From 52f746308fa02b50630f5a8995354ea30bcb4822 Mon Sep 17 00:00:00 2001 From: akshay931 Date: Fri, 10 Jan 2025 13:03:41 +0530 Subject: [PATCH] committed --- .gitignore | 8 + Dockerfile | 14 + docker-compose.yml | 37 + models/notification.js | 13 + models/user.js | 16 + package-lock.json | 1127 ++++++++++++++++++++++++++++ package.json | 21 + queries/aggregation.js | 34 + queries/deduplication.js | 16 + queries/quietHours.js | 26 + queries/throttling.js | 21 + queries/urgentAlerts.js | 11 + services/analytics.js | 44 ++ services/notificationDelivery.js | 106 +++ services/notificationIngestion.js | 50 ++ services/notificationProcessing.js | 110 +++ src/server.js | 35 + 17 files changed, 1689 insertions(+) create mode 100644 Dockerfile create mode 100644 docker-compose.yml create mode 100644 models/notification.js create mode 100644 models/user.js create mode 100644 package-lock.json create mode 100644 package.json create mode 100644 queries/aggregation.js create mode 100644 queries/deduplication.js create mode 100644 queries/quietHours.js create mode 100644 queries/throttling.js create mode 100644 queries/urgentAlerts.js create mode 100644 services/analytics.js create mode 100644 services/notificationDelivery.js create mode 100644 services/notificationIngestion.js create mode 100644 services/notificationProcessing.js create mode 100644 src/server.js diff --git a/.gitignore b/.gitignore index c6bba59..fb32805 100644 --- a/.gitignore +++ b/.gitignore @@ -1,3 +1,4 @@ +<<<<<<< HEAD # Logs logs *.log @@ -128,3 +129,10 @@ dist .yarn/build-state.yml .yarn/install-state.gz .pnp.* +======= +node_modules/ +.env +.DS_Store +*.log + +>>>>>>> b3f28e6 (committed) diff --git a/Dockerfile b/Dockerfile new file mode 100644 index 0000000..a2cf22a --- /dev/null +++ b/Dockerfile @@ -0,0 +1,14 @@ +FROM node:22 + +WORKDIR /usr/src/app + +COPY package*.json ./ + +RUN npm install + +COPY . . + +EXPOSE 3000 + +CMD [ "node", "src/server.js" ] + diff --git a/docker-compose.yml b/docker-compose.yml new file mode 100644 index 0000000..35c53ba --- /dev/null +++ b/docker-compose.yml @@ -0,0 +1,37 @@ +version: '3' +services: + app: + build: . + ports: + - "3000:3000" + depends_on: + - mongodb + - kafka + environment: + - MONGODB_URI=mongodb://mongodb:27017/test # Updated to use 'test' database + - KAFKA_BROKERS=kafka:9092 + + mongodb: + image: mongo:latest + ports: + - "27017:27017" + volumes: + - mongodb_data:/data/db + + kafka: + image: wurstmeister/kafka:latest + ports: + - "9092:9092" + environment: + KAFKA_ADVERTISED_HOST_NAME: kafka + KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181 + depends_on: + - zookeeper + + zookeeper: + image: wurstmeister/zookeeper:latest + ports: + - "2181:2181" + +volumes: + mongodb_data:{} diff --git a/models/notification.js b/models/notification.js new file mode 100644 index 0000000..41282e1 --- /dev/null +++ b/models/notification.js @@ -0,0 +1,13 @@ +const mongoose = require('mongoose'); + +const notificationSchema = new mongoose.Schema({ + message: { type: String, required: true }, + userId: { type: String, required: true }, + priority: { type: String, enum: ['low', 'normal', 'high'], default: 'normal' }, + sendTime: { type: Date }, + createdAt: { type: Date, default: Date.now }, + status: { type: String, enum: ['pending', 'sent', 'failed'], default: 'pending' } +}); + +module.exports = mongoose.model('Notification', notificationSchema); + diff --git a/models/user.js b/models/user.js new file mode 100644 index 0000000..0132478 --- /dev/null +++ b/models/user.js @@ -0,0 +1,16 @@ +const mongoose = require('mongoose'); + +const userSchema = new mongoose.Schema({ + userId: { type: String, required: true, unique: true }, + preferences: { + channels: [{ type: String, enum: ['email', 'sms', 'push'] }], + quietHours: { + start: { type: String, match: /^([01]\d|2[0-3]):([0-5]\d)$/ }, + end: { type: String, match: /^([01]\d|2[0-3]):([0-5]\d)$/ } + }, + notificationLimit: { type: Number, default: 3 } + } +}); + 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0000000..1febb91 --- /dev/null +++ b/queries/aggregation.js @@ -0,0 +1,34 @@ +const Notification = require('../models/notification'); + +async function aggregateLowPriorityNotifications(userId) { + const oneHourFromNow = new Date(Date.now() + 60 * 60 * 1000); + const notifications = await Notification.find({ + userId, + priority: 'low', + sendTime: { $lte: oneHourFromNow }, + status: 'pending' + }); + + if (notifications.length > 1) { + const summary = `You have ${notifications.length} + ${notifications.map(n => '- ' + n.message).join('\n')}`; + + await Notification.updateMany( + { _id: { $in: notifications.map(n => n._id) } }, + { $set: { status: 'aggregated' } } + ); + + return new Notification({ + userId, + message: summary, + priority: 'low', + sendTime: new