ALB.swift

//===----------------------------------------------------------------------===//
//
// This source file is part of the SwiftAWSLambdaRuntime open source project
//
// Copyright (c) 2017-2020 Apple Inc. and the SwiftAWSLambdaRuntime project authors
// Licensed under Apache License v2.0
//
// See LICENSE.txt for license information
// See CONTRIBUTORS.txt for the list of SwiftAWSLambdaRuntime project authors
//
// SPDX-License-Identifier: Apache-2.0
//
//===----------------------------------------------------------------------===//

import class Foundation.JSONEncoder

// https://github.com/aws/aws-lambda-go/blob/master/events/alb.go
public enum ALB {
    /// ALBTargetGroupRequest contains data originating from the ALB Lambda target group integration
    public struct TargetGroupRequest: Codable {
        /// ALBTargetGroupRequestContext contains the information to identify the load balancer invoking the lambda
        public struct Context: Codable {
            public let elb: ELBContext
        }

        public let httpMethod: HTTPMethod
        public let path: String
        public let queryStringParameters: [String: [String]]

        /// Depending on your configuration of your target group either `headers` or `multiValueHeaders`
        /// are set.
        ///
        /// For more information visit:
        /// https://docs.aws.amazon.com/elasticloadbalancing/latest/application/lambda-functions.html#multi-value-headers
        public let headers: HTTPHeaders?

        /// Depending on your configuration of your target group either `headers` or `multiValueHeaders`
        /// are set.
        ///
        /// For more information visit:
        /// https://docs.aws.amazon.com/elasticloadbalancing/latest/application/lambda-functions.html#multi-value-headers
        public let multiValueHeaders: HTTPMultiValueHeaders?
        public let requestContext: Context
        public let isBase64Encoded: Bool
        public let body: String?
    }

    /// ELBContext contains the information to identify the ARN invoking the lambda
    public struct ELBContext: Codable {
        public let targetGroupArn: String
    }

    public struct TargetGroupResponse: Codable {
        public let statusCode: HTTPResponseStatus
        public let statusDescription: String?
        public let headers: HTTPHeaders?
        public let multiValueHeaders: HTTPMultiValueHeaders?
        public let body: String
        public let isBase64Encoded: Bool

        public init(
            statusCode: HTTPResponseStatus,
            statusDescription: String? = nil,
            headers: HTTPHeaders? = nil,
            multiValueHeaders: HTTPMultiValueHeaders? = nil,
            body: String = "",
            isBase64Encoded: Bool = false
        ) {
            self.statusCode = statusCode
            self.statusDescription = statusDescription
            self.headers = headers
            self.multiValueHeaders = multiValueHeaders
            self.body = body
            self.isBase64Encoded = isBase64Encoded
        }
    }
}