107 lines
2.9 KiB
Swift
107 lines
2.9 KiB
Swift
import Foundation
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protocol DateItem {
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var id: String { get }
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var startDate: Date { get }
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var hasEndDate: Bool { get }
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var potentialEndDate: Date { get }
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}
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extension Sequence where Element: DateItem {
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func sortedByStartDateAndId() -> [Element] {
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sorted { (lhs, rhs) -> Bool in
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if lhs.startDate == rhs.startDate {
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return lhs.id < rhs.id
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}
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return lhs.startDate > rhs.startDate
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}
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}
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}
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extension DateItem {
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var endDate: Date? {
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hasEndDate ? potentialEndDate : nil
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}
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func dateText(in language: ContentLanguage) -> String {
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guard let endDate else {
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return DateItemStorage.dateString(for: startDate, in: language)
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}
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let endText = DateItemStorage.dateString(for: potentialEndDate, in: language)
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let prefix = DateItemStorage.datePrefixString(from: startDate, to: endDate, in: language)
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return prefix + " - " + endText
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}
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}
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private enum DateItemStorage {
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static func datePrefixString(from start: Date, to end: Date, in language: ContentLanguage) -> String {
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guard Calendar.current.isDate(start, equalTo: end, toGranularity: .year) else {
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// Different year, return full string
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return DateItemStorage.dateString(for: start, in: language)
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}
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guard Calendar.current.isDate(start, equalTo: end, toGranularity: .month) else {
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// Different month
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return DateItemStorage.dayAndMonth(of: start, in: language)
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}
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return DateItemStorage.day.string(from: start)
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}
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static let englishDate: DateFormatter = {
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let df = DateFormatter()
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df.locale = .init(identifier: "en")
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df.dateFormat = "d. MMMM yyyy"
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return df
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}()
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static let germanDate: DateFormatter = {
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let df = DateFormatter()
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df.locale = .init(identifier: "de")
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df.dateFormat = "d. MMMM yyyy"
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return df
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}()
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static let englishDayAndMonth: DateFormatter = {
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let df = DateFormatter()
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df.locale = .init(identifier: "en")
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df.dateFormat = "d. MMMM"
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return df
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}()
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static let germanDayAndMonth: DateFormatter = {
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let df = DateFormatter()
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df.locale = .init(identifier: "de")
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df.dateFormat = "d. MMMM"
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return df
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}()
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static let day: DateFormatter = {
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let df = DateFormatter()
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df.dateFormat = "d."
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return df
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}()
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static func dayAndMonth(of date: Date, in language: ContentLanguage) -> String {
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switch language {
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case .english: return englishDayAndMonth.string(from: date)
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case .german: return germanDayAndMonth.string(from: date)
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}
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}
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static func dateString(for date: Date, in language: ContentLanguage) -> String {
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switch language {
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case .english: return englishDate.string(from: date)
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case .german: return germanDate.string(from: date)
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}
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}
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}
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