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Xiangyu Sun
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‎.gitignore

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.DS_Store
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/.build
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/Packages
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/*.xcodeproj

‎.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata

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‎.swiftpm/xcode/package.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
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<plist version="1.0">
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<dict>
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<key>IDEDidComputeMac32BitWarning</key>
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<true/>
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</dict>
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</plist>

‎.swiftpm/xcode/xcuserdata/sunxiangyu.xcuserdatad/xcschemes/xcschememanagement.plist

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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
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<plist version="1.0">
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<dict>
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<key>SchemeUserState</key>
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<dict>
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<key>BowlingKit.xcscheme_^#shared#^_</key>
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<dict>
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<key>orderHint</key>
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<integer>0</integer>
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</dict>
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</dict>
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</dict>
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</plist>

‎Package.swift

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// swift-tools-version:5.1
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// The swift-tools-version declares the minimum version of Swift required to build this package.
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import PackageDescription
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let package = Package(
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name: "BowlingKit",
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products: [
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// Products define the executables and libraries produced by a package, and make them visible to other packages.
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.library(
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name: "BowlingKit",
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targets: ["BowlingKit"]),
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],
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dependencies: [
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// Dependencies declare other packages that this package depends on.
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// .package(url: /* package url */, from: "1.0.0"),
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],
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targets: [
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// Targets are the basic building blocks of a package. A target can define a module or a test suite.
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// Targets can depend on other targets in this package, and on products in packages which this package depends on.
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.target(
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name: "BowlingKit",
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dependencies: []),
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.testTarget(
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name: "BowlingKitTests",
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dependencies: ["BowlingKit"]),
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]
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)

‎README.md

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# BowlingKit
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A description of this package.

‎Sources/BowlingKit/Frame.swift

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//
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// Frame.swift
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// Bowlingure
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//
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// Created by 孙翔宇 on 4/17/19.
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// Copyright © 2019 孙翔宇. All rights reserved.
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//
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import Foundation
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public final class Frame {
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public static let maxiumPinsCount: UInt = 10
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private(set) var ballKnockedDownRecord = [UInt]()
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public var state: FrameState
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weak var scoringFrame: Frame?
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let lastFrame: Bool
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public var calcualtedScore: UInt {
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return state.calcualtedScore(self)
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}
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public var isCompleted: Bool {
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return state.isFrameCompleted(self)
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}
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public var isCompletelyScored: Bool {
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return state.canBeScored(self)
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}
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var pinsLeft: UInt {
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return Frame.maxiumPinsCount - (ballKnockedDownRecord.first ?? 0)
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}
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public init(lastFrame: Bool = false) {
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self.lastFrame = lastFrame
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self.state = EmptyState()
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}
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public func addPinsKnockedDown(_ count: UInt) {
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state.addPinsKnockedDown(count, frame: self)
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}
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func addBallKnockedDownRecord(count: UInt) {
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ballKnockedDownRecord.append(count)
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}
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func getNextBallKnockedDownRecord(count: Int) -> [UInt] {
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guard let scoringFrame = scoringFrame, count != 0 else { return [] }
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var allFrames = scoringFrame.ballKnockedDownRecord
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let ballsKnockDownNeeded = allFrames.count - count
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if ballsKnockDownNeeded >= 0 {
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return Array(allFrames[..<count])
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}
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guard let scoringFrameAfterNext = scoringFrame.scoringFrame else { return allFrames }
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let ballsMissed = abs(ballsKnockDownNeeded)
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allFrames.append(contentsOf: Array(scoringFrameAfterNext.ballKnockedDownRecord[..<ballsMissed]))
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return allFrames
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}
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func getFirstBallRolledState() -> FrameState {
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return FirstBallRolledState()
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}
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func getStrikeState() -> FrameState {
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return lastFrame ? FinalFrameStrikeState() : StrikeState()
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}
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func getSpareState() -> FrameState {
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return lastFrame ? FinalFrameSpareState() : SpareState()
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}
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func getMissedState() -> FrameState {
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return MissedState()
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}
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}

‎Sources/BowlingKit/FrameState/EmptyState.swift

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//
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// EmptyState.swift
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// Bowlingure
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//
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// Created by 孙翔宇 on 4/24/19.
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// Copyright © 2019 孙翔宇. All rights reserved.
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//
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import Foundation
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public final class EmptyState: FrameState {
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public func addPinsKnockedDown(_ count: UInt, frame: Frame) {
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frame.state = count == Frame.maxiumPinsCount ? frame.getStrikeState() : frame.getFirstBallRolledState()
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frame.state.addPinsKnockedDown(count, frame: frame)
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}
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}

‎Sources/BowlingKit/FrameState/FirstBallRolledState.swift

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//
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// FirstBallRolledState.swift
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// Bowlingure
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//
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// Created by 孙翔宇 on 4/24/19.
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// Copyright © 2019 孙翔宇. All rights reserved.
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//
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import Foundation
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public final class FirstBallRolledState: FrameState {
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public func addPinsKnockedDown(_ count: UInt, frame: Frame) {
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if frame.ballKnockedDownRecord.count == 0 {
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frame.addBallKnockedDownRecord(count: count)
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} else if count == frame.pinsLeft {
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frame.state = frame.getSpareState()
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frame.state.addPinsKnockedDown(count, frame: frame)
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} else {
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frame.state = frame.getMissedState()
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frame.state.addPinsKnockedDown(count, frame: frame)
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}
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}
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}

