Enabled injecting view model in the message composer

Author: martinmitrevski

Sources/StreamChatSwiftUI/ChatChannel/Composer/ComposerModels.swift

@@ -25,6 +25,20 @@ public struct AddedAsset: Identifiable, Equatable {
     public let url: URL
     public let type: AssetType
     public var extraData: [String: Any] = [:]
+    
+    public init(
+        image: UIImage,
+        id: String,
+        url: URL,
+        type: AssetType,
+        extraData: [String: Any] = [:]
+    ) {
+        self.image = image
+        self.id = id
+        self.url = url
+        self.type = type
+        self.extraData = extraData
+    }
 }
 
 /// Type of asset added to the composer.

Sources/StreamChatSwiftUI/ChatChannel/Composer/MessageComposerView.swift

@@ -21,6 +21,7 @@ public struct MessageComposerView<Factory: ViewFactory>: View, KeyboardReadable
 
     public init(
         viewFactory: Factory,
+        viewModel: MessageComposerViewModel? = nil,
         channelController: ChatChannelController,
         messageController: ChatMessageController?,
         quotedMessage: Binding<ChatMessage?>,
@@ -30,7 +31,7 @@ public struct MessageComposerView<Factory: ViewFactory>: View, KeyboardReadable
         factory = viewFactory
         channelConfig = channelController.channel?.config
         _viewModel = StateObject(
-            wrappedValue: ViewModelsFactory.makeMessageComposerViewModel(
+            wrappedValue: viewModel ?? ViewModelsFactory.makeMessageComposerViewModel(
                 with: channelController,
                 messageController: messageController
             )