61 lines
1.4 KiB
Swift
61 lines
1.4 KiB
Swift
//
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// DateOnly.swift
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// xdrip
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//
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// Created by Eduardo Pietre on 28/12/21.
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// Copyright © 2021 Johan Degraeve. All rights reserved.
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//
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import Foundation
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/// Swift has no class to represent a day
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/// - NSDate will always have time information together
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/// - DateOnly will act as a wrapper for this purpose.
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public struct DateOnly: Comparable, Equatable, Hashable {
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// MARK: - Properties.
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/// A Date object, used for comparations.
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/// Should always have time zeroed.
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public let date: Date
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// MARK: - Public
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/// Creates a DateOnly from a Date object.
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init(date: Date) {
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let calendar = Calendar.current
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// Extracts the day, month and year for date
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let dateComponents = calendar.dateComponents([.day, .month, .year], from: date)
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// Because the values are from an existing date object,
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// we can be sure they are not invalid args
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// and use Force-unwrap ('!') .
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self.date = calendar.date(from: dateComponents)!
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}
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// MARK: - Protocols
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/// Hashable Protocol
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public func hash(into hasher: inout Hasher) {
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// Only the date is enough to identify each DateOnly.
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hasher.combine(self.date)
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}
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/// Comparable Protocol
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public static func < (lhs: DateOnly, rhs: DateOnly) -> Bool {
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// Just use the date object.
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return lhs.date < rhs.date
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}
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/// Equatable Protocol
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public static func == (lhs: Self, rhs: Self) -> Bool {
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// Just use the date object.
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return lhs.date == rhs.date
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}
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}
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