‎Sources/BowlingKit/FrameState/FrameState.swift

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//
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// FrameState.swift
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// Bowlingure
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//
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// Created by 孙翔宇 on 4/24/19.
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// Copyright © 2019 孙翔宇. All rights reserved.
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//
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import Foundation
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public protocol FrameState {
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var maximumBallCount: UInt { get }
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var ballsRequiredForScoring: UInt { get }
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func isFrameCompleted(_ frame: Frame) -> Bool
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func canBeScored(_ frame: Frame) -> Bool
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func calcualtedScore(_ frame: Frame) -> UInt
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func ballsForScoring(_ frame: Frame) -> [UInt]?
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func addPinsKnockedDown(_ count: UInt, frame: Frame)
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}
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public extension FrameState {
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func isFrameCompleted(_ frame: Frame) -> Bool {
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return false
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}
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var maximumBallCount: UInt {
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return 2
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}
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var ballsRequiredForScoring: UInt {
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return maximumBallCount
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}
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func calcualtedScore(_ frame: Frame) -> UInt {
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return ballsForScoring(frame)?.sum() ?? 0
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}
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func canBeScored(_ frame: Frame) -> Bool {
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return ballsForScoring(frame)?.count == ballsRequiredForScoring
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}
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func ballsForScoring(_ frame: Frame) -> [UInt]? {
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return frame.ballKnockedDownRecord
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}
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}
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public protocol CompleteFrameState: FrameState {}
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public extension CompleteFrameState {
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func isFrameCompleted(_ frame: Frame) -> Bool{
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return true
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}
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func addPinsKnockedDown(_ count: UInt, frame: Frame) {
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guard frame.ballKnockedDownRecord.count < maximumBallCount else { return }
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frame.addBallKnockedDownRecord(count: count)
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}
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}
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public protocol FinalFrameState: FrameState {}
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public extension FinalFrameState {
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var maximumBallCount: UInt {
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return 3
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}
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func isFrameCompleted(_ frame: Frame) -> Bool{
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return canBeScored(frame)
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}
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func addPinsKnockedDown(_ count: UInt, frame: Frame) {
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guard !canBeScored(frame) else { return }
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frame.addBallKnockedDownRecord(count: count)
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}
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}

‎Sources/BowlingKit/FrameState/LastFrameStrikeState.swift

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//
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// FinalFrameStrikeState.swift
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// Bowlingure
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//
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// Created by 孙翔宇 on 4/24/19.
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// Copyright © 2019 孙翔宇. All rights reserved.
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//
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import Foundation
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public final class FinalFrameStrikeState: FinalFrameState {}
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public final class FinalFrameSpareState: FinalFrameState {}
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‎Sources/BowlingKit/FrameState/MissedState.swift

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//
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// MissedState.swift
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// Bowlingure
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//
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// Created by 孙翔宇 on 4/24/19.
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// Copyright © 2019 孙翔宇. All rights reserved.
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//
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import Foundation
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public final class MissedState: CompleteFrameState {}

‎Sources/BowlingKit/FrameState/SpareState.swift

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//
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// SpareState.swift
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// Bowlingure
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//
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// Created by 孙翔宇 on 4/24/19.
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// Copyright © 2019 孙翔宇. All rights reserved.
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//
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import Foundation
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public final class SpareState: CompleteFrameState {
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public func ballsForScoring(_ frame: Frame) -> [UInt]? {
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var frames = frame.ballKnockedDownRecord
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let firstBallOfNextFrame = frame.getNextBallKnockedDownRecord(count: 1)
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if !firstBallOfNextFrame.isEmpty {
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frames.append(contentsOf: firstBallOfNextFrame)
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}
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return frames
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}
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public var ballsRequiredForScoring: UInt {
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return 3
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}
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}

‎Sources/BowlingKit/FrameState/StrikeState.swift

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//
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// StrikeState.swift
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// Bowlingure
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//
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// Created by 孙翔宇 on 4/24/19.
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// Copyright © 2019 孙翔宇. All rights reserved.
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//
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import Foundation
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public final class StrikeState: CompleteFrameState {
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public func ballsForScoring(_ frame: Frame) -> [UInt]? {
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var frames = frame.ballKnockedDownRecord
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let ballsMissing = ballsRequiredForScoring - frames.count
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if ballsMissing > 0 {
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frames.append(contentsOf: frame.getNextBallKnockedDownRecord(count: ballsMissing))
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}
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return frames
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}
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public var ballsRequiredForScoring: UInt {
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return 3
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}
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public func addPinsKnockedDown(_ count: UInt, frame: Frame) {
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guard frame.ballKnockedDownRecord.count == 0 else { return }
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frame.addBallKnockedDownRecord(count: count)
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}
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}

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