Authors code elegance example for review

component.ts

class AuthorsComponent implements OnInit, OnDestroy {

  authorsForm: FormGroup;
  authorsFormArray: FormArray;

  getAuthorFormField(person?: EntryAuthorRoleViewModel, mainAuthorId?: number) {
    return this.fb.group({
      name: new FormControl(person.author || '', Validators.required),
      role: new FormControl(person.authorRole || '', Validators.required),
      isMain: new FormControl(mainAuthorId === person.authorId || false, Validators.required)
    });
  }
  
  ngOnInit() {

    // Initialise form structure
    this.authorsForm = this.fb.group({
      authors: this.fb.array([])
    });

    // Save authors form array reference to variable
    this.authorsFormArray = this.authorsForm.get('authors') as FormArray;

    // Add new subscribe
    this.subscriptions.add(
      // Subscribe on loading authors data
      this.entryLoader.loadAuthorsData(this.entryId).subscribe(
        ({ entryAuthorRoleList, mainAuthorId }: EntryAuthorRoleListViewModel) => {
          // Iterate on authors to fill empty form
          entryAuthorRoleList.map( person => {
            // Add author field to empty form
            this.authorsFormArray.push(this.getAuthorFormField(person, mainAuthorId));
          });
      })
    );
    
  }
  
}