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//
// RESTAPIProxy.swift
// MullvadVPN
//
// Created by pronebird on 10/07/2020.
// Copyright © 2020 Mullvad VPN AB. All rights reserved.
//
import Foundation
import Network
import class WireGuardKitTypes.PublicKey
import struct WireGuardKitTypes.IPAddressRange
extension REST {
class APIProxy: Proxy<ProxyConfiguration> {
init(configuration: ProxyConfiguration) {
super.init(
name: "APIProxy",
configuration: configuration,
requestFactory: RequestFactory.withDefaultAPICredentials(
pathPrefix: "/app/v1",
bodyEncoder: Coding.makeJSONEncoder()
),
responseDecoder: Coding.makeJSONDecoder()
)
}
func getAddressList(
retryStrategy: REST.RetryStrategy,
completionHandler: @escaping CompletionHandler<[AnyIPEndpoint]>
) -> Cancellable
{
let requestHandler = AnyRequestHandler { endpoint in
return try self.requestFactory.createRequest(
endpoint: endpoint,
method: .get,
pathTemplate: "api-addrs"
)
}
let responseHandler = REST.defaultResponseHandler(
decoding: [AnyIPEndpoint].self,
with: responseDecoder
)
return addOperation(
name: "get-api-addrs",
retryStrategy: retryStrategy,
requestHandler: requestHandler,
responseHandler: responseHandler,
completionHandler: completionHandler
)
}
func getRelays(
etag: String?,
retryStrategy: REST.RetryStrategy,
completionHandler: @escaping CompletionHandler<ServerRelaysCacheResponse>
) -> Cancellable
{
let requestHandler = AnyRequestHandler { endpoint in
var requestBuilder = try self.requestFactory.createRequestBuilder(
endpoint: endpoint,
method: .get,
pathTemplate: "relays"
)
if let etag = etag {
requestBuilder.setETagHeader(etag: etag)
}
return requestBuilder.getRequest()
}
let responseHandler = AnyResponseHandler { response, data -> ResponseHandlerResult<ServerRelaysCacheResponse> in
let httpStatus = HTTPStatus(rawValue: response.statusCode)
switch httpStatus {
case let httpStatus where httpStatus.isSuccess:
return .decoding {
let serverRelays = try self.responseDecoder.decode(
ServerRelaysResponse.self,
from: data
)
let newEtag = response.value(forCaseInsensitiveHTTPHeaderField: HTTPHeader.etag)
return .newContent(newEtag, serverRelays)
}
case .notModified where etag != nil:
return .success(.notModified)
default:
return .unhandledResponse(
try? self.responseDecoder.decode(
ServerErrorResponse.self,
from: data
)
)
}
}
return addOperation(
name: "get-relays",
retryStrategy: retryStrategy,
requestHandler: requestHandler,
responseHandler: responseHandler,
completionHandler: completionHandler
)
}
func createApplePayment(
accountNumber: String,
receiptString: Data,
retryStrategy: REST.RetryStrategy,
completionHandler: @escaping CompletionHandler<CreateApplePaymentResponse>
) -> Cancellable
{
let requestHandler = AnyRequestHandler { endpoint in
var requestBuilder = try self.requestFactory
.createRequestBuilder(
endpoint: endpoint,
method: .post,
pathTemplate: "create-apple-payment"
)
requestBuilder.setAuthorization(.accountNumber(accountNumber))
let body = CreateApplePaymentRequest(
receiptString: receiptString
)
try requestBuilder.setHTTPBody(value: body)
return requestBuilder.getRequest()
}
let responseHandler = AnyResponseHandler { response, data -> ResponseHandlerResult<CreateApplePaymentResponse> in
if HTTPStatus.isSuccess(response.statusCode) {
return .decoding {
let serverResponse = try self.responseDecoder.decode(
CreateApplePaymentRawResponse.self,
from: data
)
if serverResponse.timeAdded > 0 {
return .timeAdded(serverResponse.timeAdded, serverResponse.newExpiry)
} else {
return .noTimeAdded(serverResponse.newExpiry)
}
}
} else {
return .unhandledResponse(
try? self.responseDecoder.decode(
ServerErrorResponse.self,
from: data
)
)
}
}
return addOperation(
name: "create-apple-payment",
retryStrategy: retryStrategy,
requestHandler: requestHandler,
responseHandler: responseHandler,
completionHandler: completionHandler
)
}
func sendProblemReport(
_ body: ProblemReportRequest,
retryStrategy: REST.RetryStrategy,
completionHandler: @escaping CompletionHandler<Void>
) -> Cancellable
{
let requestHandler = AnyRequestHandler { endpoint in
var requestBuilder = try self.requestFactory.createRequestBuilder(
endpoint: endpoint,
method: .post,
pathTemplate: "problem-report"
)
try requestBuilder.setHTTPBody(value: body)
return requestBuilder.getRequest()
}
let responseHandler = AnyResponseHandler { response, data -> ResponseHandlerResult<Void> in
if HTTPStatus.isSuccess(response.statusCode) {
return .success(())
} else {
return .unhandledResponse(
try? self.responseDecoder.decode(
ServerErrorResponse.self,
from: data
)
)
}
}
return addOperation(
name: "send-problem-report",
retryStrategy: retryStrategy,
requestHandler: requestHandler,
responseHandler: responseHandler,
completionHandler: completionHandler
)
}
}
// MARK: - Response types
enum ServerRelaysCacheResponse {
case notModified
case newContent(_ etag: String?, _ value: ServerRelaysResponse)
}
fileprivate struct CreateApplePaymentRequest: Encodable {
let receiptString: Data
}
enum CreateApplePaymentResponse {
case noTimeAdded(_ expiry: Date)
case timeAdded(_ timeAdded: Int, _ newExpiry: Date)
var newExpiry: Date {
switch self {
case .noTimeAdded(let expiry), .timeAdded(_, let expiry):
return expiry
}
}
var timeAdded: TimeInterval {
switch self {
case .noTimeAdded:
return 0
case .timeAdded(let timeAdded, _):
return TimeInterval(timeAdded)
}
}
/// Returns a formatted string for the `timeAdded` interval, i.e "30 days"
var formattedTimeAdded: String? {
let formatter = DateComponentsFormatter()
formatter.allowedUnits = [.day, .hour]
formatter.unitsStyle = .full
return formatter.string(from: self.timeAdded)
}
}
fileprivate struct CreateApplePaymentRawResponse: Decodable {
let timeAdded: Int
let newExpiry: Date
}
struct ProblemReportRequest: Encodable {
let address: String
let message: String
let log: String
let metadata: [String: String]
}
}
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