Sindbad~EG File Manager

<?php

namespace WPOAuth2;

use WPOAuth2\Storage\Memory;
use WPOAuth2\Storage\ScopeInterface as ScopeStorageInterface;

/**
 * @see OAuth2\ScopeInterface
 */
class Scope implements ScopeInterface {

	protected $storage;

	/**
	 * @param mixed @storage
	 * Either an array of supported scopes, or an instance of OAuth2\Storage\ScopeInterface
	 */
	public function __construct( $storage = null ) {
		if ( is_null( $storage ) || is_array( $storage ) ) {
			$storage = new Memory( (array) $storage );
		}

		if ( ! $storage instanceof ScopeStorageInterface ) {
			throw new \InvalidArgumentException( 'Argument 1 to OAuth2\Scope must be null, an array, or instance of OAuth2\Storage\ScopeInterface' );
		}

		$this->storage = $storage;
	}

	/**
	 * Check if everything in required scope is contained in available scope.
	 *
	 * @param $required_scope
	 * A space-separated string of scopes.
	 *
	 * @return
	 * TRUE if everything in required scope is contained in available scope,
	 * and FALSE if it isn't.
	 *
	 * @see http://tools.ietf.org/html/rfc6749#section-7
	 *
	 * @ingroup oauth2_section_7
	 */
	public function checkScope( $required_scope, $available_scope ) {
		$required_scope  = explode( ' ', trim( $required_scope ) );
		$available_scope = explode( ' ', trim( $available_scope ) );

		return ( count( array_diff( $required_scope, $available_scope ) ) == 0 );
	}

	/**
	 * Check if the provided scope exists in storage.
	 *
	 * @param $scope
	 * A space-separated string of scopes.
	 *
	 * @return
	 * TRUE if it exists, FALSE otherwise.
	 */
	public function scopeExists( $scope ) {
		// Check reserved scopes first.
		$scope             = explode( ' ', trim( $scope ) );
		$reservedScope     = $this->getReservedScopes();
		$nonReservedScopes = array_diff( $scope, $reservedScope );
		if ( count( $nonReservedScopes ) == 0 ) {
			return true;
		} else {
			// Check the storage for non-reserved scopes.
			$nonReservedScopes = implode( ' ', $nonReservedScopes );

			return $this->storage->scopeExists( $nonReservedScopes );
		}
	}

	public function getScopeFromRequest( RequestInterface $request ) {
		// "scope" is valid if passed in either POST or QUERY
		return $request->request( 'scope', $request->query( 'scope' ) );
	}

	public function getDefaultScope( $client_id = null ) {
		return $this->storage->getDefaultScope( $client_id );
	}

	/**
	 * Get reserved scopes needed by the server.
	 *
	 * In case OpenID Connect is used, these scopes must include:
	 * 'openid', offline_access'.
	 *
	 * @return
	 * An array of reserved scopes.
	 */
	public function getReservedScopes() {
		return array( 'openid', 'offline_access' );
	}
}