mastodon-ios/MastodonSDK/Sources/MastodonUI/Extension/Date.swift

115 lines
4.3 KiB
Swift

//
// Date.swift
// Mastodon
//
// Created by MainasuK Cirno on 2021-6-1.
//
import Foundation
import MastodonAsset
import MastodonLocalization
extension Date {
static let calendar = Calendar(identifier: .gregorian)
public static let relativeTimestampFormatter: RelativeDateTimeFormatter = {
let formatter = RelativeDateTimeFormatter()
formatter.dateTimeStyle = .numeric
formatter.unitsStyle = .full
return formatter
}()
public static let abbreviatedDateFormatter: DateFormatter = {
let formatter = DateFormatter()
formatter.dateStyle = .medium // e.g. Nov 23, 1937
formatter.timeStyle = .none // none
return formatter
}()
public var localizedSlowedTimeAgoSinceNow: String {
return self.localizedTimeAgo(since: Date(), isSlowed: true, isAbbreviated: false)
}
public var localizedTimeAgoSinceNow: String {
return self.localizedTimeAgo(since: Date(), isSlowed: false, isAbbreviated: false)
}
public func localizedTimeAgo(since date: Date, isSlowed: Bool, isAbbreviated: Bool) -> String {
let earlierDate = date < self ? date : self
let latestDate = earlierDate == date ? self : date
if isSlowed, earlierDate.timeIntervalSince(latestDate) >= -60 {
return L10n.Common.Controls.Timeline.Timestamp.now
} else {
if isAbbreviated {
return latestDate.localizedShortTimeAgo(since: earlierDate)
} else {
if earlierDate.timeIntervalSince(latestDate) < -(7 * 24 * 60 * 60) {
let currentYear = Date.calendar.dateComponents([.year], from: Date())
let earlierDateYear = Date.calendar.dateComponents([.year], from: earlierDate)
if currentYear.year! > earlierDateYear.year! {
return earlierDate.formatted(.dateTime.year().month(.abbreviated).day())
} else {
return earlierDate.formatted(.dateTime.month(.abbreviated).day())
}
} else {
return Date.relativeTimestampFormatter.localizedString(for: earlierDate, relativeTo: latestDate)
}
}
}
}
}
extension Date {
public func localizedShortTimeAgo(since date: Date) -> String {
let earlierDate = date < self ? date : self
let latestDate = earlierDate == date ? self : date
let components = Date.calendar.dateComponents([.year, .month, .day, .hour, .minute, .second], from: earlierDate, to: latestDate)
if components.year! > 0 {
return L10n.Date.Year.Ago.abbr(components.year!)
} else if components.month! > 0 {
return L10n.Date.Month.Ago.abbr(components.month!)
} else if components.day! > 0 {
return L10n.Date.Day.Ago.abbr(components.day!)
} else if components.hour! > 0 {
return L10n.Date.Hour.Ago.abbr(components.hour!)
} else if components.minute! > 0 {
return L10n.Date.Minute.Ago.abbr(components.minute!)
} else if components.second! > 0 {
return L10n.Date.Year.Ago.abbr(components.second!)
} else {
return ""
}
}
public func localizedTimeLeft() -> String {
let date = Date()
let earlierDate = date < self ? date : self
let latestDate = earlierDate == date ? self : date
let components = Calendar(identifier: .gregorian).dateComponents([.year, .month, .day, .hour, .minute, .second], from: earlierDate, to: latestDate)
if components.year! > 0 {
return L10n.Date.Year.left(components.year!)
} else if components.month! > 0 {
return L10n.Date.Month.left(components.month!)
} else if components.day! > 0 {
return L10n.Date.Day.left(components.day!)
} else if components.hour! > 0 {
return L10n.Date.Hour.left(components.hour!)
} else if components.minute! > 0 {
return L10n.Date.Minute.left(components.minute!)
} else if components.second! > 0 {
return L10n.Date.Year.left(components.second!)
} else {
return ""
}
}
}