Date(), + status: 'pending' + }); + } + + return null; +} + +module.exports = { aggregateLowPriorityNotifications }; + diff --git a/queries/deduplication.js b/queries/deduplication.js new file mode 100644 index 0000000..010db3d --- /dev/null +++ b/queries/deduplication.js @@ -0,0 +1,16 @@ +const Notification = require('../models/notification'); + +async function checkDuplication(notification) { + const oneHourAgo = new Date(Date.now() - 60 * 60 * 1000); + const similarNotification = await Notification.findOne({ + userId: notification.userId, + message: notification.message, + createdAt: { $gte: oneHourAgo }, + status: 'sent' + }); + + return !!similarNotification; +} + +module.exports = { checkDuplication }; + diff --git a/queries/quietHours.js b/queries/quietHours.js new file mode 100644 index 0000000..95596a3 --- /dev/null +++ b/queries/quietHours.js @@ -0,0 +1,26 @@ +const User = require('../models/user'); + +function isInQuietHours(user, currentTime) { + if (!user.preferences.quietHours) { + return false; + } + + const { start, end } = user.preferences.quietHours; + const [startHour, startMinute] = start.split(':').map(Number); + const [endHour, endMinute] = end.split(':').map(Number); + + const startTime = new Date(currentTime); + startTime.setHours(startHour, startMinute, 0); + + const endTime = new Date(currentTime); + endTime.setHours(endHour, endMinute, 0); + + if (endTime < startTime) { + endTime.setDate(endTime.getDate() + 1); + } + + return currentTime >= startTime && currentTime < endTime; +} + +module.exports = { isInQuietHours }; + diff --git a/queries/throttling.js b/queries/throttling.js new file mode 100644 index 0000000..61ccdf2 --- /dev/null +++ b/queries/throttling.js @@ -0,0 +1,21 @@ +const User = require('../models/user'); +const Notification = require('../models/notification'); + +async function checkThrottling(userId) { + const user = await User.findOne({ userId }); + if (!user) { + throw new Error('User not found'); + } + + const oneHourAgo = new Date(Date.now() - 60 * 60 * 1000); + const recentNotifications = await Notification.countDocuments({ + userId, + createdAt: { $gte: oneHourAgo }, + status: 'sent' + }); + + return recentNotifications < user.preferences.notificationLimit; +} + +module.exports = { checkThrottling }; + diff --git a/queries/urgentAlerts.js b/queries/urgentAlerts.js new file mode 100644 index 0000000..4e7781d --- /dev/null +++ b/queries/urgentAlerts.js @@ -0,0 +1,11 @@ +const Notification = require('../models/notification'); + +async function getUrgentAlerts() { + return Notification.find({ + priority: 'high', + status: 'pending' + }).sort({ createdAt: 1 }); +} + +module.exports = { getUrgentAlerts }; + diff --git a/services/analytics.js b/services/analytics.js new file mode 100644 index 0000000..f715b7d --- /dev/null +++ b/services/analytics.js @@ -0,0 +1,44 @@ +const express = require('express'); +const router = express.Router(); +const Notification = require('../models/notification'); + +router.get('/analytics', async (req, res) => { + try { + const totalSent = await Notification.countDocuments({ status: 'sent' }); + const totalFailed = await Notification.countDocuments({ status: 'failed' }); + const totalRetried = await Notification.countDocuments({ status: 'retried' }); + + const deliveryStats = { + totalSent, + totalFailed, + totalRetried + }; + + + const sentNotifications = await Notification.find({ status: 'sent' }); + const totalDeliveryTime = sentNotifications.reduce((sum, notification) => { + return sum + (notification.sentAt - notification.createdAt); + }, 0); + const averageDeliveryTime = totalDeliveryTime / sentNotifications.length; + + + const totalResponses = await Notification.countDocuments({ userResponded: true }); + const responseRate = totalResponses / totalSent; + + const userEngagement = { + averageDeliveryTime, + responseRate + }; + + res.json({ + deliveryStats, + userEngagement + }); + } catch (error) { + console.error('Error generating analytics:', error); + res.status(500).json({ error: 'Internal server error' }); + } +}); + +module.exports = router; + diff --git a/services/notificationDelivery.js b/services/notificationDelivery.js new file mode 100644 index 0000000..f49b9c3 --- /dev/null +++ b/services/notificationDelivery.js @@ -0,0 +1,106 @@ +const User = require('../models/user'); +const Notification = require('../models/notification'); +const { checkThrottling } = require('../queries/throttling'); +const { isInQuietHours } = require('../queries/quietHours'); +const { checkDuplication } = require('../queries/deduplication'); +const { aggregateLowPriorityNotifications } = require('../queries/aggregation'); +const { getUrgentAlerts } = require('../queries/urgentAlerts'); +const { MongoClient } = require('mongodb'); +const mongoClient = new MongoClient('mongodb://localhost:27017'); + +async function deliverNotifications() { + + const urgentAlerts = await getUrgentAlerts(); + for (const alert of urgentAlerts) { + await processNotification(alert); + } + + const pendingNotifications = await Notification.find({ status: 'pending', priority: { $ne: 'high' } }); + for (const notification of pendingNotifications) { + await processNotification(notification); + } +} + +async function processNotification(notification) { + await mongoClient.connect(); + const user = await User.findOne({ userId: notification.userId }); + if (!user) { + console.error(`User not found for notification: ${notification._id}`); + return; + } + + if (!