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server.js
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server.js
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//var path = require('path');
//var Handlebars = require("handlebars");
//var partials = "./views/partials/";
//var fs = require('fs');
var express = require('express');
var exphbs = require('express-handlebars');
var bodyParser = require('body-parser');
//var voteData = require('./voteData');
var MongoClient = require('mongodb').MongoClient;
var mongoHost = process.env.MONGO_HOST || 'classmongo.engr.oregonstate.edu';
var mongoPort = process.env.MONGO_PORT || '27017';
var mongoUsername = process.env.MONGO_USERNAME || 'cs290_liyi4';
var mongoPassword = process.env.MONGO_PASSWORD || 'cs290_liyi4';
var mongoDBName = process.env.MONGO_DB_NAME || 'cs290_liyi4';
var app = express();
var port = process.env.PORT || 3000;
var mongoURL = "mongodb://" + mongoUsername + ":" + mongoPassword + "@" + mongoHost + ":" + mongoPort + "/" + mongoDBName;
var mongoDB = null;
app.engine('handlebars', exphbs({ defaultLayout: 'main' }));
app.set('view engine', 'handlebars');
app.use(bodyParser.json());
app.use(express.static('public'));
app.get('/', function (req, res, next) {
var voteCollection = mongoDB.collection('vote');
//console.log('==',voteCollection);
voteCollection.find({}).toArray(function (err, voteDocs) {
if (err) {
res.status(500).send("Error communicating with the DB.");
} else if (voteDocs.length > 0) {
res.status(200).render('homePage',{vote:voteDocs});
console.log("== homepage!!! ==");
//console.log('== vote: \n', voteDocs[0]);
} else {
next();
}
});
//res.status(200).render('homePage',{vote:voteData});
});
//app.get('/index', function (req, res, next) {
// console.log("== 200");
// res.status(200).render('homePage');
//});
app.get('/votes/data', function (req, res, next) {
var voteCollection = mongoDB.collection('vote');
//console.log('==',voteCollection);
voteCollection.find({}).toArray(function (err, voteDocs) {
if (err) {
res.status(500).send("Error communicating with the DB.");
} else if (voteDocs.length > 0) {
res.status(200).send(JSON.stringify(voteDocs));
//console.log('== vote: \n', voteDocs[0]);
console.log("== send vote data ==");
}
});
});
app.post('/votes/userdata', function (req, res, next) {
var voteCollection = mongoDB.collection('vote');
//var newdata = JSON.parse(req.body);
voteCollection.insertOne(req.body,function(err){
if (err) {
res.status(500).send("Error communicating with the DB.");
} else {
res.status(200).send();
console.log("== received vote data ==");
}
});
});
app.post('/votes/:id/:choice/:index', function (req, res, next) {
var _id = req.params.id.toString();
var choice = req.params.choice.toString();
var index = req.params.index.toString();
var voteCollection = mongoDB.collection('vote');
//var newdata = JSON.parse(req.body);
console.log("===",_id,typeof _id,choice,index);
voteCollection.updateOne({chartid:_id},{$inc:{[`chartData.data.datasets.0.data.${index}`]:1,"size":1}},function(err){
if (err) {
res.status(500).send("Error communicating with the DB.");
} else {
res.status(200).send();
console.log("== updated vote data ==");
}
});
});
app.get('*', function (req, res, next) {
console.log("== 404 ==");
res.status(404).render('404');
});
console.log("== connecting to ",mongoURL,".......");
MongoClient.connect(mongoURL,{ useNewUrlParser: true },function (err, client) {
if (err) {
throw err;
}
mongoDB = client.db(mongoDBName);
console.log("== connected success! ==");
app.listen(port, function (err) {
if (err) {
throw err;
}
console.log("== Server listening on port", port," ==");
})
});