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Twitter

Given an app.js file and a database file twitterClone.db consisting of five tables user, follower, tweet, reply, and like.

Write APIs to perform operations on the tables user, follower, tweet, reply, and like containing the following columns,

User Table

Column Type
user_id INTEGER
name TEXT
username TEXT
password TEXT
gender TEXT

Follower Table

Column Type
follower_id INTEGER
follower_user_id INTEGER
following_user_id INTEGER

Here, if user1 follows user2 then,

follower_user_id is the user ID of user1 and following_user_id is the user ID of user2.

Tweet Table

Column Type
tweet_id INTEGER
tweet TEXT
user_id INTEGER
date_time DATETIME

Reply Table

Column Type
reply_id INTEGER
tweet_id INTEGER
reply TEXT
user_id INTEGER
date_time DATETIME

Like Table

Column Type
like_id INTEGER
tweet_id INTEGER
user_id INTEGER
date_time DATETIME

Sample Valid User Credentials

{
  "username":"JoeBiden",
  "password":"biden@123"
}

API 1

Path: /register/

Method: POST

Request

{
  "username": "adam_richard",
  "password": "richard_567",
  "name": "Adam Richard",
  "gender": "male"
}
  • Scenario 1

    • Description:

      If the username already exists

    • Response

      • Status code
        400
        
      • Body
        User already exists
        
  • Scenario 2

    • Description:

      If the registrant provides a password with less than 6 characters

    • Response

      • Status code
        400
        
      • Body
        Password is too short
        
  • Scenario 3

    • Description:

      Successful registration of the registrant

    • Response

      • Status code

        200
        
      • Body

        User created successfully
        

API 2

Path: /login/

Method: POST

Request

{
  "username":"JoeBiden",
  "password":"biden@123"
}
  • Scenario 1

    • Description:

      If the user doesn't have a Twitter account

    • Response

      • Status code
        400
        
      • Body
        Invalid user
        
  • Scenario 2

    • Description:

      If the user provides an incorrect password

    • Response

      • Status code
        400
        
      • Body
        Invalid password
        
  • Scenario 3

    • Description:

      Successful login of the user

    • Response

      Return the JWT Token

      {
        "jwtToken": "ak2284ns8Di32......"
      }
      

Authentication with JWT Token

Write a middleware to authenticate the JWT token.

  • Scenario 1

    • Description:

      If the JWT token is not provided by the user or an invalid JWT token is provided

    • Response

      • Status code
        401
        
      • Body
        Invalid JWT Token
        
  • Scenario 2

    • After successful verification of JWT token, proceed to next middleware or handler

API 3

Path: /user/tweets/feed/

Method: GET

Description:

Returns the latest tweets of people whom the user follows. Return 4 tweets at a time

Response

 [
   {
      username: "SrBachchan",
      tweet: "T 3859 - do something wonderful, people may imitate it ..",
      dateTime: "2021-04-07 14:50:19"
   },
   ...
 ]

API 4

Path: /user/following/

Method: GET

Description:

Returns the list of all names of people whom the user follows

Response

[
  {
    "name": "Narendra Modi"
  },
  ...
]

API 5

Path: /user/followers/

Method: GET

Description:

Returns the list of all names of people who follows the user

Response

[
  {
    "name": "Narendra Modi"
  },
  ...
]

API 6

Path: /tweets/:tweetId/

Method: GET

  • Scenario 1

    • Description:

      If the user requests a tweet other than the users he is following

    • Response

      • Status code
        401
        
      • Body
        Invalid Request
        
  • Scenario 2

    • Description:

      If the user requests a tweet of the user he is following, return the tweet, likes count, replies count and date-time

    • Response

      {
         "tweet": "T 3859 - do something wonderful, people may imitate it ..",
         "likes": 3,
         "replies": 1,
         "dateTime": "2021-04-07 14:50:19"
      }
      

API 7

Path: /tweets/:tweetId/likes/

Method: GET

  • Scenario 1

    • Description:

      If the user requests a tweet other than the users he is following

    • Response

      • Status code
        401
        
      • Body
        Invalid Request
        
  • Scenario 2

    • Description:

      If the user requests a tweet of a user he is following, return the list of usernames who liked the tweet

    • Response

      {
         "likes": ["albert", ]
      }
      

API 8

Path: /tweets/:tweetId/replies/

Method: GET

  • Scenario 1

    • Description:

      If the user requests a tweet other than the users he is following

    • Response

      • Status code
        401
        
      • Body
        Invalid Request
        
  • Scenario 2

    • Description:

      If the user requests a tweet of a user he is following, return the list of replies.

    • Response

      ```
      {
         "replies": [
           {
             "name": "Narendra Modi",
             "reply": "When you see it.."
            },
          ...]
      }
      ```
      

API 9

Path: /user/tweets/

Method: GET

Description:

Returns a list of all tweets of the user

Response

[
  {
    "tweet": "Ready to don the Blue and Gold",
    "likes": 3,
    "replies": 4,
    "dateTime": "2021-4-3 08:32:44"
  },
  ...
]

API 10

Path: /user/tweets/

Method: POST

Description:

Create a tweet in the tweet table

Request

{
   "tweet": "The Mornings..."
}

Response

Created a Tweet

API 11

Path: /tweets/:tweetId/

Method: DELETE

  • Scenario 1

    • Description:

      If the user requests to delete a tweet of other users

    • Response

      • Status code
        401
        
      • Body
        Invalid Request
        
  • Scenario 2

    • Description:

      If the user deletes his tweet

    • Response

      Tweet Removed
      

Use npm install to install the packages.

Export the express instance using the default export syntax.

Use Common JS module syntax.

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