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RequestBuilder.swift
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RequestBuilder.swift
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import Foundation
#if canImport(Combine)
import Combine
#endif
typealias QueryParametersType = [URLQueryItem]
extension Restler {
public final class RequestBuilder {
private let dependencies: Dependencies
private var form: Form
// MARK: - Initialization
internal init(
dependencies: Dependencies,
header: Restler.Header,
errorParser: RestlerErrorParserType
) {
self.dependencies = dependencies
self.form = Form(
header: header,
errorParser: errorParser)
}
}
}
// MARK: - Structures
extension Restler.RequestBuilder {
struct Dependencies {
let url: URL
let networking: NetworkingType
let encoder: RestlerJSONEncoderType
let decoder: RestlerJSONDecoderType
let queryEncoder: RestlerQueryEncoderType
let multipartEncoder: RestlerMultipartEncoderType
let dispatchQueueManager: DispatchQueueManagerType
let eventLogger: EventLoggerLogging
let method: HTTPMethod
}
struct Form {
var header: Restler.Header
var errorParser: RestlerErrorParserType
var query: QueryParametersType?
var body: Data?
var errors: [Restler.Error] = []
var customRequestModification: ((inout URLRequest) -> Void)?
var builderErrorsHandler: ((Restler.Error) -> Void)?
var customDispatchQueue: DispatchQueue?
var downloadResumeData: Data?
}
}
// MARK: - RestlerBasicRequestBuilderType
extension Restler.RequestBuilder: RestlerBasicRequestBuilderType {
public func setInHeader(_ value: String?, forKey key: Restler.Header.Key) -> Self {
self.form.header[key] = value
return self
}
public func failureDecode<T>(_ type: T.Type) -> Self where T: RestlerErrorDecodable {
self.form.errorParser.decode(type)
return self
}
public func customRequestModification(_ modification: ((inout URLRequest) -> Void)?) -> Self {
self.form.customRequestModification = modification
return self
}
public func catching(_ handler: ((Restler.Error) -> Void)?) -> Self {
self.form.builderErrorsHandler = handler
return self
}
public func receive(on queue: DispatchQueue?) -> Self {
self.form.customDispatchQueue = queue
return self
}
public func decode(_ type: Void.Type) -> Restler.Request<Void> {
Restler.VoidRequest(dependencies: .init(
dependencies: self.dependencies,
form: self.form,
urlRequest: self.urlRequest()))
}
public func urlRequest() -> URLRequest? {
if let error = self.form.errors.single() {
self.form.builderErrorsHandler?(error)
return nil
}
let requestData = RequestData(
url: self.dependencies.url,
method: self.dependencies.method,
content: self.form.body,
query: self.form.query ?? [],
header: self.form.header)
return self.dependencies.networking.buildRequest(
requestData: requestData,
customRequestModification: self.form.customRequestModification)
}
#if canImport(Combine)
@available(OSX 10.15, iOS 13.0, tvOS 13.0, watchOS 6.0, *)
public func publisher() -> AnyPublisher<URLSession.DataTaskPublisher.Output, URLSession.DataTaskPublisher.Failure>? {
guard let request = self.urlRequest() else { return nil }
return self.dependencies.networking.getPublisher(
urlRequest: request,
eventLogger: self.dependencies.eventLogger)
}
#endif
}
// MARK: - RestlerQueryRequestBuilderType
extension Restler.RequestBuilder: RestlerQueryRequestBuilderType {
public func query<E>(_ object: E) -> Self where E: RestlerQueryEncodable {
do {
self.form.query = try self.dependencies.queryEncoder.encode(object)
} catch {
self.form.errors.append(Restler.Error.common(type: .invalidParameters, base: error))
}
return self
}
}
// MARK: - RestlerBodyRequestBuilderType
extension Restler.RequestBuilder: RestlerBodyRequestBuilderType {
public func body<E>(_ object: E) -> Self where E: Encodable {
do {
self.form.body = try self.dependencies.encoder.encode(object)
self.form.header[.contentType] = "application/json"
} catch {
self.form.errors.append(Restler.Error.common(type: .invalidParameters, base: error))
}
return self
}
}
// MARK: - RestlerMultipartRequestBuilderType
extension Restler.RequestBuilder: RestlerMultipartRequestBuilderType {
public func multipart<E>(_ object: E, boundary: String? = nil) -> Self where E: RestlerMultipartEncodable {
do {
let unwrappedBoundary = boundary ?? "Boundary--\(UUID().uuidString)"
self.form.body = try self.dependencies.multipartEncoder.encode(object, boundary: unwrappedBoundary)
self.form.header[.contentType] = "multipart/form-data; charset=utf-8; boundary=\(unwrappedBoundary)"
} catch {
self.form.errors.append(Restler.Error.common(type: .invalidParameters, base: error))
}
return self
}
}
// MARK: - RestlerDecodableResponseRequestBuilderType
extension Restler.RequestBuilder: RestlerDecodableResponseRequestBuilderType {
public func decode<T>(_ type: T?.Type) -> Restler.Request<T?> where T: Decodable {
Restler.OptionalDecodableRequest<T>(dependencies: .init(
dependencies: self.dependencies,
form: self.form,
urlRequest: self.urlRequest()))
}
public func decode<T>(_ type: T.Type) -> Restler.Request<T> where T: Decodable {
Restler.DecodableRequest<T>(dependencies: .init(
dependencies: self.dependencies,
form: self.form,
urlRequest: self.urlRequest()))
}
}
// MARK: - RestlerDownloadRequestBuilderType
extension Restler.RequestBuilder: RestlerDownloadRequestBuilderType {
public func resumeData(_ data: Data) -> Self {
self.form.downloadResumeData = data
return self
}
public func requestDownload() -> RestlerDownloadRequestType {
Restler.DownloadRequest(
dependencies: .init(
dependencies: self.dependencies,
form: self.form,
urlRequest: self.urlRequest()))
}
}