132 lines
3.6 KiB
Swift
132 lines
3.6 KiB
Swift
/*
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MIT License
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Copyright (c) 2016 Maxim Khatskevich (maxim@khatskevi.ch)
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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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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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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 THE
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SOFTWARE.
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*/
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import Foundation
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//---
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public
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protocol URLRequestFacilitator
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{
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var session: URLSession { get }
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var sharedPrefixURL: URL { get }
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}
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// MARK: - Commands - Public
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public
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extension URLRequestFacilitator
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{
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func prepareRequest<R: RequestDefinition>(
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from definition: R
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) -> Result<URLRequest, PrepareRequestIssue>
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{
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let parametersData: Data
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do
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{
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parametersData = try R.toDataConverter(definition)
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}
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catch
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{
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return .failure(.conversionIntoDataFailed(error))
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}
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//---
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let parametersObject: Any
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do
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{
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parametersObject = try JSONSerialization
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.jsonObject(
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with: parametersData,
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options: R.dataToDictionaryConversionOptions
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)
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}
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catch
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{
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return .failure(.conversionDataIntoJSONObjectFailed(error))
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}
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//---
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guard
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let parameters = parametersObject as? Parameters
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else
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{
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return .failure(.conversionJSONObjectIntoDictionaryFailed(theObject: parametersObject))
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}
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//---
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return prepareRequest(
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R.method,
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relativePath: R.relativePath,
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parameterEncoding: R.parameterEncoding,
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parameters: parameters
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)
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}
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}
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// MARK: - Internal methods
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extension URLRequestFacilitator
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{
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func prepareRequest(
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_ method: HTTPMethod? = nil,
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relativePath: String,
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parameterEncoding: ParameterEncoding,
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parameters: Parameters? = nil
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) -> Result<URLRequest, PrepareRequestIssue>
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{
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guard
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let encodedRelativePath = relativePath
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.addingPercentEncoding(withAllowedCharacters: .urlPathAllowed)
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else
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{
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return .failure(.invalidRelativePath(relativePath))
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}
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//---
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var targetURL = sharedPrefixURL
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targetURL.appendPathComponent(encodedRelativePath)
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var result = URLRequest(url: targetURL)
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result.httpMethod = method?.rawValue
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switch parameterEncoding.encode(result, with: parameters)
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{
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case .success(let output):
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return .success(output)
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case .failure(let error):
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return .failure(.requestEncodingFailed(error))
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}
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}
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}
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