ClientRegistration.php

<?php
	namespace Pdsinterop\PhpSolid;

	use Pdsinterop\PhpSolid\Db;

	class ClientRegistration {
		public static function getRegistration($clientId) {
			Db::connect();
			$query = Db::$pdo->prepare(
				'SELECT clientData FROM clients WHERE clientId=:clientId'
			);
			$query->execute([
				':clientId' => $clientId
			]);
			$result = $query->fetchAll();
			if (sizeof($result) === 1) {
				return json_decode($result[0]['clientData'], true);
			}
			if (preg_match("/^http(s)?:/", $clientId)) {
				$clientData = self::getRemoteRegistration($clientId);
				if (!isset($clientData['origin']) && isset($clientData['client_uri'])) {
					$clientData['origin'] = preg_replace("/\/$/", "", $clientData['client_uri']);
				}
				self::saveClientRegistration($clientData);
				return $clientData;
			}
			return false;
		}

		public static function getRemoteRegistration($url) {
			$clientDocument = file_get_contents($url);
			$clientRegistration = json_decode($clientDocument, true);
			if (!isset($clientRegistration['client_id'])) {
				throw new \Exception("No client ID found in client document");
			}
			if (!isset($clientRegistration['redirect_uris'])) {
				throw new \Exception("No redirect URIs found in client document");
			}
			return $clientRegistration;
		}

		public static function saveClientRegistration($clientData) {
			Db::connect();
			if (!isset($clientData['client_name'])) {
				$clientData['client_name'] = $clientData['origin'];
			}
			$query = Db::$pdo->prepare(
				'INSERT INTO clients VALUES(:clientId, :origin, :clientData)'
			);
			$query->execute([
				':clientId' => $clientData['client_id'],
				':origin' => $clientData['origin'],
				':clientData' => json_encode($clientData)
			]);
		}
		
		public static function getClientByOrigin($origin) {
			Db::connect();
			$query = Db::$pdo->prepare(
				'SELECT clientData FROM clients WHERE origin=:origin'
			);
			$query->execute([
				':origin' => $origin
			]);
			$result = $query->fetchAll();
			
			if (sizeof($result)=== 1) {
				return json_decode($result[0]['clientData'], true);
			}
			return false;
		}
	}