Followable.php

<?php
namespace Csb\Traits;
use Csb\User;
use Csb\Follow;
/**
 * Trait Followable
 *
 * Created by Ryan Owens
 *
 * @package Csb\Traits
 */
trait Followable {
    /**
     * Append to model Boot function
     *
     * Delete the 'follow' manually when the model is deleted
     */
    protected static function bootFollowable() {
        static::deleting(function($model) {
            $follows = $model->follows()->get();
            foreach($follows as $follow) {
                $follow->delete();
            }
        });
    }
    /**
     *  Get a models Follows
     *
     * @return mixed
     */
    public function follows() {
        return $this->morphMany(Follow::class, 'followable');
    }
    /**
     * Apply a 'follow' on the model from the given user
     *
     * @param User $user
     * @return mixed
     */
    public function follow(User $user) {
        $attributes = [
            'user_id' => $user->id,
            'followable_id' => $this->id,
            'followable_type' => get_class($this),
        ];
        if(!$this->follows()->where($attributes)->exists()) {
            $this->follows()->create($attributes);
        }
        $this->save();
    }
    /**
     * Remove a 'follow' on the model from the given user
     *
     * @param User $user
     */
    public function unFollow(User $user)
    {
        $attributes = [
            'user_id' => $user->id
        ];
        $this->follows()->where($attributes)->each(function($follow){
            $follow->delete(); // calls $favorite static::deleting()
        });
    }
    /**
     * Check if the model has a 'follow' from the given user
     *
     * @param User $user
     * @return bool
     */
    public function followed(User $user)
    {
        $attributes = [
            'user_id' => $user->id
        ];
        return !! $this->follows()->where($attributes)->count();
    }
}