iOS

Why use final class instead of class for the cache implementation?

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// Service that sends requests (get/post), url, forming requests depending on semantics (decode/encode)

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// Enum for HTTP methods enum HTTPMethod: String { case post = "POST" } // Enum for errors enum Errors: Error { case invalidUrl case invalidQuery case invalidResponse case httpStatus(Int) } // Protocol for decoding protocol MyDecoder { func decode<T: Decodable>(_: T.Type, from data: Data) throws -> T } // Network service class final class NetworkService { private let session: URLSession private let encoder = JSONEncoder() private let decoder: MyDecoder init( session: URLSession = .shared, decoder: MyDecoder ) { self.session = session self.decoder = decoder } // Request method func request<Response: Decodable, Body: Encodable>( urlString: String, method: HTTPMethod, body: Body? = nil, headers: [String: String] = [:], query: [String: String] = [:] ) async throws -> Response { guard var components = URLComponents(string: urlString) else { throw Errors.invalidUrl } if !query.isEmpty { components.queryItems = query.map { URLQueryItem(name: $0.key, value: $0.value) } } guard let url = components.url else { throw Errors.invalidQuery } var request = URLRequest(url: url)

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