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| 1 | +// |
| 2 | +// felixdumitClockEntry.swift |
| 3 | +// CodeChallenge |
| 4 | +// |
| 5 | +// Created by Felix Dumit on 12/22/16. |
| 6 | +// Copyright © 2016 iosdevelopers. All rights reserved. |
| 7 | +// |
| 8 | + |
| 9 | +import Foundation |
| 10 | + |
| 11 | +private var dateFormatter: DateFormatter = { |
| 12 | + let df = DateFormatter() |
| 13 | + df.dateFormat = "HH:mm:ss" |
| 14 | + return df |
| 15 | +}() |
| 16 | + |
| 17 | +let felixdumitClockEntry = CodeChallengeEntry<ClockChallenge>(name: "felix-dumit") { input in |
| 18 | + if #available(iOS 10.0, *) { |
| 19 | + |
| 20 | + guard let date = dateFormatter.date(from: input) else { |
| 21 | + fatalError("bad input") |
| 22 | + } |
| 23 | + |
| 24 | + func duration(for component: Calendar.Component) -> Measurement<UnitDuration> { |
| 25 | + let cmp = NSCalendar.current.component(component, from: date) |
| 26 | + return Measurement<UnitDuration>(value: Double(cmp), unit: component.durationUnit!) |
| 27 | + } |
| 28 | + |
| 29 | + let totalDuration = duration(for: .hour) + duration(for: .minute) + duration(for: .second) |
| 30 | + |
| 31 | + func clockAngle(unit: UnitDuration) -> Int { |
| 32 | + let percent = (totalDuration % unit.durationForClockFullTurn) / unit.durationForClockFullTurn |
| 33 | + return Int(360 * percent) |
| 34 | + } |
| 35 | + |
| 36 | + return (clockAngle(unit: .hours), clockAngle(unit: .minutes), clockAngle(unit: .seconds)) |
| 37 | + |
| 38 | + } else { |
| 39 | + fatalError("this solution is only available for iOS10") |
| 40 | + } |
| 41 | +} |
| 42 | + |
| 43 | +@available(iOS 10.0, *) |
| 44 | +private func /<D:Dimension>(lhs: Measurement<D>, rhs: Measurement<D>) -> Double { |
| 45 | + return lhs.converted(to: D.baseUnit()).value / rhs.converted(to: D.baseUnit()).value |
| 46 | +} |
| 47 | + |
| 48 | +@available(iOS 10.0, *) |
| 49 | +private func %<D:Dimension>(lhs: Measurement<D>, rhs: Measurement<D>) -> Measurement<D> { |
| 50 | + let value = lhs.converted(to: D.baseUnit()).value |
| 51 | + .truncatingRemainder(dividingBy: rhs.converted(to: D.baseUnit()).value) |
| 52 | + return Measurement(value: value, unit: D.baseUnit()) |
| 53 | +} |
| 54 | + |
| 55 | +@available(iOS 10.0, *) |
| 56 | +private extension UnitDuration { |
| 57 | + var durationForClockFullTurn: Measurement<UnitDuration> { |
| 58 | + switch self { |
| 59 | + case UnitDuration.hours: |
| 60 | + return Measurement<UnitDuration>(value:12, unit: .hours) |
| 61 | + case UnitDuration.minutes: |
| 62 | + return Measurement<UnitDuration>(value:1, unit: .hours) |
| 63 | + case UnitDuration.seconds: |
| 64 | + return Measurement<UnitDuration>(value: 1, unit: .minutes) |
| 65 | + default: //should not happen |
| 66 | + return Measurement<UnitDuration>(value: 0, unit: .seconds) |
| 67 | + } |
| 68 | + } |
| 69 | +} |
| 70 | + |
| 71 | +@available(iOS 10.0, *) |
| 72 | +private extension Calendar.Component { |
| 73 | + var durationUnit: UnitDuration? { |
| 74 | + switch self { |
| 75 | + case .hour: return .hours |
| 76 | + case .minute: return .minutes |
| 77 | + case .second: return .seconds |
| 78 | + default: return nil |
| 79 | + } |
| 80 | + } |
| 81 | +} |
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