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database.js
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const mongodb = require('mongodb');
const mark = require('markup-js');
const aws = require('aws-sdk');
const fs = require('fs');
const moment = require('moment');
const config = require('./lib/config');
const mongodbUri = 'mongodb://' + config.mongodb.login + ':' + config.mongodb.password + '@' + config.mongodb.host + ':' + config.mongodb.port + '/ddb';
const ses = new aws.SES({region: 'us-west-2'});
const s3 = new aws.S3();
function sendMail(content, callback) {
ses.sendEmail(content, function (err) {
if (err) callback('Internal Error: The email could not be sent');
return callback(null, 'The email was successfully sent to ' + content.Destination.ToAddresses[0]);
});
}
//ADD (feature)
module.exports.add = function(event, context, callback) {
mongodb.MongoClient.connect(mongodbUri, function(err, db) {
const col = db.collection('disasters');
const geojsonFeature = event.body;
const uuid = geojsonFeature.properties.uuid;
const mail = geojsonFeature.properties.mail;
delete geojsonFeature.properties.mail;
const disaster = {
uuid: uuid,
mail: [],
feature: geojsonFeature
};
if (mail) disaster.mail = [mail];
col.insert(disaster, function(err){
db.close();
if (err) return callback(err);
if (mail) {
const mailTemplate = fs.readFileSync('./templates/subscribe.html', 'utf8');
const info = {
name: disaster.feature.properties.name,
uuid: disaster.feature.properties.uuid,
mail: mail.mail
};
const message = mark.up(mailTemplate, info);
const params = {
Destination: { ToAddresses: [info.mail] },
Message: {
Body: { Html: {Data: message, Charset: 'UTF-8'} },
Subject: {
Data: 'successfully subscribed to Event: ' + info.name,
Charset: 'UTF-8'
}
},
Source: '[email protected]'
};
// Send the email
sendMail(params, function(err) {
if (err) return callback(err);
return callback(null, {'Message': 'disasterEvent Added to database and mail sent'});
});
}
});
});
};
//UPDATE (id, feature)
module.exports.update = function(event, context, callback) {
mongodb.MongoClient.connect(mongodbUri, function(err, db) {
const col = db.collection('disasters');
const geojsonFeature = event.body;
const uuid = geojsonFeature.properties.uuid;
const mail = geojsonFeature.properties.mail;
delete geojsonFeature.properties.mail;
if (mail) {
col.updateOne({uuid: uuid}, {$push: {'mail': mail}, $set: {'feature': geojsonFeature}}, {upsert: true}, function(err) {
db.close();
if (err) return callback(err);
const mailTemplate = fs.readFileSync('./templates/subscribe.html', 'utf8');
const info = {
name: geojsonFeature.properties.name,
uuid: geojsonFeature.properties.uuid,
mail: mail.mail
};
const message = mark.up(mailTemplate, info);
const params = {
Destination: {
ToAddresses: [info.mail]
},
Message: {
Body: {
Html: {Data: message, Charset: 'UTF-8'}
},
Subject: {
Data: 'successfully subscribed to Event: ' + info.name,
Charset: 'UTF-8'
}
},
Source: '[email protected]'
};
// Send the email
sendMail(params, function(err){
if (err) return callback(err);
return callback(null, {'Message': 'disasterEvent updated and mail sent'});
});
});
} else {
col.updateOne({uuid: uuid}, {$set: {'feature': geojsonFeature}}, {upsert: true}, function(err) {
db.close();
if (err) return callback(err);
return callback(null, {'Message': 'Successfully updated disasterEvent'});
});
}
});
};
//REMOVE (id)
module.exports.remove = function(event, context, callback) {
mongodb.MongoClient.connect(mongodbUri, function(err, db) {
const col = db.collection('disasters');
col.deleteOne({uuid: event.body.uuid}, function(err) {
db.close();
if (err) return callback('Couldn\'t remove disasterEvent from database');
return callback(null, {'Message': 'disasterEvent Removed from database'});
});
});
};
//SUBSCRIBE (id, mail)
module.exports.subscribe = function(event, context, callback) {
mongodb.MongoClient.connect(mongodbUri, function(err, db) {
