siva-mummadisetti/nodejs-stock-trades-api

Hacker rank Test GL - Concepts : adding integer in sequence 1 to n automatically in mongo document, validating some conditions before insert into DB, using query parameters of the request URL, diff code struct.

Stock Trades API Hard

Data:

Example of a trade data JSON object:

{
    "id":1,
    "type": "buy",
    "user_id": 23,
    "symbol": "ABX",
    "shares": 30,
    "price": 134,
    "timestamp": 1531522701000
}

Project Specifications:

The task is to implement a model for the trade object and the REST service that exposes the /trades endpoint, which allows for managing the collection of trade records in the following way:

POST request to /trades:

• creates a new trade
• expects a JSON trade object without an id property as a body payload. If the shares value is out of accepted range [1, 100], or the type value is invalid (i.e. not 'buy' or 'sell'), the API must return error code 400. Besides those cases, you can assume that the given payload is always valid.
• adds the given trade object to the collection of trades and assigns a unique integer id to it. The first created trade must have id 1, the second one 2, and so on.
• the response code is 201, and the response body is the created trade object

GET request to /trades:

• returns a collection of all trades
• the response code is 200, and the response body is an array of all trades objects ordered by their ids in increasing order
• optionally accepts query parameters type and user_id, for example /trades?type=buy&&user_id=122. All these parameters are optional. In case they are present, only objects matching the parameters must be returned.

GET request to /trades/<id>:

• returns a trade with the given id
• if the matching trade exists, the response code is 200 and the response body is the matching trade object
• if there is no trade with the given id in the collection, the response code is 404 with the body having the text ID not found

DELETE, PUT, PATCH request to /trades/<id>:

• the response code is 405 because the API does not allow deleting or modifying trades for any id value

Note:

You are expected to choose the ORM you want to use and initialize the connection of the Database in the file connection.js. The following ORMs/Databases are available for use out of the box:

1. Sequelize with SQLITE
2. Mongoose with MongoDB

Environment

• Node Version: ^12.18.2
• Default Port: 8000

Read Only Files

• test/*