Fixed crash when sending invalid chat command

Author: martinmitrevski

CHANGELOG.md

@@ -8,6 +8,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ### 🐞 Fixed
 - Memory cache trimming on chat dismiss
+- Crash when sending an invalid command
 
 # [4.16.0](https://github.com/GetStream/stream-chat-swiftui/releases/tag/4.16.0)
 _June 10, 2022_

Sources/StreamChatSwiftUI/ChatChannel/Composer/MessageComposerViewModel.swift

@@ -177,7 +177,7 @@ open class MessageComposerViewModel: ObservableObject {
             checkChannelCooldown()
         }
 
-        if let composerCommand = composerCommand {
+        if let composerCommand = composerCommand, composerCommand.id != "instantCommands" {
             commandsHandler.executeOnMessageSent(
                 composerCommand: composerCommand
             ) { [weak self] _ in

Sources/StreamChatSwiftUI/ChatChannel/MessageList/MessageContainerView.swift

@@ -61,7 +61,7 @@ public struct MessageContainerView<Factory: ViewFactory>: View {
 
     public var body: some View {
         HStack(alignment: .bottom) {
-            if message.type == .system {
+            if message.type == .system || message.type == .error {
                 factory.makeSystemMessageView(message: message)
             } else {
                 if message.isSentByCurrentUser {