import Foundation

/// `StringDataParser` parses data and convert it to string.

public class StringDataParser: DataParser {

public enum Error: Swift.Error {

case invalidData(Data)

}

/// The string encoding of the data.

public let encoding: String.Encoding

/// Returns `StringDataParser` with the string encoding.

public init(encoding: String.Encoding = .utf8) {

self.encoding = encoding

}

// MARK: - DataParser

/// Value for `Accept` header field of HTTP request.

public var contentType: String? {

return nil

}

/// Return `String` that converted from `Data`.

/// - Throws: `StringDataParser.Error` when the parser fails to initialize `String` from `Data`.

public func parse(data: Data) throws -> Any {

guard let string = String(data: data, encoding: encoding) else {

throw Error.invalidData(data)

}

return string

}

}