mempool/frontend/src/app/components/difficulty-adjustments-table/difficulty-adjustments-table.components.ts

import { Component, Inject, LOCALE_ID, OnInit } from '@angular/core';
import { Observable } from 'rxjs';
import { map } from 'rxjs/operators';
import { ApiService } from '../../services/api.service';
import { formatNumber } from '@angular/common';
import { selectPowerOfTen } from '../../bitcoin.utils';
import { StateService } from '../../services/state.service';

@Component({
  selector: 'app-difficulty-adjustments-table',
  templateUrl: './difficulty-adjustments-table.component.html',
  styleUrls: ['./difficulty-adjustments-table.component.scss'],
  styles: [`
    .loadingGraphs {
      position: absolute;
      top: 50%;
      left: calc(50% - 15px);
      z-index: 100;
    }
  `],
})
export class DifficultyAdjustmentsTable implements OnInit {
  hashrateObservable$: Observable<any>;
  isLoading = true;
  formatNumber = formatNumber;

  constructor(
    @Inject(LOCALE_ID) public locale: string,
    private apiService: ApiService,
    public stateService: StateService
  ) {
  }

  ngOnInit(): void {
    let decimals = 2;
    if (this.stateService.network === 'signet') {
      decimals = 5;
    }

    this.hashrateObservable$ = this.apiService.getDifficultyAdjustments$('3m')
      .pipe(
        map((response) => {
          const data = response.body;
          const tableData = [];
          for (const adjustment of data) {
            const selectedPowerOfTen: any = selectPowerOfTen(adjustment[2]);
            tableData.push({
              height: adjustment[1],
              timestamp: adjustment[0],
              change: (adjustment[3] - 1) * 100,
              difficultyShorten: formatNumber(
                adjustment[2] / selectedPowerOfTen.divider,
                this.locale, `1.${decimals}-${decimals}`) + selectedPowerOfTen.unit
            });
          }
          this.isLoading = false;
          return tableData.slice(0, 6);
        }),
      );
  }

  isMobile() {
    return (window.innerWidth <= 767.98);
  }
}