import Foundation

extension Date {
    private static let friendlyFormatter: DateFormatter = {
        let f = DateFormatter()
        f.dateStyle = .medium
        f.timeStyle = .short
        return f
    }()

    private static let relativeFormatter: RelativeDateTimeFormatter = {
        let f = RelativeDateTimeFormatter()
        f.unitsStyle = .abbreviated
        return f
    }()

    var friendlyString: String {
        Date.friendlyFormatter.string(from: self)
    }

    var relativeString: String {
        Date.relativeFormatter.localizedString(for: self, relativeTo: Date())
    }

    var backupTimestamp: String {
        let f = DateFormatter()
        f.dateFormat = "yyyyMMdd_HHmmss"
        return f.string(from: self)
    }
}