Email notifier

AbstractableNotifier.php

<?php namespace Support\Notifier;

use Model\User;
use Illuminate\Support\Arr;
use Symfony\Component\ExpressionLanguage\ExpressionLanguage;

abstract class AbstractableNotifier {

    /**
     * Expression language component
     * 
     * @var \Symfony\Component\ExpressionLanguage\ExpressionLanguage
     */
    protected $expression;

    /**
     * Notifier settings and configuration
     * 
     * @var array
     */
    protected $settings = [];

    /**
     * User eloquent model
     * 
     * @var \Rokki\Model\User
     */
    protected $recipient;

    /**
     * [$data description]
     * @var [type]
     */
    protected $data = [];

    /**
     * [$rules description]
     * @var [type]
     */
    protected $variables = [];

    /**
     * [__construct description]
     * @param ExpressionLanguage $expression [description]
     */
    public function __construct(ExpressionLanguage $expression)
    {
        $this->expression = $expression;
    }

    /**
     * [setRecipient description]
     * @param User $user [description]
     */
    public function setRecipient(User $user)
    {
        $this->recipient = $user;

        return $this;
    }

    /**
     * [getRecipient description]
     * @return [type] [description]
     */
    public function getRecipient()
    {
        return $this->recipient;
    }

    /**
     * [setSubject description]
     * @param [type] $subject [description]
     */
    public function setSubject($subject)
    {
        Arr::set($this->settings, 'subject', $subject);

        return $this;
    }

    /**
     * [getSubject description]
     * @return [type] [description]
     */
    public function getSubject()
    {
        return Arr::get($this->settings, 'subject', null);
    }

    /**
     * [setView description]
     * @param [type] $view [description]
     */
    public function setView($view)
    {
        Arr::set($this->settings, 'view', $view);

        return $this;
    }

    /**
     * [getView description]
     * @return [type] [description]
     */
    public function getView()
    {
        return Arr::get($this->settings, 'view', null);
    }

    /**
     * [setData description]
     * @param array $data [description]
     */
    public function setData(array $data)
    {
        if ($this->evaluateData($data)) {
            $this->data = $data;
        }

        return $this;
    }

    /**
     * [getData description]
     * @return [type] [description]
     */
    public function getData()
    {
        return $this->data;
    }

    /**
     * [notify description]
     * @return [type] [description]
     */
    public function notify()
    {
        return $this->recipient->notify($this->getSubject, $this->getView(), $this->getData());
    }

    /**
     * [evaluateData description]
     * @param  [type] $data [description]
     * @return [type]       [description]
     */
    protected function evaluateData($data)
    {
        $rule = $this->buildExpressionRule();

        return $this->expression->evaluate($rule, ['data' => $data]);
    }

    /**
     * [buildExpressionRule description]
     * @return [type] [description]
     */
    protected function buildExpressionRule()
    {   
        $variables = [];
        foreach ($this->variables as $variable) {
            $variables[] = 'data["'.$variable.'"]';
        }
        return implode(' in data and ', $variables);
    }

}

ActivationNotifier.php

<?php namespace Support\Notifier;

class ActivationNotifier extends AbstractableNotifier {

    protected $settings = [
        'subject' => 'Account activation notification',
        'view' => 'app::emails.notifier.activation'
    ];

    protected $variables = [
        'first_name',
        'last_name',
    ];

}

Sample.php

Route::get('expression', function () {
    $test = ['first_name' => 'Foo', 'last_name' => 'Bar'];

    $notifier = App::make('notifier.activation')->setData($test);

});