Make message timestamps optional

src/app/message-types/message-metadata.ts

@@ -3,5 +3,5 @@
 
 export class MessageMetadata {
     originator: string;
-    timestamp: Date;
+    timestamp?: Date;
 }

src/app/messages/messages.component.ts

@@ -55,17 +55,24 @@ export class MessagesComponent implements OnInit {
     );
   }
 
-  writeMessage(data: MessagesMessage) {
-    data.message = this.convert(data.message);
-    this.messages.push(data);
+  writeMessage(message: MessagesMessage) {
+    this.transformMessage(message);
+    this.messages.push(message);
     this.changeDetectorRef.detectChanges();
   }
 
+  transformMessage(message: MessagesMessage) {
+    message.message = this.convertMarkdownToHTML(message.message);
+    if (!message.timestamp) {
+      message.timestamp = new Date();
+    }
+  }
+
   handleQueueMessage(data: MessageQueueMessage) {
     this.messageQueueAttender.queueMessages(data.messages);
   }
 
-  convert(text: string) {
+  convertMarkdownToHTML(text: string) {
     return this.markdownService.convertToHtml(text);
   }