Defining a JSON file interface in Angular to populate a dropdown box with dependencies

I've embarked on an exciting project to develop a cascading dropdown box filter, and it's proving to be quite challenging.

I'm taking it step by step to ensure clarity. I have obtained a JSON file containing the data required to populate dependent dropdown boxes.

{"data":
{"events":
{"type":"cart_update",
    "properties":
        [{"property":"product_id","type":"string"},
        {"property":"variant_id","type":"string"},
        {"property":"category_level_1","type":"string"},
        {"property":"category_level_2","type":"string"},
        {"property":"category_level_3","type":"string"},
        {"property":"product_list","type":"string"},
        {"property":"action","type":"string"}]},
{"type":"view_item",
    "properties":
        [{"property":"product_id","type":"string"},
        {"property":"variant_id","type":"string"},
        {"property":"category_level_1","type":"string"},
        {"property":"category_level_2","type":"string"},
        {"property":"category_level_3","type":"string"}]}]},"success":true}

To aid in navigating my JSON file effectively, I've created interfaces. Let me know if this is correct:

export interface DataInterface {
  events: Array<EventInterface>;
  success: boolean;
}
export interface EventInterface {
  type: string;
  properties: Array<PropsInterface>;
}

export interface PropsInterface{
  property: string;
  type:string;
}

@Injectable({
  providedIn: 'root'
})

export class DataService {

  constructor(private http: HttpClient) { }
     
  getData() {
    return this.http.get('./assets/data.json')   
  }
  }

The next challenge I face is how to populate dropdown boxes with the various event[type] and properties[property], as well as creating dependencies between them. Any suggestions?

angulartypescript

Answer №1

take a look at the edits made below

**export interface ResponseInterface {
  information: DataInterface;
}**
export interface DataInterface {
  eventsList: EventInterface[];
  successStatus: boolean;
}
export interface EventInterface {
  categoryType: string;
  details: PropsInterface[];
}

export interface PropsInterface{
  attribute: string;
  dataType:string;
}

@Injectable({
  providedIn: 'root'
})

export class DataService {
  // extracting relevant data from http request
  attributes: PropsInterface[] = this.getData().pipe(pluck("information", "eventsList", "details"));
  constructor(private http: HttpClient) { }
     
  getData() {
    return this.http.get***<ResponseInterface>***('./assets/data.json')   
  }
  }

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