firebase.js

import firebase from "firebase/app";
import "firebase/database";

export const withFirebase = comp => {
  comp.componentDidMount = () => {
    if (!firebase.apps.length) {
      firebase.initializeApp({
        apiKey: "",
        authDomain: "",
        databaseURL: "",
        projectId: "",
        appId: ""
      });
    }
  };
  return comp;
};

export const listenPath = (path, cb) => {
  const snapCb = snap => cb(snap.val());
  const ref = firebase.database().ref(path);
  ref.on("value", snapCb);
  return () => ref.off("value", snapCb);
};

export const setPath = (path, value) =>
  firebase
    .database()
    .ref(path)
    .set(value);

export const updatePath = (path, update) =>
  firebase
    .database()
    .ref(path)
    .update(update);

export const pushPath = (path, value) =>
  firebase
    .database()
    .ref(path)
    .push(value);

export const removePath = path =>
  firebase
    .database()
    .ref(path)
    .remove();