lbry-desktop/src/renderer/redux/selectors/app.js

import { createSelector } from 'reselect';

export const selectState = state => state.app || {};

export const selectPlatform = createSelector(selectState, state => state.platform);

export const selectUpdateUrl = createSelector(selectPlatform, platform => {
  switch (platform) {
    case 'darwin':
      return 'https://lbry.io/get/lbry.dmg';
    case 'linux':
      return 'https://lbry.io/get/lbry.deb';
    case 'win32':
      return 'https://lbry.io/get/lbry.exe';
    default:
      throw Error('Unknown platform');
  }
});

export const selectRemoteVersion = createSelector(selectState, state => state.remoteVersion);

export const selectIsUpgradeAvailable = createSelector(
  selectState,
  state => state.isUpgradeAvailable
);

export const selectUpgradeFilename = createSelector(
  selectPlatform,
  selectRemoteVersion,
  (platform, version) => {
    switch (platform) {
      case 'darwin':
        return `LBRY_${version}.dmg`;
      case 'linux':
        return `LBRY_${version}_amd64.deb`;
      case 'win32':
        return `LBRY_${version}.exe`;
      default:
        throw Error('Unknown platform');
    }
  }
);

export const selectCurrentModal = createSelector(selectState, state => state.modal);

export const selectDownloadProgress = createSelector(selectState, state => state.downloadProgress);

export const selectDownloadComplete = createSelector(
  selectState,
  state => state.upgradeDownloadCompleted
);

export const selectIsUpgradeSkipped = createSelector(selectState, state => state.isUpgradeSkipped);

export const selectUpgradeDownloadPath = createSelector(selectState, state => state.downloadPath);

export const selectUpgradeDownloadItem = createSelector(selectState, state => state.downloadItem);

export const selectModalProps = createSelector(selectState, state => state.modalProps);

export const selectDaemonVersionMatched = createSelector(
  selectState,
  state => state.daemonVersionMatched
);

export const selectSnackBar = createSelector(selectState, state => state.snackBar || {});

export const selectSnackBarSnacks = createSelector(
  selectSnackBar,
  snackBar => snackBar.snacks || []
);

export const selectBadgeNumber = createSelector(selectState, state => state.badgeNumber);

export const selectCurrentLanguage = createSelector(
  selectState,
  () => app.i18n.getLocale() || 'en'
);

export const selectVolume = createSelector(selectState, state => state.volume);