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path: root/gui/src/renderer/lib/constraint-updater.ts
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import { useCallback } from 'react';

import {
  IOpenVpnConstraints,
  IRelaySettingsNormal,
  IWireguardConstraints,
  Ownership,
  wrapConstraint,
} from '../../shared/daemon-rpc-types';
import { useAppContext } from '../context';
import { NormalRelaySettingsRedux } from '../redux/settings/reducers';
import { useNormalRelaySettings } from './utilityHooks';

export function wrapRelaySettingsOrDefault(
  relaySettings?: NormalRelaySettingsRedux,
): IRelaySettingsNormal<IOpenVpnConstraints, IWireguardConstraints> {
  if (relaySettings) {
    const openvpnPort = wrapConstraint(relaySettings.openvpn.port);
    const openvpnProtocol = wrapConstraint(relaySettings.openvpn.protocol);
    const wgPort = wrapConstraint(relaySettings.wireguard.port);
    const wgIpVersion = wrapConstraint(relaySettings.wireguard.ipVersion);
    const wgEntryLocation = wrapConstraint(relaySettings.wireguard.entryLocation);
    const location = wrapConstraint(relaySettings.location);
    const tunnelProtocol = wrapConstraint(relaySettings.tunnelProtocol);

    return {
      providers: [...relaySettings.providers],
      ownership: relaySettings.ownership,
      tunnelProtocol,
      openvpnConstraints: {
        port: openvpnPort,
        protocol: openvpnProtocol,
      },
      wireguardConstraints: {
        port: wgPort,
        ipVersion: wgIpVersion,
        useMultihop: relaySettings.wireguard.useMultihop,
        entryLocation: wgEntryLocation,
      },
      location,
    };
  }

  return {
    location: 'any',
    tunnelProtocol: 'any',
    providers: [],
    ownership: Ownership.any,
    openvpnConstraints: {
      port: 'any',
      protocol: 'any',
    },
    wireguardConstraints: {
      port: 'any',
      ipVersion: 'any',
      useMultihop: false,
      entryLocation: 'any',
    },
  };
}

type UpdateFunction = (
  settings: IRelaySettingsNormal<IOpenVpnConstraints, IWireguardConstraints>,
) => IRelaySettingsNormal<IOpenVpnConstraints, IWireguardConstraints>;

export function useRelaySettingsModifier() {
  const relaySettings = useNormalRelaySettings();

  return useCallback(
    (fn: UpdateFunction) => {
      const settings = wrapRelaySettingsOrDefault(relaySettings);
      return fn(settings);
    },
    [relaySettings],
  );
}

export function useRelaySettingsUpdater() {
  const { setRelaySettings } = useAppContext();
  const modifyRelaySettings = useRelaySettingsModifier();

  return useCallback(
    async (fn: UpdateFunction) => {
      const modifiedSettings = modifyRelaySettings(fn);
      await setRelaySettings({ normal: modifiedSettings });
    },
    [setRelaySettings, modifyRelaySettings],
  );
}