Laravel NPS

Easily integrate custom-made NPS (Net Promoter Score) to your application.

Installation

You can install the package via composer:

composer require maize-tech/laravel-nps

You can publish and run the migrations with:

php artisan vendor:publish --tag="nps-migrations"
php artisan migrate

You can publish the config file with:

php artisan vendor:publish --tag="nps-config"

This is the contents of the published config file:

<?php

return [
    /*
    |--------------------------------------------------------------------------
    | Nps model
    |--------------------------------------------------------------------------
    |
    | Here you may specify the fully qualified class name of the nps model class.
    |
    */

    'nps_model' => Maize\Nps\Models\Nps::class,

    /*
    |--------------------------------------------------------------------------
    | Nps answer model
    |--------------------------------------------------------------------------
    |
    | Here you may specify the fully qualified class name of the nps answer
    | model class.
    |
    */

    'nps_answer_model' => Maize\Nps\Models\NpsAnswer::class,

    /*
    |--------------------------------------------------------------------------
    | Nps finder
    |--------------------------------------------------------------------------
    |
    | Here you may specify the fully qualified class name of the nps finder class.
    |
    */

    'nps_finder' => Maize\Nps\DefaultNpsFinder::class,

    /*
    |--------------------------------------------------------------------------
    | Nps visibility
    |--------------------------------------------------------------------------
    |
    | Here you may associate a custom visibility class to a name, which is then
    | used as a reference in the nps model.
    |
    */

    'visibility' => [
        'default' => Maize\Nps\DefaultNpsVisibility::class,
    ],

    /*
    |--------------------------------------------------------------------------
    | Nps range
    |--------------------------------------------------------------------------
    |
    | Here you may associate a custom range class to a name, which is then
    | used as a reference in the nps model.
    |
    */

    'range' => [
        'default' => Maize\Nps\DefaultNpsRange::class,
        'minimal' => Maize\Nps\MinimalNpsRange::class,
        'emoji' => Maize\Nps\EmojiNpsRange::class,
    ],

    /*
    |--------------------------------------------------------------------------
    | Route configurations
    |--------------------------------------------------------------------------
    |
    | Here you may specify whether routes should be enabled or not.
    | You can also customize the routes prefix and middlewares.
    |
    */

    'routes' => [
        'enabled' => true,
        'prefix' => '',
        'name' => 'nps',
        'middleware' => ['auth:api'],
        'endpoints' => [
            'show' => [
                'middleware' => [],
            ],
            'answer' => [
                'middleware' => [],
            ],
            'delay' => [
                'middleware' => [],
            ],
        ],
    ],

    /*
    |--------------------------------------------------------------------------
    | Cache
    |--------------------------------------------------------------------------
    |
    | Here you may specify the amount of time, in seconds, where each nps
    | is cached to avoid multiple database queries.
    |
    */

    'cache' => [
        'nps_ttl' => 3600,
        'nps_answer_ttl' => 3600,
    ],
];

Usage

Basic

To use the package, add the Maize\Nps\CanAnswerNps trait to the User model.

Here's an example model including the CanAnswerNps trait:

<?php

namespace App\Models;

use Maize\Nps\CanAnswerNps;

class User extends Model
{
    use CanAnswerNps;

    protected $fillable = [
        'fist_name',
        'last_name',
        'email',
    ];
}

You can then create one or multiple NPS from the DB or, if you wish, you could handle the creation with a CMS.

Here are the fields who should be filled:

• question: the question that identifies the NPS
• starts_at: the start date of the NPS
• ends_at: the end date of the NPS
• range: the value ranges accepted for the given NPS. This value must be equal to one of the keys defined in the range list from config/nps.php. Defaults to default.
• visibility: the visibility for the given NPS. This value must be equal to one of the keys defined in the visibility list from config/nps.php. Defaults to default.

