Attachment.swift

import Foundation

public struct Attachment: Codable, Equatable, Hashable {

    public enum Extension: Int64, Codable, CaseIterable {
        case image
        case audio

        public static func from(_ string: String) -> Extension? {
            self.allCases.first{ $0.written == string }
        }

        public var written: String {
            switch self {
            case .image:
                return "jpeg"
            case .audio:
                return "m4a"
            }
        }

        public var writtenExtended: String {
            switch self {
            case .image:
                return "image"
            case .audio:
                return "voice message"
            }
        }
    }

    public let data: Data?
    public let name: String
    public var transferId: Data?
    public let _extension: Extension
    public var progress: Float = 0.0

    public init(
        name: String,
        data: Data? = nil,
        transferId: Data? = nil,
        _extension: Extension
    ) {
        self.data = data
        self.name = name
        self._extension = _extension
        self.transferId = transferId
    }
}