Added attachment support

src/app/chat/elements/message-box/message-box-viewmodel.ts

@@ -1,11 +1,21 @@
 import {signal} from '@angular/core';
+import {FileData} from '@chatenium/chatenium-sdk/domain/fileUploadService.schema';
+import {FileDataWithPreview} from './message-box';
 
 export class MessageBoxViewModel {
-  onMessageSend: (message: string) => void
+  onMessageSend: (message: string, files: FileDataWithPreview[] | null) => void
 
-  constructor(onMessageSend: (message: string) => void) {
+  constructor(onMessageSend: (message: string, files: FileDataWithPreview[] | null) => void) {
     this.onMessageSend = onMessageSend
   }
 
   message = signal<string>("")
+  files = signal<FileDataWithPreview[]>([])
+
+  get dialogOpen() {
+    return this.files().length != 0
+  }
+  set dialogOpen(value: boolean) {
+    this.files.set([])
+  }
 }