RTL/src/app/lnd/peers-channels/channels/close-channel-modal/close-channel.component.ts

import { Component, OnInit, Inject, OnDestroy } from '@angular/core';
import { MatDialogRef, MAT_DIALOG_DATA } from '@angular/material/dialog';
import { Subject } from 'rxjs';
import { filter, takeUntil } from 'rxjs/operators';
import { Store } from '@ngrx/store';
import { Actions } from '@ngrx/effects';
import { faExclamationTriangle, faInfoCircle } from '@fortawesome/free-solid-svg-icons';

import { LoggerService } from '../../../../shared/services/logger.service';
import { Channel } from '../../../../shared/models/lndModels';
import { ChannelInformation } from '../../../../shared/models/alertData';
import { APICallStatusEnum, LNDActions, TRANS_TYPES } from '../../../../shared/services/consts-enums-functions';

import { RTLState } from '../../../../store/rtl.state';
import { closeChannel } from '../../../store/lnd.actions';

@Component({
  selector: 'rtl-close-channel',
  templateUrl: './close-channel.component.html',
  styleUrls: ['./close-channel.component.scss']
})
export class CloseChannelComponent implements OnInit, OnDestroy {

  public channelToClose: Channel;
  public transTypes = TRANS_TYPES;
  public selTransType = '0';
  public blocks = null;
  public fees = null;
  public faExclamationTriangle = faExclamationTriangle;
  public faInfoCircle = faInfoCircle;
  public flgPendingHtlcs = false;
  public errorMsg = 'Please wait for pending HTLCs to settle before attempting channel closure.';
  private unSubs: Array<Subject<void>> = [new Subject(), new Subject()];

  constructor(public dialogRef: MatDialogRef<CloseChannelComponent>, @Inject(MAT_DIALOG_DATA) public data: ChannelInformation, private store: Store<RTLState>, private actions: Actions, private logger: LoggerService) { }

  ngOnInit() {
    this.channelToClose = this.data.channel;
    this.actions.pipe(
      takeUntil(this.unSubs[0]),
      filter((action) => action.type === LNDActions.UPDATE_API_CALL_STATUS_LND || action.type === LNDActions.SET_CHANNELS_LND)).
      subscribe((action: any) => {
        if (action.type === LNDActions.SET_CHANNELS_LND) {
          const filteredChannel = action.payload.find((channel) => channel.chan_id === this.data.channel.chan_id);
          if (filteredChannel && filteredChannel.pending_htlcs && filteredChannel.pending_htlcs.length && filteredChannel.pending_htlcs.length > 0) {
            this.flgPendingHtlcs = true;
          }
        }
        if (action.type === LNDActions.UPDATE_API_CALL_STATUS_LND && action.payload.status === APICallStatusEnum.ERROR && action.payload.action === 'FetchAllChannels') {
          this.logger.error('Fetching latest channel information failed!\n' + action.payload.message);
        }
      });
  }

  onCloseChannel(): boolean | void {
    if ((this.selTransType === '1' && (!this.blocks || this.blocks === 0)) || (this.selTransType === '2' && (!this.fees || this.fees === 0))) {
      return true;
    }
    const closeChannelParams: any = { channelPoint: this.channelToClose.channel_point, forcibly: !this.channelToClose.active };
    if (this.blocks) {
      closeChannelParams.targetConf = this.blocks;
    }
    if (this.fees) {
      closeChannelParams.satPerByte = this.fees;
    }
    this.store.dispatch(closeChannel({ payload: closeChannelParams }));
    this.dialogRef.close(false);
  }

  resetData() {
    this.selTransType = '0';
    this.blocks = null;
    this.fees = null;
  }

  onClose() {
    this.dialogRef.close(false);
  }

  ngOnDestroy() {
    this.unSubs.forEach((completeSub) => {
      completeSub.next(<any>null);
      completeSub.complete();
    });
  }

}