(await checkThrottling(user.userId))) { + await rescheduleNotification(notification); + return; + } + + if (isInQuietHours(user, new Date())) { + await rescheduleNotification(notification); + return; + } + + if (await checkDuplication(notification)) { + + const db = mongoClient.db('test'); + await Notification.updateOne({ _id: notification._id }, { status: 'suppressed' }); + // await db.collection('scheduledNotifications').deleteOne({ _id: notification._id }); + return; + } + + if (notification.priority === 'low') { + const aggregatedNotification = await aggregateLowPriorityNotifications(user.userId); + if (aggregatedNotification) { + await sendNotification(aggregatedNotification, user); + return; + } + } + + await sendNotification(notification, user); +} + +async function sendNotification(notification, user) { + for (const channel of user.preferences.channels) { + try { + switch (channel) { + case 'email': + await sendEmail(notification, user); + break; + case 'sms': + await sendSMS(notification, user); + break; + case 'push': + await sendPushNotification(notification, user); + break; + } + await Notification.updateOne({ _id: notification._id }, { status: 'sent' }); + return; + } catch (error) { + console.error(`Failed to send notification via ${channel}:`, error); + } + } + + await Notification.updateOne({ _id: notification._id }, { status: 'failed' }); +} + +async function rescheduleNotification(notification) { + const newSendTime = new Date(Date.now() + 60 * 60 * 1000); // Reschedule for 1 hour later + const db = mongoClient.db('test'); + await Notification.updateOne({ _id: notification._id }, { sendTime: newSendTime }); + await db.collection('scheduledNotifications').updateOne({ _id: notification._id }, { sendTime: newSendTime }); +} + +// Mock delivery functions +async function sendEmail(notification, user) { + console.log(`Sending email to ${user.userId}: ${notification.message}`); +} + +async function sendSMS(notification, user) { + console.log(`Sending SMS to ${user.userId}: ${notification.message}`); +} + +async function sendPushNotification(notification, user) { + console.log(`Sending push notification to ${user.userId}: ${notification.message}`); +} + +module.exports = { deliverNotifications,sendNotification }; + diff --git a/services/notificationIngestion.js b/services/notificationIngestion.js new file mode 100644 index 0000000..2bc01d9 --- /dev/null +++ b/services/notificationIngestion.js @@ -0,0 +1,50 @@ +const express = require('express'); +const { Kafka } = require('kafkajs'); +const router = express.Router(); +const Notification = require('../models/notification'); +const { MongoClient } = require('mongodb'); +const kafka = new Kafka({ clientId: 'notification-app', brokers: ['localhost:9092'] }); +const producer = kafka.producer(); +const mongoClient = new MongoClient('mongodb://localhost:27017'); + +router.post('/notify', async (req, res) => { + try { + const { message, userId, priority, sendTime } = req.body; + + if (!message || !userId) { + return res.status(400).json({ error: 'Missing required fields' }); + } + + const notification = new Notification({ + message, + userId, + priority: priority || 'normal', + sendTime: sendTime, + createdAt: new Date(), + status: 'pending' + }); + + await notification.save(); + // await mongoClient.connect(); + // const db = mongoClient.db('notifications'); + // await db.collection('notification').insertOne(notification); + + + // Publish to Kafka + await producer.connect(); + await producer.send({ + topic: 'notifications', + messages: [{ value: JSON.stringify(notification) }], + }); + + res.status(200).json({ message: 'Notification received' }); + } catch (error) { + console.error('Error processing notification:', error); + res.status(500).json({ error: 'Internal server error' }); + } finally { + await producer.disconnect(); + } +}); + +module.exports = router; + diff --git a/services/notificationProcessing.js b/services/notificationProcessing.js new file mode 100644 index 0000000..2995624 --- /dev/null +++ b/services/notificationProcessing.js @@ -0,0 +1,110 @@ +const { Kafka } = require('kafkajs'); +const { MongoClient } = require('mongodb'); +const User = require('../models/user'); +const Notification = require('../models/notification'); +const schedule = require('node-schedule'); +// const {sendNotification} = require('./notificationDelivery') +const { checkDuplication } = require('../queries/deduplication'); +const kafka = new Kafka({ clientId: 'notification-processor', brokers: ['localhost:9092'] }); +const consumer = kafka.consumer({ groupId: 'notification-processor-group' }); +const mongoClient = new MongoClient('mongodb://localhost:27017'); + +async function processNotifications() { + await consumer.connect(); + await consumer.subscribe({ topic: 'notifications', fromBeginning: true }); + + await consumer.run({ + eachMessage: async ({ message }) => { + const notification = JSON.parse(message.value.toString()); + if (notification.priority == 'high' || !notification.sendTime || new Date(notification.sendTime) <= new Date() ) +{ + // + // Process immediately + // if (await checkDuplication(notification)) { + // await Notification.updateOne({ _id: notification._id }, { status: 'suppressed' }); + // return; + // } + // const user = await User.findOne({ userId: notification.userId }); + await sendNotification(notification); + + } else { + // Schedule for later + + await storeNotification(notification); + } + }, + }); +} + +async function storeNotification(notification) { + await mongoClient.connect(); + const db = mongoClient.db('test'); + await db.collection('scheduledNotifications').insertOne({ + ...notification, + sendTime: new Date(notification.sendTime), + createdAt:new Date(notification.createdAt) + }); +} + +async function checkScheduledNotifications() { + const db = mongoClient.db('test'); + const now = new Date(); + const notifications = await db.collection('scheduledNotifications') + .find({ sendTime: { $lte: now } }) + .toArray(); + console.log(notifications) + for (const notification of notifications) { + const user = await User.findOne({ userId: notification.userId }); + await sendNotification(notification,user); + await db.collection('scheduledNotifications').deleteOne({ _id: notification._id }); + } +} + +async function sendNotification(notification) { + + console.log('Sending notification:', notification); +} +// async function sendNotification(notification, user) { +// for (const channel of user.preferences.channels) { +// try { +// switch (channel) { +// case 'email': +// await sendEmail(notification, user); +// break; +// case 'sms': +// await sendSMS(notification, user); +// break; +// case 'push': +// await sendPushNotification(notification, user); +// break; +// } +// await Notification.updateOne({ _id: notification._id }, { status: 'sent' }); +// return; +// } catch (error) { +// console.error(`Failed to send notification via ${channel}:`, error); +// } +// } + +// async function sendEmail(notification, user) { +// console.log(`Sending email to ${user.userId}: ${notification.message}`); +// } + +// async function sendSMS(notification, user) { +// console.log(`Sending SMS to ${user.userId}: ${notification.message}`); +// } + +// async function sendPushNotification(notification, user) { +// console.log(`Sending push notification to ${user.userId}: ${notification.message}`); +// } + +// // If all channels fail, mark as failed +// await Notification.updateOne({ _id: notification._id }, { status: 'failed' }); +// } +// Run the processor +processNotifications().catch(console.error); + +// Schedule periodic checks for pending notifications +schedule.scheduleJob('*/1 * * * *', checkScheduledNotifications); + +module.exports = { processNotifications, checkScheduledNotifications }; + diff --git a/src/server.js b/src/server.js new file mode 100644 index 0000000..514f2be --- /dev/null +++ b/src/server.js @@ -0,0 +1,35 @@ +const express = require('express'); +const mongoose = require('mongoose'); +const { Kafka } = require('kafkajs'); +const notificationIngestion = require('../services/notificationIngestion'); +const notificationProcessing = require('../services/notificationProcessing'); +const notificationDelivery = require('../services/notificationDelivery'); +const analytics = require('../services/analytics'); + +const app = express(); +app.use(express.json()); + + +mongoose.connect('mongodb://localhost:27017', { useNewUrlParser: true, useUnifiedTopology: true }); + +const kafka = new Kafka({ + clientId: 'client1', + brokers: ['localhost:9092'] +}); + +app.use('/api', notificationIngestion); +app.use('/api', analytics); + + +notificationProcessing.processNotifications().catch(console.error); + + +setInterval(() => { + notificationDelivery.deliverNotifications().catch(console.error); +}, 1000); + +const PORT = process.env.PORT || 3000; +app.listen(PORT, () => { + console.log(`Server running on port ${PORT}`); +}); +