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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2020 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
#if canImport(FoundationEssentials)
import FoundationEssentials
#endif
// MARK: VerbatimFormatStyle Definition
@available(macOS 12.0, iOS 15.0, tvOS 15.0, watchOS 8.0, *)
extension Date {
/// Formats a `Date` using the given format.
public struct VerbatimFormatStyle : Sendable {
public var timeZone: TimeZone
public var calendar: Calendar
/// Use system locale if nil or unspecified.
public var locale: Locale?
var formatPattern: String
public init(format: FormatString, locale: Locale? = nil, timeZone: TimeZone, calendar: Calendar) {
self.formatPattern = format.rawFormat
self.calendar = calendar
self.locale = locale
self.timeZone = timeZone
}
/// Returns a type erased attributed variant of this style.
@available(macOS, deprecated: 15, introduced: 12, message: "Use attributedStyle instead")
@available(iOS, deprecated: 18, introduced: 15, message: "Use attributedStyle instead")
@available(tvOS, deprecated: 18, introduced: 15, message: "Use attributedStyle instead")
@available(watchOS, deprecated: 11, introduced: 8, message: "Use attributedStyle instead")
public var attributed: AttributedStyle {
.init(style: .verbatimFormatStyle(self))
}
public func format(_ value: Date) -> String {
guard let fm = ICUDateFormatter.cachedFormatter(for: self), let result = fm.format(value) else {
return value.description
}
return result
}
public func locale(_ locale: Locale) -> Date.VerbatimFormatStyle {
var new = self
new.locale = locale
return new
}
}
}
@available(macOS 12.0, iOS 15.0, tvOS 15.0, watchOS 8.0, *)
extension Date.VerbatimFormatStyle : FormatStyle {}
@available(macOS 13.0, iOS 16.0, tvOS 16.0, watchOS 9.0, *)
extension FormatStyle where Self == Date.VerbatimFormatStyle {
public static func verbatim(_ format: Date.FormatString, locale: Locale? = nil, timeZone: TimeZone, calendar: Calendar) -> Date.VerbatimFormatStyle { .init(format: format, locale: locale, timeZone: timeZone, calendar: calendar) }
}
// MARK: ParseableFormatStyle Conformance
@available(macOS 12.0, iOS 15.0, tvOS 15.0, watchOS 8.0, *)
extension Date.VerbatimFormatStyle: ParseableFormatStyle {
public var parseStrategy: Date.ParseStrategy {
.init(format: formatPattern, locale: locale, timeZone: timeZone, calendar: calendar, isLenient: false, twoDigitStartDate: Date(timeIntervalSince1970: 0))
}
}
// MARK: Typed Attributed Style
@available(FoundationPreview 0.4, *)
extension Date.VerbatimFormatStyle {
/// The type preserving attributed variant of this style.
///
/// This style attributes the formatted date with the `AttributeScopes.FoundationAttributes.DateFormatFieldAttribute`.
@dynamicMemberLookup
public struct Attributed : FormatStyle, Sendable {
var base: Date.VerbatimFormatStyle
public subscript<T>(dynamicMember key: KeyPath<Date.VerbatimFormatStyle, T>) -> T {
base[keyPath: key]
}
public subscript<T>(dynamicMember key: WritableKeyPath<Date.VerbatimFormatStyle, T>) -> T {
get {
base[keyPath: key]
}
set {
base[keyPath: key] = newValue
}
}
init(style: Date.VerbatimFormatStyle) {
self.base = style
}
public func format(_ value: Date) -> AttributedString {
guard let fm = ICUDateFormatter.cachedFormatter(for: base), let (str, attributes) = fm.attributedFormat(value) else {
return AttributedString(value.description)
}
return str._attributedStringFromPositions(attributes)
}
public func locale(_ locale: Locale) -> Self {
var new = self
new.base = base.locale(locale)
return new
}
}
/// Return the type preserving attributed variant of this style.
///
/// This style attributes the formatted date with the `AttributeScopes.FoundationAttributes.DateFormatFieldAttribute`.
public var attributedStyle: Attributed {
.init(style: self)
}
}
// MARK: MatchingCollectionConsumer
@available(macOS 13.0, iOS 16.0, tvOS 16.0, watchOS 9.0, *)
extension Date.VerbatimFormatStyle : CustomConsumingRegexComponent {
public typealias RegexOutput = Date
public func consuming(_ input: String, startingAt index: String.Index, in bounds: Range<String.Index>) throws -> (upperBound: String.Index, output: Date)? {
try parseStrategy.consuming(input, startingAt: index, in: bounds)
}
}
// MARK: DiscreteFormatStyle Conformance
@available(FoundationPreview 0.4, *)
extension Date.VerbatimFormatStyle : DiscreteFormatStyle {
public func discreteInput(before input: Date) -> Date? {
guard let (bound, isIncluded) = bound(for: input, isLower: true) else {
return nil
}
return isIncluded ? bound.nextDown : bound
}
public func discreteInput(after input: Date) -> Date? {
guard let (bound, isIncluded) = bound(for: input, isLower: false) else {
return nil
}
return isIncluded ? bound.nextUp : bound
}
public func input(before input: Date) -> Date? {
let result = Calendar.nextAccuracyStep(for: input, direction: .backward)
return result < input ? result : nil
}
public func input(after input: Date) -> Date? {
let result = Calendar.nextAccuracyStep(for: input, direction: .forward)
return result > input ? result : nil
}
func bound(for input: Date, isLower: Bool) -> (bound: Date, includedInRangeOfInput: Bool)? {
var calendar = calendar
calendar.timeZone = timeZone
return calendar.bound(for: input, isLower: isLower, updateSchedule: ICUDateFormatter.DateFormatInfo.cachedUpdateSchedule(for: self))
}
}
@available(FoundationPreview 0.4, *)
extension Date.VerbatimFormatStyle.Attributed : DiscreteFormatStyle {
public func discreteInput(before input: Date) -> Date? {
base.discreteInput(before: input)
}
public func discreteInput(after input: Date) -> Date? {
base.discreteInput(after: input)
}
public func input(before input: Date) -> Date? {
base.input(before: input)
}
public func input(after input: Date) -> Date? {
base.input(after: input)
}
}
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