Let's say we create a NPS which starts on 2021-01-01 and ends after a week: here's the model entity we would have:

$nps = [
    "id" => 1,
    "question" => "How would you rate our platform?",
    "starts_at" => "2021-01-01",
    "ends_at" => "2021-01-31",
    "range" => "default", // default range is 1-5
    "visibility" => "default", // by default a NPS is always visible
    "updated_at" => "2021-01-01",
    "created_at" => "2021-01-01",
];

You can now call the custom API to retrieve, reply or delay the current NPS, which can be customized in config/nps.php:

GET - /nps

This endpoint retrieves the current NPS using the given criteria:

• the starts_at date must be earlier than now()
• the ends_at date must be older than now()
• the NPS must be visible (defaults to true)

The NPS entries are then filtered by their ends_at date in order to pick the first one expiring.

The response contains the NPS id (used for the POST route), the question, and the accepted values. Here is a sample response body:

{
    "data": {
        "id": 1,
        "values": [
            1,
            2,
            3,
            4,
            5
        ],
        "question": "How would you rate our platform?"
    }
}

POST - /nps/{id}

This endpoint stores the answer for the given NPS from the currently authenticated user. The request requires the following attributes:

• value: the value chose by the user
• answer: the (optional) answer written by the user

There are some basic validation rules applied to the request:

• the value attribute must be an integer
• the value attribute should be between the range defined in the given NPS model
• a user should not be able to submit the answer if value is null
• a user should be able to decline their submission for the NPS. In this case, both value and answer attributes should be null

POST - /nps/{id}/delay

This endpoint marks the NPS answered in cache for the currently authenticated user, but only for a limited time.

This way, the hasAnsweredCurrentNps and hasAnsweredNps methods will return true even if the answer is not stored in the database.

The user will then be able to see again the NPS only after that amount of time has expired.

The amount of time (in seconds) can be configured in the nps_answer_ttl attribute from config/nps.php.

Custom range class

If you wish to define a custom range of values for a NPS, you can define a new class which extends the NpsRange abstract class and contains a $values array.

class MyCustomNpsRange extends NpsRange
{
    protected static array $values = [2, 4, 6, 8, 10];
}

You can then associate the class with a name used as identified for the range attribute of the NPS model. This can be easily done by adding the key-value pair in the range list from config/nps.php:

'range' => [
    'default' => Maize\Nps\DefaultNpsRange::class,
    'minimal' => Maize\Nps\MinimalNpsRange::class,
    'emoji' => Maize\Nps\EmojiNpsRange::class,
    'custom' => Path\To\MyCustomNpsRange::class,
]

You can also define an associative array in case you want the values to be an array of strings. In this case, the key should contain the string, whereas the value is the associated integer which should be sent from the POST endpoint.

class EmojiNpsRange extends NpsRange
{
    protected static array $values = [
        '😡' => 1,
        '🙁' => 2,
        '😐' => 3,
        '😉' => 4,
        '😍' => 5,
    ];
}

Custom visibility class

If you wish to define a custom visibility for a NPS, you can define a new class which extends the NpsVisibility abstract class and implement the __invoke abstract method.

For example, let's say we want a NPS to be visible for a user when they performed at least 5 logins. Here is the custom visibility class we should have:

class MinLoginsVisibility extends NpsVisibility
{
    public function __invoke(Nps $nps): bool
    {
        return auth()->user()->accessLogs()->count() >= 5;
    }
}

You can then associate the class with a name used as identified for the visibility attribute of the NPS model. This can be easily done by adding the key-value pair in the visibility list from config/nps.php:

'visibility' => [
    'default' => Maize\Nps\DefaultNpsVisibility::class,
    'min_logins' => Path\To\MinLoginsVisibility::class,
]

Testing

composer test

Changelog

Please see CHANGELOG for more information on what has changed recently.

Contributing

Please see CONTRIBUTING for details.

Security Vulnerabilities

Please review our security policy on how to report security vulnerabilities.

Credits

• Enrico De Lazzari
• Riccardo Dalla Via
• All Contributors

License

The MIT License (MIT). Please see License File for more information.