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Bowling Challenge Multi-Class Planned Design Recipe

1. Describe the Problem

Count and sum the scores of a bowling game for one player.

Bowling scoring

Scoring it bowling is pretty tricky. This is a representation of how the logic works.

flowchart TD
    F1[Frame 1] --> B1.1{Ball 1}
    B1.1 -->|Score < 10| B1.1S[Record B1 score]
    B1.1 -->|Score == 10| NF1.1[<strong>Strike</strong>: FS pending and<br />move to next frame]
    NF1.1 -->|Carry strike from F1| F2
    B1.2 -->|Frame score == 10| NF1.2[<strong>Spare</strong>: BS2 pending and move<br />to next fame]
    NF1.2 -->|Carry spare from F1| F2
    B1.1S --> B1.2{Ball 2}
    B1.2 -->|Frame score < 10| FS1.2[Record F1 score and<br />move to next frame]
    FS1.2 --> F2

    F2[Frame 2] --> B2.1{Ball 1}
    B2.1 -->|Score < 10| B2.1S{B1 score}
    B2.1 -->|Score == 10| NF2.1{<strong>Strike</strong>:<br />FS pending<br />and move to<br />next frame}
    NF2.1 -->|If strike from F1,<br />carry strikes from F1 & F2| F3
    NF2.1 -->|If spare from F1,<br />record F1 bonus| F3
    NF2.1 -->|If no strike from F1,<br />carry strike from F2| F3
    B2.2 -->|Frame score == 10| NF2.2[<strong>Spare</strong>: BS2 pending and move<br />to next fame]
    NF2.2 -->|Carry spare from F2| F3
    B2.1S -->|Record score.<br />Next ball.| B2.2{Ball 2}
    B2.1S -->|Spare from F1| B2.1Ss[Add bonus to<br />F1 score]
    B2.1Ss --> B2.2
    B2.2 -->|Strike from F1| B2.2Ss[Add bonus to<br />F1 score]
    B2.2Ss --> F3[Add bonus to<br />F1 score]
    B2.2 -->|Frame score < 10| FS2.2[Record frame score and<br />move to next frame]
    FS2.2 --> F3[Frame 3]
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2. Design the Class System

classDiagram
    Application <|-- Frame
    Application <|-- ScoreCard
    Application <|-- Gameplay
    Application : +array frames
    Application : +object gameplay
    Application : +run()
    Application : +create_frames()
    class Frame{
      +array ball_scores
      +int bonus_score
      +bool strike
      +bool spare
      +add_ball_score(ball, ball_score)
      +get_ball_score(ball)
      +update_bonus_score(score)
      +bonus_score()
      +two_balls?()
      +strike(ball)
      +strike?()
      +spare()
      +spare?()
      +frame_score()
      +total_frame_score()
    }
    class ScoreCard{
      +update_pending_bonuses(frames, current_frame)
      +show_scorecard(frames)
      -update_pending_strikes(frames, current_frame)
      -update_pending_spares(frames, current_frame)
      -scorecard_segment(frame, frame_number)
      -scorecard_segment_frame_10(frame)
    }
    class Gameplay{
      +int current_frame
      +int current_ball
      +object scorecard
      +score_prompt(frames)
      +process_current_ball(frame, input)
      +next_ball(frames)
      +continue?(frames)
      +final_score(frames)
      -validate_input(input, frames)
    }
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