104 lines
4.0 KiB
Swift
104 lines
4.0 KiB
Swift
//
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// Copyright (c) 2019 Touch Instinct
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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//
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import RxSwift
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public extension Error {
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var requestError: RequestError? {
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self as? RequestError
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}
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/// Method that tries to serialize response from a mapping request error to a model
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///
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/// - Parameter decoder: json decoder to decode response data
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/// - Returns: optional target object
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/// - Throws: an error during decoding
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func handleMappingError<T: Decodable>(with decoder: JSONDecoder = JSONDecoder()) throws -> T? {
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guard let self = requestError, case .mapping(_, let response, _) = self else {
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return nil
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}
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return try decoder.decode(T.self, from: response)
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}
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}
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public extension ObservableType {
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/// Method that handles a mapping error and serialize response to a model
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///
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/// - Parameters:
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/// - decoder: json decoder to decode response data
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/// - handler: closure that recieves serialized response
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/// - Returns: Observable on caller
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func handleMappingError<T: Decodable>(with decoder: JSONDecoder = JSONDecoder(),
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handler: @escaping ParameterClosure<T>) -> Observable<Element> {
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self.do(onError: { error in
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guard let errorModel = try error.handleMappingError(with: decoder) as T? else {
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return
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}
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handler(errorModel)
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})
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}
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}
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public extension PrimitiveSequence where Trait == SingleTrait {
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/// Method that handles a mapping error and serialize response to a model
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///
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/// - Parameters:
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/// - decoder: json decoder to decode response data
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/// - handler: closure that recieves serialized response
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/// - Returns: Single on caller
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func handleMappingError<T: Decodable>(with decoder: JSONDecoder = JSONDecoder(),
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handler: @escaping ParameterClosure<T>) -> PrimitiveSequence<Trait, Element> {
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self.do(onError: { error in
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guard let errorModel = try error.handleMappingError(with: decoder) as T? else {
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return
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}
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handler(errorModel)
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})
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}
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}
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public extension PrimitiveSequence where Trait == CompletableTrait, Element == Never {
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/// Method that handles a mapping error and serialize response to a model
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///
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/// - Parameters:
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/// - decoder: json decoder to decode response data
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/// - handler: closure that recieves serialized response
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/// - Returns: Completable
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func handleMappingError<T: Decodable>(with decoder: JSONDecoder = JSONDecoder(),
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handler: @escaping ParameterClosure<T>) -> Completable {
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self.do(onError: { error in
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guard let errorModel = try error.handleMappingError(with: decoder) as T? else {
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return
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}
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handler(errorModel)
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})
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}
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}
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