app.component.ts

import { Component, OnInit } from '@angular/core';
import { AppService } from './app.service';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.scss'],
})
export class AppComponent implements OnInit {
  currency = '';
  currencies;
  tickCount = 0;
  pipDiff = 0;
  buyOrSell = '';
  ticker = 0;
  movavg = 0;
  webSocket;
  averages;

  constructor(private appService: AppService) {}

  ngOnInit(): void {
    this.appService.getCcyPair().subscribe((data: Array<any>) => {
      this.currencies = data.map((d) => d['currency_name']);
      this.currency = this.currencies[0];
    });
  }
  
    handleSubmit() {
    this.wsSend({
      currencyPair: this.currency,
    });
  }

  wsSend(message) {
    if (this.webSocket) {
      this.webSocket.close();
    }
    this.averages = [];
    const messageValue = JSON.stringify(message);
    this.webSocket = this.initializeWS(messageValue);
  }
}