Delete events.js, I don't need you anymore cause we have route (f08d3d64) · Commits · Dennis Willers / Voting

events.js

deleted100644 → 0

+0 −216

Original line number	Original line	Diff line number	Diff line
	const express = require('express');
	const fs = require('fs');

	function createRouter(db) {
	const router = express.Router();

	function isMapIdAndNameNotNull(req) {
	const mapId = req.body.mapId;
	const name = req.body.name;
	return mapId != null && name != null;
	}

	function isVoteRequestValid(req) {
	const userId = req.body.userId;
	const vote = req.body.vote;
	return userId != null && vote != null && isMapIdAndNameNotNull(req);
	}

	function isgetMapInfoValid(req) {
	const userId = req.body.userId;
	return userId != null && isMapIdAndNameNotNull(req);
	}

	const hasMap = function hasMap(req, res, next) {
	const mapId = req.body.mapId;
	if (isMapIdAndNameNotNull(req)) {
	const sql = 'SELECT count(*) as Maps From Map WHERE mapId = \"'+mapId+'\";';
	console.log('Map Select: ', sql);
	db.query(
	sql,
	(error, results) => {
	if (error) {
	console.log(error);
	res.status(500).json({status: 'error in hasMap'});
	} else {
	numberResults = results[0].Maps;
	if (numberResults === 1) next();
	else if (numberResults === 0) addMap(req, res, next);
	else res.status(500).json({status: 'There are multiple maps with the same id'});
	}
	});
	} else {
	res.status(500).json({status: 'JSON-Parameter are not valid'});
	}
	};

	const addMap = function addMap(req, res, next) {
	const mapId = req.body.mapId;
	const name = req.body.name;
	const sql = 'INSERT INTO Map (mapId, name) VALUES (\"'+mapId+'\", \"'+name+'\");';
	console.log('Map Insert: ', sql);
	db.query(
	sql,
	(error, results) => {
	if (error) {
	console.log(error);
	res.status(500).json({status: 'error in addMap'});
	} else {
	if (results.affectedRows === 1) next();
	else res.status(500).json({status: 'error in insertMap'});
	}
	});
	};

	const hasVote = function hasVote(req, res, next) {
	if (isVoteRequestValid(req)) {
	const userId = req.body.userId;
	const mapId = req.body.mapId;
	const sql = 'SELECT userId FROM Vote WHERE userId = \"'+ userId + '\" AND mapId = \"' + mapId + '\";';
	console.log('Map Insert: ', sql);
	db.query(
	sql,
	(error, results) => {
	if (error) {
	console.log(error);
	res.status(500).json({status: 'error in hasVote'});
	} else {
	if (results.length === 0) insertVote(req, res, next);
	else if (results.length === 1) updateVote(req, res, next);
	else res.status(500).json({status: 'too many votes by user'});
	}
	});
	} else {
	res.status(500).json({status: 'Vote Request is not valid'});
	}
	};

	const insertVote = function insertVote(req, res, next) {
	if (isVoteRequestValid(req)) {
	const userId = req.body.userId;
	const mapId = req.body.mapId;
	const vote = req.body.vote;
	const sql = 'INSERT INTO Vote (userId, mapId, vote) VALUES (\"'+ userId + '\", \"'+ mapId + '\", \"' + vote +'\");';
	console.log('Insert Vote: ', sql);
	db.query(
	sql,
	(error, results) => {
	if (error) {
	console.log(error);
	res.status(500).json({status: 'error in insertVote'});
	} else {
	if (results.affectedRows === 1) next();
	else res.status(500).json({status: 'error in insertVote'});
	}
	});
	} else {
	res.status(500).json({status: 'Vote Request is not valid'});
	}
	};

	const updateVote = function updateVote(req, res, next) {
	if (isVoteRequestValid(req)) {
	const userId = req.body.userId;
	const mapId = req.body.mapId;
	const vote = req.body.vote;
	const sql = 'UPDATE Vote SET userId = \"'+ userId + '\", mapId = \"'+ mapId + '\", vote = \"' + vote +'\" WHERE userID = \"'+ userId +'\" AND mapId = \"' + mapId + '\";';
	console.log('Update Vote: ', sql);
	db.query(
	sql,
	(error, results) => {
	if (error) {
	console.log(error);
	res.status(500).json({status: 'error in updateVote'});
	} else {
	if (results.affectedRows === 1) next();
	else res.status(500).json({status: 'error in updateVote'});
	}
	});
	} else {
	res.status(500).json({status: 'Vote Request is not valid'});
	}
	};

	const getMapInfo = function getMapInfo(req, res) {
	if (isVoteRequestValid(req)) {
	const mapId = req.body.mapId;
	const vote = req.body.vote;
	const sql = 'SELECT count(userId) as votes, round(avg(vote)) as average FROM Vote WHERE mapId LIKE \"'+ mapId + '\";';
	console.log('getMapInfo: ', sql);
	db.query(
	sql,
	(error, results) => {
	if (error) {
	console.log(error);
	res.status(500).json({status: 'error in getMapInfo'});
	} else {
	if (results.length === 1) {
	let average = results[0].average;
	let votes = results[0].votes;
	if (!average) average = 0;
	if (!votes) votes = 0;
	res.json({votes: votes, average: average, vote: vote});
	return;
	}
	res.status(500).json({status: 'unexpected result in getMapInfo'});
	}
	});
	} else {
	res.status(500).json({status: 'Vote Request is not valid'});
	}
	};

	const getVote = function getVote(req, res) {
	if (isgetMapInfoValid(req)) {
	const mapId = req.body.mapId;
	const userId = req.body.userId;
	const sql = 'SELECT vote FROM Vote WHERE mapId LIKE \"'+ mapId + '\" AND userId LIKE \"' + userId + '\";';
	console.log('Update Vote: ', sql);
	db.query(
	sql,
	(error, results) => {
	if (error) {
	console.log(error);
	res.status(500).json({status: 'error in getVote'});
	} else {
	if (results.length < 2) {
	let vote = -1;
	if (results.length === 1) {
	vote = results[0].vote;
	}
	if (!isNaN(vote)) {
	req.body.vote = vote;
	getMapInfo(req, res);
	return;
	}
	res.status(500).json({status: 'unexpected result in getVote'});
	} else {
	res.status(500).json({status: 'too many results in getVote'});
	}
	}
	});
	} else {
	res.status(500).json({status: 'Vote Request is not valid'});
	}
	};

	// the routes are defined here
	fs.readdir('./route', (err, files) => {
	if (err) {
	console.error(err);
	} else {
	files.forEach(file => {
	if (file.endsWith('.js')) {
	require('./route/' + file)(router);
	}
	});
	}
	});

	router.post('/setVote', [hasMap, hasVote, getMapInfo]);
	router.post('/getMapInfo', [hasMap, getVote]);

	return router;
	}

	module.exports = createRouter;

index.js

+0 −1

Original line number	Original line	Diff line number	Diff line
	@@ -5,7 +5,6 @@ const express = require('express'),
	logger = require('morgan'),		logger = require('morgan'),
	cookieParser = require('cookie-parser'),		cookieParser = require('cookie-parser'),
	mysql = require('mysql'),		mysql = require('mysql'),
	//events = require('./events'),
	path = require('path'),		path = require('path'),
	fs = require('fs');		fs = require('fs');