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Edit File: Avatar.php

<?php

namespace Laravel\Telescope;

use Closure;
use Illuminate\Support\Str;

class Avatar
{
    /**
     * The callback that should be used to get the Telescope user avatar.
     *
     * @var \Closure
     */
    protected static $callback;

/**
     * Get an avatar URL for an entry user.
     *
     * @param  array  $user
     * @return string|null
     */
    public static function url(array $user)
    {
        if (empty($user['email'])) {
            return;
        }

if (isset(static::$callback)) {
            return static::resolve($user);
        }

return 'https://www.gravatar.com/avatar/'.md5(Str::lower($user['email'])).'?s=200';
    }

/**
     * Register the Telescope user avatar callback.
     *
     * @param  \Closure  $callback
     */
    public static function register(Closure $callback)
    {
        static::$callback = $callback;
    }

/**
     * Find the custom avatar for a user.
     *
     * @param  array  $user
     * @return string|null
     */
    protected static function resolve($user)
    {
        if (static::$callback !== null) {
            return call_user_func(static::$callback, $user['id'], $user['email']);
        }
    }
}

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