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server.js
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server.js
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const express = require('express')
const app = express()
const { MongoClient } = require('mongodb')
const cors = require('cors')
const path = require('path');
const serverless = require('serverless-http');
const port = process.env.PORT || 5000
require('dotenv').config()
// middlewares
app.use(cors({
origin: 'https://to-do-srt.netlify.app'
}))
app.use(express.json())
const router = express.Router()
// test api
router.get('/', (req, res) => res.send(`to-do app server is running on port ${port}`))
// mongodb uri of the cluster
const uri = `mongodb+srv://${process.env.DB_USER}:${process.env.DB_PASSWORD}@tasks-cluster.0fwv4yi.mongodb.net/?retryWrites=true&w=majority`;
const client = new MongoClient(uri, { useNewUrlParser: true, useUnifiedTopology: true });
// get all tasks from given collection
async function getAllTasks(collection) {
const cursor = collection.find({})
const result = await cursor.toArray()
return result
}
// get all tasks api
router.get('/tasks/:email', async (req, res) => {
// connect mongodb
(client?.topology?.isConnected() || await client.connect())
// create/get the collection of tasks of given email
const tasksCollection = client.db('to-do-srt').collection(req.params.email)
const result = await getAllTasks(tasksCollection)
res.json(result)
})
// add new single task api
router.post('/tasks/:email', async (req, res) => {
// connect mongodb
(client?.topology?.isConnected() || await client.connect())
// create/get the collection of tasks of given email
const tasksCollection = client.db('to-do-srt').collection(req.params.email)
// add the task
const result = await tasksCollection.insertOne(req.body)
const allTasks = await getAllTasks(tasksCollection)
res.json({ ...result, allTasks })
})
// delete single task api
router.delete('/tasks/:email', async (req, res) => {
// connect mongodb
(client?.topology?.isConnected() || await client.connect())
// create/get the collection of tasks of given email
const tasksCollection = client.db('to-do-srt').collection(req.params.email)
// find out the specific task to delete
const { taskAddedTime } = req.body
const query = { taskAddedTime };
// delete the task
const result = await tasksCollection.deleteOne(query);
const allTasks = await getAllTasks(tasksCollection)
res.json({ ...result, allTasks })
})
// update single task api
router.put('/tasks/:email', async (req, res) => {
// connect mongodb
(client?.topology?.isConnected() || await client.connect())
// create/get the collection of tasks of given email
const tasksCollection = client.db('to-do-srt').collection(req.params.email)
const changedTask = req.body
delete changedTask._id
const filter = { taskAddedTime: changedTask.taskAddedTime };
const updateDoc = { $set: changedTask };
// update the task
const result = await tasksCollection.updateOne(filter, updateDoc, { upsert: false });
const allTasks = await getAllTasks(tasksCollection)
res.json({ ...result, allTasks })
})
// update an array of new tasks api
router.post('/tasks/updateMultipleTasks/:email', async (req, res) => {
// connect mongodb
(client?.topology?.isConnected() || await client.connect())
// create/get the collection of tasks of given email
const tasksCollection = client.db('to-do-srt').collection(req.params.email)
// update multiple tasks
const result = await tasksCollection.bulkWrite(req.body.map(task => {
delete task._id
return {
updateOne: ({
filter: ({ taskAddedTime: task.taskAddedTime }),
update: ({ $set: task })
})
}
}))
const allTasks = await getAllTasks(tasksCollection)
res.json({ ...result.result, allTasks })
})
/* ===== setup backend to deploy as a netlify serverless function ====== */
app.use('/.netlify/functions/server', router); // path must route to lambda
app.use('/', (req, res) => res.sendFile(path.join(__dirname, './index.html')));
module.exports = app;
module.exports.handler = serverless(app);