nycJSorg/angular-presentation

import { AngularFireAction, DatabaseSnapshot } from '@angular/fire/database';

export enum SyncStatus {
  OFF = 'off',
  VIEWING = 'viewing',
  PRESENTING = 'presenting',
  ADMIN = 'admin'
}

export const canWritePresenterData = status =>
  status === SyncStatus.PRESENTING || status === SyncStatus.ADMIN;

export function firebaseToValuesWithKey<T>(
  list: AngularFireAction<DatabaseSnapshot<T>>[]
) {
  return list.map(action => ({ key: action.key, ...action.payload.val() }));
}

export function toValuesAndKeys<T>(object: {
  [k: string]: T;
}): Array<{ key: string; value: T }> {
  return Object.entries(object).map(([key, value]) => ({ key, value }));
}

export function sum(array) {
  return array.reduce((a, b) => a + b, 0);
}