avinash0786 / board-infinity-assignment

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Board-Infinity-assignment

Link to Heroku app https://board-inf-avinash11804771.herokuapp.com/ ##Task Implementation Create a REST API to add tasks and list them.
Run using command: npm run watch or nodemon index.js or node index.js

Task is to automatically delete the task after a DURATION.

Duration(in Minutes) of task is provided by USER
To implement automatic deletion in MongoDB used TTL Time to live.

1. we need to create a index in collection using createIndex in mongoDB
   Code

    db.tasks.createIndex( { "expireAt": 1 }, { expireAfterSeconds: 0 } )
   

Whenever we insert a document and want that document to be deleted automatically we need to pass expireAt value as date and mongoDB will delete after the date-time.

    db.tasks.insert( {
       "expireAt": new Date(),
       "logEvent": 2,
       "logMessage": "Success!"
    } )

There are 2 endpoints /listTasks and /addTasks

1. /listTasks returns all the task and we populate the data on frontend.
2. /addTasks takes data from front-end and created expireAt date UTC date by adding Duration to current dateTime and insert into Database.

---

Node Modules Used

"dependencies": {
    "body-parser": "^1.19.0",
    "dotenv": "^8.2.0",
    "express": "^4.17.1",
    "mongoose": "^5.9.26",
    "nodemon": "^2.0.4"
  },

Data fromat to save in DB for /addTasks

    const task=new tasks({
            taskName:req.body.name,
            taskDesc:req.body.desc,
            creator:req.body.creator,
            duration:duration,
            expireAt:new Date(timeNow.toISOString())
        })
    task.save()
        .then(ans=>{
            return res.json({
                success:true
            })
        })

Returning Tasks to front-end /getTasks

app.get('/listTasks',((req, res) => {
    tasks.find({})
        .then(data=>{
            return res.json(data);
        })
}))

##Created by Avinash Kumar 11804771, [email protected] PS: Automatically deletion of task may not take effect instantaneously because mongoDB checks every 60 sec so it might take close to 1 min for task to delete automatically