+	mux := mux.New("jabber:client",
+		muc.HandleClient(mucClient),
+		mux.MessageFunc(stanza.GroupChatMessage, xml.Name{}, client.handleIncomingMessage))
+	client.mux = mux
+
+	return client
 }
 
 // NewClientWithTLS creates a new XMPP client with custom TLS configuration.
@@ -115,6 +155,44 @@ func (c *Client) SetServerDomain(domain string) {
 	c.serverDomain = domain
 }
 
+// parseServerAddress parses a server URL and returns a host:port address
+func (c *Client) parseServerAddress(serverURL string) (string, error) {
+	// Handle simple host:port format (e.g., "localhost:5222")
+	if host, port, err := net.SplitHostPort(serverURL); err == nil {
+		// Already in host:port format, validate and return
+		if host == "" {
+			return "", fmt.Errorf("empty hostname in server URL: %s", serverURL)
+		}
+		if port == "" {
+			return "", fmt.Errorf("empty port in server URL: %s", serverURL)
+		}
+		return serverURL, nil
+	}
+
+	// Try parsing as URL (e.g., "xmpp://localhost:5222" or "xmpps://localhost:5223")
+	parsedURL, err := url.Parse(serverURL)
+	if err != nil {
+		return "", fmt.Errorf("invalid server URL format: %w", err)
+	}
+
+	host := parsedURL.Hostname()
+	if host == "" {
+		return "", fmt.Errorf("no hostname found in server URL: %s", serverURL)
+	}
+
+	port := parsedURL.Port()
+	// Use default XMPP port if not specified
+	if port == "" {
+		if parsedURL.Scheme == "xmpps" {
+			port = "5223"
+		} else {
+			port = "5222"
+		}
+	}
+
+	return host + ":" + port, nil
+}
+
 // Connect establishes connection to the XMPP server
 func (c *Client) Connect() error {
 	if c.session != nil {
@@ -150,15 +228,38 @@ func (c *Client) Connect() error {
 		}
 	}
 
-	// Use DialClientSession for proper SASL authentication
-	c.session, err = xmpp.DialClientSession(
-		c.ctx,
+	// Create a timeout context for the connection attempt (30 seconds)
+	connectCtx, connectCancel := context.WithTimeout(c.ctx, 30*time.Second)
+	defer connectCancel()
+
+	c.logger.LogDebug("Connecting to XMPP server", "server_url", c.serverURL)
+
+	// Parse server address for direct connection
+	// We use this instead of using the JID for the user to avoid SRV lookups that can fail
+	// depending on network/dns configuration and to ensure we connect directly to the specified
+	// server.
+	serverAddr, err := c.parseServerAddress(c.serverURL)
+	if err != nil {
+		return fmt.Errorf("failed to parse server URL %s: %w", c.serverURL, err)
+	}
+
+	var d net.Dialer
+	conn, err := d.DialContext(connectCtx, "tcp", serverAddr)
+	if err != nil {
+		return fmt.Errorf("failed to dial XMPP server at %s: %w", serverAddr, err)
+	}
+
+	// Create client session with direct connection
+	c.session, err = xmpp.NewClientSession(
+		connectCtx,
 		c.jidAddr,
+		conn,
 		xmpp.StartTLS(tlsConfig),
 		xmpp.SASL("", c.password, sasl.Plain),
 		xmpp.BindResource(),
 	)
 	if err != nil {
+		conn.Close()
 		return fmt.Errorf("failed to establish XMPP session: %w", err)
 	}
 
@@ -171,9 +272,12 @@ func (c *Client) Connect() error {
 		if !c.sessionServing {
 			return fmt.Errorf("failed to start session serving")
 		}
+		c.logger.LogInfo("XMPP client connected successfully", "jid", c.jidAddr.String())
 		return nil
-	case <-time.After(5 * time.Second):
+	case <-time.After(10 * time.Second):
 		return fmt.Errorf("timeout waiting for session to be ready")
+	case <-c.ctx.Done():
+		return fmt.Errorf("connection cancelled: %w", c.ctx.Err())
 	}
 }
 
@@ -206,18 +310,47 @@ func (c *Client) serveSession() {
 
 // Disconnect closes the XMPP connection
 func (c *Client) Disconnect() error {
-	if c.session != nil {
-		err := c.session.Close()
+	if c.session == nil {
+		return nil // Already disconnected
+	}
+
+	c.logger.LogInfo("Disconnecting XMPP client", "jid", c.jidAddr.String())
+
+	// Send offline presence before disconnecting to properly leave rooms
+	if err := c.SetOfflinePresence(); err != nil {
+		c.logger.LogWarn("Failed to set offline presence before disconnect", "error", err)
+		// Don't fail the disconnect for presence issues
+	}
+
+	// Close the session with a timeout to prevent hanging
+	sessionCloseCtx, cancel := context.WithTimeout(context.Background(), defaultOperationTimeout)
+	defer cancel()
+
+	sessionCloseDone := make(chan error, 1)
+	go func() {
+		sessionCloseDone <- c.session.Close()
+	}()
+
+	select {
+	case err := <-sessionCloseDone:
 		c.session = nil
 		if err != nil {
+			c.logger.LogWarn("Error closing XMPP session", "error", err)
 			return fmt.Errorf("failed to close XMPP session: %w", err)
 		}
+	case <-sessionCloseCtx.Done():
+		c.logger.LogWarn("Timeout closing XMPP session, forcing disconnect")
+		c.session = nil
+		// Continue with cleanup even on timeout
 	}
 
