Mida.so - Server-side A/B Testing and Feature Flags

This is a server-side A/B testing and feature flags code that allows you to integrate with the Mida platform. The code is written in JavaScript and can be used in a Node.js environment.

Prerequisites

Before using this code, make sure you have the following set up:

• Flutter and Dart installed on your machine
• A Mida.so account with project and experiment key

Installation

1. Download this plugin
2. Import the necessary dependencies by adding in as plugin with path as following command into pubspec.yaml:

dev_dependencies:
  mida:
    path: ../mida-core

Usage

To use the server-side A/B testing and feature flags code, follow these steps:

1. Import the Mida package into your code:

import 'package:mida/mida.dart';

2. Create an instance of the Mida class by providing your Mida project key:

final mida = Mida(publicKey: 'YOUR_PROJECT_KEY');

A/B Testing

3. Use the getExperiment method to retrieve the current version of an experiment for a user. You need to provide the experiment key and the distinct ID of the user:

final version = await mida.getExperiment(experimentKey: 'EXPERIMENT_KEY', distinctId: 'USER_DISTINCT_ID');
if (version == 'Control') {
  // Handle Control logic
}
if (version == 'Variant 1') {
  // Handle Variant 1 logic
}
// Depending on how many variants you have created
if (version == 'Variant 2') {
  // Handle Variant 2 logic
}

4. Use the setEvent method to log an event for a user. You need to provide the event name and the distinct ID of the user:

final event = await mida.setEvent(eventName: 'EVENT_NAME', distinctId: 'USER_DISTINCT_ID');

User Attributes

5. Use the setAttribute method to set user attributes for a specific user. You need to provide the distinct ID of the user and an object containing the attribute key-value pairs:

final track = await mida.setAttribute(properties: {gender: 'male', company_name: 'Apple Inc'}, distinctId: 'USER_DISTINCT_ID');

API Reference

Mida(projectKey, options)

• projectKey: (required) Your Mida project key.
• userId: (optional) Your default user ID.

getExperiment(experimentKey, distinctId)

• experimentKey: (required) The key of the experiment you want to get the version of.
• distinctId: (optional) The distinct ID of the user that other than default user ID.
• Returns a Response that resolves to the version of the experiment.

setEvent(eventName, distinctId)

• eventName: (required) The name of the event you want to log.
• distinctId: (optional) The distinct ID of the user that other than default user ID.
• Returns a Response that resolves when the event is successfully logged.

setAttribute(distinctId, properties)

• properties: (required) An object containing the attribute key-value pairs.
• distinctId: (optional) The distinct ID of the user that other than default user ID.
• Returns a Response that resolves when the attributes are successfully set.

Contributing

Contributions are welcome! If you find any issues or have suggestions for improvement, please create a pull request.

License

This code is open source and available under the MIT License.