Add additional guard statement

Author: jguz-pubnub

Sources/Entities/BaseChannel.swift

@@ -34,7 +34,7 @@ final class BaseChannel<C: PubNubChat.Channel_, M: PubNubChat.Message>: Channel
     channels: [BaseChannel],
     callback: @escaping (([BaseChannel]) -> Void)
   ) -> AutoCloseable {
-    guard let firstChat = channels.first?.chat else {
+    guard let firstChat = channels.first?.chat, channels.allSatisfy({ $0.chat === firstChat }) else {
       return AutoCloseableImpl.empty()
     }
     return AutoCloseableImpl(

Sources/Entities/BaseMessage.swift

@@ -53,7 +53,7 @@ extension BaseMessage: Message {
     messages: [BaseMessage],
     callback: @escaping (([BaseMessage]) -> Void)
   ) -> AutoCloseable {
-    guard let firstChat = messages.first?.chat else {
+    guard let firstChat = messages.first?.chat, messages.allSatisfy({ $0.chat === firstChat }) else {
       return AutoCloseableImpl.empty()
     }
     return AutoCloseableImpl(

Sources/Entities/ChannelImpl.swift

@@ -77,7 +77,7 @@ extension ChannelImpl: Channel {
     channels: [ChannelImpl],
     callback: @escaping (([ChannelImpl]) -> Void)
   ) -> AutoCloseable {
-    guard let firstChat = channels.first?.chat else {
+    guard let firstChat = channels.first?.chat, channels.allSatisfy({ $0.chat === firstChat }) else {
       return AutoCloseableImpl.empty()
     }
     return AutoCloseableImpl(

Sources/Entities/MembershipImpl.swift

@@ -70,7 +70,7 @@ extension MembershipImpl: Membership {
     memberships: [MembershipImpl],
     callback: @escaping (([MembershipImpl]) -> Void)
   ) -> AutoCloseable {
-    guard let firstChat = memberships.first?.chat else {
+    guard let firstChat = memberships.first?.chat, memberships.allSatisfy({ $0.chat === firstChat }) else {
       return AutoCloseableImpl.empty()
     }
     return AutoCloseableImpl(

Sources/Entities/MessageImpl.swift

@@ -85,7 +85,7 @@ extension MessageImpl: Message {
     messages: [MessageImpl],
     callback: @escaping (([MessageImpl]) -> Void)
   ) -> AutoCloseable {
-    guard let firstChat = messages.first?.chat else {
+    guard let firstChat = messages.first?.chat, messages.allSatisfy({ $0.chat === firstChat }) else {
       return AutoCloseableImpl.empty()
     }
     return AutoCloseableImpl(

Sources/Entities/ThreadChannelImpl.swift

@@ -82,7 +82,7 @@ extension ThreadChannelImpl: ThreadChannel {
     channels: [ThreadChannelImpl],
     callback: @escaping (([ThreadChannelImpl]) -> Void)
   ) -> AutoCloseable {
-    guard let firstChat = channels.first?.chat else {
+    guard let firstChat = channels.first?.chat, channels.allSatisfy({ $0.chat === firstChat }) else {
       return AutoCloseableImpl.empty()
     }
     return AutoCloseableImpl(

Sources/Entities/ThreadMessageImpl.swift

@@ -94,7 +94,7 @@ extension ThreadMessageImpl: ThreadMessage {
     messages: [ThreadMessageImpl],
     callback: @escaping (([ThreadMessageImpl]) -> Void)
   ) -> AutoCloseable {
-    guard let firstChat = messages.first?.chat else {
+    guard let firstChat = messages.first?.chat, messages.allSatisfy({ $0.chat === firstChat }) else {
       return AutoCloseableImpl.empty()
     }
     return AutoCloseableImpl(

Sources/Entities/UserImpl.swift

@@ -87,7 +87,7 @@ extension UserImpl: User {
   public var active: Bool { user.active }
 
   public static func streamUpdatesOn(users: [UserImpl], callback: @escaping (([UserImpl]) -> Void)) -> AutoCloseable {
-    guard let firstChat = users.first?.chat else {
+    guard let firstChat = users.first?.chat, users.allSatisfy({ $0.chat === firstChat }) else {
       return AutoCloseableImpl.empty()
     }
     return AutoCloseableImpl(