Human "time ago" for swift

time-ago.swift

import Foundation

extension Date {
    
    func timeAgo() -> String {
        
        let calendar = Calendar.current
        
        let seconds  = calendar.dateComponents([.second], from: self, to: Date()).second!
        let minutes  = calendar.dateComponents([.minute], from: self, to: Date()).minute!
        let hours    = calendar.dateComponents([.hour], from: self, to: Date()).hour!
        let days     = calendar.dateComponents([.day], from: self, to: Date()).day!
        let weeks    = calendar.dateComponents([.weekOfMonth], from: self, to: Date()).weekOfMonth!
        let months   = calendar.dateComponents([.month], from: self, to: Date()).month!
        let years    = calendar.dateComponents([.year], from: self, to: Date()).year!
        
        if (seconds < 60) {
            return NSLocalizedString("Just now", comment: "Very recent")
        } else if (minutes < 60) {
            return "\(minutes)\(NSLocalizedString("m ago", comment: "Minutes ago"))"
        } else if (hours < 24) {
            return (hours == 1) ? "\(hours)\(NSLocalizedString("hr ago", comment: "One hour ago"))" : "\(hours)\(NSLocalizedString("hrs ago", comment: "Hours ago"))"
        } else if (days < 14) {
            return (days == 1) ? "\(days) \(NSLocalizedString("day ago", comment: "One day ago"))" : "\(days) \(NSLocalizedString("days ago", comment: "Days ago"))"
        } else if (days < 31) {
            return (weeks == 1) ? "\(weeks) \(NSLocalizedString("week ago", comment: "One week ago"))" : "\(weeks) \(NSLocalizedString("weeks ago", comment: "Weeks ago"))"
        } else if (months < 12) {
            return (months == 1) ? "\(months) \(NSLocalizedString("month ago", comment: "One month ago"))" : "\(months) \(NSLocalizedString("months ago", comment: "Months ago"))"
        } else {
            return (years == 1) ? "\(years) \(NSLocalizedString("year ago", comment: "One year ago"))" : "\(years) \(NSLocalizedString("years ago", comment: "Years ago"))"
        }
    }
    
}

extension NSDate {
    
    func timeAgo() -> String {
        let date = self as Date
        return date.timeAgo()
    }
    
}


var date = Date()


let nsdate = NSDate()

nsdate.timeAgo() == "Just now"

DateFormatter.localizedString(from: nsdate as Date, dateStyle: .short, timeStyle: .short)


date = Date(timeInterval: -1, since: Date())
date.timeAgo() == "Just now"

date = Date(timeInterval: -60, since: Date())
date.timeAgo() == "1m ago"

print(date.timeAgo())
date.timeAgo() == "3m ago"

date = Date(timeInterval: -(60 * 60), since: Date())
date.timeAgo() == "1hr ago"

date = Date(timeInterval: -((60 * 60) * 3), since: Date())
date.timeAgo() == "3hrs ago"

date = Date(timeInterval: -(60 * 60 * 24), since: Date())
date.timeAgo() == "1 day ago"

date = Date(timeInterval: -(((60 * 60 * 24) * 7)), since: Date())
date.timeAgo() == "7 days ago"

date = Date(timeInterval: -((60 * 60 * 24) * 13), since: Date())
date.timeAgo() == "13 days ago"

date = Date(timeInterval: -((60 * 60 * 24) * 14), since: Date())
date.timeAgo() == "2 weeks ago"

date = Date(timeInterval: -(((60 * 60 * 24) * 22)), since: Date())
date.timeAgo() == "3 weeks ago"

date = Date(timeInterval: -(((60 * 60 * 24) * 31)), since: Date())
date.timeAgo() == "1 month ago"

date = Date(timeInterval: -((((60 * 60 * 24) * 31) * 4)), since: Date())
date.timeAgo() == "4 months ago"

date = Date(timeInterval: -((60 * 60 * 24) * 366), since: Date())
date.timeAgo() == "1 year ago"

date = Date(timeInterval: -(((60 * 60 * 24) * 366) * 5), since: Date())
date.timeAgo() == "5 years ago"

date = Date(timeInterval: -((60 * 60 * 24) * 365), since: Date())
print(date.timeAgo())

date = Date(timeInterval: -(((60 * 60 * 24) * 365) * 5), since: Date())
print(date.timeAgo())