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"Time ago" function for Swift (based on MatthewYork's DateTools for Objective-C)
func timeAgoSinceDate(date:NSDate, numericDates:Bool) -> String {
let calendar = NSCalendar.currentCalendar()
let unitFlags = NSCalendarUnit.CalendarUnitMinute | NSCalendarUnit.CalendarUnitHour | NSCalendarUnit.CalendarUnitDay | NSCalendarUnit.CalendarUnitWeekOfYear | NSCalendarUnit.CalendarUnitMonth | NSCalendarUnit.CalendarUnitYear | NSCalendarUnit.CalendarUnitSecond
let now = NSDate()
let earliest = now.earlierDate(date)
let latest = (earliest == now) ? date : now
let components:NSDateComponents = calendar.components(unitFlags, fromDate: earliest, toDate: latest, options: nil)
if (components.year >= 2) {
return "\(components.year) years ago"
} else if (components.year >= 1){
if (numericDates){
return "1 year ago"
} else {
return "Last year"
}
} else if (components.month >= 2) {
return "\(components.month) months ago"
} else if (components.month >= 1){
if (numericDates){
return "1 month ago"
} else {
return "Last month"
}
} else if (components.weekOfYear >= 2) {
return "\(components.weekOfYear) weeks ago"
} else if (components.weekOfYear >= 1){
if (numericDates){
return "1 week ago"
} else {
return "Last week"
}
} else if (components.day >= 2) {
return "\(components.day) days ago"
} else if (components.day >= 1){
if (numericDates){
return "1 day ago"
} else {
return "Yesterday"
}
} else if (components.hour >= 2) {
return "\(components.hour) hours ago"
} else if (components.hour >= 1){
if (numericDates){
return "1 hour ago"
} else {
return "An hour ago"
}
} else if (components.minute >= 2) {
return "\(components.minute) minutes ago"
} else if (components.minute >= 1){
if (numericDates){
return "1 minute ago"
} else {
return "A minute ago"
}
} else if (components.second >= 3) {
return "\(components.second) seconds ago"
} else {
return "Just now"
}
}
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