[FirebaseAI] Multimodal Attachment Preview Fix (#1814)

* add preView for MultimodalAttachment

* add extension View for MultimodalAttachment

Author: YoungHypo

firebaseai/FirebaseAIExample/Features/Multimodal/Models/MultimodalAttachment.swift

@@ -72,17 +72,23 @@ public struct MultimodalAttachment: Attachment, Equatable {
   }
 }
 
+extension MultimodalAttachment: View {
+  public var body: some View {
+    AttachmentPreviewCard(attachment: self)
+  }
+}
+
 // validate file type & mime type
 extension MultimodalAttachment {
   public static let supportedFileExtensions: Set<String> = [
-    // Documents / text
-    "pdf", "txt", "text",
     // Images
-    "jpg", "jpeg", "png", "webp",
+    "png", "jpeg", "webp",
     // Video
-    "flv", "mov", "qt", "mpeg", "mpg", "ps", "mp4", "webm", "wmv", "3gp", "3gpp",
+    "flv", "mov", "mpeg", "mpegps", "mpg", "mp4", "webm", "wmv", "3gpp",
     // Audio
-    "aac", "flac", "mp3", "m4a", "mpga", "mp4a", "opus", "pcm", "raw", "wav", "weba",
+    "aac", "flac", "mp3", "mpa", "mpeg", "mpga", "mp4", "opus", "pcm", "wav", "webm",
+    // Documents
+    "pdf", "txt",
   ]
 
   public static func validateFileType(url: URL) throws {
@@ -209,38 +215,32 @@ extension MultimodalAttachment {
     let fileExtension = url.pathExtension.lowercased()
 
     switch fileExtension {
-    // Documents / text
-    case "pdf":
-      return "application/pdf"
-    case "txt", "text":
-      return "text/plain"
-
     // Images
-    case "jpg", "jpeg":
-      return "image/jpeg"
     case "png":
       return "image/png"
+    case "jpeg":
+      return "image/jpeg"
     case "webp":
       return "image/webp"
 
     // Video
     case "flv":
       return "video/x-flv"
-    case "mov", "qt":
+    case "mov":
       return "video/quicktime"
     case "mpeg":
       return "video/mpeg"
+    case "mpegps":
+      return "video/mpegps"
     case "mpg":
       return "video/mpg"
-    case "ps":
-      return "video/mpegps"
     case "mp4":
       return "video/mp4"
     case "webm":
       return "video/webm"
     case "wmv":
       return "video/wmv"
-    case "3gp", "3gpp":
+    case "3gpp":
       return "video/3gpp"
 
     // Audio
@@ -249,22 +249,28 @@ extension MultimodalAttachment {
     case "flac":
       return "audio/flac"
     case "mp3":
-      return "audio/mpeg"
-    case "m4a":
+      return "audio/mp3"
+    case "mpa":
       return "audio/m4a"
+    case "mpeg":
+      return "audio/mpeg"
     case "mpga":
       return "audio/mpga"
-    case "mp4a":
+    case "mp4":
       return "audio/mp4"
     case "opus":
       return "audio/opus"
-    case "pcm", "raw":
-      return "audio/pcm"
     case "wav":
       return "audio/wav"
-    case "weba":
+    case "webm":
       return "audio/webm"
 
+    // Documents / text
+    case "pdf":
+      return "application/pdf"
+    case "txt":
+      return "text/plain"
+
     default:
       return "application/octet-stream"
     }

firebaseai/FirebaseAIExample/Features/Multimodal/Views/AttachmentPreviewCard.swift

@@ -59,7 +59,6 @@ private enum AttachmentType: String {
 
 struct AttachmentPreviewCard: View {
   let attachment: MultimodalAttachment
-  let onRemove: (() -> Void)?
 
   private var attachmentType: AttachmentType {
     AttachmentType(mimeType: attachment.mimeType)
@@ -93,16 +92,8 @@ struct AttachmentPreviewCard: View {
           Spacer()
         }
       }
-
-      if let onRemove = onRemove {
-        Button(action: onRemove) {
-          Image(systemName: "xmark.circle.fill")
-            .font(.system(size: 16))
-            .foregroundColor(.gray)
-        }
-        .buttonStyle(PlainButtonStyle())
-      }
     }
+    .frame(width: 180)
     .padding(12)
     .background(Color(.systemGray6))
     .clipShape(RoundedRectangle(cornerRadius: 12))
@@ -127,23 +118,19 @@ struct AttachmentPreviewCard: View {
 
 struct AttachmentPreviewScrollView: View {
   let attachments: [MultimodalAttachment]
-  var onAttachmentRemove: ((MultimodalAttachment) -> Void)? = nil
 
   var body: some View {
     if !attachments.isEmpty {
       ScrollView(.horizontal, showsIndicators: false) {
-        LazyHStack(spacing: 8) {
+        HStack {
           ForEach(attachments) { attachment in
             AttachmentPreviewCard(
               attachment: attachment,
-              onRemove: onAttachmentRemove == nil ? nil : { onAttachmentRemove?(attachment) }
             )
-            .frame(width: 180)
           }
         }
-        .padding(.horizontal, 16)
+        .padding(.horizontal, 8)
       }
-      .frame(height: 80)
     } else {
       EmptyView()
     }
@@ -157,31 +144,27 @@ struct AttachmentPreviewScrollView: View {
         mimeType: "image/jpeg",
         data: Data()
       ),
-      onRemove: { print("Image removed") }
     )
 
     AttachmentPreviewCard(
       attachment: MultimodalAttachment(
         mimeType: "application/pdf",
         data: Data()
       ),
-      onRemove: { print("PDF removed") }
     )
 
     AttachmentPreviewCard(
       attachment: MultimodalAttachment(
         mimeType: "video/mp4",
         data: Data()
       ),
-      onRemove: { print("Video removed") }
     )
 
     AttachmentPreviewCard(
       attachment: MultimodalAttachment(
         mimeType: "audio/mpeg",
         data: Data()
       ),
-      onRemove: { print("Audio removed") }
     )
   }
   .padding()