adapter interface and adapter classes
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Authored by jgleeson on Wed, Mar 15, 10:30 PM.

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	F36913662: adapter interface and adapter classes
	Wed, Mar 15, 10:30 PM

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	// Adapter Interface
	interface UserAdapter {
	public function getUser($userId);
	}

	// Adapter Class for External System 1
	class ExternalSystem1Adapter implements UserAdapter {
	private $gateway;

	public function __construct(UserGateway $gateway) {
	$this->gateway = $gateway;
	}

	public function getUser($userId) {
	$userData = $this->gateway->getUserData($userId);

	return [
	'id' => $userData['id'],
	'name' => $userData['name'],
	'email' => $userData['email']
	];
	}
	}

	// Adapter Class for External System 2
	class ExternalSystem2Adapter implements UserAdapter {
	private $gateway;

	public function __construct(UserGateway $gateway) {
	$this->gateway = $gateway;
	}

	public function getUser($userId) {
	$userData = $this->gateway->getUserData($userId);

	return [
	'id' => $userData['userId'],
	'name' => $userData['userName'],
	'email' => $userData['userEmail']
	];
	}
	}

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