Show error indicator when attachment max size exceeded

Author: martinmitrevski

Sources/StreamChatSwiftUI/ChatChannel/Composer/MessageComposerView.swift

@@ -81,6 +81,13 @@ public struct MessageComposerView<Factory: ViewFactory>: View, KeyboardReadable
                     shouldScroll: viewModel.inputComposerShouldScroll,
                     removeAttachmentWithId: viewModel.removeAttachment(with:)
                 )
+                .alert(isPresented: $viewModel.attachmentSizeExceeded) {
+                    Alert(
+                        title: Text(L10n.Attachment.MaxSize.title),
+                        message: Text(L10n.Attachment.MaxSize.message),
+                        dismissButton: .cancel(Text(L10n.Alert.Actions.ok))
+                    )
+                }
 
                 factory.makeTrailingComposerView(
                     enabled: viewModel.sendButtonEnabled,
@@ -95,6 +102,9 @@ public struct MessageComposerView<Factory: ViewFactory>: View, KeyboardReadable
                         onMessageSent()
                     }
                 }
+                .alert(isPresented: $viewModel.errorShown) {
+                    Alert.defaultErrorAlert
+                }
             }
             .padding(.all, 8)
 
@@ -169,9 +179,6 @@ public struct MessageComposerView<Factory: ViewFactory>: View, KeyboardReadable
             alignment: .bottom
         )
         .modifier(factory.makeComposerViewModifier())
-        .alert(isPresented: $viewModel.errorShown) {
-            Alert.defaultErrorAlert
-        }
         .onChange(of: editedMessage) { _ in
             viewModel.text = editedMessage?.text ?? ""
             if editedMessage != nil {

Sources/StreamChatSwiftUI/ChatChannel/Composer/MessageComposerViewModel.swift

@@ -123,6 +123,7 @@ open class MessageComposerViewModel: ObservableObject {
     @Published public var showReplyInChannel = false
     @Published public var suggestions = [String: Any]()
     @Published public var cooldownDuration: Int = 0
+    @Published public var attachmentSizeExceeded: Bool = false
 
     public let channelController: ChatChannelController
     public var messageController: ChatMessageController?
@@ -575,7 +576,9 @@ open class MessageComposerViewModel: ObservableObject {
 
         do {
             let fileSize = try AttachmentFile(url: url).size
-            return fileSize < chatClient.config.maxAttachmentSize
+            let canAdd = fileSize < chatClient.config.maxAttachmentSize
+            attachmentSizeExceeded = !canAdd
+            return canAdd
         } catch {
             return false
         }

Sources/StreamChatSwiftUI/Generated/L10n.swift

@@ -47,6 +47,12 @@ internal enum L10n {
   internal enum Attachment {
     /// Attachment size exceed the limit.
     internal static var maxSizeExceeded: String { L10n.tr("Localizable", "attachment.max-size-exceeded") }
+    internal enum MaxSize {
+      /// Please select a smaller attachment.
+      internal static var message: String { L10n.tr("Localizable", "attachment.max-size.message") }
+      /// Attachment size exceed the limit
+      internal static var title: String { L10n.tr("Localizable", "attachment.max-size.title") }
+    }
   }
 
   internal enum Channel {

Sources/StreamChatSwiftUI/Resources/en.lproj/Localizable.strings

@@ -93,6 +93,9 @@
 "composer.suggestions.commands.header" = "Instant Commands";
 "message.sending.attachment-uploading-failed" = "UPLOADING FAILED";
 
+"attachment.max-size.title" = "Attachment size exceed the limit";
+"attachment.max-size.message" = "Please select a smaller attachment.";
+
 "message.title.online" = "Online";
 "message.title.offline" = "Offline";
 "message.title.group" = "%d members, %d online";

StreamChatSwiftUITests/Tests/ChatChannel/MessageComposerViewModel_Tests.swift

@@ -485,9 +485,11 @@ class MessageComposerViewModel_Tests: StreamChatTestCase {
         // When
         let newAsset = defaultAsset
         viewModel.imageTapped(newAsset) // will not be added because of small max attachment size.
+        let alertShown = viewModel.attachmentSizeExceeded
 
         // Then
         XCTAssert(viewModel.addedAssets.isEmpty)
+        XCTAssert(alertShown == true)
     }
 
     func test_messageComposerVM_mentionUsers() {