HigherOrderCollectionProxy.php

TLDR

This file contains the implementation of the HigherOrderCollectionProxy class, which is a proxy for accessing attributes and calling methods on items in a collection.

Classes

HigherOrderCollectionProxy

This class is a proxy for accessing attributes and calling methods on items in a collection. It has the following properties:

• $collection: The collection being operated on.
• $method: The method being proxied.

The class has the following methods:

• __construct($collection, $method): Initializes a new proxy instance with the given collection and method.
• __get($key): Proxies accessing an attribute onto the collection items.
• __call($method, $parameters): Proxies a method call onto the collection items.

<?php

namespace Illuminate\Support;

/**
 * @mixin \Illuminate\Support\Enumerable
 */
class HigherOrderCollectionProxy
{
    /**
     * The collection being operated on.
     *
     * @var \Illuminate\Support\Enumerable
     */
    protected $collection;

    /**
     * The method being proxied.
     *
     * @var string
     */
    protected $method;

    /**
     * Create a new proxy instance.
     *
     * @param  \Illuminate\Support\Enumerable  $collection
     * @param  string  $method
     * @return void
     */
    public function __construct(Enumerable $collection, $method)
    {
        $this->method = $method;
        $this->collection = $collection;
    }

    /**
     * Proxy accessing an attribute onto the collection items.
     *
     * @param  string  $key
     * @return mixed
     */
    public function __get($key)
    {
        return $this->collection->{$this->method}(function ($value) use ($key) {
            return is_array($value) ? $value[$key] : $value->{$key};
        });
    }

    /**
     * Proxy a method call onto the collection items.
     *
     * @param  string  $method
     * @param  array  $parameters
     * @return mixed
     */
    public function __call($method, $parameters)
    {
        return $this->collection->{$this->method}(function ($value) use ($method, $parameters) {
            return $value->{$method}(...$parameters);
        });
    }
}