const col = db.collection('disasters');
col.updateOne({uuid: event.body.uuid}, {$push: {'mail': event.body.mail}}, function(err) {
if (err) {
db.close();
return callback('Couldn\'t subscribe to disasterEvent');
}
setTimeout(function() {
col.findOne({uuid: event.body.uuid}, function(err, item) {
const mailTemplate = fs.readFileSync('./templates/subscribe.html', 'utf8');
const info = {
name: item.feature.properties.name,
uuid: item.feature.properties.uuid,
mail: event.body.mail.mail
};
const message = mark.up(mailTemplate, info);
const params = {
Destination: {
ToAddresses: [info.mail]
},
Message: {
Body: {
Html: {Data: message, Charset: 'UTF-8'}
},
Subject: {
Data: 'successfully subscribed to Event: ' + info.name,
Charset: 'UTF-8'
}
},
Source: '[email protected]'
};
db.close();
// Send the email
sendMail(params, function(err){
if (err) return callback('Couldn\'t subscribe to disasterEvent');
return callback(null, {'Message': 'Successfully subscribe to disasterEvent'});
});
});
}, 1000);
});
});
};
//UNSUBSCRIBE (id, mail)
module.exports.unsubscribe = function(event, context, callback) {
mongodb.MongoClient.connect(mongodbUri, function(err, db) {
const col = db.collection('disasters');
col.updateOne({uuid: event.body.uuid}, {$pull: {'mail': {'mail': event.body.mail}}}, function(err) {
if (err) {
db.close();
return callback('Couldn\'t unsubscribe to disasterEvent');
}
setTimeout(function() {
// Fetch the document that we modified
col.findOne({uuid: event.body.uuid}, function(err, item) {
const mailTemplate = fs.readFileSync('./templates/unsubscribe.html', 'utf8');
const info = {
name: item.feature.properties.name,
uuid: item.feature.properties.uuid
};
const message = mark.up(mailTemplate, info);
const params = {
Destination: {
ToAddresses: [event.body.mail]
},
Message: {
Body: {
Html: {Data: message, Charset: 'UTF-8'}
},
Subject: {
Data: 'successfully unsubscribed to Event: ' + info.name,
Charset: 'UTF-8'
}
},
Source: '[email protected]'
};
db.close();
// Send the email
sendMail(params, function(err){
if (err) return callback('Couldn\'t unsubscribe to disasterEvent');
return callback(null, {'Message': 'Successfully unsubscribe to disasterEvent'});
});
});
}, 1000);
});
});
};
//toGEOJSON
module.exports.toGEOJSON = function(event, context, callback) {
mongodb.MongoClient.connect(mongodbUri, function(err, db) {
const col = db.collection('disasters');
col.find({}).toArray(function(err, docs) {
db.close();
if (err) return callback('Couldn\'t retrieve disasterEvent from database');
const geojson = {
'type': 'FeatureCollection',
'features': []
};
docs.forEach(function(doc) {
var feat = doc.feature;
feat.properties.nbfollowers = doc.mail.length;
geojson.features.push(feat);
});
return callback(null, geojson);
});
});
};
//GETEVENT (id)
module.exports.getEvent = function(event, context, callback) {
mongodb.MongoClient.connect(mongodbUri, function(err, db) {
const col = db.collection('disasters');
col.find({uuid:event.query.uuid}).toArray(function(err, docs) {
db.close();
if (err) callback('Couldn\'t retrieve disasterEvent from database');
const geojson = {
'type': 'FeatureCollection',
'features': []
};
docs.forEach(function(doc) {
var feat = doc.feature;
feat.properties.nbfollowers = doc.mail.length;
geojson.features.push(feat);
});
return callback(null, geojson);
});
});
};
//BACKUP
module.exports.backup = function(event, context, callback) {
mongodb.MongoClient.connect(mongodbUri, function(err, db) {
const col = db.collection('disasters');
col.find({}).toArray(function(err, docs) {
db.close();
if (err) {
console.log('Couldn\'t retrieve disasterEvent from database');
return callback(err);
} else {
const key = 'dbbackup/disastersDB_' + moment().utc().format('YYYYMMDD_HHmmss') + '.json';
const params = {ACL: 'private', Bucket: 'remotepixel-east', Key: key, Body: JSON.stringify(docs)};
s3.upload(params, function(err) {
if (err) return callback(err);
return callback(null,'Disaster Event backup');
});
}
});
});
};