FbDbJsQuerying.js

// jshint esnext:true
// "use strict";
// esversion: 6 
 
// https://jsbin.com/yujazob/edit?js

// you can see the output in the console (cmd+opt+J)
var config = {
    apiKey: "AIzaSyBVF7jKRrkBl22S03aZy_77m0Q9edXccx8",
		authDomain: "treckerandroid.firebaseapp.com",
    databaseURL: "https://treckerandroid.firebaseio.com",
    projectId: "treckerandroid"
  };
firebase.initializeApp(config);

// for getPositions, getHearBeats
var tokenUuid = "78dbc159-a928-43ab-b734-2c0b68eb7027"
// for getPolylines, getHearBeats
var orderUuid = "e459f53a-36cc-4720-8c79-e2e18168ed3d"

function getUser() {
	console.log("getUser")
	
	firebase.database().ref().child("users")
		.limitToFirst(1)
		.once('value').then(function(snapshot) {
			snapshot.forEach(function(snapshot) {
				console.log(snapshot.val())
			})
	})
}

// path: positions/${token_uuid}/${fb_key}/
// index: orderId, time, epochTime, requestId
function getPositions() {
	console.log("getPositions")
	
	firebase.database().ref()
		.child("positions")
		.child(tokenUuid)
		.orderByChild("epochTime")
		.startAt(1602028800000)
		.endAt(1602201600000)
		.once('value').then(function(snapshot) {
			snapshot.forEach(function(snapshot) {
				console.log(snapshot.val())
			})
	})
}

// path: new_polys/${order_uuid}/${request_id}/
// index: toTime
function getPolylines() {
	console.log("getPolylines")
	
	firebase.database().ref()
		.child("new_polys")
		.child(orderUuid)
		.orderByChild("toTime")
// 		.startAt(1602028800000)
// 		.endAt(1602201600000)
// 		.limitToFirst(1)
		.once('value').then(function(snapshot) {
			snapshot.forEach(function(snapshot) {
				console.log(snapshot.val())
			})
	})
}

// path: heart_beat/${token_uuid}/${order_uuid}/
// index: none
function getHearBeats() {
	console.log("getHearBeats")
	
	firebase.database().ref()
		.child("heart_beat")
		.child(tokenUuid)
		.child(orderUuid)
// 		.orderByChild("fromTime")
// 		.startAt(1602028800000)
// 		.endAt(1602201600000)
// 		.limitToFirst(1)
		.once('value').then(function(snapshot) {
			snapshot.forEach(function(snapshot) {
				console.log(snapshot.val())
			})
	})
}

// getPositions()
// getPolylines()
getHearBeats()