58 lines
1.7 KiB
Swift
58 lines
1.7 KiB
Swift
// Copyright © 2020 Metabolist. All rights reserved.
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import Foundation
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import Combine
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import Alamofire
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typealias Session = Alamofire.Session
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class HTTPClient {
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private let session: Session
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private let decoder: DataDecoder
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init(session: Session, decoder: DataDecoder) {
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self.session = session
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self.decoder = decoder
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}
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func request<T: DecodableTarget>(_ target: T) -> AnyPublisher<T.ResultType, Error> {
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requestPublisher(target).value().mapError { $0 as Error }.eraseToAnyPublisher()
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}
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func request<T: DecodableTarget, E: Error & Decodable>(
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_ target: T,
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decodeErrorsAs errorType: E.Type) -> AnyPublisher<T.ResultType, Error> {
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let decoder = self.decoder
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return requestPublisher(target)
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.tryMap { response -> T.ResultType in
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switch response.result {
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case let .success(decoded): return decoded
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case let .failure(error):
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if
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let data = response.data,
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let decodedError = try? decoder.decode(E.self, from: data) {
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throw decodedError
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}
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throw error
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}
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}
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.eraseToAnyPublisher()
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}
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}
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private extension HTTPClient {
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private func requestPublisher<T: DecodableTarget>(_ target: T) -> DataResponsePublisher<T.ResultType> {
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#if DEBUG
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if let url = try? target.asURLRequest().url {
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StubbingURLProtocol.setTarget(target, forURL: url)
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}
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#endif
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return session.request(target)
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.validate()
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.publishDecodable(type: T.ResultType.self, decoder: decoder)
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}
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}
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