Use matdialog to copy roomId into content-creator-component

src/app/content-creation/content-creation.component.html

-<form (ngSubmit)="addContent(subjectTitle.value, bodyText.value, contentRound.value)">
+<form (ngSubmit)="addContent(subjectTitle.value, bodyText.value)">
   <div fxLayout="column" fxLayoutAlign="center" fxLayoutGap="10px">
     <mat-form-field>
       <input class="input-block" #subjectTitle matInput (keypress)="resetEmptyInputs()" placeholder="Subject" [(ngModel)]="subject"
@@ -7,10 +7,6 @@
         <mat-icon>close</mat-icon>
       </button>
     </mat-form-field>
-    <mat-form-field>
-    <input class="input-block" #contentRound matInput (keypress)="resetEmptyInputs()" placeholder="Round" [(ngModel)]="round"
-    name="Round">
-  </mat-form-field>
     <mat-form-field>
       <textarea #bodyText matInput matTextareaAutosize matAutosizeMinRows="3" matAutosizeMaxRows="8" (keypress)="resetEmptyInputs()"
         placeholder="Body" [(ngModel)]="body" name="Text"></textarea>

src/app/content-creation/content-creation.component.ts

@@ -14,15 +14,15 @@ import { RoomComponent } from '../room/room.component';
 export class ContentCreationComponent implements OnInit {
   subject: string;
   body: string;
+  roomId: string;
   emptyInputs = false;
-  
-  constructor(
-    private contentService: ContentService,
-    private router: Router,
-    private notification: NotificationService,
-    public dialogRef: MatDialogRef<RoomComponent>,
-    @Inject(MAT_DIALOG_DATA) public data: any
-  ) { }
+
+  constructor(private contentService: ContentService,
+              private router: Router,
+              private notification: NotificationService,
+              public dialogRef: MatDialogRef<RoomComponent>,
+              @Inject(MAT_DIALOG_DATA) public data: any) {
+  }
 
   onNoClick(): void {
     this.dialogRef.close();
@@ -42,7 +42,7 @@ export class ContentCreationComponent implements OnInit {
       this.emptyInputs = true;
       return;
     }
-    this.contentService.addContent({ subject: subject, body: body } as Content)
+    this.contentService.addContent({ subject: subject, body: body, roomId: this.roomId } as Content)
       .subscribe(content => {
         this.notification.show(`Content '${content.subject}' successfully created.`);
         this.router.navigate([`/creator/room/${content.roomId}/${content.id}`]);

src/app/creator-room/creator-room.component.ts

@@ -62,9 +62,10 @@ export class CreatorRoomComponent extends RoomComponent implements OnInit {
   }
 
   createContentDialog(): void {
-    this.dialog.open(ContentCreationComponent, {
+    const dialogRef = this.dialog.open(ContentCreationComponent, {
       width: '350px'
     });
+    dialogRef.componentInstance.roomId = this.room.id;
   }
 
   confirmDeletion(dialogAnswer: string): void {