The Laravel Presenter Package

The package provides the Presenter layer for wrapping model objects into new presentations.

Features

The package supports:

• Objects and arrays presentation
• Data mapping
• Nested attributes
• Attributes overriding
• The Laravel 5.2 collections
• JSON serialization
• Casting to array/JSON
• Injections into the constructor

Requirements

"php": "^7.0", "illuminate/support": "^5.2", "illuminate/contracts": "^5.2"

Installation

Package Installation

Execute the following command to get the latest version of the package:

composer require tooleks/laravel-presenter

App Configuration

To register the service provider simply add the Tooleks\Laravel\Presenter\Providers\PresenterProvider::class into your config/app.php to the end of the providers array:

'providers' => [
    ...
    Tooleks\Laravel\Presenter\Providers\PresenterProvider::class,
],

Usage Examples

Model Presentation

To define your presenter class, you need to extend base Tooleks\Laravel\Presenter\Presenter class, as shown in the example below.

Override the getAttributesMap() method to build attributes map definition.

<?php

namespace App\Presenters;

use Tooleks\Laravel\Presenter\Presenter;

/**
 * Class UserPresenter.
 *
 * @property string nickname
 * @property string short_name
 * @property string full_name
 * @property string role
 */
class UserPresenter extends Presenter
{
    /**
     * @inheritdoc
     */
    protected function getAttributesMap(): array
    {
        return [
            // 'presenter_attribute_name' => 'wrapped_model_attribute_name'
            'nickname' => 'username',
            'short_name' => 'first_name',
            'full_name' => function () {
                return $this->getWrappedModelAttribute('first_name') . ' ' . $this->getWrappedModelAttribute('last_name');
            },
            'role' => 'role.name',
        ];
    }
}

Create a presenter object instance by passing a wrapped model into a setWrappedModel method and use it like an object with nickname, short_name, full_name, role attributes. The wrapped model may be an array or an object.

<?php

$user = [ 
    'username' => 'anna',
    'first_name' => 'Anna',
    'last_name' => 'P.',
    'role' => [
        'name' => 'User',
    ],
];

$userPresenter = app()->make(\App\Presenters\UserPresenter::class)->setWrappedModel($user);
// Create the presenter from the wrapped model array.

$userPresenter = app()->make(\App\Presenters\UserPresenter::class)->setWrappedModel((object) $user);
// Create the presenter from the wrapped model object.

echo $userPresenter->nickname;
// Prints 'anna' string, as we mapped the wrapped model 'username' attribute to the presenter 'nickname' attribute.
echo $userPresenter->short_name;
// Prints 'Anna' string, as we mapped the wrapped model 'first_name' attribute to the presenter 'short_name' attribute.
echo $userPresenter->full_name;
// Prints 'Anna P.' string, as we override the presenter 'full_name' attribute by the anonymous function.
echo $userPresenter->role;
// Prints 'User' string, as we mapped the wrapped model 'role.name' nested attribute to the presenter 'role' attribute.

Collection Presentation

The package also provides the collection macros method present() for wrapping each item in the collection into a presenter class.

<?php

collect([$user])->present(\App\Presenters\UserPresenter::class);
// Create the collection of the 'UserPresenter' items.

Data Mapping

The package provides a simple mechanism for data mapping. All you need is to call toArray() method on the presenter object instance.

<?php

$mappedDataArray = app()->make(\App\Presenters\UserPresenter::class)->setWrappedModel($user)->toArray();

$mappedDataObject = (object) app()->make(\App\Presenters\UserPresenter::class)->setWrappedModel($user)->toArray();

Using as a Response Data

The Tooleks\Laravel\Presenter\Presenter class implements Illuminate\Contracts\Support\Arrayable, Illuminate\Contracts\Support\Jsonable, JsonSerializable interfaces, so you may pass objects of this class directly into the response.

<?php

$content = app()->make(\App\Presenters\UserPresenter::class)->setWrappedModel($user);

response($content);

Tests

Execute the following command to run tests:

./vendor/bin/phpunit