mockfly-nodejs-sdk SDK Documentation

General Overview:

The mockfly-nodejs-sdk SDK provides a simple interface to interact with the Mockfly service. The SDK allows you to identify users and retrieve flags based on a user's evaluation key.

Getting Started:

To begin using mockfly-nodejs-sdk, you need to install it. (Note: I'm assuming that the package is available on npm).

npm install mockfly-nodejs-sdk

or

yarn add  mockfly-nodejs-sdk

Then, you can import it into your project:

const Mockfly = require('mockfly-nodejs-sdk')

or

import Mockfly from 'mockfly-nodejs-sdk'

Constructor:

The SDK is initialized using the constructor. The constructor accepts an object with the following properties:

• environment: The environment for which you are obtaining the flags: "production" or "test".
• authHeader: A string representing the authorization header required to make calls to the Mockfly API. This should be derived from your project's private API key.

Example:

const mockfly = new Mockfly({
  environment: 'production',
  authHeader: 'YOUR_PRIVATE_API_KEY',
})

Methods:

identify(value)

This method is used to identify a user within the system.

• value: The user's evaluation key. It is essential to call this method before getFlag().

Example:

mockfly.identify('[email protected]')

getFlag(key)

This method is used to get a flag based on the provided key.

• key: The key of the flag you wish to get.

Returns a promise that resolves to the flag value for the given key and the identified user.

Example:

mockfly
  .getFlag('feature_toggle')
  .then(data => {
    console.log(data)
  })
  .catch(error => {
    console.error(error)
  })

Error Handling:

The SDK has built-in validations and will throw errors in the following cases:

• If the authHeader is not provided when creating a Mockfly instance.
• If attempting to get a flag without providing a key.
• If attempting to get a flag without previously identifying the user.

Conclusion:

The mockfly-nodejs-sdk SDK simplifies interaction with the Mockfly service from Node.js applications. Ensure to handle potential errors and use the identify method before making calls to getFlag. Always remember that the authHeader value should be derived from the private API key of your project.