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//
// RESTCoding.swift
// RESTCoding
//
// Created by pronebird on 27/07/2021.
// Copyright © 2021 Mullvad VPN AB. All rights reserved.
//
import Foundation
extension REST {
enum Coding {}
}
extension REST.Coding {
/// Returns a JSON encoder used by REST API.
static func makeJSONEncoder() -> JSONEncoder {
let encoder = JSONEncoder()
encoder.keyEncodingStrategy = .convertToSnakeCase
encoder.dataEncodingStrategy = .base64
encoder.dateEncodingStrategy = .iso8601
return encoder
}
/// Returns a JSON decoder used by REST API.
static func makeJSONDecoder() -> JSONDecoder {
let decoder = JSONDecoder()
decoder.keyDecodingStrategy = .convertFromSnakeCase
decoder.dataDecodingStrategy = .base64
let iso8601Formatter = ISO8601DateFormatter()
// Setup additional formatter to account for fractional seconds returned
// by some of the API calls.
lazy var iso8601WithSubSecondsFormatter: ISO8601DateFormatter = {
let formatter = ISO8601DateFormatter()
formatter.formatOptions.insert(.withFractionalSeconds)
return formatter
}()
decoder.dateDecodingStrategy = .custom({ decoder in
let container = try decoder.singleValueContainer()
let value = try container.decode(String.self)
let date = iso8601Formatter.date(from: value) ??
iso8601WithSubSecondsFormatter.date(from: value)
switch date {
case .some(let parsedDate):
return parsedDate
case .none:
throw DecodingError.dataCorruptedError(
in: container,
debugDescription: "Expected date string to be RFC3339 or ISO8601-formatted."
)
}
})
return decoder
}
}
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