abhigupta/laravel-feature-toggle

Abstract Feature Flags from Providers

This package allows you to implement feature flags in Laravel. Right now the only supported implementation is split.io.

Basic Usage

Change Behavior Based on a Flag

use PartechGSS\Laravel\FeatureToggle\Contracts\FeatureToggleClient;

$client = resolve(FeatureToggleClient::class);
switch ($client->getTreatment('my_flag')) {
    case "on":
        do_a_thing();
        break;

    default:
        do_another_thing();
        break;
}

Retrieve Configuration Attached to a Treatment

$treatmentWithConfig = $client->getTreatmentWithConfig('my_flag');
$treatment = $treatmentWithConfig['treatment'];
$config = $treatmentWithConfig['config'];
set_some_css_options($config);

Retrieve Multiple Flags in a Batch

$treatments = $client->getTreatments(['my_flag', 'another_flag']);
switch($treatments['my_flag']) {
    ...
}

Retrieve Configurations in a Batch

$treatmentsWithConfig = $client->getTreatmentsWithConfig('my_flag');
$treatment = $treatmentsWithConfig['my_flag']['treatment'];
$config = $treatmentsWithConfig['my_flgag']['config'];
set_some_css_options($config);

Installation

You can install the package via Composer:

composer require partechgss/laravel-feature-toggles

Configuration

Config File

Looks for config/feature-toggle.php. To install the default one:

php artisan vendor:publish

Middleware

You need to set the toggle "key" somewhere. This is usually something like a user's email address, used to decide which treatment the user gets for a particular flag. This package provides middleware that automatically sets the key based on the user's email addesss. This must be run after your authentication middleware, so, first make it available as route middleware and set the priority in your app/Http/Kernel.php.

use PartechGSS\Laravel\FeatureToggle\Middleware\SetFeatureToggleKeyFromUserEmail;
protected $routeMiddleware = [
    'auth' => \App\Http\Middleware\Authenticate::class,
    'feature-toggle' => SetFeatureToggleKeyFromUserEmail::class,
];
protected $middlewarePriority = [
    \App\Http\Middleware\Authenticate::class,
    SetFeatureToggleKeyFromUserEmail::class,
];

Execute as Route Middleware

# routes/api.php
Route::middleware(['auth:api', 'feature-toggle'])->group(function() {
    ...,
});

Execute via Route Middleware Groups

# app/Http/Kernel.php
protected $middlewareGroups = [
    'web' => [
        ...,
        'feature-toggle',
    ],

    'api' => [
        \Barryvdh\Cors\HandleCors::class,
        'throttle:60,1',
        'bindings',
        'feature-toggle',
    ],
];

Testing

This Project

composer test

Your Project

The SplitIO SDK throws errors when it can't find a configuration file in localhost mode. To work around that, create a dummy local split.yaml file and ask the factory to load it. For example, you can set SPLITIO_SPLIT_FILE in your testing environment to point to your file:

# .env.testing
SPLITIO_SPLIT_FILE=tests/__data__/split.yaml

This assumes a file like this one at tests/__data__/split.yaml:

- hello_world:
  treatment: off
- hello_world:
  treatment: on
  keys: "user@example.org"