-	if c.cancel != nil {
-		c.cancel()
-	}
+	// Stop the TTL cache cleanup goroutine
+	c.dedupeCache.Stop()
 
+	// Cancel the client context
+	c.cancel()
+
+	c.logger.LogInfo("XMPP client disconnected successfully")
 	return nil
 }
 
@@ -418,6 +551,30 @@ func (c *Client) SetOnlinePresence() error {
 	return nil
 }
 
+// SetOfflinePresence sends an offline presence stanza to indicate the client is going offline
+func (c *Client) SetOfflinePresence() error {
+	if c.session == nil {
+		return fmt.Errorf("XMPP session not established")
+	}
+
+	// Create presence stanza indicating we're unavailable
+	presence := stanza.Presence{
+		Type: stanza.UnavailablePresence,
+		From: c.jidAddr,
+	}
+
+	// Create a context with timeout for the presence update
+	ctx, cancel := context.WithTimeout(context.Background(), defaultOperationTimeout)
+	defer cancel()
+
+	// Send the presence stanza
+	if err := c.session.Encode(ctx, presence); err != nil {
+		return fmt.Errorf("failed to send offline presence: %w", err)
+	}
+
+	return nil
+}
+
 // CheckRoomExists verifies if an XMPP room exists and is accessible using disco#info
 func (c *Client) CheckRoomExists(roomJID string) (bool, error) {
 	if c.session == nil {
@@ -535,3 +692,118 @@ func (c *Client) Ping() error {
 	c.logger.LogDebug("XMPP ping successful", "duration", duration)
 	return nil
 }
+
+// GetMessageChannel returns the channel for incoming messages (Bridge interface)
+func (c *Client) GetMessageChannel() <-chan *model.DirectionalMessage {
+	return c.incomingMessages
+}
+
+// handleIncomingMessage processes incoming XMPP message stanzas
+func (c *Client) handleIncomingMessage(msg stanza.Message, t xmlstream.TokenReadEncoder) error {
+	c.logger.LogDebug("Received XMPP message",
+		"from", msg.From.String(),
+		"to", msg.To.String(),
+		"type", fmt.Sprintf("%v", msg.Type))
+
+	// Only process groupchat messages for now (MUC messages from channels)
+	if msg.Type != stanza.GroupChatMessage {
+		c.logger.LogDebug("Ignoring non-groupchat message", "type", fmt.Sprintf("%v", msg.Type))
+		return nil
+	}
+
+	// Parse the message body from the token reader
+	var msgWithBody struct {
+		stanza.Message
+		Body string `xml:"body"`
+	}
+	msgWithBody.Message = msg
+
+	d := xml.NewTokenDecoder(t)
+	if err := d.DecodeElement(&msgWithBody, nil); err != nil {
+		c.logger.LogError("Failed to decode message body", "error", err)
+		return err
+	}
+
+	if msgWithBody.Body == "" {
+		c.logger.LogDebug("Message has no body, ignoring")
+		return nil
+	}
+
+	// Deduplicate messages using message ID and TTL cache
+	if msg.ID != "" {
+		// Check if this message ID is already in the cache (indicates duplicate)
+		if c.dedupeCache.Has(msg.ID) {
+			return nil
+		}
+
+		// Record this message in the cache with TTL
+		c.dedupeCache.Set(msg.ID, time.Now(), ttlcache.DefaultTTL)
+	}
+
+	// Extract channel and user information from JIDs
+	channelID, err := c.extractChannelID(msg.From)
+	if err != nil {
+		c.logger.LogError("Failed to extract channel ID from JID", "from", msg.From.String(), "error", err)
+		return nil
+	}
+
+	userID, userName := c.extractUserInfo(msg.From)
+
+	// Create BridgeMessage
+	bridgeMsg := &model.BridgeMessage{
+		SourceBridge:    "xmpp",
+		SourceChannelID: channelID,
+		SourceUserID:    userID,
+		SourceUserName:  userName,
+		Content:         msgWithBody.Body, // Already Markdown compatible
+		MessageType:     "text",
+		Timestamp:       time.Now(), // XMPP doesn't always provide timestamps
+		MessageID:       msg.ID,
+		TargetBridges:   []string{}, // Will be routed to all other bridges
+		Metadata: map[string]any{
+			"xmpp_from": msg.From.String(),
+			"xmpp_to":   msg.To.String(),
+		},
+	}
+
+	// Wrap in directional message
+	directionalMsg := &model.DirectionalMessage{
+		BridgeMessage: bridgeMsg,
+		Direction:     model.DirectionIncoming,
+	}
+
+	// Send to message channel (non-blocking)
+	select {
+	case c.incomingMessages <- directionalMsg:
+		// Message queued successfully
+	default:
+		c.logger.LogWarn("Message channel full, dropping message",
+			"channel_id", channelID,
+			"user_id", userID)
+	}
+
+	return nil
+}
+
+// extractChannelID extracts the channel ID (room bare JID) from a message JID
+func (c *Client) extractChannelID(from jid.JID) (string, error) {
+	// For MUC messages, the channel ID is the bare JID (without resource/nickname)
+	return from.Bare().String(), nil
+}
+
+// extractUserInfo extracts user ID and display name from a message JID
+func (c *Client) extractUserInfo(from jid.JID) (string, string) {
+	// For MUC messages, the resource part is the nickname
+	nickname := from.Resourcepart()
+
+	// Use the full JID as user ID for XMPP
+	userID := from.String()
+
+	// Use nickname as display name if available, otherwise use full JID
+	displayName := nickname
+	if displayName == "" {
+		displayName = from.String()
+	}
+
+	return userID, displayName
+}