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/** |
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* A node application to start a X amount of scooters. |
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* Used to simulate a system of X scooters. |
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* scooter.js will load .env file |
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* This will later be removed, since docker will handle loading environment variables |
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* Environment variables: |
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* DBURI |
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* NUMBER_OF_SCOOTERS |
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*/ |
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const { Scooter } = require("./scooter"); |
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const db = require("./modules/sparkdb"); |
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const numberOfScooters = process.env.NUMBER_OF_SCOOTERS; |
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let scooters = []; |
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/** |
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* Loads x number of scooters and returns them |
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* @return list of scooter |
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*/ |
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async function loadNewScooters() { |
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const scooterArray = []; |
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for (let i = 0; i < numberOfScooters; i++) { |
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const scooter = new Scooter(removeScooter); |
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await scooter.load(); // Load up new scooter, can pass id if custom generation is wanted |
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scooterArray.push(scooter); |
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} |
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return scooterArray; |
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} |
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/** |
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* @param mixed scooterArray |
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* |
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* @return [type] |
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*/ |
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async function startUpdateScooters() { |
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scooters.forEach(scooter => { |
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scooter.update(); |
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}); |
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} |
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/** |
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* Prints useful information about the current state of the scooters |
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* @param mixed scooters |
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* @param bool repeat |
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* |
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* @return [type] |
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*/ |
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async function printScooters(repeat) { |
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const totalScooters = scooters.length; |
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const scootersStateCount = {}; |
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for (let i = 0; i < totalScooters; i++) { |
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const scooter = scooters[i]; |
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// console.log(scooter); |
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scootersStateCount[scooter.status] = scootersStateCount[scooter.status] ? scootersStateCount[scooter.status] + 1 : 1; |
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} |
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for (const state in scootersStateCount) { |
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console.log(state, scootersStateCount[state]); |
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} |
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console.log("============================"); |
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if (repeat) { |
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setTimeout(() => printScooters(repeat), 5000); |
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} |
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} |
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/** |
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* @param string id |
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* |
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* @return void |
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*/ |
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function removeScooter(id) { |
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let index = -1; |
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for (let i = 0; i < scooters.length; i++) { |
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if (id === scooters[i]._id.toString()) { |
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index = i; |
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break; |
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} |
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} |
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if (index !== -1) { |
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console.log(`${scooters[index].name}: removed from database`); |
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scooters.splice(index, 1); |
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} |
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} |
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/** |
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* @param string id |
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* |
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* @return [type] |
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*/ |
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async function newScooterCallback(id) { |
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const scooter = new Scooter(removeScooter); |
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await scooter.load(id); |
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scooter.update(); |
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scooters.push(scooter); |
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} |
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/** |
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* @return void |
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*/ |
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async function watchForInsert() { |
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const dbScooters = await db.getAllScooters(); |
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const newScooters = dbScooters.filter(newScooter => { |
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for (let i = 0; i < scooters.length; i++) { |
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const oldScooter = scooters[i]; |
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if (oldScooter._id.toString() === newScooter._id.toString()) { |
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return false; |
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} |
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} |
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return true; |
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}) |
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for (let i = 0; i < newScooters.length; i++) { |
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const scooter = new Scooter(removeScooter); |
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await scooter.load(newScooters[i]._id.toString()); |
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console.log("New scooter added:", scooter._id.toString()); |
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scooter.update(); |
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scooters.push(scooter); |
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} |
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setTimeout(watchForInsert, 20000); |
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} |
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122
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/** |
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* @return [type] |
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*/ |
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async function dropCallback() { |
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console.log("Loading up new scooters:", numberOfScooters); |
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const existingScooters = await db.getAllScooters(); |
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const oldScooters = []; |
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for (let i = 0; i < existingScooters.length; i++) { |
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const scooter = new Scooter(removeScooter); |
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await scooter.load(existingScooters[i]._id.toString()); |
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oldScooters.push(scooter); |
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} |
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scooters = await loadNewScooters(); |
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scooters = scooters.concat(oldScooters); |
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console.log("Starting scooters") |
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startUpdateScooters(); |
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watchForInsert(); |
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printScooters(true); |
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} |
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async function main() { |
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db.setMongoURI(process.env.DBURI); |
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db.connect(); |
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dropCallback(); |
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} |
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if (require.main === module) { |
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main(); |
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} |
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FalkenDev /
SparkRentals-Scooter-Simulator
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