Fix breaking the TDlib data on graceful exit

telegram/client.go

@@ -44,6 +44,7 @@ type Client struct {
 	parameters   *client.TdlibParameters
 	logVerbosity client.Option
 	me           *client.User
+	listener     *client.Listener
 
 	xmpp    *xmpp.Component
 	jid     string
@@ -51,8 +52,7 @@ type Client struct {
 	content *config.TelegramContentConfig
 	cache   *cache
 
-	locks  clientLocks
+	locks clientLocks
-	online bool
 }
 
 type clientLocks struct {

telegram/connect.go

@@ -87,7 +87,7 @@ func (stateHandler *clientAuthorizer) Close() {
 
 // Connect starts TDlib connection
 func (c *Client) Connect() error {
-	if c.online {
+	if c.Online() {
 		return nil
 	}
 
@@ -113,8 +113,8 @@ func (c *Client) Connect() error {
 	}
 
 	c.client = tdlibClient
-	c.online = true
 	c.locks.authorizationReady.Done()
+	c.listener = tdlibClient.GetListener()
 
 	go c.updateHandler()
 
@@ -124,7 +124,7 @@ func (c *Client) Connect() error {
 // Disconnect drops TDlib connection
 func (c *Client) Disconnect() {
 	// already disconnected
-	if !c.online {
+	if !c.Online() {
 		return
 	}
 
@@ -140,14 +140,17 @@ func (c *Client) Disconnect() {
 		)
 	}
 
-	c.client.Destroy()
+	_, err := c.client.Close()
-	c.online = false
+	if err != nil {
+		log.Fatalf("Couldn't close the Telegram instance: %#v", c)
+	}
 }
 
 func (c *Client) interactor() {
 	for {
 		state, ok := <-c.authorizer.State
 		if !ok {
+			log.Error("Interactor is disconnected")
 			return
 		}
 
@@ -192,8 +195,14 @@ func (c *Client) interactor() {
 			}
 
 			gateway.SendPresence(c.xmpp, c.jid, gateway.SPStatus("Logged in "+c.Session.Login))
-
+		case client.TypeAuthorizationStateClosed:
-			return
+			log.Warn("Closing the updates listener")
+			c.listener.Close()
 		}
 	}
 }
+
+// Online checks if the updates listener is alive
+func (c *Client) Online() bool {
+	return c.listener != nil && c.listener.IsActive()
+}

telegram/utils.go

@@ -30,7 +30,7 @@ const newlineChar string = "\n"
 
 // GetContactByUsername resolves username to user id retrieves user and chat information
 func (c *Client) GetContactByUsername(username string) (*client.Chat, *client.User, error) {
-	if !c.online {
+	if !c.Online() {
 		return nil, nil, errOffline
 	}
 
@@ -47,7 +47,7 @@ func (c *Client) GetContactByUsername(username string) (*client.Chat, *client.Us
 
 // GetContactByID gets user and chat information from cache (or tries to retrieve it, if missing)
 func (c *Client) GetContactByID(id int64, chat *client.Chat) (*client.Chat, *client.User, error) {
-	if !c.online {
+	if !c.Online() {
 		return nil, nil, errOffline
 	}
 
@@ -130,7 +130,7 @@ func (c *Client) userStatusToText(status client.UserStatus) (string, string) {
 }
 
 func (c *Client) processStatusUpdate(chatID int64, status string, show string, args ...args.V) error {
-	if !c.online {
+	if !c.Online() {
 		return nil
 	}
 
@@ -432,7 +432,7 @@ func (c *Client) ProcessOutgoingMessage(chatID int64, text string, messageID int
 		}
 	}
 
-	if !c.online {
+	if !c.Online() {
 		// we're offline
 		return
 	}